0001040971 2023 FY FALSE 0001492869 2023 FY FALSE 0001040971 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember 2023-01-01 2023-12-31 0001040971 us-gaap:CommonStockMember 2023-01-01 2023-12-31 0001040971 us-gaap:PreferredStockMember 2023-01-01 2023-12-31 0001040971 2023-06-30 iso4217:USD 0001040971 2024-02-22 xbrli:shares 0001040971 srt:SubsidiariesMember 2024-02-22 0001040971 2023-12-31 0001040971 2022-12-31 0001040971 slg:SeriesIPreferredStockMember 2022-12-31 iso4217:USD xbrli:shares 0001040971 slg:SeriesIPreferredStockMember 2023-12-31 0001040971 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2023-12-31 0001040971 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2022-12-31 0001040971 2022-01-01 2022-12-31 0001040971 2021-01-01 2021-12-31 0001040971 us-gaap:RelatedPartyMember 2023-01-01 2023-12-31 0001040971 us-gaap:RelatedPartyMember 2022-01-01 2022-12-31 0001040971 us-gaap:RelatedPartyMember 2021-01-01 2021-12-31 0001040971 us-gaap:NonrelatedPartyMember 2023-01-01 2023-12-31 0001040971 us-gaap:NonrelatedPartyMember 2022-01-01 2022-12-31 0001040971 us-gaap:NonrelatedPartyMember 2021-01-01 2021-12-31 0001040971 slg:SeriesIPreferredStockMember us-gaap:PreferredStockMember 2020-12-31 0001040971 us-gaap:CommonStockMember 2020-12-31 0001040971 us-gaap:AdditionalPaidInCapitalMember 2020-12-31 0001040971 us-gaap:TreasuryStockCommonMember 2020-12-31 0001040971 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2020-12-31 0001040971 us-gaap:RetainedEarningsMember 2020-12-31 0001040971 us-gaap:NoncontrollingInterestMember 2020-12-31 0001040971 2020-12-31 0001040971 us-gaap:RetainedEarningsMember 2021-01-01 2021-12-31 0001040971 us-gaap:NoncontrollingInterestMember 2021-01-01 2021-12-31 0001040971 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2021-01-01 2021-12-31 0001040971 us-gaap:CommonStockMember 2021-01-01 2021-12-31 0001040971 us-gaap:AdditionalPaidInCapitalMember 2021-01-01 2021-12-31 0001040971 us-gaap:TreasuryStockCommonMember 2021-01-01 2021-12-31 0001040971 slg:SeriesIPreferredStockMember us-gaap:PreferredStockMember 2021-12-31 0001040971 us-gaap:CommonStockMember 2021-12-31 0001040971 us-gaap:AdditionalPaidInCapitalMember 2021-12-31 0001040971 us-gaap:TreasuryStockCommonMember 2021-12-31 0001040971 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2021-12-31 0001040971 us-gaap:RetainedEarningsMember 2021-12-31 0001040971 us-gaap:NoncontrollingInterestMember 2021-12-31 0001040971 2021-12-31 0001040971 us-gaap:RetainedEarningsMember 2022-01-01 2022-12-31 0001040971 us-gaap:NoncontrollingInterestMember 2022-01-01 2022-12-31 0001040971 us-gaap:AdditionalPaidInCapitalMember 2022-01-01 2022-12-31 0001040971 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2022-01-01 2022-12-31 0001040971 us-gaap:CommonStockMember 2022-01-01 2022-12-31 0001040971 us-gaap:TreasuryStockCommonMember 2022-01-01 2022-12-31 0001040971 slg:SeriesIPreferredStockMember us-gaap:PreferredStockMember 2022-12-31 0001040971 us-gaap:CommonStockMember 2022-12-31 0001040971 us-gaap:AdditionalPaidInCapitalMember 2022-12-31 0001040971 us-gaap:TreasuryStockCommonMember 2022-12-31 0001040971 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2022-12-31 0001040971 us-gaap:RetainedEarningsMember 2022-12-31 0001040971 us-gaap:NoncontrollingInterestMember 2022-12-31 0001040971 us-gaap:RetainedEarningsMember 2023-01-01 2023-12-31 0001040971 us-gaap:NoncontrollingInterestMember 2023-01-01 2023-12-31 0001040971 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2023-01-01 2023-12-31 0001040971 us-gaap:CommonStockMember 2023-01-01 2023-12-31 0001040971 us-gaap:AdditionalPaidInCapitalMember 2023-01-01 2023-12-31 0001040971 slg:SeriesIPreferredStockMember us-gaap:PreferredStockMember 2023-12-31 0001040971 us-gaap:CommonStockMember 2023-12-31 0001040971 us-gaap:AdditionalPaidInCapitalMember 2023-12-31 0001040971 us-gaap:TreasuryStockCommonMember 2023-12-31 0001040971 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2023-12-31 0001040971 us-gaap:RetainedEarningsMember 2023-12-31 0001040971 us-gaap:NoncontrollingInterestMember 2023-12-31 0001040971 slg:OrdinaryDividendMember 2023-01-01 2023-12-31 0001040971 slg:OrdinaryDividendMember 2022-01-01 2022-12-31 0001040971 slg:OrdinaryDividendMember 2021-01-01 2021-12-31 0001040971 slg:SpecialDividendMember 2021-01-01 2021-12-31 0001040971 srt:SubsidiariesMember 2023-12-31 0001040971 srt:SubsidiariesMember 2022-12-31 0001040971 slg:SeriesIPreferredStockMember srt:SubsidiariesMember 2023-12-31 0001040971 slg:SeriesIPreferredStockMember srt:SubsidiariesMember 2022-12-31 0001040971 srt:SubsidiariesMember 2022-01-01 2022-12-31 0001040971 srt:SubsidiariesMember 2021-01-01 2021-12-31 0001040971 srt:SubsidiariesMember us-gaap:RelatedPartyMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:RelatedPartyMember 2022-01-01 2022-12-31 0001040971 srt:SubsidiariesMember us-gaap:RelatedPartyMember 2021-01-01 2021-12-31 0001040971 srt:SubsidiariesMember slg:SeriesIPreferredStockMember us-gaap:PreferredStockMember 2020-12-31 0001040971 srt:SubsidiariesMember us-gaap:GeneralPartnerMember us-gaap:CommonStockMember 2020-12-31 0001040971 srt:SubsidiariesMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2020-12-31 0001040971 srt:SubsidiariesMember us-gaap:NoncontrollingInterestMember 2020-12-31 0001040971 srt:SubsidiariesMember 2020-12-31 0001040971 srt:SubsidiariesMember us-gaap:GeneralPartnerMember us-gaap:CommonStockMember 2021-01-01 2021-12-31 0001040971 srt:SubsidiariesMember us-gaap:NoncontrollingInterestMember 2021-01-01 2021-12-31 0001040971 srt:SubsidiariesMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2021-01-01 2021-12-31 0001040971 srt:SubsidiariesMember slg:SeriesIPreferredStockMember us-gaap:PreferredStockMember 2021-12-31 0001040971 srt:SubsidiariesMember us-gaap:GeneralPartnerMember us-gaap:CommonStockMember 2021-12-31 0001040971 srt:SubsidiariesMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2021-12-31 0001040971 srt:SubsidiariesMember us-gaap:NoncontrollingInterestMember 2021-12-31 0001040971 srt:SubsidiariesMember 2021-12-31 0001040971 srt:SubsidiariesMember us-gaap:GeneralPartnerMember us-gaap:CommonStockMember 2022-01-01 2022-12-31 0001040971 srt:SubsidiariesMember us-gaap:NoncontrollingInterestMember 2022-01-01 2022-12-31 0001040971 srt:SubsidiariesMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2022-01-01 2022-12-31 0001040971 srt:SubsidiariesMember slg:SeriesIPreferredStockMember us-gaap:PreferredStockMember 2022-12-31 0001040971 srt:SubsidiariesMember us-gaap:GeneralPartnerMember us-gaap:CommonStockMember 2022-12-31 0001040971 srt:SubsidiariesMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2022-12-31 0001040971 srt:SubsidiariesMember us-gaap:NoncontrollingInterestMember 2022-12-31 0001040971 srt:SubsidiariesMember us-gaap:GeneralPartnerMember us-gaap:CommonStockMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:NoncontrollingInterestMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesIPreferredStockMember us-gaap:PreferredStockMember 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:GeneralPartnerMember us-gaap:CommonStockMember 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:NoncontrollingInterestMember 2023-12-31 0001040971 slg:ServiceCorporationMember 2023-01-01 2023-12-31 xbrli:pure 0001040971 slg:SLGManagementLLCMember slg:SLGreenManagementMember 2023-01-01 2023-12-31 0001040971 slg:OperatingPartnershipMember srt:SubsidiariesMember 2023-12-31 0001040971 slg:OfficePropertiesMember slg:ManhattanMember us-gaap:ConsolidatedPropertiesMember 2023-12-31 slg:building utr:sqft 0001040971 us-gaap:UnconsolidatedPropertiesMember slg:OfficePropertiesMember slg:ManhattanMember 2023-12-31 0001040971 slg:OfficePropertiesMember slg:ManhattanMember 2023-12-31 0001040971 slg:ManhattanMember slg:RetailPropertiesMember us-gaap:ConsolidatedPropertiesMember 2023-12-31 0001040971 us-gaap:UnconsolidatedPropertiesMember slg:ManhattanMember slg:RetailPropertiesMember 2023-12-31 0001040971 slg:ManhattanMember slg:RetailPropertiesMember 2023-12-31 0001040971 slg:ManhattanMember us-gaap:ConsolidatedPropertiesMember slg:DevelopmentPropertiesMember 2023-12-31 0001040971 us-gaap:UnconsolidatedPropertiesMember slg:ManhattanMember slg:DevelopmentPropertiesMember 2023-12-31 0001040971 slg:ManhattanMember slg:DevelopmentPropertiesMember 2023-12-31 0001040971 slg:ManhattanMember us-gaap:ConsolidatedPropertiesMember 2023-12-31 0001040971 us-gaap:UnconsolidatedPropertiesMember slg:ManhattanMember 2023-12-31 0001040971 slg:ManhattanMember 2023-12-31 0001040971 slg:SuburbanMember slg:OfficePropertiesMember us-gaap:ConsolidatedPropertiesMember 2023-12-31 0001040971 slg:SuburbanMember us-gaap:UnconsolidatedPropertiesMember slg:OfficePropertiesMember 2023-12-31 0001040971 slg:SuburbanMember slg:OfficePropertiesMember 2023-12-31 0001040971 slg:CommercialPropertyMember us-gaap:ConsolidatedPropertiesMember 2023-12-31 0001040971 us-gaap:UnconsolidatedPropertiesMember slg:CommercialPropertyMember 2023-12-31 0001040971 slg:CommercialPropertyMember 2023-12-31 0001040971 us-gaap:ResidentialRealEstateMember slg:ManhattanMember us-gaap:ConsolidatedPropertiesMember 2023-12-31 0001040971 us-gaap:ResidentialRealEstateMember us-gaap:UnconsolidatedPropertiesMember slg:ManhattanMember 2023-12-31 0001040971 us-gaap:ResidentialRealEstateMember slg:ManhattanMember 2023-12-31 0001040971 us-gaap:ConsolidatedPropertiesMember 2023-12-31 0001040971 us-gaap:UnconsolidatedPropertiesMember 2023-12-31 0001040971 slg:OfficePropertiesMember slg:AlternativeStrategyPortfolioMember 2023-12-31 0001040971 slg:AlternativeStrategyPortfolioMember slg:RetailPropertiesMember 2023-12-31 0001040971 slg:AlternativeStrategyPortfolioMember slg:DevelopmentPropertiesMember 2023-12-31 0001040971 slg:ManhattanMember slg:A7Dey185BroadwayMember slg:RetailPropertiesMember us-gaap:ConsolidatedPropertiesMember 2023-12-31 0001040971 us-gaap:ResidentialRealEstateMember slg:ManhattanMember slg:A7Dey185BroadwayMember us-gaap:ConsolidatedPropertiesMember 2023-12-31 0001040971 srt:OfficeBuildingMember 2023-12-31 0001040971 srt:RetailSiteMember 2023-12-31 0001040971 slg:ManagedOfficePropertiesMember 2023-12-31 0001040971 us-gaap:SubsequentEventMember us-gaap:CorporateJointVentureMember slg:HeraldSquare2Member 2024-01-01 2024-01-31 0001040971 us-gaap:SubsequentEventMember us-gaap:CorporateJointVentureMember slg:HeraldSquare2Member 2024-01-31 0001040971 us-gaap:SubsequentEventMember us-gaap:CorporateJointVentureMember slg:FifthAvenue717Member 2024-01-31 0001040971 us-gaap:BuildingMember srt:MinimumMember 2023-12-31 0001040971 us-gaap:BuildingMember srt:MaximumMember 2023-12-31 0001040971 us-gaap:AboveMarketLeasesMember srt:MinimumMember 2023-12-31 0001040971 slg:LeasesBelowMarketMember srt:MinimumMember 2023-12-31 0001040971 srt:MaximumMember us-gaap:AboveMarketLeasesMember 2023-12-31 0001040971 srt:MaximumMember slg:LeasesBelowMarketMember 2023-12-31 0001040971 slg:InPlaceLeasesMember srt:MinimumMember 2023-12-31 0001040971 srt:MaximumMember slg:InPlaceLeasesMember 2023-12-31 0001040971 slg:BuildingFeeOwnershipMember 2023-12-31 0001040971 srt:MaximumMember slg:BuildingLeaseholdInterestMember 2023-12-31 0001040971 slg:RightOfUseAssetsFinancingLeaseMember srt:MaximumMember 2023-12-31 0001040971 us-gaap:FurnitureAndFixturesMember srt:MinimumMember 2023-12-31 0001040971 srt:MaximumMember us-gaap:FurnitureAndFixturesMember 2023-12-31 0001040971 slg:MadisonAvenue625Member 2022-06-30 0001040971 slg:MadisonAvenue625Member 2022-07-01 0001040971 slg:MadisonAvenue625Member 2023-01-01 2023-12-31 0001040971 slg:MadisonAvenue625Member 2023-12-31 0001040971 us-gaap:LeaseAgreementsMember 2023-12-31 0001040971 slg:OtherIdentifiableAssetsMember 2023-12-31 0001040971 us-gaap:CommercialMortgageBackedSecuritiesMember 2023-12-31 0001040971 us-gaap:CommercialMortgageBackedSecuritiesMember 2022-12-31 0001040971 us-gaap:CommercialMortgageBackedSecuritiesMember 2023-01-01 2023-12-31 0001040971 us-gaap:CommercialMortgageBackedSecuritiesMember 2022-01-01 2022-12-31 slg:security slg:marketableSecurity 0001040971 slg:UnusedAndUnexpiredTicketsMember 2023-12-31 0001040971 slg:UnusedAndUnexpiredTicketsMember 2022-12-31 0001040971 slg:OrdinaryIncomeDividendMember 2023-01-01 2023-12-31 0001040971 slg:CapitalGainsDividendMember 2023-01-01 2023-12-31 0001040971 slg:OrdinaryIncomeDividendMember 2022-01-01 2022-12-31 0001040971 slg:CapitalGainsDividendMember 2022-01-01 2022-12-31 0001040971 slg:OrdinaryIncomeDividendMember 2021-01-01 2021-12-31 0001040971 slg:CapitalGainsDividendMember 2021-01-01 2021-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember 2023-01-01 2023-12-31 slg:tenant 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:Tenant1Member 2023-01-01 2023-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember 2023-12-31 0001040971 slg:AnnualizedRentMember slg:OneVanderbiltMember us-gaap:CustomerConcentrationRiskMember 2023-01-01 2023-12-31 0001040971 slg:AnnualizedRentMember slg:OneVanderbiltMember us-gaap:CustomerConcentrationRiskMember 2022-01-01 2022-12-31 0001040971 slg:A11MadisonAveMember slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember 2021-01-01 2021-12-31 0001040971 slg:A11MadisonAveMember slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember 2023-01-01 2023-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:ParkAvenue245Member 2022-01-01 2022-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:LexingtonAvenue420Member 2021-01-01 2021-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:LexingtonAvenue420Member 2023-01-01 2023-12-31 0001040971 slg:A11MadisonAveMember slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember 2022-01-01 2022-12-31 0001040971 slg:Broadway1515Member slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember 2021-01-01 2021-12-31 0001040971 slg:Broadway1515Member slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember 2023-01-01 2023-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:LexingtonAvenue420Member 2022-01-01 2022-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:AvenueOfTheAmericas1185Member 2021-01-01 2021-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:AvenueOfTheAmericas1185Member 2023-01-01 2023-12-31 0001040971 slg:Broadway1515Member slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember 2022-01-01 2022-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:ParkAvenue280Member 2021-01-01 2021-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:ParkAvenue280Member 2023-01-01 2023-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:AvenueOfTheAmericas1185Member 2022-01-01 2022-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:ThirdAvenue919Member 2021-01-01 2021-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:ParkAvenue245Member 2023-01-01 2023-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:ParkAvenue280Member 2022-01-01 2022-12-31 0001040971 slg:LexingtonAvenue485Member slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember 2021-01-01 2021-12-31 0001040971 slg:AnnualizedRentMember us-gaap:CustomerConcentrationRiskMember slg:W57Street555Member 2021-01-01 2021-12-31 0001040971 us-gaap:LaborForceConcentrationRiskMember us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsMember 2023-01-01 2023-12-31 0001040971 us-gaap:LaborForceConcentrationRiskMember us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsMember 2023-12-31 slg:agreement 0001040971 us-gaap:LaborForceConcentrationRiskMember us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMember 2023-01-01 2023-12-31 0001040971 slg:ParkAvenue245Member 2022-12-31 0001040971 slg:ThirdAvenue885Member 2021-12-31 0001040971 slg:FifthAvenue461Member 2021-12-31 0001040971 slg:A15911597BroadwayCrownePlazaMember 2021-12-31 0001040971 slg:A690MadisonAvenueMember 2021-12-31 0001040971 slg:ParkAvenue245Member 2023-06-30 0001040971 slg:ParkAvenue245Member 2023-06-01 2023-06-30 0001040971 slg:ThirdAvenue885Member 2022-12-31 0001040971 slg:ThirdAvenue885Member 2022-12-01 2022-12-31 0001040971 slg:FifthAvenue609Member 2022-06-30 0001040971 slg:FifthAvenue609Member 2022-06-01 2022-06-30 0001040971 slg:A15911597BroadwayCrownePlazaMember 2022-05-31 0001040971 slg:A15911597BroadwayCrownePlazaMember 2022-05-01 2022-05-31 0001040971 slg:AmsterdamAvenue1080Member 2022-04-30 0001040971 slg:AmsterdamAvenue1080Member 2022-04-01 2022-04-30 0001040971 slg:A707EleventhAvenueMember 2022-02-28 0001040971 slg:A707EleventhAvenueMember 2022-02-01 2022-02-28 0001040971 slg:East42ndStreet110Member 2021-12-31 0001040971 slg:East42ndStreet110Member 2021-12-01 2021-12-31 0001040971 slg:A590FifthAvenueMember 2021-10-31 0001040971 slg:A590FifthAvenueMember 2021-10-01 2021-10-31 0001040971 slg:East220Street42Member 2021-07-31 0001040971 slg:East220Street42Member 2021-07-01 2021-07-31 0001040971 slg:A635641SixthAvenueMember 2021-06-30 0001040971 slg:A635641SixthAvenueMember 2021-06-01 2021-06-30 0001040971 slg:A106SpringStreetMemberMember 2021-03-31 0001040971 slg:A106SpringStreetMemberMember 2021-03-01 2021-03-31 0001040971 slg:A133GreeneStreetMember 2021-02-28 0001040971 slg:A133GreeneStreetMember 2021-02-01 2021-02-28 0001040971 slg:A712MadisonAvenueMember 2021-01-31 0001040971 slg:A712MadisonAvenueMember 2021-01-01 2021-01-31 0001040971 slg:PropertiesSoldIn20232022And2021Member 2023-12-31 0001040971 slg:PropertiesSoldIn20232022And2021Member 2022-12-31 0001040971 slg:PropertiesSoldIn20232022And2021Member 2021-12-31 0001040971 2023-06-01 2023-06-30 0001040971 slg:ThirdAvenue885Member 2022-12-31 0001040971 slg:East220Street42Member 2023-06-30 0001040971 2021-07-31 0001040971 2021-07-01 2021-07-31 0001040971 slg:DebtInvestmentsInMortgageLoansMember 2023-01-01 2023-12-31 0001040971 slg:DebtInvestmentsInMortgageLoansMember 2022-01-01 2022-12-31 0001040971 slg:PreferredEquityInvestmentsInMortgageLoansMember 2023-01-01 2023-12-31 0001040971 slg:PreferredEquityInvestmentsInMortgageLoansMember 2022-01-01 2022-12-31 slg:investment 0001040971 slg:AlternativeStrategyPortfolioMember slg:DebtInvestmentWithFloatingInterestRateMember 2023-12-31 0001040971 slg:MezzanineDebtMember slg:DebtInvestmentWithFloatingInterestRateMember 2023-12-31 0001040971 slg:MezzanineDebtMember slg:DebtInvestmentWithFloatingInterestRateMember slg:LondonInterbankOfferedRateLIBOR1Member srt:MinimumMember 2023-12-31 0001040971 slg:MezzanineDebtMember slg:DebtInvestmentWithFloatingInterestRateMember srt:MaximumMember slg:LondonInterbankOfferedRateLIBOR1Member 2023-12-31 0001040971 slg:MezzanineDebtMember slg:FixedRateMember 2023-12-31 0001040971 slg:MezzanineDebtMember slg:FixedRateMember srt:MinimumMember 2023-12-31 0001040971 slg:MezzanineDebtMember srt:MaximumMember slg:FixedRateMember 2023-12-31 0001040971 slg:MezzanineDebtMember 2023-12-31 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember slg:PreferredEquityMember 2023-12-31 0001040971 slg:FixedRateMember slg:PreferredEquityMember 2023-12-31 0001040971 slg:PreferredEquityMember 2023-12-31 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember 2023-12-31 0001040971 slg:FixedRateMember 2023-12-31 slg:loan 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember slg:ThreeMortgageInvestmentsMember 2023-12-31 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember slg:MortgageInvestmentOneMember 2022-12-31 0001040971 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2023-12-31 0001040971 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2022-12-31 0001040971 us-gaap:RiskLevelLowMember 2023-12-31 0001040971 us-gaap:RiskLevelLowMember 2022-12-31 0001040971 us-gaap:RiskLevelMediumMember 2023-12-31 0001040971 us-gaap:RiskLevelMediumMember 2022-12-31 0001040971 us-gaap:RiskLevelHighMember 2023-12-31 0001040971 us-gaap:RiskLevelHighMember 2022-12-31 0001040971 us-gaap:RiskLevelMediumMember 2023-01-01 2023-12-31 slg:segment 0001040971 us-gaap:OtherAssetsMember 2023-12-31 0001040971 us-gaap:OtherAssetsMember 2022-12-31 0001040971 us-gaap:OtherAssetsMember 2022-01-01 2022-12-31 0001040971 us-gaap:OtherAssetsMember 2023-01-01 2023-12-31 0001040971 2020-08-01 2023-12-31 0001040971 slg:FixedRateMember slg:MezzanineLoanDueJune2023Member 2023-12-31 0001040971 slg:FixedRateMember slg:MezzanineLoanDueJune2023Member 2022-12-31 0001040971 slg:MezzanineLoanDueJune20242Member slg:FixedRateMember 2023-12-31 0001040971 slg:MezzanineLoanDueJune20242Member slg:FixedRateMember 2022-12-31 0001040971 slg:FixedRateMember slg:MezzanineLoanDueJune2024Member 2023-12-31 0001040971 slg:FixedRateMember slg:MezzanineLoanDueJune2024Member 2022-12-31 0001040971 slg:FixedRateMember slg:MezzanineLoanDueJanuary2025Member 2023-12-31 0001040971 slg:FixedRateMember slg:MezzanineLoanDueJanuary2025Member 2022-12-31 0001040971 slg:FixedRateMember slg:MezzanineLoanDueDecember2029Member 2023-12-31 0001040971 slg:FixedRateMember slg:MezzanineLoanDueDecember2029Member 2022-12-31 0001040971 slg:FixedRateMember 2023-12-31 0001040971 slg:FixedRateMember 2022-12-31 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember slg:MezzanineLoanDueApril2023Member 2023-12-31 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember slg:MezzanineLoanDueApril2023Member 2022-12-31 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember slg:MezzanineLoanDueMay2023Member 2023-12-31 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember slg:MezzanineLoanDueMay2023Member 2022-12-31 0001040971 slg:MezzanineLoanDueMay20232Member slg:DebtInvestmentWithFloatingInterestRateMember 2023-12-31 0001040971 slg:MezzanineLoanDueMay20232Member slg:DebtInvestmentWithFloatingInterestRateMember 2022-12-31 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember slg:MezzanineLoanDueJuly2023Member 2023-12-31 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember slg:MezzanineLoanDueJuly2023Member 2022-12-31 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember 2023-12-31 0001040971 slg:DebtInvestmentWithFloatingInterestRateMember 2022-12-31 0001040971 slg:DebtInvestmentsInMortgageLoansMember 2023-12-31 0001040971 slg:DebtInvestmentsInMortgageLoansMember 2022-12-31 0001040971 slg:MezzanineLoanDueJune2024Member 2023-12-31 0001040971 slg:PreferredEquityInvestmentsInMortgageLoansMember 2023-01-01 2023-12-31 0001040971 slg:PreferredEquityFebruary2027Member 2023-12-31 0001040971 slg:PreferredEquityFebruary2027Member 2022-12-31 0001040971 slg:PreferredEquityInvestmentsInMortgageLoansMember 2023-12-31 0001040971 slg:PreferredEquityInvestmentsInMortgageLoansMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 slg:ParkAvenue100Member slg:PrudentialRealEstateInvestorsMember us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 slg:WhartonPropertiesPrivateInvestorMember us-gaap:CorporateJointVentureMember slg:FifthAvenue717Member 2023-12-31 0001040971 slg:PrivateInvestorsMember us-gaap:CorporateJointVentureMember slg:ThirdAvenue800Member 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember slg:ThirdAvenue919Member 2023-12-31 0001040971 slg:PrivateInvestorWhartonPropertiesMember us-gaap:CorporateJointVentureMember slg:West11Street34Member 2023-12-31 0001040971 slg:ParkAvenue280Member us-gaap:CorporateJointVentureMember slg:VornadoRealtyTrustMember 2023-12-31 0001040971 slg:A1552BroadwayMember us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember 2023-12-31 0001040971 slg:East53rdStreet10Member us-gaap:CorporateJointVentureMember slg:CanadianPensionPlanInvestmentBoardMember 2023-12-31 0001040971 slg:FifthAvenue650Member us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:MadisonAve11Member slg:PGIMRealEstateMember 2023-12-31 0001040971 slg:OneVanderbiltMember us-gaap:CorporateJointVentureMember slg:NationalPensionServiceOfKoreaHinesInterestLPMember 2023-12-31 0001040971 slg:RXRRealtyNewYorkREITMember us-gaap:CorporateJointVentureMember slg:WorldwidePlazaMember 2023-12-31 0001040971 slg:AllianzRealEstateOfAmericaMember us-gaap:CorporateJointVentureMember slg:Broadway1515Member 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:IsraeliInstitutionalInvestorMember slg:HeraldSquare2Member 2023-12-31 0001040971 slg:PrivateInvestorsMember us-gaap:CorporateJointVentureMember slg:SpringStreet115Member 2023-12-31 0001040971 slg:AFundManagedByMeritzAlternativeInvestmentManagementMember us-gaap:CorporateJointVentureMember slg:Beekman15Member 2023-12-31 0001040971 slg:WellsFargoMember us-gaap:CorporateJointVentureMember slg:A85FifthAvenueMember 2023-12-31 0001040971 slg:OneMadisonAvenueMember us-gaap:CorporateJointVentureMember slg:NationalPensionServiceOfKoreaHinesInterestLPInternationalInvestorMember 2023-12-31 0001040971 slg:AFundManagedByMeritzAlternativeInvestmentManagementMember us-gaap:CorporateJointVentureMember slg:East220Street42Member 2023-12-31 0001040971 slg:ParkAvenue450Member us-gaap:CorporateJointVentureMember slg:KoreanInstitutionalInvestorIsraeliInstitutionalInvestorMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:RXRRealtyLedInvestmentGroupMember slg:TimesSquare5Member 2023-12-31 0001040971 slg:ParkAvenue245Member us-gaap:CorporateJointVentureMember slg:USAffiliateOfMoriTrustCoLtdMember 2023-12-31 0001040971 slg:MadisonAvenue625Member slg:PrivateInvestorsMember us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 slg:A1552BroadwayMember 2023-12-01 2023-12-31 0001040971 slg:HeraldSquare2Member 2023-12-01 2023-12-31 0001040971 slg:OneMadisonAvenueMember slg:NationalPensionServiceOfKoreaHinesInterestLPInternationalInvestorMember 2020-12-31 0001040971 slg:OneMadisonAvenueMember slg:NationalPensionServiceOfKoreaHinesInterestLPInternationalInvestorMember 2020-01-01 2020-12-31 0001040971 slg:OneMadisonAvenueMember slg:NationalPensionServiceOfKoreaHinesInterestLPInternationalInvestorMember 2021-12-31 0001040971 slg:ParkAvenue450Member slg:ThirdPartyMember slg:KoreanInstitutionalInvestorIsraeliInstitutionalInvestorMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:PrivateInvestorMember slg:MadisonAve625Member 2023-09-30 0001040971 slg:MadisonAvenue625Member 2023-09-01 2023-09-30 0001040971 us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember slg:East21Street66Member 2023-02-28 0001040971 us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember slg:East21Street66Member 2023-02-01 2023-02-28 0001040971 slg:GreeneStreet121Member us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember 2023-02-28 0001040971 slg:GreeneStreet121Member us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember 2023-02-01 2023-02-28 0001040971 slg:StonehengePropertiesMember us-gaap:CorporateJointVentureMember 2021-09-30 0001040971 slg:StonehengePropertiesMember us-gaap:CorporateJointVentureMember 2021-09-01 2021-09-30 0001040971 slg:BlackRockIncAndStonehengePartnersMember us-gaap:CorporateJointVentureMember slg:East40047thStreetMember 2021-06-30 0001040971 slg:BlackRockIncAndStonehengePartnersMember us-gaap:CorporateJointVentureMember slg:East40047thStreetMember 2021-06-01 2021-06-30 0001040971 slg:A605West42ndStreetMember us-gaap:CorporateJointVentureMember slg:TheMoinianGroupMember 2021-03-31 0001040971 slg:A605West42ndStreetMember us-gaap:CorporateJointVentureMember slg:TheMoinianGroupMember 2021-03-01 2021-03-31 0001040971 slg:PrudentialRealEstateInvestorsMember slg:A55West46thStreetTower46Member us-gaap:CorporateJointVentureMember 2021-03-31 0001040971 slg:PrudentialRealEstateInvestorsMember slg:A55West46thStreetTower46Member us-gaap:CorporateJointVentureMember 2021-03-01 2021-03-31 0001040971 slg:East40047thStreetMember 2021-04-01 2021-04-30 0001040971 slg:WhartonPropertiesPrivateInvestorMember us-gaap:MortgagesMember us-gaap:CorporateJointVentureMember slg:FifthAvenue717Member 2023-12-31 0001040971 slg:WhartonPropertiesPrivateInvestorMember us-gaap:MortgagesMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:FifthAvenue717Member 2023-12-31 0001040971 slg:WhartonPropertiesPrivateInvestorMember us-gaap:MortgagesMember us-gaap:CorporateJointVentureMember slg:FifthAvenue717Member 2022-12-31 0001040971 slg:WhartonPropertiesPrivateInvestorMember us-gaap:MortgagesMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:FifthAvenue717Member 2022-12-31 0001040971 slg:FifthAvenue650Member us-gaap:MortgagesMember us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember 2023-12-31 0001040971 slg:FifthAvenue650Member us-gaap:MortgagesMember us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:FifthAvenue650Member us-gaap:MortgagesMember us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember 2022-12-31 0001040971 slg:FifthAvenue650Member us-gaap:MortgagesMember us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember us-gaap:CommonStockMember 2022-12-31 0001040971 slg:AFundManagedByMeritzAlternativeInvestmentManagementMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:East220Street42Member 2023-12-31 0001040971 slg:AFundManagedByMeritzAlternativeInvestmentManagementMember us-gaap:CorporateJointVentureMember slg:East220Street42Member 2022-12-31 0001040971 slg:AFundManagedByMeritzAlternativeInvestmentManagementMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:East220Street42Member 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:RXRRealtyLedInvestmentGroupMember slg:TimesSquare5Member 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:RXRRealtyLedInvestmentGroupMember slg:TimesSquare5Member 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:RXRRealtyLedInvestmentGroupMember slg:TimesSquare5Member 2022-12-31 0001040971 slg:East53rdStreet10Member us-gaap:CorporateJointVentureMember slg:CanadianPensionPlanInvestmentBoardMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:East53rdStreet10Member us-gaap:CorporateJointVentureMember slg:CanadianPensionPlanInvestmentBoardMember 2022-12-31 0001040971 slg:East53rdStreet10Member us-gaap:CorporateJointVentureMember slg:CanadianPensionPlanInvestmentBoardMember us-gaap:CommonStockMember 2022-12-31 0001040971 slg:AllianzRealEstateOfAmericaMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:Broadway1515Member 2023-12-31 0001040971 slg:AllianzRealEstateOfAmericaMember us-gaap:CorporateJointVentureMember slg:Broadway1515Member 2022-12-31 0001040971 slg:AllianzRealEstateOfAmericaMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:Broadway1515Member 2022-12-31 0001040971 slg:PrivateInvestorsMember us-gaap:CorporateJointVentureMember slg:SpringStreet115Member us-gaap:CommonStockMember 2023-12-31 0001040971 slg:PrivateInvestorsMember us-gaap:CorporateJointVentureMember slg:SpringStreet115Member 2022-12-31 0001040971 slg:PrivateInvestorsMember us-gaap:CorporateJointVentureMember slg:SpringStreet115Member us-gaap:CommonStockMember 2022-12-31 0001040971 slg:ParkAvenue450Member us-gaap:CorporateJointVentureMember slg:KoreanInstitutionalInvestorIsraeliInstitutionalInvestorMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:ParkAvenue450Member us-gaap:CorporateJointVentureMember slg:KoreanInstitutionalInvestorIsraeliInstitutionalInvestorMember 2022-12-31 0001040971 slg:ParkAvenue450Member us-gaap:CorporateJointVentureMember slg:KoreanInstitutionalInvestorIsraeliInstitutionalInvestorMember us-gaap:CommonStockMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:MadisonAve11Member slg:PGIMRealEstateMember us-gaap:CommonStockMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:MadisonAve11Member slg:PGIMRealEstateMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:MadisonAve11Member slg:PGIMRealEstateMember us-gaap:CommonStockMember 2022-12-31 0001040971 slg:OneMadisonAvenueMember us-gaap:CorporateJointVentureMember slg:NationalPensionServiceOfKoreaHinesInterestLPInternationalInvestorMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:OneMadisonAvenueMember us-gaap:CorporateJointVentureMember slg:NationalPensionServiceOfKoreaHinesInterestLPInternationalInvestorMember 2022-12-31 0001040971 slg:OneMadisonAvenueMember us-gaap:CorporateJointVentureMember slg:NationalPensionServiceOfKoreaHinesInterestLPInternationalInvestorMember us-gaap:CommonStockMember 2022-12-31 0001040971 slg:PrivateInvestorsMember us-gaap:CorporateJointVentureMember slg:ThirdAvenue800Member us-gaap:CommonStockMember 2023-12-31 0001040971 slg:PrivateInvestorsMember us-gaap:CorporateJointVentureMember slg:ThirdAvenue800Member 2022-12-31 0001040971 slg:PrivateInvestorsMember us-gaap:CorporateJointVentureMember slg:ThirdAvenue800Member us-gaap:CommonStockMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember us-gaap:CommonStockMember slg:ThirdAvenue919Member 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember slg:ThirdAvenue919Member 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember us-gaap:CommonStockMember slg:ThirdAvenue919Member 2022-12-31 0001040971 slg:MadisonAvenue625Member us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember 2023-12-31 0001040971 slg:MadisonAvenue625Member us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:MadisonAvenue625Member us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember 2022-12-31 0001040971 slg:MadisonAvenue625Member us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember us-gaap:CommonStockMember 2022-12-31 0001040971 slg:ParkAvenue245Member us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember 2023-12-31 0001040971 slg:ParkAvenue245Member us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:ParkAvenue245Member us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember 2022-12-31 0001040971 slg:ParkAvenue245Member us-gaap:CorporateJointVentureMember slg:NewYorkStateTeachersRetirementSystemMember us-gaap:CommonStockMember 2022-12-31 0001040971 slg:RXRRealtyNewYorkREITMember us-gaap:CorporateJointVentureMember slg:WorldwidePlazaMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:RXRRealtyNewYorkREITMember us-gaap:CorporateJointVentureMember slg:WorldwidePlazaMember 2022-12-31 0001040971 slg:RXRRealtyNewYorkREITMember us-gaap:CorporateJointVentureMember slg:WorldwidePlazaMember us-gaap:CommonStockMember 2022-12-31 0001040971 slg:OneVanderbiltMember us-gaap:CorporateJointVentureMember slg:NationalPensionServiceOfKoreaHinesInterestLPMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:OneVanderbiltMember us-gaap:CorporateJointVentureMember slg:NationalPensionServiceOfKoreaHinesInterestLPMember 2022-12-31 0001040971 slg:OneVanderbiltMember us-gaap:CorporateJointVentureMember slg:NationalPensionServiceOfKoreaHinesInterestLPMember us-gaap:CommonStockMember 2022-12-31 0001040971 slg:ParkAvenue280Member us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:VornadoRealtyTrustMember 2023-12-31 0001040971 slg:ParkAvenue280Member us-gaap:CorporateJointVentureMember slg:VornadoRealtyTrustMember 2022-12-31 0001040971 slg:ParkAvenue280Member us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:VornadoRealtyTrustMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:East21Street66Member slg:VornadoRealtyTrustMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:East21Street66Member us-gaap:CommonStockMember slg:VornadoRealtyTrustMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:East21Street66Member slg:VornadoRealtyTrustMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:East21Street66Member us-gaap:CommonStockMember slg:VornadoRealtyTrustMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember 2022-12-31 0001040971 slg:PrivateInvestorWhartonPropertiesMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:West11Street34Member 2023-12-31 0001040971 slg:PrivateInvestorWhartonPropertiesMember us-gaap:CorporateJointVentureMember slg:West11Street34Member 2022-12-31 0001040971 slg:PrivateInvestorWhartonPropertiesMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:West11Street34Member 2022-12-31 0001040971 slg:FifthAvenue650Member us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:FifthAvenue650Member us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember 2022-12-31 0001040971 slg:FifthAvenue650Member us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember us-gaap:CommonStockMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:IsraeliInstitutionalInvestorMember us-gaap:CommonStockMember slg:HeraldSquare2Member 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:IsraeliInstitutionalInvestorMember slg:HeraldSquare2Member 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:IsraeliInstitutionalInvestorMember us-gaap:CommonStockMember slg:HeraldSquare2Member 2022-12-31 0001040971 slg:ParkAvenue100Member slg:PrudentialRealEstateInvestorsMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:ParkAvenue100Member slg:PrudentialRealEstateInvestorsMember us-gaap:CorporateJointVentureMember 2022-12-31 0001040971 slg:ParkAvenue100Member slg:PrudentialRealEstateInvestorsMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember 2022-12-31 0001040971 slg:AFundManagedByMeritzAlternativeInvestmentManagementMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:Beekman15Member 2023-12-31 0001040971 slg:AFundManagedByMeritzAlternativeInvestmentManagementMember us-gaap:CorporateJointVentureMember slg:Beekman15Member 2022-12-31 0001040971 slg:AFundManagedByMeritzAlternativeInvestmentManagementMember us-gaap:CorporateJointVentureMember us-gaap:CommonStockMember slg:Beekman15Member 2022-12-31 0001040971 slg:A1552BroadwayMember us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:A1552BroadwayMember us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember 2022-12-31 0001040971 slg:A1552BroadwayMember us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember us-gaap:CommonStockMember 2022-12-31 0001040971 slg:ParkAvenue280Member us-gaap:CorporateJointVentureMember slg:RXRRealtyLedInvestmentGroupMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:East21Street66Member slg:RXRRealtyLedInvestmentGroupMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:East21Street66Member us-gaap:CommonStockMember slg:RXRRealtyLedInvestmentGroupMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:East21Street66Member slg:RXRRealtyLedInvestmentGroupMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:East21Street66Member us-gaap:CommonStockMember slg:RXRRealtyLedInvestmentGroupMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:SpringStreet115Member slg:RXRRealtyLedInvestmentGroupMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:SpringStreet115Member us-gaap:CommonStockMember slg:RXRRealtyLedInvestmentGroupMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:SpringStreet115Member slg:RXRRealtyLedInvestmentGroupMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:SpringStreet115Member us-gaap:CommonStockMember slg:RXRRealtyLedInvestmentGroupMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember slg:GreeneStreet121Member 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember us-gaap:CommonStockMember slg:GreeneStreet121Member 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember slg:GreeneStreet121Member 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember us-gaap:CommonStockMember slg:GreeneStreet121Member 2022-12-31 0001040971 slg:FifthAvenue650Member us-gaap:CorporateJointVentureMember slg:WhartonPropertiesMember 2023-01-01 2023-12-31 0001040971 us-gaap:ConstructionLoansMember slg:OneMadisonAvenueMember us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 us-gaap:ConstructionLoansMember slg:OneMadisonAvenueMember us-gaap:CorporateJointVentureMember 2023-01-01 2023-12-31 slg:extension 0001040971 slg:MadisonAvenue625Member slg:PrivateInvestorsMember us-gaap:CorporateJointVentureMember 2023-01-01 2023-12-31 0001040971 us-gaap:ConstructionLoansMember us-gaap:CorporateJointVentureMember slg:Beekman15Member 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:ManagementServiceBaseMember 2023-01-01 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:ManagementServiceBaseMember 2022-01-01 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:ManagementServiceBaseMember 2021-01-01 2021-12-31 0001040971 us-gaap:CorporateJointVentureMember 2023-01-01 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember 2022-01-01 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember 2021-01-01 2021-12-31 0001040971 srt:WeightedAverageMember slg:LexingtonAvenue420Member 2023-12-31 0001040971 slg:LexingtonAvenue420Member 2023-12-31 0001040971 slg:LexingtonAvenue420Member 2022-12-31 0001040971 srt:WeightedAverageMember slg:ChurchStreet100Member 2023-12-31 0001040971 slg:ChurchStreet100Member 2023-12-31 0001040971 slg:ChurchStreet100Member 2022-12-31 0001040971 srt:WeightedAverageMember slg:A7Dey185BroadwayMember 2023-12-31 0001040971 slg:A7Dey185BroadwayMember 2023-12-31 0001040971 slg:A7Dey185BroadwayMember 2022-12-31 0001040971 srt:WeightedAverageMember slg:LandmarkSquareMember 2023-12-31 0001040971 slg:LandmarkSquareMember 2023-12-31 0001040971 slg:LandmarkSquareMember 2022-12-31 0001040971 srt:WeightedAverageMember slg:LexingtonAvenue485Member 2023-12-31 0001040971 slg:LexingtonAvenue485Member 2023-12-31 0001040971 slg:LexingtonAvenue485Member 2022-12-31 0001040971 slg:SevenOneNineSeventhAvenueMember 2023-12-31 0001040971 slg:SevenOneNineSeventhAvenueMember 2022-12-31 0001040971 slg:ParkAvenue245Member 2023-12-31 0001040971 slg:ParkAvenue245Member 2022-12-31 0001040971 srt:WeightedAverageMember slg:A690MadisonAvenueMember 2023-12-31 0001040971 slg:A690MadisonAvenueMember 2023-12-31 0001040971 slg:A690MadisonAvenueMember 2022-12-31 0001040971 slg:SevenOneNineSeventhAvenueMember srt:WeightedAverageMember 2023-12-31 0001040971 us-gaap:LineOfCreditMember us-gaap:RevolvingCreditFacilityMember slg:RevolvingCreditFacilityMaturityMarch312022Member 2023-12-31 0001040971 slg:TermLoanAMaturityMarch312023Member slg:TermLoanMember 2023-12-31 0001040971 slg:TermLoanBMaturityNovember212024Member slg:TermLoanMember 2023-12-31 0001040971 us-gaap:LineOfCreditMember us-gaap:RevolvingCreditFacilityMember slg:RevolvingCreditFacilityMaturityMarch312022Member 2023-01-01 2023-12-31 0001040971 us-gaap:LineOfCreditMember slg:SecuredOvernightFinancingRateSOFRMember us-gaap:RevolvingCreditFacilityMember 2023-01-01 2023-12-31 0001040971 us-gaap:LineOfCreditMember slg:SecuredOvernightFinancingRateSOFRMember us-gaap:RevolvingCreditFacilityMember slg:RevolvingCreditFacilityMaturityMarch312022Member srt:MinimumMember 2023-01-01 2023-12-31 0001040971 us-gaap:LineOfCreditMember srt:MaximumMember slg:SecuredOvernightFinancingRateSOFRMember us-gaap:RevolvingCreditFacilityMember slg:RevolvingCreditFacilityMaturityMarch312022Member 2023-01-01 2023-12-31 0001040971 slg:SecuredOvernightFinancingRateSOFRMember slg:TermLoanAMaturityMarch312023Member slg:TermLoanMember srt:MinimumMember 2023-01-01 2023-12-31 0001040971 srt:MaximumMember slg:SecuredOvernightFinancingRateSOFRMember slg:TermLoanAMaturityMarch312023Member slg:TermLoanMember 2023-01-01 2023-12-31 0001040971 slg:TermLoanBMaturityNovember212024Member slg:SecuredOvernightFinancingRateSOFRMember slg:TermLoanMember srt:MinimumMember 2023-01-01 2023-12-31 0001040971 slg:TermLoanBMaturityNovember212024Member srt:MaximumMember slg:SecuredOvernightFinancingRateSOFRMember slg:TermLoanMember 2023-01-01 2023-12-31 0001040971 us-gaap:LineOfCreditMember slg:SecuredOvernightFinancingRateSOFRMember us-gaap:RevolvingCreditFacilityMember slg:RevolvingCreditFacilityMaturityMarch312022Member 2023-01-01 2023-12-31 0001040971 slg:SecuredOvernightFinancingRateSOFRMember slg:TermLoanAMaturityMarch312023Member slg:TermLoanMember 2023-01-01 2023-12-31 0001040971 slg:TermLoanBMaturityNovember212024Member slg:SecuredOvernightFinancingRateSOFRMember slg:TermLoanMember 2023-01-01 2023-12-31 0001040971 us-gaap:RevolvingCreditFacilityMember srt:MinimumMember 2023-01-01 2023-12-31 0001040971 srt:MaximumMember us-gaap:RevolvingCreditFacilityMember 2023-01-01 2023-12-31 0001040971 us-gaap:RevolvingCreditFacilityMember 2023-01-01 2023-12-31 0001040971 slg:CreditFacility2017Member 2023-12-31 0001040971 us-gaap:RevolvingCreditFacilityMember 2023-12-31 0001040971 us-gaap:LineOfCreditMember slg:CreditFacility2017Member 2023-12-31 0001040971 us-gaap:LineOfCreditMember slg:CreditFacility2017Member 2022-12-31 0001040971 slg:TermLoanMember us-gaap:LineOfCreditMember 2023-12-31 0001040971 slg:TermLoanMember us-gaap:LineOfCreditMember 2022-12-31 0001040971 us-gaap:LineOfCreditMember slg:TermLoan2022Member us-gaap:LineOfCreditMember 2023-12-31 0001040971 us-gaap:LineOfCreditMember slg:TermLoan2022Member us-gaap:LineOfCreditMember 2022-10-01 2022-10-31 slg:extensionOption 0001040971 us-gaap:LineOfCreditMember slg:TermLoan2022Member us-gaap:LineOfCreditMember 2022-10-31 0001040971 us-gaap:LineOfCreditMember slg:TermLoan2022Member us-gaap:LineOfCreditMember 2023-01-31 0001040971 us-gaap:LineOfCreditMember slg:SecuredOvernightFinancingRateSOFRMember slg:TermLoan2022Member us-gaap:LineOfCreditMember 2023-01-01 2023-12-31 0001040971 us-gaap:LineOfCreditMember slg:SecuredOvernightFinancingRateSOFRMember slg:TermLoan2022Member us-gaap:LineOfCreditMember srt:MinimumMember 2023-01-01 2023-12-31 0001040971 us-gaap:LineOfCreditMember srt:MaximumMember slg:SecuredOvernightFinancingRateSOFRMember slg:TermLoan2022Member us-gaap:LineOfCreditMember 2023-01-01 2023-12-31 0001040971 slg:SeniorUnsecuredNoteDueDecember172025Member slg:SeniorUnsecuredNotesMember 2023-12-31 0001040971 slg:SeniorUnsecuredNoteDueDecember172025Member slg:SeniorUnsecuredNotesMember 2022-12-31 0001040971 slg:SeniorUnsecuredNoteDueDecember172025Member slg:SeniorUnsecuredNotesMember 2023-01-01 2023-12-31 0001040971 slg:SeniorUnsecuredNotesMember 2023-12-31 0001040971 slg:SeniorUnsecuredNotesMember 2022-12-31 0001040971 us-gaap:JuniorSubordinatedDebtMember 2005-06-01 2005-06-30 0001040971 us-gaap:JuniorSubordinatedDebtMember slg:SecuredOvernightFinancingRateSOFRMember 2023-01-01 2023-12-31 slg:quarter 0001040971 us-gaap:CorporateJointVentureMember slg:MortgageAndOtherLoansPayableMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:CreditFacility2012Member 2023-12-31 0001040971 slg:TermLoanMember us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 us-gaap:JuniorSubordinatedDebtMember us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:SeniorNotesMember 2023-12-31 0001040971 slg:OneVanderbiltMember slg:MarcHollidayChairmanAndCEOMember us-gaap:RelatedPartyMember srt:MinimumMember 2016-12-01 2016-12-31 0001040971 slg:OneVanderbiltMember srt:MaximumMember slg:MarcHollidayChairmanAndCEOMember us-gaap:RelatedPartyMember 2016-12-01 2016-12-31 0001040971 slg:OneVanderbiltMember slg:AndrewMathiasPresidentMember us-gaap:RelatedPartyMember srt:MinimumMember 2016-12-01 2016-12-31 0001040971 slg:OneVanderbiltMember slg:AndrewMathiasPresidentMember srt:MaximumMember us-gaap:RelatedPartyMember 2016-12-01 2016-12-31 0001040971 slg:OneVanderbiltMember slg:MarcHollidayChairmanAndCEOMember 2016-12-01 2016-12-31 0001040971 slg:OneVanderbiltMember slg:AndrewMathiasPresidentMember 2016-12-01 2016-12-31 0001040971 slg:OneVanderbiltMember slg:HolidayAndMathiasMember us-gaap:RelatedPartyMember 2022-01-01 2022-12-31 0001040971 slg:OneVanderbiltMember slg:HolidayAndMathiasMember us-gaap:RelatedPartyMember 2023-01-01 2023-12-31 0001040971 slg:OneVanderbiltMember slg:PropertyInterestLiquidationMember us-gaap:RelatedPartyMember slg:HolidayMember 2022-01-01 2022-12-31 0001040971 slg:OneVanderbiltMember slg:PropertyInterestLiquidationMember slg:MathiasMember us-gaap:RelatedPartyMember 2022-01-01 2022-12-31 0001040971 slg:OneVanderbiltMember 2023-01-01 2023-12-31 0001040971 slg:OneVanderbiltMember 2022-01-01 2022-12-31 0001040971 slg:SUMMITOneVanderbiltMember 2023-01-01 2023-12-31 0001040971 slg:SUMMITOneVanderbiltMember 2022-01-01 2022-12-31 0001040971 us-gaap:OtherAffiliatesMember 2023-12-31 0001040971 us-gaap:OtherAffiliatesMember 2022-12-31 0001040971 slg:OperatingPartnershipMember srt:SubsidiariesMember 2022-12-31 0001040971 srt:PartnershipInterestMember 2022-12-31 0001040971 srt:PartnershipInterestMember 2021-12-31 0001040971 srt:PartnershipInterestMember 2023-01-01 2023-12-31 0001040971 srt:PartnershipInterestMember 2022-01-01 2022-12-31 0001040971 srt:PartnershipInterestMember 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:SeriesAPreferredStockMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:SeriesAPreferredStockMember 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:SeriesFPreferredStockMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:SeriesFPreferredStockMember 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesKPreferredStockMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesKPreferredStockMember 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesLPreferredStockMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesLPreferredStockMember 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesRPreferredStockMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesRPreferredStockMember 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesSPreferredStockMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesSPreferredStockMember 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesVPreferredStockMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesVPreferredStockMember 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesWPreferredStockMember 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:SeriesBPreferredStockMember 2023-12-31 0001040971 us-gaap:SeriesBPreferredStockMember 2023-12-31 0001040971 srt:SubsidiariesMember slg:SeriesWPreferredStockMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:PreferredStockMember 2022-12-31 0001040971 srt:SubsidiariesMember us-gaap:PreferredStockMember 2021-12-31 0001040971 srt:SubsidiariesMember us-gaap:PreferredStockMember 2023-01-01 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:PreferredStockMember 2022-01-01 2022-12-31 0001040971 srt:SubsidiariesMember us-gaap:PreferredStockMember 2023-12-31 0001040971 srt:SubsidiariesMember us-gaap:CommonStockMember 2023-12-31 0001040971 slg:A2016RepurchaseProgramMember 2016-08-31 0001040971 slg:A2016RepurchaseProgramMember 2023-01-01 2023-12-31 slg:increase 0001040971 slg:A2016RepurchaseProgramMember 2018-12-31 0001040971 slg:A2016RepurchaseProgramMember 2020-12-31 0001040971 slg:A2016RepurchaseProgramMember 2019-12-31 0001040971 slg:A2016RepurchaseProgramMember 2018-06-30 0001040971 slg:A2016RepurchaseProgramMember 2017-12-31 0001040971 slg:A2016RepurchaseProgramMember 2023-12-31 0001040971 slg:A2016RepurchaseProgramMember 2021-01-01 2021-12-31 0001040971 slg:A2016RepurchaseProgramMember 2022-01-01 2022-12-31 0001040971 slg:SeriesIPreferredStockMember 2023-01-01 2023-12-31 0001040971 slg:SeriesIPreferredStockMember 2012-08-01 2012-08-31 0001040971 slg:DividendReinvestmentAndStockPurchasePlanMember 2021-02-28 0001040971 slg:DividendReinvestmentAndStockPurchasePlanMember 2023-01-01 2023-12-31 0001040971 slg:DividendReinvestmentAndStockPurchasePlanMember 2022-01-01 2022-12-31 0001040971 slg:DividendReinvestmentAndStockPurchasePlanMember 2021-01-01 2021-12-31 0001040971 2023-10-01 2023-12-31 0001040971 slg:SeriesIPreferredStockMember srt:SubsidiariesMember 2023-01-01 2023-12-31 0001040971 slg:FourthAmendedandRestated2003StockOptionandIncentivePlanMember 2023-12-31 slg:fungibleUnit slg:unit xbrli:shares 0001040971 slg:StockOptionsStockAppreciationRightsAndOtherAwardsMember 2023-01-01 2023-12-31 0001040971 slg:StockOptionsStockAppreciationRightsAndOtherAwardsMember 2023-12-31 0001040971 slg:OtherAwardsMember 2023-01-01 2023-12-31 0001040971 slg:OtherAwardsMember 2023-12-31 0001040971 us-gaap:EmployeeStockOptionMember srt:MinimumMember 2023-01-01 2023-12-31 0001040971 srt:MaximumMember us-gaap:EmployeeStockOptionMember 2023-01-01 2023-12-31 0001040971 us-gaap:EmployeeStockOptionMember 2023-01-01 2023-12-31 0001040971 slg:ClassOLTIPUnitsMember 2023-12-31 0001040971 us-gaap:EmployeeStockOptionMember 2022-01-01 2022-12-31 0001040971 us-gaap:EmployeeStockOptionMember 2021-01-01 2021-12-31 0001040971 us-gaap:EmployeeStockOptionMember 2022-12-31 0001040971 us-gaap:EmployeeStockOptionMember 2021-12-31 0001040971 us-gaap:EmployeeStockOptionMember 2020-12-31 0001040971 us-gaap:EmployeeStockOptionMember 2023-12-31 0001040971 us-gaap:EmployeeStockMember slg:ThirdAmendmentandRestated2005StockOptionandIncentivePlanMember 2022-01-01 2022-12-31 0001040971 us-gaap:EmployeeStockMember slg:ThirdAmendmentandRestated2005StockOptionandIncentivePlanMember 2021-01-01 2021-12-31 0001040971 us-gaap:EmployeeStockMember slg:ThirdAmendmentandRestated2005StockOptionandIncentivePlanMember 2023-01-01 2023-12-31 0001040971 us-gaap:RestrictedStockMember 2023-01-01 2023-12-31 0001040971 us-gaap:RestrictedStockMember 2022-12-31 0001040971 us-gaap:RestrictedStockMember 2021-12-31 0001040971 us-gaap:RestrictedStockMember 2020-12-31 0001040971 us-gaap:RestrictedStockMember 2022-01-01 2022-12-31 0001040971 us-gaap:RestrictedStockMember 2021-01-01 2021-12-31 0001040971 us-gaap:RestrictedStockMember 2023-12-31 0001040971 slg:LongTermIncentivePlanUnitsMember 2023-01-01 2023-12-31 0001040971 slg:LongTermIncentivePlanUnitsMember 2022-01-01 2022-12-31 0001040971 us-gaap:PerformanceSharesMember 2023-12-31 0001040971 us-gaap:PerformanceSharesMember 2023-01-01 2023-12-31 0001040971 us-gaap:PerformanceSharesMember 2022-01-01 2022-12-31 0001040971 us-gaap:PerformanceSharesMember 2021-01-01 2021-12-31 0001040971 slg:DeferredStockCompensationPlanForDirectorsMember 2023-12-31 0001040971 slg:DeferredStockCompensationPlanForDirectorsMember 2023-01-01 2023-12-31 0001040971 us-gaap:EmployeeStockMember 2023-12-31 0001040971 us-gaap:EmployeeStockMember 2023-01-01 2023-12-31 0001040971 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2020-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2020-12-31 0001040971 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2020-12-31 0001040971 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2021-01-01 2021-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2021-01-01 2021-12-31 0001040971 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2021-01-01 2021-12-31 0001040971 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2021-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2021-12-31 0001040971 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2021-12-31 0001040971 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2022-01-01 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2022-01-01 2022-12-31 0001040971 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2022-01-01 2022-12-31 0001040971 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2022-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2022-12-31 0001040971 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2022-12-31 0001040971 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2023-01-01 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2023-01-01 2023-12-31 0001040971 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2023-01-01 2023-12-31 0001040971 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2023-12-31 0001040971 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2023-12-31 0001040971 us-gaap:FairValueInputsLevel1Member us-gaap:EquitySecuritiesMember 2023-12-31 0001040971 us-gaap:FairValueInputsLevel2Member us-gaap:CommercialMortgageBackedSecuritiesMember 2023-12-31 0001040971 us-gaap:FairValueInputsLevel3Member 2023-12-31 0001040971 us-gaap:FairValueInputsLevel1Member 2023-12-31 0001040971 us-gaap:FairValueInputsLevel2Member 2023-12-31 0001040971 slg:AccruedInterestPayableAndOtherMember 2023-12-31 0001040971 slg:AccruedInterestPayableAndOtherMember us-gaap:FairValueInputsLevel1Member 2023-12-31 0001040971 us-gaap:FairValueInputsLevel2Member slg:AccruedInterestPayableAndOtherMember 2023-12-31 0001040971 slg:AccruedInterestPayableAndOtherMember us-gaap:FairValueInputsLevel3Member 2023-12-31 0001040971 us-gaap:FairValueInputsLevel1Member us-gaap:EquitySecuritiesMember 2022-12-31 0001040971 us-gaap:FairValueInputsLevel2Member us-gaap:CommercialMortgageBackedSecuritiesMember 2022-12-31 0001040971 us-gaap:FairValueInputsLevel3Member 2022-12-31 0001040971 us-gaap:FairValueInputsLevel1Member 2022-12-31 0001040971 us-gaap:FairValueInputsLevel2Member 2022-12-31 0001040971 slg:AccruedInterestPayableAndOtherMember 2022-12-31 0001040971 slg:AccruedInterestPayableAndOtherMember us-gaap:FairValueInputsLevel1Member 2022-12-31 0001040971 us-gaap:FairValueInputsLevel2Member slg:AccruedInterestPayableAndOtherMember 2022-12-31 0001040971 slg:AccruedInterestPayableAndOtherMember us-gaap:FairValueInputsLevel3Member 2022-12-31 0001040971 us-gaap:FairValueInputsLevel3Member us-gaap:CarryingReportedAmountFairValueDisclosureMember 2023-12-31 0001040971 us-gaap:FairValueInputsLevel3Member us-gaap:CarryingReportedAmountFairValueDisclosureMember 2022-12-31 0001040971 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2023-12-31 0001040971 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member 2023-12-31 0001040971 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2022-12-31 0001040971 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member 2022-12-31 0001040971 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2023-12-31 0001040971 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2022-12-31 0001040971 slg:VariableRateDebtMember 2023-12-31 0001040971 slg:InterestRateSwapExpiringJanuary2024Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringInJanuary20242Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringInJanuary20243Member 2023-12-31 0001040971 slg:InterestRateCapExpiringJune2024Member 2023-12-31 0001040971 slg:InterestRateCapExpiringInJune20242Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringJanuary2026Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringJanuary20262Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringInFebruary2027Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringInFebruary20272Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringInFebruary20273Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringInFebruary20274Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringInMay2027Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringInMay20272Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringInJune2027Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringInNovember2027Member 2023-12-31 0001040971 slg:InterestRateSwapExpiringInJanuary2028Member 2023-12-31 0001040971 us-gaap:InterestRateContractMember 2023-12-31 0001040971 us-gaap:InterestRateCapMember 2023-01-01 2023-12-31 0001040971 us-gaap:InterestRateCapMember 2022-01-01 2022-12-31 0001040971 us-gaap:InterestRateCapMember 2021-01-01 2021-12-31 slg:derivative 0001040971 us-gaap:InterestExpenseMember 2023-01-01 2023-12-31 0001040971 us-gaap:InterestExpenseMember 2022-01-01 2022-12-31 0001040971 us-gaap:InterestExpenseMember 2021-01-01 2021-12-31 0001040971 slg:IncomeLossFromEquityMethodInvestmentsMember 2023-01-01 2023-12-31 0001040971 us-gaap:InterestRateContractMember 2023-01-01 2023-12-31 0001040971 us-gaap:InterestRateContractMember 2022-01-01 2022-12-31 0001040971 us-gaap:InterestRateContractMember 2021-01-01 2021-12-31 0001040971 slg:InterestRateCapExpiringFebruary2024Member us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 slg:InterestRateCapExpiringMay2024Member us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 slg:InterestRateCapExpiringMay20242Member us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 slg:InterestRateCapExpiringJune2024Member us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:InterestRateCapExpiringAugust2024Member 2023-12-31 0001040971 slg:InterestRateCapExpiringSeptember2024Member us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 slg:InterestRateCapExpiringNovember2024Member us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 slg:InterestRateCapExpiringNovember20242Member us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:InterestRateSwapExpiringFebruary2026Member 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:InterestRateSwapExpiringFebruary20262Member 2023-12-31 0001040971 us-gaap:CorporateJointVentureMember slg:InterestRateSwapExpiringFebruary20263Member 2023-12-31 0001040971 us-gaap:InterestRateContractMember us-gaap:CorporateJointVentureMember 2023-12-31 0001040971 us-gaap:PensionPlansDefinedBenefitMember 2023-01-01 2023-12-31 0001040971 us-gaap:PensionPlansDefinedBenefitMember 2022-07-01 2023-06-30 0001040971 us-gaap:PensionPlansDefinedBenefitMember 2021-07-01 2022-06-30 0001040971 us-gaap:PensionPlansDefinedBenefitMember 2020-07-01 2021-06-30 0001040971 us-gaap:DefinedBenefitPostretirementHealthCoverageMember 2022-07-01 2023-06-30 0001040971 us-gaap:DefinedBenefitPostretirementHealthCoverageMember 2021-07-01 2022-06-30 0001040971 us-gaap:DefinedBenefitPostretirementHealthCoverageMember 2020-07-01 2021-06-30 0001040971 us-gaap:DefinedBenefitPostretirementHealthCoverageMember 2023-01-01 2023-12-31 0001040971 us-gaap:PensionPlansDefinedBenefitMember 2022-01-01 2022-12-31 0001040971 us-gaap:PensionPlansDefinedBenefitMember 2021-01-01 2021-12-31 0001040971 us-gaap:DefinedBenefitPostretirementHealthCoverageMember 2022-01-01 2022-12-31 0001040971 us-gaap:DefinedBenefitPostretirementHealthCoverageMember 2021-01-01 2021-12-31 0001040971 us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember 2023-01-01 2023-12-31 0001040971 us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember 2022-01-01 2022-12-31 0001040971 us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember 2021-01-01 2021-12-31 0001040971 slg:BelmontInsuranceCompanyMember 2023-12-31 0001040971 slg:BelmontInsuranceCompanyMember 2022-12-31 0001040971 slg:TiconderogaInsuranceCompanyMember 2022-12-31 0001040971 slg:TiconderogaInsuranceCompanyMember 2023-12-31 0001040971 slg:ThirdAvenue711Member 2023-12-31 0001040971 slg:RealEstateSegmentMember us-gaap:OperatingSegmentsMember 2023-01-01 2023-12-31 0001040971 slg:SUMMITSegmentMember us-gaap:OperatingSegmentsMember 2023-01-01 2023-12-31 0001040971 slg:DebtAndPreferredEquitySegmentMember us-gaap:OperatingSegmentsMember 2023-01-01 2023-12-31 0001040971 slg:RealEstateSegmentMember us-gaap:OperatingSegmentsMember 2022-01-01 2022-12-31 0001040971 slg:SUMMITSegmentMember us-gaap:OperatingSegmentsMember 2022-01-01 2022-12-31 0001040971 slg:DebtAndPreferredEquitySegmentMember us-gaap:OperatingSegmentsMember 2022-01-01 2022-12-31 0001040971 slg:RealEstateSegmentMember us-gaap:OperatingSegmentsMember 2021-01-01 2021-12-31 0001040971 slg:SUMMITSegmentMember us-gaap:OperatingSegmentsMember 2021-01-01 2021-12-31 0001040971 slg:DebtAndPreferredEquitySegmentMember us-gaap:OperatingSegmentsMember 2021-01-01 2021-12-31 0001040971 slg:RealEstateSegmentMember us-gaap:OperatingSegmentsMember 2023-12-31 0001040971 slg:SUMMITSegmentMember us-gaap:OperatingSegmentsMember 2023-12-31 0001040971 slg:DebtAndPreferredEquitySegmentMember us-gaap:OperatingSegmentsMember 2023-12-31 0001040971 slg:RealEstateSegmentMember us-gaap:OperatingSegmentsMember 2022-12-31 0001040971 slg:SUMMITSegmentMember us-gaap:OperatingSegmentsMember 2022-12-31 0001040971 slg:DebtAndPreferredEquitySegmentMember us-gaap:OperatingSegmentsMember 2022-12-31 0001040971 slg:LexingtonAvenue420Member 2023-12-31 0001040971 slg:ThirdAvenue711Member 2023-12-31 0001040971 slg:W57Street555Member 2023-12-31 0001040971 slg:FifthAvenue461Member 2023-12-31 0001040971 slg:ThirdAvenue750Member 2023-12-31 0001040971 slg:LexingtonAvenue485Member 2023-12-31 0001040971 slg:SeventhAvenue810Member 2023-12-31 0001040971 slg:AvenueOfTheAmericas1185Member 2023-12-31 0001040971 slg:AvenueOfTheAmericas1350Member 2023-12-31 0001040971 slg:LandmarkSquare1To6Member 2023-12-31 0001040971 slg:LandmarkSquare7Member 2023-12-31 0001040971 slg:ChurchStreet100Member 2023-12-31 0001040971 slg:ParkAvenue125Member 2023-12-31 0001040971 slg:A19East65thStreetMember 2023-12-31 0001040971 slg:ParkAvenue304Member 2023-12-31 0001040971 slg:A752760MadisonAvenueMember 2023-12-31 0001040971 slg:SevenOneNineSeventhAvenueMember 2023-12-31 0001040971 slg:A110GreeneStreetMember 2023-12-31 0001040971 slg:A185BroadwayMember 2023-12-31 0001040971 slg:ThirdAvenue885Member 2023-12-31 0001040971 slg:A690MadisonAvenueMember 2023-12-31 0001040971 slg:OtherPropertyInvestmentsMember 2023-12-31 0001040971 slg:SevenOneNineSeventhAvenueMember slg:SevenOneNineSeventhAvenueMember 2023-12-31

