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    <link:label id="lab_ecd_TradingArrByIndTable_terseLabel_en-US" xlink:label="lab_ecd_TradingArrByIndTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading Arrangements, by Individual</link:label>
    <link:label id="lab_ecd_TradingArrByIndTable_label_en-US" xlink:label="lab_ecd_TradingArrByIndTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangements, by Individual [Table]</link:label>
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    <link:label id="lab_arcc_DriveCentricHoldingsLLCMember_019fed4d-3dd3-7b3e-93e8-652d3ccde21c_terseLabel_en-US" xlink:label="lab_arcc_DriveCentricHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DriveCentric Holdings, LLC</link:label>
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    <link:label id="lab_arcc_DriveCentricHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_DriveCentricHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">DriveCentric Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DriveCentricHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_DriveCentricHoldingsLLCMember"/>
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    <link:label id="lab_ecd_TradingArrAxis_label_en-US" xlink:label="lab_ecd_TradingArrAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TradingArrAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TradingArrAxis"/>
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    <link:label id="lab_us-gaap_SubordinatedDebt_019fed4d-3e55-7b80-a6d1-4fadcbf1aa31_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated notes</link:label>
    <link:label id="lab_us-gaap_SubordinatedDebt_label_en-US" xlink:label="lab_us-gaap_SubordinatedDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Debt</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedDebt" xlink:to="lab_us-gaap_SubordinatedDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MaximumMember_019fed4d-3dd3-7bc0-b4bb-3b4ec5cfadc0_terseLabel_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum</link:label>
    <link:label id="lab_srt_MaximumMember_label_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MaximumMember" xlink:to="lab_srt_MaximumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_019fed4d-3e56-7f24-bbfb-d583a0c07a53_terseLabel_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Portion at Fair Value Measurement</link:label>
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_label_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Portion at Fair Value Measurement [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:to="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AQSunshineIncMember_019fed4d-3dd3-7b5d-b3a4-7e2cf3d3971d_terseLabel_en-US" xlink:label="lab_arcc_AQSunshineIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AQ Sunshine, Inc.</link:label>
    <link:label id="lab_arcc_AQSunshineIncMember_label_en-US" xlink:label="lab_arcc_AQSunshineIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AQ Sunshine, Inc. [Member]</link:label>
    <link:label id="lab_arcc_AQSunshineIncMember_documentation_en-US" xlink:label="lab_arcc_AQSunshineIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">AQ Sunshine, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AQSunshineIncMember" xlink:href="arcc-20260930.xsd#arcc_AQSunshineIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AQSunshineIncMember" xlink:to="lab_arcc_AQSunshineIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_Security12bTitle_019fed4d-3dd3-7730-9bb4-4193c289f4e9_terseLabel_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:label id="lab_dei_Security12bTitle_label_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle" xlink:to="lab_dei_Security12bTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventMember_019fed4d-3e56-79d5-a59c-2d10a7bc5825_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event</link:label>
    <link:label id="lab_us-gaap_SubsequentEventMember_label_en-US" xlink:label="lab_us-gaap_SubsequentEventMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventMember" xlink:to="lab_us-gaap_SubsequentEventMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019fed4d-3dd3-7262-863f-a974c49614f0_terseLabel_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carrying value</link:label>
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_label_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reported Value Measurement [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:to="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember_019fed4d-3e56-759d-a608-980fe3e19969_terseLabel_en-US" xlink:label="lab_arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Napa Management Services Corporation and ASP NAPA Holdings, LLC</link:label>
    <link:label id="lab_arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Napa Management Services Corporation and ASP NAPA Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Napa Management Services Corporation and ASP NAPA Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember" xlink:to="lab_arcc_NapaManagementServicesCorporationAndASPNAPAHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019fed4d-3dd3-7d59-8c0c-ca14bb227442_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) [Table]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:to="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtWeightedAverageInterestRate_019fed4d-3d42-7da6-9560-89c6c3c9d0c0_terseLabel_en-US" xlink:label="lab_us-gaap_DebtWeightedAverageInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average stated interest rate</link:label>
    <link:label id="lab_us-gaap_DebtWeightedAverageInterestRate_label_en-US" xlink:label="lab_us-gaap_DebtWeightedAverageInterestRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt, Weighted Average Interest Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtWeightedAverageInterestRate" xlink:to="lab_us-gaap_DebtWeightedAverageInterestRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AdjToCompAmt_terseLabel_en-US" xlink:label="lab_ecd_AdjToCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation, Amount</link:label>
    <link:label id="lab_ecd_AdjToCompAmt_label_en-US" xlink:label="lab_ecd_AdjToCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AdjToCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AdjToCompAmt" xlink:to="lab_ecd_AdjToCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancialInstrumentAxis_019fed4d-3dd3-7979-99c1-5446340504cf_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancialInstrumentAxis_label_en-US" xlink:label="lab_us-gaap_FinancialInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Instrument [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentAxis" xlink:to="lab_us-gaap_FinancialInstrumentAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OPHNEPInvestmentLLCMember_019fed4d-3dd3-7d46-9ddd-45bb098f09b9_terseLabel_en-US" xlink:label="lab_arcc_OPHNEPInvestmentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OPH NEP Investment, LLC</link:label>
    <link:label id="lab_arcc_OPHNEPInvestmentLLCMember_label_en-US" xlink:label="lab_arcc_OPHNEPInvestmentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OPH NEP Investment, LLC [Member]</link:label>
    <link:label id="lab_arcc_OPHNEPInvestmentLLCMember_documentation_en-US" xlink:label="lab_arcc_OPHNEPInvestmentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OPH NEP Investment, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OPHNEPInvestmentLLCMember" xlink:href="arcc-20260930.xsd#arcc_OPHNEPInvestmentLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OPHNEPInvestmentLLCMember" xlink:to="lab_arcc_OPHNEPInvestmentLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentReportingAbstract_label_en-US" xlink:label="lab_us-gaap_SegmentReportingAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingAbstract" xlink:to="lab_us-gaap_SegmentReportingAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PayableInvestmentPurchase_019fed4d-3e56-7909-b6ad-e5a363b5a319_terseLabel_en-US" xlink:label="lab_us-gaap_PayableInvestmentPurchase" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payable for open trades</link:label>
    <link:label id="lab_us-gaap_PayableInvestmentPurchase_label_en-US" xlink:label="lab_us-gaap_PayableInvestmentPurchase" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payable, Investment, Purchase</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PayableInvestmentPurchase" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PayableInvestmentPurchase"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PayableInvestmentPurchase" xlink:to="lab_us-gaap_PayableInvestmentPurchase" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember_019fed4d-3dd3-7a7e-a15c-386a988d7516_terseLabel_en-US" xlink:label="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Absolute Dental Group LLC and Absolute Dental Equity, LLC</link:label>
    <link:label id="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember_label_en-US" xlink:label="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Absolute Dental Group LLC and Absolute Dental Equity, LLC [Member]</link:label>
    <link:label id="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember_documentation_en-US" xlink:label="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Absolute Dental Group LLC and Absolute Dental Equity, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember" xlink:href="arcc-20260930.xsd#arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember" xlink:to="lab_arcc_AbsoluteDentalGroupLLCAndAbsoluteDentalEquityLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2025M7DividendsMember_019fed4d-3d42-7497-b246-9362fe672940_terseLabel_en-US" xlink:label="lab_arcc_O2025M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 29, 2025</link:label>
    <link:label id="lab_arcc_O2025M7DividendsMember_label_en-US" xlink:label="lab_arcc_O2025M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2025 M7 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2025M7DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2025M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">O 2025 M7 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2025M7DividendsMember" xlink:href="arcc-20260930.xsd#arcc_O2025M7DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2025M7DividendsMember" xlink:to="lab_arcc_O2025M7DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember_019fed4d-3e56-74b1-bc36-8c872863300b_terseLabel_en-US" xlink:label="lab_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">RMS Holdco II, LLC &amp; RMS Group Holdings, Inc.</link:label>
    <link:label id="lab_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember_label_en-US" xlink:label="lab_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">RMS Holdco II, LLC &amp; RMS Group Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">RMS Holdco II, LLC &amp; RMS Group Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember" xlink:to="lab_arcc_RMSHoldcoIILLCRMSGroupHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_January2030NotesMember_019fed4d-3e56-76fb-9f0e-78006308f048_terseLabel_en-US" xlink:label="lab_arcc_January2030NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">January 2030 Notes</link:label>
    <link:label id="lab_arcc_January2030NotesMember_019fed4d-3e56-7ce1-8276-887075074fd0_verboseLabel_en-US" xlink:label="lab_arcc_January2030NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">January 2030 Notes (principal amount outstanding of $800 and $0, respectively)</link:label>
    <link:label id="lab_arcc_January2030NotesMember_label_en-US" xlink:label="lab_arcc_January2030NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">January 2030 Notes [Member]</link:label>
    <link:label id="lab_arcc_January2030NotesMember_documentation_en-US" xlink:label="lab_arcc_January2030NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">January 2030 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_January2030NotesMember" xlink:href="arcc-20260930.xsd#arcc_January2030NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_January2030NotesMember" xlink:to="lab_arcc_January2030NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ForeignCurrencyTransactionGainLossRealized_019fed4d-3d42-7f0e-81cc-b1f1d4afce8b_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency and other transactions</link:label>
    <link:label id="lab_us-gaap_ForeignCurrencyTransactionGainLossRealized_label_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Realized Gain (Loss), Foreign Currency Transaction, before Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignCurrencyTransactionGainLossRealized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:to="lab_us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AdonisBidcoInc.Member_019fed4d-3e56-764f-97e1-29015d759dbc_terseLabel_en-US" xlink:label="lab_arcc_AdonisBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adonis Bidco Inc.</link:label>
    <link:label id="lab_arcc_AdonisBidcoInc.Member_label_en-US" xlink:label="lab_arcc_AdonisBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adonis Bidco Inc. [Member]</link:label>
    <link:label id="lab_arcc_AdonisBidcoInc.Member_documentation_en-US" xlink:label="lab_arcc_AdonisBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Adonis Bidco Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AdonisBidcoInc.Member" xlink:href="arcc-20260930.xsd#arcc_AdonisBidcoInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AdonisBidcoInc.Member" xlink:to="lab_arcc_AdonisBidcoInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NatureOfExpenseAxis_019fed4d-3e56-727a-b69a-d613a849dfa3_terseLabel_en-US" xlink:label="lab_us-gaap_NatureOfExpenseAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nature of Expense [Axis]</link:label>
    <link:label id="lab_us-gaap_NatureOfExpenseAxis_label_en-US" xlink:label="lab_us-gaap_NatureOfExpenseAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nature of Expense [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NatureOfExpenseAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NatureOfExpenseAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NatureOfExpenseAxis" xlink:to="lab_us-gaap_NatureOfExpenseAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2026M2DividendsMember_019fed4d-3d42-7706-bff2-ca242220cda9_terseLabel_en-US" xlink:label="lab_arcc_O2026M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">February 4, 2026</link:label>
    <link:label id="lab_arcc_O2026M2DividendsMember_label_en-US" xlink:label="lab_arcc_O2026M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2026 M2 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2026M2DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2026M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">O 2026 M2 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2026M2DividendsMember" xlink:href="arcc-20260930.xsd#arcc_O2026M2DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2026M2DividendsMember" xlink:to="lab_arcc_O2026M2DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_019fed4d-3e56-7c05-a95e-79d8bdd9b128_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of investment</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale, Maturity and Collection of Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments" xlink:to="lab_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_019fed4d-3dd3-704f-97fc-69807085c716_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis" xlink:to="lab_us-gaap_DerivativeInstrumentRiskAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember_019fed4d-3d42-7797-a015-008529279f39_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-controlled affiliate company investments</link:label>
    <link:label id="lab_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember_label_en-US" xlink:label="lab_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Affiliated Issuer, Noncontrolled [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:to="lab_us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EquityInvestmentCommitmentsMember_019fed4d-3dd3-72c3-af43-0507405d1fd2_terseLabel_en-US" xlink:label="lab_arcc_EquityInvestmentCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity investment commitments</link:label>
    <link:label id="lab_arcc_EquityInvestmentCommitmentsMember_label_en-US" xlink:label="lab_arcc_EquityInvestmentCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Investment Commitments [Member]</link:label>
    <link:label id="lab_arcc_EquityInvestmentCommitmentsMember_documentation_en-US" xlink:label="lab_arcc_EquityInvestmentCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity Investment Commitments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EquityInvestmentCommitmentsMember" xlink:href="arcc-20260930.xsd#arcc_EquityInvestmentCommitmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EquityInvestmentCommitmentsMember" xlink:to="lab_arcc_EquityInvestmentCommitmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_January2027NotesMember_019fed4d-3d42-72ab-b6bc-10d115fa1649_verboseLabel_en-US" xlink:label="lab_arcc_January2027NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">January 2027 Notes</link:label>
    <link:label id="lab_arcc_January2027NotesMember_019fed4d-3d42-7614-96e4-fcb3a07107b9_terseLabel_en-US" xlink:label="lab_arcc_January2027NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">January 2027 Notes</link:label>
    <link:label id="lab_arcc_January2027NotesMember_019fed4d-3d42-734a-aa7f-aa528407cca3_netLabel_en-US" xlink:label="lab_arcc_January2027NotesMember" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US">January 2027 Notes (principal amount outstanding of $900)</link:label>
    <link:label id="lab_arcc_January2027NotesMember_label_en-US" xlink:label="lab_arcc_January2027NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">January 2027 Notes [Member]</link:label>
    <link:label id="lab_arcc_January2027NotesMember_documentation_en-US" xlink:label="lab_arcc_January2027NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">January 2027 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_January2027NotesMember" xlink:href="arcc-20260930.xsd#arcc_January2027NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_January2027NotesMember" xlink:to="lab_arcc_January2027NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ZincBuyerCorporationAndMarmicFireSafetyCo.Inc.Member_019fed4d-3dd3-7770-9887-af2cace93700_terseLabel_en-US" xlink:label="lab_arcc_ZincBuyerCorporationAndMarmicFireSafetyCo.Inc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Zinc Buyer Corporation and Marmic Fire &amp; Safety Co., Inc.</link:label>
    <link:label id="lab_arcc_ZincBuyerCorporationAndMarmicFireSafetyCo.Inc.Member_label_en-US" xlink:label="lab_arcc_ZincBuyerCorporationAndMarmicFireSafetyCo.Inc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Zinc Buyer Corporation and Marmic Fire &amp; Safety Co., Inc. [Member]</link:label>
    <link:label id="lab_arcc_ZincBuyerCorporationAndMarmicFireSafetyCo.Inc.Member_documentation_en-US" xlink:label="lab_arcc_ZincBuyerCorporationAndMarmicFireSafetyCo.Inc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Zinc Buyer Corporation and Marmic Fire &amp; Safety Co., Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ZincBuyerCorporationAndMarmicFireSafetyCo.Inc.Member" xlink:href="arcc-20260930.xsd#arcc_ZincBuyerCorporationAndMarmicFireSafetyCo.Inc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ZincBuyerCorporationAndMarmicFireSafetyCo.Inc.Member" xlink:to="lab_arcc_ZincBuyerCorporationAndMarmicFireSafetyCo.Inc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_019fed4d-3dd3-7617-99cb-0cffbed37e2c_terseLabel_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_label_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCommonStockSharesOutstanding" xlink:to="lab_dei_EntityCommonStockSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioAxis_01a17ad2-3371-75c1-9315-f879ada1cc21_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario [Axis]</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioAxis_label_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario [Axis]</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioAxis_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationClosingPriceScenarioAxis" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationClosingPriceScenarioAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationClosingPriceScenarioAxis" xlink:to="lab_arcc_BusinessCombinationClosingPriceScenarioAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ImagingBusinessMachinesLLCAndScannerHoldingsCorporationMember_019fed4d-3e55-7085-9dd1-f69cb2e198a8_terseLabel_en-US" xlink:label="lab_arcc_ImagingBusinessMachinesLLCAndScannerHoldingsCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Imaging Business Machines, L.L.C. and Scanner Holdings Corporation</link:label>
    <link:label id="lab_arcc_ImagingBusinessMachinesLLCAndScannerHoldingsCorporationMember_label_en-US" xlink:label="lab_arcc_ImagingBusinessMachinesLLCAndScannerHoldingsCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Imaging Business Machines, L.L.C. and Scanner Holdings Corporation [Member]</link:label>
    <link:label id="lab_arcc_ImagingBusinessMachinesLLCAndScannerHoldingsCorporationMember_documentation_en-US" xlink:label="lab_arcc_ImagingBusinessMachinesLLCAndScannerHoldingsCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Imaging Business Machines, L.L.C. and Scanner Holdings Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ImagingBusinessMachinesLLCAndScannerHoldingsCorporationMember" xlink:href="arcc-20260930.xsd#arcc_ImagingBusinessMachinesLLCAndScannerHoldingsCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ImagingBusinessMachinesLLCAndScannerHoldingsCorporationMember" xlink:to="lab_arcc_ImagingBusinessMachinesLLCAndScannerHoldingsCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased_019fed4d-3e56-7805-80f4-3f2a9b7c7208_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital gains incentive fee payable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Incentive Fee Payable, Capital-Gain-Based</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased" xlink:to="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConsumerDurablesAndApparelSectorMember_019fed4d-3e56-74bc-9bb8-598ec55ee5ff_terseLabel_en-US" xlink:label="lab_arcc_ConsumerDurablesAndApparelSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consumer Durables and Apparel</link:label>
    <link:label id="lab_arcc_ConsumerDurablesAndApparelSectorMember_label_en-US" xlink:label="lab_arcc_ConsumerDurablesAndApparelSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consumer Durables And Apparel Sector [Member]</link:label>
    <link:label id="lab_arcc_ConsumerDurablesAndApparelSectorMember_documentation_en-US" xlink:label="lab_arcc_ConsumerDurablesAndApparelSectorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Consumer Durables And Apparel Sector</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConsumerDurablesAndApparelSectorMember" xlink:href="arcc-20260930.xsd#arcc_ConsumerDurablesAndApparelSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ConsumerDurablesAndApparelSectorMember" xlink:to="lab_arcc_ConsumerDurablesAndApparelSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyAgreementsTextBlock_019fed4d-3d41-75fd-af5e-43ae3ffe89a5_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyAgreementsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AGREEMENTS</link:label>
    <link:label id="lab_arcc_InvestmentCompanyAgreementsTextBlock_label_en-US" xlink:label="lab_arcc_InvestmentCompanyAgreementsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Agreements [Text Block]</link:label>
    <link:label id="lab_arcc_InvestmentCompanyAgreementsTextBlock_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyAgreementsTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Agreements</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyAgreementsTextBlock" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyAgreementsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyAgreementsTextBlock" xlink:to="lab_arcc_InvestmentCompanyAgreementsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FeeIncome_019fed4d-3dd3-737b-940d-a0446bfe7525_terseLabel_en-US" xlink:label="lab_us-gaap_FeeIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital structuring service fees</link:label>
    <link:label id="lab_us-gaap_FeeIncome_019fed4d-3dd3-7e7b-bb07-d1de6db0022f_verboseLabel_en-US" xlink:label="lab_us-gaap_FeeIncome" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Capital structuring service fees and other income</link:label>
    <link:label id="lab_us-gaap_FeeIncome_label_en-US" xlink:label="lab_us-gaap_FeeIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fee Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FeeIncome" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FeeIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FeeIncome" xlink:to="lab_us-gaap_FeeIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MeasurementInputCreditSpreadMember_019fed4d-3d42-716c-a0c7-bd65705efc25_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputCreditSpreadMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Market yield</link:label>
    <link:label id="lab_us-gaap_MeasurementInputCreditSpreadMember_label_en-US" xlink:label="lab_us-gaap_MeasurementInputCreditSpreadMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input, Credit Spread [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputCreditSpreadMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputCreditSpreadMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputCreditSpreadMember" xlink:to="lab_us-gaap_MeasurementInputCreditSpreadMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_019fed4d-3dd3-748e-b237-2c2b180c57de_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">RELATED PARTY TRANSACTIONS</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transactions Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:to="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock_019fed4d-3e56-7143-9185-32426cb84f6a_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash</link:label>
    <link:label id="lab_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Cash and Cash Equivalents [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MRISoftwareLLCMember_019fed4d-3dd3-7a9f-b98e-40f76cd7fcb2_terseLabel_en-US" xlink:label="lab_arcc_MRISoftwareLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MRI Software LLC</link:label>
    <link:label id="lab_arcc_MRISoftwareLLCMember_label_en-US" xlink:label="lab_arcc_MRISoftwareLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MRI Software LLC [Member]</link:label>
    <link:label id="lab_arcc_MRISoftwareLLCMember_documentation_en-US" xlink:label="lab_arcc_MRISoftwareLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MRI Software LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MRISoftwareLLCMember" xlink:href="arcc-20260930.xsd#arcc_MRISoftwareLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MRISoftwareLLCMember" xlink:to="lab_arcc_MRISoftwareLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ChurchillOpCoHoldingsLLCAndVictoryTopcoLPMember_019fed4d-3dd3-739e-8f17-b7fe843778c6_terseLabel_en-US" xlink:label="lab_arcc_ChurchillOpCoHoldingsLLCAndVictoryTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Churchill OpCo Holdings LLC and Victory Topco, LP</link:label>
    <link:label id="lab_arcc_ChurchillOpCoHoldingsLLCAndVictoryTopcoLPMember_label_en-US" xlink:label="lab_arcc_ChurchillOpCoHoldingsLLCAndVictoryTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Churchill OpCo Holdings LLC and Victory Topco, LP [Member]</link:label>
    <link:label id="lab_arcc_ChurchillOpCoHoldingsLLCAndVictoryTopcoLPMember_documentation_en-US" xlink:label="lab_arcc_ChurchillOpCoHoldingsLLCAndVictoryTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Churchill OpCo Holdings LLC and Victory Topco, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ChurchillOpCoHoldingsLLCAndVictoryTopcoLPMember" xlink:href="arcc-20260930.xsd#arcc_ChurchillOpCoHoldingsLLCAndVictoryTopcoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ChurchillOpCoHoldingsLLCAndVictoryTopcoLPMember" xlink:to="lab_arcc_ChurchillOpCoHoldingsLLCAndVictoryTopcoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis_019fed4d-3dd3-72f2-8bcc-6494c2b3dd62_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Company, Nonconsolidated Subsidiary [Axis]</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Nonconsolidated Subsidiary [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_019fed4d-3dd3-7e84-add5-92dc6a4df1fb_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, par value (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_label_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Par or Stated Value Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="lab_us-gaap_CommonStockParOrStatedValuePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_019fed4d-3dd3-7c8f-834d-6b3bca319d54_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Axis]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GIRangerIntermediateLLCMember_019fed4d-3d42-7fe1-9668-18730f81da84_terseLabel_en-US" xlink:label="lab_arcc_GIRangerIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GI Ranger Intermediate LLC</link:label>
    <link:label id="lab_arcc_GIRangerIntermediateLLCMember_label_en-US" xlink:label="lab_arcc_GIRangerIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GI Ranger Intermediate LLC [Member]</link:label>
    <link:label id="lab_arcc_GIRangerIntermediateLLCMember_documentation_en-US" xlink:label="lab_arcc_GIRangerIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GI Ranger Intermediate LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GIRangerIntermediateLLCMember" xlink:href="arcc-20260930.xsd#arcc_GIRangerIntermediateLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GIRangerIntermediateLLCMember" xlink:to="lab_arcc_GIRangerIntermediateLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SaleOfStockGrossProceedsReceived_019fed4d-3dd3-7a87-94f4-290fe67d64ba_terseLabel_en-US" xlink:label="lab_arcc_SaleOfStockGrossProceedsReceived" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gross Proceeds</link:label>
    <link:label id="lab_arcc_SaleOfStockGrossProceedsReceived_label_en-US" xlink:label="lab_arcc_SaleOfStockGrossProceedsReceived" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Stock, Gross Proceeds Received</link:label>
    <link:label id="lab_arcc_SaleOfStockGrossProceedsReceived_documentation_en-US" xlink:label="lab_arcc_SaleOfStockGrossProceedsReceived" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sale of Stock, Gross Proceeds Received</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SaleOfStockGrossProceedsReceived" xlink:href="arcc-20260930.xsd#arcc_SaleOfStockGrossProceedsReceived"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SaleOfStockGrossProceedsReceived" xlink:to="lab_arcc_SaleOfStockGrossProceedsReceived" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember_019fed4d-3e56-7fca-8e79-ca88657ab71a_terseLabel_en-US" xlink:label="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ZenDesk, Inc., Zoro TopCo, Inc. and Zoro TopCo, LP</link:label>
    <link:label id="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember_label_en-US" xlink:label="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ZenDesk, Inc., Zoro TopCo, Inc. and Zoro TopCo, LP [Member]</link:label>
    <link:label id="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember_documentation_en-US" xlink:label="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ZenDesk, Inc., Zoro TopCo, Inc. and Zoro TopCo, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:href="arcc-20260930.xsd#arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:to="lab_arcc_ZenDeskIncZoroTopCoIncAndZoroTopCoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_019fed4d-3d42-7b99-955c-e12d884a19b1_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net accretion of discount on investments</link:label>
    <link:label id="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_label_en-US" xlink:label="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accretion (Amortization) of Discounts and Premiums, Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:to="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MeyerLaboratoryLLCAndMeyerParentLLCMember_019fed4d-3d42-7843-80c4-6c2cec472b88_terseLabel_en-US" xlink:label="lab_arcc_MeyerLaboratoryLLCAndMeyerParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Meyer Laboratory, LLC and Meyer Parent, LLC</link:label>
    <link:label id="lab_arcc_MeyerLaboratoryLLCAndMeyerParentLLCMember_label_en-US" xlink:label="lab_arcc_MeyerLaboratoryLLCAndMeyerParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Meyer Laboratory, LLC and Meyer Parent, LLC [Member]</link:label>
    <link:label id="lab_arcc_MeyerLaboratoryLLCAndMeyerParentLLCMember_documentation_en-US" xlink:label="lab_arcc_MeyerLaboratoryLLCAndMeyerParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Meyer Laboratory, LLC and Meyer Parent, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MeyerLaboratoryLLCAndMeyerParentLLCMember" xlink:href="arcc-20260930.xsd#arcc_MeyerLaboratoryLLCAndMeyerParentLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MeyerLaboratoryLLCAndMeyerParentLLCMember" xlink:to="lab_arcc_MeyerLaboratoryLLCAndMeyerParentLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HighStreetBuyerInc.AndHighStreetHoldcoLLCMember_019fed4d-3e56-7484-b8e5-5ef68762e449_terseLabel_en-US" xlink:label="lab_arcc_HighStreetBuyerInc.AndHighStreetHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">High Street Buyer, Inc. and High Street Holdco LLC</link:label>
    <link:label id="lab_arcc_HighStreetBuyerInc.AndHighStreetHoldcoLLCMember_label_en-US" xlink:label="lab_arcc_HighStreetBuyerInc.AndHighStreetHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">High Street Buyer, Inc. and High Street Holdco LLC [Member]</link:label>
    <link:label id="lab_arcc_HighStreetBuyerInc.AndHighStreetHoldcoLLCMember_documentation_en-US" xlink:label="lab_arcc_HighStreetBuyerInc.AndHighStreetHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">High Street Buyer, Inc. and High Street Holdco LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HighStreetBuyerInc.AndHighStreetHoldcoLLCMember" xlink:href="arcc-20260930.xsd#arcc_HighStreetBuyerInc.AndHighStreetHoldcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HighStreetBuyerInc.AndHighStreetHoldcoLLCMember" xlink:to="lab_arcc_HighStreetBuyerInc.AndHighStreetHoldcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FrontlineRoadSafetyOperationsLLCMember_019fed4d-3dd3-7ca4-8d2c-9953fe2fe44d_terseLabel_en-US" xlink:label="lab_arcc_FrontlineRoadSafetyOperationsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Frontline Road Safety Operations, LLC</link:label>
    <link:label id="lab_arcc_FrontlineRoadSafetyOperationsLLCMember_label_en-US" xlink:label="lab_arcc_FrontlineRoadSafetyOperationsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Frontline Road Safety Operations, LLC [Member]</link:label>
    <link:label id="lab_arcc_FrontlineRoadSafetyOperationsLLCMember_documentation_en-US" xlink:label="lab_arcc_FrontlineRoadSafetyOperationsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Frontline Road Safety Operations, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FrontlineRoadSafetyOperationsLLCMember" xlink:href="arcc-20260930.xsd#arcc_FrontlineRoadSafetyOperationsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FrontlineRoadSafetyOperationsLLCMember" xlink:to="lab_arcc_FrontlineRoadSafetyOperationsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_OutstandingAggtErrCompAmt_terseLabel_en-US" xlink:label="lab_ecd_OutstandingAggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding Aggregate Erroneous Compensation Amount</link:label>
    <link:label id="lab_ecd_OutstandingAggtErrCompAmt_label_en-US" xlink:label="lab_ecd_OutstandingAggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Outstanding Aggregate Erroneous Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingAggtErrCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_OutstandingAggtErrCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_OutstandingAggtErrCompAmt" xlink:to="lab_ecd_OutstandingAggtErrCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NumberOfReportableSegments_019fed4d-3e56-74ff-92ee-23009f2d131f_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of reportable segment</link:label>
    <link:label id="lab_us-gaap_NumberOfReportableSegments_label_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Reportable Segments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NumberOfReportableSegments" xlink:to="lab_us-gaap_NumberOfReportableSegments" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_THGAcquisitionLLCMember_019fed4d-3d42-73b3-b65b-930cb38c7e2b_terseLabel_en-US" xlink:label="lab_arcc_THGAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">THG Acquisition, LLC</link:label>
    <link:label id="lab_arcc_THGAcquisitionLLCMember_label_en-US" xlink:label="lab_arcc_THGAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">THG Acquisition, LLC [Member]</link:label>
    <link:label id="lab_arcc_THGAcquisitionLLCMember_documentation_en-US" xlink:label="lab_arcc_THGAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">THG Acquisition, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_THGAcquisitionLLCMember" xlink:href="arcc-20260930.xsd#arcc_THGAcquisitionLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_THGAcquisitionLLCMember" xlink:to="lab_arcc_THGAcquisitionLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased_019fed4d-3e56-78a2-95ac-4e8878a77281_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income based fee payable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Incentive Fee Payable, Income-Based</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased" xlink:to="lab_us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation_019fed4d-3d42-769c-a065-3b25096c54ff_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized appreciation on investments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Distributable Earnings (Loss), Accumulated Appreciation (Depreciation)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation" xlink:to="lab_us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedAppreciationDepreciation" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressCityOrTown_019fed4d-3dd3-73fa-86bd-c2c88c10a955_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:label id="lab_dei_EntityAddressCityOrTown_label_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCityOrTown" xlink:to="lab_dei_EntityAddressCityOrTown" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ApteanInc.AndApteanAcquirorIncMember_019fed4d-3d42-72b3-961f-10c11de56ca9_terseLabel_en-US" xlink:label="lab_arcc_ApteanInc.AndApteanAcquirorIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aptean, Inc. and Aptean Acquiror Inc</link:label>
    <link:label id="lab_arcc_ApteanInc.AndApteanAcquirorIncMember_label_en-US" xlink:label="lab_arcc_ApteanInc.AndApteanAcquirorIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aptean, Inc. and Aptean Acquiror Inc [Member]</link:label>
    <link:label id="lab_arcc_ApteanInc.AndApteanAcquirorIncMember_documentation_en-US" xlink:label="lab_arcc_ApteanInc.AndApteanAcquirorIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Aptean, Inc. and Aptean Acquiror Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ApteanInc.AndApteanAcquirorIncMember" xlink:href="arcc-20260930.xsd#arcc_ApteanInc.AndApteanAcquirorIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ApteanInc.AndApteanAcquirorIncMember" xlink:to="lab_arcc_ApteanInc.AndApteanAcquirorIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeNet_019fed4d-3d42-7f67-b29d-e5d363b8e3a2_verboseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeNet" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Derivatives</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeNet_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Fair Value, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeNet" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeNet" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_June2027NotesMember_019fed4d-3e56-7a8c-8f21-d72f49440928_verboseLabel_en-US" xlink:label="lab_arcc_June2027NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">June 2027 Notes</link:label>
    <link:label id="lab_arcc_June2027NotesMember_019fed4d-3e56-74ef-9595-d4f5a77d855c_terseLabel_en-US" xlink:label="lab_arcc_June2027NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">June 2027 Notes (principal amount outstanding of $500)</link:label>
    <link:label id="lab_arcc_June2027NotesMember_label_en-US" xlink:label="lab_arcc_June2027NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">June 2027 Notes [Member]</link:label>
    <link:label id="lab_arcc_June2027NotesMember_documentation_en-US" xlink:label="lab_arcc_June2027NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">June 2027 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_June2027NotesMember" xlink:href="arcc-20260930.xsd#arcc_June2027NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_June2027NotesMember" xlink:to="lab_arcc_June2027NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract" xlink:to="lab_us-gaap_StatementOfFinancialPositionAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AQSunshineInc.AndBayPineRegalCoInvestLPMember_019fed4d-3e56-7994-9aa9-5a334ca10214_terseLabel_en-US" xlink:label="lab_arcc_AQSunshineInc.AndBayPineRegalCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AQ Sunshine, Inc. and BayPine Regal Co-Invest, LP</link:label>
    <link:label id="lab_arcc_AQSunshineInc.AndBayPineRegalCoInvestLPMember_label_en-US" xlink:label="lab_arcc_AQSunshineInc.AndBayPineRegalCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AQ Sunshine, Inc. and BayPine Regal Co-Invest, LP [Member]</link:label>
    <link:label id="lab_arcc_AQSunshineInc.AndBayPineRegalCoInvestLPMember_documentation_en-US" xlink:label="lab_arcc_AQSunshineInc.AndBayPineRegalCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">AQ Sunshine, Inc. and BayPine Regal Co-Invest, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AQSunshineInc.AndBayPineRegalCoInvestLPMember" xlink:href="arcc-20260930.xsd#arcc_AQSunshineInc.AndBayPineRegalCoInvestLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AQSunshineInc.AndBayPineRegalCoInvestLPMember" xlink:to="lab_arcc_AQSunshineInc.AndBayPineRegalCoInvestLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IncreaseDecreaseInPayablesToParticipants_019fed4d-3e56-728e-aa13-24a9e01ca863_terseLabel_en-US" xlink:label="lab_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payable to participants</link:label>
    <link:label id="lab_arcc_IncreaseDecreaseInPayablesToParticipants_label_en-US" xlink:label="lab_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) In Payables To Participants</link:label>
    <link:label id="lab_arcc_IncreaseDecreaseInPayablesToParticipants_documentation_en-US" xlink:label="lab_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase (Decrease) In Payables To Participants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:href="arcc-20260930.xsd#arcc_IncreaseDecreaseInPayablesToParticipants"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:to="lab_arcc_IncreaseDecreaseInPayablesToParticipants" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeerGroupTotalShareholderRtnAmt_terseLabel_en-US" xlink:label="lab_ecd_PeerGroupTotalShareholderRtnAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Peer Group Total Shareholder Return Amount</link:label>
    <link:label id="lab_ecd_PeerGroupTotalShareholderRtnAmt_label_en-US" xlink:label="lab_ecd_PeerGroupTotalShareholderRtnAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Peer Group Total Shareholder Return Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeerGroupTotalShareholderRtnAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PeerGroupTotalShareholderRtnAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeerGroupTotalShareholderRtnAmt" xlink:to="lab_ecd_PeerGroupTotalShareholderRtnAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember_019fed4d-3e56-7ec5-8822-c9cfb7e0c0fa_terseLabel_en-US" xlink:label="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sun Acquirer Corp. and Sun TopCo, LP</link:label>
    <link:label id="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember_label_en-US" xlink:label="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sun Acquirer Corp. and Sun TopCo, LP [Member]</link:label>
    <link:label id="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember_documentation_en-US" xlink:label="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sun Acquirer Corp. and Sun TopCo, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:href="arcc-20260930.xsd#arcc_SunAcquirerCorpAndSunTopCoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:to="lab_arcc_SunAcquirerCorpAndSunTopCoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PerigonWealthManagementLLCPerigonWealthAdvisorsHoldingsCompanyLLCAndCWCFundICoInvestPrismLPMember_019fed4d-3e56-75f5-8cd2-c44cfc78c701_terseLabel_en-US" xlink:label="lab_arcc_PerigonWealthManagementLLCPerigonWealthAdvisorsHoldingsCompanyLLCAndCWCFundICoInvestPrismLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Perigon Wealth Management, LLC, Perigon Wealth Advisors Holdings Company, LLC and CWC Fund I Co-Invest (Prism) LP</link:label>
    <link:label id="lab_arcc_PerigonWealthManagementLLCPerigonWealthAdvisorsHoldingsCompanyLLCAndCWCFundICoInvestPrismLPMember_label_en-US" xlink:label="lab_arcc_PerigonWealthManagementLLCPerigonWealthAdvisorsHoldingsCompanyLLCAndCWCFundICoInvestPrismLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Perigon Wealth Management, LLC, Perigon Wealth Advisors Holdings Company, LLC and CWC Fund I Co-Invest (Prism) LP [Member]</link:label>
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    <link:label id="lab_us-gaap_FairValueInputsLevel2Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 2 [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel2Member" xlink:to="lab_us-gaap_FairValueInputsLevel2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GestionABSBidcoInc.ABSBidcoHoldingsInc.Member_019fed4d-3dd3-74e4-9606-a9900f0b1cb9_terseLabel_en-US" xlink:label="lab_arcc_GestionABSBidcoInc.ABSBidcoHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gestion ABS Bidco Inc. / ABS Bidco Holdings Inc.</link:label>
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    <link:label id="lab_arcc_GestionABSBidcoInc.ABSBidcoHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_GestionABSBidcoInc.ABSBidcoHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gestion ABS Bidco Inc. / ABS Bidco Holdings Inc.</link:label>
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    <link:label id="lab_us-gaap_InvestmentInterestRate_019fed4d-3d42-7fbc-bd32-c5cddfee3e9c_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Coupon</link:label>
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    <link:label id="lab_us-gaap_OtherExpenses_label_en-US" xlink:label="lab_us-gaap_OtherExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Expenses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherExpenses" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherExpenses" xlink:to="lab_us-gaap_OtherExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsDomain_019fed4d-3d42-7c9a-8e4a-894c02fa7d04_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends [Domain]</link:label>
    <link:label id="lab_us-gaap_DividendsDomain_label_en-US" xlink:label="lab_us-gaap_DividendsDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsDomain" xlink:to="lab_us-gaap_DividendsDomain" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_DividendIncomeOperating_019fed4d-3dd3-75fc-9824-11323b6002e0_verboseLabel_en-US" xlink:label="lab_us-gaap_DividendIncomeOperating" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Dividend income</link:label>
    <link:label id="lab_us-gaap_DividendIncomeOperating_label_en-US" xlink:label="lab_us-gaap_DividendIncomeOperating" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividend Income, Operating</link:label>
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    <link:label id="lab_arcc_SystemsPlanningAndAnalysisInc.Member_documentation_en-US" xlink:label="lab_arcc_SystemsPlanningAndAnalysisInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Systems Planning and Analysis, Inc.</link:label>
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    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeAxis" xlink:to="lab_us-gaap_SubsequentEventTypeAxis" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_BaseRateAfterReinvestmentPeriodMember_documentation_en-US" xlink:label="lab_arcc_BaseRateAfterReinvestmentPeriodMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Base Rate, After Reinvestment Period</link:label>
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    <link:label id="lab_us-gaap_ConcentrationRiskByTypeAxis_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_TSWTAcquisitionInc.AndTSWTHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_TSWTAcquisitionInc.AndTSWTHoldingsLLCMember"/>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FoodAndBeverageSectorMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FoodAndBeverageSectorMember"/>
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    <link:label id="lab_arcc_ADGLLCGEDCEquityLLCAndGEDCHoldcoInc.Member_documentation_en-US" xlink:label="lab_arcc_ADGLLCGEDCEquityLLCAndGEDCHoldcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ADG, LLC, GEDC Equity, LLC and GEDC Holdco, Inc.</link:label>
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    <link:label id="lab_arcc_PestCoHoldingsLLCAndPestCoLLCMember_documentation_en-US" xlink:label="lab_arcc_PestCoHoldingsLLCAndPestCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PestCo Holdings, LLC and PestCo, LLC</link:label>
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    <link:label id="lab_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Arrowhead Holdco Company and Arrowhead GS Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember" xlink:to="lab_arcc_ArrowheadHoldcoCompanyAndArrowheadGSHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_019fed4d-3d42-7b69-b26d-3a81b41e430f_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Principal Amount Issued</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Face Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFaceAmount" xlink:to="lab_us-gaap_DebtInstrumentFaceAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MariEventsMidcoLLCAndAEEventsCoHoldingsLLCMember_019fed4d-3d42-73c7-8c30-e5d5cf74cf1f_terseLabel_en-US" xlink:label="lab_arcc_MariEventsMidcoLLCAndAEEventsCoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mari Events Midco LLC and AE EventsCo Holdings LLC</link:label>
    <link:label id="lab_arcc_MariEventsMidcoLLCAndAEEventsCoHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_MariEventsMidcoLLCAndAEEventsCoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mari Events Midco LLC and AE EventsCo Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_MariEventsMidcoLLCAndAEEventsCoHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_MariEventsMidcoLLCAndAEEventsCoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mari Events Midco LLC and AE EventsCo Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MariEventsMidcoLLCAndAEEventsCoHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_MariEventsMidcoLLCAndAEEventsCoHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MariEventsMidcoLLCAndAEEventsCoHoldingsLLCMember" xlink:to="lab_arcc_MariEventsMidcoLLCAndAEEventsCoHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentTerm_019fed4d-3dd3-7f88-b58e-2a805a7c7da4_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term of debt instrument</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentTerm_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentTerm" xlink:to="lab_us-gaap_DebtInstrumentTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashHeldInForeignCurrency_019fed4d-3d41-7f57-b5b4-fc69137f5a7f_terseLabel_en-US" xlink:label="lab_us-gaap_CashHeldInForeignCurrency" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash denominated in foreign currencies</link:label>
    <link:label id="lab_us-gaap_CashHeldInForeignCurrency_label_en-US" xlink:label="lab_us-gaap_CashHeldInForeignCurrency" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalent, Held in Foreign Currency</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashHeldInForeignCurrency" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashHeldInForeignCurrency"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashHeldInForeignCurrency" xlink:to="lab_us-gaap_CashHeldInForeignCurrency" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueInputsLevel12And3Member_019fed4d-3dd3-7fea-9863-aef62503f8c9_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel12And3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel12And3Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel12And3Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel12And3Member" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel12And3Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member" xlink:to="lab_us-gaap_FairValueInputsLevel12And3Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ATIRestorationLLCMember_019fed4d-3dd3-7660-b51a-aa1452c2bf51_terseLabel_en-US" xlink:label="lab_arcc_ATIRestorationLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ATI Restoration, LLC</link:label>
    <link:label id="lab_arcc_ATIRestorationLLCMember_label_en-US" xlink:label="lab_arcc_ATIRestorationLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ATI Restoration, LLC [Member]</link:label>
    <link:label id="lab_arcc_ATIRestorationLLCMember_documentation_en-US" xlink:label="lab_arcc_ATIRestorationLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ATI Restoration, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ATIRestorationLLCMember" xlink:href="arcc-20260930.xsd#arcc_ATIRestorationLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ATIRestorationLLCMember" xlink:to="lab_arcc_ATIRestorationLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidationEliminationsMember_01a1603c-5f16-7460-bd46-5d3613373461_terseLabel_en-US" xlink:label="lab_srt_ConsolidationEliminationsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Eliminations</link:label>
    <link:label id="lab_srt_ConsolidationEliminationsMember_label_en-US" xlink:label="lab_srt_ConsolidationEliminationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation, Eliminations [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationEliminationsMember" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationEliminationsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationEliminationsMember" xlink:to="lab_srt_ConsolidationEliminationsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember_019fed4d-3e56-7ac8-a662-f871d6c17a8f_terseLabel_en-US" xlink:label="lab_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DRS Holdings III, Inc. and DRS Holdings I, Inc.</link:label>
    <link:label id="lab_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember_label_en-US" xlink:label="lab_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">DRS Holdings III, Inc. and DRS Holdings I, Inc. [Member]</link:label>
    <link:label id="lab_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember_documentation_en-US" xlink:label="lab_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">DRS Holdings III, Inc. and DRS Holdings I, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember" xlink:href="arcc-20260930.xsd#arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember" xlink:to="lab_arcc_DRSHoldingsIIIIncAndDRSHoldingsIIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019fed4d-3d42-7ad0-8422-beb964b11056_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gains (losses) on investments and foreign currency transactions</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityShellCompany_019fed4d-3e56-7213-8000-f9a1ae4dc593_terseLabel_en-US" xlink:label="lab_dei_EntityShellCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Shell Company</link:label>
    <link:label id="lab_dei_EntityShellCompany_label_en-US" xlink:label="lab_dei_EntityShellCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Shell Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityShellCompany" xlink:to="lab_dei_EntityShellCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidationItemsDomain_019fed4d-3dd3-7d7d-a27b-007eb6e03a04_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:label id="lab_srt_ConsolidationItemsDomain_label_en-US" xlink:label="lab_srt_ConsolidationItemsDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsDomain" xlink:to="lab_srt_ConsolidationItemsDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NovipaxBuyerLLCAndNovipaxParentHoldingCompanyLLCMember_019fed4d-3d42-736d-92db-7e72371c8993_terseLabel_en-US" xlink:label="lab_arcc_NovipaxBuyerLLCAndNovipaxParentHoldingCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Novipax Buyer, L.L.C. and Novipax Parent Holding Company, L.L.C.</link:label>
    <link:label id="lab_arcc_NovipaxBuyerLLCAndNovipaxParentHoldingCompanyLLCMember_label_en-US" xlink:label="lab_arcc_NovipaxBuyerLLCAndNovipaxParentHoldingCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Novipax Buyer, L.L.C. and Novipax Parent Holding Company, L.L.C. [Member]</link:label>
    <link:label id="lab_arcc_NovipaxBuyerLLCAndNovipaxParentHoldingCompanyLLCMember_documentation_en-US" xlink:label="lab_arcc_NovipaxBuyerLLCAndNovipaxParentHoldingCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Novipax Buyer, L.L.C. and Novipax Parent Holding Company, L.L.C.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NovipaxBuyerLLCAndNovipaxParentHoldingCompanyLLCMember" xlink:href="arcc-20260930.xsd#arcc_NovipaxBuyerLLCAndNovipaxParentHoldingCompanyLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NovipaxBuyerLLCAndNovipaxParentHoldingCompanyLLCMember" xlink:to="lab_arcc_NovipaxBuyerLLCAndNovipaxParentHoldingCompanyLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InfinityHomeServicesHoldcoInc.DAngeloSonsConstructionLimitedAndIHSParentHoldingsL.P.Member_019fed4d-3dd3-7adf-a839-7ff2d26e6e10_terseLabel_en-US" xlink:label="lab_arcc_InfinityHomeServicesHoldcoInc.DAngeloSonsConstructionLimitedAndIHSParentHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Infinity Home Services Holdco, Inc., D'Angelo &amp; Sons Construction Limited and IHS Parent Holdings, L.P.</link:label>
    <link:label id="lab_arcc_InfinityHomeServicesHoldcoInc.DAngeloSonsConstructionLimitedAndIHSParentHoldingsL.P.Member_label_en-US" xlink:label="lab_arcc_InfinityHomeServicesHoldcoInc.DAngeloSonsConstructionLimitedAndIHSParentHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Infinity Home Services Holdco, Inc., D'Angelo &amp; Sons Construction Limited and IHS Parent Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_InfinityHomeServicesHoldcoInc.DAngeloSonsConstructionLimitedAndIHSParentHoldingsL.P.Member_documentation_en-US" xlink:label="lab_arcc_InfinityHomeServicesHoldcoInc.DAngeloSonsConstructionLimitedAndIHSParentHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Infinity Home Services Holdco, Inc., D'Angelo &amp; Sons Construction Limited and IHS Parent Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InfinityHomeServicesHoldcoInc.DAngeloSonsConstructionLimitedAndIHSParentHoldingsL.P.Member" xlink:href="arcc-20260930.xsd#arcc_InfinityHomeServicesHoldcoInc.DAngeloSonsConstructionLimitedAndIHSParentHoldingsL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InfinityHomeServicesHoldcoInc.DAngeloSonsConstructionLimitedAndIHSParentHoldingsL.P.Member" xlink:to="lab_arcc_InfinityHomeServicesHoldcoInc.DAngeloSonsConstructionLimitedAndIHSParentHoldingsL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee_019fed4d-3dd3-73aa-92a1-833e1c792746_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ratio of operating expenses to average net assets</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Expense Ratio, after Fee Waiver and Incentive Fee Deduction</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee" xlink:to="lab_us-gaap_InvestmentCompanyExpenseRatioIncludingIncentiveFee" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CornerstoneOnDemandIncAndSunshineSoftwareHoldingsIncMember_019fed4d-3dd3-73d6-83b7-572a0a7823c1_terseLabel_en-US" xlink:label="lab_arcc_CornerstoneOnDemandIncAndSunshineSoftwareHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cornerstone OnDemand, Inc. and Sunshine Software Holdings, Inc.</link:label>
    <link:label id="lab_arcc_CornerstoneOnDemandIncAndSunshineSoftwareHoldingsIncMember_label_en-US" xlink:label="lab_arcc_CornerstoneOnDemandIncAndSunshineSoftwareHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cornerstone OnDemand, Inc. and Sunshine Software Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_CornerstoneOnDemandIncAndSunshineSoftwareHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_CornerstoneOnDemandIncAndSunshineSoftwareHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cornerstone OnDemand, Inc. and Sunshine Software Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CornerstoneOnDemandIncAndSunshineSoftwareHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_CornerstoneOnDemandIncAndSunshineSoftwareHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CornerstoneOnDemandIncAndSunshineSoftwareHoldingsIncMember" xlink:to="lab_arcc_CornerstoneOnDemandIncAndSunshineSoftwareHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DeltaGTBuyerLLCAndDeltaGTParentLPMember_01a159d5-5ead-7702-8ce7-c9d41c83b5d5_terseLabel_en-US" xlink:label="lab_arcc_DeltaGTBuyerLLCAndDeltaGTParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Delta GT Buyer, LLC and Delta GT Parent, LP</link:label>
    <link:label id="lab_arcc_DeltaGTBuyerLLCAndDeltaGTParentLPMember_label_en-US" xlink:label="lab_arcc_DeltaGTBuyerLLCAndDeltaGTParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Delta GT Buyer, LLC and Delta GT Parent, LP [Member]</link:label>
    <link:label id="lab_arcc_DeltaGTBuyerLLCAndDeltaGTParentLPMember_documentation_en-US" xlink:label="lab_arcc_DeltaGTBuyerLLCAndDeltaGTParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Delta GT Buyer, LLC and Delta GT Parent, LP</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DeltaGTBuyerLLCAndDeltaGTParentLPMember" xlink:to="lab_arcc_DeltaGTBuyerLLCAndDeltaGTParentLPMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_019fed4d-3e56-79f0-a7bd-d760fe7db8cb_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EARNINGS PER SHARE</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareTextBlock" xlink:to="lab_us-gaap_EarningsPerShareTextBlock" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_EarningsPerShareAbstract_019fed4d-3dd3-7421-85a3-8d89f24c38fe_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NET INCOME PER COMMON SHARE</link:label>
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    <link:label id="lab_arcc_SaleOfStockAvailableForIssuanceAmount_documentation_en-US" xlink:label="lab_arcc_SaleOfStockAvailableForIssuanceAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sale Of Stock, Available For Issuance, Amount</link:label>
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    <link:label id="lab_arcc_GHPVGSPurchaserLLCMember_019fed4d-3e56-75e0-ae79-b807d517fddb_terseLabel_en-US" xlink:label="lab_arcc_GHPVGSPurchaserLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GHP-VGS Purchaser LLC</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalPeriodFocus" xlink:to="lab_dei_DocumentFiscalPeriodFocus" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncentiveFeePayableCapitalGainBased_019fed4d-3dd3-7265-a86f-11d575419872_terseLabel_en-US" xlink:label="lab_us-gaap_IncentiveFeePayableCapitalGainBased" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital gains incentive fee payable</link:label>
    <link:label id="lab_us-gaap_IncentiveFeePayableCapitalGainBased_label_en-US" xlink:label="lab_us-gaap_IncentiveFeePayableCapitalGainBased" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Incentive Fee Payable, Capital-Gain-Based</link:label>
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    <link:label id="lab_us-gaap_Liabilities_019fed4d-3e56-79d2-92d9-ed70400afa93_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_us-gaap_Liabilities_label_en-US" xlink:label="lab_us-gaap_Liabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities" xlink:to="lab_us-gaap_Liabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_TradingSymbol_019fed4d-3dd3-743a-b1e5-627fb61e91e9_terseLabel_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading Symbol</link:label>
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    <link:label id="lab_arcc_ForwardKeystoneHoldingsLPMember_019fed4d-3e56-7a07-9675-b92b677471d6_terseLabel_en-US" xlink:label="lab_arcc_ForwardKeystoneHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forward Keystone Holdings, LP</link:label>
    <link:label id="lab_arcc_ForwardKeystoneHoldingsLPMember_label_en-US" xlink:label="lab_arcc_ForwardKeystoneHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forward Keystone Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_ForwardKeystoneHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_ForwardKeystoneHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Forward Keystone Holdings, LP</link:label>
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    <link:label id="lab_us-gaap_MeasurementInputDiscountRateMember_019fed4d-3e56-7d3b-a4ad-2b346c77b52b_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputDiscountRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Discount rate</link:label>
    <link:label id="lab_us-gaap_MeasurementInputDiscountRateMember_label_en-US" xlink:label="lab_us-gaap_MeasurementInputDiscountRateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input, Discount Rate [Member]</link:label>
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    <link:label id="lab_arcc_TechnologyHardwareAndEquipmentMember_019fed4d-3e55-7aaa-b47a-0b00f4319850_terseLabel_en-US" xlink:label="lab_arcc_TechnologyHardwareAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Technology Hardware and Equipment</link:label>
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    <link:label id="lab_arcc_AutomotiveKeysGroupLLCAndAutomotiveKeysInvestorLLCMember_019fed4d-3d41-7658-bcb7-5d9e9d205b01_terseLabel_en-US" xlink:label="lab_arcc_AutomotiveKeysGroupLLCAndAutomotiveKeysInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Automotive Keys Group, LLC and Automotive Keys Investor, LLC</link:label>
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    <link:label id="lab_arcc_July2029NotesMember_019fed4d-3e55-7aac-936f-357c3f0d3c27_verboseLabel_en-US" xlink:label="lab_arcc_July2029NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">July 2029 Notes (principal amount outstanding of $850)</link:label>
    <link:label id="lab_arcc_July2029NotesMember_label_en-US" xlink:label="lab_arcc_July2029NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">July 2029 Notes [Member]</link:label>
    <link:label id="lab_arcc_July2029NotesMember_documentation_en-US" xlink:label="lab_arcc_July2029NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">July 2029 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_July2029NotesMember" xlink:href="arcc-20260930.xsd#arcc_July2029NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_July2029NotesMember" xlink:to="lab_arcc_July2029NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_CoSelectedMeasureName_terseLabel_en-US" xlink:label="lab_ecd_CoSelectedMeasureName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Company Selected Measure Name</link:label>
    <link:label id="lab_ecd_CoSelectedMeasureName_label_en-US" xlink:label="lab_ecd_CoSelectedMeasureName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Company Selected Measure Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CoSelectedMeasureName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_CoSelectedMeasureName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CoSelectedMeasureName" xlink:to="lab_ecd_CoSelectedMeasureName" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SaleOfStockNameOfTransactionDomain_019fed4d-3d42-776f-9998-3214bc623006_terseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sale of Stock [Domain]</link:label>
    <link:label id="lab_us-gaap_SaleOfStockNameOfTransactionDomain_label_en-US" xlink:label="lab_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Stock [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="lab_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_019fed4d-3e56-7d4a-bbe4-1e426a05b575_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash</link:label>
    <link:label id="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restrictions on Cash and Cash Equivalents [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:to="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_QBSParentInc.Member_019fed4d-3d42-746a-9208-204efd3b52dc_terseLabel_en-US" xlink:label="lab_arcc_QBSParentInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">QBS Parent, Inc.</link:label>
    <link:label id="lab_arcc_QBSParentInc.Member_label_en-US" xlink:label="lab_arcc_QBSParentInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">QBS Parent, Inc. [Member]</link:label>
    <link:label id="lab_arcc_QBSParentInc.Member_documentation_en-US" xlink:label="lab_arcc_QBSParentInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">QBS Parent, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_QBSParentInc.Member" xlink:href="arcc-20260930.xsd#arcc_QBSParentInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_QBSParentInc.Member" xlink:to="lab_arcc_QBSParentInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeFixedInterestRate_019fed4d-3d41-7649-b9d3-a06c2c386ec3_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFixedInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Company Receives</link:label>
    <link:label id="lab_us-gaap_DerivativeFixedInterestRate_label_en-US" xlink:label="lab_us-gaap_DerivativeFixedInterestRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Fixed Interest Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFixedInterestRate" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFixedInterestRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFixedInterestRate" xlink:to="lab_us-gaap_DerivativeFixedInterestRate" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CradleLuxBidcoS.A.R.L.AndHamiltonThorneInc.Member_019fed4d-3e56-7d2c-957e-a9788b1c1209_terseLabel_en-US" xlink:label="lab_arcc_CradleLuxBidcoS.A.R.L.AndHamiltonThorneInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cradle Lux Bidco S.A.R.L. and Hamilton Thorne Inc.</link:label>
    <link:label id="lab_arcc_CradleLuxBidcoS.A.R.L.AndHamiltonThorneInc.Member_label_en-US" xlink:label="lab_arcc_CradleLuxBidcoS.A.R.L.AndHamiltonThorneInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cradle Lux Bidco S.A.R.L. and Hamilton Thorne Inc. [Member]</link:label>
    <link:label id="lab_arcc_CradleLuxBidcoS.A.R.L.AndHamiltonThorneInc.Member_documentation_en-US" xlink:label="lab_arcc_CradleLuxBidcoS.A.R.L.AndHamiltonThorneInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cradle Lux Bidco S.A.R.L. and Hamilton Thorne Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CradleLuxBidcoS.A.R.L.AndHamiltonThorneInc.Member" xlink:href="arcc-20260930.xsd#arcc_CradleLuxBidcoS.A.R.L.AndHamiltonThorneInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CradleLuxBidcoS.A.R.L.AndHamiltonThorneInc.Member" xlink:to="lab_arcc_CradleLuxBidcoS.A.R.L.AndHamiltonThorneInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP2Member_019fed4d-3dd3-7370-b873-d804185e405f_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, GBP 2</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP2Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, GBP 2 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP2Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP2Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, GBP 2</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractGBP2Member" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractGBP2Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractGBP2Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractGBP2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedAtCostYield_019fed4d-3dd3-725f-af38-4a708f0fa327_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedAtCostYield" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Yield on investment, at cost</link:label>
    <link:label id="lab_arcc_InvestmentOwnedAtCostYield_label_en-US" xlink:label="lab_arcc_InvestmentOwnedAtCostYield" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, at Cost, Yield</link:label>
    <link:label id="lab_arcc_InvestmentOwnedAtCostYield_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedAtCostYield" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, at Cost, Yield</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedAtCostYield" xlink:href="arcc-20260930.xsd#arcc_InvestmentOwnedAtCostYield"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedAtCostYield" xlink:to="lab_arcc_InvestmentOwnedAtCostYield" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SGPShakaHoldCoLLCAndSGPShakaJVLLCMember_019fed4d-3e56-7353-8f28-6fb024f33db6_terseLabel_en-US" xlink:label="lab_arcc_SGPShakaHoldCoLLCAndSGPShakaJVLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SGP Shaka HoldCo, LLC and SGP Shaka JV, LLC</link:label>
    <link:label id="lab_arcc_SGPShakaHoldCoLLCAndSGPShakaJVLLCMember_label_en-US" xlink:label="lab_arcc_SGPShakaHoldCoLLCAndSGPShakaJVLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SGP Shaka HoldCo, LLC and SGP Shaka JV, LLC [Member]</link:label>
    <link:label id="lab_arcc_SGPShakaHoldCoLLCAndSGPShakaJVLLCMember_documentation_en-US" xlink:label="lab_arcc_SGPShakaHoldCoLLCAndSGPShakaJVLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SGP Shaka HoldCo, LLC and SGP Shaka JV, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SGPShakaHoldCoLLCAndSGPShakaJVLLCMember" xlink:href="arcc-20260930.xsd#arcc_SGPShakaHoldCoLLCAndSGPShakaJVLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SGPShakaHoldCoLLCAndSGPShakaJVLLCMember" xlink:to="lab_arcc_SGPShakaHoldCoLLCAndSGPShakaJVLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember_019fed4d-3d41-7772-b26f-d9ab32d47f04_terseLabel_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember_label_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P., Equity Investment [Member]</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember_documentation_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P., Equity Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:href="arcc-20260930.xsd#arcc_IvyHillAssetManagementLPEquityInvestmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:to="lab_arcc_IvyHillAssetManagementLPEquityInvestmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_KingsBuyerLLCMember_019fed4d-3dd3-71a5-a83c-7f34fd308939_terseLabel_en-US" xlink:label="lab_arcc_KingsBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Kings Buyer, LLC</link:label>
    <link:label id="lab_arcc_KingsBuyerLLCMember_label_en-US" xlink:label="lab_arcc_KingsBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Kings Buyer, LLC [Member]</link:label>
    <link:label id="lab_arcc_KingsBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_KingsBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Kings Buyer, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KingsBuyerLLCMember" xlink:href="arcc-20260930.xsd#arcc_KingsBuyerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KingsBuyerLLCMember" xlink:to="lab_arcc_KingsBuyerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SurescriptsLLCMember_019fed4d-3e56-7671-b921-4177a5ba8a99_terseLabel_en-US" xlink:label="lab_arcc_SurescriptsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Surescripts, LLC</link:label>
    <link:label id="lab_arcc_SurescriptsLLCMember_label_en-US" xlink:label="lab_arcc_SurescriptsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Surescripts, LLC [Member]</link:label>
    <link:label id="lab_arcc_SurescriptsLLCMember_documentation_en-US" xlink:label="lab_arcc_SurescriptsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Surescripts, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SurescriptsLLCMember" xlink:href="arcc-20260930.xsd#arcc_SurescriptsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SurescriptsLLCMember" xlink:to="lab_arcc_SurescriptsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BayouIntermediateIILLCMember_019fed4d-3d42-7ae7-884d-8c1fa7b4fa7e_terseLabel_en-US" xlink:label="lab_arcc_BayouIntermediateIILLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bayou Intermediate II, LLC,</link:label>
    <link:label id="lab_arcc_BayouIntermediateIILLCMember_label_en-US" xlink:label="lab_arcc_BayouIntermediateIILLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bayou Intermediate II, LLC, [Member]</link:label>
    <link:label id="lab_arcc_BayouIntermediateIILLCMember_documentation_en-US" xlink:label="lab_arcc_BayouIntermediateIILLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bayou Intermediate II, LLC,</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BayouIntermediateIILLCMember" xlink:href="arcc-20260930.xsd#arcc_BayouIntermediateIILLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BayouIntermediateIILLCMember" xlink:to="lab_arcc_BayouIntermediateIILLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PCIASPV3LLCAndCHHSZHoldingsLLCMember_01a15995-5e68-7239-9957-c349e0edbf8d_terseLabel_en-US" xlink:label="lab_arcc_PCIASPV3LLCAndCHHSZHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PCIA SPV-3, LLC and CHHSZ Holdings, LLC</link:label>
    <link:label id="lab_arcc_PCIASPV3LLCAndCHHSZHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PCIASPV3LLCAndCHHSZHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PCIA SPV-3, LLC and CHHSZ Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_PCIASPV3LLCAndCHHSZHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PCIASPV3LLCAndCHHSZHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PCIA SPV-3, LLC and CHHSZ Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PCIASPV3LLCAndCHHSZHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_PCIASPV3LLCAndCHHSZHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PCIASPV3LLCAndCHHSZHoldingsLLCMember" xlink:to="lab_arcc_PCIASPV3LLCAndCHHSZHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember_019fed4d-3e56-7861-af2a-5d50128ce468_terseLabel_en-US" xlink:label="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PS Operating Company LLC and PS OP Holdings LLC (fka QC Supply, LLC)</link:label>
    <link:label id="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PS Operating Company LLC and PS OP Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PS Operating Company LLC and PS OP Holdings LLC (fka QC Supply, LLC)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember" xlink:to="lab_arcc_PSOperatingCompanyLLCAndPSOPHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2026M4DividendsMember_019fed4d-3dd3-7584-bf7f-2b2f26659acd_terseLabel_en-US" xlink:label="lab_arcc_O2026M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">April 28, 2026</link:label>
    <link:label id="lab_arcc_O2026M4DividendsMember_label_en-US" xlink:label="lab_arcc_O2026M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2026 M4 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2026M4DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2026M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"></link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2026M4DividendsMember" xlink:href="arcc-20260930.xsd#arcc_O2026M4DividendsMember"/>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_019fed4d-3dd3-7999-a539-d4130242fd4d_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of line of credit commitment</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Commitment Fee Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:to="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CreditFacilityDomain_019fed4d-3dd3-70b1-b16d-4e6b366d4368_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Facility [Domain]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityDomain_label_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Facility [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityDomain" xlink:to="lab_us-gaap_CreditFacilityDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BoltNewcoHoldingsL.P.AndBoltPurchaserLLCMember_019fed4d-3e56-7b85-a939-72360bd392de_terseLabel_en-US" xlink:label="lab_arcc_BoltNewcoHoldingsL.P.AndBoltPurchaserLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bolt Newco Holdings, L.P. and Bolt Purchaser, LLC</link:label>
    <link:label id="lab_arcc_BoltNewcoHoldingsL.P.AndBoltPurchaserLLCMember_label_en-US" xlink:label="lab_arcc_BoltNewcoHoldingsL.P.AndBoltPurchaserLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bolt Newco Holdings, L.P. and Bolt Purchaser, LLC [Member]</link:label>
    <link:label id="lab_arcc_BoltNewcoHoldingsL.P.AndBoltPurchaserLLCMember_documentation_en-US" xlink:label="lab_arcc_BoltNewcoHoldingsL.P.AndBoltPurchaserLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bolt Newco Holdings, L.P. and Bolt Purchaser, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BoltNewcoHoldingsL.P.AndBoltPurchaserLLCMember" xlink:href="arcc-20260930.xsd#arcc_BoltNewcoHoldingsL.P.AndBoltPurchaserLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BoltNewcoHoldingsL.P.AndBoltPurchaserLLCMember" xlink:to="lab_arcc_BoltNewcoHoldingsL.P.AndBoltPurchaserLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareCashPaid_019fed4d-3dd3-739d-b2a3-3414626b5e13_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareCashPaid" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Per share amount (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareCashPaid_label_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareCashPaid" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Dividends, Per Share, Cash Paid</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareCashPaid" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockDividendsPerShareCashPaid"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockDividendsPerShareCashPaid" xlink:to="lab_us-gaap_CommonStockDividendsPerShareCashPaid" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Valuation Assumption Difference, Footnote</link:label>
    <link:label id="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock_label_en-US" xlink:label="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Valuation Assumption Difference, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_EquityValuationAssumptionDifferenceFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:to="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MidCapFinancialInvestmentCorporationMember_01a17ad2-3371-7516-a95c-4bd2fa9d72d9_terseLabel_en-US" xlink:label="lab_arcc_MidCapFinancialInvestmentCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MidCap Financial Investment Corporation</link:label>
    <link:label id="lab_arcc_MidCapFinancialInvestmentCorporationMember_label_en-US" xlink:label="lab_arcc_MidCapFinancialInvestmentCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MidCap Financial Investment Corporation [Member]</link:label>
    <link:label id="lab_arcc_MidCapFinancialInvestmentCorporationMember_documentation_en-US" xlink:label="lab_arcc_MidCapFinancialInvestmentCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MidCap Financial Investment Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MidCapFinancialInvestmentCorporationMember" xlink:href="arcc-20260930.xsd#arcc_MidCapFinancialInvestmentCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MidCapFinancialInvestmentCorporationMember" xlink:to="lab_arcc_MidCapFinancialInvestmentCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_019fed4d-3d41-78ce-b11f-02980ce9eeb1_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Transfers out of Level 3</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityTable_019fed4d-3dd3-7427-ad41-ea0db5dee75e_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Table]</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityTable_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityTable" xlink:to="lab_us-gaap_LineOfCreditFacilityTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember_019fed4d-3e56-77b7-a831-64618b1a44bc_terseLabel_en-US" xlink:label="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ADG, LLC, GEDC Equity, LLC and RC IV GEDC Investor LLC</link:label>
    <link:label id="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember_label_en-US" xlink:label="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ADG, LLC, GEDC Equity, LLC and RC IV GEDC Investor LLC [Member]</link:label>
    <link:label id="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember_documentation_en-US" xlink:label="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ADG, LLC, GEDC Equity, LLC and RC IV GEDC Investor LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember" xlink:href="arcc-20260930.xsd#arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember" xlink:to="lab_arcc_ADGLLCGEDCEquityLLCAndRCIVGEDCInvestorLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MariMiamiIILLCAndSouthFloridaTennisLLCMember_019fed4d-3d41-77d3-b6c7-0c4ced2ce5d2_terseLabel_en-US" xlink:label="lab_arcc_MariMiamiIILLCAndSouthFloridaTennisLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mari Miami II LLC and South Florida Tennis, LLC</link:label>
    <link:label id="lab_arcc_MariMiamiIILLCAndSouthFloridaTennisLLCMember_label_en-US" xlink:label="lab_arcc_MariMiamiIILLCAndSouthFloridaTennisLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mari Miami II LLC and South Florida Tennis, LLC [Member]</link:label>
    <link:label id="lab_arcc_MariMiamiIILLCAndSouthFloridaTennisLLCMember_documentation_en-US" xlink:label="lab_arcc_MariMiamiIILLCAndSouthFloridaTennisLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mari Miami II LLC and South Florida Tennis, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MariMiamiIILLCAndSouthFloridaTennisLLCMember" xlink:href="arcc-20260930.xsd#arcc_MariMiamiIILLCAndSouthFloridaTennisLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MariMiamiIILLCAndSouthFloridaTennisLLCMember" xlink:to="lab_arcc_MariMiamiIILLCAndSouthFloridaTennisLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsPayableCurrentAndNoncurrent_019fed4d-3e56-7f68-9319-ab6207d8251b_verboseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Dividends declared and payable during the period</link:label>
    <link:label id="lab_us-gaap_DividendsPayableCurrentAndNoncurrent_label_en-US" xlink:label="lab_us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:to="lab_us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeAssetTypeExtensibleList_019fed4d-3dd3-778d-bf83-08335a67e1f7_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetTypeExtensibleList" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Asset, Type [Extensible Enumeration]</link:label>
    <link:label id="lab_us-gaap_DerivativeAssetTypeExtensibleList_label_en-US" xlink:label="lab_us-gaap_DerivativeAssetTypeExtensibleList" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Type [Extensible Enumeration]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetTypeExtensibleList" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetTypeExtensibleList"/>
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    <link:label id="lab_arcc_BNPFundingFacilityMember_019fed4d-3d41-7304-a6fc-ac7b2648b57f_terseLabel_en-US" xlink:label="lab_arcc_BNPFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BNP Funding Facility</link:label>
    <link:label id="lab_arcc_BNPFundingFacilityMember_label_en-US" xlink:label="lab_arcc_BNPFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BNP Funding Facility [Member]</link:label>
    <link:label id="lab_arcc_BNPFundingFacilityMember_documentation_en-US" xlink:label="lab_arcc_BNPFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BNP Funding Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BNPFundingFacilityMember" xlink:href="arcc-20260930.xsd#arcc_BNPFundingFacilityMember"/>
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    <link:label id="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis_019fed4d-3dd3-7510-9cd8-06e4042e56d3_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Support to Nonconsolidated Legal Entity [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis_label_en-US" xlink:label="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Support to Nonconsolidated Legal Entity [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialSupportToNonconsolidatedLegalEntityAxis"/>
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    <link:label id="lab_us-gaap_OtherGeneralAndAdministrativeExpense_019fed4d-3dd3-7b5c-ace3-491549bfcfda_terseLabel_en-US" xlink:label="lab_us-gaap_OtherGeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other general and administrative</link:label>
    <link:label id="lab_us-gaap_OtherGeneralAndAdministrativeExpense_label_en-US" xlink:label="lab_us-gaap_OtherGeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other General and Administrative Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherGeneralAndAdministrativeExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherGeneralAndAdministrativeExpense"/>
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    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD1Member_019fed4d-3d42-7f81-b4f9-27e9d2d24e39_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, CAD 1</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD1Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, CAD 1 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD1Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, CAD 1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractCAD1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractCAD1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialHighlightsRollForward_019fed4d-3dd3-7298-ad6f-c3f174ed2d13_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialHighlightsRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Highlights [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialHighlightsRollForward_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialHighlightsRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Highlights [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyFinancialHighlightsRollForward" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyFinancialHighlightsRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyFinancialHighlightsRollForward" xlink:to="lab_us-gaap_InvestmentCompanyFinancialHighlightsRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgPredtrmndFlag_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgPredtrmndFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing Predetermined</link:label>
    <link:label id="lab_ecd_AwardTmgPredtrmndFlag_label_en-US" xlink:label="lab_ecd_AwardTmgPredtrmndFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing Predetermined [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgPredtrmndFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgPredtrmndFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgPredtrmndFlag" xlink:to="lab_ecd_AwardTmgPredtrmndFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ElevationServicesParentHoldingsLLCMember_019fed4d-3d41-7c32-9e85-1e59481277a5_terseLabel_en-US" xlink:label="lab_arcc_ElevationServicesParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Elevation Services Parent Holdings, LLC</link:label>
    <link:label id="lab_arcc_ElevationServicesParentHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_ElevationServicesParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Elevation Services Parent Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_ElevationServicesParentHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_ElevationServicesParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Elevation Services Parent Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ElevationServicesParentHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_ElevationServicesParentHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ElevationServicesParentHoldingsLLCMember" xlink:to="lab_arcc_ElevationServicesParentHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember_019fed4d-3dd3-7955-8d83-6e6a062097e9_terseLabel_en-US" xlink:label="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BCC Blueprint Holdings I, LLC and BCC Blueprint Investments, LLC</link:label>
    <link:label id="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember_label_en-US" xlink:label="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BCC Blueprint Holdings I, LLC and BCC Blueprint Investments, LLC [Member]</link:label>
    <link:label id="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember_documentation_en-US" xlink:label="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BCC Blueprint Holdings I, LLC and BCC Blueprint Investments, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:href="arcc-20260930.xsd#arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:to="lab_arcc_BCCBlueprintHoldingsILLCAndBCCBlueprintInvestmentsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AdjToPeoCompFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AdjToPeoCompFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment To PEO Compensation, Footnote</link:label>
    <link:label id="lab_ecd_AdjToPeoCompFnTextBlock_label_en-US" xlink:label="lab_ecd_AdjToPeoCompFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment To PEO Compensation, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToPeoCompFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AdjToPeoCompFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AdjToPeoCompFnTextBlock" xlink:to="lab_ecd_AdjToPeoCompFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_019fed4d-3d42-7a23-b1b1-1f6da1e37386_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems" xlink:to="lab_us-gaap_FairValueDisclosureAssetAndLiabilityNotMeasuredAtFairValueLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_019fed4d-3e56-70f6-8711-dbcd4b54fe39_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Level 1</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel1Member" xlink:to="lab_us-gaap_FairValueInputsLevel1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredNotProvidedAmountIncludingAdjustments_019fed4d-3dd3-70ff-93a1-2294697fc445_totalLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredNotProvidedAmountIncludingAdjustments" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total unfunded equity commitments</link:label>
    <link:label id="lab_arcc_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredNotProvidedAmountIncludingAdjustments_label_en-US" xlink:label="lab_arcc_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredNotProvidedAmountIncludingAdjustments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount, Including Adjustments</link:label>
    <link:label id="lab_arcc_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredNotProvidedAmountIncludingAdjustments_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredNotProvidedAmountIncludingAdjustments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount, Including Adjustments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredNotProvidedAmountIncludingAdjustments" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredNotProvidedAmountIncludingAdjustments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredNotProvidedAmountIncludingAdjustments" xlink:to="lab_arcc_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredNotProvidedAmountIncludingAdjustments" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SugarPPCBuyerLLCMember_019fed4d-3d41-7f2b-8ca1-cd64dd8d0713_terseLabel_en-US" xlink:label="lab_arcc_SugarPPCBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sugar PPC Buyer LLC</link:label>
    <link:label id="lab_arcc_SugarPPCBuyerLLCMember_label_en-US" xlink:label="lab_arcc_SugarPPCBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sugar PPC Buyer LLC [Member]</link:label>
    <link:label id="lab_arcc_SugarPPCBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_SugarPPCBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sugar PPC Buyer LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SugarPPCBuyerLLCMember" xlink:href="arcc-20260930.xsd#arcc_SugarPPCBuyerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SugarPPCBuyerLLCMember" xlink:to="lab_arcc_SugarPPCBuyerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GainLossOnSaleOfInvestments_01a135f6-0896-7b3e-91d0-e4a75e16db38_verboseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfInvestments" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Realized (loss) gain on sale of investments</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfInvestments_019fed4d-3dd3-7238-b76e-7633a4ec1ee1_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfInvestments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Realized gain (loss) on sale of investments</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfInvestments_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Sale of Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfInvestments" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfInvestments" xlink:to="lab_us-gaap_GainLossOnSaleOfInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SeniorDirectLendingProgramLLCMember_019fed4d-3e56-7890-ba15-71050eb94da6_terseLabel_en-US" xlink:label="lab_arcc_SeniorDirectLendingProgramLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Direct Lending Program, LLC</link:label>
    <link:label id="lab_arcc_SeniorDirectLendingProgramLLCMember_label_en-US" xlink:label="lab_arcc_SeniorDirectLendingProgramLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Direct Lending Program, LLC [Member]</link:label>
    <link:label id="lab_arcc_SeniorDirectLendingProgramLLCMember_documentation_en-US" xlink:label="lab_arcc_SeniorDirectLendingProgramLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Senior Direct Lending Program, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SeniorDirectLendingProgramLLCMember" xlink:href="arcc-20260930.xsd#arcc_SeniorDirectLendingProgramLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SeniorDirectLendingProgramLLCMember" xlink:to="lab_arcc_SeniorDirectLendingProgramLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ShurCoAcquisitionInc.Member_01a154e2-2f9d-7461-acfb-55a3f2874e0a_terseLabel_en-US" xlink:label="lab_arcc_ShurCoAcquisitionInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shur-Co Acquisition, Inc.</link:label>
    <link:label id="lab_arcc_ShurCoAcquisitionInc.Member_label_en-US" xlink:label="lab_arcc_ShurCoAcquisitionInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shur-Co Acquisition, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ShurCoAcquisitionInc.Member_documentation_en-US" xlink:label="lab_arcc_ShurCoAcquisitionInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shur-Co Acquisition, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ShurCoAcquisitionInc.Member" xlink:href="arcc-20260930.xsd#arcc_ShurCoAcquisitionInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ShurCoAcquisitionInc.Member" xlink:to="lab_arcc_ShurCoAcquisitionInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DistributionExpense_019fed4d-3dd3-7fb6-a953-06de852162be_terseLabel_en-US" xlink:label="lab_arcc_DistributionExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Distributions to subordinated notes</link:label>
    <link:label id="lab_arcc_DistributionExpense_label_en-US" xlink:label="lab_arcc_DistributionExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Distribution Expense</link:label>
    <link:label id="lab_arcc_DistributionExpense_documentation_en-US" xlink:label="lab_arcc_DistributionExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Distribution Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DistributionExpense" xlink:href="arcc-20260930.xsd#arcc_DistributionExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DistributionExpense" xlink:to="lab_arcc_DistributionExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember_019fed4d-3dd3-7690-aaed-115324361611_terseLabel_en-US" xlink:label="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cority Software Inc., Cority Software (USA) Inc., and Cority Parent, Inc.</link:label>
