<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019b0de5-7c91-7ff4-8353-f3d8fdecae80,g:7ea63eb6-dc0c-46c9-8f3b-f7bfd984971c-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.troweprice.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="trow-20251231.xsd#CONSOLIDATEDBALANCESHEETSParenthetical"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019b0de5-7edc-73cf-8181-d9094a63fd1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_StatementTable_019b0de5-7edc-73cf-8181-d9094a63fd1d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edc-7c70-aa09-dfa2d7c8f18b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019b0de5-7edc-73cf-8181-d9094a63fd1d" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edc-7c70-aa09-dfa2d7c8f18b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edc-7c70-aa09-dfa2d7c8f18b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edc-7c70-aa09-dfa2d7c8f18b" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edc-7c70-aa09-dfa2d7c8f18b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edc-77c3-8a84-7df1485c18b4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edc-7c70-aa09-dfa2d7c8f18b" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edc-77c3-8a84-7df1485c18b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7edc-73b0-b6da-be05a1056026" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edc-77c3-8a84-7df1485c18b4" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7edc-73b0-b6da-be05a1056026" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019c4413-db5a-7233-b015-9b1679fc20aa" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019b0de5-7edc-73cf-8181-d9094a63fd1d" xlink:to="loc_srt_ConsolidationItemsAxis_019c4413-db5a-7233-b015-9b1679fc20aa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c4413-db5a-7233-b015-9b1679fc20aa_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019c4413-db5a-7233-b015-9b1679fc20aa" xlink:to="loc_srt_ConsolidationItemsDomain_019c4413-db5a-7233-b015-9b1679fc20aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c4413-db5a-75fd-aecf-e74c9d21edfb" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019c4413-db5a-7233-b015-9b1679fc20aa" xlink:to="loc_srt_ConsolidationItemsDomain_019c4413-db5a-75fd-aecf-e74c9d21edfb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ReportableLegalEntitiesMember_019c4413-db5a-741a-b58e-bce9c4b0422c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ReportableLegalEntitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019c4413-db5a-75fd-aecf-e74c9d21edfb" xlink:to="loc_srt_ReportableLegalEntitiesMember_019c4413-db5a-741a-b58e-bce9c4b0422c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019c4413-db5a-76f3-9029-51876cb7d0bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_Assets_019c4413-db5a-76f3-9029-51876cb7d0bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019c4414-8632-7b45-896b-42db575ce84f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_Liabilities_019c4414-8632-7b45-896b-42db575ce84f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019b0de5-7edc-7112-9b41-880d6c535da8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019b0de5-7edc-7112-9b41-880d6c535da8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_019b0de5-7edc-78f3-9fd2-770787378c15" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_019b0de5-7edc-78f3-9fd2-770787378c15" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019b0de5-7edc-79ca-97c4-135b108707e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019b0de5-7edc-79ca-97c4-135b108707e9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019b0de5-7edc-7b9a-9316-27358cccc10f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019b0de5-7edc-7b9a-9316-27358cccc10f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019b0de5-7edc-7c37-adac-60b0e9c1e071" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_CommonStockSharesIssued_019b0de5-7edc-7c37-adac-60b0e9c1e071" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019c103c-4274-79b6-a0e6-19386b6ec3aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019c103c-4274-79b6-a0e6-19386b6ec3aa" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019c446f-a01e-788d-a258-f1501032c411" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_StockholdersEquity_019c446f-a01e-788d-a258-f1501032c411" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019c446f-a01e-72bf-93ea-a8e5e43070b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_CommonStockValue_019c446f-a01e-72bf-93ea-a8e5e43070b4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_019c446f-a01e-7789-aded-06c7d0f447c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_019c446f-a01e-7789-aded-06c7d0f447c8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsUnappropriated_019c446f-a01e-7b15-bce2-c7634291995d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsUnappropriated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_RetainedEarningsUnappropriated_019c446f-a01e-7b15-bce2-c7634291995d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019c446f-a01e-75e0-ab61-6a418a13dd60" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019c446f-a01e-75e0-ab61-6a418a13dd60" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_019c446f-a01e-7d60-b884-0fd8edd87bbf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-71a4-a771-5ede397ef88d" xlink:to="loc_us-gaap_MinorityInterest_019c446f-a01e-7d60-b884-0fd8edd87bbf" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/CONSOLIDATEDSTATEMENTSOFINCOME" xlink:type="simple" xlink:href="trow-20251231.xsd#CONSOLIDATEDSTATEMENTSOFINCOME"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CONSOLIDATEDSTATEMENTSOFINCOME" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019b0de5-7edc-7785-b3c3-fa1202bea6ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:to="loc_us-gaap_StatementTable_019b0de5-7edc-7785-b3c3-fa1202bea6ad" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019b0de5-7edc-7370-994e-3231163e3906" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019b0de5-7edc-7785-b3c3-fa1202bea6ad" xlink:to="loc_srt_ProductOrServiceAxis_019b0de5-7edc-7370-994e-3231163e3906" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019b0de5-7edc-7370-994e-3231163e3906_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019b0de5-7edc-7370-994e-3231163e3906" xlink:to="loc_srt_ProductsAndServicesDomain_019b0de5-7edc-7370-994e-3231163e3906_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019b0de5-7edc-7712-bada-e9dbbfd70d4e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019b0de5-7edc-7370-994e-3231163e3906" xlink:to="loc_srt_ProductsAndServicesDomain_019b0de5-7edc-7712-bada-e9dbbfd70d4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetManagement1Member_019b0de5-7edc-769c-9ad4-45f5ecfb034a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetManagement1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019b0de5-7edc-7712-bada-e9dbbfd70d4e" xlink:to="loc_us-gaap_AssetManagement1Member_019b0de5-7edc-769c-9ad4-45f5ecfb034a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_PerformanceBasedAdvisoryFeesMember_019b0de5-7edc-7fd5-b9ec-48e2a50cecec" xlink:href="trow-20251231.xsd#trow_PerformanceBasedAdvisoryFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019b0de5-7edc-7712-bada-e9dbbfd70d4e" xlink:to="loc_trow_PerformanceBasedAdvisoryFeesMember_019b0de5-7edc-7fd5-b9ec-48e2a50cecec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_CapitalAllocationBasedIncomeMember_019b0de5-7edc-7b01-b813-9f6b53819670" xlink:href="trow-20251231.xsd#trow_CapitalAllocationBasedIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019b0de5-7edc-7712-bada-e9dbbfd70d4e" xlink:to="loc_trow_CapitalAllocationBasedIncomeMember_019b0de5-7edc-7b01-b813-9f6b53819670" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_AdministrativeDistributionServicingAndOtherFeeRevenueMember_019b22cd-1944-7f09-9fa8-27b4ede31952" xlink:href="trow-20251231.xsd#trow_AdministrativeDistributionServicingAndOtherFeeRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019b0de5-7edc-7712-bada-e9dbbfd70d4e" xlink:to="loc_trow_AdministrativeDistributionServicingAndOtherFeeRevenueMember_019b22cd-1944-7f09-9fa8-27b4ede31952" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_019b0de5-7edc-7702-b431-231d37d258ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:to="loc_us-gaap_RevenuesAbstract_019b0de5-7edc-7702-b431-231d37d258ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019b0de5-7edc-7316-b282-f08d7ee4f65a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_019b0de5-7edc-7702-b431-231d37d258ec" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019b0de5-7edc-7316-b282-f08d7ee4f65a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:to="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_019b0de5-7edc-717e-8b5a-764a45d9e1e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:to="loc_us-gaap_LaborAndRelatedExpense_019b0de5-7edc-717e-8b5a-764a45d9e1e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DistributionExpenses_019b0de5-7edc-763e-b004-277d71cb1320" xlink:href="trow-20251231.xsd#trow_DistributionExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:to="loc_trow_DistributionExpenses_019b0de5-7edc-763e-b004-277d71cb1320" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketingAndAdvertisingExpense_019b0de5-7edc-7f1b-80a9-bcdbbcf0ffea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketingAndAdvertisingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:to="loc_us-gaap_MarketingAndAdvertisingExpense_019b0de5-7edc-7f1b-80a9-bcdbbcf0ffea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ProductRelatedAndClientServicingExpenses_019b0de5-7edc-7aba-a5fc-663c9a1ce417" xlink:href="trow-20251231.xsd#trow_ProductRelatedAndClientServicingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:to="loc_trow_ProductRelatedAndClientServicingExpenses_019b0de5-7edc-7aba-a5fc-663c9a1ce417" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_TechnologyDepreciationOccupancyAndFacilityExpenses_019b0de5-7edc-741b-92d8-fc752a89c30f" xlink:href="trow-20251231.xsd#trow_TechnologyDepreciationOccupancyAndFacilityExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:to="loc_trow_TechnologyDepreciationOccupancyAndFacilityExpenses_019b0de5-7edc-741b-92d8-fc752a89c30f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherGeneralAndAdministrativeExpense_019b0de5-7edc-7b5b-a7a8-0348dcaf552a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:to="loc_us-gaap_OtherGeneralAndAdministrativeExpense_019b0de5-7edc-7b5b-a7a8-0348dcaf552a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_019b0de5-7edc-7f44-9ea2-fbee9b771b12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_019b0de5-7edc-7f44-9ea2-fbee9b771b12" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfAcquisitionCosts_019b0de5-7edc-7b34-b74a-7185249e5ce4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfAcquisitionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:to="loc_us-gaap_AmortizationOfAcquisitionCosts_019b0de5-7edc-7b34-b74a-7185249e5ce4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_019b927c-0f1e-7839-ab69-3ae153ac3122" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:to="loc_us-gaap_RestructuringCharges_019b927c-0f1e-7839-ab69-3ae153ac3122" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019b0de5-7edc-7d93-ab6e-6b441b6cab12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019b0de5-7edc-7b61-a9d1-d8b4bd9fbdfb" xlink:to="loc_us-gaap_OperatingExpenses_019b0de5-7edc-7d93-ab6e-6b441b6cab12" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019b0de5-7edc-7664-900b-1a19eb22025e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:to="loc_us-gaap_OperatingIncomeLoss_019b0de5-7edc-7664-900b-1a19eb22025e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019b0de5-7edc-7a68-88e8-789fa12bd9b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019b0de5-7edc-7a68-88e8-789fa12bd9b6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentIncomeNonoperatingOtherThanConsolidatedSponsoredInvestmentPortfolios_019b0de5-7edc-7eba-82d9-27582f0afead" xlink:href="trow-20251231.xsd#trow_InvestmentIncomeNonoperatingOtherThanConsolidatedSponsoredInvestmentPortfolios"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019b0de5-7edc-7a68-88e8-789fa12bd9b6" xlink:to="loc_trow_InvestmentIncomeNonoperatingOtherThanConsolidatedSponsoredInvestmentPortfolios_019b0de5-7edc-7eba-82d9-27582f0afead" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentIncomeNonoperatingConsolidatedSponsoredInvestmentPortfolios_019b0de5-7edc-7fc6-bc51-33097e5b1779" xlink:href="trow-20251231.xsd#trow_InvestmentIncomeNonoperatingConsolidatedSponsoredInvestmentPortfolios"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019b0de5-7edc-7a68-88e8-789fa12bd9b6" xlink:to="loc_trow_InvestmentIncomeNonoperatingConsolidatedSponsoredInvestmentPortfolios_019b0de5-7edc-7fc6-bc51-33097e5b1779" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019b0de5-7edc-7cbd-a693-bed2e8d76393" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019b0de5-7edc-7a68-88e8-789fa12bd9b6" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019b0de5-7edc-7cbd-a693-bed2e8d76393" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_019b0de5-7edc-73a1-82df-01fbdc4898e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019b0de5-7edc-7a68-88e8-789fa12bd9b6" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_019b0de5-7edc-73a1-82df-01fbdc4898e2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019b0de5-7edc-7228-996b-06fe6faf3f0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019b0de5-7edc-7228-996b-06fe6faf3f0c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019b0de5-7edc-715a-bfb6-98addd09a976" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019b0de5-7edc-715a-bfb6-98addd09a976" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019b0de5-7edc-7adb-a1fa-48b123a47640" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:to="loc_us-gaap_ProfitLoss_019b0de5-7edc-7adb-a1fa-48b123a47640" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019b0de5-7edc-7cd1-b2da-adcfabccf4d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019b0de5-7edc-7cd1-b2da-adcfabccf4d5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019b0de5-7edc-7a40-8542-48ad9163dd5b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:to="loc_us-gaap_NetIncomeLoss_019b0de5-7edc-7a40-8542-48ad9163dd5b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_019b0de5-7edc-74ef-ae24-83c45310bc0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-75f1-b47e-8fb57066b1ee" xlink:to="loc_us-gaap_EarningsPerShareAbstract_019b0de5-7edc-74ef-ae24-83c45310bc0a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019b0de5-7edc-7fcd-8fc1-d91735edcda1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_019b0de5-7edc-74ef-ae24-83c45310bc0a" xlink:to="loc_us-gaap_EarningsPerShareBasic_019b0de5-7edc-7fcd-8fc1-d91735edcda1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019b0de5-7edc-7a3f-a9ca-5dba95c29038" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_019b0de5-7edc-74ef-ae24-83c45310bc0a" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019b0de5-7edc-7a3f-a9ca-5dba95c29038" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME" xlink:type="simple" xlink:href="trow-20251231.xsd#CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019b0de5-7edc-7ec0-8ecf-ac973b4e1632" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019b0de5-7edc-7d8d-92b3-011b3a5cc204" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-7ec0-8ecf-ac973b4e1632" xlink:to="loc_us-gaap_StatementTable_019b0de5-7edc-7d8d-92b3-011b3a5cc204" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edc-7883-96d8-ae914c55862e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019b0de5-7edc-7d8d-92b3-011b3a5cc204" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edc-7883-96d8-ae914c55862e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edc-7883-96d8-ae914c55862e_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edc-7883-96d8-ae914c55862e" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edc-7883-96d8-ae914c55862e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edc-7739-a6b8-7bdf861cbd5b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edc-7883-96d8-ae914c55862e" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edc-7739-a6b8-7bdf861cbd5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7edc-7ebc-8113-b604238a7c83" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edc-7739-a6b8-7bdf861cbd5b" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7edc-7ebc-8113-b604238a7c83" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvesteeMember_019b0de5-7edc-7f8a-806d-14009cd8da86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvesteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edc-7739-a6b8-7bdf861cbd5b" xlink:to="loc_us-gaap_EquityMethodInvesteeMember_019b0de5-7edc-7f8a-806d-14009cd8da86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019b0de5-7edc-7416-9872-b90488761158" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-7ec0-8ecf-ac973b4e1632" xlink:to="loc_us-gaap_ProfitLoss_019b0de5-7edc-7416-9872-b90488761158" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_019b0de5-7edc-7f5b-9157-3fa0c3a52ba6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-7ec0-8ecf-ac973b4e1632" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_019b0de5-7edc-7f5b-9157-3fa0c3a52ba6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract_019b0de5-7edc-759a-a55b-d21b04bfe9c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_019b0de5-7edc-7f5b-9157-3fa0c3a52ba6" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract_019b0de5-7edc-759a-a55b-d21b04bfe9c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_019b0de5-7edc-716e-8fd4-d94385fee6d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract_019b0de5-7edc-759a-a55b-d21b04bfe9c5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_019b0de5-7edc-716e-8fd4-d94385fee6d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_019b0de5-7edc-79c4-88b8-71f6ed5215a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract_019b0de5-7edc-759a-a55b-d21b04bfe9c5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_019b0de5-7edc-79c4-88b8-71f6ed5215a8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax_019b1116-c679-7fbf-ad31-41bf21fc8c4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecreaseAbstract_019b0de5-7edc-759a-a55b-d21b04bfe9c5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax_019b1116-c679-7fbf-ad31-41bf21fc8c4e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_019b0de5-7edc-7e71-b723-e8c3ef6211d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_019b0de5-7edc-7f5b-9157-3fa0c3a52ba6" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_019b0de5-7edc-7e71-b723-e8c3ef6211d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_019b0de5-7edc-7630-80f6-779bfa425e8b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-7ec0-8ecf-ac973b4e1632" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_019b0de5-7edc-7630-80f6-779bfa425e8b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019b0de5-7edc-7528-9f51-f73663742875" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-7ec0-8ecf-ac973b4e1632" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019b0de5-7edc-7528-9f51-f73663742875" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_019b0de5-7edc-7181-9c43-740e61ca77ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-7ec0-8ecf-ac973b4e1632" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_019b0de5-7edc-7181-9c43-740e61ca77ad" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_019b0de5-7edc-7e8f-832f-381880f35c5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-7ec0-8ecf-ac973b4e1632" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_019b0de5-7edc-7e8f-832f-381880f35c5f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_019b0de5-7edc-7c49-8bfb-e1b593dfb109" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edc-7ec0-8ecf-ac973b4e1632" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_019b0de5-7edc-7c49-8bfb-e1b593dfb109" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" xlink:type="simple" xlink:href="trow-20251231.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019b0de5-7edd-7df2-9704-18210e33d488" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019b0de5-7edd-7d0b-b8a0-966a4047ec21" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edd-7df2-9704-18210e33d488" xlink:to="loc_us-gaap_StatementTable_019b0de5-7edd-7d0b-b8a0-966a4047ec21" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-753f-bf54-e8fa5b20da6c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019b0de5-7edd-7d0b-b8a0-966a4047ec21" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-753f-bf54-e8fa5b20da6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-753f-bf54-e8fa5b20da6c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-753f-bf54-e8fa5b20da6c" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-753f-bf54-e8fa5b20da6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7df2-8191-47129399e326" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-753f-bf54-e8fa5b20da6c" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7df2-8191-47129399e326" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7edd-7712-9dff-2b3db9f01de2" xlink:href="trow-20251231.xsd#trow_ConsolidatedInvestmentPortfoliosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7df2-8191-47129399e326" xlink:to="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7edd-7712-9dff-2b3db9f01de2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019b0de5-7edd-7f19-a549-0341e9e0d445" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edd-7df2-9704-18210e33d488" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019b0de5-7edd-7f19-a549-0341e9e0d445" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="trow-20251231.xsd#CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019b0de5-7edd-7508-9158-c538724cc1b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019b0de5-7edd-705b-84e8-a5890a9d024a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edd-7508-9158-c538724cc1b2" xlink:to="loc_us-gaap_StatementTable_019b0de5-7edd-705b-84e8-a5890a9d024a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7edd-72bb-bab1-f548bfebe97f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019b0de5-7edd-705b-84e8-a5890a9d024a" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7edd-72bb-bab1-f548bfebe97f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019b0de5-7edd-72bb-bab1-f548bfebe97f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7edd-72bb-bab1-f548bfebe97f" xlink:to="loc_us-gaap_EquityComponentDomain_019b0de5-7edd-72bb-bab1-f548bfebe97f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019b0de5-7edd-7916-836f-037f402ae0bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7edd-72bb-bab1-f548bfebe97f" xlink:to="loc_us-gaap_EquityComponentDomain_019b0de5-7edd-7916-836f-037f402ae0bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_019b0de5-7edd-7ebb-a72d-899729fbd73c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019b0de5-7edd-7916-836f-037f402ae0bc" xlink:to="loc_us-gaap_ParentMember_019b0de5-7edd-7ebb-a72d-899729fbd73c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019b0de5-7edd-7275-b8d6-01d7324b5876" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019b0de5-7edd-7ebb-a72d-899729fbd73c" xlink:to="loc_us-gaap_CommonStockMember_019b0de5-7edd-7275-b8d6-01d7324b5876" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019b0de5-7edd-7878-828b-6f60dc9d4b1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019b0de5-7edd-7ebb-a72d-899729fbd73c" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019b0de5-7edd-7878-828b-6f60dc9d4b1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsUnappropriatedMember_019b0de5-7edd-7885-a1b9-be0b6432d76e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsUnappropriatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019b0de5-7edd-7ebb-a72d-899729fbd73c" xlink:to="loc_us-gaap_RetainedEarningsUnappropriatedMember_019b0de5-7edd-7885-a1b9-be0b6432d76e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019b0de5-7edd-7aed-b4b3-83a59cf0d2fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019b0de5-7edd-7ebb-a72d-899729fbd73c" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019b0de5-7edd-7aed-b4b3-83a59cf0d2fb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019b0de5-7edd-7ba6-bb53-f2c1d0ca45b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019b0de5-7edd-7916-836f-037f402ae0bc" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019b0de5-7edd-7ba6-bb53-f2c1d0ca45b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019b0de5-7edd-7d9c-8c97-193f504ce0a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019b0de5-7edd-705b-84e8-a5890a9d024a" xlink:to="loc_us-gaap_AwardTypeAxis_019b0de5-7edd-7d9c-8c97-193f504ce0a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7d9c-8c97-193f504ce0a4