0001496099FALSE--12-312022Q30.070422500014960992022-01-012022-09-3000014960992022-11-08xbrli:shares0001496099us-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-09-30iso4217:USD0001496099us-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-3100014960992022-09-3000014960992021-12-310001496099us-gaap:RevolvingCreditFacilityMembernmfc:HoldingsCreditFacilityMember2022-09-300001496099us-gaap:RevolvingCreditFacilityMembernmfc:HoldingsCreditFacilityMember2021-12-310001496099us-gaap:RevolvingCreditFacilityMembernmfc:DBCreditFacilityMember2022-09-300001496099us-gaap:RevolvingCreditFacilityMembernmfc:DBCreditFacilityMember2021-12-310001496099nmfc:NMFCCreditFacilityMemberus-gaap:RevolvingCreditFacilityMember2022-09-300001496099nmfc:NMFCCreditFacilityMemberus-gaap:RevolvingCreditFacilityMember2021-12-310001496099nmfc:NMNLCCreditFacilityIIMemberus-gaap:RevolvingCreditFacilityMember2022-09-300001496099nmfc:NMNLCCreditFacilityIIMemberus-gaap:RevolvingCreditFacilityMember2021-12-31iso4217:USDxbrli:shares0001496099us-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-07-012022-09-300001496099us-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-07-012021-09-300001496099us-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-01-012021-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2022-07-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2021-07-012021-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2021-01-012021-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-07-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-07-012021-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-09-3000014960992022-07-012022-09-3000014960992021-07-012021-09-3000014960992021-01-012021-09-300001496099us-gaap:NoncontrollingInterestMember2022-07-012022-09-300001496099us-gaap:NoncontrollingInterestMember2021-07-012021-09-300001496099us-gaap:NoncontrollingInterestMember2022-01-012022-09-300001496099us-gaap:NoncontrollingInterestMember2021-01-012021-09-300001496099us-gaap:ParentMember2022-07-012022-09-300001496099us-gaap:ParentMember2021-07-012021-09-300001496099us-gaap:ParentMember2022-01-012022-09-300001496099us-gaap:ParentMember2021-01-012021-09-300001496099us-gaap:ParentMember2022-06-300001496099us-gaap:ParentMember2021-06-300001496099us-gaap:ParentMember2021-12-310001496099us-gaap:ParentMember2020-12-310001496099us-gaap:ParentMember2022-09-300001496099us-gaap:ParentMember2021-09-300001496099us-gaap:NoncontrollingInterestMember2022-09-300001496099us-gaap:NoncontrollingInterestMember2021-09-3000014960992021-09-300001496099nmfc:HoldingsCreditFacilityMember2022-01-012022-09-300001496099nmfc:HoldingsCreditFacilityMember2021-01-012021-09-300001496099nmfc:NMFCCreditFacilityMember2022-01-012022-09-300001496099nmfc:NMFCCreditFacilityMember2021-01-012021-09-300001496099nmfc:DBCreditFacilityMember2022-01-012022-09-300001496099nmfc:DBCreditFacilityMember2021-01-012021-09-300001496099nmfc:NMNLCCreditFacilityIIMember2022-01-012022-09-300001496099nmfc:NMNLCCreditFacilityIIMember2021-01-012021-09-3000014960992020-12-310001496099GS Acquisitionco, Inc, First Lien 12022-09-30xbrli:pure0001496099GS Acquisitionco, Inc, First Lien 22022-09-300001496099GS Acquisitionco, Inc, First Lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:GSAcquisitioncoIncMember2022-09-300001496099PhyNet Dermatology LLC, First Lien 12022-09-300001496099PhyNet Dermatology LLC, First Lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:PhyNetDermatologyLLCMember2022-09-300001496099Kaseya Inc., First lien2022-09-300001496099Associations, Inc., First lien 12022-09-300001496099Associations, Inc., First lien 22022-09-300001496099Associations, Inc., First lien 32022-09-300001496099Associations, Inc., First lien 42022-09-300001496099Associations, Inc., First lien 52022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:AssociationsIncMember2022-09-300001496099AAH Topco, LLC, First Lien 12022-09-300001496099AAH Topco, LLC, First Lien 22022-09-300001496099AAH Topco, LLC, First Lien - Drawn 12022-09-300001496099AAH Topco, LLC, First Lien - Drawn 22022-09-300001496099AAH Topco, LLC, Subordinated 12022-09-300001496099AAH Topco, LLC, Subordinated 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:AAHTopcoLLCMember2022-09-300001496099GC Waves Holdings, Inc., First Lien 12022-09-300001496099GC Waves Holdings, Inc., First Lien 22022-09-300001496099GC Waves Holdings, Inc., First Lien 32022-09-300001496099GC Waves Holdings, Inc., First Lien - Drawn2022-09-300001496099nmfc:GCWavesHoldingsIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099CentralSquare Technologies, LLC, Second lien 12022-09-300001496099CentralSquare Technologies, LLC, Second lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:CentralSquareTechnologiesLLCMember2022-09-300001496099Infogain Corporation, First lien 12022-09-300001496099Infogain Corporation, First lien 22022-09-300001496099Infogain Corporation, First lien - Drawn2022-09-300001496099Infogain Corporation, First lien - Subordinated2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:InfogainCorporationMember2022-09-300001496099iCIMS, Inc., First lien2022-09-300001496099Brave Parent Holdings, Inc., Second lien 12022-09-300001496099Brave Parent Holdings, Inc., Second lien 22022-09-300001496099Brave Parent Holdings, Inc., Second lien 32022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:BraveParentHoldingsIncMember2022-09-300001496099Deca Dental Holdings LLC, First lien2022-09-300001496099Deca Dental Holdings LLC, First lien - Drawn 12022-09-300001496099Deca Dental Holdings LLC, First lien - Drawn 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:DecaDentalHoldingsLLCMember2022-09-300001496099Frontline Technologies Group Holdings, LLC, First Lien 12022-09-300001496099Frontline Technologies Group Holdings, LLC, First Lien 22022-09-300001496099Frontline Technologies Group Holdings, LLC, First Lien 32022-09-300001496099Frontline Technologies Group Holdings, LLC, First Lien 42022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:FrontlineTechnologiesGroupHoldingsLLCMember2022-09-300001496099Recorded Future, Inc., First lien 12022-09-300001496099Recorded Future, Inc., First lien 22022-09-300001496099nmfc:RecordedFutureIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099Auctane, Inc., First lien 12022-09-300001496099Auctane, Inc., First lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:AuctaneIncMember2022-09-300001496099Diligent Corporation, First lien 12022-09-300001496099Diligent Corporation, First lien 22022-09-300001496099Diligent Corporation, First lien 32022-09-300001496099Diligent Corporation, First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:DiligentCorporationMember2022-09-300001496099OEConnection LLC, Second lien 12022-09-300001496099OEConnection LLC, Second lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:OEConnectionLLCMember2022-09-300001496099IG Investments Holdings, LLC, First lien 12022-09-300001496099IG Investments Holdings, LLC, First lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:IGInvestmentsHoldingsLLCMember2022-09-300001496099nmfc:FundedDebtSecuritiesMemberAnaplan, Inc., First lien2022-09-300001496099KAMC Holdings, Inc, Second lien 12022-09-300001496099KAMC Holdings, Inc, Second lien 22022-09-300001496099nmfc:KAMCHoldingsIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099EAB Global, Inc., Second lien2022-09-300001496099MRI Software LLC, First lien 12022-09-300001496099MRI Software LLC, First lien 22022-09-300001496099MRI Software LLC, First lien 32022-09-300001496099MRI Software LLC, First lien 42022-09-300001496099MRI Software LLC, First lien 52022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:MRISoftwareLLCMember2022-09-300001496099Foreside Financial Group, First lien 12022-09-300001496099Foreside Financial Group, First lien 22022-09-300001496099nmfc:ForesideFinancialGroupMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099DCA Investment Holding, LLC, First lien 12022-09-300001496099DCA Investment Holding, LLC, First lien 22022-09-300001496099DCA Investment Holding, LLC, First lien 32022-09-300001496099DCA Investment Holding, LLC, First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:DCAInvestmentHoldingLLCMember2022-09-300001496099Granicus, Inc., First lien 12022-09-300001496099Granicus, Inc., First lien 22022-09-300001496099Granicus, Inc., First lien 32022-09-300001496099Granicus, Inc., First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:GranicusIncMember2022-09-300001496099TigerConnect, Inc., First lien2022-09-300001496099OA Buyer, Inc., First lien 12022-09-300001496099OA Buyer, Inc., First lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:OABuyerIncMember2022-09-300001496099Foundational Education Group, Inc., Second lien 12022-09-300001496099Foundational Education Group, Inc., Second lien 22022-09-300001496099nmfc:FoundationalEducationGroupIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099Fortis Solutions Group, LLC, First lien 12022-09-300001496099Fortis Solutions Group, LLC, First lien 22022-09-300001496099Fortis Solutions Group, LLC, First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:FortisSolutionsGroupLLCMember2022-09-300001496099Syndigo LLC, Second lien 12022-09-300001496099Syndigo LLC, Second lien 22022-09-300001496099nmfc:SyndigoLLCMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099HS Purchaser, LLC / Help/Systems Holdings, Inc., Second lien 12022-09-300001496099HS Purchaser, LLC / Help/Systems Holdings, Inc., Second lien 22022-09-300001496099nmfc:HSPurchaserLLCHelpSystemsHoldingsIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099VT Topco, Inc., Second lien 12022-09-300001496099VT Topco, Inc., Second lien 22022-09-300001496099nmfc:VTTopcoIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099DOCS, MSO, LLC, First lien 12022-09-300001496099DOCS, MSO, LLC, First lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:DOCSMSOLLCMember2022-09-300001496099CRCI Longhorn Holdings, Inc., Second lien 12022-09-300001496099CRCI Longhorn Holdings, Inc., Second lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:CRCILonghornHoldingsIncMember2022-09-300001496099Idera, Inc., Second lien 12022-09-300001496099Idera, Inc., Second lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:IderaIncMember2022-09-300001496099NMC Crimson Holdings, Inc., First lien 12022-09-300001496099NMC Crimson Holdings, Inc., First lien 22022-09-300001496099nmfc:NMCCrimsonHoldingsIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099nmfc:FundedDebtSecuritiesMemberAmeriVet Partners Management, Inc., First lien2022-09-300001496099nmfc:FundedDebtSecuritiesMemberAmeriVet Partners Management, Inc., First lien - Drawn 12022-09-300001496099AmeriVet Partners Management, Inc., First lien - Drawn 2nmfc:FundedDebtSecuritiesMember2022-09-300001496099nmfc:AmeriVetPartnersManagementIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099ACI Group Holdings, Inc., First lien2022-09-300001496099ACI Group Holdings, Inc., First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:ACIGroupHoldingsIncMember2022-09-300001496099Wealth Enhancement Group, LLC, First lien 12022-09-300001496099Wealth Enhancement Group, LLC, First lien 22022-09-300001496099Wealth Enhancement Group, LLC, First lien - Drawn2022-09-300001496099Wealth Enhancement Group, LLC, First lien 32022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:WealthEnhancementGroupLLCMember2022-09-300001496099Convey Health Solutions, Inc., First lien 12022-09-300001496099Convey Health Solutions, Inc., First lien 22022-09-300001496099nmfc:ConveyHealthSolutionsIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099Bullhorn, Inc., First lien 12022-09-300001496099Bullhorn, Inc., First lien 22022-09-300001496099Bullhorn, Inc., First lien 32022-09-300001496099Bullhorn, Inc., First lien - Drawn2022-09-300001496099Bullhorn, Inc., First lien 42022-09-300001496099Bullhorn, Inc., First lien 52022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:BullhornIncMember2022-09-300001496099Spring Education Group, Inc (fka SSH Group Holdings, Inc.), Second liennmfc:FundedDebtSecuritiesMember2022-09-300001496099Cardinal Parent, Inc., First lien2022-09-300001496099Cardinal Parent, Inc., Second lien2022-09-300001496099nmfc:CardinalParentIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099TMK Hawk Parent, Corp., First lien 12022-09-300001496099TMK Hawk Parent, Corp., First lien 22022-09-300001496099nmfc:TMKHawkParentCorpMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099Notorious Topco, LLC, First lien 12022-09-300001496099Notorious Topco, LLC, First lien 22022-09-300001496099Notorious Topco, LLC, First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:NotoriousTopcoLLCMember2022-09-300001496099YLG Holdings, Inc., First lien 12022-09-300001496099YLG Holdings, Inc., First lien 22022-09-300001496099YLG Holdings, Inc., First lien - Drawn 12022-09-300001496099YLG Holdings, Inc., First lien - Drawn 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:YLGHoldingsIncMember2022-09-300001496099American Achievement Corporation (aka AAC Holding Corp.), First lien 12022-09-300001496099American Achievement Corporation (aka AAC Holding Corp.), First lien 22022-09-300001496099American Achievement Corporation (aka AAC Holding Corp.), Subordinated2022-09-300001496099nmfc:AmericanAchievementCorporationAkaAACHoldingCorpMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099Xactly Corporation, First lien2022-09-300001496099Xactly Corporation, First lien - Drawn2022-09-300001496099nmfc:XactlyCorporationMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099Ansira Holdings, Inc., First lien 12022-09-300001496099Ansira Holdings, Inc., First lien 22022-09-300001496099nmfc:AnsiraHoldingsIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099New Trojan Parent, Inc., Second lien2022-09-300001496099DG Investment Intermediate Holdings 2, Inc., Second lien2022-09-300001496099Bluefin Holding, LLC, First lien - Drawn2022-09-300001496099Bluefin Holding, LLC, Second lien2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:BluefinHoldingLLCMember2022-09-300001496099MED Parentco, LP, Second lien2022-09-300001496099Trinity Air Consultants Holdings Corporation, First lien2022-09-300001496099Trinity Air Consultants Holdings Corporation, First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:TrinityAirConsultantsHoldingsCorporationMember2022-09-300001496099FS WhiteWater Borrower, LLC, First lien 12022-09-300001496099FS WhiteWater Borrower, LLC, First lien 22022-09-300001496099FS WhiteWater Borrower, LLC, First lien 32022-09-300001496099FS WhiteWater Borrower, LLC, First lien - Drawn 12022-09-300001496099FS WhiteWater Borrower, LLC, First lien - Drawn 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:FSWhiteWaterBorrowerLLCMember2022-09-300001496099The Kleinfelder Group, Inc., First lien2022-09-300001496099Coyote Buyer, LLC, First lien 12022-09-300001496099Coyote Buyer, LLC, First lien 22022-09-300001496099nmfc:CoyoteBuyerLLCMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099Pioneer Buyer I, LLC, First lien 12022-09-300001496099Pioneer Buyer I, LLC, First lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:PioneerBuyerILLCMember2022-09-300001496099Kele Holdco, Inc., First lien2022-09-300001496099Hill International, Inc., First lien2022-09-300001496099CFS Management, LLC, First lien 12022-09-300001496099CFS Management, LLC, First lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:CFSManagementLLCMember2022-09-300001496099Daxko Acquisition Corporation, First lien 12022-09-300001496099Daxko Acquisition Corporation, First lien 22022-09-300001496099nmfc:DaxkoAcquisitionCorporationMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099Castle Management Borrower LLC, First lien2022-09-300001496099Alegeus Technologies Holding Corp., First lien2022-09-300001496099Transcendia Holdings, Inc., Second lien2022-09-300001496099IMO Investor Holdings, Inc., First lien2022-09-300001496099IMO Investor Holdings, Inc., First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:IMOInvestorHoldingsIncMember2022-09-300001496099FR Arsenal Holdings II Corp., First lien2022-09-300001496099USRP Holdings, Inc., First lien 12022-09-300001496099USRP