    <link:label id="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember_label_en-US" xlink:label="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cority Software Inc., Cority Software (USA) Inc., and Cority Parent, Inc. [Member]</link:label>
    <link:label id="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember_documentation_en-US" xlink:label="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cority Software Inc., Cority Software (USA) Inc., and Cority Parent, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:href="arcc-20260930.xsd#arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:to="lab_arcc_CoritySoftwareIncCoritySoftwareUSAIncAndCorityParentIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_019fed4d-3dd3-7e60-a439-a651517fceb8_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value of Financial Instruments</link:label>
    <link:label id="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_label_en-US" xlink:label="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value of Financial Instruments, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:to="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement_019fed4d-3dd3-7976-b89e-11eec4d23db9_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized Appreciation / (Depreciation)</link:label>
    <link:label id="lab_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement_label_en-US" xlink:label="lab_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:to="lab_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AlcamiCorporationAndZebraBidcoInc.Member_01a157f8-ee10-7753-8873-647ad938c2e6_terseLabel_en-US" xlink:label="lab_arcc_AlcamiCorporationAndZebraBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alcami Corporation and Zebra Bidco, Inc.</link:label>
    <link:label id="lab_arcc_AlcamiCorporationAndZebraBidcoInc.Member_label_en-US" xlink:label="lab_arcc_AlcamiCorporationAndZebraBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Alcami Corporation and Zebra Bidco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_AlcamiCorporationAndZebraBidcoInc.Member_documentation_en-US" xlink:label="lab_arcc_AlcamiCorporationAndZebraBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Alcami Corporation and Zebra Bidco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AlcamiCorporationAndZebraBidcoInc.Member" xlink:href="arcc-20260930.xsd#arcc_AlcamiCorporationAndZebraBidcoInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AlcamiCorporationAndZebraBidcoInc.Member" xlink:to="lab_arcc_AlcamiCorporationAndZebraBidcoInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember_019fed4d-3e56-7580-8bff-717ffaf137cb_terseLabel_en-US" xlink:label="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FS Squared Holding Corp. and FS Squared, LLC</link:label>
    <link:label id="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember_label_en-US" xlink:label="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">FS Squared Holding Corp. and FS Squared, LLC [Member]</link:label>
    <link:label id="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember_documentation_en-US" xlink:label="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">FS Squared Holding Corp. and FS Squared, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember" xlink:href="arcc-20260930.xsd#arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember" xlink:to="lab_arcc_FSSquaredHoldingCorpAndFSSquaredLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HPCCParentInc.AndPatriotContainerCorp.Member_019fed4d-3d42-79d4-883e-612b45d4b92c_terseLabel_en-US" xlink:label="lab_arcc_HPCCParentInc.AndPatriotContainerCorp.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HPCC Parent, Inc. and Patriot Container Corp.</link:label>
    <link:label id="lab_arcc_HPCCParentInc.AndPatriotContainerCorp.Member_label_en-US" xlink:label="lab_arcc_HPCCParentInc.AndPatriotContainerCorp.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HPCC Parent, Inc. and Patriot Container Corp. [Member]</link:label>
    <link:label id="lab_arcc_HPCCParentInc.AndPatriotContainerCorp.Member_documentation_en-US" xlink:label="lab_arcc_HPCCParentInc.AndPatriotContainerCorp.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">HPCC Parent, Inc. and Patriot Container Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HPCCParentInc.AndPatriotContainerCorp.Member" xlink:href="arcc-20260930.xsd#arcc_HPCCParentInc.AndPatriotContainerCorp.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HPCCParentInc.AndPatriotContainerCorp.Member" xlink:to="lab_arcc_HPCCParentInc.AndPatriotContainerCorp.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_JonesFishHatcheriesDistributorsLLCAndPondManagementGroupHoldingsLLCMember_019fed4d-3dd3-7849-ba8c-861a9f098cba_terseLabel_en-US" xlink:label="lab_arcc_JonesFishHatcheriesDistributorsLLCAndPondManagementGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Jones Fish Hatcheries &amp; Distributors, LLC and Pond Management Group Holdings, LLC</link:label>
    <link:label id="lab_arcc_JonesFishHatcheriesDistributorsLLCAndPondManagementGroupHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_JonesFishHatcheriesDistributorsLLCAndPondManagementGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Jones Fish Hatcheries &amp; Distributors, LLC and Pond Management Group Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_JonesFishHatcheriesDistributorsLLCAndPondManagementGroupHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_JonesFishHatcheriesDistributorsLLCAndPondManagementGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Jones Fish Hatcheries &amp; Distributors, LLC and Pond Management Group Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_JonesFishHatcheriesDistributorsLLCAndPondManagementGroupHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_JonesFishHatcheriesDistributorsLLCAndPondManagementGroupHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_JonesFishHatcheriesDistributorsLLCAndPondManagementGroupHoldingsLLCMember" xlink:to="lab_arcc_JonesFishHatcheriesDistributorsLLCAndPondManagementGroupHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FlyWheelAcquirecoIncMember_019fed4d-3d42-71d2-9145-7720615ec0c4_terseLabel_en-US" xlink:label="lab_arcc_FlyWheelAcquirecoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FlyWheel Acquireco, Inc.</link:label>
    <link:label id="lab_arcc_FlyWheelAcquirecoIncMember_label_en-US" xlink:label="lab_arcc_FlyWheelAcquirecoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">FlyWheel Acquireco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_FlyWheelAcquirecoIncMember_documentation_en-US" xlink:label="lab_arcc_FlyWheelAcquirecoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">FlyWheel Acquireco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FlyWheelAcquirecoIncMember" xlink:href="arcc-20260930.xsd#arcc_FlyWheelAcquirecoIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FlyWheelAcquirecoIncMember" xlink:to="lab_arcc_FlyWheelAcquirecoIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_019fed4d-3dd3-79c4-9e30-0b7b69ce5e39_terseLabel_en-US" xlink:label="lab_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term debt securitization</link:label>
    <link:label id="lab_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_label_en-US" xlink:label="lab_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan, Securitized or Asset-Backed Financing Arrangement, Principal Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrincipalAmountOutstandingOnLoansSecuritized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized" xlink:to="lab_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ClearsteadAdvisorsLLCMember_019fed4d-3e56-7e12-887c-8b4ec8b125e6_terseLabel_en-US" xlink:label="lab_arcc_ClearsteadAdvisorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Clearstead Advisors, LLC</link:label>
    <link:label id="lab_arcc_ClearsteadAdvisorsLLCMember_label_en-US" xlink:label="lab_arcc_ClearsteadAdvisorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Clearstead Advisors, LLC [Member]</link:label>
    <link:label id="lab_arcc_ClearsteadAdvisorsLLCMember_documentation_en-US" xlink:label="lab_arcc_ClearsteadAdvisorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Clearstead Advisors, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ClearsteadAdvisorsLLCMember" xlink:href="arcc-20260930.xsd#arcc_ClearsteadAdvisorsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ClearsteadAdvisorsLLCMember" xlink:to="lab_arcc_ClearsteadAdvisorsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember_019fed4d-3dd3-7dfb-a1f4-cb859bee9940_terseLabel_en-US" xlink:label="lab_arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sunk Rock Foundry Partners LP, Hatteras Electrical Manufacturing Holding Company and Sigma Electric Manufacturing Corporation</link:label>
    <link:label id="lab_arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember_label_en-US" xlink:label="lab_arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sunk Rock Foundry Partners LP, Hatteras Electrical Manufacturing Holding Company and Sigma Electric Manufacturing Corporation [Member]</link:label>
    <link:label id="lab_arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember_documentation_en-US" xlink:label="lab_arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sunk Rock Foundry Partners LP, Hatteras Electrical Manufacturing Holding Company and Sigma Electric Manufacturing Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember" xlink:href="arcc-20260930.xsd#arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember" xlink:to="lab_arcc_SunkRockFoundryPartnersLPHatterasElectricalManufacturingHoldingCompanyAndSigmaElectricManufacturingCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtFairValue_019fed4d-3dd3-7e44-abaf-1de1a7543ae2_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair value disclosures of long-term debt</link:label>
    <link:label id="lab_us-gaap_LongTermDebtFairValue_label_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtFairValue" xlink:to="lab_us-gaap_LongTermDebtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WalnutParentIncMember_019fed4d-3d41-70f6-a5ab-b17557cd7572_terseLabel_en-US" xlink:label="lab_arcc_WalnutParentIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Walnut Parent, Inc.</link:label>
    <link:label id="lab_arcc_WalnutParentIncMember_label_en-US" xlink:label="lab_arcc_WalnutParentIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Walnut Parent, Inc. [Member]</link:label>
    <link:label id="lab_arcc_WalnutParentIncMember_documentation_en-US" xlink:label="lab_arcc_WalnutParentIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Walnut Parent, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WalnutParentIncMember" xlink:href="arcc-20260930.xsd#arcc_WalnutParentIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WalnutParentIncMember" xlink:to="lab_arcc_WalnutParentIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember_019fed4d-3e56-76b1-8b63-91d5d2d05643_terseLabel_en-US" xlink:label="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Elemica Parent, Inc. &amp; EZ Elemica Holdings, Inc.</link:label>
    <link:label id="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember_label_en-US" xlink:label="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Elemica Parent, Inc. &amp; EZ Elemica Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Elemica Parent, Inc. &amp; EZ Elemica Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_ElemicaParentIncEZElemicaHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:to="lab_arcc_ElemicaParentIncEZElemicaHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EquinoxHoldingsInc.Member_019fed4d-3d42-752f-bcba-b8c5bd9e03b6_terseLabel_en-US" xlink:label="lab_arcc_EquinoxHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equinox Holdings, Inc.</link:label>
    <link:label id="lab_arcc_EquinoxHoldingsInc.Member_label_en-US" xlink:label="lab_arcc_EquinoxHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equinox Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_EquinoxHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_EquinoxHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equinox Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EquinoxHoldingsInc.Member" xlink:href="arcc-20260930.xsd#arcc_EquinoxHoldingsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EquinoxHoldingsInc.Member" xlink:to="lab_arcc_EquinoxHoldingsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TalonBuyerInc.AndTalonHoldingsSCSPMember_019fed4d-3dd3-73ec-a78b-86dc65353fb9_terseLabel_en-US" xlink:label="lab_arcc_TalonBuyerInc.AndTalonHoldingsSCSPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Talon Buyer Inc. and Talon Holdings SCSP</link:label>
    <link:label id="lab_arcc_TalonBuyerInc.AndTalonHoldingsSCSPMember_label_en-US" xlink:label="lab_arcc_TalonBuyerInc.AndTalonHoldingsSCSPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Talon Buyer Inc. and Talon Holdings SCSP [Member]</link:label>
    <link:label id="lab_arcc_TalonBuyerInc.AndTalonHoldingsSCSPMember_documentation_en-US" xlink:label="lab_arcc_TalonBuyerInc.AndTalonHoldingsSCSPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Talon Buyer Inc. and Talon Holdings SCSP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TalonBuyerInc.AndTalonHoldingsSCSPMember" xlink:href="arcc-20260930.xsd#arcc_TalonBuyerInc.AndTalonHoldingsSCSPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TalonBuyerInc.AndTalonHoldingsSCSPMember" xlink:to="lab_arcc_TalonBuyerInc.AndTalonHoldingsSCSPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskTypeDomain_019fed4d-3d41-7efb-9fcc-5ff7831963ec_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskTypeDomain_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain" xlink:to="lab_us-gaap_ConcentrationRiskTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ESCPPPGHoldingsLLCMember_019fed4d-3d42-7100-956b-96d327c1d9ce_terseLabel_en-US" xlink:label="lab_arcc_ESCPPPGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ESCP PPG Holdings, LLC</link:label>
    <link:label id="lab_arcc_ESCPPPGHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_ESCPPPGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ESCP PPG Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_ESCPPPGHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_ESCPPPGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ESCP PPG Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ESCPPPGHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_ESCPPPGHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ESCPPPGHoldingsLLCMember" xlink:to="lab_arcc_ESCPPPGHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EdmundsGovtechIncMember_019fed4d-3dd3-7d54-94ea-57c95aba1077_terseLabel_en-US" xlink:label="lab_arcc_EdmundsGovtechIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Edmunds Govtech, Inc</link:label>
    <link:label id="lab_arcc_EdmundsGovtechIncMember_label_en-US" xlink:label="lab_arcc_EdmundsGovtechIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Edmunds Govtech, Inc [Member]</link:label>
    <link:label id="lab_arcc_EdmundsGovtechIncMember_documentation_en-US" xlink:label="lab_arcc_EdmundsGovtechIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Edmunds Govtech, Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EdmundsGovtechIncMember" xlink:href="arcc-20260930.xsd#arcc_EdmundsGovtechIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EdmundsGovtechIncMember" xlink:to="lab_arcc_EdmundsGovtechIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CapstoneAcquisitionHoldingsInc.CapstoneLogisticsHoldingsInc.AndCapstoneParentHoldingsLPMember_019fed4d-3e56-7284-8572-4782fff50fa9_terseLabel_en-US" xlink:label="lab_arcc_CapstoneAcquisitionHoldingsInc.CapstoneLogisticsHoldingsInc.AndCapstoneParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capstone Acquisition Holdings, Inc., Capstone Logistics Holdings, Inc. and Capstone Parent Holdings, LP</link:label>
    <link:label id="lab_arcc_CapstoneAcquisitionHoldingsInc.CapstoneLogisticsHoldingsInc.AndCapstoneParentHoldingsLPMember_label_en-US" xlink:label="lab_arcc_CapstoneAcquisitionHoldingsInc.CapstoneLogisticsHoldingsInc.AndCapstoneParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capstone Acquisition Holdings, Inc., Capstone Logistics Holdings, Inc. and Capstone Parent Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_CapstoneAcquisitionHoldingsInc.CapstoneLogisticsHoldingsInc.AndCapstoneParentHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_CapstoneAcquisitionHoldingsInc.CapstoneLogisticsHoldingsInc.AndCapstoneParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Capstone Acquisition Holdings, Inc. and Capstone Parent Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CapstoneAcquisitionHoldingsInc.CapstoneLogisticsHoldingsInc.AndCapstoneParentHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_CapstoneAcquisitionHoldingsInc.CapstoneLogisticsHoldingsInc.AndCapstoneParentHoldingsLPMember"/>
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    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosuresAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract" xlink:to="lab_us-gaap_FairValueDisclosuresAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ContinentalAcquisitionHoldingsInc.AndContinentalGroupHoldingsL.P.Member_019fed4d-3d42-7570-8245-161dcccef371_terseLabel_en-US" xlink:label="lab_arcc_ContinentalAcquisitionHoldingsInc.AndContinentalGroupHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Continental Acquisition Holdings, Inc. and Continental Group Holdings, L.P.</link:label>
    <link:label id="lab_arcc_ContinentalAcquisitionHoldingsInc.AndContinentalGroupHoldingsL.P.Member_label_en-US" xlink:label="lab_arcc_ContinentalAcquisitionHoldingsInc.AndContinentalGroupHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Continental Acquisition Holdings, Inc. and Continental Group Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_ContinentalAcquisitionHoldingsInc.AndContinentalGroupHoldingsL.P.Member_documentation_en-US" xlink:label="lab_arcc_ContinentalAcquisitionHoldingsInc.AndContinentalGroupHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Continental Acquisition Holdings, Inc. and Continental Group Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ContinentalAcquisitionHoldingsInc.AndContinentalGroupHoldingsL.P.Member" xlink:href="arcc-20260930.xsd#arcc_ContinentalAcquisitionHoldingsInc.AndContinentalGroupHoldingsL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ContinentalAcquisitionHoldingsInc.AndContinentalGroupHoldingsL.P.Member" xlink:to="lab_arcc_ContinentalAcquisitionHoldingsInc.AndContinentalGroupHoldingsL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_019fed4d-3dd3-7701-abc5-059ab576353b_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentNameDomain" xlink:to="lab_us-gaap_DebtInstrumentNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DebtInstrumentExtensionOptionTerm_019fed4d-3e56-7df6-8a78-1341641999aa_terseLabel_en-US" xlink:label="lab_arcc_DebtInstrumentExtensionOptionTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term of debt maturity extension option</link:label>
    <link:label id="lab_arcc_DebtInstrumentExtensionOptionTerm_label_en-US" xlink:label="lab_arcc_DebtInstrumentExtensionOptionTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Extension Option, Term</link:label>
    <link:label id="lab_arcc_DebtInstrumentExtensionOptionTerm_documentation_en-US" xlink:label="lab_arcc_DebtInstrumentExtensionOptionTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Extension Option, Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DebtInstrumentExtensionOptionTerm" xlink:href="arcc-20260930.xsd#arcc_DebtInstrumentExtensionOptionTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DebtInstrumentExtensionOptionTerm" xlink:to="lab_arcc_DebtInstrumentExtensionOptionTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCredit_019fed4d-3e56-73f6-a0d3-9abac6b0e50b_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCredit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letter of credit facility outstanding</link:label>
    <link:label id="lab_us-gaap_LineOfCredit_label_en-US" xlink:label="lab_us-gaap_LineOfCredit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Line of Credit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCredit" xlink:to="lab_us-gaap_LineOfCredit" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansMember_019fed4d-3dd3-7043-b801-9605c3de3da7_terseLabel_en-US" xlink:label="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">First lien senior secured loans</link:label>
    <link:label id="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansMember_label_en-US" xlink:label="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, First Lien Senior Secured Loans [Member]</link:label>
    <link:label id="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansMember_documentation_en-US" xlink:label="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Securities, First Lien Senior Secured Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansMember" xlink:href="arcc-20260930.xsd#arcc_DebtSecuritiesFirstLienSeniorSecuredLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansMember" xlink:to="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrExpirationDate_terseLabel_en-US" xlink:label="lab_ecd_TrdArrExpirationDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expiration Date</link:label>
    <link:label id="lab_ecd_TrdArrExpirationDate_label_en-US" xlink:label="lab_ecd_TrdArrExpirationDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement Expiration Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrExpirationDate" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrExpirationDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrExpirationDate" xlink:to="lab_ecd_TrdArrExpirationDate" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationPricePerShareShareConsideration_01a17ad2-3371-703e-9930-c6fd09fce82b_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationPricePerShareShareConsideration" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Implied value, share consideration (in dollars per share)</link:label>
    <link:label id="lab_arcc_BusinessCombinationPricePerShareShareConsideration_label_en-US" xlink:label="lab_arcc_BusinessCombinationPricePerShareShareConsideration" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Price Per Share, Share Consideration</link:label>
    <link:label id="lab_arcc_BusinessCombinationPricePerShareShareConsideration_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationPricePerShareShareConsideration" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Price Per Share, Share Consideration</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationPricePerShareShareConsideration" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationPricePerShareShareConsideration"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationPricePerShareShareConsideration" xlink:to="lab_arcc_BusinessCombinationPricePerShareShareConsideration" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SunrunXanaduIssuer20191LLCAndSunrunXanaduHoldings20191LLCMember_019fed4d-3d42-72da-841f-4869451c732f_terseLabel_en-US" xlink:label="lab_arcc_SunrunXanaduIssuer20191LLCAndSunrunXanaduHoldings20191LLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sunrun Xanadu Issuer 2019-1, LLC and Sunrun Xanadu Holdings 2019-1, LLC</link:label>
    <link:label id="lab_arcc_SunrunXanaduIssuer20191LLCAndSunrunXanaduHoldings20191LLCMember_label_en-US" xlink:label="lab_arcc_SunrunXanaduIssuer20191LLCAndSunrunXanaduHoldings20191LLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sunrun Xanadu Issuer 2019-1, LLC and Sunrun Xanadu Holdings 2019-1, LLC [Member]</link:label>
    <link:label id="lab_arcc_SunrunXanaduIssuer20191LLCAndSunrunXanaduHoldings20191LLCMember_documentation_en-US" xlink:label="lab_arcc_SunrunXanaduIssuer20191LLCAndSunrunXanaduHoldings20191LLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sunrun Xanadu Issuer 2019-1, LLC and Sunrun Xanadu Holdings 2019-1, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SunrunXanaduIssuer20191LLCAndSunrunXanaduHoldings20191LLCMember" xlink:href="arcc-20260930.xsd#arcc_SunrunXanaduIssuer20191LLCAndSunrunXanaduHoldings20191LLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SunrunXanaduIssuer20191LLCAndSunrunXanaduHoldings20191LLCMember" xlink:to="lab_arcc_SunrunXanaduIssuer20191LLCAndSunrunXanaduHoldings20191LLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DerivativeLiabilityBeforeUpfrontPaymentOrReceipt_01a178d9-c3b9-774d-89f3-b264cb0aa384_terseLabel_en-US" xlink:label="lab_arcc_DerivativeLiabilityBeforeUpfrontPaymentOrReceipt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative, interest rate swap, value (liability)</link:label>
    <link:label id="lab_arcc_DerivativeLiabilityBeforeUpfrontPaymentOrReceipt_label_en-US" xlink:label="lab_arcc_DerivativeLiabilityBeforeUpfrontPaymentOrReceipt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, before Upfront Payment or Receipt</link:label>
    <link:label id="lab_arcc_DerivativeLiabilityBeforeUpfrontPaymentOrReceipt_documentation_en-US" xlink:label="lab_arcc_DerivativeLiabilityBeforeUpfrontPaymentOrReceipt" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Derivative Liability, before Upfront Payment or Receipt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DerivativeLiabilityBeforeUpfrontPaymentOrReceipt" xlink:href="arcc-20260930.xsd#arcc_DerivativeLiabilityBeforeUpfrontPaymentOrReceipt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DerivativeLiabilityBeforeUpfrontPaymentOrReceipt" xlink:to="lab_arcc_DerivativeLiabilityBeforeUpfrontPaymentOrReceipt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember_019fed4d-3dd3-7ca0-b511-59caf3f1e129_terseLabel_en-US" xlink:label="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sunrun Atlas Depositor 2019-2, LLC and Sunrun Atlas Holdings 2019-2, LLC</link:label>
    <link:label id="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember_label_en-US" xlink:label="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sunrun Atlas Depositor 2019-2, LLC and Sunrun Atlas Holdings 2019-2, LLC [Member]</link:label>
    <link:label id="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember_documentation_en-US" xlink:label="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sunrun Atlas Depositor 2019-2, LLC and Sunrun Atlas Holdings 2019-2, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember" xlink:href="arcc-20260930.xsd#arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember" xlink:to="lab_arcc_SunrunAtlasDepositor20192LLCAndSunrunAtlasHoldings20192LLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EssorGroupAssetsLLCAndEssorGroupInc.Member_01a154c8-09c6-7432-aa91-b61f41d7dea6_terseLabel_en-US" xlink:label="lab_arcc_EssorGroupAssetsLLCAndEssorGroupInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Essor Group Assets LLC and Essor Group, Inc.</link:label>
    <link:label id="lab_arcc_EssorGroupAssetsLLCAndEssorGroupInc.Member_label_en-US" xlink:label="lab_arcc_EssorGroupAssetsLLCAndEssorGroupInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Essor Group Assets LLC and Essor Group, Inc. [Member]</link:label>
    <link:label id="lab_arcc_EssorGroupAssetsLLCAndEssorGroupInc.Member_documentation_en-US" xlink:label="lab_arcc_EssorGroupAssetsLLCAndEssorGroupInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Essor Group Assets LLC and Essor Group, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EssorGroupAssetsLLCAndEssorGroupInc.Member" xlink:href="arcc-20260930.xsd#arcc_EssorGroupAssetsLLCAndEssorGroupInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EssorGroupAssetsLLCAndEssorGroupInc.Member" xlink:to="lab_arcc_EssorGroupAssetsLLCAndEssorGroupInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RodeoAcquisitionCoLLCMember_019fed4d-3d42-7484-aa6b-959bc4b9abca_terseLabel_en-US" xlink:label="lab_arcc_RodeoAcquisitionCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rodeo AcquisitionCo LLC</link:label>
    <link:label id="lab_arcc_RodeoAcquisitionCoLLCMember_label_en-US" xlink:label="lab_arcc_RodeoAcquisitionCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rodeo AcquisitionCo LLC [Member]</link:label>
    <link:label id="lab_arcc_RodeoAcquisitionCoLLCMember_documentation_en-US" xlink:label="lab_arcc_RodeoAcquisitionCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rodeo AcquisitionCo LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RodeoAcquisitionCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_RodeoAcquisitionCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RodeoAcquisitionCoLLCMember" xlink:to="lab_arcc_RodeoAcquisitionCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DivisionsHoldingCorporationDivisionsInc.AndRCVTecmoInvestorLLCMember_019fed4d-3dd3-7cf0-b4ac-8f595a4c1bec_terseLabel_en-US" xlink:label="lab_arcc_DivisionsHoldingCorporationDivisionsInc.AndRCVTecmoInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Divisions Holding Corporation, Divisions, Inc. and RC V Tecmo Investor LLC</link:label>
    <link:label id="lab_arcc_DivisionsHoldingCorporationDivisionsInc.AndRCVTecmoInvestorLLCMember_label_en-US" xlink:label="lab_arcc_DivisionsHoldingCorporationDivisionsInc.AndRCVTecmoInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Divisions Holding Corporation, Divisions, Inc. and RC V Tecmo Investor LLC [Member]</link:label>
    <link:label id="lab_arcc_DivisionsHoldingCorporationDivisionsInc.AndRCVTecmoInvestorLLCMember_documentation_en-US" xlink:label="lab_arcc_DivisionsHoldingCorporationDivisionsInc.AndRCVTecmoInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Divisions Holding Corporation, Divisions, Inc. and RC V Tecmo Investor LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DivisionsHoldingCorporationDivisionsInc.AndRCVTecmoInvestorLLCMember" xlink:href="arcc-20260930.xsd#arcc_DivisionsHoldingCorporationDivisionsInc.AndRCVTecmoInvestorLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DivisionsHoldingCorporationDivisionsInc.AndRCVTecmoInvestorLLCMember" xlink:to="lab_arcc_DivisionsHoldingCorporationDivisionsInc.AndRCVTecmoInvestorLLCMember" xlink:type="arc" order="1"/>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationClosingPriceScenarioTwoMember" xlink:to="lab_arcc_BusinessCombinationClosingPriceScenarioTwoMember" xlink:type="arc" order="1"/>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubordinatedDebtMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubordinatedDebtMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedDebtMember" xlink:to="lab_us-gaap_SubordinatedDebtMember" xlink:type="arc" order="1"/>
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    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_AffiliatedEntityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_AffiliatedEntityMember" xlink:to="lab_srt_AffiliatedEntityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NonQualifyingAssetsMember_019fed4d-3dd3-7d96-a0b2-19931e43276e_terseLabel_en-US" xlink:label="lab_arcc_NonQualifyingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-qualifying assets</link:label>
    <link:label id="lab_arcc_NonQualifyingAssetsMember_label_en-US" xlink:label="lab_arcc_NonQualifyingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Qualifying Assets [Member]</link:label>
    <link:label id="lab_arcc_NonQualifyingAssetsMember_documentation_en-US" xlink:label="lab_arcc_NonQualifyingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non-Qualifying Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NonQualifyingAssetsMember" xlink:href="arcc-20260930.xsd#arcc_NonQualifyingAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NonQualifyingAssetsMember" xlink:to="lab_arcc_NonQualifyingAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_KairosBidcoLimitedMember_019fed4d-3dd3-7ff3-a0fd-71c2c3ab2e29_terseLabel_en-US" xlink:label="lab_arcc_KairosBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Kairos Bidco Limited</link:label>
    <link:label id="lab_arcc_KairosBidcoLimitedMember_label_en-US" xlink:label="lab_arcc_KairosBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Kairos Bidco Limited [Member]</link:label>
    <link:label id="lab_arcc_KairosBidcoLimitedMember_documentation_en-US" xlink:label="lab_arcc_KairosBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Kairos Bidco Limited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KairosBidcoLimitedMember" xlink:href="arcc-20260930.xsd#arcc_KairosBidcoLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KairosBidcoLimitedMember" xlink:to="lab_arcc_KairosBidcoLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AggtPnsnAdjsSvcCstMember_terseLabel_en-US" xlink:label="lab_ecd_AggtPnsnAdjsSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Pension Adjustments Service Cost</link:label>
    <link:label id="lab_ecd_AggtPnsnAdjsSvcCstMember_label_en-US" xlink:label="lab_ecd_AggtPnsnAdjsSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Pension Adjustments Service Cost [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtPnsnAdjsSvcCstMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AggtPnsnAdjsSvcCstMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AggtPnsnAdjsSvcCstMember" xlink:to="lab_ecd_AggtPnsnAdjsSvcCstMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_January2038CLONotesMember_019fed4d-3dd3-7612-84b0-cd4e4809dec2_terseLabel_en-US" xlink:label="lab_arcc_January2038CLONotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">January 2038 CLO Notes</link:label>
    <link:label id="lab_arcc_January2038CLONotesMember_label_en-US" xlink:label="lab_arcc_January2038CLONotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">January 2038 CLO Notes [Member]</link:label>
    <link:label id="lab_arcc_January2038CLONotesMember_documentation_en-US" xlink:label="lab_arcc_January2038CLONotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">January 2038 CLO Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_January2038CLONotesMember" xlink:href="arcc-20260930.xsd#arcc_January2038CLONotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_January2038CLONotesMember" xlink:to="lab_arcc_January2038CLONotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeExceedsCatchUpThresholdMember_019fed4d-3d42-7062-9339-323c20b6fee6_terseLabel_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeExceedsCatchUpThresholdMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incentive Rate, Pre-Incentive Fee Net Investment Income Exceeds Catch-Up Threshold</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeExceedsCatchUpThresholdMember_label_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeExceedsCatchUpThresholdMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income Exceeds Catch-Up Threshold [Member]</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeExceedsCatchUpThresholdMember_documentation_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeExceedsCatchUpThresholdMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income Exceeds Catch-Up Threshold</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeExceedsCatchUpThresholdMember" xlink:href="arcc-20260930.xsd#arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeExceedsCatchUpThresholdMember"/>
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_019fed4d-3dd3-7373-82d8-e87748395a0a_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net proceeds from issuance of common stock</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Common Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember_019fed4d-3e56-7fca-8600-46eeb4fe3388_terseLabel_en-US" xlink:label="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pathstone Family Office LLC and Kelso XI Tailwind Co-Investment, L.P.</link:label>
    <link:label id="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember_label_en-US" xlink:label="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pathstone Family Office LLC and Kelso XI Tailwind Co-Investment, L.P. [Member]</link:label>
    <link:label id="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember_documentation_en-US" xlink:label="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pathstone Family Office LLC and Kelso XI Tailwind Co-Investment, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:href="arcc-20260930.xsd#arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:to="lab_arcc_PathstoneFamilyOfficeLLCAndKelsoXITailwindCoInvestmentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_019fed4d-3d42-7b8f-9109-5c36090b29b8_totalLabel_en-US" xlink:label="lab_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">NET INVESTMENT INCOME</link:label>
    <link:label id="lab_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_019fed4d-3d42-7822-bd75-168df62e061e_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net investment income</link:label>
    <link:label id="lab_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_label_en-US" xlink:label="lab_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Income, Operating, after Expense and Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:to="lab_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RelatedPartyTransactionAxis_019fed4d-3e56-7f63-8283-5459c3ab45fc_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Axis]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionAxis_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis" xlink:to="lab_us-gaap_RelatedPartyTransactionAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_January2038CLOSubordinatedNotesMember_019fed4d-3e55-775c-a755-8ba96c6487cd_terseLabel_en-US" xlink:label="lab_arcc_January2038CLOSubordinatedNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">January 2038 CLO Subordinated Notes</link:label>
    <link:label id="lab_arcc_January2038CLOSubordinatedNotesMember_label_en-US" xlink:label="lab_arcc_January2038CLOSubordinatedNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">January 2038 CLO Subordinated Notes [Member]</link:label>
    <link:label id="lab_arcc_January2038CLOSubordinatedNotesMember_documentation_en-US" xlink:label="lab_arcc_January2038CLOSubordinatedNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">January 2038 CLO Subordinated Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_January2038CLOSubordinatedNotesMember" xlink:href="arcc-20260930.xsd#arcc_January2038CLOSubordinatedNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_January2038CLOSubordinatedNotesMember" xlink:to="lab_arcc_January2038CLOSubordinatedNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FEHGroupLLCMember_019fed4d-3d42-7a30-80b6-1356746f3fae_terseLabel_en-US" xlink:label="lab_arcc_FEHGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FEH Group, LLC</link:label>
    <link:label id="lab_arcc_FEHGroupLLCMember_label_en-US" xlink:label="lab_arcc_FEHGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">FEH Group, LLC [Member]</link:label>
    <link:label id="lab_arcc_FEHGroupLLCMember_documentation_en-US" xlink:label="lab_arcc_FEHGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">FEH Group, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FEHGroupLLCMember" xlink:href="arcc-20260930.xsd#arcc_FEHGroupLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FEHGroupLLCMember" xlink:to="lab_arcc_FEHGroupLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AeriTekGlobalUSAcquisitionInc.AeriTekGlobalHoldingsLLCAndMinusFortyQBDCorpMember_019fed4d-3d41-7e06-b06e-7d31fd76e96f_terseLabel_en-US" xlink:label="lab_arcc_AeriTekGlobalUSAcquisitionInc.AeriTekGlobalHoldingsLLCAndMinusFortyQBDCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AeriTek Global US Acquisition Inc., AeriTek Global Holdings LLC, and Minus Forty QBD Corp</link:label>
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    <link:label id="lab_arcc_AeriTekGlobalUSAcquisitionInc.AeriTekGlobalHoldingsLLCAndMinusFortyQBDCorpMember_documentation_en-US" xlink:label="lab_arcc_AeriTekGlobalUSAcquisitionInc.AeriTekGlobalHoldingsLLCAndMinusFortyQBDCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">AeriTek Global US Acquisition Inc., AeriTek Global Holdings LLC, and Minus Forty QBD Corp</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AeriTekGlobalUSAcquisitionInc.AeriTekGlobalHoldingsLLCAndMinusFortyQBDCorpMember" xlink:to="lab_arcc_AeriTekGlobalUSAcquisitionInc.AeriTekGlobalHoldingsLLCAndMinusFortyQBDCorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProofpointInc.Member_019fed4d-3e56-71f7-9f86-53a9def88d7e_terseLabel_en-US" xlink:label="lab_arcc_ProofpointInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proofpoint, Inc.</link:label>
    <link:label id="lab_arcc_ProofpointInc.Member_label_en-US" xlink:label="lab_arcc_ProofpointInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proofpoint, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ProofpointInc.Member_documentation_en-US" xlink:label="lab_arcc_ProofpointInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Proofpoint, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProofpointInc.Member" xlink:href="arcc-20260930.xsd#arcc_ProofpointInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProofpointInc.Member" xlink:to="lab_arcc_ProofpointInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentDomain_019fed4d-3d41-7126-8b82-061ab37ceae3_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:label id="lab_us-gaap_SegmentDomain_label_en-US" xlink:label="lab_us-gaap_SegmentDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentDomain" xlink:to="lab_us-gaap_SegmentDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestRateSwapMember_019fed4d-3dd3-782a-a6dc-3677fa1e7fe9_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate swap</link:label>
    <link:label id="lab_us-gaap_InterestRateSwapMember_label_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateSwapMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateSwapMember" xlink:to="lab_us-gaap_InterestRateSwapMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_JSGIIInc.AndCheckersUSAInc.Member_01a158df-1ea9-7ce0-9c3e-c66f364ba81a_terseLabel_en-US" xlink:label="lab_arcc_JSGIIInc.AndCheckersUSAInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">JSG II, Inc. and Checkers USA, Inc.</link:label>
    <link:label id="lab_arcc_JSGIIInc.AndCheckersUSAInc.Member_label_en-US" xlink:label="lab_arcc_JSGIIInc.AndCheckersUSAInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">JSG II, Inc. and Checkers USA, Inc. [Member]</link:label>
    <link:label id="lab_arcc_JSGIIInc.AndCheckersUSAInc.Member_documentation_en-US" xlink:label="lab_arcc_JSGIIInc.AndCheckersUSAInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">JSG II, Inc. and Checkers USA, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_JSGIIInc.AndCheckersUSAInc.Member" xlink:href="arcc-20260930.xsd#arcc_JSGIIInc.AndCheckersUSAInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_JSGIIInc.AndCheckersUSAInc.Member" xlink:to="lab_arcc_JSGIIInc.AndCheckersUSAInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_019fed4d-3d42-7ca7-98b0-eaa1fd57b295_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DEBT</link:label>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureTextBlock" xlink:to="lab_us-gaap_DebtDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ExpereoUSAInc.AndRistrettoBidcoB.V.Member_019fed4d-3e56-7e39-b027-a978fdbdcb56_terseLabel_en-US" xlink:label="lab_arcc_ExpereoUSAInc.AndRistrettoBidcoB.V.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expereo USA, Inc. and Ristretto Bidco B.V.</link:label>
    <link:label id="lab_arcc_ExpereoUSAInc.AndRistrettoBidcoB.V.Member_label_en-US" xlink:label="lab_arcc_ExpereoUSAInc.AndRistrettoBidcoB.V.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Expereo USA, Inc. and Ristretto Bidco B.V. [Member]</link:label>
    <link:label id="lab_arcc_ExpereoUSAInc.AndRistrettoBidcoB.V.Member_documentation_en-US" xlink:label="lab_arcc_ExpereoUSAInc.AndRistrettoBidcoB.V.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Expereo USA, Inc. and Ristretto Bidco B.V.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ExpereoUSAInc.AndRistrettoBidcoB.V.Member" xlink:href="arcc-20260930.xsd#arcc_ExpereoUSAInc.AndRistrettoBidcoB.V.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ExpereoUSAInc.AndRistrettoBidcoB.V.Member" xlink:to="lab_arcc_ExpereoUSAInc.AndRistrettoBidcoB.V.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SubordinatedDebtRelatedParty_019fed4d-3d41-763c-9f24-ed6ee8700709_terseLabel_en-US" xlink:label="lab_arcc_SubordinatedDebtRelatedParty" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated note from ARCC</link:label>
    <link:label id="lab_arcc_SubordinatedDebtRelatedParty_label_en-US" xlink:label="lab_arcc_SubordinatedDebtRelatedParty" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Debt, Related Party</link:label>
    <link:label id="lab_arcc_SubordinatedDebtRelatedParty_documentation_en-US" xlink:label="lab_arcc_SubordinatedDebtRelatedParty" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subordinated Debt, Related Party</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SubordinatedDebtRelatedParty" xlink:href="arcc-20260930.xsd#arcc_SubordinatedDebtRelatedParty"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SubordinatedDebtRelatedParty" xlink:to="lab_arcc_SubordinatedDebtRelatedParty" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FeverLabsInc.Member_019fed4d-3e56-75f5-a4c0-86fb842cd528_terseLabel_en-US" xlink:label="lab_arcc_FeverLabsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fever Labs, Inc.</link:label>
    <link:label id="lab_arcc_FeverLabsInc.Member_label_en-US" xlink:label="lab_arcc_FeverLabsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fever Labs, Inc. [Member]</link:label>
    <link:label id="lab_arcc_FeverLabsInc.Member_documentation_en-US" xlink:label="lab_arcc_FeverLabsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fever Labs, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FeverLabsInc.Member" xlink:href="arcc-20260930.xsd#arcc_FeverLabsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FeverLabsInc.Member" xlink:to="lab_arcc_FeverLabsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_UnifiAviationNorthAmericaLLCAndUnifiAviationCanadaInc.Member_019fed4d-3dd3-7557-9b4c-4bd0765b4b76_terseLabel_en-US" xlink:label="lab_arcc_UnifiAviationNorthAmericaLLCAndUnifiAviationCanadaInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unifi Aviation North America LLC and Unifi Aviation Canada, Inc.</link:label>
    <link:label id="lab_arcc_UnifiAviationNorthAmericaLLCAndUnifiAviationCanadaInc.Member_label_en-US" xlink:label="lab_arcc_UnifiAviationNorthAmericaLLCAndUnifiAviationCanadaInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unifi Aviation North America LLC and Unifi Aviation Canada, Inc. [Member]</link:label>
    <link:label id="lab_arcc_UnifiAviationNorthAmericaLLCAndUnifiAviationCanadaInc.Member_documentation_en-US" xlink:label="lab_arcc_UnifiAviationNorthAmericaLLCAndUnifiAviationCanadaInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unifi Aviation North America LLC and Unifi Aviation Canada, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_UnifiAviationNorthAmericaLLCAndUnifiAviationCanadaInc.Member" xlink:href="arcc-20260930.xsd#arcc_UnifiAviationNorthAmericaLLCAndUnifiAviationCanadaInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_UnifiAviationNorthAmericaLLCAndUnifiAviationCanadaInc.Member" xlink:to="lab_arcc_UnifiAviationNorthAmericaLLCAndUnifiAviationCanadaInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis_019fed4d-3d42-7abe-a283-9271424a466b_terseLabel_en-US" xlink:label="lab_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Open Forward Foreign Currency Contract, Identifier [Axis]</link:label>
    <link:label id="lab_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis_label_en-US" xlink:label="lab_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Open Forward Foreign Currency Contract, Identifier [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:to="lab_us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ShoesForCrewsGlobalLLCAndShoesForCrewsHoldingsLLCMember_019fed4d-3dd3-7d84-a085-b607c734bd3a_terseLabel_en-US" xlink:label="lab_arcc_ShoesForCrewsGlobalLLCAndShoesForCrewsHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shoes For Crews Global, LLC and Shoes For Crews Holdings, LLC</link:label>
    <link:label id="lab_arcc_ShoesForCrewsGlobalLLCAndShoesForCrewsHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_ShoesForCrewsGlobalLLCAndShoesForCrewsHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shoes For Crews Global, LLC and Shoes For Crews Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_ShoesForCrewsGlobalLLCAndShoesForCrewsHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_ShoesForCrewsGlobalLLCAndShoesForCrewsHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shoes For Crews Global, LLC and Shoes For Crews Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ShoesForCrewsGlobalLLCAndShoesForCrewsHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_ShoesForCrewsGlobalLLCAndShoesForCrewsHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ShoesForCrewsGlobalLLCAndShoesForCrewsHoldingsLLCMember" xlink:to="lab_arcc_ShoesForCrewsGlobalLLCAndShoesForCrewsHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeoActuallyPaidCompAmt_terseLabel_en-US" xlink:label="lab_ecd_PeoActuallyPaidCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO Actually Paid Compensation Amount</link:label>
    <link:label id="lab_ecd_PeoActuallyPaidCompAmt_label_en-US" xlink:label="lab_ecd_PeoActuallyPaidCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO Actually Paid Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoActuallyPaidCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PeoActuallyPaidCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoActuallyPaidCompAmt" xlink:to="lab_ecd_PeoActuallyPaidCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SecuredDebtMember_019fed4d-3e56-7daf-b419-6041f2559c44_verboseLabel_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Secured debt</link:label>
    <link:label id="lab_us-gaap_SecuredDebtMember_019fed4d-3e56-7b31-bc8a-494def4404d0_terseLabel_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term loan tranche</link:label>
    <link:label id="lab_us-gaap_SecuredDebtMember_label_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Secured Debt [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuredDebtMember" xlink:to="lab_us-gaap_SecuredDebtMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PetvisorHoldingsLLCMember_019fed4d-3e56-7d6a-9414-728138dfaafa_terseLabel_en-US" xlink:label="lab_arcc_PetvisorHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Petvisor Holdings, LLC</link:label>
    <link:label id="lab_arcc_PetvisorHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PetvisorHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Petvisor Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_PetvisorHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PetvisorHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Petvisor Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PetvisorHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_PetvisorHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PetvisorHoldingsLLCMember" xlink:to="lab_arcc_PetvisorHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BRPJKProduceLLCMember_019fed4d-3dd3-785c-9246-257e0e13748a_terseLabel_en-US" xlink:label="lab_arcc_BRPJKProduceLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BR PJK Produce, LLC</link:label>
    <link:label id="lab_arcc_BRPJKProduceLLCMember_label_en-US" xlink:label="lab_arcc_BRPJKProduceLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BR PJK Produce, LLC [Member]</link:label>
    <link:label id="lab_arcc_BRPJKProduceLLCMember_documentation_en-US" xlink:label="lab_arcc_BRPJKProduceLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BR PJK Produce, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BRPJKProduceLLCMember" xlink:href="arcc-20260930.xsd#arcc_BRPJKProduceLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BRPJKProduceLLCMember" xlink:to="lab_arcc_BRPJKProduceLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CostsAndExpenses_019fed4d-3e56-7926-9162-a0f2301e5256_totalLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpenses" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total expenses</link:label>
    <link:label id="lab_us-gaap_CostsAndExpenses_label_en-US" xlink:label="lab_us-gaap_CostsAndExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Costs and Expenses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostsAndExpenses" xlink:to="lab_us-gaap_CostsAndExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HHStellaIncAndBedrockParentHoldingsLPMember_019fed4d-3d42-7bac-b261-455e9152312c_terseLabel_en-US" xlink:label="lab_arcc_HHStellaIncAndBedrockParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HH-Stella, Inc. and Bedrock Parent Holdings, LP</link:label>
    <link:label id="lab_arcc_HHStellaIncAndBedrockParentHoldingsLPMember_label_en-US" xlink:label="lab_arcc_HHStellaIncAndBedrockParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HH-Stella, Inc. and Bedrock Parent Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_HHStellaIncAndBedrockParentHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_HHStellaIncAndBedrockParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">HH-Stella, Inc. and Bedrock Parent Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HHStellaIncAndBedrockParentHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_HHStellaIncAndBedrockParentHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HHStellaIncAndBedrockParentHoldingsLPMember" xlink:to="lab_arcc_HHStellaIncAndBedrockParentHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyFundedCommitmentsNet_019fed4d-3dd3-76ec-a1d7-c2d7d30cff6d_negatedTerseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less: funded commitments</link:label>
    <link:label id="lab_arcc_InvestmentCompanyFundedCommitmentsNet_label_en-US" xlink:label="lab_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Funded Commitments, Net</link:label>
    <link:label id="lab_arcc_InvestmentCompanyFundedCommitmentsNet_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Funded Commitments, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyFundedCommitmentsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:to="lab_arcc_InvestmentCompanyFundedCommitmentsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_019fed4d-3e56-7575-b341-2c3b61896fd8_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Effective Stated Interest Rate</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_019fed4d-3e56-7721-82f8-ce66e519ac8e_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective stated interest rate</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquity_019fed4d-3dd3-700b-8d80-bd077a33d934_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total stockholders&#8217; equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_019fed4d-3dd3-77ec-9d16-e61ed841bb37_periodStartLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_019fed4d-3dd3-7adb-8fff-357866229f86_periodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_019fed4d-3dd3-705d-946c-e511d5eae713_verboseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net assets at end of period</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity, Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity" xlink:to="lab_us-gaap_StockholdersEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount_019fed4d-3dd3-760d-a9bd-b138ab4a870a_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less: commitments substantially at discretion of the Company</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount_019fed4d-3dd3-709d-ad6b-e6518fe95826_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less: equity commitments substantially at discretion of the Company</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Support to Investee, Discretionary, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount" xlink:to="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeDiscretionaryAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MinistryBrandsHoldingsLLCAndRCPMBInvestmentsBLPMember_019fed4d-3e56-76e1-a097-60e3e2ed1580_terseLabel_en-US" xlink:label="lab_arcc_MinistryBrandsHoldingsLLCAndRCPMBInvestmentsBLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ministry Brands Holdings, LLC and RCP MB Investments B, L.P.</link:label>
    <link:label id="lab_arcc_MinistryBrandsHoldingsLLCAndRCPMBInvestmentsBLPMember_label_en-US" xlink:label="lab_arcc_MinistryBrandsHoldingsLLCAndRCPMBInvestmentsBLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ministry Brands Holdings, LLC and RCP MB Investments B, L.P. [Member]</link:label>
    <link:label id="lab_arcc_MinistryBrandsHoldingsLLCAndRCPMBInvestmentsBLPMember_documentation_en-US" xlink:label="lab_arcc_MinistryBrandsHoldingsLLCAndRCPMBInvestmentsBLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ministry Brands Holdings, LLC and RCP MB Investments B, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MinistryBrandsHoldingsLLCAndRCPMBInvestmentsBLPMember" xlink:href="arcc-20260930.xsd#arcc_MinistryBrandsHoldingsLLCAndRCPMBInvestmentsBLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MinistryBrandsHoldingsLLCAndRCPMBInvestmentsBLPMember" xlink:to="lab_arcc_MinistryBrandsHoldingsLLCAndRCPMBInvestmentsBLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FaradayBuyerLLCMember_019fed4d-3e56-783f-bb36-9f99eaa6376b_terseLabel_en-US" xlink:label="lab_arcc_FaradayBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Faraday Buyer, LLC</link:label>
    <link:label id="lab_arcc_FaradayBuyerLLCMember_label_en-US" xlink:label="lab_arcc_FaradayBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Faraday Buyer, LLC [Member]</link:label>
    <link:label id="lab_arcc_FaradayBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_FaradayBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Faraday Buyer, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FaradayBuyerLLCMember" xlink:href="arcc-20260930.xsd#arcc_FaradayBuyerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FaradayBuyerLLCMember" xlink:to="lab_arcc_FaradayBuyerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PeopleCorporationMember_019fed4d-3dd3-7c71-a0a4-f02aa318ac90_terseLabel_en-US" xlink:label="lab_arcc_PeopleCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">People Corporation</link:label>
    <link:label id="lab_arcc_PeopleCorporationMember_label_en-US" xlink:label="lab_arcc_PeopleCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">People Corporation [Member]</link:label>
    <link:label id="lab_arcc_PeopleCorporationMember_documentation_en-US" xlink:label="lab_arcc_PeopleCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">People Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PeopleCorporationMember" xlink:href="arcc-20260930.xsd#arcc_PeopleCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PeopleCorporationMember" xlink:to="lab_arcc_PeopleCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetsAbstract_019fed4d-3d41-7d86-8096-97899c8595a3_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ASSETS</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_019fed4d-3d41-7b8f-b97e-f8cb502fb6aa_verboseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="lab_us-gaap_AssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MeasurementInputEbitdaMultipleMember_019fed4d-3dd3-7849-b7ae-cc6c58f15b93_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputEbitdaMultipleMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBITDA multiple</link:label>
    <link:label id="lab_us-gaap_MeasurementInputEbitdaMultipleMember_label_en-US" xlink:label="lab_us-gaap_MeasurementInputEbitdaMultipleMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input, EBITDA Multiple [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputEbitdaMultipleMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputEbitdaMultipleMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputEbitdaMultipleMember" xlink:to="lab_us-gaap_MeasurementInputEbitdaMultipleMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedAtFairValueYield_019fed4d-3d42-782b-9453-71f439cc8a20_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedAtFairValueYield" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Yield on investment, at fair value</link:label>
    <link:label id="lab_arcc_InvestmentOwnedAtFairValueYield_label_en-US" xlink:label="lab_arcc_InvestmentOwnedAtFairValueYield" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, at Fair Value, Yield</link:label>
    <link:label id="lab_arcc_InvestmentOwnedAtFairValueYield_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedAtFairValueYield" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, at Fair Value, Yield</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedAtFairValueYield" xlink:href="arcc-20260930.xsd#arcc_InvestmentOwnedAtFairValueYield"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedAtFairValueYield" xlink:to="lab_arcc_InvestmentOwnedAtFairValueYield" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember_019fed4d-3e56-7bf7-b169-d3317da87b15_terseLabel_en-US" xlink:label="lab_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Project Potter Buyer, LLC and Project Potter Parent, L.P.</link:label>
    <link:label id="lab_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember_label_en-US" xlink:label="lab_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Project Potter Buyer, LLC and Project Potter Parent, L.P. [Member]</link:label>
    <link:label id="lab_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember_documentation_en-US" xlink:label="lab_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Project Potter Buyer, LLC and Project Potter Parent, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember" xlink:href="arcc-20260930.xsd#arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember" xlink:to="lab_arcc_ProjectPotterBuyerLLCAndProjectPotterParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember_019fed4d-3dd3-75e9-8a2d-1cf704e6da8f_terseLabel_en-US" xlink:label="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Clarion Home Services Group, LLC and LBC Breeze Holdings LLC</link:label>
    <link:label id="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Clarion Home Services Group, LLC and LBC Breeze Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Clarion Home Services Group, LLC and LBC Breeze Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:to="lab_arcc_ClarionHomeServicesGroupLLCAndLBCBreezeHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioThreeMember_01a17ad2-9252-7aec-8dad-cb4ece3c7eb0_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioThreeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario Three</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioThreeMember_label_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioThreeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario Three [Member]</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioThreeMember_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioThreeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario Three</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationClosingPriceScenarioThreeMember" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationClosingPriceScenarioThreeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationClosingPriceScenarioThreeMember" xlink:to="lab_arcc_BusinessCombinationClosingPriceScenarioThreeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember_019fed4d-3dd3-7275-a55f-ba0591db3e55_terseLabel_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incentive Rate, Pre-Incentive Fee Net Investment Income Below Catch-Up Threshold</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember_label_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income Below Catch-Up Threshold [Member]</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember_documentation_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income Below Catch-Up Threshold</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember" xlink:href="arcc-20260930.xsd#arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember" xlink:to="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRatePreIncentiveFeeNetInvestmentIncomeBelowCatchUpThresholdMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember_019fed4d-3dd3-72fa-af12-6f796e577973_terseLabel_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incentive Rate, Quarterly Hurdle Rate</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember_label_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Quarterly Hurdle Rate [Member]</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember_documentation_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Quarterly Hurdle Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:href="arcc-20260930.xsd#arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:to="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyHurdleRateMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_InsiderTradingPoliciesProcLineItems_label_en-US" xlink:label="lab_ecd_InsiderTradingPoliciesProcLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insider Trading Policies and Procedures [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_InsiderTradingPoliciesProcLineItems" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_InsiderTradingPoliciesProcLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_InsiderTradingPoliciesProcLineItems" xlink:to="lab_ecd_InsiderTradingPoliciesProcLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentIssuerAffiliationDomain_019fed4d-3d42-7f01-891f-3e878e03d038_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIssuerAffiliationDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Issuer Affiliation [Domain]</link:label>
    <link:label id="lab_us-gaap_InvestmentIssuerAffiliationDomain_label_en-US" xlink:label="lab_us-gaap_InvestmentIssuerAffiliationDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Issuer Affiliation [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIssuerAffiliationDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIssuerAffiliationDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="lab_us-gaap_InvestmentIssuerAffiliationDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearOne_019fed4d-3dd3-7b7b-8f27-547a772b015e_terseLabel_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letters of credit outstanding, amount, year one</link:label>
    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearOne_label_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letters Of Credit Outstanding, Amount, Year One</link:label>
    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearOne_documentation_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Letters Of Credit Outstanding, Amount, Year One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:href="arcc-20260930.xsd#arcc_LettersOfCreditOutstandingAmountYearOne"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:to="lab_arcc_LettersOfCreditOutstandingAmountYearOne" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ReddyIceLLCMember_019fed4d-3dd3-7d83-b204-0f79994f8f7f_terseLabel_en-US" xlink:label="lab_arcc_ReddyIceLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reddy Ice LLC</link:label>
    <link:label id="lab_arcc_ReddyIceLLCMember_label_en-US" xlink:label="lab_arcc_ReddyIceLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reddy Ice LLC [Member]</link:label>
    <link:label id="lab_arcc_ReddyIceLLCMember_documentation_en-US" xlink:label="lab_arcc_ReddyIceLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reddy Ice LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ReddyIceLLCMember" xlink:href="arcc-20260930.xsd#arcc_ReddyIceLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ReddyIceLLCMember" xlink:to="lab_arcc_ReddyIceLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FTAIInfrastructureInc.AndFIPRRHoldingsLLCMember_019fed4d-3e56-70ae-9cc4-63dc6414eba1_terseLabel_en-US" xlink:label="lab_arcc_FTAIInfrastructureInc.AndFIPRRHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FTAI Infrastructure Inc. and FIP RR Holdings LLC</link:label>
    <link:label id="lab_arcc_FTAIInfrastructureInc.AndFIPRRHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_FTAIInfrastructureInc.AndFIPRRHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">FTAI Infrastructure Inc. and FIP RR Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_FTAIInfrastructureInc.AndFIPRRHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_FTAIInfrastructureInc.AndFIPRRHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">FTAI Infrastructure Inc. and FIP RR Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FTAIInfrastructureInc.AndFIPRRHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_FTAIInfrastructureInc.AndFIPRRHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FTAIInfrastructureInc.AndFIPRRHoldingsLLCMember" xlink:to="lab_arcc_FTAIInfrastructureInc.AndFIPRRHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember_019fed4d-3dd3-7dc7-9c73-30d847db155e_terseLabel_en-US" xlink:label="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Royal Borrower, LLC and Royal Parent, LP</link:label>
    <link:label id="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember_label_en-US" xlink:label="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Royal Borrower, LLC and Royal Parent, LP [Member]</link:label>
    <link:label id="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember_documentation_en-US" xlink:label="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Royal Borrower, LLC and Royal Parent, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:href="arcc-20260930.xsd#arcc_RoyalBorrowerLLCAndRoyalParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:to="lab_arcc_RoyalBorrowerLLCAndRoyalParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvitedInc.AndKSLLongdriveCoInvestL.P.Member_019fed4d-3e56-7bb3-8cca-1b092aaa8030_terseLabel_en-US" xlink:label="lab_arcc_InvitedInc.AndKSLLongdriveCoInvestL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Invited, Inc. and KSL Longdrive Co-Invest, L.P.</link:label>
    <link:label id="lab_arcc_InvitedInc.AndKSLLongdriveCoInvestL.P.Member_label_en-US" xlink:label="lab_arcc_InvitedInc.AndKSLLongdriveCoInvestL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Invited, Inc. and KSL Longdrive Co-Invest, L.P. [Member]</link:label>
    <link:label id="lab_arcc_InvitedInc.AndKSLLongdriveCoInvestL.P.Member_documentation_en-US" xlink:label="lab_arcc_InvitedInc.AndKSLLongdriveCoInvestL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Invited, Inc. and KSL Longdrive Co-Invest, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvitedInc.AndKSLLongdriveCoInvestL.P.Member" xlink:href="arcc-20260930.xsd#arcc_InvitedInc.AndKSLLongdriveCoInvestL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvitedInc.AndKSLLongdriveCoInvestL.P.Member" xlink:to="lab_arcc_InvitedInc.AndKSLLongdriveCoInvestL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_019fed4d-3d42-74c4-94e5-31c20aa0353d_terseLabel_en-US" xlink:label="lab_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized and unrealized gains (losses) on investments, foreign currency and other transactions</link:label>
    <link:label id="lab_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_019fed4d-3d42-7a1b-9a93-1069ef9c8010_totalLabel_en-US" xlink:label="lab_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total net realized and unrealized gains (losses) on investments, foreign currency and other transactions</link:label>
    <link:label id="lab_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_label_en-US" xlink:label="lab_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, after Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:to="lab_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AppleBidcoHoldingsInc.Member_019fed4d-3d42-7d7a-a98d-708c1eac8a06_terseLabel_en-US" xlink:label="lab_arcc_AppleBidcoHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Apple Bidco Holdings, Inc.</link:label>
    <link:label id="lab_arcc_AppleBidcoHoldingsInc.Member_label_en-US" xlink:label="lab_arcc_AppleBidcoHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Apple Bidco Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_AppleBidcoHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_AppleBidcoHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Apple Bidco Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AppleBidcoHoldingsInc.Member" xlink:href="arcc-20260930.xsd#arcc_AppleBidcoHoldingsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AppleBidcoHoldingsInc.Member" xlink:to="lab_arcc_AppleBidcoHoldingsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NumberOfOperatingSegments_019fed4d-3d41-79bd-a6fd-c656380220a9_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfOperatingSegments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of operating segment</link:label>
    <link:label id="lab_us-gaap_NumberOfOperatingSegments_label_en-US" xlink:label="lab_us-gaap_NumberOfOperatingSegments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Operating Segments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NumberOfOperatingSegments" xlink:to="lab_us-gaap_NumberOfOperatingSegments" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCentralIndexKey_019fed4d-3e56-76ef-881b-c86a76db45ba_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_019fed4d-3e56-73cc-a76b-33799884650e_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital in excess of par value</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid in Capital, Common Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:to="lab_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EquityAbstract_019fed4d-3d42-7e1a-a227-4c6d225e0983_terseLabel_en-US" xlink:label="lab_us-gaap_EquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity</link:label>
    <link:label id="lab_us-gaap_EquityAbstract_label_en-US" xlink:label="lab_us-gaap_EquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityAbstract" xlink:to="lab_us-gaap_EquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember_terseLabel_en-US" xlink:label="lab_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year</link:label>
    <link:label id="lab_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember_label_en-US" xlink:label="lab_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember" xlink:to="lab_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_019fed4d-3e56-7022-97c7-1df7bcc94602_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_label_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfInvestmentsLineItems_019fed4d-3dd3-79e4-8ebf-00220ec38a8e_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Investments [Line Items]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfInvestmentsLineItems_label_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Investments [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="lab_us-gaap_ScheduleOfInvestmentsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevenueRecognitionDividends_019fed4d-3dd3-7c33-a728-9770404d047a_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueRecognitionDividends" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividend Income Recognition</link:label>
    <link:label id="lab_us-gaap_RevenueRecognitionDividends_label_en-US" xlink:label="lab_us-gaap_RevenueRecognitionDividends" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue Recognition, Dividends [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRecognitionDividends" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRecognitionDividends"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueRecognitionDividends" xlink:to="lab_us-gaap_RevenueRecognitionDividends" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare_019fed4d-3e56-7cf4-bdef-385f10dc5c34_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized and unrealized gains (losses) for period (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Gain (Loss) on Investment, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:to="lab_us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember_019fed4d-3e56-7493-8829-7523b59a190f_terseLabel_en-US" xlink:label="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shur-Co Acquisition, Inc. and Shur-Co HoldCo, Inc.</link:label>
    <link:label id="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember_label_en-US" xlink:label="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shur-Co Acquisition, Inc. and Shur-Co HoldCo, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember_documentation_en-US" xlink:label="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shur-Co Acquisition, Inc. and Shur-Co HoldCo, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:href="arcc-20260930.xsd#arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:to="lab_arcc_ShurCoAcquisitionIncAndShurCoHoldCoIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyIssuanceOfSharesPerShare_019fed4d-3dd3-76f5-9825-97e873ce35eb_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyIssuanceOfSharesPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuances of common stock (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyIssuanceOfSharesPerShare_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyIssuanceOfSharesPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Share Issuance, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyIssuanceOfSharesPerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyIssuanceOfSharesPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyIssuanceOfSharesPerShare" xlink:to="lab_us-gaap_InvestmentCompanyIssuanceOfSharesPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DesignatedAsHedgingInstrumentMember_019fed4d-3e56-793b-86c3-25d612955346_terseLabel_en-US" xlink:label="lab_us-gaap_DesignatedAsHedgingInstrumentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hedged Item</link:label>
    <link:label id="lab_us-gaap_DesignatedAsHedgingInstrumentMember_label_en-US" xlink:label="lab_us-gaap_DesignatedAsHedgingInstrumentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Designated as Hedging Instrument [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DesignatedAsHedgingInstrumentMember" xlink:to="lab_us-gaap_DesignatedAsHedgingInstrumentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember_019fed4d-3e56-795b-88db-e871c81cdaa8_terseLabel_en-US" xlink:label="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DTI Holdco, Inc. and OPE DTI Holdings, Inc.</link:label>
    <link:label id="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember_label_en-US" xlink:label="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">DTI Holdco, Inc. and OPE DTI Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">DTI Holdco, Inc. and OPE DTI Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:to="lab_arcc_DTIHoldcoIncAndOPEDTIHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GMFParentInc.AndGMFGroupHoldingsLPMember_019fed4d-3d42-7890-9147-4a413f89ed3d_terseLabel_en-US" xlink:label="lab_arcc_GMFParentInc.AndGMFGroupHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GMF Parent, Inc. and GMF Group Holdings, LP</link:label>
    <link:label id="lab_arcc_GMFParentInc.AndGMFGroupHoldingsLPMember_label_en-US" xlink:label="lab_arcc_GMFParentInc.AndGMFGroupHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GMF Parent, Inc. and GMF Group Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_GMFParentInc.AndGMFGroupHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_GMFParentInc.AndGMFGroupHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GMF Parent, Inc. and GMF Group Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GMFParentInc.AndGMFGroupHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_GMFParentInc.AndGMFGroupHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GMFParentInc.AndGMFGroupHoldingsLPMember" xlink:to="lab_arcc_GMFParentInc.AndGMFGroupHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember_019fed4d-3e56-793c-b4a0-e875b47fd041_terseLabel_en-US" xlink:label="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NMN Holdings III Corp. and NMN Holdings LP</link:label>
    <link:label id="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember_label_en-US" xlink:label="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NMN Holdings III Corp. and NMN Holdings LP [Member]</link:label>
    <link:label id="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NMN Holdings III Corp. and NMN Holdings LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember" xlink:to="lab_arcc_NMNHoldingsIIICorpAndNMNHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_019fed4d-3dd3-7350-9d09-da08945cdead_terseLabel_en-US" xlink:label="lab_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gains (losses):</link:label>
    <link:label id="lab_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_label_en-US" xlink:label="lab_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt and Equity Securities, Unrealized Gain (Loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:to="lab_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019fed4d-3e56-7dda-8e4e-2dabf79ed75c_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate spread</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Basis Spread on Variable Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:to="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfDividendsPayableTextBlock_019fed4d-3d42-7465-bc85-5df6f4594cbe_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDividendsPayableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Dividend Reinvestment Plan Activity</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDividendsPayableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDividendsPayableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Dividends Payable [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDividendsPayableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDividendsPayableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDividendsPayableTextBlock" xlink:to="lab_us-gaap_ScheduleOfDividendsPayableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_VariableRateDomain_019fed4d-3dd3-7d13-b589-5e40cdea5294_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Rate [Domain]</link:label>
    <link:label id="lab_us-gaap_VariableRateDomain_label_en-US" xlink:label="lab_us-gaap_VariableRateDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableRateDomain" xlink:to="lab_us-gaap_VariableRateDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019fed4d-3dd3-7cf2-b8c4-f5f27be1db08_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period One</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period One [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ModernizingMedicineInc.AndModMedSoftwareMidcoHoldingsInc.Member_019fed4d-3e56-7255-9bb7-81e8a6952678_terseLabel_en-US" xlink:label="lab_arcc_ModernizingMedicineInc.AndModMedSoftwareMidcoHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Modernizing Medicine, Inc. and ModMed Software Midco Holdings, Inc.</link:label>
    <link:label id="lab_arcc_ModernizingMedicineInc.AndModMedSoftwareMidcoHoldingsInc.Member_label_en-US" xlink:label="lab_arcc_ModernizingMedicineInc.AndModMedSoftwareMidcoHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Modernizing Medicine, Inc. and ModMed Software Midco Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ModernizingMedicineInc.AndModMedSoftwareMidcoHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_ModernizingMedicineInc.AndModMedSoftwareMidcoHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Modernizing Medicine, Inc. and ModMed Software Midco Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ModernizingMedicineInc.AndModMedSoftwareMidcoHoldingsInc.Member" xlink:href="arcc-20260930.xsd#arcc_ModernizingMedicineInc.AndModMedSoftwareMidcoHoldingsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ModernizingMedicineInc.AndModMedSoftwareMidcoHoldingsInc.Member" xlink:to="lab_arcc_ModernizingMedicineInc.AndModMedSoftwareMidcoHoldingsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AllIndividualsMember_terseLabel_en-US" xlink:label="lab_ecd_AllIndividualsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Individuals</link:label>
    <link:label id="lab_ecd_AllIndividualsMember_label_en-US" xlink:label="lab_ecd_AllIndividualsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Individuals [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllIndividualsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="lab_ecd_AllIndividualsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentIssuerNameDomain_019fed4d-3e56-7612-b5fd-1f752b7c428b_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIssuerNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Issuer Name [Domain]</link:label>
    <link:label id="lab_us-gaap_InvestmentIssuerNameDomain_label_en-US" xlink:label="lab_us-gaap_InvestmentIssuerNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Issuer Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIssuerNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIssuerNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIssuerNameDomain" xlink:to="lab_us-gaap_InvestmentIssuerNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DaylightBetaParentLLCAndCFCoLLCMember_019fed4d-3e56-74ff-8d17-c26d0df74afd_terseLabel_en-US" xlink:label="lab_arcc_DaylightBetaParentLLCAndCFCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Daylight Beta Parent LLC and CFCo, LLC</link:label>
    <link:label id="lab_arcc_DaylightBetaParentLLCAndCFCoLLCMember_label_en-US" xlink:label="lab_arcc_DaylightBetaParentLLCAndCFCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Daylight Beta Parent LLC and CFCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_DaylightBetaParentLLCAndCFCoLLCMember_documentation_en-US" xlink:label="lab_arcc_DaylightBetaParentLLCAndCFCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Daylight Beta Parent LLC and CFCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DaylightBetaParentLLCAndCFCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_DaylightBetaParentLLCAndCFCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DaylightBetaParentLLCAndCFCoLLCMember" xlink:to="lab_arcc_DaylightBetaParentLLCAndCFCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsOfDividends_019fed4d-3dd3-71c6-a68b-fdeda1b5aa02_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividends" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Dividends paid</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDividends_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDividends" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividends" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfDividends"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividends" xlink:to="lab_us-gaap_PaymentsOfDividends" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019fed4d-3d42-7245-a582-e32f7eb246e6_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_019fed4d-3dd3-7d99-9fa5-077aae40dc88_terseLabel_en-US" xlink:label="lab_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized gains (losses):</link:label>
    <link:label id="lab_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_label_en-US" xlink:label="lab_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt and Equity Securities, Realized Gain (Loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtAndEquitySecuritiesRealizedGainLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss" xlink:to="lab_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NorthHavenFairwayBuyerLLCAndFairwayLawnsLLCMember_019fed4d-3d42-721c-aba6-5efa0835ec67_terseLabel_en-US" xlink:label="lab_arcc_NorthHavenFairwayBuyerLLCAndFairwayLawnsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">North Haven Fairway Buyer, LLC and Fairway Lawns, LLC</link:label>
    <link:label id="lab_arcc_NorthHavenFairwayBuyerLLCAndFairwayLawnsLLCMember_label_en-US" xlink:label="lab_arcc_NorthHavenFairwayBuyerLLCAndFairwayLawnsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">North Haven Fairway Buyer, LLC and Fairway Lawns, LLC [Member]</link:label>
    <link:label id="lab_arcc_NorthHavenFairwayBuyerLLCAndFairwayLawnsLLCMember_documentation_en-US" xlink:label="lab_arcc_NorthHavenFairwayBuyerLLCAndFairwayLawnsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">North Haven Fairway Buyer, LLC and Fairway Lawns, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NorthHavenFairwayBuyerLLCAndFairwayLawnsLLCMember" xlink:href="arcc-20260930.xsd#arcc_NorthHavenFairwayBuyerLLCAndFairwayLawnsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NorthHavenFairwayBuyerLLCAndFairwayLawnsLLCMember" xlink:to="lab_arcc_NorthHavenFairwayBuyerLLCAndFairwayLawnsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BaseRateDuringReinvestmentPeriodMember_019fed4d-3e56-7396-9a3a-95cf86c1825c_terseLabel_en-US" xlink:label="lab_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base Rate, During Reinvestment Period</link:label>
    <link:label id="lab_arcc_BaseRateDuringReinvestmentPeriodMember_label_en-US" xlink:label="lab_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Base Rate, During Reinvestment Period [Member]</link:label>
    <link:label id="lab_arcc_BaseRateDuringReinvestmentPeriodMember_documentation_en-US" xlink:label="lab_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Base Rate, During Reinvestment Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:href="arcc-20260930.xsd#arcc_BaseRateDuringReinvestmentPeriodMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:to="lab_arcc_BaseRateDuringReinvestmentPeriodMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementLineItems_019fed4d-3d42-755a-a4bf-92d47c915e82_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:label id="lab_us-gaap_StatementLineItems_label_en-US" xlink:label="lab_us-gaap_StatementLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementLineItems" xlink:to="lab_us-gaap_StatementLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_Assets_019fed4d-3d41-77fc-99ee-53206a1a4315_totalLabel_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total assets</link:label>
    <link:label id="lab_us-gaap_Assets_label_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets" xlink:to="lab_us-gaap_Assets" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RealEstateManagementAndDevelopment.Member_019fed4d-3dd3-7d51-a307-69f2d44e87ac_terseLabel_en-US" xlink:label="lab_arcc_RealEstateManagementAndDevelopment.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real Estate Management and Development.</link:label>
    <link:label id="lab_arcc_RealEstateManagementAndDevelopment.Member_label_en-US" xlink:label="lab_arcc_RealEstateManagementAndDevelopment.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Management and Development. [Member]</link:label>
    <link:label id="lab_arcc_RealEstateManagementAndDevelopment.Member_documentation_en-US" xlink:label="lab_arcc_RealEstateManagementAndDevelopment.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Real Estate Management and Development.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RealEstateManagementAndDevelopment.Member" xlink:href="arcc-20260930.xsd#arcc_RealEstateManagementAndDevelopment.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RealEstateManagementAndDevelopment.Member" xlink:to="lab_arcc_RealEstateManagementAndDevelopment.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConvertibleDebtMember_019fed4d-3e56-7bd0-9b55-e6ecd5d3589f_terseLabel_en-US" xlink:label="lab_us-gaap_ConvertibleDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Convertible Debt</link:label>
    <link:label id="lab_us-gaap_ConvertibleDebtMember_label_en-US" xlink:label="lab_us-gaap_ConvertibleDebtMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Convertible Debt [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConvertibleDebtMember" xlink:to="lab_us-gaap_ConvertibleDebtMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ReportableLegalEntitiesMember_01a16039-79f0-78c6-a5c8-00e79cd61b03_terseLabel_en-US" xlink:label="lab_srt_ReportableLegalEntitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P.</link:label>
    <link:label id="lab_srt_ReportableLegalEntitiesMember_label_en-US" xlink:label="lab_srt_ReportableLegalEntitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reportable Legal Entities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ReportableLegalEntitiesMember" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ReportableLegalEntitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ReportableLegalEntitiesMember" xlink:to="lab_srt_ReportableLegalEntitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EquitySecuritiesByIndustryAxis_019fed4d-3dd3-7e97-ac93-1d7d18228354_terseLabel_en-US" xlink:label="lab_us-gaap_EquitySecuritiesByIndustryAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Industry Sector [Axis]</link:label>
    <link:label id="lab_us-gaap_EquitySecuritiesByIndustryAxis_label_en-US" xlink:label="lab_us-gaap_EquitySecuritiesByIndustryAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Industry Sector [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesByIndustryAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesByIndustryAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis" xlink:to="lab_us-gaap_EquitySecuritiesByIndustryAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember_019fed4d-3d42-700b-866c-4eec9ed591b4_terseLabel_en-US" xlink:label="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Johnnie-O Inc. and Johnnie-O Holdings Inc.</link:label>
    <link:label id="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember_label_en-US" xlink:label="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Johnnie-O Inc. and Johnnie-O Holdings Inc. [Member]</link:label>
    <link:label id="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Johnnie-O Inc. and Johnnie-O Holdings Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_JohnnieOIncAndJohnnieOHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember" xlink:to="lab_arcc_JohnnieOIncAndJohnnieOHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019fed4d-3dd3-767d-9c97-d7bb1594169b_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member_019fed4d-3d42-79ee-a3ab-b2a4444a9ee0_terseLabel_en-US" xlink:label="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Centralsquare Technologies, LLC and Supermoose Newco, Inc.</link:label>
    <link:label id="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member_label_en-US" xlink:label="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Centralsquare Technologies, LLC and Supermoose Newco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member_documentation_en-US" xlink:label="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Centralsquare Technologies, LLC and Supermoose Newco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:href="arcc-20260930.xsd#arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:to="lab_arcc_CentralsquareTechnologiesLLCAndSupermooseNewcoInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeoMember_terseLabel_en-US" xlink:label="lab_ecd_PeoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO</link:label>
    <link:label id="lab_ecd_PeoMember_label_en-US" xlink:label="lab_ecd_PeoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PeoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoMember" xlink:to="lab_ecd_PeoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConstellationWealthCapitalFundL.P.ConstellationWealthCapitalFundIILPAndCWCFundIIGPCapitalLPMember_019fed4d-3e56-7954-9ce4-2c8d379822de_terseLabel_en-US" xlink:label="lab_arcc_ConstellationWealthCapitalFundL.P.ConstellationWealthCapitalFundIILPAndCWCFundIIGPCapitalLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Constellation Wealth Capital Fund, L.P., Constellation Wealth Capital Fund II LP, And CWC Fund II GP Capital LP</link:label>
    <link:label id="lab_arcc_ConstellationWealthCapitalFundL.P.ConstellationWealthCapitalFundIILPAndCWCFundIIGPCapitalLPMember_label_en-US" xlink:label="lab_arcc_ConstellationWealthCapitalFundL.P.ConstellationWealthCapitalFundIILPAndCWCFundIIGPCapitalLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Constellation Wealth Capital Fund, L.P., Constellation Wealth Capital Fund II LP, And CWC Fund II GP Capital LP [Member]</link:label>
    <link:label id="lab_arcc_ConstellationWealthCapitalFundL.P.ConstellationWealthCapitalFundIILPAndCWCFundIIGPCapitalLPMember_documentation_en-US" xlink:label="lab_arcc_ConstellationWealthCapitalFundL.P.ConstellationWealthCapitalFundIILPAndCWCFundIIGPCapitalLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Constellation Wealth Capital Fund, L.P., Constellation Wealth Capital Fund II LP, And CWC Fund II GP Capital LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConstellationWealthCapitalFundL.P.ConstellationWealthCapitalFundIILPAndCWCFundIIGPCapitalLPMember" xlink:href="arcc-20260930.xsd#arcc_ConstellationWealthCapitalFundL.P.ConstellationWealthCapitalFundIILPAndCWCFundIIGPCapitalLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ConstellationWealthCapitalFundL.P.ConstellationWealthCapitalFundIILPAndCWCFundIIGPCapitalLPMember" xlink:to="lab_arcc_ConstellationWealthCapitalFundL.P.ConstellationWealthCapitalFundIILPAndCWCFundIIGPCapitalLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NomiHealthIncMember_019fed4d-3dd3-7a58-8308-c21c6395b493_terseLabel_en-US" xlink:label="lab_arcc_NomiHealthIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nomi Health, Inc.</link:label>
    <link:label id="lab_arcc_NomiHealthIncMember_label_en-US" xlink:label="lab_arcc_NomiHealthIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nomi Health, Inc. [Member]</link:label>
    <link:label id="lab_arcc_NomiHealthIncMember_documentation_en-US" xlink:label="lab_arcc_NomiHealthIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Nomi Health, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NomiHealthIncMember" xlink:href="arcc-20260930.xsd#arcc_NomiHealthIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NomiHealthIncMember" xlink:to="lab_arcc_NomiHealthIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LetterOfCreditFacilityMember_019fed4d-3dd3-728f-97a7-b80f6e03e4e4_terseLabel_en-US" xlink:label="lab_arcc_LetterOfCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letter of Credit Facility</link:label>
    <link:label id="lab_arcc_LetterOfCreditFacilityMember_label_en-US" xlink:label="lab_arcc_LetterOfCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letter Of Credit Facility [Member]</link:label>
    <link:label id="lab_arcc_LetterOfCreditFacilityMember_documentation_en-US" xlink:label="lab_arcc_LetterOfCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Letter Of Credit Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LetterOfCreditFacilityMember" xlink:href="arcc-20260930.xsd#arcc_LetterOfCreditFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LetterOfCreditFacilityMember" xlink:to="lab_arcc_LetterOfCreditFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeAssetCounterpartyNameExtensibleList_019fed4d-3dd3-7c30-a040-839bb70f3b0f_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Asset, Counterparty Name [Extensible Enumeration]</link:label>
    <link:label id="lab_us-gaap_DerivativeAssetCounterpartyNameExtensibleList_label_en-US" xlink:label="lab_us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Counterparty Name [Extensible Enumeration]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetCounterpartyNameExtensibleList"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:to="lab_us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DividendIncomeOperatingExcludingPaidInKind_019fed4d-3d42-7efd-9e16-d4a68a785f82_terseLabel_en-US" xlink:label="lab_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividend income (excluding PIK dividend income)</link:label>
    <link:label id="lab_arcc_DividendIncomeOperatingExcludingPaidInKind_label_en-US" xlink:label="lab_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividend Income, Operating, Excluding Paid-In-Kind</link:label>
    <link:label id="lab_arcc_DividendIncomeOperatingExcludingPaidInKind_documentation_en-US" xlink:label="lab_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Income, Operating, Excluding Paid-In-Kind</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:href="arcc-20260930.xsd#arcc_DividendIncomeOperatingExcludingPaidInKind"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:to="lab_arcc_DividendIncomeOperatingExcludingPaidInKind" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NPDGullLimitedAndGalileoCoInvestmentTrustIMember_01a15e07-c6c4-72a3-9378-faeb85d31e82_terseLabel_en-US" xlink:label="lab_arcc_NPDGullLimitedAndGalileoCoInvestmentTrustIMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NPDGull Limited and Galileo Co-investment Trust I</link:label>