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
______________________________________________________________________
FORM 10-K
☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2023
OR
☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from to
Commission File Number: 1-13199 (SL Green Realty Corp.)
Commission File Number: 33-167793-02 (SL Green Operating Partnership, L.P.)
______________________________________________________________________
SL GREEN REALTY CORP.
SL GREEN OPERATING PARTNERSHIP, L.P.
(Exact name of registrant as specified in its charter)
______________________________________________________________________

SL Green Realty Corp. | Maryland | 13-3956775
SL Green Operating Partnership, L.P. | Delaware | 13-3960938
| (State or other jurisdiction of incorporation or organization) | (I.R.S. Employer Identification No.)

One Vanderbilt Avenue, New York, NY 10017
(Address of principal executive offices—Zip Code)
(212) 594-2700
(Registrant's telephone number, including area code)
______________________________________________________________________
SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT:

Registrant |  | Trading Symbol |  | Title of Each Class |  | Name of Each Exchange on Which Registered
SL Green Realty Corp. |  | SLG |  | Common Stock, $0.01 par value |  | New York Stock Exchange
SL Green Realty Corp. |  | SLG.PRI |  | 6.500% Series I Cumulative Redeemable Preferred Stock, $0.01 par value |  | New York Stock Exchange

SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT: None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.
SL Green Realty Corp. Yes x No o SL Green Operating Partnership, L.P. Yes o No x
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.
SL Green Realty Corp. Yes o No x SL Green Operating Partnership, L.P. Yes o No x
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.
SL Green Realty Corp. Yes x No o SL Green Operating Partnership, L.P. Yes x No o
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).
SL Green Realty Corp. Yes x No o SL Green Operating Partnership, L.P. Yes x No o
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.
SL Green Realty Corp.

Large Accelerated Filer | x |  | Accelerated Filer | o
Non-Accelerated Filer | o |  |
Smaller Reporting Company | ☐ |  | Emerging Growth Company | ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. | o
Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. | ☒

SL Green Operating Partnership, L.P.

Large Accelerated Filer | o |  | Accelerated Filer | o
Non-accelerated filer | x |  |
Smaller Reporting Company | ☐ |  | Emerging Growth Company | ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. | o
Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. | ☒
If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. | o
Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). | o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).
SL Green Realty Corp. Yes ☐ No x SL Green Operating Partnership, L.P. Yes ☐ No x
The aggregate market value of the common stock held by non-affiliates of SL Green Realty Corp. (57,620,886 shares) was $1.7 billion based on the quoted closing price on the New York Stock Exchange for such shares on June 30, 2023.
As of February 22, 2024, 64,799,013 shares of SL Green Realty Corp.'s common stock, par value $0.01 per share, were outstanding. As of February 22, 2024, 306,110 common units of limited partnership interest of SL Green Operating Partnership, L.P. were held by non-affiliates. There is no established trading market for such units.
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the SL Green Realty Corp.'s Proxy Statement for its 2024 Annual Stockholders' Meeting to be filed within 120 days after the end of the Registrant's fiscal year are incorporated by reference into Part III of this Annual Report on Form 10-K.

EXPLANATORY NOTE
This report combines the annual reports on Form 10-K for the year ended December 31, 2023 of SL Green Realty Corp. and SL Green Operating Partnership, L.P. Unless stated otherwise or the context otherwise requires, references to "SL Green Realty Corp.," the "Company" or "SL Green" mean SL Green Realty Corp. and its consolidated subsidiaries, including SL Green Operating Partnership, L.P.; and references to "SL Green Operating Partnership, L.P.," the "Operating Partnership" or "SLGOP" mean SL Green Operating Partnership, L.P. and its consolidated subsidiaries. The terms "we," "our" and "us" mean the Company and all the entities owned or controlled by the Company, including the Operating Partnership.
The Company is a Maryland corporation which operates as a self-administered and self-managed real estate investment trust, or REIT, and is the sole managing general partner of the Operating Partnership. As a general partner of the Operating Partnership, the Company has full, exclusive and complete responsibility and discretion in the day-to-day management and control of the Operating Partnership.
As of December 31, 2023, the Company owns 94.25% of the outstanding general and limited partnership interest in the Operating Partnership and owns 9,200,000 Series I Preferred Units of the Operating Partnership. As of December 31, 2023, noncontrolling investors held, in aggregate, a 5.75% limited partnership interest in the Operating Partnership. We refer to these interests as the noncontrolling interests in the Operating Partnership.
The Company and the Operating Partnership are managed and operated as one entity. The financial results of the Operating Partnership are consolidated into the financial statements of the Company. The Company has no significant assets other than its investment in the Operating Partnership. Substantially all of our assets are held by, and our operations are conducted through, the Operating Partnership. Therefore, the assets and liabilities of the Company and the Operating Partnership are substantially the same.
Noncontrolling interests in the Operating Partnership, stockholders' equity of the Company and partners' capital of the Operating Partnership are the main areas of difference between the consolidated financial statements of the Company and those of the Operating Partnership. The common limited partnership interests in the Operating Partnership not owned by the Company are accounted as noncontrolling interests, within mezzanine equity, in the Company's and the Operating Partnership's consolidated financial statements.
We believe combining the annual reports on Form 10-K of the Company and the Operating Partnership into this single report results in the following benefits:
•Combined reports enhance investors' understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;
•Combined reports eliminate duplicative disclosure and provides a more streamlined and readable presentation since a substantial portion of the Company's disclosure applies to both the Company and the Operating Partnership; and
•Combined reports create time and cost efficiencies through the preparation of one combined report instead of two separate reports.
To help investors understand the significant differences between the Company and the Operating Partnership, this report presents the following separate sections for each of the Company and the Operating Partnership:
•consolidated financial statements; and
•the following notes to the consolidated financial statements:
◦Note 11, Noncontrolling Interests on the Company’s Consolidated Financial Statements;
◦Note 12, Stockholders' Equity of the Company; and
◦Note 13, Partners' Capital of the Operating Partnership;
This report also includes separate Part II, Item 5. Market for Registrants' Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities, and Item 9A. Controls and Procedures sections and separate Exhibit 31 and 32 certifications for each of the Company and the Operating Partnership, respectively, in order to establish that the Chief Executive Officer and the Chief Financial Officer of the Company, in both their capacity as the principal executive officer and principal financial officer of the Company and the principal executive officer and principal financial officer of the general partner of the Operating Partnership, have made the requisite certifications and that the Company and the Operating Partnership are compliant with Rule 13a-15 and Rule 15d-15 of the Securities Exchange Act of 1934, as amended, or the Exchange Act.