Holdings, Inc., First lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:USRPHoldingsIncMember2022-09-300001496099Calabrio, Inc., First lien2022-09-300001496099Apptio, Inc., First lien 12022-09-300001496099Apptio, Inc., First lien 22022-09-300001496099Apptio, Inc., First lien - Drawn2022-09-300001496099nmfc:ApptioIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099CHA Holdings, Inc., Second lien 12022-09-300001496099CHA Holdings, Inc., Second lien 22022-09-300001496099nmfc:CHAHoldingsIncMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099Specialtycare, Inc., First lien2022-09-300001496099Specialtycare, Inc., First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:SpecialtycareIncMember2022-09-300001496099Quartz Holding Company, Second lien2022-09-300001496099PPVA Black Elk (Equity) LLC, Subordinated2022-09-300001496099Vectra Co., Second lien2022-09-300001496099CG Group Holdings, LLC, First lien2022-09-300001496099CG Group Holdings, LLC, First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:CGGroupHoldingsLLCMember2022-09-300001496099KPSKY Acquisition Inc., First lien 12022-09-300001496099KPSKY Acquisition Inc., First lien 22022-09-300001496099KPSKY Acquisition Inc., First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:KPSKYAcquisitionIncMember2022-09-300001496099Energize Holdco LLC, Second lien2022-09-300001496099Community Brands ParentCo, LLC, First lien2022-09-300001496099Safety Borrower Holdings LLC, First lien2022-09-300001496099Safety Borrower Holdings LLC, First lien - Drawn2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:SafetyBorrowerHoldingsLLCMember2022-09-300001496099ADG, LLC, Second lien2022-09-300001496099Appriss Health, LLC, First lien2022-09-300001496099Sun Acquirer Corp., First lien2022-09-300001496099Sun Acquirer Corp., First lien - Drawn 12022-09-300001496099Sun Acquirer Corp., First lien - Drawn 22022-09-300001496099nmfc:SunAcquirerCorpMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099PPV Intermediate Holdings LLC, First lien - Drawn2022-09-300001496099PPV Intermediate Holdings LLC, First lien2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:PPVIntermediateHoldingsLLCMember2022-09-300001496099nmfc:FundedDebtSecuritiesMemberPye-Barker Fire & Safety, LLC, First lien2022-09-300001496099Pye-Barker Fire & Safety, LLC, First lien - Drawmnmfc:FundedDebtSecuritiesMember2022-09-300001496099nmfc:PyeBarkerFireSafetyLLCMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099Education Management II LLC, First lien 12022-09-300001496099Education Management II LLC, First lien 22022-09-300001496099Education Management II LLC, First lien 32022-09-300001496099Education Management II LLC, First lien 42022-09-300001496099Education Management II LLC, First lien 52022-09-300001496099Education Management II LLC, First lien 62022-09-300001496099Education Management II LLC, First lien 72022-09-300001496099Education Management II LLC, First lien 82022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:EducationManagementIILLCMember2022-09-300001496099PPVA Fund, L.P., Collateralized Financing2022-09-300001496099nmfc:FundedDebtSecuritiesMembercountry:USus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-09-300001496099Tahoe Finco, LLC, First lien 12022-09-300001496099Tahoe Finco, LLC, First lien 12022-09-300001496099Tahoe Finco, LLC, First lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:TahoeFincoLLCMember2022-09-300001496099country:NLnmfc:FundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-09-300001496099Aston FinCo S.a r.l. / Aston US Finco, LLC, Second lien2022-09-300001496099Integro Parent Inc., First lien 12022-09-300001496099Integro Parent Inc., First lien 22022-09-300001496099Integro Parent Inc., Second lien2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:IntegroParentIncMember2022-09-300001496099nmfc:FundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMembercountry:GB2022-09-300001496099Tennessee Bidco Limited, First lien 12022-09-30iso4217:GBP0001496099Tennessee Bidco Limited, First lien 22022-09-300001496099Tennessee Bidco Limited, First lien 32022-09-300001496099Tennessee Bidco Limited, First lien 42022-09-300001496099Tennessee Bidco Limited, First lien 52022-09-30iso4217:EUR0001496099nmfc:FundedDebtSecuritiesMembernmfc:TennesseeBidcoLimitedMember2022-09-300001496099nmfc:FundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMembercountry:JE2022-09-300001496099nmfc:FundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-09-300001496099Dealer Tire Holdings, LLC, Preferred shares2022-09-300001496099Symplr Software Intermediate Holdings, Inc., Preferred Shares 12022-09-300001496099Symplr Software Intermediate Holdings, Inc., Preferred Shares 22022-09-300001496099nmfc:SymplrSoftwareIntermediateHoldingsIncMemberus-gaap:EquitySecuritiesMember2022-09-300001496099Knockout Intermediate Holdings I, Preferred shares2022-09-300001496099ACI Parent Inc., Preferred shares2022-09-300001496099Project Essential Super Parent, Inc., Preferred shares2022-09-300001496099Diligent Preferred Issuer, Inc., Preferred shares2022-09-300001496099OEC Holdco, LLC, Preferred shares2022-09-300001496099HB Wealth Management, LLC, Preferred shares2022-09-300001496099FS WhiteWater Holdings, LLC, Ordinary shares2022-09-300001496099Appriss Health Intermediate Holdings, Inc., Preferred shares2022-09-300001496099OA Topco, L.P., Ordinary shares2022-09-300001496099Pioneer Topco I, L.P., Ordinary shares2022-09-300001496099Ancora Acquisition LLC, Preferred shares2022-09-300001496099Education Management Corporation, Preferred shares 12022-09-300001496099Education Management Corporation, Preferred shares 22022-09-300001496099Education Management Corporation, Preferred shares 32022-09-300001496099Education Management Corporation, Preferred shares 42022-09-300001496099us-gaap:EquitySecuritiesMembernmfc:EducationManagementCorporationMember2022-09-300001496099AAC Lender Holdings, LLC, Ordinary shares2022-09-300001496099country:USus-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-09-300001496099Bach Special Limited (Bach Preference Limited), Preferred shares2022-09-300001496099country:HKus-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-09-300001496099us-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-09-300001496099nmfc:FundedSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-09-300001496099American Achievement Corporation (aka AAC Holding Corp.), First lien - Undrawn2022-09-300001496099Bullhorn, Inc., First lien - Undrawn2022-09-300001496099Appriss Health, LLC, First lien - Undrawn2022-09-300001496099Coyote Buyer, LLC, First lien - Undrawn2022-09-300001496099Kele Holdco, Inc., First lien - Undrawn2022-09-300001496099Diligent Corporation, First lien - Undrawn2022-09-300001496099Calabrio, Inc., First lien - Undrawn2022-09-300001496099Granicus, Inc., First lien - Undrawn 12022-09-300001496099Granicus, Inc., First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:GranicusIncMember2022-09-300001496099Associations, Inc., First lien - Undrawn2022-09-300001496099IG Investments Holdings, LLC, First lien - Undrawn2022-09-300001496099Apptio, Inc., First lien - Undrawn2022-09-300001496099Wealth Enhancement Group, LLC, First lien - Undrawn 12022-09-300001496099Wealth Enhancement Group, LLC, First lien - Undrawn 32022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:WealthEnhancementGroupLLCMember2022-09-300001496099DCA Investment Holding, LLC, First lien - Undrawn2022-09-300001496099Safety Borrower Holdings LLC, First lien - Undrawn 12022-09-300001496099Pye-Barker Fire & Safety, LLC, First lien - Undrawn 12022-09-300001496099Notorious Topco, LLC, First lien - Undrawn 12022-09-300001496099Notorious Topco, LLC, First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:NotoriousTopcoLLCMember2022-09-300001496099KPSKY Acquisition Inc., First lien - Undrawn 12022-09-300001496099Sun Acquirer Corp., First lien - Undrawn 12022-09-300001496099Sun Acquirer Corp., First lien - Undrawn 22022-09-300001496099nmfc:SunAcquirerCorpMembernmfc:UnfundedDebtSecuritiesMember2022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:BluefinHoldingLLCMember2022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:NMCCrimsonHoldingsIncMember2022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:CGGroupHoldingsLLCMember2022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:RecordedFutureIncMember2022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:GSAcquisitioncoIncMember2022-09-300001496099PPV Intermediate Holdings LLC First lien - Undrawn 12022-09-300001496099PPV Intermediate Holdings LLC, First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:PPVIntermediateHoldingsLLCMember2022-09-300001496099Community Brands ParentCo, LLC, First lien - Undrawn 12022-09-300001496099Community Brands ParentCo, LLC, First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:CommunityBrandsParentCoLLCMember2022-09-300001496099USRP Holdings, Inc., First lien - Undrawn2022-09-300001496099Infogain Corporation, First lien - Undrawn2022-09-300001496099Trinity Air Consultants Holdings Corporation, First lien - Undrawn 12022-09-300001496099Trinity Air Consultants Holdings Corporation, First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:TrinityAirConsultantsHoldingsCorporationMember2022-09-300001496099DOCS, MSO, LLC, First lien - Undrawn 12022-09-300001496099DOCS, MSO, LLC, First lien - Undrawn 22022-09-300001496099DOCS, MSO, LLC, First lien - Undrawn 32022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:DOCSMSOLLCMember2022-09-300001496099OA Buyer, Inc., First lien - Undrawn2022-09-300001496099iCIMS, Inc., First lien - Undrawn 12022-09-300001496099iCIMS, Inc., First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:ICIMSIncMember2022-09-300001496099Daxko Acquisition Corporation, First lien - Undrawn 12022-09-300001496099Daxko Acquisition Corporation, First lien - Undrawn 22022-09-300001496099nmfc:DaxkoAcquisitionCorporationMembernmfc:UnfundedDebtSecuritiesMember2022-09-300001496099Specialtycare, Inc., First lien - Undrawn 12022-09-300001496099Specialtycare, Inc., First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:SpecialtycareIncMember2022-09-300001496099IMO Investor Holdings, Inc., First lien - Undrawn 12022-09-300001496099IMO Investor Holdings, Inc., First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:IMOInvestorHoldingsIncMember2022-09-300001496099TigerConnect, Inc., First lien - Undrawn 12022-09-300001496099TigerConnect, Inc., First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:TigerConnectIncMember2022-09-300001496099Kaseya Inc., First lien - Undrawn 12022-09-300001496099Kaseya Inc., First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:KaseyaIncMember2022-09-300001496099Pioneer Buyer I, LLC, First lien - Undrawn2022-09-300001496099FS WhiteWater Borrower, LLC, First lien - Undrawn 12022-09-300001496099FS WhiteWater Borrower, LLC, First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:FSWhiteWaterBorrowerLLCMember2022-09-300001496099Foreside Financial Group, LLC, First lien - Undrawn 12022-09-300001496099Foreside Financial Group, LLC, First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:ForesideFinancialGroupMember2022-09-300001496099Fortis Solutions Group, LLC, First lien - Undrawn 12022-09-300001496099Fortis Solutions Group, LLC, First lien - Undrawn 22022-09-300001496099Fortis Solutions Group, LLC, First lien - Undrawn 32022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:FortisSolutionsGroupLLCMember2022-09-300001496099YLG Holdings, Inc., First lien - Undrawn 12022-09-300001496099YLG Holdings, Inc., First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:YLGHoldingsIncMember2022-09-300001496099MRI Software LLC, First lien - Undrawn 12022-09-300001496099MRI Software LLC, First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:MRISoftwareLLCMember2022-09-300001496099GC Waves Holdings, Inc., First lien - Undrawn 12022-09-300001496099GC Waves Holdings, Inc., First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:GCWavesHoldingsIncMember2022-09-300001496099Deca Dental Holdings LLC, First lien - Undrawn 12022-09-300001496099Deca Dental Holdings LLC, First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:DecaDentalHoldingsLLCMember2022-09-300001496099ACI Group Holdings, Inc., First lien - Undrawn 12022-09-300001496099ACI Group Holdings, Inc., First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:ACIGroupHoldingsIncMember2022-09-300001496099AAH Topco, LLC, First lien - Undrawn 12022-09-300001496099AAH Topco, LLC, First lien - Undrawn 22022-09-300001496099AAH Topco, LLC, First lien - Undrawn 32022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:AAHTopcoLLCMember2022-09-300001496099AmeriVet Partners Management, Inc., First lien - Undrawn 12022-09-300001496099AmeriVet Partners Management, Inc., First lien - Undrawn 22022-09-300001496099nmfc:UnfundedDebtSecuritiesMembernmfc:AmeriVetPartnersManagementIncMember2022-09-300001496099nmfc:UnfundedDebtSecuritiesMembercountry:USus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-09-300001496099Tahoe Finco, LLC, First lien - Undrawn2022-09-300001496099nmfc:UnfundedDebtSecuritiesMembercountry:NLus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-09-300001496099nmfc:UnfundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2022-09-300001496099Edmentum Ultimate Holdings, LLC, Subordinated2022-09-300001496099Sierra Hamilton Holdings Corporation, Second lien2022-09-300001496099Permian Trust, First lien 12022-09-300001496099Permian Trust, First lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:PermianTrustMember2022-09-300001496099nmfc:FundedDebtSecuritiesMembercountry:USus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2022-09-300001496099TVG-Edmentum Holdings, LLC, Ordinary shares2022-09-300001496099Sierra Hamilton Holdings Corporation, Ordinary shares 12022-09-300001496099Sierra Hamilton Holdings Corporation, Ordinary shares 22022-09-300001496099nmfc:SierraHamiltonHoldingsCorporationMemberus-gaap:EquitySecuritiesMember2022-09-300001496099country:USus-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2022-09-300001496099New Benevis Holdco, Inc., First lien 12022-09-300001496099New Benevis Holdco, Inc., First lien 22022-09-300001496099New Benevis Holdco, Inc., First lien 32022-09-300001496099New Benevis Holdco, Inc., Subordinated2022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:NewBenevisHoldcoIncMember2022-09-300001496099Haven Midstream LLC, First lien 12022-09-300001496099Haven Midstream LLC, First lien 22022-09-300001496099nmfc:HavenMidstreamLLCMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099UniTek Global Services, Inc., First lien 12022-09-300001496099UniTek Global Services, Inc., First lien 22022-09-300001496099UniTek Global Services, Inc., First lien 32022-09-300001496099UniTek Global Services, Inc., First lien 42022-09-300001496099UniTek Global Services, Inc., Second lien 12022-09-300001496099UniTek Global Services, Inc., Second lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:UniTekGlobalServicesIncMember2022-09-300001496099New Permian Holdco, L.L.C., First lien2022-09-300001496099New Permian Holdco, L.L.C., First lien - Drawn2022-09-300001496099nmfc:NewPermianHoldcoLLCMembernmfc:FundedDebtSecuritiesMember2022-09-300001496099National HME, Inc., Second lien 12022-09-300001496099National HME, Inc., Second lien 22022-09-300001496099nmfc:FundedDebtSecuritiesMembernmfc:NationalHMEIncMember2022-09-300001496099nmfc:FundedDebtSecuritiesMembercountry:USus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099NMFC Senior Loan Program III LLC, Membership interest2022-09-300001496099NMFC Senior Loan Program IV LLC, Membership interest2022-09-300001496099NM NL Holdings, L.P., Membership interest2022-09-300001496099New Benevis Topco, LLC, Ordinary shares 12022-09-300001496099New Benevis Topco, LLC, Ordinary shares 22022-09-300001496099New Benevis Topco, LLC, Ordinary shares 32022-09-300001496099nmfc:NewBenevisTopcoLLCMemberus-gaap:EquitySecuritiesMember2022-09-300001496099Haven Midstream Holdings LLC, Ordinary shares2022-09-300001496099Haven Midstream Holdings LLC, Profit Interest2022-09-300001496099us-gaap:EquitySecuritiesMembernmfc:HavenMidstreamHoldingsLLCMember2022-09-300001496099UniTek