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7edd-7d9c-8c97-193f504ce0a4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7d9c-8c97-193f504ce0a4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7784-af70-20efea87e656" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7edd-7d9c-8c97-193f504ce0a4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7784-af70-20efea87e656" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019b0de5-7edd-7047-a3b4-fcf217719e3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7784-af70-20efea87e656" xlink:to="loc_us-gaap_RestrictedStockMember_019b0de5-7edd-7047-a3b4-fcf217719e3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019b0de5-7edd-7027-ba11-ac3ce3b0f4a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7784-af70-20efea87e656" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019b0de5-7edd-7027-ba11-ac3ce3b0f4a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019b0de5-7edd-7f5a-9bc5-cafa56abee6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edd-7508-9158-c538724cc1b2" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019b0de5-7edd-7f5a-9bc5-cafa56abee6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_019b0de5-7edd-7f02-980d-fd960b9331c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019b0de5-7edd-7f5a-9bc5-cafa56abee6c" xlink:to="loc_us-gaap_SharesOutstanding_019b0de5-7edd-7f02-980d-fd960b9331c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019b0de5-7edd-741c-ad9d-5be7b90727e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019b0de5-7edd-7f5a-9bc5-cafa56abee6c" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019b0de5-7edd-741c-ad9d-5be7b90727e5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_NetIncomeLossExcludingNoncontrollingInterestInConsolidatedEntities_019b0de5-7edd-76d0-bbe1-44cca63e0677" xlink:href="trow-20251231.xsd#trow_NetIncomeLossExcludingNoncontrollingInterestInConsolidatedEntities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019b0de5-7edd-7f5a-9bc5-cafa56abee6c" xlink:to="loc_trow_NetIncomeLossExcludingNoncontrollingInterestInConsolidatedEntities_019b0de5-7edd-76d0-bbe1-44cca63e0677" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019b0de5-7edd-7f70-b397-0680d63c4814" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019b0de5-7edd-7f5a-9bc5-cafa56abee6c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019b0de5-7edd-7f70-b397-0680d63c4814" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCash_019b0de5-7edd-74d4-b1fd-544d198cea26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019b0de5-7edd-7f5a-9bc5-cafa56abee6c" xlink:to="loc_us-gaap_DividendsCash_019b0de5-7edd-74d4-b1fd-544d198cea26" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019b0de5-7edd-7f5a-9bc5-cafa56abee6c" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019b0de5-7edd-7557-99b8-bc1e7cfd040d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019b0de5-7edd-7557-99b8-bc1e7cfd040d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019b0de5-7edd-784d-8279-31a8ecb4e01d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019b0de5-7edd-784d-8279-31a8ecb4e01d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings_019b208a-f0ed-7778-b268-eb8f7da8b363" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings_019b208a-f0ed-7778-b268-eb8f7da8b363" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings_019b208b-6ceb-7e0d-bb53-a140b6374069" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings_019b208b-6ceb-7e0d-bb53-a140b6374069" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_019b208b-ea07-74f6-b3d4-443366c7d224" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_019b208b-ea07-74f6-b3d4-443366c7d224" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019b208b-ea07-717d-8d38-6f40b14e09bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019b208b-ea07-717d-8d38-6f40b14e09bc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019b0de5-7edd-7364-b6a8-5f1ecb1938be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019b0de5-7edd-7364-b6a8-5f1ecb1938be" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsSharebasedCompensationPaidInKind_019b0de5-7edd-7a1e-8fa6-13d8c5803138" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsSharebasedCompensationPaidInKind"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_DividendsSharebasedCompensationPaidInKind_019b0de5-7edd-7a1e-8fa6-13d8c5803138" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019b0de5-7edd-7844-811c-ded3c3de37ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019b0de5-7edd-7844-811c-ded3c3de37ba" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019c10d8-4b58-75f1-ba0b-bd8f1000d2cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019c10d8-4b58-75f1-ba0b-bd8f1000d2cd" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_019b0de5-7edd-7e58-958f-55b3e8e6d6bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_019b0de5-7edd-7e58-958f-55b3e8e6d6bd" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019c10d9-035c-7f85-a5e2-cae3509d38d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019c10d9-035c-7f85-a5e2-cae3509d38d3" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019b0de5-7edd-73d6-a1cf-74e4eb7ae076" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharebasedCompensationAbstract_019b0de5-7edd-765e-b0b5-9879f3c6ce44" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019b0de5-7edd-73d6-a1cf-74e4eb7ae076" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_019b0de5-7edd-7329-b57a-48b2b310610c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019b0de5-7edd-7988-a3a5-a77f43e5b052" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019b0de5-7edd-749b-bc23-59103d5292b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInTemporaryEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019b0de5-7edd-7508-9158-c538724cc1b2" xlink:to="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019b0de5-7edd-749b-bc23-59103d5292b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019b0de5-7edd-7e40-9874-a5ba94c692ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019b0de5-7edd-749b-bc23-59103d5292b6" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019b0de5-7edd-7e40-9874-a5ba94c692ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019b0de5-7edd-73cd-a43c-a15245177694" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019b0de5-7edd-749b-bc23-59103d5292b6" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019b0de5-7edd-73cd-a43c-a15245177694" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_019b0de5-7edd-7df1-bbb5-69ccbf88cd3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019b0de5-7edd-749b-bc23-59103d5292b6" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_019b0de5-7edd-7df1-bbb5-69ccbf88cd3e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_SubscriptionFromRedemptionDistributionToNoncontrollingInterest_019b0de5-7edd-7c9f-85df-400361863b25" xlink:href="trow-20251231.xsd#trow_SubscriptionFromRedemptionDistributionToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019b0de5-7edd-749b-bc23-59103d5292b6" xlink:to="loc_trow_SubscriptionFromRedemptionDistributionToNoncontrollingInterest_019b0de5-7edd-7c9f-85df-400361863b25" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_TemporaryEquityDecreaseDueToDeconsolidation_019b0de5-7edd-789f-a3fa-eb127a260685" xlink:href="trow-20251231.xsd#trow_TemporaryEquityDecreaseDueToDeconsolidation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019b0de5-7edd-749b-bc23-59103d5292b6" xlink:to="loc_trow_TemporaryEquityDecreaseDueToDeconsolidation_019b0de5-7edd-789f-a3fa-eb127a260685" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019b0de5-7edd-786a-852e-7e14b2a60879" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPropertyEquipmentandSoftwareDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPropertyEquipmentandSoftwareDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPropertyEquipmentandSoftwareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7edd-75d1-a27c-a816731817c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b0de5-7edd-7272-89d4-706db77b8397" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7edd-75d1-a27c-a816731817c3" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b0de5-7edd-7272-89d4-706db77b8397" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7edd-7248-8d55-b34655e18cb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b0de5-7edd-7272-89d4-706db77b8397" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7edd-7248-8d55-b34655e18cb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7edd-7248-8d55-b34655e18cb1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7edd-7248-8d55-b34655e18cb1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7edd-7248-8d55-b34655e18cb1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7edd-7098-91d9-4c91758783da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7edd-7248-8d55-b34655e18cb1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7edd-7098-91d9-4c91758783da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ComputerAndCommunicationsSoftwareAndEquipmentMember_019b0de5-7edd-7fa3-b961-ac5552a13e4d" xlink:href="trow-20251231.xsd#trow_ComputerAndCommunicationsSoftwareAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7edd-7098-91d9-4c91758783da" xlink:to="loc_trow_ComputerAndCommunicationsSoftwareAndEquipmentMember_019b0de5-7edd-7fa3-b961-ac5552a13e4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_019b0de5-7edd-7520-bbd0-5edbc0d2cb79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7edd-7098-91d9-4c91758783da" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_019b0de5-7edd-7520-bbd0-5edbc0d2cb79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_019b0de5-7edd-715e-8139-bfb703622cbf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7edd-7098-91d9-4c91758783da" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_019b0de5-7edd-715e-8139-bfb703622cbf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_019b0de5-7edd-7f96-bf29-66129f5ce1a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7edd-7098-91d9-4c91758783da" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_019b0de5-7edd-7f96-bf29-66129f5ce1a5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019b0de5-7edd-7a6b-afb8-75eb48844414" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7edd-75d1-a27c-a816731817c3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019b0de5-7edd-7a6b-afb8-75eb48844414" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESIntangibleAssetsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019b0de5-7edd-7c12-a734-ab664aba0292" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b0de5-7edd-777c-9e2d-e568b957bf2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b0de5-7edd-7c12-a734-ab664aba0292" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b0de5-7edd-777c-9e2d-e568b957bf2f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7edd-71a1-9d7e-e33a03be9e70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019b0de5-7edd-777c-9e2d-e568b957bf2f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7edd-71a1-9d7e-e33a03be9e70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7edd-71a1-9d7e-e33a03be9e70_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7edd-71a1-9d7e-e33a03be9e70" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7edd-71a1-9d7e-e33a03be9e70_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7edd-7280-b8e6-880142355e91" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7edd-71a1-9d7e-e33a03be9e70" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7edd-7280-b8e6-880142355e91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7edd-72af-9c59-b629daf527e4" xlink:href="trow-20251231.xsd#trow_InvestmentAdvisoryAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7edd-7280-b8e6-880142355e91" xlink:to="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7edd-72af-9c59-b629daf527e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019b0de5-7edd-787c-a78a-b9d59bc8de53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019b0de5-7edd-7c12-a734-ab664aba0292" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019b0de5-7edd-787c-a78a-b9d59bc8de53" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESRevenueRecognitionDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESRevenueRecognitionDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESRevenueRecognitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019b0de5-7edd-7f52-8a7d-8caeebcc3d83" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019b0de5-7edd-7c52-92df-fed5b16ab834" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019b0de5-7edd-7f52-8a7d-8caeebcc3d83" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019b0de5-7edd-7c52-92df-fed5b16ab834" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019b0de5-7edd-7290-a2af-ac9f842a65b5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019b0de5-7edd-7c52-92df-fed5b16ab834" xlink:to="loc_srt_ProductOrServiceAxis_019b0de5-7edd-7290-a2af-ac9f842a65b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-7290-a2af-ac9f842a65b5_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019b0de5-7edd-7290-a2af-ac9f842a65b5" xlink:to="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-7290-a2af-ac9f842a65b5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-72a1-985c-9022034fb0c7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019b0de5-7edd-7290-a2af-ac9f842a65b5" xlink:to="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-72a1-985c-9022034fb0c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentAdviceMember_019b0de5-7edd-7860-aaee-831b89a966b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAdviceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-72a1-985c-9022034fb0c7" xlink:to="loc_us-gaap_InvestmentAdviceMember_019b0de5-7edd-7860-aaee-831b89a966b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DistributionServiceMember_019b0de5-7edd-78c8-9d3a-f25ab6b343bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-72a1-985c-9022034fb0c7" xlink:to="loc_us-gaap_DistributionServiceMember_019b0de5-7edd-78c8-9d3a-f25ab6b343bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_NumberOfPerformanceObligations_019b0de5-7edd-7ba0-9489-6c0e86a8fd75" xlink:href="trow-20251231.xsd#trow_NumberOfPerformanceObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019b0de5-7edd-7f52-8a7d-8caeebcc3d83" xlink:to="loc_trow_NumberOfPerformanceObligations_019b0de5-7edd-7ba0-9489-6c0e86a8fd75" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESLongtermincentivecompensationDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESLongtermincentivecompensationDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/BASISOFPREPARATIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESLongtermincentivecompensationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7edd-7c76-8a51-c720c5ce7160" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7edd-7087-b103-be9bb86551fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7edd-7c76-8a51-c720c5ce7160" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7edd-7087-b103-be9bb86551fa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019b0de5-7edd-7865-80c5-867c9e048932" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7edd-7087-b103-be9bb86551fa" xlink:to="loc_us-gaap_PlanNameAxis_019b0de5-7edd-7865-80c5-867c9e048932" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019b0de5-7edd-7865-80c5-867c9e048932_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019b0de5-7edd-7865-80c5-867c9e048932" xlink:to="loc_us-gaap_PlanNameDomain_019b0de5-7edd-7865-80c5-867c9e048932_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019b0de5-7edd-7167-86fd-1161c182f851" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019b0de5-7edd-7865-80c5-867c9e048932" xlink:to="loc_us-gaap_PlanNameDomain_019b0de5-7edd-7167-86fd-1161c182f851" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_EmployeeStockBasedCompensationProgramsMember_019b0de5-7edd-7c9d-97de-60bae254f9ae" xlink:href="trow-20251231.xsd#trow_EmployeeStockBasedCompensationProgramsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019b0de5-7edd-7167-86fd-1161c182f851" xlink:to="loc_trow_EmployeeStockBasedCompensationProgramsMember_019b0de5-7edd-7c9d-97de-60bae254f9ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DirectorPlansMember_019b0de5-7edd-71fa-bcb6-4f28ea4337ef" xlink:href="trow-20251231.xsd#trow_DirectorPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019b0de5-7edd-7167-86fd-1161c182f851" xlink:to="loc_trow_DirectorPlansMember_019b0de5-7edd-71fa-bcb6-4f28ea4337ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_A2017NonEmployeeDirectorEquityPlanMember_019b0de5-7edd-7db7-a165-e20434fcb2e7" xlink:href="trow-20251231.xsd#trow_A2017NonEmployeeDirectorEquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_DirectorPlansMember_019b0de5-7edd-71fa-bcb6-4f28ea4337ef" xlink:to="loc_trow_A2017NonEmployeeDirectorEquityPlanMember_019b0de5-7edd-7db7-a165-e20434fcb2e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_A2020LongTermIncentivePlanAndThe2017NonEmployeeDirectorEquityPlanMember_019b0de5-7edd-7950-81d1-d54e766feeee" xlink:href="trow-20251231.xsd#trow_A2020LongTermIncentivePlanAndThe2017NonEmployeeDirectorEquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019b0de5-7edd-7167-86fd-1161c182f851" xlink:to="loc_trow_A2020LongTermIncentivePlanAndThe2017NonEmployeeDirectorEquityPlanMember_019b0de5-7edd-7950-81d1-d54e766feeee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_A2020LongTermIncentivePlanMember_019b0de5-7edd-7e24-bd1a-9076f0b7ec34" xlink:href="trow-20251231.xsd#trow_A2020LongTermIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019b0de5-7edd-7167-86fd-1161c182f851" xlink:to="loc_trow_A2020LongTermIncentivePlanMember_019b0de5-7edd-7e24-bd1a-9076f0b7ec34" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019b0de5-7edd-7127-b4e5-57166d4442f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7edd-7087-b103-be9bb86551fa" xlink:to="loc_us-gaap_AwardTypeAxis_019b0de5-7edd-7127-b4e5-57166d4442f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7127-b4e5-57166d4442f4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7edd-7127-b4e5-57166d4442f4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7127-b4e5-57166d4442f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7ecf-8c18-fb58eb1f5be2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7edd-7127-b4e5-57166d4442f4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7ecf-8c18-fb58eb1f5be2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_RestrictedStockAndRestrictedStockUnitsMember_019b0de5-7edd-7bc6-a1e1-1bc137d174be" xlink:href="trow-20251231.xsd#trow_RestrictedStockAndRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7ecf-8c18-fb58eb1f5be2" xlink:to="loc_trow_RestrictedStockAndRestrictedStockUnitsMember_019b0de5-7edd-7bc6-a1e1-1bc137d174be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019b0de5-7edd-7201-9318-4b1c48848126" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7ecf-8c18-fb58eb1f5be2" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019b0de5-7edd-7201-9318-4b1c48848126" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_RestrictedFundUnitsMember_019b0de5-7edd-7d2a-aa85-155c8b1020e3" xlink:href="trow-20251231.xsd#trow_RestrictedFundUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7ecf-8c18-fb58eb1f5be2" xlink:to="loc_trow_RestrictedFundUnitsMember_019b0de5-7edd-7d2a-aa85-155c8b1020e3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_PerformanceBasedRestrictedStockUnitsMember_019c4401-d465-7a1d-97f5-d411dfa83786" xlink:href="trow-20251231.xsd#trow_PerformanceBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7edd-7ecf-8c18-fb58eb1f5be2" xlink:to="loc_trow_PerformanceBasedRestrictedStockUnitsMember_019c4401-d465-7a1d-97f5-d411dfa83786" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_019b0de5-7edd-7689-bddd-b81f57e6237e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7edd-7087-b103-be9bb86551fa" xlink:to="loc_srt_TitleOfIndividualAxis_019b0de5-7edd-7689-bddd-b81f57e6237e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7edd-7689-bddd-b81f57e6237e_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_019b0de5-7edd-7689-bddd-b81f57e6237e" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7edd-7689-bddd-b81f57e6237e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7edd-7163-8224-a87dcb6a85ae" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_019b0de5-7edd-7689-bddd-b81f57e6237e" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7edd-7163-8224-a87dcb6a85ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_NonEmployeeDirectorsMember_019b0de5-7edd-7ee9-b813-8de6f59f8fae" xlink:href="trow-20251231.xsd#trow_NonEmployeeDirectorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7edd-7163-8224-a87dcb6a85ae" xlink:to="loc_trow_NonEmployeeDirectorsMember_019b0de5-7edd-7ee9-b813-8de6f59f8fae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_019c4404-1c08-776d-a366-f4eace2f4ff6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7edd-7087-b103-be9bb86551fa" xlink:to="loc_us-gaap_VestingAxis_019c4404-1c08-776d-a366-f4eace2f4ff6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019c4404-1c08-776d-a366-f4eace2f4ff6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_019c4404-1c08-776d-a366-f4eace2f4ff6" xlink:to="loc_us-gaap_VestingDomain_019c4404-1c08-776d-a366-f4eace2f4ff6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019c4404-1c08-77c1-b932-957f06ff76db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_019c4404-1c08-776d-a366-f4eace2f4ff6" xlink:to="loc_us-gaap_VestingDomain_019c4404-1c08-77c1-b932-957f06ff76db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_PerformancePeriodMember_019c4404-1c08-7785-a0d7-65467c526735" xlink:href="trow-20251231.xsd#trow_PerformancePeriodMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c4404-1c08-77c1-b932-957f06ff76db" xlink:to="loc_trow_PerformancePeriodMember_019c4404-1c08-7785-a0d7-65467c526735" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_TimeBasedRequirementMember_019c4404-1c08-77a0-87b2-0e91e54e3b7e" xlink:href="trow-20251231.xsd#trow_TimeBasedRequirementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c4404-1c08-77c1-b932-957f06ff76db" xlink:to="loc_trow_TimeBasedRequirementMember_019c4404-1c08-77a0-87b2-0e91e54e3b7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_StockholderApprovedPlansForStockOptions_019b0de5-7edd-7f16-9f87-df4b15d01cdb" xlink:href="trow-20251231.xsd#trow_StockholderApprovedPlansForStockOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7edd-7c76-8a51-c720c5ce7160" xlink:to="loc_trow_StockholderApprovedPlansForStockOptions_019b0de5-7edd-7f16-9f87-df4b15d01cdb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019b0de5-7edd-7f5c-903a-9e696e3e5a50" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7edd-7c76-8a51-c720c5ce7160" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019b0de5-7edd-7f5c-903a-9e696e3e5a50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019b0de5-7edd-77bd-9a29-46d847811bbb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7edd-7c76-8a51-c720c5ce7160" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019b0de5-7edd-77bd-9a29-46d847811bbb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019b0de5-7edd-785e-8f07-5dc51ff1707a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7edd-7c76-8a51-c720c5ce7160" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019b0de5-7edd-785e-8f07-5dc51ff1707a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentOfLongTermAwards_019b0de5-7edd-7d01-9958-9d50195bc427" xlink:href="trow-20251231.xsd#trow_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentOfLongTermAwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7edd-7c76-8a51-c720c5ce7160" xlink:to="loc_trow_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentOfLongTermAwards_019b0de5-7edd-7d01-9958-9d50195bc427" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019c1045-a6f5-766c-ae6e-d87f09e7a893" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7edd-7c76-8a51-c720c5ce7160" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019c1045-a6f5-766c-ae6e-d87f09e7a893" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_VestedRestrictedStockUnits_019b0de5-7edd-748c-837c-c8224833054c" xlink:href="trow-20251231.xsd#trow_VestedRestrictedStockUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7edd-7c76-8a51-c720c5ce7160" xlink:to="loc_trow_VestedRestrictedStockUnits_019b0de5-7edd-748c-837c-c8224833054c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ExpectedToVestStockUnits_019b0de5-7edd-7766-82c5-cea4a178636b" xlink:href="trow-20251231.xsd#trow_ExpectedToVestStockUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7edd-7c76-8a51-c720c5ce7160" xlink:to="loc_trow_ExpectedToVestStockUnits_019b0de5-7edd-7766-82c5-cea4a178636b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