SL GREEN REALTY CORP. AND SL GREEN OPERATING PARTNERSHIP, L.P.
TABLE OF CONTENTS

PART I |
Item 1. | Business | 4
Item 1A. | Risk Factors | 13
Item 1B. | Unresolved Staff Comments | 24
Item 1C. | Cybersecurity | 24
Item 2. | Properties | 25
Item 3. | Legal Proceedings | 31
Item 4. | Mine Safety Disclosures | 31
PART II |  |
Item 5. | Market for Registrants' Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities | 32
Item 6. | Reserved | 32
Item 7. | Management's Discussion and Analysis of Financial Condition and Results of Operations | 33
Item 7A. | Quantitative and Qualitative Disclosures about Market Risk | 53
Item 8. | Financial Statements and Supplementary Data | 55
Item 9. | Changes in and Disagreements with Accountants on Accounting and Financial Disclosure | 125
Item 9A. | Controls and Procedures | 126
Item 9B. | Other Information | 130
Item 9C. | Disclosure Regarding Foreign Jurisdictions that Prevent Inspections | 131
PART III |
Item 10. | Directors, Executive Officers and Corporate Governance | 132
Item 11. | Executive Compensation | 132
Item 12. | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters | 132
Item 13. | Certain Relationships and Related Transactions, and Director Independence | 132
Item 14. | Principal Accountant Fees and Services | 132
PART IV |
Item 15. | Exhibits, Financial Statements and Schedules | 133
| SIGNATURES | 138

Table of Contents
PART I
ITEM 1. BUSINESS
General
SL Green Realty Corp. is a self-managed real estate investment trust, or REIT, engaged in the ownership, management, operation, acquisition, development, redevelopment and repositioning of commercial real estate properties, principally office properties, located in the New York metropolitan area, principally in Manhattan, a borough of New York City. We were formed in June, 1997 for the purpose of continuing the commercial real estate business of S.L. Green Properties, Inc., our predecessor entity. S.L. Green Properties, Inc., which was founded in 1980 by Stephen L. Green, who serves as a member and the chairman emeritus of the Company's board of directors, had been engaged in the business of owning, managing, leasing, and repositioning office properties in Manhattan.
As of December 31, 2023, we owned the following interests in properties in the New York metropolitan area, primarily in midtown Manhattan. Our investments located outside of Manhattan are referred to as the Suburban properties:

|  |  |  | Consolidated |  | Unconsolidated |  | Total
Location |  | Property Type |  | Number of Properties |  | Approximate Square Feet |  | Number of Properties |  | Approximate Square Feet |  | Number of Properties |  | Approximate Square Feet |  | Weighted Average Leased Occupancy(1)
Commercial: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Manhattan |  | Office |  | 13 |  | (2) | 8,399,141 |  |  | 12 |  |  | 15,412,174 |  |  | 25 |  | (2) | 23,811,315 |  | (2) | 89.4 | %
|  | Retail |  | 3 |  | (2) | 40,536 |  |  | 7 |  |  | 281,796 |  |  | 10 |  | (2) | 322,332 |  | (2) | 91.2 | %
|  | Development/Redevelopment |  | 3 |  | (3) | 1,443,771 |  |  | 3 |  |  | 2,893,357 |  |  | 6 |  | (2) | 4,337,128 |  | (2) | N/A
|  |  |  | 19 |  |  | 9,883,448 |  |  | 22 |  |  | 18,587,327 |  |  | 41 |  |  | 28,470,775 |  |  | 89.5 | %
Suburban |  | Office |  | 7 |  |  | 862,800 |  |  | — |  |  | — |  |  | 7 |  |  | 862,800 |  |  | 77.1 | %
Total commercial properties |  | 26 |  |  | 10,746,248 |  |  | 22 |  |  | 18,587,327 |  |  | 48 |  |  | 29,333,575 |  |  | 89.0 | %
Residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Manhattan |  | Residential |  | 1 |  | (3) | 140,382 |  |  | 1 |  |  | 221,884 |  |  | 2 |  |  | 362,266 |  |  | 99.0 | %
Total portfolio |  | 27 |  |  | 10,886,630 |  |  | 23 |  |  | 18,809,211 |  |  | 50 |  |  | 29,695,841 |  |  | 89.2 | %

(1)The weighted average leased occupancy for commercial properties represents the total leased square footage divided by total square footage at acquisition. The weighted average leased occupancy for residential properties represents the total leased units divided by total available units. Properties under construction are not included in the calculation of weighted average leased occupancy.
(2)Includes assets within the Company's alternative strategy portfolio. Within that portfolio, office includes one building totaling 2,048,725 square feet, retail includes eight buildings totaling 286,738 square feet and development/redevelopment includes two buildings totaling 1,496,931 square feet.
(3)As of December 31, 2023, we owned a building at 7 Dey Street / 185 Broadway that was comprised of approximately 140,382 square feet (unaudited) of residential space and approximately 50,206 square feet (unaudited) of office and retail space. For the purpose of this report, we have included this building in the number of residential properties we own. However, we have included only the residential square footage in the residential approximate square footage, and have listed the balance of the square footage as development square footage.
As of December 31, 2023, we also managed one office building and one retail building owned by a third party encompassing approximately 0.4 million square feet, and held debt and preferred equity investments with a book value of $346.7 million, excluding debt and preferred equity investments and other financing receivables totaling $7.9 million that are included in balance sheet line items other than the Debt and preferred equity investments line item.
Our corporate offices are located in midtown Manhattan at One Vanderbilt Avenue, New York, New York 10017. As of December 31, 2023, we employed 1,188 employees, 308 of whom were employed in our corporate offices. We maintain a website at www.slgreen.com and can be contacted at (212) 594-2700 or by email at investor.relations@slgreen.com. On our website, you can obtain, free of charge, a copy of our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after we file such material electronically with, or furnish it to, the Securities and Exchange Commission, or the SEC. We have also made available on our website our audit committee charter, compensation committee charter, nominating and corporate governance committee charter, code of business conduct and ethics and corporate governance principles. We do not intend for information contained on our website to be part of this annual report on Form 10-K. The SEC maintains a website (http://www.sec.gov) that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.
4

Table of Contents
Unless the context requires otherwise, all references to the "Company," "SL Green," "we," "our" and "us" in this annual report means SL Green Realty Corp., a Maryland corporation, and one or more of its subsidiaries, including the Operating Partnership, or, as the context may require, SL Green only or the Operating Partnership only, and "S.L. Green Properties" means S.L. Green Properties, Inc., a New York corporation, as well as the affiliated partnerships and other entities through which Stephen L. Green historically conducted commercial real estate activities.
Corporate Structure
In connection with the Company's initial public offering, or IPO, in August 1997, the Operating Partnership received a contribution of interests in real estate properties as well as a 95% economic, non-voting interest in the management, leasing and construction companies affiliated with S.L. Green Properties. We refer to these management, leasing and construction entities, which are owned by S.L. Green Management Corp, as the "Service Corporation." The Company is organized so as to qualify, and has elected to qualify as a REIT, under the Internal Revenue Code of 1986, as amended, or the Code.
Substantially all of our assets are held by, and all of our operations are conducted through, the Operating Partnership. We are the sole managing general partner of the Operating Partnership, and as of December 31, 2023, we owned 94.25% of its economic interests. All of the management and leasing operations with respect to our wholly-owned properties are conducted through SL Green Management LLC, or Management LLC. The Operating Partnership owns 100% of Management LLC.
In order to maintain the Company's qualification as a REIT while realizing income from management, leasing and construction contracts with third parties and joint venture properties, all of these service operations are conducted through the S.L. Green Management Corp, or the Service Corporation, a consolidated variable interest entity. We, through our Operating Partnership, receive substantially all of the cash flow from the Service Corporation's operations. All of the voting common stock of the Service Corporation is held by an entity owned and controlled by Stephen L. Green, who serves as a member and as the chairman emeritus of the Company's Board of Directors.
Business and Growth Strategies
SL Green, Manhattan's largest owner of office real estate, is focused primarily on the ownership, management, operation, acquisition, development, redevelopment and repositioning of Manhattan commercial properties, principally office properties.
Our primary business objective is to maximize the total return to stockholders, through dividends, earnings and asset value appreciation. The commercial real estate expertise resulting from owning, operating, investing, developing, redeveloping and lending on real estate in Manhattan for many decades has enabled us to invest in a collection of premier office properties, selected retail and residential assets, and high-quality debt and preferred equity investments.
We are led by a strong, experienced management team that provides a foundation of skills in all aspects of real estate. It is with this team that we have achieved a market leading position in our targeted submarkets.
We seek to enhance the value of our company by executing strategies that include the following:
•Leasing and property management, which capitalizes on our extensive presence and knowledge of the marketplaces in which we operate;
•Acquiring properties and employing our local market skills to reposition these assets to create incremental cash flow and value appreciation;
•Identifying properties well suited for development/redevelopment in order to maximize the value of those properties through development/redevelopment or reconfiguration to match current workplace, retail and housing trends;
•Investing in debt and preferred equity positions that generate consistently strong risk-adjusted returns, increase the breadth of our market insight, foster key market relationships and source potential future investment opportunities;
•Executing dispositions through sales or joint ventures that harvest embedded equity which has been generated through management's value enhancing activities; and
•Maintaining a prudently levered, liquid balance sheet with consistent access to diversified sources of property level and corporate capital.
5

Table of Contents
Leasing and Property Management
We seek to capitalize on our management's extensive knowledge of Manhattan and the New York metropolitan area and the needs of our tenants through proactive leasing and management programs, which include: (i) use of in-depth market experience resulting from managing and leasing tens of millions of square feet of office, retail and residential space since the Company was founded; (ii) careful tenant management, which results in a high tenant retention rate, long average lease terms and a manageable lease expiration schedule; (iii) utilization of an extensive network of third-party brokers to supplement our in-house leasing team; (iv) use of comprehensive building management analysis and planning; and (v) a commitment to tenant satisfaction by understanding and appreciating our tenant's businesses and the environment in which they are operating, while providing high quality tenant services at competitive rental rates.
Property Acquisitions
We acquire properties for long-term value appreciation and earnings growth. This strategy has resulted in capital gains that increase our investment capital base. In implementing this strategy, we continually evaluate potential acquisition opportunities. These opportunities may come from new properties as well as the acquisition of properties in which we already hold a joint venture interest or, from time to time, from our debt and preferred equity investments.
Through intimate knowledge of our market, we have developed an ability to source transactions with superior risk-adjusted returns by capturing off-market opportunities. In rising markets, we primarily seek to acquire strategic vacancies that provide the opportunity to take advantage of our exceptional leasing and repositioning capabilities to increase cash flow and property value. In stable or falling markets, we primarily target assets featuring credit tenancies with fully escalated in-place rents to provide cash flow stability near-term and the opportunity for increases over time.
We believe that we have many advantages over our competitors in acquiring core and non-core properties, both directly and through our joint venture program that includes a predominance of high-quality institutional investors. Those advantages include: (i) senior management's long-tenured experience leading a full-service, fully integrated real estate company focused, principally, on the Manhattan market; (ii) the ability to offer tax-efficient structures to sellers through the exchange of ownership interests, including units in our Operating Partnership; and (iii) the ability to underwrite and close transactions on an expedited basis even when the transaction involves a complicated structure.
Property Dispositions
We continually evaluate our portfolio to identify those properties that are most likely to meet our long-term earnings and cash flow growth objectives and contribute to increasing portfolio value. Properties that no longer meet our objectives are evaluated for sale or joint venture, to release equity created through management's value enhancement programs or to take advantage of attractive market valuations.
We seek to efficiently deploy the capital proceeds generated from these dispositions into other property acquisitions, development or redevelopment projects or debt and preferred equity investments that we expect will provide enhanced future capital gains and earnings growth opportunities. Management may also elect to utilize the capital proceeds from these dispositions to repurchase shares of our common stock, repay existing indebtedness of the Company or its subsidiaries, or increase cash liquidity.
Property Repositioning
Our extensive knowledge of the market in which we operate and our ability to efficiently plan and execute capital projects provide the expertise to enhance returns by repositioning properties that are underperforming. Many of the properties we own or seek to acquire feature unique architectural design elements or other amenities and characteristics that can be appealing to tenants when fully exploited. Our strategic investment in these properties, combined with our active management and pro-active leasing, provide the opportunity to creatively meet market needs and generate favorable returns.
Development / Redevelopment
Our constant interactions with tenants and other market participants keep us abreast of innovations in workplace layout, amenitization, store design and smart living. We leverage this information to identify properties primed for development or redevelopment to meet these demands and unlock value. The expertise and relationships that we have built from managing complex construction projects in New York City and its surrounding areas allow us to cost efficiently add new and renovated assets of the highest quality and desirability to our operating portfolio.
6

Table of Contents
Debt and Preferred Equity Investments
We invest in well-collateralized debt and preferred equity investments in the markets in which we operate, principally New York City, that generate attractive yields. See Note 5, "Debt and Preferred Equity Investments," in the accompanying consolidated financial statements. Knowledge of our markets and our leasing and asset management expertise provide underwriting capabilities that enable a highly educated assessment of risk and return. The benefits of this investment program, which has a carefully managed aggregate size, include the following:
•Our typical investments provide high current returns at conservative exposure levels and, in certain cases, the potential for future capital gains. Our expertise and operating capabilities provide both insight and operating skills that mitigate risk.
•In certain instances, these investments may serve as a potential source of real estate acquisitions for us. Property owners may also provide us the opportunity to consider off-market transactions involving other properties because we have previously provided debt or preferred equity financing to them.
•Our debt and preferred equity investment strategy is concentrated in Manhattan, which helps us gain market insight, awareness of upcoming investment opportunities and foster key relationships that may provide access to future investment opportunities.
Capital Resources
Our objective is to maintain multiple sources of efficient corporate and property level capital. This objective is supported by:
•Property operations that generally provide stable cash flows through market cycles, long average lease terms, high credit quality tenants and superior leasing, operating and asset management skills;
•Concentration of our activities in a Manhattan market that is consistently attractive to property investors and lenders through market cycles relative to other markets;
•Maintaining strong corporate liquidity and careful management of future debt maturities; and
•Maintaining access to corporate capital markets through balanced financing and investment activities that result in strong balance sheet and cash flow metrics.
Experience at SUMMIT
SUMMIT One Vanderbilt is an observation deck that offers panoramic views of New York while immersing its visitors in an art experience. SUMMIT opened in October 2021 and welcomed approximately 2.1 million and 1.6 million visitors for the years ended December 31, 2023 and 2022, respectively. Our constant focus and assessment of customer experience includes monitoring crowd volume and wait times for our attractions and services at SUMMIT, allowing us to maximize revenue per customer and adjust operating hours to meet the demand of peak reservation times during the week.
Manhattan Office Market Overview
Manhattan is the largest office market in the United States containing more rentable square feet than the next four largest central business district office markets combined. According to Cushman and Wakefield Research Services, as of December 31, 2023, Manhattan has a total office inventory of approximately 418.9 million square feet, including 263.1 million square feet in midtown. The properties in our portfolio are primarily concentrated in some of Manhattan's most prominent midtown locations.
While the near-term addition of new supply to the Manhattan office inventory is expected to be nominal relative to the size of the overall market, we view new supply in locations near a variety of transportation options as a positive to the Manhattan office market given the older vintage of the majority of Manhattan’s office inventory and the increasing desire of tenants to occupy new, high quality, efficient office space that provides for easy commutability for their employees.
7

Table of Contents
According to Cushman and Wakefield Research Services, the total volume of leases signed in Manhattan for the years ended December 31, 2023 and 2022 was 18.0 million and 24.3 million square feet, respectively. Overall average asking rents in Manhattan increased in 2023 by 2.4% from $71.62 per square foot as of December 31, 2022 to $73.33 per square foot as of December 31, 2023, while Manhattan Class A asking rents increased to $80.98 per square foot, up 2.9% from $78.72 as of December 31, 2022. In addition, certain tenant industries saw an increase in leasing volume during the year. Manhattan's diverse tenant base is exemplified by the following tables, which show the percentage of leasing volume attributable to each industry:

|  | Percent of Manhattan Leasing Volume (1)
Industry |  | 2023 |  | 2022
Financial Services |  | 39.1 | % |  | 40.1 | %
Legal Services |  | 17.2 | % |  | 7.6 | %
Technology, Advertising, Media, and Information ("TAMI") |  | 15.2 | % |  | 18.2 | %
Public Sector |  | 12.4 | % |  | 7.9 | %
Retail/Wholesale |  | 6.2 | % |  | 5.7 | %
Professional Services |  | 5.6 | % |  | 11.4 | %
Real Estate |  | 2.2 | % |  | — | %
Other |  | 2.1 | % |  | 4.9 | %
Health Services |  | — | % |  | 4.2 | %

(1)Source: Cushman and Wakefield Research Services
General Terms of Leases in the Manhattan Markets
Leases entered into for space in Manhattan typically contain terms that may not be contained in leases in other U.S. office markets. The initial term of leases entered into for space in Manhattan is generally seven to fifteen years. Tenants leasing space in excess of 10,000 square feet for an initial term of 10 years or longer often will negotiate an option to extend the term of the lease for one or two renewal periods, typically for a term of five years each. The base rent during the initial term often will provide for agreed-upon periodic increases over the term of the lease. Base rent for renewal terms is most often based upon the then fair market rental value of the premises as of the commencement date of the applicable renewal term (generally determined by binding arbitration in the event the landlord and the tenant are unable to mutually agree upon the fair market value), though base rent for a renewal period may be set at 95% of the then fair market rent. Very infrequently, leases may contain termination options whereby a tenant can terminate the lease obligation before the lease expiration date with payment of a penalty together with repayment of the unamortized portion of the landlord's transaction costs (e.g., brokerage commissions, free rent periods, tenant improvement allowances, etc.).
In addition to base rent, a tenant will generally also pay its pro rata share of increases in real estate taxes and operating expenses for the building over a base year, which is typically the year during which the term of the lease commences, based upon the tenant's proportionate occupancy of the building. In some smaller leases (generally less than 10,000 square feet), in lieu of paying additional rent based upon increases in building operating expenses, base rent will be increased each year during the lease term by a set percentage on a compounding basis (though the tenant will still pay its pro rata share of increases in real estate taxes over a base year).
Tenants typically receive a free rent period following commencement of the lease term, which in some cases may coincide with the tenant's construction period.
The landlord most often supplies electricity either on a sub-metered basis at the landlord's cost plus a fixed percentage or on a rent inclusion basis (i.e., a fixed fee is added to the base rent for electricity, which amount may increase based upon increases in electricity rates or increases in electrical usage by the tenant). Base building services, other than electricity, such as heat, air conditioning, freight elevator service during business hours and base building cleaning typically are provided at no additional cost, but are included in the building's operating expenses. The tenant will typically pay additional amounts only for services that exceed base building services or for services that are provided other than during normal business hours.
8

Table of Contents
In a typical lease for a new tenant renting in excess of 10,000 square feet, the landlord will deliver the premises with existing improvements demolished. In such instances, the landlord will typically provide a tenant improvement allowance, which is a fixed sum that the landlord makes available to the tenant to reimburse the tenant for all or a portion of the tenant's initial construction of its premises. Such sum typically is payable as work progresses, upon submission by the tenant of invoices for the cost of construction and lien waivers. However, in certain leases (most often for relatively small amounts of space), the landlord will construct the premises for the tenant at a cost to the landlord not to exceed an agreed upon amount with the tenant paying any amount in excess of the agreed upon amount. In addition, landlords may rent space to a tenant that is "pre-built" (i.e., space that was constructed by the landlord in advance of lease signing and is ready to for the tenant to move in with the tenant selecting paint and carpet colors).
Occupancy
The following table sets forth the weighted average occupancy rates at our office properties based on space leased for properties owned by us as of December 31, 2023:

|  | Leased Occupancy as of December 31,
Property |  | 2023 |  | 2022
Same-Store office properties - Manhattan (1) |  | 90.0% |  | 91.2%
Manhattan office properties |  | 89.4% |  | 90.7%
Suburban office properties |  | 77.1% |  | 79.3%
Unconsolidated joint venture office properties |  | 91.1% |  | 94.3%
Portfolio (2) |  | 89.2% |  | 90.3%

(1)All office properties located in Manhattan owned by us as of January 1, 2022 and still owned by us in the same manner as of December 31, 2023. Percent Occupied includes leases signed but not yet commenced.
(2)Excludes properties under development or redevelopment.
Rent Trajectory
We are constantly evaluating our schedule of future lease expirations to mitigate occupancy risk while maximizing net effective rents. We proactively manage future lease expirations based on our view of estimated current and future market conditions and asking rents. The following table sets forth our future lease expirations, excluding triple net leases, and management's estimates of market asking rents. Taking rents are typically lower than asking rents and may vary from building to building. There can be no assurances that our estimates of market rents are accurate or that market rents currently prevailing will not erode or outperform in the future.

|  | ANNUAL LEASE EXPIRATIONS - MANHATTAN OPERATING PROPERTIES
|  | Consolidated Properties |  | Joint Venture Properties
Year of Lease Expiration |  | Number of Expiring Leases (1) | Rentable Square Footage of Expiring Leases | Percentage of Total Sq. Ft. | Annualized Cash Rent of Expiring Leases |  | Annualized Cash Rent Per Square Foot of Expiring Leases $/psf (2) | Current Weighted Average Asking Rent $/psf (3) |  | Number of Expiring Leases (2) | Rentable Square Footage of Expiring Leases | Percentage of Total Sq. Ft. | Annualized Cash Rent of Expiring Leases |  | Annualized Cash Rent Per Square Foot of Expiring Leases $/psf (2) | Current Weighted Average Asking Rent $/psf (3)
2023 (4) |  | 16 |  | 177,309 |  | 2.30 | % | $10,016,868 |  | $56.49 |  | $59.01 |  |  | 6 |  | 114,048 |  | 0.80 | % | $11,892,355 |  |  | $104.27 |  | $83.77 |
1st Quarter 2024 |  | 9 |  | 40,596 |  | 0.50 | % | $3,623,916 |  | $89.27 |  | $72.65 |  |  | 8 |  | 122,938 |  | 0.90 | % | $13,392,794 |  |  | $108.94 |  | $105.28 |
2nd Quarter 2024 |  | 19 |  | 55,415 |  | 0.70 | % | 3,451,449 |  |  | 62.28 |  | 58.02 |  |  | 7 |  | 56,635 |  | 0.40 | % | 4,804,151 |  |  | 84.83 |  | 71.55 |
3rd Quarter 2024 |  | 11 |  | 106,551 |  | 1.40 | % | 4,049,418 |  |  | 38.00 |  | 36.79 |  |  | 5 |  | 604,236 |  | 4.40 | % | 69,411,649 |  |  | 114.88 |  | 81.77 |
4th Quarter 2024 |  | 20 |  | 288,851 |  | 3.90 | % | 17,558,046 |  |  | 60.79 |  | 57.84 |  |  | 8 |  | 48,235 |  | 0.30 | % | 5,240,414 |  |  | 108.64 |  | 83.63 |
Total 2024 |  | 59 |  | 491,413 |  | 6.50 | % | $28,682,829 |  | $58.37 |  | $54.52 |  |  | 28 |  | 832,044 |  | 6.00 | % | $92,849,008 |  |  | $111.59 |  | $84.66 |
2025 |  | 71 |  | 680,624 |  | 9.00 | % | $55,301,323 |  | $81.25 | $67.23 |  | 26 |  | 373,433 |  | 2.70 | % | $36,125,921 |  |  | $96.74 |  | $83.31 |
2026 |  | 54 |  | 776,991 |  | 10.20 | % | 53,956,330 |  |  | 69.44 |  | 65.44 |  |  | 42 |  | 802,152 |  | 5.80 | % | 89,411,068 |  |  | 111.46 |  | 100.46 |
2027 |  | 55 |  | 650,165 |  | 8.60 | % | 52,559,470 |  |  | 80.84 |  | 64.19 |  |  | 29 |  | 352,724 |  | 2.50 | % | 44,741,842 |  |  | 126.85 |  | 113.71 |
2028 |  | 53 |  | 698,668 |  | 9.20 | % | 52,371,028 |  |  | 74.96 |  | 67.99 |  |  | 30 |  | 305,851 |  | 2.20 | % | 35,200,396 |  |  | 115.09 |  | 113.74 |
2029 |  | 33 |  | 591,177 |  | 7.80 | % | 38,909,520 |  |  | 65.82 |  | 60.79 |  |  | 17 |  | 893,912 |  | 6.40 | % | 64,603,106 |  |  | 72.27 |  | 75.99 |
2030 |  | 22 |  | 696,540 |  | 9.20 | % | 49,396,547 |  |  | 70.92 |  | 66.02 |  |  | 21 |  | 505,445 |  | 3.60 | % | 51,835,737 |  |  | 102.55 |  | 90.09 |
2031 |  | 18 |  | 321,405 |  | 4.20 | % | 22,841,818 |  |  | 71.07 |  | 67.96 |  |  | 27 |  | 2,912,088 |  | 21.00 | % | 219,024,122 |  |  | 75.21 |  | 76.64 |
2032 |  | 16 |  | 669,608 |  | 8.80 | % | 40,664,070 |  |  | 60.73 |  | 54.14 |  |  | 15 |  | 1,075,978 |  | 7.80 | % | 95,341,186 |  |  | 88.61 |  | 91.77 |
Thereafter |  | 60 |  | 1,835,137 |  | 24.20 | % | 112,016,314 |  |  | 61.04 |  | 54.67 |  |  | 75 |  | 5,714,468 |  | 41.20 | % | 556,177,116 |  |  | 97.33 |  | 102.86 |
|  | 457 |  | 7,589,037 |  | 100.00 | % | $516,716,117 |  | $68.09 |  | $61.07 |  |  | 316 |  | 13,882,143 |  | 100.00 | % | $1,297,201,857 |  |  | $93.44 |  | $92.91 |

NOTE: Data excludes space currently occupied by SL Green's corporate offices
(1)Tenants may have multiple leases.
(2)Represents in place annualized rent allocated by year of expiration.
9

Table of Contents
(3)Management's estimate of current average asking rents for currently occupied space as of December 31, 2023. Taking rents are typically lower than asking rents and may vary from property to property.
(4)Includes month to month holdover tenants that expired prior to December 31, 2023.
Industry Segments
The Company is a REIT that is engaged in the ownership, management, operation, acquisition, development, redevelopment and repositioning of commercial properties, principally office properties, located in the New York metropolitan area, principally Manhattan, and has three reportable segments: real estate, debt and preferred equity investments, and SUMMIT. Our industry segments are discussed in Note 21, "Segment Information," in the accompanying consolidated financial statements.
As of December 31, 2023, our real estate portfolio was principally located in one geographical market, Manhattan, a borough of New York City. The Company's primary sources of real estate revenue are tenant rents, escalations and reimbursement revenue. Real estate property operating expenses consist primarily of cleaning, security, maintenance, utility costs, real estate taxes and, at certain properties, ground rent expense. As of December 31, 2023, one tenant in our office portfolio, Paramount Global (formerly ViacomCBS Inc.), contributed 5.9% of our share of annualized cash rent. No other tenant contributed more than 5.0% of our share of annualized cash rent. No property contributed in excess of 10.0% of our consolidated total revenue for 2023.
As of December 31, 2023, we held debt and preferred equity investments with a book value of $346.7 million, excluding debt and preferred equity investments and other financing receivables totaling $7.9 million that are included in balance sheet line items other than the Debt and preferred equity investments line item. As of December 31, 2023, all of the assets underlying our debt and preferred equity investments were located in New York City. The primary sources of debt and preferred equity revenue are interest and fee income.
As of December 31, 2023, SUMMIT operates one location at One Vanderbilt Avenue in midtown Manhattan with the primary source of revenue generated from ticket sales.
Human Capital
Our employees are our most important asset. We are focused on fostering an inclusive workforce that attracts and retains highly talented and diverse individuals. We are dedicated to creating a diverse workplace where employees feel valued and accepted regardless of race, color, religion, national origin, gender, sexual orientation, age, disability, or veteran status. We have a dual-track performance management program, which includes both ongoing goal setting and annual performance reviews for all employees. Communication, teamwork, and collaboration are the fundamental attributes that are the foundation of our company culture. We promote the professional development of our employees by offering opportunities to participate in trainings and continuing education programs. We also offer a leading benefits package that includes extensive medical coverage, mental health and wellness services, paternal benefits, and financial resources. We earned our first certification as a Great Place to Work in 2019 and in 2023, 85% of our employees have said the Company is a great place to work as compared to 57% at a typical U.S. based company.
Our compensation program is designed to incentivize employees by offering competitive compensation comprised of fixed and variable pay including base salaries and cash bonuses. Many of our employees also receive equity awards that are subject to vesting over a multi-year period based on continued service. We believe these equity awards serve as an additional retention tool for our employees and align our employees with our shareholders. By cultivating a work culture that prioritizes our people through training, diversity, education, and volunteerism, we have been able to retain a long-tenured staff with 47% of current employees having a tenure of five years or more and an executive management team that has an average tenure of 20.9 years.
As of December 31, 2023, we employed 1,188 employees, 308 of whom were employed in our corporate offices. There are currently five collective bargaining agreements which cover the union workforce that services substantially all of our properties.
Climate Change
Our assessment of climate-related issues includes physical risks, transitions risks, and associated opportunities. We believe our sustained focus on Environmental, Social and Governance ("ESG") issues has led to effective risk-management practices that influence strategic decisions.
The Company takes a proactive approach to climate-related risk management throughout the organization. ESG considerations are embedded into our governance structure and management responsibilities, driving our climate-related risk assessment processes and enabling comprehensive risk mitigation responses to be implemented in all relevant business segments across short-term (0-3 years), medium-term (3-15 years), and long-term (15-27 years) time horizons.
10

Table of Contents
With our roots in New York City, we are at the center of one of the world's most ambitious climate legislative environments. Through the Climate Leadership and Community Protection Act signed into law in 2019, New York State mandated the adoption of a net-zero carbon economy statewide by 2050, with a zero-carbon electricity grid by 2040. New York City enacted Local Law 97 (LL97) in 2019 under the Climate Mobilization Act, setting carbon caps for large buildings starting in 2024 as part of a broader commitment to reducing greenhouse gas emissions by 40% by 2030, and by 80% by 2050. We do not anticipate any material financial impact on our portfolio in the first compliance period of 2024 to 2029.
The Company has demonstrated a commitment to transparency on climate issues via annual public reporting informed by widely-adopted frameworks, including Global Reporting Initiative ("GRI"), Global Real Estate Benchmark ("GRESB"), Sustainability Accounting Standards Board ("SASB"), and the CDP (formerly the Carbon Disclosure Project). In 2021, the Company released its first Task Force on Climate-related Financial Disclosures ("TCFD") report structured in accordance with the 11 TCFD recommendations covering its climate governance, strategy, management, and metrics. In 2023, the Company released its second TCFD report expanding on our list of physical and transition risks and opportunities and to present its progress on its TCFD disclosure. This report, along with the Company's current ESG Report, is available under "Reports & Resources" in the "Sustainability" section on our website. The Company has committed to near-term Scope 1 and Scope 2 science-based emissions reduction targets with the SBTi, which were approved in early 2023. Our goal is to reduce emissions for our operationally controlled portfolio to align it with the 1.5 degree Celsius climate scenario.
Highlights from 2023
Our significant achievements from 2023 included:
Leasing
•Signed 160 Manhattan office leases covering approximately 1.8 million square feet.
•Increased same-store Manhattan office occupancy sequentially in the third and fourth quarters.
•Signed an early lease renewal of 141,589 square feet and expansion by an additional 128,316 square feet with a premier financial services tenant at 280 Park Avenue.
•Signed an early lease renewal with CBS Broadcasting, Inc. for 184,367 square feet at 555 West 57th Street.
•Signed an early lease renewal of 41,851 square feet and expansion by 49,717 square feet with one of the world's largest sovereign wealth funds at 280 Park Avenue.
•Signed a new lease with Stonepeak Partners L.P. for 76,716 square feet at 245 Park Avenue.
•Signed a new lease with EQT Partners Inc. for 76,204 square feet at 245 Park Avenue.
Acquisitions
•Following a UCC foreclosure, the Company converted its previous mezzanine debt investments in the fee interest at 625 Madison Avenue to a 90.43% ownership interest. The fee interest is subject to a $223.0 million third-party mortgage, which matures in December 2026 and bears interest at a fixed rate of 6.05%.
Dispositions
•Together with our joint venture partner, the Company entered into an agreement to sell the fee ownership interest in 625 Madison Avenue for a gross sales price of $634.6 million. In connection with the sale, the Company, together with its joint venture partner, will originate a $235.5 million preferred equity investment in the property. The transaction is expected to close in the first quarter of 2024.
•Together with our joint venture partners, closed on the sale of the equity interests in the condominium units at 21 East 66th Street for total consideration of $40.6 million.
•Closed on the sale of a 49.9% joint venture interest in 245 Park Avenue for a gross asset valuation of $2.0 billion. The Company retained a 50.1% interest in the property.
•Together with our joint venture partner, closed on the sale of the retail condominiums at 121 Greene Street for a gross sales price of $14.0 million.
Finance
•Closed on a modification of the mortgage at 185 Broadway to extend the maturity to November 2026, as fully extended. The modification also converted the previous floating rate of 2.85% over Term SOFR to a fixed rate of 6.65% per annum through November 2025 and 2.55% over Term SOFR thereafter. The Company made a $20.0 million principal payment at closing resulting in an outstanding loan amount of $190.1 million as of December 31, 2023.
11

Table of Contents
•Together with our joint venture partner, closed on a modification of the mortgage at 719 Seventh Avenue to extend the maturity date to December 2024 with no change to the interest rate of 1.31% over Term SOFR.
•Together with our joint venture partner, closed on a modification of the mortgage at 115 Spring Street to extend the maturity date to March 2025. The modification also converted the floating rate of 3.40% over Term SOFR to a fixed rate of 5.50% for the term of the extension.
•Together with our joint venture partners, closed on a modification of the construction loan at One Madison Avenue, allowing the partnership to utilize the final tranche of the facility for an expanded range of uses, including additional amenities funded by construction cost savings and for hedging activities in contemplation of a permanent financing.
•Together with our joint venture partner, closed on the refinancing of 919 Third Avenue. The new $500.0 million mortgage replaces the previous $500.0 million mortgage, matures in April 2028, as fully extended, and bears interest at a floating rate of 2.50% over Term SOFR, which the partnership swapped to a fixed rate of 6.11%.
Debt and Preferred Equity Investments
•Closed on a $20.0 million upsize and three-year extension of a $39.1 million debt and preferred equity investment that was scheduled to mature in October 2023.
•Increased debt and preferred equity investments by $80.3 million, inclusive of advances under future funding obligations, discount and fee amortization, and paid-in-kind interest, net of premium amortization, and transferred investments with a carrying value of $349.9 million to equity ownership.
Construction in Progress
•The 1.4 million square foot tower at One Madison Avenue secured its temporary certificate of occupancy in September 2023, marking completion of the development three months ahead of schedule and significantly under budget. The milestone triggered cash payments to the Company totaling $577.4 million, representing the final equity payment from its joint venture partners. The cash was used to repay unsecured corporate debt.
•A temporary certificate of occupancy was issued by the New York City Buildings Department for the base building and the dormitory units at 15 Beekman. These units were turned over to Pace University, which has leased the property for a term of 30 years.
12

Table of Contents
ITEM 1A. RISK FACTORS
Declines in the demand for office space in the New York metropolitan area, and in particular midtown Manhattan, could adversely affect the value of our real estate portfolio and our results of operations and, consequently, our ability to service current debt and to pay dividends and distributions to security holders.
A significant majority of our property holdings are comprised of commercial office properties located in midtown Manhattan. Our property holdings also include some retail properties. As a result of the concentration of our holdings, our business is dependent on the condition of the New York metropolitan area economy in general and the market for office space in midtown Manhattan in particular. Continued weakness and uncertainty in the New York metropolitan area economy could materially reduce the value of our real estate portfolio and our rental revenues, and thus adversely affect our cash flow and our ability to service our debt obligations and to pay dividends and distributions to security holders.
The COVID-19 pandemic caused severe disruptions with wide ranging impacts to virtually every segment of society and the global economy. Office companies in particular have been affected by the subsequent increased acceptance of flexible or hybrid work schedules, allowing employees to work remotely and collaborate through video or teleconferencing instead of in-office attendance. The continuation or expansion of remote work policies and flexible work arrangements may cause office tenants to reassess their long-term physical needs, which would have an adverse effect on our business, results of operations, liquidity, cash flows, prospects, and our ability to achieve forward-looking targets and expectations.
We may be unable to renew leases or relet space as leases expire.
If tenants decide not to renew their leases upon expiration, we may not be able to relet the space. Even if tenants do renew or we can relet the space, the terms of a renewal or new lease, taking into account among other things, the cost of improvements to the property and leasing commissions, may be less favorable than the terms in the expired leases. As of December 31, 2023, approximately 44.1% of the rentable square feet at our consolidated properties and approximately 20.6% of the rentable square feet at our unconsolidated joint venture properties are scheduled to expire by December 31, 2028. As of December 31, 2023, these leases had annualized escalated rent totaling $265.5 million and $384.0 million, respectively. In addition, changes in space utilization by tenants may cause us to incur substantial costs in renovating or redesigning the internal configuration of the relevant property in order to renew or relet space. If we are unable to promptly renew the leases or relet the space at similar rates or if we incur substantial costs in renewing or reletting the space, our cash flow and ability to service our debt obligations and pay dividends and distributions to security holders could be adversely affected.
We face significant competition for tenants.
The leasing of real estate is highly competitive. The principal competitive factors are rent, location, lease term, lease concessions, services provided and the nature and condition of the property to be leased. We directly compete with all owners, developers and operators of similar space in the areas in which our properties are located.
Our commercial office properties are concentrated in highly developed areas of the New York metropolitan area. Manhattan is the largest office market in the United States. The number of competitive office properties in the New York metropolitan area, which may be newer or better located than our properties, could have a material adverse effect on our ability to lease office space at our properties, and on the effective rents we are able to charge.
The expiration of long term leases or operating sublease interests where we do not own a fee interest in the land could adversely affect our results of operations.
Our interests in certain properties are entirely or partially comprised of either long-term leasehold or operating sublease interests in the land and the improvements, rather than by ownership of fee interest in the land. As of December 31, 2023, the expiration dates of these long-term leases range from 2043 to 2119, including the effect of our unilateral extension rights at each of these properties. Pursuant to the leasehold arrangements, we, as tenant under the long-term leasehold or the operating sublease, perform the functions traditionally performed by landlords with respect to our subtenants. We are responsible for not only collecting rent from our subtenants, but also maintaining the property and paying expenses relating to the property. Annualized cash rents, including our share of joint venture annualized cash rents, from properties held through long-term leases or operating sublease interests as of December 31, 2023 totaled $249.7 million, or 18.7%, of our share of total Portfolio annualized cash rent. Unless we purchase a fee interest in the underlying land or extend the terms of these leases prior to expiration, we will no longer operate these properties upon expiration of the leases, which could adversely affect our financial condition and results of operations. Rent payments under leasehold or operating sublease interests are adjusted, within the parameters of the contractual arrangements, at certain intervals. Rent adjustments may result in higher rents that could adversely affect our financial condition and results of operation.
13