Global Services, Inc., Preferred shares 12022-09-300001496099UniTek Global Services, Inc., Preferred shares 22022-09-300001496099UniTek Global Services, Inc., Preferred shares 32022-09-300001496099UniTek Global Services, Inc., Preferred shares 42022-09-300001496099UniTek Global Services, Inc., Preferred shares 52022-09-300001496099UniTek Global Services, Inc., Ordinary shares 12022-09-300001496099UniTek Global Services, Inc., Ordinary shares 22022-09-300001496099us-gaap:EquitySecuritiesMembernmfc:UniTekGlobalServicesIncMember2022-09-300001496099NM CLFX LP, Membership interest2022-09-300001496099New Permian Holdco, Inc., Ordinary shares2022-09-300001496099NM YI, LLC, Membership interest2022-09-300001496099NM GP Holdco, LLC, Membership interest2022-09-300001496099NHME Holdings Corp., Ordinary shares2022-09-300001496099NM GLCR LP, Membership interest2022-09-300001496099NM APP US LLC, Membership interest2022-09-300001496099NM DRVT LLC, Membership interest2022-09-300001496099NM JRA LLC, Membership interest2022-09-300001496099NM KRLN LLC, Membership interest2022-09-300001496099country:USus-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099NM APP Canada Corp., Membership interest2022-09-300001496099country:CAus-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099us-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099UniTek Global Services, Inc., Warrants2022-09-300001496099NHME Holdings Corp., Warrants2022-09-300001496099country:USus-gaap-supplement:InvestmentAffiliatedIssuerControlledMemberus-gaap:WarrantMember2022-09-300001496099nmfc:FundedSecuritiesMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099New Permian Holdco, L.L.C., First lien - Undrawn2022-09-300001496099Haven Midstream LLC, First lien - Undrawn2022-09-300001496099nmfc:UnfundedDebtSecuritiesMembercountry:USus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099Tennessee Bidco Limited, First lien 2 and Tennessee Bidco Limited, First lien 52022-09-300001496099nmfc:QIDNGLLLCMemberus-gaap:CommonClassBMember2022-01-012022-09-300001496099us-gaap:CommonClassBMembernmfc:QIDTRHHoldingsLLCMember2022-01-012022-09-300001496099OEConnection LLC, Second lien2022-09-30nmfc:investment0001496099OEC Holdco, LLC, Preferred shares2022-01-012022-09-300001496099Appriss Health Holdings, Inc, Wholly-owned subsidiaries2022-09-300001496099Appriss Health Intermediate Holdings, Inc., Preferred shares2022-01-012022-09-300001496099TVG-Edmentum Holdings, LLC, Ordinary shares2022-01-012022-09-300001496099UniTek Global Services, Inc., Preferred shares 4 and UniTek Global Services, Inc., Preferred shares 52022-01-012022-09-300001496099UniTek Global Services, Inc., Preferred shares 32022-01-012022-09-300001496099UniTek Global Services, Inc., Preferred shares 1 and UniTek Global Services, Inc., Preferred shares 22022-01-012022-09-300001496099Bach Special Limited (Bach Preference Limited), Preferred shares2022-01-012022-09-300001496099Dealer Tire Holdings, LLC, Preferred shares2022-01-012022-09-300001496099Symplr Software Intermediate Holdings, Inc., Preferred Shares2022-01-012022-09-300001496099Project Essential Super Parent, Inc., Preferred shares2022-01-012022-09-300001496099Diamond Parent Holdings Corp, Wholly-owned subsidiaries2022-09-300001496099Diligent Corporation, First lien2022-09-300001496099Diligent Preferred Issuer, Inc., Preferred shares2022-01-012022-09-300001496099ACI Parent Inc., Preferred shares2022-01-012022-09-300001496099HB Wealth Management, LLC, Preferred shares2022-01-012022-09-300001496099FS WhiteWater Borrower, LLC, First lien2022-09-300001496099Knockout Intermediate Holdings I, Preferred shares2022-01-012022-09-30nmfc:agreement0001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMembernmfc:PermianHoldco3IncAndPermianTrustMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMembernmfc:PermianHoldco3IncAndPermianTrustMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMembernmfc:PermianHoldco3IncAndPermianTrustMember2022-09-300001496099nmfc:SierraHamiltonHoldingsCorporationMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2021-12-310001496099nmfc:SierraHamiltonHoldingsCorporationMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2022-01-012022-09-300001496099nmfc:SierraHamiltonHoldingsCorporationMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2022-09-300001496099nmfc:TVGEdmentumHoldingsLLCAndEdmentumUltimateHoldingsLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2021-12-310001496099nmfc:TVGEdmentumHoldingsLLCAndEdmentumUltimateHoldingsLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2022-01-012022-09-300001496099nmfc:TVGEdmentumHoldingsLLCAndEdmentumUltimateHoldingsLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NationalHMEIncAndNHMEHoldingsCorpMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NationalHMEIncAndNHMEHoldingsCorpMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NationalHMEIncAndNHMEHoldingsCorpMember2022-09-300001496099nmfc:NewBenevisTopcoLLCAndNewBenevisHoldcoIncMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099nmfc:NewBenevisTopcoLLCAndNewBenevisHoldcoIncMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-01-012022-09-300001496099nmfc:NewBenevisTopcoLLCAndNewBenevisHoldcoIncMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NewPermianHoldcoIncAndNewPermianHoldcoLLCMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NewPermianHoldcoIncAndNewPermianHoldcoLLCMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NewPermianHoldcoIncAndNewPermianHoldcoLLCMember2022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMAPPCanadaCorpMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMAPPCanadaCorpMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMAPPCanadaCorpMember2022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMAPPUSLLCMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMAPPUSLLCMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMAPPUSLLCMember2022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMCLFXLPMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMCLFXLPMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMCLFXLPMember2022-09-300001496099nmfc:NMDRVTLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099nmfc:NMDRVTLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-01-012022-09-300001496099nmfc:NMDRVTLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099nmfc:NMJRALLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099nmfc:NMJRALLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-01-012022-09-300001496099nmfc:NMJRALLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMGLCRLPMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMGLCRLPMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMGLCRLPMember2022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMKRLNLLCMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMKRLNLLCMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMKRLNLLCMember2022-09-300001496099nmfc:NMNLHoldingsLPMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099nmfc:NMNLHoldingsLPMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-01-012022-09-300001496099nmfc:NMNLHoldingsLPMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMGPHoldcoLLCMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMGPHoldcoLLCMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMGPHoldcoLLCMember2022-09-300001496099nmfc:NMYILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099nmfc:NMYILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-01-012022-09-300001496099nmfc:NMYILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-01-012022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-01-012022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099nmfc:HavenMidstreamLLCAndHavenMidstreamHoldingsLLCAndQIDTRHHoldingsLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099nmfc:HavenMidstreamLLCAndHavenMidstreamHoldingsLLCAndQIDTRHHoldingsLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-01-012022-09-300001496099nmfc:HavenMidstreamLLCAndHavenMidstreamHoldingsLLCAndQIDTRHHoldingsLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:UniTekGlobalServicesIncMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:UniTekGlobalServicesIncMember2022-01-012022-09-300001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:UniTekGlobalServicesIncMember2022-09-300001496099nmfc:InvestmentsAtFairValueMembernmfc:DebtSecuritiesFirstLienMembernmfc:InvestmentTypeConcentrationRiskMember2022-01-012022-09-300001496099nmfc:InvestmentsAtFairValueMembernmfc:InvestmentTypeConcentrationRiskMembernmfc:DebtSecuritiesSecondLienMember2022-01-012022-09-300001496099nmfc:InvestmentsAtFairValueMemberus-gaap:SubordinatedDebtMembernmfc:InvestmentTypeConcentrationRiskMember2022-01-012022-09-300001496099nmfc:InvestmentsAtFairValueMemberus-gaap:OtherAggregatedInvestmentsMembernmfc:InvestmentTypeConcentrationRiskMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:SoftwareSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:BusinessServicesSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:HealthcareSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:InvestmentFundsIncludingInvestmentsInJointVenturesMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:EducationSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:ConsumerServicesSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:RealEstateSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap-supplement:ChemicalsSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap-supplement:TransportationSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:FinancialServicesSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:HealthcareInformationTechnologySectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:TechnologySectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap-supplement:EnergySectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap-supplement:ContainerAndPackagingSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:ConsumerProductsSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:GovernmentSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap-supplement:InsuranceSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:BusinessProductsSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:CommercialAndIndustrialSectorMember2022-01-012022-09-300001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:InformationServicesSectorMember2022-01-012022-09-300001496099nmfc:InvestmentsAtFairValueMembernmfc:InterestRateTypeRiskMembernmfc:DebtSecuritiesFloatingInterestRateMember2022-01-012022-09-300001496099nmfc:InvestmentsAtFairValueMembernmfc:InterestRateTypeRiskMembernmfc:DebtSecuritiesFixedInterestRateMember2022-01-012022-09-300001496099GS Acquisitionco, Inc., First lien 12021-12-310001496099GS Acquisitionco, Inc., First lien 22021-12-310001496099GS Acquisitionco, Inc., First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:GSAcquisitioncoIncMember2021-12-310001496099PhyNet Dermatology LLC, First lien 12021-12-310001496099PhyNet Dermatology LLC, First lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:PhyNetDermatologyLLCMember2021-12-310001496099Associations, Inc., First lien 12021-12-310001496099Associations, Inc., First lien 22021-12-310001496099Associations, Inc., First lien 32021-12-310001496099Associations, Inc., First lien 42021-12-310001496099Associations, Inc., First lien 52021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:AssociationsIncMember2021-12-310001496099iCIMS, Inc., First lien 12021-12-310001496099iCIMS, Inc., First lien 22021-12-310001496099iCIMS, Inc., First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:ICIMSIncMember2021-12-310001496099Frontline Technologies Group Holdings, LLC, First lien 12021-12-310001496099Frontline Technologies Group Holdings, LLC, First lien 22021-12-310001496099Frontline Technologies Group Holdings, LLC, First lien 32021-12-310001496099Frontline Technologies Group Holdings, LLC, First lien 42021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:FrontlineTechnologiesGroupHoldingsLLCMember2021-12-310001496099CentralSquare Technologies, LLC, Second lien 12021-12-310001496099CentralSquare Technologies, LLC, Second lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:CentralSquareTechnologiesLLCMember2021-12-310001496099Integro Parent Inc., First lien2021-12-310001496099Integro Parent Inc., First lien - Drawn2021-12-310001496099Integro Parent Inc., Second lien2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:IntegroParentIncMember2021-12-310001496099NM GRC Holdco, LLC, First lien 12021-12-310001496099NM GRC Holdco, LLC, First lien 22021-12-310001496099nmfc:NMGRCHoldcoLLCMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099Affinity Dental Management, Inc., First lien 12021-12-310001496099Affinity Dental Management, Inc., First lien 22021-12-310001496099Affinity Dental Management, Inc., First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:AffinityDentalManagementIncMember2021-12-310001496099Brave Parent Holdings, Inc., Second lien 12021-12-310001496099Brave Parent Holdings, Inc., Second lien 22021-12-310001496099Brave Parent Holdings, Inc., Second lien 32021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:BraveParentHoldingsIncMember2021-12-310001496099Deca Dental Holdings LLC, First lien2021-12-310001496099Deca Dental Holdings LLC, First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:DecaDentalHoldingsLLCMember2021-12-310001496099Kaseya Inc., First lien 12021-12-310001496099Kaseya Inc., First lien 22021-12-310001496099Kaseya Inc., First lien 32021-12-310001496099Kaseya Inc., First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:KaseyaIncMember2021-12-310001496099GC Waves Holdings, Inc., First lien 12021-12-310001496099GC Waves Holdings, Inc., First lien 22021-12-310001496099GC Waves Holdings, Inc., First lien - Drawn2021-12-310001496099nmfc:GCWavesHoldingsIncMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099Stamps.com Inc., First lien2021-12-310001496099OEConnection LLC, Second lien 12021-12-310001496099OEConnection LLC, Second lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:OEConnectionLLCMember2021-12-310001496099Diligent Corporation, First lien 12021-12-310001496099Diligent Corporation, First lien 22021-12-310001496099Diligent Corporation, First lien 32021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:DiligentCorporationMember2021-12-310001496099EAB Global, Inc., Second lien2021-12-310001496099KAMC Holdings, Inc, Second lien 12021-12-310001496099KAMC Holdings, Inc, Second lien 22021-12-310001496099nmfc:KAMCHoldingsIncMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099AAH Topco, LLC, First lien2021-12-310001496099AAH Topco, LLC, Subordinated2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:AAHTopcoLLCMember2021-12-310001496099IG Investments Holdings, LLC, First lien2021-12-310001496099IG Investments Holdings, LLC, First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:IGInvestmentsHoldingsLLCMember2021-12-310001496099Ansira Holdings, Inc., First lien 12021-12-310001496099Ansira Holdings, Inc., First lien 22021-12-310001496099nmfc:AnsiraHoldingsIncMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099Granicus, Inc., First lien 12021-12-310001496099Granicus, Inc., First lien 22021-12-310001496099Granicus, Inc., First lien 32021-12-310001496099Granicus, Inc., First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:GranicusIncMember2021-12-310001496099MRI Software LLC, First lien 12021-12-310001496099MRI Software LLC, First lien 22021-12-310001496099MRI Software LLC, First lien 32021-12-310001496099MRI Software LLC, First lien 42021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:MRISoftwareLLCMember2021-12-310001496099Keystone Acquisition Corp., First lien2021-12-310001496099Keystone Acquisition Corp., Second lien2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:KeystoneAcquisitionCorpMember2021-12-310001496099OA Buyer, Inc., First lien2021-12-310001496099Foundational Education Group, Inc., Second lien 12021-12-310001496099Foundational Education Group, Inc., Second lien 22021-12-310001496099nmfc:FoundationalEducationGroupIncMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099TMK Hawk Parent, Corp., First lien 