ExpectedToVestRestrictedStockUnits_019b0de5-7edd-740f-a859-4c13b9d402f5" xlink:href="trow-20251231.xsd#trow_ExpectedToVestRestrictedStockUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7edd-7c76-8a51-c720c5ce7160" xlink:to="loc_trow_ExpectedToVestRestrictedStockUnits_019b0de5-7edd-740f-a859-4c13b9d402f5" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/CASHEQUIVALENTSDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#CASHEQUIVALENTSDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CASHEQUIVALENTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_019b0de5-7edd-778b-bb6d-406d02a803d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_019b0de5-7edd-7f0e-ba98-087a1d88d3d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_019b0de5-7edd-778b-bb6d-406d02a803d8" xlink:to="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_019b0de5-7edd-7f0e-ba98-087a1d88d3d6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_019b0de5-7edd-775e-a97f-9e28cfc68ab2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_019b0de5-7edd-7f0e-ba98-087a1d88d3d6" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_019b0de5-7edd-775e-a97f-9e28cfc68ab2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b0de5-7edd-775e-a97f-9e28cfc68ab2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019b0de5-7edd-775e-a97f-9e28cfc68ab2" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b0de5-7edd-775e-a97f-9e28cfc68ab2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b0de5-7edd-732f-9f6e-f202c91f8d53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019b0de5-7edd-775e-a97f-9e28cfc68ab2" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b0de5-7edd-732f-9f6e-f202c91f8d53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019b0de5-7edd-7961-bc9e-c285006876e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b0de5-7edd-732f-9f6e-f202c91f8d53" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019b0de5-7edd-7961-bc9e-c285006876e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsAtCarryingValue_019b0de5-7edd-7f5a-9cb2-50e5fa8c4d86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MoneyMarketFundsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_019b0de5-7edd-778b-bb6d-406d02a803d8" xlink:to="loc_us-gaap_MoneyMarketFundsAtCarryingValue_019b0de5-7edd-7f5a-9cb2-50e5fa8c4d86" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeDividend_019b0de5-7edd-724d-b5d1-a36356d733dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeDividend"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_019b0de5-7edd-778b-bb6d-406d02a803d8" xlink:to="loc_us-gaap_InvestmentIncomeDividend_019b0de5-7edd-724d-b5d1-a36356d733dd" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/INFORMATIONABOUTRECEIVABLESREVENUESANDSERVICESInvestmentAdvisoryServicesDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#INFORMATIONABOUTRECEIVABLESREVENUESANDSERVICESInvestmentAdvisoryServicesDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/INFORMATIONABOUTRECEIVABLESREVENUESANDSERVICESInvestmentAdvisoryServicesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_trow_RevenueAndServicesLineItems_019b0de5-7edd-7c74-afcb-b4d9be886f45" xlink:href="trow-20251231.xsd#trow_RevenueAndServicesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_RevenueAndServicesTable_019b0de5-7edd-7dba-b8ec-f09716dc6a81" xlink:href="trow-20251231.xsd#trow_RevenueAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_trow_RevenueAndServicesLineItems_019b0de5-7edd-7c74-afcb-b4d9be886f45" xlink:to="loc_trow_RevenueAndServicesTable_019b0de5-7edd-7dba-b8ec-f09716dc6a81" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019b0de5-7edd-7628-9cc7-751e64d89f40" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_trow_RevenueAndServicesTable_019b0de5-7edd-7dba-b8ec-f09716dc6a81" xlink:to="loc_srt_MajorCustomersAxis_019b0de5-7edd-7628-9cc7-751e64d89f40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7628-9cc7-751e64d89f40_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019b0de5-7edd-7628-9cc7-751e64d89f40" xlink:to="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7628-9cc7-751e64d89f40_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7d65-b4c0-44e7b084c4b3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019b0de5-7edd-7628-9cc7-751e64d89f40" xlink:to="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7d65-b4c0-44e7b084c4b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentAdvisoryClientsMember_019b0de5-7edd-7e65-b88f-e9b110f7bc57" xlink:href="trow-20251231.xsd#trow_InvestmentAdvisoryClientsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7d65-b4c0-44e7b084c4b3" xlink:to="loc_trow_InvestmentAdvisoryClientsMember_019b0de5-7edd-7e65-b88f-e9b110f7bc57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019b0de5-7edd-7adf-b2fb-10af28ee50ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_trow_RevenueAndServicesTable_019b0de5-7edd-7dba-b8ec-f09716dc6a81" xlink:to="loc_us-gaap_InvestmentTypeAxis_019b0de5-7edd-7adf-b2fb-10af28ee50ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019b0de5-7edd-7adf-b2fb-10af28ee50ef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019b0de5-7edd-7adf-b2fb-10af28ee50ef" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019b0de5-7edd-7adf-b2fb-10af28ee50ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019b0de5-7edd-72c5-9555-fbb26494a2f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019b0de5-7edd-7adf-b2fb-10af28ee50ef" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019b0de5-7edd-72c5-9555-fbb26494a2f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_019b0de5-7edd-7460-9996-97aa03545418" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019b0de5-7edd-72c5-9555-fbb26494a2f9" xlink:to="loc_us-gaap_EquitySecuritiesMember_019b0de5-7edd-7460-9996-97aa03545418" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_FixedIncomeIncludingMoneyMarketMember_019b0de5-7edd-7c77-80fa-ad040b943047" xlink:href="trow-20251231.xsd#trow_FixedIncomeIncludingMoneyMarketMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019b0de5-7edd-72c5-9555-fbb26494a2f9" xlink:to="loc_trow_FixedIncomeIncludingMoneyMarketMember_019b0de5-7edd-7c77-80fa-ad040b943047" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_MultiAssetMember_019b0de5-7edd-7cb8-8a84-0f7ea4fe4985" xlink:href="trow-20251231.xsd#trow_MultiAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019b0de5-7edd-72c5-9555-fbb26494a2f9" xlink:to="loc_trow_MultiAssetMember_019b0de5-7edd-7cb8-8a84-0f7ea4fe4985" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_AlternativesInvestmentMember_019b0de5-7edd-7b64-8ccc-9d3e48f312ef" xlink:href="trow-20251231.xsd#trow_AlternativesInvestmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019b0de5-7edd-72c5-9555-fbb26494a2f9" xlink:to="loc_trow_AlternativesInvestmentMember_019b0de5-7edd-7b64-8ccc-9d3e48f312ef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019b0de5-7edd-77dd-97c9-71336cd20f8f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_trow_RevenueAndServicesTable_019b0de5-7edd-7dba-b8ec-f09716dc6a81" xlink:to="loc_srt_ProductOrServiceAxis_019b0de5-7edd-77dd-97c9-71336cd20f8f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-77dd-97c9-71336cd20f8f_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019b0de5-7edd-77dd-97c9-71336cd20f8f" xlink:to="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-77dd-97c9-71336cd20f8f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-7948-a26d-d67d73421f29" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019b0de5-7edd-77dd-97c9-71336cd20f8f" xlink:to="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-7948-a26d-d67d73421f29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetManagement1Member_019b0de5-7edd-7464-b2b5-b1e8dd2ea4af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetManagement1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-7948-a26d-d67d73421f29" xlink:to="loc_us-gaap_AssetManagement1Member_019b0de5-7edd-7464-b2b5-b1e8dd2ea4af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_PerformanceBasedAdvisoryFeesMember_019b20c6-bc7d-767a-a621-3c01f6d390a1" xlink:href="trow-20251231.xsd#trow_PerformanceBasedAdvisoryFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-7948-a26d-d67d73421f29" xlink:to="loc_trow_PerformanceBasedAdvisoryFeesMember_019b20c6-bc7d-767a-a621-3c01f6d390a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_CapitalAllocationBasedIncomeMember_019b0de5-7edd-7f44-8857-a522e2c0f6b1" xlink:href="trow-20251231.xsd#trow_CapitalAllocationBasedIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-7948-a26d-d67d73421f29" xlink:to="loc_trow_CapitalAllocationBasedIncomeMember_019b0de5-7edd-7f44-8857-a522e2c0f6b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_AdministrativeDistributionServicingAndOtherFeeRevenueMember_019b20bf-eb2e-708e-9e4f-098c7947c28e" xlink:href="trow-20251231.xsd#trow_AdministrativeDistributionServicingAndOtherFeeRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019b0de5-7edd-7948-a26d-d67d73421f29" xlink:to="loc_trow_AdministrativeDistributionServicingAndOtherFeeRevenueMember_019b20bf-eb2e-708e-9e4f-098c7947c28e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b0de5-7edd-7d5a-be1e-010c8b8e07ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_trow_RevenueAndServicesTable_019b0de5-7edd-7dba-b8ec-f09716dc6a81" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b0de5-7edd-7d5a-be1e-010c8b8e07ae" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b0de5-7edd-7d5a-be1e-010c8b8e07ae_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b0de5-7edd-7d5a-be1e-010c8b8e07ae" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b0de5-7edd-7d5a-be1e-010c8b8e07ae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b0de5-7edd-7e54-9e9d-758951a0250f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b0de5-7edd-7d5a-be1e-010c8b8e07ae" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b0de5-7edd-7e54-9e9d-758951a0250f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_AssetsUnderManagementMember_019b0de5-7edd-718b-b3ee-c9ff519f606c" xlink:href="trow-20251231.xsd#trow_AssetsUnderManagementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b0de5-7edd-7e54-9e9d-758951a0250f" xlink:to="loc_trow_AssetsUnderManagementMember_019b0de5-7edd-718b-b3ee-c9ff519f606c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019b0de5-7edd-747e-9044-22afcf599ea7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_RevenueAndServicesLineItems_019b0de5-7edd-7c74-afcb-b4d9be886f45" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019b0de5-7edd-747e-9044-22afcf599ea7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/INFORMATIONABOUTRECEIVABLESREVENUESANDSERVICESNarrativeDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#INFORMATIONABOUTRECEIVABLESREVENUESANDSERVICESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/INFORMATIONABOUTRECEIVABLESREVENUESANDSERVICESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_019b0de5-7edd-756c-92cb-2da74fd60e44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_019b0de5-7edd-727e-9f43-f0e8e45812c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019b0de5-7edd-756c-92cb-2da74fd60e44" xlink:to="loc_us-gaap_ConcentrationRiskTable_019b0de5-7edd-727e-9f43-f0e8e45812c6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019b0de5-7edd-7fdb-aa91-c907659cf819" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019b0de5-7edd-727e-9f43-f0e8e45812c6" xlink:to="loc_srt_MajorCustomersAxis_019b0de5-7edd-7fdb-aa91-c907659cf819" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7fdb-aa91-c907659cf819_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019b0de5-7edd-7fdb-aa91-c907659cf819" xlink:to="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7fdb-aa91-c907659cf819_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7846-b5ac-0ec07e78c551" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019b0de5-7edd-7fdb-aa91-c907659cf819" xlink:to="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7846-b5ac-0ec07e78c551" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentPortfoliosMember_019b0de5-7edd-733b-a488-7b83999cface" xlink:href="trow-20251231.xsd#trow_InvestmentPortfoliosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7846-b5ac-0ec07e78c551" xlink:to="loc_trow_InvestmentPortfoliosMember_019b0de5-7edd-733b-a488-7b83999cface" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentAdvisoryClientsMember_019b0de5-7edd-7b59-9d16-a6c2c0204748" xlink:href="trow-20251231.xsd#trow_InvestmentAdvisoryClientsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7846-b5ac-0ec07e78c551" xlink:to="loc_trow_InvestmentAdvisoryClientsMember_019b0de5-7edd-7b59-9d16-a6c2c0204748" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019b0de5-7edd-7add-936b-61f0d135ee98" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019b0de5-7edd-727e-9f43-f0e8e45812c6" xlink:to="loc_srt_StatementGeographicalAxis_019b0de5-7edd-7add-936b-61f0d135ee98" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019b0de5-7edd-7add-936b-61f0d135ee98_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019b0de5-7edd-7add-936b-61f0d135ee98" xlink:to="loc_srt_SegmentGeographicalDomain_019b0de5-7edd-7add-936b-61f0d135ee98_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019b0de5-7edd-7769-b61a-b4540e2c3c80" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019b0de5-7edd-7add-936b-61f0d135ee98" xlink:to="loc_srt_SegmentGeographicalDomain_019b0de5-7edd-7769-b61a-b4540e2c3c80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019b0de5-7edd-79e9-bdc3-9808a6495830" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019b0de5-7edd-7769-b61a-b4540e2c3c80" xlink:to="loc_us-gaap_NonUsMember_019b0de5-7edd-79e9-bdc3-9808a6495830" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b0de5-7edd-7eda-b7aa-76c0fdbf50ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019b0de5-7edd-727e-9f43-f0e8e45812c6" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b0de5-7edd-7eda-b7aa-76c0fdbf50ff" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b0de5-7edd-7eda-b7aa-76c0fdbf50ff_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b0de5-7edd-7eda-b7aa-76c0fdbf50ff" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b0de5-7edd-7eda-b7aa-76c0fdbf50ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b0de5-7edd-7118-ae36-820433c7e076" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019b0de5-7edd-7eda-b7aa-76c0fdbf50ff" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b0de5-7edd-7118-ae36-820433c7e076" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_AssetsUnderManagementMember_019b0de5-7edd-7904-b411-34575c30bcd2" xlink:href="trow-20251231.xsd#trow_AssetsUnderManagementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019b0de5-7edd-7118-ae36-820433c7e076" xlink:to="loc_trow_AssetsUnderManagementMember_019b0de5-7edd-7904-b411-34575c30bcd2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019b0de5-7edd-7b2c-b115-38fd9b8e04f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019b0de5-7edd-727e-9f43-f0e8e45812c6" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019b0de5-7edd-7b2c-b115-38fd9b8e04f7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019b0de5-7edd-7b2c-b115-38fd9b8e04f7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019b0de5-7edd-7b2c-b115-38fd9b8e04f7" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019b0de5-7edd-7b2c-b115-38fd9b8e04f7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019b0de5-7edd-7e08-be1a-b911c6483801" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019b0de5-7edd-7b2c-b115-38fd9b8e04f7" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019b0de5-7edd-7e08-be1a-b911c6483801" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicConcentrationRiskMember_019b0de5-7edd-7786-9119-6213af53c1b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeographicConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019b0de5-7edd-7e08-be1a-b911c6483801" xlink:to="loc_us-gaap_GeographicConcentrationRiskMember_019b0de5-7edd-7786-9119-6213af53c1b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019b0de5-7edd-7590-8765-2cc7b203d04d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019b0de5-7edd-756c-92cb-2da74fd60e44" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019b0de5-7edd-7590-8765-2cc7b203d04d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_019b0de5-7edd-7bf4-9981-8ef817478820" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019b0de5-7edd-756c-92cb-2da74fd60e44" xlink:to="loc_us-gaap_AccountsReceivableNet_019b0de5-7edd-7bf4-9981-8ef817478820" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019b0de5-7edd-7ea7-84bc-67f8141a6b0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019b0de5-7edd-756c-92cb-2da74fd60e44" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019b0de5-7edd-7ea7-84bc-67f8141a6b0a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/INVESTMENTSCarryingValueofInvestmentsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#INVESTMENTSCarryingValueofInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/INVESTMENTSCarryingValueofInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7bdf-8454-e1496b5f71fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-7396-af56-833c1eff0f20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7bdf-8454-e1496b5f71fb" xlink:to="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-7396-af56-833c1eff0f20" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019b0de5-7edd-779a-aac0-1de4769ba407" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-7396-af56-833c1eff0f20" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019b0de5-7edd-779a-aac0-1de4769ba407" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-779a-aac0-1de4769ba407_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019b0de5-7edd-779a-aac0-1de4769ba407" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-779a-aac0-1de4769ba407_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-7a0f-96dc-ea0807d2248a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019b0de5-7edd-779a-aac0-1de4769ba407" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-7a0f-96dc-ea0807d2248a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_SponsoredInvestmentPortfoliosDiscretionaryInvestmentsMember_019b0de5-7edd-7367-b366-7724e06aa72c" xlink:href="trow-20251231.xsd#trow_SponsoredInvestmentPortfoliosDiscretionaryInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-7a0f-96dc-ea0807d2248a" xlink:to="loc_trow_SponsoredInvestmentPortfoliosDiscretionaryInvestmentsMember_019b0de5-7edd-7367-b366-7724e06aa72c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_SponsoredInvestmentPortfoliosRedeemableSeedCapitalInvestmentsMember_019bfe83-de2b-74fc-b3b0-1675e1894e4f" xlink:href="trow-20251231.xsd#trow_SponsoredInvestmentPortfoliosRedeemableSeedCapitalInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-7a0f-96dc-ea0807d2248a" xlink:to="loc_trow_SponsoredInvestmentPortfoliosRedeemableSeedCapitalInvestmentsMember_019bfe83-de2b-74fc-b3b0-1675e1894e4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_SponsoredInvestmentPortfoliosInvestmentsUsedToHedgeTheDeferredCompensationLiabilitiesMember_019bfe84-19d9-7e0d-a13e-60b099efea04" xlink:href="trow-20251231.xsd#trow_SponsoredInvestmentPortfoliosInvestmentsUsedToHedgeTheDeferredCompensationLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-7a0f-96dc-ea0807d2248a" xlink:to="loc_trow_SponsoredInvestmentPortfoliosInvestmentsUsedToHedgeTheDeferredCompensationLiabilitiesMember_019bfe84-19d9-7e0d-a13e-60b099efea04" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_UtiAssetManagementCompanyIndiaMember_019b0de5-7edd-7d9e-9cda-2b11cebe685d" xlink:href="trow-20251231.xsd#trow_UtiAssetManagementCompanyIndiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-7a0f-96dc-ea0807d2248a" xlink:to="loc_trow_UtiAssetManagementCompanyIndiaMember_019b0de5-7edd-7d9e-9cda-2b11cebe685d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentsInAffiliatedPrivateInvestmentFundsCarriedInterestMember_019b0de5-7edd-7a3d-bc2c-33f9465dd6cb" xlink:href="trow-20251231.xsd#trow_InvestmentsInAffiliatedPrivateInvestmentFundsCarriedInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-7a0f-96dc-ea0807d2248a" xlink:to="loc_trow_InvestmentsInAffiliatedPrivateInvestmentFundsCarriedInterestMember_019b0de5-7edd-7a3d-bc2c-33f9465dd6cb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentsInAffiliatedPrivateInvestmentFundsSeedCoInvestmentMember_019b0de5-7edd-7fb6-bac3-4dfd157ceac1" xlink:href="trow-20251231.xsd#trow_InvestmentsInAffiliatedPrivateInvestmentFundsSeedCoInvestmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-7a0f-96dc-ea0807d2248a" xlink:to="loc_trow_InvestmentsInAffiliatedPrivateInvestmentFundsSeedCoInvestmentMember_019b0de5-7edd-7fb6-bac3-4dfd157ceac1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentPartnershipsAndOtherInvestmentsMember_019b0de5-7edd-7db2-982c-597ad87c6679" xlink:href="trow-20251231.xsd#trow_InvestmentPartnershipsAndOtherInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-7a0f-96dc-ea0807d2248a" xlink:to="loc_trow_InvestmentPartnershipsAndOtherInvestmentsMember_019b0de5-7edd-7db2-982c-597ad87c6679" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentsInAffiliatedCollateralizedLoanObligationsMember_019b0de5-7edd-7d5b-b0e4-8ae0fd79d22e" xlink:href="trow-20251231.xsd#trow_InvestmentsInAffiliatedCollateralizedLoanObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-7a0f-96dc-ea0807d2248a" xlink:to="loc_trow_InvestmentsInAffiliatedCollateralizedLoanObligationsMember_019b0de5-7edd-7d5b-b0e4-8ae0fd79d22e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-7990-86d2-715baf9d102a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-7396-af56-833c1eff0f20" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-7990-86d2-715baf9d102a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-7990-86d2-715baf9d102a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-7990-86d2-715baf9d102a" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-7990-86d2-715baf9d102a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-769b-94c6-f78b47fa4337" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-7990-86d2-715baf9d102a" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-769b-94c6-f78b47fa4337" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_019b8f89-3517-70d3-ba70-c917d8721142" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-769b-94c6-f78b47fa4337" xlink:to="loc_us-gaap_CertificatesOfDepositMember_019b8f89-3517-70d3-ba70-c917d8721142" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019b0de5-7edd-768c-8a84-f213d42dcea2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-769b-94c6-f78b47fa4337" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019b0de5-7edd-768c-8a84-f213d42dcea2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_019b0de5-7edd-70d9-8603-a838d6f9ab07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7bdf-8454-e1496b5f71fb" xlink:to="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_019b0de5-7edd-70d9-8603-a838d6f9ab07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019b0de5-7edd-772d-86ae-b81723b8f822" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7bdf-8454-e1496b5f71fb" xlink:to="loc_us-gaap_EquityMethodInvestments_019b0de5-7edd-772d-86ae-b81723b8f822" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecurities_019b0de5-7edd-7f01-ab44-69d000f8353f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7bdf-8454-e1496b5f71fb" xlink:to="loc_us-gaap_HeldToMaturitySecurities_019b0de5-7edd-7f01-ab44-69d000f8353f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_019b0de5-7edd-7b81-9053-38e767b427bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7bdf-8454-e1496b5f71fb" xlink:to="loc_us-gaap_Investments_019b0de5-7edd-7b81-9053-38e767b427bc" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/INVESTMENTSDeconsolidationImpactsonFinancialStatementsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#INVESTMENTSDeconsolidationImpactsonFinancialStatementsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/INVESTMENTSDeconsolidationImpactsonFinancialStatementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-72fb-9464-d34951956d02" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-7fe2-a139-0fadcffa070b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-72fb-9464-d34951956d02" xlink:to="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-7fe2-a139-0fadcffa070b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_019b0de5-7edd-7d89-bdbf-722907ff4daa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-7fe2-a139-0fadcffa070b" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_019b0de5-7edd-7d89-bdbf-722907ff4daa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_019b0de5-7edd-7d89-bdbf-722907ff4daa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_019b0de5-7edd-7d89-bdbf-722907ff4daa" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