Table of Contents
We rely on five large properties for a significant portion of our revenue.
Five of our properties, One Vanderbilt Avenue, 11 Madison Avenue, 420 Lexington Avenue, 1515 Broadway and 1185 Avenue of the Americas accounted for 38.9% of our Portfolio annualized cash rent, which includes our share of joint venture annualized cash rent, as of December 31, 2023.
Our revenue and cash available to service debt obligations and for distribution to our stockholders would be materially adversely affected if any of these properties were materially damaged or destroyed. Additionally, our revenue and cash available to service debt obligations and for distribution to our stockholders would be materially adversely affected if tenants at these properties fail to timely make rental payments due to adverse financial conditions or otherwise, default under their leases or file for bankruptcy or become insolvent.
Our results of operations rely on major tenants and insolvency or bankruptcy of these or other tenants could adversely affect our results of operations.
Giving effect to leases in effect as of December 31, 2023 for consolidated properties and unconsolidated joint venture properties, as of that date, our five largest tenants, based on annualized cash rent, accounted for 15.4% of our share of Portfolio annualized cash rent, with one tenant, Paramount Global (formerly ViacomCBS Inc.), accounting for 5.9% of our share of Portfolio annualized cash rent. Our business and results of operations would be adversely affected if any of our major tenants became insolvent, declared bankruptcy, or otherwise refused to pay rent in a timely fashion or at all. In addition, if business conditions in the industries in which our tenants are concentrated deteriorate, or economic volatility has a disproportionate impact on our tenants, we may experience increases in past due accounts, defaults, lower occupancy and reduced effective rents across tenants in such industries, which could in turn have an adverse effect on our business and results of operations.
Construction is in progress at our development projects.
The Company's development projects are subject to internal and external factors which may affect construction progress. Unforeseen matters could delay completion, result in increased costs or otherwise have a material effect on our results of operations. In addition, the extended time frame to complete these projects could cause them to be subject to shifts and trends in the real estate market which may not be consistent with our current business plans for the properties.
We are subject to risks that affect the retail environment.
While only 4.7% of our Portfolio annualized cash rent was generated by retail properties as of December 31, 2023, principally in Manhattan, we are subject to risks that affect the retail environment generally, including the level of consumer spending and preferences, consumer confidence, electronic retail competition and levels of tourism in Manhattan. These factors could adversely affect the financial condition of our retail tenants and the willingness of retailers to lease space in our retail properties, which could in turn have an adverse effect on our business and results of operations.
We are subject to the risk of adverse changes in economic and geopolitical conditions in general and the commercial office markets in particular.
Our business has been and may continue to be affected by the ongoing volatility in the U.S. financial and credit markets and higher interest rate environments and other market, economic, or political challenges experienced by the U.S. economy or the real estate industry as a whole, including changes in law and policy and uncertainty in connection with any such changes. Periods of economic weakness or volatility result in reduced access to credit and/or wider credit spreads. Economic or political uncertainty, including concern about growth and the stability of the markets generally and changes in interest rates, have led lenders and institutional investors to reduce and, in some cases, cease to provide funding to borrowers, which adversely affects our liquidity and financial condition, and the liquidity and financial condition of our tenants. Specifically, our business, like other real estate businesses, has been and may continue to be affected by the following conditions:
•significant job losses or declining rates of job creation, which decrease demand for office space, causing market rental rates and property values to be negatively impacted;
•the ability to borrow on terms and conditions that we find acceptable, which reduces our ability to pursue acquisition and development opportunities and refinance existing debt, reducing our returns from both our existing operations and our acquisition and development activities and increasing our future interest expense; and
•reduced values of our properties, which limits our ability to dispose of assets at acceptable prices and to obtain debt financing secured by our properties.
14

Table of Contents
Leasing office space to smaller and growth-oriented businesses could adversely affect our cash flow and results of operations.
Some of the tenants in our properties are smaller, growth-oriented businesses that may not have the financial strength of larger corporate tenants. Smaller companies generally experience a higher rate of failure than larger businesses. Growth-oriented firms may also seek other office space as they develop. Leasing office space to these companies creates a higher risk of tenant defaults, turnover and bankruptcies, which could adversely affect our cash flow and results of operations.
We may suffer adverse consequences if our revenues decline since our operating costs do not decline in proportion to our revenue.
We earn a significant portion of our income from renting our properties. Our operating costs, however, do not fluctuate in proportion to changes in our rental revenue. If revenues decline more than expenses, we may be forced to borrow to cover our costs, we may incur losses or we may not have cash available to service our debt obligations and to pay dividends and distributions to security holders.
Competition for acquisitions may reduce the number of acquisition opportunities available to us and increase the costs of those acquisitions.
We may acquire properties when we are presented with attractive opportunities. We may face competition for acquisition opportunities from other investors, particularly those investors who are willing to incur more leverage, and this competition may adversely affect us by subjecting us to the following risks:
•an inability to acquire a desired property because of competition from other well-capitalized real estate investors, including publicly traded and privately held REITs, private real estate funds, domestic and foreign financial institutions, life insurance companies, sovereign wealth funds, pension trusts, partnerships and individual investors; and
•an increase in the purchase price for such acquisition property.
If we are unable to successfully acquire additional properties, our ability to grow our business could be adversely affected.
We face risks associated with property acquisitions.
Our acquisition activities may not be successful if we are unable to meet required closing conditions or unable to finance acquisitions and developments of properties on favorable terms or at all. Additionally, we have less visibility into the future performance of acquired properties than properties that we have owned for a period of time, and therefore, recently acquired properties may not be as profitable as our existing portfolio.
Further, we may acquire properties subject to both known and unknown liabilities and without any recourse, or with only limited recourse to the seller. As a result, if a liability were asserted against us arising from our ownership of those properties, we might have to pay substantial sums to settle it, which could adversely affect our cash flow. Unknown liabilities with respect to properties acquired might include:
•claims by tenants, vendors or other persons arising from dealing with the former owners of the properties;
•liabilities incurred in the ordinary course of business;
•claims for indemnification by general partners, directors, officers and others indemnified by the former owners of the properties; and
•liabilities for clean-up of undisclosed environmental contamination.
Limitations on our ability to sell or reduce the indebtedness on specific properties could adversely affect the value of our common stock.
In connection with past and future acquisitions of interests in properties, we have or may agree to restrictions on our ability to sell or refinance the acquired properties for certain periods. These limitations could result in us holding properties which we would otherwise sell, or prevent us from paying down or refinancing existing indebtedness, any of which may have adverse consequences on our business and result in a material adverse effect on our financial condition and results of operations.
15

Table of Contents
Potential losses may not be covered by insurance.
We maintain “all-risk” property and rental value coverage (including coverage regarding the perils of flood, earthquake and terrorism, excluding nuclear, biological, chemical, and radiological terrorism ("NBCR")) within two property insurance programs and liability insurance. Separate property and liability coverage may be purchased on a stand-alone basis for certain assets, such as development projects. Additionally, one of our captive insurance companies, Belmont Insurance Company, or Belmont, provides coverage for NBCR terrorist acts above a specified trigger. Belmont's retention is reinsured by our other captive insurance company, Ticonderoga Insurance Company ("Ticonderoga"). If Belmont or Ticonderoga are required to pay a claim under our insurance policies, we would ultimately record the loss to the extent of required payments. There is no assurance that in the future we will be able to procure coverage at a reasonable cost. Further, if we experience losses that are uninsured or that exceed policy limits, we could lose the capital invested in the damaged properties as well as the anticipated future cash flows from those properties. Additionally, our debt instruments contain customary covenants requiring us to maintain insurance and we could default under our debt instruments if the cost and/or availability of certain types of insurance make it impractical or impossible to comply with such covenants relating to insurance. Belmont and Ticonderoga provide coverage solely on properties owned, in whole or in part, by the Company or its affiliates.
Furthermore, with respect to certain of our properties, including certain properties held by joint ventures or subject to triple net leases, insurance coverage is obtained by a third-party and we do not control the coverage. While we may have agreements with such third parties to maintain adequate coverage and we monitor these policies, such coverage ultimately may not be maintained or adequately cover our risk of loss.
The occurrence of a terrorist attack may adversely affect the value of our properties and our ability to generate cash flow.
Our operations are primarily concentrated in the New York metropolitan area. In the aftermath of a terrorist attack or other acts of terrorism or war, tenants in the New York metropolitan area may choose to relocate their business to less populated, lower-profile areas of the United States that those tenants believe are not as likely to be targets of future terrorist activity. In addition, economic activity could decline as a result of terrorist attacks or other acts of terrorism or war, or the perceived threat of such acts. Each of these impacts could in turn trigger a decrease in the demand for space in the New York metropolitan area, which could increase vacancies in our properties and force us to lease our properties on less favorable terms. While under the Terrorism Risk Insurance Program Reauthorization Act of 2019, insurers must make terrorism insurance available under their property and casualty insurance policies, this legislation does not regulate the pricing of such insurance. The absence of affordable terrorism insurance coverage may adversely affect the general real estate lending market, lending volume and the market's overall liquidity and, in the event of an uninsured loss, we could lose all or a portion of our assets. Furthermore, we may also experience increased costs in relation to security equipment and personnel. As a result, the value of our properties and our results of operations could materially decline.
We face possible risks associated with the natural disasters and the effects of climate change.
We are committed to enhancing the resilience of our properties and we have established comprehensive procedures to effectively manage and respond to climate-related risks. Our procedures encompass a range of potential impacts, including those stemming from natural disasters such as storms, heatwaves, hurricanes, flooding, and other severe weather. We recognize that the intensity of weather events and the rise in sea levels have the potential to impact our properties, operations, and overall business. Since Hurricane Sandy in 2012, New York City has experienced several severe storms that have had significant impacts on the area, and we are actively tracking the risks these storms pose to the city’s real estate market and physical landscape. Over time, and in an extreme scenario, these conditions could potentially result in declining demand for office space, specifically in coastal areas of New York City, or potentially an inability to fully operate buildings. Climate change may also have indirect effects on our business by increasing the cost of property insurance on terms we find acceptable or causing a lack of availability of sufficient insurance. There could also be increases in the cost of energy and other natural resources at our properties as we seek to repair and protect our properties against climate risks. We proactively review every building through both a financial and environmental lens to ensure that building systems and operations align with our climate-related risk assessments. Any of these direct or indirect effects of climate change may have a material adverse effect on our properties, operations or business.
16

Table of Contents
We may incur significant costs to comply with climate change initiatives, and in particular those implemented in New York City.
Numerous states and municipalities have adopted laws and policies on climate change and emission reduction targets. In particular, through the Climate Leadership and Community Protection Act signed into law in 2019, New York State mandated the adoption of a net-zero carbon economy statewide by 2050, with a zero-carbon electricity grid by 2040. New York City enacted Local Law 97 (LL97) in 2019 under the Climate Mobilization Act, setting carbon caps for large buildings starting in 2024 as part of a broader commitment to reducing greenhouse gas emissions by 40% by 2030, and by 80% by 2050. As our portfolio is principally located in Manhattan, our business is subject to transition risks related to these climate change policies. Costs of compliance or penalties in later compliance periods may be significant. If we are unable to meet the required emissions reductions, we may be subject to material fines that will continue to be assessed each year we fail to comply. Based on current emissions data available from 2022, our portfolio is expected to be compliant through 2024, with no material financial impact to our properties. Additionally, even if we can achieve compliance under LL97 in a given year, it is not a certainty that we will remain in compliance in subsequent years.
RISKS RELATED TO OUR LIQUIDITY AND CAPITAL RESOURCES
Debt financing, financial covenants, degree of leverage, and increases in interest rates could adversely affect our economic performance.
Scheduled debt payments could adversely affect our results of operations.
Cash flow could be insufficient to meet the payments of principal and interest required under our current mortgages, our 2021 credit facility, our senior unsecured notes, our debentures and indebtedness outstanding at our joint venture properties. The total principal amount of our outstanding consolidated indebtedness was $3.5 billion as of December 31, 2023, consisting of $1.3 billion in unsecured bank term loans, $0.1 billion under our senior unsecured notes, $0.1 billion of junior subordinated deferrable interest debentures, $1.5 billion of non-recourse mortgages and loans payable on certain of our properties and debt and preferred equity investments and $560.0 million drawn under our revolving credit facility. In addition, we could increase the amount of our outstanding consolidated indebtedness in the future, in part by borrowing under the revolving credit facility. As of December 31, 2023, the total principal amount of indebtedness outstanding at the joint venture properties was $14.9 billion, of which our proportionate share was $7.4 billion.
If we are unable to make payments under our 2021 credit facility, all amounts due and owing at such time shall accrue interest at a per annum rate equal to 2% higher than the rate applicable immediately prior to the default. If we are unable to make payments under our senior unsecured notes, the principal and unpaid interest will become immediately payable. If a property is mortgaged to secure payment of indebtedness and we are unable to meet mortgage payments, the mortgagee could foreclose on the property, resulting in loss of income and asset value. Foreclosure on mortgaged properties or an inability to make payments under our 2021 credit facility or our senior unsecured notes could trigger defaults under the terms of our other financings, making such financings at risk of being declared immediately payable, and would have a negative impact on our financial condition and results of operations.
We may not be able to refinance existing indebtedness, which may require substantial principal payments at maturity. $382.8 million of consolidated mortgage debt and $1.6 billion of unconsolidated joint venture debt is scheduled to mature in 2024 after giving effect to our as-of-right extension options and repayments and refinancing of consolidated and joint venture debt between December 31, 2023 and February 22, 2024 as discussed in the "Financial Statements and Supplementary Data" section. At the present time, we intend to repay, refinance, or exercise extension options on the debt associated with our properties on or prior to their respective maturity dates. At the time of refinancing, prevailing interest rates or other factors, such as the possible reluctance of lenders to make commercial real estate loans, may result in higher interest rates. Increased interest expense on the extended or refinanced debt would adversely affect cash flow and our ability to service debt obligations and pay dividends and distributions to security holders. If any principal payments due at maturity cannot be repaid, refinanced or extended, our cash flow will not be sufficient to repay maturing or accelerated debt.
Financial covenants could adversely affect our ability to conduct our business.
The mortgages and mezzanine loans on our properties generally contain customary negative covenants that limit our ability to further mortgage the properties, to enter into material leases without lender consent or materially modify existing leases, among other things. In addition, our 2021 credit facility and senior unsecured notes contain restrictions and requirements on our method of operations. Our 2021 credit facility and our unsecured notes also require us to maintain designated ratios, including but not limited to, total debt-to-assets, debt service coverage and unencumbered assets-to-unsecured debt. These restrictions could adversely affect operations (including reducing our flexibility and our ability to incur additional debt), our ability to pay debt obligations and our ability to pay dividends and distributions to security holders.
17

Table of Contents
High interest rates could adversely affect our cash flow.
Advances under our 2021 credit facility and certain property-level mortgage debt bear interest at a variable rate. After giving effect to derivatives, our consolidated variable rate borrowings totaled $0.3 billion as of December 31, 2023. In addition, we could increase the amount of our outstanding variable rate debt in the future, in part by borrowing additional amounts under our 2021 credit facility. Borrowings under our revolving credit facility and two term loans bore interest at the adjusted term Secured Overnight Financing Rate ("SOFR") plus 10 basis points, and the applicable spreads of 140 basis points, 160 basis points, and 165 basis points, respectively, as of December 31, 2023. As of December 31, 2023, borrowings under our term loans and junior subordinated deferrable interest debentures totaled $1.3 billion and $100.0 million, respectively. We may incur indebtedness in the future that also bears interest at a variable rate or may be required to refinance our debt at higher rates. If we were to incur variable rate indebtedness in the future, we may seek to enter into derivative instruments to mitigate the effect of such variable rate debt. However, such derivative instruments may not be available on favorable terms or at all. As of December 31, 2023, a hypothetical 100 basis point increase in interest rates across each of our variable interest rate instruments, including our variable rate debt and preferred equity investments which mitigate our exposure to interest rate changes, would increase our net annual interest costs by $1.0 million and would increase our share of joint venture annual interest costs by $12.2 million. Our joint ventures may also incur variable rate debt and face similar risks. Accordingly, increases in interest rates could adversely affect our results of operations and financial conditions and our ability to continue to pay dividends and distributions to security holders.
In addition, borrowings under our existing term loan and revolving credit facilities bear interest at a rate based on the term SOFR, which is a relatively new reference rate that replaced U.S. dollar London Interbank Offered Rate ("LIBOR"). As a result of SOFR’s limited performance history, the future performance of SOFR cannot be reliably predicted. The level of SOFR during the term of our existing term loan and revolving credit facilities may bear little or no relation to the historical level of SOFR. The future performance of SOFR is impossible to reliably predict, and, therefore, no future performance under our existing term loan and revolving credit facilities as it relates to SOFR may be inferred from historical performance. Since the initial publication of SOFR, daily changes in SOFR have, on occasion, been more volatile than daily changes in comparable benchmark or market rates, and SOFR over the term of our existing term loan and revolving credit facilities may bear little or no relation to the historical actual or historical indicative data. Changes in the levels of SOFR will affect the amount of interest we pay on our existing credit facilities. Additionally, there can be no assurance that SOFR will gain long-term market acceptance. Market participants may not consider SOFR to be a suitable substitute or successor for all of the purposes for which U.S. dollar LIBOR historically has been used (including, without limitation, as a representation of the unsecured short-term funding costs of banks), which may, in turn, lessen market acceptance of SOFR and cause SOFR to be modified or discontinued. These consequences could adversely affect our financial results or the amount of interest we pay on our existing credit facilities.
Our hedging strategies may not effectively limit exposure against interest rate changes, which may adversely affect results of operations.
The interest rate hedge instruments we use to manage some of our exposure to interest rate volatility involve risk and counterparties may fail to perform under these arrangements. In addition, these arrangements may not be effective in reducing our exposure to interest rate changes. When existing interest rate hedges terminate, we may incur increased costs in putting in place further interest rate hedges. Failure to hedge effectively against interest rate changes may adversely affect our results of operations.
Increases in our leverage could adversely affect our stock price.
Our organizational documents do not contain any limitation on the amount of indebtedness we may incur. We consider many factors when making decisions regarding the incurrence of indebtedness, such as the purchase price of properties to be acquired with debt financing, the estimated market value of our properties and the ability of particular properties and our business as a whole to generate cash flow to cover expected debt service. Any changes that increase our leverage could be viewed negatively by investors and could have a material effect on our financial condition, results of operations, cash flows, the trading price of our securities and our ability to pay dividends and distributions to security holders.
18

Table of Contents
Debt and preferred equity investments could cause us to incur expenses, which could adversely affect our results of operations.
We held first mortgages, mezzanine loans, junior participations and preferred equity interests with an aggregate net book value of $346.7 million as of December 31, 2023. Some of these instruments may have some recourse to their sponsors, while others are limited to the collateral securing the loan. In the event of a default under these obligations, we may take possession of the collateral securing these interests. Borrowers may contest enforcement of foreclosure or other remedies, seek bankruptcy protection against such enforcement and/or bring claims for lender liability in response to actions to enforce their obligations to us. Declines in the value of the property may prevent us from realizing an amount equal to our investment upon foreclosure or realization even if we make substantial improvements or repairs to the underlying real estate in order to maximize such property's investment potential. In addition, we may invest in mortgage-backed securities and other marketable securities.
Our debt and preferred equity investments are carried at the net amounts expected to be collected. We maintain and regularly evaluate the need for reserves to protect against potential future credit losses. Our reserves reflect management's judgment of the probability and severity of losses and the value of the underlying collateral. We cannot be certain that our judgment will prove to be correct and that our reserves will be adequate over time to protect against future credit losses because of unanticipated adverse changes in the economy or events adversely affecting specific properties, assets, tenants, borrowers, industries in which our tenants and borrowers operate or markets in which our tenants and borrowers or their properties are located. The ultimate resolutions may differ from our expectation, and we could suffer losses which would have a material adverse effect on our financial performance, the trading price of our securities and our ability to pay dividends and distributions to security holders.
Joint investments could be adversely affected by our lack of sole decision-making authority and reliance upon a co-venturer's financial condition.
We co-invest with third parties through partnerships, joint ventures, co-tenancies or other structures, and by acquiring non-controlling interests in, or sharing responsibility for managing the affairs of, a property, partnership, joint venture, co-tenancy or other entity. Therefore, we may not be in a position to exercise sole decision-making authority regarding such property, partnership, joint venture or other entity. Investments in partnerships, joint ventures, or other entities may involve risks not present were a third party not involved, including the possibility that our partners, co-tenants or co-venturers might file for bankruptcy protection or otherwise fail to fund their share of required capital contributions. Additionally, our partners or co-venturers might at any time have economic or other business interests or goals which are competitive or inconsistent with our business interests or goals. These investments may also have the potential risk of impasses on decisions such as a sale, because neither we, nor the partner, co-tenant or co-venturer would have full control over the partnership or joint venture. In addition, we may in specific circumstances be liable for the actions of our third-party partners, co-tenants or co-venturers. As of December 31, 2023, we had an aggregate carrying value in joint ventures totaling $3.0 billion.
Certain of our joint venture agreements contain terms in favor of our partners that could have an adverse effect on the value of our investments in the joint ventures.
Each of our joint venture agreements has been individually negotiated with our partner in the joint venture and, in some cases, we have agreed to terms that are more favorable to our partner in the joint venture than to us. For example, our partner may be entitled to a specified portion of the profits of the joint venture before we are entitled to any portion of such profits. We may also enter into similar arrangements in the future.
We are dependent on external sources of capital.
We need a substantial amount of capital to operate and grow our business. This need is exacerbated by the distribution requirements imposed on us for SL Green to qualify as a REIT. We therefore rely on third-party sources of capital, which may not be available on favorable terms or at all. Our access to third-party sources of capital depends on a number of things, including the market's perception of our growth potential and our current and potential future earnings. In addition, we may raise money in the public equity and debt markets and our ability to do so will depend upon the general conditions prevailing in these markets. At any time, conditions may exist which effectively prevent us, or REITs in general, from accessing these markets. Moreover, additional equity offerings may result in substantial dilution of our stockholders' interests, and additional debt financing may substantially increase our leverage.
19

Table of Contents
RISKS RELATED TO OUR ORGANIZATION AND STRUCTURE
We depend on dividends and distributions from our direct and indirect subsidiaries.
Substantially all of our assets are held through subsidiaries of our Operating Partnership. We are, therefore, dependent on the results of operations of our subsidiaries and their ability to provide us with cash, whether in the form of dividends paid through our Operating Partnership, loans or otherwise, to meet our obligations and to pay any dividends to our equity holders. Any distributions to us from those subsidiaries may be subject to contractual and other restrictions, including such subsidiaries' obligations to their creditors, and could be subject to other business and operational considerations. Additionally, our Operating Partnership's ability to distribute to us any cash that it receives from our subsidiaries will also depend on its ability to first satisfy its obligations to its creditors and make distributions payable to holders of its outstanding preferred units and any additional preferred units it may issue from time to time.
In addition, our participation in any distribution of the assets of any of our direct or indirect subsidiaries upon any liquidation, reorganization or insolvency is only after the claims of the creditors, including trade creditors and preferred security holders, are satisfied.
Our charter documents, debt instruments and applicable law may hinder any attempt to acquire us, which could discourage takeover attempts and prevent our stockholders from receiving a premium over the market price of our stock.
Provisions of our charter and bylaws could inhibit changes in control.
A change of control of our company could benefit stockholders by providing them with a premium over the then-prevailing market price of our stock. However, provisions contained in our charter and bylaws may delay or prevent a change in control of our company. These provisions, discussed more fully below, are:
•Ownership limitations;
•Maryland takeover statutes that may prevent a change of control of our company; and
•Contractual provisions that limit the assumption of certain of our debt.
We have a stock ownership limit.
To remain qualified as a REIT for federal income tax purposes, not more than 50% in value of our outstanding capital stock may be owned by five or fewer individuals at any time during the last half of any taxable year. For this purpose, stock may be "owned" directly, as well as indirectly under certain constructive ownership rules, including, for example, rules that attribute stock held by one shareholder to another shareholder. In part to avoid violating this rule regarding stock ownership limitations and maintain our REIT qualification, our charter prohibits direct or indirect ownership by any single stockholder of more than 9.0% in value or number of shares of our common stock. Limitations on the ownership of preferred stock may also be imposed by us.
Our board of directors has the discretion to raise or waive this limitation on ownership for any stockholder if deemed to be in our best interest. Our board of directors has granted such waivers from time to time. To obtain a waiver, a stockholder must present the board and our tax counsel with evidence that ownership in excess of this limit will not affect our present or future REIT status.
Absent any exemption or waiver, stock acquired or held in excess of the limit on ownership will be transferred to a trust for the exclusive benefit of a designated charitable beneficiary, and the stockholder's rights to distributions and to vote would terminate. The stockholder would be entitled to receive, from the proceeds of any subsequent sale of the shares transferred to the charitable trust, the lesser of: the price paid for the stock or, if the owner did not pay for the stock, the market price of the stock on the date of the event causing the stock to be transferred to the charitable trust; and the amount realized from the sale.
This limitation on ownership of stock could delay or prevent a change in control of our company.
Maryland takeover statutes may prevent a change of control of our company, which could depress our stock price.
Under the Maryland General Corporation Law, or the MGCL, "business combinations" between a Maryland corporation and an interested stockholder or an affiliate of an interested stockholder are prohibited for five years after the most recent date on which the interested stockholder becomes an interested stockholder. These business combinations include a merger, consolidation, share exchange or, in circumstances specified in the statute, an asset transfer or issuance or reclassification of equity securities. An interested stockholder is defined as:
•any person who beneficially owns 10% or more of the voting power of the corporation's outstanding voting stock; or
•an affiliate or associate of the corporation who, at any time within the two year period prior to the date in question, was the beneficial owner of 10% or more of the voting power of the then outstanding voting stock of the corporation.
20

Table of Contents
A person is not an interested stockholder under the statute if the board of directors approves in advance the transaction by which he otherwise would have become an interested stockholder.
After the five year prohibition, any business combination between the Maryland corporation and an interested stockholder generally must be recommended by the board of directors of the corporation and approved by the affirmative vote of at least:
•80% of the votes entitled to be cast by holders of outstanding shares of voting stock of the corporation, voting together as a single group; and
•two-thirds of the votes entitled to be cast by holders of voting stock of the corporation other than shares held by the interested stockholder with whom or with whose affiliate the business combination is to be effected or held by an affiliate or associate of the interested stockholder.
The business combination statute may discourage others from trying to acquire control of us and increase the difficulty of consummating any offer, including potential acquisitions that might involve a premium price for our common stock or otherwise be in the best interest of our stockholders.
In addition, the MGCL provides that holders of "control shares" of a Maryland corporation acquired in a "control share acquisition" will not have voting rights with respect to the control shares except to the extent approved by a vote of two-thirds of the votes entitled to be cast on the matter, excluding shares of stock owned by the acquiror, by officers of the corporation or by directors who are employees of the corporation. "Control shares" means voting shares of stock that, if aggregated with all other shares of stock owned by the acquiror or in respect of which the acquiror is able to exercise or direct the exercise of voting power (except solely by virtue of a revocable proxy), would entitle the acquiror to exercise voting power in electing directors within one of the following ranges of voting power: (i) one-tenth or more but less than one-third; (ii) one-third or more but less than a majority; or (iii) a majority or more of all voting power. A "control share acquisition" means the acquisition of ownership of, or the power to direct the exercise of voting power with respect to, issued and outstanding control shares, subject to certain exceptions.
We have opted out of the "business combinations" and "control shares" provisions of the MGCL by resolution of our board of directors and a provision in our bylaws, respectively. However, in the future, our board of directors may reverse its decision by resolution and elect to opt in to the MGCL's business combination provisions, or amend our bylaws and elect to opt in to the MGCL's control share provisions.
Additionally, other provisions of the MGCL permit our board of directors, without stockholder approval and regardless of what is provided in our charter or bylaws, to implement certain other takeover defenses, some of which have been implemented through provisions in our charter or bylaws unrelated to the provisions of the MGCL. Such takeover defenses, to the extent implemented now or in the future, may have the effect of inhibiting a third party from making us an acquisition proposal or of delaying, deferring or preventing a change in our control under circumstances that otherwise could provide our stockholders with an opportunity to realize a premium over the then-current market price.
Contractual provisions that limit the assumption of certain of our debt may prevent a change in control.
Certain of our consolidated debt is not assumable and may be subject to significant prepayment penalties. These limitations could deter a change in control of our company.
SL Green's failure to qualify as a REIT would be costly and would have a significant effect on the value of our securities.
We believe we have operated in a manner for SL Green to qualify as a REIT for federal income tax purposes and intend to continue to so operate. Many of the REIT compliance requirements, however, are highly technical and complex. The determination that SL Green is a REIT requires an analysis of factual matters and circumstances. These matters, some of which are not totally within our control, can affect SL Green's qualification as a REIT. For example, to qualify as a REIT, at least 95% of our gross income must come from designated sources that are listed in the applicable tax laws. We are also required to distribute to stockholders at least 90% of our REIT taxable income excluding capital gains. The fact that we hold our assets through the Operating Partnership and its subsidiaries further complicates the application of the REIT requirements. Even a technical or inadvertent mistake could jeopardize our REIT status. Furthermore, Congress and the Internal Revenue Service, or the IRS, might make changes to the tax laws and regulations that make it more difficult, or impossible, for us to remain qualified as a REIT.
If SL Green fails to qualify as a REIT, the funds available for distribution to our stockholders would be substantially reduced as we would not be allowed a deduction for dividends paid to our stockholders in computing our taxable income and would be subject to federal income tax at regular corporate rates and possibly increased state and local taxes.
21

Table of Contents
Also, unless the IRS grants us relief under specific statutory provisions, SL Green would remain disqualified as a REIT for four years following the year in which SL Green first failed to qualify. If SL Green failed to qualify as a REIT, SL Green would have to pay significant income taxes and would therefore have less money available for investments, to service debt obligations or to pay dividends and distributions to security holders. This would have a significant adverse effect on the value of our securities. In addition, the REIT tax laws would no longer obligate us to make any distributions to stockholders. As a result of all these factors, if SL Green fails to qualify as a REIT, this could impair our ability to expand our business and raise capital.
We may in the future pay taxable dividends on our common stock in common stock and cash.
In order to qualify as a REIT, we are required to annually distribute to our stockholders at least 90% of our REIT taxable income, excluding net capital gains. In order to avoid taxation of our income, we are required to annually distribute to our stockholders all of our taxable income, including net capital gains. In order to satisfy these requirements, we have, and in the future may make distributions that are payable partly in cash and partly in shares of our common stock. If we pay such a dividend, taxable stockholders would be required to include the entire amount of the dividend, including the portion paid with shares of common stock, as income to the extent of our current and accumulated earnings and profits, and may be required to pay income taxes with respect to such dividends in excess of the cash dividends received.
RISKS RELATED TO LEGAL AND REGULATORY MATTERS
We may incur costs to comply with governmental laws and regulations.
We are subject to various federal, state and local environmental and health and safety laws that can impose liability on current and former property owners or operators for the clean-up of certain hazardous substances released on a property or of contamination at any facility (e.g., a landfill) to which we have sent hazardous substances for treatment or disposal, without regard to fault or whether the release or disposal was in compliance with law. Being held responsible for such a clean-up could result in significant cost to us and have a material adverse effect on our financial condition and results of operations.
Our properties may be subject to risks relating to current or future laws, including laws benefiting disabled persons, such as the Americans with Disabilities Act, or ADA, and state or local zoning, construction or other regulations. Compliance with such laws may require significant property modifications in the future, which could be costly. Non-compliance could result in fines being levied against us in the future.
Compliance with changing or new regulations applicable to corporate governance and public disclosure may result in additional expenses, or affect our operations.
Changing or new laws, regulations and standards relating to corporate governance and public disclosure, including SEC regulations and NYSE rules, can create uncertainty for public companies. These changed or new laws, regulations and standards are subject to varying interpretations in many cases due to their lack of specificity. As a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies, which could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices. We are committed to maintaining high standards of corporate governance and public disclosure. If our efforts to comply with new or changed laws, regulations and standards differ from the activities intended by regulatory or governing bodies due to ambiguities related to practice, our reputation may be harmed.
Our efforts to comply with evolving laws, regulations and standards have resulted in, and are likely to continue to result in, increased general and administrative expenses and a diversion of management time and attention from revenue-generating activities to compliance activities. In particular, our continued efforts to comply with Section 404 of the Sarbanes-Oxley Act of 2002 and the related regulations regarding our required assessment of our internal controls over financial reporting and our external auditors' audit of that assessment have required the commitment of significant financial and managerial resources. We expect these efforts to require the continued commitment of significant resources. Further, our directors, chief executive officer and chief financial officer could face an increased risk of personal liability in connection with the performance of their duties. As a result, we may have difficulty attracting and retaining qualified directors and executive officers, which could harm our business.
Our property taxes could increase due to reassessment or property tax rate changes.
We are required to pay real property taxes or payments in lieu of taxes in respect of our properties and such taxes may increase as our properties are reassessed by taxing authorities or as property tax rates change. An increase in the assessed value of our properties or our property tax rates could adversely impact our financial condition, results of operations and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.
22

Table of Contents
GENERAL RISK FACTORS
The trading price of our common stock has been and may continue to be subject to wide fluctuations.
Between January 1, 2023 and December 31, 2023, the closing sale price of our common stock on the New York Stock Exchange, or the NYSE, ranged from $19.96 to $48.00 per share. Our stock price may fluctuate in response to a number of events and factors, such as those described elsewhere in this "Risk Factors" section. Equity issuances or buybacks by us or the perception that such issuances or buybacks may occur may also affect the market price of our common stock.
Future issuances of common stock, preferred stock or convertible debt could dilute existing stockholders' interests.
Our charter authorizes our Board of Directors to issue additional shares of common stock, preferred stock and convertible equity or debt without stockholder approval and without the requirement to offer rights of pre-emption to existing stockholders. Any such issuance could dilute our existing stockholders' interests. Also, any future series of preferred stock may have voting provisions that could delay or prevent a change of control of our company.
Changes in market conditions could adversely affect the market price of our common stock.
As with other publicly traded equity securities, the value of our common stock depends on various market conditions, which may change from time to time. In addition to the current economic environment and future volatility in the securities and credit markets, the following market conditions may affect the value of our common stock:
•the general reputation of REITs and the attractiveness of our equity securities in comparison to other equity securities, including securities issued by other real estate-based companies;
•our financial performance; and
•general stock and bond market conditions.
The market value of our common stock is based on a number of factors including, but not limited to, the market's perception of the current and future value of our assets, our growth potential and our current and potential future earnings and cash dividends. Consequently, our common stock may trade at prices that are higher or lower than our net asset value per share of common stock.
Changes to U.S. federal income tax laws could materially and adversely affect us and our stockholders.
U.S. federal income tax laws and the rules dealing with U.S. federal income taxation are continually under review by Congress, the IRS, and the U.S. Department of the Treasury. Any such changes could have an adverse effect on an investment in our shares or on the market value or the resale potential of our assets.
Loss of key personnel could harm our operations and our stock price.
We are dependent on the efforts of Marc Holliday, our chairman, chief executive officer and interim president. Mr. Holliday has an employment agreement which expires in January 2025. A loss of Mr. Holliday's services could adversely affect our operations and could be negatively perceived by the market resulting in a decrease in our stock price.
23

Table of Contents
Our business and operations would suffer in the event of system failures or cyber security attacks.
Despite system redundancy, the implementation of security measures and the preparation of a disaster data recovery plan, our internal information technology (“IT”) networks and third-party systems on which we rely are vulnerable to a number of risks including energy blackouts, natural disasters, terrorism, war, telecommunication failures and cyber attacks and intrusions, such as phishing attacks, ransomware, data breaches and unauthorized access, including from persons inside our organization or from persons outside our organization with access to our systems. The risk of a security breach or disruption, particularly through cyber attacks and intrusions, including by hackers, foreign governments and cyber terrorists, has generally increased as the number, intensity and sophistication of attempted attacks and intrusions from around the world have increased. Like other businesses, we have experienced cyber incidents in the past, which were not individually, or in the aggregate, material, and we may be subject to cyber attacks in the future. Our systems are critical to the operation of our business, as well as certain of our tenants, and a system failure, accident or security breach could result in a material disruption to our business and operations. We have and may also incur additional costs to remedy damages caused by such disruptions. Although we make efforts to maintain the security and integrity of our systems and have implemented various measures designed to manage the risk of a security breach or disruption, there can be no assurance that our security efforts and measures will be effective or that attempted security breaches or disruptions would not be successful or damaging. Any compromise of our security could also result in a violation of applicable privacy and other laws, significant legal and financial exposure, damage to our reputation and relationships with tenants and vendors, loss or misappropriation of data (which may be confidential, proprietary and/or commercially sensitive in nature) and a loss of confidence in our security measures, which could harm our business.
Forward-looking statements may prove inaccurate.
See Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations—Forward-looking Information," for additional disclosure regarding forward-looking statements.
ITEM 1B. UNRESOLVED STAFF COMMENTS
As of December 31, 2023, we did not have any unresolved comments with the staff of the SEC.
ITEM 1C. CYBERSECURITY
Risk Management and Strategy
The Company's business and proprietary information, information technology and operational technology assets are important to its success. The Company’s cybersecurity program is designed to protect its information assets and operations from external and internal cyber threats by seeking to mitigate and manage risks while helping to ensure business resiliency. The program is applied across all levels of the Company.
The Company takes a risk-based approach to cybersecurity and has implemented policies that are designed to address cybersecurity threats and incidents, including those related to third-party service providers. The Company assesses risks from cybersecurity threats, monitors its information systems for potential vulnerabilities and tests those systems pursuant to the Company's cybersecurity standards, processes and practices, as part of the Company's overall risk management system. The Company also leverages external resources and advisors as needed to reinforce its cybersecurity capacity. External consultants perform testing exercises to further assess the Company’s cybersecurity program on an annual basis, or more frequently if circumstances warrant such testing.
The Company’s cybersecurity strategy is guided by prioritized risk, the National Institute for Standards and Technology (NIST) Cybersecurity Framework, and emerging business needs. The Company maintains a cybersecurity incident response plan, as well as a monitoring program, to support senior leadership and the Board.
The Company’s cybersecurity team manages its incident response plan and monitoring program. Company employees are provided cybersecurity awareness training, which includes topics on the Company’s policies and procedures for reporting potential incidents. The Company’s cybersecurity team is focused on evaluating emerging risks, regulations, and compliance matters and updating the policies and procedures accordingly.
To date, cybersecurity risks, including as a result of any previous cybersecurity incidents, have not materially affected and we believe are not reasonably likely to affect the Company, including its business strategy, results of operations or financial condition. Refer to the risk factor captioned “Our business and operations would suffer in the event of system failures or cyber security attacks” in Part I, Item 1A. “Risk Factors” for additional description of cybersecurity risks and potential related impacts on the Company.
Governance
24

Table of Contents
The Board oversees the Company’s risk management process directly and through its committees. Pursuant to the Audit Committee Charter, the Audit Committee of the Board provides compliance oversight to the Company’s risk assessment and risk management policies and the steps management has taken to monitor and mitigate such exposures and risks.
The Company’s Senior Director, Information Security & Network Systems, in coordination with the Senior Vice President, Information Technology, is responsible for leading the assessment and management of cybersecurity risks. The Senior Director, Information Security & Network Systems and Senior Vice President, Information Technology regularly review and assess cybersecurity initiatives and are informed about and monitor the prevention, detection, mitigation, and remediation of cybersecurity incidents through briefings with internal and external personnel as well as alerts from security measures deployed in the Company's IT environment. These individuals collectively have over 30 years of experience in information security. The Senior Vice President, Information Technology reports to the Board, the Audit Committee and management on cybersecurity risk assessment, policies, incident prevention, detection, mitigation, and remediation of cybersecurity incidents on an as needed basis.
ITEM 2. PROPERTIES
Our Portfolio
General
As of December 31, 2023, we owned or held interests in 13 consolidated commercial office buildings encompassing approximately 8.4 million rentable square feet and 12 unconsolidated commercial office buildings encompassing approximately 15.4 million rentable square feet located primarily in midtown Manhattan. Many of these buildings include some amount of retail space on the lower floors, as well as basement/storage space. As of December 31, 2023, our portfolio also included ownership interests in one consolidated property, encompassing seven commercial office buildings totaling approximately 0.9 million rentable square feet, in Stamford Connecticut, which we refer to as our Suburban property. Some of these buildings also include a small amount of retail space on the lower floors, as well as basement/storage space.
25