    <link:label id="lab_arcc_NPDGullLimitedAndGalileoCoInvestmentTrustIMember_label_en-US" xlink:label="lab_arcc_NPDGullLimitedAndGalileoCoInvestmentTrustIMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NPDGull Limited and Galileo Co-investment Trust I [Member]</link:label>
    <link:label id="lab_arcc_NPDGullLimitedAndGalileoCoInvestmentTrustIMember_documentation_en-US" xlink:label="lab_arcc_NPDGullLimitedAndGalileoCoInvestmentTrustIMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NPDGull Limited and Galileo Co-investment Trust I</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NPDGullLimitedAndGalileoCoInvestmentTrustIMember" xlink:href="arcc-20260930.xsd#arcc_NPDGullLimitedAndGalileoCoInvestmentTrustIMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NPDGullLimitedAndGalileoCoInvestmentTrustIMember" xlink:to="lab_arcc_NPDGullLimitedAndGalileoCoInvestmentTrustIMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract_019fed4d-3dd3-7207-8ddc-6e42942d5fa8_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">REALIZED AND UNREALIZED GAINS (LOSSES) ON INVESTMENTS, FOREIGN CURRENCY AND OTHER TRANSACTIONS:</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss), Investment and Derivative, Operating, and Foreign Currency Transaction, before Tax [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrencyAbstract"/>
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    <link:label id="lab_ecd_ForgoneRecoveryDueToViolationOfHomeCountryLawAmt_terseLabel_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToViolationOfHomeCountryLawAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Violation of Home Country Law, Amount</link:label>
    <link:label id="lab_ecd_ForgoneRecoveryDueToViolationOfHomeCountryLawAmt_label_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToViolationOfHomeCountryLawAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Violation of Home Country Law, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryDueToViolationOfHomeCountryLawAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ForgoneRecoveryDueToViolationOfHomeCountryLawAmt"/>
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    <link:label id="lab_us-gaap_RetainedEarningsMember_019fed4d-3d42-7330-97c7-6d6a78dc2112_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Undistributed (Overdistributed) Earnings</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsMember_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsMember" xlink:to="lab_us-gaap_RetainedEarningsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_019fed4d-3e56-741a-b919-847ae1ed55f1_terseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility</link:label>
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_019fed4d-3e56-7ccd-a3c2-2bcc081ca093_verboseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Revolving tranche</link:label>
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_label_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevolvingCreditFacilityMember" xlink:to="lab_us-gaap_RevolvingCreditFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare_019fed4d-3e56-797c-be19-82276c506bed_totalLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net increase in stockholders' equity resulting from operations (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Investment Income (Loss) from Operations, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:to="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fed4d-3e56-7183-a7c7-c424f57fd434_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Stockholders' Equity [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Stockholders' Equity [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_019fed4d-3e56-77f8-a10b-8259d65d19d7_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares outstanding at end of period (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_019fed4d-3e56-7d01-a209-78a8bddd366f_verboseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Common stock, shares outstanding (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares, Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesOutstanding" xlink:to="lab_us-gaap_CommonStockSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgDiscLineItems_label_en-US" xlink:label="lab_ecd_AwardTmgDiscLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing Disclosures [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgDiscLineItems" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgDiscLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="lab_ecd_AwardTmgDiscLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_019fed4d-3dd3-748a-ae0c-4e9c69d90831_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Diluted net income per common share (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_019fed4d-3dd3-721c-b475-1ed6ba636c7e_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net increase in stockholders&#8217; equity resulting from operations per share&#8212;diluted (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Diluted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareDiluted" xlink:to="lab_us-gaap_EarningsPerShareDiluted" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FoundationRiskPartnersCorpMember_019fed4d-3e55-7ddd-b0b4-948d643e8e49_terseLabel_en-US" xlink:label="lab_arcc_FoundationRiskPartnersCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foundation Risk Partners, Corp.</link:label>
    <link:label id="lab_arcc_FoundationRiskPartnersCorpMember_label_en-US" xlink:label="lab_arcc_FoundationRiskPartnersCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foundation Risk Partners, Corp. [Member]</link:label>
    <link:label id="lab_arcc_FoundationRiskPartnersCorpMember_documentation_en-US" xlink:label="lab_arcc_FoundationRiskPartnersCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foundation Risk Partners, Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FoundationRiskPartnersCorpMember" xlink:href="arcc-20260930.xsd#arcc_FoundationRiskPartnersCorpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FoundationRiskPartnersCorpMember" xlink:to="lab_arcc_FoundationRiskPartnersCorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCAndVistriaBlockedMGTInvestorLPMember_01a159b0-373e-75c0-b6a0-197501ba8cc0_terseLabel_en-US" xlink:label="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCAndVistriaBlockedMGTInvestorLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TVG-MGT Upper Intermediate Holdings, LLC and Vistria Blocked MGT Investor, LP</link:label>
    <link:label id="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCAndVistriaBlockedMGTInvestorLPMember_label_en-US" xlink:label="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCAndVistriaBlockedMGTInvestorLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TVG-MGT Upper Intermediate Holdings, LLC and Vistria Blocked MGT Investor, LP [Member]</link:label>
    <link:label id="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCAndVistriaBlockedMGTInvestorLPMember_documentation_en-US" xlink:label="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCAndVistriaBlockedMGTInvestorLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TVG-MGT Upper Intermediate Holdings, LLC and Vistria Blocked MGT Investor, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TVGMGTUpperIntermediateHoldingsLLCAndVistriaBlockedMGTInvestorLPMember" xlink:href="arcc-20260930.xsd#arcc_TVGMGTUpperIntermediateHoldingsLLCAndVistriaBlockedMGTInvestorLPMember"/>
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    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearThree_01a15525-3979-7708-b94a-06ad0a1196d1_terseLabel_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearThree" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letters of credit outstanding, amount, year three</link:label>
    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearThree_label_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearThree" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letters Of Credit Outstanding, Amount, Year Three</link:label>
    <link:label id="lab_arcc_LettersOfCreditOutstandingAmountYearThree_documentation_en-US" xlink:label="lab_arcc_LettersOfCreditOutstandingAmountYearThree" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Letters Of Credit Outstanding, Amount, Year Three</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LettersOfCreditOutstandingAmountYearThree" xlink:href="arcc-20260930.xsd#arcc_LettersOfCreditOutstandingAmountYearThree"/>
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    <link:label id="lab_arcc_KNPCHoldCoLLCMember_019fed4d-3d42-7206-8577-4c546d6394d7_terseLabel_en-US" xlink:label="lab_arcc_KNPCHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">KNPC HoldCo, LLC</link:label>
    <link:label id="lab_arcc_KNPCHoldCoLLCMember_label_en-US" xlink:label="lab_arcc_KNPCHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">KNPC HoldCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_KNPCHoldCoLLCMember_documentation_en-US" xlink:label="lab_arcc_KNPCHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">KNPC HoldCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KNPCHoldCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_KNPCHoldCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KNPCHoldCoLLCMember" xlink:to="lab_arcc_KNPCHoldCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MidcoHoldingLLCAndNivelTopcoLLCMember_019fed4d-3dd3-7d1c-bf3a-8fe23fba416c_terseLabel_en-US" xlink:label="lab_arcc_MidcoHoldingLLCAndNivelTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Midco Holding, LLC and Nivel Topco, LLC</link:label>
    <link:label id="lab_arcc_MidcoHoldingLLCAndNivelTopcoLLCMember_label_en-US" xlink:label="lab_arcc_MidcoHoldingLLCAndNivelTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Midco Holding, LLC and Nivel Topco, LLC [Member]</link:label>
    <link:label id="lab_arcc_MidcoHoldingLLCAndNivelTopcoLLCMember_documentation_en-US" xlink:label="lab_arcc_MidcoHoldingLLCAndNivelTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Midco Holding, LLC and Nivel Topco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MidcoHoldingLLCAndNivelTopcoLLCMember" xlink:href="arcc-20260930.xsd#arcc_MidcoHoldingLLCAndNivelTopcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MidcoHoldingLLCAndNivelTopcoLLCMember" xlink:to="lab_arcc_MidcoHoldingLLCAndNivelTopcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestIncomeOperatingPaidInCash_019fed4d-3dd3-7321-9e17-82c9b3346bbb_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeOperatingPaidInCash" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest income (excluding payment-in-kind (&#8220;PIK&#8221;) interest income)</link:label>
    <link:label id="lab_us-gaap_InterestIncomeOperatingPaidInCash_label_en-US" xlink:label="lab_us-gaap_InterestIncomeOperatingPaidInCash" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income, Operating, Paid in Cash</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOperatingPaidInCash" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeOperatingPaidInCash"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeOperatingPaidInCash" xlink:to="lab_us-gaap_InterestIncomeOperatingPaidInCash" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VamosBidcoInc.Member_019fed4d-3e56-7b29-a7eb-09b4e8a88dbe_terseLabel_en-US" xlink:label="lab_arcc_VamosBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vamos Bidco, Inc.</link:label>
    <link:label id="lab_arcc_VamosBidcoInc.Member_label_en-US" xlink:label="lab_arcc_VamosBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vamos Bidco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_VamosBidcoInc.Member_documentation_en-US" xlink:label="lab_arcc_VamosBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Vamos Bidco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VamosBidcoInc.Member" xlink:href="arcc-20260930.xsd#arcc_VamosBidcoInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VamosBidcoInc.Member" xlink:to="lab_arcc_VamosBidcoInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IRIGroupHoldingsInc.AndCircanaLLCMember_019fed4d-3dd3-7ed2-9ccf-84f75762d654_terseLabel_en-US" xlink:label="lab_arcc_IRIGroupHoldingsInc.AndCircanaLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">IRI Group Holdings, Inc. and Circana, LLC</link:label>
    <link:label id="lab_arcc_IRIGroupHoldingsInc.AndCircanaLLCMember_label_en-US" xlink:label="lab_arcc_IRIGroupHoldingsInc.AndCircanaLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IRI Group Holdings, Inc. and Circana, LLC [Member]</link:label>
    <link:label id="lab_arcc_IRIGroupHoldingsInc.AndCircanaLLCMember_documentation_en-US" xlink:label="lab_arcc_IRIGroupHoldingsInc.AndCircanaLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">IRI Group Holdings, Inc. and Circana, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IRIGroupHoldingsInc.AndCircanaLLCMember" xlink:href="arcc-20260930.xsd#arcc_IRIGroupHoldingsInc.AndCircanaLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IRIGroupHoldingsInc.AndCircanaLLCMember" xlink:to="lab_arcc_IRIGroupHoldingsInc.AndCircanaLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_UnitedDigestiveMSOParentLLCAndKolnCoInvestUnblockedLPMember_019fed4d-3dd3-72f2-9893-e0a614568e6e_terseLabel_en-US" xlink:label="lab_arcc_UnitedDigestiveMSOParentLLCAndKolnCoInvestUnblockedLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">United Digestive MSO Parent, LLC and Koln Co-Invest Unblocked, LP</link:label>
    <link:label id="lab_arcc_UnitedDigestiveMSOParentLLCAndKolnCoInvestUnblockedLPMember_label_en-US" xlink:label="lab_arcc_UnitedDigestiveMSOParentLLCAndKolnCoInvestUnblockedLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">United Digestive MSO Parent, LLC and Koln Co-Invest Unblocked, LP [Member]</link:label>
    <link:label id="lab_arcc_UnitedDigestiveMSOParentLLCAndKolnCoInvestUnblockedLPMember_documentation_en-US" xlink:label="lab_arcc_UnitedDigestiveMSOParentLLCAndKolnCoInvestUnblockedLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">United Digestive MSO Parent, LLC and Koln Co-Invest Unblocked, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_UnitedDigestiveMSOParentLLCAndKolnCoInvestUnblockedLPMember" xlink:href="arcc-20260930.xsd#arcc_UnitedDigestiveMSOParentLLCAndKolnCoInvestUnblockedLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_UnitedDigestiveMSOParentLLCAndKolnCoInvestUnblockedLPMember" xlink:to="lab_arcc_UnitedDigestiveMSOParentLLCAndKolnCoInvestUnblockedLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GeneratorUSBuyerInc.AndTotalPowerLimitedMember_019fed4d-3d41-78e3-9c71-b833e45f3a39_terseLabel_en-US" xlink:label="lab_arcc_GeneratorUSBuyerInc.AndTotalPowerLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Generator US Buyer, Inc. and Total Power Limited</link:label>
    <link:label id="lab_arcc_GeneratorUSBuyerInc.AndTotalPowerLimitedMember_label_en-US" xlink:label="lab_arcc_GeneratorUSBuyerInc.AndTotalPowerLimitedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Generator US Buyer, Inc. and Total Power Limited [Member]</link:label>
    <link:label id="lab_arcc_GeneratorUSBuyerInc.AndTotalPowerLimitedMember_documentation_en-US" xlink:label="lab_arcc_GeneratorUSBuyerInc.AndTotalPowerLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Generator US Buyer, Inc. and Total Power Limited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GeneratorUSBuyerInc.AndTotalPowerLimitedMember" xlink:href="arcc-20260930.xsd#arcc_GeneratorUSBuyerInc.AndTotalPowerLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GeneratorUSBuyerInc.AndTotalPowerLimitedMember" xlink:to="lab_arcc_GeneratorUSBuyerInc.AndTotalPowerLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_January2026NotesMember_019fed4d-3dd3-7910-8c18-e3bc63a99fbb_verboseLabel_en-US" xlink:label="lab_arcc_January2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">January 2026 Notes</link:label>
    <link:label id="lab_arcc_January2026NotesMember_019fed4d-3dd3-7942-bc15-fea394a5ca4d_terseLabel_en-US" xlink:label="lab_arcc_January2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">January 2026 Notes (principal amount outstanding of $0 and $1,150, respectively)</link:label>
    <link:label id="lab_arcc_January2026NotesMember_label_en-US" xlink:label="lab_arcc_January2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">January 2026 Notes [Member]</link:label>
    <link:label id="lab_arcc_January2026NotesMember_documentation_en-US" xlink:label="lab_arcc_January2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">January 2026 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_January2026NotesMember" xlink:href="arcc-20260930.xsd#arcc_January2026NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_January2026NotesMember" xlink:to="lab_arcc_January2026NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019fed4d-3dd3-7587-83a1-4dd410814c47_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining amount available for borrowing under line of credit</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Remaining Borrowing Capacity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:to="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RawlingsSportingGoodsCompanyInc.AndSEPDiamondFundL.P.Member_019fed4d-3d42-78c4-80b9-03c650f83592_terseLabel_en-US" xlink:label="lab_arcc_RawlingsSportingGoodsCompanyInc.AndSEPDiamondFundL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rawlings Sporting Goods Company, Inc. and SEP Diamond Fund, L.P.</link:label>
    <link:label id="lab_arcc_RawlingsSportingGoodsCompanyInc.AndSEPDiamondFundL.P.Member_label_en-US" xlink:label="lab_arcc_RawlingsSportingGoodsCompanyInc.AndSEPDiamondFundL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rawlings Sporting Goods Company, Inc. and SEP Diamond Fund, L.P. [Member]</link:label>
    <link:label id="lab_arcc_RawlingsSportingGoodsCompanyInc.AndSEPDiamondFundL.P.Member_documentation_en-US" xlink:label="lab_arcc_RawlingsSportingGoodsCompanyInc.AndSEPDiamondFundL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rawlings Sporting Goods Company, Inc. and SEP Diamond Fund, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RawlingsSportingGoodsCompanyInc.AndSEPDiamondFundL.P.Member" xlink:href="arcc-20260930.xsd#arcc_RawlingsSportingGoodsCompanyInc.AndSEPDiamondFundL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RawlingsSportingGoodsCompanyInc.AndSEPDiamondFundL.P.Member" xlink:to="lab_arcc_RawlingsSportingGoodsCompanyInc.AndSEPDiamondFundL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GritBuyerInc.AndIntegrumGritCoInvestLPMember_019fed4d-3dd3-7097-b9e7-addb3541ecdc_terseLabel_en-US" xlink:label="lab_arcc_GritBuyerInc.AndIntegrumGritCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Grit Buyer, Inc. and Integrum Grit Co-Invest LP</link:label>
    <link:label id="lab_arcc_GritBuyerInc.AndIntegrumGritCoInvestLPMember_label_en-US" xlink:label="lab_arcc_GritBuyerInc.AndIntegrumGritCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Grit Buyer, Inc. and Integrum Grit Co-Invest LP [Member]</link:label>
    <link:label id="lab_arcc_GritBuyerInc.AndIntegrumGritCoInvestLPMember_documentation_en-US" xlink:label="lab_arcc_GritBuyerInc.AndIntegrumGritCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Grit Buyer, Inc. and Integrum Grit Co-Invest LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GritBuyerInc.AndIntegrumGritCoInvestLPMember" xlink:href="arcc-20260930.xsd#arcc_GritBuyerInc.AndIntegrumGritCoInvestLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GritBuyerInc.AndIntegrumGritCoInvestLPMember" xlink:to="lab_arcc_GritBuyerInc.AndIntegrumGritCoInvestLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyTotalReturnMarketValue_019fed4d-3dd3-75af-89b1-a1844c8b2f57_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyTotalReturnMarketValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total return based on market value</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyTotalReturnMarketValue_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyTotalReturnMarketValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Total Return, Market Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyTotalReturnMarketValue" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyTotalReturnMarketValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyTotalReturnMarketValue" xlink:to="lab_us-gaap_InvestmentCompanyTotalReturnMarketValue" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_October2036CLOSubordinatedNotesMember_019fed4d-3dd3-7e5f-b2e9-a03e7253ddd6_terseLabel_en-US" xlink:label="lab_arcc_October2036CLOSubordinatedNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">October 2036 CLO Subordinated Notes</link:label>
    <link:label id="lab_arcc_October2036CLOSubordinatedNotesMember_label_en-US" xlink:label="lab_arcc_October2036CLOSubordinatedNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">October 2036 CLO Subordinated Notes [Member]</link:label>
    <link:label id="lab_arcc_October2036CLOSubordinatedNotesMember_documentation_en-US" xlink:label="lab_arcc_October2036CLOSubordinatedNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">October 2036 CLO Subordinated Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_October2036CLOSubordinatedNotesMember" xlink:href="arcc-20260930.xsd#arcc_October2036CLOSubordinatedNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_October2036CLOSubordinatedNotesMember" xlink:to="lab_arcc_October2036CLOSubordinatedNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EqtyAwrdsAdjFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments, Footnote</link:label>
    <link:label id="lab_ecd_EqtyAwrdsAdjFnTextBlock_label_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsAdjFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_EqtyAwrdsAdjFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EqtyAwrdsAdjFnTextBlock" xlink:to="lab_ecd_EqtyAwrdsAdjFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BVIMedicalInc.AndBVIGroupLimitedMember_019fed4d-3e56-7e7d-93f4-0f56e23675d5_terseLabel_en-US" xlink:label="lab_arcc_BVIMedicalInc.AndBVIGroupLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BVI Medical, Inc. and BVI Group Limited</link:label>
    <link:label id="lab_arcc_BVIMedicalInc.AndBVIGroupLimitedMember_label_en-US" xlink:label="lab_arcc_BVIMedicalInc.AndBVIGroupLimitedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BVI Medical, Inc. and BVI Group Limited [Member]</link:label>
    <link:label id="lab_arcc_BVIMedicalInc.AndBVIGroupLimitedMember_documentation_en-US" xlink:label="lab_arcc_BVIMedicalInc.AndBVIGroupLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BVI Medical, Inc. and BVI Group Limited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BVIMedicalInc.AndBVIGroupLimitedMember" xlink:href="arcc-20260930.xsd#arcc_BVIMedicalInc.AndBVIGroupLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BVIMedicalInc.AndBVIGroupLimitedMember" xlink:to="lab_arcc_BVIMedicalInc.AndBVIGroupLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_019fed4d-3e56-7a5b-844a-bd675c33c17c_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Sales</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InterestRateSwap5Member_019fed4d-3dd3-7d4c-ba53-c10c82c3d93c_terseLabel_en-US" xlink:label="lab_arcc_InterestRateSwap5Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate swap 5</link:label>
    <link:label id="lab_arcc_InterestRateSwap5Member_label_en-US" xlink:label="lab_arcc_InterestRateSwap5Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 5 [Member]</link:label>
    <link:label id="lab_arcc_InterestRateSwap5Member_documentation_en-US" xlink:label="lab_arcc_InterestRateSwap5Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 5</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestRateSwap5Member" xlink:href="arcc-20260930.xsd#arcc_InterestRateSwap5Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InterestRateSwap5Member" xlink:to="lab_arcc_InterestRateSwap5Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PosiGenIncMember_019fed4d-3e56-7839-90ff-80601dc4a23f_terseLabel_en-US" xlink:label="lab_arcc_PosiGenIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PosiGen, Inc.</link:label>
    <link:label id="lab_arcc_PosiGenIncMember_label_en-US" xlink:label="lab_arcc_PosiGenIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PosiGen, Inc. [Member]</link:label>
    <link:label id="lab_arcc_PosiGenIncMember_documentation_en-US" xlink:label="lab_arcc_PosiGenIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PosiGen, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PosiGenIncMember" xlink:href="arcc-20260930.xsd#arcc_PosiGenIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PosiGenIncMember" xlink:to="lab_arcc_PosiGenIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentIssuerNameAxis_019fed4d-3dd3-7351-ac8d-e414d4bcb6e0_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIssuerNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Issuer Name [Axis]</link:label>
    <link:label id="lab_us-gaap_InvestmentIssuerNameAxis_label_en-US" xlink:label="lab_us-gaap_InvestmentIssuerNameAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Issuer Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIssuerNameAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIssuerNameAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIssuerNameAxis" xlink:to="lab_us-gaap_InvestmentIssuerNameAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyAgreementTerminationNoticePeriod_019fed4d-3dd3-7a8c-ab0f-34fa07163f51_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyAgreementTerminationNoticePeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Termination notice period</link:label>
    <link:label id="lab_arcc_InvestmentCompanyAgreementTerminationNoticePeriod_label_en-US" xlink:label="lab_arcc_InvestmentCompanyAgreementTerminationNoticePeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Agreement, Termination Notice Period</link:label>
    <link:label id="lab_arcc_InvestmentCompanyAgreementTerminationNoticePeriod_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyAgreementTerminationNoticePeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Agreement, Termination Notice Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyAgreementTerminationNoticePeriod" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyAgreementTerminationNoticePeriod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyAgreementTerminationNoticePeriod" xlink:to="lab_arcc_InvestmentCompanyAgreementTerminationNoticePeriod" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LegendsHospitalityHoldingCompanyLLCASMBuyerInc.LegendsASMHoldcoILLCAndStadiumCoinvestBIIIL.P.Member_019fed4d-3d42-7b78-a79d-f95e0d631dd1_terseLabel_en-US" xlink:label="lab_arcc_LegendsHospitalityHoldingCompanyLLCASMBuyerInc.LegendsASMHoldcoILLCAndStadiumCoinvestBIIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legends Hospitality Holding Company, LLC, ASM Buyer, Inc., Legends ASM Holdco I, LLC, and Stadium Coinvest (B)-III, L.P.</link:label>
    <link:label id="lab_arcc_LegendsHospitalityHoldingCompanyLLCASMBuyerInc.LegendsASMHoldcoILLCAndStadiumCoinvestBIIIL.P.Member_label_en-US" xlink:label="lab_arcc_LegendsHospitalityHoldingCompanyLLCASMBuyerInc.LegendsASMHoldcoILLCAndStadiumCoinvestBIIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Legends Hospitality Holding Company, LLC, ASM Buyer, Inc., Legends ASM Holdco I, LLC, and Stadium Coinvest (B)-III, L.P. [Member]</link:label>
    <link:label id="lab_arcc_LegendsHospitalityHoldingCompanyLLCASMBuyerInc.LegendsASMHoldcoILLCAndStadiumCoinvestBIIIL.P.Member_documentation_en-US" xlink:label="lab_arcc_LegendsHospitalityHoldingCompanyLLCASMBuyerInc.LegendsASMHoldcoILLCAndStadiumCoinvestBIIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Legends Hospitality Holding Company, LLC, ASM Buyer, Inc., Legends ASM Holdco I, LLC, and Stadium Coinvest (B)-III, L.P.</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LegendsHospitalityHoldingCompanyLLCASMBuyerInc.LegendsASMHoldcoILLCAndStadiumCoinvestBIIIL.P.Member" xlink:to="lab_arcc_LegendsHospitalityHoldingCompanyLLCASMBuyerInc.LegendsASMHoldcoILLCAndStadiumCoinvestBIIIL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AtTheMarketOfferingsMember_019fed4d-3e56-7f55-a6ce-231e75914228_terseLabel_en-US" xlink:label="lab_arcc_AtTheMarketOfferingsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">&#8220;At the market&#8221; offerings</link:label>
    <link:label id="lab_arcc_AtTheMarketOfferingsMember_label_en-US" xlink:label="lab_arcc_AtTheMarketOfferingsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">At the Market Offerings [Member]</link:label>
    <link:label id="lab_arcc_AtTheMarketOfferingsMember_documentation_en-US" xlink:label="lab_arcc_AtTheMarketOfferingsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">At the Market Offerings Member</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AtTheMarketOfferingsMember" xlink:to="lab_arcc_AtTheMarketOfferingsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember_019fed4d-3dd3-76a0-8b22-9e3dd9597b52_terseLabel_en-US" xlink:label="lab_arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">W.S. Connelly &amp; Co., LLC and WSC Ultimate Holdings, LLC</link:label>
    <link:label id="lab_arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">W.S. Connelly &amp; Co., LLC and WSC Ultimate Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">W.S. Connelly &amp; Co., LLC and WSC Ultimate Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember" xlink:to="lab_arcc_W.S.ConnellyCo.LLCAndWSCUltimateHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember_019fed4d-3d42-7c92-87f0-e1005933db78_terseLabel_en-US" xlink:label="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Laboratories Bidco LLC and Laboratories Topco LLC</link:label>
    <link:label id="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember_label_en-US" xlink:label="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Laboratories Bidco LLC and Laboratories Topco LLC [Member]</link:label>
    <link:label id="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember_documentation_en-US" xlink:label="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Laboratories Bidco LLC and Laboratories Topco LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:href="arcc-20260930.xsd#arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:to="lab_arcc_LaboratoriesBidcoLLCAndLaboratoriesTopcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_U.S.UrologyPartnersLLCGeneralAtlanticUSUBlockerCollectionHoldcoL.P.AndGeneralAtlanticUSU2CoinvestL.P.Member_019fed4d-3e56-72c9-9696-582312c8c116_terseLabel_en-US" xlink:label="lab_arcc_U.S.UrologyPartnersLLCGeneralAtlanticUSUBlockerCollectionHoldcoL.P.AndGeneralAtlanticUSU2CoinvestL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">U.S. Urology Partners, LLC, General Atlantic (USU) Blocker Collection Holdco, L.P., and General Atlantic (USU-2) Coinvest, L.P.</link:label>
    <link:label id="lab_arcc_U.S.UrologyPartnersLLCGeneralAtlanticUSUBlockerCollectionHoldcoL.P.AndGeneralAtlanticUSU2CoinvestL.P.Member_label_en-US" xlink:label="lab_arcc_U.S.UrologyPartnersLLCGeneralAtlanticUSUBlockerCollectionHoldcoL.P.AndGeneralAtlanticUSU2CoinvestL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">U.S. Urology Partners, LLC, General Atlantic (USU) Blocker Collection Holdco, L.P., and General Atlantic (USU-2) Coinvest, L.P. [Member]</link:label>
    <link:label id="lab_arcc_U.S.UrologyPartnersLLCGeneralAtlanticUSUBlockerCollectionHoldcoL.P.AndGeneralAtlanticUSU2CoinvestL.P.Member_documentation_en-US" xlink:label="lab_arcc_U.S.UrologyPartnersLLCGeneralAtlanticUSUBlockerCollectionHoldcoL.P.AndGeneralAtlanticUSU2CoinvestL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">U.S. Urology Partners, LLC, General Atlantic (USU) Blocker Collection Holdco, L.P., and General Atlantic (USU-2) Coinvest, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_U.S.UrologyPartnersLLCGeneralAtlanticUSUBlockerCollectionHoldcoL.P.AndGeneralAtlanticUSU2CoinvestL.P.Member" xlink:href="arcc-20260930.xsd#arcc_U.S.UrologyPartnersLLCGeneralAtlanticUSUBlockerCollectionHoldcoL.P.AndGeneralAtlanticUSU2CoinvestL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_U.S.UrologyPartnersLLCGeneralAtlanticUSUBlockerCollectionHoldcoL.P.AndGeneralAtlanticUSU2CoinvestL.P.Member" xlink:to="lab_arcc_U.S.UrologyPartnersLLCGeneralAtlanticUSUBlockerCollectionHoldcoL.P.AndGeneralAtlanticUSU2CoinvestL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceExchangeRatioPerShare_01a17ad2-3371-7118-a8b9-59ec5551c693_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceExchangeRatioPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exchange ratio (in dollars per share)</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceExchangeRatioPerShare_label_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceExchangeRatioPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Exchange Ratio, Per Share</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceExchangeRatioPerShare_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceExchangeRatioPerShare" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Exchange Ratio, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationClosingPriceExchangeRatioPerShare" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationClosingPriceExchangeRatioPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationClosingPriceExchangeRatioPerShare" xlink:to="lab_arcc_BusinessCombinationClosingPriceExchangeRatioPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsidiarySaleOfStockAxis_019fed4d-3d42-7d3b-b926-6f5d59ae32f6_terseLabel_en-US" xlink:label="lab_us-gaap_SubsidiarySaleOfStockAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sale of Stock [Axis]</link:label>
    <link:label id="lab_us-gaap_SubsidiarySaleOfStockAxis_label_en-US" xlink:label="lab_us-gaap_SubsidiarySaleOfStockAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Stock [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis" xlink:to="lab_us-gaap_SubsidiarySaleOfStockAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2025M2DividendsMember_019fed4d-3dd3-7210-ae3e-29e77b5b3f3c_terseLabel_en-US" xlink:label="lab_arcc_O2025M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">February 5, 2025</link:label>
    <link:label id="lab_arcc_O2025M2DividendsMember_label_en-US" xlink:label="lab_arcc_O2025M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2025 M2 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2025M2DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2025M2DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, February Five Two Thousand Twenty Five O 2025 M2 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2025M2DividendsMember" xlink:href="arcc-20260930.xsd#arcc_O2025M2DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2025M2DividendsMember" xlink:to="lab_arcc_O2025M2DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_019fed4d-3dd3-7cc8-b16c-5940c062411d_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OPERATING ACTIVITIES:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCMember_019fed4d-3d42-727b-857e-735154add0cc_terseLabel_en-US" xlink:label="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TVG-MGT Upper Intermediate Holdings, LLC</link:label>
    <link:label id="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TVG-MGT Upper Intermediate Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TVG-MGT Upper Intermediate Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TVGMGTUpperIntermediateHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_TVGMGTUpperIntermediateHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TVGMGTUpperIntermediateHoldingsLLCMember" xlink:to="lab_arcc_TVGMGTUpperIntermediateHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OperatingIncomeLoss_019fed4d-3e55-7a60-9f89-dd0b289ab9cf_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net operating income</link:label>
    <link:label id="lab_us-gaap_OperatingIncomeLoss_label_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Income (Loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingIncomeLoss" xlink:to="lab_us-gaap_OperatingIncomeLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember_019fed4d-3d42-7ce4-af3c-3901b9ec8132_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Four</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Four [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodFourMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPeriodFourMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodFourMember" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodFourMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsDeclaredTableTextBlock_019fed4d-3e56-75d1-8a8d-90a096f62678_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsDeclaredTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Dividends Declared and Payable</link:label>
    <link:label id="lab_us-gaap_DividendsDeclaredTableTextBlock_label_en-US" xlink:label="lab_us-gaap_DividendsDeclaredTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Declared [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDeclaredTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsDeclaredTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsDeclaredTableTextBlock" xlink:to="lab_us-gaap_DividendsDeclaredTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DelayedDrawTermLoanMember_019fed4d-3e56-7f8d-80ef-f8b919c98fda_terseLabel_en-US" xlink:label="lab_us-gaap_DelayedDrawTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Delayed draw loan commitments</link:label>
    <link:label id="lab_us-gaap_DelayedDrawTermLoanMember_label_en-US" xlink:label="lab_us-gaap_DelayedDrawTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Delayed Draw Term Loan (DDTL) [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DelayedDrawTermLoanMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DelayedDrawTermLoanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DelayedDrawTermLoanMember" xlink:to="lab_us-gaap_DelayedDrawTermLoanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MembersEquity_019fed4d-3dd3-7d18-9f67-6434a023cb1b_totalLabel_en-US" xlink:label="lab_us-gaap_MembersEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total equity</link:label>
    <link:label id="lab_us-gaap_MembersEquity_label_en-US" xlink:label="lab_us-gaap_MembersEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Members' Equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersEquity" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MembersEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MembersEquity" xlink:to="lab_us-gaap_MembersEquity" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_DebtInstrumentCovenantAssetsToDebtRatioMinimum_019fed4d-3e56-751b-a5ea-4787dcd7d5be_terseLabel_en-US" xlink:label="lab_arcc_DebtInstrumentCovenantAssetsToDebtRatioMinimum" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum required ratio of total assets to total indebtedness</link:label>
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    <link:label id="lab_arcc_DebtInstrumentCovenantAssetsToDebtRatioMinimum_documentation_en-US" xlink:label="lab_arcc_DebtInstrumentCovenantAssetsToDebtRatioMinimum" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Covenant, Assets To Debt Ratio, Minimum</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInSecuritiesLoanedTransactions_019fed4d-3dd3-7928-956e-675c315e38b0_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInSecuritiesLoanedTransactions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Secured borrowings, net</link:label>
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    <link:label id="lab_arcc_June2028NotesMember_019fed4d-3d42-73e7-b86e-4c1adb3151be_verboseLabel_en-US" xlink:label="lab_arcc_June2028NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">June 2028 Notes (principal amount outstanding of $1,250)</link:label>
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    <link:label id="lab_arcc_June2028NotesMember_documentation_en-US" xlink:label="lab_arcc_June2028NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">June 2028 Notes</link:label>
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    <link:label id="lab_arcc_DuraservLLCMember_019fed4d-3dd3-7a8d-af14-1f4eb4653db1_terseLabel_en-US" xlink:label="lab_arcc_DuraservLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Duraserv LLC</link:label>
    <link:label id="lab_arcc_DuraservLLCMember_label_en-US" xlink:label="lab_arcc_DuraservLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Duraserv LLC [Member]</link:label>
    <link:label id="lab_arcc_DuraservLLCMember_documentation_en-US" xlink:label="lab_arcc_DuraservLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Duraserv LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DuraservLLCMember" xlink:href="arcc-20260930.xsd#arcc_DuraservLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DuraservLLCMember" xlink:to="lab_arcc_DuraservLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_QFHoldingsInc.Member_019fed4d-3e56-720d-9b68-8152917c21e0_terseLabel_en-US" xlink:label="lab_arcc_QFHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">QF Holdings, Inc.</link:label>
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    <link:label id="lab_arcc_QFHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_QFHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">QF Holdings, Inc.</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyTransactionDomain_019fed4d-3dd3-7abf-9939-b39e4e7d97bc_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Domain]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionDomain_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain" xlink:to="lab_us-gaap_RelatedPartyTransactionDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SeniorSubordinatedLoansMember_019fed4d-3d41-7a55-8bff-1f5947a632b4_terseLabel_en-US" xlink:label="lab_us-gaap_SeniorSubordinatedLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior subordinated loans</link:label>
    <link:label id="lab_us-gaap_SeniorSubordinatedLoansMember_label_en-US" xlink:label="lab_us-gaap_SeniorSubordinatedLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Subordinated Loans [Member]</link:label>
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    <link:label id="lab_us-gaap_InvestmentOwnedAtFairValue_019fed4d-3e56-76ee-85a1-924370c4683b_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentOwnedAtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value</link:label>
    <link:label id="lab_us-gaap_InvestmentOwnedAtFairValue_019fed4d-3e56-7358-aacb-99f5d3f4cf7a_netLabel_en-US" xlink:label="lab_us-gaap_InvestmentOwnedAtFairValue" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US">Investments at fair value</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedAtFairValue" xlink:to="lab_us-gaap_InvestmentOwnedAtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NotesAndLoansPayable_019fed4d-3dd3-7481-be53-54b9e77ca718_terseLabel_en-US" xlink:label="lab_us-gaap_NotesAndLoansPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt</link:label>
    <link:label id="lab_us-gaap_NotesAndLoansPayable_label_en-US" xlink:label="lab_us-gaap_NotesAndLoansPayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Notes and Loans Payable</link:label>
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    <link:label id="lab_arcc_GalaxyBuyerInc.AndGalaxyTopcoIL.P.Member_019fed4d-3d42-7bff-91f3-320e772dadd1_terseLabel_en-US" xlink:label="lab_arcc_GalaxyBuyerInc.AndGalaxyTopcoIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Galaxy Buyer, Inc. and Galaxy Topco I, L.P.</link:label>
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    <link:label id="lab_us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit_019fed4d-3dd3-79e0-af70-431102481255_terseLabel_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in deferred tax liabilities</link:label>
    <link:label id="lab_us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit_label_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain (Loss), Investment and Derivative, Operating, Tax Expense (Benefit)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit" xlink:to="lab_us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OtherOperatingExpensesMember_019fed4d-3dd3-7e1f-b576-46c1b9e1a303_terseLabel_en-US" xlink:label="lab_arcc_OtherOperatingExpensesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other operating expenses</link:label>
    <link:label id="lab_arcc_OtherOperatingExpensesMember_label_en-US" xlink:label="lab_arcc_OtherOperatingExpensesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Operating Expenses [Member]</link:label>
    <link:label id="lab_arcc_OtherOperatingExpensesMember_documentation_en-US" xlink:label="lab_arcc_OtherOperatingExpensesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Operating Expenses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OtherOperatingExpensesMember" xlink:href="arcc-20260930.xsd#arcc_OtherOperatingExpensesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OtherOperatingExpensesMember" xlink:to="lab_arcc_OtherOperatingExpensesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PvpTableTextBlock_terseLabel_en-US" xlink:label="lab_ecd_PvpTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pay vs Performance Disclosure, Table</link:label>
    <link:label id="lab_ecd_PvpTableTextBlock_label_en-US" xlink:label="lab_ecd_PvpTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pay vs Performance [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PvpTableTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PvpTableTextBlock"/>
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    <link:label id="lab_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_019fed4d-3d42-7f8c-970b-2248249d0bb7_terseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock available for repurchase under the stock repurchase program</link:label>
    <link:label id="lab_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_label_en-US" xlink:label="lab_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Repurchase Program, Remaining Authorized, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:to="lab_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InterestRateSwap8Member_019fed4d-3e56-7f9c-b0f0-e0ffab57e6d6_terseLabel_en-US" xlink:label="lab_arcc_InterestRateSwap8Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 8</link:label>
    <link:label id="lab_arcc_InterestRateSwap8Member_label_en-US" xlink:label="lab_arcc_InterestRateSwap8Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 8 [Member]</link:label>
    <link:label id="lab_arcc_InterestRateSwap8Member_documentation_en-US" xlink:label="lab_arcc_InterestRateSwap8Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 8</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestRateSwap8Member" xlink:href="arcc-20260930.xsd#arcc_InterestRateSwap8Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InterestRateSwap8Member" xlink:to="lab_arcc_InterestRateSwap8Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrDuration_terseLabel_en-US" xlink:label="lab_ecd_TrdArrDuration" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Arrangement Duration</link:label>
    <link:label id="lab_ecd_TrdArrDuration_label_en-US" xlink:label="lab_ecd_TrdArrDuration" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement Duration</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrDuration" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrDuration"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrDuration" xlink:to="lab_ecd_TrdArrDuration" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HimalayaTopCoLLCAndBCPEHyperlinkHoldingsLPMember_019fed4d-3dd3-75e7-8e25-461eaf2fc6b2_terseLabel_en-US" xlink:label="lab_arcc_HimalayaTopCoLLCAndBCPEHyperlinkHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Himalaya TopCo LLC and BCPE Hyperlink Holdings, LP</link:label>
    <link:label id="lab_arcc_HimalayaTopCoLLCAndBCPEHyperlinkHoldingsLPMember_label_en-US" xlink:label="lab_arcc_HimalayaTopCoLLCAndBCPEHyperlinkHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Himalaya TopCo LLC and BCPE Hyperlink Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_HimalayaTopCoLLCAndBCPEHyperlinkHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_HimalayaTopCoLLCAndBCPEHyperlinkHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Himalaya TopCo LLC and BCPE Hyperlink Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HimalayaTopCoLLCAndBCPEHyperlinkHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_HimalayaTopCoLLCAndBCPEHyperlinkHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HimalayaTopCoLLCAndBCPEHyperlinkHoldingsLPMember" xlink:to="lab_arcc_HimalayaTopCoLLCAndBCPEHyperlinkHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TripleJJJLubeCorp.AndTCCBuyerHoldcoLLCMember_019fed4d-3e56-703c-b57d-a35ea2dc8354_terseLabel_en-US" xlink:label="lab_arcc_TripleJJJLubeCorp.AndTCCBuyerHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Triple JJJ Lube, Corp. and TCC Buyer Holdco, LLC</link:label>
    <link:label id="lab_arcc_TripleJJJLubeCorp.AndTCCBuyerHoldcoLLCMember_label_en-US" xlink:label="lab_arcc_TripleJJJLubeCorp.AndTCCBuyerHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Triple JJJ Lube, Corp. and TCC Buyer Holdco, LLC [Member]</link:label>
    <link:label id="lab_arcc_TripleJJJLubeCorp.AndTCCBuyerHoldcoLLCMember_documentation_en-US" xlink:label="lab_arcc_TripleJJJLubeCorp.AndTCCBuyerHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Triple JJJ Lube, Corp. and TCC Buyer Holdco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TripleJJJLubeCorp.AndTCCBuyerHoldcoLLCMember" xlink:href="arcc-20260930.xsd#arcc_TripleJJJLubeCorp.AndTCCBuyerHoldcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TripleJJJLubeCorp.AndTCCBuyerHoldcoLLCMember" xlink:to="lab_arcc_TripleJJJLubeCorp.AndTCCBuyerHoldcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidationItemsAxis_019fed4d-3d42-7f98-b528-8088f5a91468_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:label id="lab_srt_ConsolidationItemsAxis_label_en-US" xlink:label="lab_srt_ConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsAxis" xlink:to="lab_srt_ConsolidationItemsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressPostalZipCode_019fed4d-3dd3-7c5a-9d4f-1cf3519d430e_terseLabel_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:label id="lab_dei_EntityAddressPostalZipCode_label_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressPostalZipCode" xlink:to="lab_dei_EntityAddressPostalZipCode" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityRegistrantName_019fed4d-3dd3-79b5-b9ea-c35c567626be_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_label_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName" xlink:to="lab_dei_EntityRegistrantName" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LifeStylesBidcoLtd.LifestylesUSHoldcoInc.AndLifeStylesParentL.P.Member_019fed4d-3dd3-7f07-960f-ffd646f75ae1_terseLabel_en-US" xlink:label="lab_arcc_LifeStylesBidcoLtd.LifestylesUSHoldcoInc.AndLifeStylesParentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LifeStyles Bidco Ltd., Lifestyles US Holdco, Inc. and LifeStyles Parent, L.P.</link:label>
    <link:label id="lab_arcc_LifeStylesBidcoLtd.LifestylesUSHoldcoInc.AndLifeStylesParentL.P.Member_label_en-US" xlink:label="lab_arcc_LifeStylesBidcoLtd.LifestylesUSHoldcoInc.AndLifeStylesParentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">LifeStyles Bidco Ltd., Lifestyles US Holdco, Inc. and LifeStyles Parent, L.P. [Member]</link:label>
    <link:label id="lab_arcc_LifeStylesBidcoLtd.LifestylesUSHoldcoInc.AndLifeStylesParentL.P.Member_documentation_en-US" xlink:label="lab_arcc_LifeStylesBidcoLtd.LifestylesUSHoldcoInc.AndLifeStylesParentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">LifeStyles Bidco Ltd., Lifestyles US Holdco, Inc. and LifeStyles Parent, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LifeStylesBidcoLtd.LifestylesUSHoldcoInc.AndLifeStylesParentL.P.Member" xlink:href="arcc-20260930.xsd#arcc_LifeStylesBidcoLtd.LifestylesUSHoldcoInc.AndLifeStylesParentL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LifeStylesBidcoLtd.LifestylesUSHoldcoInc.AndLifeStylesParentL.P.Member" xlink:to="lab_arcc_LifeStylesBidcoLtd.LifestylesUSHoldcoInc.AndLifeStylesParentL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock_terseLabel_en-US" xlink:label="lab_ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Insider Trading Policies and Procedures Not Adopted</link:label>
    <link:label id="lab_ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock_label_en-US" xlink:label="lab_ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insider Trading Policies and Procedures Not Adopted [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock" xlink:to="lab_ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember_019fed4d-3e56-74cc-88da-6f0e9b4b83c6_terseLabel_en-US" xlink:label="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">North Star Acquisitionco, LLC and Toucan Bidco Limited</link:label>
    <link:label id="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember_label_en-US" xlink:label="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">North Star Acquisitionco, LLC and Toucan Bidco Limited [Member]</link:label>
    <link:label id="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember_documentation_en-US" xlink:label="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">North Star Acquisitionco, LLC and Toucan Bidco Limited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:href="arcc-20260930.xsd#arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:to="lab_arcc_NorthStarAcquisitioncoLLCAndToucanBidcoLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt_terseLabel_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Expense of Enforcement, Amount</link:label>
    <link:label id="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt_label_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Expense of Enforcement, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:to="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP3Member_01a16e8f-0fb4-758c-8e2b-5c967aecb934_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, GBP 3</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP3Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP3Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, GBP 3 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP3Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP3Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, GBP 3</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractGBP3Member" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractGBP3Member"/>
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    <link:label id="lab_us-gaap_InterestIncomeOperatingPaidInKind_019fed4d-3d42-7cfc-aaf7-a9716360383d_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeOperatingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PIK interest income</link:label>
    <link:label id="lab_us-gaap_InterestIncomeOperatingPaidInKind_019fed4d-3d42-7f2b-ab85-f66d5974d724_negatedLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeOperatingPaidInKind" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">PIK interest</link:label>
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    <link:label id="lab_arcc_GroundPenetratingRadarSystemsLLCAndRCVIBuckeyeHoldingsLLCMember_019fed4d-3e56-794c-9ad6-d4f8eb57402b_terseLabel_en-US" xlink:label="lab_arcc_GroundPenetratingRadarSystemsLLCAndRCVIBuckeyeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ground Penetrating Radar Systems, LLC and RC VI Buckeye Holdings LLC</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractCAD2Member" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractCAD2Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractCAD2Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractCAD2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember_019fed4d-3dd3-75c8-bddd-983b820703f2_terseLabel_en-US" xlink:label="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NAS, LLC and Nationwide Marketing Group, LLC</link:label>
    <link:label id="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember_label_en-US" xlink:label="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NAS, LLC and Nationwide Marketing Group, LLC [Member]</link:label>
    <link:label id="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember_documentation_en-US" xlink:label="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NAS, LLC and Nationwide Marketing Group, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:href="arcc-20260930.xsd#arcc_NASLLCAndNationwideMarketingGroupLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:to="lab_arcc_NASLLCAndNationwideMarketingGroupLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CollisionSPSubcoLLCMember_019fed4d-3d42-7aeb-a7e9-76ab689a1311_terseLabel_en-US" xlink:label="lab_arcc_CollisionSPSubcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collision SP Subco, LLC</link:label>
    <link:label id="lab_arcc_CollisionSPSubcoLLCMember_label_en-US" xlink:label="lab_arcc_CollisionSPSubcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Collision SP Subco, LLC [Member]</link:label>
    <link:label id="lab_arcc_CollisionSPSubcoLLCMember_documentation_en-US" xlink:label="lab_arcc_CollisionSPSubcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Collision SP Subco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CollisionSPSubcoLLCMember" xlink:href="arcc-20260930.xsd#arcc_CollisionSPSubcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CollisionSPSubcoLLCMember" xlink:to="lab_arcc_CollisionSPSubcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_StatementGeographicalAxis_019fed4d-3e56-721b-a088-76a7901cf614_terseLabel_en-US" xlink:label="lab_srt_StatementGeographicalAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:label id="lab_srt_StatementGeographicalAxis_label_en-US" xlink:label="lab_srt_StatementGeographicalAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementGeographicalAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_StatementGeographicalAxis" xlink:to="lab_srt_StatementGeographicalAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount_019fed4d-3e56-70fa-80e4-36cac2ba7a0f_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total commitments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount_019fed4d-3e56-7997-be75-3c0019ac85a8_netLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US">Total revolving loan commitments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount_019fed4d-3e56-748f-b06a-bf25722e7754_verboseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total equity commitments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Support to Investee Contractually Required, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount" xlink:to="lab_us-gaap_InvestmentCompanyFinancialSupportToInvesteeContractuallyRequiredAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ViperBidcoInc.Member_019fed4d-3dd3-7f5f-8dae-327658a922ba_terseLabel_en-US" xlink:label="lab_arcc_ViperBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Viper Bidco, Inc.</link:label>
    <link:label id="lab_arcc_ViperBidcoInc.Member_label_en-US" xlink:label="lab_arcc_ViperBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Viper Bidco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ViperBidcoInc.Member_documentation_en-US" xlink:label="lab_arcc_ViperBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Viper Bidco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ViperBidcoInc.Member" xlink:href="arcc-20260930.xsd#arcc_ViperBidcoInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ViperBidcoInc.Member" xlink:to="lab_arcc_ViperBidcoInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RestrictedCash_019fed4d-3dd3-7dfb-8d62-75896cbc748f_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCash" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted cash</link:label>
    <link:label id="lab_us-gaap_RestrictedCash_019fed4d-3dd3-7a10-93e2-03c1be4e3e68_verboseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCash" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Restricted cash</link:label>
    <link:label id="lab_us-gaap_RestrictedCash_label_en-US" xlink:label="lab_us-gaap_RestrictedCash" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCash"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCash" xlink:to="lab_us-gaap_RestrictedCash" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019fed4d-3d42-7cec-8be2-616c56eb7fb1_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments measured at net asset value</link:label>
    <link:label id="lab_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_label_en-US" xlink:label="lab_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measured at Net Asset Value Per Share [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:to="lab_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentIssuerAffiliationAxis_019fed4d-3dd3-7eb5-8c8b-fd00a402dfac_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIssuerAffiliationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Issuer Affiliation [Axis]</link:label>
    <link:label id="lab_us-gaap_InvestmentIssuerAffiliationAxis_label_en-US" xlink:label="lab_us-gaap_InvestmentIssuerAffiliationAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Issuer Affiliation [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIssuerAffiliationAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIssuerAffiliationAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="lab_us-gaap_InvestmentIssuerAffiliationAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ArtivionIncMember_019fed4d-3dd3-7402-b179-d9a8c3406bc2_terseLabel_en-US" xlink:label="lab_arcc_ArtivionIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Artivion, Inc</link:label>
    <link:label id="lab_arcc_ArtivionIncMember_label_en-US" xlink:label="lab_arcc_ArtivionIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Artivion, Inc [Member]</link:label>
    <link:label id="lab_arcc_ArtivionIncMember_documentation_en-US" xlink:label="lab_arcc_ArtivionIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Artivion, Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ArtivionIncMember" xlink:href="arcc-20260930.xsd#arcc_ArtivionIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ArtivionIncMember" xlink:to="lab_arcc_ArtivionIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskCreditRisk_019fed4d-3e56-78d2-927a-3176aede987e_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskCreditRisk" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration of Credit Risk</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskCreditRisk_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskCreditRisk" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk, Credit Risk, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskCreditRisk" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskCreditRisk"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskCreditRisk" xlink:to="lab_us-gaap_ConcentrationRiskCreditRisk" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssets_019fed4d-3d42-7649-a356-ab5cf90e3580_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_us-gaap_OtherAssets_label_en-US" xlink:label="lab_us-gaap_OtherAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssets" xlink:to="lab_us-gaap_OtherAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SubordinatedCertificatesOfTheSDLPMember_019fed4d-3e56-73e0-a8a4-039204910e27_terseLabel_en-US" xlink:label="lab_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated certificates of the SDLP</link:label>
    <link:label id="lab_arcc_SubordinatedCertificatesOfTheSDLPMember_label_en-US" xlink:label="lab_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Certificates of the SDLP [Member]</link:label>
    <link:label id="lab_arcc_SubordinatedCertificatesOfTheSDLPMember_documentation_en-US" xlink:label="lab_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subordinated Certificates of the SDLP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:href="arcc-20260930.xsd#arcc_SubordinatedCertificatesOfTheSDLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:to="lab_arcc_SubordinatedCertificatesOfTheSDLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementMember_019fed4d-3dd3-7bad-af43-4709c1f27622_terseLabel_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Advisory and Management Agreement</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementMember_label_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement [Member]</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementMember_documentation_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentAdvisoryAndManagementAgreementMember" xlink:href="arcc-20260930.xsd#arcc_InvestmentAdvisoryAndManagementAgreementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentAdvisoryAndManagementAgreementMember" xlink:to="lab_arcc_InvestmentAdvisoryAndManagementAgreementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LegalEntityAxis_019fed4d-3d41-7315-b1a9-2dc13f36cace_terseLabel_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:label id="lab_dei_LegalEntityAxis_label_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis" xlink:to="lab_dei_LegalEntityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestExpenseDebt_019fed4d-3e56-7c59-ac68-be8ceaddeb9a_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stated interest expense</link:label>
    <link:label id="lab_us-gaap_InterestExpenseDebt_label_en-US" xlink:label="lab_us-gaap_InterestExpenseDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense, Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseDebt" xlink:to="lab_us-gaap_InterestExpenseDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_WestRegionMember_019fed4d-3d42-7cf2-a832-0ebe137aba9b_terseLabel_en-US" xlink:label="lab_us-gaap_WestRegionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">West</link:label>
    <link:label id="lab_us-gaap_WestRegionMember_label_en-US" xlink:label="lab_us-gaap_WestRegionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US West Region [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WestRegionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WestRegionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WestRegionMember" xlink:to="lab_us-gaap_WestRegionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NeptuneBidcoUSIncAndElliottMetronCoInvestorAggregatorLPMember_019fed4d-3e56-7fd0-807d-0ea765aa04cc_terseLabel_en-US" xlink:label="lab_arcc_NeptuneBidcoUSIncAndElliottMetronCoInvestorAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Neptune Bidco US Inc. and Elliott Metron Co-Investor Aggregator L.P.</link:label>
    <link:label id="lab_arcc_NeptuneBidcoUSIncAndElliottMetronCoInvestorAggregatorLPMember_label_en-US" xlink:label="lab_arcc_NeptuneBidcoUSIncAndElliottMetronCoInvestorAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Neptune Bidco US Inc. and Elliott Metron Co-Investor Aggregator L.P. [Member]</link:label>
    <link:label id="lab_arcc_NeptuneBidcoUSIncAndElliottMetronCoInvestorAggregatorLPMember_documentation_en-US" xlink:label="lab_arcc_NeptuneBidcoUSIncAndElliottMetronCoInvestorAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Neptune Bidco US Inc. and Elliott Metron Co-Investor Aggregator L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NeptuneBidcoUSIncAndElliottMetronCoInvestorAggregatorLPMember" xlink:href="arcc-20260930.xsd#arcc_NeptuneBidcoUSIncAndElliottMetronCoInvestorAggregatorLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NeptuneBidcoUSIncAndElliottMetronCoInvestorAggregatorLPMember" xlink:to="lab_arcc_NeptuneBidcoUSIncAndElliottMetronCoInvestorAggregatorLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SeniorDirectLendingProgramMember_019fed4d-3d42-792e-a74a-5ed24586e6f7_terseLabel_en-US" xlink:label="lab_arcc_SeniorDirectLendingProgramMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Direct Lending Program</link:label>
    <link:label id="lab_arcc_SeniorDirectLendingProgramMember_label_en-US" xlink:label="lab_arcc_SeniorDirectLendingProgramMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Direct Lending Program [Member]</link:label>
    <link:label id="lab_arcc_SeniorDirectLendingProgramMember_documentation_en-US" xlink:label="lab_arcc_SeniorDirectLendingProgramMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Senior Direct Lending Program</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SeniorDirectLendingProgramMember" xlink:href="arcc-20260930.xsd#arcc_SeniorDirectLendingProgramMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SeniorDirectLendingProgramMember" xlink:to="lab_arcc_SeniorDirectLendingProgramMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember_019fed4d-3e56-7555-9cb7-d4ce58e9470e_terseLabel_en-US" xlink:label="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Waverly Advisors, LLC and WAAM Topco, LLC</link:label>
    <link:label id="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember_label_en-US" xlink:label="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Waverly Advisors, LLC and WAAM Topco, LLC [Member]</link:label>
    <link:label id="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember_documentation_en-US" xlink:label="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Waverly Advisors, LLC and WAAM Topco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:href="arcc-20260930.xsd#arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:to="lab_arcc_WaverlyAdvisorsLLCAndWAAMTopcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationConsiderationTransferredImpliedValue_01a17ad2-3371-7fdc-ba7d-d7bc2f1a7cbb_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationConsiderationTransferredImpliedValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Implied value of merger agreement</link:label>
    <link:label id="lab_arcc_BusinessCombinationConsiderationTransferredImpliedValue_label_en-US" xlink:label="lab_arcc_BusinessCombinationConsiderationTransferredImpliedValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Consideration Transferred, Implied Value</link:label>
    <link:label id="lab_arcc_BusinessCombinationConsiderationTransferredImpliedValue_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationConsiderationTransferredImpliedValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Consideration Transferred, Implied Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationConsiderationTransferredImpliedValue" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationConsiderationTransferredImpliedValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationConsiderationTransferredImpliedValue" xlink:to="lab_arcc_BusinessCombinationConsiderationTransferredImpliedValue" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_O2025M4DividendsMember_019fed4d-3d42-70cf-80f3-f9e56ec33459_terseLabel_en-US" xlink:label="lab_arcc_O2025M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">April 29, 2025</link:label>
    <link:label id="lab_arcc_O2025M4DividendsMember_label_en-US" xlink:label="lab_arcc_O2025M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2025 M4 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2025M4DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2025M4DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Declared, May First Two Thousand Twenty Four O 2024 M5 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2025M4DividendsMember" xlink:href="arcc-20260930.xsd#arcc_O2025M4DividendsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_O2025M4DividendsMember" xlink:to="lab_arcc_O2025M4DividendsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember_019fed4d-3dd3-76e8-8fda-51e3afa5f413_terseLabel_en-US" xlink:label="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Spirit RR Holdings, Inc. and Winterfell Co-Invest SCSp</link:label>
    <link:label id="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember_label_en-US" xlink:label="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Spirit RR Holdings, Inc. and Winterfell Co-Invest SCSp [Member]</link:label>
    <link:label id="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember_documentation_en-US" xlink:label="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Spirit RR Holdings, Inc. and Winterfell Co-Invest SCSp</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:href="arcc-20260930.xsd#arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:to="lab_arcc_SpiritRRHoldingsIncAndWinterfellCoInvestSCSpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019fed4d-3dd3-7874-9655-a202f1a8125d_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019fed4d-3dd3-7475-a374-abe15d92b1cd_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019fed4d-3dd3-7125-9825-a3fd086aef67_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total cash, cash equivalents and restricted cash</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractJapanMember_019fed4d-3e56-78eb-8f08-90cfabbc255e_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractJapanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, Japan 1</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractJapanMember_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractJapanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, Japan [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractJapanMember_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractJapanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, Japan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractJapanMember" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractJapanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractJapanMember" xlink:to="lab_arcc_ForeignCurrencyForwardContractJapanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP1Member_019fed4d-3e56-7808-a2ec-69a39cea6936_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, GBP 1</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP1Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, GBP 1 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractGBP1Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractGBP1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, GBP 1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractGBP1Member" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractGBP1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractGBP1Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractGBP1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LHSBorrowerLLCLHEquityInvestorsL.P.LeafHomeLLCAndGCFundIVBlockerLLCMember_019fed4d-3e56-7a24-8889-9cb7e64e77f7_terseLabel_en-US" xlink:label="lab_arcc_LHSBorrowerLLCLHEquityInvestorsL.P.LeafHomeLLCAndGCFundIVBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LHS Borrower, LLC, LH Equity Investors, L.P., Leaf Home, LLC and GC Fund IV Blocker LLC</link:label>
    <link:label id="lab_arcc_LHSBorrowerLLCLHEquityInvestorsL.P.LeafHomeLLCAndGCFundIVBlockerLLCMember_label_en-US" xlink:label="lab_arcc_LHSBorrowerLLCLHEquityInvestorsL.P.LeafHomeLLCAndGCFundIVBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">LHS Borrower, LLC, LH Equity Investors, L.P., Leaf Home, LLC and GC Fund IV Blocker LLC [Member]</link:label>
    <link:label id="lab_arcc_LHSBorrowerLLCLHEquityInvestorsL.P.LeafHomeLLCAndGCFundIVBlockerLLCMember_documentation_en-US" xlink:label="lab_arcc_LHSBorrowerLLCLHEquityInvestorsL.P.LeafHomeLLCAndGCFundIVBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">LHS Borrower, LLC, LH Equity Investors, L.P., Leaf Home, LLC and GC Fund IV Blocker LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LHSBorrowerLLCLHEquityInvestorsL.P.LeafHomeLLCAndGCFundIVBlockerLLCMember" xlink:href="arcc-20260930.xsd#arcc_LHSBorrowerLLCLHEquityInvestorsL.P.LeafHomeLLCAndGCFundIVBlockerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LHSBorrowerLLCLHEquityInvestorsL.P.LeafHomeLLCAndGCFundIVBlockerLLCMember" xlink:to="lab_arcc_LHSBorrowerLLCLHEquityInvestorsL.P.LeafHomeLLCAndGCFundIVBlockerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember_019fed4d-3e56-7f4f-b42a-63c603ff6830_terseLabel_en-US" xlink:label="lab_arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GS SEER Group Borrower LLC and GS SEER Group Holdings, LLC</link:label>
    <link:label id="lab_arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GS SEER Group Borrower LLC and GS SEER Group Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GS SEER Group Borrower LLC and GS SEER Group Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember" xlink:to="lab_arcc_GSSEERGroupBorrowerLLCAndGSSEERGroupHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonNeosMember_terseLabel_en-US" xlink:label="lab_ecd_NonNeosMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-NEOs</link:label>
    <link:label id="lab_ecd_NonNeosMember_label_en-US" xlink:label="lab_ecd_NonNeosMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-NEOs [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonNeosMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonNeosMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonNeosMember" xlink:to="lab_ecd_NonNeosMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InterestAndCreditFacilityFeesMember_019fed4d-3d42-777b-adbf-a761ecbc646c_terseLabel_en-US" xlink:label="lab_arcc_InterestAndCreditFacilityFeesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest and credit facility fees</link:label>
    <link:label id="lab_arcc_InterestAndCreditFacilityFeesMember_label_en-US" xlink:label="lab_arcc_InterestAndCreditFacilityFeesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest And Credit Facility Fees [Member]</link:label>
    <link:label id="lab_arcc_InterestAndCreditFacilityFeesMember_documentation_en-US" xlink:label="lab_arcc_InterestAndCreditFacilityFeesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest And Credit Facility Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestAndCreditFacilityFeesMember" xlink:href="arcc-20260930.xsd#arcc_InterestAndCreditFacilityFeesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InterestAndCreditFacilityFeesMember" xlink:to="lab_arcc_InterestAndCreditFacilityFeesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember_019fed4d-3d42-7987-98ee-2ffde54a96a7_terseLabel_en-US" xlink:label="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC</link:label>
    <link:label id="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Essential Services Holding Corporation and OMERS Mahomes Investment Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember" xlink:to="lab_arcc_EssentialServicesHoldingCorporationAndOMERSMahomesInvestmentHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PayableToParticipants_019fed4d-3d42-7aba-954b-2a497b652083_terseLabel_en-US" xlink:label="lab_arcc_PayableToParticipants" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payable to participants</link:label>
    <link:label id="lab_arcc_PayableToParticipants_label_en-US" xlink:label="lab_arcc_PayableToParticipants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payable To Participants</link:label>
    <link:label id="lab_arcc_PayableToParticipants_documentation_en-US" xlink:label="lab_arcc_PayableToParticipants" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payable To Participants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PayableToParticipants" xlink:href="arcc-20260930.xsd#arcc_PayableToParticipants"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PayableToParticipants" xlink:to="lab_arcc_PayableToParticipants" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_019fed4d-3d42-783c-9888-5184f828921e_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongtermDebtTypeDomain" xlink:to="lab_us-gaap_LongtermDebtTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InterestRateSwap2Member_019fed4d-3dd3-734d-b3b4-3aa2960dce4c_terseLabel_en-US" xlink:label="lab_arcc_InterestRateSwap2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate swap 2</link:label>
    <link:label id="lab_arcc_InterestRateSwap2Member_label_en-US" xlink:label="lab_arcc_InterestRateSwap2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 2 [Member]</link:label>
    <link:label id="lab_arcc_InterestRateSwap2Member_documentation_en-US" xlink:label="lab_arcc_InterestRateSwap2Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 2</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestRateSwap2Member" xlink:href="arcc-20260930.xsd#arcc_InterestRateSwap2Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InterestRateSwap2Member" xlink:to="lab_arcc_InterestRateSwap2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_RangeAxis_019fed4d-3e56-7d5b-a9f0-7493bf057f40_terseLabel_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:label id="lab_srt_RangeAxis_label_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeAxis" xlink:to="lab_srt_RangeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CascadeParentInc.CascadeIntermediateIIInc.AndHaveliCascadeCoInvestIL.P.Member_019fed4d-3dd3-7dcd-96aa-c683d1fb9cde_terseLabel_en-US" xlink:label="lab_arcc_CascadeParentInc.CascadeIntermediateIIInc.AndHaveliCascadeCoInvestIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cascade Parent Inc., Cascade Intermediate II, Inc., and Haveli Cascade Co-Invest I, L.P.</link:label>
    <link:label id="lab_arcc_CascadeParentInc.CascadeIntermediateIIInc.AndHaveliCascadeCoInvestIL.P.Member_label_en-US" xlink:label="lab_arcc_CascadeParentInc.CascadeIntermediateIIInc.AndHaveliCascadeCoInvestIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cascade Parent Inc., Cascade Intermediate II, Inc., and Haveli Cascade Co-Invest I, L.P. [Member]</link:label>
    <link:label id="lab_arcc_CascadeParentInc.CascadeIntermediateIIInc.AndHaveliCascadeCoInvestIL.P.Member_documentation_en-US" xlink:label="lab_arcc_CascadeParentInc.CascadeIntermediateIIInc.AndHaveliCascadeCoInvestIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cascade Parent Inc., Cascade Intermediate II, Inc., and Haveli Cascade Co-Invest I, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CascadeParentInc.CascadeIntermediateIIInc.AndHaveliCascadeCoInvestIL.P.Member" xlink:href="arcc-20260930.xsd#arcc_CascadeParentInc.CascadeIntermediateIIInc.AndHaveliCascadeCoInvestIL.P.Member"/>
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    <link:label id="lab_us-gaap_ManagementAndServiceFeesBaseRate_019fed4d-3e56-772d-8e84-778cfde3e543_terseLabel_en-US" xlink:label="lab_us-gaap_ManagementAndServiceFeesBaseRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base management fee rate</link:label>
    <link:label id="lab_us-gaap_ManagementAndServiceFeesBaseRate_label_en-US" xlink:label="lab_us-gaap_ManagementAndServiceFeesBaseRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Management and Service Fees, Base Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ManagementAndServiceFeesBaseRate" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ManagementAndServiceFeesBaseRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ManagementAndServiceFeesBaseRate" xlink:to="lab_us-gaap_ManagementAndServiceFeesBaseRate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_019fed4d-3e56-7018-8e10-c98b785ddc3f_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Net Realized and Unrealized Gains (Losses) on Derivative Instruments</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:to="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TopGolfInternationalLLCAndTopGolfTopcoLLCMember_019fed4d-3d42-718c-99f5-ff048f5c5fd7_terseLabel_en-US" xlink:label="lab_arcc_TopGolfInternationalLLCAndTopGolfTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TopGolf International, LLC and TopGolf Topco, LLC</link:label>
    <link:label id="lab_arcc_TopGolfInternationalLLCAndTopGolfTopcoLLCMember_label_en-US" xlink:label="lab_arcc_TopGolfInternationalLLCAndTopGolfTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TopGolf International, LLC and TopGolf Topco, LLC [Member]</link:label>
    <link:label id="lab_arcc_TopGolfInternationalLLCAndTopGolfTopcoLLCMember_documentation_en-US" xlink:label="lab_arcc_TopGolfInternationalLLCAndTopGolfTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TopGolf International, LLC and TopGolf Topco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TopGolfInternationalLLCAndTopGolfTopcoLLCMember" xlink:href="arcc-20260930.xsd#arcc_TopGolfInternationalLLCAndTopGolfTopcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TopGolfInternationalLLCAndTopGolfTopcoLLCMember" xlink:to="lab_arcc_TopGolfInternationalLLCAndTopGolfTopcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AwardTypeAxis_terseLabel_en-US" xlink:label="lab_us-gaap_AwardTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Type</link:label>
    <link:label id="lab_us-gaap_AwardTypeAxis_label_en-US" xlink:label="lab_us-gaap_AwardTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AwardTypeAxis" xlink:to="lab_us-gaap_AwardTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NamedExecutiveOfficersFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_NamedExecutiveOfficersFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Named Executive Officers, Footnote</link:label>
    <link:label id="lab_ecd_NamedExecutiveOfficersFnTextBlock_label_en-US" xlink:label="lab_ecd_NamedExecutiveOfficersFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Named Executive Officers, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NamedExecutiveOfficersFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NamedExecutiveOfficersFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NamedExecutiveOfficersFnTextBlock" xlink:to="lab_ecd_NamedExecutiveOfficersFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_019fed4d-3dd3-7a67-adb6-a4227df34edd_totalLabel_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gain (loss) for federal tax purposes</link:label>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_019fed4d-3dd3-75a0-9164-aa625603b09a_negatedLabel_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Unrealized depreciation</link:label>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_label_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Tax Basis, Unrealized Gain (Loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet"/>
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    <link:label id="lab_arcc_LightbeamBidcoIncMember_019fed4d-3dd3-7041-b95f-170ce38242c4_terseLabel_en-US" xlink:label="lab_arcc_LightbeamBidcoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lightbeam Bidco, Inc</link:label>
    <link:label id="lab_arcc_LightbeamBidcoIncMember_label_en-US" xlink:label="lab_arcc_LightbeamBidcoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lightbeam Bidco, Inc [Member]</link:label>
    <link:label id="lab_arcc_LightbeamBidcoIncMember_documentation_en-US" xlink:label="lab_arcc_LightbeamBidcoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Lightbeam Bidco, Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LightbeamBidcoIncMember" xlink:href="arcc-20260930.xsd#arcc_LightbeamBidcoIncMember"/>
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    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_019fed4d-3e56-7808-a2a4-01acb389441a_verboseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accumulated undistributed earnings</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_019fed4d-3e56-7d14-a53e-cf68e58360e1_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated earnings</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings (Accumulated Deficit)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="lab_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NortheastRegionMember_019fed4d-3dd3-7840-8105-29935f09c6f8_terseLabel_en-US" xlink:label="lab_us-gaap_NortheastRegionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Northeast</link:label>
    <link:label id="lab_us-gaap_NortheastRegionMember_label_en-US" xlink:label="lab_us-gaap_NortheastRegionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Northeast Region [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NortheastRegionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NortheastRegionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NortheastRegionMember" xlink:to="lab_us-gaap_NortheastRegionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember_019fed4d-3d41-721b-9d7c-178a8dc2c5cb_terseLabel_en-US" xlink:label="lab_arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amerivet Partners Management, Inc. and AVE Holdings LP</link:label>
    <link:label id="lab_arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember_label_en-US" xlink:label="lab_arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amerivet Partners Management, Inc. and AVE Holdings LP [Member]</link:label>
    <link:label id="lab_arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amerivet Partners Management, Inc. and AVE Holdings LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember" xlink:to="lab_arcc_AmerivetPartnersManagementIncAndAVEHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember_019fed4d-3d42-70a8-8443-dbbdb66678d7_terseLabel_en-US" xlink:label="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">VPROP Operating, LLC and V SandCo, LLC</link:label>
    <link:label id="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember_label_en-US" xlink:label="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">VPROP Operating, LLC and V SandCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember_documentation_en-US" xlink:label="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">VPROP Operating, LLC and V SandCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_VPROPOperatingLLCAndVSandCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:to="lab_arcc_VPROPOperatingLLCAndVSandCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardsCloseToMnpiDiscTable_terseLabel_en-US" xlink:label="lab_ecd_AwardsCloseToMnpiDiscTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Awards Close in Time to MNPI Disclosures</link:label>
    <link:label id="lab_ecd_AwardsCloseToMnpiDiscTable_label_en-US" xlink:label="lab_ecd_AwardsCloseToMnpiDiscTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Awards Close in Time to MNPI Disclosures [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardsCloseToMnpiDiscTable" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardsCloseToMnpiDiscTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardsCloseToMnpiDiscTable" xlink:to="lab_ecd_AwardsCloseToMnpiDiscTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockMember_019fed4d-3d42-71b1-b9f7-b4af4976fd1f_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Stock</link:label>
    <link:label id="lab_us-gaap_CommonStockMember_label_en-US" xlink:label="lab_us-gaap_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember" xlink:to="lab_us-gaap_CommonStockMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EmpowerPaymentsInvestorLLCMember_019fed4d-3dd3-7b25-bccb-c40dddb7515a_terseLabel_en-US" xlink:label="lab_arcc_EmpowerPaymentsInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Empower Payments Investor, LLC</link:label>
    <link:label id="lab_arcc_EmpowerPaymentsInvestorLLCMember_label_en-US" xlink:label="lab_arcc_EmpowerPaymentsInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Empower Payments Investor, LLC [Member]</link:label>
    <link:label id="lab_arcc_EmpowerPaymentsInvestorLLCMember_documentation_en-US" xlink:label="lab_arcc_EmpowerPaymentsInvestorLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Empower Payments Investor, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EmpowerPaymentsInvestorLLCMember" xlink:href="arcc-20260930.xsd#arcc_EmpowerPaymentsInvestorLLCMember"/>
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    <link:label id="lab_arcc_ECapitalFinanceCorpMember_019fed4d-3dd3-74f8-841c-b9b62fb6bf0c_terseLabel_en-US" xlink:label="lab_arcc_ECapitalFinanceCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">eCapital Finance Corp.</link:label>
    <link:label id="lab_arcc_ECapitalFinanceCorpMember_label_en-US" xlink:label="lab_arcc_ECapitalFinanceCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">eCapital Finance Corp. [Member]</link:label>
    <link:label id="lab_arcc_ECapitalFinanceCorpMember_documentation_en-US" xlink:label="lab_arcc_ECapitalFinanceCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">eCapital Finance Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ECapitalFinanceCorpMember" xlink:href="arcc-20260930.xsd#arcc_ECapitalFinanceCorpMember"/>
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    <link:label id="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember_019fed4d-3e56-7128-b011-a945cfef73ab_terseLabel_en-US" xlink:label="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Eagle Football Holdings BidCo Limited</link:label>
    <link:label id="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember_label_en-US" xlink:label="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Eagle Football Holdings BidCo Limited and Eagle Football Holdings Limited [Member]</link:label>
    <link:label id="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember_documentation_en-US" xlink:label="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eagle Football Holdings BidCo Limited and Eagle Football Holdings Limited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember" xlink:href="arcc-20260930.xsd#arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember" xlink:to="lab_arcc_EagleFootballHoldingsBidCoLimitedAndEagleFootballHoldingsLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NonUsMember_019fed4d-3dd3-7bf4-93bd-374f76e54e4d_terseLabel_en-US" xlink:label="lab_us-gaap_NonUsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">International</link:label>
    <link:label id="lab_us-gaap_NonUsMember_label_en-US" xlink:label="lab_us-gaap_NonUsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-US [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonUsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NonUsMember" xlink:to="lab_us-gaap_NonUsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PaveAmericaHoldingLLCMember_019fed4d-3e56-78ac-8566-5afd0d5ad10e_terseLabel_en-US" xlink:label="lab_arcc_PaveAmericaHoldingLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pave America Holding, LLC</link:label>
    <link:label id="lab_arcc_PaveAmericaHoldingLLCMember_label_en-US" xlink:label="lab_arcc_PaveAmericaHoldingLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pave America Holding, LLC [Member]</link:label>
    <link:label id="lab_arcc_PaveAmericaHoldingLLCMember_documentation_en-US" xlink:label="lab_arcc_PaveAmericaHoldingLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pave America Holding, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PaveAmericaHoldingLLCMember" xlink:href="arcc-20260930.xsd#arcc_PaveAmericaHoldingLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PaveAmericaHoldingLLCMember" xlink:to="lab_arcc_PaveAmericaHoldingLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MembersEquityAttributableToNoncontrollingInterest_019fed4d-3dd3-7c8a-ba12-691d4a51dbcf_terseLabel_en-US" xlink:label="lab_us-gaap_MembersEquityAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-controlling interests in Consolidated IHAM Vehicles</link:label>
    <link:label id="lab_us-gaap_MembersEquityAttributableToNoncontrollingInterest_label_en-US" xlink:label="lab_us-gaap_MembersEquityAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Members' Equity Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersEquityAttributableToNoncontrollingInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MembersEquityAttributableToNoncontrollingInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MembersEquityAttributableToNoncontrollingInterest" xlink:to="lab_us-gaap_MembersEquityAttributableToNoncontrollingInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AdministrationAgreementMember_019fed4d-3e56-765d-b80b-b6036a3abc8e_terseLabel_en-US" xlink:label="lab_arcc_AdministrationAgreementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Administration Agreement</link:label>
    <link:label id="lab_arcc_AdministrationAgreementMember_label_en-US" xlink:label="lab_arcc_AdministrationAgreementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Administration Agreement [Member]</link:label>
    <link:label id="lab_arcc_AdministrationAgreementMember_documentation_en-US" xlink:label="lab_arcc_AdministrationAgreementMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Administration Agreement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AdministrationAgreementMember" xlink:href="arcc-20260930.xsd#arcc_AdministrationAgreementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AdministrationAgreementMember" xlink:to="lab_arcc_AdministrationAgreementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IncreaseDecreaseInInterestRateSwapCollateralPayable_019fed4d-3dd3-7295-9c91-6ce094cda478_terseLabel_en-US" xlink:label="lab_arcc_IncreaseDecreaseInInterestRateSwapCollateralPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate swap collateral payable</link:label>
    <link:label id="lab_arcc_IncreaseDecreaseInInterestRateSwapCollateralPayable_label_en-US" xlink:label="lab_arcc_IncreaseDecreaseInInterestRateSwapCollateralPayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) In Interest Rate Swap Collateral Payable</link:label>
    <link:label id="lab_arcc_IncreaseDecreaseInInterestRateSwapCollateralPayable_documentation_en-US" xlink:label="lab_arcc_IncreaseDecreaseInInterestRateSwapCollateralPayable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase (Decrease) In Interest Rate Swap Collateral Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IncreaseDecreaseInInterestRateSwapCollateralPayable" xlink:href="arcc-20260930.xsd#arcc_IncreaseDecreaseInInterestRateSwapCollateralPayable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IncreaseDecreaseInInterestRateSwapCollateralPayable" xlink:to="lab_arcc_IncreaseDecreaseInInterestRateSwapCollateralPayable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember_019fed4d-3d42-793a-aaef-186b5dd412a0_terseLabel_en-US" xlink:label="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DOXA Insurance Holdings LLC and Rocket Co-Invest, SLP</link:label>
    <link:label id="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember_label_en-US" xlink:label="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">DOXA Insurance Holdings LLC and Rocket Co-Invest, SLP [Member]</link:label>
    <link:label id="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember_documentation_en-US" xlink:label="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">DOXA Insurance Holdings LLC and Rocket Co-Invest, SLP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember" xlink:href="arcc-20260930.xsd#arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember" xlink:to="lab_arcc_DOXAInsuranceHoldingsLLCAndRocketCoInvestSLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CapitalGoodsMember_019fed4d-3e56-71a3-9c5f-0e1e146d5ccc_terseLabel_en-US" xlink:label="lab_arcc_CapitalGoodsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Goods</link:label>
    <link:label id="lab_arcc_CapitalGoodsMember_label_en-US" xlink:label="lab_arcc_CapitalGoodsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Goods [Member]</link:label>
    <link:label id="lab_arcc_CapitalGoodsMember_documentation_en-US" xlink:label="lab_arcc_CapitalGoodsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Capital Goods</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CapitalGoodsMember" xlink:href="arcc-20260930.xsd#arcc_CapitalGoodsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CapitalGoodsMember" xlink:to="lab_arcc_CapitalGoodsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BluejackFireAcquisitionInc.AndBluejackFireHoldingsLLCMember_019fed4d-3d42-79c1-b3fa-e5381e760c61_terseLabel_en-US" xlink:label="lab_arcc_BluejackFireAcquisitionInc.AndBluejackFireHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bluejack Fire Acquisition, Inc. and Bluejack Fire Holdings LLC</link:label>
    <link:label id="lab_arcc_BluejackFireAcquisitionInc.AndBluejackFireHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_BluejackFireAcquisitionInc.AndBluejackFireHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bluejack Fire Acquisition, Inc. and Bluejack Fire Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_BluejackFireAcquisitionInc.AndBluejackFireHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_BluejackFireAcquisitionInc.AndBluejackFireHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bluejack Fire Acquisition, Inc. and Bluejack Fire Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BluejackFireAcquisitionInc.AndBluejackFireHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_BluejackFireAcquisitionInc.AndBluejackFireHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BluejackFireAcquisitionInc.AndBluejackFireHoldingsLLCMember" xlink:to="lab_arcc_BluejackFireAcquisitionInc.AndBluejackFireHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskByBenchmarkAxis_019fed4d-3dd3-79f6-a0d3-fdd727206611_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk Benchmark [Axis]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskByBenchmarkAxis_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Benchmark [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="lab_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_019fed4d-3dd3-7e9d-97d0-db906b446f53_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Contract [Domain]</link:label>