_019b0de5-7edd-7d89-bdbf-722907ff4daa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_019b0de5-7edd-7f0b-b8e2-7b8260d3c5d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_019b0de5-7edd-7d89-bdbf-722907ff4daa" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_019b0de5-7edd-7f0b-b8e2-7b8260d3c5d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_019b0de5-7edd-79da-a8ba-0e1b15125cc5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_019b0de5-7edd-7f0b-b8e2-7b8260d3c5d4" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_019b0de5-7edd-79da-a8ba-0e1b15125cc5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7edd-704d-b494-cd4c46376948" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-7fe2-a139-0fadcffa070b" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7edd-704d-b494-cd4c46376948" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019b0de5-7edd-704d-b494-cd4c46376948_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7edd-704d-b494-cd4c46376948" xlink:to="loc_us-gaap_EquityComponentDomain_019b0de5-7edd-704d-b494-cd4c46376948_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019b0de5-7edd-7cf3-a6d4-bb07cf0255a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7edd-704d-b494-cd4c46376948" xlink:to="loc_us-gaap_EquityComponentDomain_019b0de5-7edd-7cf3-a6d4-bb07cf0255a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019b0de5-7edd-7c5d-98c9-96506c6df7a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019b0de5-7edd-7cf3-a6d4-bb07cf0255a4" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019b0de5-7edd-7c5d-98c9-96506c6df7a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_IncreaseDecreaseInAssetsOfVotingInterestEntitiesAndVariableInterestEntities_019b0de5-7edd-7b23-b8a8-83c61491fe46" xlink:href="trow-20251231.xsd#trow_IncreaseDecreaseInAssetsOfVotingInterestEntitiesAndVariableInterestEntities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-72fb-9464-d34951956d02" xlink:to="loc_trow_IncreaseDecreaseInAssetsOfVotingInterestEntitiesAndVariableInterestEntities_019b0de5-7edd-7b23-b8a8-83c61491fe46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_IncreaseDecreaseInLiabilitiesOfVotingInterestEntitiesAndVariableInterestEntities_019b0de5-7edd-7568-9812-ab09ada6c3cb" xlink:href="trow-20251231.xsd#trow_IncreaseDecreaseInLiabilitiesOfVotingInterestEntitiesAndVariableInterestEntities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-72fb-9464-d34951956d02" xlink:to="loc_trow_IncreaseDecreaseInLiabilitiesOfVotingInterestEntitiesAndVariableInterestEntities_019b0de5-7edd-7568-9812-ab09ada6c3cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestPeriodIncreaseDecrease_019b0de5-7edd-7e9b-b581-20e8f4d90f1a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-72fb-9464-d34951956d02" xlink:to="loc_us-gaap_MinorityInterestPeriodIncreaseDecrease_019b0de5-7edd-7e9b-b581-20e8f4d90f1a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_019b0de5-7edd-7848-95a0-4fdfd8e5081a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-72fb-9464-d34951956d02" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_019b0de5-7edd-7848-95a0-4fdfd8e5081a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/INVESTMENTSNarrativeDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#INVESTMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/INVESTMENTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7b1c-ae06-af55b79dc499" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-70bb-a69f-d73da56110e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7b1c-ae06-af55b79dc499" xlink:to="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-70bb-a69f-d73da56110e4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019b0de5-7edd-79d2-b05a-fc05ad59d79d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-70bb-a69f-d73da56110e4" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019b0de5-7edd-79d2-b05a-fc05ad59d79d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-79d2-b05a-fc05ad59d79d_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019b0de5-7edd-79d2-b05a-fc05ad59d79d" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-79d2-b05a-fc05ad59d79d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-77f7-8780-292b576fac04" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019b0de5-7edd-79d2-b05a-fc05ad59d79d" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-77f7-8780-292b576fac04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_SponsoredInvestmentPortfoliosSeedCapitalInvestmentsMember_019b0de5-7edd-7b1c-9b4b-681f8a67f6ff" xlink:href="trow-20251231.xsd#trow_SponsoredInvestmentPortfoliosSeedCapitalInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-77f7-8780-292b576fac04" xlink:to="loc_trow_SponsoredInvestmentPortfoliosSeedCapitalInvestmentsMember_019b0de5-7edd-7b1c-9b4b-681f8a67f6ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentsInEuropeanCollateralizedLoanObligationsMember_019b0de5-7edd-7fc4-b23e-bf755d9a8293" xlink:href="trow-20251231.xsd#trow_InvestmentsInEuropeanCollateralizedLoanObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-77f7-8780-292b576fac04" xlink:to="loc_trow_InvestmentsInEuropeanCollateralizedLoanObligationsMember_019b0de5-7edd-7fc4-b23e-bf755d9a8293" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentsInAffiliatedCollateralizedLoanObligationsMember_019b0de5-7edd-7ff9-b040-025d60435a93" xlink:href="trow-20251231.xsd#trow_InvestmentsInAffiliatedCollateralizedLoanObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019b0de5-7edd-77f7-8780-292b576fac04" xlink:to="loc_trow_InvestmentsInAffiliatedCollateralizedLoanObligationsMember_019b0de5-7edd-7ff9-b040-025d60435a93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7a7a-beaf-1680fd9d0d12" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-70bb-a69f-d73da56110e4" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7a7a-beaf-1680fd9d0d12" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7a7a-beaf-1680fd9d0d12_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7a7a-beaf-1680fd9d0d12" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7a7a-beaf-1680fd9d0d12_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7c3b-a702-00fc07e6e88e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7a7a-beaf-1680fd9d0d12" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7c3b-a702-00fc07e6e88e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_019b0de5-7edd-7fdb-acb6-6a91ef26ffd2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7c3b-a702-00fc07e6e88e" xlink:to="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_019b0de5-7edd-7fdb-acb6-6a91ef26ffd2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-74d4-a204-b295e474f3aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-70bb-a69f-d73da56110e4" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-74d4-a204-b295e474f3aa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-74d4-a204-b295e474f3aa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-74d4-a204-b295e474f3aa" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-74d4-a204-b295e474f3aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-791f-9abd-8911c59c2dcf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-74d4-a204-b295e474f3aa" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-791f-9abd-8911c59c2dcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_VerticalStripInvestmentMember_019b0de5-7edd-7a8b-aba2-91b285edec9e" xlink:href="trow-20251231.xsd#trow_VerticalStripInvestmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-791f-9abd-8911c59c2dcf" xlink:to="loc_trow_VerticalStripInvestmentMember_019b0de5-7edd-7a8b-aba2-91b285edec9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019b0de5-7edd-7afa-96ff-c07768631c4c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019b0de5-7edd-70bb-a69f-d73da56110e4" xlink:to="loc_srt_RangeAxis_019b0de5-7edd-7afa-96ff-c07768631c4c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019b0de5-7edd-7afa-96ff-c07768631c4c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019b0de5-7edd-7afa-96ff-c07768631c4c" xlink:to="loc_srt_RangeMember_019b0de5-7edd-7afa-96ff-c07768631c4c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019b0de5-7edd-7852-8c1c-fd2a85cb6ab6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019b0de5-7edd-7afa-96ff-c07768631c4c" xlink:to="loc_srt_RangeMember_019b0de5-7edd-7852-8c1c-fd2a85cb6ab6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019b0de5-7edd-7100-873b-049d98acbad6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019b0de5-7edd-7852-8c1c-fd2a85cb6ab6" xlink:to="loc_srt_MinimumMember_019b0de5-7edd-7100-873b-049d98acbad6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019b0de5-7edd-7c09-8ef0-a783a4ee96d1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019b0de5-7edd-7852-8c1c-fd2a85cb6ab6" xlink:to="loc_srt_MaximumMember_019b0de5-7edd-7c09-8ef0-a783a4ee96d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_019b0de5-7edd-7aa6-a400-9be7958e6387" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7b1c-ae06-af55b79dc499" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_019b0de5-7edd-7aa6-a400-9be7958e6387" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeDividend_019b0de5-7edd-75e8-80be-6f0750f61e0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeDividend"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7b1c-ae06-af55b79dc499" xlink:to="loc_us-gaap_InvestmentIncomeDividend_019b0de5-7edd-75e8-80be-6f0750f61e0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUnfundedCapitalCommitmentsAmount_019b0de5-7edd-7eec-ba03-6740c8ce7a1f" xlink:href="trow-20251231.xsd#trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUnfundedCapitalCommitmentsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7b1c-ae06-af55b79dc499" xlink:to="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUnfundedCapitalCommitmentsAmount_019b0de5-7edd-7eec-ba03-6740c8ce7a1f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_PercentOfCollateralizedLoanObligationsInvestedVerticalStrips_019b0de5-7edd-7d6b-80d9-c062beb1ebbe" xlink:href="trow-20251231.xsd#trow_PercentOfCollateralizedLoanObligationsInvestedVerticalStrips"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7b1c-ae06-af55b79dc499" xlink:to="loc_trow_PercentOfCollateralizedLoanObligationsInvestedVerticalStrips_019b0de5-7edd-7d6b-80d9-c062beb1ebbe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtRepurchaseAgreements_019b0de5-7edd-7fa4-8e53-d53ef809c830" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtRepurchaseAgreements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7b1c-ae06-af55b79dc499" xlink:to="loc_us-gaap_SecuredDebtRepurchaseAgreements_019b0de5-7edd-7fa4-8e53-d53ef809c830" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentInterestRate_019b0de5-7edd-7c42-9321-b852ded90aee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019b0de5-7edd-7b1c-ae06-af55b79dc499" xlink:to="loc_us-gaap_InvestmentInterestRate_019b0de5-7edd-7c42-9321-b852ded90aee" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/INVESTMENTSVariableInterestEntitiesDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#INVESTMENTSVariableInterestEntitiesDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/INVESTMENTSVariableInterestEntitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_019b0de5-7edd-7ad6-80c3-ea480e6d0e36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019b0de5-7edd-7123-abef-cb7c34005bfa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019b0de5-7edd-7ad6-80c3-ea480e6d0e36" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019b0de5-7edd-7123-abef-cb7c34005bfa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7c59-951e-92d166bbf442" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019b0de5-7edd-7123-abef-cb7c34005bfa" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7c59-951e-92d166bbf442" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7c59-951e-92d166bbf442_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7c59-951e-92d166bbf442" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7c59-951e-92d166bbf442_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-70dd-9a77-e2a5507f099d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7c59-951e-92d166bbf442" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-70dd-9a77-e2a5507f099d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_019b0de5-7edd-7be6-a98d-425504421448" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-70dd-9a77-e2a5507f099d" xlink:to="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_019b0de5-7edd-7be6-a98d-425504421448" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureInvestmentCarryingValuesAmount_019b0de5-7edd-7941-aa7c-aa441d117fe8" xlink:href="trow-20251231.xsd#trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureInvestmentCarryingValuesAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019b0de5-7edd-7ad6-80c3-ea480e6d0e36" xlink:to="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureInvestmentCarryingValuesAmount_019b0de5-7edd-7941-aa7c-aa441d117fe8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUnfundedCapitalCommitmentsAmount_019b0de5-7edd-7b9d-aa7c-3295571504cd" xlink:href="trow-20251231.xsd#trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUnfundedCapitalCommitmentsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019b0de5-7edd-7ad6-80c3-ea480e6d0e36" xlink:to="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureUnfundedCapitalCommitmentsAmount_019b0de5-7edd-7b9d-aa7c-3295571504cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureAccountsReceivableAmount_019b0de5-7edd-74b0-b71b-f9966461cf1c" xlink:href="trow-20251231.xsd#trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureAccountsReceivableAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019b0de5-7edd-7ad6-80c3-ea480e6d0e36" xlink:to="loc_trow_VariableInterestEntityReportingEntityInvolvementMaximumLossExposureAccountsReceivableAmount_019b0de5-7edd-74b0-b71b-f9966461cf1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_019b0de5-7edd-7eae-a785-464f3aef61d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019b0de5-7edd-7ad6-80c3-ea480e6d0e36" xlink:to="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_019b0de5-7edd-7eae-a785-464f3aef61d2" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/INVESTMENTSTotalAssetsLiabilitiesandNoncontrollingInterestsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#INVESTMENTSTotalAssetsLiabilitiesandNoncontrollingInterestsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/INVESTMENTSTotalAssetsLiabilitiesandNoncontrollingInterestsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019b0de5-7edd-7a9c-b151-2c7c3fa12ded" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSubsidiaryOrEquityMethodInvesteeTable_019b0de5-7edd-7eaf-a9f8-fa51ea97c9bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSubsidiaryOrEquityMethodInvesteeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019b0de5-7edd-7a9c-b151-2c7c3fa12ded" xlink:to="loc_us-gaap_ScheduleOfSubsidiaryOrEquityMethodInvesteeTable_019b0de5-7edd-7eaf-a9f8-fa51ea97c9bc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7d18-a082-9e1fd76a8c7b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSubsidiaryOrEquityMethodInvesteeTable_019b0de5-7edd-7eaf-a9f8-fa51ea97c9bc" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7d18-a082-9e1fd76a8c7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7d18-a082-9e1fd76a8c7b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7d18-a082-9e1fd76a8c7b" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7d18-a082-9e1fd76a8c7b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-712b-bd00-82a28762357f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7d18-a082-9e1fd76a8c7b" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-712b-bd00-82a28762357f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7edd-76c9-959b-6a3d012f5ec2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-712b-bd00-82a28762357f" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7edd-76c9-959b-6a3d012f5ec2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019b0de5-7edd-7ed9-9473-ce73da92284d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019b0de5-7edd-7a9c-b151-2c7c3fa12ded" xlink:to="loc_us-gaap_Assets_019b0de5-7edd-7ed9-9473-ce73da92284d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019b0de5-7edd-7519-b459-0e681a82a769" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019b0de5-7edd-7a9c-b151-2c7c3fa12ded" xlink:to="loc_us-gaap_Liabilities_019b0de5-7edd-7519-b459-0e681a82a769" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_019b0de5-7edd-7ba4-900e-7aa37f506869" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems_019b0de5-7edd-7a9c-b151-2c7c3fa12ded" xlink:to="loc_us-gaap_MinorityInterest_019b0de5-7edd-7ba4-900e-7aa37f506869" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/FAIRVALUEMEASUREMENTSScheduleofFairValueMeasurementsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#FAIRVALUEMEASUREMENTSScheduleofFairValueMeasurementsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/FAIRVALUEMEASUREMENTSScheduleofFairValueMeasurementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7edd-7d8f-a660-2ec0c037d66b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7edd-7a18-8c48-56603cde7c69" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7edd-7d8f-a660-2ec0c037d66b" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7edd-7a18-8c48-56603cde7c69" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7edd-740c-8685-f3b114e36732" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7edd-7a18-8c48-56603cde7c69" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7edd-740c-8685-f3b114e36732" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7edd-740c-8685-f3b114e36732_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7edd-740c-8685-f3b114e36732" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7edd-740c-8685-f3b114e36732_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7edd-71f1-a9e1-e5e16b8ff18c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7edd-740c-8685-f3b114e36732" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7edd-71f1-a9e1-e5e16b8ff18c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019b0de5-7edd-770a-9a4b-d2d514d03cfc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7edd-71f1-a9e1-e5e16b8ff18c" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019b0de5-7edd-770a-9a4b-d2d514d03cfc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019b0de5-7edd-7bd5-ad16-efc75cc6c707" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7edd-71f1-a9e1-e5e16b8ff18c" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019b0de5-7edd-7bd5-ad16-efc75cc6c707" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-7a74-8e78-50a1fd71de70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7edd-7a18-8c48-56603cde7c69" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-7a74-8e78-50a1fd71de70" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-7a74-8e78-50a1fd71de70_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-7a74-8e78-50a1fd71de70" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-7a74-8e78-50a1fd71de70_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-7931-a0d5-fd344e4a9c49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019b0de5-7edd-7a74-8e78-50a1fd71de70" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-7931-a0d5-fd344e4a9c49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_SponsoredInvestmentPortfoliosDiscretionaryInvestmentsMember_019b0de5-7edd-775c-b04e-63fc16565510" xlink:href="trow-20251231.xsd#trow_SponsoredInvestmentPortfoliosDiscretionaryInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-7931-a0d5-fd344e4a9c49" xlink:to="loc_trow_SponsoredInvestmentPortfoliosDiscretionaryInvestmentsMember_019b0de5-7edd-775c-b04e-63fc16565510" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_SponsoredInvestmentPortfoliosRedeemableSeedCapitalInvestmentsMember_019bfe7c-862a-7fef-9232-dffd90ba4581" xlink:href="trow-20251231.xsd#trow_SponsoredInvestmentPortfoliosRedeemableSeedCapitalInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-7931-a0d5-fd344e4a9c49" xlink:to="loc_trow_SponsoredInvestmentPortfoliosRedeemableSeedCapitalInvestmentsMember_019bfe7c-862a-7fef-9232-dffd90ba4581" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_SponsoredInvestmentPortfoliosInvestmentsUsedToHedgeTheDeferredCompensationLiabilitiesMember_019bfe7b-bd96-7521-95ff-da5fcbf6b691" xlink:href="trow-20251231.xsd#trow_SponsoredInvestmentPortfoliosInvestmentsUsedToHedgeTheDeferredCompensationLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019b0de5-7edd-7931-a0d5-fd344e4a9c49" xlink:to="loc_trow_SponsoredInvestmentPortfoliosInvestmentsUsedToHedgeTheDeferredCompensationLiabilitiesMember_019bfe7b-bd96-7521-95ff-da5fcbf6b691" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019b0de5-7edd-7441-b4da-e1a6bca58475" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7edd-7d8f-a660-2ec0c037d66b" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019b0de5-7edd-7441-b4da-e1a6bca58475" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_019b0de5-7edd-734a-98eb-4b28b8061276" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7edd-7d8f-a660-2ec0c037d66b" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_019b0de5-7edd-734a-98eb-4b28b8061276" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_OtherInvestmentsFairValueDisclosure_019b0de5-7edd-7dc4-9c94-3ac2dbce0562" xlink:href="trow-20251231.xsd#trow_OtherInvestmentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7edd-7d8f-a660-2ec0c037d66b" xlink:to="loc_trow_OtherInvestmentsFairValueDisclosure_019b0de5-7edd-7dc4-9c94-3ac2dbce0562" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure_019b0de5-7edd-7685-8389-335574d031de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7edd-7d8f-a660-2ec0c037d66b" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure_019b0de5-7edd-7685-8389-335574d031de" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019b0de5-7edd-74dc-aac0-c2bdf0ff9f30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7edd-7d8f-a660-2ec0c037d66b" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019b0de5-7edd-74dc-aac0-c2bdf0ff9f30" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/FAIRVALUEMEASUREMENTSNarrativeDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#FAIRVALUEMEASUREMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/FAIRVALUEMEASUREMENTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7edd-7399-ab94-e32d2a4e1315" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7edd-7498-b81b-2fc6c65518be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7edd-7399-ab94-e32d2a4e1315" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7edd-7498-b81b-2fc6c65518be" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7edd-7840-ad16-8768e437589d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7edd-7498-b81b-2fc6c65518be" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7edd-7840-ad16-8768e437589d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7edd-7840-ad16-8768e437589d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7edd-7840-ad16-8768e437589d" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7edd-7840-ad16-8768e437589d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7edd-71bc-8a93-97a4ccf2bc81" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7edd-7840-ad16-8768e437589d" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7edd-71bc-8a93-97a4ccf2bc81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019b0de5-7edd-784f-9928-7a74c493195f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7edd-71bc-8a93-97a4ccf2bc81" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019b0de5-7edd-784f-9928-7a74c493195f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_019b0de5-7edd-76ec-8302-00a18b3ce97a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7edd-7399-ab94-e32d2a4e1315" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_019b0de5-7edd-76ec-8302-00a18b3ce97a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/CONSOLIDATEDINVESTMENTPRODUCTSNetAssetsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#CONSOLIDATEDINVESTMENTPRODUCTSNetAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CONSOLIDATEDINVESTMENTPRODUCTSNetAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_019b0de5-7edd-72ca-a15e-003d9c3ed4ef" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CondensedBalanceSheetStatementsCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedBalanceSheetStatementTable_019b0de5-7edd-76ed-a6c4-179f71186575" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CondensedBalanceSheetStatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_019b0de5-7edd-72ca-a15e-003d9c3ed4ef" xlink:to="loc_srt_CondensedBalanceSheetStatementTable_019b0de5-7edd-76ed-a6c4-179f71186575" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019b0de5-7edd-7f