000139644012-312024Q2falseP5YP3YP3YP5Y0.67xbrli:sharesiso4217:USDiso4217:USDxbrli:sharesxbrli:puremain:companymain:investmentmain:entitymain:lendermain:agency00013964402024-01-012024-06-3000013964402024-08-080001396440us-gaap:InvestmentAffiliatedIssuerControlledMember2024-06-300001396440us-gaap:InvestmentAffiliatedIssuerControlledMember2023-12-310001396440us-gaap:InvestmentAffiliatedIssuerNoncontrolledMember2024-06-300001396440us-gaap:InvestmentAffiliatedIssuerNoncontrolledMember2023-12-310001396440us-gaap:InvestmentUnaffiliatedIssuerMember2024-06-300001396440us-gaap:InvestmentUnaffiliatedIssuerMember2023-12-3100013964402024-06-3000013964402023-12-310001396440us-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-06-300001396440us-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2023-12-310001396440main:July2026NotesMemberus-gaap:UnsecuredDebtMember2023-12-310001396440main:July2026NotesMemberus-gaap:UnsecuredDebtMember2024-06-300001396440main:March2029NotesMemberus-gaap:UnsecuredDebtMember2024-06-300001396440main:March2029NotesMemberus-gaap:UnsecuredDebtMember2023-12-310001396440main:June2027NotesMemberus-gaap:UnsecuredDebtMember2024-06-300001396440main:June2027NotesMemberus-gaap:UnsecuredDebtMember2023-12-310001396440main:SBICDebenturesMemberus-gaap:UnsecuredDebtMember2024-06-300001396440main:SBICDebenturesMemberus-gaap:UnsecuredDebtMember2023-12-310001396440main:December2025NotesMemberus-gaap:UnsecuredDebtMember2024-06-300001396440main:December2025NotesMemberus-gaap:UnsecuredDebtMember2023-12-310001396440main:May2024NotesMemberus-gaap:UnsecuredDebtMember2023-12-310001396440main:May2024NotesMemberus-gaap:UnsecuredDebtMember2024-06-300001396440us-gaap:InvestmentAffiliatedIssuerControlledMember2024-04-012024-06-300001396440us-gaap:InvestmentAffiliatedIssuerControlledMember2023-04-012023-06-300001396440us-gaap:InvestmentAffiliatedIssuerControlledMember2024-01-012024-06-300001396440us-gaap:InvestmentAffiliatedIssuerControlledMember2023-01-012023-06-300001396440us-gaap:InvestmentAffiliatedIssuerNoncontrolledMember2024-04-012024-06-300001396440us-gaap:InvestmentAffiliatedIssuerNoncontrolledMember2023-04-012023-06-300001396440us-gaap:InvestmentAffiliatedIssuerNoncontrolledMember2024-01-012024-06-300001396440us-gaap:InvestmentAffiliatedIssuerNoncontrolledMember2023-01-012023-06-300001396440us-gaap:InvestmentUnaffiliatedIssuerMember2024-04-012024-06-300001396440us-gaap:InvestmentUnaffiliatedIssuerMember2023-04-012023-06-300001396440us-gaap:InvestmentUnaffiliatedIssuerMember2024-01-012024-06-300001396440us-gaap:InvestmentUnaffiliatedIssuerMember2023-01-012023-06-3000013964402024-04-012024-06-3000013964402023-04-012023-06-3000013964402023-01-012023-06-300001396440us-gaap:CommonStockMember2022-12-310001396440us-gaap:AdditionalPaidInCapitalMember2022-12-310001396440us-gaap:RetainedEarningsMember2022-12-3100013964402022-12-310001396440us-gaap:CommonStockMember2023-01-012023-03-310001396440us-gaap:AdditionalPaidInCapitalMember2023-01-012023-03-3100013964402023-01-012023-03-310001396440us-gaap:RetainedEarningsMember2023-01-012023-03-310001396440us-gaap:CommonStockMember2023-03-310001396440us-gaap:AdditionalPaidInCapitalMember2023-03-310001396440us-gaap:RetainedEarningsMember2023-03-3100013964402023-03-310001396440us-gaap:CommonStockMember2023-04-012023-06-300001396440us-gaap:AdditionalPaidInCapitalMember2023-04-012023-06-300001396440us-gaap:RetainedEarningsMember2023-04-012023-06-300001396440us-gaap:CommonStockMember2023-06-300001396440us-gaap:AdditionalPaidInCapitalMember2023-06-300001396440us-gaap:RetainedEarningsMember2023-06-3000013964402023-06-300001396440us-gaap:CommonStockMember2023-12-310001396440us-gaap:AdditionalPaidInCapitalMember2023-12-310001396440us-gaap:RetainedEarningsMember2023-12-310001396440us-gaap:CommonStockMember2024-01-012024-03-310001396440us-gaap:AdditionalPaidInCapitalMember2024-01-012024-03-3100013964402024-01-012024-03-310001396440us-gaap:RetainedEarningsMember2024-01-012024-03-310001396440us-gaap:CommonStockMember2024-03-310001396440us-gaap:AdditionalPaidInCapitalMember2024-03-310001396440us-gaap:RetainedEarningsMember2024-03-3100013964402024-03-310001396440us-gaap:CommonStockMember2024-04-012024-06-300001396440us-gaap:AdditionalPaidInCapitalMember2024-04-012024-06-300001396440us-gaap:RetainedEarningsMember2024-04-012024-06-300001396440us-gaap:CommonStockMember2024-06-300001396440us-gaap:AdditionalPaidInCapitalMember2024-06-300001396440us-gaap:RetainedEarningsMember2024-06-300001396440main:December2025NotesMember2024-01-012024-06-300001396440main:December2025NotesMember2023-01-012023-06-300001396440main:March2029NotesMember2024-01-012024-06-300001396440main:March2029NotesMember2023-01-012023-06-300001396440main:June2027NotesMember2024-01-012024-06-300001396440main:June2027NotesMember2023-01-012023-06-300001396440main:SBICDebenturesMember2024-01-012024-06-300001396440main:SBICDebenturesMember2023-01-012023-06-300001396440main:May2024NotesMember2024-01-012024-06-300001396440main:May2024NotesMember2023-01-012023-06-300001396440Analytical Systems Keco Holdings, LLC, Secured Debt 12024-06-300001396440Analytical Systems Keco Holdings, LLC, Secured Debt 22024-06-300001396440Analytical Systems Keco Holdings, LLC, Preferred Member Units 12024-06-300001396440Analytical Systems Keco Holdings, LLC, Preferred Member Units 22024-06-300001396440Analytical Systems Keco Holdings, LLC, Warrants2024-06-300001396440main:AnalyticalSystemsKecoHoldingsLLCMember2024-06-300001396440ASC Interests, LLC, Secured Debt 12024-06-300001396440ASC Interests, LLC, Secured Debt 22024-06-300001396440ASC Interests, LLC, Preferred Member Units2024-06-300001396440ASC Interests, LLC, Member Units2024-06-300001396440main:ASCInterestsLLCMember2024-06-300001396440ATS Workholding, LLC, Secured Debt 12024-06-300001396440ATS Workholding, LLC, Secured Debt 22024-06-300001396440ATS Workholding, LLC, Preferred Member Units2024-06-300001396440main:ATSWorkholdingLLCMember2024-06-300001396440Barfly Ventures, LLC, Secured Debt2024-06-300001396440Barfly Ventures, LLC, Member Units2024-06-300001396440main:BarflyVenturesLLCMember2024-06-300001396440Batjer TopCo, LLC, Secured Debt 12024-06-300001396440Batjer TopCo, LLC, Secured Debt 22024-06-300001396440Batjer TopCo, LLC, Secured Debt 32024-06-300001396440Batjer TopCo, LLC, Preferred Stock2024-06-300001396440main:BatjerTopCoLLCMember2024-06-300001396440Bolder Panther Group, LLC, Secured Debt 12024-06-300001396440Bolder Panther Group, LLC, Secured Debt 22024-06-300001396440Bolder Panther Group, LLC, Class B Preferred Member Units2024-06-300001396440main:BolderPantherGroupLLCMember2024-06-300001396440Brewer Crane Holdings, LLC, Secured Debt2024-06-300001396440Brewer Crane Holdings, LLC, Preferred Member Units2024-06-300001396440main:BrewerCraneHoldingsLLCMember2024-06-300001396440Bridge Capital Solutions Corporation, Secured Debt 12024-06-300001396440Bridge Capital Solutions Corporation, Secured Debt 22024-06-300001396440Bridge Capital Solutions Corporation, Warrants2024-06-300001396440Bridge Capital Solutions Corporation, Preferred Member Units2024-06-300001396440main:BridgeCapitalSolutionsCorporationMember2024-06-300001396440Café Brazil, LLC, Member Units2024-06-300001396440California Splendor Holdings LLC, Secured Debt 12024-06-300001396440California Splendor Holdings LLC, Secured Debt 22024-06-300001396440California Splendor Holdings LLC, Preferred Member Units 12024-06-300001396440California Splendor Holdings LLC, Preferred Member Units 22024-06-300001396440main:CaliforniaSplendorHoldingsLLCMember2024-06-300001396440CBT Nuggets, LLC, Member Units2024-06-300001396440Centre Technologies Holdings, LLC, Secured Debt 12024-06-300001396440Centre Technologies Holdings, LLC, Secured Debt 22024-06-300001396440Centre Technologies Holdings, LLC, Preferred Member Units2024-06-300001396440main:CentreTechnologiesHoldingsLLCMember2024-06-300001396440Chamberlin Holding LLC, Secured Debt 12024-06-300001396440Chamberlin Holding LLC, Secured Debt 22024-06-300001396440Chamberlin Holding LLC, Member Units 12024-06-300001396440Chamberlin Holding LLC, Member Units 22024-06-300001396440main:ChamberlinHoldingLLCMember2024-06-300001396440Charps, LLC, Unsecured Debt2024-06-300001396440Charps, LLC, Preferred Member Units2024-06-300001396440main:CharpsLLCMember2024-06-300001396440Clad-Rex Steel, LLC, Secured Debt 12024-06-300001396440Clad-Rex Steel, LLC, Secured Debt 22024-06-300001396440Clad-Rex Steel, LLC, Secured Debt 32024-06-300001396440Clad-Rex Steel, LLC, Member Units 12024-06-300001396440Clad-Rex Steel, LLC, Member Units 22024-06-300001396440main:CladRexSteelLLCMember2024-06-300001396440Cody Pools, Inc., Secured Debt 12024-06-300001396440Cody Pools, Inc., Secured Debt 22024-06-300001396440Cody Pools, Inc., Preferred Member Units2024-06-300001396440main:CodyPoolsIncMember2024-06-300001396440Colonial Electric Company LLC, Secured Debt 12024-06-300001396440Colonial Electric Company LLC, Secured Debt 22024-06-300001396440Colonial Electric Company LLC, Preferred Member Units2024-06-300001396440main:ColonialElectricCompanyLLCMember2024-06-300001396440CompareNetworks Topco, LLC, Secured Debt2024-06-300001396440CompareNetworks Topco, LLC, Preferred Member Units2024-06-300001396440main:CompareNetworksTopcoLLCMember2024-06-300001396440Compass Systems & Sales, LLC, Secured Debt 12024-06-300001396440Compass Systems & Sales, LLC, Secured Debt 22024-06-300001396440Compass Systems & Sales, LLC, Preferred Equity2024-06-300001396440main:CompassSystemsSalesLLCMember2024-06-300001396440Copper Trail Fund Investments, LP Interests (CTMH, LP)2024-06-300001396440Cybermedia Technologies, LLC, Secured Debt 12024-06-300001396440Cybermedia Technologies, LLC, Secured Debt 22024-06-300001396440Cybermedia Technologies, LLC, Preferred Member Units2024-06-300001396440main:CybermediaTechnologiesLLCMember2024-06-300001396440Datacom, LLC, Secured Debt 12024-06-300001396440Datacom, LLC, Secured Debt 22024-06-300001396440Datacom, LLC, Preferred Member Units2024-06-300001396440main:DatacomLLCMember2024-06-300001396440Digital Products Holdings LLC, Secured Debt2024-06-300001396440Digital Products Holdings LLC, Preferred Member Units2024-06-300001396440main:DigitalProductsHoldingsLLCMember2024-06-300001396440Direct Marketing Solutions, Inc., Secured Debt 12024-06-300001396440Direct Marketing Solutions, Inc., Secured Debt 22024-06-300001396440Direct Marketing Solutions, Inc., Preferred Stock2024-06-300001396440main:DirectMarketingSolutionsIncMember2024-06-300001396440Elgin AcquireCo, LLC, Secured Debt 12024-06-300001396440Elgin AcquireCo, LLC, Secured Debt 22024-06-300001396440Elgin AcquireCo, LLC, Secured Debt 32024-06-300001396440Elgin AcquireCo, LLC, Common Stock 12024-06-300001396440Elgin AcquireCo, LLC, Common Stock 22024-06-300001396440main:ElginAcquireCoLLCMember2024-06-300001396440Gamber-Johnson Holdings, LLC, Secured Debt 12024-06-300001396440Gamber-Johnson Holdings, LLC, Secured Debt 22024-06-300001396440Gamber-Johnson Holdings, LLC, Member Units2024-06-300001396440main:GamberJohnsonHoldingsLLCMember2024-06-300001396440Garreco, LLC, Member Units2024-06-300001396440main:GarrecoLLCMember2024-06-300001396440GRT Rubber Technologies LLC, Secured Debt 12024-06-300001396440GRT Rubber Technologies LLC, Secured Debt 22024-06-300001396440GRT Rubber Technologies LLC, Member Units2024-06-300001396440main:GRTRubberTechnologiesLLCMember2024-06-300001396440Gulf Publishing Holdings, LLC, Secured Debt 12024-06-300001396440Gulf Publishing Holdings, LLC, Secured Debt 22024-06-300001396440Gulf Publishing Holdings, LLC, Preferred Equity2024-06-300001396440Gulf Publishing Holdings, LLC, Member Units2024-06-300001396440main:GulfPublishingHoldingsLLCMember2024-06-300001396440Harris Preston Fund Investments, LP Interests (2717 MH, L.P.)2024-06-300001396440Harris Preston Fund Investments, LP Interests (2717 HPP-MS, L.P.)2024-06-300001396440Harris Preston Fund Investments, LP Interests (2717 GRE-LP, L.P.)2024-06-300001396440main:HarrisPrestonFundInvestmentsOneMember2024-06-300001396440Harrison Hydra-Gen, Ltd., Common Stock2024-06-300001396440IG Investor, LLC, Secured Debt 12024-06-300001396440IG Investor, LLC, Secured Debt 22024-06-300001396440IG Investor, LLC, Common Equity2024-06-300001396440main:IGInvestorLLCMember2024-06-300001396440Jensen Jewelers of Idaho, LLC, Secured Debt 12024-06-300001396440Jensen Jewelers of Idaho, LLC, Secured Debt 22024-06-300001396440Jensen Jewelers of Idaho, LLC, Member Units2024-06-300001396440main:JensenJewelersOfIdahoLLCMember2024-06-300001396440JorVet Holdings, LLC, Secured Debt2024-06-300001396440JorVet Holdings, LLC, Preferred Equity2024-06-300001396440main:JorVetHoldingsLLCMember2024-06-300001396440KBK Industries, LLC, Secured Debt2024-06-300001396440KBK Industries, LLC, Member Units2024-06-300001396440main:KBKIndustriesLLCMember2024-06-300001396440Kickhaefer Manufacturing Company, LLC, Secured Debt 12024-06-300001396440Kickhaefer Manufacturing Company, LLC, Secured Debt 22024-06-300001396440Kickhaefer Manufacturing Company, LLC, Preferred Equity2024-06-300001396440Kickhaefer Manufacturing Company, LLC, Member Units2024-06-300001396440main:KickhaeferManufacturingCompanyLLCMember2024-06-300001396440Metalforming Holdings, LLC, Secured Debt 12024-06-300001396440Metalforming Holdings, LLC, Secured Debt 22024-06-300001396440Metalforming Holdings, LLC, Preferred Equity2024-06-300001396440Metalforming Holdings, LLC, Common Stock2024-06-300001396440main:MetalFormingHoldingLLCMember2024-06-300001396440MH Corbin Holding LLC, Secured Debt2024-06-300001396440MH Corbin Holding LLC, Preferred Member Units 12024-06-300001396440MH Corbin Holding LLC, Preferred Member Units 22024-06-300001396440main:MHCorbinHoldingLLCMember2024-06-300001396440MS Private Loan Fund I, LP, Secured Debt2024-06-300001396440MS Private Loan Fund I, LP, LP Interests2024-06-300001396440main:MSPrivateLoanFundILPMember2024-06-300001396440MS Private Loan Fund II, LP, Secured Debt2024-06-300001396440MS Private Loan Fund II, LP, LP Interests2024-06-300001396440main:MSPrivateLoanFundIILPMember2024-06-300001396440MSC Adviser I, LLC, Member Units2024-06-300001396440MSC Income Fund, Inc., Common Equity2024-06-300001396440Mystic Logistics Holdings, LLC, Secured Debt 12024-06-300001396440Mystic Logistics Holdings, LLC, Secured Debt 22024-06-300001396440Mystic Logistics Holdings, LLC, Common Stock2024-06-300001396440main:MysticLogisticsHoldingsLLCMember2024-06-300001396440NAPCO Precast, LLC, Member Units2024-06-300001396440Nello Industries Investco, LLC, Secured Debt 12024-06-300001396440Nello Industries Investco, LLC, Secured Debt 22024-06-300001396440Nello Industries Investco, LLC, Common Equity2024-06-300001396440main:NelloIndustriesInvestcoLLCMember2024-06-300001396440NexRev LLC, Secured Debt 12024-06-300001396440NexRev LLC, Secured Debt 22024-06-300001396440NexRev LLC, Preferred Member Units2024-06-300001396440main:NexRevLLCMember2024-06-300001396440NRP Jones, LLC, Secured Debt2024-06-300001396440NRP Jones, LLC, Member Units 12024-06-300001396440NRP Jones, LLC, Member Units 22024-06-300001396440main:NRPJonesLLCMember2024-06-300001396440NuStep, LLC, Secured Debt 12024-06-300001396440NuStep, LLC, Secured Debt 22024-06-300001396440NuStep, LLC, Preferred Member Units 12024-06-300001396440NuStep, LLC, Preferred Member Units 22024-06-300001396440main:NuStepLLCMember2024-06-300001396440OMi Topco, LLC, Secured Debt2024-06-300001396440OMi Topco, LLC, Preferred Member Units2024-06-300001396440main:OMiTopcoLLCMember2024-06-300001396440Orttech Holdings, LLC, Secured Debt 12024-06-300001396440Orttech Holdings, LLC, Secured Debt 22024-06-300001396440Orttech Holdings, LLC, Preferred Stock2024-06-300001396440main:OrttechHoldingsLLCMember2024-06-300001396440Pearl Meyer Topco LLC, Secured Debt 12024-06-300001396440Pearl Meyer Topco LLC, Secured Debt 22024-06-300001396440Pearl Meyer Topco LLC, Secured Debt 32024-06-300001396440Pearl Meyer Topco LLC, Preferred Equity2024-06-300001396440main:PearlMeyerTopcoLLCMember2024-06-300001396440Pinnacle TopCo, LLC, Secured Debt 12024-06-300001396440Pinnacle TopCo, LLC, Secured Debt 22024-06-300001396440Pinnacle TopCo, LLC, Preferred Equity2024-06-300001396440main:PinnacleTopCoLLCMember2024-06-300001396440PPL RVs, Inc., Secured Debt 12024-06-300001396440PPL RVs, Inc., Secured Debt 22024-06-300001396440PPL RVs, Inc., Common Stock 12024-06-300001396440PPL RVs, Inc., Common Stock 22024-06-300001396440main:PPLRVsIncMember2024-06-300001396440Principle Environmental, LLC, Secured Debt2024-06-300001396440Principle Environmental, LLC, Preferred Member Units2024-06-300001396440Principle Environmental, LLC, Common Stock2024-06-300001396440main:PrincipleEnvironmentalLLCMember2024-06-300001396440Quality Lease Service, LLC, Member Units2024-06-300001396440River Aggregates, LLC, Member Units2024-06-300001396440Robbins Bros. Jewelry, Inc., Secured Debt 12024-06-300001396440Robbins Bros. Jewelry, Inc., Secured Debt 22024-06-300001396440Robbins Bros. Jewelry, Inc., Preferred Equity2024-06-300001396440main:RobbinsBrosJewelryIncMember2024-06-300001396440Tedder Industries, LLC, Secured Debt 12024-06-300001396440Tedder Industries, LLC, Secured Debt 22024-06-300001396440Tedder Industries, LLC, Preferred Member Units 12024-06-300001396440Tedder Industries, LLC, Preferred Member Units 22024-06-300001396440Tedder Industries, LLC, Preferred Member Units 32024-06-300001396440main:TedderIndustriesLLCMember2024-06-300001396440Televerde, LLC, Preferred Stock2024-06-300001396440Televerde, LLC, Member Units2024-06-300001396440main:TeleverdeLLCMember2024-06-300001396440Trantech Radiator Topco, LLC, Secured