    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_label_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Contract [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeContractTypeDomain" xlink:to="lab_us-gaap_DerivativeContractTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RedwoodServicesLPMember_019fed4d-3dd3-7d94-97b0-53e8d9fe146b_terseLabel_en-US" xlink:label="lab_arcc_RedwoodServicesLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redwood Services LP</link:label>
    <link:label id="lab_arcc_RedwoodServicesLPMember_label_en-US" xlink:label="lab_arcc_RedwoodServicesLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Redwood Services LP [Member]</link:label>
    <link:label id="lab_arcc_RedwoodServicesLPMember_documentation_en-US" xlink:label="lab_arcc_RedwoodServicesLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Redwood Services LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RedwoodServicesLPMember" xlink:href="arcc-20260930.xsd#arcc_RedwoodServicesLPMember"/>
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    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_019fed4d-3dd3-7067-ad72-66e1236f3406_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total liabilities and stockholders&#8217; equity</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CloudSoftwareGroupIncPicardParentIncCloudSoftwareGroupHoldingsIncPicardHoldCoLLCAndElliottAltoCoInvestorAggregatorLPMember_019fed4d-3d42-7416-bb8a-4e5e5576d6e4_terseLabel_en-US" xlink:label="lab_arcc_CloudSoftwareGroupIncPicardParentIncCloudSoftwareGroupHoldingsIncPicardHoldCoLLCAndElliottAltoCoInvestorAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cloud Software Group, Inc., Picard Parent, Inc., Cloud Software Group Holdings, Inc., Picard HoldCo, LLC and Elliott Alto Co-Investor Aggregator L.P.</link:label>
    <link:label id="lab_arcc_CloudSoftwareGroupIncPicardParentIncCloudSoftwareGroupHoldingsIncPicardHoldCoLLCAndElliottAltoCoInvestorAggregatorLPMember_label_en-US" xlink:label="lab_arcc_CloudSoftwareGroupIncPicardParentIncCloudSoftwareGroupHoldingsIncPicardHoldCoLLCAndElliottAltoCoInvestorAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cloud Software Group, Inc., Picard Parent, Inc., Cloud Software Group Holdings, Inc., Picard HoldCo, LLC and Elliott Alto Co-Investor Aggregator L.P. [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_CloudSoftwareGroupIncPicardParentIncCloudSoftwareGroupHoldingsIncPicardHoldCoLLCAndElliottAltoCoInvestorAggregatorLPMember" xlink:href="arcc-20260930.xsd#arcc_CloudSoftwareGroupIncPicardParentIncCloudSoftwareGroupHoldingsIncPicardHoldCoLLCAndElliottAltoCoInvestorAggregatorLPMember"/>
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    <link:label id="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember_019fed4d-3d42-78dd-a7a2-7fec08576d94_terseLabel_en-US" xlink:label="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Display Holding Company, Inc., Saldon Holdings, Inc. and Fastsigns Holdings Inc.</link:label>
    <link:label id="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember_label_en-US" xlink:label="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Display Holding Company, Inc., Saldon Holdings, Inc. and Fastsigns Holdings Inc. [Member]</link:label>
    <link:label id="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Display Holding Company, Inc., Saldon Holdings, Inc. and Fastsigns Holdings Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:to="lab_arcc_DisplayHoldingCompanyIncSaldonHoldingsIncAndFastsignsHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member_019fed4d-3d42-71f3-99c3-b4ec5d93afdd_terseLabel_en-US" xlink:label="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">WebPT, Inc. and WPT Intermediate Holdco, Inc.</link:label>
    <link:label id="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member_label_en-US" xlink:label="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">WebPT, Inc. and WPT Intermediate Holdco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member_documentation_en-US" xlink:label="lab_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">WebPT, Inc. and WPT Intermediate Holdco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member" xlink:href="arcc-20260930.xsd#arcc_WebPTInc.AndWPTIntermediateHoldcoInc.Member"/>
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    <link:label id="lab_us-gaap_EmployeeStockOptionMember_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeStockOptionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee Stock Option</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeStockOptionMember" xlink:to="lab_us-gaap_EmployeeStockOptionMember" xlink:type="arc" order="1"/>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases"/>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_UnityPurchaserLLCAndUnityUltimateHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_UnityPurchaserLLCAndUnityUltimateHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_UnityPurchaserLLCAndUnityUltimateHoldingsLPMember" xlink:to="lab_arcc_UnityPurchaserLLCAndUnityUltimateHoldingsLPMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_label_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_Additional402vDisclosureTextBlock" xlink:to="lab_ecd_Additional402vDisclosureTextBlock" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_RelatedPartyDomain_019fed4d-3e56-7a0d-ba7a-8e71499e8f9b_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party [Domain]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyDomain_label_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related and Nonrelated Parties [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyDomain" xlink:to="lab_us-gaap_RelatedPartyDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TeamAcquisitionLLCAugustaSportswearInc.AndTeamHoldingLLCMember_01a15dcf-45ff-7d27-b440-e8ddd03c94cb_terseLabel_en-US" xlink:label="lab_arcc_TeamAcquisitionLLCAugustaSportswearInc.AndTeamHoldingLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Team Acquisition, LLC, Augusta Sportswear, Inc., and Team Holding, LLC</link:label>
    <link:label id="lab_arcc_TeamAcquisitionLLCAugustaSportswearInc.AndTeamHoldingLLCMember_label_en-US" xlink:label="lab_arcc_TeamAcquisitionLLCAugustaSportswearInc.AndTeamHoldingLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Team Acquisition, LLC, Augusta Sportswear, Inc., and Team Holding, LLC [Member]</link:label>
    <link:label id="lab_arcc_TeamAcquisitionLLCAugustaSportswearInc.AndTeamHoldingLLCMember_documentation_en-US" xlink:label="lab_arcc_TeamAcquisitionLLCAugustaSportswearInc.AndTeamHoldingLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Team Acquisition, LLC, Augusta Sportswear, Inc., and Team Holding, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TeamAcquisitionLLCAugustaSportswearInc.AndTeamHoldingLLCMember" xlink:href="arcc-20260930.xsd#arcc_TeamAcquisitionLLCAugustaSportswearInc.AndTeamHoldingLLCMember"/>
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    <link:label id="lab_arcc_InvestmentsAtFairValueAndOtherNonQualifyingAssetsMember_019fed4d-3dd3-7c1a-8f59-eb9dd1c59f87_terseLabel_en-US" xlink:label="lab_arcc_InvestmentsAtFairValueAndOtherNonQualifyingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments, at fair value, and other non-qualifying assets</link:label>
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    <link:label id="lab_arcc_InvestmentsAtFairValueAndOtherNonQualifyingAssetsMember_documentation_en-US" xlink:label="lab_arcc_InvestmentsAtFairValueAndOtherNonQualifyingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investments, At Fair Value, And Other Non-Qualifying Assets</link:label>
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    <link:label id="lab_arcc_GothamGreensHoldingsPBCMember_019fed4d-3dd3-72cf-845c-d0ff7db4d3dc_terseLabel_en-US" xlink:label="lab_arcc_GothamGreensHoldingsPBCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gotham Greens Holdings, PBC</link:label>
    <link:label id="lab_arcc_GothamGreensHoldingsPBCMember_label_en-US" xlink:label="lab_arcc_GothamGreensHoldingsPBCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gotham Greens Holdings, PBC [Member]</link:label>
    <link:label id="lab_arcc_GothamGreensHoldingsPBCMember_documentation_en-US" xlink:label="lab_arcc_GothamGreensHoldingsPBCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gotham Greens Holdings, PBC</link:label>
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    <link:label id="lab_arcc_KBHSAcquisitionLLCDbaAlitaCareLLCMember_019fed4d-3dd3-7b0f-b8b9-93b57befc0bc_terseLabel_en-US" xlink:label="lab_arcc_KBHSAcquisitionLLCDbaAlitaCareLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">KBHS Acquisition, LLC (d/b/a Alita Care, LLC)</link:label>
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    <link:label id="lab_arcc_LeviathanIntermediateHoldcoLLCAndLeviathanHoldingsLPMember_019fed4d-3e56-7071-9b67-aa7a0e3d66e1_terseLabel_en-US" xlink:label="lab_arcc_LeviathanIntermediateHoldcoLLCAndLeviathanHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leviathan Intermediate Holdco, LLC and Leviathan Holdings, L.P.</link:label>
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    <link:label id="lab_ecd_AwardsCloseToMnpiDiscIndName_terseLabel_en-US" xlink:label="lab_ecd_AwardsCloseToMnpiDiscIndName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
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    <link:label id="lab_arcc_WellsFargoBankNationalAssociationMember_01a17add-b6d8-7fd8-a61f-431ff6a13aa4_terseLabel_en-US" xlink:label="lab_arcc_WellsFargoBankNationalAssociationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wells Fargo Bank, National Association</link:label>
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    <link:label id="lab_arcc_WellsFargoBankNationalAssociationMember_documentation_en-US" xlink:label="lab_arcc_WellsFargoBankNationalAssociationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Wells Fargo Bank, National Association</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WellsFargoBankNationalAssociationMember" xlink:to="lab_arcc_WellsFargoBankNationalAssociationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_October2036ClassBCLOLoansMember_019fed4d-3e56-739c-bd46-0537e23acfef_terseLabel_en-US" xlink:label="lab_arcc_October2036ClassBCLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">October 2036 Class B CLO Loans</link:label>
    <link:label id="lab_arcc_October2036ClassBCLOLoansMember_label_en-US" xlink:label="lab_arcc_October2036ClassBCLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">October 2036 Class B CLO Loans [Member]</link:label>
    <link:label id="lab_arcc_October2036ClassBCLOLoansMember_documentation_en-US" xlink:label="lab_arcc_October2036ClassBCLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">October 2036 Class B CLO Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_October2036ClassBCLOLoansMember" xlink:href="arcc-20260930.xsd#arcc_October2036ClassBCLOLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_October2036ClassBCLOLoansMember" xlink:to="lab_arcc_October2036ClassBCLOLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityAverageOutstandingAmount_019fed4d-3dd3-79bb-8dbd-7830d37e546a_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average outstanding balance</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityAverageOutstandingAmount_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Average Outstanding Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityAverageOutstandingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:to="lab_us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentIdentifierAxis_019fed4d-3e55-7487-8d54-c3b737292814_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Identifier [Axis]</link:label>
    <link:label id="lab_us-gaap_InvestmentIdentifierAxis_label_en-US" xlink:label="lab_us-gaap_InvestmentIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Identifier [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIdentifierAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIdentifierAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIdentifierAxis" xlink:to="lab_us-gaap_InvestmentIdentifierAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember_terseLabel_en-US" xlink:label="lab_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested</link:label>
    <link:label id="lab_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember_label_en-US" xlink:label="lab_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:to="lab_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TelleTireAutoServiceLLCTelleTireHoldcoLLCAndNextHorizonCapitalTireCoSPVLPMember_019fed4d-3e56-7b47-a690-20e37cac7e51_terseLabel_en-US" xlink:label="lab_arcc_TelleTireAutoServiceLLCTelleTireHoldcoLLCAndNextHorizonCapitalTireCoSPVLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Telle Tire &amp; Auto Service, LLC, Telle Tire Holdco, LLC, and Next Horizon Capital TireCo SPV, LP</link:label>
    <link:label id="lab_arcc_TelleTireAutoServiceLLCTelleTireHoldcoLLCAndNextHorizonCapitalTireCoSPVLPMember_label_en-US" xlink:label="lab_arcc_TelleTireAutoServiceLLCTelleTireHoldcoLLCAndNextHorizonCapitalTireCoSPVLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Telle Tire &amp; Auto Service, LLC, Telle Tire Holdco, LLC, and Next Horizon Capital TireCo SPV, LP [Member]</link:label>
    <link:label id="lab_arcc_TelleTireAutoServiceLLCTelleTireHoldcoLLCAndNextHorizonCapitalTireCoSPVLPMember_documentation_en-US" xlink:label="lab_arcc_TelleTireAutoServiceLLCTelleTireHoldcoLLCAndNextHorizonCapitalTireCoSPVLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Telle Tire &amp; Auto Service, LLC, Telle Tire Holdco, LLC, and Next Horizon Capital TireCo SPV, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TelleTireAutoServiceLLCTelleTireHoldcoLLCAndNextHorizonCapitalTireCoSPVLPMember" xlink:href="arcc-20260930.xsd#arcc_TelleTireAutoServiceLLCTelleTireHoldcoLLCAndNextHorizonCapitalTireCoSPVLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TelleTireAutoServiceLLCTelleTireHoldcoLLCAndNextHorizonCapitalTireCoSPVLPMember" xlink:to="lab_arcc_TelleTireAutoServiceLLCTelleTireHoldcoLLCAndNextHorizonCapitalTireCoSPVLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BRGSportsLLCAndRiddellSportsEnterprisesLLCMember_01a1581b-5c1c-7804-9651-269636568126_terseLabel_en-US" xlink:label="lab_arcc_BRGSportsLLCAndRiddellSportsEnterprisesLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BRG Sports, LLC and Riddell Sports Enterprises LLC</link:label>
    <link:label id="lab_arcc_BRGSportsLLCAndRiddellSportsEnterprisesLLCMember_label_en-US" xlink:label="lab_arcc_BRGSportsLLCAndRiddellSportsEnterprisesLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BRG Sports, LLC and Riddell Sports Enterprises LLC [Member]</link:label>
    <link:label id="lab_arcc_BRGSportsLLCAndRiddellSportsEnterprisesLLCMember_documentation_en-US" xlink:label="lab_arcc_BRGSportsLLCAndRiddellSportsEnterprisesLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BRG Sports, LLC and Riddell Sports Enterprises LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BRGSportsLLCAndRiddellSportsEnterprisesLLCMember" xlink:href="arcc-20260930.xsd#arcc_BRGSportsLLCAndRiddellSportsEnterprisesLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BRGSportsLLCAndRiddellSportsEnterprisesLLCMember" xlink:to="lab_arcc_BRGSportsLLCAndRiddellSportsEnterprisesLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ZBSMechanicalGroupCoInvestFund2LLCAndZBSMechanicalGroupCoInvestIIFund2LLCMember_019fed4d-3e56-7046-ba27-34977e1ac9ab_terseLabel_en-US" xlink:label="lab_arcc_ZBSMechanicalGroupCoInvestFund2LLCAndZBSMechanicalGroupCoInvestIIFund2LLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ZBS Mechanical Group Co-Invest Fund 2, LLC and ZBS Mechanical Group Co-Invest II Fund 2, LLC</link:label>
    <link:label id="lab_arcc_ZBSMechanicalGroupCoInvestFund2LLCAndZBSMechanicalGroupCoInvestIIFund2LLCMember_label_en-US" xlink:label="lab_arcc_ZBSMechanicalGroupCoInvestFund2LLCAndZBSMechanicalGroupCoInvestIIFund2LLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ZBS Mechanical Group Co-Invest Fund 2, LLC and ZBS Mechanical Group Co-Invest II Fund 2, LLC [Member]</link:label>
    <link:label id="lab_arcc_ZBSMechanicalGroupCoInvestFund2LLCAndZBSMechanicalGroupCoInvestIIFund2LLCMember_documentation_en-US" xlink:label="lab_arcc_ZBSMechanicalGroupCoInvestFund2LLCAndZBSMechanicalGroupCoInvestIIFund2LLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ZBS Mechanical Group Co-Invest Fund 2, LLC and ZBS Mechanical Group Co-Invest II Fund 2, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ZBSMechanicalGroupCoInvestFund2LLCAndZBSMechanicalGroupCoInvestIIFund2LLCMember" xlink:href="arcc-20260930.xsd#arcc_ZBSMechanicalGroupCoInvestFund2LLCAndZBSMechanicalGroupCoInvestIIFund2LLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ZBSMechanicalGroupCoInvestFund2LLCAndZBSMechanicalGroupCoInvestIIFund2LLCMember" xlink:to="lab_arcc_ZBSMechanicalGroupCoInvestFund2LLCAndZBSMechanicalGroupCoInvestIIFund2LLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MarketApproachValuationTechniqueMember_019fed4d-3d42-7c7c-baca-8ba53e1599cc_terseLabel_en-US" xlink:label="lab_us-gaap_MarketApproachValuationTechniqueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EV market multiple analysis</link:label>
    <link:label id="lab_us-gaap_MarketApproachValuationTechniqueMember_label_en-US" xlink:label="lab_us-gaap_MarketApproachValuationTechniqueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation, Market Approach [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketApproachValuationTechniqueMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MarketApproachValuationTechniqueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MarketApproachValuationTechniqueMember" xlink:to="lab_us-gaap_MarketApproachValuationTechniqueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SaleOfStockPricePerShare_019fed4d-3d42-7af6-b859-dc6b26ac8257_terseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockPricePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average Offering Price Per Share (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_SaleOfStockPricePerShare_label_en-US" xlink:label="lab_us-gaap_SaleOfStockPricePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Stock, Price Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockPricePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockPricePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SaleOfStockPricePerShare" xlink:to="lab_us-gaap_SaleOfStockPricePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WSHPFCAcquisitionLLCAndWSHPFCHoldingsLLCMember_019fed4d-3dd3-73a5-812e-e35c1738492e_terseLabel_en-US" xlink:label="lab_arcc_WSHPFCAcquisitionLLCAndWSHPFCHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">WSHP FC Acquisition LLC and WSHP FC Holdings LLC</link:label>
    <link:label id="lab_arcc_WSHPFCAcquisitionLLCAndWSHPFCHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_WSHPFCAcquisitionLLCAndWSHPFCHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">WSHP FC Acquisition LLC and WSHP FC Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_WSHPFCAcquisitionLLCAndWSHPFCHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_WSHPFCAcquisitionLLCAndWSHPFCHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">WSHP FC Acquisition LLC and WSHP FC Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WSHPFCAcquisitionLLCAndWSHPFCHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_WSHPFCAcquisitionLLCAndWSHPFCHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WSHPFCAcquisitionLLCAndWSHPFCHoldingsLLCMember" xlink:to="lab_arcc_WSHPFCAcquisitionLLCAndWSHPFCHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DemakesFinanceCoLLCMember_019fed4d-3e56-784b-baf9-22587d84f53a_terseLabel_en-US" xlink:label="lab_arcc_DemakesFinanceCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Demakes FinanceCo, LLC</link:label>
    <link:label id="lab_arcc_DemakesFinanceCoLLCMember_label_en-US" xlink:label="lab_arcc_DemakesFinanceCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Demakes FinanceCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_DemakesFinanceCoLLCMember_documentation_en-US" xlink:label="lab_arcc_DemakesFinanceCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Demakes FinanceCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DemakesFinanceCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_DemakesFinanceCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DemakesFinanceCoLLCMember" xlink:to="lab_arcc_DemakesFinanceCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AlignPrecisionGroupLLCAndAlignPrecisionTopcoL.P.Member_019fed4d-3d42-7ecc-8a42-1b3241182e29_terseLabel_en-US" xlink:label="lab_arcc_AlignPrecisionGroupLLCAndAlignPrecisionTopcoL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Align Precision Group, LLC and Align Precision Topco, L.P.</link:label>
    <link:label id="lab_arcc_AlignPrecisionGroupLLCAndAlignPrecisionTopcoL.P.Member_label_en-US" xlink:label="lab_arcc_AlignPrecisionGroupLLCAndAlignPrecisionTopcoL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Align Precision Group, LLC and Align Precision Topco, L.P. [Member]</link:label>
    <link:label id="lab_arcc_AlignPrecisionGroupLLCAndAlignPrecisionTopcoL.P.Member_documentation_en-US" xlink:label="lab_arcc_AlignPrecisionGroupLLCAndAlignPrecisionTopcoL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Align Precision Group, LLC and Align Precision Topco, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AlignPrecisionGroupLLCAndAlignPrecisionTopcoL.P.Member" xlink:href="arcc-20260930.xsd#arcc_AlignPrecisionGroupLLCAndAlignPrecisionTopcoL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AlignPrecisionGroupLLCAndAlignPrecisionTopcoL.P.Member" xlink:to="lab_arcc_AlignPrecisionGroupLLCAndAlignPrecisionTopcoL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProviderOfIntellectualPropertyManagementLifecycleSoftwareMember_01a15d11-2e92-7103-8e43-cf8fa091cd20_terseLabel_en-US" xlink:label="lab_arcc_ProviderOfIntellectualPropertyManagementLifecycleSoftwareMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provider of Intellectual Property Management Lifecycle Software</link:label>
    <link:label id="lab_arcc_ProviderOfIntellectualPropertyManagementLifecycleSoftwareMember_label_en-US" xlink:label="lab_arcc_ProviderOfIntellectualPropertyManagementLifecycleSoftwareMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Provider of Intellectual Property Management Lifecycle Software [Member]</link:label>
    <link:label id="lab_arcc_ProviderOfIntellectualPropertyManagementLifecycleSoftwareMember_documentation_en-US" xlink:label="lab_arcc_ProviderOfIntellectualPropertyManagementLifecycleSoftwareMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Provider of Intellectual Property Management Lifecycle Software</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProviderOfIntellectualPropertyManagementLifecycleSoftwareMember" xlink:href="arcc-20260930.xsd#arcc_ProviderOfIntellectualPropertyManagementLifecycleSoftwareMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProviderOfIntellectualPropertyManagementLifecycleSoftwareMember" xlink:to="lab_arcc_ProviderOfIntellectualPropertyManagementLifecycleSoftwareMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InterestRateSwap3Member_019fed4d-3dd3-7292-8e95-b7e26b34d38b_terseLabel_en-US" xlink:label="lab_arcc_InterestRateSwap3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate swap 3</link:label>
    <link:label id="lab_arcc_InterestRateSwap3Member_label_en-US" xlink:label="lab_arcc_InterestRateSwap3Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 3 [Member]</link:label>
    <link:label id="lab_arcc_InterestRateSwap3Member_documentation_en-US" xlink:label="lab_arcc_InterestRateSwap3Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 3</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestRateSwap3Member" xlink:href="arcc-20260930.xsd#arcc_InterestRateSwap3Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InterestRateSwap3Member" xlink:to="lab_arcc_InterestRateSwap3Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember_019fed4d-3d42-7e65-ae34-df43e12ed80a_terseLabel_en-US" xlink:label="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hills Distribution, Inc., Hills Intermediate FT Holdings, LLC and GMP Hills, LP</link:label>
    <link:label id="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember_label_en-US" xlink:label="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hills Distribution, Inc., Hills Intermediate FT Holdings, LLC and GMP Hills, LP [Member]</link:label>
    <link:label id="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember_documentation_en-US" xlink:label="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Hills Distribution, Inc., Hills Intermediate FT Holdings, LLC and GMP Hills, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember" xlink:href="arcc-20260930.xsd#arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember" xlink:to="lab_arcc_HillsDistributionIncHillsIntermediateFTHoldingsLLCAndGMPHillsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AdjToCompAxis_terseLabel_en-US" xlink:label="lab_ecd_AdjToCompAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation:</link:label>
    <link:label id="lab_ecd_AdjToCompAxis_label_en-US" xlink:label="lab_ecd_AdjToCompAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToCompAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AdjToCompAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AdjToCompAxis" xlink:to="lab_ecd_AdjToCompAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NextGenSecurityLLCAndQueensguardCoinvestorAggregatorLPMember_01a15e7f-3e63-7efa-8e52-14627cc89e39_terseLabel_en-US" xlink:label="lab_arcc_NextGenSecurityLLCAndQueensguardCoinvestorAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NextGen Security, LLC and Queensguard Coinvestor Aggregator LP</link:label>
    <link:label id="lab_arcc_NextGenSecurityLLCAndQueensguardCoinvestorAggregatorLPMember_label_en-US" xlink:label="lab_arcc_NextGenSecurityLLCAndQueensguardCoinvestorAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NextGen Security, LLC and Queensguard Coinvestor Aggregator LP [Member]</link:label>
    <link:label id="lab_arcc_NextGenSecurityLLCAndQueensguardCoinvestorAggregatorLPMember_documentation_en-US" xlink:label="lab_arcc_NextGenSecurityLLCAndQueensguardCoinvestorAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NextGen Security, LLC and Queensguard Coinvestor Aggregator LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NextGenSecurityLLCAndQueensguardCoinvestorAggregatorLPMember" xlink:href="arcc-20260930.xsd#arcc_NextGenSecurityLLCAndQueensguardCoinvestorAggregatorLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NextGenSecurityLLCAndQueensguardCoinvestorAggregatorLPMember" xlink:to="lab_arcc_NextGenSecurityLLCAndQueensguardCoinvestorAggregatorLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsPayableLineItems_019fed4d-3dd3-7d25-b977-ef6bb06578ea_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends Payable [Line Items]</link:label>
    <link:label id="lab_us-gaap_DividendsPayableLineItems_label_en-US" xlink:label="lab_us-gaap_DividendsPayableLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Payable [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsPayableLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPayableLineItems" xlink:to="lab_us-gaap_DividendsPayableLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsPayableTable_019fed4d-3dd3-7bb8-907d-800217f4db3c_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends Payable [Table]</link:label>
    <link:label id="lab_us-gaap_DividendsPayableTable_label_en-US" xlink:label="lab_us-gaap_DividendsPayableTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Payable [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsPayableTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPayableTable" xlink:to="lab_us-gaap_DividendsPayableTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ADLCLO4DebtSecuritizationMember_019fed4d-3d41-7941-b8e9-968e25b20315_terseLabel_en-US" xlink:label="lab_arcc_ADLCLO4DebtSecuritizationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ADL CLO 4 Debt Securitization</link:label>
    <link:label id="lab_arcc_ADLCLO4DebtSecuritizationMember_label_en-US" xlink:label="lab_arcc_ADLCLO4DebtSecuritizationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ADL CLO 4 Debt Securitization [Member]</link:label>
    <link:label id="lab_arcc_ADLCLO4DebtSecuritizationMember_documentation_en-US" xlink:label="lab_arcc_ADLCLO4DebtSecuritizationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ADL CLO 4 Debt Securitization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ADLCLO4DebtSecuritizationMember" xlink:href="arcc-20260930.xsd#arcc_ADLCLO4DebtSecuritizationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ADLCLO4DebtSecuritizationMember" xlink:to="lab_arcc_ADLCLO4DebtSecuritizationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DividendsAndDistributionsTextBlock_019fed4d-3e56-7bb0-ad80-109735790afe_terseLabel_en-US" xlink:label="lab_arcc_DividendsAndDistributionsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DIVIDENDS AND DISTRIBUTIONS</link:label>
    <link:label id="lab_arcc_DividendsAndDistributionsTextBlock_label_en-US" xlink:label="lab_arcc_DividendsAndDistributionsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends And Distributions [Text Block]</link:label>
    <link:label id="lab_arcc_DividendsAndDistributionsTextBlock_documentation_en-US" xlink:label="lab_arcc_DividendsAndDistributionsTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividends And Distributions Text block</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DividendsAndDistributionsTextBlock" xlink:href="arcc-20260930.xsd#arcc_DividendsAndDistributionsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DividendsAndDistributionsTextBlock" xlink:to="lab_arcc_DividendsAndDistributionsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_Rule10b51ArrTrmntdFlag_terseLabel_en-US" xlink:label="lab_ecd_Rule10b51ArrTrmntdFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rule 10b5-1 Arrangement Terminated</link:label>
    <link:label id="lab_ecd_Rule10b51ArrTrmntdFlag_label_en-US" xlink:label="lab_ecd_Rule10b51ArrTrmntdFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rule 10b5-1 Arrangement Terminated [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_Rule10b51ArrTrmntdFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_Rule10b51ArrTrmntdFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_Rule10b51ArrTrmntdFlag" xlink:to="lab_ecd_Rule10b51ArrTrmntdFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AggtErrCompAmt_terseLabel_en-US" xlink:label="lab_ecd_AggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Amount</link:label>
    <link:label id="lab_ecd_AggtErrCompAmt_label_en-US" xlink:label="lab_ecd_AggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtErrCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AggtErrCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AggtErrCompAmt" xlink:to="lab_ecd_AggtErrCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestPaidNet_019fed4d-3e56-7325-84e7-97f54b8d785b_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest paid during the period</link:label>
    <link:label id="lab_us-gaap_InterestPaidNet_019fed4d-3e56-745d-a30a-8beabffcad58_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash paid for interest expense</link:label>
    <link:label id="lab_us-gaap_InterestPaidNet_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Paid, Excluding Capitalized Interest, Operating Activity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPaidNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPaidNet" xlink:to="lab_us-gaap_InterestPaidNet" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract_019fed4d-3d42-7edf-a2e5-b31ec924df50_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ratio/Supplemental Data:</link:label>
    <link:label id="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract_label_en-US" xlink:label="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Ratio/Supplemental Data [Abstract]</link:label>
    <link:label id="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Ratio/Supplemental Data</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyRatioSupplementalDataAbstract" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyRatioSupplementalDataAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyRatioSupplementalDataAbstract" xlink:to="lab_arcc_InvestmentCompanyRatioSupplementalDataAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_HedgingDesignationAxis_019fed4d-3e56-7716-8e8c-bb3a616335c7_terseLabel_en-US" xlink:label="lab_us-gaap_HedgingDesignationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hedging Designation [Axis]</link:label>
    <link:label id="lab_us-gaap_HedgingDesignationAxis_label_en-US" xlink:label="lab_us-gaap_HedgingDesignationAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hedging Designation [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HedgingDesignationAxis" xlink:to="lab_us-gaap_HedgingDesignationAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember_019fed4d-3e56-79c2-8a27-1c67b4f658aa_terseLabel_en-US" xlink:label="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Smarsh Inc. and Skywalker TopCo, LLC</link:label>
    <link:label id="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember_label_en-US" xlink:label="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Smarsh Inc. and Skywalker TopCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember_documentation_en-US" xlink:label="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Smarsh Inc. and Skywalker TopCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_SmarshIncAndSkywalkerTopCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:to="lab_arcc_SmarshIncAndSkywalkerTopCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CreditFacilityAxis_019fed4d-3d42-7aac-8fac-3dc8abe81603_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityAxis_label_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityAxis" xlink:to="lab_us-gaap_CreditFacilityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LJPerimeterBuyerIncAndLJPerimeterCoInvestLPMember_019fed4d-3dd3-7a34-8b8e-308d470bb7a5_terseLabel_en-US" xlink:label="lab_arcc_LJPerimeterBuyerIncAndLJPerimeterCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LJ Perimeter Buyer, Inc. and LJ Perimeter Co-Invest, L.P.</link:label>
    <link:label id="lab_arcc_LJPerimeterBuyerIncAndLJPerimeterCoInvestLPMember_label_en-US" xlink:label="lab_arcc_LJPerimeterBuyerIncAndLJPerimeterCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">LJ Perimeter Buyer, Inc. and LJ Perimeter Co-Invest, L.P. [Member]</link:label>
    <link:label id="lab_arcc_LJPerimeterBuyerIncAndLJPerimeterCoInvestLPMember_documentation_en-US" xlink:label="lab_arcc_LJPerimeterBuyerIncAndLJPerimeterCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">LJ Perimeter Buyer, Inc. and LJ Perimeter Co-Invest, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LJPerimeterBuyerIncAndLJPerimeterCoInvestLPMember" xlink:href="arcc-20260930.xsd#arcc_LJPerimeterBuyerIncAndLJPerimeterCoInvestLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LJPerimeterBuyerIncAndLJPerimeterCoInvestLPMember" xlink:to="lab_arcc_LJPerimeterBuyerIncAndLJPerimeterCoInvestLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_MeasureName_terseLabel_en-US" xlink:label="lab_ecd_MeasureName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
    <link:label id="lab_ecd_MeasureName_label_en-US" xlink:label="lab_ecd_MeasureName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measure Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MeasureName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_MeasureName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_MeasureName" xlink:to="lab_ecd_MeasureName" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PayVsPerformanceDisclosureLineItems_label_en-US" xlink:label="lab_ecd_PayVsPerformanceDisclosureLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pay vs Performance Disclosure [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PayVsPerformanceDisclosureLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="lab_ecd_PayVsPerformanceDisclosureLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019fed4d-3e56-7528-93d2-06f65e44b998_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TheArcticomGroupLLCAndAMCPMechanicalHoldingsLPMember_019fed4d-3d42-7e29-a0ae-45e78185c968_terseLabel_en-US" xlink:label="lab_arcc_TheArcticomGroupLLCAndAMCPMechanicalHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">The Arcticom Group, LLC and AMCP Mechanical Holdings, LP</link:label>
    <link:label id="lab_arcc_TheArcticomGroupLLCAndAMCPMechanicalHoldingsLPMember_label_en-US" xlink:label="lab_arcc_TheArcticomGroupLLCAndAMCPMechanicalHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">The Arcticom Group, LLC and AMCP Mechanical Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_TheArcticomGroupLLCAndAMCPMechanicalHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_TheArcticomGroupLLCAndAMCPMechanicalHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The Arcticom Group, LLC and AMCP Mechanical Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TheArcticomGroupLLCAndAMCPMechanicalHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_TheArcticomGroupLLCAndAMCPMechanicalHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TheArcticomGroupLLCAndAMCPMechanicalHoldingsLPMember" xlink:to="lab_arcc_TheArcticomGroupLLCAndAMCPMechanicalHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IvyHillAssetManagementLPMember_019fed4d-3e56-7b06-801d-8154195b045b_terseLabel_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P.</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPMember_label_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P. [Member]</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPMember_documentation_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IvyHillAssetManagementLPMember" xlink:href="arcc-20260930.xsd#arcc_IvyHillAssetManagementLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IvyHillAssetManagementLPMember" xlink:to="lab_arcc_IvyHillAssetManagementLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SportsMediaAndEntertainmentMember_019fed4d-3dd3-7865-9988-aed5bb7287d6_terseLabel_en-US" xlink:label="lab_arcc_SportsMediaAndEntertainmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sports, Media and Entertainment</link:label>
    <link:label id="lab_arcc_SportsMediaAndEntertainmentMember_label_en-US" xlink:label="lab_arcc_SportsMediaAndEntertainmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sports, Media And Entertainment [Member]</link:label>
    <link:label id="lab_arcc_SportsMediaAndEntertainmentMember_documentation_en-US" xlink:label="lab_arcc_SportsMediaAndEntertainmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sports, Media And Entertainment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SportsMediaAndEntertainmentMember" xlink:href="arcc-20260930.xsd#arcc_SportsMediaAndEntertainmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SportsMediaAndEntertainmentMember" xlink:to="lab_arcc_SportsMediaAndEntertainmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DiligentCorporationAndDiligentPreferredIssuerIncMember_019fed4d-3e56-7ad4-90d4-6355c2c46e9b_terseLabel_en-US" xlink:label="lab_arcc_DiligentCorporationAndDiligentPreferredIssuerIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Diligent Corporation and Diligent Preferred Issuer, Inc.</link:label>
    <link:label id="lab_arcc_DiligentCorporationAndDiligentPreferredIssuerIncMember_label_en-US" xlink:label="lab_arcc_DiligentCorporationAndDiligentPreferredIssuerIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Diligent Corporation and Diligent Preferred Issuer, Inc. [Member]</link:label>
    <link:label id="lab_arcc_DiligentCorporationAndDiligentPreferredIssuerIncMember_documentation_en-US" xlink:label="lab_arcc_DiligentCorporationAndDiligentPreferredIssuerIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Diligent Corporation and Diligent Preferred Issuer, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DiligentCorporationAndDiligentPreferredIssuerIncMember" xlink:href="arcc-20260930.xsd#arcc_DiligentCorporationAndDiligentPreferredIssuerIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DiligentCorporationAndDiligentPreferredIssuerIncMember" xlink:to="lab_arcc_DiligentCorporationAndDiligentPreferredIssuerIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentLineItems_019fed4d-3dd3-70c3-9c4b-2f1c6f40668b_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentLineItems_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentLineItems" xlink:to="lab_us-gaap_DebtInstrumentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember_019fed4d-3dd3-73ff-b4f6-c906be541f70_terseLabel_en-US" xlink:label="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SageSure Holdings, LLC and SageSure LLC</link:label>
    <link:label id="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember_label_en-US" xlink:label="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SageSure Holdings, LLC and SageSure LLC [Member]</link:label>
    <link:label id="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember_documentation_en-US" xlink:label="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SageSure Holdings, LLC and SageSure LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:href="arcc-20260930.xsd#arcc_SageSureHoldingsLLCAndSageSureLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:to="lab_arcc_SageSureHoldingsLLCAndSageSureLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_019fed4d-3d41-7969-b5ce-18d0e49b3bdc_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital in Excess of Par Value</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid-in Capital [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalMember" xlink:to="lab_us-gaap_AdditionalPaidInCapitalMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentFundsAndVehiclesMember_019fed4d-3dd3-757e-aaaa-5c92519a6531_terseLabel_en-US" xlink:label="lab_arcc_InvestmentFundsAndVehiclesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Funds and Vehicles</link:label>
    <link:label id="lab_arcc_InvestmentFundsAndVehiclesMember_label_en-US" xlink:label="lab_arcc_InvestmentFundsAndVehiclesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Funds And Vehicles [Member]</link:label>
    <link:label id="lab_arcc_InvestmentFundsAndVehiclesMember_documentation_en-US" xlink:label="lab_arcc_InvestmentFundsAndVehiclesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Funds And Vehicles</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentFundsAndVehiclesMember" xlink:href="arcc-20260930.xsd#arcc_InvestmentFundsAndVehiclesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentFundsAndVehiclesMember" xlink:to="lab_arcc_InvestmentFundsAndVehiclesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyCommittedCapital_019fed4d-3d42-720e-8090-7e56f8bf3443_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyCommittedCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitment to fund</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyCommittedCapital_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyCommittedCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Committed Capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyCommittedCapital" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyCommittedCapital"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyCommittedCapital" xlink:to="lab_us-gaap_InvestmentCompanyCommittedCapital" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InsuranceSectorMember_019fed4d-3e56-7c3b-a591-1550d3689c07_terseLabel_en-US" xlink:label="lab_us-gaap_InsuranceSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Insurance</link:label>
    <link:label id="lab_us-gaap_InsuranceSectorMember_label_en-US" xlink:label="lab_us-gaap_InsuranceSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insurance Sector [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceSectorMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InsuranceSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InsuranceSectorMember" xlink:to="lab_us-gaap_InsuranceSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsPaidinkind_019fed4d-3e56-7946-b37d-2908de339ef6_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPaidinkind" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collections of PIK dividends</link:label>
    <link:label id="lab_us-gaap_DividendsPaidinkind_label_en-US" xlink:label="lab_us-gaap_DividendsPaidinkind" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends, Paid-in-kind</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPaidinkind" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsPaidinkind"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPaidinkind" xlink:to="lab_us-gaap_DividendsPaidinkind" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HeavyConstructionSystemsSpecialistsLLCMember_019fed4d-3d42-7809-9f56-5816b02f61d7_terseLabel_en-US" xlink:label="lab_arcc_HeavyConstructionSystemsSpecialistsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Heavy Construction Systems Specialists, LLC</link:label>
    <link:label id="lab_arcc_HeavyConstructionSystemsSpecialistsLLCMember_label_en-US" xlink:label="lab_arcc_HeavyConstructionSystemsSpecialistsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Heavy Construction Systems Specialists, LLC [Member]</link:label>
    <link:label id="lab_arcc_HeavyConstructionSystemsSpecialistsLLCMember_documentation_en-US" xlink:label="lab_arcc_HeavyConstructionSystemsSpecialistsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Heavy Construction Systems Specialists, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HeavyConstructionSystemsSpecialistsLLCMember" xlink:href="arcc-20260930.xsd#arcc_HeavyConstructionSystemsSpecialistsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HeavyConstructionSystemsSpecialistsLLCMember" xlink:to="lab_arcc_HeavyConstructionSystemsSpecialistsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_UFSLLCAndBVUFSAggregatorLLCMember_019fed4d-3e56-795a-9e4a-b9ca710b0fb7_terseLabel_en-US" xlink:label="lab_arcc_UFSLLCAndBVUFSAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">UFS, LLC and BV-UFS Aggregator, LLC</link:label>
    <link:label id="lab_arcc_UFSLLCAndBVUFSAggregatorLLCMember_label_en-US" xlink:label="lab_arcc_UFSLLCAndBVUFSAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">UFS, LLC and BV-UFS Aggregator, LLC [Member]</link:label>
    <link:label id="lab_arcc_UFSLLCAndBVUFSAggregatorLLCMember_documentation_en-US" xlink:label="lab_arcc_UFSLLCAndBVUFSAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">UFS, LLC and BV-UFS Aggregator, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_UFSLLCAndBVUFSAggregatorLLCMember" xlink:href="arcc-20260930.xsd#arcc_UFSLLCAndBVUFSAggregatorLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_UFSLLCAndBVUFSAggregatorLLCMember" xlink:to="lab_arcc_UFSLLCAndBVUFSAggregatorLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestReceivable_019fed4d-3dd3-749c-8863-81117c837dd3_terseLabel_en-US" xlink:label="lab_us-gaap_InterestReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest receivable</link:label>
    <link:label id="lab_us-gaap_InterestReceivable_label_en-US" xlink:label="lab_us-gaap_InterestReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestReceivable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestReceivable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestReceivable" xlink:to="lab_us-gaap_InterestReceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrIndName_terseLabel_en-US" xlink:label="lab_ecd_TrdArrIndName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
    <link:label id="lab_ecd_TrdArrIndName_label_en-US" xlink:label="lab_ecd_TrdArrIndName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement, Individual Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrIndName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrIndName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrIndName" xlink:to="lab_ecd_TrdArrIndName" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_019fed4d-3dd3-7f76-bdc8-b3a58b1435bc_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_019fed4d-3dd3-7d10-ab9a-3852b1a02281_verboseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IHElevateBuyerInc.AndIntegrumElevateCoInvestLPMember_019fed4d-3e56-7cb7-9a55-9342037a1e96_terseLabel_en-US" xlink:label="lab_arcc_IHElevateBuyerInc.AndIntegrumElevateCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">IH Elevate Buyer, Inc. and Integrum Elevate Co-Invest LP</link:label>
    <link:label id="lab_arcc_IHElevateBuyerInc.AndIntegrumElevateCoInvestLPMember_label_en-US" xlink:label="lab_arcc_IHElevateBuyerInc.AndIntegrumElevateCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IH Elevate Buyer, Inc. and Integrum Elevate Co-Invest LP [Member]</link:label>
    <link:label id="lab_arcc_IHElevateBuyerInc.AndIntegrumElevateCoInvestLPMember_documentation_en-US" xlink:label="lab_arcc_IHElevateBuyerInc.AndIntegrumElevateCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">IH Elevate Buyer, Inc. and Integrum Elevate Co-Invest LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IHElevateBuyerInc.AndIntegrumElevateCoInvestLPMember" xlink:href="arcc-20260930.xsd#arcc_IHElevateBuyerInc.AndIntegrumElevateCoInvestLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IHElevateBuyerInc.AndIntegrumElevateCoInvestLPMember" xlink:to="lab_arcc_IHElevateBuyerInc.AndIntegrumElevateCoInvestLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyNumberOfBorrowers_019fed4d-3d42-7ea8-863b-13a00ffc08b3_verboseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyNumberOfBorrowers" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of borrowers</link:label>
    <link:label id="lab_arcc_InvestmentCompanyNumberOfBorrowers_019fed4d-3d42-7617-b521-729e1fb75d68_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyNumberOfBorrowers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of borrowers in the SDLP</link:label>
    <link:label id="lab_arcc_InvestmentCompanyNumberOfBorrowers_label_en-US" xlink:label="lab_arcc_InvestmentCompanyNumberOfBorrowers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Number of Borrowers</link:label>
    <link:label id="lab_arcc_InvestmentCompanyNumberOfBorrowers_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyNumberOfBorrowers" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Number of Borrowers</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyNumberOfBorrowers" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyNumberOfBorrowers"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyNumberOfBorrowers" xlink:to="lab_arcc_InvestmentCompanyNumberOfBorrowers" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConsumerDistributionAndRetailMember_019fed4d-3e56-721c-aaf6-ff18fd9b44ee_terseLabel_en-US" xlink:label="lab_arcc_ConsumerDistributionAndRetailMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consumer Distribution and Retail</link:label>
    <link:label id="lab_arcc_ConsumerDistributionAndRetailMember_label_en-US" xlink:label="lab_arcc_ConsumerDistributionAndRetailMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consumer Distribution And Retail [Member]</link:label>
    <link:label id="lab_arcc_ConsumerDistributionAndRetailMember_documentation_en-US" xlink:label="lab_arcc_ConsumerDistributionAndRetailMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Consumer Distribution And Retail</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConsumerDistributionAndRetailMember" xlink:href="arcc-20260930.xsd#arcc_ConsumerDistributionAndRetailMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ConsumerDistributionAndRetailMember" xlink:to="lab_arcc_ConsumerDistributionAndRetailMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_CoSelectedMeasureAmt_terseLabel_en-US" xlink:label="lab_ecd_CoSelectedMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Company Selected Measure Amount</link:label>
    <link:label id="lab_ecd_CoSelectedMeasureAmt_label_en-US" xlink:label="lab_ecd_CoSelectedMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Company Selected Measure Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CoSelectedMeasureAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_CoSelectedMeasureAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CoSelectedMeasureAmt" xlink:to="lab_ecd_CoSelectedMeasureAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HouseholdAndPersonalProductsMember_019fed4d-3d41-76f1-a580-746c1e520bbc_terseLabel_en-US" xlink:label="lab_arcc_HouseholdAndPersonalProductsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Household and Personal Products</link:label>
    <link:label id="lab_arcc_HouseholdAndPersonalProductsMember_label_en-US" xlink:label="lab_arcc_HouseholdAndPersonalProductsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Household And Personal Products [Member]</link:label>
    <link:label id="lab_arcc_HouseholdAndPersonalProductsMember_documentation_en-US" xlink:label="lab_arcc_HouseholdAndPersonalProductsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Household And Personal Products</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HouseholdAndPersonalProductsMember" xlink:href="arcc-20260930.xsd#arcc_HouseholdAndPersonalProductsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HouseholdAndPersonalProductsMember" xlink:to="lab_arcc_HouseholdAndPersonalProductsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember_019fed4d-3e56-7233-baff-485345883f70_terseLabel_en-US" xlink:label="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Convera International Holdings Limited and Convera International Financial S.A R.L.</link:label>
    <link:label id="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember_label_en-US" xlink:label="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Convera International Holdings Limited and Convera International Financial S.A R.L. [Member]</link:label>
    <link:label id="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember_documentation_en-US" xlink:label="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Convera International Holdings Limited and Convera International Financial S.A R.L.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:href="arcc-20260930.xsd#arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:to="lab_arcc_ConveraInternationalHoldingsLimitedAndConveraInternationalFinancialSARLMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CreationTechnologiesInc.AndCreationTechnologiesInternationalInc.Member_01a15e2c-6ec9-744f-b0c0-d26383f2561d_terseLabel_en-US" xlink:label="lab_arcc_CreationTechnologiesInc.AndCreationTechnologiesInternationalInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Creation Technologies, Inc. and Creation Technologies International Inc.</link:label>
    <link:label id="lab_arcc_CreationTechnologiesInc.AndCreationTechnologiesInternationalInc.Member_label_en-US" xlink:label="lab_arcc_CreationTechnologiesInc.AndCreationTechnologiesInternationalInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Creation Technologies, Inc. and Creation Technologies International Inc. [Member]</link:label>
    <link:label id="lab_arcc_CreationTechnologiesInc.AndCreationTechnologiesInternationalInc.Member_documentation_en-US" xlink:label="lab_arcc_CreationTechnologiesInc.AndCreationTechnologiesInternationalInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Creation Technologies, Inc. and Creation Technologies International Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CreationTechnologiesInc.AndCreationTechnologiesInternationalInc.Member" xlink:href="arcc-20260930.xsd#arcc_CreationTechnologiesInc.AndCreationTechnologiesInternationalInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CreationTechnologiesInc.AndCreationTechnologiesInternationalInc.Member" xlink:to="lab_arcc_CreationTechnologiesInc.AndCreationTechnologiesInternationalInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember_019fed4d-3d42-7f20-bd71-d5cbfbf81b96_terseLabel_en-US" xlink:label="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Global Medical Response, Inc. and GMR Buyer Corp.</link:label>
    <link:label id="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember_label_en-US" xlink:label="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Global Medical Response, Inc. and GMR Buyer Corp. [Member]</link:label>
    <link:label id="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember_documentation_en-US" xlink:label="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Global Medical Response, Inc. and GMR Buyer Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember" xlink:href="arcc-20260930.xsd#arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember" xlink:to="lab_arcc_GlobalMedicalResponseIncAndGMRBuyerCorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember_019fed4d-3d42-7cd1-8146-080fc3c9e18d_terseLabel_en-US" xlink:label="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Taymax Group, L.P., Taymax Group G.P., LLC, PF Salem Canada ULC and TCP Fit Parent, L.P.</link:label>
    <link:label id="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember_label_en-US" xlink:label="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Taymax Group, L.P., Taymax Group G.P., LLC, PF Salem Canada ULC and TCP Fit Parent, L.P. [Member]</link:label>
    <link:label id="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember_documentation_en-US" xlink:label="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Taymax Group, L.P., Taymax Group G.P., LLC, PF Salem Canada ULC and TCP Fit Parent, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:href="arcc-20260930.xsd#arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:to="lab_arcc_TaymaxGroupLPTaymaxGroupGPLLCPFSalemCanadaULCAndTCPFitParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MaterialsSectorMember_019fed4d-3d42-770d-81cf-c5f6451b1cdd_terseLabel_en-US" xlink:label="lab_arcc_MaterialsSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Materials</link:label>
    <link:label id="lab_arcc_MaterialsSectorMember_label_en-US" xlink:label="lab_arcc_MaterialsSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Materials Sector [Member]</link:label>
    <link:label id="lab_arcc_MaterialsSectorMember_documentation_en-US" xlink:label="lab_arcc_MaterialsSectorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Materials Sector</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MaterialsSectorMember" xlink:href="arcc-20260930.xsd#arcc_MaterialsSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MaterialsSectorMember" xlink:to="lab_arcc_MaterialsSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConsumerServicesMember_019fed4d-3d41-7dce-99c7-49de68ebe8e3_terseLabel_en-US" xlink:label="lab_arcc_ConsumerServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consumer Services</link:label>
    <link:label id="lab_arcc_ConsumerServicesMember_label_en-US" xlink:label="lab_arcc_ConsumerServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consumer Services [Member]</link:label>
    <link:label id="lab_arcc_ConsumerServicesMember_documentation_en-US" xlink:label="lab_arcc_ConsumerServicesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Consumer Services</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConsumerServicesMember" xlink:href="arcc-20260930.xsd#arcc_ConsumerServicesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ConsumerServicesMember" xlink:to="lab_arcc_ConsumerServicesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member_019fed4d-3d41-77c0-a66d-4abf11008aa7_terseLabel_en-US" xlink:label="lab_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Victors Purchaser, LLC and WP Victors Co-Investment, L.P.</link:label>
    <link:label id="lab_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member_label_en-US" xlink:label="lab_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Victors Purchaser, LLC and WP Victors Co-Investment, L.P. [Member]</link:label>
    <link:label id="lab_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member_documentation_en-US" xlink:label="lab_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Victors Purchaser, LLC and WP Victors Co-Investment, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member" xlink:href="arcc-20260930.xsd#arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member" xlink:to="lab_arcc_VictorsPurchaserLLCAndWPVictorsCoInvestmentL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonPeoNeoMember_terseLabel_en-US" xlink:label="lab_ecd_NonPeoNeoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-PEO NEO</link:label>
    <link:label id="lab_ecd_NonPeoNeoMember_label_en-US" xlink:label="lab_ecd_NonPeoNeoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-PEO NEO [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonPeoNeoMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonPeoNeoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonPeoNeoMember" xlink:to="lab_ecd_NonPeoNeoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsidiarySaleOfStockLineItems_019fed4d-3e56-76ec-a86a-8cf4b1adb02b_terseLabel_en-US" xlink:label="lab_us-gaap_SubsidiarySaleOfStockLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsidiary, Sale of Stock [Line Items]</link:label>
    <link:label id="lab_us-gaap_SubsidiarySaleOfStockLineItems_label_en-US" xlink:label="lab_us-gaap_SubsidiarySaleOfStockLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsidiary, Sale of Stock [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsidiarySaleOfStockLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsidiarySaleOfStockLineItems" xlink:to="lab_us-gaap_SubsidiarySaleOfStockLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit_019fed4d-3e56-7943-8cd0-a9c75167c79a_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income tax expense, including excise taxes</link:label>
    <link:label id="lab_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit_label_en-US" xlink:label="lab_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Income, Operating, Tax Expense (Benefit)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:to="lab_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_UserZoomTechnologiesInc.Member_019fed4d-3e56-78c5-9c31-18a8b78977f2_terseLabel_en-US" xlink:label="lab_arcc_UserZoomTechnologiesInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">UserZoom Technologies, Inc.</link:label>
    <link:label id="lab_arcc_UserZoomTechnologiesInc.Member_label_en-US" xlink:label="lab_arcc_UserZoomTechnologiesInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">UserZoom Technologies, Inc. [Member]</link:label>
    <link:label id="lab_arcc_UserZoomTechnologiesInc.Member_documentation_en-US" xlink:label="lab_arcc_UserZoomTechnologiesInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">UserZoom Technologies, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_UserZoomTechnologiesInc.Member" xlink:href="arcc-20260930.xsd#arcc_UserZoomTechnologiesInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_UserZoomTechnologiesInc.Member" xlink:to="lab_arcc_UserZoomTechnologiesInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CustomerConcentrationRiskMember_019fed4d-3d42-751a-af4a-217882d2e9ea_terseLabel_en-US" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer Concentration Risk</link:label>
    <link:label id="lab_us-gaap_CustomerConcentrationRiskMember_label_en-US" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer Concentration Risk [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CustomerConcentrationRiskMember" xlink:to="lab_us-gaap_CustomerConcentrationRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgMethodTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgMethodTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing Method</link:label>
    <link:label id="lab_ecd_AwardTmgMethodTextBlock_label_en-US" xlink:label="lab_ecd_AwardTmgMethodTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing Method [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMethodTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgMethodTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgMethodTextBlock" xlink:to="lab_ecd_AwardTmgMethodTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019fed4d-3d42-763c-8219-9cfb579136b4_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplier_01a17ad2-9252-750d-abe1-4509c7b08f61_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplier" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Closing price, Dividend Adjusted Price, multiplier</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplier_label_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplier" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Dividend Adjusted Price, Multiplier</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplier_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplier" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Dividend Adjusted Price, Multiplier</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplier" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplier"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplier" xlink:to="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplier" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock_terseLabel_en-US" xlink:label="lab_ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forgone Recovery, Explanation of Impracticability</link:label>
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    <link:label id="lab_arcc_TransitTechnologiesLLCMember_019fed4d-3d42-7e67-bed4-33d9b62571a8_terseLabel_en-US" xlink:label="lab_arcc_TransitTechnologiesLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transit Technologies LLC</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease_019fed4d-3dd3-79c0-8f7e-7328a61f7f5b_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyTaxReclassificationIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax reclassification of stockholders&#8217; equity in accordance with GAAP</link:label>
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    <link:label id="lab_us-gaap_MembersCapital_label_en-US" xlink:label="lab_us-gaap_MembersCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Members' Capital</link:label>
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    <link:label id="lab_us-gaap_DerivativeLiabilityNotionalAmount_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilityNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Notional Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityNotionalAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityNotionalAmount"/>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_November2031NotesMember" xlink:href="arcc-20260930.xsd#arcc_November2031NotesMember"/>
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    <link:label id="lab_arcc_January2038ClassA2CLONotesMember_019fed4d-3e56-7348-80c1-2bcb11f2cfa1_terseLabel_en-US" xlink:label="lab_arcc_January2038ClassA2CLONotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">January 2038 Class A-2 CLO Notes</link:label>
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    <link:label id="lab_arcc_ParisUSHoldcoInc.AndTrimasterManufacturingInc.Member_019fed4d-3e56-753c-a93b-aae00b45750c_terseLabel_en-US" xlink:label="lab_arcc_ParisUSHoldcoInc.AndTrimasterManufacturingInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Paris US Holdco, Inc. and Trimaster Manufacturing Inc.</link:label>
    <link:label id="lab_arcc_ParisUSHoldcoInc.AndTrimasterManufacturingInc.Member_label_en-US" xlink:label="lab_arcc_ParisUSHoldcoInc.AndTrimasterManufacturingInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Paris US Holdco, Inc. and Trimaster Manufacturing Inc. [Member]</link:label>
    <link:label id="lab_arcc_ParisUSHoldcoInc.AndTrimasterManufacturingInc.Member_documentation_en-US" xlink:label="lab_arcc_ParisUSHoldcoInc.AndTrimasterManufacturingInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Paris US Holdco, Inc. and Trimaster Manufacturing Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ParisUSHoldcoInc.AndTrimasterManufacturingInc.Member" xlink:href="arcc-20260930.xsd#arcc_ParisUSHoldcoInc.AndTrimasterManufacturingInc.Member"/>
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    <link:label id="lab_arcc_PinnacleMEPIntermediateHoldcoLLCAndBPCPPinnacleHoldingsInc.Member_019fed4d-3dd3-7ff5-9ac5-ac5f3af664d7_terseLabel_en-US" xlink:label="lab_arcc_PinnacleMEPIntermediateHoldcoLLCAndBPCPPinnacleHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pinnacle MEP Intermediate Holdco LLC and BPCP Pinnacle Holdings, Inc.</link:label>
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    <link:label id="lab_arcc_PinnacleMEPIntermediateHoldcoLLCAndBPCPPinnacleHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_PinnacleMEPIntermediateHoldcoLLCAndBPCPPinnacleHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pinnacle MEP Intermediate Holdco LLC and BPCP Pinnacle Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PinnacleMEPIntermediateHoldcoLLCAndBPCPPinnacleHoldingsInc.Member" xlink:href="arcc-20260930.xsd#arcc_PinnacleMEPIntermediateHoldcoLLCAndBPCPPinnacleHoldingsInc.Member"/>
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    <link:label id="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember_019fed4d-3e55-7a07-98df-1523af5c83fb_terseLabel_en-US" xlink:label="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Drogon Bidco Inc. &amp; Drogon Aggregator LP</link:label>
    <link:label id="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember_label_en-US" xlink:label="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Drogon Bidco Inc. &amp; Drogon Aggregator LP [Member]</link:label>
    <link:label id="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember_documentation_en-US" xlink:label="lab_arcc_DrogonBidcoInc.DrogonAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Drogon Bidco Inc. &amp; Drogon Aggregator LP</link:label>
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    <link:label id="lab_ecd_RestatementDateAxis_terseLabel_en-US" xlink:label="lab_ecd_RestatementDateAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restatement Determination Date:</link:label>
    <link:label id="lab_ecd_RestatementDateAxis_label_en-US" xlink:label="lab_ecd_RestatementDateAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement Determination Date [Axis]</link:label>
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    <link:label id="lab_arcc_September2030NotesMember_019fed4d-3e56-7e6d-aaef-f7cb46455af9_terseLabel_en-US" xlink:label="lab_arcc_September2030NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">September 2030 Notes</link:label>
    <link:label id="lab_arcc_September2030NotesMember_019fed4d-3e56-74a0-9ffc-d57fad7a0416_verboseLabel_en-US" xlink:label="lab_arcc_September2030NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">September 2030 Notes (principal amount outstanding of $750)</link:label>
    <link:label id="lab_arcc_September2030NotesMember_label_en-US" xlink:label="lab_arcc_September2030NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">September 2030 Notes [Member]</link:label>
    <link:label id="lab_arcc_September2030NotesMember_documentation_en-US" xlink:label="lab_arcc_September2030NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">September 2030 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_September2030NotesMember" xlink:href="arcc-20260930.xsd#arcc_September2030NotesMember"/>
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    <link:label id="lab_arcc_InterestRateSwap1Member_documentation_en-US" xlink:label="lab_arcc_InterestRateSwap1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestRateSwap1Member" xlink:href="arcc-20260930.xsd#arcc_InterestRateSwap1Member"/>
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    <link:label id="lab_us-gaap_SoutheastRegionMember_019fed4d-3e56-7406-acd5-147c86070b90_terseLabel_en-US" xlink:label="lab_us-gaap_SoutheastRegionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Southeast</link:label>
    <link:label id="lab_us-gaap_SoutheastRegionMember_label_en-US" xlink:label="lab_us-gaap_SoutheastRegionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Southeast Region [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoutheastRegionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SoutheastRegionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SoutheastRegionMember" xlink:to="lab_us-gaap_SoutheastRegionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BGIFIVFearlessUtilityServicesInc.Member_019fed4d-3dd3-7a18-b285-d237fb092ecf_terseLabel_en-US" xlink:label="lab_arcc_BGIFIVFearlessUtilityServicesInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BGIF IV Fearless Utility Services, Inc.</link:label>
    <link:label id="lab_arcc_BGIFIVFearlessUtilityServicesInc.Member_label_en-US" xlink:label="lab_arcc_BGIFIVFearlessUtilityServicesInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BGIF IV Fearless Utility Services, Inc. [Member]</link:label>
    <link:label id="lab_arcc_BGIFIVFearlessUtilityServicesInc.Member_documentation_en-US" xlink:label="lab_arcc_BGIFIVFearlessUtilityServicesInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BGIF IV Fearless Utility Services, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BGIFIVFearlessUtilityServicesInc.Member" xlink:href="arcc-20260930.xsd#arcc_BGIFIVFearlessUtilityServicesInc.Member"/>
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    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
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    <link:label id="lab_arcc_SportMaskaIncMember_019fed4d-3dd3-7545-9a83-e4d1181987bf_terseLabel_en-US" xlink:label="lab_arcc_SportMaskaIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sport Maska Inc</link:label>
    <link:label id="lab_arcc_SportMaskaIncMember_label_en-US" xlink:label="lab_arcc_SportMaskaIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sport Maska Inc [Member]</link:label>
    <link:label id="lab_arcc_SportMaskaIncMember_documentation_en-US" xlink:label="lab_arcc_SportMaskaIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sport Maska Inc</link:label>
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    <link:label id="lab_us-gaap_RevenuesAbstract_019fed4d-3e56-72d2-b870-01caea102e9b_terseLabel_en-US" xlink:label="lab_us-gaap_RevenuesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenues</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenuesAbstract" xlink:to="lab_us-gaap_RevenuesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember_019fed4d-3d42-728f-a44b-97148b24b16f_terseLabel_en-US" xlink:label="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LBC Woodlands Purchaser LLC and LBC Woodlands Holdings LP</link:label>
    <link:label id="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember_label_en-US" xlink:label="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">LBC Woodlands Purchaser LLC and LBC Woodlands Holdings LP [Member]</link:label>
    <link:label id="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">LBC Woodlands Purchaser LLC and LBC Woodlands Holdings LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_LBCWoodlandsPurchaserLLCAndLBCWoodlandsHoldingsLPMember"/>
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    <link:label id="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesMember_019fed4d-3dd3-77d8-9316-44e05d359f5a_terseLabel_en-US" xlink:label="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income based fee and capital gains incentive fee</link:label>
    <link:label id="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesMember_label_en-US" xlink:label="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Based Fees And Capital Gains Incentive Fees [Member]</link:label>
    <link:label id="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesMember_documentation_en-US" xlink:label="lab_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Income Based Fees And Capital Gains Incentive Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesMember" xlink:href="arcc-20260930.xsd#arcc_IncomeBasedFeesAndCapitalGainsIncentiveFeesMember"/>
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    <link:label id="lab_arcc_BernerFoodBeverageLLCMember_019fed4d-3dd3-7d13-a5e4-5742295fc859_terseLabel_en-US" xlink:label="lab_arcc_BernerFoodBeverageLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Berner Food &amp; Beverage, LLC</link:label>
    <link:label id="lab_arcc_BernerFoodBeverageLLCMember_label_en-US" xlink:label="lab_arcc_BernerFoodBeverageLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Berner Food &amp; Beverage, LLC [Member]</link:label>
    <link:label id="lab_arcc_BernerFoodBeverageLLCMember_documentation_en-US" xlink:label="lab_arcc_BernerFoodBeverageLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Berner Food &amp; Beverage, LLC</link:label>
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    <link:label id="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityDomain_label_en-US" xlink:label="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Support to Nonconsolidated Legal Entity [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialSupportToNonconsolidatedLegalEntityDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialSupportToNonconsolidatedLegalEntityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialSupportToNonconsolidatedLegalEntityDomain" xlink:to="lab_us-gaap_FinancialSupportToNonconsolidatedLegalEntityDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedAvailableCapital_019fed4d-3dd3-72bd-887f-ea6b5c8577df_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedAvailableCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital available to the SDLP</link:label>
    <link:label id="lab_arcc_InvestmentOwnedAvailableCapital_label_en-US" xlink:label="lab_arcc_InvestmentOwnedAvailableCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Available Capital</link:label>
    <link:label id="lab_arcc_InvestmentOwnedAvailableCapital_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedAvailableCapital" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Available Capital</link:label>
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    <link:label id="lab_arcc_TwoSixLabsLLCMember_019fed4d-3d42-70b4-a6d3-ce8cb018e8bd_terseLabel_en-US" xlink:label="lab_arcc_TwoSixLabsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Two Six Labs, LLC</link:label>
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    <link:label id="lab_arcc_TwoSixLabsLLCMember_documentation_en-US" xlink:label="lab_arcc_TwoSixLabsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two Six Labs, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TwoSixLabsLLCMember" xlink:href="arcc-20260930.xsd#arcc_TwoSixLabsLLCMember"/>
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    <link:label id="lab_arcc_CoreLogicIncAndTVIIICelestialCoInvestLPMember_019fed4d-3e56-7cc2-9bfb-be01530a5dce_terseLabel_en-US" xlink:label="lab_arcc_CoreLogicIncAndTVIIICelestialCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CoreLogic, Inc. and T-VIII Celestial Co-Invest LP</link:label>
    <link:label id="lab_arcc_CoreLogicIncAndTVIIICelestialCoInvestLPMember_label_en-US" xlink:label="lab_arcc_CoreLogicIncAndTVIIICelestialCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">CoreLogic, Inc. and T-VIII Celestial Co-Invest LP [Member]</link:label>
    <link:label id="lab_arcc_CoreLogicIncAndTVIIICelestialCoInvestLPMember_documentation_en-US" xlink:label="lab_arcc_CoreLogicIncAndTVIIICelestialCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">CoreLogic, Inc. and T-VIII Celestial Co-Invest LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CoreLogicIncAndTVIIICelestialCoInvestLPMember" xlink:href="arcc-20260930.xsd#arcc_CoreLogicIncAndTVIIICelestialCoInvestLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CoreLogicIncAndTVIIICelestialCoInvestLPMember" xlink:to="lab_arcc_CoreLogicIncAndTVIIICelestialCoInvestLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_RangeMember_019fed4d-3d42-750d-9e4b-a93e2b201789_terseLabel_en-US" xlink:label="lab_srt_RangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Domain]</link:label>
    <link:label id="lab_srt_RangeMember_label_en-US" xlink:label="lab_srt_RangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeMember" xlink:to="lab_srt_RangeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember_019fed4d-3dd3-706d-8802-0d36f6f9f32b_terseLabel_en-US" xlink:label="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Activate Holdings (US) Corp. and CrossPoint Capital AS SPV, LP</link:label>
    <link:label id="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember_label_en-US" xlink:label="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Activate Holdings (US) Corp. and CrossPoint Capital AS SPV, LP [Member]</link:label>
    <link:label id="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember_documentation_en-US" xlink:label="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Activate Holdings (US) Corp. and CrossPoint Capital AS SPV, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember" xlink:href="arcc-20260930.xsd#arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember" xlink:to="lab_arcc_ActivateHoldingsUSCorp.AndCrossPointCapitalASSPVLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember_019fed4d-3e56-7215-b834-bd68efb79f73_terseLabel_en-US" xlink:label="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vertex Service Partners, LLC and Vertex Service Partners Holdings, LLC</link:label>
    <link:label id="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vertex Service Partners, LLC and Vertex Service Partners Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Vertex Service Partners, LLC and Vertex Service Partners Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:to="lab_arcc_VertexServicePartnersLLCAndVertexServicePartnersHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentFiscalYearFocus_019fed4d-3d42-72b0-bd75-d667f573bafd_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalYearFocus_label_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalYearFocus" xlink:to="lab_dei_DocumentFiscalYearFocus" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SMBCFundingFacilityMember_019fed4d-3dd3-791f-a22a-40c1bb7b8a01_terseLabel_en-US" xlink:label="lab_arcc_SMBCFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SMBC Funding Facility</link:label>
    <link:label id="lab_arcc_SMBCFundingFacilityMember_label_en-US" xlink:label="lab_arcc_SMBCFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SMBC Funding Facility [Member]</link:label>
    <link:label id="lab_arcc_SMBCFundingFacilityMember_documentation_en-US" xlink:label="lab_arcc_SMBCFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SMBC Funding Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SMBCFundingFacilityMember" xlink:href="arcc-20260930.xsd#arcc_SMBCFundingFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SMBCFundingFacilityMember" xlink:to="lab_arcc_SMBCFundingFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HigginbothamInsuranceAgencyInc.HIGOperationsHoldingsInc.AndHIGIntermediateInc.Member_019fed4d-3dd3-769f-b2e3-883e98fea5b9_terseLabel_en-US" xlink:label="lab_arcc_HigginbothamInsuranceAgencyInc.HIGOperationsHoldingsInc.AndHIGIntermediateInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Higginbotham Insurance Agency, Inc., HIG Operations Holdings, Inc., And HIG Intermediate, Inc.</link:label>
    <link:label id="lab_arcc_HigginbothamInsuranceAgencyInc.HIGOperationsHoldingsInc.AndHIGIntermediateInc.Member_label_en-US" xlink:label="lab_arcc_HigginbothamInsuranceAgencyInc.HIGOperationsHoldingsInc.AndHIGIntermediateInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Higginbotham Insurance Agency, Inc., HIG Operations Holdings, Inc., And HIG Intermediate, Inc. [Member]</link:label>
    <link:label id="lab_arcc_HigginbothamInsuranceAgencyInc.HIGOperationsHoldingsInc.AndHIGIntermediateInc.Member_documentation_en-US" xlink:label="lab_arcc_HigginbothamInsuranceAgencyInc.HIGOperationsHoldingsInc.AndHIGIntermediateInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Higginbotham Insurance Agency, Inc., HIG Operations Holdings, Inc., And HIG Intermediate, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HigginbothamInsuranceAgencyInc.HIGOperationsHoldingsInc.AndHIGIntermediateInc.Member" xlink:href="arcc-20260930.xsd#arcc_HigginbothamInsuranceAgencyInc.HIGOperationsHoldingsInc.AndHIGIntermediateInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HigginbothamInsuranceAgencyInc.HIGOperationsHoldingsInc.AndHIGIntermediateInc.Member" xlink:to="lab_arcc_HigginbothamInsuranceAgencyInc.HIGOperationsHoldingsInc.AndHIGIntermediateInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember_019fed4d-3dd3-78b6-b19c-4201b7273357_terseLabel_en-US" xlink:label="lab_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SOC Telemed, Inc. and PSC Spark Holdings, LP</link:label>
    <link:label id="lab_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember_label_en-US" xlink:label="lab_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SOC Telemed, Inc. and PSC Spark Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SOC Telemed, Inc. and PSC Spark Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember" xlink:to="lab_arcc_SOCTelemedIncAndPSCSparkHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OwnershipPercentage_019fed4d-3e56-77bb-9fc0-df2d22f32ff0_terseLabel_en-US" xlink:label="lab_arcc_OwnershipPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ownership percentage of outstanding SDLP Certificates</link:label>
    <link:label id="lab_arcc_OwnershipPercentage_label_en-US" xlink:label="lab_arcc_OwnershipPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ownership Percentage</link:label>
    <link:label id="lab_arcc_OwnershipPercentage_documentation_en-US" xlink:label="lab_arcc_OwnershipPercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ownership Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OwnershipPercentage" xlink:href="arcc-20260930.xsd#arcc_OwnershipPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OwnershipPercentage" xlink:to="lab_arcc_OwnershipPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IFHFranchiseeHoldingsLLCMember_019fed4d-3dd3-7aa0-b635-ba510498f076_terseLabel_en-US" xlink:label="lab_arcc_IFHFranchiseeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">IFH Franchisee Holdings, LLC</link:label>
    <link:label id="lab_arcc_IFHFranchiseeHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_IFHFranchiseeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IFH Franchisee Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_IFHFranchiseeHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_IFHFranchiseeHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">IFH Franchisee Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IFHFranchiseeHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_IFHFranchiseeHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IFHFranchiseeHoldingsLLCMember" xlink:to="lab_arcc_IFHFranchiseeHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockValue_019fed4d-3dd3-7302-88ee-4e8f66bb64d4_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, par value $0.001 per share, 1,000 common shares authorized; 722 and 718 common shares issued and outstanding, respectively</link:label>
    <link:label id="lab_us-gaap_CommonStockValue_label_en-US" xlink:label="lab_us-gaap_CommonStockValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Value, Issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockValue" xlink:to="lab_us-gaap_CommonStockValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestExpense_019fed4d-3dd3-7763-8a83-8ab4442d661e_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest and credit facility fees</link:label>
    <link:label id="lab_us-gaap_InterestExpense_019fed4d-3dd3-72fc-8e37-2206ee6da0c8_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Interest expense</link:label>
    <link:label id="lab_us-gaap_InterestExpense_019fed4d-3dd3-7f70-8f6a-fdac1b16e195_totalLabel_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total interest and credit facility fees expense</link:label>
    <link:label id="lab_us-gaap_InterestExpense_label_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense, Operating and Nonoperating</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpense" xlink:to="lab_us-gaap_InterestExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_January2038ClassBCLONotesMember_019fed4d-3e56-7f64-a274-faaa88da644d_terseLabel_en-US" xlink:label="lab_arcc_January2038ClassBCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">January 2038 Class B CLO Notes</link:label>
    <link:label id="lab_arcc_January2038ClassBCLONotesMember_label_en-US" xlink:label="lab_arcc_January2038ClassBCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">January 2038 Class B CLO Notes [Member]</link:label>
    <link:label id="lab_arcc_January2038ClassBCLONotesMember_documentation_en-US" xlink:label="lab_arcc_January2038ClassBCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">January 2038 Class B CLO Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_January2038ClassBCLONotesMember" xlink:href="arcc-20260930.xsd#arcc_January2038ClassBCLONotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_January2038ClassBCLONotesMember" xlink:to="lab_arcc_January2038ClassBCLONotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_019fed4d-3dd3-74be-b7ee-fa7f5512e06b_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Long-term Debt</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Long-Term Debt Instruments [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDebtInstrumentsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:to="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TheTeachingCompanyHoldingsIncMember_019fed4d-3dd3-7428-8763-6e3bb095289b_terseLabel_en-US" xlink:label="lab_arcc_TheTeachingCompanyHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">The Teaching Company Holdings, Inc.</link:label>
    <link:label id="lab_arcc_TheTeachingCompanyHoldingsIncMember_label_en-US" xlink:label="lab_arcc_TheTeachingCompanyHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">The Teaching Company Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_TheTeachingCompanyHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_TheTeachingCompanyHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The Teaching Company Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TheTeachingCompanyHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_TheTeachingCompanyHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TheTeachingCompanyHoldingsIncMember" xlink:to="lab_arcc_TheTeachingCompanyHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentsActivityAndFairValueTableAbstract_019fed4d-3e56-7ca1-a81e-920768b07cc2_terseLabel_en-US" xlink:label="lab_arcc_InvestmentsActivityAndFairValueTableAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments Activity And Fair Value Table [Abstract]</link:label>
    <link:label id="lab_arcc_InvestmentsActivityAndFairValueTableAbstract_label_en-US" xlink:label="lab_arcc_InvestmentsActivityAndFairValueTableAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments Activity And Fair Value Table [Abstract]</link:label>
    <link:label id="lab_arcc_InvestmentsActivityAndFairValueTableAbstract_documentation_en-US" xlink:label="lab_arcc_InvestmentsActivityAndFairValueTableAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investments Activity And Fair Value Table</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentsActivityAndFairValueTableAbstract" xlink:href="arcc-20260930.xsd#arcc_InvestmentsActivityAndFairValueTableAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentsActivityAndFairValueTableAbstract" xlink:to="lab_arcc_InvestmentsActivityAndFairValueTableAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditMember_019fed4d-3e56-70ca-ad30-4a4cfa85def6_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit</link:label>
    <link:label id="lab_us-gaap_LineOfCreditMember_label_en-US" xlink:label="lab_us-gaap_LineOfCreditMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditMember" xlink:to="lab_us-gaap_LineOfCreditMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_RestatementDeterminationDate_terseLabel_en-US" xlink:label="lab_ecd_RestatementDeterminationDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restatement Determination Date</link:label>
    <link:label id="lab_ecd_RestatementDeterminationDate_label_en-US" xlink:label="lab_ecd_RestatementDeterminationDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement Determination Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_RestatementDeterminationDate" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_RestatementDeterminationDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_RestatementDeterminationDate" xlink:to="lab_ecd_RestatementDeterminationDate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit_019fed4d-3dd3-7793-8407-505c909f3950_terseLabel_en-US" xlink:label="lab_us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income tax expense on net realized gains</link:label>
    <link:label id="lab_us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit_label_en-US" xlink:label="lab_us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Realized Gain (Loss), Investment and Derivative, Operating, Tax Expense (Benefit)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit" xlink:to="lab_us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingTaxExpenseBenefit" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OtherSectorMember_019fed4d-3e56-7cfe-b84c-ee97c4fc53b2_terseLabel_en-US" xlink:label="lab_arcc_OtherSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_arcc_OtherSectorMember_label_en-US" xlink:label="lab_arcc_OtherSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Sector [Member]</link:label>
    <link:label id="lab_arcc_OtherSectorMember_documentation_en-US" xlink:label="lab_arcc_OtherSectorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Sector</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OtherSectorMember" xlink:href="arcc-20260930.xsd#arcc_OtherSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OtherSectorMember" xlink:to="lab_arcc_OtherSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentUnaffiliatedIssuerMember_019fed4d-3e56-7dec-9717-9e2d62f9f3b8_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-controlled/non-affiliate company investments</link:label>
    <link:label id="lab_us-gaap_InvestmentUnaffiliatedIssuerMember_label_en-US" xlink:label="lab_us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Unaffiliated Issuer [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentUnaffiliatedIssuerMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:to="lab_us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BambooPurchaserInc.Member_019fed4d-3dd3-77cb-97ee-8583b1ddb4c0_terseLabel_en-US" xlink:label="lab_arcc_BambooPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bamboo Purchaser, Inc.</link:label>
    <link:label id="lab_arcc_BambooPurchaserInc.Member_label_en-US" xlink:label="lab_arcc_BambooPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bamboo Purchaser, Inc. [Member]</link:label>
    <link:label id="lab_arcc_BambooPurchaserInc.Member_documentation_en-US" xlink:label="lab_arcc_BambooPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bamboo Purchaser, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BambooPurchaserInc.Member" xlink:href="arcc-20260930.xsd#arcc_BambooPurchaserInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BambooPurchaserInc.Member" xlink:to="lab_arcc_BambooPurchaserInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock_019fed4d-3e56-7aa8-b24f-21b725910b11_terseLabel_en-US" xlink:label="lab_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Selected Financial Information</link:label>
    <link:label id="lab_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock_label_en-US" xlink:label="lab_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Financial Statements [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfCondensedFinancialStatementsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:to="lab_srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_AmendmentFlag_019fed4d-3e56-7d13-b7df-e702f9801c12_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:label id="lab_dei_AmendmentFlag_label_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag" xlink:to="lab_dei_AmendmentFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities_019fed4d-3d42-7bcd-8b55-cf61825f6746_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable and other liabilities</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Payable and Other Operating Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndOtherOperatingLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TeamAcquisitionCorporationMember_019fed4d-3dd3-7d5f-b36d-dae86d8ca2be_terseLabel_en-US" xlink:label="lab_arcc_TeamAcquisitionCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Team Acquisition Corporation</link:label>
    <link:label id="lab_arcc_TeamAcquisitionCorporationMember_label_en-US" xlink:label="lab_arcc_TeamAcquisitionCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Team Acquisition Corporation [Member]</link:label>
    <link:label id="lab_arcc_TeamAcquisitionCorporationMember_documentation_en-US" xlink:label="lab_arcc_TeamAcquisitionCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Team Acquisition Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TeamAcquisitionCorporationMember" xlink:href="arcc-20260930.xsd#arcc_TeamAcquisitionCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TeamAcquisitionCorporationMember" xlink:to="lab_arcc_TeamAcquisitionCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DerivativeAssetBeforeUpfrontPaymentOrReceipt_01a178d9-872f-755a-9a05-f9e93185756b_terseLabel_en-US" xlink:label="lab_arcc_DerivativeAssetBeforeUpfrontPaymentOrReceipt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative, interest rate swap, value (asset)</link:label>
    <link:label id="lab_arcc_DerivativeAssetBeforeUpfrontPaymentOrReceipt_label_en-US" xlink:label="lab_arcc_DerivativeAssetBeforeUpfrontPaymentOrReceipt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, before Upfront Payment or Receipt</link:label>
    <link:label id="lab_arcc_DerivativeAssetBeforeUpfrontPaymentOrReceipt_documentation_en-US" xlink:label="lab_arcc_DerivativeAssetBeforeUpfrontPaymentOrReceipt" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Derivative Asset, before Upfront Payment or Receipt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DerivativeAssetBeforeUpfrontPaymentOrReceipt" xlink:href="arcc-20260930.xsd#arcc_DerivativeAssetBeforeUpfrontPaymentOrReceipt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DerivativeAssetBeforeUpfrontPaymentOrReceipt" xlink:to="lab_arcc_DerivativeAssetBeforeUpfrontPaymentOrReceipt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_StockIssuedDuringPeriodSharesPurchasedToSatisfyDividends_019fed4d-3d42-737c-9c7d-00ee8f5dd132_terseLabel_en-US" xlink:label="lab_arcc_StockIssuedDuringPeriodSharesPurchasedToSatisfyDividends" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares purchased by plan agent to satisfy dividends declared and payable during the period for stockholders (in shares)</link:label>
    <link:label id="lab_arcc_StockIssuedDuringPeriodSharesPurchasedToSatisfyDividends_label_en-US" xlink:label="lab_arcc_StockIssuedDuringPeriodSharesPurchasedToSatisfyDividends" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares Purchased To Satisfy Dividends</link:label>