12021-12-310001496099TMK Hawk Parent, Corp., First lien 22021-12-310001496099nmfc:TMKHawkParentCorpMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099New Trojan Parent, Inc., Second lien2021-12-310001496099HS Purchaser, LLC / Help/Systems Holdings, Inc., Second lien 12021-12-310001496099HS Purchaser, LLC / Help/Systems Holdings, Inc., Second lien 22021-12-310001496099nmfc:HSPurchaserLLCHelpSystemsHoldingsIncMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099VT Topco, Inc., Second lien 12021-12-310001496099VT Topco, Inc., Second lien 22021-12-310001496099nmfc:VTTopcoIncMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099CRCI Longhorn Holdings, Inc., Second lien 12021-12-310001496099CRCI Longhorn Holdings, Inc., Second lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:CRCILonghornHoldingsIncMember2021-12-310001496099Galway Borrower LLC, First lien 12021-12-310001496099Galway Borrower LLC, First lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:GalwayBorrowerLLCMember2021-12-310001496099Idera, Inc., Second lien 12021-12-310001496099Idera, Inc., Second lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:IderaIncMember2021-12-310001496099NMC Crimson Holdings, Inc., First lien 12021-12-310001496099NMC Crimson Holdings, Inc., First lien 22021-12-310001496099nmfc:NMCCrimsonHoldingsIncMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099Syndigo LLC, Second lien2021-12-310001496099ACI Group Holdings, Inc., First lien2021-12-310001496099ACI Group Holdings, Inc., First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:ACIGroupHoldingsIncMember2021-12-310001496099Cardinal Parent, Inc., First lien2021-12-310001496099Cardinal Parent, Inc., Second lien2021-12-310001496099nmfc:CardinalParentIncMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099DCA Investment Holding, LLC, First lien2021-12-310001496099DCA Investment Holding, LLC, First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:DCAInvestmentHoldingLLCMember2021-12-310001496099Spring Education Group, Inc (fka SSH Group Holdings, Inc.), Second lien2021-12-310001496099MED Parentco, LP, Second lien2021-12-310001496099DG Investment Intermediate Holdings 2, Inc., Second lien2021-12-310001496099YLG Holdings, Inc., First lien 12021-12-310001496099YLG Holdings, Inc., First lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:YLGHoldingsIncMember2021-12-310001496099Fortis Solutions Group, LLC, First lien 12021-12-310001496099Fortis Solutions Group, LLC, First lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:FortisSolutionsGroupLLCMember2021-12-310001496099Bluefin Holding, LLC, Second lien2021-12-310001496099Bluefin Holding, LLC, First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:BluefinHoldingLLCMember2021-12-310001496099Bullhorn, Inc., First lien 12021-12-310001496099Bullhorn, Inc., First lien 22021-12-310001496099Bullhorn, Inc., First lien 32021-12-310001496099Bullhorn, Inc., First lien 42021-12-310001496099Bullhorn, Inc., First lien 52021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:BullhornIncMember2021-12-310001496099Convey Health Solutions, Inc., First lien2021-12-310001496099Xactly Corporation, First lien2021-12-310001496099Infogain Corporation, First lien2021-12-310001496099American Achievement Corporation (aka AAC Holding Corp.), First lien 12021-12-310001496099American Achievement Corporation (aka AAC Holding Corp.), First lien 22021-12-310001496099American Achievement Corporation (aka AAC Holding Corp.), Subordinated2021-12-310001496099nmfc:AmericanAchievementCorporationAkaAACHoldingCorpMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099The Kleinfelder Group, Inc., First lien2021-12-310001496099Kele Holdco, Inc., First lien2021-12-310001496099Kele Holdco, Inc., First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:KeleHoldcoIncMember2021-12-310001496099Coyote Buyer, LLC, First lien 12021-12-310001496099Coyote Buyer, LLC, First lien 22021-12-310001496099nmfc:CoyoteBuyerLLCMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099Trinity Air Consultants Holdings Corporation, First lien2021-12-310001496099Trinity Air Consultants Holdings Corporation, First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:TrinityAirConsultantsHoldingsCorporationMember2021-12-310001496099Hill International, Inc., First lien2021-12-310001496099CFS Management, LLC, First lien 12021-12-310001496099CFS Management, LLC, First lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:CFSManagementLLCMember2021-12-310001496099FR Arsenal Holdings II Corp., First lien2021-12-310001496099Pioneer Buyer I, LLC, First lien2021-12-310001496099Transcendia Holdings, Inc., Second lien2021-12-310001496099Alegeus Technologies Holding Corp., First lien2021-12-310001496099Daxko Acquisition Corporation, First lien2021-12-310001496099FS WhiteWater Borrower, LLC, First lien2021-12-310001496099FS WhiteWater Borrower, LLC, First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:FSWhiteWaterBorrowerLLCMember2021-12-310001496099Community Brands ParentCo, LLC (f.k.a Ministry Brands, LLC), First lien2021-12-310001496099Community Brands ParentCo, LLC (f.k.a Ministry Brands, LLC), Second lien 12021-12-310001496099Community Brands ParentCo, LLC (f.k.a Ministry Brands, LLC), Second lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:CommunityBrandsParentCoLLCFkaMinistryBrandsLLCMember2021-12-310001496099USRP Holdings, Inc., First lien 12021-12-310001496099USRP Holdings, Inc., First lien 22021-12-310001496099USRP Holdings, Inc., First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:USRPHoldingsIncMember2021-12-310001496099Castle Management Borrower LLC, First lien2021-12-310001496099Calabrio, Inc., First lien2021-12-310001496099Apptio, Inc., First lien2021-12-310001496099Apptio, Inc., First lien - Drawn2021-12-310001496099nmfc:ApptioIncMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099CHA Holdings, Inc., Second lien 12021-12-310001496099CHA Holdings, Inc., Second lien 22021-12-310001496099nmfc:CHAHoldingsIncMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099Recorded Future, Inc., First lien 12021-12-310001496099Recorded Future, Inc., First lien 22021-12-310001496099nmfc:RecordedFutureIncMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099Vectra Co., Second lien2021-12-310001496099PPVA Black Elk (Equity) LLC, Subordinated2021-12-310001496099Notorious Topco, LLC, First lien2021-12-310001496099Notorious Topco, LLC, First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:NotoriousTopcoLLCMember2021-12-310001496099Quartz Holding Company, Second lien2021-12-310001496099Wealth Enhancement Group, LLC, First lien - Drawn 12021-12-310001496099Wealth Enhancement Group, LLC, First lien - Drawn 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:WealthEnhancementGroupLLCMember2021-12-310001496099Geo Parent Corporation, First lien2021-12-310001496099AgKnowledge Holdings Company, Inc., First lien2021-12-310001496099CG Group Holdings, LLC, First lien2021-12-310001496099CG Group Holdings, LLC, First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:CGGroupHoldingsLLCMember2021-12-310001496099Energize Holdco LLC, Second lien2021-12-310001496099KPSKY Acquisition Inc., First lien2021-12-310001496099KPSKY Acquisition Inc., First lien - Drawn2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:KPSKYAcquisitionIncMember2021-12-310001496099Specialtycare, Inc., First lien2021-12-310001496099Restaurant Technologies, Inc., Second lien2021-12-310001496099Appriss Health, LLC, First lien2021-12-310001496099ADG, LLC, Second lien2021-12-310001496099Safety Borrower Holdings LLC, First lien2021-12-310001496099Sun Acquirer Corp., First lien2021-12-310001496099Sun Acquirer Corp., First lien - Drawn2021-12-310001496099nmfc:SunAcquirerCorpMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099Pye-Barker Fire & Safety, LLC, First lien - Drawn2021-12-310001496099Education Management II LLC, First lien 12021-12-310001496099Education Management II LLC, First lien 22021-12-310001496099Education Management II LLC, First lien 32021-12-310001496099Education Management II LLC, First lien 42021-12-310001496099Education Management II LLC, First lien 52021-12-310001496099Education Management II LLC, First lien 62021-12-310001496099Education Management II LLC, First lien 72021-12-310001496099Education Management II LLC, First lien 82021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:EducationManagementIILLCMember2021-12-310001496099PPVA Fund, L.P., Collateralized Financing2021-12-310001496099nmfc:FundedDebtSecuritiesMembercountry:USus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-12-310001496099Tahoe Finco, LLC, First lien 12021-12-310001496099Tahoe Finco, LLC, First lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:TahoeFincoLLCMember2021-12-310001496099country:NLnmfc:FundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-12-310001496099Tennessee Bidco Limited, First lien 12021-12-310001496099Tennessee Bidco Limited, First lien 22021-12-310001496099Tennessee Bidco Limited, First lien - Drawn 12021-12-310001496099Tennessee Bidco Limited, First lien - Drawn 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:TennesseeBidcoLimitedMember2021-12-310001496099nmfc:FundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMembercountry:JE2021-12-310001496099Aston FinCo S.a r.l. / Aston US Finco, LLC, Second lien2021-12-310001496099nmfc:FundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMembercountry:GB2021-12-310001496099GEMS Menasa (Cayman) Limited, First lien2021-12-310001496099nmfc:FundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMembercountry:AE2021-12-310001496099nmfc:FundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-12-310001496099Dealer Tire Holdings, LLC, Preferred shares2021-12-310001496099Symplr Software Intermediate Holdings, Inc., Preferred shares 12021-12-310001496099Symplr Software Intermediate Holdings, Inc., Preferred shares 22021-12-310001496099nmfc:SymplrSoftwareIntermediateHoldingsIncMemberus-gaap:EquitySecuritiesMember2021-12-310001496099ACI Parent Inc., Preferred shares2021-12-310001496099Project Essential Super Parent, Inc., Preferred shares2021-12-310001496099Diligent Preferred Issuer, Inc., Preferred shares2021-12-310001496099OEC Holdco, LLC, Preferred shares2021-12-310001496099FS WhiteWater Holdings, LLC, Ordinary shares2021-12-310001496099HB Wealth Management, LLC, Preferred shares2021-12-310001496099Appriss Health Intermediate Holdings, Inc., Preferred shares2021-12-310001496099OA Topco, L.P., Ordinary shares2021-12-310001496099Pioneer Topco I, L.P., Ordinary shares2021-12-310001496099Ancora Acquisition LLC, Preferred shares2021-12-310001496099Education Management Corporation, Preferred shares 12021-12-310001496099Education Management Corporation, Preferred shares 22021-12-310001496099Education Management Corporation, Ordinary shares 12021-12-310001496099Education Management Corporation, Ordinary shares 22021-12-310001496099us-gaap:EquitySecuritiesMembernmfc:EducationManagementCorporationMember2021-12-310001496099AAC Lender Holdings, LLC, Ordinary shares2021-12-310001496099country:USus-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-12-310001496099Bach Special Limited (Bach Preference Limited), Preferred shares2021-12-310001496099country:HKus-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-12-310001496099us-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-12-310001496099nmfc:FundedSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-12-310001496099American Achievement Corporation (aka AAC Holding Corp.), First lien - Undrawn2021-12-310001496099Bluefin Holding, LLC, First lien - Undrawn2021-12-310001496099Wealth Enhancement Group, LLC, First lien - Undrawn 12021-12-310001496099Wealth Enhancement Group, LLC, First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:WealthEnhancementGroupLLCMember2021-12-310001496099AgKnowledge Holdings Company, Inc., First lien - Undrawn2021-12-310001496099Community Brands ParentCo, LLC (f.k.a Ministry Brands, LLC), First lien - Undrawn2021-12-310001496099Coyote Buyer, LLC, First lien - Undrawn2021-12-310001496099Pye-Barker Fire & Safety, LLC, First lien - Undrawn 12021-12-310001496099Pye-Barker Fire & Safety, LLC, First lien - Undrawn 22021-12-310001496099nmfc:PyeBarkerFireSafetyLLCMembernmfc:UnfundedDebtSecuritiesMember2021-12-310001496099Xactly Corporation, First lien - Undrawn2021-12-310001496099MRI Software LLC, First lien - Undrawn 12021-12-310001496099MRI Software LLC, First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:MRISoftwareLLCMember2021-12-310001496099Bullhorn, Inc., First lien - Undrawn 12021-12-310001496099Bullhorn, Inc., First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:BullhornIncMember2021-12-310001496099Diligent Corporation, First lien - Undrawn2021-12-310001496099GS Acquisitionco, Inc., First lien - Undrawn2021-12-310001496099YLG Holdings, Inc., First lien - Undrawn 12021-12-310001496099YLG Holdings, Inc., First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:YLGHoldingsIncMember2021-12-310001496099Apptio, Inc., First lien - Undrawn2021-12-310001496099GC Waves Holdings, Inc., First lien - Undrawn 12021-12-310001496099GC Waves Holdings, Inc., First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:GCWavesHoldingsIncMember2021-12-310001496099Kaseya Inc., First lien - Undrawn 12021-12-310001496099Kaseya Inc., First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:KaseyaIncMember2021-12-310001496099CG Group Holdings, LLC, First lien - Undrawn2021-12-310001496099Recorded Future, Inc., First lien - Undrawn2021-12-310001496099KPSKY Acquisition Inc., First lien - Undrawn2021-12-310001496099Appriss Health, LLC, First lien - Undrawn2021-12-310001496099Kele Holdco, Inc., First lien - Undrawn2021-12-310001496099USRP Holdings, Inc., First lien - Undrawn2021-12-310001496099Safety Borrower Holdings LLC, First lien - Undrawn 12021-12-310001496099Safety Borrower Holdings LLC, First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:SafetyBorrowerHoldingsLLCMember2021-12-310001496099Calabrio, Inc., First lien - Undrawn2021-12-310001496099DCA Investment Holding, LLC, First lien - Undrawn2021-12-310001496099IG Investments Holdings, LLC, First lien - Undrawn2021-12-310001496099Notorious Topco, LLC, First lien - Undrawn 12021-12-310001496099Notorious Topco, LLC, First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:NotoriousTopcoLLCMember2021-12-310001496099Associations, Inc., First lien - Undrawn2021-12-310001496099Specialtycare, Inc., First lien - Undrawn 12021-12-310001496099Specialtycare, Inc., First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:SpecialtycareIncMember2021-12-310001496099Sun Acquirer Corp., First lien - Undrawn 12021-12-310001496099Sun Acquirer Corp., First lien - Undrawn 22021-12-310001496099nmfc:SunAcquirerCorpMembernmfc:UnfundedDebtSecuritiesMember2021-12-310001496099Pioneer Buyer I, LLC, First lien - Undrawn2021-12-310001496099Daxko Acquisition Corporation, First lien - Undrawn 12021-12-310001496099Daxko Acquisition Corporation, First lien - Undrawn 22021-12-310001496099nmfc:DaxkoAcquisitionCorporationMembernmfc:UnfundedDebtSecuritiesMember2021-12-310001496099Infogain Corporation, First lien - Undrawn2021-12-310001496099OA Buyer, Inc., First lien - Undrawn2021-12-310001496099Granicus, Inc., First lien - Undrawn 12021-12-310001496099Granicus, Inc., First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:GranicusIncMember2021-12-310001496099Trinity Air Consultants Holdings Corporation, First lien - Undrawn 12021-12-310001496099Trinity Air Consultants Holdings Corporation, First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:TrinityAirConsultantsHoldingsCorporationMember2021-12-310001496099Galway Borrower LLC, First lien - Undrawn 12021-12-310001496099Galway Borrower LLC, First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:GalwayBorrowerLLCMember2021-12-310001496099FS WhiteWater Borrower, LLC, First lien - Undrawn 12021-12-310001496099FS WhiteWater Borrower, LLC, First lien - Undrawn 22021-12-310001496099FS WhiteWater Borrower, LLC, First lien - Undrawn 32021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:FSWhiteWaterBorrowerLLCMember2021-12-310001496099ACI Group Holdings, Inc., First lien - Undrawn 12021-12-310001496099ACI Group Holdings, Inc., First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:ACIGroupHoldingsIncMember2021-12-310001496099Fortis Solutions Group, LLC, First lien - Undrawn 12021-12-310001496099Fortis Solutions Group, LLC, First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:FortisSolutionsGroupLLCMember2021-12-310001496099Deca Dental Holdings LLC, First lien - Undrawn 12021-12-310001496099Deca Dental Holdings LLC, First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:DecaDentalHoldingsLLCMember2021-12-310001496099NMC Crimson Holdings, Inc., First lien - Undrawn2021-12-310001496099AAH Topco, LLC, First lien - Undrawn 12021-12-310001496099AAH Topco, LLC, First lien - Undrawn 22021-12-310001496099nmfc:UnfundedDebtSecuritiesMembernmfc:AAHTopcoLLCMember2021-12-310001496099nmfc:UnfundedDebtSecuritiesMembercountry:USus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-12-310001496099Tennessee Bidco Limited, First lien - Undrawn2021-12-310001496099nmfc:UnfundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMembercountry:JE2021-12-310001496099Tahoe Finco, LLC, First lien - Undrawn2021-12-310001496099nmfc:UnfundedDebtSecuritiesMembercountry:NLus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-12-310001496099nmfc:UnfundedDebtSecuritiesMemberus-gaap-supplement:InvestmentUnaffiliatedIssuerMember2021-12-310001496099Edmentum Ultimate Holdings, LLC, Subordinated2021-12-310001496099Sierra Hamilton Holdings Corporation, Second lien2021-12-310001496099Permian Trust, First lien 12021-12-310001496099Permian Trust, First lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:PermianTrustMember2021-12-310001496099nmfc:FundedDebtSecuritiesMembercountry:USus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2021-12-310001496099TVG-Edmentum Holdings, LLC, Ordinary shares2021-12-310001496099Sierra Hamilton Holdings Corporation, Ordinary shares 12021-12-310001496099Sierra Hamilton Holdings Corporation, Ordinary shares 22021-12-310001496099nmfc:SierraHamiltonHoldingsCorporationMemberus-gaap:EquitySecuritiesMember2021-12-310001496099country:USus-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2021-12-310001496099New Benevis Holdco, Inc., First lien 12021-12-310001496099New Benevis Holdco, Inc., First lien 22021-12-310001496099New Benevis Holdco, Inc., First lien 32021-12-310001496099New Benevis Holdco, Inc., Subordinated2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:NewBenevisHoldcoIncMember2021-12-310001496099UniTek Global Services, Inc., First lien 12021-12-310001496099UniTek Global Services, Inc., First lien 22021-12-310001496099UniTek Global Services, Inc., First lien 32021-12-310001496099UniTek Global Services, Inc., First lien 42021-12-310001496099UniTek Global Services, Inc., Second lien2021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:UniTekGlobalServicesIncMember2021-12-310001496099Tenawa Resource Management LLC, First lien 12021-12-310001496099Tenawa Resource Management LLC, First lien 22021-12-310001496099nmfc:TenawaResourceManagementLLCMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099National HME, Inc., Second lien 12021-12-310001496099National HME, Inc., Second lien 22021-12-310001496099nmfc:FundedDebtSecuritiesMembernmfc:NationalHMEIncMember2021-12-310001496099New Permian Holdco, L.L.C., First lien2021-12-310001496099New Permian Holdco, L.L.C., First lien - Drawn2021-12-310001496099nmfc:NewPermianHoldcoLLCMembernmfc:FundedDebtSecuritiesMember2021-12-310001496099nmfc:FundedDebtSecuritiesMembercountry:USus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099NMFC Senior Loan Program III LLC, Membership interest2021-12-310001496099NMFC Senior Loan Program IV LLC, Membership interest2021-12-310001496099NM NL Holdings, L.P., Membership interest2021-12-310001496099New Benevis Topco, LLC, Ordinary shares 12021-12-310001496099New Benevis Topco, LLC, Ordinary shares 22021-12-310001496099New Benevis Topco, LLC, Ordinary shares 32021-12-310001496099nmfc:NewBenevisTopcoLLCMemberus-gaap:EquitySecuritiesMember2021-12-310001496099NM GLCR LP, Membership interest2021-12-310001496099NM CLFX LP, Membership interest2021-12-310001496099UniTek Global Services, Inc., Preferred shares 12021-12-310001496099UniTek Global Services, Inc., Preferred shares 22021-12-310001496099UniTek Global Services, Inc., Preferred shares 32021-12-310001496099UniTek Global Services, Inc., Preferred shares 42021-12-310001496099UniTek Global Services, Inc., Preferred shares 52021-12-310001496099UniTek Global Services, Inc., Ordinary shares 12021-12-310001496099UniTek Global Services, Inc., Ordinary shares 22021-12-310001496099us-gaap:EquitySecuritiesMembernmfc:UniTekGlobalServicesIncMember2021-12-310001496099NM APP US LLC, Membership interest2021-12-310001496099New Permian Holdco, Inc., Ordinary shares2021-12-310001496099NM YI, LLC, Membership interest2021-12-310001496099NM DRVT LLC, Membership interest2021-12-310001496099NM JRA LLC, Membership interest2021-12-310001496099NHME Holdings Corp., Ordinary shares2021-12-310001496099NM GP Holdco, LLC, Membership interest2021-12-310001496099NM KRLN LLC, Membership interest2021-12-310001496099Tenawa Resource Holdings LLC, Ordinary shares2021-12-310001496099Tenawa Resource Holdings LLC, Profit Interest2021-12-310001496099nmfc:TenawaResourceHoldingsLLCMemberus-gaap:EquitySecuritiesMember2021-12-310001496099country:USus-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099NM APP Canada Corp., Membership interest2021-12-310001496099country:CAus-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099us-gaap:EquitySecuritiesMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099UniTek Global Services, Inc., Warrants2021-12-310001496099NHME Holdings Corp., Warrants2021-12-310001496099country:USus-gaap-supplement:InvestmentAffiliatedIssuerControlledMemberus-gaap:WarrantMember2021-12-310001496099nmfc:FundedSecuritiesMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099New Permian Holdco, L.L.C., First lien - Undrawn2021-12-310001496099Tenawa Resource Management LLC, First lien - Undrawn2021-12-310001496099nmfc:UnfundedDebtSecuritiesMembercountry:USus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099nmfc:QIDNGLLLCMemberus-gaap:CommonClassBMember2021-01-012021-12-310001496099us-gaap:CommonClassBMembernmfc:QIDTRHHoldingsLLCMember2021-01-012021-12-310001496099OEConnection LLC, Second lien2021-12-310001496099OEC Holdco, LLC, Preferred shares2021-01-012021-12-310001496099Appriss Health Holdings, Inc, Wholly-owned subsidiaries2021-12-310001496099Appriss Health Intermediate Holdings, Inc., Preferred shares2021-01-012021-12-310001496099TVG-Edmentum Holdings, LLC, Ordinary shares2021-01-012021-12-310001496099UniTek Global Services, Inc., Preferred shares 4 and UniTek Global Services, Inc., Preferred shares 52021-01-012021-12-310001496099UniTek Global Services, Inc., Preferred shares 32021-01-012021-12-310001496099UniTek Global Services, Inc., Preferred shares 1 and UniTek Global Services, Inc., Preferred shares 22021-01-012021-12-310001496099Bach Special Limited (Bach Preference Limited), Preferred shares2021-01-012021-12-310001496099Dealer Tire Holdings, LLC, Preferred shares2021-01-012021-12-310001496099Symplr Software Intermediate Holdings, Inc., Preferred shares2021-01-012021-12-310001496099Project Essential Super Parent, Inc., Preferred shares2021-01-012021-12-310001496099Diamond Parent Holdings Corp, Wholly-owned subsidiaries2021-12-310001496099Diligent Corporation, First lien2021-12-310001496099Diligent Preferred Issuer, Inc., Preferred shares2021-01-012021-12-310001496099ACI Parent Inc., Preferred shares2021-01-012021-12-310001496099HB Wealth Management, LLC, Preferred shares2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMembernmfc:PermianHoldco1IncPermianHoldco2IncPermianHoldco3IncPermianTrustMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMembernmfc:PermianHoldco1IncPermianHoldco2IncPermianHoldco3IncPermianTrustMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMembernmfc:PermianHoldco1IncPermianHoldco2IncPermianHoldco3IncPermianTrustMember2021-12-310001496099nmfc:SierraHamiltonHoldingsCorporationMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2020-12-310001496099nmfc:SierraHamiltonHoldingsCorporationMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2021-01-012021-12-310001496099nmfc:TVGEdmentumHoldingsLLCAndEdmentumUltimateHoldingsLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2020-12-310001496099nmfc:TVGEdmentumHoldingsLLCAndEdmentumUltimateHoldingsLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerNoncontrolledMember2021-01-012021-12-310001496099nmfc:EdmentumIncMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2020-12-310001496099nmfc:EdmentumIncMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-12-310001496099nmfc:EdmentumIncMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NationalHMEIncAndNHMEHoldingsCorpMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NationalHMEIncAndNHMEHoldingsCorpMember2021-01-012021-12-310001496099nmfc:NewBenevisTopcoLLCAndNewBenevisHoldcoIncMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2020-12-310001496099nmfc:NewBenevisTopcoLLCAndNewBenevisHoldcoIncMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NewPermianHoldcoIncAndNewPermianHoldcoLLCMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NewPermianHoldcoIncAndNewPermianHoldcoLLCMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMAPPCanadaCorpMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMAPPCanadaCorpMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMAPPUSLLCMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMAPPUSLLCMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMCLFXLPMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMCLFXLPMember2021-01-012021-12-310001496099nmfc:NMDRVTLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2020-12-310001496099nmfc:NMDRVTLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-12-310001496099nmfc:NMJRALLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2020-12-310001496099nmfc:NMJRALLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMGLCRLPMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMGLCRLPMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMKRLNLLCMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMKRLNLLCMember2021-01-012021-12-310001496099nmfc:NMNLHoldingsLPMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2020-12-310001496099nmfc:NMNLHoldingsLPMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMGPHoldcoLLCMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:NMGPHoldcoLLCMember2021-01-012021-12-310001496099nmfc:NMYILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2020-12-310001496099nmfc:NMYILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-12-310001496099nmfc:NMFCSeniorLoanProgramILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2020-12-310001496099nmfc:NMFCSeniorLoanProgramILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-12-310001496099nmfc:NMFCSeniorLoanProgramILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2020-12-310001496099nmfc:NMFCSeniorLoanProgramIILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-12-310001496099nmfc:NMFCSeniorLoanProgramIILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2020-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2020-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberus-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:TenawaResourceManagementLLCAndTenawaResourceHoldingsLLCAndQIDTRHHoldingsLLCMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:TenawaResourceManagementLLCAndTenawaResourceHoldingsLLCAndQIDTRHHoldingsLLCMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:TenawaResourceManagementLLCAndTenawaResourceHoldingsLLCAndQIDTRHHoldingsLLCMember2021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:UniTekGlobalServicesIncMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMembernmfc:UniTekGlobalServicesIncMember2021-01-012021-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2020-12-310001496099us-gaap-supplement:InvestmentAffiliatedIssuerControlledMember2021-01-012021-12-310001496099nmfc:InvestmentsAtFairValueMembernmfc:DebtSecuritiesFirstLienMembernmfc:InvestmentTypeConcentrationRiskMember2021-01-012021-12-310001496099nmfc:InvestmentsAtFairValueMembernmfc:InvestmentTypeConcentrationRiskMembernmfc:DebtSecuritiesSecondLienMember2021-01-012021-12-310001496099nmfc:InvestmentsAtFairValueMemberus-gaap:SubordinatedDebtMembernmfc:InvestmentTypeConcentrationRiskMember2021-01-012021-12-310001496099nmfc:InvestmentsAtFairValueMemberus-gaap:OtherAggregatedInvestmentsMembernmfc:InvestmentTypeConcentrationRiskMember2021-01-012021-12-3100014960992021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:SoftwareSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:BusinessServicesSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:HealthcareSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:InvestmentFundsIncludingInvestmentsInJointVenturesMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:EducationSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:RealEstateSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:ConsumerServicesSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap-supplement:TransportationSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap-supplement:InsuranceSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap-supplement:ChemicalsSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:TechnologySectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:FinancialServicesSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:HealthcareInformationTechnologySectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap-supplement:EnergySectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap-supplement:ContainerAndPackagingSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:GovernmentSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:BusinessProductsSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:ConsumerProductsSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMemberus-gaap:CommercialAndIndustrialSectorMember2021-01-012021-12-310001496099nmfc:IndustryConcentrationRiskMembernmfc:InvestmentsAtFairValueMembernmfc:InformationServicesSectorMember2021-01-012021-12-310001496099nmfc:InvestmentsAtFairValueMembernmfc:InterestRateTypeRiskMembernmfc:DebtSecuritiesFloatingInterestRateMember2021-01-012021-12-310001496099nmfc:InvestmentsAtFairValueMembernmfc:InterestRateTypeRiskMembernmfc:DebtSecuritiesFixedInterestRateMember2021-01-012021-12-3100014960992011-05-192022-09-300001496099nmfc:NewMountainNetLeaseCorporationMemberus-gaap:CommonStockMember2020-03-302020-03-300001496099nmfc:NewMountainNetLeaseCorporationMemberus-gaap:CommonStockMember2020-03-300001496099us-gaap:InvestmentsInMajorityOwnedSubsidiariesMember2020-03-302020-03-300001496099us-gaap:InvestmentsInMajorityOwnedSubsidiariesMemberus-gaap:DebtSecuritiesMember2020-03-302020-03-300001496099us-gaap:InvestmentsInMajorityOwnedSubsidiariesMemberus-gaap:DebtSecuritiesMember2020-03-300001496099nmfc:NewMountainNetLeaseCorporationMembernmfc:NMNLHoldingsLPNMGPHoldcoLLCMember2022-09-300001496099nmfc:NewMountainNetLeaseCorporationMembernmfc:NMCLFXLPMember2022-09-30utr:sqft0001496099nmfc:NewMountainNetLeaseCorporationMembernmfc:NMAPPCanadaCorpMember2022-09-300001496099nmfc:NewMountainNetLeaseCorporationMembernmfc:NMYILLCMember2022-09-300001496099nmfc:NewMountainNetLeaseCorporationMember2022-09-300001496099us-gaap:CommonStockMember2016-02-040001496099us-gaap:CommonStockMember2021-07-012021-09-300001496099us-gaap:CommonStockMember2021-01-012021-09-300001496099us-gaap:CommonStockMember2022-01-012022-09-300001496099us-gaap:CommonStockMember2022-07-012022-09-300001496099us-gaap:CommonStockMember2016-02-042020-12-310001496099nmfc:DebtSecuritiesFirstLienMember2022-09-300001496099nmfc:DebtSecuritiesSecondLienMember2022-09-300001496099us-gaap:SubordinatedDebtMember2022-09-300001496099us-gaap:OtherAggregatedInvestmentsMember2022-09-300001496099nmfc:SoftwareSectorMember2022-09-300001496099nmfc:BusinessServicesSectorMember2022-09-300001496099us-gaap:HealthcareSectorMember2022-09-300001496099nmfc:InvestmentFundsIncludingInvestmentsInJointVenturesMember2022-09-300001496099nmfc:EducationSectorMember2022-09-300001496099nmfc:ConsumerServicesSectorMember2022-09-300001496099us-gaap:RealEstateSectorMember2022-09-300001496099us-gaap-supplement:ChemicalsSectorMember2022-09-300001496099us-gaap-supplement:TransportationSectorMember2022-09-300001496099us-gaap:FinancialServicesSectorMember2022-09-300001496099nmfc:HealthcareInformationTechnologySectorMember2022-09-300001496099us-gaap:TechnologySectorMember2022-09-300001496099us-gaap-supplement:EnergySectorMember2022-09-300001496099us-gaap-supplement:ContainerAndPackagingSectorMember2022-09-300001496099nmfc:ConsumerProductsSectorMember2022-09-300001496099us-gaap:GovernmentSectorMember2022-09-300001496099us-gaap-supplement:InsuranceSectorMember2022-09-300001496099nmfc:BusinessProductsSectorMember2022-09-300001496099us-gaap:CommercialAndIndustrialSectorMember2022-09-300001496099nmfc:InformationServicesSectorMember2022-09-300001496099nmfc:DebtSecuritiesFirstLienMember2021-12-310001496099nmfc:DebtSecuritiesSecondLienMember2021-12-310001496099us-gaap:SubordinatedDebtMember2021-12-310001496099us-gaap:OtherAggregatedInvestmentsMember2021-12-310001496099nmfc:SoftwareSectorMember2021-12-310001496099nmfc:BusinessServicesSectorMember2021-12-310001496099us-gaap:HealthcareSectorMember2021-12-310001496099nmfc:InvestmentFundsIncludingInvestmentsInJointVenturesMember2021-12-310001496099nmfc:EducationSectorMember2021-12-310001496099us-gaap:RealEstateSectorMember2021-12-310001496099nmfc:ConsumerServicesSectorMember2021-12-310001496099us-gaap-supplement:TransportationSectorMember2021-12-310001496099us-gaap-supplement:InsuranceSectorMember2021-12-310001496099us-gaap-supplement:ChemicalsSectorMember2021-12-310001496099us-gaap:TechnologySectorMember2021-12-310001496099us-gaap:FinancialServicesSectorMember2021-12-310001496099nmfc:HealthcareInformationTechnologySectorMember2021-12-310001496099us-gaap-supplement:EnergySectorMember2021-12-310001496099us-gaap-supplement:ContainerAndPackagingSectorMember2021-12-310001496099us-gaap:GovernmentSectorMember2021-12-310001496099nmfc:BusinessProductsSectorMember2021-12-310001496099nmfc:ConsumerProductsSectorMember2021-12-310001496099us-gaap:CommercialAndIndustrialSectorMember2021-12-310001496099nmfc:InformationServicesSectorMember2021-12-310001496099Ansira