Debt 12024-06-300001396440Trantech Radiator Topco, LLC, Secured Debt 22024-06-300001396440Trantech Radiator Topco, LLC, Common Stock2024-06-300001396440main:TrantechRadiatorTopcoLLCMember2024-06-300001396440Vision Interests, Inc., Series A Preferred Stock2024-06-300001396440Volusion, LLC, Secured Debt2024-06-300001396440Volusion, LLC, Preferred Member Units 12024-06-300001396440Volusion, LLC, Preferred Member Units 22024-06-300001396440Volusion, LLC, Preferred Member Units 32024-06-300001396440Volusion, LLC, Common Stock2024-06-300001396440main:VolusionLLCMember2024-06-300001396440VVS Holdco LLC, Secured Debt 12024-06-300001396440VVS Holdco LLC, Secured Debt 22024-06-300001396440VVS Holdco LLC, Preferred Equity2024-06-300001396440main:VVSHoldcoLLCMember2024-06-300001396440Ziegler’s NYPD, LLC, Secured Debt 12024-06-300001396440Ziegler’s NYPD, LLC, Secured Debt 22024-06-300001396440Ziegler’s NYPD, LLC, Secured Debt 32024-06-300001396440Ziegler’s NYPD, LLC, Preferred Member Units2024-06-300001396440Ziegler’s NYPD, LLC, Warrants2024-06-300001396440main:ZieglersNYPDLLCMember2024-06-300001396440AAC Holdings, Inc., Secured Debt 12024-06-300001396440AAC Holdings, Inc., Secured Debt 22024-06-300001396440AAC Holdings, Inc., Common Stock2024-06-300001396440AAC Holdings, Inc., Warrants2024-06-300001396440main:AACHoldingsIncMember2024-06-300001396440Boccella Precast Products LLC, Secured Debt2024-06-300001396440Boccella Precast Products LLC, Member Units2024-06-300001396440main:BoccellaPrecastProductsLLCMember2024-06-300001396440Buca C, LLC, Secured Debt 12024-06-300001396440Buca C, LLC, Secured Debt 22024-06-300001396440Buca C, LLC, Preferred Member Units2024-06-300001396440main:BucaCLLCMember2024-06-300001396440Career Team Holdings, LLC, Secured Debt 12024-06-300001396440Career Team Holdings, LLC, Secured Debt 22024-06-300001396440Career Team Holdings, LLC, Common Stock2024-06-300001396440main:CareerTeamHoldingsLLCMember2024-06-300001396440Classic H&G Holdings, LLC, Preferred Member Units2024-06-300001396440Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)2024-06-300001396440DMA Industries, LLC, Secured Debt 12024-06-300001396440DMA Industries, LLC, Secured Debt 22024-06-300001396440DMA Industries, LLC, Preferred Equity2024-06-300001396440main:DMAIndustriesLLCMember2024-06-300001396440Dos Rios Partners, LP Interests (Dos Rios Partners, LP)2024-06-300001396440Dos Rios Partners, LP Interests (Dos Rios Partners - A, LP)2024-06-300001396440main:DosRiosPartnersMember2024-06-300001396440Dos Rios Stone Products LLC, Class A Preferred Units2024-06-300001396440EIG Fund Investments, LP Interests (EIG Global Private Debt Fund-A, L.P.)2024-06-300001396440FCC Intermediate Holdco, LLC (Supplycore), Secured Debt2024-06-300001396440FCC Intermediate Holdco, LLC (Supplycore), Warrants2024-06-300001396440main:FCCIntermediateHoldcoLLCSupplycoreMember2024-06-300001396440Flame King Holdings, LLC, Preferred Equity2024-06-300001396440Freeport Financial Funds, LP Interests (Freeport Financial SBIC Fund LP)2024-06-300001396440Freeport Financial Funds, LP Interests (Freeport First Lien Loan Fund III LP)2024-06-300001396440main:FreeportFinancialFundsMember2024-06-300001396440GFG Group, LLC, Secured Debt2024-06-300001396440GFG Group, LLC, Preferred Member Units2024-06-300001396440main:GFGGroupLLCMember2024-06-300001396440Gulf Manufacturing, LLC, Secured Debt 12024-06-300001396440Gulf Manufacturing, LLC, Secured Debt 22024-06-300001396440Gulf Manufacturing, LLC, Member Units2024-06-300001396440main:GulfManufacturingLLCMember2024-06-300001396440Harris Preston Fund Investments, LP Interests (HPEP 3, L.P.)2024-06-300001396440Harris Preston Fund Investments, LP Interests (HPEP 4, L.P.)2024-06-300001396440Harris Preston Fund Investments, LP Interests (423 COR, L.P.)2024-06-300001396440Harris Preston Fund Investments, LP Interests (423 HAR, L.P.)2024-06-300001396440main:HarrisPrestonFundInvestmentsTwoMember2024-06-300001396440Hawk Ridge Systems, LLC, Secured Debt 12024-06-300001396440Hawk Ridge Systems, LLC, Secured Debt 22024-06-300001396440Hawk Ridge Systems, LLC, Preferred Member Units 12024-06-300001396440Hawk Ridge Systems, LLC, Preferred Member Units 22024-06-300001396440main:HawkRidgeSystemsLLCMember2024-06-300001396440Houston Plating and Coatings, LLC, Unsecured Convertible Debt2024-06-300001396440Houston Plating and Coatings, LLC, Member Units2024-06-300001396440main:HoustonPlatingAndCoatingsLLCMember2024-06-300001396440Independent Pet Partners Intermediate Holdings, LLC, Common Equity2024-06-300001396440Infinity X1 Holdings, LLC, Secured Debt2024-06-300001396440Infinity X1 Holdings, LLC, Preferred Equity2024-06-300001396440main:InfinityX1HoldingsLLCMember2024-06-300001396440Integral Energy Services, Secured Debt2024-06-300001396440Integral Energy Services, Preferred Equity2024-06-300001396440Integral Energy Services, Common Stock2024-06-300001396440main:IntegralEnergyServicesMember2024-06-300001396440Iron-Main Investments, LLC, Secured Debt 12024-06-300001396440Iron-Main Investments, LLC, Secured Debt 22024-06-300001396440Iron-Main Investments, LLC, Secured Debt 32024-06-300001396440Iron-Main Investments, LLC, Secured Debt 42024-06-300001396440Iron-Main Investments, LLC, Secured Debt 52024-06-300001396440Iron-Main Investments, LLC, Preferred Equity2024-06-300001396440Iron-Main Investments, LLC, Common Stock2024-06-300001396440main:IronMainInvestmentsLLCMember2024-06-300001396440ITA Holdings Group, LLC, Secured Debt 12024-06-300001396440ITA Holdings Group, LLC, Secured Debt 22024-06-300001396440ITA Holdings Group, LLC, Secured Debt 32024-06-300001396440ITA Holdings Group, LLC, Secured Debt 42024-06-300001396440ITA Holdings Group, LLC, Warrants2024-06-300001396440main:ITAHoldingsGroupLLCMember2024-06-300001396440Johnson Downie Opco, LLC, Secured Debt 12024-06-300001396440Johnson Downie Opco, LLC, Secured Debt 22024-06-300001396440Johnson Downie Opco, LLC, Preferred Equity2024-06-300001396440main:JohnsonDownieOpcoLLCMember2024-06-300001396440Nebraska Vet AcquireCo, LLC, Secured Debt 12024-06-300001396440Nebraska Vet AcquireCo, LLC, Secured Debt 22024-06-300001396440Nebraska Vet AcquireCo, LLC, Secured Debt 32024-06-300001396440Nebraska Vet AcquireCo, LLC, Preferred Member Units2024-06-300001396440main:NebraskaVetAcquireCoLLCMember2024-06-300001396440OnAsset Intelligence, Inc., Secured Debt 12024-06-300001396440OnAsset Intelligence, Inc., Secured Debt 22024-06-300001396440OnAsset Intelligence, Inc., Secured Debt 32024-06-300001396440OnAsset Intelligence, Inc., Secured Debt 42024-06-300001396440OnAsset Intelligence, Inc., Unsecured Debt2024-06-300001396440OnAsset Intelligence, Inc., Preferred Stock2024-06-300001396440OnAsset Intelligence, Inc., Common Stock2024-06-300001396440OnAsset Intelligence, Inc., Warrants2024-06-300001396440main:OnAssetIntelligenceIncMember2024-06-300001396440Oneliance, LLC, Secured Debt2024-06-300001396440Oneliance, LLC, Preferred Stock2024-06-300001396440main:OnelianceLLCMember2024-06-300001396440SI East, LLC, Secured Debt 12024-06-300001396440SI East, LLC, Secured Debt 22024-06-300001396440SI East, LLC, Preferred Member Units2024-06-300001396440main:SIEastLLCMember2024-06-300001396440Slick Innovations, LLC, Secured Debt2024-06-300001396440Slick Innovations, LLC, Common Stock2024-06-300001396440main:SlickInnovationsLLCMember2024-06-300001396440Student Resource Center, LLC, Secured Debt2024-06-300001396440Student Resource Center, LLC, Preferred Equity2024-06-300001396440main:StudentResourceCenterLLCMember2024-06-300001396440Superior Rigging & Erecting Co., Preferred Member Units2024-06-300001396440main:SuperiorRiggingErectingCoMember2024-06-300001396440The Affiliati Network, LLC, Secured Debt 12024-06-300001396440The Affiliati Network, LLC, Secured Debt 22024-06-300001396440The Affiliati Network, LLC, Preferred Stock 12024-06-300001396440The Affiliati Network, LLC, Preferred Stock 22024-06-300001396440main:TheAffiliatiNetworkLLCMember2024-06-300001396440UnionRock Energy Fund II, LP, LP Interests2024-06-300001396440UnionRock Energy Fund III, LP, LP Interests2024-06-300001396440UniTek Global Services, Inc., Secured Convertible Debt 12024-06-300001396440UniTek Global Services, Inc., Secured Convertible Debt 22024-06-300001396440UniTek Global Services, Inc., Preferred Stock 12024-06-300001396440UniTek Global Services, Inc., Preferred Stock 22024-06-300001396440UniTek Global Services, Inc., Preferred Stock 32024-06-300001396440UniTek Global Services, Inc., Preferred Stock 42024-06-300001396440UniTek Global Services, Inc., Common Stock2024-06-300001396440main:UniTekGlobalServicesIncMember2024-06-300001396440Universal Wellhead Services Holdings, LLC, Preferred Member Units2024-06-300001396440Universal Wellhead Services Holdings, LLC, Member Units2024-06-300001396440main:UniversalWellheadServicesHoldingsLLCMember2024-06-300001396440Urgent DSO LLC, Secured Debt2024-06-300001396440Urgent DSO LLC, Preferred Equity2024-06-300001396440main:UrgentDSOLLCMember2024-06-300001396440World Micro Holdings, LLC, Secured Debt2024-06-300001396440World Micro Holdings, LLC, Preferred Equity2024-06-300001396440main:WorldMicroHoldingsLLCMember2024-06-300001396440AB Centers Acquisition Corporation, Secured Debt 12024-06-300001396440AB Centers Acquisition Corporation, Secured Debt 22024-06-300001396440AB Centers Acquisition Corporation, Secured Debt 32024-06-300001396440AB Centers Acquisition Corporation, Secured Debt 42024-06-300001396440main:ABCentersAcquisitionCorporationMember2024-06-300001396440Acumera, Inc., Secured Debt 12024-06-300001396440Acumera, Inc., Secured Debt 22024-06-300001396440Acumera, Inc., Warrants2024-06-300001396440main:AcumeraIncMember2024-06-300001396440Adams Publishing Group, LLC, Secured Debt 12024-06-300001396440Adams Publishing Group, LLC, Secured Debt 22024-06-300001396440main:AdamsPublishingGroupLLCMember2024-06-300001396440ADS Tactical, Inc., Secured Debt2024-06-300001396440AMEREQUIP LLC, Common Stock2024-06-300001396440American Health Staffing Group, Inc., Secured Debt 12024-06-300001396440American Health Staffing Group, Inc., Secured Debt 22024-06-300001396440main:AmericanHealthStaffingGroupIncMember2024-06-300001396440American Nuts, LLC, Secured Debt 12024-06-300001396440American Nuts, LLC, Secured Debt 22024-06-300001396440American Nuts, LLC, Secured Debt 32024-06-300001396440American Nuts, LLC, Secured Debt 42024-06-300001396440main:AmericanNutsLLCMember2024-06-300001396440American Teleconferencing Services, Ltd., Secured Debt 12024-06-300001396440American Teleconferencing Services, Ltd., Secured Debt 22024-06-300001396440main:AmericanTeleconferencingServicesLtdMember2024-06-300001396440ArborWorks, LLC, Secured Debt 12024-06-300001396440ArborWorks, LLC, Secured Debt 22024-06-300001396440ArborWorks, LLC, Preferred Equity 12024-06-300001396440ArborWorks, LLC, Preferred Equity 22024-06-300001396440ArborWorks, LLC, Common Equity2024-06-300001396440main:ArborWorksLLCMember2024-06-300001396440Archer Systems, LLC, Common Stock2024-06-300001396440ATS Operating, LLC, Secured Debt 12024-06-300001396440ATS Operating, LLC, Secured Debt 22024-06-300001396440ATS Operating, LLC, Secured Debt 32024-06-300001396440ATS Operating, LLC, Common Stock2024-06-300001396440main:ATSOperatingLLCMember2024-06-300001396440AVEX Aviation Holdings, LLC, Secured Debt 12024-06-300001396440AVEX Aviation Holdings, LLC, Secured Debt 22024-06-300001396440AVEX Aviation Holdings, LLC, Common Equity2024-06-300001396440main:AVEXAviationHoldingsLLCMember2024-06-300001396440Berry Aviation, Inc., Preferred Member Units 12024-06-300001396440Berry Aviation, Inc., Preferred Member Units 22024-06-300001396440Berry Aviation, Inc., Preferred Member Units 32024-06-300001396440main:BerryAviationIncMember2024-06-300001396440Bettercloud, Inc., Secured Debt 12024-06-300001396440Bettercloud, Inc., Secured Debt 22024-06-300001396440main:BettercloudIncMember2024-06-300001396440Binswanger Enterprises, LLC, Member Units2024-06-300001396440Bluestem Brands, Inc., Secured Debt 12024-06-300001396440Bluestem Brands, Inc., Secured Debt 22024-06-300001396440Bluestem Brands, Inc., Secured Debt 32024-06-300001396440Bluestem Brands, Inc., Common Stock2024-06-300001396440Bluestem Brands, Inc., Warrants2024-06-300001396440main:BluestemBrandsIncMember2024-06-300001396440Bond Brand Loyalty ULC, Secured Debt 12024-06-300001396440Bond Brand Loyalty ULC, Secured Debt 22024-06-300001396440Bond Brand Loyalty ULC, Secured Debt 32024-06-300001396440Bond Brand Loyalty ULC, Preferred Equity2024-06-300001396440Bond Brand Loyalty ULC, Common Equity2024-06-300001396440main:BondBrandLoyaltyULCMember2024-06-300001396440BP Loenbro Holdings Inc., Secured Debt 12024-06-300001396440BP Loenbro Holdings Inc., Secured Debt 22024-06-300001396440BP Loenbro Holdings Inc., Secured Debt 32024-06-300001396440BP Loenbro Holdings Inc., Common Equity2024-06-300001396440main:BPLoenbroHoldingsInc.Member2024-06-300001396440Brainworks Software, LLC, Secured Debt 12024-06-300001396440Brainworks Software, LLC, Secured Debt 22024-06-300001396440main:BrainworksSoftwareLLCMember2024-06-300001396440Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund III, LP)2024-06-300001396440Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund IV, LP)2024-06-300001396440Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund V, LP)2024-06-300001396440main:BrightwoodCapitalFundInvestmentsMember2024-06-300001396440Burning Glass Intermediate Holding Company, Inc., Secured Debt 12024-06-300001396440Burning Glass Intermediate Holding Company, Inc., Secured Debt 22024-06-300001396440main:BurningGlassIntermediateHoldingCompanyIncMember2024-06-300001396440CAI Software LLC, Preferred Equity 12024-06-300001396440CAI Software LLC, Preferred Equity 22024-06-300001396440main:CAISoftwareLLCMember2024-06-300001396440CaseWorthy, Inc., Common Equity2024-06-300001396440main:CaseWorthyIncMember2024-06-300001396440Central Moloney, LLC, Secured Debt2024-06-300001396440Channel Partners Intermediateco, LLC, Secured Debt 12024-06-300001396440Channel Partners Intermediateco, LLC, Secured Debt 22024-06-300001396440Channel Partners Intermediateco, LLC, Secured Debt 32024-06-300001396440Channel Partners Intermediateco, LLC, Secured Debt 42024-06-300001396440main:ChannelPartnersIntermediatecoLLCMember2024-06-300001396440Clarius BIGS, LLC, Secured Debt2024-06-300001396440Computer Data Source, LLC, Secured Debt 12024-06-300001396440Computer Data Source, LLC, Secured Debt 22024-06-300001396440Computer Data Source, LLC, Secured Debt 32024-06-300001396440main:ComputerDataSourceLLCMember2024-06-300001396440Construction Supply Investments, LLC, Member Units2024-06-300001396440Coregistics Buyer LLC, Secured Debt 12024-06-300001396440Coregistics Buyer LLC, Secured Debt 22024-06-300001396440Coregistics Buyer LLC, Secured Debt 32024-06-300001396440main:CoregisticsBuyerLLCMember2024-06-300001396440CQ Fluency, LLC, Secured Debt 12024-06-300001396440CQ Fluency, LLC, Secured Debt 22024-06-300001396440CQ Fluency, LLC, Secured Debt 32024-06-300001396440main:CQFluencyLLCMember2024-06-300001396440Creative Foam Corporation, Secured Debt 12024-06-300001396440Creative Foam Corporation, Secured Debt 22024-06-300001396440main:CreativeFoamCorporationMember2024-06-300001396440Dalton US Inc., Common Stock2024-06-300001396440DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)2024-06-300001396440DTE Enterprises, LLC, Class A Preferred Member Units2024-06-300001396440main:DTEEnterprisesLLCMember2024-06-300001396440Dynamic Communities, LLC, Secured Debt 12024-06-300001396440Dynamic Communities, LLC, Secured Debt 22024-06-300001396440Dynamic Communities, LLC, Preferred Equity 12024-06-300001396440Dynamic Communities, LLC, Preferred Equity 22024-06-300001396440Dynamic Communities, LLC, Common Equity2024-06-300001396440main:DynamicCommunitiesLLCMember2024-06-300001396440Dynata, LLC, Secured Debt2024-06-300001396440Eastern Wholesale Fence LLC, Secured Debt 12024-06-300001396440Eastern Wholesale Fence LLC, Secured Debt 22024-06-300001396440Eastern Wholesale Fence LLC, Secured Debt 32024-06-300001396440Eastern Wholesale Fence LLC, Secured Debt 42024-06-300001396440Eastern Wholesale Fence LLC, Secured Debt 52024-06-300001396440main:EasternWholesaleFenceLLCMember2024-06-300001396440Emerald Technologies Acquisition Co, Inc., Secured Debt2024-06-300001396440EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII, L.P.)2024-06-300001396440EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co-Investors, L.P.)2024-06-300001396440EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund IX, L.P.)2024-06-300001396440EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund X, L.P.)2024-06-300001396440EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund XII, L.P.)2024-06-300001396440EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund II, L.P.)2024-06-300001396440EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund III, L.P.)2024-06-300001396440main:EnCapEnergyFundInvestmentsMember2024-06-300001396440Engineering Research & Consulting, LLC, Secured Debt 12024-06-300001396440Engineering Research & Consulting, LLC, Secured Debt 22024-06-300001396440main:EngineeringResearchConsultingLLCMember2024-06-300001396440Escalent, Inc., Secured Debt 12024-06-300001396440Escalent, Inc., Secured Debt 22024-06-300001396440Escalent, Inc., Common Equity2024-06-300001396440main:EscalentIncMember2024-06-300001396440Event Holdco, LLC, Secured Debt 12024-06-300001396440Event Holdco, LLC, Secured Debt 22024-06-300001396440main:EventHoldcoLLCMember2024-06-300001396440Fuse, LLC, Secured Debt2024-06-300001396440Fuse, LLC, Common