    <link:label id="lab_arcc_StockIssuedDuringPeriodSharesPurchasedToSatisfyDividends_documentation_en-US" xlink:label="lab_arcc_StockIssuedDuringPeriodSharesPurchasedToSatisfyDividends" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares Purchased To Satisfy Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_StockIssuedDuringPeriodSharesPurchasedToSatisfyDividends" xlink:href="arcc-20260930.xsd#arcc_StockIssuedDuringPeriodSharesPurchasedToSatisfyDividends"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_StockIssuedDuringPeriodSharesPurchasedToSatisfyDividends" xlink:to="lab_arcc_StockIssuedDuringPeriodSharesPurchasedToSatisfyDividends" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetInvestmentIncome_019fed4d-3d42-7f4c-a6da-46aeb5df4b76_totalLabel_en-US" xlink:label="lab_us-gaap_NetInvestmentIncome" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">NET INVESTMENT INCOME BEFORE INCOME TAXES</link:label>
    <link:label id="lab_us-gaap_NetInvestmentIncome_label_en-US" xlink:label="lab_us-gaap_NetInvestmentIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Investment Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetInvestmentIncome" xlink:to="lab_us-gaap_NetInvestmentIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentTypeCategorizationMember_019fed4d-3e56-7285-a04b-642186a08bb5_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments [Domain]</link:label>
    <link:label id="lab_us-gaap_InvestmentTypeCategorizationMember_label_en-US" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember" xlink:to="lab_us-gaap_InvestmentTypeCategorizationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPIKInterestAndDividends_019fed4d-3dd3-705f-93b4-8abccf4527f0_terseLabel_en-US" xlink:label="lab_arcc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPIKInterestAndDividends" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PIK interest and dividends</link:label>
    <link:label id="lab_arcc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPIKInterestAndDividends_label_en-US" xlink:label="lab_arcc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPIKInterestAndDividends" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, PIK Interest And Dividends</link:label>
    <link:label id="lab_arcc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPIKInterestAndDividends_documentation_en-US" xlink:label="lab_arcc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPIKInterestAndDividends" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, PIK Interest And Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPIKInterestAndDividends" xlink:href="arcc-20260930.xsd#arcc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPIKInterestAndDividends"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPIKInterestAndDividends" xlink:to="lab_arcc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPIKInterestAndDividends" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember_019fed4d-3dd3-700c-819d-2c9e750b7d31_terseLabel_en-US" xlink:label="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P.</link:label>
    <link:label id="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember_label_en-US" xlink:label="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">North American Science Associates, LLC, Cardinal Purchaser LLC and Cardinal Topco Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:to="lab_arcc_NorthAmericanScienceAssociatesLLCCardinalPurchaserLLCAndCardinalTopcoHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInManagementFeePayable_019fed4d-3dd3-7967-894e-b5fed018d239_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInManagementFeePayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base management fee payable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInManagementFeePayable_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInManagementFeePayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Management Fee Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInManagementFeePayable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInManagementFeePayable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInManagementFeePayable" xlink:to="lab_us-gaap_IncreaseDecreaseInManagementFeePayable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansUnitrancheMember_019fed4d-3e56-7ebf-8370-3b69a97f8f10_terseLabel_en-US" xlink:label="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansUnitrancheMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unitranche loans</link:label>
    <link:label id="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansUnitrancheMember_label_en-US" xlink:label="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansUnitrancheMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, First Lien Senior Secured Loans, Unitranche [Member]</link:label>
    <link:label id="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansUnitrancheMember_documentation_en-US" xlink:label="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansUnitrancheMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Securities, First Lien Senior Secured Loans, Unitranche</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansUnitrancheMember" xlink:href="arcc-20260930.xsd#arcc_DebtSecuritiesFirstLienSeniorSecuredLoansUnitrancheMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansUnitrancheMember" xlink:to="lab_arcc_DebtSecuritiesFirstLienSeniorSecuredLoansUnitrancheMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DecoPacIncAndKCAKEHoldingsIncMember_019fed4d-3d42-7180-b017-b764db63164d_terseLabel_en-US" xlink:label="lab_arcc_DecoPacIncAndKCAKEHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DecoPac, Inc. and KCAKE Holdings Inc.</link:label>
    <link:label id="lab_arcc_DecoPacIncAndKCAKEHoldingsIncMember_label_en-US" xlink:label="lab_arcc_DecoPacIncAndKCAKEHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">DecoPac, Inc. and KCAKE Holdings Inc. [Member]</link:label>
    <link:label id="lab_arcc_DecoPacIncAndKCAKEHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_DecoPacIncAndKCAKEHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">DecoPac, Inc. and KCAKE Holdings Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DecoPacIncAndKCAKEHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_DecoPacIncAndKCAKEHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DecoPacIncAndKCAKEHoldingsIncMember" xlink:to="lab_arcc_DecoPacIncAndKCAKEHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AdjToNonPeoNeoCompFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to Non-PEO NEO Compensation Footnote</link:label>
    <link:label id="lab_ecd_AdjToNonPeoNeoCompFnTextBlock_label_en-US" xlink:label="lab_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Non-PEO NEO Compensation Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AdjToNonPeoNeoCompFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:to="lab_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_019fed4d-3d42-7700-88b0-44ec90ab664c_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transfers into Level 3</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RevivalAnimalHealthLLCMember_019fed4d-3d41-7689-bb4f-afb4a1b334bc_terseLabel_en-US" xlink:label="lab_arcc_RevivalAnimalHealthLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revival Animal Health, LLC</link:label>
    <link:label id="lab_arcc_RevivalAnimalHealthLLCMember_label_en-US" xlink:label="lab_arcc_RevivalAnimalHealthLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revival Animal Health, LLC [Member]</link:label>
    <link:label id="lab_arcc_RevivalAnimalHealthLLCMember_documentation_en-US" xlink:label="lab_arcc_RevivalAnimalHealthLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revival Animal Health, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RevivalAnimalHealthLLCMember" xlink:href="arcc-20260930.xsd#arcc_RevivalAnimalHealthLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RevivalAnimalHealthLLCMember" xlink:to="lab_arcc_RevivalAnimalHealthLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressStateOrProvince_019fed4d-3d42-7435-b4c4-580eaf501a0b_terseLabel_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:label id="lab_dei_EntityAddressStateOrProvince_label_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressStateOrProvince" xlink:to="lab_dei_EntityAddressStateOrProvince" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ClientOfVaragonMember_019fed4d-3d42-7fdd-ad56-eb67593e0d7b_terseLabel_en-US" xlink:label="lab_arcc_ClientOfVaragonMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Client of Varagon</link:label>
    <link:label id="lab_arcc_ClientOfVaragonMember_label_en-US" xlink:label="lab_arcc_ClientOfVaragonMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Client Of Varagon [Member]</link:label>
    <link:label id="lab_arcc_ClientOfVaragonMember_documentation_en-US" xlink:label="lab_arcc_ClientOfVaragonMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Client Of Varagon</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ClientOfVaragonMember" xlink:href="arcc-20260930.xsd#arcc_ClientOfVaragonMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ClientOfVaragonMember" xlink:to="lab_arcc_ClientOfVaragonMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeoTotalCompAmt_terseLabel_en-US" xlink:label="lab_ecd_PeoTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO Total Compensation Amount</link:label>
    <link:label id="lab_ecd_PeoTotalCompAmt_label_en-US" xlink:label="lab_ecd_PeoTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO Total Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoTotalCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PeoTotalCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoTotalCompAmt" xlink:to="lab_ecd_PeoTotalCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RevolvingLoanCommitmentsMember_019fed4d-3d42-7ff5-9037-0618c14b22dd_terseLabel_en-US" xlink:label="lab_arcc_RevolvingLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving loan commitments</link:label>
    <link:label id="lab_arcc_RevolvingLoanCommitmentsMember_label_en-US" xlink:label="lab_arcc_RevolvingLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving Loan Commitments [Member]</link:label>
    <link:label id="lab_arcc_RevolvingLoanCommitmentsMember_documentation_en-US" xlink:label="lab_arcc_RevolvingLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revolving Loan Commitments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RevolvingLoanCommitmentsMember" xlink:href="arcc-20260930.xsd#arcc_RevolvingLoanCommitmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RevolvingLoanCommitmentsMember" xlink:to="lab_arcc_RevolvingLoanCommitmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember_019fed4d-3e56-7e1a-b27e-d198b044e01c_terseLabel_en-US" xlink:label="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AthenaHealth Group Inc., Minerva Holdco, Inc. and BCPE Co-Invest (A), LP</link:label>
    <link:label id="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember_label_en-US" xlink:label="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AthenaHealth Group Inc., Minerva Holdco, Inc. and BCPE Co-Invest (A), LP [Member]</link:label>
    <link:label id="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember_documentation_en-US" xlink:label="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">AthenaHealth Group Inc., Minerva Holdco, Inc. and BCPE Co-Invest (A), LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:href="arcc-20260930.xsd#arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:to="lab_arcc_AthenaHealthGroupIncMinervaHoldcoIncAndBCPECoInvestALPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyUnavailableCommitments_019fed4d-3e56-764f-b3a0-d55d90763b1b_negatedTerseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyUnavailableCommitments" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less: unavailable loan commitments due to borrowing base or other covenant restrictions</link:label>
    <link:label id="lab_arcc_InvestmentCompanyUnavailableCommitments_label_en-US" xlink:label="lab_arcc_InvestmentCompanyUnavailableCommitments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Unavailable Commitments</link:label>
    <link:label id="lab_arcc_InvestmentCompanyUnavailableCommitments_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyUnavailableCommitments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Unavailable Commitments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyUnavailableCommitments" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyUnavailableCommitments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyUnavailableCommitments" xlink:to="lab_arcc_InvestmentCompanyUnavailableCommitments" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GasUtilitiesMember_019fed4d-3d42-79e6-8bbf-8232b7c53777_terseLabel_en-US" xlink:label="lab_arcc_GasUtilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gas Utilities</link:label>
    <link:label id="lab_arcc_GasUtilitiesMember_label_en-US" xlink:label="lab_arcc_GasUtilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gas Utilities [Member]</link:label>
    <link:label id="lab_arcc_GasUtilitiesMember_documentation_en-US" xlink:label="lab_arcc_GasUtilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gas Utilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GasUtilitiesMember" xlink:href="arcc-20260930.xsd#arcc_GasUtilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GasUtilitiesMember" xlink:to="lab_arcc_GasUtilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeNotionalAmount_019fed4d-3dd3-75b8-b1ad-a18b309aba34_netLabel_en-US" xlink:label="lab_us-gaap_DerivativeNotionalAmount" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US">Notional Amount</link:label>
    <link:label id="lab_us-gaap_DerivativeNotionalAmount_019fed4d-3dd3-7e8c-941d-96dcb51685b0_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Notional Amount</link:label>
    <link:label id="lab_us-gaap_DerivativeNotionalAmount_label_en-US" xlink:label="lab_us-gaap_DerivativeNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Notional Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeNotionalAmount" xlink:to="lab_us-gaap_DerivativeNotionalAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019fed4d-3e56-757e-9d8b-6a22ff97194b_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basic weighted average shares of common stock outstanding (in shares)</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Basic</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:to="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember_019fed4d-3e56-7cf5-820e-6ebeed136489_terseLabel_en-US" xlink:label="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC</link:label>
    <link:label id="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Olympia Acquisition, Inc., Olympia TopCo, L.P., and Asclepius Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:to="lab_arcc_OlympiaAcquisitionIncOlympiaTopCoLPAndAsclepiusHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_KnightAcquireCoLLCAndKnightHoldingsLPMember_019fed4d-3e56-78d0-abbd-9143fea892ae_terseLabel_en-US" xlink:label="lab_arcc_KnightAcquireCoLLCAndKnightHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Knight AcquireCo, LLC and Knight Holdings, LP</link:label>
    <link:label id="lab_arcc_KnightAcquireCoLLCAndKnightHoldingsLPMember_label_en-US" xlink:label="lab_arcc_KnightAcquireCoLLCAndKnightHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Knight AcquireCo, LLC and Knight Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_KnightAcquireCoLLCAndKnightHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_KnightAcquireCoLLCAndKnightHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Knight AcquireCo, LLC and Knight Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KnightAcquireCoLLCAndKnightHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_KnightAcquireCoLLCAndKnightHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KnightAcquireCoLLCAndKnightHoldingsLPMember" xlink:to="lab_arcc_KnightAcquireCoLLCAndKnightHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember_019fed4d-3e56-790c-88d5-d49cc44cbad1_terseLabel_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incentive Rate, Quarterly Catch-Up Threshold</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember_label_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Quarterly Catch-Up Threshold [Member]</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember_documentation_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Quarterly Catch-Up Threshold</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember" xlink:href="arcc-20260930.xsd#arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember" xlink:to="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateQuarterlyCatchUpThresholdMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfInvestmentsAbstract_019fed4d-3e56-73c8-b1dc-b5fa05be446b_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Investments [Abstract]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfInvestmentsAbstract_label_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Investments [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfInvestmentsAbstract" xlink:to="lab_us-gaap_ScheduleOfInvestmentsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InterestRateSwap4Member_019fed4d-3e56-7468-b803-9a5ba3c179a3_terseLabel_en-US" xlink:label="lab_arcc_InterestRateSwap4Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate swap 4</link:label>
    <link:label id="lab_arcc_InterestRateSwap4Member_label_en-US" xlink:label="lab_arcc_InterestRateSwap4Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 4 [Member]</link:label>
    <link:label id="lab_arcc_InterestRateSwap4Member_documentation_en-US" xlink:label="lab_arcc_InterestRateSwap4Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 4</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestRateSwap4Member" xlink:href="arcc-20260930.xsd#arcc_InterestRateSwap4Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InterestRateSwap4Member" xlink:to="lab_arcc_InterestRateSwap4Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentsAbstract_019fed4d-3dd3-7c1e-b88f-226334493c4b_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments at fair value</link:label>
    <link:label id="lab_us-gaap_InvestmentsAbstract_label_en-US" xlink:label="lab_us-gaap_InvestmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsAbstract" xlink:to="lab_us-gaap_InvestmentsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ApexServicePartnersLLCAndApexServicePartnersHoldingsLLCMember_019fed4d-3e55-7b7e-bd02-04ec13ec1e93_terseLabel_en-US" xlink:label="lab_arcc_ApexServicePartnersLLCAndApexServicePartnersHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Apex Service Partners, LLC and Apex Service Partners Holdings, LLC</link:label>
    <link:label id="lab_arcc_ApexServicePartnersLLCAndApexServicePartnersHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_ApexServicePartnersLLCAndApexServicePartnersHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Apex Service Partners, LLC and Apex Service Partners Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_ApexServicePartnersLLCAndApexServicePartnersHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_ApexServicePartnersLLCAndApexServicePartnersHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Apex Service Partners, LLC and Apex Service Partners Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ApexServicePartnersLLCAndApexServicePartnersHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_ApexServicePartnersLLCAndApexServicePartnersHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ApexServicePartnersLLCAndApexServicePartnersHoldingsLLCMember" xlink:to="lab_arcc_ApexServicePartnersLLCAndApexServicePartnersHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_019fed4d-3e56-7902-bcb1-e92726ea3c1c_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Interest receivable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accrued Interest Receivable, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:to="lab_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SilkHoldingsIIILLCAndSilkHoldingsICorp.Member_019fed4d-3dd3-78b8-b541-6013e28e8f5c_terseLabel_en-US" xlink:label="lab_arcc_SilkHoldingsIIILLCAndSilkHoldingsICorp.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Silk Holdings III LLC and Silk Holdings I Corp.,</link:label>
    <link:label id="lab_arcc_SilkHoldingsIIILLCAndSilkHoldingsICorp.Member_label_en-US" xlink:label="lab_arcc_SilkHoldingsIIILLCAndSilkHoldingsICorp.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Silk Holdings III LLC and Silk Holdings I Corp., [Member]</link:label>
    <link:label id="lab_arcc_SilkHoldingsIIILLCAndSilkHoldingsICorp.Member_documentation_en-US" xlink:label="lab_arcc_SilkHoldingsIIILLCAndSilkHoldingsICorp.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Silk Holdings III LLC and Silk Holdings I Corp.,</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SilkHoldingsIIILLCAndSilkHoldingsICorp.Member" xlink:href="arcc-20260930.xsd#arcc_SilkHoldingsIIILLCAndSilkHoldingsICorp.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SilkHoldingsIIILLCAndSilkHoldingsICorp.Member" xlink:to="lab_arcc_SilkHoldingsIIILLCAndSilkHoldingsICorp.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RBHoldingsInterCoLLCMember_019fed4d-3e56-7852-9064-1dae152d78f6_terseLabel_en-US" xlink:label="lab_arcc_RBHoldingsInterCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">RB Holdings InterCo, LLC</link:label>
    <link:label id="lab_arcc_RBHoldingsInterCoLLCMember_label_en-US" xlink:label="lab_arcc_RBHoldingsInterCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">RB Holdings InterCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_RBHoldingsInterCoLLCMember_documentation_en-US" xlink:label="lab_arcc_RBHoldingsInterCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">RB Holdings InterCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RBHoldingsInterCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_RBHoldingsInterCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RBHoldingsInterCoLLCMember" xlink:to="lab_arcc_RBHoldingsInterCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTaxIncludingGainLossOnDebtExtinguishment_019fed4d-3d41-7f42-a360-cfdbb86b4f15_terseLabel_en-US" xlink:label="lab_arcc_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTaxIncludingGainLossOnDebtExtinguishment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized losses (gains) on investments, foreign currency, extinguishment of debt and other transactions</link:label>
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    <link:label id="lab_arcc_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTaxIncludingGainLossOnDebtExtinguishment_documentation_en-US" xlink:label="lab_arcc_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTaxIncludingGainLossOnDebtExtinguishment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Realized Gain (Loss), Investment, Derivative, And Foreign Currency Transaction Price Change, Operating, After Tax, Including Gain (Loss) On Debt Extinguishment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTaxIncludingGainLossOnDebtExtinguishment" xlink:href="arcc-20260930.xsd#arcc_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTaxIncludingGainLossOnDebtExtinguishment"/>
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    <link:label id="lab_arcc_ValuationTechniqueYieldAnalysisMember_label_en-US" xlink:label="lab_arcc_ValuationTechniqueYieldAnalysisMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Technique, Yield Analysis [Member]</link:label>
    <link:label id="lab_arcc_ValuationTechniqueYieldAnalysisMember_documentation_en-US" xlink:label="lab_arcc_ValuationTechniqueYieldAnalysisMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Valuation Technique, Yield Analysis</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ValuationTechniqueYieldAnalysisMember" xlink:href="arcc-20260930.xsd#arcc_ValuationTechniqueYieldAnalysisMember"/>
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    <link:label id="lab_arcc_SundanceGroupHoldingsIncMember_019fed4d-3dd3-7257-9b28-9730ebde9728_terseLabel_en-US" xlink:label="lab_arcc_SundanceGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sundance Group Holdings, Inc.</link:label>
    <link:label id="lab_arcc_SundanceGroupHoldingsIncMember_label_en-US" xlink:label="lab_arcc_SundanceGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sundance Group Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_SundanceGroupHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_SundanceGroupHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sundance Group Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SundanceGroupHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_SundanceGroupHoldingsIncMember"/>
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    <link:label id="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember_019fed4d-3dd3-7c38-bfba-d242c8abbe69_terseLabel_en-US" xlink:label="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plaskolite PPC Intermediate II LLC and Plaskolite PPC Blocker LLC</link:label>
    <link:label id="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember_label_en-US" xlink:label="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plaskolite PPC Intermediate II LLC and Plaskolite PPC Blocker LLC [Member]</link:label>
    <link:label id="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember_documentation_en-US" xlink:label="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Plaskolite PPC Intermediate II LLC and Plaskolite PPC Blocker LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:href="arcc-20260930.xsd#arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:to="lab_arcc_PlaskolitePPCIntermediateIILLCAndPlaskolitePPCBlockerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtAverageAmountOutstanding_01a11f30-b12f-796e-8a89-4e08a7a93714_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtAverageAmountOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average amount outstanding</link:label>
    <link:label id="lab_us-gaap_LongTermDebtAverageAmountOutstanding_label_en-US" xlink:label="lab_us-gaap_LongTermDebtAverageAmountOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Average Amount Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAverageAmountOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAverageAmountOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtAverageAmountOutstanding" xlink:to="lab_us-gaap_LongTermDebtAverageAmountOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_A15484880CanadaInc.And15484910CanadaInc.Member_019fed4d-3dd3-7db0-a5be-8d9c95c01e7b_terseLabel_en-US" xlink:label="lab_arcc_A15484880CanadaInc.And15484910CanadaInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">15484880 Canada Inc. and 15484910 Canada Inc.</link:label>
    <link:label id="lab_arcc_A15484880CanadaInc.And15484910CanadaInc.Member_label_en-US" xlink:label="lab_arcc_A15484880CanadaInc.And15484910CanadaInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">15484880 Canada Inc. and 15484910 Canada Inc. [Member]</link:label>
    <link:label id="lab_arcc_A15484880CanadaInc.And15484910CanadaInc.Member_documentation_en-US" xlink:label="lab_arcc_A15484880CanadaInc.And15484910CanadaInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">15484880 Canada Inc. and 15484910 Canada Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_A15484880CanadaInc.And15484910CanadaInc.Member" xlink:href="arcc-20260930.xsd#arcc_A15484880CanadaInc.And15484910CanadaInc.Member"/>
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    <link:label id="lab_arcc_SToysHoldingsLLCFkaTheStep2CompanyLLCMember_019fed4d-3d42-74fd-bd33-4e286c0b2417_terseLabel_en-US" xlink:label="lab_arcc_SToysHoldingsLLCFkaTheStep2CompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">S Toys Holdings LLC (fka The Step2 Company, LLC)</link:label>
    <link:label id="lab_arcc_SToysHoldingsLLCFkaTheStep2CompanyLLCMember_label_en-US" xlink:label="lab_arcc_SToysHoldingsLLCFkaTheStep2CompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">S Toys Holdings LLC (fka The Step2 Company, LLC) [Member]</link:label>
    <link:label id="lab_arcc_SToysHoldingsLLCFkaTheStep2CompanyLLCMember_documentation_en-US" xlink:label="lab_arcc_SToysHoldingsLLCFkaTheStep2CompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">S Toys Holdings LLC (fka The Step2 Company, LLC)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SToysHoldingsLLCFkaTheStep2CompanyLLCMember" xlink:href="arcc-20260930.xsd#arcc_SToysHoldingsLLCFkaTheStep2CompanyLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SToysHoldingsLLCFkaTheStep2CompanyLLCMember" xlink:to="lab_arcc_SToysHoldingsLLCFkaTheStep2CompanyLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgMnpiDiscTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgMnpiDiscTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing MNPI Disclosure</link:label>
    <link:label id="lab_ecd_AwardTmgMnpiDiscTextBlock_label_en-US" xlink:label="lab_ecd_AwardTmgMnpiDiscTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing MNPI Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMnpiDiscTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgMnpiDiscTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgMnpiDiscTextBlock" xlink:to="lab_ecd_AwardTmgMnpiDiscTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_019fed4d-3dd3-71cc-8778-430e3ab1de51_terseLabel_en-US" xlink:label="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basis of Presentation</link:label>
    <link:label id="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Basis of Accounting, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock"/>
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    <link:label id="lab_arcc_SymplrSoftwareIncAndSymplrSoftwareIntermediateHoldingsIncMember_019fed4d-3dd3-71f0-8fe5-443244a9e0bb_terseLabel_en-US" xlink:label="lab_arcc_SymplrSoftwareIncAndSymplrSoftwareIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Symplr Software Inc. and Symplr Software Intermediate Holdings, Inc.</link:label>
    <link:label id="lab_arcc_SymplrSoftwareIncAndSymplrSoftwareIntermediateHoldingsIncMember_label_en-US" xlink:label="lab_arcc_SymplrSoftwareIncAndSymplrSoftwareIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Symplr Software Inc. and Symplr Software Intermediate Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_SymplrSoftwareIncAndSymplrSoftwareIntermediateHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_SymplrSoftwareIncAndSymplrSoftwareIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Symplr Software Inc. and Symplr Software Intermediate Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SymplrSoftwareIncAndSymplrSoftwareIntermediateHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_SymplrSoftwareIncAndSymplrSoftwareIntermediateHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SymplrSoftwareIncAndSymplrSoftwareIntermediateHoldingsIncMember" xlink:to="lab_arcc_SymplrSoftwareIncAndSymplrSoftwareIntermediateHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractAUD1Member_019fed4d-3dd3-74ad-900e-b4b4ee825845_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractAUD1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, AUD 1</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractAUD1Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractAUD1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, AUD 1 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractAUD1Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractAUD1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, AUD 1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractAUD1Member" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractAUD1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractAUD1Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractAUD1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MeritFinancialGroupLLCAndCWCFundIMFALPMember_019fed4d-3dd3-70b6-9118-9aef60ae782a_terseLabel_en-US" xlink:label="lab_arcc_MeritFinancialGroupLLCAndCWCFundIMFALPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Merit Financial Group, LLC and CWC Fund I Co-Invest (MFA) LP</link:label>
    <link:label id="lab_arcc_MeritFinancialGroupLLCAndCWCFundIMFALPMember_label_en-US" xlink:label="lab_arcc_MeritFinancialGroupLLCAndCWCFundIMFALPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Merit Financial Group, LLC and CWC Fund I (MFA) LP [Member]</link:label>
    <link:label id="lab_arcc_MeritFinancialGroupLLCAndCWCFundIMFALPMember_documentation_en-US" xlink:label="lab_arcc_MeritFinancialGroupLLCAndCWCFundIMFALPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Merit Financial Group, LLC and CWC Fund I (MFA) LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MeritFinancialGroupLLCAndCWCFundIMFALPMember" xlink:href="arcc-20260930.xsd#arcc_MeritFinancialGroupLLCAndCWCFundIMFALPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MeritFinancialGroupLLCAndCWCFundIMFALPMember" xlink:to="lab_arcc_MeritFinancialGroupLLCAndCWCFundIMFALPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_019fed4d-3dd3-76a4-a2eb-78ed79f25cad_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares issued in connection with dividend reinvestment plan</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Dividend Reinvestment Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ImplusFootcareLLCImplusHoldingsLLCAndImplusTopcoLLCMember_019fed4d-3e56-78b3-9e37-4628c32e1521_terseLabel_en-US" xlink:label="lab_arcc_ImplusFootcareLLCImplusHoldingsLLCAndImplusTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Implus Footcare, LLC</link:label>
    <link:label id="lab_arcc_ImplusFootcareLLCImplusHoldingsLLCAndImplusTopcoLLCMember_label_en-US" xlink:label="lab_arcc_ImplusFootcareLLCImplusHoldingsLLCAndImplusTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Implus Footcare, LLC, Implus Holdings, LLC, and Implus Topco, LLC [Member]</link:label>
    <link:label id="lab_arcc_ImplusFootcareLLCImplusHoldingsLLCAndImplusTopcoLLCMember_documentation_en-US" xlink:label="lab_arcc_ImplusFootcareLLCImplusHoldingsLLCAndImplusTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Implus Footcare, LLC, Implus Holdings, LLC, and Implus Topco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ImplusFootcareLLCImplusHoldingsLLCAndImplusTopcoLLCMember" xlink:href="arcc-20260930.xsd#arcc_ImplusFootcareLLCImplusHoldingsLLCAndImplusTopcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ImplusFootcareLLCImplusHoldingsLLCAndImplusTopcoLLCMember" xlink:to="lab_arcc_ImplusFootcareLLCImplusHoldingsLLCAndImplusTopcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessAcquisitionNumberOfCommonStockSharesAcquired_01a17ad2-3371-78e4-af71-1699ce256590_terseLabel_en-US" xlink:label="lab_arcc_BusinessAcquisitionNumberOfCommonStockSharesAcquired" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock outstanding (in shares)</link:label>
    <link:label id="lab_arcc_BusinessAcquisitionNumberOfCommonStockSharesAcquired_label_en-US" xlink:label="lab_arcc_BusinessAcquisitionNumberOfCommonStockSharesAcquired" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Number of Common Stock Shares Acquired</link:label>
    <link:label id="lab_arcc_BusinessAcquisitionNumberOfCommonStockSharesAcquired_documentation_en-US" xlink:label="lab_arcc_BusinessAcquisitionNumberOfCommonStockSharesAcquired" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Acquisition, Number of Common Stock Shares Acquired</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessAcquisitionNumberOfCommonStockSharesAcquired" xlink:href="arcc-20260930.xsd#arcc_BusinessAcquisitionNumberOfCommonStockSharesAcquired"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessAcquisitionNumberOfCommonStockSharesAcquired" xlink:to="lab_arcc_BusinessAcquisitionNumberOfCommonStockSharesAcquired" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019fed4d-3d41-7c0e-843f-9be528e80615_verboseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Aggregate principal amount committed</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019fed4d-3d41-7a06-a390-5a88ec4cc1d7_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Aggregate Principal Amount Committed</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AxiomaticLLCMember_019fed4d-3e56-7aba-9996-ea7da78c0a1f_terseLabel_en-US" xlink:label="lab_arcc_AxiomaticLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Axiomatic, LLC</link:label>
    <link:label id="lab_arcc_AxiomaticLLCMember_label_en-US" xlink:label="lab_arcc_AxiomaticLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Axiomatic, LLC [Member]</link:label>
    <link:label id="lab_arcc_AxiomaticLLCMember_documentation_en-US" xlink:label="lab_arcc_AxiomaticLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Axiomatic, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AxiomaticLLCMember" xlink:href="arcc-20260930.xsd#arcc_AxiomaticLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AxiomaticLLCMember" xlink:to="lab_arcc_AxiomaticLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RevealMidcoLLCAndSeekLenderAggregatorLLCMember_01a1582a-1003-7229-9c9c-18ebf726663b_terseLabel_en-US" xlink:label="lab_arcc_RevealMidcoLLCAndSeekLenderAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reveal Midco, LLC and Seek Lender Aggregator LLC</link:label>
    <link:label id="lab_arcc_RevealMidcoLLCAndSeekLenderAggregatorLLCMember_label_en-US" xlink:label="lab_arcc_RevealMidcoLLCAndSeekLenderAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reveal Midco, LLC and Seek Lender Aggregator LLC [Member]</link:label>
    <link:label id="lab_arcc_RevealMidcoLLCAndSeekLenderAggregatorLLCMember_documentation_en-US" xlink:label="lab_arcc_RevealMidcoLLCAndSeekLenderAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reveal Midco, LLC and Seek Lender Aggregator LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RevealMidcoLLCAndSeekLenderAggregatorLLCMember" xlink:href="arcc-20260930.xsd#arcc_RevealMidcoLLCAndSeekLenderAggregatorLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RevealMidcoLLCAndSeekLenderAggregatorLLCMember" xlink:to="lab_arcc_RevealMidcoLLCAndSeekLenderAggregatorLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NCPMSIBuyerInc.AndNCPMSICoInvestLPMember_019fed4d-3dd3-7de5-a5f7-e71b561bb24e_terseLabel_en-US" xlink:label="lab_arcc_NCPMSIBuyerInc.AndNCPMSICoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NCP-MSI Buyer, Inc. and NCP MSI Co-Invest, LP</link:label>
    <link:label id="lab_arcc_NCPMSIBuyerInc.AndNCPMSICoInvestLPMember_label_en-US" xlink:label="lab_arcc_NCPMSIBuyerInc.AndNCPMSICoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NCP-MSI Buyer, Inc. and NCP MSI Co-Invest, LP [Member]</link:label>
    <link:label id="lab_arcc_NCPMSIBuyerInc.AndNCPMSICoInvestLPMember_documentation_en-US" xlink:label="lab_arcc_NCPMSIBuyerInc.AndNCPMSICoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NCP-MSI Buyer, Inc. and NCP MSI Co-Invest, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NCPMSIBuyerInc.AndNCPMSICoInvestLPMember" xlink:href="arcc-20260930.xsd#arcc_NCPMSIBuyerInc.AndNCPMSICoInvestLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NCPMSIBuyerInc.AndNCPMSICoInvestLPMember" xlink:to="lab_arcc_NCPMSIBuyerInc.AndNCPMSICoInvestLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MedlarBidcoLimitedMember_019fed4d-3e56-7bc4-bf7a-faa037034ca2_terseLabel_en-US" xlink:label="lab_arcc_MedlarBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Medlar Bidco Limited</link:label>
    <link:label id="lab_arcc_MedlarBidcoLimitedMember_label_en-US" xlink:label="lab_arcc_MedlarBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Medlar Bidco Limited [Member]</link:label>
    <link:label id="lab_arcc_MedlarBidcoLimitedMember_documentation_en-US" xlink:label="lab_arcc_MedlarBidcoLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Medlar Bidco Limited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MedlarBidcoLimitedMember" xlink:href="arcc-20260930.xsd#arcc_MedlarBidcoLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MedlarBidcoLimitedMember" xlink:to="lab_arcc_MedlarBidcoLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTextBlock_019fed4d-3e56-7c4c-8da0-d515b461ec78_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">INVESTMENTS</link:label>
    <link:label id="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTextBlock_label_en-US" xlink:label="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Investments [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentHoldingsScheduleOfInvestmentsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTextBlock" xlink:to="lab_us-gaap_InvestmentHoldingsScheduleOfInvestmentsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PDDSHoldCoInc.Member_019fed4d-3e56-7284-9e12-02fe8446d915_terseLabel_en-US" xlink:label="lab_arcc_PDDSHoldCoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PDDS HoldCo, Inc.</link:label>
    <link:label id="lab_arcc_PDDSHoldCoInc.Member_label_en-US" xlink:label="lab_arcc_PDDSHoldCoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PDDS HoldCo, Inc. [Member]</link:label>
    <link:label id="lab_arcc_PDDSHoldCoInc.Member_documentation_en-US" xlink:label="lab_arcc_PDDSHoldCoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PDDS HoldCo, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PDDSHoldCoInc.Member" xlink:href="arcc-20260930.xsd#arcc_PDDSHoldCoInc.Member"/>
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    <link:label id="lab_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_019fed4d-3e56-703b-905f-cd3221521650_terseLabel_en-US" xlink:label="lab_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table]</link:label>
    <link:label id="lab_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_label_en-US" xlink:label="lab_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsidiary or Equity Method Investee, Sale of Stock, Type [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable"/>
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    <link:label id="lab_arcc_TruckLiteCo.LLCECCOHoldingsCorp.AndClarityTechnologiesHoldingsLPMember_019fed4d-3e56-736b-8cb3-2e1a95bad0a7_terseLabel_en-US" xlink:label="lab_arcc_TruckLiteCo.LLCECCOHoldingsCorp.AndClarityTechnologiesHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Truck-Lite Co., LLC, ECCO Holdings Corp., and Clarity Technologies Holdings, LP,</link:label>
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    <link:label id="lab_arcc_TruckLiteCo.LLCECCOHoldingsCorp.AndClarityTechnologiesHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_TruckLiteCo.LLCECCOHoldingsCorp.AndClarityTechnologiesHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Truck-Lite Co., LLC, ECCO Holdings Corp., and Clarity Technologies Holdings, LP,</link:label>
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    <link:label id="lab_us-gaap_InvestmentIncomeInvestmentExpense_019fed4d-3dd3-72dd-9933-5a18ac13af5d_totalLabel_en-US" xlink:label="lab_us-gaap_InvestmentIncomeInvestmentExpense" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total expenses</link:label>
    <link:label id="lab_us-gaap_InvestmentIncomeInvestmentExpense_label_en-US" xlink:label="lab_us-gaap_InvestmentIncomeInvestmentExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Income, Investment Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInvestmentExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInvestmentExpense"/>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AmortizationOfFinancingCosts_019fed4d-3e56-755b-b905-0267cd6777fe_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of debt issuance costs</link:label>
    <link:label id="lab_us-gaap_AmortizationOfFinancingCosts_label_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Debt Issuance Costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfFinancingCosts" xlink:to="lab_us-gaap_AmortizationOfFinancingCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IncentiveFeeExpenseReversal_019fed4d-3dd3-7cb5-909f-26ad280b0018_terseLabel_en-US" xlink:label="lab_arcc_IncentiveFeeExpenseReversal" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital gains incentive fee</link:label>
    <link:label id="lab_arcc_IncentiveFeeExpenseReversal_label_en-US" xlink:label="lab_arcc_IncentiveFeeExpenseReversal" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Incentive Fee Expense (Reversal)</link:label>
    <link:label id="lab_arcc_IncentiveFeeExpenseReversal_documentation_en-US" xlink:label="lab_arcc_IncentiveFeeExpenseReversal" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Incentive Fee Expense (Reversal)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IncentiveFeeExpenseReversal" xlink:href="arcc-20260930.xsd#arcc_IncentiveFeeExpenseReversal"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IncentiveFeeExpenseReversal" xlink:to="lab_arcc_IncentiveFeeExpenseReversal" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_019fed4d-3d41-7848-af3f-f6ce661a4855_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares issued in connection with dividend reinvestment plan (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_019fed4d-3d41-7306-b788-17d3c18b99f6_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Shares issued (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Dividend Reinvestment Plan</link:label>
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    <link:label id="lab_us-gaap_LongTermDebt_019fed4d-3e56-7725-aff8-2e023bf30cc1_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt</link:label>
    <link:label id="lab_us-gaap_LongTermDebt_019fed4d-3e56-70fb-9acf-160f03515cf0_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Carrying Value</link:label>
    <link:label id="lab_us-gaap_LongTermDebt_label_en-US" xlink:label="lab_us-gaap_LongTermDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebt" xlink:to="lab_us-gaap_LongTermDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SSEBuyerIncSupplySourceEnterprisesIncImpactProductsLLCTheSafetyZoneLLCAndSSEParentLPMember_019fed4d-3d41-7bb3-a7c9-4f3f7d76792e_terseLabel_en-US" xlink:label="lab_arcc_SSEBuyerIncSupplySourceEnterprisesIncImpactProductsLLCTheSafetyZoneLLCAndSSEParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SSE Buyer, Inc., Supply Source Enterprises, Inc., Impact Products LLC, The Safety Zone, LLC and SSE Parent, LP</link:label>
    <link:label id="lab_arcc_SSEBuyerIncSupplySourceEnterprisesIncImpactProductsLLCTheSafetyZoneLLCAndSSEParentLPMember_label_en-US" xlink:label="lab_arcc_SSEBuyerIncSupplySourceEnterprisesIncImpactProductsLLCTheSafetyZoneLLCAndSSEParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SSE Buyer, Inc., Supply Source Enterprises, Inc., Impact Products LLC, The Safety Zone, LLC and SSE Parent, LP [Member]</link:label>
    <link:label id="lab_arcc_SSEBuyerIncSupplySourceEnterprisesIncImpactProductsLLCTheSafetyZoneLLCAndSSEParentLPMember_documentation_en-US" xlink:label="lab_arcc_SSEBuyerIncSupplySourceEnterprisesIncImpactProductsLLCTheSafetyZoneLLCAndSSEParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SSE Buyer, Inc., Supply Source Enterprises, Inc., Impact Products LLC, The Safety Zone, LLC and SSE Parent, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SSEBuyerIncSupplySourceEnterprisesIncImpactProductsLLCTheSafetyZoneLLCAndSSEParentLPMember" xlink:href="arcc-20260930.xsd#arcc_SSEBuyerIncSupplySourceEnterprisesIncImpactProductsLLCTheSafetyZoneLLCAndSSEParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SSEBuyerIncSupplySourceEnterprisesIncImpactProductsLLCTheSafetyZoneLLCAndSSEParentLPMember" xlink:to="lab_arcc_SSEBuyerIncSupplySourceEnterprisesIncImpactProductsLLCTheSafetyZoneLLCAndSSEParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_UPIntermediateIILLCAndUPBWBlockerLLCMember_019fed4d-3d42-7f4f-99cf-2b4c5e8ecf62_terseLabel_en-US" xlink:label="lab_arcc_UPIntermediateIILLCAndUPBWBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">UP Intermediate II LLC and UPBW Blocker LLC</link:label>
    <link:label id="lab_arcc_UPIntermediateIILLCAndUPBWBlockerLLCMember_label_en-US" xlink:label="lab_arcc_UPIntermediateIILLCAndUPBWBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">UP Intermediate II LLC and UPBW Blocker LLC [Member]</link:label>
    <link:label id="lab_arcc_UPIntermediateIILLCAndUPBWBlockerLLCMember_documentation_en-US" xlink:label="lab_arcc_UPIntermediateIILLCAndUPBWBlockerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">UP Intermediate II LLC and UPBW Blocker LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_UPIntermediateIILLCAndUPBWBlockerLLCMember" xlink:href="arcc-20260930.xsd#arcc_UPIntermediateIILLCAndUPBWBlockerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_UPIntermediateIILLCAndUPBWBlockerLLCMember" xlink:to="lab_arcc_UPIntermediateIILLCAndUPBWBlockerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAggregatedInvestmentsMember_019fed4d-3d42-7cfa-b297-008ffa3bc660_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherAggregatedInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other equity</link:label>
    <link:label id="lab_us-gaap_OtherAggregatedInvestmentsMember_019fed4d-3d42-7135-bf07-ade507639442_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAggregatedInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other equity</link:label>
    <link:label id="lab_us-gaap_OtherAggregatedInvestmentsMember_label_en-US" xlink:label="lab_us-gaap_OtherAggregatedInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Security Investments [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAggregatedInvestmentsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAggregatedInvestmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAggregatedInvestmentsMember" xlink:to="lab_us-gaap_OtherAggregatedInvestmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019fed4d-3d41-7cf1-82c5-a6838187225f_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in operating assets and liabilities:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember_terseLabel_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments, Excluding Value Reported in Compensation Table</link:label>
    <link:label id="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember_label_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:to="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_019fed4d-3d42-71ee-a944-816bb66daab0_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">STOCKHOLDERS&#8217; EQUITY</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:to="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DiamondMezzanine24LLCMember_019fed4d-3dd3-7424-8cf0-a9eec92947e3_terseLabel_en-US" xlink:label="lab_arcc_DiamondMezzanine24LLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Diamond Mezzanine 24 LLC</link:label>
    <link:label id="lab_arcc_DiamondMezzanine24LLCMember_label_en-US" xlink:label="lab_arcc_DiamondMezzanine24LLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Diamond Mezzanine 24 LLC [Member]</link:label>
    <link:label id="lab_arcc_DiamondMezzanine24LLCMember_documentation_en-US" xlink:label="lab_arcc_DiamondMezzanine24LLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Diamond Mezzanine 24 LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DiamondMezzanine24LLCMember" xlink:href="arcc-20260930.xsd#arcc_DiamondMezzanine24LLCMember"/>
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    <link:label id="lab_us-gaap_CostsAndExpensesAbstract_019fed4d-3d41-7d97-9dd4-20f417483496_terseLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expenses</link:label>
    <link:label id="lab_us-gaap_CostsAndExpensesAbstract_label_en-US" xlink:label="lab_us-gaap_CostsAndExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Costs and Expenses [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostsAndExpensesAbstract" xlink:to="lab_us-gaap_CostsAndExpensesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_SecurityExchangeName_019fed4d-3dd3-72b4-91b0-8d06fb579867_terseLabel_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Security Exchange Name</link:label>
    <link:label id="lab_dei_SecurityExchangeName_label_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Security Exchange Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SecurityExchangeName" xlink:to="lab_dei_SecurityExchangeName" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember_019fed4d-3dd3-7032-86ed-a8ee34fb920e_terseLabel_en-US" xlink:label="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Radius Aerospace, Inc. and Radius Aerospace Europe Limited</link:label>
    <link:label id="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember_label_en-US" xlink:label="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Radius Aerospace, Inc. and Radius Aerospace Europe Limited [Member]</link:label>
    <link:label id="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember_documentation_en-US" xlink:label="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Radius Aerospace, Inc. and Radius Aerospace Europe Limited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:href="arcc-20260930.xsd#arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:to="lab_arcc_RadiusAerospaceIncAndRadiusAerospaceEuropeLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SGMAcquisitionSubLLCAndSchillHoldingsLPMember_019fed4d-3d42-7bea-87e7-3efeca4c68e8_terseLabel_en-US" xlink:label="lab_arcc_SGMAcquisitionSubLLCAndSchillHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SGM Acquisition Sub, LLC and Schill Holdings, LP</link:label>
    <link:label id="lab_arcc_SGMAcquisitionSubLLCAndSchillHoldingsLPMember_label_en-US" xlink:label="lab_arcc_SGMAcquisitionSubLLCAndSchillHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SGM Acquisition Sub, LLC and Schill Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_SGMAcquisitionSubLLCAndSchillHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_SGMAcquisitionSubLLCAndSchillHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SGM Acquisition Sub, LLC and Schill Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SGMAcquisitionSubLLCAndSchillHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_SGMAcquisitionSubLLCAndSchillHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SGMAcquisitionSubLLCAndSchillHoldingsLPMember" xlink:to="lab_arcc_SGMAcquisitionSubLLCAndSchillHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SignantFinanceOneLimitedAndBracketIntermediateHoldingCorp.Member_019fed4d-3e56-737b-82da-1567550c6706_terseLabel_en-US" xlink:label="lab_arcc_SignantFinanceOneLimitedAndBracketIntermediateHoldingCorp.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Signant Finance One Limited and Bracket Intermediate Holding Corp.</link:label>
    <link:label id="lab_arcc_SignantFinanceOneLimitedAndBracketIntermediateHoldingCorp.Member_label_en-US" xlink:label="lab_arcc_SignantFinanceOneLimitedAndBracketIntermediateHoldingCorp.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Signant Finance One Limited and Bracket Intermediate Holding Corp. [Member]</link:label>
    <link:label id="lab_arcc_SignantFinanceOneLimitedAndBracketIntermediateHoldingCorp.Member_documentation_en-US" xlink:label="lab_arcc_SignantFinanceOneLimitedAndBracketIntermediateHoldingCorp.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Signant Finance One Limited and Bracket Intermediate Holding Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SignantFinanceOneLimitedAndBracketIntermediateHoldingCorp.Member" xlink:href="arcc-20260930.xsd#arcc_SignantFinanceOneLimitedAndBracketIntermediateHoldingCorp.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SignantFinanceOneLimitedAndBracketIntermediateHoldingCorp.Member" xlink:to="lab_arcc_SignantFinanceOneLimitedAndBracketIntermediateHoldingCorp.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CSTHoldingCompanyMember_019fed4d-3e56-7ea5-8ca3-4c9f97fcc0ca_terseLabel_en-US" xlink:label="lab_arcc_CSTHoldingCompanyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CST Holding Company</link:label>
    <link:label id="lab_arcc_CSTHoldingCompanyMember_label_en-US" xlink:label="lab_arcc_CSTHoldingCompanyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">CST Holding Company [Member]</link:label>
    <link:label id="lab_arcc_CSTHoldingCompanyMember_documentation_en-US" xlink:label="lab_arcc_CSTHoldingCompanyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">CST Holding Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CSTHoldingCompanyMember" xlink:href="arcc-20260930.xsd#arcc_CSTHoldingCompanyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CSTHoldingCompanyMember" xlink:to="lab_arcc_CSTHoldingCompanyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ValuationTechniqueAxis_019fed4d-3e56-754d-a8f6-ac996df5ee52_terseLabel_en-US" xlink:label="lab_us-gaap_ValuationTechniqueAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Valuation Approach and Technique [Axis]</link:label>
    <link:label id="lab_us-gaap_ValuationTechniqueAxis_label_en-US" xlink:label="lab_us-gaap_ValuationTechniqueAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Approach and Technique [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationTechniqueAxis" xlink:to="lab_us-gaap_ValuationTechniqueAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InterestRateSwap9Member_01a0ce88-36af-736a-9621-f19d0101d393_terseLabel_en-US" xlink:label="lab_arcc_InterestRateSwap9Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 9</link:label>
    <link:label id="lab_arcc_InterestRateSwap9Member_label_en-US" xlink:label="lab_arcc_InterestRateSwap9Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 9 [Member]</link:label>
    <link:label id="lab_arcc_InterestRateSwap9Member_documentation_en-US" xlink:label="lab_arcc_InterestRateSwap9Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap 9</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestRateSwap9Member" xlink:href="arcc-20260930.xsd#arcc_InterestRateSwap9Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InterestRateSwap9Member" xlink:to="lab_arcc_InterestRateSwap9Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember_019fed4d-3dd3-7968-ae15-8c32c6335f87_terseLabel_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated loan</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember_label_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P., Debt Investment [Member]</link:label>
    <link:label id="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember_documentation_en-US" xlink:label="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ivy Hill Asset Management, L.P., Debt Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:href="arcc-20260930.xsd#arcc_IvyHillAssetManagementLPDebtInvestmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:to="lab_arcc_IvyHillAssetManagementLPDebtInvestmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CommercialAndProfessionalServicesMember_019fed4d-3dd3-7263-a242-a50b7c623f4e_terseLabel_en-US" xlink:label="lab_arcc_CommercialAndProfessionalServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial and Professional Services</link:label>
    <link:label id="lab_arcc_CommercialAndProfessionalServicesMember_label_en-US" xlink:label="lab_arcc_CommercialAndProfessionalServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial And Professional Services [Member]</link:label>
    <link:label id="lab_arcc_CommercialAndProfessionalServicesMember_documentation_en-US" xlink:label="lab_arcc_CommercialAndProfessionalServicesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Commercial And Professional Services</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CommercialAndProfessionalServicesMember" xlink:href="arcc-20260930.xsd#arcc_CommercialAndProfessionalServicesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CommercialAndProfessionalServicesMember" xlink:to="lab_arcc_CommercialAndProfessionalServicesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD3Member_01a16e8e-4213-7c7b-ae31-4ad3d6985054_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, CAD 3</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD3Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD3Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, CAD 3 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractCAD3Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractCAD3Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, CAD 3</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractCAD3Member" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractCAD3Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractCAD3Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractCAD3Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_019fed4d-3dd3-78ed-9120-172eab1c4d21_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment Reporting</link:label>
    <link:label id="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingPolicyPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:to="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember_019fed4d-3d42-7179-bc20-948c4ff84ee0_terseLabel_en-US" xlink:label="lab_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cardinal Parent, Inc. and Packers Software Intermediate Holdings, Inc.</link:label>
    <link:label id="lab_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember_label_en-US" xlink:label="lab_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cardinal Parent, Inc. and Packers Software Intermediate Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cardinal Parent, Inc. and Packers Software Intermediate Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember" xlink:to="lab_arcc_CardinalParentIncAndPackersSoftwareIntermediateHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceAmountOfPremiumAddedPercent_01a17ad2-9252-7c26-9ed9-1c5f231abbe2_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceAmountOfPremiumAddedPercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Closing price, Dividend Adjusted Price, amount of premium added</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceAmountOfPremiumAddedPercent_label_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceAmountOfPremiumAddedPercent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Dividend Adjusted Price, Amount Of Premium Added, Percent</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceAmountOfPremiumAddedPercent_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceAmountOfPremiumAddedPercent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Dividend Adjusted Price, Amount Of Premium Added, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceAmountOfPremiumAddedPercent" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationClosingPriceDividendAdjustedPriceAmountOfPremiumAddedPercent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceAmountOfPremiumAddedPercent" xlink:to="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceAmountOfPremiumAddedPercent" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_OutstandingRecoveryIndName_terseLabel_en-US" xlink:label="lab_ecd_OutstandingRecoveryIndName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
    <link:label id="lab_ecd_OutstandingRecoveryIndName_label_en-US" xlink:label="lab_ecd_OutstandingRecoveryIndName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Outstanding Recovery, Individual Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingRecoveryIndName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_OutstandingRecoveryIndName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_OutstandingRecoveryIndName" xlink:to="lab_ecd_OutstandingRecoveryIndName" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LidoAdvisorsLLCAndLALGroupHoldingsLLCMember_019fed4d-3d41-740d-ad22-e20e58de486d_terseLabel_en-US" xlink:label="lab_arcc_LidoAdvisorsLLCAndLALGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lido Advisors, LLC and LAL Group Holdings, LLC,</link:label>
    <link:label id="lab_arcc_LidoAdvisorsLLCAndLALGroupHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_LidoAdvisorsLLCAndLALGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lido Advisors, LLC and LAL Group Holdings, LLC, [Member]</link:label>
    <link:label id="lab_arcc_LidoAdvisorsLLCAndLALGroupHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_LidoAdvisorsLLCAndLALGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Lido Advisors, LLC and LAL Group Holdings, LLC,</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LidoAdvisorsLLCAndLALGroupHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_LidoAdvisorsLLCAndLALGroupHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LidoAdvisorsLLCAndLALGroupHoldingsLLCMember" xlink:to="lab_arcc_LidoAdvisorsLLCAndLALGroupHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgHowMnpiCnsdrdTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing, How MNPI Considered</link:label>
    <link:label id="lab_ecd_AwardTmgHowMnpiCnsdrdTextBlock_label_en-US" xlink:label="lab_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing, How MNPI Considered [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgHowMnpiCnsdrdTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:to="lab_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IncreaseDecreaseInInterestAndFacilityFeesPayable_019fed4d-3dd3-7e86-b14d-0a3e48079c83_terseLabel_en-US" xlink:label="lab_arcc_IncreaseDecreaseInInterestAndFacilityFeesPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest and facility fees payable</link:label>
    <link:label id="lab_arcc_IncreaseDecreaseInInterestAndFacilityFeesPayable_label_en-US" xlink:label="lab_arcc_IncreaseDecreaseInInterestAndFacilityFeesPayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) In Interest And Facility Fees Payable</link:label>
    <link:label id="lab_arcc_IncreaseDecreaseInInterestAndFacilityFeesPayable_documentation_en-US" xlink:label="lab_arcc_IncreaseDecreaseInInterestAndFacilityFeesPayable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase (Decrease) In Interest And Facility Fees Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IncreaseDecreaseInInterestAndFacilityFeesPayable" xlink:href="arcc-20260930.xsd#arcc_IncreaseDecreaseInInterestAndFacilityFeesPayable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IncreaseDecreaseInInterestAndFacilityFeesPayable" xlink:to="lab_arcc_IncreaseDecreaseInInterestAndFacilityFeesPayable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions_019fed4d-3d42-7908-92e6-61acabac165e_terseLabel_en-US" xlink:label="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redemptions (cost)</link:label>
    <link:label id="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions_label_en-US" xlink:label="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments In And Advances To Affiliates, At Fair Value, Gross Reductions, Redemptions</link:label>
    <link:label id="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions_documentation_en-US" xlink:label="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investments In And Advances To Affiliates, At Fair Value, Gross Reductions, Redemptions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions" xlink:href="arcc-20260930.xsd#arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions" xlink:to="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsRedemptions" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedPercentOfTotalAssets_019fed4d-3dd3-72b2-92c6-59ebcd30caa3_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedPercentOfTotalAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">% of Total Assets</link:label>
    <link:label id="lab_arcc_InvestmentOwnedPercentOfTotalAssets_label_en-US" xlink:label="lab_arcc_InvestmentOwnedPercentOfTotalAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Percent Of Total Assets</link:label>
    <link:label id="lab_arcc_InvestmentOwnedPercentOfTotalAssets_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedPercentOfTotalAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Percent Of Total Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedPercentOfTotalAssets" xlink:href="arcc-20260930.xsd#arcc_InvestmentOwnedPercentOfTotalAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedPercentOfTotalAssets" xlink:to="lab_arcc_InvestmentOwnedPercentOfTotalAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ShoutFactoryLLCMember_019fed4d-3dd3-734f-9c04-3adc55ac85d7_terseLabel_en-US" xlink:label="lab_arcc_ShoutFactoryLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shout! Factory, LLC</link:label>
    <link:label id="lab_arcc_ShoutFactoryLLCMember_label_en-US" xlink:label="lab_arcc_ShoutFactoryLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shout! Factory, LLC [Member]</link:label>
    <link:label id="lab_arcc_ShoutFactoryLLCMember_documentation_en-US" xlink:label="lab_arcc_ShoutFactoryLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shout! Factory, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ShoutFactoryLLCMember" xlink:href="arcc-20260930.xsd#arcc_ShoutFactoryLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ShoutFactoryLLCMember" xlink:to="lab_arcc_ShoutFactoryLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MAICapitalManagementIntermediateLLCMember_019fed4d-3dd3-768e-b6c4-1fd67422e10c_terseLabel_en-US" xlink:label="lab_arcc_MAICapitalManagementIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mai Capital Management Intermediate LLC</link:label>
    <link:label id="lab_arcc_MAICapitalManagementIntermediateLLCMember_label_en-US" xlink:label="lab_arcc_MAICapitalManagementIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MAI Capital Management Intermediate LLC [Member]</link:label>
    <link:label id="lab_arcc_MAICapitalManagementIntermediateLLCMember_documentation_en-US" xlink:label="lab_arcc_MAICapitalManagementIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MAI Capital Management Intermediate LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MAICapitalManagementIntermediateLLCMember" xlink:href="arcc-20260930.xsd#arcc_MAICapitalManagementIntermediateLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MAICapitalManagementIntermediateLLCMember" xlink:to="lab_arcc_MAICapitalManagementIntermediateLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_SegmentGeographicalDomain_019fed4d-3d42-7c16-b73a-5442e71b2537_terseLabel_en-US" xlink:label="lab_srt_SegmentGeographicalDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:label id="lab_srt_SegmentGeographicalDomain_label_en-US" xlink:label="lab_srt_SegmentGeographicalDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_SegmentGeographicalDomain" xlink:to="lab_srt_SegmentGeographicalDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock_019fed4d-3dd3-7928-bd44-bd936ebaf7ce_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Dividend and Interest Income</link:label>
    <link:label id="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock_label_en-US" xlink:label="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income and Interest Expense Disclosure [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:to="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember_terseLabel_en-US" xlink:label="lab_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year</link:label>
    <link:label id="lab_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember_label_en-US" xlink:label="lab_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:to="lab_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PnsnAdjsPrrSvcCstMember_terseLabel_en-US" xlink:label="lab_ecd_PnsnAdjsPrrSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension Adjustments Prior Service Cost</link:label>
    <link:label id="lab_ecd_PnsnAdjsPrrSvcCstMember_label_en-US" xlink:label="lab_ecd_PnsnAdjsPrrSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pension Adjustments Prior Service Cost [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PnsnAdjsPrrSvcCstMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PnsnAdjsPrrSvcCstMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PnsnAdjsPrrSvcCstMember" xlink:to="lab_ecd_PnsnAdjsPrrSvcCstMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember_019fed4d-3d42-7f44-a295-515bb32f0cec_terseLabel_en-US" xlink:label="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PCIA SPV-3, LLC and ASE Royal Aggregator, LLC</link:label>
    <link:label id="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember_label_en-US" xlink:label="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PCIA SPV-3, LLC and ASE Royal Aggregator, LLC [Member]</link:label>
    <link:label id="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember_documentation_en-US" xlink:label="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PCIA SPV-3, LLC and ASE Royal Aggregator, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember" xlink:href="arcc-20260930.xsd#arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember" xlink:to="lab_arcc_PCIASPV3LLCAndASERoyalAggregatorLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfInvestmentsTable_019fed4d-3dd3-7bd1-8ebe-d06b5fb4c0bc_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Investments [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfInvestmentsTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Investments [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable" xlink:to="lab_us-gaap_ScheduleOfInvestmentsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PumpTechLLCAndImpelCVBLPMember_019fed4d-3d42-7885-811d-028d6ee81479_terseLabel_en-US" xlink:label="lab_arcc_PumpTechLLCAndImpelCVBLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PumpTech, LLC and Impel CV-B, LP</link:label>
    <link:label id="lab_arcc_PumpTechLLCAndImpelCVBLPMember_label_en-US" xlink:label="lab_arcc_PumpTechLLCAndImpelCVBLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PumpTech, LLC and Impel CV-B, LP [Member]</link:label>
    <link:label id="lab_arcc_PumpTechLLCAndImpelCVBLPMember_documentation_en-US" xlink:label="lab_arcc_PumpTechLLCAndImpelCVBLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PumpTech, LLC and Impel CV-B, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PumpTechLLCAndImpelCVBLPMember" xlink:href="arcc-20260930.xsd#arcc_PumpTechLLCAndImpelCVBLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PumpTechLLCAndImpelCVBLPMember" xlink:to="lab_arcc_PumpTechLLCAndImpelCVBLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation_019fed4d-3d41-7569-80e2-1a2a1e1b5b21_terseLabel_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized losses</link:label>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation_019fed4d-3d41-7e1d-b23b-e4135d357f46_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Unrealized losses</link:label>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation_label_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Tax Basis, Unrealized Loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" xlink:to="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PrimoWaterHoldingsIncTritonWaterHoldingsIncMember_019fed4d-3dd3-7ca6-b9a0-25b820114b6b_terseLabel_en-US" xlink:label="lab_arcc_PrimoWaterHoldingsIncTritonWaterHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Primo Water Holdings Inc / Triton Water Holdings Inc</link:label>
    <link:label id="lab_arcc_PrimoWaterHoldingsIncTritonWaterHoldingsIncMember_label_en-US" xlink:label="lab_arcc_PrimoWaterHoldingsIncTritonWaterHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Primo Water Holdings Inc / Triton Water Holdings Inc [Member]</link:label>
    <link:label id="lab_arcc_PrimoWaterHoldingsIncTritonWaterHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_PrimoWaterHoldingsIncTritonWaterHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Primo Water Holdings Inc / Triton Water Holdings Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PrimoWaterHoldingsIncTritonWaterHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_PrimoWaterHoldingsIncTritonWaterHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PrimoWaterHoldingsIncTritonWaterHoldingsIncMember" xlink:to="lab_arcc_PrimoWaterHoldingsIncTritonWaterHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ACPAvenuMidcoLLCMember_019fed4d-3d42-7c05-8555-772af4da0dbb_terseLabel_en-US" xlink:label="lab_arcc_ACPAvenuMidcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ACP Avenu Midco LLC</link:label>
    <link:label id="lab_arcc_ACPAvenuMidcoLLCMember_label_en-US" xlink:label="lab_arcc_ACPAvenuMidcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ACP Avenu Midco LLC [Member]</link:label>
    <link:label id="lab_arcc_ACPAvenuMidcoLLCMember_documentation_en-US" xlink:label="lab_arcc_ACPAvenuMidcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ACP Avenu Midco LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ACPAvenuMidcoLLCMember" xlink:href="arcc-20260930.xsd#arcc_ACPAvenuMidcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ACPAvenuMidcoLLCMember" xlink:to="lab_arcc_ACPAvenuMidcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_UnrealizedGainLossOnDerivatives_019fed4d-3dd3-7b20-9c3c-50573e737c68_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivatives" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net (gain) loss on interest rate swaps accounted for as hedge instruments and the related hedged items</link:label>
    <link:label id="lab_us-gaap_UnrealizedGainLossOnDerivatives_019fed4d-3dd3-7517-a630-8625e6f3f416_verboseLabel_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivatives" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gains (losses) from foreign currency and other transactions</link:label>
    <link:label id="lab_us-gaap_UnrealizedGainLossOnDerivatives_label_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivatives" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain (Loss) on Derivatives</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrealizedGainLossOnDerivatives"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossOnDerivatives" xlink:to="lab_us-gaap_UnrealizedGainLossOnDerivatives" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ScheduleForFinancialSupportForNonconsolidatedEntityTableTextBlock_019fed4d-3d42-7707-a5fb-3de6f8d58f30_terseLabel_en-US" xlink:label="lab_arcc_ScheduleForFinancialSupportForNonconsolidatedEntityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Loan and Private Equity Commitments</link:label>
    <link:label id="lab_arcc_ScheduleForFinancialSupportForNonconsolidatedEntityTableTextBlock_label_en-US" xlink:label="lab_arcc_ScheduleForFinancialSupportForNonconsolidatedEntityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule For Financial Support For Nonconsolidated Entity [Table Text Block]</link:label>
    <link:label id="lab_arcc_ScheduleForFinancialSupportForNonconsolidatedEntityTableTextBlock_documentation_en-US" xlink:label="lab_arcc_ScheduleForFinancialSupportForNonconsolidatedEntityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule For Financial Support For Nonconsolidated Entity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ScheduleForFinancialSupportForNonconsolidatedEntityTableTextBlock" xlink:href="arcc-20260930.xsd#arcc_ScheduleForFinancialSupportForNonconsolidatedEntityTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ScheduleForFinancialSupportForNonconsolidatedEntityTableTextBlock" xlink:to="lab_arcc_ScheduleForFinancialSupportForNonconsolidatedEntityTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_019fed4d-3d41-730f-b934-d9e48769462c_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Principal amount of debt outstanding</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_019fed4d-3d41-724b-8f4f-d2462533ea86_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Principal Amount Outstanding</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Gross</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount" xlink:to="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_KingRiskPartnersLLCMember_01a15d80-627d-739c-99f1-59cf382cd567_terseLabel_en-US" xlink:label="lab_arcc_KingRiskPartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">King Risk Partners, LLC</link:label>
    <link:label id="lab_arcc_KingRiskPartnersLLCMember_label_en-US" xlink:label="lab_arcc_KingRiskPartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">King Risk Partners, LLC [Member]</link:label>
    <link:label id="lab_arcc_KingRiskPartnersLLCMember_documentation_en-US" xlink:label="lab_arcc_KingRiskPartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">King Risk Partners, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KingRiskPartnersLLCMember" xlink:href="arcc-20260930.xsd#arcc_KingRiskPartnersLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KingRiskPartnersLLCMember" xlink:to="lab_arcc_KingRiskPartnersLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_XIFINIncAndACPChargerCoInvestLLCMember_019fed4d-3dd3-7d9b-8c3c-4eb5434ba52f_terseLabel_en-US" xlink:label="lab_arcc_XIFINIncAndACPChargerCoInvestLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">XIFIN, Inc. and ACP Charger Co-Invest LLC</link:label>
    <link:label id="lab_arcc_XIFINIncAndACPChargerCoInvestLLCMember_label_en-US" xlink:label="lab_arcc_XIFINIncAndACPChargerCoInvestLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">XIFIN, Inc. and ACP Charger Co-Invest LLC [Member]</link:label>
    <link:label id="lab_arcc_XIFINIncAndACPChargerCoInvestLLCMember_documentation_en-US" xlink:label="lab_arcc_XIFINIncAndACPChargerCoInvestLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">XIFIN, Inc. and ACP Charger Co-Invest LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_XIFINIncAndACPChargerCoInvestLLCMember" xlink:href="arcc-20260930.xsd#arcc_XIFINIncAndACPChargerCoInvestLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_XIFINIncAndACPChargerCoInvestLLCMember" xlink:to="lab_arcc_XIFINIncAndACPChargerCoInvestLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ELMDebtCoLLCMember_019fed4d-3e56-7f51-ac80-740521c36017_terseLabel_en-US" xlink:label="lab_arcc_ELMDebtCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ELM DebtCo, LLC</link:label>
    <link:label id="lab_arcc_ELMDebtCoLLCMember_label_en-US" xlink:label="lab_arcc_ELMDebtCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ELM DebtCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_ELMDebtCoLLCMember_documentation_en-US" xlink:label="lab_arcc_ELMDebtCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ELM DebtCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ELMDebtCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_ELMDebtCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ELMDebtCoLLCMember" xlink:to="lab_arcc_ELMDebtCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RelatedPartyTransactionsAbstract_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transactions [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsAbstract" xlink:to="lab_us-gaap_RelatedPartyTransactionsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtPolicyTextBlock_019fed4d-3d42-7395-8668-fbc6cf7c3fa2_terseLabel_en-US" xlink:label="lab_us-gaap_DebtPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Issuance Costs</link:label>
    <link:label id="lab_us-gaap_DebtPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_DebtPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtPolicyTextBlock" xlink:to="lab_us-gaap_DebtPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember_019fed4d-3d42-721c-988d-07c4c58ed5cf_terseLabel_en-US" xlink:label="lab_arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC</link:label>
    <link:label id="lab_arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PDI TA Holdings, Inc., Peachtree Parent, Inc. and Insight PDI Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember" xlink:to="lab_arcc_PDITAHoldingsIncPeachtreeParentIncAndInsightPDIHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_OutstandingRecoveryCompAmt_terseLabel_en-US" xlink:label="lab_ecd_OutstandingRecoveryCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation Amount</link:label>
    <link:label id="lab_ecd_OutstandingRecoveryCompAmt_label_en-US" xlink:label="lab_ecd_OutstandingRecoveryCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Outstanding Recovery Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingRecoveryCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_OutstandingRecoveryCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_OutstandingRecoveryCompAmt" xlink:to="lab_ecd_OutstandingRecoveryCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DebtSecuritiesSecondLienSeniorSecuredLoansMember_019fed4d-3d42-74fc-a69d-7bc4fc4a0789_terseLabel_en-US" xlink:label="lab_arcc_DebtSecuritiesSecondLienSeniorSecuredLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Second lien senior secured loans</link:label>
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    <link:label id="lab_arcc_DebtSecuritiesSecondLienSeniorSecuredLoansMember_documentation_en-US" xlink:label="lab_arcc_DebtSecuritiesSecondLienSeniorSecuredLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Securities, Second Lien Senior Secured Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DebtSecuritiesSecondLienSeniorSecuredLoansMember" xlink:href="arcc-20260930.xsd#arcc_DebtSecuritiesSecondLienSeniorSecuredLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DebtSecuritiesSecondLienSeniorSecuredLoansMember" xlink:to="lab_arcc_DebtSecuritiesSecondLienSeniorSecuredLoansMember" xlink:type="arc" order="1"/>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters" xlink:to="lab_arcc_InvestmentCompanyBaseManagementFeeCalculationNumberOfQuarters" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_IndividualAxis_terseLabel_en-US" xlink:label="lab_ecd_IndividualAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Individual:</link:label>
    <link:label id="lab_ecd_IndividualAxis_label_en-US" xlink:label="lab_ecd_IndividualAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Individual [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_IndividualAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_IndividualAxis"/>
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    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019fed4d-3d42-7b9d-b57b-9f209d97d6fc_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Diluted weighted average shares of common stock outstanding (in shares)</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Diluted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_019fed4d-3dd3-725f-a377-d903dfa04a18_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_label_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityEmergingGrowthCompany" xlink:to="lab_dei_EntityEmergingGrowthCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_019fed4d-3dd3-744d-a696-14554076acd6_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Line Items]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems" xlink:to="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativesPolicyTextBlock_019fed4d-3dd3-7a17-8dfc-b1ea65139e9c_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativesPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments</link:label>
    <link:label id="lab_us-gaap_DerivativesPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_DerivativesPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivatives, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativesPolicyTextBlock" xlink:to="lab_us-gaap_DerivativesPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_UndrlygSecurityMktPriceChngPct_terseLabel_en-US" xlink:label="lab_ecd_UndrlygSecurityMktPriceChngPct" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Underlying Security Market Price Change</link:label>
    <link:label id="lab_ecd_UndrlygSecurityMktPriceChngPct_label_en-US" xlink:label="lab_ecd_UndrlygSecurityMktPriceChngPct" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Underlying Security Market Price Change, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_UndrlygSecurityMktPriceChngPct" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_UndrlygSecurityMktPriceChngPct"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_UndrlygSecurityMktPriceChngPct" xlink:to="lab_ecd_UndrlygSecurityMktPriceChngPct" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BanyanSoftwareHoldingsLLCAndBanyanSoftwareIntermediateInc.Member_019fed4d-3dd3-7d9a-a91d-f8edbe4b8650_terseLabel_en-US" xlink:label="lab_arcc_BanyanSoftwareHoldingsLLCAndBanyanSoftwareIntermediateInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Banyan Software Holdings, LLC and Banyan Software Intermediate, Inc.</link:label>
    <link:label id="lab_arcc_BanyanSoftwareHoldingsLLCAndBanyanSoftwareIntermediateInc.Member_label_en-US" xlink:label="lab_arcc_BanyanSoftwareHoldingsLLCAndBanyanSoftwareIntermediateInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Banyan Software Holdings, LLC and Banyan Software Intermediate, Inc. [Member]</link:label>
    <link:label id="lab_arcc_BanyanSoftwareHoldingsLLCAndBanyanSoftwareIntermediateInc.Member_documentation_en-US" xlink:label="lab_arcc_BanyanSoftwareHoldingsLLCAndBanyanSoftwareIntermediateInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Banyan Software Holdings, LLC and Banyan Software Intermediate, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BanyanSoftwareHoldingsLLCAndBanyanSoftwareIntermediateInc.Member" xlink:href="arcc-20260930.xsd#arcc_BanyanSoftwareHoldingsLLCAndBanyanSoftwareIntermediateInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BanyanSoftwareHoldingsLLCAndBanyanSoftwareIntermediateInc.Member" xlink:to="lab_arcc_BanyanSoftwareHoldingsLLCAndBanyanSoftwareIntermediateInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommercialPaperMember_019fed4d-3e56-7b9e-9230-261c72b0fb63_terseLabel_en-US" xlink:label="lab_us-gaap_CommercialPaperMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial Paper</link:label>
    <link:label id="lab_us-gaap_CommercialPaperMember_label_en-US" xlink:label="lab_us-gaap_CommercialPaperMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial Paper [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommercialPaperMember" xlink:to="lab_us-gaap_CommercialPaperMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_019fed4d-3e56-7ea5-8852-35f3654ff66b_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DERIVATIVE INSTRUMENTS</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock"/>
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    <link:label id="lab_arcc_PhoenixOperatingLLCMember_019fed4d-3dd3-70f6-ba84-fb2a849dde4e_terseLabel_en-US" xlink:label="lab_arcc_PhoenixOperatingLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Phoenix Operating LLC</link:label>
    <link:label id="lab_arcc_PhoenixOperatingLLCMember_label_en-US" xlink:label="lab_arcc_PhoenixOperatingLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Phoenix Operating LLC [Member]</link:label>
    <link:label id="lab_arcc_PhoenixOperatingLLCMember_documentation_en-US" xlink:label="lab_arcc_PhoenixOperatingLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Phoenix Operating LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PhoenixOperatingLLCMember" xlink:href="arcc-20260930.xsd#arcc_PhoenixOperatingLLCMember"/>
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    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_019fed4d-3dd3-71c2-b81e-96666eb2566a_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Gross Amount of Recognized Liabilities</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Subject to Master Netting Arrangement, before Offset</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NelipakHoldingCompanyNelipakEuropeanHoldingsCooperatiefUAKNPAKHoldingsLPAndPAKNKNetherlandsTreasuryBVMember_019fed4d-3d42-7925-afd9-9e161f431ddf_terseLabel_en-US" xlink:label="lab_arcc_NelipakHoldingCompanyNelipakEuropeanHoldingsCooperatiefUAKNPAKHoldingsLPAndPAKNKNetherlandsTreasuryBVMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nelipak Holding Company, Nelipak European Holdings Cooperatief U.A., KNPAK Holdings, LP and PAKNK Netherlands Treasury B.V.</link:label>
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    <link:label id="lab_arcc_NelipakHoldingCompanyNelipakEuropeanHoldingsCooperatiefUAKNPAKHoldingsLPAndPAKNKNetherlandsTreasuryBVMember_documentation_en-US" xlink:label="lab_arcc_NelipakHoldingCompanyNelipakEuropeanHoldingsCooperatiefUAKNPAKHoldingsLPAndPAKNKNetherlandsTreasuryBVMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Nelipak Holding Company, Nelipak European Holdings Cooperatief U.A., KNPAK Holdings, LP and PAKNK Netherlands Treasury B.V.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NelipakHoldingCompanyNelipakEuropeanHoldingsCooperatiefUAKNPAKHoldingsLPAndPAKNKNetherlandsTreasuryBVMember" xlink:href="arcc-20260930.xsd#arcc_NelipakHoldingCompanyNelipakEuropeanHoldingsCooperatiefUAKNPAKHoldingsLPAndPAKNKNetherlandsTreasuryBVMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NelipakHoldingCompanyNelipakEuropeanHoldingsCooperatiefUAKNPAKHoldingsLPAndPAKNKNetherlandsTreasuryBVMember" xlink:to="lab_arcc_NelipakHoldingCompanyNelipakEuropeanHoldingsCooperatiefUAKNPAKHoldingsLPAndPAKNKNetherlandsTreasuryBVMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AventineIntermediateLLCAventineHoldingsIILLCMember_019fed4d-3e56-7009-b818-0c499c14cec2_terseLabel_en-US" xlink:label="lab_arcc_AventineIntermediateLLCAventineHoldingsIILLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aventine Intermediate LLC &amp; Aventine Holdings II LLC</link:label>
    <link:label id="lab_arcc_AventineIntermediateLLCAventineHoldingsIILLCMember_label_en-US" xlink:label="lab_arcc_AventineIntermediateLLCAventineHoldingsIILLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aventine Intermediate LLC &amp; Aventine Holdings II LLC [Member]</link:label>
    <link:label id="lab_arcc_AventineIntermediateLLCAventineHoldingsIILLCMember_documentation_en-US" xlink:label="lab_arcc_AventineIntermediateLLCAventineHoldingsIILLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Aventine Intermediate LLC &amp; Aventine Holdings II LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AventineIntermediateLLCAventineHoldingsIILLCMember" xlink:href="arcc-20260930.xsd#arcc_AventineIntermediateLLCAventineHoldingsIILLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AventineIntermediateLLCAventineHoldingsIILLCMember" xlink:to="lab_arcc_AventineIntermediateLLCAventineHoldingsIILLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember_019fed4d-3dd3-7baf-bb31-52631493c2f3_terseLabel_en-US" xlink:label="lab_arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CMG HoldCo, LLC and CMG Buyer Holdings, Inc.</link:label>
    <link:label id="lab_arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember_label_en-US" xlink:label="lab_arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">CMG HoldCo, LLC and CMG Buyer Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">CMG HoldCo, LLC and CMG Buyer Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember" xlink:to="lab_arcc_CMGHoldCoLLCAndCMGBuyerHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_Chess.comLLCAndSquaresAggregatorLPMember_01a15852-500d-761a-92ed-c90a92c43851_terseLabel_en-US" xlink:label="lab_arcc_Chess.comLLCAndSquaresAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Chess.com LLC and Squares Aggregator, LP</link:label>
    <link:label id="lab_arcc_Chess.comLLCAndSquaresAggregatorLPMember_label_en-US" xlink:label="lab_arcc_Chess.comLLCAndSquaresAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Chess.com LLC and Squares Aggregator, LP [Member]</link:label>
    <link:label id="lab_arcc_Chess.comLLCAndSquaresAggregatorLPMember_documentation_en-US" xlink:label="lab_arcc_Chess.comLLCAndSquaresAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Chess.com LLC and Squares Aggregator, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_Chess.comLLCAndSquaresAggregatorLPMember" xlink:href="arcc-20260930.xsd#arcc_Chess.comLLCAndSquaresAggregatorLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_Chess.comLLCAndSquaresAggregatorLPMember" xlink:to="lab_arcc_Chess.comLLCAndSquaresAggregatorLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AccommodationsPlusTechnologiesLLCMember_019fed4d-3dd3-7f6c-b961-d1ae59de2fe3_terseLabel_en-US" xlink:label="lab_arcc_AccommodationsPlusTechnologiesLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accommodations Plus Technologies LLC</link:label>
    <link:label id="lab_arcc_AccommodationsPlusTechnologiesLLCMember_label_en-US" xlink:label="lab_arcc_AccommodationsPlusTechnologiesLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accommodations Plus Technologies LLC [Member]</link:label>
    <link:label id="lab_arcc_AccommodationsPlusTechnologiesLLCMember_documentation_en-US" xlink:label="lab_arcc_AccommodationsPlusTechnologiesLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accommodations Plus Technologies LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AccommodationsPlusTechnologiesLLCMember" xlink:href="arcc-20260930.xsd#arcc_AccommodationsPlusTechnologiesLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AccommodationsPlusTechnologiesLLCMember" xlink:to="lab_arcc_AccommodationsPlusTechnologiesLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember_019fed4d-3d42-75c0-8035-75c7f9cf1e25_terseLabel_en-US" xlink:label="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">eResearch Technology, Inc. and Astorg VII Co-Invest ERT</link:label>
    <link:label id="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember_label_en-US" xlink:label="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">eResearch Technology, Inc. and Astorg VII Co-Invest ERT [Member]</link:label>
    <link:label id="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember_documentation_en-US" xlink:label="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">eResearch Technology, Inc. and Astorg VII Co-Invest ERT</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:href="arcc-20260930.xsd#arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:to="lab_arcc_EResearchTechnologyIncAndAstorgVIICoInvestERTMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BirdieBidcoInc.Member_019fed4d-3e56-7a75-bcc6-89c3780b137b_terseLabel_en-US" xlink:label="lab_arcc_BirdieBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Birdie Bidco, Inc.</link:label>
    <link:label id="lab_arcc_BirdieBidcoInc.Member_label_en-US" xlink:label="lab_arcc_BirdieBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Birdie Bidco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_BirdieBidcoInc.Member_documentation_en-US" xlink:label="lab_arcc_BirdieBidcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Birdie Bidco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BirdieBidcoInc.Member" xlink:href="arcc-20260930.xsd#arcc_BirdieBidcoInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BirdieBidcoInc.Member" xlink:to="lab_arcc_BirdieBidcoInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_March2032NotesMember_019fed4d-3dd3-7e8e-b934-f3c8cfef7acd_terseLabel_en-US" xlink:label="lab_arcc_March2032NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">March 2032 Notes</link:label>
    <link:label id="lab_arcc_March2032NotesMember_019fed4d-3dd3-7cdb-8b2c-09984648840b_verboseLabel_en-US" xlink:label="lab_arcc_March2032NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">March 2032 Notes (principal amount outstanding of $1,000)</link:label>
    <link:label id="lab_arcc_March2032NotesMember_label_en-US" xlink:label="lab_arcc_March2032NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">March 2032 Notes [Member]</link:label>
    <link:label id="lab_arcc_March2032NotesMember_documentation_en-US" xlink:label="lab_arcc_March2032NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">March 2032 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_March2032NotesMember" xlink:href="arcc-20260930.xsd#arcc_March2032NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_March2032NotesMember" xlink:to="lab_arcc_March2032NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_JAMSHoldingsLPAndJamsBuyerLLCMember_019fed4d-3e56-7648-91aa-611c142fb779_terseLabel_en-US" xlink:label="lab_arcc_JAMSHoldingsLPAndJamsBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">JAMS Holdings LP and Jams Buyer LLC</link:label>
    <link:label id="lab_arcc_JAMSHoldingsLPAndJamsBuyerLLCMember_label_en-US" xlink:label="lab_arcc_JAMSHoldingsLPAndJamsBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">JAMS Holdings LP and Jams Buyer LLC [Member]</link:label>
    <link:label id="lab_arcc_JAMSHoldingsLPAndJamsBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_JAMSHoldingsLPAndJamsBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">JAMS Holdings LP and Jams Buyer LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_JAMSHoldingsLPAndJamsBuyerLLCMember" xlink:href="arcc-20260930.xsd#arcc_JAMSHoldingsLPAndJamsBuyerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_JAMSHoldingsLPAndJamsBuyerLLCMember" xlink:to="lab_arcc_JAMSHoldingsLPAndJamsBuyerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BrightStarGroupHoldingsInc.Member_019fed4d-3d42-7939-8bdb-8847b961bd1b_terseLabel_en-US" xlink:label="lab_arcc_BrightStarGroupHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BrightStar Group Holdings, Inc.</link:label>