Table of Contents
As of December 31, 2023, we also owned or held interests in 10 prime retail properties encompassing approximately 0.3 million square feet, 6 buildings in differing stages of development or redevelopment encompassing approximately 4.3 million square feet, and 2 residential building encompassing 209 residential units and 484 dormitory beds, respectively, encompassing approximately 0.4 million square feet. In addition, we manage one office building and one retail building owned by a third party encompassing approximately 0.4 million square feet and held debt and preferred equity investments with a book value of $346.7 million, excluding $7.9 million of investments recorded in balance sheet line items other than the Debt and preferred equity investments line item.
The following tables set forth certain information with respect to each of the Manhattan and Suburban office, prime retail, residential, development and redevelopment properties in the portfolio as of December 31, 2023 (dollars in thousands):

Properties |  | Ownership Interest (%) |  | SubMarket |  | Square Feet (1) |  | % Occupied (2) |  | % Leased (3) |  | Annualized Contractual Cash Rent ($'s) |  | Annualized Contractual Cash Rent SLG Share ($'s) |  | Total Tenants
MANHATTAN CONSOLIDATED OFFICE PROPERTIES |  |  |  |  |  |  |  |  |  |  |  |
"Same Store" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
100 Church Street |  | 100.0 |  | Downtown |  | 1,047,500 |  |  | 90.3 |  | 92.9 |  | $ | 47,097 |  |  | $ | 47,097 |  |  | 18
110 Greene Street |  | 100.0 |  | Soho |  | 223,600 |  |  | 89.7 |  | 90.3 |  | 17,966 |  |  | 17,966 |  |  | 55
125 Park Avenue |  | 100.0 |  | Grand Central |  | 604,245 |  |  | 99.3 |  | 99.3 |  | 48,039 |  |  | 48,039 |  |  | 24
304 Park Avenue South |  | 100.0 |  | Midtown South |  | 215,000 |  |  | 100.0 |  | 100.0 |  | 18,547 |  |  | 18,547 |  |  | 7
420 Lexington Ave (Graybar) |  | 100.0 |  | Grand Central North |  | 1,188,000 |  |  | 86.6 |  | 87.3 |  | 81,510 |  |  | 81,510 |  |  | 167
461 Fifth Avenue |  | 100.0 |  | Midtown |  | 200,000 |  |  | 76.0 |  | 76.0 |  | 13,949 |  |  | 13,949 |  |  | 13
485 Lexington Avenue |  | 100.0 |  | Grand Central North |  | 921,000 |  |  | 73.9 |  | 76.3 |  | 46,469 |  |  | 46,469 |  |  | 27
555 West 57th Street |  | 100.0 |  | Midtown West |  | 941,000 |  |  | 97.8 |  | 97.8 |  | 55,679 |  |  | 55,679 |  |  | 10
711 Third Avenue |  | 100.0 (3) |  | Grand Central North |  | 524,000 |  |  | 95.3 |  | 95.3 |  | 34,953 |  |  | 34,953 |  |  | 21
810 Seventh Avenue |  | 100.0 |  | Times Square |  | 692,000 |  |  | 81.3 |  | 82.0 |  | 40,523 |  |  | 40,523 |  |  | 40
1185 Avenue of the Americas |  | 100.0 |  | Rockefeller Center |  | 1,062,000 |  |  | 70.7 |  | 74.4 |  | 67,582 |  |  | 67,582 |  |  | 12
1350 Avenue of the Americas |  | 100.0 |  | Rockefeller Center |  | 562,000 |  |  | 72.0 |  | 75.2 |  | 32,790 |  |  | 32,790 |  |  | 43
Subtotal / Weighted Average |  | 8,180,345 |  |  | 85.1% |  | 86.6% |  | $ | 505,104 |  |  | $ | 505,104 |  |  | 437
"Non Same Store" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
885 Third Avenue |  | 100.0 |  | Midtown/Plaza District |  | 218,796 |  |  | 81.3 |  | 81.3 |  | $ | 11,612 |  |  | $ | 11,612 |  |  | 12
Subtotal / Weighted Average |  | 218,796 |  |  | 81.3% |  | 81.3% |  | $ | 11,612 |  |  | $ | 11,612 |  |  | 12
Total / Weighted Average Manhattan Consolidated Office Properties |  | 8,399,141 |  |  | 85.0% |  | 86.4% |  | $ | 516,716 |  |  | $ | 516,716 |  |  | 449
MANHATTAN UNCONSOLIDATED OFFICE PROPERTIES |  |  |  |  |  |  |  |  |  |  |  |
"Same Store" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
10 East 53rd Street |  | 55.0 |  | Plaza District |  | 354,300 |  |  | 98.1 |  | 98.1 |  | $ | 33,529 |  |  | $ | 18,441 |  |  | 40
11 Madison Avenue |  | 60.0 |  | Park Avenue South |  | 2,314,000 |  |  | 96.2 |  | 96.2 |  | 168,090 |  |  | 100,854 |  |  | 9
100 Park Avenue |  | 50.0 |  | Grand Central South |  | 834,000 |  |  | 77.4 |  | 77.4 |  | 55,913 |  |  | 27,956 |  |  | 36
280 Park Avenue |  | 50.0 |  | Park Avenue |  | 1,219,158 |  |  | 94.1 |  | 94.1 |  | 134,037 |  |  | 67,019 |  |  | 37
800 Third Avenue |  | 60.5 |  | Grand Central North |  | 526,000 |  |  | 78.8 |  | 83.4 |  | 31,670 |  |  | 19,161 |  |  | 38
919 Third Avenue |  | 51.0 |  | Grand Central North |  | 1,454,000 |  |  | 80.0 |  | 80.0 |  | 83,623 |  |  | 42,648 |  |  | 9
1515 Broadway |  | 56.9 |  | Times Square |  | 1,750,000 |  |  | 99.7 |  | 99.7 |  | 136,705 |  |  | 77,785 |  |  | 7
Worldwide Plaza (4) |  | 25.0 |  | Westside |  | 2,048,725 |  |  | 91.8 |  | 91.8 |  | 146,260 |  |  | 36,491 |  |  | 22
Added to Same Store in 2023 |  |  |  |  |  |  |  |  |  |  |  |
One Vanderbilt Avenue |  | 71.0 |  | Grand Central |  | 1,657,198 |  |  | 97.8 |  | 99.4 |  | 272,560 |  |  | 193,545 |  |  | 39
220 East 42nd Street |  | 51.0 |  | Grand Central |  | 1,135,000 |  |  | 88.4 |  | 88.4 |  | 67,721 |  |  | 34,538 |  |  | 31
Subtotal / Weighted Average |  | 13,292,381 |  |  | 91.7% |  | 92.1% |  | $ | 1,130,108 |  |  | $ | 618,438 |  |  | 268
"Non Same Store" |  |  |  |  |  |  |  |  |  |  |  |
245 Park Avenue |  | 50.1 |  | Park Avenue |  | 1,782,793 |  |  | 74.6 |  | 83.2 |  | $ | 132,115 |  |  | $ | 66,189 |  |  | 13
450 Park Avenue |  | 25.1 |  | Park Avenue |  | 337,000 |  |  | 82.3 |  | 92.5 |  | 34,979 |  |  | 8,780 |  |  | 21
Subtotal / Weighted Average |  | 2,119,793 |  |  | 75.8% |  | 84.7% |  | $ | 167,094 |  |  | $ | 74,969 |  |  | 34
Total / Weighted Average Manhattan Unconsolidated Office Properties |  | 15,412,174 |  |  | 89.5% |  | 91.1% |  | $ | 1,297,202 |  |  | $ | 693,407 |  |  | 302
Manhattan Office Grand Total / Weighted Average |  | 23,811,315 |  |  | 87.9% |  | 89.4% |  | $ | 1,813,918 |  |  | $ | 1,210,123 |  |  | 751
Manhattan Office Same Store Occupancy %—Combined |  | 21,472,726 |  |  | 89.2% |  | 90.0% |  |  |  |  |  |

26

Table of Contents

Properties |  | Ownership Interest (%) |  | SubMarket |  | Square Feet (1) |  | % Occupied (2) |  | % Leased (3) |  | Annualized Contractual Cash Rent ($'s) |  | Annualized Contractual Cash Rent SLG Share ($'s) |  | Total Tenants
SUBURBAN CONSOLIDATED OFFICE PROPERTIES |  |  |  |  |  |  |  |  |  |  |  |
"Same Store" Suburban |  |  |  |  |  |  |  |  |  |  |  |
Landmark Square |  | 100.0 |  | Stamford, Connecticut |  | 862,800 |  |  | 77.1 |  | 77.1 |  | $ | 19,378 |  |  | $ | 19,378 |  |  | 100
Subtotal/Weighted Average |  | 862,800 |  |  | 77.1% |  | 77.1% |  | $ | 19,378 |  |  | $ | 19,378 |  |  | 100
Total / Weighted Average Suburban Consolidated Office Properties |  | 862,800 |  |  | 77.1% |  | 77.1% |  | $ | 19,378 |  |  | $ | 19,378 |  |  | 100
Suburban Office Grand Total / Weighted Average |  | 862,800 |  |  | 77.1% |  | 77.1% |  | $ | 19,378 |  |  | $ | 19,378 |  |  | 100

Properties |  | Ownership Interest (%) |  | SubMarket |  | Square Feet (1) |  | % Occupied (2) |  | % Leased (3) |  | Annualized Contractual Cash Rent ($'s) |  | Annualized Contractual Cash Rent SLG Share ($'s) |  | Total Tenants
RETAIL PROPERTIES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
"Same Store" Retail |  |  |  |  |  |  |  |  |  |  |  |  |  |
85 Fifth Avenue |  | 36.3 |  | Midtown South |  | 12,946 |  |  | 100.0 |  | 100.0 |  | $ | 2,250 |  |  | $ | 816 |  |  | 1
Subtotal/Weighted Average |  | 12,946 |  |  | 100.0% |  | 100.0% |  | $ | 2,250 |  |  | $ | 816 |  |  | 1
"Non Same Store" Retail |  |  |  |  |  |  |  |  |  |  |  |  |  |
760 Madison Avenue |  | 100.0 |  | Plaza District |  | 22,648 |  |  | 100.0 |  | 100.0 |  | $ | 18,362 |  |  | $ | 18,362 |  |  | 1
Subtotal/Weighted Average |  | 22,648 |  |  | 100.0% |  | 100.0% |  | $ | 18,362 |  |  | $ | 18,362 |  |  | 1
Total / Weighted Average Retail Properties |  | 35,594 |  |  | 100.0% |  | 100.0% |  | $ | 20,612 |  |  | $ | 19,178 |  |  | 2

Properties |  | Ownership Interest (%) |  | SubMarket |  | Square Feet (1) |  | Total Units |  | % Occupied (2) |  | % Leased (3) |  | Annualized Contractual Cash Rent ($'s) |  | Annualized Contractual Cash Rent SLG Share ($'s) |  | Average Monthly Rent Per Unit ($'s) (5)
RESIDENTIAL |  |  |  |  |  |  |  |  |  |  |  |  |  |
"Non Same Store" Residential |  |  |  |  |  |  |  |  |  |  |  |  |  |
7 Dey Street |  | 100.0 |  | Lower Manhattan |  | 140,382 |  |  | 209 |  |  | 95.2 |  | 96.7 |  | $ | 11,385 |  |  | $ | 11,384 |  |  | $ | 4,767 |
15 Beekman Street |  | 20.0 |  | Downtown |  | 221,884 |  |  | 484 |  | (6) | 100.0 |  | 100.0 |  | 13,473 |  |  | 2,695 |  |  | — |
Subtotal/Weighted Average |  | 362,266 |  |  | 693 |  |  | 98.6% |  | 99.0% |  | $ | 24,858 |  |  | $ | 14,079 |  |  | $ | 4,767 |
Total / Weighted Average Residential Properties |  | 362,266 |  |  | 693 |  |  | 98.6% |  | 99.0% |  | $ | 24,858 |  |  | $ | 14,079 |  |  | $ | 4,767 |

Properties |  | Ownership Interest (%) |  | SubMarket |  | Square Feet (1) |  | % Occupied (2) |  | % Leased (3) |  | Annualized Contractual Cash Rent ($'s) |  | Annualized Contractual Cash Rent SLG Share ($'s) |  | Total Tenants
DEVELOPMENT/REDEVELOPMENT |  |  |  |  |  |  |  |  |  |  |  |
19 East 65th Street |  | 100.0 |  | Plaza District |  | 14,639 |  |  | 5.5 |  | 5.5 |  | $ | 32 |  |  | $ | 32 |  |  | 1
185 Broadway |  | 100.0 |  | Lower Manhattan |  | 50,206 |  |  | 34.5 |  | 34.5 |  | 3,323 |  |  | 3,323 |  |  | 4
625 Madison Avenue |  | 90.4 |  | Plaza District |  | 563,000 |  |  | — |  | — |  | — |  |  | — |  |  | —
750 Third Avenue |  | 100.0 |  | Grand Central North |  | 780,000 |  |  | 17.7 |  | 17.7% |  | 10,876 |  |  | 10,876 |  |  | 21
One Madison Avenue |  | 25.5 |  | N/A |  | 1,396,426 |  |  | N/A |  | N/A |  | N/A |  | N/A |  | N/A
760 Madison - Residential Condominiums |  | 100.0 |  | N/A |  | 35,926 |  |  | N/A |  | N/A |  | N/A |  | N/A |  | N/A
Subtotal/Weighted Average |  | 2,840,197 |  |  | 11.1% |  | 11.1% |  | $ | 14,231 |  |  | $ | 14,231 |  |  | 26
Total / Weighted Average Development/Redevelopment Properties |  | 2,840,197 |  |  | 11.1% |  | 11.1% |  | $ | 14,231 |  |  | $ | 14,231 |  |  | 26

27

Table of Contents

Properties |  | Ownership Interest (%) |  | SubMarket |  | Square Feet (1) |  | % Occupied (2) |  | % Leased (3) |  | Annualized Contractual Cash Rent ($'s) |  | Annualized Contractual Cash Rent SLG Share ($'s) |  | Total Tenants
ALTERNATIVE STRATEGY PORTFOLIO |  |  |  |  |  |  |  |  |  |  |  |
2 Herald Square (7) |  | 51.0 |  | Herald Square |  | 369,000 |  |  | 34.5 |  | 34.5 |  | $ | 19,815 |  |  | $ | 10,106 |  |  | 4
5 Times Square |  | 31.6 |  | Times Square |  | 1,127,931 |  |  | 23.3 |  | 23.3 |  | 27,069 |  |  | 8,540 |  |  | 3
11 West 34th Street |  | 30.0 |  | Herald Square/Penn Station |  | 17,150 |  |  | 100.0 |  | 100.0 |  | 3,480 |  |  | 1,044 |  |  | 1
115 Spring Street |  | 51.0 |  | Soho |  | 5,218 |  |  | 100.0 |  | 100.0 |  | 3,984 |  |  | 2,032 |  |  | 1
650 Fifth Avenue |  | 50.0 |  | Plaza District |  | 69,214 |  |  | 100.0 |  | 100.0 |  | 40,064 |  |  | 20,032 |  |  | 1
690 Madison Avenue |  | 100.0 |  | Plaza District |  | 7,848 |  |  | 100.0 |  | 100.0 |  | 1,505 |  |  | 1,505 |  |  | 1
717 Fifth Avenue (8) |  | 10.9 |  | Midtown/Plaza District |  | 119,550 |  |  | 90.4 |  | 90.4 |  | 29,362 |  |  | 3,206 |  |  | 5
719 Seventh Avenue |  | 75.0 |  | Times Square |  | 10,040 |  |  | — |  | — |  | — |  |  | — |  |  | —
1552-1560 Broadway |  | 50.0 |  | Times Square |  | 57,718 |  |  | 88.3 |  | 88.3 |  | 30,764 |  |  | 15,382 |  |  | 3
Worldwide Plaza (9) |  | 25.0 |  | Westside |  | 2,048,725 |  |  | 91.8 |  | 91.8 |  | 146,256 |  |  | 36,490 |  |  | 22
Subtotal/Weighted Average |  | 3,832,394 |  |  | 66.0% |  | 66.0% |  | $ | 302,299 |  |  | $ | 98,337 |  |  | 41
Total / Weighted Average Alternative Strategy Portfolio Properties |  | 3,832,394 |  |  | 66.0% |  | 66.0% |  | $ | 302,299 |  |  | $ | 98,337 |  |  | 41

(1)Represents the rentable square footage at the time the property was acquired.
(2)Occupancy for commenced leases.
(3)Occupancy inclusive of leases signed but not yet commenced.
(4)Alternative Strategy Portfolio property.
(5)Calculated based on occupied units. Amount in dollars.
(6)Property occupied by Pace University and used as an academic center and dormitory space. 484 represents number of beds.
(7)The Company closed on the acquisition of additional interests in the joint venture in January 2024, which increased the Company's interest to 95%.
(8)Along with its joint venture partner, the Company closed on the sale of this property in January 2024.
(9)Property included in Manhattan Operating Properties as of December 31, 2023.
Historical Occupancy
Historically, we have achieved materially higher occupancy rates in our Manhattan office portfolio as compared to the overall midtown Manhattan office market, as shown in the following table:

| Occupancy Rate of Manhattan Operating Portfolio (1) |  | Occupancy Rate of Class A Office Properties in the Midtown Manhattan Markets (2)(3) |  | Occupancy Rate of Class B Office Properties in the Midtown Manhattan Markets (2)(3)
December 31, 2023 | 89.4% |  | 78.4% |  | 75.5%
December 31, 2022 | 90.7% |  | 78.4% |  | 76.6%
December 31, 2021 | 92.1% |  | 80.6% |  | 77.1%
December 31, 2020 | 92.4% |  | 85.0% |  | 81.1%
December 31, 2019 | 94.5% |  | 88.8% |  | 87.4%

(1)Includes our consolidated and unconsolidated Manhattan office properties.
(2)Includes vacant space available for direct lease and sublease. Source: Cushman & Wakefield.
(3)The term "Class B" is generally used in the Manhattan office market to describe office properties that are more than 25 years old but that are in good physical condition, enjoy widespread acceptance by high-quality tenants and are situated in desirable locations in Manhattan. Class B office properties can be distinguished from Class A properties in that Class A properties are generally newer properties with higher finishes and frequently obtain the highest rental rates within their markets.
Lease Expirations
Leases in our Manhattan portfolio, as at many other Manhattan office properties, typically have an initial term of seven to fifteen years, compared to typical lease terms of five to ten years in other large U.S. office markets. For the five years ending December 31, 2028, the average annual lease expirations at our Manhattan consolidated and unconsolidated operating properties is expected to be approximately 0.7 million square feet and approximately 0.6 million square feet, respectively, representing an average annual expiration rate of approximately 9.2% and approximately 4.0%, respectively, per year (assuming no tenants exercise renewal or cancellation options and there are no tenant bankruptcies or other tenant defaults).
The following tables set forth a schedule of the annual lease expirations at our Manhattan consolidated and unconsolidated operating properties, respectively, with respect to leases in place as of December 31, 2023 for each of the next ten years and thereafter (assuming that no tenants exercise renewal or cancellation options and that there are no tenant bankruptcies or other tenant defaults):
28

Table of Contents

Manhattan Consolidated Operating Properties
Year of Lease Expiration |  | Number of Expiring Leases (1) |  | Square Footage of Expiring Leases |  | Percentage of Total Square Feet |  | Annualized Cash Rent of Expiring Leases (2) |  | Percentage of Annualized Cash Rent of Expiring Leases |  | Annualized Cash Rent per Square Foot of Expiring Leases (3)
2024(4) |  | 75 |  | 668,722 |  |  | 8.8% |  | $ | 38,699,697 |  |  | 7.5% |  | $ | 57.87 |
2025 |  | 71 |  | 680,624 |  |  | 9.0 |  | 55,301,323 |  |  | 10.7 |  | 81.25 |
2026 |  | 54 |  | 776,991 |  |  | 10.2 |  | 53,956,330 |  |  | 10.4 |  | 69.44 |
2027 |  | 55 |  | 650,165 |  |  | 8.6 |  | 52,559,470 |  |  | 10.2 |  | 80.84 |
2028 |  | 53 |  | 698,668 |  |  | 9.2 |  | 52,371,028 |  |  | 10.1 |  | 74.96 |
2029 |  | 33 |  | 591,177 |  |  | 7.8 |  | 38,909,520 |  |  | 7.5 |  | 65.82 |
2030 |  | 22 |  | 696,540 |  |  | 9.2 |  | 49,396,547 |  |  | 9.6 |  | 70.92 |
2031 |  | 18 |  | 321,405 |  |  | 4.2 |  | 22,841,818 |  |  | 4.4 |  | 71.07 |
2032 |  | 16 |  | 669,608 |  |  | 8.8 |  | 40,664,070 |  |  | 7.9 |  | 60.73 |
2033 & thereafter |  | 60 |  | 1,835,137 |  |  | 24.2 |  | 112,016,314 |  |  | 21.7 |  | 61.04 |
Total/weighted average |  | 457 |  | 7,589,037 |  |  | 100.0% |  | $ | 516,716,117 |  |  | 100.0% |  | $ | 68.09 |

(1)Tenants may have multiple leases.
(2)Represents the monthly contractual rent under existing leases as of December 31, 2023 multiplied by 12. This amount reflects total rent before any rent abatements, deferrals, concessions and includes expense reimbursements, which may be estimated as of such date.
(3)Represents Annualized Cash Rent of Expiring Leases, as described in footnote (2) above, presented on a per square foot basis.
(4)Includes approximately 177,309 square feet and annualized cash rent of $10.0 million occupied by month-to-month holdover tenants whose leases expired prior to December 31, 2023.

Manhattan Unconsolidated Operating Properties
Year of Lease Expiration |  | Number of Expiring Leases (1) |  | Square Footage of Expiring Leases |  | Percentage of Total Square Feet |  | Annualized Cash Rent of Expiring Leases (2) |  | Percentage of Annualized Cash Rent of Expiring Leases |  | Annualized Cash Rent per Square Foot of Expiring Leases (3)
2024(4) |  | 34 |  | 946,092 |  |  | 6.8% |  | $ | 104,741,363 |  |  | 8.1% |  | $ | 110.71 |
2025 |  | 26 |  | 373,433 |  |  | 2.7 |  | 36,125,921 |  |  | 2.8 |  | 96.74 |
2026 |  | 42 |  | 802,152 |  |  | 5.8 |  | 89,411,068 |  |  | 6.9 |  | 111.46 |
2027 |  | 29 |  | 352,724 |  |  | 2.5 |  | 44,741,842 |  |  | 3.4 |  | 126.85 |
2028 |  | 30 |  | 305,851 |  |  | 2.2 |  | 35,200,396 |  |  | 2.7 |  | 115.09 |
2029 |  | 17 |  | 893,912 |  |  | 6.4 |  | 64,603,106 |  |  | 5.0 |  | 72.27 |
2030 |  | 21 |  | 505,445 |  |  | 3.6 |  | 51,835,737 |  |  | 4.0 |  | 102.55 |
2031 |  | 27 |  | 2,912,088 |  |  | 21.0 |  | 219,024,122 |  |  | 16.9 |  | 75.21 |
2032 |  | 15 |  | 1,075,978 |  |  | 7.8 |  | 95,341,186 |  |  | 7.3 |  | 88.61 |
2033 & thereafter |  | 75 |  | 5,714,468 |  |  | 41.2 |  | 556,177,116 |  |  | 42.9 |  | 97.33 |
Total/weighted average |  | 316 |  | 13,882,143 |  |  | 100.0% |  | $ | 1,297,201,857 |  |  | 100.0% |  | $ | 93.44 |

(1)Tenants may have multiple leases.
(2)Represents the monthly contractual rent under existing leases as of December 31, 2023 multiplied by 12. This amount reflects total rent before any rent abatements, deferrals, concessions and includes expense reimbursements, which may be estimated as of such date.
(3)Represents Annualized Cash Rent of Expiring Leases, as described in footnote (2) above, presented on a per square foot basis.
(4)Includes approximately 114,048 square feet and annualized cash rent of $11.9 million occupied by month-to-month holdover tenants whose leases expired prior to December 31, 2023.
Tenant Diversification
As of December 31, 2023, our properties were leased to 920 tenants, which are engaged in a variety of businesses, including, but not limited to, financial services, professional services, technology, advertising, media, information, apparel, business services and government/non-profit. The following table sets forth information regarding the leases with respect to the 20 largest tenants in our properties, which are not intended to be representative of our tenants as a whole, based on the amount of our share of annualized cash rent as of December 31, 2023:
29

Table of Contents

Tenant Name | Property | Lease Expiration (1) | Total Rentable Square Feet | Annualized Cash Rent | SLG Share of Annualized Cash Rent ($) | % of SLG Share of Annualized Cash Rent (2) | Annualized Cash Rent per Square Foot
Paramount Global (formerly ViacomCBS Inc.) | 1515 Broadway | June 2031 | 1,603,126 |  | $ | 105,728 |  | $ | 60,159 |  | 4.5 | % | $ | 65.95 |
| 555 West 57th Street | April 2029 | 180,779 |  | 10,048 |  | 10,047 |  | 0.8 | % | 55.58 |
| 555 West 57th Street | December 2023 | 137,072 |  | 7,251 |  | 7,251 |  | 0.5 | % | 52.90 |
| 1515 Broadway | March 2028 | 9,106 |  | 2,113 |  | 1,203 |  | 0.1 | % | 232.09 |
| Worldwide Plaza | January 2027 | 32,598 |  | 2,526 |  | 630 |  | — | % | 77.49 |
|  |  | 1,962,681 |  | $ | 127,666 |  | $ | 79,290 |  | 5.9 | % | $ | 65.05 |
Credit Suisse Securities (USA), Inc. | 11 Madison Avenue | May 2037 | 1,184,762 |  | $ | 75,934 |  | $ | 45,561 |  | 3.4 | % | $ | 64.09 |
Sony Corporation | 11 Madison Avenue | January 2031 | 578,791 |  | $ | 50,959 |  | $ | 30,575 |  | 2.3 | % | $ | 88.04 |
TD Bank US Holding Company | One Vanderbilt Avenue | July 2041 | 193,159 |  | $ | 25,412 |  | $ | 18,045 |  | 1.3 | % | $ | 131.56 |
| One Vanderbilt Avenue | August 2041 | 6,843 |  | 3,234 |  | 2,296 |  | 0.2 | % | 472.58 |
| 125 Park Avenue | October 2025 | 6,234 |  | 2,029 |  | 2,029 |  | 0.2 | % | 325.47 |
| 125 Park Avenue | October 2030 | 26,536 |  | 1,835 |  | 1,835 |  | 0.1 | % | 69.16 |
| 125 Park Avenue | March 2034 | 25,171 |  | 1,611 |  | 1,611 |  | 0.1 | % | 64.00 |
|  |  | 257,943 |  | $ | 34,121 |  | $ | 25,816 |  | 1.9 | % | $ | 132.28 |
Bloomberg L.P. | 919 Third Avenue | February 2029 | 749,216 |  | $ | 50,549 |  | $ | 25,780 |  | 1.9 | % | $ | 67.47 |
Societe Generale | 245 Park Avenue | October 2032 | 520,831 |  | $ | 50,566 |  | $ | 25,334 |  | 1.9 | % | $ | 97.09 |
Carlyle Investment Management LLC | One Vanderbilt Avenue | September 2036 | 194,702 |  | $ | 32,994 |  | $ | 23,429 |  | 1.7 | % | $ | 169.46 |
The City of New York | 100 Church Street | March 2034 | 510,007 |  | $ | 21,145 |  | $ | 21,145 |  | 1.6 | % | $ | 41.46 |
King & Spalding | 1185 Avenue of the Americas | October 2025 | 218,275 |  | $ | 21,134 |  | $ | 21,134 |  | 1.6 | % | $ | 96.82 |
Metro-North Commuter Railroad Company (3) | 420 Lexington Avenue | November 2034 | 344,873 |  | $ | 19,905 |  | $ | 19,905 |  | 1.5 | % | $ | 57.72 |
| 420 Lexington Avenue | January 2027 | 7,537 |  | 444 |  | 444 |  | — | % | 58.89 |
|  |  | 352,410 |  | $ | 20,349 |  | $ | 20,349 |  | 1.5 | % | $ | 57.74 |
Nike Retail Services, Inc. | 650 Fifth Avenue | January 2033 | 69,214 |  | $ | 40,064 |  | $ | 20,032 |  | 1.5 | % | $ | 578.84 |
WME IMG, LLC | 304 Park Avenue | April 2028 | 174,069 |  | $ | 13,641 |  | $ | 13,641 |  | 1.0 | % | $ | 78.36 |
| 11 Madison Avenue | September 2030 | 104,618 |  | 10,504 |  | 6,303 |  | 0.5 | % | 100.41 |
|  |  | 278,687 |  | $ | 24,145 |  | $ | 19,944 |  | 1.5 | % | $ | 86.64 |
Giorgio Armani Corporation | 760 Madison Avenue | October 2038 | 22,648 |  | $ | 18,362 |  | $ | 18,362 |  | 1.4 | % | $ | 810.76 |
| 717 Fifth Avenue (4) | December 2023 | 46,940 |  | 2,300 |  | 251 |  | — | % | 49.00 |
|  |  | 69,588 |  | $ | 20,662 |  | $ | 18,613 |  | 1.4 | % | $ | 296.92 |
McDermott Will & Emery LLP | One Vanderbilt Avenue | December 2042 | 146,642 |  | $ | 24,857 |  | $ | 17,651 |  | 1.4 | % | $ | 169.51 |
| 420 Lexington Avenue | October 2026 | 10,043 |  | 619 |  | 619 |  | — | % | 61.60 |
|  |  | 156,685 |  | $ | 25,476 |  | $ | 18,270 |  | 1.4 | % | $ | 162.59 |
Toronto Dominion Bank | One Vanderbilt Avenue | April 2042 | 142,892 |  | $ | 20,466 |  | $ | 14,533 |  | 1.1 | % | $ | 143.23 |
| 125 Park Avenue | April 2042 | 52,450 |  | 3,583 |  | 3,583 |  | 0.2 | % | 68.32 |
|  |  | 195,342 |  | $ | 24,049 |  | $ | 18,116 |  | 1.3 | % | $ | 123.12 |
Cravath, Swaine & Moore LLP | Worldwide Plaza | August 2024 | 617,135 |  | $ | 70,134 |  | $ | 17,498 |  | 1.3 | % | $ | 113.64 |
Stone Ridge Holdings Group LP (3) | One Vanderbilt Avenue | December 2037 | 97,652 |  | $ | 22,014 |  | $ | 15,632 |  | 1.2 | % | 225.43
Hess Corp | 1185 Avenue of the Americas | December 2027 | 167,169 |  | $ | 15,540 |  | $ | 15,540 |  | 1.2 | % | $ | 92.96 |
BMW of Manhattan, Inc. | 555 West 57th Street | July 2032 | 226,556 |  | $ | 12,857 |  | $ | 12,857 |  | 1.0 | % | $ | 56.75 |
Greenberg Traurig LLP | One Vanderbilt Avenue | October 2037 | 99,888 |  | $ | 12,661 |  | $ | 8,990 |  | 0.7 | % | $ | 126.75 |
| 420 Lexington Avenue | November 2037 | 49,049 |  | $ | 3,355 |  | $ | 3,356 |  | 0.2 | % | $ | 68.41 |
|  |  | 148,937 |  | $ | 16,016 |  | $ | 12,346 |  | 0.9 | % | $ | 107.54 |
Total |  |  | 8,556,583 |  | $ | 756,374 |  | $ | 487,261 |  | 36.4 | % | $ | 88.40 |

(1)Expiration of current lease term and does not reflect extension options.
(2)SLG Share of Annualized Cash Rent includes Manhattan, Suburban, Retail, Residential and Development / Redevelopment properties.
(3)Tenant pays rent on a net basis. Rent PSF reflects gross equivalent.
(4)The asset was sold in January 2024.
30

Table of Contents
Environmental Matters
Phase I environmental site assessments have been prepared on the properties in our portfolio, in order to assess existing environmental conditions. All of the Phase I assessments met the American Society for Testing and Materials (ASTM) Standard. Under the ASTM Standard, a Phase I environmental site assessment consists of a site visit, an historical record review, a review of regulatory agency data bases and records, and interviews with on-site personnel, with the purpose of identifying potential environmental concerns associated with real estate. These environmental site assessments did not reveal any known environmental liability that we believe will have a material adverse effect on our results of operations or financial condition.
ITEM 3. LEGAL PROCEEDINGS
As of December 31, 2023, the Company and the Operating Partnership were not involved in any material litigation nor, to management's knowledge, was any material litigation threatened against us or our portfolio which if adversely determined could have a material adverse impact on us.
ITEM 4. MINE SAFETY DISCLOSURES
Not Applicable.
31

Table of Contents
PART II
ITEM 5. MARKET FOR REGISTRANTS' COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES
SL GREEN REALTY CORP.
Our common stock trades on the New York Stock Exchange, or the NYSE, under the symbol "SLG." On February 22, 2024, the reported closing sale price per share of common stock on the NYSE was $46.76 and there were 419 holders of record of our common stock.
SL GREEN OPERATING PARTNERSHIP, L.P.
As of December 31, 2023, there were 3,949,448 units of limited partnership interest of the Operating Partnership outstanding and held by persons other than the Company, which received distributions per unit of the same amount and in the same manner as dividends per share were distributed to common stockholders.
There is no established public trading market for the common units of the Operating Partnership. On February 22, 2024, there were 52 holders of record and 69,221,575 common units outstanding, 64,799,013 of which were held by SL Green.
In order for SL Green to maintain its qualification as a REIT, it must make annual distributions to its stockholders of at least 90% of its taxable income (not including net capital gains). SL Green has adopted a policy of paying regular dividends on its common stock, and the Operating Partnership has adopted a policy of paying regular distributions to its common units in the same amount as dividends paid by SL Green. Cash distributions have been paid on the common stock of SL Green and the common units of the Operating Partnership since the initial public offering of SL Green. Distributions are declared at the discretion of the Board of Directors of SL Green and depend on actual and anticipated cash from operations, financial condition, capital requirements, the annual distribution requirements under the REIT provisions of the Internal Revenue Code and other factors SL Green’s Board of Directors may consider relevant.
Each time SL Green issues shares of stock (other than in exchange for common units of limited partnership interest of the Operating Partnership, or OP Units, when such OP Units are presented for redemption), it contributes the proceeds of such issuance to the Operating Partnership in return for an equivalent number of units of limited partnership interest with rights and preferences analogous to the shares issued.
ISSUER PURCHASES OF EQUITY SECURITIES
In August 2016, our Board of Directors approved a share repurchase program under which we could buy up to $1.0 billion of shares of our common stock. The Board of Directors has since authorized five separate $500.0 million increases to the size of the share repurchase program in the fourth quarter of 2017, second quarter of 2018, fourth quarter of 2018, fourth quarter of 2019, and fourth quarter of 2020 bringing the total program size to $3.5 billion.
The following table summarizes share repurchases executed under the program, excluding the redemption of OP units, during the three months ended December 31, 2023:

Period |  | Shares repurchased |  | Average price paid per share |  | Cumulative number of shares repurchased as part of the repurchase plan or programs
October 1-31 |  | — |  | $— |  | 36,107,719
November 1-30 |  | — |  | $— |  | 36,107,719
December 1-31 |  | — |  | $— |  | 36,107,719

SALE OF UNREGISTERED SECURITIES
During the years ended December 31, 2023, 2022, and 2021 we did not issue any shares of our common stock to holders of units of limited partnership interest in the Operating Partnership upon the redemption of such units pursuant to the partnership agreement of the Operating Partnership.
ITEM 6. [RESERVED]
32

Table of Contents
ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Overview
SL Green Realty Corp., which is referred to as SL Green or the Company, a Maryland corporation, and SL Green Operating Partnership, L.P., which is referred to as SLGOP or the Operating Partnership, a Delaware limited partnership, were formed in June 1997 for the purpose of combining the commercial real estate business of S.L. Green Properties, Inc. and its affiliated partnerships and entities. The Company is a self-managed real estate investment trust, or REIT, engaged in the ownership, management, operation, acquisition, development, redevelopment and repositioning of commercial real estate properties, principally office properties, located in the New York metropolitan area, principally Manhattan. Unless the context requires otherwise, all references to "we," "our" and "us" means the Company and all entities owned or controlled by the Company, including the Operating Partnership.
The following discussion related to our consolidated financial statements should be read in conjunction with the financial statements appearing in Item 8 of this Annual Report on Form 10-K. A discussion of our results of operations for the year ended December 31, 2022 compared to the year ended December 31, 2021 is included in Part II, Item 7 Management's Discussion and Analysis of Financial Condition and Results of Operations of our Annual Report on Form 10-K for the year ended December 31, 2022, filed with the SEC on February 17, 2023, and is incorporated by reference into this Annual Report on Form 10-K.
Leasing and Operating
As of December 31, 2023, our same-store Manhattan office property occupancy inclusive of leases signed but not commenced, was 90.0% compared to 91.2% as of December 31, 2022. We signed office leases in Manhattan encompassing approximately 1.8 million square feet, of which approximately 1.2 million square feet represented office leases that replaced previously occupied space.
According to Cushman & Wakefield, 2023 leasing activity in Manhattan totaled approximately 18.0 million square feet. Of the total 2023 leasing activity in Manhattan, the Midtown submarket accounted for approximately 12.6 million square feet, or approximately 70.0%. Manhattan's overall office vacancy went from 22.2% as of December 31, 2022 to 22.8% as of December 31, 2023. Overall average asking rents in Manhattan increased in 2023 by 2.4% from $71.62 per square foot as of December 31, 2022 to $73.33 per square foot as of December 31, 2023, while Manhattan Class A asking rents increased to $80.98 per square foot, up 2.9% from $78.72 as of December 31, 2022.
Acquisition and Disposition Activity
Overall Manhattan sales volume decreased by 39.9% in 2023 to $13.8 billion as compared to $23.0 billion in 2022. In 2023, we continued to sell joint venture interests in quality assets as well as dispose of properties that were considered non-core or had a more limited growth trajectory, raising efficiently priced capital that was used primarily for debt reduction. During the year, we closed on the sales of all or a portion of our interests in 245 Park Avenue, 121 Greene Street and 21 East 66th Street for total gross valuations of $2.0 billion, generating net proceeds to the Company of $176.9 million.
Debt and Preferred Equity
In 2022 and 2023, in our debt and preferred equity portfolio we continued to focus on underwriting financings for owners, acquirers or developers of properties in New York City. At the same time, we selectively sold certain investments, some investments were repaid, and we converted some investments into equity ownership, the proceeds of which were utilized to repurchase shares of common stock or for debt repayment. Our investment strategy provides us with the opportunity to fill a need for additional debt financing, while achieving attractive risk adjusted returns to us on the investments and receiving a significant amount of additional information on the New York City real estate market. During 2023, our debt and preferred equity activities included $80.3 million, inclusive of advances under future funding obligations, discount and fee amortization, and paid-in-kind interest, net of premium amortization, and investments with a carrying value of $349.9 million that were transferred to equity ownership.
For descriptions of significant activities in 2023, refer to "Part I, Item 1. Business - Highlights from 2023."
33