Stock2024-06-300001396440main:FuseLLCMember2024-06-300001396440Garyline, LLC, Secured Debt 12024-06-300001396440Garyline, LLC, Secured Debt 22024-06-300001396440Garyline, LLC, Common Equity2024-06-300001396440main:GarylineLLCMember2024-06-300001396440GS HVAM Intermediate, LLC, Secured Debt 12024-06-300001396440GS HVAM Intermediate, LLC, Secured Debt 22024-06-300001396440GS HVAM Intermediate, LLC, Secured Debt 32024-06-300001396440GS HVAM Intermediate, LLC, Secured Debt 42024-06-300001396440GS HVAM Intermediate, LLC, Secured Debt 52024-06-300001396440main:GSHVAMIntermediateLLCMember2024-06-300001396440GULF PACIFIC ACQUISITION, LLC, Secured Debt 12024-06-300001396440GULF PACIFIC ACQUISITION, LLC, Secured Debt 22024-06-300001396440GULF PACIFIC ACQUISITION, LLC, Secured Debt 32024-06-300001396440main:GULFPACIFICACQUISITIONLLCMember2024-06-300001396440HDC/HW Intermediate Holdings, Secured Debt 12024-06-300001396440HDC/HW Intermediate Holdings, Secured Debt 22024-06-300001396440HDC/HW Intermediate Holdings, Common Equity2024-06-300001396440main:HDCHWIntermediateHoldingsMember2024-06-300001396440HEADLANDS OP-CO LLC, Secured Debt 12024-06-300001396440HEADLANDS OP-CO LLC, Secured Debt 22024-06-300001396440HEADLANDS OP-CO LLC, Secured Debt 32024-06-300001396440HEADLANDS OP-CO LLC, Secured Debt 42024-06-300001396440HEADLANDS OP-CO LLC, Secured Debt 52024-06-300001396440main:HEADLANDSOPCOLLCMember2024-06-300001396440HOWLCO LLC, Secured Debt2024-06-300001396440Hybrid Promotions, LLC, Secured Debt2024-06-300001396440IG Parent Corporation, Secured Debt 12024-06-300001396440IG Parent Corporation, Secured Debt 22024-06-300001396440IG Parent Corporation, Secured Debt 32024-06-300001396440main:IGParentCorporationMember2024-06-300001396440Imaging Business Machines, L.L.C., Secured Debt 12024-06-300001396440Imaging Business Machines, L.L.C., Secured Debt 22024-06-300001396440Imaging Business Machines, L.L.C., Common Equity2024-06-300001396440main:ImagingBusinessMachinesLLCMember2024-06-300001396440Implus Footcare, LLC, Secured Debt2024-06-300001396440Insight Borrower Corporation, Secured Debt 12024-06-300001396440Insight Borrower Corporation, Secured Debt 22024-06-300001396440Insight Borrower Corporation, Secured Debt 32024-06-300001396440Insight Borrower Corporation, Common Equity2024-06-300001396440main:InsightBorrowerCorporationMember2024-06-300001396440Inspire Aesthetics Management, LLC, Secured Debt 12024-06-300001396440Inspire Aesthetics Management, LLC, Secured Debt 22024-06-300001396440Inspire Aesthetics Management, LLC, Secured Debt 32024-06-300001396440Inspire Aesthetics Management, LLC, Common Equity2024-06-300001396440main:InspireAestheticsManagementLLCMember2024-06-300001396440Interface Security Systems, L.L.C, Secured Debt 12024-06-300001396440Interface Security Systems, L.L.C, Secured Debt 22024-06-300001396440Interface Security Systems, L.L.C, Common Stock2024-06-300001396440main:InterfaceSecuritySystemsLLCMember2024-06-300001396440Invincible Boat Company, LLC., Secured Debt 12024-06-300001396440Invincible Boat Company, LLC., Secured Debt 22024-06-300001396440main:InvincibleBoatCompanyLLCMember2024-06-300001396440INW Manufacturing, LLC, Secured Debt2024-06-300001396440Isagenix International, LLC, Secured Debt2024-06-300001396440Isagenix International, LLC, Common Equity2024-06-300001396440main:IsagenixInternationalLLCMember2024-06-300001396440Island Pump and Tank, LLC, Secured Debt 12024-06-300001396440Island Pump and Tank, LLC, Secured Debt 22024-06-300001396440Island Pump and Tank, LLC, Secured Debt 32024-06-300001396440Island Pump and Tank, LLC, Secured Debt 42024-06-300001396440main:IslandPumpAndTankLLCMember2024-06-300001396440Jackmont Hospitality, Inc., Secured Debt 12024-06-300001396440Jackmont Hospitality, Inc., Secured Debt 22024-06-300001396440Jackmont Hospitality, Inc., Secured Debt 32024-06-300001396440Jackmont Hospitality, Inc., Preferred Equity2024-06-300001396440main:JackmontHospitalityIncMember2024-06-300001396440JDC Power Services, LLC, Secured Debt 12024-06-300001396440JDC Power Services, LLC, Secured Debt 22024-06-300001396440main:JDCPowerServicesLLCMember2024-06-300001396440Joerns Healthcare, LLC, Secured Debt 12024-06-300001396440Joerns Healthcare, LLC, Secured Debt 22024-06-300001396440Joerns Healthcare, LLC, Secured Debt 32024-06-300001396440Joerns Healthcare, LLC, Secured Debt 42024-06-300001396440Joerns Healthcare, LLC, Common Stock 12024-06-300001396440Joerns Healthcare, LLC, Common Stock 22024-06-300001396440main:JoernsHealthcareLLCMember2024-06-300001396440JTI Electrical & Mechanical, LLC, Secured Debt 12024-06-300001396440JTI Electrical & Mechanical, LLC, Secured Debt 22024-06-300001396440JTI Electrical & Mechanical, LLC, Secured Debt 32024-06-300001396440JTI Electrical & Mechanical, LLC, Common Equity2024-06-300001396440main:JTIElectricalMechanicalLLCMember2024-06-300001396440KMS, LLC, Secured Debt 12024-06-300001396440KMS, LLC, Secured Debt 22024-06-300001396440main:KMSLLCMember2024-06-300001396440Lightbox Holdings, L.P., Secured Debt2024-06-300001396440LKCM Headwater Investments I, L.P., LP Interests2024-06-300001396440LL Management, Inc., Secured Debt 12024-06-300001396440LL Management, Inc., Secured Debt 22024-06-300001396440LL Management, Inc., Secured Debt 32024-06-300001396440LL Management, Inc., Secured Debt 42024-06-300001396440LL Management, Inc., Secured Debt 52024-06-300001396440main:LLManagementIncMember2024-06-300001396440LLFlex, LLC, Secured Debt2024-06-300001396440Logix Acquisition Company, LLC, Secured Debt2024-06-300001396440Looking Glass Investments, LLC, Member Units2024-06-300001396440Mako Steel, LP, Secured Debt 12024-06-300001396440Mako Steel, LP, Secured Debt 22024-06-300001396440Mako Steel, LP, Secured Debt 32024-06-300001396440main:MakoSteelLPMember2024-06-300001396440Microbe Formulas, LLC, Secured Debt 12024-06-300001396440Microbe Formulas, LLC, Secured Debt 22024-06-300001396440main:MicrobeFormulasLLCMember2024-06-300001396440Mills Fleet Farm Group, LLC, Secured Debt2024-06-300001396440Mini Melts of America, LLC, Secured Debt 12024-06-300001396440Mini Melts of America, LLC, Secured Debt 22024-06-300001396440Mini Melts of America, LLC, Secured Debt 32024-06-300001396440Mini Melts of America, LLC, Secured Debt 42024-06-300001396440Mini Melts of America, LLC, Common Equity2024-06-300001396440main:MiniMeltsOfAmericaLLCMember2024-06-300001396440MonitorUS Holding, LLC, Secured Debt 12024-06-300001396440MonitorUS Holding, LLC, Secured Debt 22024-06-300001396440MonitorUS Holding, LLC, Secured Debt 32024-06-300001396440MonitorUS Holding, LLC, Unsecured Debt2024-06-300001396440MonitorUS Holding, LLC, Common Stock2024-06-300001396440main:MonitorUSHoldingLLCMember2024-06-300001396440NinjaTrader, LLC, Secured Debt 12024-06-300001396440NinjaTrader, LLC, Secured Debt 22024-06-300001396440main:NinjaTraderLLCMember2024-06-300001396440Obra Capital, Inc., Secured Debt 12024-06-300001396440Obra Capital, Inc., Secured Debt 22024-06-300001396440main:ObraCapitalInc.Member2024-06-300001396440OnPoint, Secured Debt2024-06-300001396440Ospemifene Royalty Sub LLC, Secured Debt2024-06-300001396440Peaches Holding Corporation, Common Equity2024-06-300001396440Power System Solutions, Secured Debt 12024-06-300001396440Power System Solutions, Secured Debt 22024-06-300001396440Power System Solutions, Secured Debt 32024-06-300001396440Power System Solutions, Common Equity2024-06-300001396440main:PowerSystemSolutionsMember2024-06-300001396440PrimeFlight Aviation Services, Secured Debt 12024-06-300001396440PrimeFlight Aviation Services, Secured Debt 22024-06-300001396440PrimeFlight Aviation Services, Secured Debt 32024-06-300001396440PrimeFlight Aviation Services, Secured Debt 42024-06-300001396440main:PrimeFlightAviationServicesMember2024-06-300001396440PTL US Bidco, Inc, Secured Debt 12024-06-300001396440PTL US Bidco, Inc, Secured Debt 22024-06-300001396440main:PTLUSBidcoIncMember2024-06-300001396440Purge Rite, LLC, Secured Debt 12024-06-300001396440Purge Rite, LLC, Secured Debt 22024-06-300001396440Purge Rite, LLC, Preferred Equity2024-06-300001396440Purge Rite, LLC, Common Equity2024-06-300001396440main:PurgeRiteLLCMember2024-06-300001396440RA Outdoors LLC, Secured Debt 12024-06-300001396440RA Outdoors LLC, Secured Debt 22024-06-300001396440main:RAOutdoorsLLCMember2024-06-300001396440Richardson Sales Solutions, Secured Debt 12024-06-300001396440Richardson Sales Solutions, Secured Debt 22024-06-300001396440main:RichardsonSalesSolutionsMember2024-06-300001396440Roof Opco, LLC, Secured Debt 12024-06-300001396440Roof Opco, LLC, Secured Debt 22024-06-300001396440Roof Opco, LLC, Secured Debt 32024-06-300001396440main:RoofOpcoLLCMember2024-06-300001396440Rug Doctor, LLC., Secured Debt 12024-06-300001396440Rug Doctor, LLC., Secured Debt 22024-06-300001396440main:RugDoctorLLCMember2024-06-300001396440South Coast Terminals Holdings, LLC, Secured Debt 12024-06-300001396440South Coast Terminals Holdings, LLC, Secured Debt 22024-06-300001396440South Coast Terminals Holdings, LLC, Common Equity2024-06-300001396440main:SouthCoastTerminalsHoldingsLLCMember2024-06-300001396440SPAU Holdings, LLC, Secured Debt 12024-06-300001396440SPAU Holdings, LLC, Secured Debt 22024-06-300001396440SPAU Holdings, LLC, Common Stock2024-06-300001396440main:SPAUHoldingsLLCMember2024-06-300001396440Stellant Systems, Inc., Secured Debt 12024-06-300001396440Stellant Systems, Inc., Secured Debt 22024-06-300001396440main:StellantSystemsInc.Member2024-06-300001396440Team Public Choices, LLC, Secured Debt2024-06-300001396440Tectonic Financial, LLC, Common Stock2024-06-300001396440Tex Tech Tennis, LLC, Preferred Equity2024-06-300001396440Titan Meter Midco Corp., Secured Debt 12024-06-300001396440Titan Meter Midco Corp., Secured Debt 22024-06-300001396440Titan Meter Midco Corp., Preferred Equity2024-06-300001396440main:TitanMeterMidcoCorp.Member2024-06-300001396440U.S. TelePacific Corp., Secured Debt 12024-06-300001396440U.S. TelePacific Corp., Secured Debt 22024-06-300001396440main:USTelePacificCorpMember2024-06-300001396440UserZoom Technologies, Inc., Secured Debt2024-06-300001396440Veregy Consolidated, Inc., Secured Debt 12024-06-300001396440Veregy Consolidated, Inc., Secured Debt 22024-06-300001396440main:VeregyConsolidatedIncMember2024-06-300001396440Vistar Media, Inc., Preferred Stock2024-06-300001396440Vitesse Systems, Secured Debt 12024-06-300001396440Vitesse Systems, Secured Debt 22024-06-300001396440main:VitesseSystemsMember2024-06-300001396440VORTEQ Coil Finishers, LLC, Common Equity2024-06-300001396440Wall Street Prep, Inc., Secured Debt 12024-06-300001396440Wall Street Prep, Inc., Secured Debt 22024-06-300001396440Wall Street Prep, Inc., Common Stock2024-06-300001396440main:WallStreetPrepIncMember2024-06-300001396440Watterson Brands, LLC, Secured Debt 12024-06-300001396440Watterson Brands, LLC, Secured Debt 22024-06-300001396440Watterson Brands, LLC, Secured Debt 32024-06-300001396440Watterson Brands, LLC, Secured Debt 42024-06-300001396440main:WattersonBrandsLLCMember2024-06-300001396440West Star Aviation Acquisition, LLC, Secured Debt 12024-06-300001396440West Star Aviation Acquisition, LLC, Secured Debt 22024-06-300001396440West Star Aviation Acquisition, LLC, Secured Debt 32024-06-300001396440West Star Aviation Acquisition, LLC, Common Stock2024-06-300001396440main:WestStarAviationAcquisitionLLCMember2024-06-300001396440Winter Services LLC, Secured Debt 12024-06-300001396440Winter Services LLC, Secured Debt 22024-06-300001396440Winter Services LLC, Secured Debt 32024-06-300001396440Winter Services LLC, Secured Debt 42024-06-300001396440main:WinterServicesLLCMember2024-06-300001396440Xenon Arc, Inc., Secured Debt 12024-06-300001396440Xenon Arc, Inc., Secured Debt 22024-06-300001396440main:XenonArcIncMember2024-06-300001396440YS Garments, LLC, Secured Debt2024-06-300001396440Zips Car Wash, LLC, Secured Debt 12024-06-300001396440Zips Car Wash, LLC, Secured Debt 22024-06-300001396440main:ZipsCarWashLLCMember2024-06-300001396440ZRG Partners, LLC, Secured Debt 12024-06-300001396440ZRG Partners, LLC, Secured Debt 22024-06-300001396440ZRG Partners, LLC, Secured Debt 32024-06-300001396440ZRG Partners, LLC, Secured Debt 42024-06-300001396440main:ZRGPartnersLLCMember2024-06-300001396440Dreyfus Government Cash Management2024-06-300001396440Fidelity Government Fund2024-06-300001396440Fidelity Treasury2024-06-300001396440us-gaap:MoneyMarketFundsMember2024-06-300001396440srt:MinimumMemberus-gaap:SecuredOvernightFinancingRateSofrMember2024-06-300001396440srt:MaximumMemberus-gaap:SecuredOvernightFinancingRateSofrMember2024-06-300001396440srt:WeightedAverageMemberus-gaap:SecuredOvernightFinancingRateSofrMember2024-06-300001396440srt:MinimumMember2024-06-300001396440srt:MaximumMember2024-06-300001396440Garreco, LLC, Secured Debt2024-06-300001396440Acumera, Inc., Warrants2024-01-012024-06-300001396440main:VitesseSystemsMemberus-gaap:SecuredOvernightFinancingRateSofrMember2024-06-300001396440main:VitesseSystemsMemberus-gaap:PrimeRateMember2024-06-300001396440Analytical Systems Keco Holdings, LLC, Secured Debt 12023-12-310001396440Analytical Systems Keco Holdings, LLC, Secured Debt 22023-12-310001396440Analytical Systems Keco Holdings, LLC, Preferred Member Units 12023-12-310001396440Analytical Systems Keco Holdings, LLC, Preferred Member Units 22023-12-310001396440Analytical Systems Keco Holdings, LLC, Warrants2023-12-310001396440main:AnalyticalSystemsKecoHoldingsLLCMember2023-12-310001396440ASC Interests, LLC, Secured Debt 12023-12-310001396440ASC Interests, LLC, Secured Debt 22023-12-310001396440ASC Interests, LLC, Preferred Member Units2023-12-310001396440ASC Interests, LLC, Member Units2023-12-310001396440main:ASCInterestsLLCMember2023-12-310001396440ATS Workholding, LLC, Secured Debt 12023-12-310001396440ATS Workholding, LLC, Secured Debt 22023-12-310001396440ATS Workholding, LLC, Preferred Member Units2023-12-310001396440main:ATSWorkholdingLLCMember2023-12-310001396440Barfly Ventures, LLC, Secured Debt2023-12-310001396440Barfly Ventures, LLC, Member Units2023-12-310001396440main:BarflyVenturesLLCMember2023-12-310001396440Batjer TopCo, LLC, Secured Debt 12023-12-310001396440Batjer TopCo, LLC, Secured Debt 22023-12-310001396440Batjer TopCo, LLC, Secured Debt 32023-12-310001396440Batjer TopCo, LLC, Preferred Stock2023-12-310001396440main:BatjerTopCoLLCMember2023-12-310001396440Bolder Panther Group, LLC, Secured Debt2023-12-310001396440Bolder Panther Group, LLC, Class B Preferred Member Units2023-12-310001396440main:BolderPantherGroupLLCMember2023-12-310001396440Brewer Crane Holdings, LLC, Secured Debt2023-12-310001396440Brewer Crane Holdings, LLC, Preferred Member Units2023-12-310001396440main:BrewerCraneHoldingsLLCMember2023-12-310001396440Bridge Capital Solutions Corporation, Secured Debt 12023-12-310001396440Bridge Capital Solutions Corporation, Secured Debt 22023-12-310001396440Bridge Capital Solutions Corporation, Warrants2023-12-310001396440Bridge Capital Solutions Corporation, Preferred Member Units2023-12-310001396440main:BridgeCapitalSolutionsCorporationMember2023-12-310001396440Café Brazil, LLC, Member Units2023-12-310001396440California Splendor Holdings LLC, Secured Debt2023-12-310001396440California Splendor Holdings LLC, Preferred Member Units 12023-12-310001396440California Splendor Holdings LLC, Preferred Member Units 22023-12-310001396440main:CaliforniaSplendorHoldingsLLCMember2023-12-310001396440CBT Nuggets, LLC, Member Units2023-12-310001396440Centre Technologies Holdings, LLC, Secured Debt 12023-12-310001396440Centre Technologies Holdings, LLC, Secured Debt 22023-12-310001396440Centre Technologies Holdings, LLC, Preferred Member Units2023-12-310001396440main:CentreTechnologiesHoldingsLLCMember2023-12-310001396440Chamberlin Holding LLC, Secured Debt 12023-12-310001396440Chamberlin Holding LLC, Secured Debt 22023-12-310001396440Chamberlin Holding LLC, Member Units 12023-12-310001396440Chamberlin Holding LLC, Member Units 22023-12-310001396440main:ChamberlinHoldingLLCMember2023-12-310001396440Charps, LLC, Unsecured Debt2023-12-310001396440Charps, LLC, Preferred Member Units2023-12-310001396440main:CharpsLLCMember2023-12-310001396440Clad-Rex Steel, LLC, Secured Debt 12023-12-310001396440Clad-Rex Steel, LLC, Secured Debt 22023-12-310001396440Clad-Rex Steel, LLC, Secured Debt 32023-12-310001396440Clad-Rex Steel, LLC, Member Units 12023-12-310001396440Clad-Rex Steel, LLC, Member Units 22023-12-310001396440main:CladRexSteelLLCMember2023-12-310001396440Cody Pools, Inc., Secured Debt 12023-12-310001396440Cody Pools, Inc., Secured Debt 22023-12-310001396440Cody Pools, Inc., Preferred Member Units2023-12-310001396440main:CodyPoolsIncMember2023-12-310001396440Colonial Electric Company LLC, Secured Debt 12023-12-310001396440Colonial Electric Company LLC, Secured Debt 22023-12-310001396440Colonial Electric Company LLC, Preferred Member Units 12023-12-310001396440Colonial Electric Company LLC, Preferred Member Units 22023-12-310001396440main:ColonialElectricCompanyLLCMember2023-12-310001396440CompareNetworks Topco, LLC, Secured Debt 12023-12-310001396440CompareNetworks Topco, LLC, Secured Debt 22023-12-310001396440CompareNetworks Topco, LLC, Preferred Member Units2023-12-310001396440main:CompareNetworksTopcoLLCMember2023-12-310001396440Compass Systems & Sales, LLC, Secured Debt 12023-12-310001396440Compass Systems & Sales, LLC, Secured Debt 22023-12-310001396440Compass Systems & Sales, LLC, Preferred Equity2023-12-310001396440main:CompassSystemsSalesLLCMember2023-12-310001396440Copper Trail Fund Investments, LP Interests (CTMH, LP)2023-12-310001396440Cybermedia Technologies, LLC, Secured Debt 12023-12-310001396440Cybermedia Technologies, LLC, Secured Debt 22023-12-310001396440Cybermedia Technologies, LLC, Preferred Member Units2023-12-310001396440main:CybermediaTechnologiesLLCMember2023-12-310001396440Datacom, LLC, Secured Debt 12023-12-310001396440Datacom, LLC, Secured Debt 22023-12-310001396440Datacom, LLC, Preferred Member Units2023-12-310001396440main:DatacomLLCMember2023-12-310001396440Digital Products Holdings LLC, Secured Debt2023-12-310001396440Digital Products Holdings LLC, Preferred Member Units2023-12-310001396440main:DigitalProductsHoldingsLLCMember2023-12-310001396440Direct Marketing Solutions, Inc., Secured Debt 12023-12-310001396440Direct Marketing Solutions, Inc., Secured Debt 22023-12-310001396440Direct Marketing Solutions, Inc., Preferred Stock2023-12-310001396440main:DirectMarketingSolutionsIncMember2023-12-310001396440Elgin AcquireCo, LLC, Secured Debt 12023-12-310001396440Elgin AcquireCo, LLC, Secured Debt 22023-12-310001396440Elgin AcquireCo, LLC, Secured Debt 32023-12-310001396440Elgin AcquireCo, LLC, Common Stock 12023-12-310001396440Elgin AcquireCo, LLC, Common Stock 22023-12-310001396440main:ElginAcquireCoLLCMember2023-12-310001396440Gamber-Johnson Holdings, LLC, Secured Debt 12023-12-310001396440Gamber-Johnson Holdings, LLC, Secured Debt 22023-12-310001396440Gamber-Johnson Holdings, LLC, Member Units2023-12-310001396440main:GamberJohnsonHoldingsLLCMember2023-12-310001396440Garreco, LLC, Secured Debt2023-12-310001396440Garreco, LLC, Member Units2023-12-310001396440main:GarrecoLLCMember2023-12-310001396440GRT Rubber Technologies LLC, Secured Debt 12023-12-310001396440GRT Rubber Technologies LLC, Secured Debt 22023-12-310001396440GRT Rubber Technologies LLC, Member Units2023-12-310001396440main:GRTRubberTechnologiesLLCMember2023-12-310001396440Gulf Manufacturing, LLC, Member Units2023-12-310001396440Gulf Publishing Holdings, LLC, Secured Debt 12023-12-310001396440Gulf Publishing Holdings, LLC, Secured Debt 22023-12-310001396440Gulf Publishing Holdings, LLC, Preferred Equity2023-12-310001396440Gulf Publishing Holdings, LLC, Member Units2023-12-310001396440main:GulfPublishingHoldingsLLCMember2023-12-310001396440Harris Preston Fund Investments, LP Interests (2717 MH, L.P.)2023-12-310001396440Harris Preston Fund Investments, LP Interests (2717 HPP-MS, L.P.)2023-12-310001396440main:HarrisPrestonFundInvestmentsOneMember2023-12-310001396440Harrison Hydra-Gen, Ltd., Common Stock2023-12-310001396440IG Investor, LLC, Secured Debt 12023-12-310001396440IG Investor, LLC, Secured Debt 22023-12-310001396440IG Investor, LLC, Common Equity2023-12-310001396440main:IGInvestorLLCMember2023-12-310001396440Jensen Jewelers of Idaho, LLC, Secured Debt 12023-12-310001396440Jensen Jewelers of Idaho, LLC, Secured Debt 22023-12-310001396440Jensen Jewelers of Idaho, LLC, Member Units2023-12-310001396440main:JensenJewelersOfIdahoLLCMember2023-12-310001396440JorVet Holdings, LLC, Secured Debt2023-12-310001396440JorVet Holdings, LLC, Preferred Equity2023-12-310001396440main:JorVetHoldingsLLCMember2023-12-310001396440KBK Industries, LLC, Secured Debt2023-12-310001396440KBK Industries, LLC, Member Units2023-12-310001396440main:KBKIndustriesLLCMember2023-12-310001396440Kickhaefer Manufacturing Company, LLC, Secured Debt 12023-12-310001396440Kickhaefer Manufacturing Company, LLC, Secured Debt 22023-12-310001396440Kickhaefer Manufacturing Company, LLC, Preferred Equity2023-12-310001396440Kickhaefer Manufacturing Company, LLC, Member Units2023-12-310001396440main:KickhaeferManufacturingCompanyLLCMember2023-12-310001396440Metalforming Holdings, LLC, Secured Debt 12023-12-310001396440Metalforming Holdings, LLC, Secured Debt 22023-12-310001396440Metalforming Holdings, LLC, Preferred Equity2023-12-310001396440Metalforming Holdings, LLC, Common Stock2023-12-310001396440main:MetalFormingHoldingLLCMember2023-12-310001396440MH Corbin Holding LLC, Secured Debt2023-12-310001396440MH Corbin Holding LLC, Preferred Member Units 12023-12-310001396440MH Corbin Holding LLC, Preferred Member Units 22023-12-310001396440main:MHCorbinHoldingLLCMember2023-12-310001396440MS Private Loan Fund I, LP, Secured Debt2023-12-310001396440MS Private Loan Fund I, LP, LP Interests2023-12-310001396440main:MSPrivateLoanFundILPMember2023-12-310001396440MS Private Loan Fund II, LP, Secured Debt2023-12-310001396440MS Private Loan Fund II, LP, LP Interests2023-12-310001396440main:MSPrivateLoanFundIILPMember2023-12-310001396440MSC Adviser I, LLC, Member Units2023-12-310001396440MSC Income Fund, Inc., Common Equity2023-12-310001396440Mystic Logistics Holdings, LLC, Secured Debt 12023-12-310001396440Mystic Logistics Holdings, LLC, Secured Debt 22023-12-310001396440Mystic Logistics Holdings, LLC, Common Stock2023-12-310001396440main:MysticLogisticsHoldingsLLCMember2023-12-310001396440NAPCO Precast, LLC, Member Units2023-12-310001396440Nebraska Vet AcquireCo, LLC, Secured Debt 12023-12-310001396440Nebraska Vet AcquireCo, LLC, Secured Debt 22023-12-310001396440Nebraska Vet AcquireCo, LLC, Secured Debt 32023-12-310001396440Nebraska Vet AcquireCo, LLC, Preferred Member Units2023-12-310001396440main:NebraskaVetAcquireCoLLCMember2023-12-310001396440NexRev LLC, Secured Debt 12023-12-310001396440NexRev LLC, Secured Debt 22023-12-310001396440NexRev LLC, Preferred Member Units2023-12-310001396440main:NexRevLLCMember2023-12-310001396440NRP Jones, LLC, Secured Debt2023-12-310001396440NRP Jones, LLC, Member Units 12023-12-310001396440NRP Jones, LLC, Member Units 22023-12-310001396440main:NRPJonesLLCMember2023-12-310001396440NuStep, LLC, Secured Debt 12023-12-310001396440NuStep, LLC, Secured Debt 22023-12-310001396440NuStep, LLC, Preferred Member Units 12023-12-310001396440NuStep, LLC, Preferred Member Units 22023-12-310001396440main:NuStepLLCMember2023-12-310001396440OMi Topco, LLC, Secured Debt2023-12-310001396440OMi Topco, LLC, Preferred Member Units2023-12-310001396440main:OMiTopcoLLCMember2023-12-310001396440Orttech Holdings, LLC, Secured Debt 12023-12-310001396440Orttech Holdings, LLC, Secured Debt 22023-12-310001396440Orttech Holdings, LLC, Preferred Stock2023-12-310001396440main:OrttechHoldingsLLCMember2023-12-310001396440Pearl Meyer Topco LLC, Secured Debt 12023-12-310001396440Pearl Meyer Topco LLC, Secured Debt 22023-12-310001396440Pearl Meyer Topco LLC, Secured Debt 32023-12-310001396440Pearl Meyer Topco LLC, Preferred Equity2023-12-310001396440main:PearlMeyerTopcoLLCMember2023-12-310001396440Pinnacle TopCo, LLC, Secured Debt 12023-12-310001396440Pinnacle TopCo, LLC, Secured Debt 22023-12-310001396440Pinnacle TopCo, LLC, Preferred Equity2023-12-310001396440main:PinnacleTopCoLLCMember2023-12-310001396440PPL RVs, Inc., Secured Debt 12023-12-310001396440PPL RVs, Inc., Secured Debt 22023-12-310001396440PPL RVs, Inc., Common Stock 12023-12-310001396440PPL RVs, Inc., Common Stock 22023-12-310001396440main:PPLRVsIncMember2023-12-310001396440Principle Environmental, LLC, Secured Debt 12023-12-310001396440Principle Environmental, LLC, Secured Debt 22023-12-310001396440Principle Environmental, LLC, Preferred Member Units2023-12-310001396440Principle Environmental, LLC, Common Stock2023-12-310001396440main:PrincipleEnvironmentalLLCMember2023-12-310001396440Quality Lease Service, LLC, Member Units2023-12-310001396440River Aggregates, LLC, Member Units2023-12-310001396440Robbins Bros. Jewelry, Inc., Secured Debt 12023-12-310001396440Robbins Bros. Jewelry, Inc., Secured Debt 22023-12-310001396440Robbins Bros. Jewelry, Inc., Preferred Equity2023-12-310001396440main:RobbinsBrosJewelryIncMember2023-12-310001396440Tedder Industries, LLC, Secured Debt 12023-12-310001396440Tedder Industries, LLC, Secured Debt 22023-12-310001396440Tedder Industries, LLC, Preferred Member Units 12023-12-310001396440Tedder Industries, LLC, Preferred Member Units 22023-12-310001396440Tedder Industries, LLC, Preferred Member Units 32023-12-310001396440main:TedderIndustriesLLCMember2023-12-310001396440Televerde, LLC, Preferred Stock2023-12-310001396440Televerde, LLC, Member Units2023-12-310001396440main:TeleverdeLLCMember2023-12-310001396440Trantech Radiator Topco, LLC, Secured Debt 12023-12-310001396440Trantech Radiator Topco, LLC, Secured Debt 22023-12-310001396440Trantech Radiator Topco, LLC, Common Stock2023-12-310001396440main:TrantechRadiatorTopcoLLCMember2023-12-310001396440Vision Interests, Inc., Series A Preferred Stock2023-12-310001396440Volusion, LLC, Secured Debt2023-12-310001396440Volusion, LLC, Preferred Member Units 12023-12-310001396440Volusion, LLC, Preferred Member Units 22023-12-310001396440Volusion, LLC, Preferred Member Units 32023-12-310001396440Volusion, LLC, Common Stock2023-12-310001396440main:VolusionLLCMember2023-12-310001396440VVS Holdco LLC, Secured Debt 12023-12-310001396440VVS Holdco LLC, Secured Debt 22023-12-310001396440VVS Holdco LLC, Preferred Equity2023-12-310001396440main:VVSHoldcoLLCMember2023-12-310001396440Ziegler’s NYPD, LLC, Secured Debt 12023-12-310001396440Ziegler’s NYPD, LLC, Secured Debt 22023-12-310001396440Ziegler’s NYPD, LLC, Secured Debt 32023-12-310001396440Ziegler’s NYPD, LLC, Preferred Member Units2023-12-310001396440Ziegler’s NYPD, LLC, Warrants2023-12-310001396440main:ZieglersNYPDLLCMember2023-12-310001396440AAC Holdings, Inc., Secured Debt 12023-12-310001396440AAC Holdings, Inc., Secured Debt 22023-12-310001396440AAC Holdings, Inc., Common Stock2023-12-310001396440AAC Holdings, Inc., Warrants2023-12-310001396440main:AACHoldingsIncMember2023-12-310001396440Boccella Precast Products LLC, Secured Debt2023-12-310001396440Boccella Precast Products LLC, Member Units2023-12-310001396440main:BoccellaPrecastProductsLLCMember2023-12-310001396440Buca C, LLC, Secured Debt2023-12-310001396440Buca C, LLC, Preferred Member Units2023-12-310001396440main:BucaCLLCMember2023-12-310001396440Career Team Holdings, LLC, Secured Debt 12023-12-310001396440Career Team Holdings, LLC, Secured Debt 22023-12-310001396440Career Team Holdings, LLC, Common Stock2023-12-310001396440main:CareerTeamHoldingsLLCMember2023-12-310001396440Classic H&G Holdings, LLC, Secured Debt 12023-12-310001396440Classic H&G Holdings, LLC, Secured Debt 22023-12-310001396440Classic H&G Holdings, LLC, Preferred Member Units2023-12-310001396440main:ClassicHGHoldingsLLCMember2023-12-310001396440Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)2023-12-310001396440DMA Industries, LLC, Secured Debt2023-12-310001396440DMA Industries, LLC, Preferred Equity2023-12-310001396440main:DMAIndustriesLLCMember2023-12-310001396440Dos Rios Partners, LP Interests (Dos Rios Partners, LP)2023-12-310001396440Dos Rios Partners, LP Interests (Dos Rios Partners - A, LP)2023-12-310001396440main:DosRiosPartnersMember2023-12-310001396440Dos Rios Stone Products LLC, Class A Preferred Units2023-12-310001396440EIG Fund Investments, LP Interests (EIG Global Private Debt Fund-A, L.P.)2023-12-310001396440Flame King Holdings, LLC, Preferred Equity2023-12-310001396440Freeport Financial Funds, LP Interests (Freeport Financial SBIC Fund LP)2023-12-310001396440Freeport Financial Funds, LP Interests (Freeport First Lien Loan Fund III LP)2023-12-310001396440main:FreeportFinancialFundsMember2023-12-310001396440GFG Group, LLC, Secured Debt2023-12-310001396440GFG Group, LLC, Preferred Member Units2023-12-310001396440main:GFGGroupLLCMember2023-12-310001396440Harris Preston Fund Investments, LP Interests (HPEP 3, L.P.)2023-12-310001396440Harris Preston Fund Investments, LP Interests (HPEP 4, L.P.)2023-12-310001396440Harris Preston Fund Investments, LP Interests (423 COR, L.P.)2023-12-310001396440Harris Preston Fund Investments, LP Interests (423 HAR, L.P.)2023-12-310001396440main:HarrisPrestonFundInvestmentsTwoMember2023-12-310001396440Hawk Ridge Systems, LLC, Secured Debt 12023-12-310001396440Hawk Ridge Systems, LLC, Secured Debt 22023-12-310001396440Hawk Ridge Systems, LLC, Preferred Member Units 12023-12-310001396440Hawk Ridge Systems, LLC, Preferred Member Units 22023-12-310001396440main:HawkRidgeSystemsLLCMember2023-12-310001396440Houston Plating and Coatings, LLC, Unsecured Convertible Debt2023-12-310001396440Houston Plating and Coatings, LLC, Member Units2023-12-310001396440main:HoustonPlatingAndCoatingsLLCMember2023-12-310001396440I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)2023-12-310001396440Independent Pet Partners Intermediate Holdings, LLC, Common Equity2023-12-310001396440Infinity X1 Holdings, LLC, Secured Debt2023-12-310001396440Infinity X1 Holdings, LLC, Preferred Equity2023-12-310001396440main:InfinityX1HoldingsLLCMember2023-12-310001396440Integral Energy Services, Secured Debt2023-12-310001396440Integral Energy Services, Preferred Equity2023-12-310001396440Integral Energy Services, Common Stock2023-12-310001396440main:IntegralEnergyServicesMember2023-12-310001396440Iron-Main Investments, LLC, Secured Debt 12023-12-310001396440Iron-Main Investments, LLC, Secured Debt 22023-12-310001396440Iron-Main Investments, LLC, Secured Debt 32023-12-310001396440Iron-Main Investments, LLC, Secured Debt 42023-12-310001396440Iron-Main Investments, LLC, Secured Debt 52023-12-310001396440Iron-Main Investments, LLC, Common Stock2023-12-310001396440main:IronMainInvestmentsLLCMember2023-12-310001396440ITA Holdings Group, LLC, Secured Debt 12023-12-310001396440ITA Holdings Group, LLC, Secured Debt 22023-12-310001396440ITA Holdings Group, LLC, Secured Debt 32023-12-310001396440ITA Holdings Group, LLC, Secured Debt 42023-12-310001396440ITA Holdings Group, LLC, Warrants2023-12-310001396440main:ITAHoldingsGroupLLCMember2023-12-310001396440Johnson Downie Opco, LLC, Secured Debt 12023-12-310001396440Johnson Downie Opco, LLC, Secured Debt 22023-12-310001396440Johnson Downie Opco, LLC, Preferred Equity2023-12-310001396440main:JohnsonDownieOpcoLLCMember2023-12-310001396440OnAsset Intelligence, Inc., Secured Debt 12023-12-310001396440OnAsset Intelligence, Inc., Secured Debt 22023-12-310001396440OnAsset Intelligence, Inc., Secured Debt 32023-12-310001396440OnAsset Intelligence, Inc., Secured Debt 42023-12-310001396440OnAsset Intelligence, Inc., Unsecured Debt2023-12-310001396440OnAsset Intelligence, Inc., Preferred Stock2023-12-310001396440OnAsset Intelligence, Inc., Common Stock2023-12-310001396440OnAsset Intelligence, Inc., Warrants2023-12-310001396440main:OnAssetIntelligenceIncMember2023-12-310001396440Oneliance, LLC, Secured Debt 12023-12-310001396440Oneliance, LLC, Secured Debt 22023-12-310001396440Oneliance, LLC, Preferred Stock2023-12-310001396440main:OnelianceLLCMember2023-12-310001396440Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Preferred Member Units2023-12-310001396440SI East, LLC, Secured Debt 12023-12-310001396440SI East, LLC, Secured Debt 22023-12-310001396440SI East, LLC, Preferred Member Units2023-12-310001396440main:SIEastLLCMember2023-12-310001396440Slick Innovations, LLC, Secured Debt2023-12-310001396440Slick Innovations, LLC, Common Stock2023-12-310001396440main:SlickInnovationsLLCMember2023-12-310001396440Student Resource Center, LLC, Secured Debt2023-12-310001396440Student Resource Center, LLC, Preferred Equity2023-12-310001396440main:StudentResourceCenterLLCMember2023-12-310001396440Superior Rigging & Erecting Co., Secured Debt2023-12-310001396440Superior Rigging & Erecting Co., Preferred Member Units2023-12-310001396440main:SuperiorRiggingErectingCoMember2023-12-310001396440The Affiliati Network, LLC, Secured Debt 12023-12-310001396440The Affiliati Network, LLC, Secured Debt 22023-12-310001396440The Affiliati Network, LLC, Preferred Stock 12023-12-310001396440The Affiliati Network, LLC, Preferred Stock 22023-12-310001396440main:TheAffiliatiNetworkLLCMember2023-12-310001396440UnionRock Energy Fund II, LP, LP Interests2023-12-310001396440UnionRock Energy Fund III, LP, LP Interests2023-12-310001396440UniTek Global Services, Inc., Secured Convertible Debt 12023-12-310001396440UniTek Global Services, Inc., Secured Convertible Debt 22023-12-310001396440UniTek Global Services, Inc., Preferred Stock 12023-12-310001396440UniTek Global Services, Inc., Preferred Stock 22023-12-310001396440UniTek Global Services, Inc., Preferred Stock 32023-12-310001396440UniTek Global Services, Inc., Preferred Stock 42023-12-310001396440UniTek Global Services, Inc., Common Stock2023-12-310001396440main:UniTekGlobalServicesIncMember2023-12-310001396440Universal Wellhead Services Holdings, LLC, Preferred Member Units2023-12-310001396440Universal Wellhead Services Holdings, LLC, Member Units2023-12-310001396440main:UniversalWellheadServicesHoldingsLLCMember2023-12-310001396440World Micro Holdings, LLC, Secured Debt2023-12-310001396440World Micro Holdings, LLC, Preferred Equity2023-12-310001396440main:WorldMicroHoldingsLLCMember2023-12-310001396440AB Centers Acquisition Corporation, Secured Debt 12023-12-310001396440AB Centers Acquisition Corporation, Secured Debt 22023-12-310001396440AB Centers Acquisition Corporation, Secured Debt 32023-12-310001396440AB Centers Acquisition Corporation, Secured Debt 42023-12-310001396440main:ABCentersAcquisitionCorporationMember2023-12-310001396440Acumera, Inc., Secured Debt 12023-12-310001396440Acumera, Inc., Secured Debt 22023-12-310001396440Acumera, Inc., Warrants2023-12-310001396440main:AcumeraIncMember2023-12-310001396440Adams Publishing Group, LLC, Secured Debt 12023-12-310001396440Adams Publishing Group, LLC, Secured Debt 22023-12-310001396440main:AdamsPublishingGroupLLCMember2023-12-310001396440ADS Tactical, Inc., Secured Debt2023-12-310001396440AMEREQUIP LLC, Secured Debt 12023-12-310001396440AMEREQUIP LLC, Secured Debt 22023-12-310001396440AMEREQUIP