    <link:label id="lab_arcc_BrightStarGroupHoldingsInc.Member_label_en-US" xlink:label="lab_arcc_BrightStarGroupHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BrightStar Group Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_BrightStarGroupHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_BrightStarGroupHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BrightStar Group Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BrightStarGroupHoldingsInc.Member" xlink:href="arcc-20260930.xsd#arcc_BrightStarGroupHoldingsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BrightStarGroupHoldingsInc.Member" xlink:to="lab_arcc_BrightStarGroupHoldingsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LettersOfCreditOutstandingAmount_019fed4d-3d42-7c70-b1ae-089a50f5ce95_terseLabel_en-US" xlink:label="lab_us-gaap_LettersOfCreditOutstandingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letters of credit outstanding, amount</link:label>
    <link:label id="lab_us-gaap_LettersOfCreditOutstandingAmount_label_en-US" xlink:label="lab_us-gaap_LettersOfCreditOutstandingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letters of Credit Outstanding, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LettersOfCreditOutstandingAmount" xlink:to="lab_us-gaap_LettersOfCreditOutstandingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember_019fed4d-3dd3-75b6-b938-4a4f2111582a_terseLabel_en-US" xlink:label="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premise Health Holding Corp. and OMERS Bluejay Investment Holdings LP</link:label>
    <link:label id="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember_label_en-US" xlink:label="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premise Health Holding Corp. and OMERS Bluejay Investment Holdings LP [Member]</link:label>
    <link:label id="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Premise Health Holding Corp. and OMERS Bluejay Investment Holdings LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:to="lab_arcc_PremiseHealthHoldingCorpAndOMERSBluejayInvestmentHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BCTOIgnitionPurchaserInc.Member_019fed4d-3e56-79a9-9997-cb5781269dff_terseLabel_en-US" xlink:label="lab_arcc_BCTOIgnitionPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BCTO Ignition Purchaser, Inc.</link:label>
    <link:label id="lab_arcc_BCTOIgnitionPurchaserInc.Member_label_en-US" xlink:label="lab_arcc_BCTOIgnitionPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BCTO Ignition Purchaser, Inc. [Member]</link:label>
    <link:label id="lab_arcc_BCTOIgnitionPurchaserInc.Member_documentation_en-US" xlink:label="lab_arcc_BCTOIgnitionPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BCTO Ignition Purchaser, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BCTOIgnitionPurchaserInc.Member" xlink:href="arcc-20260930.xsd#arcc_BCTOIgnitionPurchaserInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BCTOIgnitionPurchaserInc.Member" xlink:to="lab_arcc_BCTOIgnitionPurchaserInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TCPHawkerIntermediateLLCMember_019fed4d-3e56-70db-9eec-db64af126aac_terseLabel_en-US" xlink:label="lab_arcc_TCPHawkerIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TCP Hawker Intermediate LLC</link:label>
    <link:label id="lab_arcc_TCPHawkerIntermediateLLCMember_label_en-US" xlink:label="lab_arcc_TCPHawkerIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TCP Hawker Intermediate LLC [Member]</link:label>
    <link:label id="lab_arcc_TCPHawkerIntermediateLLCMember_documentation_en-US" xlink:label="lab_arcc_TCPHawkerIntermediateLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TCP Hawker Intermediate LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TCPHawkerIntermediateLLCMember" xlink:href="arcc-20260930.xsd#arcc_TCPHawkerIntermediateLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TCPHawkerIntermediateLLCMember" xlink:to="lab_arcc_TCPHawkerIntermediateLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HPRSSBuyerInc.Member_019fed4d-3e56-77bd-b1bb-4e878c10d053_terseLabel_en-US" xlink:label="lab_arcc_HPRSSBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HP RSS Buyer, Inc.</link:label>
    <link:label id="lab_arcc_HPRSSBuyerInc.Member_label_en-US" xlink:label="lab_arcc_HPRSSBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HP RSS Buyer, Inc. [Member]</link:label>
    <link:label id="lab_arcc_HPRSSBuyerInc.Member_documentation_en-US" xlink:label="lab_arcc_HPRSSBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">HP RSS Buyer, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HPRSSBuyerInc.Member" xlink:href="arcc-20260930.xsd#arcc_HPRSSBuyerInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HPRSSBuyerInc.Member" xlink:to="lab_arcc_HPRSSBuyerInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EvolentHealthLLCAndEvolentHealthInc.Member_019fed4d-3e55-77da-9405-4c79a2fe75a9_terseLabel_en-US" xlink:label="lab_arcc_EvolentHealthLLCAndEvolentHealthInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Evolent Health LLC and Evolent Health, Inc.</link:label>
    <link:label id="lab_arcc_EvolentHealthLLCAndEvolentHealthInc.Member_label_en-US" xlink:label="lab_arcc_EvolentHealthLLCAndEvolentHealthInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Evolent Health LLC and Evolent Health, Inc. [Member]</link:label>
    <link:label id="lab_arcc_EvolentHealthLLCAndEvolentHealthInc.Member_documentation_en-US" xlink:label="lab_arcc_EvolentHealthLLCAndEvolentHealthInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Evolent Health LLC and Evolent Health, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EvolentHealthLLCAndEvolentHealthInc.Member" xlink:href="arcc-20260930.xsd#arcc_EvolentHealthLLCAndEvolentHealthInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EvolentHealthLLCAndEvolentHealthInc.Member" xlink:to="lab_arcc_EvolentHealthLLCAndEvolentHealthInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ElemicaInc.AndEZElemicaHoldingsInc.Member_019fed4d-3e56-7daa-b92d-793840fe3c6c_terseLabel_en-US" xlink:label="lab_arcc_ElemicaInc.AndEZElemicaHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Elemica, Inc. and EZ Elemica Holdings, Inc.</link:label>
    <link:label id="lab_arcc_ElemicaInc.AndEZElemicaHoldingsInc.Member_label_en-US" xlink:label="lab_arcc_ElemicaInc.AndEZElemicaHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Elemica, Inc. and EZ Elemica Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ElemicaInc.AndEZElemicaHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_ElemicaInc.AndEZElemicaHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Elemica, Inc. and EZ Elemica Holdings, Inc.</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ElemicaInc.AndEZElemicaHoldingsInc.Member" xlink:to="lab_arcc_ElemicaInc.AndEZElemicaHoldingsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_label_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeAssetNotionalAmount_019fed4d-3e56-7d73-9927-909128dd2b17_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Notional Amount to be sold</link:label>
    <link:label id="lab_us-gaap_DerivativeAssetNotionalAmount_label_en-US" xlink:label="lab_us-gaap_DerivativeAssetNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Notional Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetNotionalAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetNotionalAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssetNotionalAmount" xlink:to="lab_us-gaap_DerivativeAssetNotionalAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherCommitmentsTableTextBlock_019fed4d-3d42-7820-baca-1bd428b5a2d9_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Funded Capital and Unfunded Capital Commitments of the SDLP</link:label>
    <link:label id="lab_us-gaap_OtherCommitmentsTableTextBlock_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Commitments [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherCommitmentsTableTextBlock" xlink:to="lab_us-gaap_OtherCommitmentsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialHighlightsLineItems_019fed4d-3d42-73d3-b877-c22c3dfd213f_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Highlights [Line Items]</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialHighlightsLineItems_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Highlights [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyFinancialHighlightsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="lab_us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateNetAssetsForDeferralOfCashPaymentsMember_019fed4d-3dd3-7900-8bf9-b8c154427f11_terseLabel_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateNetAssetsForDeferralOfCashPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incentive Rate, Net Assets For Deferral Of Cash Payments</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateNetAssetsForDeferralOfCashPaymentsMember_label_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateNetAssetsForDeferralOfCashPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Net Assets For Deferral Of Cash Payments [Member]</link:label>
    <link:label id="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateNetAssetsForDeferralOfCashPaymentsMember_documentation_en-US" xlink:label="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateNetAssetsForDeferralOfCashPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Advisory And Management Agreement - Incentive Rate, Net Assets For Deferral Of Cash Payments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateNetAssetsForDeferralOfCashPaymentsMember" xlink:href="arcc-20260930.xsd#arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateNetAssetsForDeferralOfCashPaymentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateNetAssetsForDeferralOfCashPaymentsMember" xlink:to="lab_arcc_InvestmentAdvisoryAndManagementAgreementIncentiveRateNetAssetsForDeferralOfCashPaymentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MarconeYellowstoneBuyerIncAndMarconeYellowstoneHoldingsLLCMember_019fed4d-3e56-788c-904c-c1bfedc6fc8f_terseLabel_en-US" xlink:label="lab_arcc_MarconeYellowstoneBuyerIncAndMarconeYellowstoneHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Marcone Yellowstone Buyer Inc. and Marcone Yellowstone Holdings, LLC</link:label>
    <link:label id="lab_arcc_MarconeYellowstoneBuyerIncAndMarconeYellowstoneHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_MarconeYellowstoneBuyerIncAndMarconeYellowstoneHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Marcone Yellowstone Buyer Inc. and Marcone Yellowstone Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_MarconeYellowstoneBuyerIncAndMarconeYellowstoneHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_MarconeYellowstoneBuyerIncAndMarconeYellowstoneHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Marcone Yellowstone Buyer Inc. and Marcone Yellowstone Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MarconeYellowstoneBuyerIncAndMarconeYellowstoneHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_MarconeYellowstoneBuyerIncAndMarconeYellowstoneHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MarconeYellowstoneBuyerIncAndMarconeYellowstoneHoldingsLLCMember" xlink:to="lab_arcc_MarconeYellowstoneBuyerIncAndMarconeYellowstoneHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio_019fed4d-3d41-7104-a9d5-d59d5f53b26b_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ratio of net investment income to average net assets</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Investment Income (Loss) Ratio</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossRatio"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:to="lab_us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncentiveFeeExpenseIncomeBased_019fed4d-3dd3-7aa1-be98-d255e20c19ad_terseLabel_en-US" xlink:label="lab_us-gaap_IncentiveFeeExpenseIncomeBased" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income based fee</link:label>
    <link:label id="lab_us-gaap_IncentiveFeeExpenseIncomeBased_019fed4d-3dd3-764c-9d12-a730536048e9_verboseLabel_en-US" xlink:label="lab_us-gaap_IncentiveFeeExpenseIncomeBased" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Income based fee</link:label>
    <link:label id="lab_us-gaap_IncentiveFeeExpenseIncomeBased_label_en-US" xlink:label="lab_us-gaap_IncentiveFeeExpenseIncomeBased" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Incentive Fee Expense, Income-Based</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncentiveFeeExpenseIncomeBased" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncentiveFeeExpenseIncomeBased"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncentiveFeeExpenseIncomeBased" xlink:to="lab_us-gaap_IncentiveFeeExpenseIncomeBased" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AllExecutiveCategoriesMember_terseLabel_en-US" xlink:label="lab_ecd_AllExecutiveCategoriesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Executive Categories</link:label>
    <link:label id="lab_ecd_AllExecutiveCategoriesMember_label_en-US" xlink:label="lab_ecd_AllExecutiveCategoriesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Executive Categories [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllExecutiveCategoriesMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllExecutiveCategoriesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AllExecutiveCategoriesMember" xlink:to="lab_ecd_AllExecutiveCategoriesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ValuationTechniqueDomain_019fed4d-3e56-7e60-837c-c7c0c6fc5b68_terseLabel_en-US" xlink:label="lab_us-gaap_ValuationTechniqueDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Valuation Approach and Technique [Domain]</link:label>
    <link:label id="lab_us-gaap_ValuationTechniqueDomain_label_en-US" xlink:label="lab_us-gaap_ValuationTechniqueDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Approach and Technique [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationTechniqueDomain" xlink:to="lab_us-gaap_ValuationTechniqueDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PnsnAdjsSvcCstMember_terseLabel_en-US" xlink:label="lab_ecd_PnsnAdjsSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension Adjustments Service Cost</link:label>
    <link:label id="lab_ecd_PnsnAdjsSvcCstMember_label_en-US" xlink:label="lab_ecd_PnsnAdjsSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pension Adjustments Service Cost [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PnsnAdjsSvcCstMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PnsnAdjsSvcCstMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PnsnAdjsSvcCstMember" xlink:to="lab_ecd_PnsnAdjsSvcCstMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyNetAdjustedUnfundedCommitmentsIncludingRoundingAdjustments_019fed4d-3e56-79eb-b993-4e9cfe290342_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyNetAdjustedUnfundedCommitmentsIncludingRoundingAdjustments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total net unfunded revolving and delayed draw loan commitments</link:label>
    <link:label id="lab_arcc_InvestmentCompanyNetAdjustedUnfundedCommitmentsIncludingRoundingAdjustments_label_en-US" xlink:label="lab_arcc_InvestmentCompanyNetAdjustedUnfundedCommitmentsIncludingRoundingAdjustments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Net Adjusted Unfunded Commitments, Including Rounding Adjustments</link:label>
    <link:label id="lab_arcc_InvestmentCompanyNetAdjustedUnfundedCommitmentsIncludingRoundingAdjustments_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyNetAdjustedUnfundedCommitmentsIncludingRoundingAdjustments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Net Adjusted Unfunded Commitments, Including Rounding Adjustments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyNetAdjustedUnfundedCommitmentsIncludingRoundingAdjustments" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyNetAdjustedUnfundedCommitmentsIncludingRoundingAdjustments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyNetAdjustedUnfundedCommitmentsIncludingRoundingAdjustments" xlink:to="lab_arcc_InvestmentCompanyNetAdjustedUnfundedCommitmentsIncludingRoundingAdjustments" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeeAmount_019fed4d-3d41-75b1-a100-4b18be61949e_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit facility fees</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeeAmount_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Commitment Fee Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:to="lab_us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TempusLabsIncMember_019fed4d-3dd3-7034-b4b7-4dbd4dacf61b_terseLabel_en-US" xlink:label="lab_arcc_TempusLabsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tempus Labs, Inc.</link:label>
    <link:label id="lab_arcc_TempusLabsIncMember_label_en-US" xlink:label="lab_arcc_TempusLabsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tempus Labs, Inc. [Member]</link:label>
    <link:label id="lab_arcc_TempusLabsIncMember_documentation_en-US" xlink:label="lab_arcc_TempusLabsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tempus Labs, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TempusLabsIncMember" xlink:href="arcc-20260930.xsd#arcc_TempusLabsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TempusLabsIncMember" xlink:to="lab_arcc_TempusLabsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RDHoldcoIncMember_019fed4d-3e56-7743-bac4-22d834fd9b47_terseLabel_en-US" xlink:label="lab_arcc_RDHoldcoIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">RD Holdco Inc.</link:label>
    <link:label id="lab_arcc_RDHoldcoIncMember_label_en-US" xlink:label="lab_arcc_RDHoldcoIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">RD Holdco Inc. [Member]</link:label>
    <link:label id="lab_arcc_RDHoldcoIncMember_documentation_en-US" xlink:label="lab_arcc_RDHoldcoIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">RD Holdco Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RDHoldcoIncMember" xlink:href="arcc-20260930.xsd#arcc_RDHoldcoIncMember"/>
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    <link:label id="lab_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio_019fed4d-3d42-797d-add7-4bae25f0df37_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Asset coverage requirement applicable to senior securities</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Senior Security, Indebtedness, Asset Coverage Ratio</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:to="lab_us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_InvestmentCompanyDistributionPolicyTextBlock_019fed4d-3dd3-7b06-be0f-7a91b41bbf79_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDistributionPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends to Common Stockholders</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock"/>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract"/>
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    <link:label id="lab_arcc_DoximInc.Member_label_en-US" xlink:label="lab_arcc_DoximInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Doxim Inc. [Member]</link:label>
    <link:label id="lab_arcc_DoximInc.Member_documentation_en-US" xlink:label="lab_arcc_DoximInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Doxim Inc.</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain_019fed4d-3dd3-7c53-8903-bb5a63a474ea_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Company, Nonconsolidated Subsidiary [Domain]</link:label>
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    <link:label id="lab_srt_MinimumMember_019fed4d-3dd3-7f08-a4eb-f9ba2adf9030_terseLabel_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum</link:label>
    <link:label id="lab_srt_MinimumMember_label_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum [Member]</link:label>
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    <link:label id="lab_arcc_PSCParentInc.Member_019fed4d-3d41-765a-9814-c0bc9480f0c1_terseLabel_en-US" xlink:label="lab_arcc_PSCParentInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PSC Parent, Inc.</link:label>
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    <link:label id="lab_arcc_PSCParentInc.Member_documentation_en-US" xlink:label="lab_arcc_PSCParentInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PSC Parent, Inc.</link:label>
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    <link:label id="lab_ecd_NonRule10b51ArrAdoptedFlag_terseLabel_en-US" xlink:label="lab_ecd_NonRule10b51ArrAdoptedFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Rule 10b5-1 Arrangement Adopted</link:label>
    <link:label id="lab_ecd_NonRule10b51ArrAdoptedFlag_label_en-US" xlink:label="lab_ecd_NonRule10b51ArrAdoptedFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Rule 10b5-1 Arrangement Adopted [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonRule10b51ArrAdoptedFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonRule10b51ArrAdoptedFlag"/>
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    <link:label id="lab_arcc_SharesPurchasedPricePerShare_019fed4d-3dd3-707e-9d64-4c8e242f1f18_terseLabel_en-US" xlink:label="lab_arcc_SharesPurchasedPricePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average purchase price per share (in dollars per share)</link:label>
    <link:label id="lab_arcc_SharesPurchasedPricePerShare_label_en-US" xlink:label="lab_arcc_SharesPurchasedPricePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shares Purchased, Price Per Share</link:label>
    <link:label id="lab_arcc_SharesPurchasedPricePerShare_documentation_en-US" xlink:label="lab_arcc_SharesPurchasedPricePerShare" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shares Purchased, Price Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SharesPurchasedPricePerShare" xlink:href="arcc-20260930.xsd#arcc_SharesPurchasedPricePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SharesPurchasedPricePerShare" xlink:to="lab_arcc_SharesPurchasedPricePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TheHillerCompaniesLLCMember_019fed4d-3e56-7a70-b18f-7ccd2a171cec_terseLabel_en-US" xlink:label="lab_arcc_TheHillerCompaniesLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">The Hiller Companies, LLC</link:label>
    <link:label id="lab_arcc_TheHillerCompaniesLLCMember_label_en-US" xlink:label="lab_arcc_TheHillerCompaniesLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">The Hiller Companies, LLC [Member]</link:label>
    <link:label id="lab_arcc_TheHillerCompaniesLLCMember_documentation_en-US" xlink:label="lab_arcc_TheHillerCompaniesLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The Hiller Companies, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TheHillerCompaniesLLCMember" xlink:href="arcc-20260930.xsd#arcc_TheHillerCompaniesLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TheHillerCompaniesLLCMember" xlink:to="lab_arcc_TheHillerCompaniesLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PyramidBMCIntermediateCoILLCAndPyramidInvestorsLLCMember_019fed4d-3d41-7a23-894e-143a09f34c93_terseLabel_en-US" xlink:label="lab_arcc_PyramidBMCIntermediateCoILLCAndPyramidInvestorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pyramid-BMC IntermediateCo I, LLC and Pyramid Investors, LLC</link:label>
    <link:label id="lab_arcc_PyramidBMCIntermediateCoILLCAndPyramidInvestorsLLCMember_label_en-US" xlink:label="lab_arcc_PyramidBMCIntermediateCoILLCAndPyramidInvestorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pyramid-BMC IntermediateCo I, LLC and Pyramid Investors, LLC [Member]</link:label>
    <link:label id="lab_arcc_PyramidBMCIntermediateCoILLCAndPyramidInvestorsLLCMember_documentation_en-US" xlink:label="lab_arcc_PyramidBMCIntermediateCoILLCAndPyramidInvestorsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pyramid-BMC IntermediateCo I, LLC and Pyramid Investors, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PyramidBMCIntermediateCoILLCAndPyramidInvestorsLLCMember" xlink:href="arcc-20260930.xsd#arcc_PyramidBMCIntermediateCoILLCAndPyramidInvestorsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PyramidBMCIntermediateCoILLCAndPyramidInvestorsLLCMember" xlink:to="lab_arcc_PyramidBMCIntermediateCoILLCAndPyramidInvestorsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember_terseLabel_en-US" xlink:label="lab_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table</link:label>
    <link:label id="lab_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember_label_en-US" xlink:label="lab_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember"/>
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    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019fed4d-3e56-7aa4-a028-e746111a25fc_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
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    <link:label id="lab_us-gaap_OtherLiabilities_019fed4d-3dd3-7ce9-a023-392dd8b9c2ec_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other liabilities</link:label>
    <link:label id="lab_us-gaap_OtherLiabilities_label_en-US" xlink:label="lab_us-gaap_OtherLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilities" xlink:to="lab_us-gaap_OtherLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsCommonStock_019fed4d-3d42-71c2-af0f-53ba18971b30_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total amount</link:label>
    <link:label id="lab_us-gaap_DividendsCommonStock_label_en-US" xlink:label="lab_us-gaap_DividendsCommonStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends, Common Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsCommonStock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsCommonStock" xlink:to="lab_us-gaap_DividendsCommonStock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember_019fed4d-3e56-7cfd-988b-623f30700774_terseLabel_en-US" xlink:label="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ISQ Hawkeye Holdco, Inc. and ISQ Hawkeye Holdings, LLC</link:label>
    <link:label id="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember_label_en-US" xlink:label="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ISQ Hawkeye Holdco, Inc. and ISQ Hawkeye Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ISQ Hawkeye Holdco, Inc. and ISQ Hawkeye Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:to="lab_arcc_ISQHawkeyeHoldcoIncAndISQHawkeyeHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TheMatherGroupLLCTVGTMGTopcoIncAndTVGTMGHoldingsLLCMember_019fed4d-3dd3-7143-93e3-2eefde0aef9e_terseLabel_en-US" xlink:label="lab_arcc_TheMatherGroupLLCTVGTMGTopcoIncAndTVGTMGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">The Mather Group, LLC, TVG-TMG Topco, Inc., and TVG-TMG Holdings, LLC</link:label>
    <link:label id="lab_arcc_TheMatherGroupLLCTVGTMGTopcoIncAndTVGTMGHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_TheMatherGroupLLCTVGTMGTopcoIncAndTVGTMGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">The Mather Group, LLC, TVG-TMG Topco, Inc., and TVG-TMG Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_TheMatherGroupLLCTVGTMGTopcoIncAndTVGTMGHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_TheMatherGroupLLCTVGTMGTopcoIncAndTVGTMGHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The Mather Group, LLC, TVG-TMG Topco, Inc., and TVG-TMG Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TheMatherGroupLLCTVGTMGTopcoIncAndTVGTMGHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_TheMatherGroupLLCTVGTMGTopcoIncAndTVGTMGHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TheMatherGroupLLCTVGTMGTopcoIncAndTVGTMGHoldingsLLCMember" xlink:to="lab_arcc_TheMatherGroupLLCTVGTMGTopcoIncAndTVGTMGHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember_019fed4d-3dd3-7097-af45-41a880f031c8_terseLabel_en-US" xlink:label="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tamarack Intermediate, L.L.C. and Tamarack Parent, L.L.C.</link:label>
    <link:label id="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember_label_en-US" xlink:label="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tamarack Intermediate, L.L.C. and Tamarack Parent, L.L.C. [Member]</link:label>
    <link:label id="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember_documentation_en-US" xlink:label="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tamarack Intermediate, L.L.C. and Tamarack Parent, L.L.C.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:href="arcc-20260930.xsd#arcc_TamarackIntermediateLLCAndTamarackParentLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:to="lab_arcc_TamarackIntermediateLLCAndTamarackParentLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_019fed4d-3d42-7bb8-99c9-3e6c2df6943a_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, shares authorized (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares Authorized</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesAuthorized" xlink:to="lab_us-gaap_CommonStockSharesAuthorized" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GuidepointSecurityHoldingsLLCMember_019fed4d-3e55-7793-8034-93f8769d8f5f_terseLabel_en-US" xlink:label="lab_arcc_GuidepointSecurityHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Guidepoint Security Holdings, LLC</link:label>
    <link:label id="lab_arcc_GuidepointSecurityHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_GuidepointSecurityHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Guidepoint Security Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_GuidepointSecurityHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_GuidepointSecurityHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Guidepoint Security Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GuidepointSecurityHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_GuidepointSecurityHoldingsLLCMember"/>
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    <link:label id="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019fed4d-3dd3-7c73-8dc5-1f87e2afa263_verboseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of shares issued (in shares)</link:label>
    <link:label id="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_label_en-US" xlink:label="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Stock, Number of Shares Issued in Transaction</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:to="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetsUnderManagementCarryingAmount_019fed4d-3d42-762c-96e7-85f89649ffe1_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsUnderManagementCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets under management</link:label>
    <link:label id="lab_us-gaap_AssetsUnderManagementCarryingAmount_label_en-US" xlink:label="lab_us-gaap_AssetsUnderManagementCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets under Management, Carrying Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsUnderManagementCarryingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsUnderManagementCarryingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsUnderManagementCarryingAmount" xlink:to="lab_us-gaap_AssetsUnderManagementCarryingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock_019fed4d-3dd3-7a8c-8502-89cab4081541_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Carrying and Fair Values of Debt Obligations</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardExrcPrice_terseLabel_en-US" xlink:label="lab_ecd_AwardExrcPrice" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercise Price</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardExrcPrice" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardExrcPrice"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardExrcPrice" xlink:to="lab_ecd_AwardExrcPrice" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_April2031NotesMember_019fed4d-3d42-75cc-8979-da6fbcb46551_terseLabel_en-US" xlink:label="lab_arcc_April2031NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">April 2031 Notes</link:label>
    <link:label id="lab_arcc_April2031NotesMember_019fed4d-3d42-7e53-81ad-ee5ee9a07863_verboseLabel_en-US" xlink:label="lab_arcc_April2031NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">April 2031 Notes (principal amount outstanding of $750 and $0, respectively)</link:label>
    <link:label id="lab_arcc_April2031NotesMember_label_en-US" xlink:label="lab_arcc_April2031NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">April 2031 Notes [Member]</link:label>
    <link:label id="lab_arcc_April2031NotesMember_documentation_en-US" xlink:label="lab_arcc_April2031NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">April 2031 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_April2031NotesMember" xlink:href="arcc-20260930.xsd#arcc_April2031NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_April2031NotesMember" xlink:to="lab_arcc_April2031NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_StockRepurchaseProgramAuthorizedAmount1_019fed4d-3e56-7575-b0fb-d3d940650071_terseLabel_en-US" xlink:label="lab_srt_StockRepurchaseProgramAuthorizedAmount1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Authorized amount of stock repurchase program</link:label>
    <link:label id="lab_srt_StockRepurchaseProgramAuthorizedAmount1_label_en-US" xlink:label="lab_srt_StockRepurchaseProgramAuthorizedAmount1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Repurchase Program, Authorized, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_StockRepurchaseProgramAuthorizedAmount1" xlink:to="lab_srt_StockRepurchaseProgramAuthorizedAmount1" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HorizonAvionicsBuyerLLCAndHorizonCTSBuyerLLCMember_019fed4d-3e56-74a8-8506-b614aa217546_terseLabel_en-US" xlink:label="lab_arcc_HorizonAvionicsBuyerLLCAndHorizonCTSBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Horizon Avionics Buyer, LLC and Horizon CTS Buyer, LLC</link:label>
    <link:label id="lab_arcc_HorizonAvionicsBuyerLLCAndHorizonCTSBuyerLLCMember_label_en-US" xlink:label="lab_arcc_HorizonAvionicsBuyerLLCAndHorizonCTSBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Horizon Avionics Buyer, LLC and Horizon CTS Buyer, LLC [Member]</link:label>
    <link:label id="lab_arcc_HorizonAvionicsBuyerLLCAndHorizonCTSBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_HorizonAvionicsBuyerLLCAndHorizonCTSBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Horizon Avionics Buyer, LLC and Horizon CTS Buyer, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HorizonAvionicsBuyerLLCAndHorizonCTSBuyerLLCMember" xlink:href="arcc-20260930.xsd#arcc_HorizonAvionicsBuyerLLCAndHorizonCTSBuyerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HorizonAvionicsBuyerLLCAndHorizonCTSBuyerLLCMember" xlink:to="lab_arcc_HorizonAvionicsBuyerLLCAndHorizonCTSBuyerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentQuarterlyReport_019fed4d-3dd3-788b-88f9-359903bbf23f_terseLabel_en-US" xlink:label="lab_dei_DocumentQuarterlyReport" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Quarterly Report</link:label>
    <link:label id="lab_dei_DocumentQuarterlyReport_label_en-US" xlink:label="lab_dei_DocumentQuarterlyReport" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Quarterly Report</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentQuarterlyReport" xlink:to="lab_dei_DocumentQuarterlyReport" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember_terseLabel_en-US" xlink:label="lab_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested</link:label>
    <link:label id="lab_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember_label_en-US" xlink:label="lab_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:to="lab_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_YEBrandsHoldingsLLCMember_019fed4d-3e56-7da0-ac7e-299c011b50b2_terseLabel_en-US" xlink:label="lab_arcc_YEBrandsHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">YE Brands Holdings, LLC</link:label>
    <link:label id="lab_arcc_YEBrandsHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_YEBrandsHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">YE Brands Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_YEBrandsHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_YEBrandsHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">YE Brands Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_YEBrandsHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_YEBrandsHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_YEBrandsHoldingsLLCMember" xlink:to="lab_arcc_YEBrandsHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAInc.Member_019fed4d-3dd3-789b-a33f-4b762ebd06c3_terseLabel_en-US" xlink:label="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Datix Bidco Limited and RL Datix Holdings (USA), Inc.</link:label>
    <link:label id="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAInc.Member_label_en-US" xlink:label="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Datix Bidco Limited and RL Datix Holdings (USA), Inc. [Member]</link:label>
    <link:label id="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAInc.Member_documentation_en-US" xlink:label="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Datix Bidco Limited and RL Datix Holdings (USA), Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAInc.Member" xlink:href="arcc-20260930.xsd#arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAInc.Member" xlink:to="lab_arcc_DatixBidcoLimitedAndRLDatixHoldingsUSAInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput_019fed4d-3dd3-7352-bceb-c53965c04c55_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unobservable&#160;Input</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Investment Owned, Measurement Input</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput" xlink:to="lab_us-gaap_InvestmentCompanyInvestmentOwnedFairValueMeasurementInput" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentOwnedAtCost_019fed4d-3d42-79ea-94ca-43578538eb0c_verboseLabel_en-US" xlink:label="lab_us-gaap_InvestmentOwnedAtCost" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Amortized cost of investments</link:label>
    <link:label id="lab_us-gaap_InvestmentOwnedAtCost_019fed4d-3d42-75ba-bd3e-1dcce7eda33e_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentOwnedAtCost" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortized Cost</link:label>
    <link:label id="lab_us-gaap_InvestmentOwnedAtCost_label_en-US" xlink:label="lab_us-gaap_InvestmentOwnedAtCost" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Cost</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedAtCost" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentOwnedAtCost"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedAtCost" xlink:to="lab_us-gaap_InvestmentOwnedAtCost" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions_019fed4d-3dd3-709c-9409-dd924cd98fa2_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchases (cost)</link:label>
    <link:label id="lab_us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions_label_en-US" xlink:label="lab_us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments in and Advances to Affiliates, at Fair Value, Gross Additions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions" xlink:to="lab_us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_019fed4d-3d41-7695-b77e-227dddce4b8c_terseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate principal amount outstanding</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Long-Term Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfLongTermDebt" xlink:to="lab_us-gaap_RepaymentsOfLongTermDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PaymentsOfCapitalGainsIncentiveFees_019fed4d-3d42-72ff-89dd-1fe4f74f1457_terseLabel_en-US" xlink:label="lab_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payments of capital gains incentive fees</link:label>
    <link:label id="lab_arcc_PaymentsOfCapitalGainsIncentiveFees_label_en-US" xlink:label="lab_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments Of Capital Gains Incentive Fees</link:label>
    <link:label id="lab_arcc_PaymentsOfCapitalGainsIncentiveFees_documentation_en-US" xlink:label="lab_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payments Of Capital Gains Incentive Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:href="arcc-20260930.xsd#arcc_PaymentsOfCapitalGainsIncentiveFees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:to="lab_arcc_PaymentsOfCapitalGainsIncentiveFees" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VeristaInc.Member_019fed4d-3d42-7fb4-8e0a-b65da1438663_terseLabel_en-US" xlink:label="lab_arcc_VeristaInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Verista, Inc.</link:label>
    <link:label id="lab_arcc_VeristaInc.Member_label_en-US" xlink:label="lab_arcc_VeristaInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Verista, Inc. [Member]</link:label>
    <link:label id="lab_arcc_VeristaInc.Member_documentation_en-US" xlink:label="lab_arcc_VeristaInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Verista, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VeristaInc.Member" xlink:href="arcc-20260930.xsd#arcc_VeristaInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VeristaInc.Member" xlink:to="lab_arcc_VeristaInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ReceivableInvestmentSale_019fed4d-3dd3-7ec9-8b0c-a3f1a453464e_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivableInvestmentSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivable for open trades</link:label>
    <link:label id="lab_us-gaap_ReceivableInvestmentSale_label_en-US" xlink:label="lab_us-gaap_ReceivableInvestmentSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivable, Investment, Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableInvestmentSale" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReceivableInvestmentSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivableInvestmentSale" xlink:to="lab_us-gaap_ReceivableInvestmentSale" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ManagementFeeExpense_019fed4d-3d42-7cf5-b189-3527c1057b5b_terseLabel_en-US" xlink:label="lab_us-gaap_ManagementFeeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base management fee</link:label>
    <link:label id="lab_us-gaap_ManagementFeeExpense_019fed4d-3d42-7496-9b7b-978b435fc471_verboseLabel_en-US" xlink:label="lab_us-gaap_ManagementFeeExpense" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Base management fee</link:label>
    <link:label id="lab_us-gaap_ManagementFeeExpense_label_en-US" xlink:label="lab_us-gaap_ManagementFeeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Management Fee Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ManagementFeeExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ManagementFeeExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ManagementFeeExpense" xlink:to="lab_us-gaap_ManagementFeeExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RevolvingFundingFacilityMember_019fed4d-3dd3-7dfd-8ffb-046dc820889b_terseLabel_en-US" xlink:label="lab_arcc_RevolvingFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Funding Facility</link:label>
    <link:label id="lab_arcc_RevolvingFundingFacilityMember_label_en-US" xlink:label="lab_arcc_RevolvingFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving Funding Facility [Member]</link:label>
    <link:label id="lab_arcc_RevolvingFundingFacilityMember_documentation_en-US" xlink:label="lab_arcc_RevolvingFundingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revolving Funding Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RevolvingFundingFacilityMember" xlink:href="arcc-20260930.xsd#arcc_RevolvingFundingFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RevolvingFundingFacilityMember" xlink:to="lab_arcc_RevolvingFundingFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember_019fed4d-3dd3-7e07-acbf-61a5e0f8f9bb_terseLabel_en-US" xlink:label="lab_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Crown CT Parent Inc., Crown CT HoldCo Inc. and Crown CT Management LLC</link:label>
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    <link:label id="lab_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember_documentation_en-US" xlink:label="lab_arcc_CrownCTParentIncCrownCTHoldCoIncAndCrownCTManagementLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Crown CT Parent Inc., Crown CT HoldCo Inc. and Crown CT Management LLC</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyFinancialHighlightsTextBlock" xlink:to="lab_us-gaap_InvestmentCompanyFinancialHighlightsTextBlock" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_EquityComponentDomain_label_en-US" xlink:label="lab_us-gaap_EquityComponentDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
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    <link:label id="lab_arcc_InvestmentOwnedBalancePercentOfShares_019fed4d-3dd3-7598-a3c1-2ab7b4a30215_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedBalancePercentOfShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares (as a percent)</link:label>
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    <link:label id="lab_arcc_InvestmentOwnedBalancePercentOfShares_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedBalancePercentOfShares" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Balance, Percent Of Shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedBalancePercentOfShares" xlink:href="arcc-20260930.xsd#arcc_InvestmentOwnedBalancePercentOfShares"/>
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    <link:label id="lab_arcc_AdonisAcquisitionHoldingsLLCAndAdonisAcquisitionHoldingsParentLLCMember_019fed4d-3dd3-7e29-a1fb-b158bf483239_terseLabel_en-US" xlink:label="lab_arcc_AdonisAcquisitionHoldingsLLCAndAdonisAcquisitionHoldingsParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adonis Acquisition Holdings LLC and Adonis Acquisition Holdings Parent LLC</link:label>
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    <link:label id="lab_arcc_AldingerCompanyIncMember_019fed4d-3d42-7c10-bc09-aedb414d7c2b_terseLabel_en-US" xlink:label="lab_arcc_AldingerCompanyIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aldinger Company Inc</link:label>
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    <link:label id="lab_arcc_AldingerCompanyIncMember_documentation_en-US" xlink:label="lab_arcc_AldingerCompanyIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Aldinger Company Inc</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_TradingTechnologiesInternationalInc.Member" xlink:href="arcc-20260930.xsd#arcc_TradingTechnologiesInternationalInc.Member"/>
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    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_01a17add-b6d8-7a15-a9d7-a4c3ca8add9f_terseLabel_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_label_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember_019fed4d-3d42-7e33-840e-5e612b8fcff3_terseLabel_en-US" xlink:label="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Independent Power and Renewable Electricity Producers</link:label>
    <link:label id="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember_label_en-US" xlink:label="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Independent Power And Renewable Electricity Producers [Member]</link:label>
    <link:label id="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember_documentation_en-US" xlink:label="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Independent Power And Renewable Electricity Producers</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:href="arcc-20260930.xsd#arcc_IndependentPowerAndRenewableElectricityProducersMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:to="lab_arcc_IndependentPowerAndRenewableElectricityProducersMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember_019fed4d-3dd3-7ab2-8088-aa36208eee82_terseLabel_en-US" xlink:label="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Worldwide Produce Acquisition, LLC and REP WWP Coinvest IV, L.P.</link:label>
    <link:label id="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember_label_en-US" xlink:label="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Worldwide Produce Acquisition, LLC and REP WWP Coinvest IV, L.P. [Member]</link:label>
    <link:label id="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember_documentation_en-US" xlink:label="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Worldwide Produce Acquisition, LLC and REP WWP Coinvest IV, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:href="arcc-20260930.xsd#arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:to="lab_arcc_WorldwideProduceAcquisitionLLCAndREPWWPCoinvestIVLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CustomIngredientsLLCAndButterflySpringboardCoInvestAL.P.Member_01a1583a-0e75-794e-b235-7ef494a11b61_terseLabel_en-US" xlink:label="lab_arcc_CustomIngredientsLLCAndButterflySpringboardCoInvestAL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Custom Ingredients, LLC and Butterfly Springboard Co-Invest-A, L.P.</link:label>
    <link:label id="lab_arcc_CustomIngredientsLLCAndButterflySpringboardCoInvestAL.P.Member_label_en-US" xlink:label="lab_arcc_CustomIngredientsLLCAndButterflySpringboardCoInvestAL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Custom Ingredients, LLC and Butterfly Springboard Co-Invest-A, L.P. [Member]</link:label>
    <link:label id="lab_arcc_CustomIngredientsLLCAndButterflySpringboardCoInvestAL.P.Member_documentation_en-US" xlink:label="lab_arcc_CustomIngredientsLLCAndButterflySpringboardCoInvestAL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Custom Ingredients, LLC and Butterfly Springboard Co-Invest-A, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CustomIngredientsLLCAndButterflySpringboardCoInvestAL.P.Member" xlink:href="arcc-20260930.xsd#arcc_CustomIngredientsLLCAndButterflySpringboardCoInvestAL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CustomIngredientsLLCAndButterflySpringboardCoInvestAL.P.Member" xlink:to="lab_arcc_CustomIngredientsLLCAndButterflySpringboardCoInvestAL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrIndTitle_terseLabel_en-US" xlink:label="lab_ecd_TrdArrIndTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Title</link:label>
    <link:label id="lab_ecd_TrdArrIndTitle_label_en-US" xlink:label="lab_ecd_TrdArrIndTitle" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement, Individual Title</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrIndTitle" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrIndTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrIndTitle" xlink:to="lab_ecd_TrdArrIndTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt_terseLabel_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Disqualification of Tax Benefits, Amount</link:label>
    <link:label id="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt_label_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Disqualification of Tax Benefits, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:to="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019fed4d-3d42-7b81-891b-fb4c05e61c8b_verboseLabel_en-US" xlink:label="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Borrowing capacity increase under line of credit</link:label>
    <link:label id="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019fed4d-3d42-7cd9-8121-c3f7a37c047a_terseLabel_en-US" xlink:label="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of credit, borrowing capacity incremental increase limit</link:label>
    <link:label id="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit_label_en-US" xlink:label="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line Of Credit Facility, Accordion Feature, Increase Limit</link:label>
    <link:label id="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit_documentation_en-US" xlink:label="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Line Of Credit Facility, Accordion Feature, Increase Limit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit" xlink:href="arcc-20260930.xsd#arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit" xlink:to="lab_arcc_LineOfCreditFacilityAccordionFeatureIncreaseLimit" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccountingPoliciesAbstract_label_en-US" xlink:label="lab_us-gaap_AccountingPoliciesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounting Policies [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingPoliciesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingPoliciesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountingPoliciesAbstract" xlink:to="lab_us-gaap_AccountingPoliciesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PerkinElmerUSLLCAndNMPolarisCoInvestLPMember_019fed4d-3dd3-7f0d-a030-f9df9d9878f7_terseLabel_en-US" xlink:label="lab_arcc_PerkinElmerUSLLCAndNMPolarisCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PerkinElmer U.S. LLC and NM Polaris Co-Invest, L.P.</link:label>
    <link:label id="lab_arcc_PerkinElmerUSLLCAndNMPolarisCoInvestLPMember_label_en-US" xlink:label="lab_arcc_PerkinElmerUSLLCAndNMPolarisCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PerkinElmer U.S. LLC and NM Polaris Co-Invest, L.P. [Member]</link:label>
    <link:label id="lab_arcc_PerkinElmerUSLLCAndNMPolarisCoInvestLPMember_documentation_en-US" xlink:label="lab_arcc_PerkinElmerUSLLCAndNMPolarisCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PerkinElmer U.S. LLC and NM Polaris Co-Invest, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PerkinElmerUSLLCAndNMPolarisCoInvestLPMember" xlink:href="arcc-20260930.xsd#arcc_PerkinElmerUSLLCAndNMPolarisCoInvestLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PerkinElmerUSLLCAndNMPolarisCoInvestLPMember" xlink:to="lab_arcc_PerkinElmerUSLLCAndNMPolarisCoInvestLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PremiereBuyerLLCMember_019fed4d-3d42-72c6-a047-04a350c516b4_terseLabel_en-US" xlink:label="lab_arcc_PremiereBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premiere Buyer, LLC</link:label>
    <link:label id="lab_arcc_PremiereBuyerLLCMember_label_en-US" xlink:label="lab_arcc_PremiereBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premiere Buyer, LLC [Member]</link:label>
    <link:label id="lab_arcc_PremiereBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_PremiereBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Premiere Buyer, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PremiereBuyerLLCMember" xlink:href="arcc-20260930.xsd#arcc_PremiereBuyerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PremiereBuyerLLCMember" xlink:to="lab_arcc_PremiereBuyerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_RestatementDoesNotRequireRecoveryTextBlock_terseLabel_en-US" xlink:label="lab_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restatement does not require Recovery</link:label>
    <link:label id="lab_ecd_RestatementDoesNotRequireRecoveryTextBlock_label_en-US" xlink:label="lab_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement Does Not Require Recovery [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_RestatementDoesNotRequireRecoveryTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:to="lab_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractEUR1Member_019fed4d-3dd3-73fe-b889-56885ab05514_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractEUR1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, EUR 1</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractEUR1Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractEUR1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, EUR 1 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractEUR1Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractEUR1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, EUR 1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractEUR1Member" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractEUR1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractEUR1Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractEUR1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsOfStockIssuanceCosts_019fed4d-3e56-7fe4-ad33-4831797919e3_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfStockIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Underwriting Fees/Offering Expenses</link:label>
    <link:label id="lab_us-gaap_PaymentsOfStockIssuanceCosts_label_en-US" xlink:label="lab_us-gaap_PaymentsOfStockIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Stock Issuance Costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfStockIssuanceCosts" xlink:to="lab_us-gaap_PaymentsOfStockIssuanceCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestIncomeOperating_019fed4d-3d42-7c05-89ec-7bcd8f8b8cc9_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeOperating" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest income</link:label>
    <link:label id="lab_us-gaap_InterestIncomeOperating_019fed4d-3d42-765f-9cdb-8977cdcd2255_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeOperating" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Interest income</link:label>
    <link:label id="lab_us-gaap_InterestIncomeOperating_label_en-US" xlink:label="lab_us-gaap_InterestIncomeOperating" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income, Operating</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOperating" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeOperating"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeOperating" xlink:to="lab_us-gaap_InterestIncomeOperating" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_InsiderTrdPoliciesProcAdoptedFlag_terseLabel_en-US" xlink:label="lab_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Insider Trading Policies and Procedures Adopted</link:label>
    <link:label id="lab_ecd_InsiderTrdPoliciesProcAdoptedFlag_label_en-US" xlink:label="lab_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insider Trading Policies and Procedures Adopted [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_InsiderTrdPoliciesProcAdoptedFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:to="lab_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ASPRPacAcquisitionCOLLCAndASPRPacHoldingsLPMember_019fed4d-3e56-7ea7-a50b-3293ed40814c_terseLabel_en-US" xlink:label="lab_arcc_ASPRPacAcquisitionCOLLCAndASPRPacHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ASP-r-pac Acquisition Co LLC and ASP-r-pac Holdings LP</link:label>
    <link:label id="lab_arcc_ASPRPacAcquisitionCOLLCAndASPRPacHoldingsLPMember_label_en-US" xlink:label="lab_arcc_ASPRPacAcquisitionCOLLCAndASPRPacHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ASP-r-pac Acquisition CO LLC and ASP-r-pac Holdings LP [Member]</link:label>
    <link:label id="lab_arcc_ASPRPacAcquisitionCOLLCAndASPRPacHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_ASPRPacAcquisitionCOLLCAndASPRPacHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ASP-r-pac Acquisition Co LLC and ASP-r-pac Holdings LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ASPRPacAcquisitionCOLLCAndASPRPacHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_ASPRPacAcquisitionCOLLCAndASPRPacHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ASPRPacAcquisitionCOLLCAndASPRPacHoldingsLPMember" xlink:to="lab_arcc_ASPRPacAcquisitionCOLLCAndASPRPacHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OpenForwardForeignCurrencyContractLineItems_019fed4d-3d42-70d6-b20f-4169b458d79d_verboseLabel_en-US" xlink:label="lab_us-gaap_OpenForwardForeignCurrencyContractLineItems" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Open Forward Foreign Currency Contract [Line Items]</link:label>
    <link:label id="lab_us-gaap_OpenForwardForeignCurrencyContractLineItems_label_en-US" xlink:label="lab_us-gaap_OpenForwardForeignCurrencyContractLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Open Forward Foreign Currency Contract [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OpenForwardForeignCurrencyContractLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OpenForwardForeignCurrencyContractLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OpenForwardForeignCurrencyContractLineItems" xlink:to="lab_us-gaap_OpenForwardForeignCurrencyContractLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_019fed4d-3d42-7ad5-8f59-7876bc2cbff5_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Revolving and Term Loan</link:label>
    <link:label id="lab_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Line of Credit Facilities [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:to="lab_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VisualEdgeTechnologyInc.VEITLLCAndVEITTopcoLLCMember_019fed4d-3e56-7154-a977-2e4cba470c92_terseLabel_en-US" xlink:label="lab_arcc_VisualEdgeTechnologyInc.VEITLLCAndVEITTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Visual Edge Technology, Inc., VEIT, LLC, and VEIT Topco, LLC,</link:label>
    <link:label id="lab_arcc_VisualEdgeTechnologyInc.VEITLLCAndVEITTopcoLLCMember_label_en-US" xlink:label="lab_arcc_VisualEdgeTechnologyInc.VEITLLCAndVEITTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Visual Edge Technology, Inc., VEIT, LLC, and VEIT Topco, LLC [Member]</link:label>
    <link:label id="lab_arcc_VisualEdgeTechnologyInc.VEITLLCAndVEITTopcoLLCMember_documentation_en-US" xlink:label="lab_arcc_VisualEdgeTechnologyInc.VEITLLCAndVEITTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Visual Edge Technology, Inc., VEIT, LLC, and VEIT Topco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VisualEdgeTechnologyInc.VEITLLCAndVEITTopcoLLCMember" xlink:href="arcc-20260930.xsd#arcc_VisualEdgeTechnologyInc.VEITLLCAndVEITTopcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VisualEdgeTechnologyInc.VEITLLCAndVEITTopcoLLCMember" xlink:to="lab_arcc_VisualEdgeTechnologyInc.VEITLLCAndVEITTopcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossLineItems_019fed4d-3e56-7312-89c4-3ac92801e69b_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) [Line Items]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossLineItems_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="lab_us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MoonrakerAcquisitionCoLLCAndMoonrakerHoldCoLLCMember_019fed4d-3dd3-77f6-911e-b7c21bc8a7ce_terseLabel_en-US" xlink:label="lab_arcc_MoonrakerAcquisitionCoLLCAndMoonrakerHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Moonraker AcquisitionCo LLC and Moonraker HoldCo LLC</link:label>
    <link:label id="lab_arcc_MoonrakerAcquisitionCoLLCAndMoonrakerHoldCoLLCMember_label_en-US" xlink:label="lab_arcc_MoonrakerAcquisitionCoLLCAndMoonrakerHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Moonraker AcquisitionCo LLC and Moonraker HoldCo LLC [Member]</link:label>
    <link:label id="lab_arcc_MoonrakerAcquisitionCoLLCAndMoonrakerHoldCoLLCMember_documentation_en-US" xlink:label="lab_arcc_MoonrakerAcquisitionCoLLCAndMoonrakerHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Moonraker AcquisitionCo LLC and</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MoonrakerAcquisitionCoLLCAndMoonrakerHoldCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_MoonrakerAcquisitionCoLLCAndMoonrakerHoldCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MoonrakerAcquisitionCoLLCAndMoonrakerHoldCoLLCMember" xlink:to="lab_arcc_MoonrakerAcquisitionCoLLCAndMoonrakerHoldCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BobtailAcquisitionCoLLCMember_019fed4d-3d41-7288-81f2-ddff81dfdded_terseLabel_en-US" xlink:label="lab_arcc_BobtailAcquisitionCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bobtail AcquisitionCo, LLC</link:label>
    <link:label id="lab_arcc_BobtailAcquisitionCoLLCMember_label_en-US" xlink:label="lab_arcc_BobtailAcquisitionCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bobtail AcquisitionCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_BobtailAcquisitionCoLLCMember_documentation_en-US" xlink:label="lab_arcc_BobtailAcquisitionCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bobtail AcquisitionCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BobtailAcquisitionCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_BobtailAcquisitionCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BobtailAcquisitionCoLLCMember" xlink:to="lab_arcc_BobtailAcquisitionCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BusinessAcquisitionAcquireeDomain_01a17ad2-3371-7a74-a3ad-14227535cae7_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAcquireeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination [Domain]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionAcquireeDomain_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAcquireeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain" xlink:to="lab_us-gaap_BusinessAcquisitionAcquireeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember_019fed4d-3dd3-7507-be33-f7949936175c_terseLabel_en-US" xlink:label="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">RE Community Holdings GP, LLC and RE Community Holdings, LP</link:label>
    <link:label id="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember_label_en-US" xlink:label="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">RE Community Holdings GP, LLC and RE Community Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">RE Community Holdings GP, LLC and RE Community Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:to="lab_arcc_RECommunityHoldingsGPLLCAndRECommunityHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LetterOfCreditMember_019fed4d-3e55-7d5d-8775-63e61988ab61_terseLabel_en-US" xlink:label="lab_us-gaap_LetterOfCreditMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letter of Credit</link:label>
    <link:label id="lab_us-gaap_LetterOfCreditMember_label_en-US" xlink:label="lab_us-gaap_LetterOfCreditMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letter of Credit [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LetterOfCreditMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LetterOfCreditMember" xlink:to="lab_us-gaap_LetterOfCreditMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_019fed4d-3dd3-7aa3-84d2-0e34b1dc4696_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">COMMITMENTS AND CONTINGENCIES</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GulaBuyerInc.AndGulaCoInvestIIL.P.Member_019fed4d-3d42-7147-91ad-859a65a8e7ba_terseLabel_en-US" xlink:label="lab_arcc_GulaBuyerInc.AndGulaCoInvestIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gula Buyer Inc. and Gula Co-Invest II, L.P.</link:label>
    <link:label id="lab_arcc_GulaBuyerInc.AndGulaCoInvestIIL.P.Member_label_en-US" xlink:label="lab_arcc_GulaBuyerInc.AndGulaCoInvestIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gula Buyer Inc. and Gula Co-Invest II, L.P. [Member]</link:label>
    <link:label id="lab_arcc_GulaBuyerInc.AndGulaCoInvestIIL.P.Member_documentation_en-US" xlink:label="lab_arcc_GulaBuyerInc.AndGulaCoInvestIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gula Buyer Inc. and Gula Co-Invest II, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GulaBuyerInc.AndGulaCoInvestIIL.P.Member" xlink:href="arcc-20260930.xsd#arcc_GulaBuyerInc.AndGulaCoInvestIIL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GulaBuyerInc.AndGulaCoInvestIIL.P.Member" xlink:to="lab_arcc_GulaBuyerInc.AndGulaCoInvestIIL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_CompActuallyPaidVsNetIncomeTextBlock_terseLabel_en-US" xlink:label="lab_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Net Income</link:label>
    <link:label id="lab_ecd_CompActuallyPaidVsNetIncomeTextBlock_label_en-US" xlink:label="lab_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Net Income [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_CompActuallyPaidVsNetIncomeTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:to="lab_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember_019fed4d-3d42-7cb2-9149-58fcc4aeb16e_terseLabel_en-US" xlink:label="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Inszone Mid, LLC and INSZ Holdings, LLC</link:label>
    <link:label id="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Inszone Mid, LLC and INSZ Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Inszone Mid, LLC and INSZ Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_InszoneMidLLCAndINSZHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:to="lab_arcc_InszoneMidLLCAndINSZHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_WeightedAverageMember_019fed4d-3dd3-77b3-ab1c-9f035a290a31_terseLabel_en-US" xlink:label="lab_srt_WeightedAverageMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average</link:label>
    <link:label id="lab_srt_WeightedAverageMember_label_en-US" xlink:label="lab_srt_WeightedAverageMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_WeightedAverageMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_WeightedAverageMember" xlink:to="lab_srt_WeightedAverageMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RocketBuyerLLCMember_019fed4d-3dd3-79c6-ae4d-0c024213a7d3_terseLabel_en-US" xlink:label="lab_arcc_RocketBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rocket Buyer, LLC</link:label>
    <link:label id="lab_arcc_RocketBuyerLLCMember_label_en-US" xlink:label="lab_arcc_RocketBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rocket Buyer, LLC [Member]</link:label>
    <link:label id="lab_arcc_RocketBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_RocketBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rocket Buyer, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RocketBuyerLLCMember" xlink:href="arcc-20260930.xsd#arcc_RocketBuyerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RocketBuyerLLCMember" xlink:to="lab_arcc_RocketBuyerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AllAdjToCompMember_terseLabel_en-US" xlink:label="lab_ecd_AllAdjToCompMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Adjustments to Compensation</link:label>
    <link:label id="lab_ecd_AllAdjToCompMember_label_en-US" xlink:label="lab_ecd_AllAdjToCompMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Adjustments to Compensation [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllAdjToCompMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllAdjToCompMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="lab_ecd_AllAdjToCompMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BusinessAcquisitionAxis_01a17ad2-3371-7bd0-9255-a271b96d28ca_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination [Axis]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionAxis_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionAxis" xlink:to="lab_us-gaap_BusinessAcquisitionAxis" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_IncomeTaxPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_IncomeTaxPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPolicyTextBlock"/>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_019fed4d-3dd3-7bae-b0c3-4a802aff6f18_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by (used in) operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyFundedCommitments_019fed4d-3e56-7752-ad4c-0edce48598c9_negatedTerseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyFundedCommitments" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less: funded commitments</link:label>
    <link:label id="lab_arcc_InvestmentCompanyFundedCommitments_019fed4d-3e56-7e23-a7c9-7e67e365eec4_verboseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyFundedCommitments" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total capital funded</link:label>
    <link:label id="lab_arcc_InvestmentCompanyFundedCommitments_label_en-US" xlink:label="lab_arcc_InvestmentCompanyFundedCommitments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Funded Commitments</link:label>
    <link:label id="lab_arcc_InvestmentCompanyFundedCommitments_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyFundedCommitments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Funded Commitments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyFundedCommitments" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyFundedCommitments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyFundedCommitments" xlink:to="lab_arcc_InvestmentCompanyFundedCommitments" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractEUR2Member_019fed4d-3d42-70da-8d73-635349b219ec_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractEUR2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, EUR 2</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractEUR2Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractEUR2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, EUR 2 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractEUR2Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractEUR2Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, EUR 2</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractEUR2Member" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractEUR2Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractEUR2Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractEUR2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TSSBuyerLLCMember_019fed4d-3d42-7579-bc92-fb6cb998fab1_terseLabel_en-US" xlink:label="lab_arcc_TSSBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TSS Buyer, LLC</link:label>
    <link:label id="lab_arcc_TSSBuyerLLCMember_label_en-US" xlink:label="lab_arcc_TSSBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TSS Buyer, LLC [Member]</link:label>
    <link:label id="lab_arcc_TSSBuyerLLCMember_documentation_en-US" xlink:label="lab_arcc_TSSBuyerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TSS Buyer, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TSSBuyerLLCMember" xlink:href="arcc-20260930.xsd#arcc_TSSBuyerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TSSBuyerLLCMember" xlink:to="lab_arcc_TSSBuyerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EnergySectorMember_019fed4d-3dd3-74d3-a06b-07a9761c87b1_terseLabel_en-US" xlink:label="lab_us-gaap_EnergySectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Energy</link:label>
    <link:label id="lab_us-gaap_EnergySectorMember_label_en-US" xlink:label="lab_us-gaap_EnergySectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Energy Sector [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnergySectorMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnergySectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EnergySectorMember" xlink:to="lab_us-gaap_EnergySectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeStatementAbstract_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="lab_us-gaap_IncomeStatementAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_019fed4d-3e56-7a3e-9ca7-1f31df2530a7_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">STOCKHOLDERS&#8217; EQUITY</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity, Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityAbstract" xlink:to="lab_us-gaap_StockholdersEquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentTransitionReport_019fed4d-3d41-7c66-9867-dbcc974c6007_terseLabel_en-US" xlink:label="lab_dei_DocumentTransitionReport" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Transition Report</link:label>
    <link:label id="lab_dei_DocumentTransitionReport_label_en-US" xlink:label="lab_dei_DocumentTransitionReport" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Transition Report</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentTransitionReport" xlink:to="lab_dei_DocumentTransitionReport" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember_019fed4d-3d41-795c-a215-1e8b2622015d_terseLabel_en-US" xlink:label="lab_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Beacon Wellness Brands, Inc. and CDI Holdings I Corp.</link:label>
    <link:label id="lab_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember_label_en-US" xlink:label="lab_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Beacon Wellness Brands, Inc. and CDI Holdings I Corp. [Member]</link:label>
    <link:label id="lab_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember_documentation_en-US" xlink:label="lab_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Beacon Wellness Brands, Inc. and CDI Holdings I Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember" xlink:href="arcc-20260930.xsd#arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember" xlink:to="lab_arcc_BeaconWellnessBrandsIncAndCDIHoldingsICorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AllclearCommercialInc.AllclearMilitaryInc.AllclearSpaceInc.AndAllclearGroupLLCMember_019fed4d-3e56-7e59-9269-85af3ec4a32e_terseLabel_en-US" xlink:label="lab_arcc_AllclearCommercialInc.AllclearMilitaryInc.AllclearSpaceInc.AndAllclearGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allclear Commercial Inc., Allclear Military Inc., Allclear Space Inc., and Allclear Group LLC</link:label>
    <link:label id="lab_arcc_AllclearCommercialInc.AllclearMilitaryInc.AllclearSpaceInc.AndAllclearGroupLLCMember_label_en-US" xlink:label="lab_arcc_AllclearCommercialInc.AllclearMilitaryInc.AllclearSpaceInc.AndAllclearGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allclear Commercial Inc., Allclear Military Inc., Allclear Space Inc., and Allclear Group LLC [Member]</link:label>
    <link:label id="lab_arcc_AllclearCommercialInc.AllclearMilitaryInc.AllclearSpaceInc.AndAllclearGroupLLCMember_documentation_en-US" xlink:label="lab_arcc_AllclearCommercialInc.AllclearMilitaryInc.AllclearSpaceInc.AndAllclearGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Allclear Commercial Inc., Allclear Military Inc., Allclear Space Inc., and Allclear Group LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AllclearCommercialInc.AllclearMilitaryInc.AllclearSpaceInc.AndAllclearGroupLLCMember" xlink:href="arcc-20260930.xsd#arcc_AllclearCommercialInc.AllclearMilitaryInc.AllclearSpaceInc.AndAllclearGroupLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AllclearCommercialInc.AllclearMilitaryInc.AllclearSpaceInc.AndAllclearGroupLLCMember" xlink:to="lab_arcc_AllclearCommercialInc.AllclearMilitaryInc.AllclearSpaceInc.AndAllclearGroupLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WellingtonAltusFinancialInc.Member_019fed4d-3d42-70f8-b4e3-b1d752b46d4a_terseLabel_en-US" xlink:label="lab_arcc_WellingtonAltusFinancialInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wellington-Altus Financial Inc.</link:label>
    <link:label id="lab_arcc_WellingtonAltusFinancialInc.Member_label_en-US" xlink:label="lab_arcc_WellingtonAltusFinancialInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Wellington-Altus Financial Inc. [Member]</link:label>
    <link:label id="lab_arcc_WellingtonAltusFinancialInc.Member_documentation_en-US" xlink:label="lab_arcc_WellingtonAltusFinancialInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Wellington-Altus Financial Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WellingtonAltusFinancialInc.Member" xlink:href="arcc-20260930.xsd#arcc_WellingtonAltusFinancialInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WellingtonAltusFinancialInc.Member" xlink:to="lab_arcc_WellingtonAltusFinancialInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendIncomeOperatingPaidInKind_019fed4d-3dd3-771a-a77b-cb22859b1d8f_terseLabel_en-US" xlink:label="lab_us-gaap_DividendIncomeOperatingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PIK dividend income</link:label>
    <link:label id="lab_us-gaap_DividendIncomeOperatingPaidInKind_019fed4d-3dd3-7ba8-8175-852277fe31d4_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DividendIncomeOperatingPaidInKind" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">PIK dividends</link:label>
    <link:label id="lab_us-gaap_DividendIncomeOperatingPaidInKind_label_en-US" xlink:label="lab_us-gaap_DividendIncomeOperatingPaidInKind" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividend Income, Operating, Paid in Kind</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendIncomeOperatingPaidInKind" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendIncomeOperatingPaidInKind"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendIncomeOperatingPaidInKind" xlink:to="lab_us-gaap_DividendIncomeOperatingPaidInKind" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OperatingExpensesAbstract_019fed4d-3d42-7b20-a272-191b7cf9953d_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EXPENSES:</link:label>
    <link:label id="lab_us-gaap_OperatingExpensesAbstract_label_en-US" xlink:label="lab_us-gaap_OperatingExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Expenses [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingExpensesAbstract" xlink:to="lab_us-gaap_OperatingExpensesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_USMidAtlanticRegionMember_019fed4d-3dd3-7c7e-8e7c-45c0d8567c61_terseLabel_en-US" xlink:label="lab_arcc_USMidAtlanticRegionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mid-Atlantic</link:label>
    <link:label id="lab_arcc_USMidAtlanticRegionMember_label_en-US" xlink:label="lab_arcc_USMidAtlanticRegionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Mid-Atlantic Region [Member]</link:label>
    <link:label id="lab_arcc_USMidAtlanticRegionMember_documentation_en-US" xlink:label="lab_arcc_USMidAtlanticRegionMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">US Mid-Atlantic Region</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_USMidAtlanticRegionMember" xlink:href="arcc-20260930.xsd#arcc_USMidAtlanticRegionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_USMidAtlanticRegionMember" xlink:to="lab_arcc_USMidAtlanticRegionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HarveyToolCompanyLLCMember_019fed4d-3dd3-7672-8d83-2cc03803b3c6_terseLabel_en-US" xlink:label="lab_arcc_HarveyToolCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Harvey Tool Company, LLC</link:label>
    <link:label id="lab_arcc_HarveyToolCompanyLLCMember_label_en-US" xlink:label="lab_arcc_HarveyToolCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Harvey Tool Company, LLC [Member]</link:label>
    <link:label id="lab_arcc_HarveyToolCompanyLLCMember_documentation_en-US" xlink:label="lab_arcc_HarveyToolCompanyLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Harvey Tool Company, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HarveyToolCompanyLLCMember" xlink:href="arcc-20260930.xsd#arcc_HarveyToolCompanyLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HarveyToolCompanyLLCMember" xlink:to="lab_arcc_HarveyToolCompanyLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockAppreciationRightsSARSMember_terseLabel_en-US" xlink:label="lab_us-gaap_StockAppreciationRightsSARSMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Appreciation Rights (SARs)</link:label>
    <link:label id="lab_us-gaap_StockAppreciationRightsSARSMember_label_en-US" xlink:label="lab_us-gaap_StockAppreciationRightsSARSMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Appreciation Rights (SARs) [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockAppreciationRightsSARSMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockAppreciationRightsSARSMember" xlink:to="lab_us-gaap_StockAppreciationRightsSARSMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation_019fed4d-3dd3-7546-ae08-989a371e6a69_terseLabel_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate gross unrealized gain for federal tax purposes</link:label>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation_label_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Tax Basis, Unrealized Gain</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:to="lab_us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_A3StepSportsLLCMember_019fed4d-3e56-7441-bb7c-86da7d8370ba_terseLabel_en-US" xlink:label="lab_arcc_A3StepSportsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">3 Step Sports LLC</link:label>
    <link:label id="lab_arcc_A3StepSportsLLCMember_label_en-US" xlink:label="lab_arcc_A3StepSportsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">3 Step Sports LLC [Member]</link:label>
    <link:label id="lab_arcc_A3StepSportsLLCMember_documentation_en-US" xlink:label="lab_arcc_A3StepSportsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">3 Step Sports LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_A3StepSportsLLCMember" xlink:href="arcc-20260930.xsd#arcc_A3StepSportsLLCMember"/>
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    <link:label id="lab_arcc_DenaliIntermediateHoldingsInc.AndDenaliParentHoldingsL.PMember_019fed4d-3e56-7ce4-8fd8-7239c170c3aa_terseLabel_en-US" xlink:label="lab_arcc_DenaliIntermediateHoldingsInc.AndDenaliParentHoldingsL.PMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Denali Intermediate Holdings, Inc. and Denali Parent Holdings, L.P</link:label>
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    <link:label id="lab_arcc_LiveBarnInc.LiveBarnUSLLCLiveBarnCanadaIULCAndRoyalTopcoHoldingsLLCMember_019fed4d-3e56-7504-a5c2-418bbb8ffd0c_terseLabel_en-US" xlink:label="lab_arcc_LiveBarnInc.LiveBarnUSLLCLiveBarnCanadaIULCAndRoyalTopcoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LiveBarn Inc., LiveBarn US, LLC, LiveBarn Canada I, ULC, and Royal Topco Holdings, LLC</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicConcentrationRiskMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GeographicConcentrationRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeographicConcentrationRiskMember" xlink:to="lab_us-gaap_GeographicConcentrationRiskMember" xlink:type="arc" order="1"/>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsTextBlock" xlink:to="lab_us-gaap_SubsequentEventsTextBlock" xlink:type="arc" order="1"/>
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    <link:label id="lab_ecd_ForgoneRecoveryIndName_label_en-US" xlink:label="lab_ecd_ForgoneRecoveryIndName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forgone Recovery, Individual Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryIndName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ForgoneRecoveryIndName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ForgoneRecoveryIndName" xlink:to="lab_ecd_ForgoneRecoveryIndName" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SpruceBidcoIIInc.Member_019fed4d-3dd3-753e-b142-6d26f62aab49_terseLabel_en-US" xlink:label="lab_arcc_SpruceBidcoIIInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Spruce Bidco II Inc.</link:label>
    <link:label id="lab_arcc_SpruceBidcoIIInc.Member_label_en-US" xlink:label="lab_arcc_SpruceBidcoIIInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Spruce Bidco II Inc. [Member]</link:label>
    <link:label id="lab_arcc_SpruceBidcoIIInc.Member_documentation_en-US" xlink:label="lab_arcc_SpruceBidcoIIInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Spruce Bidco II Inc.</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_TelleTireAutoServiceLLCAndNextHorizonCapitalTireCoSPVLPMember" xlink:href="arcc-20260930.xsd#arcc_TelleTireAutoServiceLLCAndNextHorizonCapitalTireCoSPVLPMember"/>
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    <link:label id="lab_ecd_NonGaapMeasureDescriptionTextBlock_label_en-US" xlink:label="lab_ecd_NonGaapMeasureDescriptionTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-GAAP Measure Description [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonGaapMeasureDescriptionTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonGaapMeasureDescriptionTextBlock"/>
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    <link:label id="lab_arcc_ConsilioMidcoLimitedCompusoftUSLLCAndConsilioInvestmentHoldingsLPMember_019fed4d-3dd3-7111-b3c6-a07072c0a086_terseLabel_en-US" xlink:label="lab_arcc_ConsilioMidcoLimitedCompusoftUSLLCAndConsilioInvestmentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consilio Midco Limited, Compusoft US LLC, and Consilio Investment Holdings, L.P.</link:label>
    <link:label id="lab_arcc_ConsilioMidcoLimitedCompusoftUSLLCAndConsilioInvestmentHoldingsLPMember_label_en-US" xlink:label="lab_arcc_ConsilioMidcoLimitedCompusoftUSLLCAndConsilioInvestmentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consilio Midco Limited, Compusoft US LLC, and Consilio Investment Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_ConsilioMidcoLimitedCompusoftUSLLCAndConsilioInvestmentHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_ConsilioMidcoLimitedCompusoftUSLLCAndConsilioInvestmentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Consilio Midco Limited, Compusoft US LLC, and Consilio Investment Holdings, L.P.</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ConsilioMidcoLimitedCompusoftUSLLCAndConsilioInvestmentHoldingsLPMember" xlink:to="lab_arcc_ConsilioMidcoLimitedCompusoftUSLLCAndConsilioInvestmentHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember_019fed4d-3d42-7d56-a650-db5731ca5801_terseLabel_en-US" xlink:label="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GTCR F Buyer Corp. and GTCR (D) Investors LP</link:label>
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    <link:label id="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember_documentation_en-US" xlink:label="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GTCR F Buyer Corp. and GTCR (D) Investors LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember" xlink:href="arcc-20260930.xsd#arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember" xlink:to="lab_arcc_GTCRFBuyerCorpAndGTCRDInvestorsLPMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_CPProgramMember_documentation_en-US" xlink:label="lab_arcc_CPProgramMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">CP Program</link:label>
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    <link:label id="lab_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_019fed4d-3dd3-744e-ba5d-3263fdd5f4e7_terseLabel_en-US" xlink:label="lab_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate</link:label>
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    <link:label id="lab_arcc_CardsLiveOakHoldingsInc.Member_019fed4d-3dd3-7bd7-a3f2-d9305835f293_terseLabel_en-US" xlink:label="lab_arcc_CardsLiveOakHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cards-Live Oak Holdings, Inc.</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_arcc_CardsLiveOakHoldingsInc.Member" xlink:href="arcc-20260930.xsd#arcc_CardsLiveOakHoldingsInc.Member"/>
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    <link:label id="lab_arcc_October2036CLOSecuredLoansMember_documentation_en-US" xlink:label="lab_arcc_October2036CLOSecuredLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">October 2036 CLO Secured Loans</link:label>
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    <link:label id="lab_us-gaap_InvestmentCompanyMarketValuePerShare_019fed4d-3dd3-7aa2-932f-3e971252e1ed_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyMarketValuePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Per share market value at end of period (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyMarketValuePerShare_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyMarketValuePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Market Value, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyMarketValuePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyMarketValuePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyMarketValuePerShare" xlink:to="lab_us-gaap_InvestmentCompanyMarketValuePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GHXUltimateParentCorporationCommerceParentIncAndCommerceTopcoLLCMember_019fed4d-3d42-746c-99a6-12cade3123ad_terseLabel_en-US" xlink:label="lab_arcc_GHXUltimateParentCorporationCommerceParentIncAndCommerceTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GHX Ultimate Parent Corporation, Commerce Parent, Inc. and Commerce Topco, LLC</link:label>
    <link:label id="lab_arcc_GHXUltimateParentCorporationCommerceParentIncAndCommerceTopcoLLCMember_label_en-US" xlink:label="lab_arcc_GHXUltimateParentCorporationCommerceParentIncAndCommerceTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GHX Ultimate Parent Corporation, Commerce Parent, Inc. and Commerce Topco, LLC [Member]</link:label>
    <link:label id="lab_arcc_GHXUltimateParentCorporationCommerceParentIncAndCommerceTopcoLLCMember_documentation_en-US" xlink:label="lab_arcc_GHXUltimateParentCorporationCommerceParentIncAndCommerceTopcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GHX Ultimate Parent Corporation, Commerce Parent, Inc. and Commerce Topco, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GHXUltimateParentCorporationCommerceParentIncAndCommerceTopcoLLCMember" xlink:href="arcc-20260930.xsd#arcc_GHXUltimateParentCorporationCommerceParentIncAndCommerceTopcoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GHXUltimateParentCorporationCommerceParentIncAndCommerceTopcoLLCMember" xlink:to="lab_arcc_GHXUltimateParentCorporationCommerceParentIncAndCommerceTopcoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember_019fed4d-3e56-791c-8d13-d115c7218623_terseLabel_en-US" xlink:label="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Raptor Technologies, LLC, Sycamore Bidco LTD and Rocket Parent, LLC</link:label>
    <link:label id="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember_label_en-US" xlink:label="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Raptor Technologies, LLC, Sycamore Bidco LTD and Rocket Parent, LLC [Member]</link:label>
    <link:label id="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember_documentation_en-US" xlink:label="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Raptor Technologies, LLC, Sycamore Bidco LTD and Rocket Parent, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:href="arcc-20260930.xsd#arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:to="lab_arcc_RaptorTechnologiesLLCSycamoreBidcoLTDAndRocketParentLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SVNewco2Inc.AndSite2020IncorporatedMember_019fed4d-3dd3-7045-930c-709f2cbbe27c_terseLabel_en-US" xlink:label="lab_arcc_SVNewco2Inc.AndSite2020IncorporatedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SV Newco 2, Inc. and Site 2020 Incorporated</link:label>
    <link:label id="lab_arcc_SVNewco2Inc.AndSite2020IncorporatedMember_label_en-US" xlink:label="lab_arcc_SVNewco2Inc.AndSite2020IncorporatedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SV Newco 2, Inc. and Site 2020 Incorporated [Member]</link:label>
    <link:label id="lab_arcc_SVNewco2Inc.AndSite2020IncorporatedMember_documentation_en-US" xlink:label="lab_arcc_SVNewco2Inc.AndSite2020IncorporatedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SV Newco 2, Inc. and Site 2020 Incorporated</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SVNewco2Inc.AndSite2020IncorporatedMember" xlink:href="arcc-20260930.xsd#arcc_SVNewco2Inc.AndSite2020IncorporatedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SVNewco2Inc.AndSite2020IncorporatedMember" xlink:to="lab_arcc_SVNewco2Inc.AndSite2020IncorporatedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_VPPIntermediateHoldingsLLCAndVPPGroupHoldingsLPMember_019fed4d-3d42-7058-8d5d-ae163f5a8b0e_terseLabel_en-US" xlink:label="lab_arcc_VPPIntermediateHoldingsLLCAndVPPGroupHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">VPP Intermediate Holdings, LLC and VPP Group Holdings, L.P.</link:label>
    <link:label id="lab_arcc_VPPIntermediateHoldingsLLCAndVPPGroupHoldingsLPMember_label_en-US" xlink:label="lab_arcc_VPPIntermediateHoldingsLLCAndVPPGroupHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">VPP Intermediate Holdings, LLC and VPP Group Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_VPPIntermediateHoldingsLLCAndVPPGroupHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_VPPIntermediateHoldingsLLCAndVPPGroupHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">VPP Intermediate Holdings, LLC and VPP Group Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_VPPIntermediateHoldingsLLCAndVPPGroupHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_VPPIntermediateHoldingsLLCAndVPPGroupHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_VPPIntermediateHoldingsLLCAndVPPGroupHoldingsLPMember" xlink:to="lab_arcc_VPPIntermediateHoldingsLLCAndVPPGroupHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BayMarkHealthServicesInc.AndNewBayMarkParentLLCMember_01a159ca-44e5-7f98-8f69-7178f2a52ecc_terseLabel_en-US" xlink:label="lab_arcc_BayMarkHealthServicesInc.AndNewBayMarkParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BayMark Health Services, Inc. and New BayMark Parent, LLC</link:label>
    <link:label id="lab_arcc_BayMarkHealthServicesInc.AndNewBayMarkParentLLCMember_label_en-US" xlink:label="lab_arcc_BayMarkHealthServicesInc.AndNewBayMarkParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BayMark Health Services, Inc. and New BayMark Parent, LLC [Member]</link:label>
    <link:label id="lab_arcc_BayMarkHealthServicesInc.AndNewBayMarkParentLLCMember_documentation_en-US" xlink:label="lab_arcc_BayMarkHealthServicesInc.AndNewBayMarkParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">BayMark Health Services, Inc. and New BayMark Parent, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BayMarkHealthServicesInc.AndNewBayMarkParentLLCMember" xlink:href="arcc-20260930.xsd#arcc_BayMarkHealthServicesInc.AndNewBayMarkParentLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BayMarkHealthServicesInc.AndNewBayMarkParentLLCMember" xlink:to="lab_arcc_BayMarkHealthServicesInc.AndNewBayMarkParentLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioOneMember_01a17ad2-3371-7274-ab2a-93ecbb6342b8_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario One</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioOneMember_label_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario One [Member]</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioOneMember_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioOneMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationClosingPriceScenarioOneMember" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationClosingPriceScenarioOneMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationClosingPriceScenarioOneMember" xlink:to="lab_arcc_BusinessCombinationClosingPriceScenarioOneMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EMBPurchaserInc.Member_019fed4d-3d42-7dae-8e5c-ddc59e5ea3b7_terseLabel_en-US" xlink:label="lab_arcc_EMBPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EMB Purchaser, Inc.</link:label>
    <link:label id="lab_arcc_EMBPurchaserInc.Member_label_en-US" xlink:label="lab_arcc_EMBPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EMB Purchaser, Inc. [Member]</link:label>
    <link:label id="lab_arcc_EMBPurchaserInc.Member_documentation_en-US" xlink:label="lab_arcc_EMBPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EMB Purchaser, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EMBPurchaserInc.Member" xlink:href="arcc-20260930.xsd#arcc_EMBPurchaserInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EMBPurchaserInc.Member" xlink:to="lab_arcc_EMBPurchaserInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ExcelFitnessConsolidatorLLCHealthBuyerLLCAndExcelFitnessHoldingsInc.Member_019fed4d-3e56-7592-894a-9a718305d1fd_terseLabel_en-US" xlink:label="lab_arcc_ExcelFitnessConsolidatorLLCHealthBuyerLLCAndExcelFitnessHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Excel Fitness Consolidator LLC, Health Buyer LLC and Excel Fitness Holdings, Inc.</link:label>
    <link:label id="lab_arcc_ExcelFitnessConsolidatorLLCHealthBuyerLLCAndExcelFitnessHoldingsInc.Member_label_en-US" xlink:label="lab_arcc_ExcelFitnessConsolidatorLLCHealthBuyerLLCAndExcelFitnessHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Excel Fitness Consolidator LLC, Health Buyer LLC and Excel Fitness Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ExcelFitnessConsolidatorLLCHealthBuyerLLCAndExcelFitnessHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_ExcelFitnessConsolidatorLLCHealthBuyerLLCAndExcelFitnessHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Excel Fitness Consolidator LLC, Health Buyer LLC and Excel Fitness Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ExcelFitnessConsolidatorLLCHealthBuyerLLCAndExcelFitnessHoldingsInc.Member" xlink:href="arcc-20260930.xsd#arcc_ExcelFitnessConsolidatorLLCHealthBuyerLLCAndExcelFitnessHoldingsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ExcelFitnessConsolidatorLLCHealthBuyerLLCAndExcelFitnessHoldingsInc.Member" xlink:to="lab_arcc_ExcelFitnessConsolidatorLLCHealthBuyerLLCAndExcelFitnessHoldingsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BeehiveAcquisitionCorp.AndBeehiveUltimateHoldingsL.P.Member_01a159ca-c881-73b3-81c1-b1a5dae389dd_terseLabel_en-US" xlink:label="lab_arcc_BeehiveAcquisitionCorp.AndBeehiveUltimateHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Beehive Acquisition Corp. and Beehive Ultimate Holdings, L.P.</link:label>
    <link:label id="lab_arcc_BeehiveAcquisitionCorp.AndBeehiveUltimateHoldingsL.P.Member_label_en-US" xlink:label="lab_arcc_BeehiveAcquisitionCorp.AndBeehiveUltimateHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Beehive Acquisition Corp. and Beehive Ultimate Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_BeehiveAcquisitionCorp.AndBeehiveUltimateHoldingsL.P.Member_documentation_en-US" xlink:label="lab_arcc_BeehiveAcquisitionCorp.AndBeehiveUltimateHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Beehive Acquisition Corp. and Beehive Ultimate Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BeehiveAcquisitionCorp.AndBeehiveUltimateHoldingsL.P.Member" xlink:href="arcc-20260930.xsd#arcc_BeehiveAcquisitionCorp.AndBeehiveUltimateHoldingsL.P.Member"/>