Holdings, Inc.2022-09-300001496099Ansira Holdings, Inc., Non-accrual status2022-07-012022-09-300001496099Ansira Holdings, Inc., Non-accrual status2022-01-012022-09-300001496099Integro Parent Inc., Second lien, Non-accrual status2022-06-300001496099Integro Parent Inc., Second lien, Non-accrual status2022-09-300001496099Integro Parent Inc., Second lien, Non-accrual status2022-07-012022-09-300001496099Integro Parent Inc., Second lien, Non-accrual status2022-01-012022-09-300001496099National HME, Inc., Second lien2022-09-300001496099National HME, Inc., Second lien , Non-accrual status2022-07-012022-09-300001496099National HME, Inc., Second lien , Non-accrual status2022-01-012022-09-300001496099American Achievement Corporation (aka AAC Holding Corp.), First lien2022-09-300001496099American Achievement Corporation (aka AAC Holding Corp.), Subordinated, Non-accrual status2021-03-310001496099American Achievement Corporation (aka AAC Holding Corp.), First lien, Non-accrual status2021-09-300001496099American Achievement Corporation (aka AAC Holding Corp.), Non-accrual status2022-09-300001496099American Achievement Corporation (aka AAC Holding Corp.), Non-accrual status2022-07-012022-09-300001496099American Achievement Corporation (aka AAC Holding Corp.), Non-accrual status2022-01-012022-09-300001496099Sierra Hamilton Holdings Corporation, Second lien, Non-accrual status2022-07-012022-09-300001496099Sierra Hamilton Holdings Corporation, Second lien, Non-accrual status2022-01-012022-09-300001496099UniTek Global Services, Inc., Junior preferred shares, Non-accrual status2022-09-300001496099UniTek Global Services, Inc., Junior preferred shares, Non-accrual status2022-07-012022-09-300001496099UniTek Global Services, Inc., Junior preferred shares, Non-accrual status2022-01-012022-09-300001496099UniTek Global Services, Inc., Senior preferred shares, Non-accrual status2021-09-300001496099UniTek Global Services, Inc., Senior preferred shares, Non-accrual status2022-09-300001496099UniTek Global Services, Inc., Senior preferred shares, Non-accrual status2022-07-012022-09-300001496099UniTek Global Services, Inc., Senior preferred shares, Non-accrual status2022-01-012022-09-300001496099Education Management II LLC, First lien, Non-accrual status2022-09-300001496099Education Management II LLC, First lien, Non-accrual status2022-07-012022-09-300001496099Education Management II LLC, First lien, Non-accrual status2022-01-012022-09-300001496099nmfc:UnfundedDebtSecuritiesRevolvingCreditFacilitiesMember2022-09-300001496099nmfc:UnfundedDebtSecuritiesBridgeFacilitiesMember2022-09-300001496099nmfc:UnfundedDebtSecuritiesDelayedDrawsOrOtherFutureFundingCommitmentsMember2022-09-300001496099nmfc:UnfundedDebtSecuritiesRevolvingCreditFacilitiesMember2021-12-310001496099nmfc:UnfundedDebtSecuritiesBridgeFacilitiesMember2021-12-310001496099nmfc:UnfundedDebtSecuritiesDelayedDrawsOrOtherFutureFundingCommitmentsMember2021-12-310001496099PPVA Black Elk (Equity) LLC, Subordinated2013-05-030001496099PPVA Black Elk (Equity) LLC, Subordinated2014-08-012014-08-310001496099nmfc:BlackElkTrusteeMember2017-08-012017-08-310001496099nmfc:BlackElkTrusteeMember2017-12-222017-12-220001496099nmfc:BlackElkTrusteeMember2018-01-012018-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2022-01-012022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMembernmfc:SkyKnightIncomeIILLCMember2022-09-300001496099us-gaap:LineOfCreditMembernmfc:DuringReinvestmentPeriodMembernmfc:NMFCSeniorLoanProgramIIILLCMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LondonInterbankOfferedRateLIBORMember2021-07-082021-07-080001496099us-gaap:LineOfCreditMembernmfc:AfterReinvestmentPeriodMembernmfc:NMFCSeniorLoanProgramIIILLCMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LondonInterbankOfferedRateLIBORMember2021-07-082021-07-080001496099us-gaap:LineOfCreditMembernmfc:NMFCSeniorLoanProgramIIILLCMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LondonInterbankOfferedRateLIBORMember2021-07-072021-07-070001496099us-gaap:LineOfCreditMembernmfc:NMFCSeniorLoanProgramIIILLCMemberus-gaap:RevolvingCreditFacilityMember2020-11-230001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberus-gaap:RevolvingCreditFacilityMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberus-gaap:RevolvingCreditFacilityMember2021-12-310001496099nmfc:UnfundedSecuritiesMembernmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:UnfundedSecuritiesMembernmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:DebtSecuritiesFirstLienMembernmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:DebtSecuritiesFirstLienMembernmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:DebtSecuritiesFirstLienMembersrt:WeightedAverageMembernmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:DebtSecuritiesFirstLienMembersrt:WeightedAverageMembernmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-31nmfc:company0001496099Largest Portfolio Company Investmentnmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Largest Portfolio Company Investmentnmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Top Five Largest Portfolio Company Investmentsnmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Top Five Largest Portfolio Company Investmentsnmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099ADMI Corp. (aka Aspen Dental), First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Advisor Group Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099AG Parent Holdings, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Artera Services, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Aston FinCo S.a.r.l. / Aston US Finco, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099athenahealth Group Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099BCPE Empire Holdings, Inc., First lien - Funded1nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099BCPE Empire Holdings, Inc., First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Bella Holding Company, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Bluefin Holding, LLC, First lien - Funded1nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Bluefin Holding, LLC, First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Bracket Intermediate Holding Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Brave Parent Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Brown Group Holding, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Cano Health, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Cardinal Parent, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099CE Intermediate I, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099CentralSquare Technologies, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099CHA Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099CommerceHub, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Confluent Health, LLC, First lien - Funded1nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Confluent Health, LLC, First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberConfluent Medical Technologies, Inc., First lien - Funded2022-09-300001496099Cornerstone OnDemand, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberCovenant Surgical Partners, Inc., First lien - Funded12022-09-300001496099Covenant Surgical Partners, Inc., First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099CRCI Longhorn Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099CVET Midco 2, L.P., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Dealer Tire, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099DG Investment Intermediate Holdings 2, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Discovery Purchaser Corporation, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Dispatch Acquisition Holdings, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Drilling Info Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099EAB Global, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Energize Holdco LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMembereResearchTechnology, Inc., First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberEyeCare Partners, LLC, First lien - Funded2022-09-300001496099Foundational Education Group, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberFrontline Technologies Intermediate Holdings, LLC, First lien - Funded12022-09-300001496099Frontline Technologies Intermediate Holdings, LLC, First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Frontline Technologies Intermediate Holdings, LLC, First lien - Funded3nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Greenway Health, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Heartland Dental, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberHelp/Systems Holdings, Inc., First lien - Funded2022-09-300001496099Higginbotham Insurance Agency, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099HighTower Holding, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Houghton Mifflin Harcourt Company, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Idera, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberKestra Advisor Services Holdings A, Inc., First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberLI Group Holdings, Inc., , First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberLSCS Holdings, Inc., First lien - Funded2022-09-300001496099Mamba Purchaser, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Maverick Bidco Inc., , First lien - Funded1nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Maverick Bidco Inc., , First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Mavis Tire Express Services Topco Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099MED ParentCo, LP, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Mercury Borrower, Inc., Dirst lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099MH Sub I, LLC (Micro Holding Corp.), First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberMitnick Corporate Purchaser, Inc., First lien - Funded2022-09-300001496099National Intergovernmental Purchasing Alliance Company, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Navex Topco, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberNetsmart, Inc., First lien - Funded2022-09-300001496099Outcomes Group Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Pearls (Netherlands) Bidco B.V., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Peraton Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099PetVet Care Centers, LLC (fka Pearl Intermediate Parent LLC), First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Physician Partners, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Planview Parent, Inc., , First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Premise Health Holding Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Project Ruby Ultimate Parent Corp., First lien - Funded1nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Project Ruby Ultimate Parent Corp., First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099RealPage, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099RLG Holdings, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Sierra Enterprises, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Snap One Holdings Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Sovos Brands Intermediate, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberSpring Education Group, Inc. (fka SSH Group Holdings, Inc.), First lien - Funded2022-09-300001496099Storable, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Symplr Software, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Syndigo LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Therapy Brands Holdings LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Thermostat Purchaser III, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Valcour Packaging, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099VT Topco, Inc., First lien - Funded1nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099VT Topco, Inc., First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099VT Topco, Inc., First lien - Funded3nmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099WatchGuard Technologies, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Waystar Technologies, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099WP CityMD Bidco LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Wrench Group LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099YI, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:FundedSecuritiesMembernmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099athenahealth Group Inc., First lien - Unfundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberConfluent Health, LLC, First lien - Unfunded2022-09-300001496099Therapy Brands Holdings LLC, First lien - Unfundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099Thermostat Purchaser III, Inc., First lien - Unfundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099VT Topco, Inc., First lien - Unfundednmfc:NMFCSeniorLoanProgramIIILLCMember2022-09-300001496099ADMI Corp. (aka Aspen Dental), First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Advisor Group Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099AG Parent Holdings, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Artera Services, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Aston FinCo S.a.r.l. / Aston US Finco, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099BCPE Empire Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Bearcat Buyer, Inc., First lien - Funded1nmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberBearcat Buyer, Inc., First lien - Funded22021-12-310001496099Bella Holding Company, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Bluefin Holding, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Bracket Intermediate Holding Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Brave