25-9af5-019eabdd26eb" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_019b0de5-7edd-76ed-a6c4-179f71186575" xlink:to="loc_srt_ConsolidationItemsAxis_019b0de5-7edd-7f25-9af5-019eabdd26eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019b0de5-7edd-7f25-9af5-019eabdd26eb_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019b0de5-7edd-7f25-9af5-019eabdd26eb" xlink:to="loc_srt_ConsolidationItemsDomain_019b0de5-7edd-7f25-9af5-019eabdd26eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019b0de5-7edd-7908-889e-a9d2f83fd253" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019b0de5-7edd-7f25-9af5-019eabdd26eb" xlink:to="loc_srt_ConsolidationItemsDomain_019b0de5-7edd-7908-889e-a9d2f83fd253" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ReportableLegalEntitiesMember_019b0de5-7edd-725d-b2c1-6825c2c1e91d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ReportableLegalEntitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019b0de5-7edd-7908-889e-a9d2f83fd253" xlink:to="loc_srt_ReportableLegalEntitiesMember_019b0de5-7edd-725d-b2c1-6825c2c1e91d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7d31-a594-e251fed749b3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_019b0de5-7edd-76ed-a6c4-179f71186575" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7d31-a594-e251fed749b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7d31-a594-e251fed749b3_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7d31-a594-e251fed749b3" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7d31-a594-e251fed749b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7f79-b9df-2af83d299ebb" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7edd-7d31-a594-e251fed749b3" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7f79-b9df-2af83d299ebb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7edd-7e45-8e74-04a04d2f7e3c" xlink:href="trow-20251231.xsd#trow_ConsolidatedInvestmentPortfoliosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7edd-7f79-b9df-2af83d299ebb" xlink:to="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7edd-7e45-8e74-04a04d2f7e3c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_VotingInterestEntitiesMember_019b0de5-7edd-772d-a8f2-0ee8310f28e0" xlink:href="trow-20251231.xsd#trow_VotingInterestEntitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7edd-7e45-8e74-04a04d2f7e3c" xlink:to="loc_trow_VotingInterestEntitiesMember_019b0de5-7edd-772d-a8f2-0ee8310f28e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7edd-7dce-820d-9a0e42b7b6ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7edd-7e45-8e74-04a04d2f7e3c" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7edd-7dce-820d-9a0e42b7b6ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019b0de5-7edd-7bb9-9342-b2ba7a1de3c2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_019b0de5-7edd-76ed-a6c4-179f71186575" xlink:to="loc_srt_MajorCustomersAxis_019b0de5-7edd-7bb9-9342-b2ba7a1de3c2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7bb9-9342-b2ba7a1de3c2_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019b0de5-7edd-7bb9-9342-b2ba7a1de3c2" xlink:to="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7bb9-9342-b2ba7a1de3c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7a31-82d5-3e0a1912d99a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019b0de5-7edd-7bb9-9342-b2ba7a1de3c2" xlink:to="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7a31-82d5-3e0a1912d99a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentPortfoliosMember_019b0de5-7edd-7bcf-8921-49bba20d8f58" xlink:href="trow-20251231.xsd#trow_InvestmentPortfoliosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019b0de5-7edd-7a31-82d5-3e0a1912d99a" xlink:to="loc_trow_InvestmentPortfoliosMember_019b0de5-7edd-7bcf-8921-49bba20d8f58" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_019b0de5-7edd-795c-8d7e-0b761946ac68" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_019b0de5-7edd-76ed-a6c4-179f71186575" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_019b0de5-7edd-795c-8d7e-0b761946ac68" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b0de5-7edd-795c-8d7e-0b761946ac68_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019b0de5-7edd-795c-8d7e-0b761946ac68" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b0de5-7edd-795c-8d7e-0b761946ac68_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b0de5-7edd-7f72-aa1b-88ef740d03a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019b0de5-7edd-795c-8d7e-0b761946ac68" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b0de5-7edd-7f72-aa1b-88ef740d03a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019b0de5-7edd-75ce-9c0c-bc8f649dc9bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019b0de5-7edd-7f72-aa1b-88ef740d03a0" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019b0de5-7edd-75ce-9c0c-bc8f649dc9bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019b0de5-7edd-7bcf-8632-69ef9269183f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_019b0de5-7edd-72ca-a15e-003d9c3ed4ef" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019b0de5-7edd-7bcf-8632-69ef9269183f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_019b0de5-7edd-7ade-8e8f-d2a2c3406c80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_019b0de5-7edd-72ca-a15e-003d9c3ed4ef" xlink:to="loc_us-gaap_Investments_019b0de5-7edd-7ade-8e8f-d2a2c3406c80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_019b0de5-7edd-7080-a636-c2630f9e2d48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_019b0de5-7edd-72ca-a15e-003d9c3ed4ef" xlink:to="loc_us-gaap_OtherAssets_019b0de5-7edd-7080-a636-c2630f9e2d48" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019b0de5-7edd-70d2-af30-100da17c36c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_019b0de5-7edd-72ca-a15e-003d9c3ed4ef" xlink:to="loc_us-gaap_Assets_019b0de5-7edd-70d2-af30-100da17c36c7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019b0de5-7edd-71c0-89f3-e7af5279b285" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_019b0de5-7edd-72ca-a15e-003d9c3ed4ef" xlink:to="loc_us-gaap_Liabilities_019b0de5-7edd-71c0-89f3-e7af5279b285" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNet_019b0de5-7fa3-7e2f-b300-412afce5c5af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_019b0de5-7edd-72ca-a15e-003d9c3ed4ef" xlink:to="loc_us-gaap_AssetsNet_019b0de5-7fa3-7e2f-b300-412afce5c5af" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentSponsoredInvestmentPortfoliosAttributabletoParent_019b0de5-7fa3-71db-acc1-4433599adb4c" xlink:href="trow-20251231.xsd#trow_InvestmentSponsoredInvestmentPortfoliosAttributabletoParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_019b0de5-7edd-72ca-a15e-003d9c3ed4ef" xlink:to="loc_trow_InvestmentSponsoredInvestmentPortfoliosAttributabletoParent_019b0de5-7fa3-71db-acc1-4433599adb4c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019b0de5-7fa3-7110-920a-01be1140a049" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_019b0de5-7edd-72ca-a15e-003d9c3ed4ef" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019b0de5-7fa3-7110-920a-01be1140a049" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/CONSOLIDATEDINVESTMENTPRODUCTSOperatingResultsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#CONSOLIDATEDINVESTMENTPRODUCTSOperatingResultsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CONSOLIDATEDINVESTMENTPRODUCTSOperatingResultsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedIncomeStatementsCaptionsLineItems_019b0de5-7fa3-7a2f-9503-5809b95500d5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CondensedIncomeStatementsCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedIncomeStatementTable_019b0de5-7fa3-7739-8148-cccdd13a2507" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CondensedIncomeStatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_019b0de5-7fa3-7a2f-9503-5809b95500d5" xlink:to="loc_srt_CondensedIncomeStatementTable_019b0de5-7fa3-7739-8148-cccdd13a2507" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-7646-af0e-3f55fc142748" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedIncomeStatementTable_019b0de5-7fa3-7739-8148-cccdd13a2507" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-7646-af0e-3f55fc142748" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-7646-af0e-3f55fc142748_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-7646-af0e-3f55fc142748" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-7646-af0e-3f55fc142748_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-7e7e-abf3-a695203d67cd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-7646-af0e-3f55fc142748" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-7e7e-abf3-a695203d67cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7fa3-718a-a5a2-aceea42fa289" xlink:href="trow-20251231.xsd#trow_ConsolidatedInvestmentPortfoliosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-7e7e-abf3-a695203d67cd" xlink:to="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7fa3-718a-a5a2-aceea42fa289" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_VotingInterestEntitiesMember_019b0de5-7fa3-74fa-9cbc-edc9551a3268" xlink:href="trow-20251231.xsd#trow_VotingInterestEntitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7fa3-718a-a5a2-aceea42fa289" xlink:to="loc_trow_VotingInterestEntitiesMember_019b0de5-7fa3-74fa-9cbc-edc9551a3268" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7fa3-7d77-bf60-eabfad0920c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7fa3-718a-a5a2-aceea42fa289" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7fa3-7d77-bf60-eabfad0920c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7c9d-8a9a-038236592b4b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedIncomeStatementTable_019b0de5-7fa3-7739-8148-cccdd13a2507" xlink:to="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7c9d-8a9a-038236592b4b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7c9d-8a9a-038236592b4b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7c9d-8a9a-038236592b4b" xlink:to="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7c9d-8a9a-038236592b4b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7f15-92d0-c6681ce4f8e0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7c9d-8a9a-038236592b4b" xlink:to="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7f15-92d0-c6681ce4f8e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ReportableLegalEntitiesMember_019b0de5-7fa3-7ce7-b774-eb02d51b93ff" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ReportableLegalEntitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7f15-92d0-c6681ce4f8e0" xlink:to="loc_srt_ReportableLegalEntitiesMember_019b0de5-7fa3-7ce7-b774-eb02d51b93ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019b0de5-7fa3-787c-8006-c23f835a27b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_019b0de5-7fa3-7a2f-9503-5809b95500d5" xlink:to="loc_us-gaap_OperatingExpenses_019b0de5-7fa3-787c-8006-c23f835a27b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeNet_019b0de5-7fa3-714b-8b66-17017db07c57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_019b0de5-7fa3-7a2f-9503-5809b95500d5" xlink:to="loc_us-gaap_InvestmentIncomeNet_019b0de5-7fa3-714b-8b66-17017db07c57" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019b0de5-7fa3-713f-afeb-83cd2aa9216d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_019b0de5-7fa3-7a2f-9503-5809b95500d5" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019b0de5-7fa3-713f-afeb-83cd2aa9216d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_IncomeLossfromContinuingOperationsbeforeIncomeTaxesAttributabletoParent_019b0de5-7fa3-70d2-96ec-fb59daf584a0" xlink:href="trow-20251231.xsd#trow_IncomeLossfromContinuingOperationsbeforeIncomeTaxesAttributabletoParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_019b0de5-7fa3-7a2f-9503-5809b95500d5" xlink:to="loc_trow_IncomeLossfromContinuingOperationsbeforeIncomeTaxesAttributabletoParent_019b0de5-7fa3-70d2-96ec-fb59daf584a0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019b0de5-7fa3-79f4-88ad-a2154598bc07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_019b0de5-7fa3-7a2f-9503-5809b95500d5" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019b0de5-7fa3-79f4-88ad-a2154598bc07" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/CONSOLIDATEDINVESTMENTPRODUCTSNarrativeDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#CONSOLIDATEDINVESTMENTPRODUCTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CONSOLIDATEDINVESTMENTPRODUCTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedIncomeStatementsCaptionsLineItems_019b0de5-7fa3-7996-81ec-0141b7b49ddd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CondensedIncomeStatementsCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedIncomeStatementTable_019b0de5-7fa3-771f-944e-c8109b8039a4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CondensedIncomeStatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_019b0de5-7fa3-7996-81ec-0141b7b49ddd" xlink:to="loc_srt_CondensedIncomeStatementTable_019b0de5-7fa3-771f-944e-c8109b8039a4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7398-817e-fbbc4ffb83cd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedIncomeStatementTable_019b0de5-7fa3-771f-944e-c8109b8039a4" xlink:to="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7398-817e-fbbc4ffb83cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7398-817e-fbbc4ffb83cd_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7398-817e-fbbc4ffb83cd" xlink:to="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7398-817e-fbbc4ffb83cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7023-84d7-87765972f4b0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7398-817e-fbbc4ffb83cd" xlink:to="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7023-84d7-87765972f4b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationEliminationsMember_019b0de5-7fa3-78f6-8c6a-0a4631432821" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationEliminationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7023-84d7-87765972f4b0" xlink:to="loc_srt_ConsolidationEliminationsMember_019b0de5-7fa3-78f6-8c6a-0a4631432821" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019b0de5-7fa3-772b-a9ba-db175c30361f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_019b0de5-7fa3-7996-81ec-0141b7b49ddd" xlink:to="loc_us-gaap_OperatingExpenses_019b0de5-7fa3-772b-a9ba-db175c30361f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b0de5-7fa3-7890-8a64-4d4fd361357e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_019b0de5-7fa3-7996-81ec-0141b7b49ddd" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b0de5-7fa3-7890-8a64-4d4fd361357e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/CONSOLIDATEDINVESTMENTPRODUCTSStatementofCashFlowsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#CONSOLIDATEDINVESTMENTPRODUCTSStatementofCashFlowsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CONSOLIDATEDINVESTMENTPRODUCTSStatementofCashFlowsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_019b0de5-7fa3-7ea9-a0a9-c56fb3efed4b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CondensedCashFlowStatementsCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedCashFlowStatementTable_019b0de5-7fa3-7268-a1f6-517dc80361ea" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CondensedCashFlowStatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_019b0de5-7fa3-7ea9-a0a9-c56fb3efed4b" xlink:to="loc_srt_CondensedCashFlowStatementTable_019b0de5-7fa3-7268-a1f6-517dc80361ea" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-759d-8cd7-dd788a130e3e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedCashFlowStatementTable_019b0de5-7fa3-7268-a1f6-517dc80361ea" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-759d-8cd7-dd788a130e3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-759d-8cd7-dd788a130e3e_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-759d-8cd7-dd788a130e3e" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-759d-8cd7-dd788a130e3e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-7d73-9ffa-4eafe4ca5817" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-759d-8cd7-dd788a130e3e" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-7d73-9ffa-4eafe4ca5817" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7fa3-7fa3-ab3e-05f594595c6f" xlink:href="trow-20251231.xsd#trow_ConsolidatedInvestmentPortfoliosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-7d73-9ffa-4eafe4ca5817" xlink:to="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7fa3-7fa3-ab3e-05f594595c6f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_VotingInterestEntitiesMember_019b0de5-7fa3-7814-9be4-8e95b66d85aa" xlink:href="trow-20251231.xsd#trow_VotingInterestEntitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7fa3-7fa3-ab3e-05f594595c6f" xlink:to="loc_trow_VotingInterestEntitiesMember_019b0de5-7fa3-7814-9be4-8e95b66d85aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7fa3-7e54-b28d-c20829dff400" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7fa3-7fa3-ab3e-05f594595c6f" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7fa3-7e54-b28d-c20829dff400" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7c03-be98-f10345805cb7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedCashFlowStatementTable_019b0de5-7fa3-7268-a1f6-517dc80361ea" xlink:to="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7c03-be98-f10345805cb7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7c03-be98-f10345805cb7_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7c03-be98-f10345805cb7" xlink:to="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7c03-be98-f10345805cb7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7442-9112-4f199fdb42bd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019b0de5-7fa3-7c03-be98-f10345805cb7" xlink:to="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7442-9112-4f199fdb42bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ReportableLegalEntitiesMember_019b0de5-7fa3-7574-82c1-9bfb16957bc7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ReportableLegalEntitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019b0de5-7fa3-7442-9112-4f199fdb42bd" xlink:to="loc_srt_ReportableLegalEntitiesMember_019b0de5-7fa3-7574-82c1-9bfb16957bc7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b0de5-7fa3-719c-9384-f850a9840471" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_019b0de5-7fa3-7ea9-a0a9-c56fb3efed4b" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b0de5-7fa3-719c-9384-f850a9840471" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019b0de5-7fa3-7110-96be-cba4c2b7e19e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_019b0de5-7fa3-7ea9-a0a9-c56fb3efed4b" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019b0de5-7fa3-7110-96be-cba4c2b7e19e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b0de5-7fa3-7969-a164-237425b877b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_019b0de5-7fa3-7ea9-a0a9-c56fb3efed4b" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b0de5-7fa3-7969-a164-237425b877b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019b0de5-7fa3-7d70-a263-2c48cb405abb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_019b0de5-7fa3-7ea9-a0a9-c56fb3efed4b" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019b0de5-7fa3-7d70-a263-2c48cb405abb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019b0de5-7fa3-78da-a667-6dca772763d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_019b0de5-7fa3-7ea9-a0a9-c56fb3efed4b" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019b0de5-7fa3-78da-a667-6dca772763d0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019b0de5-7fa3-7402-9eb3-0a73fcd9eae0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_019b0de5-7fa3-7ea9-a0a9-c56fb3efed4b" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019b0de5-7fa3-7402-9eb3-0a73fcd9eae0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019b0de5-7fa3-70fb-9e48-b7af9852e068" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/CONSOLIDATEDINVESTMENTPRODUCTSFairValueMeasurementsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#CONSOLIDATEDINVESTMENTPRODUCTSFairValueMeasurementsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/CONSOLIDATEDINVESTMENTPRODUCTSFairValueMeasurementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7fa3-7aa8-b3b4-a456008c3710" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7fa3-7471-b8a4-518745d454d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7fa3-7aa8-b3b4-a456008c3710" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7fa3-7471-b8a4-518745d454d9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019b0de5-7fa3-7312-b43a-d2ebfefa3ffb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7fa3-7471-b8a4-518745d454d9" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019b0de5-7fa3-7312-b43a-d2ebfefa3ffb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019b0de5-7fa3-7312-b43a-d2ebfefa3ffb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019b0de5-7fa3-7312-b43a-d2ebfefa3ffb" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019b0de5-7fa3-7312-b43a-d2ebfefa3ffb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019b0de5-7fa3-7f2a-94a7-5eab724605af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019b0de5-7fa3-7312-b43a-d2ebfefa3ffb" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019b0de5-7fa3-7f2a-94a7-5eab724605af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_019b0de5-7fa3-7244-be5f-af287a07da47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019b0de5-7fa3-7f2a-94a7-5eab724605af" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_019b0de5-7fa3-7244-be5f-af287a07da47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7fa3-7230-86fd-251e09af0aa2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7fa3-7471-b8a4-518745d454d9" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7fa3-7230-86fd-251e09af0aa2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7fa3-7230-86fd-251e09af0aa2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7fa3-7230-86fd-251e09af0aa2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7fa3-7230-86fd-251e09af0aa2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7fa3-7b51-a3ec-586e3f327286" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019b0de5-7fa3-7230-86fd-251e09af0aa2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7fa3-7b51-a3ec-586e3f327286" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019b0de5-7fa3-7031-aa44-0efdb76ffe57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7fa3-7b51-a3ec-586e3f327286" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019b0de5-7fa3-7031-aa44-0efdb76ffe57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019b0de5-7fa3-7896-93bf-0c3c20423721" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019b0de5-7fa3-7b51-a3ec-586e3f327286" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019b0de5-7fa3-7896-93bf-0c3c20423721" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-7f7b-b98f-779a9c78c3dc" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019b0de5-7fa3-7471-b8a4-518745d454d9" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-7f7b-b98f-779a9c78c3dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-7f7b-b98f-779a9c78c3dc_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-7f7b-b98f-779a9c78c3dc" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-7f7b-b98f-779a9c78c3dc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-79a0-8471-7d6dfc7760f4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa3-7f7b-b98f-779a9c78c3dc" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-79a0-8471-7d6dfc7760f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7fa3-7639-96b6-a26ea0fab3e9" xlink:href="trow-20251231.xsd#trow_ConsolidatedInvestmentPortfoliosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa3-79a0-8471-7d6dfc7760f4" xlink:to="loc_trow_ConsolidatedInvestmentPortfoliosMember_019b0de5-7fa3-7639-96b6-a26ea0fab3e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019b0de5-7fa3-7d16-a458-07a0bfa55ff1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7fa3-7aa8-b3b4-a456008c3710" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019b0de5-7fa3-7d16-a458-07a0bfa55ff1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_019b0de5-7fa3-7a8f-89ff-3123007b4637" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7fa3-7aa8-b3b4-a456008c3710" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_019b0de5-7fa3-7a8f-89ff-3123007b4637" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019b0de5-7fa3-7aa6-9d73-f2613e559f00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7fa3-7aa8-b3b4-a456008c3710" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019b0de5-7fa3-7aa6-9d73-f2613e559f00" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestments_019b0de5-7fa3-724b-b5d7-963137cdc4c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