Table of Contents
Critical Accounting Policies and Estimates
Our discussion and analysis of financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, and contingencies as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. We evaluate our assumptions and estimates on an ongoing basis. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. We believe the following critical accounting policies affect our more significant judgments and estimates used in the preparation of our consolidated financial statements.
Investment in Commercial Real Estate Properties
Real estate properties are presented at cost less accumulated depreciation and amortization. Costs directly related to the development or redevelopment of properties are capitalized. Ordinary repairs and maintenance are expensed as incurred; major investments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives.
We recognize the assets acquired, liabilities assumed (including contingencies) and any noncontrolling interests in an acquired entity by allocating the purchase price, including transaction costs, at their respective fair values on the acquisition date.
We allocate the purchase price of real estate to land and building (inclusive of tenant improvements) and, if determined to be material, intangibles, such as the value of above- and below-market leases and origination costs associated with the in-place leases.
The allocation of the purchase price to the tangible and intangible assets acquired and liabilities assumed involves subjectivity as the allocations are based on an analysis of the respective fair values. In determining the fair value of the real estate acquired, the Company will use a third-party valuation which primarily utilizes cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts. We assess fair value of the acquired leases based on estimated cash flow projections that utilize appropriate discount rates and available market information. Estimates of future cash flows are based on a number of factors including the historical operating results, known trends, and market/economic conditions that may affect the property. The determined and allocated fair values to the real estate acquired will affect the amount of depreciation and amortization we record over the respective estimated useful lives or term of the lease.
The Company classifies those leases under which the Company is the lessee at lease commencement as finance or operating leases. Leases qualify as finance leases if i) the lease transfers ownership of the asset at the end of the lease term, ii) the lease grants an option to purchase the asset that we are reasonably certain to exercise, iii) the lease term is for a major part of the remaining economic life of the asset, or iv) the present value of the lease payments exceeds substantially all of the fair value of the asset. Leases that do not qualify as finance leases are deemed to be operating leases. On the consolidated statements of operations, operating leases are expensed through operating lease rent while financing leases are expensed through amortization and interest expense.
We incur a variety of costs in the development and leasing of our properties. After the determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. Determination of when a development project is substantially complete and capitalization must cease involves a degree of judgment. The costs of land and building under development include specifically identifiable costs. The capitalized costs include, but are not limited to, pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs and other costs incurred during the period of development. We consider a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year after major construction activity ceases. We cease capitalization on the portions substantially completed and occupied or held available for occupancy and capitalize only those costs associated with the portions under construction.
34

Table of Contents
On a periodic basis, we assess whether there are any indications that the value of our consolidated real estate properties may be impaired or that their carrying value may not be recoverable. A consolidated property's value is considered impaired if management's estimate of the aggregate future cash flows (undiscounted) to be generated by the property is less than the carrying value of the property. To the extent impairment has occurred, the loss will be measured as the excess of the carrying amount of the property over the fair value of the property as calculated in accordance with ASC 820. We assess for impairment indicators based on factors such as, among other things, market conditions, occupancy rates, collections, and the overall operating performance of the asset. If indicators of impairment are present, we evaluate real estate investments for potential impairment primarily utilizing cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts.
We also evaluate our real estate properties for impairment when a property has been classified as held for sale. Real estate assets held for sale are valued at the lower of their carrying value or fair value less costs to sell and depreciation expense is no longer recorded. See Note 4, "Properties Held for Sale and Property Dispositions."
Investments in Unconsolidated Joint Ventures
We account for our investments in unconsolidated joint ventures under the equity method of accounting in cases where we exercise significant influence over, but do not control, these entities and are not considered to be the primary beneficiary. We consolidate those joint ventures that we control or which are variable interest entities (each, a "VIE") and where we are considered to be the primary beneficiary. In all these joint ventures, the rights of the joint venture partner are both protective as well as participating. Unless we are determined to be the primary beneficiary in a VIE, these participating rights preclude us from consolidating these VIE entities. Determining control of the entities can be subjective in assessing which activities of the joint venture most significantly impact the economic performance and whether the rights of the joint venture partner are protective or participating. In making this determination, any new or amended joint venture agreement is assessed by the Company for the activities that most significantly impact the joint venture’s economic performance based on the business purpose and design of the venture. We assess the rights that are conveyed to us in the agreement and evaluate whether we are provided with participating or protective rights over the activities that most significantly impact the entity’s economic performance. We also assess the rights of our joint venture partner. Such participating rights include, among other things, the right to approve/amend the annual budget, leasing of the property to a significant tenant, and approval of tax returns and auditors. If our joint venture partner has substantive participating rights and we are determined not to be the primary beneficiary, we do not consolidate the entity.
These investments are recorded initially at cost, as investments in unconsolidated joint ventures, and subsequently adjusted for equity in net income (loss) and cash contributions and distributions. Equity in net income (loss) from unconsolidated joint ventures is allocated based on our ownership or economic interest in each joint venture and includes adjustments related to basis differences in accounting for the investment. When a capital event (as defined in each joint venture agreement) such as a refinancing occurs, if return thresholds are met, future equity income will be allocated at our increased economic interest. We recognize incentive income from unconsolidated real estate joint ventures as income to the extent it is earned and not subject to a clawback feature. Distributions we receive from unconsolidated real estate joint ventures in excess of our basis in the investment are recorded as offsets to our investment balance if we remain liable for future obligations of the joint venture or may otherwise be committed to provide future additional financial support. We generally finance our joint ventures with non-recourse debt. In certain cases we may provide guarantees or master leases for tenant space, which terminate upon the satisfaction of specified circumstances or repayment of the underlying loans.
We assess our investments in unconsolidated joint ventures for recoverability, and if it is determined that a loss in value of the investment is other than temporary, we write down the investment to its fair value. We evaluate our equity investments for impairment based on each joint ventures' actual and projected cash flows. Aside from charges noted in Note 6, "Investment in Unconsolidated Joint Ventures," we do not believe that the values of any of our equity investments were impaired as of December 31, 2023.
We may originate loans for real estate acquisition, development and construction ("ADC loans") where we expect to receive some of the residual profit from such projects. When the risk and rewards of these arrangements are essentially the same as an investor or joint venture partner, we account for these arrangements as real estate investments under the equity method of accounting for investments. Otherwise, we account for these arrangements consistent with the accounting for our debt and preferred equity investments.
35

Table of Contents
Lease Classification
Lease classification for leases under which the Company is the lessor is evaluated at lease commencement and leases not classified as sales-type leases or direct financing leases are classified as operating leases. Leases qualify as sales-type leases if the contract includes either transfer of ownership clauses, certain purchase options, a lease term representing a major part of the economic life of the asset, or the present value of the lease payments and residual guarantees provided by the lessee exceeds substantially all of the fair value of the asset. Additionally, leasing an asset so specialized that it is not deemed to have any value to the Company at the end of the lease term may also result in classification as a sales-type lease. Leases qualify as direct financing leases when the present value of the lease payments and residual value guarantees provided by the lessee and unrelated third parties exceeds substantially all of the fair value of the asset and collection of the payments is probable.
Revenue Recognition
Rental revenue for operating leases is recognized on a straight-line basis over the term of the lease and we have determined that the collectability of substantially all of the lease payments are probable. If collectability of substantially all of the lease payments is assessed as not probable, rental revenue is recognized only upon actual receipt. The Company assesses the probability of collecting substantially all payments under its leases based on multiple factors, including, among other things, payment history of the lessee, the credit rating of the lessee, historical operations and trends within the lessee’s industry, current and future economic conditions. If collectability of substantially all of the lease payments is assessed as not probable, any difference between the rental revenue recognized to date and the lease payments that have been collected is recognized as a current-period adjustment to rental revenue. A subsequent change in the assessment of collectability to probable may result in a current-period adjustment to rental revenue for any difference between the rental revenue that would have been recognized if collectability had always been assessed as probable and the rental revenue recognized to date.
Rental revenue recognition commences when the leased space is available for its intended use by the lessee. To determine whether the leased space is available for its intended use by the lessee, management evaluates whether we are the owner of tenant improvements for accounting purposes or the tenant is. When management concludes that we are the owner of tenant improvements, rental revenue recognition begins when the tenant takes possession of the finished space, which is when such tenant improvements are substantially complete. In certain instances, when management concludes that we are not the owner of tenant improvements, rental revenue recognition begins when the tenant takes possession of or controls the space.
The excess of rents recognized over amounts contractually due pursuant to the underlying leases are included in deferred rents receivable on the consolidated balance sheets.
In addition to base rent, our tenants also generally will pay their pro rata share of increases in real estate taxes and certain operating expenses for the building over a base year. In some leases, in lieu of paying additional rent based upon increases in certain building operating expenses, the tenant will pay additional rent based upon increases in the wage rate paid to porters over the porters' wage rate in effect during a base year or increases in the consumer price index over the index value in effect during a base year. In addition, many of our leases contain fixed percentage increases over the base rent to cover escalations. Electricity is most often supplied by the landlord either on a sub-metered basis, or rent inclusion basis (i.e., a fixed fee is included in the rent for electricity, which amount may increase based upon increases in electricity rates or increases in electrical usage by the tenant). Base building services other than electricity (such as heat, air conditioning and freight elevator service during business hours, and base building cleaning) are typically provided at no additional cost, with the tenant paying additional rent only for services which exceed base building services or for services which are provided outside normal business hours. These escalations are based on actual expenses incurred in the prior calendar year. If the expenses in the current year are different from those in the prior year, then during the current year, the escalations will be adjusted to reflect the actual expenses for the current year.
The Company provides its tenants with certain customary services for lease contracts such as common area maintenance and general security. We have elected to combine the non-lease components with the lease components of our operating lease agreements and account for them as a single lease component in accordance with ASC 842.
We record a gain or loss on sale of real estate assets when we no longer have a controlling financial interest in the entity owning the real estate, a contract exists with a third party and that third party has control of the assets acquired.
Investment income on debt and preferred equity investments is accrued based on the contractual terms of the instruments and when it is deemed collectible. Some debt and preferred equity investments provide for accrual of interest at specified rates, which differ from current payment terms. Interest is recognized on such loans at the accrual rate subject to management's determination that accrued interest is collectible. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt.
36

Table of Contents
The Company assesses the probability of a borrower’s ability to repay the debt and preferred equity investment similar to the factors noted above. We consider a debt and preferred equity investment to be past due when amounts contractually due have not been paid. Debt and preferred equity investments are placed on a non-accrual status at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of interest income becomes doubtful. Interest income recognition is resumed on any debt or preferred equity investment that is on non-accrual status when such debt or preferred equity investment becomes contractually current and performance is demonstrated to be resumed.
Deferred origination fees, original issue discounts and loan origination costs, if any, are recognized as an adjustment to interest income over the terms of the related investments using the effective interest method. Fees received in connection with loan commitments are also deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield. Discounts or premiums associated with the purchase of loans are amortized or accreted into interest income as a yield adjustment on the effective interest method based on expected cash flows through the expected maturity date of the related investment. If we purchase a debt or preferred equity investment at a discount, intend to hold it until maturity and expect to recover the full value of the investment, we accrete the discount into income as an adjustment to yield over the term of the investment. If we purchase a debt or preferred equity investment at a discount with the intention of foreclosing on the collateral, we do not accrete the discount. For debt investments acquired at a discount for credit quality, the difference between contractual cash flows and expected cash flows at acquisition is not accreted. Anticipated exit fees, the collection of which is expected, are also recognized over the term of the loan as an adjustment to yield.
We may syndicate a portion of the loans that we originate or sell the loans individually. When a transaction meets the criteria for sale accounting, we recognize gain or loss based on the difference between the sales price and the carrying value of the loan sold. Any related unamortized deferred origination fees, original issue discounts, loan origination costs, discounts or premiums at the time of sale are recognized as an adjustment to the gain or loss on sale, which is included in investment income on the consolidated statement of operations. Any fees received at the time of sale or syndication are recognized as part of investment income.
Asset management fees are recognized on a straight-line basis over the term of the asset management agreement.
Revenues from the sale of SUMMIT tickets are recognized upon admission or ticket expirations. Deferred revenue related to unused and unexpired tickets as of December 31, 2023 and 2022 was $2.6 million and $2.0 million, respectively, and is included in Deferred revenue on the consolidated balance sheets.
Debt and Preferred Equity Investments
Debt and preferred equity investments are presented at the net amount expected to be collected in accordance with ASC 326. An allowance for loan losses is deducted from the amortized cost basis of the financial assets to present the net carrying value at the amount expected to be collected through the expected maturity date of such investments. The expense for loan loss and other investment reserves is the charge to earnings to adjust the allowance for loan losses to the appropriate level. Amounts are written off from the allowance when we de-recognize the related investment either as a result of a sale of the investment or acquisition of equity interests in the collateral.
The Company evaluates the amount expected to be collected based on current market and economic conditions, historical loss information, and reasonable and supportable forecasts. The Company's assumptions are derived from both internal data and external data which may include, among others, governmental economic projections for the New York City Metropolitan area, public data on recent transactions and filings for securitized debt instruments. This information is aggregated by asset class and adjusted for duration. Based on these inputs, loans are evaluated at the individual asset level. In certain instances, we may also use a probability-weighted model that considers the likelihood of multiple outcomes and the amount expected to be collected for each outcome.
The evaluation of the possible credit deterioration associated with the performance and/or value of the underlying collateral property as well as the financial and operating capability of the borrower/sponsor requires significant judgment, which include both asset level and market assumptions over the relevant time period.
In addition, quarterly, the Company assigns each loan a risk rating. Based on a 3-point scale, loans are rated “1” through “3,” from lower risk to higher risk, which ratings are defined as follows: 1 - Low Risk Assets - Low probability of loss, 2 - Watch List Assets - Higher potential for loss, 3 - High Risk Assets - Loss more likely than not. Loans with risk ratings of 2 or 3 are evaluated to determine whether the expected risk of loss is appropriately captured through the combination of our expectations of current conditions, historical loss information and supportable forecasts described above or whether risk characteristics specific to the loan warrant the use of a probability-weighted model.
37

Table of Contents
Financing investments that are classified as held for sale are carried at the expected amount to be collected or fair market value using available market information obtained through consultation with dealers or other originators of such investments as well as discounted cash flow models based on Level 3 data pursuant to ASC 820-10. As circumstances change, management may conclude not to sell an investment designated as held for sale. In such situations, the investment will be reclassified at its expected amount to be collected.
Other financing receivables that are included in balance sheet line items other than the Debt and preferred equity investments line are also measured at the net amount expected to the be collected.
Accrued interest receivable amounts related to these debt and preferred equity investment and other financing receivables are recorded at the net amount expected to be collected within Other assets in the consolidated balance sheets. Write offs of accrued interest receivables are recognized as an expense for loan loss and other investment reserves.
38

Table of Contents
Results of Operations
Comparison of the year ended December 31, 2023 to the year ended December 31, 2022
The following comparison for the year ended December 31, 2023, or 2023, to the year ended December 31, 2022, or 2022, makes reference to the effect of the following:
i.“Same-Store Properties,” which represents all operating properties owned by us at January 1, 2022 and still owned by us in the same manner as of December 31, 2023 (Same-Store Properties totaled 20 of our 27 consolidated operating properties),
ii.“Acquisition Properties,” which represents all properties or interests in properties acquired in 2023 and 2022 and all non-Same-Store Properties, including properties that are under development or redevelopment,
iii."Disposed Properties" which represents all properties or interests in properties sold in 2023 and 2022,
iv."Alternative Strategy Portfolio," which represents non-core assets, and
v.“Other,” which represents properties where we sold an interest resulting in deconsolidation and corporate level items not allocable to specific properties, as well as the Service Corporation and eEmerge Inc.

|  | Same-Store |  | Disposed |  | Other |  | Consolidated
(in millions) |  | 2023 |  | 2022 |  | $ Change |  | % Change |  | 2023 |  | 2022 |  | 2023 |  | 2022 |  | 2023 |  | 2022 |  | $ Change |  | % Change
Rental revenue |  | $ | 549.6 |  |  | $ | 556.7 |  |  | $ | (7.1) |  |  | (1.3) | % |  | $ | — |  |  | $ | 0.9 |  |  | $ | 133.7 |  |  | $ | 113.9 |  |  | $ | 683.3 |  |  | $ | 671.5 |  |  | $ | 11.8 |  |  | 1.8 | %
SUMMIT Operator revenue |  | — |  |  | — |  |  | — |  |  | — | % |  | — |  |  | — |  |  | 118.3 |  |  | 89.0 |  |  | 118.3 |  |  | 89.0 |  |  | 29.3 |  |  | 32.9 | %
Investment income |  | — |  |  | — |  |  | — |  |  | — | % |  | — |  |  | — |  |  | 34.7 |  |  | 81.1 |  |  | 34.7 |  |  | 81.1 |  |  | (46.4) |  |  | (57.2) | %
Other income |  | 4.1 |  |  | 3.9 |  |  | 0.2 |  |  | 5.1 | % |  | — |  |  | 10.4 |  |  | 73.3 |  |  | 63.5 |  |  | 77.4 |  |  | 77.8 |  |  | (0.4) |  |  | (0.5) | %
Total revenues |  | 553.7 |  |  | 560.6 |  |  | (6.9) |  |  | (1.2) | % |  | — |  |  | 11.3 |  |  | 360.0 |  |  | 347.5 |  |  | 913.7 |  |  | 919.4 |  |  | (5.7) |  |  | (0.6) | %
Property operating expenses |  | 277.0 |  |  | 266.7 |  |  | 10.3 |  |  | 3.9 | % |  | 0.2 |  |  | 2.0 |  |  | 90.3 |  |  | 70.5 |  |  | 367.5 |  |  | 339.2 |  |  | 28.3 |  |  | 8.3 | %
SUMMIT Operator expenses |  | — |  |  | — |  |  | — |  |  | — | % |  | — |  |  | — |  |  | 101.2 |  |  | 89.2 |  |  | 101.2 |  |  | 89.2 |  |  | 12.0 |  |  | 13.5 | %
Transaction related costs |  | — |  |  | — |  |  | — |  |  | — | % |  | — |  |  | — |  |  | 1.1 |  |  | 0.4 |  |  | 1.1 |  |  | 0.4 |  |  | 0.7 |  |  | 175.0 | %
Marketing, general and administrative |  | — |  |  | — |  |  | — |  |  | — | % |  | — |  |  | — |  |  | 111.4 |  |  | 93.8 |  |  | 111.4 |  |  | 93.8 |  |  | 17.6 |  |  | 18.8 | %
|  | 277.0 |  |  | 266.7 |  |  | 10.3 |  |  | 3.9 | % |  | 0.2 |  |  | 2.0 |  |  | 304.0 |  |  | 253.9 |  |  | 581.2 |  |  | 522.6 |  |  | 58.6 |  |  | 11.2 | %
Other income (expenses): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense and amortization of deferred financing costs, net of interest income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | (145.0) |  |  | $ | (97.3) |  |  | $ | (47.7) |  |  | 49.0 | %
SUMMIT Operator tax expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (9.2) |  |  | (2.6) |  |  | (6.6) |  |  | 253.8 | %
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (247.8) |  |  | (216.2) |  |  | (31.6) |  |  | 14.6 | %
Equity in net loss from unconsolidated joint ventures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (76.5) |  |  | (58.0) |  |  | (18.5) |  |  | 31.9 | %
Equity in net loss on sale of interest in unconsolidated joint venture/real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (13.4) |  |  | (0.1) |  |  | (13.3) |  |  | 13,300.0 | %
Purchase price and other fair value adjustments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (17.3) |  |  | (8.1) |  |  | (9.2) |  |  | 113.6 | %
Loss on sale of real estate, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (32.4) |  |  | (84.5) |  |  | 52.1 |  |  | (61.7) | %
Depreciable real estate reserves and impairments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (382.4) |  |  | (6.3) |  |  | (376.1) |  |  | 5,969.8 | %
Loss on early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (0.9) |  |  | — |  |  | (0.9) |  |  | — | %
Loan loss and other investment reserves, net of recoveries |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (6.9) |  |  | — |  |  | (6.9) |  |  | — | %
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | (599.3) |  |  | $ | (76.3) |  |  | $ | (523.0) |  |  | 685.5 | %

39

Table of Contents
Rental Revenue
Rental revenues increased due primarily to the acquisition of 245 Park Avenue ($23.3 million) during the third quarter of 2022 and prior to its deconsolidation in the second quarter of 2023, offset by a lower contribution from our Same-Store Properties due primarily to reduced occupancy ($7.0 million).
The following table presents a summary of the commenced leasing activity for the year ended December 31, 2023 in our Manhattan portfolio:

| Usable SF |  | Rentable SF |  | New Cash Rent (per rentable SF) (1) |  | Prev. Escalated Rent (per rentable SF) (2) |  | TI/LC per rentable SF |  | Free Rent (in months) |  | Average Lease Term (in years)
Manhattan |  |  |  |  |  |  |  |  |  |  |  |  |
Space available at beginning of the year | 2,227,978 |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired vacancies | 51,490 |  |  |  |  |  |  |  |  |  |  |  |  |
Property out of redevelopment | (56,718) |  |  |  |  |  |  |  |  |  |  |  |  |
Space which became available during the year(3) |  |  |  |  |  |  |  |  |  |  |  |  |
• Office | 1,337,519 |  |  |  |  |  |  |  |  |  |  |  |  |
• Retail | 38,650 |  |  |  |  |  |  |  |  |  |  |  |  |
• Storage | 13,282 |  |  |  |  |  |  |  |  |  |  |  |  |
| 1,389,451 |  |  |  |  |  |  |  |  |  |  |  |  |
Total space available | 3,612,201 |  |  |  |  |  |  |  |  |  |  |  |  |
Leased space commenced during the year: |  |  |  |  |  |  |  |  |  |  |  |  |
• Office(4) | 665,886 |  |  | 727,901 |  |  | $ | 75.65 |  |  | $ | 77.59 |  |  | $ | 68.67 |  |  | 7.3 |  |  | 6.4 |
• Retail | 33,607 |  |  | 36,674 |  |  | $ | 85.04 |  |  | $ | 180.38 |  |  | $ | 69.53 |  |  | 11.1 |  |  | 14.0 |
• Storage | 6,215 |  |  | 8,236 |  |  | $ | 28.00 |  |  | $ | 17.25 |  |  | $ | — |  |  | 3.3 |  |  | 9.9 |
Total leased space commenced | 705,708 |  |  | 772,811 |  |  | $ | 75.59 |  |  | $ | 77.19 |  |  | $ | 67.98 |  |  | 7.5 |  |  | 6.8 |
Total available space at end of year | 2,906,493 |  |  |  |  |  |  |  |  |  |  |  |  |
Early renewals |  |  |  |  |  |  |  |  |  |  |  |  |
• Office | 654,708 |  |  | 723,334 |  |  | $ | 84.08 |  |  | $ | 80.64 |  |  | $ | 41.75 |  |  | 5.8 |  |  | 7.2 |
• Retail | 17,087 |  |  | 17,252 |  |  | $ | 195.10 |  |  | $ | 192.91 |  |  | $ | — |  |  | — |  |  | 4.8 |
• Storage | 5,146 |  |  | 5,554 |  |  | $ | 31.46 |  |  | $ | 33.07 |  |  | $ | — |  |  | 3.6 |  |  | 6.0 |
Total early renewals | 676,941 |  |  | 746,140 |  |  | $ | 86.26 |  |  | $ | 82.88 |  |  | $ | 40.48 |  |  | 5.6 |  |  | 7.1 |
Total commenced leases, including replaced previous vacancy |  |  |  |  |  |  |  |  |  |  |  |  |
• Office |  |  | 1,451,235 |  |  | $ | 79.85 |  |  | $ | 79.41 |  |  | $ | 55.25 |  |  | 6.5 |  |  | 6.8
• Retail |  |  | 53,926 |  |  | $ | 120.25 |  |  | $ | 191.53 |  |  | $ | 47.29 |  |  | 7.5 |  |  | 11.1
• Storage |  |  | 13,790 |  |  | $ | 29.39 |  |  | $ | 24.30 |  |  | $ | — |  |  | 3.4 |  |  | 8.4
Total commenced leases |  |  | 1,518,951 |  |  | $ | 80.83 |  |  | $ | 80.61 |  |  | $ | 54.47 |  |  | 6.6 |  |  | 6.9

(1)Annual initial base rent.
(2)Escalated rent includes base rent plus all additional amounts paid by the tenant in the form of real estate taxes, operating expenses, porters wage or a consumer price index (CPI) adjustment.
(3)Includes expiring space, relocating tenants and move-outs where tenants vacated. Excludes lease expirations where tenants held over.
(4)Average starting office rent excluding new tenants replacing vacancies was $77.08 per rentable square feet for 485,280 rentable square feet. Average starting office rent for office space (leased and early renewals, excluding new tenants replacing vacancies) was $81.27 per rentable square feet for 1,208,614 rentable square feet.
40

Table of Contents
SUMMIT Operator revenue
SUMMIT Operator revenues were higher for the year ended December 31, 2023, compared to the same period in 2022 due primarily to increased attendance.
Investment Income
Investment income decreased due to a lower weighted average debt and preferred equity investment balance and a lower weighted average yield for the period ended December 31, 2023 as compared to the same period in 2022 as well as the recognition of previously unrecorded default interest on our preferred equity investment at 245 Park Avenue in the third quarter of 2022. For the years ended December 31, 2023 and 2022, the weighted average balance of our debt and preferred equity investment portfolio and the weighted average yield were $0.6 billion and 6.2%, respectively, compared to $1.0 billion and 8.3%, respectively. As of December 31, 2023, the debt and preferred equity investment portfolio had a weighted average term to maturity of 1.9 years excluding extension options.
Other Income
Other income decreased primarily due to income related to the resolution of the Company's investment in 1591-1597 Broadway ($5.0 million) in the second quarter of 2022. This decrease was offset by increases in lease termination income ($1.1 million), and an increase in special servicing income for the year ended December 31, 2023 ($1.1 million) as compared to the same period in 2022.
Property Operating Expenses
Property operating expenses increased due primarily to acquiring 245 Park Avenue ($8.6 million) in the third quarter of 2022 and prior to its deconsolidation in the second quarter of 2023, increased variable expenses ($7.5 million) and real estate taxes ($2.8 million) at our Same-Store Properties, and increased variable expenses at our Acquired Properties ($7.8 million), partially offset by decreased variable expenses at our Disposed Properties ($1.2 million).
SUMMIT Operator expenses
SUMMIT Operator expenses were higher for the year ended December 31, 2023, compared to the same period in 2022 due to additional operating hours in 2023 to accommodate demand, which increased variable costs such as labor, security, cleaning and maintenance costs.
Marketing, General and Administrative Expenses
Marketing, general and administrative expenses increased to $111.4 million for the year ended December 31, 2023, compared to $93.8 million for the same period in 2022 due to increased compensation expense related to the non-renewal of the Company's former President ($18.7 million).
Interest Expense and Amortization of Deferred Financing Costs, Net of Interest Income
Interest expense and amortization of deferred financing costs, net of interest income, increased due to rising LIBOR and SOFR rates, higher interest expense from unsecured corporate term loans ($32.9 million) and the revolving credit facility ($20.5 million) for the year ended December 31, 2023 as compared to the year ended December 31, 2022, acquiring 245 Park Avenue in the third quarter of 2022 ($8.0 million) prior to its deconsolidation in the second quarter of 2023, and the refinancing of 100 Church ($7.9 million) in the second quarter of 2022. These increases were offset primarily by the repayment of unsecured bonds ($20.9 million) in the third quarter of 2022. The weighted average consolidated debt balance outstanding was $4.6 billion for the year ended December 31, 2023 as compared to $4.6 billion for the year ended December 31, 2022. The consolidated weighted average interest rate was 4.71% for the year ended December 31, 2023 as compared to 3.55% for the year ended December 31, 2022.
SUMMIT Operator tax expense
The increase in SUMMIT Operator income tax expense for the year ended December 31, 2023 compared to the same period in 2022 was attributable to higher taxable income for SUMMIT Operator.
Depreciation and Amortization
Depreciation and amortization increased primarily due to acquiring 245 Park Avenue ($20.3 million) in the third quarter of 2022 and prior to its deconsolidation in the second quarter of 2023, an increase at our Acquired Properties ($8.6 million) and Same-Store Properties ($2.5 million) for the year ended December 31, 2023.
41

Table of Contents
Equity in net loss from unconsolidated joint ventures
Equity in net loss from unconsolidated joint ventures increased as a result of increased interest expense across our joint venture portfolio ($67.6 million). This was partially offset by additional income at 2 Herald Square ($29.8 million) comprised primarily of holdover rent, interest, settlement income, lease termination income and reimbursement of attorneys' fees collected following the completion of legal proceedings against a former tenant and its guarantor, as well as an increase in income from operations at One Vanderbilt Avenue ($22.9 million).
Equity in net loss on sale of interest in unconsolidated joint venture/real estate
During the year ended December 31, 2023, we recognized losses on the sales of our interests in 21 East 66th Street ($12.7 million) and 121 Greene Street ($0.3 million). During the year ended December 31, 2022, we recognized a loss on the sale of our interest in the Stonehenge Portfolio (less than $0.1 million).
Purchase price and other fair value adjustments
During the year ended December 31, 2023, we recorded a $17.0 million fair value adjustment relating to the 50.1% interest we retained in 245 Park Avenue, which was deconsolidated when a 49.9% joint venture interest was sold. Additionally, we recorded a $10.4 million fair value adjustment related to derivatives that are not designated as hedges for accounting purposes. This was partially offset by a $10.2 million purchase price adjustment related to a previous transaction. During the year ended December 31, 2022, we recorded a $6.4 million fair value adjustment related to an investment in marketable securities and a $1.7 million fair value adjustment related to derivatives that are not designated as hedges.
Loss on sale of real estate, net
During the year ended December 31, 2023, we recognized a loss on the sale of a 49.9% joint venture interest in 245 Park Avenue ($32.8 million). During the year ended December 31, 2022, we recognized losses on the sales of 609 Fifth Avenue ($80.2 million), 885 Third Avenue ($24.0 million) and 707 Eleventh Avenue ($0.8 million), offset by a gain on the sale of 1080 Amsterdam Avenue ($17.9 million).
Depreciable Real Estate Reserves and Impairments
During the year ended December 31, 2023, we recognized depreciable real estate reserves and impairments related to our leasehold interest at 625 Madison Avenue ($272.6 million), which was under contract for sale as of December 31, 2023, 2 Herald Square ($101.7 million) and 1552-1560 Broadway ($8.0 million) following an assessment of the investments for recoverability. During the year ended December 31, 2022, we recognized depreciable real estate reserves and impairments related to 121 Greene Street ($6.3 million) as the investment was under contract for sale as of December 31, 2022.
Loan loss and other investment reserves, net of recoveries
During the year ended December 31, 2023, we recorded $6.9 million of loan loss reserve on one debt and preferred equity investment. During the year ended December 31, 2022, we did not recognize any loan loss and other investment reserves.
Comparison of the year ended December 31, 2022 to the year ended December 31, 2021
For a comparison of the year ended December 31, 2022 to the year ended December 31, 2021, see "Management's Discussion and Analysis of Financial Condition and Results of Operations" in Part II, Item 7 of our Form 10-K for the year ended December 31, 2022, which was filed with the SEC on February 17, 2023.
Liquidity and Capital Resources
We currently expect that the principal sources of funds to meet our short-term and long-term liquidity requirements for working capital, acquisitions, development or redevelopment of properties, tenant improvements, leasing costs, share repurchases, dividends to shareholders, distributions to unitholders, repurchases or repayments of outstanding indebtedness and for debt and preferred equity investments will include:
(1)Cash flow from operations;
(2)Cash on hand;
(3)Net proceeds from divestitures of properties and redemptions, participations, dispositions and repayments of debt and preferred equity investments;
(4)Borrowings under the revolving credit facility;
(5)Other forms of secured or unsecured financing; and
(6)Proceeds from common or preferred equity or debt offerings by the Company or the Operating Partnership (including issuances of units of limited partnership interest in the Operating Partnership and Trust preferred securities).
42

Table of Contents
Cash flow from operations is primarily dependent upon the collectability of rent, the occupancy level of our portfolio, the net effective rental rates achieved on our leases, the collectability of rent, operating escalations and recoveries from our tenants and the level of operating and other costs. Additionally, we believe that our debt and preferred equity investment program will continue to serve as a source of operating cash flow.
The combined aggregate principal maturities of mortgages and other loans payable, the 2021 credit facility, senior unsecured notes (net of discount), trust preferred securities, our share of joint venture debt, including as-of-right extension options and put options, estimated interest expense, and our obligations under our financing and operating leases, as of December 31, 2023 are as follows (in thousands):

| 2024 |  | 2025 |  | 2026 |  | 2027 |  | 2028 |  | Thereafter |  | Total
Property mortgages and other loans | $ | 387,238 |  |  | $ | 370,000 |  |  | $ | 190,148 |  |  | $ | 550,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,497,386 |
Revolving credit facility | — |  |  | — |  |  | — |  |  | 560,000 |  |  | — |  |  | — |  |  | 560,000 |
Unsecured term loans | 200,000 |  |  | — |  |  | — |  |  | 1,050,000 |  |  | — |  |  | — |  |  | 1,250,000 |
Senior unsecured notes | — |  |  | 100,000 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 100,000 |
Trust preferred securities | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 100,000 |  |  | 100,000 |
Financing leases | 3,180 |  |  | 3,228 |  |  | 3,276 |  |  | 3,325 |  |  | 3,375 |  |  | 196,794 |  |  | 213,178 |
Operating leases | 53,455 |  |  | 53,595 |  |  | 53,734 |  |  | 53,746 |  |  | 54,211 |  |  | 1,208,864 |  |  | 1,477,605 |
Estimated interest expense | 173,873 |  |  | 132,568 |  |  | 115,747 |  |  | 35,264 |  |  | 4,829 |  |  | 32,796 |  |  | 495,077 |
Company's share of joint venture debt | 1,822,978 |  |  | 1,670,861 |  |  | 542,968 |  |  | 1,185,168 |  |  | — |  |  | 2,130,300 |  |  | 7,352,275 |
Total | $ | 2,640,724 |  |  | $ | 2,330,252 |  |  | $ | 905,873 |  |  | $ | 3,437,503 |  |  | $ | 62,415 |  |  | $ | 3,668,754 |  |  | $ | 13,045,521 |

We estimate that for the year ending December 31, 2024, we expect to incur $79.0 million of recurring capital expenditures on existing consolidated properties and $80.0 million of development or redevelopment expenditures on existing consolidated properties, none of which will be funded by construction financing facilities or loan reserves. We expect our share of capital expenditures at our joint venture properties will be $183.6 million, of which $99.2 million will be funded by construction financing facilities or loan reserves. We expect to fund capital expenditures from operating cash flow, existing liquidity, and borrowings from construction financing facilities. Future property acquisitions may require substantial capital investments for refurbishment and leasing costs.
As of December 31, 2023, we had liquidity of $0.9 billion, comprised of $688.0 million of availability under our revolving credit facility and $231.4 million of consolidated cash on hand, inclusive of $9.6 million of marketable securities. This liquidity excludes $161.9 million representing our share of cash at unconsolidated joint venture properties. We may seek to divest of properties, interests in properties, or debt and preferred equity investments or access private and public debt and equity capital when the opportunity presents itself, although there is no guarantee that this capital will be made available to us at efficient levels or at all. Management believes that these sources of liquidity, if we are able to access them, along with potential refinancing opportunities for secured and unsecured debt, will allow us to satisfy our debt and other obligations, as described above, upon maturity, if not before.
We have investments in several real estate joint ventures with various partners who are generally considered to be financially stable. Most of our joint ventures are financed with non-recourse debt. We believe that property level cash flows along with unfunded committed indebtedness and proceeds from the refinancing of outstanding secured indebtedness will be sufficient to fund the capital needs of our joint venture properties.
Cash Flows
The following summary discussion of our cash flows is based on our consolidated statements of cash flows in "Item 1. Financial Statements" and is not meant to be an all-inclusive discussion of the changes in our cash flows for the years presented below.
Cash, restricted cash, and cash equivalents were $335.5 million and $384.1 million as of December 31, 2023 and 2022, respectively, representing a decrease of $48.6 million. The decrease was a result of the following changes in cash flows (in thousands):

| Year Ended December 31,
| 2023 |  | 2022 |  | (Decrease) Increase
Net cash provided by operating activities | $ | 229,503 |  |  | $ | 276,088 |  |  | $ | (46,585) |
Net cash provided by investing activities | $ | 171,345 |  |  | $ | 425,805 |  |  | $ | (254,460) |
Net cash used in financing activities | $ | (449,383) |  |  | $ | (654,823) |  |  | $ | 205,440 |

43

Table of Contents
Our principal sources of operating cash flow are the properties in our consolidated and joint venture portfolios and our debt and preferred equity portfolio. These sources generate a relatively consistent stream of cash flow that provides us with resources to pay operating expenses, debt service, and fund dividend and distribution requirements.
Cash is used in investing activities to fund acquisitions, development or redevelopment projects and recurring and nonrecurring capital expenditures. We selectively invest in new projects that enable us to take advantage of our development, leasing, financing and property management skills, and invest in existing buildings that meet our investment criteria. During the year ended December 31, 2023, when compared to the year ended December 31, 2022, we used cash primarily for the following investing activities (in thousands):

Acquisitions of real estate | $ | 64,491 |
Capital expenditures and capitalized interest | 41,107 |
Joint venture investments | 37 |
Distributions from joint ventures | (1,173) |
Proceeds from disposition of real estate/joint venture interest | (68,753) |
Cash and restricted cash assumed from acquisition of real estate investment | (60,494) |
Debt and preferred equity and other investments | (229,675) |
Decrease in net cash provided by investing activities | $ | (254,460) |