LLC, Common Stock2023-12-310001396440main:AMEREQUIPLLCMember2023-12-310001396440American Health Staffing Group, Inc., Secured Debt 12023-12-310001396440American Health Staffing Group, Inc., Secured Debt 22023-12-310001396440main:AmericanHealthStaffingGroupIncMember2023-12-310001396440American Nuts, LLC, Secured Debt 12023-12-310001396440American Nuts, LLC, Secured Debt 22023-12-310001396440American Nuts, LLC, Secured Debt 32023-12-310001396440American Nuts, LLC, Secured Debt 42023-12-310001396440main:AmericanNutsLLCMember2023-12-310001396440American Teleconferencing Services, Ltd., Secured Debt 12023-12-310001396440American Teleconferencing Services, Ltd., Secured Debt 22023-12-310001396440main:AmericanTeleconferencingServicesLtdMember2023-12-310001396440ArborWorks, LLC, Secured Debt 12023-12-310001396440ArborWorks, LLC, Secured Debt 22023-12-310001396440ArborWorks, LLC, Preferred Equity 12023-12-310001396440ArborWorks, LLC, Preferred Equity 22023-12-310001396440ArborWorks, LLC, Common Equity2023-12-310001396440main:ArborWorksLLCMember2023-12-310001396440Archer Systems, LLC, Common Stock2023-12-310001396440ATS Operating, LLC, Secured Debt 12023-12-310001396440ATS Operating, LLC, Secured Debt 22023-12-310001396440ATS Operating, LLC, Secured Debt 32023-12-310001396440ATS Operating, LLC, Common Stock2023-12-310001396440main:ATSOperatingLLCMember2023-12-310001396440AVEX Aviation Holdings, LLC, Secured Debt 12023-12-310001396440AVEX Aviation Holdings, LLC, Secured Debt 22023-12-310001396440AVEX Aviation Holdings, LLC, Common Equity2023-12-310001396440main:AVEXAviationHoldingsLLCMember2023-12-310001396440Berry Aviation, Inc., Preferred Member Units 12023-12-310001396440Berry Aviation, Inc., Preferred Member Units 22023-12-310001396440main:BerryAviationIncMember2023-12-310001396440Bettercloud, Inc., Secured Debt 12023-12-310001396440Bettercloud, Inc., Secured Debt 22023-12-310001396440main:BettercloudIncMember2023-12-310001396440Binswanger Enterprises, LLC, Member Units2023-12-310001396440Bluestem Brands, Inc., Secured Debt 12023-12-310001396440Bluestem Brands, Inc., Secured Debt 22023-12-310001396440Bluestem Brands, Inc., Common Stock2023-12-310001396440Bluestem Brands, Inc., Warrants2023-12-310001396440main:BluestemBrandsIncMember2023-12-310001396440Bond Brand Loyalty ULC, Secured Debt 12023-12-310001396440Bond Brand Loyalty ULC, Secured Debt 22023-12-310001396440Bond Brand Loyalty ULC, Secured Debt 32023-12-310001396440Bond Brand Loyalty ULC, Preferred Equity2023-12-310001396440Bond Brand Loyalty ULC, Common Equity2023-12-310001396440main:BondBrandLoyaltyULCMember2023-12-310001396440Brainworks Software, LLC, Secured Debt 12023-12-310001396440Brainworks Software, LLC, Secured Debt 22023-12-310001396440main:BrainworksSoftwareLLCMember2023-12-310001396440Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund III, LP)2023-12-310001396440Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund IV, LP)2023-12-310001396440Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund V, LP)2023-12-310001396440main:BrightwoodCapitalFundInvestmentsMember2023-12-310001396440Burning Glass Intermediate Holding Company, Inc., Secured Debt 12023-12-310001396440Burning Glass Intermediate Holding Company, Inc., Secured Debt 22023-12-310001396440main:BurningGlassIntermediateHoldingCompanyIncMember2023-12-310001396440CAI Software LLC, Preferred Equity 12023-12-310001396440CAI Software LLC, Preferred Equity 22023-12-310001396440main:CAISoftwareLLCMember2023-12-310001396440CaseWorthy, Inc., Secured Debt 12023-12-310001396440CaseWorthy, Inc., Secured Debt 22023-12-310001396440CaseWorthy, Inc., Secured Debt 32023-12-310001396440CaseWorthy, Inc., Common Equity2023-12-310001396440main:CaseWorthyIncMember2023-12-310001396440Channel Partners Intermediateco, LLC, Secured Debt 12023-12-310001396440Channel Partners Intermediateco, LLC, Secured Debt 22023-12-310001396440Channel Partners Intermediateco, LLC, Secured Debt 32023-12-310001396440Channel Partners Intermediateco, LLC, Secured Debt 42023-12-310001396440main:ChannelPartnersIntermediatecoLLCMember2023-12-310001396440Clarius BIGS, LLC, Secured Debt2023-12-310001396440Computer Data Source, LLC, Secured Debt 12023-12-310001396440Computer Data Source, LLC, Secured Debt 22023-12-310001396440main:ComputerDataSourceLLCMember2023-12-310001396440Construction Supply Investments, LLC, Member Units2023-12-310001396440CQ Fluency, LLC, Secured Debt 12023-12-310001396440CQ Fluency, LLC, Secured Debt 22023-12-310001396440CQ Fluency, LLC, Secured Debt 32023-12-310001396440main:CQFluencyLLCMember2023-12-310001396440Dalton US Inc., Common Stock2023-12-310001396440DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)2023-12-310001396440DTE Enterprises, LLC, Class A Preferred Member Units2023-12-310001396440main:DTEEnterprisesLLCMember2023-12-310001396440Dynamic Communities, LLC, Secured Debt 12023-12-310001396440Dynamic Communities, LLC, Secured Debt 22023-12-310001396440Dynamic Communities, LLC, Preferred Equity 12023-12-310001396440Dynamic Communities, LLC, Preferred Equity 22023-12-310001396440Dynamic Communities, LLC, Common Equity2023-12-310001396440main:DynamicCommunitiesLLCMember2023-12-310001396440Eastern Wholesale Fence LLC, Secured Debt 12023-12-310001396440Eastern Wholesale Fence LLC, Secured Debt 22023-12-310001396440Eastern Wholesale Fence LLC, Secured Debt 32023-12-310001396440Eastern Wholesale Fence LLC, Secured Debt 42023-12-310001396440Eastern Wholesale Fence LLC, Secured Debt 52023-12-310001396440main:EasternWholesaleFenceLLCMember2023-12-310001396440Emerald Technologies Acquisition Co, Inc., Secured Debt2023-12-310001396440EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII, L.P.)2023-12-310001396440EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co-Investors, L.P.)2023-12-310001396440EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund IX, L.P.)2023-12-310001396440EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund X, L.P.)2023-12-310001396440EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund II, L.P.)2023-12-310001396440EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund III, L.P.)2023-12-310001396440main:EnCapEnergyFundInvestmentsMember2023-12-310001396440Engineering Research & Consulting, LLC, Secured Debt 12023-12-310001396440Engineering Research & Consulting, LLC, Secured Debt 22023-12-310001396440main:EngineeringResearchConsultingLLCMember2023-12-310001396440Escalent, Inc., Secured Debt 12023-12-310001396440Escalent, Inc., Secured Debt 22023-12-310001396440Escalent, Inc., Common Equity2023-12-310001396440main:EscalentIncMember2023-12-310001396440Event Holdco, LLC, Secured Debt 12023-12-310001396440Event Holdco, LLC, Secured Debt 22023-12-310001396440main:EventHoldcoLLCMember2023-12-310001396440Fuse, LLC, Secured Debt2023-12-310001396440Fuse, LLC, Common Stock2023-12-310001396440main:FuseLLCMember2023-12-310001396440Garyline, LLC, Secured Debt 12023-12-310001396440Garyline, LLC, Secured Debt 22023-12-310001396440Garyline, LLC, Common Equity2023-12-310001396440main:GarylineLLCMember2023-12-310001396440GS HVAM Intermediate, LLC, Secured Debt 12023-12-310001396440GS HVAM Intermediate, LLC, Secured Debt 22023-12-310001396440GS HVAM Intermediate, LLC, Secured Debt 32023-12-310001396440GS HVAM Intermediate, LLC, Secured Debt 42023-12-310001396440GS HVAM Intermediate, LLC, Secured Debt 52023-12-310001396440main:GSHVAMIntermediateLLCMember2023-12-310001396440GULF PACIFIC ACQUISITION, LLC, Secured Debt 12023-12-310001396440GULF PACIFIC ACQUISITION, LLC, Secured Debt 22023-12-310001396440GULF PACIFIC ACQUISITION, LLC, Secured Debt 32023-12-310001396440main:GULFPACIFICACQUISITIONLLCMember2023-12-310001396440HDC/HW Intermediate Holdings, Secured Debt 12023-12-310001396440HDC/HW Intermediate Holdings, Secured Debt 22023-12-310001396440main:HDCHWIntermediateHoldingsMember2023-12-310001396440HEADLANDS OP-CO LLC, Secured Debt 12023-12-310001396440HEADLANDS OP-CO LLC, Secured Debt 22023-12-310001396440HEADLANDS OP-CO LLC, Secured Debt 32023-12-310001396440main:HEADLANDSOPCOLLCMember2023-12-310001396440HOWLCO LLC, Secured Debt2023-12-310001396440Hybrid Promotions, LLC, Secured Debt2023-12-310001396440IG Parent Corporation, Secured Debt 12023-12-310001396440IG Parent Corporation, Secured Debt 22023-12-310001396440IG Parent Corporation, Secured Debt 32023-12-310001396440main:IGParentCorporationMember2023-12-310001396440Imaging Business Machines, L.L.C., Secured Debt 12023-12-310001396440Imaging Business Machines, L.L.C., Secured Debt 22023-12-310001396440Imaging Business Machines, L.L.C., Common Equity2023-12-310001396440main:ImagingBusinessMachinesLLCMember2023-12-310001396440Implus Footcare, LLC, Secured Debt2023-12-310001396440Industrial Services Acquisition, LLC, Secured Debt 12023-12-310001396440Industrial Services Acquisition, LLC, Secured Debt 22023-12-310001396440Industrial Services Acquisition, LLC, Preferred Member Units 12023-12-310001396440Industrial Services Acquisition, LLC, Preferred Member Units 22023-12-310001396440Industrial Services Acquisition, LLC, Member Units2023-12-310001396440main:IndustrialServicesAcquisitionLLCMember2023-12-310001396440Infolinks Media Buyco, LLC, Secured Debt 12023-12-310001396440Infolinks Media Buyco, LLC, Secured Debt 22023-12-310001396440main:InfolinksMediaBuycoLLCMember2023-12-310001396440Insight Borrower Corporation, Secured Debt 12023-12-310001396440Insight Borrower Corporation, Secured Debt 22023-12-310001396440Insight Borrower Corporation, Secured Debt 32023-12-310001396440Insight Borrower Corporation, Common Equity2023-12-310001396440main:InsightBorrowerCorporationMember2023-12-310001396440Inspire Aesthetics Management, LLC, Secured Debt 12023-12-310001396440Inspire Aesthetics Management, LLC, Secured Debt 22023-12-310001396440Inspire Aesthetics Management, LLC, Secured Debt 32023-12-310001396440Inspire Aesthetics Management, LLC, Common Equity2023-12-310001396440main:InspireAestheticsManagementLLCMember2023-12-310001396440Interface Security Systems, L.L.C, Secured Debt 12023-12-310001396440Interface Security Systems, L.L.C, Secured Debt 22023-12-310001396440Interface Security Systems, L.L.C, Common Stock2023-12-310001396440main:InterfaceSecuritySystemsLLCMember2023-12-310001396440Intermedia Holdings, Inc., Secured Debt2023-12-310001396440Invincible Boat Company, LLC., Secured Debt 12023-12-310001396440Invincible Boat Company, LLC., Secured Debt 22023-12-310001396440main:InvincibleBoatCompanyLLCMember2023-12-310001396440INW Manufacturing, LLC, Secured Debt2023-12-310001396440Isagenix International, LLC, Secured Debt2023-12-310001396440Isagenix International, LLC, Common Equity2023-12-310001396440main:IsagenixInternationalLLCMember2023-12-310001396440Jackmont Hospitality, Inc., Secured Debt 12023-12-310001396440Jackmont Hospitality, Inc., Secured Debt 22023-12-310001396440Jackmont Hospitality, Inc., Preferred Equity2023-12-310001396440main:JackmontHospitalityIncMember2023-12-310001396440Joerns Healthcare, LLC, Secured Debt 12023-12-310001396440Joerns Healthcare, LLC, Secured Debt 22023-12-310001396440Joerns Healthcare, LLC, Secured Debt 32023-12-310001396440Joerns Healthcare, LLC, Common Stock2023-12-310001396440main:JoernsHealthcareLLCMember2023-12-310001396440JTI Electrical & Mechanical, LLC, Secured Debt 12023-12-310001396440JTI Electrical & Mechanical, LLC, Secured Debt 22023-12-310001396440JTI Electrical & Mechanical, LLC, Common Equity2023-12-310001396440main:JTIElectricalMechanicalLLCMember2023-12-310001396440KMS, LLC, Secured Debt 12023-12-310001396440KMS, LLC, Secured Debt 22023-12-310001396440main:KMSLLCMember2023-12-310001396440Lightbox Holdings, L.P., Secured Debt2023-12-310001396440LKCM Headwater Investments I, L.P., LP Interests2023-12-310001396440LL Management, Inc., Secured Debt 12023-12-310001396440LL Management, Inc., Secured Debt 22023-12-310001396440LL Management, Inc., Secured Debt 32023-12-310001396440LL Management, Inc., Secured Debt 42023-12-310001396440LL Management, Inc., Secured Debt 52023-12-310001396440main:LLManagementIncMember2023-12-310001396440LLFlex, LLC, Secured Debt2023-12-310001396440Logix Acquisition Company, LLC, Secured Debt2023-12-310001396440Looking Glass Investments, LLC, Member Units2023-12-310001396440Mako Steel, LP, Secured Debt 12023-12-310001396440Mako Steel, LP, Secured Debt 22023-12-310001396440main:MakoSteelLPMember2023-12-310001396440MB2 Dental Solutions, LLC, Secured Debt 12023-12-310001396440MB2 Dental Solutions, LLC, Secured Debt 22023-12-310001396440MB2 Dental Solutions, LLC, Secured Debt 32023-12-310001396440MB2 Dental Solutions, LLC, Secured Debt 42023-12-310001396440main:MB2DentalSolutionsLLCMember2023-12-310001396440Microbe Formulas, LLC, Secured Debt 12023-12-310001396440Microbe Formulas, LLC, Secured Debt 22023-12-310001396440main:MicrobeFormulasLLCMember2023-12-310001396440Mills Fleet Farm Group, LLC, Secured Debt2023-12-310001396440Mini Melts of America, LLC, Secured Debt 12023-12-310001396440Mini Melts of America, LLC, Secured Debt 22023-12-310001396440Mini Melts of America, LLC, Secured Debt 32023-12-310001396440Mini Melts of America, LLC, Secured Debt 42023-12-310001396440Mini Melts of America, LLC, Common Equity2023-12-310001396440main:MiniMeltsOfAmericaLLCMember2023-12-310001396440MonitorUS Holding, LLC, Secured Debt 12023-12-310001396440MonitorUS Holding, LLC, Secured Debt 22023-12-310001396440MonitorUS Holding, LLC, Secured Debt 32023-12-310001396440MonitorUS Holding, LLC, Common Stock2023-12-310001396440main:MonitorUSHoldingLLCMember2023-12-310001396440NBG Acquisition Inc, Secured Debt2023-12-310001396440NinjaTrader, LLC, Secured Debt 12023-12-310001396440NinjaTrader, LLC, Secured Debt 22023-12-310001396440NinjaTrader, LLC, Secured Debt 32023-12-310001396440NinjaTrader, LLC, Secured Debt 42023-12-310001396440main:NinjaTraderLLCMember2023-12-310001396440Obra Capital, Inc. (f/k/a Vida Capital, Inc.), Secured Debt2023-12-310001396440Ospemifene Royalty Sub LLC, Secured Debt2023-12-310001396440Paragon Healthcare, Inc., Secured Debt 12023-12-310001396440Paragon Healthcare, Inc., Secured Debt 22023-12-310001396440Paragon Healthcare, Inc., Secured Debt 32023-12-310001396440main:ParagonHealthcareIncMember2023-12-310001396440Power System Solutions, Secured Debt 12023-12-310001396440Power System Solutions, Secured Debt 22023-12-310001396440Power System Solutions, Secured Debt 32023-12-310001396440Power System Solutions, Common Equity2023-12-310001396440main:PowerSystemSolutionsMember2023-12-310001396440PrimeFlight Aviation Services, Secured Debt 12023-12-310001396440PrimeFlight Aviation Services, Secured Debt 22023-12-310001396440main:PrimeFlightAviationServicesMember2023-12-310001396440PTL US Bidco, Inc, Secured Debt 12023-12-310001396440PTL US Bidco, Inc, Secured Debt 22023-12-310001396440main:PTLUSBidcoIncMember2023-12-310001396440Purge Rite, LLC, Secured Debt 12023-12-310001396440Purge Rite, LLC, Secured Debt 22023-12-310001396440Purge Rite, LLC, Preferred Equity2023-12-310001396440main:PurgeRiteLLCMember2023-12-310001396440RA Outdoors LLC, Secured Debt 12023-12-310001396440RA Outdoors LLC, Secured Debt 22023-12-310001396440main:RAOutdoorsLLCMember2023-12-310001396440Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt2023-12-310001396440Richardson Sales Solutions, Secured Debt 12023-12-310001396440Richardson Sales Solutions, Secured Debt 22023-12-310001396440main:RichardsonSalesSolutionsMember2023-12-310001396440Roof Opco, LLC, Secured Debt 12023-12-310001396440Roof Opco, LLC, Secured Debt 22023-12-310001396440Roof Opco, LLC, Secured Debt 32023-12-310001396440main:RoofOpcoLLCMember2023-12-310001396440RTIC Subsidiary Holdings, LLC, Secured Debt 12023-12-310001396440RTIC Subsidiary Holdings, LLC, Secured Debt 22023-12-310001396440RTIC Subsidiary Holdings, LLC, Secured Debt 32023-12-310001396440main:RTICSubsidiaryHoldingsLLCMember2023-12-310001396440Rug Doctor, LLC., Secured Debt 12023-12-310001396440Rug Doctor, LLC., Secured Debt 22023-12-310001396440main:RugDoctorLLCMember2023-12-310001396440South Coast Terminals Holdings, LLC, Secured Debt 12023-12-310001396440South Coast Terminals Holdings, LLC, Secured Debt 22023-12-310001396440South Coast Terminals Holdings, LLC, Common Equity2023-12-310001396440main:SouthCoastTerminalsHoldingsLLCMember2023-12-310001396440SPAU Holdings, LLC, Secured Debt 12023-12-310001396440SPAU Holdings, LLC, Secured Debt 22023-12-310001396440SPAU Holdings, LLC, Common Stock2023-12-310001396440main:SPAUHoldingsLLCMember2023-12-310001396440Stellant Systems, Inc., Secured Debt 12023-12-310001396440Stellant Systems, Inc., Secured Debt 22023-12-310001396440main:StellantSystemsInc.Member2023-12-310001396440Team Public Choices, LLC, Secured Debt2023-12-310001396440Tectonic Financial, LLC, Common Stock2023-12-310001396440Tex Tech Tennis, LLC, Preferred Equity2023-12-310001396440U.S. TelePacific Corp., Secured Debt 12023-12-310001396440U.S. TelePacific Corp., Secured Debt 22023-12-310001396440main:USTelePacificCorpMember2023-12-310001396440USA DeBusk LLC, Secured Debt 12023-12-310001396440USA DeBusk LLC, Secured Debt 22023-12-310001396440USA DeBusk LLC, Secured Debt 32023-12-310001396440main:USADebuskLLCMember2023-12-310001396440UserZoom Technologies, Inc., Secured Debt2023-12-310001396440Veregy Consolidated, Inc., Secured Debt 12023-12-310001396440Veregy Consolidated, Inc., Secured Debt 22023-12-310001396440main:VeregyConsolidatedIncMember2023-12-310001396440Vistar Media, Inc., Preferred Stock2023-12-310001396440Vitesse Systems, Secured Debt2023-12-310001396440VORTEQ Coil Finishers, LLC, Common Equity2023-12-310001396440Wall Street