7fa3-7aa8-b3b4-a456008c3710" xlink:to="loc_us-gaap_OtherInvestments_019b0de5-7fa3-724b-b5d7-963137cdc4c2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019b0de5-7fa3-7d51-ae1c-360acf88109c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7fa3-7aa8-b3b4-a456008c3710" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019b0de5-7fa3-7d51-ae1c-360acf88109c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019b0de5-7fa3-799d-ba36-1de4679b1b17" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019b0de5-7fa3-7aa8-b3b4-a456008c3710" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_019b0de5-7fa3-799d-ba36-1de4679b1b17" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/PROPERTYEQUIPMENTANDSOFTWAREScheduleofPropertyPlantandSoftwareDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#PROPERTYEQUIPMENTANDSOFTWAREScheduleofPropertyPlantandSoftwareDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/PROPERTYEQUIPMENTANDSOFTWAREScheduleofPropertyPlantandSoftwareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7fa3-7448-ab9f-2423c5184416" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b0de5-7fa3-736d-b4e7-59a3a5fbd6dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7fa3-7448-ab9f-2423c5184416" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b0de5-7fa3-736d-b4e7-59a3a5fbd6dd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7fa3-7137-a83d-ba076a400fec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b0de5-7fa3-736d-b4e7-59a3a5fbd6dd" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7fa3-7137-a83d-ba076a400fec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-7137-a83d-ba076a400fec_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7fa3-7137-a83d-ba076a400fec" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-7137-a83d-ba076a400fec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-79a5-8f28-7197fc898b23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7fa3-7137-a83d-ba076a400fec" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-79a5-8f28-7197fc898b23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ComputerAndCommunicationsSoftwareAndEquipmentMember_019b0de5-7fa3-7c76-af0c-96f1ce2c86ef" xlink:href="trow-20251231.xsd#trow_ComputerAndCommunicationsSoftwareAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-79a5-8f28-7197fc898b23" xlink:to="loc_trow_ComputerAndCommunicationsSoftwareAndEquipmentMember_019b0de5-7fa3-7c76-af0c-96f1ce2c86ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_019b0de5-7fa3-7b0c-b60e-211fc0d4c41e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-79a5-8f28-7197fc898b23" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_019b0de5-7fa3-7b0c-b60e-211fc0d4c41e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_019b0de5-7fa3-7f81-8840-0e96f7657a2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-79a5-8f28-7197fc898b23" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_019b0de5-7fa3-7f81-8840-0e96f7657a2e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_019b0de5-7fa3-7ea9-85ac-5305669b2967" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-79a5-8f28-7197fc898b23" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_019b0de5-7fa3-7ea9-85ac-5305669b2967" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_019b0de5-7fa3-7d75-a6d5-395f13d34f51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-79a5-8f28-7197fc898b23" xlink:to="loc_us-gaap_LandMember_019b0de5-7fa3-7d75-a6d5-395f13d34f51" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019b0de5-7fa3-725e-a612-7511d39b6a09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7fa3-7448-ab9f-2423c5184416" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019b0de5-7fa3-725e-a612-7511d39b6a09" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019b0de5-7fa3-707f-8aa5-373bc4fcfde6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7fa3-7448-ab9f-2423c5184416" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019b0de5-7fa3-707f-8aa5-373bc4fcfde6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019b0de5-7fa3-78af-9fc6-1dc8a2462f41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7fa3-7448-ab9f-2423c5184416" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019b0de5-7fa3-78af-9fc6-1dc8a2462f41" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/PROPERTYEQUIPMENTANDSOFTWARENarrativeDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#PROPERTYEQUIPMENTANDSOFTWARENarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/PROPERTYEQUIPMENTANDSOFTWARENarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7fa3-7a15-ba11-fd00caf2f3da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b0de5-7fa3-7d7f-b7a3-ab23eb2551cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7fa3-7a15-ba11-fd00caf2f3da" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b0de5-7fa3-7d7f-b7a3-ab23eb2551cc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7fa3-78df-aafe-809a5f6e11f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b0de5-7fa3-7d7f-b7a3-ab23eb2551cc" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7fa3-78df-aafe-809a5f6e11f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-78df-aafe-809a5f6e11f7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7fa3-78df-aafe-809a5f6e11f7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-78df-aafe-809a5f6e11f7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-7994-a0b2-c4f22cbfffc2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019b0de5-7fa3-78df-aafe-809a5f6e11f7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-7994-a0b2-c4f22cbfffc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_019b0de5-7fa3-73a8-8931-93cf1e49caed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019b0de5-7fa3-7994-a0b2-c4f22cbfffc2" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_019b0de5-7fa3-73a8-8931-93cf1e49caed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019c12cf-25cb-73eb-ad79-8e49ca1c5167" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019b0de5-7fa3-7d7f-b7a3-ab23eb2551cc" xlink:to="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019c12cf-25cb-73eb-ad79-8e49ca1c5167" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019c12cf-25cb-73eb-ad79-8e49ca1c5167_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongLivedAssetsHeldForSaleNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019c12cf-25cb-73eb-ad79-8e49ca1c5167" xlink:to="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019c12cf-25cb-73eb-ad79-8e49ca1c5167_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019c12cf-25cb-784e-8418-ee213c09e1f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongLivedAssetsHeldForSaleNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019c12cf-25cb-73eb-ad79-8e49ca1c5167" xlink:to="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019c12cf-25cb-784e-8418-ee213c09e1f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_019c12cf-25cb-7775-b578-daa343aba6a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019c12cf-25cb-784e-8418-ee213c09e1f0" xlink:to="loc_us-gaap_BuildingMember_019c12cf-25cb-7775-b578-daa343aba6a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAdditions_019b0de5-7fa3-7937-8b61-a15fbfc2c2db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7fa3-7a15-ba11-fd00caf2f3da" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAdditions_019b0de5-7fa3-7937-8b61-a15fbfc2c2db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_NumberOfBuildingsToBeDisposedOf_019c12d0-c686-7373-a46c-6f4d4a6d90aa" xlink:href="trow-20251231.xsd#trow_NumberOfBuildingsToBeDisposedOf"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7fa3-7a15-ba11-fd00caf2f3da" xlink:to="loc_trow_NumberOfBuildingsToBeDisposedOf_019c12d0-c686-7373-a46c-6f4d4a6d90aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019c12cd-ff74-7c27-9924-722cebca1f1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7fa3-7a15-ba11-fd00caf2f3da" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019c12cd-ff74-7c27-9924-722cebca1f1d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_019c12d0-c686-789d-92b7-be4f720b6883" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019b0de5-7fa3-7a15-ba11-fd00caf2f3da" xlink:to="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_019c12d0-c686-789d-92b7-be4f720b6883" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/GOODWILLANDINTANGIBLEASSETSGoodwillandIntangibleAssetsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#GOODWILLANDINTANGIBLEASSETSGoodwillandIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/GOODWILLANDINTANGIBLEASSETSGoodwillandIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems_019b0de5-7fa3-77ba-9bf7-823406242556" xlink:href="trow-20251231.xsd#trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillTable_019b0de5-7fa3-7068-a04d-5f4907558258" xlink:href="trow-20251231.xsd#trow_ScheduleOfIntangibleAssetsAndGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems_019b0de5-7fa3-77ba-9bf7-823406242556" xlink:to="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillTable_019b0de5-7fa3-7068-a04d-5f4907558258" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7093-82e0-e63b7f13110c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillTable_019b0de5-7fa3-7068-a04d-5f4907558258" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7093-82e0-e63b7f13110c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7093-82e0-e63b7f13110c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7093-82e0-e63b7f13110c" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7093-82e0-e63b7f13110c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7ddb-8387-4d9b801dee80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7093-82e0-e63b7f13110c" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7ddb-8387-4d9b801dee80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019b0de5-7fa3-73d7-9b91-053ac20de433" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7ddb-8387-4d9b801dee80" xlink:to="loc_us-gaap_TradeNamesMember_019b0de5-7fa3-73d7-9b91-053ac20de433" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-748c-bea6-04a73cabe454" xlink:href="trow-20251231.xsd#trow_InvestmentAdvisoryAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7ddb-8387-4d9b801dee80" xlink:to="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-748c-bea6-04a73cabe454" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7f19-b9f1-b47957e215b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillTable_019b0de5-7fa3-7068-a04d-5f4907558258" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7f19-b9f1-b47957e215b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7f19-b9f1-b47957e215b6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7f19-b9f1-b47957e215b6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7f19-b9f1-b47957e215b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-738f-80f1-95e43f2910cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7f19-b9f1-b47957e215b6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-738f-80f1-95e43f2910cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-7370-89ed-6bf155836a2b" xlink:href="trow-20251231.xsd#trow_InvestmentAdvisoryAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-738f-80f1-95e43f2910cd" xlink:to="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-7370-89ed-6bf155836a2b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019b0de5-7fa3-736d-adb7-d40577a9b844" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems_019b0de5-7fa3-77ba-9bf7-823406242556" xlink:to="loc_us-gaap_Goodwill_019b0de5-7fa3-736d-adb7-d40577a9b844" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019b0de5-7fa3-7b13-a6dc-bf2638ffb466" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems_019b0de5-7fa3-77ba-9bf7-823406242556" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019b0de5-7fa3-7b13-a6dc-bf2638ffb466" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019b0de5-7fa3-7f64-85b6-9204132b34e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems_019b0de5-7fa3-77ba-9bf7-823406242556" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019b0de5-7fa3-7f64-85b6-9204132b34e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_019b0de5-7fa3-7c7c-a8c7-c94c6b35d2d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems_019b0de5-7fa3-77ba-9bf7-823406242556" xlink:to="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_019b0de5-7fa3-7c7c-a8c7-c94c6b35d2d2" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/GOODWILLANDINTANGIBLEASSETSNarrativeDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#GOODWILLANDINTANGIBLEASSETSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/GOODWILLANDINTANGIBLEASSETSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019b0de5-7fa3-7c48-8eca-404b5c34ccb0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_019b0de5-7fa3-76f9-999a-26278c358f6f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019b0de5-7fa3-7c48-8eca-404b5c34ccb0" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_019b0de5-7fa3-76f9-999a-26278c358f6f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-78bd-bd0b-08119fc40859" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_019b0de5-7fa3-76f9-999a-26278c358f6f" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-78bd-bd0b-08119fc40859" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-78bd-bd0b-08119fc40859_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-78bd-bd0b-08119fc40859" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-78bd-bd0b-08119fc40859_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-70ce-bb01-162db6c53cb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-78bd-bd0b-08119fc40859" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-70ce-bb01-162db6c53cb8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-7962-90f6-df9e6af81692" xlink:href="trow-20251231.xsd#trow_InvestmentAdvisoryAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-70ce-bb01-162db6c53cb8" xlink:to="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-7962-90f6-df9e6af81692" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019b0de5-7fa3-7456-85f6-427e05f0b3dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-70ce-bb01-162db6c53cb8" xlink:to="loc_us-gaap_TradeNamesMember_019b0de5-7fa3-7456-85f6-427e05f0b3dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b9098-28ac-72ca-88ae-ce6d57242653" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_019b0de5-7fa3-76f9-999a-26278c358f6f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b9098-28ac-72ca-88ae-ce6d57242653" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b9098-28ac-72ca-88ae-ce6d57242653_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b9098-28ac-72ca-88ae-ce6d57242653" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b9098-28ac-72ca-88ae-ce6d57242653_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b9098-28ac-72bf-9b12-089946ae7699" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b9098-28ac-72ca-88ae-ce6d57242653" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b9098-28ac-72bf-9b12-089946ae7699" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentAdvisoryAgreementsMember_019b9098-28ac-79f8-8a98-4673fab8f36c" xlink:href="trow-20251231.xsd#trow_InvestmentAdvisoryAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b9098-28ac-72bf-9b12-089946ae7699" xlink:to="loc_trow_InvestmentAdvisoryAgreementsMember_019b9098-28ac-79f8-8a98-4673fab8f36c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_019c12df-71f8-7edf-8dad-ff937f40d5e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019b0de5-7fa3-7c48-8eca-404b5c34ccb0" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_019c12df-71f8-7edf-8dad-ff937f40d5e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_019b0de5-7fa3-7025-8b9a-a70a2219f782" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019b0de5-7fa3-7c48-8eca-404b5c34ccb0" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_019b0de5-7fa3-7025-8b9a-a70a2219f782" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019b0de5-7fa3-766e-9b57-bbb3167ac51a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019b0de5-7fa3-7c48-8eca-404b5c34ccb0" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019b0de5-7fa3-766e-9b57-bbb3167ac51a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetIndefiniteLivedExcludingGoodwillStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_019c52a6-8c32-7fcc-8204-469a56627fa9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ImpairmentOfIntangibleAssetIndefiniteLivedExcludingGoodwillStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019b0de5-7fa3-7c48-8eca-404b5c34ccb0" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetIndefiniteLivedExcludingGoodwillStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_019c52a6-8c32-7fcc-8204-469a56627fa9" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/GOODWILLANDINTANGIBLEASSETSIntangibleAssetsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#GOODWILLANDINTANGIBLEASSETSIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/GOODWILLANDINTANGIBLEASSETSIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems_019b0de5-7fa3-7eea-b94c-c7c320edb282" xlink:href="trow-20251231.xsd#trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillTable_019b0de5-7fa3-7efa-80e3-245d5e9ae4da" xlink:href="trow-20251231.xsd#trow_ScheduleOfIntangibleAssetsAndGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems_019b0de5-7fa3-7eea-b94c-c7c320edb282" xlink:to="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillTable_019b0de5-7fa3-7efa-80e3-245d5e9ae4da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-75f5-9798-596edf12a4bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillTable_019b0de5-7fa3-7efa-80e3-245d5e9ae4da" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-75f5-9798-596edf12a4bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-75f5-9798-596edf12a4bf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-75f5-9798-596edf12a4bf" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-75f5-9798-596edf12a4bf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7ecc-a306-895e0dd29474" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-75f5-9798-596edf12a4bf" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7ecc-a306-895e0dd29474" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-77c3-8f19-867ed9c6f0df" xlink:href="trow-20251231.xsd#trow_InvestmentAdvisoryAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7ecc-a306-895e0dd29474" xlink:to="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-77c3-8f19-867ed9c6f0df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7a5e-bdf4-165f93c5b449" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillTable_019b0de5-7fa3-7efa-80e3-245d5e9ae4da" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7a5e-bdf4-165f93c5b449" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7a5e-bdf4-165f93c5b449_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7a5e-bdf4-165f93c5b449" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7a5e-bdf4-165f93c5b449_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-743e-bd54-ca8762b7e4d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7a5e-bdf4-165f93c5b449" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-743e-bd54-ca8762b7e4d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-7a04-bd59-3985f1ef91fd" xlink:href="trow-20251231.xsd#trow_InvestmentAdvisoryAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-743e-bd54-ca8762b7e4d4" xlink:to="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-7a04-bd59-3985f1ef91fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_019b0de5-7fa3-7cb6-8567-3ac4a49e4068" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems_019b0de5-7fa3-7eea-b94c-c7c320edb282" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_019b0de5-7fa3-7cb6-8567-3ac4a49e4068" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019b0de5-7fa3-74ec-abcf-4fcb3f77c9d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_019b0de5-7fa3-7cb6-8567-3ac4a49e4068" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019b0de5-7fa3-74ec-abcf-4fcb3f77c9d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019b0de5-7fa3-7635-a3fb-f22acd2269f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_019b0de5-7fa3-7cb6-8567-3ac4a49e4068" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019b0de5-7fa3-7635-a3fb-f22acd2269f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019b0de5-7fa3-74f9-9472-cd8433be0c15" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_019b0de5-7fa3-7cb6-8567-3ac4a49e4068" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019b0de5-7fa3-74f9-9472-cd8433be0c15" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract_019b0de5-7fa3-7a18-8175-74c227385d0f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_ScheduleOfIntangibleAssetsAndGoodwillLineItems_019b0de5-7fa3-7eea-b94c-c7c320edb282" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract_019b0de5-7fa3-7a18-8175-74c227385d0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019b0de5-7fa3-71d6-84d3-03e01c8fa0fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract_019b0de5-7fa3-7a18-8175-74c227385d0f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019b0de5-7fa3-71d6-84d3-03e01c8fa0fd" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/GOODWILLANDINTANGIBLEASSETSAmortizationExpenseDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#GOODWILLANDINTANGIBLEASSETSAmortizationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/GOODWILLANDINTANGIBLEASSETSAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b0de5-7fa3-7ef0-a255-36afcb7b96d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019b0de5-7fa3-7be4-baa8-859f57c229c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b0de5-7fa3-7ef0-a255-36afcb7b96d3" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019b0de5-7fa3-7be4-baa8-859f57c229c6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7366-93e2-693cbc40dab3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019b0de5-7fa3-7be4-baa8-859f57c229c6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7366-93e2-693cbc40dab3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7366-93e2-693cbc40dab3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7366-93e2-693cbc40dab3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7366-93e2-693cbc40dab3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7bf9-928f-792b9a52887f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019b0de5-7fa3-7366-93e2-693cbc40dab3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7bf9-928f-792b9a52887f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-70af-a817-7f6083065f38" xlink:href="trow-20251231.xsd#trow_InvestmentAdvisoryAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019b0de5-7fa3-7bf9-928f-792b9a52887f" xlink:to="loc_trow_InvestmentAdvisoryAgreementsMember_019b0de5-7fa3-70af-a817-7f6083065f38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019b0de5-7fa3-7ab4-b51f-f2d5426c8fc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b0de5-7fa3-7ef0-a255-36afcb7b96d3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019b0de5-7fa3-7ab4-b51f-f2d5426c8fc7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019b0de5-7fa3-7e06-9f7a-e4bf3588f291" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b0de5-7fa3-7ef0-a255-36afcb7b96d3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019b0de5-7fa3-7e06-9f7a-e4bf3588f291" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019b0de5-7fa3-7b5a-87c6-635fabb3d273" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b0de5-7fa3-7ef0-a255-36afcb7b96d3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019b0de5-7fa3-7b5a-87c6-635fabb3d273" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019b0de5-7fa3-7aa5-9604-7652c4e1dcb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b0de5-7fa3-7ef0-a255-36afcb7b96d3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019b0de5-7fa3-7aa5-9604-7652c4e1dcb4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_FiniteLivedIntangibleAssetExpectedAmortizationFourYearAndAfter_019c370d-cccd-7af7-98ad-4383fc7b312d" xlink:href="trow-20251231.xsd#trow_FiniteLivedIntangibleAssetExpectedAmortizationFourYearAndAfter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b0de5-7fa3-7ef0-a255-36afcb7b96d3" xlink:to="loc_trow_FiniteLivedIntangibleAssetExpectedAmortizationFourYearAndAfter_019c370d-cccd-7af7-98ad-4383fc7b312d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019c36f9-161e-7155-b13b-87fbcf103cce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019b0de5-7fa3-7ef0-a255-36afcb7b96d3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019c36f9-161e-7155-b13b-87fbcf103cce" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/INCOMETAXESEffectiveIncomeTaxRateReconciliationDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#INCOMETAXESEffectiveIncomeTaxRateReconciliationDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/INCOMETAXESEffectiveIncomeTaxRateReconciliationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019b22ab-e478-7899-9686-cf0e5b698efb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_019b22ab-e478-7d97-afe8-acbeefffbd07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019b22ab-e478-7899-9686-cf0e5b698efb" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_019b22ab-e478-7d97-afe8-acbeefffbd07" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_019b22ab-e478-72e3-8c2d-de2b7cbb0074" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_019b22ab-e478-7d97-afe8-acbeefffbd07" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_019b22ab-e478-72e3-8c2d-de2b7cbb0074" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019b22ab-e478-72e3-8c2d-de2b7cbb0074_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019b22ab-e478-72e3-8c2d-de2b7cbb0074" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019b22ab-e478-72e3-8c2d-de2b7cbb0074_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019b22ab-e478-744b-83cd-3c90b02a61f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019b22ab-e478-72e3-8c2d-de2b7cbb0074" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019b22ab-e478-744b-83cd-3c90b02a61f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_019b22ac-4ca7-7667-870c-b05fec1679b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019b22ab-e478-744b-83cd-3c90b02a61f6" xlink:to="loc_us-gaap_ForeignCountryMember_019b22ac-4ca7-7667-870c-b05fec1679b0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_GB_019b22ab-e478-780d-a85b-e228dfa6c489" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_GB"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignCountryMember_019b22ac-4ca7-7667-870c-b05fec1679b0" xlink:to="loc_country_GB_019b22ab-e478-780d-a85b-e228dfa6c489" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019b22ad-01ec-73cf-9638-44f824c20205" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019b22ab-e478-7899-9686-cf0e5b698efb" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019b22ad-01ec-73cf-9638-44f824c20205" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_019b22ab-e478-715a-977c-f7acfbd6e5f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019b22ad-01ec-73cf-9638-44f824c20205" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_019b22ab-e478-715a-977c-f7acfbd6e5f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense_019b22ab-e478-7186-bb56-d1738bc0ae48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019b22ad-01ec-73cf-9638-44f824c20205" xlink:to="loc_us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense_019b22ab-e478-7186-bb56-d1738bc0ae48" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_019b22ab-e478-70e8-a7e9-9b54606de617" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019b22ad-01ec-73cf-9638-44f824c20205" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_019b22ab-e478-70e8-a7e9-9b54606de617" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_019bff13-5003-7681-b400-f5e97a0e821e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019b22ad-01ec-73cf-9638-44f824c20205" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_019bff13-5003-7681-b400-f5e97a0e821e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_019b22ab-e478-725d-ba94-b89d342640b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019b22ad-01ec-73cf-9638-44f824c20205" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_019b22ab-e478-725d-ba94-b89d342640b1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019b22ab-e478-7338-8c61-b81d70aac600" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019b22ad-01ec-73cf-9638-44f824c20205" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019b22ab-e478-7338-8c61-b81d70aac600" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_019c4417-183a-78e5-9596-61a9775228d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019b22ad-01ec-73cf-9638-44f824c20205" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_019c4417-183a-78e5-9596-61a9775228d0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019b22ab-e478-7845-a615-1bd65142523e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019b22ad-01ec-73cf-9638-44f824c20205" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019b22ab-e478-7845-a615-1bd65142523e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019b22ad-5852-7e26-bcaa-a92bac268e4a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019b22ab-e478-7899-9686-cf0e5b698efb" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019b22ad-5852-7e26-bcaa-a92bac268e4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019b22ab-e478-751e-8f5a-80349fa016f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019b22ad-5852-7e26-bcaa-a92bac268e4a" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019b22ab-e478-751e-8f5a-80349fa016f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense_019b22ab-e478-75d1-9d44-9177921c00b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019b22ad-5852-7e26-bcaa-a92bac268e4a" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense_019b22ab-e478-75d1-9d44-9177921c00b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_019b904c-5798-7d37-bf53-d9ea01fa5e55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019b22ad-5852-7e26-bcaa-a92bac268e4a" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_019b904c-5798-7d37-bf53-d9ea01fa5e55" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019b22ab-e478-74eb-b2c9-91a8ba124f89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019b22ad-5852-7e26-bcaa-a92bac268e4a" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019b22ab-e478-74eb-b2c9-91a8ba124f89" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019b22ab-e478-71dc-8fef-b7f20d98ed0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019b22ad-5852-7e26-bcaa-a92bac268e4a" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019b22ab-e478-71dc-8fef-b7f20d98ed0b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_019b22ab-e478-7a9b-bb04-7db057dcf473" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019b22ad-5852-7e26-bcaa-a92bac268e4a" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_019b22ab-e478-7a9b-bb04-7db057dcf473" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019c4417-3e17-7ef2-b9ed-acb6d0394688" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019b22ad-5852-7e26-bcaa-a92bac268e4a" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019c4417-3e17-7ef2-b9ed-acb6d0394688" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b22ab-e478-7e47-af5e-44afdc1803eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019b22ad-5852-7e26-bcaa-a92bac268e4a" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b22ab-e478-7e47-af5e-44afdc1803eb" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONSharesAuthorizedforStockBasedCompensationProgramsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#LONGTERMINCENTIVECOMPENSATIONSharesAuthorizedforStockBasedCompensationProgramsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONSharesAuthorizedforStockBasedCompensationProgramsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa3-70d4-8c65-3e917d1125dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa3-7a4a-8ba6-49926f080e20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa3-70d4-8c65-3e917d1125dc" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa3-7a4a-8ba6-49926f080e20" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019b0de5-7fa3-7e26-a6ff-6c31daab06d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa3-7a4a-8ba6-49926f080e20" xlink:to="loc_us-gaap_AwardTypeAxis_019b0de5-7fa3-7e26-a6ff-6c31daab06d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa3-7e26-a6ff-6c31daab06d7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa3-7e26-a6ff-6c31daab06d7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa3-7e26-a6ff-6c31daab06d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa3-79a4-a32d-063528d30200" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa3-7e26-a6ff-6c31daab06d7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa3-79a4-a32d-063528d30200" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_019b0de5-7fa3-79a1-b83c-0c01a6e1bd63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa3-79a4-a32d-063528d30200" xlink:to="loc_us-gaap_StockCompensationPlanMember_019b0de5-7fa3-79a1-b83c-0c01a6e1bd63" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_019b0de5-7fa3-7b37-a4e1-d429f5b56579" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa3-79a4-a32d-063528d30200" xlink:to="loc_us-gaap_EmployeeStockMember_019b0de5-7fa3-7b37-a4e1-d429f5b56579" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019b0de5-7fa4-7104-b226-11b9a355a66e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa3-70d4-8c65-3e917d1125dc" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019b0de5-7fa4-7104-b226-11b9a355a66e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONStockOptionsNarrativeDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#LONGTERMINCENTIVECOMPENSATIONStockOptionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONStockOptionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-72b6-8bd9-e7fffb5def64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7d92-a2f0-d8639b369303" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-72b6-8bd9-e7fffb5def64" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7d92-a2f0-d8639b369303" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-753e-8464-3ad558cfc3ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7d92-a2f0-d8639b369303" xlink:to="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-753e-8464-3ad558cfc3ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-753e-8464-3ad558cfc3ec_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-753e-8464-3ad558cfc3ec" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-753e-8464-3ad558cfc3ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-71bc-9d3d-1ff733646854" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-753e-8464-3ad558cfc3ec" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-71bc-9d3d-1ff733646854" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019b0de5-7fa4-7561-9545-2efe5624fafe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-71bc-9d3d-1ff733646854" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019b0de5-7fa4-7561-9545-2efe5624fafe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c440c-15c7-7bda-93ba-fb14a0546393" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-71bc-9d3d-1ff733646854" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c440c-15c7-7bda-93ba-fb14a0546393" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019b0de5-7fa4-7e85-8db6-f944f90a8140" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-72b6-8bd9-e7fffb5def64" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019b0de5-7fa4-7e85-8db6-f944f90a8140" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019b0de5-7fa4-73a7-8571-f6c3bceaef30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-72b6-8bd9-e7fffb5def64" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019b0de5-7fa4-73a7-8571-f6c3bceaef30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019b0de5-7fa4-7c01-9ced-14391a1c24e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-72b6-8bd9-e7fffb5def64" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019b0de5-7fa4-7c01-9ced-14391a1c24e0" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONRestrictedSharesandStockUnitsDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#LONGTERMINCENTIVECOMPENSATIONRestrictedSharesandStockUnitsDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONRestrictedSharesandStockUnitsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-79db-9472-8daa5977cf11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7b0f-8679-dfe1d7ae9652" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-79db-9472-8daa5977cf11" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7b0f-8679-dfe1d7ae9652" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-7aba-a1d4-0c30369e57bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7b0f-8679-dfe1d7ae9652" xlink:to="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-7aba-a1d4-0c30369e57bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7aba-a1d4-0c30369e57bf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-7aba-a1d4-0c30369e57bf" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7aba-a1d4-0c30369e57bf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7349-abaa-01fe365267ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-7aba-a1d4-0c30369e57bf" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7349-abaa-01fe365267ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019b0de5-7fa4-74a9-ae6b-8d5d7eddf75f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7349-abaa-01fe365267ad" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019b0de5-7fa4-74a9-ae6b-8d5d7eddf75f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_019b0de5-7fa4-7379-9a7e-4d5b5870d319" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7b0f-8679-dfe1d7ae9652" xlink:to="loc_us-gaap_VestingAxis_019b0de5-7fa4-7379-9a7e-4d5b5870d319" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019b0de5-7fa4-7379-9a7e-4d5b5870d319_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_019b0de5-7fa4-7379-9a7e-4d5b5870d319" xlink:to="loc_us-gaap_VestingDomain_019b0de5-7fa4-7379-9a7e-4d5b5870d319_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019b0de5-7fa4-7270-8a7e-c2ccb939cbc3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_019b0de5-7fa4-7379-9a7e-4d5b5870d319" xlink:to="loc_us-gaap_VestingDomain_019b0de5-7fa4-7270-8a7e-c2ccb939cbc3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019b0de5-7fa4-7f1e-bd03-1ad66a50fe83" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019b0de5-7fa4-7270-8a7e-c2ccb939cbc3" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019b0de5-7fa4-7f1e-bd03-1ad66a50fe83" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019b0de5-7fa4-74f3-a01b-9a219c3b958f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-79db-9472-8daa5977cf11" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019b0de5-7fa4-74f3-a01b-9a219c3b958f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019b0de5-7fa4-7e4c-9816-a2ecb30f4012" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019b0de5-7fa4-74f3-a01b-9a219c3b958f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019b0de5-7fa4-7e4c-9816-a2ecb30f4012" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019b0de5-7fa4-7092-b9aa-809cdc94592f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019b0de5-7fa4-74f3-a01b-9a219c3b958f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019b0de5-7fa4-7092-b9aa-809cdc94592f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019b0de5-7fa4-7a4a-8bea-cba867062106" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019b0de5-7fa4-74f3-a01b-9a219c3b958f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019b0de5-7fa4-7a4a-8bea-cba867062106" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019b0de5-7fa4-7696-ba10-7f245d4739a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019b0de5-7fa4-74f3-a01b-9a219c3b958f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019b0de5-7fa4-7696-ba10-7f245d4739a8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019b0de5-7fa4-79e9-8927-8cdbcd743ecb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019b0de5-7fa4-776e-a5f4-26c554ec76b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-79db-9472-8daa5977cf11" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019b0de5-7fa4-776e-a5f4-26c554ec76b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019b0de5-7fa4-764c-b25c-101a32e660b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019b0de5-7fa4-776e-a5f4-26c554ec76b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019b0de5-7fa4-764c-b25c-101a32e660b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019b0de5-7fa4-73fd-b771-e1234c5c3d46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019b0de5-7fa4-776e-a5f4-26c554ec76b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019b0de5-7fa4-73fd-b771-e1234c5c3d46" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019b0de5-7fa4-77a9-b79d-d45b5a6402b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019b0de5-7fa4-776e-a5f4-26c554ec76b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019b0de5-7fa4-77a9-b79d-d45b5a6402b9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019b0de5-7fa4-7639-8da3-cd3d1aae6ffe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019b0de5-7fa4-776e-a5f4-26c554ec76b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019b0de5-7fa4-7639-8da3-cd3d1aae6ffe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019b0de5-7fa4-7eee-9814-81b88ecad5de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_019b0de5-7fa4-7fa5-9dec-108eb0eeda2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-79db-9472-8daa5977cf11" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_019b0de5-7fa4-7fa5-9dec-108eb0eeda2d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONRestrictedSharesandStockUnitsNarrativeDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#LONGTERMINCENTIVECOMPENSATIONRestrictedSharesandStockUnitsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONRestrictedSharesandStockUnitsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-74aa-afc7-b06803099f01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7cbf-bfdb-4e81879d883d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-74aa-afc7-b06803099f01" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7cbf-bfdb-4e81879d883d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-7ac4-be42-cec4abd7f117" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7cbf-bfdb-4e81879d883d" xlink:to="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-7ac4-be42-cec4abd7f117" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7ac4-be42-cec4abd7f117_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-7ac4-be42-cec4abd7f117" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7ac4-be42-cec4abd7f117_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7794-bedd-0b01c346b0a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-7ac4-be42-cec4abd7f117" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7794-bedd-0b01c346b0a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019b0de5-7fa4-72e2-9828-745ff0ee6768" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7794-bedd-0b01c346b0a9" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019b0de5-7fa4-72e2-9828-745ff0ee6768" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_RestrictedFundUnitsMember_019b21c0-15e6-7cb7-85f2-ab37016b5aa3" xlink:href="trow-20251231.xsd#trow_RestrictedFundUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7794-bedd-0b01c346b0a9" xlink:to="loc_trow_RestrictedFundUnitsMember_019b21c0-15e6-7cb7-85f2-ab37016b5aa3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_019b0de5-7fa4-7dad-b6d6-4d17dbb69ec0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7cbf-bfdb-4e81879d883d" xlink:to="loc_us-gaap_VestingAxis_019b0de5-7fa4-7dad-b6d6-4d17dbb69ec0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019b0de5-7fa4-7dad-b6d6-4d17dbb69ec0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_019b0de5-7fa4-7dad-b6d6-4d17dbb69ec0" xlink:to="loc_us-gaap_VestingDomain_019b0de5-7fa4-7dad-b6d6-4d17dbb69ec0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019b0de5-7fa4-7273-ba93-19403175883c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_019b0de5-7fa4-7dad-b6d6-4d17dbb69ec0" xlink:to="loc_us-gaap_VestingDomain_019b0de5-7fa4-7273-ba93-19403175883c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019b0de5-7fa4-71b9-b783-60f0c03b864c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019b0de5-7fa4-7273-ba93-19403175883c" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019b0de5-7fa4-71b9-b783-60f0c03b864c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019b21c3-46c0-7941-a519-df67f1fac4eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7cbf-bfdb-4e81879d883d" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019b21c3-46c0-7941-a519-df67f1fac4eb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019b21c3-46c0-7941-a519-df67f1fac4eb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019b21c3-46c0-7941-a519-df67f1fac4eb" xlink:to="loc_us-gaap_EquityComponentDomain_019b21c3-46c0-7941-a519-df67f1fac4eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019b21c3-46c0-729e-bee6-52fb9c03962f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019b21c3-46c0-7941-a519-df67f1fac4eb" xlink:to="loc_us-gaap_EquityComponentDomain_019b21c3-46c0-729e-bee6-52fb9c03962f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019b21c3-46c0-70d0-93b7-d4119710c91c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019b21c3-46c0-729e-bee6-52fb9c03962f" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019b21c3-46c0-70d0-93b7-d4119710c91c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019b0de5-7fa4-7d0c-a9ac-60b67446d21c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-74aa-afc7-b06803099f01" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019b0de5-7fa4-7d0c-a9ac-60b67446d21c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedPerformanceThresholdMetNumber_019b0de5-7fa4-75cc-9ac7-f55c193646fc" xlink:href="trow-20251231.xsd#trow_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedPerformanceThresholdMetNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-74aa-afc7-b06803099f01" xlink:to="loc_trow_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedPerformanceThresholdMetNumber_019b0de5-7fa4-75cc-9ac7-f55c193646fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019b21c3-46c0-7b50-bf0e-65fc070883f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-74aa-afc7-b06803099f01" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019b21c3-46c0-7b50-bf0e-65fc070883f2" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONRestrictedFundUnitsNarrativeDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#LONGTERMINCENTIVECOMPENSATIONRestrictedFundUnitsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONRestrictedFundUnitsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-7b5b-8553-d23b03294f5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7c7b-ac87-fa76c5a159f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-7b5b-8553-d23b03294f5f" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7c7b-ac87-fa76c5a159f2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-76fa-9bc1-ce2fef58c119" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019b0de5-7fa4-7c7b-ac87-fa76c5a159f2" xlink:to="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-76fa-9bc1-ce2fef58c119" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-76fa-9bc1-ce2fef58c119_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-76fa-9bc1-ce2fef58c119" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-76fa-9bc1-ce2fef58c119_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7395-ab47-d4dd43fad6e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-76fa-9bc1-ce2fef58c119" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7395-ab47-d4dd43fad6e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_RestrictedFundUnitsMember_019b0de5-7fa4-7f37-a305-402514227409" xlink:href="trow-20251231.xsd#trow_RestrictedFundUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7395-ab47-d4dd43fad6e6" xlink:to="loc_trow_RestrictedFundUnitsMember_019b0de5-7fa4-7f37-a305-402514227409" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019b0de5-7fa4-7bb8-b145-0b6980281de8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0de5-7fa4-7b5b-8553-d23b03294f5f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019b0de5-7fa4-7bb8-b145-0b6980281de8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONRestrictedFundUnitsLiabilityDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#LONGTERMINCENTIVECOMPENSATIONRestrictedFundUnitsLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/LONGTERMINCENTIVECOMPENSATIONRestrictedFundUnitsLiabilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsLineItems_019b0de5-7fa4-7579-8858-708b8983c5ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualShareBasedPaymentsTable_019b0de5-7fa4-7624-b0c2-cb124445df37" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualShareBasedPaymentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsLineItems_019b0de5-7fa4-7579-8858-708b8983c5ff" xlink:to="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualShareBasedPaymentsTable_019b0de5-7fa4-7624-b0c2-cb124445df37" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-75ca-b8b4-bbe1a903889a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualShareBasedPaymentsTable_019b0de5-7fa4-7624-b0c2-cb124445df37" xlink:to="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-75ca-b8b4-bbe1a903889a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-75ca-b8b4-bbe1a903889a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