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    <link:label id="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilities_019fed4d-3dd3-7d11-bc86-841d9a57b7af_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable and other liabilities</link:label>
    <link:label id="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilities_label_en-US" xlink:label="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Payable and Other Accrued Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndOtherAccruedLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableAndOtherAccruedLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsPayableAndOtherAccruedLiabilities" xlink:to="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_019fed4d-3e56-72a7-aece-23598f627e01_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Other assets</link:label>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019fed4d-3e56-787c-9dbc-96ddadb70fe5_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Issuances of common stock (net of offering and underwriting costs) (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, New Issues</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
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    <link:label id="lab_us-gaap_InvestmentOwnedBalancePrincipalAmount_019fed4d-3dd3-7ce8-9fe7-eb777e5814e8_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Principal</link:label>
    <link:label id="lab_us-gaap_InvestmentOwnedBalancePrincipalAmount_label_en-US" xlink:label="lab_us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Balance, Principal Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:to="lab_us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TelecommunicationServicesMember_019fed4d-3e56-7a18-8179-3dd1edfab675_terseLabel_en-US" xlink:label="lab_arcc_TelecommunicationServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Telecommunication Services</link:label>
    <link:label id="lab_arcc_TelecommunicationServicesMember_label_en-US" xlink:label="lab_arcc_TelecommunicationServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Telecommunication Services [Member]</link:label>
    <link:label id="lab_arcc_TelecommunicationServicesMember_documentation_en-US" xlink:label="lab_arcc_TelecommunicationServicesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Telecommunication Services</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TelecommunicationServicesMember" xlink:href="arcc-20260930.xsd#arcc_TelecommunicationServicesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TelecommunicationServicesMember" xlink:to="lab_arcc_TelecommunicationServicesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_019fed4d-3e56-7da5-82b0-556a1d2601d1_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement Basis [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_label_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Basis [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis" xlink:to="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_019fed4d-3d42-70e8-baeb-4921a528cf49_terseLabel_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax cost basis</link:label>
    <link:label id="lab_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_label_en-US" xlink:label="lab_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Tax Basis, Cost</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:to="lab_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ExcludingInterestRateSwapMember_01a16a54-f25f-75b0-bae8-e34add07db96_terseLabel_en-US" xlink:label="lab_arcc_ExcludingInterestRateSwapMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Excluding Interest Rate Swap</link:label>
    <link:label id="lab_arcc_ExcludingInterestRateSwapMember_label_en-US" xlink:label="lab_arcc_ExcludingInterestRateSwapMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Excluding Interest Rate Swap [Member]</link:label>
    <link:label id="lab_arcc_ExcludingInterestRateSwapMember_documentation_en-US" xlink:label="lab_arcc_ExcludingInterestRateSwapMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Excluding Interest Rate Swap</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ExcludingInterestRateSwapMember" xlink:href="arcc-20260930.xsd#arcc_ExcludingInterestRateSwapMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ExcludingInterestRateSwapMember" xlink:to="lab_arcc_ExcludingInterestRateSwapMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember_019fed4d-3e56-72e3-a163-cd5231f398f9_terseLabel_en-US" xlink:label="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wellington Bidco Inc. and Wellington TopCo LP</link:label>
    <link:label id="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember_label_en-US" xlink:label="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Wellington Bidco Inc. and Wellington TopCo LP [Member]</link:label>
    <link:label id="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember_documentation_en-US" xlink:label="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Wellington Bidco Inc. and Wellington TopCo LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:href="arcc-20260930.xsd#arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:to="lab_arcc_WellingtonBidcoInc.AndWellingtonTopCoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_019fed4d-3dd3-773a-a938-23faf891c798_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:to="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member_019fed4d-3dd3-74eb-8cd0-1ee90be98025_terseLabel_en-US" xlink:label="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Creek Parent, Inc. and Creek Feeder, L.P.</link:label>
    <link:label id="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member_label_en-US" xlink:label="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Creek Parent, Inc. and Creek Feeder, L.P. [Member]</link:label>
    <link:label id="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member_documentation_en-US" xlink:label="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Creek Parent, Inc. and Creek Feeder, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:href="arcc-20260930.xsd#arcc_CreekParentInc.AndCreekFeederL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:to="lab_arcc_CreekParentInc.AndCreekFeederL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MSISHoldingsInc.AndMSPrecisionParentLPMember_019fed4d-3e56-796e-929a-efad2e6c1ec1_terseLabel_en-US" xlink:label="lab_arcc_MSISHoldingsInc.AndMSPrecisionParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MSIS Holdings, Inc. and MS Precision Parent, LP,</link:label>
    <link:label id="lab_arcc_MSISHoldingsInc.AndMSPrecisionParentLPMember_label_en-US" xlink:label="lab_arcc_MSISHoldingsInc.AndMSPrecisionParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MSIS Holdings, Inc. and MS Precision Parent, LP, [Member]</link:label>
    <link:label id="lab_arcc_MSISHoldingsInc.AndMSPrecisionParentLPMember_documentation_en-US" xlink:label="lab_arcc_MSISHoldingsInc.AndMSPrecisionParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MSIS Holdings, Inc. and MS Precision Parent, LP,</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MSISHoldingsInc.AndMSPrecisionParentLPMember" xlink:href="arcc-20260930.xsd#arcc_MSISHoldingsInc.AndMSPrecisionParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MSISHoldingsInc.AndMSPrecisionParentLPMember" xlink:to="lab_arcc_MSISHoldingsInc.AndMSPrecisionParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ADLCLO7DebtSecuritizationMember_019fed4d-3e56-72d0-aad4-3046f4d94d29_terseLabel_en-US" xlink:label="lab_arcc_ADLCLO7DebtSecuritizationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ADL CLO 7 Debt Securitization</link:label>
    <link:label id="lab_arcc_ADLCLO7DebtSecuritizationMember_label_en-US" xlink:label="lab_arcc_ADLCLO7DebtSecuritizationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ADL CLO 7 Debt Securitization [Member]</link:label>
    <link:label id="lab_arcc_ADLCLO7DebtSecuritizationMember_documentation_en-US" xlink:label="lab_arcc_ADLCLO7DebtSecuritizationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ADL CLO 7 Debt Securitization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ADLCLO7DebtSecuritizationMember" xlink:href="arcc-20260930.xsd#arcc_ADLCLO7DebtSecuritizationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ADLCLO7DebtSecuritizationMember" xlink:to="lab_arcc_ADLCLO7DebtSecuritizationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_July2026NotesMember_019fed4d-3dd3-7900-8d6e-61ca59970854_verboseLabel_en-US" xlink:label="lab_arcc_July2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">July 2026 Notes</link:label>
    <link:label id="lab_arcc_July2026NotesMember_019fed4d-3dd3-7b3f-bce7-7726720fea50_terseLabel_en-US" xlink:label="lab_arcc_July2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 2026 Notes (principal amount outstanding of $0 and $1,000, respectively)</link:label>
    <link:label id="lab_arcc_July2026NotesMember_label_en-US" xlink:label="lab_arcc_July2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">July 2026 Notes [Member]</link:label>
    <link:label id="lab_arcc_July2026NotesMember_documentation_en-US" xlink:label="lab_arcc_July2026NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">July 2026 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_July2026NotesMember" xlink:href="arcc-20260930.xsd#arcc_July2026NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_July2026NotesMember" xlink:to="lab_arcc_July2026NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FlexeraSoftwareLLCMember_019fed4d-3e55-7303-8fa4-46b7fe0a0dcf_terseLabel_en-US" xlink:label="lab_arcc_FlexeraSoftwareLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Flexera Software LLC</link:label>
    <link:label id="lab_arcc_FlexeraSoftwareLLCMember_label_en-US" xlink:label="lab_arcc_FlexeraSoftwareLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Flexera Software LLC [Member]</link:label>
    <link:label id="lab_arcc_FlexeraSoftwareLLCMember_documentation_en-US" xlink:label="lab_arcc_FlexeraSoftwareLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Flexera Software LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FlexeraSoftwareLLCMember" xlink:href="arcc-20260930.xsd#arcc_FlexeraSoftwareLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FlexeraSoftwareLLCMember" xlink:to="lab_arcc_FlexeraSoftwareLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LineOfCreditFacilityPercentageOfCommitment_019fed4d-3dd3-74a2-8c8b-d9bda459082d_terseLabel_en-US" xlink:label="lab_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of total commitment under line of credit</link:label>
    <link:label id="lab_arcc_LineOfCreditFacilityPercentageOfCommitment_label_en-US" xlink:label="lab_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Percentage Of Commitment</link:label>
    <link:label id="lab_arcc_LineOfCreditFacilityPercentageOfCommitment_documentation_en-US" xlink:label="lab_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Percentage Of Commitment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:href="arcc-20260930.xsd#arcc_LineOfCreditFacilityPercentageOfCommitment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:to="lab_arcc_LineOfCreditFacilityPercentageOfCommitment" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member_019fed4d-3dd3-730e-955e-ff7df3c79244_terseLabel_en-US" xlink:label="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Quick Quack Car Wash Holdings, LLC and KKR Game Changer Co-Invest Feeder II L.P.</link:label>
    <link:label id="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member_label_en-US" xlink:label="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Quick Quack Car Wash Holdings, LLC and KKR Game Changer Co-Invest Feeder II L.P. [Member]</link:label>
    <link:label id="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member_documentation_en-US" xlink:label="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Quick Quack Car Wash Holdings, LLC and KKR Game Changer Co-Invest Feeder II L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:href="arcc-20260930.xsd#arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:to="lab_arcc_QuickQuackCarWashHoldingsLLCAndKKRGameChangerCoInvestFeederIIL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_019fed4d-3dd3-7c2c-8595-3c5ae914bfcb_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeDomain" xlink:to="lab_us-gaap_SubsequentEventTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_019fed4d-3e56-7a27-b799-91eef7ad8853_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average stated interest rate</link:label>
    <link:label id="lab_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_label_en-US" xlink:label="lab_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Weighted Average Interest Rate, over Time</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtWeightedAverageInterestRateOverTime"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime" xlink:to="lab_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyAbstract_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyAbstract" xlink:to="lab_us-gaap_InvestmentCompanyAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OdevoABMember_01a15e38-0572-787e-a51b-efe3d0e26147_terseLabel_en-US" xlink:label="lab_arcc_OdevoABMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Odevo AB</link:label>
    <link:label id="lab_arcc_OdevoABMember_label_en-US" xlink:label="lab_arcc_OdevoABMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Odevo AB [Member]</link:label>
    <link:label id="lab_arcc_OdevoABMember_documentation_en-US" xlink:label="lab_arcc_OdevoABMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Odevo AB</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OdevoABMember" xlink:href="arcc-20260930.xsd#arcc_OdevoABMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OdevoABMember" xlink:to="lab_arcc_OdevoABMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ErrCompRecoveryTable_terseLabel_en-US" xlink:label="lab_ecd_ErrCompRecoveryTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Erroneously Awarded Compensation Recovery</link:label>
    <link:label id="lab_ecd_ErrCompRecoveryTable_label_en-US" xlink:label="lab_ecd_ErrCompRecoveryTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Erroneously Awarded Compensation Recovery [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ErrCompRecoveryTable" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ErrCompRecoveryTable"/>
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    <link:label id="lab_arcc_BulabHoldingsInc.AndBuckmanPPCCoInvestLPMember_019fed4d-3dd3-7179-954f-eaee3f48aa27_terseLabel_en-US" xlink:label="lab_arcc_BulabHoldingsInc.AndBuckmanPPCCoInvestLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bulab Holdings, Inc. and Buckman PPC Co-Invest LP</link:label>
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    <link:label id="lab_arcc_LeagueOneVolleyballClubsLLCAndLeagueOneVolleyballInc.Member_019fed4d-3d42-7ae5-99d3-0a1950b5607d_terseLabel_en-US" xlink:label="lab_arcc_LeagueOneVolleyballClubsLLCAndLeagueOneVolleyballInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">League One Volleyball Clubs, LLC and League One Volleyball, Inc.</link:label>
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    <link:label id="lab_arcc_AlternateBaseRateMember_019fed4d-3e56-7147-b33e-3644a5a54e4f_terseLabel_en-US" xlink:label="lab_arcc_AlternateBaseRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alternate Base Rate</link:label>
    <link:label id="lab_arcc_AlternateBaseRateMember_label_en-US" xlink:label="lab_arcc_AlternateBaseRateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Alternate Base Rate [Member]</link:label>
    <link:label id="lab_arcc_AlternateBaseRateMember_documentation_en-US" xlink:label="lab_arcc_AlternateBaseRateMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Alternate Base Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AlternateBaseRateMember" xlink:href="arcc-20260930.xsd#arcc_AlternateBaseRateMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AlternateBaseRateMember" xlink:to="lab_arcc_AlternateBaseRateMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplierPercent_label_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplierPercent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Dividend Adjusted Price, Multiplier, Percent</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplierPercent_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplierPercent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Dividend Adjusted Price, Multiplier, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplierPercent" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationClosingPriceDividendAdjustedPriceMultiplierPercent"/>
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    <link:label id="lab_arcc_July2038ClassA1RCLONotesMember_01a07fc9-1575-7ac6-b8cd-24bfb5552ede_terseLabel_en-US" xlink:label="lab_arcc_July2038ClassA1RCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 2038 Class A-1-R CLO Notes</link:label>
    <link:label id="lab_arcc_July2038ClassA1RCLONotesMember_label_en-US" xlink:label="lab_arcc_July2038ClassA1RCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">July 2038 Class A-1-R CLO Notes [Member]</link:label>
    <link:label id="lab_arcc_July2038ClassA1RCLONotesMember_documentation_en-US" xlink:label="lab_arcc_July2038ClassA1RCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">July 2038 Class A-1-R CLO Notes</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_019fed4d-3dd3-72f2-9454-ca94e505b717_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Three</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Three [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPeriodThreeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfStockholdersEquityTableTextBlock_019fed4d-3dd3-7826-ba08-370616295976_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfStockholdersEquityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Common Shares Issued and Sold</link:label>
    <link:label id="lab_us-gaap_ScheduleOfStockholdersEquityTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfStockholdersEquityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Stockholders Equity [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockholdersEquityTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfStockholdersEquityTableTextBlock"/>
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    <link:label id="lab_arcc_ExpenseReimbursementMember_019fed4d-3e56-7392-84dc-0856c3995bb5_terseLabel_en-US" xlink:label="lab_arcc_ExpenseReimbursementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expense Reimbursement</link:label>
    <link:label id="lab_arcc_ExpenseReimbursementMember_label_en-US" xlink:label="lab_arcc_ExpenseReimbursementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Expense Reimbursement [Member]</link:label>
    <link:label id="lab_arcc_ExpenseReimbursementMember_documentation_en-US" xlink:label="lab_arcc_ExpenseReimbursementMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Expense Reimbursement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ExpenseReimbursementMember" xlink:href="arcc-20260930.xsd#arcc_ExpenseReimbursementMember"/>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019fed4d-3dd3-7716-98d4-0f585e5b91af_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of unused portion of line of credit commitment</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Unused Capacity, Commitment Fee Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
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    <link:label id="lab_us-gaap_SharesIssuedPricePerShare_019fed4d-3d42-79b4-a2e7-234a34582eb7_terseLabel_en-US" xlink:label="lab_us-gaap_SharesIssuedPricePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average issue price per share (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_SharesIssuedPricePerShare_label_en-US" xlink:label="lab_us-gaap_SharesIssuedPricePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shares Issued, Price Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssuedPricePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesIssuedPricePerShare"/>
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    <link:label id="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019fed4d-3e56-7467-b86c-23188c4ee0ac_terseLabel_en-US" xlink:label="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Instruments [Domain]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
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    <link:label id="lab_arcc_AlcrestaTherapeuticsInc.Member_019fed4d-3e56-7e35-a9ef-bef719b56f49_terseLabel_en-US" xlink:label="lab_arcc_AlcrestaTherapeuticsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alcresta Therapeutics, Inc.</link:label>
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    <link:label id="lab_us-gaap_OtherIncome_019fed4d-3e56-7951-b445-60260863af89_terseLabel_en-US" xlink:label="lab_us-gaap_OtherIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other income</link:label>
    <link:label id="lab_us-gaap_OtherIncome_019fed4d-3e56-7b61-b5ae-53dec9ab6066_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherIncome" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Management fees and other income</link:label>
    <link:label id="lab_us-gaap_OtherIncome_label_en-US" xlink:label="lab_us-gaap_OtherIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncome" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherIncome"/>
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    <link:label id="lab_us-gaap_DerivativeAssets_019fed4d-3e56-7971-b34c-7a4189514963_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative assets</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssets" xlink:to="lab_us-gaap_DerivativeAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CrossCountryMortgageLLCAndCrossCountryHoldcoLLCMember_019fed4d-3d42-78b8-8f57-62802c8d3ace_terseLabel_en-US" xlink:label="lab_arcc_CrossCountryMortgageLLCAndCrossCountryHoldcoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CrossCountry Mortgage, LLC and CrossCountry Holdco, LLC</link:label>
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    <link:label id="lab_ecd_AwardUndrlygSecuritiesAmt_terseLabel_en-US" xlink:label="lab_ecd_AwardUndrlygSecuritiesAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Underlying Securities</link:label>
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    <link:label id="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019fed4d-3dd3-7484-bcf5-154a2c990d14_terseLabel_en-US" xlink:label="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair value</link:label>
    <link:label id="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_label_en-US" xlink:label="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Estimate of Fair Value Measurement [Member]</link:label>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_019fed4d-3dd3-71bd-85ef-f494b1bd5736_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuances of common stock (net of offering and underwriting costs)</link:label>
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    <link:label id="lab_arcc_NordicFerryInfrastructureASMember_019fed4d-3e56-7900-88a3-4c98d4b76ae4_terseLabel_en-US" xlink:label="lab_arcc_NordicFerryInfrastructureASMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nordic Ferry Infrastructure AS</link:label>
    <link:label id="lab_arcc_NordicFerryInfrastructureASMember_label_en-US" xlink:label="lab_arcc_NordicFerryInfrastructureASMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nordic Ferry Infrastructure AS [Member]</link:label>
    <link:label id="lab_arcc_NordicFerryInfrastructureASMember_documentation_en-US" xlink:label="lab_arcc_NordicFerryInfrastructureASMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Nordic Ferry Infrastructure AS</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NordicFerryInfrastructureASMember" xlink:href="arcc-20260930.xsd#arcc_NordicFerryInfrastructureASMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NordicFerryInfrastructureASMember" xlink:to="lab_arcc_NordicFerryInfrastructureASMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock_019fed4d-3e56-7049-87c7-d399d4b44a7b_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Financial Highlights</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Highlights [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock" xlink:to="lab_us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MonicaHoldcoUSIncMember_019fed4d-3dd3-7eb4-af94-e4b184106f2c_terseLabel_en-US" xlink:label="lab_arcc_MonicaHoldcoUSIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Monica Holdco (US) Inc.</link:label>
    <link:label id="lab_arcc_MonicaHoldcoUSIncMember_label_en-US" xlink:label="lab_arcc_MonicaHoldcoUSIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Monica Holdco (US) Inc. [Member]</link:label>
    <link:label id="lab_arcc_MonicaHoldcoUSIncMember_documentation_en-US" xlink:label="lab_arcc_MonicaHoldcoUSIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Monica Holdco (US) Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MonicaHoldcoUSIncMember" xlink:href="arcc-20260930.xsd#arcc_MonicaHoldcoUSIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MonicaHoldcoUSIncMember" xlink:to="lab_arcc_MonicaHoldcoUSIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PreferredStockMember_019fed4d-3d42-7fc4-a888-1299ecbfdbc4_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred equity</link:label>
    <link:label id="lab_us-gaap_PreferredStockMember_label_en-US" xlink:label="lab_us-gaap_PreferredStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockMember" xlink:to="lab_us-gaap_PreferredStockMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNOKMember_019fed4d-3e56-77dc-ab5e-0cf5c504dc96_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNOKMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, NOK 1</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNOKMember_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNOKMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, NOK [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNOKMember_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNOKMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, NOK</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractNOKMember" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractNOKMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractNOKMember" xlink:to="lab_arcc_ForeignCurrencyForwardContractNOKMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_HealthcareSectorMember_019fed4d-3e56-7929-a32d-7bd16ee108c3_terseLabel_en-US" xlink:label="lab_us-gaap_HealthcareSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Health Care Equipment and Services</link:label>
    <link:label id="lab_us-gaap_HealthcareSectorMember_label_en-US" xlink:label="lab_us-gaap_HealthcareSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Healthcare Sector [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HealthcareSectorMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HealthcareSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HealthcareSectorMember" xlink:to="lab_us-gaap_HealthcareSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PikeCorporationMember_01a158e6-2c6d-78e0-9858-1ab41941c183_terseLabel_en-US" xlink:label="lab_arcc_PikeCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pike Corporation</link:label>
    <link:label id="lab_arcc_PikeCorporationMember_label_en-US" xlink:label="lab_arcc_PikeCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pike Corporation [Member]</link:label>
    <link:label id="lab_arcc_PikeCorporationMember_documentation_en-US" xlink:label="lab_arcc_PikeCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pike Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PikeCorporationMember" xlink:href="arcc-20260930.xsd#arcc_PikeCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PikeCorporationMember" xlink:to="lab_arcc_PikeCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DigicertInc.DcertBuyerInc.DCertPreferredHoldingsInc.AndDestinyDigitalHoldingsL.P.Member_019fed4d-3e56-78c1-ba31-0a558566ccb1_terseLabel_en-US" xlink:label="lab_arcc_DigicertInc.DcertBuyerInc.DCertPreferredHoldingsInc.AndDestinyDigitalHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Digicert, Inc., Dcert Buyer, Inc., DCert Preferred Holdings, Inc. and Destiny Digital Holdings, L.P.</link:label>
    <link:label id="lab_arcc_DigicertInc.DcertBuyerInc.DCertPreferredHoldingsInc.AndDestinyDigitalHoldingsL.P.Member_label_en-US" xlink:label="lab_arcc_DigicertInc.DcertBuyerInc.DCertPreferredHoldingsInc.AndDestinyDigitalHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Digicert, Inc., Dcert Buyer, Inc., DCert Preferred Holdings, Inc. and Destiny Digital Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_DigicertInc.DcertBuyerInc.DCertPreferredHoldingsInc.AndDestinyDigitalHoldingsL.P.Member_documentation_en-US" xlink:label="lab_arcc_DigicertInc.DcertBuyerInc.DCertPreferredHoldingsInc.AndDestinyDigitalHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Digicert, Inc., Dcert Buyer, Inc., DCert Preferred Holdings, Inc. and Destiny Digital Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DigicertInc.DcertBuyerInc.DCertPreferredHoldingsInc.AndDestinyDigitalHoldingsL.P.Member" xlink:href="arcc-20260930.xsd#arcc_DigicertInc.DcertBuyerInc.DCertPreferredHoldingsInc.AndDestinyDigitalHoldingsL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DigicertInc.DcertBuyerInc.DCertPreferredHoldingsInc.AndDestinyDigitalHoldingsL.P.Member" xlink:to="lab_arcc_DigicertInc.DcertBuyerInc.DCertPreferredHoldingsInc.AndDestinyDigitalHoldingsL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount_019fed4d-3e56-7541-bc3d-41452c7576a9_terseLabel_en-US" xlink:label="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum issuance of common stock</link:label>
    <link:label id="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount_label_en-US" xlink:label="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Stock, Capital Shares Reserved For Future Issuance, Amount</link:label>
    <link:label id="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount_documentation_en-US" xlink:label="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Capital Stock, Capital Shares Reserved For Future Issuance, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:href="arcc-20260930.xsd#arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:to="lab_arcc_CapitalStockCapitalSharesReservedForFutureIssuanceAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ZeppelinUSBuyerInc.AndProvidenceEquityPartnersIXCL.P.Member_019fed4d-3dd3-73bf-9757-4bdbb4bd9bcd_terseLabel_en-US" xlink:label="lab_arcc_ZeppelinUSBuyerInc.AndProvidenceEquityPartnersIXCL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Zeppelin US Buyer Inc. and Providence Equity Partners IX-C L.P.</link:label>
    <link:label id="lab_arcc_ZeppelinUSBuyerInc.AndProvidenceEquityPartnersIXCL.P.Member_label_en-US" xlink:label="lab_arcc_ZeppelinUSBuyerInc.AndProvidenceEquityPartnersIXCL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Zeppelin US Buyer Inc. and Providence Equity Partners IX-C L.P. [Member]</link:label>
    <link:label id="lab_arcc_ZeppelinUSBuyerInc.AndProvidenceEquityPartnersIXCL.P.Member_documentation_en-US" xlink:label="lab_arcc_ZeppelinUSBuyerInc.AndProvidenceEquityPartnersIXCL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Zeppelin US Buyer Inc. and Providence Equity Partners IX-C L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ZeppelinUSBuyerInc.AndProvidenceEquityPartnersIXCL.P.Member" xlink:href="arcc-20260930.xsd#arcc_ZeppelinUSBuyerInc.AndProvidenceEquityPartnersIXCL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ZeppelinUSBuyerInc.AndProvidenceEquityPartnersIXCL.P.Member" xlink:to="lab_arcc_ZeppelinUSBuyerInc.AndProvidenceEquityPartnersIXCL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember_019fed4d-3d42-79aa-8de3-8b91e8efad37_terseLabel_en-US" xlink:label="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">American Seafoods Group LLC and American Seafoods Partners LLC</link:label>
    <link:label id="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember_label_en-US" xlink:label="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">American Seafoods Group LLC and American Seafoods Partners LLC [Member]</link:label>
    <link:label id="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember_documentation_en-US" xlink:label="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">American Seafoods Group LLC and American Seafoods Partners LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:href="arcc-20260930.xsd#arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:to="lab_arcc_AmericanSeafoodsGroupLLCAndAmericanSeafoodsPartnersLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019fed4d-3dd3-7fd6-bd1c-60d7fda9f259_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Related Party Transactions, by Related Party [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioDomain_01a17ad2-3371-7756-b452-1596dfffc4d8_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario [Domain]</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioDomain_label_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario [Domain]</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPriceScenarioDomain_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPriceScenarioDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Scenario [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationClosingPriceScenarioDomain" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationClosingPriceScenarioDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationClosingPriceScenarioDomain" xlink:to="lab_arcc_BusinessCombinationClosingPriceScenarioDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AllTradingArrangementsMember_terseLabel_en-US" xlink:label="lab_ecd_AllTradingArrangementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Trading Arrangements</link:label>
    <link:label id="lab_ecd_AllTradingArrangementsMember_label_en-US" xlink:label="lab_ecd_AllTradingArrangementsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Trading Arrangements [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllTradingArrangementsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllTradingArrangementsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AllTradingArrangementsMember" xlink:to="lab_ecd_AllTradingArrangementsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_OtherPerfMeasureAmt_terseLabel_en-US" xlink:label="lab_ecd_OtherPerfMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Performance Measure, Amount</link:label>
    <link:label id="lab_ecd_OtherPerfMeasureAmt_label_en-US" xlink:label="lab_ecd_OtherPerfMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Performance Measure, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OtherPerfMeasureAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_OtherPerfMeasureAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_OtherPerfMeasureAmt" xlink:to="lab_ecd_OtherPerfMeasureAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgMnpiCnsdrdFlag_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgMnpiCnsdrdFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing MNPI Considered</link:label>
    <link:label id="lab_ecd_AwardTmgMnpiCnsdrdFlag_label_en-US" xlink:label="lab_ecd_AwardTmgMnpiCnsdrdFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing MNPI Considered [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMnpiCnsdrdFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgMnpiCnsdrdFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgMnpiCnsdrdFlag" xlink:to="lab_ecd_AwardTmgMnpiCnsdrdFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_019fed4d-3e56-7cec-881a-d7382ff85941_verboseLabel_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_label_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CurrentFiscalYearEndDate" xlink:to="lab_dei_CurrentFiscalYearEndDate" xlink:type="arc" order="1"/>
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    <link:label id="lab_arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PracticeTek Purchaser, LLC, PracticeTek MidCo, LLC and GSV PracticeTek Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember" xlink:to="lab_arcc_PracticeTekPurchaserLLCPracticeTekMidCoLLCAndGSVPracticeTekHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ResearchNowGroupLLCAndDynataLLCAndNewInsightHoldingsInc.Member_019fed4d-3d42-7744-a03a-9c8432a3cbd4_terseLabel_en-US" xlink:label="lab_arcc_ResearchNowGroupLLCAndDynataLLCAndNewInsightHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Research Now Group, LLC and Dynata, LLC and New Insight Holdings, Inc.</link:label>
    <link:label id="lab_arcc_ResearchNowGroupLLCAndDynataLLCAndNewInsightHoldingsInc.Member_label_en-US" xlink:label="lab_arcc_ResearchNowGroupLLCAndDynataLLCAndNewInsightHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Research Now Group, LLC and Dynata, LLC and New Insight Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ResearchNowGroupLLCAndDynataLLCAndNewInsightHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_ResearchNowGroupLLCAndDynataLLCAndNewInsightHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Research Now Group, LLC and Dynata, LLC and New Insight Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ResearchNowGroupLLCAndDynataLLCAndNewInsightHoldingsInc.Member" xlink:href="arcc-20260930.xsd#arcc_ResearchNowGroupLLCAndDynataLLCAndNewInsightHoldingsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ResearchNowGroupLLCAndDynataLLCAndNewInsightHoldingsInc.Member" xlink:to="lab_arcc_ResearchNowGroupLLCAndDynataLLCAndNewInsightHoldingsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ElliottDavisAdvisoryLLCAndElliottDavisAdvisoryHoldCoLLCMember_019fed4d-3e56-74ed-bfec-ed1de702af77_terseLabel_en-US" xlink:label="lab_arcc_ElliottDavisAdvisoryLLCAndElliottDavisAdvisoryHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Elliott Davis Advisory, LLC and Elliott Davis Advisory HoldCo, LLC</link:label>
    <link:label id="lab_arcc_ElliottDavisAdvisoryLLCAndElliottDavisAdvisoryHoldCoLLCMember_label_en-US" xlink:label="lab_arcc_ElliottDavisAdvisoryLLCAndElliottDavisAdvisoryHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Elliott Davis Advisory, LLC and Elliott Davis Advisory HoldCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_ElliottDavisAdvisoryLLCAndElliottDavisAdvisoryHoldCoLLCMember_documentation_en-US" xlink:label="lab_arcc_ElliottDavisAdvisoryLLCAndElliottDavisAdvisoryHoldCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Elliott Davis Advisory, LLC and Elliott Davis Advisory HoldCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ElliottDavisAdvisoryLLCAndElliottDavisAdvisoryHoldCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_ElliottDavisAdvisoryLLCAndElliottDavisAdvisoryHoldCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ElliottDavisAdvisoryLLCAndElliottDavisAdvisoryHoldCoLLCMember" xlink:to="lab_arcc_ElliottDavisAdvisoryLLCAndElliottDavisAdvisoryHoldCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonPeoNeoAvgTotalCompAmt_terseLabel_en-US" xlink:label="lab_ecd_NonPeoNeoAvgTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-PEO NEO Average Total Compensation Amount</link:label>
    <link:label id="lab_ecd_NonPeoNeoAvgTotalCompAmt_label_en-US" xlink:label="lab_ecd_NonPeoNeoAvgTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-PEO NEO Average Total Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonPeoNeoAvgTotalCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonPeoNeoAvgTotalCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonPeoNeoAvgTotalCompAmt" xlink:to="lab_ecd_NonPeoNeoAvgTotalCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MPMidcoHoldingsLLCAndMPTopcoHoldingsLLCMember_019fed4d-3dd3-7e83-8b87-c2b352c0a7ca_terseLabel_en-US" xlink:label="lab_arcc_MPMidcoHoldingsLLCAndMPTopcoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MP Midco Holdings, LLC and MP Topco Holdings, LLC</link:label>
    <link:label id="lab_arcc_MPMidcoHoldingsLLCAndMPTopcoHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_MPMidcoHoldingsLLCAndMPTopcoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MP Midco Holdings, LLC and MP Topco Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_MPMidcoHoldingsLLCAndMPTopcoHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_MPMidcoHoldingsLLCAndMPTopcoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MP Midco Holdings, LLC and MP Topco Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MPMidcoHoldingsLLCAndMPTopcoHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_MPMidcoHoldingsLLCAndMPTopcoHoldingsLLCMember"/>
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    <link:label id="lab_us-gaap_FinancialServicesSectorMember_019fed4d-3d42-768e-9746-5347d80b55c5_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialServicesSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Services</link:label>
    <link:label id="lab_us-gaap_FinancialServicesSectorMember_label_en-US" xlink:label="lab_us-gaap_FinancialServicesSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Services Sector [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialServicesSectorMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialServicesSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialServicesSectorMember" xlink:to="lab_us-gaap_FinancialServicesSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember_019fed4d-3d42-7418-8522-184d97c41c66_terseLabel_en-US" xlink:label="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ferrellgas, L.P. and Ferrelgas Partners, L.P.</link:label>
    <link:label id="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember_label_en-US" xlink:label="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ferrellgas, L.P. and Ferrelgas Partners, L.P. [Member]</link:label>
    <link:label id="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember_documentation_en-US" xlink:label="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ferrellgas, L.P. and Ferrelgas Partners, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:href="arcc-20260930.xsd#arcc_FerrellgasLPAndFerrelgasPartnersLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:to="lab_arcc_FerrellgasLPAndFerrelgasPartnersLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ParisUSHoldcoInc.1001028292OntarioInc.Member_019fed4d-3e55-7e65-9f8c-82257299bdbe_terseLabel_en-US" xlink:label="lab_arcc_ParisUSHoldcoInc.1001028292OntarioInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Paris US Holdco, Inc. &amp; 1001028292 Ontario Inc.</link:label>
    <link:label id="lab_arcc_ParisUSHoldcoInc.1001028292OntarioInc.Member_label_en-US" xlink:label="lab_arcc_ParisUSHoldcoInc.1001028292OntarioInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Paris US Holdco, Inc. &amp; 1001028292 Ontario Inc. [Member]</link:label>
    <link:label id="lab_arcc_ParisUSHoldcoInc.1001028292OntarioInc.Member_documentation_en-US" xlink:label="lab_arcc_ParisUSHoldcoInc.1001028292OntarioInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Paris US Holdco, Inc. &amp; 1001028292 Ontario Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ParisUSHoldcoInc.1001028292OntarioInc.Member" xlink:href="arcc-20260930.xsd#arcc_ParisUSHoldcoInc.1001028292OntarioInc.Member"/>
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    <link:label id="lab_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember_terseLabel_en-US" xlink:label="lab_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember"/>
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    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_019fed4d-3e56-774f-9bcd-b43e58d0097c_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash dividends declared (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_label_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Dividends, Per Share, Declared</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
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    <link:label id="lab_dei_EntityFileNumber_019fed4d-3dd3-76e7-b89f-6751fa4626d1_terseLabel_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Securities Act File Number</link:label>
    <link:label id="lab_dei_EntityFileNumber_label_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities Act File Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
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    <link:label id="lab_arcc_O2026M7DividendsMember_01a034bd-fcd6-7bb8-9286-dffd6d21a9de_terseLabel_en-US" xlink:label="lab_arcc_O2026M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 29, 2026</link:label>
    <link:label id="lab_arcc_O2026M7DividendsMember_label_en-US" xlink:label="lab_arcc_O2026M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">O 2026 M7 Dividends [Member]</link:label>
    <link:label id="lab_arcc_O2026M7DividendsMember_documentation_en-US" xlink:label="lab_arcc_O2026M7DividendsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">O 2026 M7 Dividends</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_O2026M7DividendsMember" xlink:href="arcc-20260930.xsd#arcc_O2026M7DividendsMember"/>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_RecoveryOfErrCompDisclosureLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="lab_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember_019fed4d-3dd3-771b-88e8-981ff7ec49d4_terseLabel_en-US" xlink:label="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Triwizard Holdings, Inc. and Triwizard Parent, LP</link:label>
    <link:label id="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember_label_en-US" xlink:label="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Triwizard Holdings, Inc. and Triwizard Parent, LP [Member]</link:label>
    <link:label id="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember_documentation_en-US" xlink:label="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Triwizard Holdings, Inc. and Triwizard Parent, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:href="arcc-20260930.xsd#arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:to="lab_arcc_TriwizardHoldingsInc.AndTriwizardParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SpaceshipPurchaserInc.Member_019fed4d-3e56-73b5-be24-13fc7a82d1b6_terseLabel_en-US" xlink:label="lab_arcc_SpaceshipPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Spaceship Purchaser, Inc.</link:label>
    <link:label id="lab_arcc_SpaceshipPurchaserInc.Member_label_en-US" xlink:label="lab_arcc_SpaceshipPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Spaceship Purchaser, Inc. [Member]</link:label>
    <link:label id="lab_arcc_SpaceshipPurchaserInc.Member_documentation_en-US" xlink:label="lab_arcc_SpaceshipPurchaserInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Spaceship Purchaser, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SpaceshipPurchaserInc.Member" xlink:href="arcc-20260930.xsd#arcc_SpaceshipPurchaserInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SpaceshipPurchaserInc.Member" xlink:to="lab_arcc_SpaceshipPurchaserInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_MeasureAxis_terseLabel_en-US" xlink:label="lab_ecd_MeasureAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measure:</link:label>
    <link:label id="lab_ecd_MeasureAxis_label_en-US" xlink:label="lab_ecd_MeasureAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measure [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MeasureAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_MeasureAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_MeasureAxis" xlink:to="lab_ecd_MeasureAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AmortizationOfDebtDiscountPremium_019fed4d-3d42-737c-afab-73d92409aa28_verboseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfDebtDiscountPremium" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net amortization of discount/premium on notes payable</link:label>
    <link:label id="lab_us-gaap_AmortizationOfDebtDiscountPremium_019fed4d-3d42-7773-8fe9-4f9f335ca69b_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfDebtDiscountPremium" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net amortization of original issue discount/premium</link:label>
    <link:label id="lab_us-gaap_AmortizationOfDebtDiscountPremium_label_en-US" xlink:label="lab_us-gaap_AmortizationOfDebtDiscountPremium" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Debt Discount (Premium)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfDebtDiscountPremium" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfDebtDiscountPremium"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfDebtDiscountPremium" xlink:to="lab_us-gaap_AmortizationOfDebtDiscountPremium" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_019fed4d-3dd3-7276-8471-1bd65099524c_terseLabel_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_label_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementEquityComponentsAxis" xlink:to="lab_us-gaap_StatementEquityComponentsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_019fed4d-3e56-7e5b-958f-0c00db143291_totalLabel_en-US" xlink:label="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net realized gains (losses)</link:label>
    <link:label id="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_019fed4d-3e56-7bb6-9b49-7a0f7645629e_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net realized gains on investments, foreign currency and other transactions</link:label>
    <link:label id="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_019fed4d-3e56-75e8-b4e0-e74e1ade464d_verboseLabel_en-US" xlink:label="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net realized gains (losses) on investments, foreign currency and other transactions</link:label>
    <link:label id="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax_label_en-US" xlink:label="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Realized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, after Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:to="lab_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingAfterTax" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_019fed4d-3e56-7c6a-9aee-923b21ab2630_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Taxes, including excise taxes, paid during the period</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Paid, after Refund Received</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesPaidNet" xlink:to="lab_us-gaap_IncomeTaxesPaidNet" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_July2038ClassBRCLONotesMember_01a07feb-eaae-7faa-ba2f-7906a2f4a0c4_terseLabel_en-US" xlink:label="lab_arcc_July2038ClassBRCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 2038 Class B-R CLO Notes</link:label>
    <link:label id="lab_arcc_July2038ClassBRCLONotesMember_label_en-US" xlink:label="lab_arcc_July2038ClassBRCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">July 2038 Class B-R CLO Notes [Member]</link:label>
    <link:label id="lab_arcc_July2038ClassBRCLONotesMember_documentation_en-US" xlink:label="lab_arcc_July2038ClassBRCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">July 2038 Class B-R CLO Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_July2038ClassBRCLONotesMember" xlink:href="arcc-20260930.xsd#arcc_July2038ClassBRCLONotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_July2038ClassBRCLONotesMember" xlink:to="lab_arcc_July2038ClassBRCLONotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfForeignExchangeContractsStatementOfFinancialPositionTableTextBlock_019fed4d-3d42-7de3-847d-4fd211af8946_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfForeignExchangeContractsStatementOfFinancialPositionTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Derivative Instruments</link:label>
    <link:label id="lab_us-gaap_ScheduleOfForeignExchangeContractsStatementOfFinancialPositionTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfForeignExchangeContractsStatementOfFinancialPositionTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Foreign Exchange Contracts, Statement of Financial Position [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfForeignExchangeContractsStatementOfFinancialPositionTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfForeignExchangeContractsStatementOfFinancialPositionTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfForeignExchangeContractsStatementOfFinancialPositionTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfForeignExchangeContractsStatementOfFinancialPositionTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HSPurchaserLLCAndHelpSystemsHoldingsInc.Member_01a15d77-a6f8-7595-8f5e-8e6e8580b00d_terseLabel_en-US" xlink:label="lab_arcc_HSPurchaserLLCAndHelpSystemsHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HS Purchaser, LLC, and Help/Systems Holdings, Inc.</link:label>
    <link:label id="lab_arcc_HSPurchaserLLCAndHelpSystemsHoldingsInc.Member_label_en-US" xlink:label="lab_arcc_HSPurchaserLLCAndHelpSystemsHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HS Purchaser, LLC, and Help/Systems Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_HSPurchaserLLCAndHelpSystemsHoldingsInc.Member_documentation_en-US" xlink:label="lab_arcc_HSPurchaserLLCAndHelpSystemsHoldingsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">HS Purchaser, LLC, and Help/Systems Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HSPurchaserLLCAndHelpSystemsHoldingsInc.Member" xlink:href="arcc-20260930.xsd#arcc_HSPurchaserLLCAndHelpSystemsHoldingsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HSPurchaserLLCAndHelpSystemsHoldingsInc.Member" xlink:to="lab_arcc_HSPurchaserLLCAndHelpSystemsHoldingsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member_019fed4d-3e56-7596-bcec-c9733ddde3f5_terseLabel_en-US" xlink:label="lab_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Avalign Holdings, Inc. and Avalign Technologies, Inc.</link:label>
    <link:label id="lab_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member_label_en-US" xlink:label="lab_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Avalign Holdings, Inc. and Avalign Technologies, Inc. [Member]</link:label>
    <link:label id="lab_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member_documentation_en-US" xlink:label="lab_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Avalign Holdings, Inc. and Avalign Technologies, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member" xlink:href="arcc-20260930.xsd#arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member" xlink:to="lab_arcc_AvalignHoldingsInc.AndAvalignTechnologiesInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityInteractiveDataCurrent_019fed4d-3e56-7045-8cf5-0c89b87ce339_terseLabel_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Interactive Data Current</link:label>
    <link:label id="lab_dei_EntityInteractiveDataCurrent_label_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Interactive Data Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityInteractiveDataCurrent" xlink:to="lab_dei_EntityInteractiveDataCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_VariableRateAxis_019fed4d-3dd3-70fb-9f82-28d5c607808e_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:label id="lab_us-gaap_VariableRateAxis_label_en-US" xlink:label="lab_us-gaap_VariableRateAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableRateAxis" xlink:to="lab_us-gaap_VariableRateAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019fed4d-3dd3-7d79-99d9-daa09476dee0_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less: Net income (loss) attributable to non-controlling interests in Consolidated IHAM Vehicles</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:to="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FloridaFoodProductsLLCMember_019fed4d-3d42-75f2-867b-1337f271c245_terseLabel_en-US" xlink:label="lab_arcc_FloridaFoodProductsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Florida Food Products, LLC</link:label>
    <link:label id="lab_arcc_FloridaFoodProductsLLCMember_label_en-US" xlink:label="lab_arcc_FloridaFoodProductsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Florida Food Products, LLC [Member]</link:label>
    <link:label id="lab_arcc_FloridaFoodProductsLLCMember_documentation_en-US" xlink:label="lab_arcc_FloridaFoodProductsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Florida Food Products, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FloridaFoodProductsLLCMember" xlink:href="arcc-20260930.xsd#arcc_FloridaFoodProductsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FloridaFoodProductsLLCMember" xlink:to="lab_arcc_FloridaFoodProductsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ID.meLLCAndID.meInc.Member_019fed4d-3d42-72c3-8124-9e6fadae5d92_terseLabel_en-US" xlink:label="lab_arcc_ID.meLLCAndID.meInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ID.me, LLC and ID.me, Inc.</link:label>
    <link:label id="lab_arcc_ID.meLLCAndID.meInc.Member_label_en-US" xlink:label="lab_arcc_ID.meLLCAndID.meInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ID.me, LLC and ID.me, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ID.meLLCAndID.meInc.Member_documentation_en-US" xlink:label="lab_arcc_ID.meLLCAndID.meInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ID.me, LLC and ID.me, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ID.meLLCAndID.meInc.Member" xlink:href="arcc-20260930.xsd#arcc_ID.meLLCAndID.meInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ID.meLLCAndID.meInc.Member" xlink:to="lab_arcc_ID.meLLCAndID.meInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntitySmallBusiness_019fed4d-3dd3-71e1-a2b3-cdb4d35db1aa_terseLabel_en-US" xlink:label="lab_dei_EntitySmallBusiness" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Small Business</link:label>
    <link:label id="lab_dei_EntitySmallBusiness_label_en-US" xlink:label="lab_dei_EntitySmallBusiness" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Small Business</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntitySmallBusiness" xlink:to="lab_dei_EntitySmallBusiness" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_019fed4d-3e56-7956-9661-1372975ba99a_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable" xlink:to="lab_us-gaap_FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SelectQuoteInc.AndSQABSIssuerLLCMember_019fed4d-3dd3-77ec-a734-ebca18eec75f_terseLabel_en-US" xlink:label="lab_arcc_SelectQuoteInc.AndSQABSIssuerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SelectQuote, Inc. and SQ ABS Issuer, LLC</link:label>
    <link:label id="lab_arcc_SelectQuoteInc.AndSQABSIssuerLLCMember_label_en-US" xlink:label="lab_arcc_SelectQuoteInc.AndSQABSIssuerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SelectQuote, Inc. and SQ ABS Issuer, LLC [Member]</link:label>
    <link:label id="lab_arcc_SelectQuoteInc.AndSQABSIssuerLLCMember_documentation_en-US" xlink:label="lab_arcc_SelectQuoteInc.AndSQABSIssuerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SelectQuote, Inc. and SQ ABS Issuer, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SelectQuoteInc.AndSQABSIssuerLLCMember" xlink:href="arcc-20260930.xsd#arcc_SelectQuoteInc.AndSQABSIssuerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SelectQuoteInc.AndSQABSIssuerLLCMember" xlink:to="lab_arcc_SelectQuoteInc.AndSQABSIssuerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_MnpiDiscTimedForCompValFlag_terseLabel_en-US" xlink:label="lab_ecd_MnpiDiscTimedForCompValFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MNPI Disclosure Timed for Compensation Value</link:label>
    <link:label id="lab_ecd_MnpiDiscTimedForCompValFlag_label_en-US" xlink:label="lab_ecd_MnpiDiscTimedForCompValFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MNPI Disclosure Timed for Compensation Value [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MnpiDiscTimedForCompValFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_MnpiDiscTimedForCompValFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_MnpiDiscTimedForCompValFlag" xlink:to="lab_ecd_MnpiDiscTimedForCompValFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_019fed4d-3e56-75f7-a73a-5a91eac96eee_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sales and repayments of investments and other transactions</link:label>
    <link:label id="lab_us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_label_en-US" xlink:label="lab_us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Disposition of Investment, Operating Activity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" xlink:to="lab_us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WorkWaveIntermediateIILLCMember_019fed4d-3e56-79bc-86fa-24ecb1f5713d_terseLabel_en-US" xlink:label="lab_arcc_WorkWaveIntermediateIILLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">WorkWave Intermediate II, LLC</link:label>
    <link:label id="lab_arcc_WorkWaveIntermediateIILLCMember_label_en-US" xlink:label="lab_arcc_WorkWaveIntermediateIILLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">WorkWave Intermediate II, LLC [Member]</link:label>
    <link:label id="lab_arcc_WorkWaveIntermediateIILLCMember_documentation_en-US" xlink:label="lab_arcc_WorkWaveIntermediateIILLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">WorkWave Intermediate II, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WorkWaveIntermediateIILLCMember" xlink:href="arcc-20260930.xsd#arcc_WorkWaveIntermediateIILLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WorkWaveIntermediateIILLCMember" xlink:to="lab_arcc_WorkWaveIntermediateIILLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_019fed4d-3e56-73f4-b1d7-2c3653a7c4e1_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FINANCING ACTIVITIES:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentType_019fed4d-3d42-7827-8917-d33a1b217900_terseLabel_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_label_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType" xlink:to="lab_dei_DocumentType" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember_019fed4d-3dd3-731b-8096-29e706bf0b96_terseLabel_en-US" xlink:label="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LJP Purchaser, Inc. and LJP Topco, LP</link:label>
    <link:label id="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember_label_en-US" xlink:label="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">LJP Purchaser, Inc. and LJP Topco, LP [Member]</link:label>
    <link:label id="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember_documentation_en-US" xlink:label="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">LJP Purchaser, Inc. and LJP Topco, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:href="arcc-20260930.xsd#arcc_LJPPurchaserIncAndLJPTopcoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:to="lab_arcc_LJPPurchaserIncAndLJPTopcoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember_019fed4d-3dd3-7c47-8011-477ce2b9c016_terseLabel_en-US" xlink:label="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OTG Concessions Management, LLC and Octa Parent Holdings, LLC</link:label>
    <link:label id="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OTG Concessions Management, LLC and Octa Parent Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OTG Concessions Management, LLC and Octa Parent Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember" xlink:to="lab_arcc_OTGConcessionsManagementLLCAndOctaParentHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_019fed4d-3e56-7205-b101-d2eda34ec8eb_terseLabel_en-US" xlink:label="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Realized loss on extinguishment of debt</link:label>
    <link:label id="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_019fed4d-3e56-7bfb-96d6-d34816e4f6d7_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Realized loss on extinguishment of debt</link:label>
    <link:label id="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_019fed4d-3e56-7a1c-a6f4-1ebc1410daa1_netLabel_en-US" xlink:label="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US">Net realized gains (losses) on extinguishment of debt</link:label>
    <link:label id="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_label_en-US" xlink:label="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Extinguishment of Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:to="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member_019fed4d-3e56-7815-8e97-e44e79e33d83_terseLabel_en-US" xlink:label="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premier Specialties, Inc. and RMCF V CIV XLIV, L.P.</link:label>
    <link:label id="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member_label_en-US" xlink:label="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premier Specialties, Inc. and RMCF V CIV XLIV, L.P. [Member]</link:label>
    <link:label id="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member_documentation_en-US" xlink:label="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Premier Specialties, Inc. and RMCF V CIV XLIV, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:href="arcc-20260930.xsd#arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:to="lab_arcc_PremierSpecialtiesInc.AndRMCFVCIVXLIVL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PrecisionConceptsParentInc.PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember_019fed4d-3e56-7032-a975-12275d33903b_terseLabel_en-US" xlink:label="lab_arcc_PrecisionConceptsParentInc.PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Precision Concepts International LLC and Precision Concepts Canada Corporation</link:label>
    <link:label id="lab_arcc_PrecisionConceptsParentInc.PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember_label_en-US" xlink:label="lab_arcc_PrecisionConceptsParentInc.PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Precision Concepts Parent Inc., Precision Concepts International LLC, and Precision Concepts Canada Corporation [Member]</link:label>
    <link:label id="lab_arcc_PrecisionConceptsParentInc.PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember_documentation_en-US" xlink:label="lab_arcc_PrecisionConceptsParentInc.PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Precision Concepts Parent Inc., Precision Concepts International LLC, and Precision Concepts Canada Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PrecisionConceptsParentInc.PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:href="arcc-20260930.xsd#arcc_PrecisionConceptsParentInc.PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PrecisionConceptsParentInc.PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:to="lab_arcc_PrecisionConceptsParentInc.PrecisionConceptsInternationalLLCAndPrecisionConceptsCanadaCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetAssetValuePerShare_019fed4d-3e56-7faa-8ffb-1e43258a64ae_terseLabel_en-US" xlink:label="lab_us-gaap_NetAssetValuePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NET ASSET VALUE PER SHARE (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_NetAssetValuePerShare_019fed4d-3e56-72da-85ca-b1215e8d3f0f_periodStartLabel_en-US" xlink:label="lab_us-gaap_NetAssetValuePerShare" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Net asset value, beginning of period (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_NetAssetValuePerShare_019fed4d-3e56-7177-a712-28045ab8c21d_periodEndLabel_en-US" xlink:label="lab_us-gaap_NetAssetValuePerShare" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Net asset value, end of period (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_NetAssetValuePerShare_label_en-US" xlink:label="lab_us-gaap_NetAssetValuePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Asset Value Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetAssetValuePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetAssetValuePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetAssetValuePerShare" xlink:to="lab_us-gaap_NetAssetValuePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaidInKindInterest_019fed4d-3dd3-7391-b78e-85791d9e5816_terseLabel_en-US" xlink:label="lab_us-gaap_PaidInKindInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collections of PIK interest</link:label>
    <link:label id="lab_us-gaap_PaidInKindInterest_label_en-US" xlink:label="lab_us-gaap_PaidInKindInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Paid-in-Kind Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaidInKindInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaidInKindInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaidInKindInterest" xlink:to="lab_us-gaap_PaidInKindInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_019fed4d-3dd3-7ce2-be29-71f7fbdd52f4_terseLabel_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SIGNIFICANT ACCOUNTING POLICIES</link:label>
    <link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_label_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Significant Accounting Policies [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SignificantAccountingPoliciesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:to="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentsAtFairValueMember_019fed4d-3dd3-703f-8002-b94ad487f32e_terseLabel_en-US" xlink:label="lab_arcc_InvestmentsAtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments, At Fair Value</link:label>
    <link:label id="lab_arcc_InvestmentsAtFairValueMember_label_en-US" xlink:label="lab_arcc_InvestmentsAtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments, At Fair Value [Member]</link:label>
    <link:label id="lab_arcc_InvestmentsAtFairValueMember_documentation_en-US" xlink:label="lab_arcc_InvestmentsAtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investments, At Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentsAtFairValueMember" xlink:href="arcc-20260930.xsd#arcc_InvestmentsAtFairValueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentsAtFairValueMember" xlink:to="lab_arcc_InvestmentsAtFairValueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentInterestRatePaidInKind_019fed4d-3dd3-70ec-816d-3246f2500e12_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentInterestRatePaidInKind" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Coupon, PIK</link:label>
    <link:label id="lab_us-gaap_InvestmentInterestRatePaidInKind_label_en-US" xlink:label="lab_us-gaap_InvestmentInterestRatePaidInKind" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Interest Rate, Paid in Kind</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentInterestRatePaidInKind" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentInterestRatePaidInKind"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentInterestRatePaidInKind" xlink:to="lab_us-gaap_InvestmentInterestRatePaidInKind" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember_019fed4d-3dd3-721e-a218-422325d479b6_terseLabel_en-US" xlink:label="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proprietary Portfolio Management Software Agreement</link:label>
    <link:label id="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember_label_en-US" xlink:label="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proprietary Portfolio Management Software Agreement [Member]</link:label>
    <link:label id="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember_documentation_en-US" xlink:label="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Proprietary Portfolio Management Software Agreement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:href="arcc-20260930.xsd#arcc_ProprietaryPortfolioManagementSoftwareAgreementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:to="lab_arcc_ProprietaryPortfolioManagementSoftwareAgreementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FlintOpCoLLCMember_019fed4d-3e56-7148-9653-3da6729a3603_terseLabel_en-US" xlink:label="lab_arcc_FlintOpCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Flint OpCo, LLC</link:label>
    <link:label id="lab_arcc_FlintOpCoLLCMember_label_en-US" xlink:label="lab_arcc_FlintOpCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Flint OpCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_FlintOpCoLLCMember_documentation_en-US" xlink:label="lab_arcc_FlintOpCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Flint OpCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FlintOpCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_FlintOpCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FlintOpCoLLCMember" xlink:to="lab_arcc_FlintOpCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OpenSwapContractIdentifierAxis_019fed4d-3e56-74ea-ba7a-9d55cb9f8708_terseLabel_en-US" xlink:label="lab_us-gaap_OpenSwapContractIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Open Swap Contract, Identifier [Axis]</link:label>
    <link:label id="lab_us-gaap_OpenSwapContractIdentifierAxis_label_en-US" xlink:label="lab_us-gaap_OpenSwapContractIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Open Swap Contract, Identifier [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OpenSwapContractIdentifierAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OpenSwapContractIdentifierAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OpenSwapContractIdentifierAxis" xlink:to="lab_us-gaap_OpenSwapContractIdentifierAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventLineItems_019fed4d-3d42-7db8-b5c5-9850be2181f0_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Line Items]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventLineItems_label_en-US" xlink:label="lab_us-gaap_SubsequentEventLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventLineItems" xlink:to="lab_us-gaap_SubsequentEventLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementOfStockholdersEquityAbstract_label_en-US" xlink:label="lab_us-gaap_StatementOfStockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Stockholders' Equity [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfStockholdersEquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfStockholdersEquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="lab_us-gaap_StatementOfStockholdersEquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_019fed4d-3dd3-7ea8-8094-2c20df1945cc_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Borrowings on debt</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Long-Term Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LocalPhoneNumber_019fed4d-3e56-785e-83ed-b2a16ac38e9e_terseLabel_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Local Phone Number</link:label>
    <link:label id="lab_dei_LocalPhoneNumber_label_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Local Phone Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber" xlink:to="lab_dei_LocalPhoneNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_January2031NotesMember_019fed4d-3d42-71de-836f-6acb9469472b_terseLabel_en-US" xlink:label="lab_arcc_January2031NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">January 2031 Notes</link:label>
    <link:label id="lab_arcc_January2031NotesMember_019fed4d-3d42-78d3-a433-24ca0cbb5fe0_verboseLabel_en-US" xlink:label="lab_arcc_January2031NotesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">January 2031 Notes (principal amount outstanding of $650)</link:label>
    <link:label id="lab_arcc_January2031NotesMember_label_en-US" xlink:label="lab_arcc_January2031NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">January 2031 Notes [Member]</link:label>
    <link:label id="lab_arcc_January2031NotesMember_documentation_en-US" xlink:label="lab_arcc_January2031NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">January 2031 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_January2031NotesMember" xlink:href="arcc-20260930.xsd#arcc_January2031NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_January2031NotesMember" xlink:to="lab_arcc_January2031NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SunrunLunaHoldco2021LLCMember_019fed4d-3dd3-7156-b7fc-a6d6ac66ce07_terseLabel_en-US" xlink:label="lab_arcc_SunrunLunaHoldco2021LLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sunrun Luna Holdco 2021, LLC</link:label>
    <link:label id="lab_arcc_SunrunLunaHoldco2021LLCMember_label_en-US" xlink:label="lab_arcc_SunrunLunaHoldco2021LLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sunrun Luna Holdco 2021, LLC [Member]</link:label>
    <link:label id="lab_arcc_SunrunLunaHoldco2021LLCMember_documentation_en-US" xlink:label="lab_arcc_SunrunLunaHoldco2021LLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sunrun Luna Holdco 2021, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SunrunLunaHoldco2021LLCMember" xlink:href="arcc-20260930.xsd#arcc_SunrunLunaHoldco2021LLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SunrunLunaHoldco2021LLCMember" xlink:to="lab_arcc_SunrunLunaHoldco2021LLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InterestAndDividendIncomeSecuritiesIncludingRealizedGainLossOnInvestmentsOperating_019fed4d-3dd3-7897-b657-1be00cba752e_terseLabel_en-US" xlink:label="lab_arcc_InterestAndDividendIncomeSecuritiesIncludingRealizedGainLossOnInvestmentsOperating" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other investment-related income</link:label>
    <link:label id="lab_arcc_InterestAndDividendIncomeSecuritiesIncludingRealizedGainLossOnInvestmentsOperating_label_en-US" xlink:label="lab_arcc_InterestAndDividendIncomeSecuritiesIncludingRealizedGainLossOnInvestmentsOperating" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest And Dividend Income, Securities, Including Realized Gain (Loss) On Investments, Operating</link:label>
    <link:label id="lab_arcc_InterestAndDividendIncomeSecuritiesIncludingRealizedGainLossOnInvestmentsOperating_documentation_en-US" xlink:label="lab_arcc_InterestAndDividendIncomeSecuritiesIncludingRealizedGainLossOnInvestmentsOperating" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest And Dividend Income, Securities, Including Realized Gain (Loss) On Investments, Operating</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestAndDividendIncomeSecuritiesIncludingRealizedGainLossOnInvestmentsOperating" xlink:href="arcc-20260930.xsd#arcc_InterestAndDividendIncomeSecuritiesIncludingRealizedGainLossOnInvestmentsOperating"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InterestAndDividendIncomeSecuritiesIncludingRealizedGainLossOnInvestmentsOperating" xlink:to="lab_arcc_InterestAndDividendIncomeSecuritiesIncludingRealizedGainLossOnInvestmentsOperating" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TransportationMember_019fed4d-3d42-706a-b309-b9994cc8eaed_terseLabel_en-US" xlink:label="lab_arcc_TransportationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transportation</link:label>
    <link:label id="lab_arcc_TransportationMember_label_en-US" xlink:label="lab_arcc_TransportationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transportation [Member]</link:label>
    <link:label id="lab_arcc_TransportationMember_documentation_en-US" xlink:label="lab_arcc_TransportationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Transportation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TransportationMember" xlink:href="arcc-20260930.xsd#arcc_TransportationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TransportationMember" xlink:to="lab_arcc_TransportationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyPerShareDataAbstract_019fed4d-3e56-7a5a-94e7-e29f81492742_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyPerShareDataAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Per Share Data:</link:label>
    <link:label id="lab_arcc_InvestmentCompanyPerShareDataAbstract_label_en-US" xlink:label="lab_arcc_InvestmentCompanyPerShareDataAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Per Share Data [Abstract]</link:label>
    <link:label id="lab_arcc_InvestmentCompanyPerShareDataAbstract_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyPerShareDataAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Per Share Data</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyPerShareDataAbstract" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyPerShareDataAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyPerShareDataAbstract" xlink:to="lab_arcc_InvestmentCompanyPerShareDataAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_019fed4d-3dd3-7096-94c6-d185bb12d8af_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitments and contingencies (Note&#160;7)</link:label>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingencies" xlink:to="lab_us-gaap_CommitmentsAndContingencies" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_019fed4d-3dd3-7580-81ab-a768253ed12e_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PFLMMALLCPFLGroupLLCAndMVPNewCoLLCMember_01a1585a-b477-7e44-8b06-cf2d9f28bccd_terseLabel_en-US" xlink:label="lab_arcc_PFLMMALLCPFLGroupLLCAndMVPNewCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PFL MMA, LLC, PFL Group, LLC, and MVP NewCo, LLC</link:label>
    <link:label id="lab_arcc_PFLMMALLCPFLGroupLLCAndMVPNewCoLLCMember_label_en-US" xlink:label="lab_arcc_PFLMMALLCPFLGroupLLCAndMVPNewCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PFL MMA, LLC, PFL Group, LLC, and MVP NewCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_PFLMMALLCPFLGroupLLCAndMVPNewCoLLCMember_documentation_en-US" xlink:label="lab_arcc_PFLMMALLCPFLGroupLLCAndMVPNewCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PFL MMA, LLC, PFL Group, LLC, and MVP NewCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PFLMMALLCPFLGroupLLCAndMVPNewCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_PFLMMALLCPFLGroupLLCAndMVPNewCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PFLMMALLCPFLGroupLLCAndMVPNewCoLLCMember" xlink:to="lab_arcc_PFLMMALLCPFLGroupLLCAndMVPNewCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ChangedPeerGroupFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_ChangedPeerGroupFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changed Peer Group, Footnote</link:label>
    <link:label id="lab_ecd_ChangedPeerGroupFnTextBlock_label_en-US" xlink:label="lab_ecd_ChangedPeerGroupFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Changed Peer Group, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ChangedPeerGroupFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ChangedPeerGroupFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ChangedPeerGroupFnTextBlock" xlink:to="lab_ecd_ChangedPeerGroupFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MustangProspectsHoldcoLLCMustangProspectsPurchaserLLCAndSenskeAcquisitionInc.Member_019fed4d-3d42-7f28-9c98-b817d4f9ae64_terseLabel_en-US" xlink:label="lab_arcc_MustangProspectsHoldcoLLCMustangProspectsPurchaserLLCAndSenskeAcquisitionInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mustang Prospects Holdco, LLC, Mustang Prospects Purchaser, LLC and Senske Acquisition, Inc.</link:label>
    <link:label id="lab_arcc_MustangProspectsHoldcoLLCMustangProspectsPurchaserLLCAndSenskeAcquisitionInc.Member_label_en-US" xlink:label="lab_arcc_MustangProspectsHoldcoLLCMustangProspectsPurchaserLLCAndSenskeAcquisitionInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mustang Prospects Holdco, LLC, Mustang Prospects Purchaser, LLC and Senske Acquisition, Inc. [Member]</link:label>
    <link:label id="lab_arcc_MustangProspectsHoldcoLLCMustangProspectsPurchaserLLCAndSenskeAcquisitionInc.Member_documentation_en-US" xlink:label="lab_arcc_MustangProspectsHoldcoLLCMustangProspectsPurchaserLLCAndSenskeAcquisitionInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mustang Prospects Holdco, LLC, Mustang Prospects Purchaser, LLC and Senske Acquisition, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MustangProspectsHoldcoLLCMustangProspectsPurchaserLLCAndSenskeAcquisitionInc.Member" xlink:href="arcc-20260930.xsd#arcc_MustangProspectsHoldcoLLCMustangProspectsPurchaserLLCAndSenskeAcquisitionInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MustangProspectsHoldcoLLCMustangProspectsPurchaserLLCAndSenskeAcquisitionInc.Member" xlink:to="lab_arcc_MustangProspectsHoldcoLLCMustangProspectsPurchaserLLCAndSenskeAcquisitionInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BeneconMidcoIILLCAndBeneconHoldingsLLCMember_019fed4d-3dd3-744f-bb0a-4f9600a1b6c7_terseLabel_en-US" xlink:label="lab_arcc_BeneconMidcoIILLCAndBeneconHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Benecon Midco II LLC and Benecon Holdings, LLC</link:label>
    <link:label id="lab_arcc_BeneconMidcoIILLCAndBeneconHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_BeneconMidcoIILLCAndBeneconHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Benecon Midco II LLC and Benecon Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_BeneconMidcoIILLCAndBeneconHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_BeneconMidcoIILLCAndBeneconHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Benecon Midco II LLC and Benecon Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BeneconMidcoIILLCAndBeneconHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_BeneconMidcoIILLCAndBeneconHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BeneconMidcoIILLCAndBeneconHoldingsLLCMember" xlink:to="lab_arcc_BeneconMidcoIILLCAndBeneconHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyDividendDistribution_019fed4d-3e56-76a1-af97-57a8ba0f2a65_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDividendDistribution" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Dividends declared and payable</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyDividendDistribution_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDividendDistribution" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Dividend Distribution</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyDividendDistribution" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyDividendDistribution"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyDividendDistribution" xlink:to="lab_us-gaap_InvestmentCompanyDividendDistribution" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ExecutiveCategoryAxis_terseLabel_en-US" xlink:label="lab_ecd_ExecutiveCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Executive Category:</link:label>
    <link:label id="lab_ecd_ExecutiveCategoryAxis_label_en-US" xlink:label="lab_ecd_ExecutiveCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Executive Category [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ExecutiveCategoryAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ExecutiveCategoryAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ExecutiveCategoryAxis" xlink:to="lab_ecd_ExecutiveCategoryAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember_019fed4d-3d42-7fc7-829d-51922d41fdf5_terseLabel_en-US" xlink:label="lab_arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EP Purchaser, LLC and TPG VIII EP Co-Invest II, L.P.</link:label>
    <link:label id="lab_arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember_label_en-US" xlink:label="lab_arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EP Purchaser, LLC and TPG VIII EP Co-Invest II, L.P. [Member]</link:label>
    <link:label id="lab_arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember_documentation_en-US" xlink:label="lab_arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EP Purchaser, LLC and TPG VIII EP Co-Invest II, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember" xlink:href="arcc-20260930.xsd#arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember" xlink:to="lab_arcc_EPPurchaserLLCAndTPGVIIIEPCoInvestIILPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CreateMusicHoldingsLLCMember_019fed4d-3d42-75ba-8d2a-90237921a89b_terseLabel_en-US" xlink:label="lab_arcc_CreateMusicHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Create Music Holdings, LLC</link:label>
    <link:label id="lab_arcc_CreateMusicHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_CreateMusicHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Create Music Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_CreateMusicHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_CreateMusicHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Create Music Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CreateMusicHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_CreateMusicHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CreateMusicHoldingsLLCMember" xlink:to="lab_arcc_CreateMusicHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember_019fed4d-3dd3-732b-8b29-c8d19cbf7ee7_terseLabel_en-US" xlink:label="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC</link:label>
    <link:label id="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">CVP Holdco, Inc. and OMERS Wildcats Investment Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:to="lab_arcc_CVPHoldcoIncAndOMERSWildcatsInvestmentHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_CounterpartyNameAxis_01a17add-b6d8-7eba-aa8f-826f946f4a91_terseLabel_en-US" xlink:label="lab_srt_CounterpartyNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Name [Axis]</link:label>
    <link:label id="lab_srt_CounterpartyNameAxis_label_en-US" xlink:label="lab_srt_CounterpartyNameAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_CounterpartyNameAxis" xlink:to="lab_srt_CounterpartyNameAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_UnderwritingAndAdvisoryFeesReceivedMember_019fed4d-3d42-7d04-bf2d-c7f817b9a67e_terseLabel_en-US" xlink:label="lab_arcc_UnderwritingAndAdvisoryFeesReceivedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Underwriting And Advisory Fees Received</link:label>
    <link:label id="lab_arcc_UnderwritingAndAdvisoryFeesReceivedMember_label_en-US" xlink:label="lab_arcc_UnderwritingAndAdvisoryFeesReceivedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Underwriting And Advisory Fees Received [Member]</link:label>
    <link:label id="lab_arcc_UnderwritingAndAdvisoryFeesReceivedMember_documentation_en-US" xlink:label="lab_arcc_UnderwritingAndAdvisoryFeesReceivedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Underwriting And Advisory Fees Received</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_UnderwritingAndAdvisoryFeesReceivedMember" xlink:href="arcc-20260930.xsd#arcc_UnderwritingAndAdvisoryFeesReceivedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_UnderwritingAndAdvisoryFeesReceivedMember" xlink:to="lab_arcc_UnderwritingAndAdvisoryFeesReceivedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherCommitmentsTable_019fed4d-3d42-7f7f-a774-b0d139f7d813_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Commitments [Table]</link:label>
    <link:label id="lab_us-gaap_OtherCommitmentsTable_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Commitments [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherCommitmentsTable" xlink:to="lab_us-gaap_OtherCommitmentsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ReagentChemicalResearchLLCMember_019fed4d-3e56-75ec-b1b1-a5f6790c420f_terseLabel_en-US" xlink:label="lab_arcc_ReagentChemicalResearchLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reagent Chemical &amp; Research, LLC</link:label>
    <link:label id="lab_arcc_ReagentChemicalResearchLLCMember_label_en-US" xlink:label="lab_arcc_ReagentChemicalResearchLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reagent Chemical &amp; Research, LLC [Member]</link:label>
    <link:label id="lab_arcc_ReagentChemicalResearchLLCMember_documentation_en-US" xlink:label="lab_arcc_ReagentChemicalResearchLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reagent Chemical &amp; Research, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ReagentChemicalResearchLLCMember" xlink:href="arcc-20260930.xsd#arcc_ReagentChemicalResearchLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ReagentChemicalResearchLLCMember" xlink:to="lab_arcc_ReagentChemicalResearchLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BorrowerR365HoldingsLLCMember_019fed4d-3e56-776e-bc9c-e3229cdb4d66_terseLabel_en-US" xlink:label="lab_arcc_BorrowerR365HoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Borrower R365 Holdings LLC</link:label>
    <link:label id="lab_arcc_BorrowerR365HoldingsLLCMember_label_en-US" xlink:label="lab_arcc_BorrowerR365HoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Borrower R365 Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_BorrowerR365HoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_BorrowerR365HoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Borrower R365 Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BorrowerR365HoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_BorrowerR365HoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BorrowerR365HoldingsLLCMember" xlink:to="lab_arcc_BorrowerR365HoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonPeoNeoAvgCompActuallyPaidAmt_terseLabel_en-US" xlink:label="lab_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-PEO NEO Average Compensation Actually Paid Amount</link:label>
    <link:label id="lab_ecd_NonPeoNeoAvgCompActuallyPaidAmt_label_en-US" xlink:label="lab_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-PEO NEO Average Compensation Actually Paid Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonPeoNeoAvgCompActuallyPaidAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:to="lab_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentCompanyDebtToEquityLeverageRatio_019fed4d-3e56-7130-a8eb-9d05589a43c7_terseLabel_en-US" xlink:label="lab_arcc_InvestmentCompanyDebtToEquityLeverageRatio" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt to equity leverage ratio</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDebtToEquityLeverageRatio_label_en-US" xlink:label="lab_arcc_InvestmentCompanyDebtToEquityLeverageRatio" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Debt To Equity, Leverage Ratio</link:label>
    <link:label id="lab_arcc_InvestmentCompanyDebtToEquityLeverageRatio_documentation_en-US" xlink:label="lab_arcc_InvestmentCompanyDebtToEquityLeverageRatio" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Company, Debt To Equity, Leverage Ratio</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentCompanyDebtToEquityLeverageRatio" xlink:href="arcc-20260930.xsd#arcc_InvestmentCompanyDebtToEquityLeverageRatio"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentCompanyDebtToEquityLeverageRatio" xlink:to="lab_arcc_InvestmentCompanyDebtToEquityLeverageRatio" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_January2038CLOSecuredNotesMember_01a03478-27a8-768f-949c-e21c39c99113_terseLabel_en-US" xlink:label="lab_arcc_January2038CLOSecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">January 2038 CLO Secured Notes</link:label>
    <link:label id="lab_arcc_January2038CLOSecuredNotesMember_label_en-US" xlink:label="lab_arcc_January2038CLOSecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">January 2038 CLO Secured Notes [Member]</link:label>
    <link:label id="lab_arcc_January2038CLOSecuredNotesMember_documentation_en-US" xlink:label="lab_arcc_January2038CLOSecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">January 2038 CLO Secured Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_January2038CLOSecuredNotesMember" xlink:href="arcc-20260930.xsd#arcc_January2038CLOSecuredNotesMember"/>
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    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_019fed4d-3d42-7983-bee6-31d26edafde9_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplemental Information:</link:label>
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalCashFlowInformationAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="lab_us-gaap_SupplementalCashFlowInformationAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_FirebirdAcquisitionCorpInc.Member_019fed4d-3e56-7374-a818-194eb1b936e8_terseLabel_en-US" xlink:label="lab_arcc_FirebirdAcquisitionCorpInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Firebird Acquisition Corp, Inc.</link:label>
    <link:label id="lab_arcc_FirebirdAcquisitionCorpInc.Member_label_en-US" xlink:label="lab_arcc_FirebirdAcquisitionCorpInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Firebird Acquisition Corp, Inc. [Member]</link:label>
    <link:label id="lab_arcc_FirebirdAcquisitionCorpInc.Member_documentation_en-US" xlink:label="lab_arcc_FirebirdAcquisitionCorpInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Firebird Acquisition Corp, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_FirebirdAcquisitionCorpInc.Member" xlink:href="arcc-20260930.xsd#arcc_FirebirdAcquisitionCorpInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_FirebirdAcquisitionCorpInc.Member" xlink:to="lab_arcc_FirebirdAcquisitionCorpInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeoName_terseLabel_en-US" xlink:label="lab_ecd_PeoName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO Name</link:label>
    <link:label id="lab_ecd_PeoName_label_en-US" xlink:label="lab_ecd_PeoName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PeoName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoName" xlink:to="lab_ecd_PeoName" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NorthwindsHoldingIncAndNorthwindsServicesGroupLLCMember_019fed4d-3dd3-7b1a-8f4d-a628bd7f6493_terseLabel_en-US" xlink:label="lab_arcc_NorthwindsHoldingIncAndNorthwindsServicesGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Northwinds Holding, Inc. and Northwinds Services Group LLC</link:label>
    <link:label id="lab_arcc_NorthwindsHoldingIncAndNorthwindsServicesGroupLLCMember_label_en-US" xlink:label="lab_arcc_NorthwindsHoldingIncAndNorthwindsServicesGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Northwinds Holding, Inc. and Northwinds Services Group LLC [Member]</link:label>
    <link:label id="lab_arcc_NorthwindsHoldingIncAndNorthwindsServicesGroupLLCMember_documentation_en-US" xlink:label="lab_arcc_NorthwindsHoldingIncAndNorthwindsServicesGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Northwinds Holding, Inc. and Northwinds Services Group LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NorthwindsHoldingIncAndNorthwindsServicesGroupLLCMember" xlink:href="arcc-20260930.xsd#arcc_NorthwindsHoldingIncAndNorthwindsServicesGroupLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NorthwindsHoldingIncAndNorthwindsServicesGroupLLCMember" xlink:to="lab_arcc_NorthwindsHoldingIncAndNorthwindsServicesGroupLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DecoPacInc.AndDecorationParentLPMember_01a154c7-96a6-71eb-bd9f-25dd4e3a92f5_terseLabel_en-US" xlink:label="lab_arcc_DecoPacInc.AndDecorationParentLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DecoPac, Inc. and Decoration Parent, LP</link:label>
    <link:label id="lab_arcc_DecoPacInc.AndDecorationParentLPMember_label_en-US" xlink:label="lab_arcc_DecoPacInc.AndDecorationParentLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">DecoPac, Inc. and Decoration Parent, LP [Member]</link:label>
    <link:label id="lab_arcc_DecoPacInc.AndDecorationParentLPMember_documentation_en-US" xlink:label="lab_arcc_DecoPacInc.AndDecorationParentLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">DecoPac, Inc. and Decoration Parent, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DecoPacInc.AndDecorationParentLPMember" xlink:href="arcc-20260930.xsd#arcc_DecoPacInc.AndDecorationParentLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DecoPacInc.AndDecorationParentLPMember" xlink:to="lab_arcc_DecoPacInc.AndDecorationParentLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AutomobilesAndComponentsSectorMember_019fed4d-3d41-71ec-823c-f4181c56e650_terseLabel_en-US" xlink:label="lab_arcc_AutomobilesAndComponentsSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Automobiles and Components</link:label>
    <link:label id="lab_arcc_AutomobilesAndComponentsSectorMember_label_en-US" xlink:label="lab_arcc_AutomobilesAndComponentsSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Automobiles And Components Sector [Member]</link:label>
    <link:label id="lab_arcc_AutomobilesAndComponentsSectorMember_documentation_en-US" xlink:label="lab_arcc_AutomobilesAndComponentsSectorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Automobiles And Components Sector</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AutomobilesAndComponentsSectorMember" xlink:href="arcc-20260930.xsd#arcc_AutomobilesAndComponentsSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AutomobilesAndComponentsSectorMember" xlink:to="lab_arcc_AutomobilesAndComponentsSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_StkPrcOrTsrEstimationMethodTextBlock_terseLabel_en-US" xlink:label="lab_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Price or TSR Estimation Method</link:label>