Parent Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Cano Health, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Cardinal Parent, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099CE Intermediate I, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099CentralSquare Technologies, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099CHA Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099CommerceHub, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Community Brands ParentCo, LLC (f.k.a Ministry Brands, LLC), First lien - Funded1nmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Community Brands ParentCo, LLC (f.k.a Ministry Brands, LLC), First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Community Brands ParentCo, LLC (f.k.a Ministry Brands, LLC), First lien - Funded3nmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Confluent Health, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Cornerstone OnDemand, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberCovenant Surgical Partners, Inc., First lien - Funded12021-12-310001496099Covenant Surgical Partners, Inc., First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099CRCI Longhorn Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Dealer Tire, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099DG Investment Intermediate Holdings 2, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Dispatch Acquisition Holdings, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Drilling Info Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099EAB Global, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Energize Holdco LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMembereResearchTechnology, Inc., First lien - Funded2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberEyeCare Partners, LLC, First lien - Funded2021-12-310001496099Foundational Education Group, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberFrontline Technologies Intermediate Holdings, LLC, First lien - Funded12021-12-310001496099Frontline Technologies Intermediate Holdings, LLC, First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Greenway Health, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Heartland Dental, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberHelp/Systems Holdings, Inc., First lien - Funded2021-12-310001496099Higginbotham Insurance Agency, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099HighTower Holding, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Idera, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberKestra Advisor Services Holdings A, Inc., First lien - Funded2021-12-310001496099LI Group Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberLSCS Holdings, Inc., First lien - Funded2021-12-310001496099Mamba Purchaser, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberMaravai Intermediate Holdings, LLC, First lien - Funded2021-12-310001496099Maverick Bidco Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Mavis Tire Express Services Topco Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099MED ParentCo, LP, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Mercury Borrower, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099MH Sub I, LLC (Micro Holding Corp.), First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099National Intergovernmental Purchasing Alliance Company, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Navex Topco, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberNetsmart, Inc., First lien - Funded2021-12-310001496099Newport Group Holdings II, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Outcomes Group Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Peraton Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099PetVet Care Centers, LLC (fka Pearl Intermediate Parent LLC), First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Planview Parent, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Premise Health Holding Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Project Ruby Ultimate Parent Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Quest Software US Holdings Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099RealPage, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099RLG Holdings, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Sierra Enterprises, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Snap One Holdings Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Sovos Brands Intermediate, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberSpring Education Group, Inc. (fka SSH Group Holdings, Inc.), First lien - Funded2021-12-310001496099Storable, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Symplr Software, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Syndigo LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Therapy Brands Holdings LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Thermostat Purchaser III, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099TIBCO Software Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Trader Interactive, LLC (fka Dominion Web Solutions LLC), First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Unified Women's Healthcare, LP, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Valcour Packaging, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099VetCor Professional Practices LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099VT Topco, Inc., First lien - Funded1nmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099VT Topco, Inc., First lien - Funded2nmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Waystar Technologies, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099WP CityMD Bidco LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Wrench Group LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099YI, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:FundedSecuritiesMembernmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMemberConfluent Health, LLC, First lien - Unfunded2021-12-310001496099Therapy Brands Holdings LLC, First lien - Unfundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099Thermostat Purchaser III, Inc., First lien - Unfundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099VT Topco, Inc., First lien - Unfundednmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2022-07-012022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2021-07-012021-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2021-01-012021-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2022-07-012022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2022-01-012022-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2021-07-012021-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2021-01-012021-09-300001496099nmfc:NMFCSeniorLoanProgramIIILLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2022-01-012022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:SkyKnightIncomeAlphaLLCMembernmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099us-gaap:LineOfCreditMembernmfc:NMFCSeniorLoanProgramIVLLCMemberus-gaap:RevolvingCreditFacilityMember2021-05-050001496099us-gaap:LineOfCreditMembernmfc:NMFCSeniorLoanProgramIVLLCMemberus-gaap:RevolvingCreditFacilityMemberus-gaap:LondonInterbankOfferedRateLIBORMember2021-05-052021-05-050001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberus-gaap:RevolvingCreditFacilityMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberus-gaap:RevolvingCreditFacilityMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMembernmfc:UnfundedSecuritiesMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMembernmfc:UnfundedSecuritiesMember2021-12-310001496099nmfc:DebtSecuritiesFirstLienMembernmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:DebtSecuritiesFirstLienMembernmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:DebtSecuritiesFirstLienMembersrt:WeightedAverageMembernmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:DebtSecuritiesFirstLienMembersrt:WeightedAverageMembernmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Largest Portfolio Company Investmentnmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Largest Portfolio Company Investmentnmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Top Five Largest Portfolio Company Investmentsnmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Top Five Largest Portfolio Company Investmentsnmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099ADG, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberADMI Corp. (aka Aspen Dental), First lien - Funded2022-09-300001496099Advisor Group Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Artera Services, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberathenahealth Group Inc., First lien - Funded2022-09-300001496099Barracuda Networks, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Bayou Intermediate II, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Bella Holding Company, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Bleriot US Bidco Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberBracket Intermediate Holding Corp., First lien - Funded2022-09-300001496099Brave Parent Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Brown Group Holding, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Cano Health, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099CE Intermediate I, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099CentralSquare Technologies, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberCertara Holdco, Inc., First lien - Funded2022-09-300001496099CHA Holdings, Inc., First lien - Funded1nmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099CHA Holdings, Inc., First lien - Funded2nmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Confluent Health, LLC, First lien - Funded1nmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Confluent Health, LLC, First lien - Funded2nmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberConfluent Medical Technologies, Inc., First lien - Funded2022-09-300001496099Corgi Bidco, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberCornerstone OnDemand, Inc., First lien - Funded2022-09-300001496099Dealer Tire, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberDiscovery Purchaser Corporation, First lien - Funded2022-09-300001496099Dispatch Acquisition Holdings, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberDrilling Info Holdings, Inc., First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberEAB Global, Inc., , First lien - Funded2022-09-300001496099Emerald 2 Limited, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberEnergize Holdco LLC, First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMembereResearchTechnology, Inc., First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberEyeCare Partners, LLC, First lien - Funded2022-09-300001496099Foundational Education Group, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberGeo Parent Corporation, First lien - Funded2022-09-300001496099Greenway Health, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberHeartland Dental, LLC, First lien - Funded12022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberHeartland Dental, LLC, First lien - Funded22022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberHelp/Systems Holdings, Inc., First lien - Funded2022-09-300001496099Houghton Mifflin Harcourt Company, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberHunter Holdco 3 Limited, First lien - Funded2022-09-300001496099Idera, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberKestra Advisor Services Holdings A, Inc., First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberLSCS Holdings, Inc., First lien - Funded2022-09-300001496099Mamba Purchaser, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Mandolin Technology Intermediate Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Maverick Bidco Inc., First lien - Funded1nmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Maverick Bidco Inc., First lien - Funded2nmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberMavis Tire Express Services Topco Corp., First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberMercury Borrower, Inc., First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberMH Sub I, LLC (Micro Holding Corp.), First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberNational Intergovernmental Purchasing Alliance Company, First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberNetsmart, Inc., First lien - Funded2022-09-300001496099OEConnection LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberPearls (Netherlands) Bidco B.V., First lien - Funded2022-09-300001496099PetVet Care Centers, LLC (fka Pearl Intermediate Parent LLC), First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Physician Partners, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberPremise Health Holding Corp., First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberProject Boost Purchaser, LLC, First lien - Funded2022-09-300001496099RealPage, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099RLG Holdings, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Sierra Enterprises, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Snap One Holdings Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberSovos Brands Intermediate, Inc., First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberStorable, Inc., First lien - Funded2022-09-300001496099Symplr Software, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Syndigo LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberTherapy Brands Holdings LLC, First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberThermostat Purchaser III, Inc., First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberUSIC Holdings, Inc., First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberValcour Packaging, LLC, First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberVirtusa Corporation, First lien - Funded2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberVT Topco, Inc., First lien - Funded12022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberVT Topco, Inc., First lien - Funded22022-09-300001496099WatchGuard Technologies, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberWP CityMD Bidco LLC, First lien - Funded2022-09-300001496099Wrench Group LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099YI, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Zone Climate Services, Inc., First lien - Funded1nmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Zone Climate Services, Inc., First lien - Funded2nmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:FundedSecuritiesMembernmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099athenahealth Group Inc., First lien - Unfundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberConfluent Health, LLC, First lien - Unfunded2022-09-300001496099Therapy Brands Holdings LLC, First lien - Unfundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099Thermostat Purchaser III, Inc., First lien - Unfundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099VT Topco, Inc., First lien - Unfundednmfc:NMFCSeniorLoanProgramIVLLCMember2022-09-300001496099ADG, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberADMI Corp. (aka Aspen Dental), First lien - Funded2021-12-310001496099Advisor Group Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Artera Services, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Bayou Intermediate II, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberBearcat Buyer, Inc., First lien - Funded12021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberBearcat Buyer, Inc., First lien - Funded22021-12-310001496099Bella Holding Company, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Bleriot US Bidco Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberBracket Intermediate Holding Corp., First lien - Funded2021-12-310001496099Brave Parent Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Cano Health, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099CE Intermediate I, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099CentralSquare Technologies, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberCertara Holdco, Inc., First