-75ca-b8b4-bbe1a903889a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-75ca-b8b4-bbe1a903889a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7776-b4f0-2db4be69ce9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019b0de5-7fa4-75ca-b8b4-bbe1a903889a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7776-b4f0-2db4be69ce9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_RestrictedFundUnitsMember_019b0de5-7fa4-7b71-a74c-bfdb2ab5b517" xlink:href="trow-20251231.xsd#trow_RestrictedFundUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0de5-7fa4-7776-b4f0-2db4be69ce9e" xlink:to="loc_trow_RestrictedFundUnitsMember_019b0de5-7fa4-7b71-a74c-bfdb2ab5b517" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-71a8-a230-b84e3bcef696" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsLineItems_019b0de5-7fa4-7579-8858-708b8983c5ff" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-71a8-a230-b84e3bcef696" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_019b0de5-7fa4-7383-8d61-e61d812fd20a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-71a8-a230-b84e3bcef696" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_019b0de5-7fa4-7383-8d61-e61d812fd20a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualAmortizationOfGrantDateValue_019b0de5-7fa4-72c2-8e77-706408a20649" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualAmortizationOfGrantDateValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-71a8-a230-b84e3bcef696" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualAmortizationOfGrantDateValue_019b0de5-7fa4-72c2-8e77-706408a20649" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualAmortizationOfAppreciationDepreciation_019b0de5-7fa4-718f-bc65-8216d04b89ee" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualAmortizationOfAppreciationDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-71a8-a230-b84e3bcef696" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualAmortizationOfAppreciationDepreciation_019b0de5-7fa4-718f-bc65-8216d04b89ee" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualForfeitures_019bfe2a-b2f1-77b9-a5f2-2eba7b76712d" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-71a8-a230-b84e3bcef696" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualForfeitures_019bfe2a-b2f1-77b9-a5f2-2eba7b76712d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualSettlements_019bfe34-e293-730d-bf0e-3b4bea26c5b4" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualSettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-71a8-a230-b84e3bcef696" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualSettlements_019bfe34-e293-730d-bf0e-3b4bea26c5b4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_019b0de5-7fa4-7fef-9662-6b89f3eec54d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/OTHERCOMPREHENSIVEINCOMEANDACCUMULATEDOTHERCOMPREHENSIVELOSSDeferredTaxBenefitsIncomeTaxesDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#OTHERCOMPREHENSIVEINCOMEANDACCUMULATEDOTHERCOMPREHENSIVELOSSDeferredTaxBenefitsIncomeTaxesDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/OTHERCOMPREHENSIVEINCOMEANDACCUMULATEDOTHERCOMPREHENSIVELOSSDeferredTaxBenefitsIncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019b0de5-7fa4-7995-a88c-1dad112d16d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019b0de5-7fa4-7ec9-b011-08529361a487" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019b0de5-7fa4-7995-a88c-1dad112d16d6" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019b0de5-7fa4-7ec9-b011-08529361a487" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7fa4-78fc-a14d-ee495b278566" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019b0de5-7fa4-7ec9-b011-08529361a487" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7fa4-78fc-a14d-ee495b278566" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019b0de5-7fa4-78fc-a14d-ee495b278566_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7fa4-78fc-a14d-ee495b278566" xlink:to="loc_us-gaap_EquityComponentDomain_019b0de5-7fa4-78fc-a14d-ee495b278566_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019b0de5-7fa4-74f1-8b59-c5db538ebacb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7fa4-78fc-a14d-ee495b278566" xlink:to="loc_us-gaap_EquityComponentDomain_019b0de5-7fa4-74f1-8b59-c5db538ebacb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019b0de5-7fa4-79de-adbe-411f6dfd50ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019b0de5-7fa4-74f1-8b59-c5db538ebacb" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019b0de5-7fa4-79de-adbe-411f6dfd50ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_019c1085-78a0-7f79-89da-0859ed7a2d28" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019b0de5-7fa4-7995-a88c-1dad112d16d6" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_019c1085-78a0-7f79-89da-0859ed7a2d28" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_019c1085-ce2b-7d26-9e8f-2fc651aaf49a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019b0de5-7fa4-7995-a88c-1dad112d16d6" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_019c1085-ce2b-7d26-9e8f-2fc651aaf49a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_019bb358-2c13-7b77-ab68-da9467814c6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019b0de5-7fa4-7995-a88c-1dad112d16d6" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_019bb358-2c13-7b77-ab68-da9467814c6b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/OTHERCOMPREHENSIVEINCOMEANDACCUMULATEDOTHERCOMPREHENSIVELOSSAccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#OTHERCOMPREHENSIVEINCOMEANDACCUMULATEDOTHERCOMPREHENSIVELOSSAccumulatedOtherComprehensiveIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/OTHERCOMPREHENSIVEINCOMEANDACCUMULATEDOTHERCOMPREHENSIVELOSSAccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019b0de5-7fa4-7348-88fa-9b71b2e4def0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019b0de5-7fa4-7c8e-a0e3-039023507f43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019b0de5-7fa4-7348-88fa-9b71b2e4def0" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019b0de5-7fa4-7c8e-a0e3-039023507f43" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7fa4-7015-8d80-8ac56598d047" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019b0de5-7fa4-7c8e-a0e3-039023507f43" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7fa4-7015-8d80-8ac56598d047" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019b0de5-7fa4-7015-8d80-8ac56598d047_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7fa4-7015-8d80-8ac56598d047" xlink:to="loc_us-gaap_EquityComponentDomain_019b0de5-7fa4-7015-8d80-8ac56598d047_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019b0de5-7fa4-7512-a9aa-6231d782fa0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019b0de5-7fa4-7015-8d80-8ac56598d047" xlink:to="loc_us-gaap_EquityComponentDomain_019b0de5-7fa4-7512-a9aa-6231d782fa0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019b0de5-7fa4-7c71-a450-7f2b43fc3246" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019b0de5-7fa4-7512-a9aa-6231d782fa0c" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019b0de5-7fa4-7c71-a450-7f2b43fc3246" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa4-776e-b65d-905d8582dc14" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019b0de5-7fa4-7c8e-a0e3-039023507f43" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa4-776e-b65d-905d8582dc14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa4-776e-b65d-905d8582dc14_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa4-776e-b65d-905d8582dc14" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa4-776e-b65d-905d8582dc14_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa4-7528-be45-dda54faddda6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019b0de5-7fa4-776e-b65d-905d8582dc14" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa4-7528-be45-dda54faddda6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvesteeMember_019b0de5-7fa4-7630-b53c-05bb9a57099a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvesteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa4-7528-be45-dda54faddda6" xlink:to="loc_us-gaap_EquityMethodInvesteeMember_019b0de5-7fa4-7630-b53c-05bb9a57099a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7fa4-7360-9ac3-d26895ba62a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019b0de5-7fa4-7528-be45-dda54faddda6" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019b0de5-7fa4-7360-9ac3-d26895ba62a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019b0de5-7fa4-7858-adb0-7c6516b776de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019b0de5-7fa4-7348-88fa-9b71b2e4def0" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019b0de5-7fa4-7858-adb0-7c6516b776de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019b0de5-7fa4-7382-9716-c960e784ba22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019b0de5-7fa4-7858-adb0-7c6516b776de" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019b0de5-7fa4-7382-9716-c960e784ba22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_019b0de5-7fa4-7cba-881e-e868bb65529b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019b0de5-7fa4-7858-adb0-7c6516b776de" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_019b0de5-7fa4-7cba-881e-e868bb65529b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_019bb35f-4ad5-7c66-8577-ba3f83cadde2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019b0de5-7fa4-7858-adb0-7c6516b776de" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_019bb35f-4ad5-7c66-8577-ba3f83cadde2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_019bb361-bf79-7d79-876e-f60678f97a5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019b0de5-7fa4-7858-adb0-7c6516b776de" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_019bb361-bf79-7d79-876e-f60678f97a5d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_019b0de5-7fa4-7584-947c-ff2c83da705c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019b0de5-7fa4-7858-adb0-7c6516b776de" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_019b0de5-7fa4-7584-947c-ff2c83da705c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019b0de5-7fa4-7f24-a12f-890a9dc8fe65" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019b0de5-7fa4-7858-adb0-7c6516b776de" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019b0de5-7fa4-7f24-a12f-890a9dc8fe65" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019b0de5-7fa4-7f4f-a014-f2e388091fc8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/COMMITMENTSANDCONTINGENCIESDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#COMMITMENTSANDCONTINGENCIESDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/COMMITMENTSANDCONTINGENCIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_019b0de5-7fa4-75ae-9bb9-bea6617f04ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_019b0de5-7fa4-702a-bbd3-11ffbd7c41c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019b0de5-7fa4-75ae-9bb9-bea6617f04ec" xlink:to="loc_us-gaap_OtherCommitmentsTable_019b0de5-7fa4-702a-bbd3-11ffbd7c41c6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsAxis_019b0de5-7fa4-7011-a55a-d56cada45ea8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019b0de5-7fa4-702a-bbd3-11ffbd7c41c6" xlink:to="loc_us-gaap_OtherCommitmentsAxis_019b0de5-7fa4-7011-a55a-d56cada45ea8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_019b0de5-7fa4-7011-a55a-d56cada45ea8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherCommitmentsAxis_019b0de5-7fa4-7011-a55a-d56cada45ea8" xlink:to="loc_us-gaap_OtherCommitmentsDomain_019b0de5-7fa4-7011-a55a-d56cada45ea8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_019b0de5-7fa4-72d4-b7b2-7a2aa71e09b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherCommitmentsAxis_019b0de5-7fa4-7011-a55a-d56cada45ea8" xlink:to="loc_us-gaap_OtherCommitmentsDomain_019b0de5-7fa4-72d4-b7b2-7a2aa71e09b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_OHACommitmentsMember_019b0de5-7fa4-729d-a961-d08fd71b4e1a" xlink:href="trow-20251231.xsd#trow_OHACommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_019b0de5-7fa4-72d4-b7b2-7a2aa71e09b2" xlink:to="loc_trow_OHACommitmentsMember_019b0de5-7fa4-729d-a961-d08fd71b4e1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019b21eb-bec4-792e-9c59-d046da66924e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019b0de5-7fa4-702a-bbd3-11ffbd7c41c6" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019b21eb-bec4-792e-9c59-d046da66924e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b21eb-bec4-792e-9c59-d046da66924e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b21eb-bec4-792e-9c59-d046da66924e" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b21eb-bec4-792e-9c59-d046da66924e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b21eb-bec4-7086-b274-b3f2847cb12e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b21eb-bec4-792e-9c59-d046da66924e" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b21eb-bec4-7086-b274-b3f2847cb12e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_OHAAcquisitionMember_019b21eb-bec4-7f66-9f83-92995ae989d3" xlink:href="trow-20251231.xsd#trow_OHAAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b21eb-bec4-7086-b274-b3f2847cb12e" xlink:to="loc_trow_OHAAcquisitionMember_019b21eb-bec4-7f66-9f83-92995ae989d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitment_019b0de5-7fa4-7983-80bb-299aa8e06a8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019b0de5-7fa4-75ae-9bb9-bea6617f04ec" xlink:to="loc_us-gaap_OtherCommitment_019b0de5-7fa4-7983-80bb-299aa8e06a8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_019b21eb-bec4-7dec-bfd0-efe55613fc54" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019b0de5-7fa4-75ae-9bb9-bea6617f04ec" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_019b21eb-bec4-7dec-bfd0-efe55613fc54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_BusinessCombinationEarnoutPercentageSecondThreshold_019b21eb-bec4-7e3c-b3ea-cb97c6a461a6" xlink:href="trow-20251231.xsd#trow_BusinessCombinationEarnoutPercentageSecondThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019b0de5-7fa4-75ae-9bb9-bea6617f04ec" xlink:to="loc_trow_BusinessCombinationEarnoutPercentageSecondThreshold_019b21eb-bec4-7e3c-b3ea-cb97c6a461a6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019b21eb-bec4-7513-b590-ff7bffbf1171" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019b0de5-7fa4-75ae-9bb9-bea6617f04ec" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019b21eb-bec4-7513-b590-ff7bffbf1171" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_BusinessCombinationContingentConsiderationIncentivePaymentPercentage_019c1301-396d-7c1c-afc8-0d77ec7edecb" xlink:href="trow-20251231.xsd#trow_BusinessCombinationContingentConsiderationIncentivePaymentPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019b0de5-7fa4-75ae-9bb9-bea6617f04ec" xlink:to="loc_trow_BusinessCombinationContingentConsiderationIncentivePaymentPercentage_019c1301-396d-7c1c-afc8-0d77ec7edecb" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/OTHERDISCLOSURESNarrativeDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#OTHERDISCLOSURESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/OTHERDISCLOSURESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019b0de5-7fa4-7da0-8c15-9266b46286ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019b0de5-7fa4-7c3e-992f-a28f7e4a3308" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019b0de5-7fa4-7da0-8c15-9266b46286ea" xlink:to="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019b0de5-7fa4-7c3e-992f-a28f7e4a3308" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_019b0de5-7fa4-7e56-a791-3c4d967655ad" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019b0de5-7fa4-7c3e-992f-a28f7e4a3308" xlink:to="loc_srt_TitleOfIndividualAxis_019b0de5-7fa4-7e56-a791-3c4d967655ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7fa4-7e56-a791-3c4d967655ad_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_019b0de5-7fa4-7e56-a791-3c4d967655ad" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7fa4-7e56-a791-3c4d967655ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7fa4-7e79-bb2a-91dd62009f92" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_019b0de5-7fa4-7e56-a791-3c4d967655ad" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7fa4-7e79-bb2a-91dd62009f92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ExecutiveOfficerMember_019b0de5-7fa4-705b-8a8a-bf545167e4a2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7fa4-7e79-bb2a-91dd62009f92" xlink:to="loc_srt_ExecutiveOfficerMember_019b0de5-7fa4-705b-8a8a-bf545167e4a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019b0de5-7fa4-7b41-a7f6-db8d9c67a368" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019b0de5-7fa4-7c3e-992f-a28f7e4a3308" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019b0de5-7fa4-7b41-a7f6-db8d9c67a368" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019b0de5-7fa4-7b41-a7f6-db8d9c67a368_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019b0de5-7fa4-7b41-a7f6-db8d9c67a368" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019b0de5-7fa4-7b41-a7f6-db8d9c67a368_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019b0de5-7fa4-7ed6-8d06-f9b55e27fe08" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019b0de5-7fa4-7b41-a7f6-db8d9c67a368" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019b0de5-7fa4-7ed6-8d06-f9b55e27fe08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusMember_019b0de5-7fa4-77b3-9596-59a48dcd7c73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredBonusMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019b0de5-7fa4-7ed6-8d06-f9b55e27fe08" xlink:to="loc_us-gaap_DeferredBonusMember_019b0de5-7fa4-77b3-9596-59a48dcd7c73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_019b0de5-7fa4-7096-8fdd-796700799beb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019b0de5-7fa4-7da0-8c15-9266b46286ea" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_019b0de5-7fa4-7096-8fdd-796700799beb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementwithIndividualCashAwardsGrantedPercentageDeferred_019b0de5-7fa4-75eb-9de4-203e42650850" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementwithIndividualCashAwardsGrantedPercentageDeferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019b0de5-7fa4-7da0-8c15-9266b46286ea" xlink:to="loc_trow_DeferredCompensationArrangementwithIndividualCashAwardsGrantedPercentageDeferred_019b0de5-7fa4-75eb-9de4-203e42650850" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualCashAwardsGrantedAmountDeferred_019b0de5-7fa4-7df9-ac45-1efc7bebf5cc" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualCashAwardsGrantedAmountDeferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019b0de5-7fa4-7da0-8c15-9266b46286ea" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualCashAwardsGrantedAmountDeferred_019b0de5-7fa4-7df9-ac45-1efc7bebf5cc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualNumberOfAnnualInstallments_019b0de5-7fa4-7942-878e-78df30caa6d2" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualNumberOfAnnualInstallments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019b0de5-7fa4-7da0-8c15-9266b46286ea" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualNumberOfAnnualInstallments_019b0de5-7fa4-7942-878e-78df30caa6d2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualMinimumEmploymentPeriodForLumpSumPayment_019b0de5-7fa4-7c92-8914-3212be44fdb0" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualMinimumEmploymentPeriodForLumpSumPayment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019b0de5-7fa4-7da0-8c15-9266b46286ea" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualMinimumEmploymentPeriodForLumpSumPayment_019b0de5-7fa4-7c92-8914-3212be44fdb0" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.troweprice.com/role/OTHERDISCLOSURESScheduleofDeferredCompensationLiabilitiesDetails" xlink:type="simple" xlink:href="trow-20251231.xsd#OTHERDISCLOSURESScheduleofDeferredCompensationLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.troweprice.com/role/OTHERDISCLOSURESScheduleofDeferredCompensationLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019b0de5-7fa4-7284-bd69-dbec4faf7676" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019b0de5-7fa4-7e83-a376-7e9a168b08c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019b0de5-7fa4-7284-bd69-dbec4faf7676" xlink:to="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019b0de5-7fa4-7e83-a376-7e9a168b08c3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_019b0de5-7fa4-7c55-8000-bacf1d5fe321" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019b0de5-7fa4-7e83-a376-7e9a168b08c3" xlink:to="loc_srt_TitleOfIndividualAxis_019b0de5-7fa4-7c55-8000-bacf1d5fe321" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7fa4-7c55-8000-bacf1d5fe321_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_019b0de5-7fa4-7c55-8000-bacf1d5fe321" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7fa4-7c55-8000-bacf1d5fe321_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7fa4-7a06-b389-ad4219999a04" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_019b0de5-7fa4-7c55-8000-bacf1d5fe321" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7fa4-7a06-b389-ad4219999a04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ExecutiveOfficerMember_019b0de5-7fa4-71eb-a03f-c73e47197987" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0de5-7fa4-7a06-b389-ad4219999a04" xlink:to="loc_srt_ExecutiveOfficerMember_019b0de5-7fa4-71eb-a03f-c73e47197987" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019b0de5-7fa4-7357-a966-8d2895976b30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019b0de5-7fa4-7e83-a376-7e9a168b08c3" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019b0de5-7fa4-7357-a966-8d2895976b30" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019b0de5-7fa4-7357-a966-8d2895976b30_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019b0de5-7fa4-7357-a966-8d2895976b30" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019b0de5-7fa4-7357-a966-8d2895976b30_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019b0de5-7fa4-7ea3-887f-5441ac184772" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019b0de5-7fa4-7357-a966-8d2895976b30" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019b0de5-7fa4-7ea3-887f-5441ac184772" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusMember_019b0de5-7fa4-7ec9-9a7a-62e07e3b7d55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredBonusMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019b0de5-7fa4-7ea3-887f-5441ac184772" xlink:to="loc_us-gaap_DeferredBonusMember_019b0de5-7fa4-7ec9-9a7a-62e07e3b7d55" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-7616-b695-0cb78b616be1" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019b0de5-7fa4-7284-bd69-dbec4faf7676" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-7616-b695-0cb78b616be1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_019b0de5-7fa4-7628-af7a-ddd2f210a117" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-7616-b695-0cb78b616be1" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_019b0de5-7fa4-7628-af7a-ddd2f210a117" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualDeferralsIncludingTaxes_019b0de5-7fa4-70eb-9384-d3be580d6616" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualDeferralsIncludingTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-7616-b695-0cb78b616be1" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualDeferralsIncludingTaxes_019b0de5-7fa4-70eb-9384-d3be580d6616" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualMarketAppreciationDepreciation_019b0de5-7fa4-7f04-8588-e8eb2f5e8c9e" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualMarketAppreciationDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-7616-b695-0cb78b616be1" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualMarketAppreciationDepreciation_019b0de5-7fa4-7f04-8588-e8eb2f5e8c9e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trow_DeferredCompensationArrangementWithIndividualDistributions_019b0de5-7fa4-7b67-b7c5-a0b6b8f4993c" xlink:href="trow-20251231.xsd#trow_DeferredCompensationArrangementWithIndividualDistributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trow_DeferredCompensationArrangementWithIndividualShareBasedPaymentsRollForward_019b0de5-7fa4-7616-b695-0cb78b616be1" xlink:to="loc_trow_DeferredCompensationArrangementWithIndividualDistributions_019b0de5-7fa4-7b67-b7c5-a0b6b8f4993c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_019b0de5-7fa4-72a5-bfd7-d9c9340b0238" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfAcquisitionCosts" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfAcquisitionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_us-gaap_AmortizationOfAcquisitionCosts" xlink:type="arc" order="691"/>
  </link:definitionLink>
</link:linkbase>