    <link:label id="lab_ecd_StkPrcOrTsrEstimationMethodTextBlock_label_en-US" xlink:label="lab_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Price or TSR Estimation Method [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_StkPrcOrTsrEstimationMethodTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:to="lab_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_019fed4d-3e56-7ad0-869f-5f5b73d5a536_terseLabel_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_label_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityTaxIdentificationNumber" xlink:to="lab_dei_EntityTaxIdentificationNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_019fed4d-3e56-7b48-802e-dcf491660c72_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments and Hedging Activities Disclosures [Table]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments and Hedging Activities Disclosures [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable" xlink:to="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestAndDividendIncomeSecurities_019fed4d-3e56-76af-912c-b628ed0ebb6f_terseLabel_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeSecurities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment income</link:label>
    <link:label id="lab_us-gaap_InterestAndDividendIncomeSecurities_label_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeSecurities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Dividend Income, Securities, Operating</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeSecurities" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestAndDividendIncomeSecurities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndDividendIncomeSecurities" xlink:to="lab_us-gaap_InterestAndDividendIncomeSecurities" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherCommitmentsLineItems_019fed4d-3d42-7737-acba-dd4d024b3c85_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Commitments [Line Items]</link:label>
    <link:label id="lab_us-gaap_OtherCommitmentsLineItems_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Commitments [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherCommitmentsLineItems" xlink:to="lab_us-gaap_OtherCommitmentsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationTerminationFee_01a17ad2-aa3a-7255-b53a-76aa6be5039b_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationTerminationFee" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Termination fee</link:label>
    <link:label id="lab_arcc_BusinessCombinationTerminationFee_label_en-US" xlink:label="lab_arcc_BusinessCombinationTerminationFee" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Termination Fee</link:label>
    <link:label id="lab_arcc_BusinessCombinationTerminationFee_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationTerminationFee" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Termination Fee</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationTerminationFee" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationTerminationFee"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationTerminationFee" xlink:to="lab_arcc_BusinessCombinationTerminationFee" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevenueRecognitionPolicyTextBlock_019fed4d-3e56-7b41-8cb1-68aa340445ad_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueRecognitionPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Structuring Service Fees and Other Income</link:label>
    <link:label id="lab_us-gaap_RevenueRecognitionPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_RevenueRecognitionPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRecognitionPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRecognitionPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueRecognitionPolicyTextBlock" xlink:to="lab_us-gaap_RevenueRecognitionPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ManagementFeePayable_019fed4d-3dd3-70c6-b023-6acd20cd5d4a_terseLabel_en-US" xlink:label="lab_us-gaap_ManagementFeePayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base management fee payable</link:label>
    <link:label id="lab_us-gaap_ManagementFeePayable_label_en-US" xlink:label="lab_us-gaap_ManagementFeePayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Management Fee Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ManagementFeePayable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ManagementFeePayable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ManagementFeePayable" xlink:to="lab_us-gaap_ManagementFeePayable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TVGCCBuyerLLCAndTVGCCHoldingsLPMember_01a159b3-b36f-7a78-b789-d54c7c74b08e_terseLabel_en-US" xlink:label="lab_arcc_TVGCCBuyerLLCAndTVGCCHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TVG-CC Buyer, LLC and TVG-CC Holdings, LP</link:label>
    <link:label id="lab_arcc_TVGCCBuyerLLCAndTVGCCHoldingsLPMember_label_en-US" xlink:label="lab_arcc_TVGCCBuyerLLCAndTVGCCHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TVG-CC Buyer, LLC and TVG-CC Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_TVGCCBuyerLLCAndTVGCCHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_TVGCCBuyerLLCAndTVGCCHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TVG-CC Buyer, LLC and TVG-CC Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TVGCCBuyerLLCAndTVGCCHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_TVGCCBuyerLLCAndTVGCCHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TVGCCBuyerLLCAndTVGCCHoldingsLPMember" xlink:to="lab_arcc_TVGCCBuyerLLCAndTVGCCHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_019fed4d-3d42-7e73-b21a-5074d4e1f627_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_label_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityIncorporationStateCountryCode" xlink:to="lab_dei_EntityIncorporationStateCountryCode" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BaseRateMember_019fed4d-3dd3-7466-93ab-74bbe2bb0852_terseLabel_en-US" xlink:label="lab_us-gaap_BaseRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base Rate</link:label>
    <link:label id="lab_us-gaap_BaseRateMember_label_en-US" xlink:label="lab_us-gaap_BaseRateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Base Rate [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BaseRateMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BaseRateMember" xlink:to="lab_us-gaap_BaseRateMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SageSureHoldingsLLCInsightCatastropheGroupLLCMember_019fed4d-3e56-7ae2-9a17-60bc5e893706_terseLabel_en-US" xlink:label="lab_arcc_SageSureHoldingsLLCInsightCatastropheGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SageSure Holdings, LLC &amp; Insight Catastrophe Group, LLC</link:label>
    <link:label id="lab_arcc_SageSureHoldingsLLCInsightCatastropheGroupLLCMember_label_en-US" xlink:label="lab_arcc_SageSureHoldingsLLCInsightCatastropheGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SageSure Holdings, LLC &amp; Insight Catastrophe Group, LLC [Member]</link:label>
    <link:label id="lab_arcc_SageSureHoldingsLLCInsightCatastropheGroupLLCMember_documentation_en-US" xlink:label="lab_arcc_SageSureHoldingsLLCInsightCatastropheGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">SageSure Holdings, LLC &amp; Insight Catastrophe Group, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SageSureHoldingsLLCInsightCatastropheGroupLLCMember" xlink:href="arcc-20260930.xsd#arcc_SageSureHoldingsLLCInsightCatastropheGroupLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SageSureHoldingsLLCInsightCatastropheGroupLLCMember" xlink:to="lab_arcc_SageSureHoldingsLLCInsightCatastropheGroupLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember_019fed4d-3e56-7f8c-a4e1-26011a698684_terseLabel_en-US" xlink:label="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Kellermeyer Bergensons Services, LLC and KBS TopCo, LLC</link:label>
    <link:label id="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember_label_en-US" xlink:label="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Kellermeyer Bergensons Services, LLC and KBS TopCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember_documentation_en-US" xlink:label="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Kellermeyer Bergensons Services, LLC and KBS TopCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:to="lab_arcc_KellermeyerBergensonsServicesLLCAndKBSTopCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AggtErrCompNotYetDeterminedTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Not Yet Determined</link:label>
    <link:label id="lab_ecd_AggtErrCompNotYetDeterminedTextBlock_label_en-US" xlink:label="lab_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Not Yet Determined [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AggtErrCompNotYetDeterminedTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:to="lab_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ManagementAndServiceFeesIncentiveRate_019fed4d-3d42-7f3f-b46e-68b8c4ff1dc9_terseLabel_en-US" xlink:label="lab_us-gaap_ManagementAndServiceFeesIncentiveRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incentive fee</link:label>
    <link:label id="lab_us-gaap_ManagementAndServiceFeesIncentiveRate_label_en-US" xlink:label="lab_us-gaap_ManagementAndServiceFeesIncentiveRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Management and Service Fees, Incentive Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ManagementAndServiceFeesIncentiveRate" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ManagementAndServiceFeesIncentiveRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ManagementAndServiceFeesIncentiveRate" xlink:to="lab_us-gaap_ManagementAndServiceFeesIncentiveRate" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember_019fed4d-3dd3-70f3-8c2f-193eafc91798_terseLabel_en-US" xlink:label="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pathway Vet Alliance LLC and Jedi Group Holdings LLC</link:label>
    <link:label id="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pathway Vet Alliance LLC and Jedi Group Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pathway Vet Alliance LLC and Jedi Group Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:to="lab_arcc_PathwayVetAllianceLLCAndJediGroupHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_MtrlTermsOfTrdArrTextBlock_terseLabel_en-US" xlink:label="lab_ecd_MtrlTermsOfTrdArrTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Material Terms of Trading Arrangement</link:label>
    <link:label id="lab_ecd_MtrlTermsOfTrdArrTextBlock_label_en-US" xlink:label="lab_ecd_MtrlTermsOfTrdArrTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Material Terms of Trading Arrangement [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MtrlTermsOfTrdArrTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_MtrlTermsOfTrdArrTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_MtrlTermsOfTrdArrTextBlock" xlink:to="lab_ecd_MtrlTermsOfTrdArrTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember_terseLabel_en-US" xlink:label="lab_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year</link:label>
    <link:label id="lab_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember_label_en-US" xlink:label="lab_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:to="lab_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_July2038CLOSecuredNotesMember_01a07fba-b394-7bf1-be55-59953343d9e4_terseLabel_en-US" xlink:label="lab_arcc_July2038CLOSecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 2038 CLO Notes</link:label>
    <link:label id="lab_arcc_July2038CLOSecuredNotesMember_label_en-US" xlink:label="lab_arcc_July2038CLOSecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">July 2038 CLO Secured Notes [Member]</link:label>
    <link:label id="lab_arcc_July2038CLOSecuredNotesMember_documentation_en-US" xlink:label="lab_arcc_July2038CLOSecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">July 2038 CLO Secured Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_July2038CLOSecuredNotesMember" xlink:href="arcc-20260930.xsd#arcc_July2038CLOSecuredNotesMember"/>
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    <link:label id="lab_us-gaap_DebtInstrumentAxis_019fed4d-3dd3-7275-abbc-17b0e854bca0_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentAxis_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentAxis" xlink:to="lab_us-gaap_DebtInstrumentAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ATLPrecisionBidcoLLCAndATLPrecisionHoldingsLPMember_01a154e9-efe7-7382-9380-e3168ab795a0_terseLabel_en-US" xlink:label="lab_arcc_ATLPrecisionBidcoLLCAndATLPrecisionHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ATL Precision Bidco, LLC and ATL Precision Holdings, LP</link:label>
    <link:label id="lab_arcc_ATLPrecisionBidcoLLCAndATLPrecisionHoldingsLPMember_label_en-US" xlink:label="lab_arcc_ATLPrecisionBidcoLLCAndATLPrecisionHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ATL Precision Bidco, LLC and ATL Precision Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_ATLPrecisionBidcoLLCAndATLPrecisionHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_ATLPrecisionBidcoLLCAndATLPrecisionHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ATL Precision Bidco, LLC and ATL Precision Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ATLPrecisionBidcoLLCAndATLPrecisionHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_ATLPrecisionBidcoLLCAndATLPrecisionHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ATLPrecisionBidcoLLCAndATLPrecisionHoldingsLPMember" xlink:to="lab_arcc_ATLPrecisionBidcoLLCAndATLPrecisionHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventTable_019fed4d-3d42-7d89-b30d-147a7f0acdeb_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Table]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTable_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTable" xlink:to="lab_us-gaap_SubsequentEventTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember_019fed4d-3d42-74ec-95fe-3c717a24562f_terseLabel_en-US" xlink:label="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving and delayed draw loan commitments</link:label>
    <link:label id="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember_label_en-US" xlink:label="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving and Delayed Draw Loan Commitments [Member]</link:label>
    <link:label id="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember_documentation_en-US" xlink:label="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revolving and Delayed Draw Loan Commitments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:href="arcc-20260930.xsd#arcc_RevolvingAndDelayedDrawLoanCommitmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:to="lab_arcc_RevolvingAndDelayedDrawLoanCommitmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember_019fed4d-3d42-749f-9241-36341383a003_terseLabel_en-US" xlink:label="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mavis Tire Express Services Topco Corp., Metis HoldCo, Inc., and Metis TopCo, LP</link:label>
    <link:label id="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember_label_en-US" xlink:label="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mavis Tire Express Services Topco Corp., Metis HoldCo, Inc., and Metis TopCo, LP [Member]</link:label>
    <link:label id="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember_documentation_en-US" xlink:label="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mavis Tire Express Services Topco Corp., Metis HoldCo, Inc., and Metis TopCo, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember" xlink:href="arcc-20260930.xsd#arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember" xlink:to="lab_arcc_MavisTireExpressServicesTopcoCorpMetisHoldCoIncAndMetisTopCoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GalwayBorrowerLLCMember_019fed4d-3d42-7406-af07-7f0268396508_terseLabel_en-US" xlink:label="lab_arcc_GalwayBorrowerLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Galway Borrower LLC</link:label>
    <link:label id="lab_arcc_GalwayBorrowerLLCMember_label_en-US" xlink:label="lab_arcc_GalwayBorrowerLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Galway Borrower LLC [Member]</link:label>
    <link:label id="lab_arcc_GalwayBorrowerLLCMember_documentation_en-US" xlink:label="lab_arcc_GalwayBorrowerLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Galway Borrower LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GalwayBorrowerLLCMember" xlink:href="arcc-20260930.xsd#arcc_GalwayBorrowerLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GalwayBorrowerLLCMember" xlink:to="lab_arcc_GalwayBorrowerLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SpindriftBeverageCo.Inc.AndSBCAggregatorLPMember_019fed4d-3e56-7d7a-abb8-18b25eeb7e39_terseLabel_en-US" xlink:label="lab_arcc_SpindriftBeverageCo.Inc.AndSBCAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Spindrift Beverage Co., Inc. and SBC Aggregator LP</link:label>
    <link:label id="lab_arcc_SpindriftBeverageCo.Inc.AndSBCAggregatorLPMember_label_en-US" xlink:label="lab_arcc_SpindriftBeverageCo.Inc.AndSBCAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Spindrift Beverage Co., Inc. and SBC Aggregator LP [Member]</link:label>
    <link:label id="lab_arcc_SpindriftBeverageCo.Inc.AndSBCAggregatorLPMember_documentation_en-US" xlink:label="lab_arcc_SpindriftBeverageCo.Inc.AndSBCAggregatorLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Spindrift Beverage Co., Inc. and SBC Aggregator LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SpindriftBeverageCo.Inc.AndSBCAggregatorLPMember" xlink:href="arcc-20260930.xsd#arcc_SpindriftBeverageCo.Inc.AndSBCAggregatorLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SpindriftBeverageCo.Inc.AndSBCAggregatorLPMember" xlink:to="lab_arcc_SpindriftBeverageCo.Inc.AndSBCAggregatorLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ConveyHealthSolutionsIncMember_019fed4d-3dd3-7320-bf76-44d340983292_terseLabel_en-US" xlink:label="lab_arcc_ConveyHealthSolutionsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Convey Health Solutions, Inc.</link:label>
    <link:label id="lab_arcc_ConveyHealthSolutionsIncMember_label_en-US" xlink:label="lab_arcc_ConveyHealthSolutionsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Convey Health Solutions, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ConveyHealthSolutionsIncMember_documentation_en-US" xlink:label="lab_arcc_ConveyHealthSolutionsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Convey Health Solutions, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ConveyHealthSolutionsIncMember" xlink:href="arcc-20260930.xsd#arcc_ConveyHealthSolutionsIncMember"/>
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    <link:label id="lab_us-gaap_RelatedPartyTransactionAmountsOfTransaction_019fed4d-3d42-784c-8417-727d35f39f37_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related party transaction amounts payable</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionAmountsOfTransaction_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction, Amounts of Transaction</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:to="lab_us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationClosingPricePercentageOfClosingNetAssetValue_01a17ad2-3371-7126-a7c6-ee0b09730ff0_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPricePercentageOfClosingNetAssetValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Closing price</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPricePercentageOfClosingNetAssetValue_label_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPricePercentageOfClosingNetAssetValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Percentage Of Closing Net Asset Value</link:label>
    <link:label id="lab_arcc_BusinessCombinationClosingPricePercentageOfClosingNetAssetValue_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationClosingPricePercentageOfClosingNetAssetValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Closing Price, Percentage Of Closing Net Asset Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationClosingPricePercentageOfClosingNetAssetValue" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationClosingPricePercentageOfClosingNetAssetValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationClosingPricePercentageOfClosingNetAssetValue" xlink:to="lab_arcc_BusinessCombinationClosingPricePercentageOfClosingNetAssetValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_019fed4d-3dd3-7572-8437-6f8e62396ce4_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Basic net income per common share (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_019fed4d-3dd3-7b3f-a5b8-8276e1eb893b_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net increase in stockholders&#8217; equity resulting from operations per share&#8212;basic (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Basic</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
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    <link:label id="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales_019fed4d-3d42-702b-a159-8ec87c0f181e_terseLabel_en-US" xlink:label="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sales (cost)</link:label>
    <link:label id="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales_label_en-US" xlink:label="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments In And Advances To Affiliates, At Fair Value, Gross Reductions, Sales</link:label>
    <link:label id="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales_documentation_en-US" xlink:label="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investments In And Advances To Affiliates, At Fair Value, Gross Reductions, Sales</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales" xlink:href="arcc-20260930.xsd#arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales" xlink:to="lab_arcc_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductionsSales" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MeasurementInputTypeAxis_019fed4d-3d42-7f8c-b272-638567527fee_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement Input Type [Axis]</link:label>
    <link:label id="lab_us-gaap_MeasurementInputTypeAxis_label_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputTypeAxis" xlink:to="lab_us-gaap_MeasurementInputTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_InsiderTradingArrLineItems_label_en-US" xlink:label="lab_ecd_InsiderTradingArrLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insider Trading Arrangements [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_InsiderTradingArrLineItems" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_InsiderTradingArrLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="lab_ecd_InsiderTradingArrLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ThermostatPurchaserIIIIncMember_019fed4d-3dd3-7e6d-86ee-2cc73de97186_terseLabel_en-US" xlink:label="lab_arcc_ThermostatPurchaserIIIIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Thermostat Purchaser III, Inc.</link:label>
    <link:label id="lab_arcc_ThermostatPurchaserIIIIncMember_label_en-US" xlink:label="lab_arcc_ThermostatPurchaserIIIIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Thermostat Purchaser III, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ThermostatPurchaserIIIIncMember_documentation_en-US" xlink:label="lab_arcc_ThermostatPurchaserIIIIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Thermostat Purchaser III, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ThermostatPurchaserIIIIncMember" xlink:href="arcc-20260930.xsd#arcc_ThermostatPurchaserIIIIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ThermostatPurchaserIIIIncMember" xlink:to="lab_arcc_ThermostatPurchaserIIIIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_RialtoManagementGroupLLCMember_019fed4d-3e56-7a8c-aa28-ab800ae83677_terseLabel_en-US" xlink:label="lab_arcc_RialtoManagementGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rialto Management Group, LLC</link:label>
    <link:label id="lab_arcc_RialtoManagementGroupLLCMember_label_en-US" xlink:label="lab_arcc_RialtoManagementGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rialto Management Group, LLC [Member]</link:label>
    <link:label id="lab_arcc_RialtoManagementGroupLLCMember_documentation_en-US" xlink:label="lab_arcc_RialtoManagementGroupLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rialto Management Group, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_RialtoManagementGroupLLCMember" xlink:href="arcc-20260930.xsd#arcc_RialtoManagementGroupLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_RialtoManagementGroupLLCMember" xlink:to="lab_arcc_RialtoManagementGroupLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member_019fed4d-3e56-7b69-a026-224218bf5fc2_terseLabel_en-US" xlink:label="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Eclipse Topco, Inc., Eclipse Investor Parent, L.P. and Eclipse Buyer, Inc.</link:label>
    <link:label id="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member_label_en-US" xlink:label="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Eclipse Topco, Inc., Eclipse Investor Parent, L.P. and Eclipse Buyer, Inc. [Member]</link:label>
    <link:label id="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member_documentation_en-US" xlink:label="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eclipse Topco, Inc., Eclipse Investor Parent, L.P. and Eclipse Buyer, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:href="arcc-20260930.xsd#arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:to="lab_arcc_EclipseTopcoInc.EclipseInvestorParentL.P.AndEclipseBuyerInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AirxClimateSolutionsInc.Member_019fed4d-3dd3-76cb-8263-ebd4aa964929_terseLabel_en-US" xlink:label="lab_arcc_AirxClimateSolutionsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Airx Climate Solutions, Inc.</link:label>
    <link:label id="lab_arcc_AirxClimateSolutionsInc.Member_label_en-US" xlink:label="lab_arcc_AirxClimateSolutionsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Airx Climate Solutions, Inc. [Member]</link:label>
    <link:label id="lab_arcc_AirxClimateSolutionsInc.Member_documentation_en-US" xlink:label="lab_arcc_AirxClimateSolutionsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Airx Climate Solutions, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AirxClimateSolutionsInc.Member" xlink:href="arcc-20260930.xsd#arcc_AirxClimateSolutionsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AirxClimateSolutionsInc.Member" xlink:to="lab_arcc_AirxClimateSolutionsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_IQNHoldingCorp.Member_019fed4d-3e56-7b10-ab9f-77d4927b7331_terseLabel_en-US" xlink:label="lab_arcc_IQNHoldingCorp.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">IQN Holding Corp.</link:label>
    <link:label id="lab_arcc_IQNHoldingCorp.Member_label_en-US" xlink:label="lab_arcc_IQNHoldingCorp.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IQN Holding Corp. [Member]</link:label>
    <link:label id="lab_arcc_IQNHoldingCorp.Member_documentation_en-US" xlink:label="lab_arcc_IQNHoldingCorp.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">IQN Holding Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_IQNHoldingCorp.Member" xlink:href="arcc-20260930.xsd#arcc_IQNHoldingCorp.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_IQNHoldingCorp.Member" xlink:to="lab_arcc_IQNHoldingCorp.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PetrusBuyerInc.Member_019fed4d-3dd3-7ec6-956b-d8be1ee29942_terseLabel_en-US" xlink:label="lab_arcc_PetrusBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Petrus Buyer, Inc.</link:label>
    <link:label id="lab_arcc_PetrusBuyerInc.Member_label_en-US" xlink:label="lab_arcc_PetrusBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Petrus Buyer, Inc. [Member]</link:label>
    <link:label id="lab_arcc_PetrusBuyerInc.Member_documentation_en-US" xlink:label="lab_arcc_PetrusBuyerInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Petrus Buyer, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PetrusBuyerInc.Member" xlink:href="arcc-20260930.xsd#arcc_PetrusBuyerInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PetrusBuyerInc.Member" xlink:to="lab_arcc_PetrusBuyerInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TPGIXCardiffDebtHoldCoILLCTPGIXCardiffDebtHoldcoIILLCTPGIXCardiffCIIL.P.AndTPGIXCardiffCIIIL.P.Member_019fed4d-3dd3-7068-8fd1-d661bd2591ee_terseLabel_en-US" xlink:label="lab_arcc_TPGIXCardiffDebtHoldCoILLCTPGIXCardiffDebtHoldcoIILLCTPGIXCardiffCIIL.P.AndTPGIXCardiffCIIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TPG IX Cardiff Debt HoldCo I, LLC, TPG IX Cardiff Debt Holdco II, LLC, TPG IX Cardiff CI I, L.P., and TPG IX Cardiff CI II, L.P.</link:label>
    <link:label id="lab_arcc_TPGIXCardiffDebtHoldCoILLCTPGIXCardiffDebtHoldcoIILLCTPGIXCardiffCIIL.P.AndTPGIXCardiffCIIIL.P.Member_label_en-US" xlink:label="lab_arcc_TPGIXCardiffDebtHoldCoILLCTPGIXCardiffDebtHoldcoIILLCTPGIXCardiffCIIL.P.AndTPGIXCardiffCIIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TPG IX Cardiff Debt HoldCo I, LLC, TPG IX Cardiff Debt Holdco II, LLC, TPG IX Cardiff CI I, L.P., and TPG IX Cardiff CI II, L.P. [Member]</link:label>
    <link:label id="lab_arcc_TPGIXCardiffDebtHoldCoILLCTPGIXCardiffDebtHoldcoIILLCTPGIXCardiffCIIL.P.AndTPGIXCardiffCIIIL.P.Member_documentation_en-US" xlink:label="lab_arcc_TPGIXCardiffDebtHoldCoILLCTPGIXCardiffDebtHoldcoIILLCTPGIXCardiffCIIL.P.AndTPGIXCardiffCIIIL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TPG IX Cardiff Debt HoldCo I, LLC, TPG IX Cardiff Debt Holdco II, LLC, TPG IX Cardiff CI I, L.P., and TPG IX Cardiff CI II, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TPGIXCardiffDebtHoldCoILLCTPGIXCardiffDebtHoldcoIILLCTPGIXCardiffCIIL.P.AndTPGIXCardiffCIIIL.P.Member" xlink:href="arcc-20260930.xsd#arcc_TPGIXCardiffDebtHoldCoILLCTPGIXCardiffDebtHoldcoIILLCTPGIXCardiffCIIL.P.AndTPGIXCardiffCIIIL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TPGIXCardiffDebtHoldCoILLCTPGIXCardiffDebtHoldcoIILLCTPGIXCardiffCIIL.P.AndTPGIXCardiffCIIIL.P.Member" xlink:to="lab_arcc_TPGIXCardiffDebtHoldCoILLCTPGIXCardiffDebtHoldcoIILLCTPGIXCardiffCIIL.P.AndTPGIXCardiffCIIIL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DebtInstrumentNumberOfExtensionOptions_019fed4d-3dd3-70c8-ae47-a1b551495e62_terseLabel_en-US" xlink:label="lab_arcc_DebtInstrumentNumberOfExtensionOptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of debt maturity extensions</link:label>
    <link:label id="lab_arcc_DebtInstrumentNumberOfExtensionOptions_label_en-US" xlink:label="lab_arcc_DebtInstrumentNumberOfExtensionOptions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Number Of Extension Options</link:label>
    <link:label id="lab_arcc_DebtInstrumentNumberOfExtensionOptions_documentation_en-US" xlink:label="lab_arcc_DebtInstrumentNumberOfExtensionOptions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Number Of Extension Options</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DebtInstrumentNumberOfExtensionOptions" xlink:href="arcc-20260930.xsd#arcc_DebtInstrumentNumberOfExtensionOptions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DebtInstrumentNumberOfExtensionOptions" xlink:to="lab_arcc_DebtInstrumentNumberOfExtensionOptions" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember_terseLabel_en-US" xlink:label="lab_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table</link:label>
    <link:label id="lab_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember_label_en-US" xlink:label="lab_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:to="lab_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember_019fed4d-3dd3-740c-ad7f-2c10c7f0d19c_terseLabel_en-US" xlink:label="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OakBridge Insurance Agency LLC and Maple Acquisition Holdings, LP</link:label>
    <link:label id="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember_label_en-US" xlink:label="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OakBridge Insurance Agency LLC and Maple Acquisition Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OakBridge Insurance Agency LLC and Maple Acquisition Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:to="lab_arcc_OakBridgeInsuranceAgencyLLCAndMapleAcquisitionHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount_019fed4d-3e56-7063-b8a9-f6f073b89c03_totalLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total unfunded equity commitments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount_019fed4d-3e56-7f85-9e0f-43319119619b_verboseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total unfunded capital commitments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount_019fed4d-3e56-7bd8-8911-946f1f3a3744_netLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US">Commitments to fund delayed draw loans</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount_019fed4d-3e56-7977-94c3-2b5b6e9e7135_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total net unfunded revolving loan commitments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount_019fed4d-3e56-7031-bcab-c2d9f199c030_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Unfunded revolving and delayed draw loan commitments</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:to="lab_us-gaap_InvestmentCompanyFinancialCommitmentToInvesteeFutureAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueDisclosureItemAmountsDomain_019fed4d-3d42-7add-8978-72385f612cdb_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosureItemAmountsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Measurement [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosureItemAmountsDomain_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosureItemAmountsDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain" xlink:to="lab_us-gaap_FairValueDisclosureItemAmountsDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AresCapitalCorporationMember_019fed4d-3e56-7c92-adaa-5cf514b7b754_terseLabel_en-US" xlink:label="lab_arcc_AresCapitalCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ares Capital Corporation</link:label>
    <link:label id="lab_arcc_AresCapitalCorporationMember_label_en-US" xlink:label="lab_arcc_AresCapitalCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ares Capital Corporation [Member]</link:label>
    <link:label id="lab_arcc_AresCapitalCorporationMember_documentation_en-US" xlink:label="lab_arcc_AresCapitalCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ares Capital Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AresCapitalCorporationMember" xlink:href="arcc-20260930.xsd#arcc_AresCapitalCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AresCapitalCorporationMember" xlink:to="lab_arcc_AresCapitalCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock_terseLabel_en-US" xlink:label="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Company Selected Measure</link:label>
    <link:label id="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock_label_en-US" xlink:label="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Company Selected Measure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:to="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CoverAbstract_label_en-US" xlink:label="lab_dei_CoverAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cover [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CoverAbstract" xlink:to="lab_dei_CoverAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_USSaltInvestorsLLCAndEmeraldLakePearlAcquisitionALPMember_019fed4d-3d42-7729-82a6-46360bb77095_terseLabel_en-US" xlink:label="lab_arcc_USSaltInvestorsLLCAndEmeraldLakePearlAcquisitionALPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">US Salt Investors, LLC and Emerald Lake Pearl Acquisition-A, L.P.</link:label>
    <link:label id="lab_arcc_USSaltInvestorsLLCAndEmeraldLakePearlAcquisitionALPMember_label_en-US" xlink:label="lab_arcc_USSaltInvestorsLLCAndEmeraldLakePearlAcquisitionALPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Salt Investors, LLC and Emerald Lake Pearl Acquisition-A, L.P. [Member]</link:label>
    <link:label id="lab_arcc_USSaltInvestorsLLCAndEmeraldLakePearlAcquisitionALPMember_documentation_en-US" xlink:label="lab_arcc_USSaltInvestorsLLCAndEmeraldLakePearlAcquisitionALPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">US Salt Investors, LLC and Emerald Lake Pearl Acquisition-A, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_USSaltInvestorsLLCAndEmeraldLakePearlAcquisitionALPMember" xlink:href="arcc-20260930.xsd#arcc_USSaltInvestorsLLCAndEmeraldLakePearlAcquisitionALPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_USSaltInvestorsLLCAndEmeraldLakePearlAcquisitionALPMember" xlink:to="lab_arcc_USSaltInvestorsLLCAndEmeraldLakePearlAcquisitionALPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ScheduleOfCondensedFinancialStatementsTable_01a15f4f-da78-79bd-80af-161dd29d19b8_terseLabel_en-US" xlink:label="lab_srt_ScheduleOfCondensedFinancialStatementsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Condensed Financial Statements [Table]</link:label>
    <link:label id="lab_srt_ScheduleOfCondensedFinancialStatementsTable_label_en-US" xlink:label="lab_srt_ScheduleOfCondensedFinancialStatementsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Financial Statements [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfCondensedFinancialStatementsTable" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfCondensedFinancialStatementsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScheduleOfCondensedFinancialStatementsTable" xlink:to="lab_srt_ScheduleOfCondensedFinancialStatementsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAInc.Member_019fed4d-3d41-75c8-b6b1-ee4495b5272b_terseLabel_en-US" xlink:label="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Professional Fighters League, LLC and PFL MMA, Inc.</link:label>
    <link:label id="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAInc.Member_label_en-US" xlink:label="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Professional Fighters League, LLC And PFL MMA, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAInc.Member_documentation_en-US" xlink:label="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Professional Fighters League, LLC And PFL MMA, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProfessionalFightersLeagueLLCAndPFLMMAInc.Member" xlink:href="arcc-20260930.xsd#arcc_ProfessionalFightersLeagueLLCAndPFLMMAInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProfessionalFightersLeagueLLCAndPFLMMAInc.Member" xlink:to="lab_arcc_ProfessionalFightersLeagueLLCAndPFLMMAInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskPercentage1_019fed4d-3d42-7972-9f56-0d5e4930bf61_verboseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">% of Total Assets, non-qualifying assets</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskPercentage1_019fed4d-3d42-701f-bc37-86e2618eacd8_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Composition, percent of fair value</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskPercentage1_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk, Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskPercentage1" xlink:to="lab_us-gaap_ConcentrationRiskPercentage1" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SaltStoneInc.AndLeilaParentLLCMember_019fed4d-3e56-7b5b-bba4-30a75218e2fe_terseLabel_en-US" xlink:label="lab_arcc_SaltStoneInc.AndLeilaParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Salt &amp; Stone, Inc. and Leila Parent, LLC</link:label>
    <link:label id="lab_arcc_SaltStoneInc.AndLeilaParentLLCMember_label_en-US" xlink:label="lab_arcc_SaltStoneInc.AndLeilaParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Salt &amp; Stone, Inc. and Leila Parent, LLC [Member]</link:label>
    <link:label id="lab_arcc_SaltStoneInc.AndLeilaParentLLCMember_documentation_en-US" xlink:label="lab_arcc_SaltStoneInc.AndLeilaParentLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Salt &amp; Stone, Inc. and Leila Parent, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SaltStoneInc.AndLeilaParentLLCMember" xlink:href="arcc-20260930.xsd#arcc_SaltStoneInc.AndLeilaParentLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SaltStoneInc.AndLeilaParentLLCMember" xlink:to="lab_arcc_SaltStoneInc.AndLeilaParentLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EqtyAwrdsAdjsMember_terseLabel_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments</link:label>
    <link:label id="lab_ecd_EqtyAwrdsAdjsMember_label_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsAdjsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_EqtyAwrdsAdjsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EqtyAwrdsAdjsMember" xlink:to="lab_ecd_EqtyAwrdsAdjsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember_019fed4d-3dd3-71c7-a397-fdb6cf659c03_terseLabel_en-US" xlink:label="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Priority Waste Holdings LLC, Priority Waste Holdings Indiana LLC and Priority Waste Super Holdings, LLC</link:label>
    <link:label id="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Priority Waste Holdings LLC, Priority Waste Holdings Indiana LLC and Priority Waste Super Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Priority Waste Holdings LLC, Priority Waste Holdings Indiana LLC and Priority Waste Super Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:to="lab_arcc_PriorityWasteHoldingsLLCPriorityWasteHoldingsIndianaLLCAndPriorityWasteSuperHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DerivativeInstrumentsTableAbstract_019fed4d-3e56-73c9-aca9-bcc8649d4b56_terseLabel_en-US" xlink:label="lab_arcc_DerivativeInstrumentsTableAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments Table [Abstract]</link:label>
    <link:label id="lab_arcc_DerivativeInstrumentsTableAbstract_label_en-US" xlink:label="lab_arcc_DerivativeInstrumentsTableAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments Table [Abstract]</link:label>
    <link:label id="lab_arcc_DerivativeInstrumentsTableAbstract_documentation_en-US" xlink:label="lab_arcc_DerivativeInstrumentsTableAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Derivative Instruments Table</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DerivativeInstrumentsTableAbstract" xlink:href="arcc-20260930.xsd#arcc_DerivativeInstrumentsTableAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DerivativeInstrumentsTableAbstract" xlink:to="lab_arcc_DerivativeInstrumentsTableAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OpenOptionContractsWrittenPremiums_01a169dc-ce69-7ddc-b55f-2efa702d69fa_terseLabel_en-US" xlink:label="lab_us-gaap_OpenOptionContractsWrittenPremiums" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Upfront Payments/Receipts</link:label>
    <link:label id="lab_us-gaap_OpenOptionContractsWrittenPremiums_label_en-US" xlink:label="lab_us-gaap_OpenOptionContractsWrittenPremiums" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Premium Received</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OpenOptionContractsWrittenPremiums" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OpenOptionContractsWrittenPremiums"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OpenOptionContractsWrittenPremiums" xlink:to="lab_us-gaap_OpenOptionContractsWrittenPremiums" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_WUHoldcoInc.Member_019fed4d-3e56-75f9-ae02-c66af3685bd1_terseLabel_en-US" xlink:label="lab_arcc_WUHoldcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">WU Holdco, Inc.</link:label>
    <link:label id="lab_arcc_WUHoldcoInc.Member_label_en-US" xlink:label="lab_arcc_WUHoldcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">WU Holdco, Inc. [Member]</link:label>
    <link:label id="lab_arcc_WUHoldcoInc.Member_documentation_en-US" xlink:label="lab_arcc_WUHoldcoInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">WU Holdco, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_WUHoldcoInc.Member" xlink:href="arcc-20260930.xsd#arcc_WUHoldcoInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_WUHoldcoInc.Member" xlink:to="lab_arcc_WUHoldcoInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EquitySecuritiesIndustryMember_019fed4d-3dd3-7cc8-b1d8-5fc2be24c1f8_terseLabel_en-US" xlink:label="lab_us-gaap_EquitySecuritiesIndustryMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Industry Sector [Domain]</link:label>
    <link:label id="lab_us-gaap_EquitySecuritiesIndustryMember_label_en-US" xlink:label="lab_us-gaap_EquitySecuritiesIndustryMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Industry Sector [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesIndustryMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquitySecuritiesIndustryMember" xlink:to="lab_us-gaap_EquitySecuritiesIndustryMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MajescoAndMagicTopcoLPMember_019fed4d-3d42-7cbe-a183-6162953100b3_terseLabel_en-US" xlink:label="lab_arcc_MajescoAndMagicTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Majesco and Magic Topco, L.P.</link:label>
    <link:label id="lab_arcc_MajescoAndMagicTopcoLPMember_label_en-US" xlink:label="lab_arcc_MajescoAndMagicTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Majesco and Magic Topco, L.P. [Member]</link:label>
    <link:label id="lab_arcc_MajescoAndMagicTopcoLPMember_documentation_en-US" xlink:label="lab_arcc_MajescoAndMagicTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Majesco and Magic Topco, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MajescoAndMagicTopcoLPMember" xlink:href="arcc-20260930.xsd#arcc_MajescoAndMagicTopcoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MajescoAndMagicTopcoLPMember" xlink:to="lab_arcc_MajescoAndMagicTopcoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentOwnedPercentOfNetAssets_019fed4d-3d42-779f-8015-f0b4ab94eb21_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">% of Net Assets</link:label>
    <link:label id="lab_us-gaap_InvestmentOwnedPercentOfNetAssets_label_en-US" xlink:label="lab_us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Net Assets, Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentOwnedPercentOfNetAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:to="lab_us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember_019fed4d-3dd3-703c-baf6-f7a37bcd592b_terseLabel_en-US" xlink:label="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NMC Skincare Intermediate Holdings II, LLC</link:label>
    <link:label id="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember_label_en-US" xlink:label="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NMC Skincare Intermediate Holdings II, LLC [Member]</link:label>
    <link:label id="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember_documentation_en-US" xlink:label="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NMC Skincare Intermediate Holdings II, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:href="arcc-20260930.xsd#arcc_NMCSkincareIntermediateHoldingsIILLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:to="lab_arcc_NMCSkincareIntermediateHoldingsIILLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AresManagementCapitalMarketsMember_019fed4d-3dd3-70b9-b3d7-e704107c2681_terseLabel_en-US" xlink:label="lab_arcc_AresManagementCapitalMarketsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ares Management Capital Markets</link:label>
    <link:label id="lab_arcc_AresManagementCapitalMarketsMember_label_en-US" xlink:label="lab_arcc_AresManagementCapitalMarketsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ares Management Capital Markets [Member]</link:label>
    <link:label id="lab_arcc_AresManagementCapitalMarketsMember_documentation_en-US" xlink:label="lab_arcc_AresManagementCapitalMarketsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ares Management Capital Markets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AresManagementCapitalMarketsMember" xlink:href="arcc-20260930.xsd#arcc_AresManagementCapitalMarketsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AresManagementCapitalMarketsMember" xlink:to="lab_arcc_AresManagementCapitalMarketsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RepaymentsOfSeniorDebt_019fed4d-3dd3-79a1-b718-bd64f9ecb29e_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfSeniorDebt" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repayments and repurchases of debt</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfSeniorDebt_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfSeniorDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Senior Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfSeniorDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfSeniorDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfSeniorDebt" xlink:to="lab_us-gaap_RepaymentsOfSeniorDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ProductionResourceGroupL.L.C.AndPRGIIILLCMember_019fed4d-3d42-73e1-98fe-9e8bc2c9888c_terseLabel_en-US" xlink:label="lab_arcc_ProductionResourceGroupL.L.C.AndPRGIIILLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Production Resource Group, L.L.C. and PRG III, LLC</link:label>
    <link:label id="lab_arcc_ProductionResourceGroupL.L.C.AndPRGIIILLCMember_label_en-US" xlink:label="lab_arcc_ProductionResourceGroupL.L.C.AndPRGIIILLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Production Resource Group, L.L.C. And PRG III, LLC [Member]</link:label>
    <link:label id="lab_arcc_ProductionResourceGroupL.L.C.AndPRGIIILLCMember_documentation_en-US" xlink:label="lab_arcc_ProductionResourceGroupL.L.C.AndPRGIIILLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Production Resource Group, L.L.C. and PRG III, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ProductionResourceGroupL.L.C.AndPRGIIILLCMember" xlink:href="arcc-20260930.xsd#arcc_ProductionResourceGroupL.L.C.AndPRGIIILLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ProductionResourceGroupL.L.C.AndPRGIIILLCMember" xlink:to="lab_arcc_ProductionResourceGroupL.L.C.AndPRGIIILLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost_019fed4d-3dd3-733e-868b-6dd8648683ca_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans on non-accrual status, as a percent of total investments at amortized cost</link:label>
    <link:label id="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost_label_en-US" xlink:label="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Non-Accrual Status, Percent of Cost</link:label>
    <link:label id="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Non-Accrual Status, Percent of Cost</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:href="arcc-20260930.xsd#arcc_InvestmentOwnedNonAccrualStatusPercentOfCost"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:to="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfCost" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BusinessCombinationPricePerShareCashConsideration_01a17ad2-3371-719f-8fff-c8acac92c820_terseLabel_en-US" xlink:label="lab_arcc_BusinessCombinationPricePerShareCashConsideration" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Implied value, cash consideration (in dollars per share)</link:label>
    <link:label id="lab_arcc_BusinessCombinationPricePerShareCashConsideration_label_en-US" xlink:label="lab_arcc_BusinessCombinationPricePerShareCashConsideration" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Price Per Share, Cash Consideration</link:label>
    <link:label id="lab_arcc_BusinessCombinationPricePerShareCashConsideration_documentation_en-US" xlink:label="lab_arcc_BusinessCombinationPricePerShareCashConsideration" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Price Per Share, Cash Consideration</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BusinessCombinationPricePerShareCashConsideration" xlink:href="arcc-20260930.xsd#arcc_BusinessCombinationPricePerShareCashConsideration"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BusinessCombinationPricePerShareCashConsideration" xlink:to="lab_arcc_BusinessCombinationPricePerShareCashConsideration" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MannaProProductsLLCAndMPBlockerALLCMember_019fed4d-3e56-74eb-9660-eb8b32aea9fb_terseLabel_en-US" xlink:label="lab_arcc_MannaProProductsLLCAndMPBlockerALLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Manna Pro Products, LLC and MP Blocker A LLC</link:label>
    <link:label id="lab_arcc_MannaProProductsLLCAndMPBlockerALLCMember_label_en-US" xlink:label="lab_arcc_MannaProProductsLLCAndMPBlockerALLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Manna Pro Products, LLC and MP Blocker A LLC [Member]</link:label>
    <link:label id="lab_arcc_MannaProProductsLLCAndMPBlockerALLCMember_documentation_en-US" xlink:label="lab_arcc_MannaProProductsLLCAndMPBlockerALLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Manna Pro Products, LLC and MP Blocker A LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MannaProProductsLLCAndMPBlockerALLCMember" xlink:href="arcc-20260930.xsd#arcc_MannaProProductsLLCAndMPBlockerALLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MannaProProductsLLCAndMPBlockerALLCMember" xlink:to="lab_arcc_MannaProProductsLLCAndMPBlockerALLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ExtraHopNetworksIncMember_019fed4d-3d42-713f-a0f7-21c4f4edea10_terseLabel_en-US" xlink:label="lab_arcc_ExtraHopNetworksIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ExtraHop Networks, Inc.</link:label>
    <link:label id="lab_arcc_ExtraHopNetworksIncMember_label_en-US" xlink:label="lab_arcc_ExtraHopNetworksIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ExtraHop Networks, Inc. [Member]</link:label>
    <link:label id="lab_arcc_ExtraHopNetworksIncMember_documentation_en-US" xlink:label="lab_arcc_ExtraHopNetworksIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ExtraHop Networks, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ExtraHopNetworksIncMember" xlink:href="arcc-20260930.xsd#arcc_ExtraHopNetworksIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ExtraHopNetworksIncMember" xlink:to="lab_arcc_ExtraHopNetworksIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativesFairValueLineItems_019fed4d-3d42-794a-869b-0eb807ca0c2c_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativesFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:label id="lab_us-gaap_DerivativesFairValueLineItems_label_en-US" xlink:label="lab_us-gaap_DerivativesFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivatives, Fair Value [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativesFairValueLineItems" xlink:to="lab_us-gaap_DerivativesFairValueLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BeaconPointeHarmonyLLCMember_019fed4d-3e56-7310-a465-f828c42d1b81_terseLabel_en-US" xlink:label="lab_arcc_BeaconPointeHarmonyLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Beacon Pointe Harmony, LLC</link:label>
    <link:label id="lab_arcc_BeaconPointeHarmonyLLCMember_label_en-US" xlink:label="lab_arcc_BeaconPointeHarmonyLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Beacon Pointe Harmony, LLC [Member]</link:label>
    <link:label id="lab_arcc_BeaconPointeHarmonyLLCMember_documentation_en-US" xlink:label="lab_arcc_BeaconPointeHarmonyLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Beacon Pointe Harmony, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BeaconPointeHarmonyLLCMember" xlink:href="arcc-20260930.xsd#arcc_BeaconPointeHarmonyLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BeaconPointeHarmonyLLCMember" xlink:to="lab_arcc_BeaconPointeHarmonyLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_019fed4d-3d42-7db7-a7e5-3c64102f0882_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Total distributions to stockholders (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_019fed4d-3d42-71c3-88d6-7ed2157f7207_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total distributions to stockholders (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Distribution to Shareholders, Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyDistributionToShareholdersPerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" xlink:to="lab_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember_019fed4d-3e56-79e4-bb61-53a00935b32e_terseLabel_en-US" xlink:label="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bobcat Purchaser, LLC and Bobcat Topco, L.P.</link:label>
    <link:label id="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember_label_en-US" xlink:label="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bobcat Purchaser, LLC and Bobcat Topco, L.P. [Member]</link:label>
    <link:label id="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember_documentation_en-US" xlink:label="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bobcat Purchaser, LLC and Bobcat Topco, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember" xlink:href="arcc-20260930.xsd#arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember" xlink:to="lab_arcc_BobcatPurchaserLLCAndBobcatTopcoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember_019fed4d-3dd3-7425-9fc2-d0d5dc5f16f9_terseLabel_en-US" xlink:label="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">U.S. Anesthesia Partners, Inc. &amp; U.S. Anesthesia Partners Holdings, Inc.</link:label>
    <link:label id="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember_label_en-US" xlink:label="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">U.S. Anesthesia Partners, Inc. &amp; U.S. Anesthesia Partners Holdings, Inc. [Member]</link:label>
    <link:label id="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember_documentation_en-US" xlink:label="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">U.S. Anesthesia Partners, Inc. &amp; U.S. Anesthesia Partners Holdings, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember" xlink:href="arcc-20260930.xsd#arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember" xlink:to="lab_arcc_USAnesthesiaPartnersIncUSAnesthesiaPartnersHoldingsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_October2036ClassACLOLoansMember_019fed4d-3e56-7942-ab61-adb103abcc31_terseLabel_en-US" xlink:label="lab_arcc_October2036ClassACLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">October 2036 Class A CLO Loans</link:label>
    <link:label id="lab_arcc_October2036ClassACLOLoansMember_label_en-US" xlink:label="lab_arcc_October2036ClassACLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">October 2036 Class A CLO Loans [Member]</link:label>
    <link:label id="lab_arcc_October2036ClassACLOLoansMember_documentation_en-US" xlink:label="lab_arcc_October2036ClassACLOLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">October 2036 Class A CLO Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_October2036ClassACLOLoansMember" xlink:href="arcc-20260930.xsd#arcc_October2036ClassACLOLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_October2036ClassACLOLoansMember" xlink:to="lab_arcc_October2036ClassACLOLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_HedgingDesignationDomain_019fed4d-3e56-7a81-bf97-a3773cb3cc8f_terseLabel_en-US" xlink:label="lab_us-gaap_HedgingDesignationDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hedging Designation [Domain]</link:label>
    <link:label id="lab_us-gaap_HedgingDesignationDomain_label_en-US" xlink:label="lab_us-gaap_HedgingDesignationDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hedging Designation [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HedgingDesignationDomain" xlink:to="lab_us-gaap_HedgingDesignationDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_TCIBuyerLLCAndTCIHoldingsLPMember_019fed4d-3d42-7970-83f6-8455adac45f4_terseLabel_en-US" xlink:label="lab_arcc_TCIBuyerLLCAndTCIHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TCI Buyer LLC and TCI Holdings, LP</link:label>
    <link:label id="lab_arcc_TCIBuyerLLCAndTCIHoldingsLPMember_label_en-US" xlink:label="lab_arcc_TCIBuyerLLCAndTCIHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TCI Buyer LLC and TCI Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_TCIBuyerLLCAndTCIHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_TCIBuyerLLCAndTCIHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TCI Buyer LLC and TCI Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_TCIBuyerLLCAndTCIHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_TCIBuyerLLCAndTCIHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_TCIBuyerLLCAndTCIHoldingsLPMember" xlink:to="lab_arcc_TCIBuyerLLCAndTCIHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_July2038ClassA2RCLONotesMember_01a07fe8-002f-76f6-9151-3ac3a9ed2d64_terseLabel_en-US" xlink:label="lab_arcc_July2038ClassA2RCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 2038 Class A-2-R CLO Notes</link:label>
    <link:label id="lab_arcc_July2038ClassA2RCLONotesMember_label_en-US" xlink:label="lab_arcc_July2038ClassA2RCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">July 2038 Class A-2-R CLO Notes [Member]</link:label>
    <link:label id="lab_arcc_July2038ClassA2RCLONotesMember_documentation_en-US" xlink:label="lab_arcc_July2038ClassA2RCLONotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">July 2038 Class A-2-R CLO Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_July2038ClassA2RCLONotesMember" xlink:href="arcc-20260930.xsd#arcc_July2038ClassA2RCLONotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_July2038ClassA2RCLONotesMember" xlink:to="lab_arcc_July2038ClassA2RCLONotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementOfCashFlowsAbstract_label_en-US" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Cash Flows [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfCashFlowsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract" xlink:to="lab_us-gaap_StatementOfCashFlowsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember_019fed4d-3dd3-7006-9edd-202b6f964b4e_terseLabel_en-US" xlink:label="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pritchard Industries, LLC and LJ Pritchard TopCo Holdings, LLC</link:label>
    <link:label id="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pritchard Industries, LLC and LJ Pritchard TopCo Holdings, LLC [Member]</link:label>
    <link:label id="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pritchard Industries, LLC and LJ Pritchard TopCo Holdings, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember" xlink:to="lab_arcc_PritchardIndustriesLLCAndLJPritchardTopCoHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InterestExpenseGainLossHedgingInstruments_019fed4d-3e56-79d5-b2e0-6af11a0228a1_terseLabel_en-US" xlink:label="lab_arcc_InterestExpenseGainLossHedgingInstruments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net gain on interest rate swaps accounted for as hedge instruments and the related hedged items</link:label>
    <link:label id="lab_arcc_InterestExpenseGainLossHedgingInstruments_label_en-US" xlink:label="lab_arcc_InterestExpenseGainLossHedgingInstruments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense, Gain (Loss), Hedging Instruments</link:label>
    <link:label id="lab_arcc_InterestExpenseGainLossHedgingInstruments_documentation_en-US" xlink:label="lab_arcc_InterestExpenseGainLossHedgingInstruments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Expense, Gain (Loss), Hedging Instruments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestExpenseGainLossHedgingInstruments" xlink:href="arcc-20260930.xsd#arcc_InterestExpenseGainLossHedgingInstruments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InterestExpenseGainLossHedgingInstruments" xlink:to="lab_arcc_InterestExpenseGainLossHedgingInstruments" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GHXUltimateParentCorporationAndNexusTopCoLPMember_01a15a02-f922-792c-aebb-a9c61506e066_terseLabel_en-US" xlink:label="lab_arcc_GHXUltimateParentCorporationAndNexusTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GHX Ultimate Parent Corporation and Nexus TopCo LP</link:label>
    <link:label id="lab_arcc_GHXUltimateParentCorporationAndNexusTopCoLPMember_label_en-US" xlink:label="lab_arcc_GHXUltimateParentCorporationAndNexusTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GHX Ultimate Parent Corporation and Nexus TopCo LP [Member]</link:label>
    <link:label id="lab_arcc_GHXUltimateParentCorporationAndNexusTopCoLPMember_documentation_en-US" xlink:label="lab_arcc_GHXUltimateParentCorporationAndNexusTopCoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GHX Ultimate Parent Corporation and Nexus TopCo LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GHXUltimateParentCorporationAndNexusTopCoLPMember" xlink:href="arcc-20260930.xsd#arcc_GHXUltimateParentCorporationAndNexusTopCoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GHXUltimateParentCorporationAndNexusTopCoLPMember" xlink:to="lab_arcc_GHXUltimateParentCorporationAndNexusTopCoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ForeignExchangeForwardMember_019fed4d-3d41-7d78-8eb3-a63003513b8a_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignExchangeForwardMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract</link:label>
    <link:label id="lab_us-gaap_ForeignExchangeForwardMember_label_en-US" xlink:label="lab_us-gaap_ForeignExchangeForwardMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Exchange Forward [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ForeignExchangeForwardMember" xlink:to="lab_us-gaap_ForeignExchangeForwardMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MidwestRegionMember_019fed4d-3e56-712d-a97a-8a4c3610d5a5_terseLabel_en-US" xlink:label="lab_us-gaap_MidwestRegionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Midwest</link:label>
    <link:label id="lab_us-gaap_MidwestRegionMember_label_en-US" xlink:label="lab_us-gaap_MidwestRegionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Midwest Region [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MidwestRegionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MidwestRegionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MidwestRegionMember" xlink:to="lab_us-gaap_MidwestRegionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_DataCentersSectorMember_019fed4d-3d41-7ad4-b2b2-8b4977fb8f01_terseLabel_en-US" xlink:label="lab_arcc_DataCentersSectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Data Centers</link:label>
    <link:label id="lab_arcc_DataCentersSectorMember_label_en-US" xlink:label="lab_arcc_DataCentersSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Data Centers Sector [Member]</link:label>
    <link:label id="lab_arcc_DataCentersSectorMember_documentation_en-US" xlink:label="lab_arcc_DataCentersSectorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Data Centers Sector</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_DataCentersSectorMember" xlink:href="arcc-20260930.xsd#arcc_DataCentersSectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_DataCentersSectorMember" xlink:to="lab_arcc_DataCentersSectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue_019fed4d-3d42-7ad8-ac90-c3749c6f64ee_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans on non-accrual status, as a percent of total investments at fair value</link:label>
    <link:label id="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue_label_en-US" xlink:label="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Non-Accrual Status, Percent of Fair Value</link:label>
    <link:label id="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Non-Accrual Status, Percent of Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue" xlink:href="arcc-20260930.xsd#arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue" xlink:to="lab_arcc_InvestmentOwnedNonAccrualStatusPercentOfFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember_019fed4d-3dd3-76e8-88b0-9dbb5992577d_terseLabel_en-US" xlink:label="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mimecast Borrowerco, Inc. and Magnesium Co-Invest SCSp</link:label>
    <link:label id="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember_label_en-US" xlink:label="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mimecast Borrowerco, Inc. and Magnesium Co-Invest SCSp [Member]</link:label>
    <link:label id="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember_documentation_en-US" xlink:label="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mimecast Borrowerco, Inc. and Magnesium Co-Invest SCSp</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember" xlink:href="arcc-20260930.xsd#arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember" xlink:to="lab_arcc_MimecastBorrowercoIncAndMagnesiumCoInvestSCSpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrSecuritiesAggAvailAmt_terseLabel_en-US" xlink:label="lab_ecd_TrdArrSecuritiesAggAvailAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Available</link:label>
    <link:label id="lab_ecd_TrdArrSecuritiesAggAvailAmt_label_en-US" xlink:label="lab_ecd_TrdArrSecuritiesAggAvailAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement, Securities Aggregate Available Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrSecuritiesAggAvailAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrSecuritiesAggAvailAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrSecuritiesAggAvailAmt" xlink:to="lab_ecd_TrdArrSecuritiesAggAvailAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentPolicyTextBlock_019fed4d-3e56-74a3-9aad-99c11dbc9ff8_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments</link:label>
    <link:label id="lab_us-gaap_InvestmentPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_InvestmentPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentPolicyTextBlock" xlink:to="lab_us-gaap_InvestmentPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GAPCOAIVInterholdcoCPL.P.Member_019fed4d-3e56-741d-bbc6-60a19409d061_terseLabel_en-US" xlink:label="lab_arcc_GAPCOAIVInterholdcoCPL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GAPCO AIV Interholdco (CP), L.P.</link:label>
    <link:label id="lab_arcc_GAPCOAIVInterholdcoCPL.P.Member_label_en-US" xlink:label="lab_arcc_GAPCOAIVInterholdcoCPL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GAPCO AIV Interholdco (CP), L.P. [Member]</link:label>
    <link:label id="lab_arcc_GAPCOAIVInterholdcoCPL.P.Member_documentation_en-US" xlink:label="lab_arcc_GAPCOAIVInterholdcoCPL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GAPCO AIV Interholdco (CP), L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GAPCOAIVInterholdcoCPL.P.Member" xlink:href="arcc-20260930.xsd#arcc_GAPCOAIVInterholdcoCPL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GAPCOAIVInterholdcoCPL.P.Member" xlink:to="lab_arcc_GAPCOAIVInterholdcoCPL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember_019fed4d-3e56-72ec-9004-a1ff53418eb3_terseLabel_en-US" xlink:label="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Modigent, LLC and OMERS PMC Investment Holdings LLC</link:label>
    <link:label id="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember_label_en-US" xlink:label="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Modigent, LLC and OMERS PMC Investment Holdings LLC [Member]</link:label>
    <link:label id="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember_documentation_en-US" xlink:label="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Modigent, LLC and OMERS PMC Investment Holdings LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:href="arcc-20260930.xsd#arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:to="lab_arcc_ModigentLLCAndOMERSPMCInvestmentHoldingsLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PvpTable_terseLabel_en-US" xlink:label="lab_ecd_PvpTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pay vs Performance Disclosure</link:label>
    <link:label id="lab_ecd_PvpTable_label_en-US" xlink:label="lab_ecd_PvpTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pay vs Performance Disclosure [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PvpTable" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PvpTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PvpTable" xlink:to="lab_ecd_PvpTable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ApexCleanEnergyTopCoLLCMember_019fed4d-3d42-73c1-8c70-c518f462fdb3_terseLabel_en-US" xlink:label="lab_arcc_ApexCleanEnergyTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Apex Clean Energy TopCo, LLC</link:label>
    <link:label id="lab_arcc_ApexCleanEnergyTopCoLLCMember_label_en-US" xlink:label="lab_arcc_ApexCleanEnergyTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Apex Clean Energy TopCo, LLC [Member]</link:label>
    <link:label id="lab_arcc_ApexCleanEnergyTopCoLLCMember_documentation_en-US" xlink:label="lab_arcc_ApexCleanEnergyTopCoLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Apex Clean Energy TopCo, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ApexCleanEnergyTopCoLLCMember" xlink:href="arcc-20260930.xsd#arcc_ApexCleanEnergyTopCoLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ApexCleanEnergyTopCoLLCMember" xlink:to="lab_arcc_ApexCleanEnergyTopCoLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GainLossOnSaleOfDerivatives_019fed4d-3e56-7e3e-ac3f-657421e540b9_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfDerivatives" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized gains (losses) from foreign currency and other transactions</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfDerivatives_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfDerivatives" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Sale of Derivatives</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfDerivatives" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfDerivatives"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfDerivatives" xlink:to="lab_us-gaap_GainLossOnSaleOfDerivatives" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialHighlightsTable_019fed4d-3dd3-7eff-879a-ea39e9482ed3_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Highlights [Table]</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyFinancialHighlightsTable_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Financial Highlights [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:to="lab_us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFilerCategory_019fed4d-3dd3-785d-994b-4dfe9bec81ad_terseLabel_en-US" xlink:label="lab_dei_EntityFilerCategory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Filer Category</link:label>
    <link:label id="lab_dei_EntityFilerCategory_label_en-US" xlink:label="lab_dei_EntityFilerCategory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Filer Category</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFilerCategory" xlink:to="lab_dei_EntityFilerCategory" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BalrogAcquisitionInc.BalrogTopcoInc.AndBalrogParentL.P.Member_019fed4d-3e56-77d7-a8b4-b4ec45215fe7_terseLabel_en-US" xlink:label="lab_arcc_BalrogAcquisitionInc.BalrogTopcoInc.AndBalrogParentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balrog Acquisition, Inc., Balrog Topco, Inc. and Balrog Parent, L.P.</link:label>
    <link:label id="lab_arcc_BalrogAcquisitionInc.BalrogTopcoInc.AndBalrogParentL.P.Member_label_en-US" xlink:label="lab_arcc_BalrogAcquisitionInc.BalrogTopcoInc.AndBalrogParentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Balrog Acquisition, Inc., Balrog Topco, Inc. and Balrog Parent, L.P. [Member]</link:label>
    <link:label id="lab_arcc_BalrogAcquisitionInc.BalrogTopcoInc.AndBalrogParentL.P.Member_documentation_en-US" xlink:label="lab_arcc_BalrogAcquisitionInc.BalrogTopcoInc.AndBalrogParentL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Balrog Acquisition, Inc., Balrog Topco, Inc. and Balrog Parent, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BalrogAcquisitionInc.BalrogTopcoInc.AndBalrogParentL.P.Member" xlink:href="arcc-20260930.xsd#arcc_BalrogAcquisitionInc.BalrogTopcoInc.AndBalrogParentL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BalrogAcquisitionInc.BalrogTopcoInc.AndBalrogParentL.P.Member" xlink:to="lab_arcc_BalrogAcquisitionInc.BalrogTopcoInc.AndBalrogParentL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsAxis_019fed4d-3dd3-79ba-9d75-7fbf04afd230_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends [Axis]</link:label>
    <link:label id="lab_us-gaap_DividendsAxis_label_en-US" xlink:label="lab_us-gaap_DividendsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsAxis" xlink:to="lab_us-gaap_DividendsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PelicanProductsIncMember_019fed4d-3dd3-76f1-99ed-ab9342863d34_terseLabel_en-US" xlink:label="lab_arcc_PelicanProductsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pelican Products, Inc.</link:label>
    <link:label id="lab_arcc_PelicanProductsIncMember_label_en-US" xlink:label="lab_arcc_PelicanProductsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pelican Products, Inc. [Member]</link:label>
    <link:label id="lab_arcc_PelicanProductsIncMember_documentation_en-US" xlink:label="lab_arcc_PelicanProductsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pelican Products, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PelicanProductsIncMember" xlink:href="arcc-20260930.xsd#arcc_PelicanProductsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PelicanProductsIncMember" xlink:to="lab_arcc_PelicanProductsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InterestAndFacilityFeesPayable_019fed4d-3d42-79fa-9395-f9ad59da4113_terseLabel_en-US" xlink:label="lab_arcc_InterestAndFacilityFeesPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest and facility fees payable</link:label>
    <link:label id="lab_arcc_InterestAndFacilityFeesPayable_label_en-US" xlink:label="lab_arcc_InterestAndFacilityFeesPayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest And Facility Fees Payable</link:label>
    <link:label id="lab_arcc_InterestAndFacilityFeesPayable_documentation_en-US" xlink:label="lab_arcc_InterestAndFacilityFeesPayable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest And Facility Fees Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InterestAndFacilityFeesPayable" xlink:href="arcc-20260930.xsd#arcc_InterestAndFacilityFeesPayable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InterestAndFacilityFeesPayable" xlink:to="lab_arcc_InterestAndFacilityFeesPayable" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_BurgessPointPurchaserCorporationMember_019fed4d-3dd3-79d9-aba6-cc93767998e7_terseLabel_en-US" xlink:label="lab_arcc_BurgessPointPurchaserCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Burgess Point Purchaser Corporation</link:label>
    <link:label id="lab_arcc_BurgessPointPurchaserCorporationMember_label_en-US" xlink:label="lab_arcc_BurgessPointPurchaserCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Burgess Point Purchaser Corporation [Member]</link:label>
    <link:label id="lab_arcc_BurgessPointPurchaserCorporationMember_documentation_en-US" xlink:label="lab_arcc_BurgessPointPurchaserCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Burgess Point Purchaser Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_BurgessPointPurchaserCorporationMember" xlink:href="arcc-20260930.xsd#arcc_BurgessPointPurchaserCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_BurgessPointPurchaserCorporationMember" xlink:to="lab_arcc_BurgessPointPurchaserCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member_019fed4d-3dd3-7ea1-9734-b8cc04f87214_terseLabel_en-US" xlink:label="lab_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sunvair Aerospace Group, Inc. and GB Helios Holdings, L.P.</link:label>
    <link:label id="lab_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member_label_en-US" xlink:label="lab_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sunvair Aerospace Group, Inc. and GB Helios Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member_documentation_en-US" xlink:label="lab_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sunvair Aerospace Group, Inc. and GB Helios Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member" xlink:href="arcc-20260930.xsd#arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member" xlink:to="lab_arcc_SunvairAerospaceGroupInc.AndGBHeliosHoldingsL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember_019fed4d-3dd3-7db8-9962-3405026f682f_terseLabel_en-US" xlink:label="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility</link:label>
    <link:label id="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember_label_en-US" xlink:label="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Secured Revolving Credit Facility [Member]</link:label>
    <link:label id="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember_documentation_en-US" xlink:label="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Senior Secured Revolving Credit Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:href="arcc-20260930.xsd#arcc_SeniorSecuredRevolvingCreditFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:to="lab_arcc_SeniorSecuredRevolvingCreditFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskBenchmarkDomain_019fed4d-3dd3-778a-80de-52b2bb536ab7_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskBenchmarkDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk Benchmark [Domain]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskBenchmarkDomain_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskBenchmarkDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Benchmark [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain" xlink:to="lab_us-gaap_ConcentrationRiskBenchmarkDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_label_en-US" xlink:label="lab_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments, Debt and Equity Securities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:to="lab_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetInvestmentIncomeAbstract_019fed4d-3dd3-77b6-afd9-8c9b752faa15_terseLabel_en-US" xlink:label="lab_us-gaap_NetInvestmentIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">INVESTMENT INCOME:</link:label>
    <link:label id="lab_us-gaap_NetInvestmentIncomeAbstract_label_en-US" xlink:label="lab_us-gaap_NetInvestmentIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Investment Income [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncomeAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentIncomeAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetInvestmentIncomeAbstract" xlink:to="lab_us-gaap_NetInvestmentIncomeAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine2_019fed4d-3d42-7961-bfef-542eec50784e_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line Two</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine2_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine2"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine2" xlink:to="lab_dei_EntityAddressAddressLine2" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList_019fed4d-3dd3-7834-affa-1aeec8a2ef18_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
    <link:label id="lab_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList_label_en-US" xlink:label="lab_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList" xlink:to="lab_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProfitLoss_019fed4d-3d41-7758-9551-693c4ba57f47_totalLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net income (loss)</link:label>
    <link:label id="lab_us-gaap_ProfitLoss_label_en-US" xlink:label="lab_us-gaap_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfitLoss" xlink:to="lab_us-gaap_ProfitLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BusinessAcquisitionSharePrice_01a17ad2-3371-7e73-8dc1-41362dfe569e_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionSharePrice" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Implied value (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionSharePrice_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionSharePrice" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Price Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionSharePrice" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionSharePrice"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionSharePrice" xlink:to="lab_us-gaap_BusinessAcquisitionSharePrice" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GrossInvestmentIncomeOperating_019fed4d-3e56-7b6e-ab80-764de72f759c_totalLabel_en-US" xlink:label="lab_us-gaap_GrossInvestmentIncomeOperating" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total investment income</link:label>
    <link:label id="lab_us-gaap_GrossInvestmentIncomeOperating_label_en-US" xlink:label="lab_us-gaap_GrossInvestmentIncomeOperating" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gross Investment Income, Operating</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossInvestmentIncomeOperating" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossInvestmentIncomeOperating"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GrossInvestmentIncomeOperating" xlink:to="lab_us-gaap_GrossInvestmentIncomeOperating" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember_019fed4d-3dd3-7898-8dd7-9f487ef5c995_terseLabel_en-US" xlink:label="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Metatiedot Bidco OY and Metatiedot US, LLC</link:label>
    <link:label id="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember_label_en-US" xlink:label="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Metatiedot Bidco OY and Metatiedot US, LLC [Member]</link:label>
    <link:label id="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember_documentation_en-US" xlink:label="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Metatiedot Bidco OY and Metatiedot US, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:href="arcc-20260930.xsd#arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:to="lab_arcc_MetatiedotBidcoOYAndMetatiedotUSLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus_019fed4d-3dd3-7766-9790-e643e693f87f_terseLabel_en-US" xlink:label="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of loans on non-accrual status</link:label>
    <link:label id="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus_label_en-US" xlink:label="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Owned, Number Of Loans On Non-Accrual Status</link:label>
    <link:label id="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus_documentation_en-US" xlink:label="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment Owned, Number Of Loans On Non-Accrual Status</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:href="arcc-20260930.xsd#arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:to="lab_arcc_InvestmentOwnedNumberOfLoansOnNonAccrualStatus" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PetVetCareCentersLLCMember_019fed4d-3dd3-73d6-9b39-b27e2833786f_terseLabel_en-US" xlink:label="lab_arcc_PetVetCareCentersLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PetVet Care Centers, LLC</link:label>
    <link:label id="lab_arcc_PetVetCareCentersLLCMember_label_en-US" xlink:label="lab_arcc_PetVetCareCentersLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PetVet Care Centers, LLC [Member]</link:label>
    <link:label id="lab_arcc_PetVetCareCentersLLCMember_documentation_en-US" xlink:label="lab_arcc_PetVetCareCentersLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PetVet Care Centers, LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PetVetCareCentersLLCMember" xlink:href="arcc-20260930.xsd#arcc_PetVetCareCentersLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PetVetCareCentersLLCMember" xlink:to="lab_arcc_PetVetCareCentersLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_PCMIParentLLCAndPCMIUltimateHoldingsLPMember_019fed4d-3d42-7065-8529-9968838be261_terseLabel_en-US" xlink:label="lab_arcc_PCMIParentLLCAndPCMIUltimateHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PCMI Parent, LLC and PCMI Ultimate Holdings, LP</link:label>
    <link:label id="lab_arcc_PCMIParentLLCAndPCMIUltimateHoldingsLPMember_label_en-US" xlink:label="lab_arcc_PCMIParentLLCAndPCMIUltimateHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PCMI Parent, LLC and PCMI Ultimate Holdings, LP [Member]</link:label>
    <link:label id="lab_arcc_PCMIParentLLCAndPCMIUltimateHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_PCMIParentLLCAndPCMIUltimateHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PCMI Parent, LLC and PCMI Ultimate Holdings, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_PCMIParentLLCAndPCMIUltimateHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_PCMIParentLLCAndPCMIUltimateHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_PCMIParentLLCAndPCMIUltimateHoldingsLPMember" xlink:to="lab_arcc_PCMIParentLLCAndPCMIUltimateHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeLiabilities_019fed4d-3e56-7b37-91eb-74ff5020ef36_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative liabilities</link:label>
    <link:label id="lab_us-gaap_DerivativeLiabilities_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilities" xlink:to="lab_us-gaap_DerivativeLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_January2038ClassA1CLONotesMember_019fed4d-3dd3-7cd0-83f3-ebda1e690dde_terseLabel_en-US" xlink:label="lab_arcc_January2038ClassA1CLONotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">January 2038 Class A-1 CLO Notes</link:label>
    <link:label id="lab_arcc_January2038ClassA1CLONotesMember_label_en-US" xlink:label="lab_arcc_January2038ClassA1CLONotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">January 2038 Class A-1 CLO Notes [Member]</link:label>
    <link:label id="lab_arcc_January2038ClassA1CLONotesMember_documentation_en-US" xlink:label="lab_arcc_January2038ClassA1CLONotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">January 2038 Class A-1 CLO Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_January2038ClassA1CLONotesMember" xlink:href="arcc-20260930.xsd#arcc_January2038ClassA1CLONotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_January2038ClassA1CLONotesMember" xlink:to="lab_arcc_January2038ClassA1CLONotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SeniorNotesMember_019fed4d-3d42-7653-a4b5-d02595a8fd93_terseLabel_en-US" xlink:label="lab_us-gaap_SeniorNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Notes</link:label>
    <link:label id="lab_us-gaap_SeniorNotesMember_label_en-US" xlink:label="lab_us-gaap_SeniorNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Notes [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeniorNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SeniorNotesMember" xlink:to="lab_us-gaap_SeniorNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_019fed4d-3d42-7ed3-b4cf-7387cdb712a6_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign Currency Translation</link:label>
    <link:label id="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Transactions and Translations Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:to="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine1_019fed4d-3d41-7ed2-b4bf-5fe6681227ec_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine1_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine1" xlink:to="lab_dei_EntityAddressAddressLine1" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AerinMedicalInc.Member_019fed4d-3e56-7ce3-b819-16da84283233_terseLabel_en-US" xlink:label="lab_arcc_AerinMedicalInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aerin Medical Inc.</link:label>
    <link:label id="lab_arcc_AerinMedicalInc.Member_label_en-US" xlink:label="lab_arcc_AerinMedicalInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aerin Medical Inc. [Member]</link:label>
    <link:label id="lab_arcc_AerinMedicalInc.Member_documentation_en-US" xlink:label="lab_arcc_AerinMedicalInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Aerin Medical Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AerinMedicalInc.Member" xlink:href="arcc-20260930.xsd#arcc_AerinMedicalInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AerinMedicalInc.Member" xlink:to="lab_arcc_AerinMedicalInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeVariableInterestRate_01a169db-d1ea-7a67-a285-d0b62bbed2db_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeVariableInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Coupon</link:label>
    <link:label id="lab_us-gaap_DerivativeVariableInterestRate_label_en-US" xlink:label="lab_us-gaap_DerivativeVariableInterestRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Variable Interest Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeVariableInterestRate" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeVariableInterestRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeVariableInterestRate" xlink:to="lab_us-gaap_DerivativeVariableInterestRate" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_HuFriedyGroupAcquisitionLLCMember_019fed4d-3dd3-76c9-abd2-1dd8d7a78bf1_terseLabel_en-US" xlink:label="lab_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HuFriedy Group Acquisition LLC</link:label>
    <link:label id="lab_arcc_HuFriedyGroupAcquisitionLLCMember_label_en-US" xlink:label="lab_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HuFriedy Group Acquisition LLC [Member]</link:label>
    <link:label id="lab_arcc_HuFriedyGroupAcquisitionLLCMember_documentation_en-US" xlink:label="lab_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">HuFriedy Group Acquisition LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:href="arcc-20260930.xsd#arcc_HuFriedyGroupAcquisitionLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:to="lab_arcc_HuFriedyGroupAcquisitionLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNZD1Member_019fed4d-3dd3-7b2a-82eb-6a03b853be83_terseLabel_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNZD1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency forward contract, NZD 1</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNZD1Member_label_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNZD1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, NZD 1 [Member]</link:label>
    <link:label id="lab_arcc_ForeignCurrencyForwardContractNZD1Member_documentation_en-US" xlink:label="lab_arcc_ForeignCurrencyForwardContractNZD1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign Currency Forward Contract, NZD 1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_ForeignCurrencyForwardContractNZD1Member" xlink:href="arcc-20260930.xsd#arcc_ForeignCurrencyForwardContractNZD1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_ForeignCurrencyForwardContractNZD1Member" xlink:to="lab_arcc_ForeignCurrencyForwardContractNZD1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConsolidationPolicyTextBlock_019fed4d-3e56-7686-9dfd-4429812db817_terseLabel_en-US" xlink:label="lab_us-gaap_ConsolidationPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidation</link:label>
    <link:label id="lab_us-gaap_ConsolidationPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_ConsolidationPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConsolidationPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConsolidationPolicyTextBlock" xlink:to="lab_us-gaap_ConsolidationPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentCompanyPortfolioTurnover_019fed4d-3e56-7c94-8635-c21d7da9cc79_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentCompanyPortfolioTurnover" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Portfolio turnover rate</link:label>
    <link:label id="lab_us-gaap_InvestmentCompanyPortfolioTurnover_label_en-US" xlink:label="lab_us-gaap_InvestmentCompanyPortfolioTurnover" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Company, Portfolio Turnover</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyPortfolioTurnover" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentCompanyPortfolioTurnover"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentCompanyPortfolioTurnover" xlink:to="lab_us-gaap_InvestmentCompanyPortfolioTurnover" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember_019fed4d-3dd3-738d-af00-c8ca9c13a076_terseLabel_en-US" xlink:label="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AHR Funding Holdings, Inc. And AHR Parent Holdings, L.P.</link:label>
    <link:label id="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember_label_en-US" xlink:label="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AHR Funding Holdings, Inc. And AHR Parent Holdings, L.P. [Member]</link:label>
    <link:label id="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember_documentation_en-US" xlink:label="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">AHR Funding Holdings, Inc. And AHR Parent Holdings, L.P.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:href="arcc-20260930.xsd#arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:to="lab_arcc_AHRFundingHoldingsIncAndAHRParentHoldingsLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member_019fed4d-3dd3-77bf-987f-a500d6249e11_terseLabel_en-US" xlink:label="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Opal Fuels Intermediate HoldCo LLC, and Opal Fuels Inc. [Member]</link:label>
    <link:label id="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member_label_en-US" xlink:label="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Opal Fuels Intermediate HoldCo LLC, and Opal Fuels Inc. [Member]</link:label>
    <link:label id="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member_documentation_en-US" xlink:label="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Opal Fuels Intermediate HoldCo LLC, and Opal Fuels Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:href="arcc-20260930.xsd#arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:to="lab_arcc_OpalFuelsIntermediateHoldCoLLCAndOpalFuelsInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_SoftwareAndServicesMember_019fed4d-3dd3-71fc-a691-c09cbca01b99_terseLabel_en-US" xlink:label="lab_arcc_SoftwareAndServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Software and Services</link:label>
    <link:label id="lab_arcc_SoftwareAndServicesMember_label_en-US" xlink:label="lab_arcc_SoftwareAndServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Software And Services [Member]</link:label>
    <link:label id="lab_arcc_SoftwareAndServicesMember_documentation_en-US" xlink:label="lab_arcc_SoftwareAndServicesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Software And Services</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_SoftwareAndServicesMember" xlink:href="arcc-20260930.xsd#arcc_SoftwareAndServicesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_SoftwareAndServicesMember" xlink:to="lab_arcc_SoftwareAndServicesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019fed4d-3dd3-7255-9401-f341ba72f1dd_terseLabel_en-US" xlink:label="lab_us-gaap_ValuationTechniqueDiscountedCashFlowMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Discounted cash flow analysis</link:label>
    <link:label id="lab_us-gaap_ValuationTechniqueDiscountedCashFlowMember_label_en-US" xlink:label="lab_us-gaap_ValuationTechniqueDiscountedCashFlowMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Technique, Discounted Cash Flow [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember" xlink:to="lab_us-gaap_ValuationTechniqueDiscountedCashFlowMember" xlink:type="arc" order="1"/>
    <link:label id="lab_arcc_GLPCanadaBidcoInc.GLPUSMidcoInc.AndGLPGroupHoldcoLPMember_01a154c8-6fff-7dab-87ca-b7bd2eb11bfa_terseLabel_en-US" xlink:label="lab_arcc_GLPCanadaBidcoInc.GLPUSMidcoInc.AndGLPGroupHoldcoLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GLP Canada Bidco Inc., GLP US Midco, Inc., and GLP Group Holdco, LP</link:label>
    <link:label id="lab_arcc_GLPCanadaBidcoInc.GLPUSMidcoInc.AndGLPGroupHoldcoLPMember_label_en-US" xlink:label="lab_arcc_GLPCanadaBidcoInc.GLPUSMidcoInc.AndGLPGroupHoldcoLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GLP Canada Bidco Inc., GLP US Midco, Inc., and GLP Group Holdco, LP [Member]</link:label>
    <link:label id="lab_arcc_GLPCanadaBidcoInc.GLPUSMidcoInc.AndGLPGroupHoldcoLPMember_documentation_en-US" xlink:label="lab_arcc_GLPCanadaBidcoInc.GLPUSMidcoInc.AndGLPGroupHoldcoLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GLP Canada Bidco Inc., GLP US Midco, Inc., and GLP Group Holdco, LP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_arcc_GLPCanadaBidcoInc.GLPUSMidcoInc.AndGLPGroupHoldcoLPMember" xlink:href="arcc-20260930.xsd#arcc_GLPCanadaBidcoInc.GLPUSMidcoInc.AndGLPGroupHoldcoLPMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arcc_GLPCanadaBidcoInc.GLPUSMidcoInc.AndGLPGroupHoldcoLPMember" xlink:to="lab_arcc_GLPCanadaBidcoInc.GLPUSMidcoInc.AndGLPGroupHoldcoLPMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementTable_019fed4d-3dd3-75c8-a07d-5a531eb84c01_terseLabel_en-US" xlink:label="lab_us-gaap_StatementTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
    <link:label id="lab_us-gaap_StatementTable_label_en-US" xlink:label="lab_us-gaap_StatementTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
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