Prep, Inc., Secured Debt 12023-12-310001396440Wall Street Prep, Inc., Secured Debt 22023-12-310001396440Wall Street Prep, Inc., Common Stock2023-12-310001396440main:WallStreetPrepIncMember2023-12-310001396440Watterson Brands, LLC, Secured Debt 12023-12-310001396440Watterson Brands, LLC, Secured Debt 22023-12-310001396440Watterson Brands, LLC, Secured Debt 32023-12-310001396440Watterson Brands, LLC, Secured Debt 42023-12-310001396440main:WattersonBrandsLLCMember2023-12-310001396440West Star Aviation Acquisition, LLC, Secured Debt 12023-12-310001396440West Star Aviation Acquisition, LLC, Secured Debt 22023-12-310001396440West Star Aviation Acquisition, LLC, Secured Debt 32023-12-310001396440West Star Aviation Acquisition, LLC, Common Stock2023-12-310001396440main:WestStarAviationAcquisitionLLCMember2023-12-310001396440Winter Services LLC, Secured Debt 12023-12-310001396440Winter Services LLC, Secured Debt 22023-12-310001396440Winter Services LLC, Secured Debt 32023-12-310001396440main:WinterServicesLLCMember2023-12-310001396440Xenon Arc, Inc., Secured Debt 12023-12-310001396440Xenon Arc, Inc., Secured Debt 22023-12-310001396440Xenon Arc, Inc., Secured Debt 32023-12-310001396440main:XenonArcIncMember2023-12-310001396440YS Garments, LLC, Secured Debt2023-12-310001396440Zips Car Wash, LLC, Secured Debt 12023-12-310001396440Zips Car Wash, LLC, Secured Debt 22023-12-310001396440main:ZipsCarWashLLCMember2023-12-310001396440Dreyfus Government Cash Management2023-12-310001396440Fidelity Government Fund 2023-12-310001396440Fidelity Treasury2023-12-310001396440us-gaap:MoneyMarketFundsMember2023-12-310001396440srt:MinimumMembermain:LondonInterbankOfferedRateLIBOROrSecuredOvernightFinancingRateSOFRMember2023-12-310001396440srt:MaximumMembermain:LondonInterbankOfferedRateLIBOROrSecuredOvernightFinancingRateSOFRMember2023-12-310001396440srt:WeightedAverageMembermain:LondonInterbankOfferedRateLIBOROrSecuredOvernightFinancingRateSOFRMember2023-12-3100013964402023-01-012023-12-310001396440srt:MinimumMemberus-gaap:SecuredOvernightFinancingRateSofrMember2023-12-310001396440srt:MaximumMemberus-gaap:SecuredOvernightFinancingRateSofrMember2023-12-310001396440Acumera, Inc., Warrants2023-01-012023-12-310001396440Fidelity Government Fund2023-12-310001396440main:LowerMiddleMarketPortfolioMember2024-01-012024-06-300001396440main:LowerMiddleMarketPortfolioMember2023-04-012023-06-300001396440main:LowerMiddleMarketPortfolioMember2024-04-012024-06-300001396440main:LowerMiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-04-012024-06-300001396440main:LowerMiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-04-012023-06-300001396440main:LowerMiddleMarketPortfolioMember2023-07-012024-06-300001396440main:LowerMiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-07-012024-06-300001396440main:PrivateLoanPortfolioMember2024-01-012024-06-300001396440main:PrivateLoanPortfolioMember2024-04-012024-06-300001396440main:PrivateLoanPortfolioMember2023-04-012023-06-300001396440main:PrivateLoanPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-04-012024-06-300001396440main:PrivateLoanPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-04-012023-06-300001396440main:PrivateLoanPortfolioMember2023-07-012024-06-300001396440main:PrivateLoanPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-07-012024-06-300001396440main:MiddleMarketPortfolioMember2024-06-300001396440main:MiddleMarketPortfolioMember2023-12-310001396440us-gaap:OtherAggregatedInvestmentsMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440us-gaap:OtherAggregatedInvestmentsMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMemberus-gaap:NonperformingFinancingReceivableMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMemberus-gaap:NonperformingFinancingReceivableMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMemberus-gaap:NonperformingFinancingReceivableMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMemberus-gaap:NonperformingFinancingReceivableMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440us-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-01-012024-06-300001396440us-gaap:ShortTermInvestmentsMember2024-06-300001396440us-gaap:ShortTermInvestmentsMember2023-12-310001396440us-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:EquitySecuritiesMember2024-06-300001396440srt:MinimumMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputWeightedAverageCostOfCapitalMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440srt:MaximumMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputWeightedAverageCostOfCapitalMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440srt:WeightedAverageMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputWeightedAverageCostOfCapitalMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440srt:MedianMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputWeightedAverageCostOfCapitalMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440srt:MinimumMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputEbitdaMultipleMembermain:ValuationMarketAndEnterpriseValueApproachMember2024-06-300001396440srt:MaximumMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputEbitdaMultipleMembermain:ValuationMarketAndEnterpriseValueApproachMember2024-06-300001396440srt:WeightedAverageMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputEbitdaMultipleMembermain:ValuationMarketAndEnterpriseValueApproachMember2024-06-300001396440srt:MedianMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputEbitdaMultipleMembermain:ValuationMarketAndEnterpriseValueApproachMember2024-06-300001396440us-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:DebtSecuritiesMember2024-06-300001396440srt:MinimumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440srt:MaximumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440srt:WeightedAverageMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440srt:MedianMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440srt:MinimumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputExpectedPrincipalRecoveryPercentageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440srt:MaximumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputExpectedPrincipalRecoveryPercentageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440srt:WeightedAverageMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputExpectedPrincipalRecoveryPercentageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440srt:MedianMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputExpectedPrincipalRecoveryPercentageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2024-06-300001396440us-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:DebtSecuritiesMember2024-06-300001396440srt:MinimumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputThirdPartyQuoteMemberus-gaap:MarketApproachValuationTechniqueMember2024-06-300001396440srt:MaximumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputThirdPartyQuoteMemberus-gaap:MarketApproachValuationTechniqueMember2024-06-300001396440srt:WeightedAverageMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputThirdPartyQuoteMemberus-gaap:MarketApproachValuationTechniqueMember2024-06-300001396440srt:MedianMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputThirdPartyQuoteMemberus-gaap:MarketApproachValuationTechniqueMember2024-06-300001396440us-gaap:FairValueInputsLevel3Member2024-06-300001396440us-gaap:FairValueInputsLevel3Membermain:MeasurementInputEBITDAMultipleOutlierMembersrt:MinimumMember2024-06-300001396440us-gaap:FairValueInputsLevel3Membermain:MeasurementInputEBITDAMultipleOutlierMembersrt:MaximumMember2024-06-300001396440us-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorOutlierMembersrt:MinimumMember2024-06-300001396440us-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorOutlierMembersrt:MaximumMember2024-06-300001396440us-gaap:RelatedPartyMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputFeeMultipleMembermain:ValuationMarketAndEnterpriseValueApproachMembermain:ExternalInvestmentManagerMember2024-06-300001396440us-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:EquitySecuritiesMember2023-12-310001396440srt:MinimumMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputWeightedAverageCostOfCapitalMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440srt:MaximumMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputWeightedAverageCostOfCapitalMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440srt:WeightedAverageMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputWeightedAverageCostOfCapitalMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440srt:MedianMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputWeightedAverageCostOfCapitalMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440srt:MinimumMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputEbitdaMultipleMembermain:ValuationMarketAndEnterpriseValueApproachMember2023-12-310001396440srt:MaximumMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputEbitdaMultipleMembermain:ValuationMarketAndEnterpriseValueApproachMember2023-12-310001396440srt:WeightedAverageMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputEbitdaMultipleMembermain:ValuationMarketAndEnterpriseValueApproachMember2023-12-310001396440srt:MedianMemberus-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputEbitdaMultipleMembermain:ValuationMarketAndEnterpriseValueApproachMember2023-12-310001396440us-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMemberus-gaap:DebtSecuritiesMember2023-12-310001396440srt:MinimumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440srt:MaximumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440srt:WeightedAverageMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440srt:MedianMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440srt:MinimumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputExpectedPrincipalRecoveryPercentageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440srt:MaximumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputExpectedPrincipalRecoveryPercentageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440srt:WeightedAverageMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputExpectedPrincipalRecoveryPercentageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440srt:MedianMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputExpectedPrincipalRecoveryPercentageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-12-310001396440us-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:DebtSecuritiesMember2023-12-310001396440srt:MinimumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputThirdPartyQuoteMemberus-gaap:MarketApproachValuationTechniqueMember2023-12-310001396440srt:MaximumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputThirdPartyQuoteMemberus-gaap:MarketApproachValuationTechniqueMember2023-12-310001396440srt:WeightedAverageMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputThirdPartyQuoteMemberus-gaap:MarketApproachValuationTechniqueMember2023-12-310001396440srt:MedianMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputThirdPartyQuoteMemberus-gaap:MarketApproachValuationTechniqueMember2023-12-310001396440us-gaap:FairValueInputsLevel3Member2023-12-310001396440us-gaap:FairValueInputsLevel3Membermain:MeasurementInputEBITDAMultipleOutlierMembersrt:MinimumMember2023-12-310001396440us-gaap:FairValueInputsLevel3Membermain:MeasurementInputEBITDAMultipleOutlierMembersrt:MaximumMember2023-12-310001396440us-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorOutlierMembersrt:MinimumMember2023-12-310001396440us-gaap:FairValueInputsLevel3Membermain:MeasurementInputRiskAdjustedDiscountFactorOutlierMembersrt:MaximumMember2023-12-310001396440us-gaap:RelatedPartyMemberus-gaap:FairValueInputsLevel3Membermain:MeasurementInputFeeMultipleMembermain:ValuationMarketAndEnterpriseValueApproachMembermain:ExternalInvestmentManagerMember2023-12-310001396440us-gaap:DebtSecuritiesMember2023-12-310001396440us-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440main:DebtAndEquitySecuritiesRealizedGainLossMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440main:DebtAndEquitySecuritiesUnrealizedGainLossMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440us-gaap:DebtSecuritiesMember2024-06-300001396440us-gaap:EquitySecuritiesMember2023-12-310001396440us-gaap:EquitySecuritiesMember2024-01-012024-06-300001396440main:DebtAndEquitySecuritiesRealizedGainLossMemberus-gaap:EquitySecuritiesMember2024-01-012024-06-300001396440main:DebtAndEquitySecuritiesUnrealizedGainLossMemberus-gaap:EquitySecuritiesMember2024-01-012024-06-300001396440us-gaap:EquitySecuritiesMember2024-06-300001396440main:EquityWarrantMember2023-12-310001396440main:EquityWarrantMember2024-01-012024-06-300001396440main:DebtAndEquitySecuritiesRealizedGainLossMembermain:EquityWarrantMember2024-01-012024-06-300001396440main:DebtAndEquitySecuritiesUnrealizedGainLossMembermain:EquityWarrantMember2024-01-012024-06-300001396440main:EquityWarrantMember2024-06-300001396440us-gaap:InvestmentsMember2023-12-310001396440us-gaap:InvestmentsMember2024-01-012024-06-300001396440main:DebtAndEquitySecuritiesRealizedGainLossMemberus-gaap:InvestmentsMember2024-01-012024-06-300001396440main:DebtAndEquitySecuritiesUnrealizedGainLossMemberus-gaap:InvestmentsMember2024-01-012024-06-300001396440us-gaap:InvestmentsMember2024-06-300001396440us-gaap:DebtSecuritiesMember2022-12-310001396440us-gaap:DebtSecuritiesMember2023-01-012023-06-300001396440main:DebtAndEquitySecuritiesRealizedGainLossMemberus-gaap:DebtSecuritiesMember2023-01-012023-06-300001396440main:DebtAndEquitySecuritiesUnrealizedGainLossMemberus-gaap:DebtSecuritiesMember2023-01-012023-06-300001396440us-gaap:DebtSecuritiesMember2023-06-300001396440us-gaap:EquitySecuritiesMember2022-12-310001396440us-gaap:EquitySecuritiesMember2023-01-012023-06-300001396440main:DebtAndEquitySecuritiesRealizedGainLossMemberus-gaap:EquitySecuritiesMember2023-01-012023-06-300001396440main:DebtAndEquitySecuritiesUnrealizedGainLossMemberus-gaap:EquitySecuritiesMember2023-01-012023-06-300001396440us-gaap:EquitySecuritiesMember2023-06-300001396440main:EquityWarrantMember2022-12-310001396440main:EquityWarrantMember2023-01-012023-06-300001396440main:DebtAndEquitySecuritiesRealizedGainLossMembermain:EquityWarrantMember2023-01-012023-06-300001396440main:DebtAndEquitySecuritiesUnrealizedGainLossMembermain:EquityWarrantMember2023-01-012023-06-300001396440main:EquityWarrantMember2023-06-300001396440us-gaap:InvestmentsMember2022-12-310001396440us-gaap:InvestmentsMember2023-01-012023-06-300001396440main:DebtAndEquitySecuritiesRealizedGainLossMemberus-gaap:InvestmentsMember2023-01-012023-06-300001396440main:DebtAndEquitySecuritiesUnrealizedGainLossMemberus-gaap:InvestmentsMember2023-01-012023-06-300001396440us-gaap:InvestmentsMember2023-06-300001396440us-gaap:FairValueMeasurementsRecurringMembermain:LowerMiddleMarketPortfolioMember2024-06-300001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMembermain:LowerMiddleMarketPortfolioMember2024-06-300001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMembermain:LowerMiddleMarketPortfolioMember2024-06-300001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMembermain:LowerMiddleMarketPortfolioMember2024-06-300001396440us-gaap:FairValueMeasurementsRecurringMembermain:PrivateLoanPortfolioMember2024-06-300001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMembermain:PrivateLoanPortfolioMember2024-06-300001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMembermain:PrivateLoanPortfolioMember2024-06-300001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMembermain:PrivateLoanPortfolioMember2024-06-300001396440us-gaap:FairValueMeasurementsRecurringMembermain:MiddleMarketPortfolioMember2024-06-300001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMembermain:MiddleMarketPortfolioMember2024-06-300001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMembermain:MiddleMarketPortfolioMember2024-06-300001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMembermain:MiddleMarketPortfolioMember2024-06-300001396440us-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherAggregatedInvestmentsMember2024-06-300001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherAggregatedInvestmentsMember2024-06-300001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherAggregatedInvestmentsMember2024-06-300001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherAggregatedInvestmentsMember2024-06-300001396440us-gaap:FairValueMeasurementsRecurringMembermain:ExternalInvestmentManagerInvestmentsMember2024-06-300001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMembermain:ExternalInvestmentManagerInvestmentsMember2024-06-300001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMembermain:ExternalInvestmentManagerInvestmentsMember2024-06-300001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMembermain:ExternalInvestmentManagerInvestmentsMember2024-06-300001396440us-gaap:FairValueMeasurementsRecurringMember2024-06-300001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2024-06-300001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2024-06-300001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2024-06-300001396440us-gaap:FairValueMeasurementsRecurringMembermain:LowerMiddleMarketPortfolioMember2023-12-310001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMembermain:LowerMiddleMarketPortfolioMember2023-12-310001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMembermain:LowerMiddleMarketPortfolioMember2023-12-310001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMembermain:LowerMiddleMarketPortfolioMember2023-12-310001396440us