lien - Funded2021-12-310001496099CHA Holdings, Inc., irst lien - Funded1nmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099CHA Holdings, Inc., First lien - Funded2nmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberConfluent Health, LLC, First lien - Funded2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberCornerstone OnDemand, Inc., First lien - Funded2021-12-310001496099Cvent, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Dealer Tire, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Dispatch Acquisition Holdings, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberDrilling Info Holdings, Inc., First lien - Funded2021-12-310001496099EAB Global, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Emerald 2 Limited, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Energize Holdco LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMembereResearchTechnology, Inc., First lien - Funded2021-12-310001496099EyeCare Partners, LLC, First lien - Funded1nmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099EyeCare Partners, LLC, First lien - Funded2nmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Foundational Education Group, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Greenway Health, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberHeartland Dental, LLC, First lien - Funded12021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberHeartland Dental, LLC, First lien - Funded22021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberHelp/Systems Holdings, Inc., First lien - Funded2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberHunter Holdco 3 Limited, First lien - Funded2021-12-310001496099Idera, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberKestra Advisor Services Holdings A, Inc., First lien - Funded2021-12-310001496099Keystone Acquisition Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberLSCS Holdings, Inc., First lien - Funded2021-12-310001496099Mamba Purchaser, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Mandolin Technology Intermediate Holdings, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Maverick Bidco Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberMavis Tire Express Services Topco Corp., First lien - Funded2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberMercury Borrower, Inc., First lien - Funded2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberMH Sub I, LLC (Micro Holding Corp.), First lien - Funded2021-12-310001496099Ministry Brands, LLC, First lien - Funded1nmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Ministry Brands, LLC, First lien - Funded2nmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Ministry Brands, LLC, First lien - Funded3nmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberNational Intergovernmental Purchasing Alliance Company, First lien - Funded2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberNetsmart, Inc., First lien - Funded2021-12-310001496099OEConnection LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberPetVet Care Centers, LLC, First lien - Funded2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberPremise Health Holding Corp., First lien - Funded2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberProject Boost Purchaser, LLC, First lien - Funded2021-12-310001496099Quest Software US Holdings Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099RealPage, Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099RLG Holdings, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Sierra Enterprises, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Snap One Holdings Corp., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberSovos Brands Intermediate, Inc., First lien - Funded2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberStorable, Inc., First lien - Funded2021-12-310001496099Syndigo LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberTherapy Brands Holdings LLC, First lien - Funded2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberThermostat Purchaser III, Inc., First lien - Funded2021-12-310001496099TIBCO Software Inc., First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Trader Interactive, LLC (fka Dominion Web Solutions LLC), First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Unified Women's Healthcare, LP, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberUSIC Holdings, Inc., First lien - Funded2021-12-310001496099Valcour Packaging, LLC, , First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099VetCor Professional Practices LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberVT Topco, Inc., First lien - Funded2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberWP CityMD Bidco LLC, First lien - Funded2021-12-310001496099Wrench Group LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099YI, LLC, First lien - Fundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:FundedSecuritiesMembernmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMemberConfluent Health, LLC, First lien - Unfunded2021-12-310001496099EyeCare Partners, LLC, First lien - Unfundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Therapy Brands Holdings LLC, First lien - Unfundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099Thermostat Purchaser III, Inc., First lien - Unfundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099VT Topco, Inc., First lien - Unfundednmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2022-07-012022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2021-07-012021-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2021-01-012021-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2022-07-012022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2022-01-012022-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2021-07-012021-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2021-05-052021-09-300001496099nmfc:NMFCSeniorLoanProgramIVLLCMember2021-12-310001496099nmfc:DebtSecuritiesFirstLienMember2022-09-300001496099us-gaap:FairValueInputsLevel1Membernmfc:DebtSecuritiesFirstLienMember2022-09-300001496099us-gaap:FairValueInputsLevel2Membernmfc:DebtSecuritiesFirstLienMember2022-09-300001496099us-gaap:FairValueInputsLevel3Membernmfc:DebtSecuritiesFirstLienMember2022-09-300001496099nmfc:DebtSecuritiesSecondLienMember2022-09-300001496099us-gaap:FairValueInputsLevel1Membernmfc:DebtSecuritiesSecondLienMember2022-09-300001496099us-gaap:FairValueInputsLevel2Membernmfc:DebtSecuritiesSecondLienMember2022-09-300001496099nmfc:DebtSecuritiesSecondLienMemberus-gaap:FairValueInputsLevel3Member2022-09-300001496099us-gaap:SubordinatedDebtMember2022-09-300001496099us-gaap:FairValueInputsLevel1Memberus-gaap:SubordinatedDebtMember2022-09-300001496099us-gaap:FairValueInputsLevel2Memberus-gaap:SubordinatedDebtMember2022-09-300001496099us-gaap:FairValueInputsLevel3Memberus-gaap:SubordinatedDebtMember2022-09-300001496099us-gaap:OtherAggregatedInvestmentsMember2022-09-300001496099us-gaap:FairValueInputsLevel1Memberus-gaap:OtherAggregatedInvestmentsMember2022-09-300001496099us-gaap:FairValueInputsLevel2Memberus-gaap:OtherAggregatedInvestmentsMember2022-09-300001496099us-gaap:FairValueInputsLevel3Memberus-gaap:OtherAggregatedInvestmentsMember2022-09-300001496099us-gaap:FairValueInputsLevel1Member2022-09-300001496099us-gaap:FairValueInputsLevel2Member2022-09-300001496099us-gaap:FairValueInputsLevel3Member2022-09-300001496099nmfc:DebtSecuritiesFirstLienMember2021-12-310001496099us-gaap:FairValueInputsLevel1Membernmfc:DebtSecuritiesFirstLienMember2021-12-310001496099us-gaap:FairValueInputsLevel2Membernmfc:DebtSecuritiesFirstLienMember2021-12-310001496099us-gaap:FairValueInputsLevel3Membernmfc:DebtSecuritiesFirstLienMember2021-12-310001496099nmfc:DebtSecuritiesSecondLienMember2021-12-310001496099us-gaap:FairValueInputsLevel1Membernmfc:DebtSecuritiesSecondLienMember2021-12-310001496099us-gaap:FairValueInputsLevel2Membernmfc:DebtSecuritiesSecondLienMember2021-12-310001496099nmfc:DebtSecuritiesSecondLienMemberus-gaap:FairValueInputsLevel3Member2021-12-310001496099us-gaap:SubordinatedDebtMember2021-12-310001496099us-gaap:FairValueInputsLevel1Memberus-gaap:SubordinatedDebtMember2021-12-310001496099us-gaap:FairValueInputsLevel2Memberus-gaap:SubordinatedDebtMember2021-12-310001496099us-gaap:FairValueInputsLevel3Memberus-gaap:SubordinatedDebtMember2021-12-310001496099us-gaap:OtherAggregatedInvestmentsMember2021-12-310001496099us-gaap:FairValueInputsLevel1Memberus-gaap:OtherAggregatedInvestmentsMember2021-12-310001496099us-gaap:FairValueInputsLevel2Memberus-gaap:OtherAggregatedInvestmentsMember2021-12-310001496099us-gaap:FairValueInputsLevel3Memberus-gaap:OtherAggregatedInvestmentsMember2021-12-310001496099us-gaap:FairValueInputsLevel1Member2021-12-310001496099us-gaap:FairValueInputsLevel2Member2021-12-310001496099us-gaap:FairValueInputsLevel3Member2021-12-310001496099us-gaap:InvestmentsMember2022-06-300001496099nmfc:DebtSecuritiesFirstLienMember2022-06-300001496099nmfc:DebtSecuritiesSecondLienMember2022-06-300001496099us-gaap:SubordinatedDebtMember2022-06-300001496099us-gaap:OtherAggregatedInvestmentsMember2022-06-300001496099us-gaap:InvestmentsMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2022-07-012022-09-300001496099nmfc:DebtSecuritiesFirstLienMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2022-07-012022-09-300001496099nmfc:DebtSecuritiesSecondLienMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2022-07-012022-09-300001496099nmfc:DebtAndEquitySecuritiesRealizedGainLossMemberus-gaap:SubordinatedDebtMember2022-07-012022-09-300001496099us-gaap:OtherAggregatedInvestmentsMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2022-07-012022-09-300001496099us-gaap:InvestmentsMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2022-07-012022-09-300001496099nmfc:DebtSecuritiesFirstLienMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2022-07-012022-09-300001496099nmfc:DebtSecuritiesSecondLienMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2022-07-012022-09-300001496099nmfc:DebtAndEquitySecuritiesUnrealizedGainLossMemberus-gaap:SubordinatedDebtMember2022-07-012022-09-300001496099us-gaap:OtherAggregatedInvestmentsMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2022-07-012022-09-300001496099us-gaap:InvestmentsMember2022-07-012022-09-300001496099nmfc:DebtSecuritiesFirstLienMember2022-07-012022-09-300001496099nmfc:DebtSecuritiesSecondLienMember2022-07-012022-09-300001496099us-gaap:SubordinatedDebtMember2022-07-012022-09-300001496099us-gaap:OtherAggregatedInvestmentsMember2022-07-012022-09-300001496099us-gaap:InvestmentsMember2022-09-300001496099nmfc:DebtSecuritiesFirstLienMember2022-09-300001496099nmfc:DebtSecuritiesSecondLienMember2022-09-300001496099us-gaap:SubordinatedDebtMember2022-09-300001496099us-gaap:OtherAggregatedInvestmentsMember2022-09-300001496099us-gaap:InvestmentsMember2021-06-300001496099nmfc:DebtSecuritiesFirstLienMember2021-06-300001496099nmfc:DebtSecuritiesSecondLienMember2021-06-300001496099us-gaap:SubordinatedDebtMember2021-06-300001496099us-gaap:OtherAggregatedInvestmentsMember2021-06-300001496099us-gaap:InvestmentsMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2021-07-012021-09-300001496099nmfc:DebtSecuritiesFirstLienMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2021-07-012021-09-300001496099nmfc:DebtSecuritiesSecondLienMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2021-07-012021-09-300001496099nmfc:DebtAndEquitySecuritiesRealizedGainLossMemberus-gaap:SubordinatedDebtMember2021-07-012021-09-300001496099us-gaap:OtherAggregatedInvestmentsMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2021-07-012021-09-300001496099us-gaap:InvestmentsMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2021-07-012021-09-300001496099nmfc:DebtSecuritiesFirstLienMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2021-07-012021-09-300001496099nmfc:DebtSecuritiesSecondLienMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2021-07-012021-09-300001496099nmfc:DebtAndEquitySecuritiesUnrealizedGainLossMemberus-gaap:SubordinatedDebtMember2021-07-012021-09-300001496099us-gaap:OtherAggregatedInvestmentsMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2021-07-012021-09-300001496099us-gaap:InvestmentsMember2021-07-012021-09-300001496099nmfc:DebtSecuritiesFirstLienMember2021-07-012021-09-300001496099nmfc:DebtSecuritiesSecondLienMember2021-07-012021-09-300001496099us-gaap:SubordinatedDebtMember2021-07-012021-09-300001496099us-gaap:OtherAggregatedInvestmentsMember2021-07-012021-09-300001496099us-gaap:InvestmentsMember2021-09-300001496099nmfc:DebtSecuritiesFirstLienMember2021-09-300001496099nmfc:DebtSecuritiesSecondLienMember2021-09-300001496099us-gaap:SubordinatedDebtMember2021-09-300001496099us-gaap:OtherAggregatedInvestmentsMember2021-09-300001496099us-gaap:InvestmentsMember2021-12-310001496099nmfc:DebtSecuritiesFirstLienMember2021-12-310001496099nmfc:DebtSecuritiesSecondLienMember2021-12-310001496099us-gaap:SubordinatedDebtMember2021-12-310001496099us-gaap:OtherAggregatedInvestmentsMember2021-12-310001496099us-gaap:InvestmentsMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2022-01-012022-09-300001496099nmfc:DebtSecuritiesFirstLienMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2022-01-012022-09-300001496099nmfc:DebtSecuritiesSecondLienMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2022-01-012022-09-300001496099nmfc:DebtAndEquitySecuritiesRealizedGainLossMemberus-gaap:SubordinatedDebtMember2022-01-012022-09-300001496099us-gaap:OtherAggregatedInvestmentsMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2022-01-012022-09-300001496099us-gaap:InvestmentsMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2022-01-012022-09-300001496099nmfc:DebtSecuritiesFirstLienMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2022-01-012022-09-300001496099nmfc:DebtSecuritiesSecondLienMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2022-01-012022-09-300001496099nmfc:DebtAndEquitySecuritiesUnrealizedGainLossMemberus-gaap:SubordinatedDebtMember2022-01-012022-09-300001496099us-gaap:OtherAggregatedInvestmentsMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2022-01-012022-09-300001496099us-gaap:InvestmentsMember2022-01-012022-09-300001496099nmfc:DebtSecuritiesFirstLienMember2022-01-012022-09-300001496099nmfc:DebtSecuritiesSecondLienMember2022-01-012022-09-300001496099us-gaap:SubordinatedDebtMember2022-01-012022-09-300001496099us-gaap:OtherAggregatedInvestmentsMember2022-01-012022-09-300001496099us-gaap:InvestmentsMember2020-12-310001496099nmfc:DebtSecuritiesFirstLienMember2020-12-310001496099nmfc:DebtSecuritiesSecondLienMember2020-12-310001496099us-gaap:SubordinatedDebtMember2020-12-310001496099us-gaap:OtherAggregatedInvestmentsMember2020-12-310001496099us-gaap:InvestmentsMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2021-01-012021-09-300001496099nmfc:DebtSecuritiesFirstLienMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2021-01-012021-09-300001496099nmfc:DebtSecuritiesSecondLienMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2021-01-012021-09-300001496099nmfc:DebtAndEquitySecuritiesRealizedGainLossMemberus-gaap:SubordinatedDebtMember2021-01-012021-09-300001496099us-gaap:OtherAggregatedInvestmentsMembernmfc:DebtAndEquitySecuritiesRealizedGainLossMember2021-01-012021-09-300001496099us-gaap:InvestmentsMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2021-01-012021-09-300001496099nmfc:DebtSecuritiesFirstLienMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2021-01-012021-09-300001496099nmfc:DebtSecuritiesSecondLienMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2021-01-012021-09-300001496099nmfc:DebtAndEquitySecuritiesUnrealizedGainLossMemberus-gaap:SubordinatedDebtMember2021-01-012021-09-300001496099us-gaap:OtherAggregatedInvestmentsMembernmfc:DebtAndEquitySecuritiesUnrealizedGainLossMember2021-01-012021-09-300001496099us-gaap:InvestmentsMember2021-01-012021-09-300001496099nmfc:DebtSecuritiesFirstLienMember2021-01-012021-09-300001496099nmfc:DebtSecuritiesSecondLienMember2021-01-012021-09-300001496099us-gaap:SubordinatedDebtMember2021-01-012021-09-300001496099us-gaap:OtherAggregatedInvestmentsMember2021-01-012021-09-300001496099us-gaap:FairValueInputsLevel3Membernmfc:ValuationMarketAndIncomeApproachMember