Funds spent on capital expenditures, which are comprised of building and tenant improvements, decreased from $300.8 million for the year ended December 31, 2022 to $259.7 million for the year ended December 31, 2023 due to lower costs incurred in connection with our development and redevelopment properties.
We generally fund our investment activity through the sale of real estate, the sale of debt and preferred equity investments, property-level financing, our credit facilities, senior unsecured notes, and construction loans. From time to time, the Company may issue common or preferred stock, or the Operating Partnership may issue common or preferred units of limited partnership interest. During the year ended December 31, 2023, when compared to the year ended December 31, 2022, we used cash for the following financing activities (in thousands):

Proceeds from our debt obligations | $ | (1,367,980) |
Repayments of our debt obligations | 1,302,538 |
Net distribution to noncontrolling interests | (41,817) |
Other financing activities | 94,213 |
Repurchase of common stock | 151,197 |
Redemption of preferred stock | 6,267 |
Acquisition of subsidiary interest from noncontrolling interest | 29,817 |
Dividends and distributions paid | 31,205 |
Increase in net cash used in financing activities | $ | 205,440 |

Capitalization
Our authorized capital stock consists of 260,000,000 shares, $0.01 par value per share, consisting of 160,000,000 shares of common stock, $0.01 par value per share, 75,000,000 shares of excess stock, at $0.01 par value per share, and 25,000,000 shares of preferred stock, $0.01 par value per share. As of December 31, 2023, 64,726,253 shares of common stock and no shares of excess stock were issued and outstanding.
Share Repurchase Program
In August 2016, our Board of Directors approved a $1.0 billion share repurchase program under which we could buy shares of our common stock. The Board of Directors has since authorized five separate $500.0 million increases to the size of the share repurchase program in the fourth quarter of 2017, second quarter of 2018, fourth quarter of 2018, fourth quarter of 2019, and fourth quarter of 2020 bringing the total program size to $3.5 billion.
44

Table of Contents
The following table summarizes share repurchases executed under the program, excluding the redemption of OP units, for the years ended December 31, 2023, 2022 and 2021 as follows:

Period |  | Shares repurchased |  | Average price paid per share |  | Cumulative number of shares repurchased as part of the repurchase plan or programs
Year ended 2021 |  | 4,474,649 |  | $75.44 |  | 34,136,627
Year ended 2022 |  | 1,971,092 |  | $76.69 |  | 36,107,719
Year ended 2023 |  | — |  | $— |  | 36,107,719

Dividend Reinvestment and Stock Purchase Plan ("DRSPP")
In February 2021 the Company filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRSPP, which automatically became effective upon filing. The Company registered 3,500,000 shares of our common stock under the DRSPP. The DRSPP commenced on September 24, 2001.
The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the years ended December 31, 2023, 2022, and 2021, respectively (dollars in thousands):

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Shares of common stock issued | 17,180 |  |  | 10,839 |  |  | 10,387 |
Dividend reinvestments/stock purchases under the DRSPP | $ | 525 |  |  | $ | 525 |  |  | $ | 738 |

Fifth Amended and Restated 2005 Stock Option and Incentive Plan
The Fifth Amended and Restated 2005 Stock Option and Incentive Plan, or the 2005 Plan, was approved by the Company's Board of Directors in April 2022 and its stockholders in June 2022 at the Company's annual meeting of stockholders. Subject to adjustments upon certain corporate transactions or events, awards with respect to up to a maximum of 32,210,000 fungible units may be granted as options, restricted stock, phantom shares, dividend equivalent rights and other equity-based awards under the 2005 Plan. As of December 31, 2023, 3.9 million fungible units were available for issuance under the 2005 Plan after reserving for shares underlying outstanding restricted stock units and phantom stock units granted pursuant to our Non-Employee Directors' Deferral Program and LTIP Units.
Deferred Compensation Plan for Directors
Under our Non-Employee Director's Deferral Program, which commenced July 2004, the Company's non-employee directors may elect to defer up to 100% of their annual retainer fee, chairman fees, meeting fees and annual stock grant. Unless otherwise elected by a participant, fees deferred under the program shall be credited in the form of phantom stock units. The program provides that a director's phantom stock units generally will be settled in an equal number of shares of common stock upon the earlier of (i) the January 1 coincident with or the next following such director's termination of service from the Board of Directors or (ii) a change in control by us, as defined by the program. Phantom stock units are credited to each non-employee director quarterly using the closing price of our common stock on the first business day of the respective quarter. Each participating non-employee director is also credited with dividend equivalents or phantom stock units based on the dividend rate for each quarter, which are either paid in cash currently or credited to the director’s account as additional phantom stock units.
During the year ended December 31, 2023, 39,302 phantom stock units and 27,739 shares of common stock were issued to our Board of Directors. We recorded compensation expense of $2.7 million during the year ended December 31, 2023 related to the Deferred Compensation Plan. As of December 31, 2023, there were 230,295 phantom stock units outstanding pursuant to our Non-Employee Director's Deferral Program.
45

Table of Contents
Employee Stock Purchase Plan
In 2007, the Company's Board of Directors adopted the 2008 Employee Stock Purchase Plan, or ESPP, to provide equity-based incentives to eligible employees. The ESPP is intended to qualify as an "employee stock purchase plan" under Section 423 of the Code, and has been adopted by the board to enable our eligible employees to purchase the Company's shares of common stock through payroll deductions. The ESPP became effective on January 1, 2008 with a maximum of 500,000 shares of the common stock available for issuance, subject to adjustment upon a merger, reorganization, stock split or other similar corporate change. The Company filed a registration statement on Form S-8 with the SEC with respect to the ESPP. The common stock is offered for purchase through a series of successive offering periods. Each offering period will be three months in duration and will begin on the first day of each calendar quarter, with the first offering period having commenced on January 1, 2008. The ESPP provides for eligible employees to purchase the common stock at a purchase price equal to 85% of the lesser of (1) the market value of the common stock on the first day of the offering period or (2) the market value of the common stock on the last day of the offering period. The ESPP was approved by our stockholders at our 2008 annual meeting of stockholders. As of December 31, 2023, 224,159 shares of our common stock had been issued under the ESPP.
Indebtedness
The table below summarizes our consolidated mortgages and other loans payable, 2021 credit facility, 2022 term loan, senior unsecured notes and trust preferred securities outstanding as of December 31, 2023 and 2022, (amounts in thousands).

Debt Summary: | December 31, 2023 |  | December 31, 2022
Balance |  |  |
Fixed rate | $ | 1,117,386 |  | $ | 2,695,814
Variable rate—hedged | 2,120,000 |  | 2,320,000
Total fixed rate | 3,237,386 |  | 5,015,814
Total variable rate | 270,000 |  | 520,148
Total debt | $ | 3,507,386 |  | $ | 5,535,962
Debt, preferred equity, and other investments subject to variable rate | 168,745 |  | 144,056
Net exposure to variable rate debt | 101,255 |  | 376,092
Percent of Total Debt: |  |  |
Fixed rate | 92.3 | % |  | 90.6 | %
Variable rate (1) | 7.7 | % |  | 9.4 | %
Total | 100.0 | % |  | 100.0 | %
Effective Interest Rate for the Year: |  |  |
Fixed rate | 4.68 | % |  | 3.60 | %
Variable rate | 6.11 | % |  | 3.23 | %
Effective interest rate | 4.71 | % |  | 3.55 | %

(1) Inclusive of the mitigating effect of our debt, preferred equity, and other investments subject to variable rates, the percent of total debt of our net exposure to variable rate debt was 3.0% and 7.0% as of December 31, 2023 and December 31, 2022, respectively.
The variable rate debt shown above generally bears interest at an interest rate based on 30-day LIBOR (0.00% and 4.39% as of December 31, 2023 and 2022, respectively), and adjusted Term SOFR (5.35% and 4.30% as of December 31, 2023 and 2022, respectively). Our consolidated debt as of December 31, 2023 had a weighted average term to maturity of 2.69 years.
Certain of our debt and equity investments and other investments, with carrying values of $168.7 million as of December 31, 2023 and $144.1 million as of December 31, 2022, are variable rate investments, which mitigate our exposure to interest rate changes on our unhedged variable rate debt. Inclusive of the mitigating effect of these investments, the net ratio of our variable rate debt to total debt was 3.0% and 7.0% as of December 31, 2023 and 2022, respectively.
Mortgage Financing
As of December 31, 2023, our total mortgage debt (excluding our share of joint venture mortgage debt of $7.4 billion) consisted of $1.4 billion of fixed rate debt, including swapped variable rate debt, with an effective weighted average interest rate of 4.84% and $0.1 billion of variable rate debt with an effective weighted average interest rate of 6.05%.
46

Table of Contents
Corporate Indebtedness
2021 Credit Facility
In December 2021, we entered into an amended and restated credit facility, referred to as the 2021 credit facility, that was previously amended by the Company in November 2017, and was originally entered into by the Company in November 2012. As of December 31, 2023, the 2021 credit facility consisted of a $1.25 billion revolving credit facility, a $1.05 billion term loan (or "Term Loan A"), and a $200.0 million term loan (or "Term Loan B") with maturity dates of May 15, 2026, May 15, 2027, and November 21, 2024, respectively. The revolving credit facility has two six-month as-of-right extension options to May 15, 2027. We also have an option, subject to customary conditions, to increase the capacity of the credit facility to $4.5 billion at any time prior to the maturity dates for the revolving credit facility and term loans without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions.
As of December 31, 2023, the 2021 credit facility bore interest at a spread over adjusted Term SOFR plus 10 basis points with an interest period of one or three months, as we may elect, ranging from (i) 72.5 basis points to 140 basis points for loans under the revolving credit facility, (ii) 80 basis points to 160 basis points for loans under Term Loan A, and (iii) 85 basis points to 165 basis points for loans under Term Loan B, in each case based on the credit rating assigned to the senior unsecured long term indebtedness of the Company. In instances where there are either only two ratings available or where there are more than two and the difference between them is one rating category, the applicable rating shall be the highest rating. In instances where there are more than two ratings and the difference between the highest and the lowest is two or more rating categories, then the applicable rating used is the average of the highest two, rounded down if the average is not a recognized category.
As of December 31, 2023, the applicable spread over adjusted Term SOFR plus 10 basis points for the 2021 credit facility was 140 basis points for the revolving credit facility, 160 basis points for Term Loan A, and 165 basis points for Term Loan B. We are required to pay quarterly in arrears a 12.5 to 30 basis point facility fee on the total commitments under the revolving credit facility based on the credit rating assigned to the senior unsecured long-term indebtedness of the Company. As of December 31, 2023, the facility fee was 30 basis points.
As of December 31, 2023, we had $2.0 million of outstanding letters of credit, $560.0 million drawn under the revolving credit facility and $1.25 billion outstanding under the term loan facilities, with total undrawn capacity of $688.0 million under the 2021 credit facility. As of December 31, 2023 and December 31, 2022, the revolving credit facility had a carrying value of $554.8 million and $443.2 million, respectively, net of deferred financing costs. As of December 31, 2023 and December 31, 2022, the term loan facilities had a carrying value of $1.2 billion and $1.2 billion, respectively, net of deferred financing costs.
The Company and the Operating Partnership are borrowers jointly and severally obligated under the 2021 credit facility.
The 2021 credit facility includes certain restrictions and covenants (see Restrictive Covenants below).
2022 Term Loan
In October 2022, we entered into a term loan agreement, referred to as the 2022 term loan. The 2022 term loan was repaid in full in September 2023. The 2022 term loan consisted of a $425.0 million term loan with a maturity date of October 6, 2023. The 2022 term loan had one six-month as-of-right extension option to April 6, 2024. We also had an option, subject to customary conditions, to increase the capacity of the 2022 term loan to $500.0 million on or before January 7, 2023 without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions. In January 2023, the 2022 term loan was increased by $25.0 million to $425.0 million.
The 2022 term loan bore interest at a spread over adjusted Term SOFR plus 0.001 basis points, ranging from 100 basis points to 180 basis points, in each case based on the credit rating assigned to the senior unsecured long-term indebtedness of the Company. In instances where there were either only two ratings available or where there was more than two and the difference between them was one rating category, the applicable rating was the highest rating. In instances where there were more than two ratings and the difference between the highest and the lowest were two or more rating categories, then the applicable rating used was the average of the highest two, rounded down if the average was not a recognized category. As of December 31, 2022, the 2022 term loan had a carrying value of $398.2 million, net of deferred financing costs.
47

Table of Contents
Senior Unsecured Notes
The following table sets forth our senior unsecured notes and other related disclosures as of December 31, 2023 and 2022, respectively, by scheduled maturity date (dollars in thousands):

|  | December 31, 2023 |  | December 31, 2022 |  |  |  |  |  |  |
Issuance |  | Unpaid Principal Balance |  | Accreted Balance |  | Accreted Balance |  |  | Interest Rate (1) |  | Initial Term (in Years) |  | Maturity Date
December 17, 2015 (2) |  | $ | 100,000 |  |  | $ | 100,000 |  |  | $ | 100,000 |  |  |  | 4.27 | % |  | 10 |  | December 2025
|  | $ | 100,000 |  |  | $ | 100,000 |  |  | $ | 100,000 |  |  |  |  |  |  |  |
Deferred financing costs, net |  | — |  |  | (205) |  |  | (308) |  |  |  |  |  |  |  |
|  | $ | 100,000 |  |  | $ | 99,795 |  |  | $ | 99,692 |  |  |  |  |  |  |  |

(1)Interest rate as of December 31, 2023.
(2)Issued by the Company and the Operating Partnership as co-obligors.
Restrictive Covenants
The terms of the 2021 credit facility and our senior unsecured notes include certain restrictions and covenants which may limit, among other things, our ability to pay dividends, make certain types of investments, incur additional indebtedness, incur liens and enter into negative pledge agreements and dispose of assets, and which require compliance with financial ratios relating to the maximum ratio of total indebtedness to total asset value, a minimum ratio of EBITDA to fixed charges, a maximum ratio of secured indebtedness to total asset value and a maximum ratio of unsecured indebtedness to unencumbered asset value. The dividend restriction referred to above provides that, we will not during any time when a default is continuing, make distributions with respect to common stock or other equity interests, except to enable the Company to continue to qualify as a REIT for Federal income tax purposes. As of December 31, 2023 and 2022, we were in compliance with all such covenants.
Junior Subordinated Deferrable Interest Debentures
In June 2005, the Company and the Operating Partnership issued $100.0 million in unsecured trust preferred securities through a newly formed trust, SL Green Capital Trust I, or the Trust, which is a wholly-owned subsidiary of the Operating Partnership. The securities mature in 2035 and bear interest at a floating rate of 26 basis points over the three-month Term SOFR. Interest payments may be deferred for a period of up to eight consecutive quarters if the Operating Partnership exercises its right to defer such payments. The Trust preferred securities are redeemable at the option of the Operating Partnership, in whole or in part, with no prepayment premium. We do not consolidate the Trust even though it is a variable interest entity as we are not the primary beneficiary. Because the Trust is not consolidated, we have recorded the debt on our consolidated balance sheets and the related payments are classified as interest expense.
Interest Rate Risk
We are exposed to changes in interest rates primarily from our variable rate debt. Our exposure to interest rate fluctuations are managed through either the use of interest rate derivative instruments and/or through our variable rate debt and preferred equity investments. Based on the debt outstanding as of December 31, 2023, a hypothetical 100 basis point increase in the floating rate interest rate curve would increase our consolidated annual interest cost, net of interest income from variable rate debt and preferred equity investments, by $1.0 million and would increase our share of joint venture annual interest cost by $12.2 million. As of December 31, 2023, $168.7 million, or 90.5%, of our $346.7 million debt and preferred equity portfolio was indexed to SOFR.
We recognize most derivatives on the balance sheet at fair value. Derivatives that are not hedges are adjusted to fair value through income. If a derivative is considered a hedge, depending on the nature of the hedge, changes in the fair value of the derivative will either be offset against the change in fair value of the hedged asset, liability, or firm commitment through earnings, or recognized in other comprehensive income (loss) until the hedged item is recognized in earnings.
Our consolidated long-term debt of $3.2 billion bears interest at fixed rates, and therefore the fair value of these instruments is affected by changes in the market interest rates. Our variable rate debt and variable rate joint venture debt as of December 31, 2023 bore interest based on a spread to LIBOR of 145 basis points and Term SOFR of 50 basis points to 565 basis points.
48

Table of Contents
Off-Balance Sheet Arrangements
We have off-balance sheet investments, including joint ventures and debt and preferred equity investments. These investments all have varying ownership structures. A majority of our joint venture arrangements are accounted for under the equity method of accounting as we have the ability to exercise significant influence, but not control, over the operating and financial decisions of these joint venture arrangements. Our off-balance sheet arrangements are discussed in Note 5, "Debt and Preferred Equity Investments" and Note 6, "Investments in Unconsolidated Joint Ventures" in the accompanying consolidated financial statements.
Dividends/Distributions
We expect to pay dividends to our stockholders based on the distributions we receive from our Operating Partnership.
To maintain our qualification as a REIT, we must pay annual dividends to our stockholders of at least 90% of our REIT taxable income, determined before taking into consideration the dividends paid deduction and net capital gains.
Any dividend we pay may be in the form of cash, stock, or a combination thereof, subject to IRS limitations on the use of stock for dividends. Additionally, if our REIT taxable income in a particular year exceeds the amount of cash dividends we pay in that year, we may pay stock dividends in order to maintain our REIT status and avoid certain REIT-level taxes.
Before we pay any cash dividend, whether for Federal income tax purposes or otherwise, which would only be paid out of available cash to the extent permitted under the 2021 credit facility and senior unsecured notes, we must first meet both our operating requirements and scheduled debt service on our mortgages and loans payable.
Related Party Transactions
Cleaning/ Security/ Messenger and Restoration Services
Prior to 2023, Alliance Building Services, or Alliance, and its affiliates, which provide services to certain properties owned by us, were previously partially owned by Gary Green, a son of Stephen L. Green, who serves as a member and as the chairman emeritus of our Board of Directors. Alliance’s affiliates include First Quality Maintenance, L.P., or First Quality, Classic Security LLC, Bright Star Couriers LLC and Onyx Restoration Works, and provide cleaning, extermination, security, messenger, and restoration services, respectively. In addition, First Quality has the non-exclusive opportunity to provide cleaning and related services to individual tenants at our properties on a basis separately negotiated with any tenant seeking such additional services. The Service Corporation has entered into an arrangement with Alliance whereby it will receive a profit participation above a certain threshold for services provided by Alliance to certain tenants at certain buildings above the base services specified in their lease agreements.
Income earned from the profit participation prior to 2023, which is included in Other income on the consolidated statements of operations, was $1.4 million and $1.7 million for the years ended December 31, 2022 and 2021, respectively. We also recorded expenses, inclusive of capitalized expenses, of $8.6 million and $14.0 million for these services (excluding services provided directly to tenants) for the years ended December 31, 2022 and 2021, respectively.
One Vanderbilt Avenue Investment
Our Chairman and CEO, Marc Holliday, and our former President, Andrew Mathias, made investments in our One Vanderbilt project (inclusive of the property and SUMMIT One Vanderbilt), which entitles Mr. Holliday and Mr. Mathias to receive approximately 1.27% and 0.85%, respectively, on account of the property and 1.92% and 1.28%, respectively, on account of SUMMIT One Vanderbilt, of any profits realized by the Company from its One Vanderbilt project in excess of the Company's capital contributions. Mr. Holliday and Mr. Mathias paid $1.4 million and $1.0 million, respectively, which equaled the fair market value of the interests acquired as of the date the investment agreements were entered into as determined by an independent third party appraisal that we obtained.
Messrs. Holliday and Mathias have the right to tender their interests in the project upon stabilization (50% within three years after stabilization and 100% three years or more after stabilization). In addition, the agreement calls for us to repurchase these interests in the event of a sale of One Vanderbilt or a transactional change of control of the Company. We also have the right to repurchase these interests on the 7-year anniversary of the stabilization of the project or upon the occurrence of certain separation events prior to the stabilization of the project relating to each of Messrs. Holliday’s and Mathias’s continued service with us. The price paid upon a tender of the interests will equal the liquidation value of the interests at the time, with the value being based on the project's sale price, if applicable, or fair market value as determined by an independent third party appraiser. In 2022, stabilization of the property (but not SUMMIT One Vanderbilt) was achieved. Therefore, Messrs. Holiday and Mathias exercised their rights to tender 50% of their interests in the property (but not SUMMIT One Vanderbilt) for liquidation values of $17.9 million and $11.9 million, respectively, which were paid in July 2022.
49

Table of Contents
One Vanderbilt Avenue Leases
In November 2018, we entered into a lease agreement with the One Vanderbilt Avenue joint venture covering certain floors at the property. In March 2021, the lease commenced and we relocated our corporate headquarters to the leased space. For the year ended December 31, 2023 and 2022 we recorded $3.0 million and $3.0 million, respectively, of rent expense under the lease. Additionally, in June 2021, we, through a consolidated subsidiary, entered into a lease agreement with the One Vanderbilt Avenue joint venture for SUMMIT One Vanderbilt, which commenced operations in October 2021. For the year ended December 31, 2023, we recorded $38.9 million of rent expense under the lease, including percentage rent, of which $26.2 million was recognized as income as a component of Equity in net loss from unconsolidated joint ventures in our consolidated statements of operations. For the year ended December 31, 2022, we recorded $33.0 million of rent expense under the lease, including percentage rent, of which $22.8 million was recognized as income as a component of Equity in net loss from unconsolidated joint ventures in our consolidated statements of operations. See Note 20, "Commitments and Contingencies."
Insurance
We maintain “all-risk” property and rental value coverage (including coverage regarding the perils of flood, earthquake and terrorism, excluding nuclear, biological, chemical, and radiological terrorism ("NBCR")), within two property insurance programs and liability insurance. Separate property and liability coverage may be purchased on a stand-alone basis for certain assets, such as development projects. Additionally, one of our captive insurance companies, Belmont Insurance Company, or Belmont, provides coverage for NBCR terrorist acts above a specified trigger. Belmont's retention is reinsured by our other captive insurance company, Ticonderoga Insurance Company ("Ticonderoga"). If Belmont or Ticonderoga are required to pay a claim under our insurance policies, we would ultimately record the loss to the extent of required payments. However, there is no assurance that in the future we will be able to procure coverage at a reasonable cost. Further, if we experience losses that are uninsured or that exceed policy limits, we could lose the capital invested in the damaged properties as well as the anticipated future cash flows from those properties. Additionally, our debt instruments contain customary covenants requiring us to maintain insurance and we could default under our debt instruments if the cost and/or availability of certain types of insurance make it impractical or impossible to comply with such covenants relating to insurance. Belmont and Ticonderoga provide coverage solely on properties owned by the Company or its affiliates.
Furthermore, with respect to certain of our properties, including properties held by joint ventures or subject to triple net leases, insurance coverage is obtained by a third-party and we do not control the coverage. While we may have agreements with such third parties to maintain adequate coverage and we monitor these policies, such coverage ultimately may not be maintained or adequately cover our risk of loss.
Funds from Operations
FFO is a widely recognized non-GAAP financial measure of REIT performance. The Company computes FFO in accordance with standards established by NAREIT, which may not be comparable to FFO reported by other REITs that do not compute FFO in accordance with the NAREIT definition, or that interpret the NAREIT definition differently than the Company does. The revised White Paper on FFO approved by the Board of Governors of NAREIT in April 2002, and subsequently amended in December 2018, defines FFO as net income (loss) (computed in accordance with GAAP), excluding gains (or losses) from sales of properties and real estate related impairment charges, plus real estate related depreciation and amortization and after adjustments for unconsolidated partnerships and joint ventures.
The Company presents FFO because it considers it an important supplemental measure of the Company’s operating performance and believes that it is frequently used by securities analysts, investors and other interested parties in the evaluation of REITs, particularly those that own and operate commercial office properties. The Company also uses FFO as one of several criteria to determine performance-based compensation for members of its senior management. FFO is intended to exclude GAAP historical cost depreciation and amortization of real estate and related assets, which assumes that the value of real estate assets diminishes ratably over time. Historically, however, real estate values have risen or fallen with market conditions. Because FFO excludes depreciation and amortization unique to real estate, gains and losses from property dispositions, and real estate related impairment charges, it provides a performance measure that, when compared year over year, reflects the impact to operations from trends in occupancy rates, rental rates, operating costs, and interest costs, providing perspective not immediately apparent from net income. FFO does not represent cash generated from operating activities in accordance with GAAP and should not be considered as an alternative to net income (determined in accordance with GAAP), as an indication of the Company’s financial performance or to cash flow from operating activities (determined in accordance with GAAP) as a measure of the Company’s liquidity, nor is it indicative of funds available to fund the Company’s cash needs, including our ability to make cash distributions.
50

Table of Contents
FFO for the years ended December 31, 2023, 2022, and 2021 are as follows (in thousands):

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Net (loss) income attributable to SL Green common stockholders | $ | (579,509) |  |  | $ | (93,024) |  |  | $ | 434,804 |
Add: |  |  |  |  |
Depreciation and amortization | 247,810 |  |  | 216,167 |  |  | 216,969 |
Joint venture depreciation and noncontrolling interest adjustments | 284,284 |  |  | 252,893 |  |  | 249,087 |
Net (loss) income attributable to noncontrolling interests | (42,033) |  |  | (4,672) |  |  | 23,573 |
Less: |  |  |  |  |
Equity in net loss on sale of interest in unconsolidated joint venture/real estate | (13,368) |  |  | (131) |  |  | (32,757) |
Purchase price and other fair value adjustments | (6,813) |  |  | — |  |  | 209,443 |
(Loss) gain on sale of real estate, net | (32,370) |  |  | (84,485) |  |  | 287,417 |
Depreciable real estate reserves and impairments | (382,374) |  |  | (6,313) |  |  | (23,794) |
Depreciation on non-rental real estate assets | 4,136 |  |  | 3,466 |  |  | 2,890 |
Funds from Operations attributable to SL Green common stockholders and unit holders | $ | 341,341 |  |  | $ | 458,827 |  |  | $ | 481,234 |
Cash flows provided by operating activities | $ | 229,503 |  |  | $ | 276,088 |  |  | $ | 255,979 |
Cash flows provided by investing activities | $ | 171,345 |  |  | $ | 425,805 |  |  | $ | 993,581 |
Cash flows used in financing activities | $ | (449,383) |  |  | $ | (654,823) |  |  | $ | (1,285,371) |

Seasonality
Our business at SUMMIT is subject to tourism trends and weather conditions, resulting in seasonal fluctuation. In 2023 and 2022, approximately 14.0% to 16.0% of our annual SUMMIT revenue was realized in the first quarter, 24.0% to 26.0% was realized in the second quarter, 28.0% to 30.0% was realized in the third quarter, and 29.0% to 31.0% was realized in the fourth quarter. We do not consider any other components of our business to be subject to material seasonal fluctuations.
Climate Change
With our roots in New York City, we are at the center of one of the world's most ambitious climate legislative environments. Through the Climate Leadership and Community Protection Act signed into law in 2019, New York State mandated the adoption of a net-zero carbon economy statewide by 2050, with a zero-carbon electricity grid by 2040. New York City enacted Local Law 97 (LL97) in 2019 under the Climate Mobilization Act, setting carbon caps for large buildings starting in 2024 as part of a broader commitment to reducing greenhouse gas emissions by 40% by 2030, and by 80% by 2050. As our portfolio is principally located in Manhattan, these policy elements represent the most material sources of transition risks relevant to our business. We do not anticipate any material financial impact on our portfolio in the first compliance period of 2024 to 2029.
While SL Green's portfolio has not been substantially affected by climate-related events to New York City real estate, such as Hurricane Sandy in 2012, we have continued to develop our approach to physical climate risk assessment, management, and mitigation in order to manage and minimize the impacts of future events. We have conducted climate-related scenario analyses as part of our first Task Force on Climate-related Financial Disclosures ("TCFD") report published in 2021 and 2023, which we made available on our website. The Company has committed to near-term Scope 1 and Scope 2 science-based emissions reduction targets with the SBTi, which were approved in early 2023. Our goal is to reduce emissions for our operationally controlled portfolio to align it with the 1.5 degree Celsius climate scenario.
We consider the successful management and mitigation of climate-related risks across our portfolio as an opportunity to raise the financial value of our buildings and pass on these benefits to our stakeholders, tenants, and investors. We believe our investments over the last 20 years in energy efficiency improvements and greenhouse gas emissions reductions have minimized the impact of climate legislation on our portfolio and our active development pipeline sets the standard for sustainable new construction and responsible community engagement. We leverage years of operational excellence to incorporate innovative design and technological solutions. We also utilize recommendations from our portfolio-wide New York State Energy Research and Development Authority ("NYSERDA") emissions reduction study to help lower emissions from tenant spaces and base building operations. Together, these measures are expected to minimize our vulnerability to the physical risks of climate change, as well as transition risks covering policy and legal, market, technology, and reputational factors.
51

Table of Contents
Accounting Standards Updates
The Accounting Standards Updates are discussed in Note 2, "Significant Accounting Policies - Accounting Standards Updates" in the accompanying consolidated financial statements.
Forward-Looking Information
This report includes certain statements that may be deemed to be "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 and are intended to be covered by the safe harbor provisions thereof. All statements, other than statements of historical facts, included in this report that address activities, events or developments that we expect, believe or anticipate will or may occur in the future, including such matters as future capital expenditures, dividends and acquisitions (including the amount and nature thereof), development trends of the real estate industry and the New York metropolitan area markets, business strategies, expansion and growth of our operations and other similar matters, are forward-looking statements. These forward-looking statements are based on certain assumptions and analyses made by us in light of our experience and our perception of historical trends, current conditions, expected future developments and other factors we believe are appropriate.
Forward-looking statements are not guarantees of future performance and actual results or developments may differ materially, and we caution you not to place undue reliance on such statements. Forward-looking statements are generally identifiable by the use of the words "may," "will," "should," "expect," "anticipate," "estimate," "believe," "intend," "project," "continue," or the negative of these words, or other similar words or terms.
Forward-looking statements contained in this report are subject to a number of risks and uncertainties that may cause our actual results, performance or achievements to be materially different from future results, performance or achievements expressed or implied by forward-looking statements made by us. These risks and uncertainties include:
•the effect of general economic, business and financial conditions, and their effect on the New York City real estate market in particular;
•dependence upon the New York City real estate market;
•risks of real estate acquisitions, dispositions, development and redevelopment, including the cost of construction delays and cost overruns;
•risks relating to debt and preferred equity investments;
•availability and creditworthiness of prospective tenants and borrowers;
•bankruptcy or insolvency of a major tenant or a significant number of smaller tenants or borrowers;
•adverse changes in the real estate markets, including reduced demand for office space, increasing vacancy, and increasing availability of sublease space;
•availability of debt and equity capital for our operational needs and investment strategy;
•unanticipated increases in financing and other costs, including a rise in interest rates;
•our ability to comply with financial covenants in our debt instruments;
•our ability to maintain our status as a REIT;
•risks of investing through joint venture structures, including the fulfillment by our partners of their financial obligations;
•the threat of terrorist attacks;
•our ability to obtain adequate insurance coverage at a reasonable cost and the potential for losses in excess of our insurance coverage, including as a result of environmental contamination; and
•legislative, regulatory and/or safety requirements adversely affecting REITs and the real estate business including costs of compliance with the Americans with Disabilities Act, the Fair Housing Act and other similar laws and regulations.
Other factors and risks to our business, many of which are beyond our control, are described in other sections of this report and in our other filings with the SEC. Except to the extent required by law, we undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of future events, new information or otherwise.
52

Table of Contents
ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK
See Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations—Market Rate Risk" for additional information regarding our exposure to interest rate fluctuations.
The table below presents the principal cash flows based upon maturity dates of our debt obligations and debt and preferred equity investments and the weighted-average interest rates by expected maturity dates, including as-of-right extension options, as of December 31, 2023 (in thousands):

| Long-Term Debt |  | Debt and Preferred Equity Investments (1) |
| Fixed Rate |  | Average Interest Rate |  | Variable Rate |  | Average Interest Rate |  | Amount |  | Weighted Yield |
2024 | $ | 477,238 |  |  | 4.98 | % |  | $ | 110,000 |  |  | 6.03 | % |  | $ | 120,422 |  |  | 9.07 | % |
2025 | 470,000 |  |  | 4.82 | % |  | — |  |  | 4.57 | % |  | 30,000 |  |  | 8.52 | % |
2026 | 190,148 |  |  | 4.72 | % |  | — |  |  | 4.57 | % |  | 48,323 |  |  | 10.46 | % |
2027 | 2,000,000 |  |  | 4.74 | % |  | 160,000 |  |  | 4.55 | % |  | 128,000 |  |  | 6.55 | % |
2028 | — |  |  | 4.75 | % |  | — |  |  | — | % |  | — |  |  | — | % |
Thereafter | 100,000 |  |  | 4.92 | % |  | — |  |  | — | % |  | 20,000 |  |  | 8.11 | % |
Total | $ | 3,237,386 |  |  | 4.84 | % |  | $ | 270,000 |  |  | 5.19 | % |  | $ | 346,745 |  |  | 8.23 | % |
Fair Value | $ | 3,184,338 |  |  |  |  | $ | 268,787 |  |  |  |  |  |  |  |

(1)Our debt and preferred equity investments had an estimated fair value of approximately $0.3 billion as of December 31, 2023.
The table below presents the principal cash flows based upon maturity dates of our share of our joint venture debt obligations and the weighted-average interest rates by expected maturity dates, including as-of-right extension options, as of December 31, 2023 (in thousands):

| Long Term Debt
| Fixed Rate |  | Average Interest Rate |  | Variable Rate |  | Average Interest Rate
2024 | $ | 524,511 |  |  | 4.12 | % |  | $ | 1,298,467 |  |  | 8.10 | %
2025 | 1,670,861 |  |  | 3.98 | % |  | — |  |  | — | %
2026 | 542,968 |  |  | 3.60 | % |  | — |  |  | — | %
2027 | 1,185,168 |  |  | 3.32 | % |  | — |  |  | — | %
2028 | — |  |  | 2.86 | % |  | — |  |  | — | %
Thereafter | 2,130,300 |  |  | 2.86 | % |  | — |  |  | — | %
Total | $ | 6,053,808 |  |  | 3.76 | % |  | $ | 1,298,467 |  |  | 8.10 | %
Fair Value | $ | 5,387,516 |  |  |  |  | $ | 1,292,853 |  |  |

53

Table of Contents
The table below lists our consolidated derivative instruments, which are hedging variable rate debt, and their related fair values as of December 31, 2023 (in thousands):

| Asset Hedged |  | Benchmark Rate |  | Notional Value |  | Strike Rate |  | Effective Date |  | Expiration Date |  | Fair Value
Interest Rate Swap | Credit Facility |  | SOFR |  | $ | 150,000 |  |  | 2.600 | % |  | December 2021 |  | January 2024 |  | $ | 11 |
Interest Rate Swap | Credit Facility |  | SOFR |  | 200,000 |  |  | 4.490 | % |  | November 2022 |  | January 2024 |  | 5 |
Interest Rate Swap | Credit Facility |  | SOFR |  | 200,000 |  |  | 4.411 | % |  | November 2022 |  | January 2024 |  | 5 |
Interest Rate Cap | Mortgage |  | SOFR |  | 370,000 |  |  | 3.250 | % |  | June 2023 |  | June 2024 |  | 3,158 |
Interest Rate Cap | Credit Facility |  | SOFR |  | 370,000 |  |  | 3.250 | % |  | June 2023 |  | June 2024 |  | (3,145) |
Interest Rate Swap | Credit Facility |  | SOFR |  | 150,000 |  |  | 2.621 | % |  | December 2021 |  | January 2026 |  | 4,011 |
Interest Rate Swap | Credit Facility |  | SOFR |  | 200,000 |  |  | 2.662 | % |  | December 2021 |  | January 2026 |  | 5,196 |
Interest Rate Swap | Credit Facility |  | SOFR |  | 100,000 |  |  | 2.903 | % |  | February 2023 |  | February 2027 |  | 2,281 |
Interest Rate Swap | Credit Facility |  | SOFR |  | 100,000 |  |  | 2.733 | % |  | February 2023 |  | February 2027 |  | 2,775 |
Interest Rate Swap | Credit Facility |  | SOFR |  | 50,000 |  |  | 2.463 | % |  | February 2023 |  | February 2027 |  | 1,781 |
Interest Rate Swap | Credit Facility |  | SOFR |  | 200,000 |  |  | 2.591 | % |  | February 2023 |  | February 2027 |  | 6,378 |
Interest Rate Swap | Credit Facility |  | SOFR |  | 300,000 |  |  | 2.866 | % |  | July 2023 |  | May 2027 |  | 7,306 |
Interest Rate Swap | Credit Facility |  | SOFR |  | 150,000 |  |  | 3.524 | % |  | January 2024 |  | May 2027 |  | 549 |
Interest Rate Swap | Credit Facility |  | SOFR |  | 370,000 |  |  | 3.888 | % |  | November 2022 |  | June 2027 |  | (3,044) |
Interest Rate Swap | Credit Facility |  | SOFR |  | 300,000 |  |  | 4.487 | % |  | November 2024 |  | November 2027 |  | (10,273) |
Interest Rate Swap | Credit Facility |  | SOFR |  | 100,000 |  |  | 3.756 | % |  | January 2023 |  | January 2028 |  | (646) |
Total Consolidated Hedges |  |  |  |  |  |  |  |  |  |  |  |  | $ | 16,348 |

In addition to these derivative instruments, some of our joint venture loan agreements require the joint venture to purchase interest rate caps on its debt. All such interest rate caps represented an asset of $30.7 million in the aggregate as of December 31, 2023. We also swapped certain floating rate debt at some of our joint ventures. These swaps represented an asset of $12.3 million in the aggregate as of December 31, 2023.

| Asset Hedged |  | Benchmark Rate |  | Notional Value |  | Strike Rate |  | Effective Date |  | Expiration Date |  | Fair Value
Interest Rate Cap | Mortgage |  | SOFR |  | $ | 220,000 |  |  | 4.000 | % |  | February 2023 |  | February 2024 |  | $ | 318 |
Interest Rate Cap | Mortgage |  | SOFR |  | 484,069 |  |  | 0.490 | % |  | February 2022 |  | May 2024 |  | 8,331 |
Interest Rate Cap | Mortgage |  | SOFR |  | 484,069 |  |  | 0.490 | % |  | February 2022 |  | May 2024 |  | 8,330 |
Interest Rate Cap | Mortgage |  | SOFR |  | 505,412 |  |  | 3.000 | % |  | June 2023 |  | June 2024 |  | 4,948 |
Interest Rate Cap | Mortgage |  | SOFR |  | 272,000 |  |  | 4.000 | % |  | August 2023 |  | August 2024 |  | 1,675 |
Interest Rate Cap | Mortgage |  | SOFR |  | 477,783 |  |  | 3.500 | % |  | September 2023 |  | September 2024 |  | 5,213 |
Interest Rate Cap | Mortgage |  | SOFR |  | 278,161 |  |  | 4.000 | % |  | May 2024 |  | November 2024 |  | 948 |
Interest Rate Cap | Mortgage |  | SOFR |  | 278,161 |  |  | 4.000 | % |  | May 2024 |  | November 2024 |  | 948 |
Interest Rate Swap | Mortgage |  | SOFR |  | 250,000 |  |  | 3.608 | % |  | April 2023 |  | February 2026 |  | 1,819 |
Interest Rate Swap | Mortgage |  | SOFR |  | 250,000 |  |  | 3.608 | % |  | April 2023 |  | February 2026 |  | 1,818 |
Interest Rate Swap | Mortgage |  | SOFR |  | 177,000 |  |  | 1.555 | % |  | December 2022 |  | February 2026 |  | 8,686 |
Total Unconsolidated Hedges |  |  |  |  |  |  |  |  |  |  |  |  | $ | 43,034 |