-gaap:FairValueMeasurementsRecurringMembermain:PrivateLoanPortfolioMember2023-12-310001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMembermain:PrivateLoanPortfolioMember2023-12-310001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMembermain:PrivateLoanPortfolioMember2023-12-310001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMembermain:PrivateLoanPortfolioMember2023-12-310001396440us-gaap:FairValueMeasurementsRecurringMembermain:MiddleMarketPortfolioMember2023-12-310001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMembermain:MiddleMarketPortfolioMember2023-12-310001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMembermain:MiddleMarketPortfolioMember2023-12-310001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMembermain:MiddleMarketPortfolioMember2023-12-310001396440us-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherAggregatedInvestmentsMember2023-12-310001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherAggregatedInvestmentsMember2023-12-310001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherAggregatedInvestmentsMember2023-12-310001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherAggregatedInvestmentsMember2023-12-310001396440us-gaap:FairValueMeasurementsRecurringMembermain:ExternalInvestmentManagerInvestmentsMember2023-12-310001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMembermain:ExternalInvestmentManagerInvestmentsMember2023-12-310001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMembermain:ExternalInvestmentManagerInvestmentsMember2023-12-310001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMembermain:ExternalInvestmentManagerInvestmentsMember2023-12-310001396440us-gaap:FairValueMeasurementsRecurringMember2023-12-310001396440us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001396440us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001396440us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-12-310001396440srt:MinimumMembermain:LowerMiddleMarketPortfolioMember2024-01-012024-06-300001396440srt:MaximumMembermain:LowerMiddleMarketPortfolioMember2024-01-012024-06-300001396440srt:MinimumMembermain:LowerMiddleMarketPortfolioMember2024-06-300001396440srt:MaximumMembermain:LowerMiddleMarketPortfolioMember2024-06-300001396440main:LowerMiddleMarketPortfolioMembersrt:MinimumMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440main:LowerMiddleMarketPortfolioMembersrt:MaximumMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440srt:MinimumMembermain:PrivateLoanPortfolioMember2024-06-300001396440srt:MaximumMembermain:PrivateLoanPortfolioMember2024-06-300001396440main:PrivateLoanPortfolioMembersrt:MinimumMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440main:PrivateLoanPortfolioMembersrt:MaximumMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440srt:MinimumMembermain:MiddleMarketPortfolioMember2024-01-012024-06-300001396440srt:MaximumMembermain:MiddleMarketPortfolioMember2024-01-012024-06-300001396440srt:MinimumMembermain:MiddleMarketPortfolioMember2024-06-300001396440srt:MaximumMembermain:MiddleMarketPortfolioMember2024-06-300001396440main:MiddleMarketPortfolioMembersrt:MinimumMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440main:MiddleMarketPortfolioMembersrt:MaximumMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440us-gaap:OtherAggregatedInvestmentsMembersrt:MinimumMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440us-gaap:OtherAggregatedInvestmentsMembersrt:MaximumMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440us-gaap:ShortTermInvestmentsMembersrt:MaximumMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440srt:AffiliatedEntityMembermain:ExternalInvestmentManagerMember2024-04-012024-06-300001396440srt:AffiliatedEntityMembermain:ExternalInvestmentManagerMember2023-04-012023-06-300001396440srt:AffiliatedEntityMembermain:ExternalInvestmentManagerMember2024-01-012024-06-300001396440srt:AffiliatedEntityMembermain:ExternalInvestmentManagerMember2023-01-012023-06-300001396440main:LowerMiddleMarketPortfolioMember2024-06-300001396440main:PrivateLoanPortfolioMember2024-06-300001396440main:LowerMiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440main:PrivateLoanPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440main:MiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:DebtSecuritiesMember2024-01-012024-06-300001396440main:LowerMiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:EquitySecuritiesMember2024-01-012024-06-300001396440main:PrivateLoanPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:EquitySecuritiesMember2024-01-012024-06-300001396440main:MiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:EquitySecuritiesMember2024-01-012024-06-300001396440main:LowerMiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:DebtSecuritiesFirstLienMember2024-01-012024-06-300001396440main:PrivateLoanPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:DebtSecuritiesFirstLienMember2024-01-012024-06-300001396440main:MiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:DebtSecuritiesFirstLienMember2024-01-012024-06-300001396440us-gaap:NonperformingFinancingReceivableMembermain:LowerMiddleMarketPortfolioMember2024-06-300001396440us-gaap:NonperformingFinancingReceivableMembermain:PrivateLoanPortfolioMember2024-06-300001396440us-gaap:NonperformingFinancingReceivableMembermain:MiddleMarketPortfolioMember2024-06-300001396440main:MiddleMarketPortfolioMember2024-01-012024-06-300001396440main:LowerMiddleMarketPortfolioMember2023-12-310001396440main:PrivateLoanPortfolioMember2023-12-310001396440main:LowerMiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:DebtSecuritiesMember2023-01-012023-12-310001396440main:PrivateLoanPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:DebtSecuritiesMember2023-01-012023-12-310001396440main:MiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:DebtSecuritiesMember2023-01-012023-12-310001396440main:LowerMiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:EquitySecuritiesMember2023-01-012023-12-310001396440main:PrivateLoanPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:EquitySecuritiesMember2023-01-012023-12-310001396440main:MiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:EquitySecuritiesMember2023-01-012023-12-310001396440main:LowerMiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:DebtSecuritiesFirstLienMember2023-01-012023-12-310001396440main:PrivateLoanPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:DebtSecuritiesFirstLienMember2023-01-012023-12-310001396440main:MiddleMarketPortfolioMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:DebtSecuritiesFirstLienMember2023-01-012023-12-310001396440us-gaap:NonperformingFinancingReceivableMembermain:LowerMiddleMarketPortfolioMember2023-12-310001396440us-gaap:NonperformingFinancingReceivableMembermain:PrivateLoanPortfolioMember2023-12-310001396440us-gaap:NonperformingFinancingReceivableMembermain:MiddleMarketPortfolioMember2023-12-310001396440main:LowerMiddleMarketPortfolioMember2023-01-012023-12-310001396440main:PrivateLoanPortfolioMember2023-01-012023-12-310001396440us-gaap:OtherAggregatedInvestmentsMember2024-06-300001396440us-gaap:OtherAggregatedInvestmentsMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440us-gaap:OtherAggregatedInvestmentsMember2023-12-310001396440us-gaap:OtherAggregatedInvestmentsMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:ExternalInvestmentManagerInvestmentsMember2024-06-300001396440main:ExternalInvestmentManagerInvestmentsMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:ExternalInvestmentManagerInvestmentsMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:ExternalInvestmentManagerInvestmentsMember2023-12-310001396440main:ExternalInvestmentManagerInvestmentsMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:ExternalInvestmentManagerInvestmentsMembermain:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:DebtSecuritiesFirstLienMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:DebtSecuritiesFirstLienMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:EquitySecuritiesMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:EquitySecuritiesMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:DebtSecuritiesSecondLienMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:DebtSecuritiesSecondLienMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:EquityWarrantMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMembermain:EquityWarrantMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:OtherAggregatedInvestmentsMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMemberus-gaap:OtherAggregatedInvestmentsMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMembermain:DebtSecuritiesFirstLienMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMembermain:DebtSecuritiesFirstLienMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMemberus-gaap:EquitySecuritiesMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMemberus-gaap:EquitySecuritiesMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMembermain:DebtSecuritiesSecondLienMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMembermain:DebtSecuritiesSecondLienMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMembermain:EquityWarrantMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMembermain:EquityWarrantMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMemberus-gaap:OtherAggregatedInvestmentsMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMemberus-gaap:OtherAggregatedInvestmentsMember2023-01-012023-12-310001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:InvestmentTypeConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440us-gaap:WestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440us-gaap:WestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440us-gaap:NortheastRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440us-gaap:NortheastRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440us-gaap:MidwestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440us-gaap:MidwestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440us-gaap:SouthwestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440us-gaap:SouthwestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440us-gaap:SoutheastRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440us-gaap:SoutheastRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440country:CAus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440country:CAus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440us-gaap:NonUsMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440us-gaap:NonUsMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440us-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440us-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440us-gaap:WestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440us-gaap:WestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440us-gaap:MidwestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440us-gaap:MidwestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440us-gaap:NortheastRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440us-gaap:NortheastRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440us-gaap:SouthwestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440us-gaap:SouthwestRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440us-gaap:SoutheastRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440us-gaap:SoutheastRegionMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440country:CAus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440country:CAus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440us-gaap:NonUsMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440us-gaap:NonUsMemberus-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440us-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440us-gaap:GeographicConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:ProfessionalServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:ProfessionalServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:MachineryMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:MachineryMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:InternetSoftwareAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:InternetSoftwareAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:ElectricalEquipmentMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:ElectricalEquipmentMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:HealthCareProvidersAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:HealthCareProvidersAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:CommercialServicesAndSuppliesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:CommercialServicesAndSuppliesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:DiversifiedConsumerServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:DiversifiedConsumerServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:AutoComponentsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:AutoComponentsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:DistributorsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:DistributorsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:ConstructionAndEngineeringMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:ConstructionAndEngineeringMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:ITServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:ITServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:ContainersAndPackagingMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:ContainersAndPackagingMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:EnergyEquipmentAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:EnergyEquipmentAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:TobaccoMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:TobaccoMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:TextilesApparelAndLuxuryGoodsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:TextilesApparelAndLuxuryGoodsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:AerospaceAndDefenseMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:AerospaceAndDefenseMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:LeisureEquipmentAndProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:LeisureEquipmentAndProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:SpecialtyRetailMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:SpecialtyRetailMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:ComputersAndPeripheralsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:ComputersAndPeripheralsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:SoftwareMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:SoftwareMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:DiversifiedFinancialServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:DiversifiedFinancialServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:MediaMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:MediaMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:BuildingProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:BuildingProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:FoodProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:FoodProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:FoodAndStaplesRetailingMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:FoodAndStaplesRetailingMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:ElectronicEquipmentInstrumentsAndComponentsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:ElectronicEquipmentInstrumentsAndComponentsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:HealthCareEquipmentAndSuppliesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:HealthCareEquipmentAndSuppliesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:InternetAndCatalogRetailMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:InternetAndCatalogRetailMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:CommunicationsEquipmentMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:CommunicationsEquipmentMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:HotelsRestaurantsAndLeisureMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:HotelsRestaurantsAndLeisureMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:ChemicalsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:ChemicalsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:HouseholdProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:HouseholdProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:OtherMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:OtherMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2024-01-012024-06-300001396440main:IndustryConcentrationRiskMembermain:InvestmentOwnedAtCostMember2023-01-012023-12-310001396440main:MachineryMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:MachineryMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:ProfessionalServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:ProfessionalServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:DiversifiedConsumerServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:DiversifiedConsumerServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:InternetSoftwareAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:InternetSoftwareAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:ElectricalEquipmentMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:ElectricalEquipmentMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:HealthCareProvidersAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:HealthCareProvidersAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:ConstructionAndEngineeringMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:ConstructionAndEngineeringMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:DistributorsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:DistributorsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:ComputersAndPeripheralsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:ComputersAndPeripheralsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:CommercialServicesAndSuppliesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:CommercialServicesAndSuppliesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:ContainersAndPackagingMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:ContainersAndPackagingMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:ITServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:ITServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:AutoComponentsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:AutoComponentsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:EnergyEquipmentAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:EnergyEquipmentAndServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:TobaccoMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:TobaccoMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:SpecialtyRetailMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:SpecialtyRetailMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:AerospaceAndDefenseMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:AerospaceAndDefenseMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:MediaMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:MediaMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:SoftwareMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:SoftwareMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:TextilesApparelAndLuxuryGoodsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:TextilesApparelAndLuxuryGoodsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:LeisureEquipmentAndProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:LeisureEquipmentAndProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:DiversifiedFinancialServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:DiversifiedFinancialServicesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:FoodProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:FoodProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:BuildingProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:BuildingProductsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:FoodAndStaplesRetailingMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:FoodAndStaplesRetailingMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:AirFreightAndLogisticsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:AirFreightAndLogisticsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:InternetAndCatalogRetailMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:InternetAndCatalogRetailMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:ConstructionMaterialsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:ConstructionMaterialsMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:HealthCareEquipmentAndSuppliesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:HealthCareEquipmentAndSuppliesMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:OtherMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:OtherMembermain:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2024-01-012024-06-300001396440main:IndustryConcentrationRiskMembermain:InvestmentOwnedAtFairValueMember2023-01-012023-12-310001396440main:ExternalInvestmentManagerMembersrt:AffiliatedEntityMembermain:AdvisoryAgreementMember2024-01-012024-06-300001396440main:ExternalInvestmentManagerMember2024-04-012024-06-300001396440main:ExternalInvestmentManagerMember2023-04-012023-06-300001396440main:ExternalInvestmentManagerMember2024-01-012024-06-300001396440main:ExternalInvestmentManagerMember2023-01-012023-06-300001396440main:ExternalInvestmentManagerMember2024-06-300001396440main:ExternalInvestmentManagerMember2023-12-310001396440main:ExternalInvestmentManagerMemberus-gaap:ManagementServiceBaseMember2024-04-012024-06-300001396440main:ExternalInvestmentManagerMemberus-gaap:ManagementServiceBaseMember2023-04-012023-06-300001396440main:ExternalInvestmentManagerMemberus-gaap:ManagementServiceBaseMember2024-01-012024-06-300001396440main:ExternalInvestmentManagerMemberus-gaap:ManagementServiceBaseMember2023-01-012023-06-300001396440main:ExternalInvestmentManagerMemberus-gaap:ManagementServiceIncentiveMember2024-04-012024-06-300001396440main:ExternalInvestmentManagerMemberus-gaap:ManagementServiceIncentiveMember2023-04-012023-06-300001396440main:ExternalInvestmentManagerMemberus-gaap:ManagementServiceIncentiveMember2024-01-012024-06-300001396440main:ExternalInvestmentManagerMemberus-gaap:ManagementServiceIncentiveMember2023-01-012023-06-300001396440main:ExternalInvestmentManagerMemberus-gaap:AdministrativeServiceMember2024-04-012024-06-300001396440main:ExternalInvestmentManagerMemberus-gaap:AdministrativeServiceMember2023-04-012023-06-300001396440main:ExternalInvestmentManagerMemberus-gaap:AdministrativeServiceMember2024-01-012024-06-300001396440main:ExternalInvestmentManagerMemberus-gaap:AdministrativeServiceMember2023-01-012023-06-300001396440main:CorporateFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-06-300001396440main:CorporateFacilityMember2024-01-012024-06-300001396440main:SPVFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-06-300001396440main:SPVFacilityMember2024-01-012024-06-300001396440main:July2026NotesMember2024-01-012024-06-300001396440main:CorporateFacilityMember2023-01-012023-12-310001396440main:CorporateFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2023-12-310001396440main:SPVFacilityMember2023-01-012023-12-310001396440main:SPVFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2023-12-310001396440main:July2026NotesMember2023-01-012023-12-310001396440main:May2024NotesMember2023-01-012023-12-310001396440main:SBICDebenturesMember2023-01-012023-12-310001396440main:December2025NotesMember2023-01-012023-12-310001396440main:CorporateFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-04-012024-06-300001396440main:CorporateFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2023-04-012023-06-300001396440main:CorporateFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-01-012024-06-300001396440main:CorporateFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2023-01-012023-06-300001396440main:SPVFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-04-012024-06-300001396440main:SPVFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2023-04-012023-06-300001396440main:SPVFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-01-012024-06-300001396440main:SPVFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2023-01-012023-06-300001396440main:July2026NotesMemberus-gaap:UnsecuredDebtMember2024-04-012024-06-300001396440main:July2026NotesMemberus-gaap:UnsecuredDebtMember2023-04-012023-06-300001396440main:July2026NotesMemberus-gaap:UnsecuredDebtMember2024-01-012024-06-300001396440main:July2026NotesMemberus-gaap:UnsecuredDebtMember2023-01-012023-06-300001396440main:May2024NotesMemberus-gaap:UnsecuredDebtMember2024-04-012024-06-300001396440main:May2024NotesMemberus-gaap:UnsecuredDebtMember2023-04-012023-06-300001396440main:May2024NotesMemberus-gaap:UnsecuredDebtMember2024-01-012024-06-300001396440main:May2024NotesMemberus-gaap:UnsecuredDebtMember2023-01-012023-06-300001396440main:March2029NotesMemberus-gaap:UnsecuredDebtMember2024-04-012024-06-300001396440main:March2029NotesMemberus-gaap:UnsecuredDebtMember2023-04-012023-06-300001396440main:March2029NotesMemberus-gaap:UnsecuredDebtMember2024-01-012024-06-300001396440main:March2029NotesMemberus-gaap:UnsecuredDebtMember2023-01-012023-06-300001396440main:June2027NotesMemberus-gaap:UnsecuredDebtMember2024-04-012024-06-300001396440main:June2027NotesMemberus-gaap:UnsecuredDebtMember2023-04-012023-06-300001396440main:June2027NotesMemberus-gaap:UnsecuredDebtMember2024-01-012024-06-300001396440main:June2027NotesMemberus-gaap:UnsecuredDebtMember2023-01-012023-06-300001396440main:SBICDebenturesMemberus-gaap:UnsecuredDebtMember2024-04-012024-06-300001396440main:SBICDebenturesMemberus-gaap:UnsecuredDebtMember2023-04-012023-06-300001396440main:SBICDebenturesMemberus-gaap:UnsecuredDebtMember2024-01-012024-06-300001396440main:SBICDebenturesMemberus-gaap:UnsecuredDebtMember2023-01-012023-06-300001396440main:December2025NotesMemberus-gaap:UnsecuredDebtMember2024-04-012024-06-300001396440main:December2025NotesMemberus-gaap:UnsecuredDebtMember2023-04-012023-06-300001396440main:December2025NotesMemberus-gaap:UnsecuredDebtMember2024-01-012024-06-300001396440main:December2025NotesMemberus-gaap:UnsecuredDebtMember2023-01-012023-06-300001396440main:CorporateFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-05-310001396440main:CorporateFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-05-312024-05-310001396440main:CorporateFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-06-012024-06-300001396440main:CorporateFacilityJune2028AndJune2029Memberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-06-300001396440main:CorporateFacilityAugust2026AndAugust2027Memberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-06-300001396440main:CorporateFacilityMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMemberus-gaap:SecuredOvernightFinancingRateSofrMember2024-01-012024-06-300001396440main:CorporateFacilityMembermain:VariableRateComponentOneMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMemberus-gaap:SecuredOvernightFinancingRateSofrMembersrt:MinimumMember2024-01-012024-06-300001396440main:CorporateFacilityMembermain:VariableRateComponentOneMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMemberus-gaap:PrimeRateMembersrt:MinimumMember2024-01-012024-06-300001396440main:CorporateFacilityMembermain:VariableRateComponentTwoMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMembersrt:MaximumMember2024-01-012024-06-300001396440main:CorporateFacilityMembermain:VariableRateComponentTwoMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMemberus-gaap:PrimeRateMembersrt:MaximumMember2024-01-012024-06-300001396440main:SPVFacilityMembermain:MSCCFundingILLCMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-06-300001396440main:SPVFacilityMembermain:MSCCFundingILLCMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-01-012024-06-300001396440main:SPVFacilityMembermain:MSCCFundingILLCMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMembermain:MarginEffectivePeriodOneMember2024-01-012024-06-300001396440main:SPVFacilityMembermain:MSCCFundingILLCMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMembermain:MarginEffectivePeriodTwoMember2024-01-012024-06-300001396440main:SPVFacilityMembermain:MSCCFundingILLCMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMembermain:MarginEffectivePeriodThreeMember2024-01-012024-06-300001396440main:SPVFacilityMembermain:MSCCFundingILLCMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMembersrt:MinimumMember2024-01-012024-06-300001396440main:SPVFacilityMembermain:MSCCFundingILLCMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMembersrt:MaximumMember2024-01-012024-06-300001396440main:MSCCFundingILLCMember2024-04-012024-06-300001396440main:MSCCFundingILLCMember2023-04-012023-06-300001396440main:MSCCFundingILLCMember2024-01-012024-06-300001396440main:MSCCFundingILLCMember2023-01-012023-06-300001396440us-gaap:InvestmentUnaffiliatedIssuerMembermain:MSCCFundingILLCMember2024-06-300001396440us-gaap:InvestmentUnaffiliatedIssuerMembermain:MSCCFundingILLCMember2023-12-310001396440main:MSCCFundingILLCMember2024-06-300001396440main:MSCCFundingILLCMember2023-12-310001396440us-gaap:InvestmentUnaffiliatedIssuerMembermain:MSCCFundingILLCMember2024-04-012024-06-300001396440us-gaap:InvestmentUnaffiliatedIssuerMembermain:MSCCFundingILLCMember2023-04-012023-06-300001396440us-gaap:InvestmentUnaffiliatedIssuerMembermain:MSCCFundingILLCMember2024-01-012024-06-300001396440us-gaap:InvestmentUnaffiliatedIssuerMembermain:MSCCFundingILLCMember2023-01-012023-06-300001396440main:July2026NotesMemberus-gaap:UnsecuredDebtMember2021-01-310001396440main:July2026NotesMemberus-gaap:UnsecuredDebtMember2021-01-012021-01-310001396440main:July2026NotesMemberus-gaap:UnsecuredDebtMember2021-10-310001396440main:July2026NotesMemberus-gaap:UnsecuredDebtMember2021-10-012021-10-310001396440main:March2029NotesMemberus-gaap:UnsecuredDebtMember2024-01-310001396440main:March2029NotesMemberus-gaap:UnsecuredDebtMember2024-01-012024-01-310001396440main:June2027NotesMemberus-gaap:UnsecuredDebtMember2024-06-012024-06-300001396440main:SBICDebenturesMemberus-gaap:UnsecuredDebtMembersrt:MaximumMember2024-06-300001396440main:SBICDebenturesMemberus-gaap:UnsecuredDebtMember2024-03-012024-03-010001396440main:SBICDebenturesMembermain:MainStreetMezzanineFundLPMemberus-gaap:UnsecuredDebtMember2024-06-300001396440main:SBICDebenturesMembermain:MainStreetCapitalIIILPMemberus-gaap:UnsecuredDebtMember2024-06-300001396440main:December2025SeriesANotesMemberus-gaap:UnsecuredDebtMember2022-12-310001396440main:December2025SeriesBNotesMemberus-gaap:UnsecuredDebtMember2023-02-280001396440main:December2025NotesMemberus-gaap:UnsecuredDebtMembersrt:MinimumMember2022-12-310001396440main:December2025NotesMemberus-gaap:UnsecuredDebtMembersrt:MaximumMember2022-12-310001396440main:December2025NotesMemberus-gaap:UnsecuredDebtMember2022-12-310001396440main:May2024NotesMemberus-gaap:UnsecuredDebtMember2024-05-012024-05-310001396440main:May2024NotesMemberus-gaap:UnsecuredDebtMember2024-05-310001396440us-gaap:RelatedPartyMembermain:ExternalInvestmentManagerMember2024-01-012024-06-300001396440us-gaap:RelatedPartyMembermain:ExternalInvestmentManagerMember2023-01-012023-06-300001396440main:AtTheMarketOfferingsMember2024-01-012024-06-300001396440main:AtTheMarketOfferingsMembersrt:WeightedAverageMember2024-06-300001396440main:AtTheMarketOfferingsMember2024-06-300001396440main:AtTheMarketOfferingsMember2023-01-012023-12-310001396440main:AtTheMarketOfferingsMembersrt:WeightedAverageMember2023-12-310001396440main:MainStreetCapitalCorporation2022EquityAndIncentivePlanMemberus-gaap:RestrictedStockMembersrt:MinimumMember2024-01-012024-06-300001396440main:MainStreetCapitalCorporation2022EquityAndIncentivePlanMemberus-gaap:RestrictedStockMembersrt:MaximumMember2024-01-012024-06-300001396440us-gaap:RestrictedStockMembermain:MainStreetCapitalCorporation2022EquityAndIncentivePlanMember2024-06-300001396440us-gaap:RestrictedStockMembermain:MainStreetCapitalCorporation2022EquityAndIncentivePlanMember2024-01-012024-06-300001396440main:MainStreetCapitalCorporation2022NonEmployeeDirectorRestrictedStockPlanMemberus-gaap:RestrictedStockMembersrt:DirectorMember2024-06-300001396440main:MainStreetCapitalCorporation2022NonEmployeeDirectorRestrictedStockPlanMemberus-gaap:RestrictedStockMembersrt:DirectorMember2024-01-012024-06-300001396440us-gaap:RestrictedStockMember2024-04-012024-06-300001396440us-gaap:RestrictedStockMember2023-04-012023-06-300001396440us-gaap:RestrictedStockMember2024-01-012024-06-300001396440us-gaap:RestrictedStockMember2023-01-012023-06-300001396440us-gaap:RestrictedStockMember2023-12-310001396440us-gaap:RestrictedStockMember2024-06-300001396440us-gaap:RestrictedStockMembersrt:MinimumMember2024-01-012024-06-300001396440us-gaap:RestrictedStockMembersrt:MaximumMember2024-01-012024-06-300001396440Brightwood Capital Fund V, LP2024-06-300001396440Brightwood Capital Fund III, LP2024-06-300001396440main:BrightwoodCapitalFundInvestmentsMemberus-gaap:EquitySecuritiesMember2024-06-300001396440EnCap Equity - Fund XII, LP2024-06-300001396440HPEP 4, L.P.2024-06-300001396440HPEP 3, L.P.2024-06-300001396440main:HarrisPrestonFundInvestmentsMemberus-gaap:EquitySecuritiesMember2024-06-300001396440MS Private Loan Fund I, LP2024-06-300001396440MS Private Loan Fund II, LP2024-06-300001396440UnionRock Energy Fund III, LP2024-06-300001396440UnionRock Energy Fund II, LP2024-06-300001396440main:UnionRockEnergyFundInvestmentsMemberus-gaap:EquitySecuritiesMember2024-06-300001396440us-gaap:EquitySecuritiesMember2024-06-300001396440ZRG Partners, LLC2024-06-300001396440HEADLANDS OP-CO LLC2024-06-300001396440Creative Foam Corporation2024-06-300001396440Computer Data Source, LLC2024-06-300001396440CQ Fluency, LLC2024-06-300001396440Insight Borrower Corporation2024-06-300001396440JDC Power Services, LLC2024-06-300001396440Garyline, LLC2024-06-300001396440California Splendor Holdings LLC2024-06-300001396440Veregy Consolidated, Inc.2024-06-300001396440SI East, LLC2024-06-300001396440Gulf Manufacturing, LLC2024-06-300001396440PTL US Bidco, Inc2024-06-300001396440South Coast Terminals Holdings, LLC2024-06-300001396440BP Loenbro Holdings Inc.2024-06-300001396440Cody Pools, Inc.2024-06-300001396440Bettercloud, Inc.2024-06-300001396440IG Investor, LLC2024-06-300001396440AB Centers Acquisition Corporation2024-06-300001396440AVEX Aviation Holdings, LLC2024-06-300001396440Mako Steel, LP2024-06-300001396440Microbe Formulas, LLC2024-06-300001396440Johnson Downie Opco, LLC2024-06-300001396440Titan Meter Midco Corp.2024-06-300001396440Nello Industries Investco, LLC2024-06-300001396440VVS Holdco LLC2024-06-300001396440Watterson Brands, LLC2024-06-300001396440Coregistics Buyer LLC2024-06-300001396440Power System Solutions2024-06-300001396440MS Private Loan Fund2024-06-300001396440MetalForming AcquireCo, LLC2024-06-300001396440Winter Services LLC2024-06-300001396440IG Parent Corporation (Infogain)2024-06-300001396440NexRev LLC2024-06-30