54

Table of Contents
ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
Index to Financial Statements and Schedules

FINANCIAL STATEMENTS OF SL GREEN REALTY CORP. |
Report of Independent Registered Public Accounting Firm (PCAOB ID: 42) | 56
Consolidated Balance Sheets as of December 31, 2023 and 2022 | 59
Consolidated Statements of Operations for the years ended December 31, 2023, 2022 and 2021 | 61
Consolidated Statements of Comprehensive (Loss) Income for the years ended December 31, 2023, 2022 and 2021 | 62
Consolidated Statements of Equity for the years ended December 31, 2023, 2022 and 2021 | 63
Consolidated Statements of Cash Flows for the years ended December 31, 2023, 2022 and 2021 | 64
FINANCIAL STATEMENTS OF SL GREEN OPERATING PARTNERSHIP, L.P. |
Report of Independent Registered Public Accounting Firm (PCAOB ID: 42) | 67
Consolidated Balance Sheets as of December 31, 2023 and 2022 | 70
Consolidated Statements of Operations for the years ended December 31, 2023, 2022 and 2021 | 72
Consolidated Statements of Comprehensive (Loss) Income for the years ended December 31, 2023, 2022 and 2021 | 73
Consolidated Statements of Capital for the years ended December 31, 2023, 2022 and 2021 | 74
Consolidated Statements of Cash Flows for the years ended December 31, 2023, 2022 and 2021 | 75
Notes to Consolidated Financial Statements | 78
Schedules |
Schedule III- Real Estate and Accumulated Depreciation as of December 31, 2023 | 123
All other schedules are omitted because they are not required or the required information is shown in the financial statements or notes thereto. |

55

Table of Contents
Report of Independent Registered Public Accounting Firm
To the Shareholders and the Board of Directors of SL Green Realty Corp.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of SL Green Realty Corp. (the Company) as of December 31, 2023 and 2022, the related consolidated statements of operations, comprehensive (loss) income, equity and cash flows for each of the three years in the period ended December 31, 2023, and the related notes and financial statement schedule listed in the Index at Item 15(a)(2) (collectively referred to as the "consolidated financial statements"). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023, in conformity with U.S. generally accepted accounting principles.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 23, 2024 expressed an unqualified opinion thereon.
Basis for Opinion
These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
Critical Audit Matters
The critical audit matters communicated below are matters arising from the current period audit of the financial statements that were communicated or required to be communicated to the audit committee and that: (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Joint Venture Consolidation Assessment
Description of the Matter | The Company accounted for certain investments in real estate joint ventures under the equity method of accounting and consolidated certain other investments in real estate joint ventures. At December 31, 2023, the Company’s investments in unconsolidated joint ventures was $3.0 billion and noncontrolling interests in consolidated other partnerships was $69.6 million. As discussed in Note 2 to the consolidated financial statements, for each joint venture, the Company evaluated the rights provided to each party in the venture to assess the consolidation of the venture. |

56

Table of Contents

How We Addressed the Matter in Our Audit | Auditing management’s joint venture consolidation analyses was complex and highly judgmental due to the subjectivity in assessing which activities most significantly impact a joint venture’s economic performance based on the purpose and design of the entity over the duration of its expected life and assessing which party has rights to direct those activities. We tested the Company’s controls over the assessment of joint venture consolidation. For example, we tested controls over management's review of the consolidation analyses for newly formed ventures as well as controls over management's identification of reconsideration events which could trigger modified consolidation conclusions for existing ventures. To test the Company’s consolidation assessment for real estate joint ventures, our procedures included, among others, reviewing new and amended joint venture agreements and discussing with management the nature of the rights conveyed to the Company through the joint venture agreements as well as the business purpose of the joint venture transactions. We reviewed management’s assessment of the activities that would most significantly impact the joint venture’s economic performance and evaluated whether the joint venture agreements provided participating or protective rights to the Company. We also evaluated transactions with the joint ventures for events which would require a reconsideration of previous consolidation conclusions. |
Impairment of Commercial Real Estate Properties and Investments in Unconsolidated Joint Ventures
Description of the Matter | At December 31, 2023, the Company’s commercial real estate properties, at cost totaled approximately $5.0 billion. As described in Note 2 to the consolidated financial statements, real estate properties are periodically reviewed for impairment when circumstances indicate that the carrying value of a property may not be recoverable. For the year ended December 31, 2023, the Company recognized $249.5 million of impairment losses on its commercial real estate properties, which is included in depreciable real estate reserves and impairments in the consolidated statements of operations. At December 31, 2023, the Company’s investments in unconsolidated joint ventures was $3.0 billion. As described in Note 2 to the consolidated financial statements, investments in unconsolidated joint ventures are assessed for recoverability, and if it is determined that a loss in value of the investment is other than temporary, the investment is written down to its fair value. For the year ended December 31, 2023, the Company recognized $132.9 million of other than temporary impairment losses on its investments in unconsolidated joint ventures, which is included in depreciable real estate reserves and impairments in the consolidated statements of operations. |
How We Addressed the Matter in Our Audit | Auditing the Company’s accounting for impairment of commercial real estate properties and investments in unconsolidated joint ventures was especially challenging and involved a high degree of subjectivity as a result of the assumptions and estimates inherent in the determination of estimated future cash flows and the estimated fair value of commercial real estate properties and investments in unconsolidated joint ventures. In particular, management’s assumptions and estimates included estimated revenue and expense growth rates, discount rates and capitalization rates, which were sensitive to expectations about future operations, market or economic conditions, demand and competition. We obtained an understanding, evaluated the design, and tested the operating effectiveness of controls over the Company’s commercial real estate properties and investments in unconsolidated joint ventures impairment process. This included testing of controls over management's review of the significant assumptions and data inputs utilized in the estimation of expected future cash flows and the determination of fair value. To test the Company's accounting for impairment of commercial real estate properties and investments in unconsolidated joint ventures, we performed audit procedures that included, among others, evaluating the methodologies applied and testing the significant assumptions discussed above and the underlying data used by the Company in its impairment analyses. We held discussions with management about the current status of potential transactions and the Company’s intent and ability to fund future operations of investments in unconsolidated joint ventures. We also discussed management’s judgments to understand the probability of future events that could affect the holding period and other cash flow assumptions for the properties. In certain cases, we involved our valuation specialists to assist in performing these procedures. We compared the significant assumptions used by management to historical data and observable market-specific data. We also assessed management’s estimates and performed sensitivity analyses of significant assumptions to evaluate the changes in estimated future cash flows that would result from changes in the assumptions. In addition, we assessed information and events subsequent to the balance sheet date to corroborate certain of the key assumptions utilized by management. |

57

Table of Contents
/s/ Ernst & Young LLP
We have served as the Company‘s auditor since 1997.
New York, New York
February 23, 2024
58

Table of Contents
SL Green Realty Corp.
Consolidated Balance Sheets
(in thousands, except per share data)

| December 31, 2023 |  | December 31, 2022
Assets |  |  |
Commercial real estate properties, at cost: |  |  |
Land and land interests | $ | 1,092,671 |  |  | $ | 1,576,927 |
Building and improvements | 3,655,624 |  |  | 4,903,776 |
Building leasehold and improvements | 1,354,569 |  |  | 1,691,831 |
Right of use asset - operating leases | 953,236 |  |  | 1,026,265 |
| 7,056,100 |  |  | 9,198,799 |
Less: accumulated depreciation | (2,035,311) |  |  | (2,039,554) |
| 5,020,789 |  |  | 7,159,245 |
Cash and cash equivalents | 221,823 |  |  | 203,273 |
Restricted cash | 113,696 |  |  | 180,781 |
Investments in marketable securities | 9,591 |  |  | 11,240 |
Tenant and other receivables | 33,270 |  |  | 34,497 |
Related party receivables | 12,168 |  |  | 27,352 |
Deferred rents receivable | 264,653 |  |  | 257,887 |
Debt and preferred equity investments, net of discounts and deferred origination fees of $1,630 and $1,811 and allowances of $13,520 and $6,630 in 2023 and 2022, respectively | 346,745 |  |  | 623,280 |
Investments in unconsolidated joint ventures | 2,983,313 |  |  | 3,190,137 |
Deferred costs, net | 111,463 |  |  | 121,157 |
Other assets | 413,670 |  |  | 546,945 |
Total assets (1) | $ | 9,531,181 |  |  | $ | 12,355,794 |
Liabilities |  |  |
Mortgages and other loans payable, net | $ | 1,491,319 |  |  | $ | 3,227,563 |
Revolving credit facility, net | 554,752 |  |  | 443,217 |
Unsecured term loans, net | 1,244,881 |  |  | 1,641,552 |
Unsecured notes, net | 99,795 |  |  | 99,692 |
Accrued interest payable | 17,930 |  |  | 14,227 |
Other liabilities | 471,401 |  |  | 236,211 |
Accounts payable and accrued expenses | 153,164 |  |  | 154,867 |
Deferred revenue | 134,053 |  |  | 272,248 |
Lease liability - financing leases | 105,531 |  |  | 104,218 |
Lease liability - operating leases | 827,692 |  |  | 895,100 |
Dividend and distributions payable | 20,280 |  |  | 21,569 |
Security deposits | 49,906 |  |  | 50,472 |
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities | 100,000 |  |  | 100,000 |
Total liabilities (1) | 5,270,704 |  |  | 7,260,936 |
Commitments and contingencies |  |  |
Noncontrolling interests in Operating Partnership | 238,051 |  |  | 269,993 |
Preferred units | 166,501 |  |  | 177,943 |

59

Table of Contents
SL Green Realty Corp.
Consolidated Balance Sheets
(in thousands, except per share data)

| December 31, 2023 |  | December 31, 2022
Equity |  |  |
SL Green stockholders' equity: |  |  |
Series I Preferred Stock, $0.01 par value, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2023 and 2022 | 221,932 |  |  | 221,932 |
Common stock, $0.01 par value, 160,000 shares authorized and 65,786 and 65,440 issued and outstanding at December 31, 2023 and 2022, respectively (including 1,060 and 1,060 shares held in treasury at December 31, 2023 and 2022, respectively) | 660 |  |  | 656 |
Additional paid-in-capital | 3,826,452 |  |  | 3,790,358 |
Treasury stock at cost | (128,655) |  |  | (128,655) |
Accumulated other comprehensive income | 17,477 |  |  | 49,604 |
Retained (deficit) earnings | (151,551) |  |  | 651,138 |
Total SL Green stockholders' equity | 3,786,315 |  |  | 4,585,033 |
Noncontrolling interests in other partnerships | 69,610 |  |  | 61,889 |
Total equity | 3,855,925 |  |  | 4,646,922 |
Total liabilities and equity | $ | 9,531,181 |  |  | $ | 12,355,794 |
(1) The Company's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs, excluding the Operating Partnership: $41.2 million and $41.2 million of land, $40.5 million and $41.0 million of building and improvements, $— million and $— million of building and leasehold improvements, $— million and $— million of right of use assets, $5.4 million and $4.4 million of accumulated depreciation, $676.9 million and $599.2 million of other assets included in other line items, $50.0 million and $49.8 million of real estate debt, net, $0.9 million and $0.2 million of accrued interest payable, $— million and $— million of lease liabilities, and $306.5 million and $146.4 million of other liabilities included in other line items as of December 31, 2023 and December 31, 2022, respectively.

The accompanying notes are an integral part of these consolidated financial statements.
60

Table of Contents
SL Green Realty Corp.
Consolidated Statements of Operations
(in thousands, except per share data)

|  | Year Ended December 31,
|  | 2023 |  | 2022 |  | 2021
Revenues |  |  |  |  |  |
Rental revenue, net |  | $ | 683,335 |  |  | $ | 671,500 |  |  | $ | 678,176 |
SUMMIT Operator revenue |  | 118,260 |  |  | 89,048 |  |  | 16,311 |
Investment income |  | 34,705 |  |  | 81,113 |  |  | 80,340 |
Other income |  | 77,410 |  |  | 77,793 |  |  | 86,483 |
Total revenues |  | 913,710 |  |  | 919,454 |  |  | 861,310 |
Expenses |  |  |  |  |  |
Operating expenses, including related party expenses of $5 in 2023, $5,701 in 2022 and $12,377 in 2021 |  | 196,696 |  |  | 174,063 |  |  | 167,153 |
Real estate taxes |  | 143,757 |  |  | 138,228 |  |  | 152,835 |
Operating lease rent |  | 27,292 |  |  | 26,943 |  |  | 26,554 |
SUMMIT Operator expenses |  | 101,211 |  |  | 89,207 |  |  | 16,219 |
Interest expense, net of interest income |  | 137,114 |  |  | 89,473 |  |  | 70,891 |
Amortization of deferred financing costs |  | 7,837 |  |  | 7,817 |  |  | 11,424 |
SUMMIT Operator tax expense |  | 9,201 |  |  | 2,647 |  |  | 1,000 |
Depreciation and amortization |  | 247,810 |  |  | 216,167 |  |  | 216,969 |
Loan loss and other investment reserves, net of recoveries |  | 6,890 |  |  | — |  |  | 2,931 |
Transaction related costs |  | 1,099 |  |  | 409 |  |  | 3,773 |
Marketing, general and administrative |  | 111,389 |  |  | 93,798 |  |  | 94,912 |
Total expenses |  | 990,296 |  |  | 838,752 |  |  | 764,661 |
Equity in net loss from unconsolidated joint ventures |  | (76,509) |  |  | (57,958) |  |  | (55,402) |
Equity in net loss on sale of interest in unconsolidated joint venture/real estate |  | (13,368) |  |  | (131) |  |  | (32,757) |
Purchase price and other fair value adjustments |  | (17,260) |  |  | (8,118) |  |  | 210,070 |
(Loss) gain on sale of real estate, net |  | (32,370) |  |  | (84,485) |  |  | 287,417 |
Depreciable real estate reserves and impairments |  | (382,374) |  |  | (6,313) |  |  | (23,794) |
Loss on early extinguishment of debt |  | (870) |  |  | — |  |  | (1,551) |
Net (loss) income |  | (599,337) |  |  | (76,303) |  |  | 480,632 |
Net loss (income) attributable to noncontrolling interests: |  |  |  |  |  |
Noncontrolling interests in the Operating Partnership |  | 37,465 |  |  | 5,794 |  |  | (25,457) |
Noncontrolling interests in other partnerships |  | 4,568 |  |  | (1,122) |  |  | 1,884 |
Preferred units distributions |  | (7,255) |  |  | (6,443) |  |  | (7,305) |
Net (loss) income attributable to SL Green |  | (564,559) |  |  | (78,074) |  |  | 449,754 |
Perpetual preferred stock dividends |  | (14,950) |  |  | (14,950) |  |  | (14,950) |
Net (loss) income attributable to SL Green common stockholders |  | $ | (579,509) |  |  | $ | (93,024) |  |  | $ | 434,804 |
Basic (loss) earnings per share |  | $ | (9.12) |  |  | $ | (1.49) |  |  | $ | 6.57 |
Diluted (loss) earnings per share |  | $ | (9.12) |  |  | $ | (1.49) |  |  | $ | 6.50 |
Basic weighted average common shares outstanding |  | 63,809 |  |  | 63,917 |  |  | 65,740 |
Diluted weighted average common shares and common share equivalents outstanding |  | 67,972 |  |  | 67,929 |  |  | 70,769 |

The accompanying notes are an integral part of these consolidated financial statements.
61

Table of Contents
SL Green Realty Corp.
Consolidated Statements of Comprehensive (Loss) Income
(in thousands)

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Net (loss) income | $ | (599,337) |  |  | $ | (76,303) |  |  | $ | 480,632 |
Other comprehensive (loss) income: |  |  |  |  |
(Decrease) increase in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments | (32,437) |  |  | 103,629 |  |  | 21,427 |
(Decrease) increase in unrealized value of marketable securities | (1,650) |  |  | (1,440) |  |  | 104 |
Other comprehensive (loss) income | (34,087) |  |  | 102,189 |  |  | 21,531 |
Comprehensive (loss) income | (633,424) |  |  | 25,886 |  |  | 502,163 |
Net loss (income) attributable to noncontrolling interests and preferred units distributions | 34,778 |  |  | (1,771) |  |  | (30,878) |
Other comprehensive loss (income) attributable to noncontrolling interests | 1,960 |  |  | (5,827) |  |  | (1,042) |
Comprehensive (loss) income attributable to SL Green | $ | (596,686) |  |  | $ | 18,288 |  |  | $ | 470,243 |

The accompanying notes are an integral part of these consolidated financial statements.
62

Table of Contents
SL Green Realty Corp.
Consolidated Statements of Equity
(in thousands, except per share data)

| SL Green Realty Corp. Stockholders |  |
|  |  | Common Stock |  |  |  |  |  |  |  |  |  |
| Series I Preferred Stock |  | Shares |  | Par Value |  | Additional Paid- In-Capital |  | Treasury Stock |  | Accumulated Other Comprehensive (Loss) Income |  | Retained (Deficit) Earnings |  | Noncontrolling Interests |  | Total
Balance at December 31, 2020 |  | $ | 221,932 |  |  | 66,474 |  |  | $ | 716 |  |  | $ | 3,862,949 |  |  | $ | (124,049) |  |  | $ | (67,247) |  |  | $ | 1,015,462 |  |  | $ | 26,032 |  |  | $ | 4,935,795 |
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  | 449,754 |  |  | (1,884) |  |  | 447,870 |
Other comprehensive income |  |  |  |  |  |  |  |  |  |  |  | 20,489 |  |  |  |  |  |  | 20,489 |
Perpetual preferred stock dividends |  |  |  |  |  |  |  |  |  |  |  |  |  | (14,950) |  |  |  |  | (14,950) |
DRSPP proceeds |  |  |  | 11 |  |  |  |  | 738 |  |  |  |  |  |  |  |  |  |  | 738 |
Reallocation of noncontrolling interest in the Operating Partnership |  |  |  |  |  |  |  |  |  |  |  |  |  | (9,851) |  |  |  |  | (9,851) |
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings |  |  |  | 108 |  |  | 2 |  |  | 32,581 |  |  |  |  |  |  |  |  |  |  | 32,583 |
Repurchases of common stock |  |  |  | (4,474) |  |  | (46) |  |  | (281,206) |  |  |  |  |  |  | (56,372) |  |  |  |  | (337,624) |
Proceeds from stock options exercised |  |  |  | 12 |  |  |  |  | 818 |  |  |  |  |  |  |  |  |  |  | 818 |
Contributions to consolidated joint venture interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 336 |  |  | 336 |
Sale of interest in partially owned entity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,476) |  |  | (4,476) |
Cash distributions to noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (6,631) |  |  | (6,631) |
Issuance of special dividend paid in stock |  |  |  | 1,974 |  |  |  |  | 123,529 |  |  | (2,111) |  |  |  |  | 2,111 |  |  |  |  | 123,529 |
Cash distributions declared ($6.2729 per common share, none of which represented a return of capital for federal income tax purposes) |  |  |  |  |  |  |  |  |  |  |  |  |  | (410,373) |  |  |  |  | (410,373) |
Balance at December 31, 2021 |  | $ | 221,932 |  |  | 64,105 |  |  | $ | 672 |  |  | $ | 3,739,409 |  |  | $ | (126,160) |  |  | $ | (46,758) |  |  | $ | 975,781 |  |  | $ | 13,377 |  |  | $ | 4,778,253 |
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  | (78,074) |  |  | 1,122 |  |  | (76,952) |
Acquisition of subsidiary interest from noncontrolling interest |  |  |  |  |  |  |  | (29,742) |  |  |  |  |  |  |  |  | (75) |  |  | (29,817) |
Other comprehensive income |  |  |  |  |  |  |  |  |  |  |  | 96,362 |  |  |  |  |  |  | 96,362 |
Perpetual preferred stock dividends |  |  |  |  |  |  |  |  |  |  |  |  |  | (14,950) |  |  |  |  | (14,950) |
DRSPP proceeds |  |  |  | 11 |  |  |  |  | 525 |  |  |  |  |  |  |  |  |  |  | 525 |
Reallocation of noncontrolling interest in the Operating Partnership |  |  |  |  |  |  |  |  |  |  |  |  |  | 39,974 |  |  |  |  | 39,974 |
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings |  |  |  | 274 |  |  | 4 |  |  | 32,030 |  |  |  |  |  |  |  |  |  |  | 32,034 |
Repurchases of common stock |  |  |  | (1,971) |  |  | (20) |  |  | (114,979) |  |  |  |  |  |  | (36,198) |  |  |  |  | (151,197) |
Contributions to consolidated joint venture interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 52,164 |  |  | 52,164 |
Cash distributions to noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,699) |  |  | (4,699) |
Issuance of special dividend paid in stock |  |  |  | 1,961 |  |  |  |  | 163,115 |  |  | (2,495) |  |  |  |  |  |  |  |  | 160,620 |
Cash distributions declared ($3.6896 per common share, none of which represented a return of capital for federal income tax purposes) |  |  |  |  |  |  |  |  |  |  |  |  |  | (235,395) |  |  |  |  | (235,395) |
Balance at December 31, 2022 |  | $ | 221,932 |  |  | 64,380 |  |  | $ | 656 |  |  | $ | 3,790,358 |  |  | $ | (128,655) |  |  | $ | 49,604 |  |  | $ | 651,138 |  |  | $ | 61,889 |  |  | $ | 4,646,922 |
Net loss |  |  |  |  |  |  |  |  |  |  |  |  |  | (564,559) |  |  | (4,568) |  |  | (569,127) |
Other comprehensive loss |  |  |  |  |  |  |  |  |  |  |  | (32,127) |  |  |  |  |  |  | (32,127) |
Perpetual preferred stock dividends |  |  |  |  |  |  |  |  |  |  |  |  |  | (14,950) |  |  |  |  | (14,950) |
DRSPP proceeds |  |  |  | 17 |  |  |  |  | 525 |  |  |  |  |  |  |  |  |  |  | 525 |
Reallocation of noncontrolling interest in the Operating Partnership |  |  |  |  |  |  |  |  |  |  |  |  |  | (15,486) |  |  |  |  | (15,486) |
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings |  |  |  | 329 |  |  | 4 |  |  | 35,569 |  |  |  |  |  |  |  |  |  |  | 35,573 |
Contributions to consolidated joint venture interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,066 |  |  | 15,066 |
Cash distributions to noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,777) |  |  | (2,777) |
Cash distributions declared ($3.2288 per common share, none of which represented a return of capital for federal income tax purposes) |  |  |  |  |  |  |  |  |  |  |  |  |  | (207,694) |  |  |  |  | (207,694) |
Balance at December 31, 2023 |  | $ | 221,932 |  |  | 64,726 |  |  | $ | 660 |  |  | $ | 3,826,452 |  |  | $ | (128,655) |  |  | $ | 17,477 |  |  | $ | (151,551) |  |  | $ | 69,610 |  |  | $ | 3,855,925 |

The accompanying notes are an integral part of these consolidated financial statements.
63

Table of Contents
SL Green Realty Corp.
Consolidated Statements of Cash Flows
(in thousands, except per share data)

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Operating Activities |  |  |  |  |
Net (loss) income | $ | (599,337) |  |  | $ | (76,303) |  |  | $ | 480,632 |
Adjustments to reconcile net (loss) income to net cash provided by operating activities: |  |  |  |  |
Depreciation and amortization | 255,647 |  |  | 223,984 |  |  | 228,393 |
Equity in net loss from unconsolidated joint ventures | 76,509 |  |  | 57,958 |  |  | 55,402 |
Distributions of cumulative earnings from unconsolidated joint ventures | 9,897 |  |  | 780 |  |  | 824 |
Equity in net loss on sale of interest in unconsolidated joint venture interest/real estate | 13,368 |  |  | 131 |  |  | 32,757 |
Purchase price and other fair value adjustments | 17,260 |  |  | 8,118 |  |  | (210,070) |
Depreciable real estate reserves and impairments | 382,374 |  |  | 6,313 |  |  | 23,794 |
Loss (gain) on sale of real estate, net | 32,370 |  |  | 84,485 |  |  | (287,417) |
Loan loss and other investment reserves, net of recoveries | 6,890 |  |  | — |  |  | 2,931 |
Loss on early extinguishment of debt | 870 |  |  | — |  |  | 1,551 |
Deferred rents receivable | (17,903) |  |  | (5,749) |  |  | (6,701) |
Non-cash lease expense | 20,435 |  |  | 22,403 |  |  | 17,234 |
Other non-cash adjustments | 28,174 |  |  | (5,676) |  |  | 37,164 |
Changes in operating assets and liabilities: |  |  |  |  |
Tenant and other receivables | (1,725) |  |  | 14,370 |  |  | (20,561) |
Related party receivables | 15,788 |  |  | 6,666 |  |  | (8,727) |
Deferred lease costs | (17,427) |  |  | (21,792) |  |  | (10,117) |
Other assets | (1,922) |  |  | (28,204) |  |  | 20,245 |
Accounts payable, accrued expenses, other liabilities and security deposits | 11,974 |  |  | (30,839) |  |  | (66,387) |
Deferred revenue | 8,057 |  |  | 18,332 |  |  | (1,727) |
Change in lease liability - operating leases | (11,796) |  |  | 1,111 |  |  | (33,241) |
Net cash provided by operating activities | 229,503 |  |  | 276,088 |  |  | 255,979 |
Investing Activities |  |  |  |  |
Acquisitions of real estate property | $ | — |  |  | $ | (64,491) |  |  | $ | (152,791) |
Additions to land, buildings and improvements | (259,663) |  |  | (300,770) |  |  | (302,486) |
Investments in unconsolidated joint ventures | (184,481) |  |  | (184,518) |  |  | (88,872) |
Distributions in excess of cumulative earnings from unconsolidated joint ventures | 140,569 |  |  | 141,742 |  |  | 770,604 |
Net proceeds from disposition of real estate/joint venture interest | 557,611 |  |  | 626,364 |  |  | 651,594 |
Cash and restricted cash assumed from acquisition of real estate investment | — |  |  | 60,494 |  |  | — |
Cash assumed from consolidation of real estate investment | — |  |  | — |  |  | 9,475 |
Proceeds from sale or redemption of marketable securities | — |  |  | 15,626 |  |  | 4,528 |
Purchases of marketable securities | — |  |  | — |  |  | (10,000) |
Other investments | (17,334) |  |  | 1,432 |  |  | 40,200 |
Origination of debt and preferred equity investments | (65,357) |  |  | (51,367) |  |  | (95,695) |
Repayments or redemption of debt and preferred equity investments | — |  |  | 181,293 |  |  | 167,024 |
Net cash provided by investing activities | 171,345 |  |  | 425,805 |  |  | 993,581 |
Financing Activities |  |  |  |  |
Proceeds from mortgages and other loans payable | $ | — |  |  | $ | 381,980 |  |  | $ | 39,689 |
Repayments of mortgages and other loans payable | (25,826) |  |  | (292,364) |  |  | (375,044) |
Proceeds from revolving credit facility, term loans and senior unsecured notes | 538,000 |  |  | 1,524,000 |  |  | 1,488,000 |
Repayments of revolving credit facility, term loans and senior unsecured notes | (828,000) |  |  | (1,864,000) |  |  | (1,808,000) |
Proceeds from stock options exercised and DRSPP issuance | 525 |  |  | 525 |  |  | 1,556 |

64

Table of Contents
SL Green Realty Corp.
Consolidated Statements of Cash Flows
(in thousands, except per share data)

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Repurchase of common stock | — |  |  | (151,197) |  |  | (341,403) |
Redemption of preferred stock | (11,700) |  |  | (17,967) |  |  | (6,040) |
Redemption of OP units | (9,076) |  |  | (40,901) |  |  | (25,703) |
Distributions to noncontrolling interests in other partnerships | (2,777) |  |  | (4,699) |  |  | (6,631) |
Contributions from noncontrolling interests in other partnerships | 6,932 |  |  | 52,164 |  |  | 336 |
Acquisition of subsidiary interest from noncontrolling interest | — |  |  | (29,817) |  |  | — |
Distributions to noncontrolling interests in the Operating Partnership | (14,779) |  |  | (16,272) |  |  | (15,749) |
Dividends paid on common and preferred stock | (230,931) |  |  | (262,136) |  |  | (271,075) |
Other obligation related to secured borrowing | 129,656 |  |  | 77,874 |  |  | 51,862 |
Tax withholdings related to restricted share awards | — |  |  | (3,915) |  |  | (2,990) |
Deferred loan costs | (1,407) |  |  | (8,098) |  |  | (13,745) |
Principal payments on financing lease liabilities | — |  |  | — |  |  | (434) |
Net cash used in financing activities | (449,383) |  |  | (654,823) |  |  | (1,285,371) |
Net (decrease) increase in cash, cash equivalents, and restricted cash | (48,535) |  |  | 47,070 |  |  | (35,811) |
Cash, cash equivalents, and restricted cash at beginning of year | 384,054 |  |  | 336,984 |  |  | 372,795 |
Cash, cash equivalents, and restricted cash at end of period | $ | 335,519 |  |  | $ | 384,054 |  |  | $ | 336,984 |
Supplemental cash flow disclosures: |  |  |  |  |
Interest paid | $ | 229,119 |  |  | $ | 169,519 |  |  | $ | 152,773 |
Income taxes paid | $ | 7,815 |  |  | $ | 5,358 |  |  | $ | 4,405 |
Supplemental Disclosure of Non-Cash Investing and Financing Activities: |  |  |  |  |
Redemption of units in the Operating Partnership for a joint venture sale | $ | — |  |  | $ | — |  |  | $ | 27,586 |
Exchange of preferred equity investment for real estate or equity in joint venture | — |  |  | 190,652 |  |  | — |
Exchange of debt investment for real estate or equity in joint venture | 349,946 |  |  | 193,995 |  |  | 9,468 |
Assumption of mortgage and mezzanine loans | — |  |  | 1,712,750 |  |  | 60,000 |
Issuance of special dividend paid in stock | — |  |  | 160,620 |  |  | 121,418 |
Tenant improvements and capital expenditures payable | — |  |  | 18,518 |  |  | 7,580 |
Fair value adjustment to noncontrolling interest in the Operating Partnership | 15,486 |  |  | 39,974 |  |  | 9,851 |
Investment in joint venture | — |  |  | 47,135 |  |  | — |
Deconsolidation of a subsidiary | 101,351 |  |  | — |  |  | 66,837 |
Deconsolidation of subsidiary debt | 1,712,750 |  |  | — |  |  | 510,000 |
Debt and preferred equity investments | — |  |  | 302 |  |  | 8,372 |
Transfer of assets related to assets held for sale | — |  |  | — |  |  | 140,855 |
Transfer of liabilities related to assets held for sale | — |  |  | — |  |  | 64,120 |
Extinguishment of debt in connection with property dispositions | — |  |  | — |  |  | 53,548 |
Consolidation of real estate investment | — |  |  | — |  |  | 119,444 |
Removal of fully depreciated commercial real estate properties | 16,313 |  |  | 30,359 |  |  | 19,831 |
Sale of interest in partially owned entity | — |  |  | — |  |  | 4,476 |
Contribution to consolidated joint venture by noncontrolling interest | 8,134 |  |  | — |  |  | — |
Distributions to noncontrolling interests | — |  |  | — |  |  | 358 |
Share repurchase or redemption payable | 9,513 |  |  | — |  |  | — |
Recognition of right of use assets and related lease liabilities | — |  |  | 57,938 |  |  | 537,344 |

65

Table of Contents
SL Green Realty Corp.
Consolidated Statements of Cash Flows
(in thousands, except per share data)
In December 2023, the Company declared a regular monthly distribution per share of $0.2500 that was paid in cash. This distribution was paid in January 2024. In December 2022, the Company declared a regular monthly distribution per share of $0.2708 that was paid in cash. This distribution was paid in January 2023. In December 2021, the Company declared a regular monthly distribution per share of $0.3108 that was paid in cash and a special distribution per share of $2.4392 that was paid entirely in stock. These distributions were paid in January 2022.
The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows.

| Year Ended
| 2023 |  | 2022 |  | 2021
Cash and cash equivalents | $ | 221,823 |  |  | $ | 203,273 |  |  | $ | 251,417 |
Restricted cash | 113,696 |  |  | 180,781 |  |  | 85,567 |
Total cash, cash equivalents, and restricted cash | $ | 335,519 |  |  | $ | 384,054 |  |  | $ | 336,984 |

The accompanying notes are an integral part of these consolidated financial statements.
66

Table of Contents
Report of Independent Registered Public Accounting Firm
To the Partners of SL Green Operating Partnership, L.P.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of SL Green Operating Partnership, L.P. (the Operating Partnership) as of December 31, 2023 and 2022, the related consolidated statements of operations, comprehensive (loss) income, capital and cash flows for each of the three years in the period ended December 31, 2023, and the related notes and financial statement schedule listed in the Index at Item 15(a)(2) (collectively referred to as the "consolidated financial statements"). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Operating Partnership at December 31, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023, in conformity with U.S. generally accepted accounting principles.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Operating Partnership's internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 23, 2024 expressed an unqualified opinion thereon.
Basis for Opinion
These financial statements are the responsibility of the Operating Partnership's management. Our responsibility is to express an opinion on the Operating Partnership's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Operating Partnership in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
Critical Audit Matters
The critical audit matters communicated below are matters arising from the current period audit of the financial statements that were communicated or required to be communicated to the audit committee and that: (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Joint Venture Consolidation Assessment
Description of the Matter | The Operating Partnership accounted for certain investments in real estate joint ventures under the equity method of accounting and consolidated certain other investments in real estate joint ventures. At December 31, 2023, the Operating Partnership’s investments in unconsolidated joint ventures was $3.0 billion and noncontrolling interests in consolidated other partnerships was $69.6 million. As discussed in Note 2 to the consolidated financial statements, for each joint venture, the Operating Partnership evaluated the rights provided to each party in the venture to assess the consolidation of the venture.

67

Table of Contents

How We Addressed the Matter in Our Audit | Auditing management’s joint venture consolidation analyses was complex and highly judgmental due to the subjectivity in assessing which activities most significantly impact a joint venture’s economic performance based on the purpose and design of the entity over the duration of its expected life and assessing which party has rights to direct those activities. We tested the Operating Partnership’s controls over the assessment of joint venture consolidation. For example, we tested controls over management's review of the consolidation analyses for newly formed ventures as well as controls over management's identification of reconsideration events which could trigger modified consolidation conclusions for existing ventures. To test the Operating Partnership’s consolidation assessment for real estate joint ventures, our procedures included, among others, reviewing new and amended joint venture agreements and discussing with management the nature of the rights conveyed to the Operating Partnership through the joint venture agreements as well as the business purpose of the joint venture transactions. We reviewed management’s assessment of the activities that would most significantly impact the joint venture’s economic performance and evaluated whether the joint venture agreements provided participating or protective rights to the Operating Partnership. We also evaluated transactions with the joint ventures for events which would require a reconsideration of previous consolidation conclusions.
Impairment of Commercial Real Estate Properties and Investments in Unconsolidated Joint Ventures
Description of the Matter | At December 31, 2023, the Operating Partnership’s commercial real estate properties, at cost totaled approximately $5.0 billion. As described in Note 2 to the consolidated financial statements, real estate properties are periodically reviewed for impairment when circumstances indicate that the carrying value of a property may not be recoverable. For the year ended December 31, 2023, the Operating Partnership recognized $249.5 million of impairment losses on its commercial real estate properties, which is included in depreciable real estate reserves and impairments in the consolidated statements of operations. At December 31, 2023, the Operating Partnership’s investments in unconsolidated joint ventures was $3.0 billion. As described in Note 2 to the consolidated financial statements, investments in unconsolidated joint ventures are assessed for recoverability, and if it is determined that a loss in value of the investment is other than temporary, the investment is written down to its fair value. For the year ended December 31, 2023, the Operating Partnership recognized $132.9 million of other than temporary impairment losses on its investments in unconsolidated joint ventures, which is included in depreciable real estate reserves and impairments in the consolidated statements of operations.
How We Addressed the Matter in Our Audit | Auditing the Operating Partnership’s accounting for impairment of commercial real estate properties and investments in unconsolidated joint ventures was especially challenging and involved a high degree of subjectivity as a result of the assumptions and estimates inherent in the determination of estimated future cash flows and the estimated fair value of commercial real estate properties and investments in unconsolidated joint ventures. In particular, management’s assumptions and estimates included estimated revenue and expense growth rates, discount rates and capitalization rates, which were sensitive to expectations about future operations, market or economic conditions, demand and competition. We obtained an understanding, evaluated the design, and tested the operating effectiveness of controls over the Operating Partnership’s commercial real estate properties and investments in unconsolidated joint ventures impairment process. This included testing of controls over management's review of the significant assumptions and data inputs utilized in the estimation of expected future cash flows and the determination of fair value. To test the Operating Partnership's accounting for impairment of commercial real estate properties and investments in unconsolidated joint ventures, we performed audit procedures that included, among others, evaluating the methodologies applied and testing the significant assumptions discussed above and the underlying data used by the Operating Partnership in its impairment analyses. We held discussions with management about the current status of potential transactions and the Operating Partnership’s intent and ability to fund future operations of investments in unconsolidated joint ventures. We also discussed management’s judgments to understand the probability of future events that could affect the holding period and other cash flow assumptions for the properties. In certain cases, we involved our valuation specialists to assist in performing these procedures. We compared the significant assumptions used by management to historical data and observable market-specific data. We also assessed management’s estimates and performed sensitivity analyses of significant assumptions to evaluate the changes in estimated future cash flows that would result from changes in the assumptions. In addition, we assessed information and events subsequent to the balance sheet date to corroborate certain of the key assumptions utilized by management.

68

Table of Contents
/s/ Ernst & Young LLP
We have served as the Operating Partnership's auditor since 2010.
New York, New York
February 23, 2024
69

Table of Contents
SL Green Operating Partnership, L.P.
Consolidated Balance Sheets
(in thousands, except per unit data)

|  | December 31, 2023 |  | December 31, 2022
Assets |  |  |  |
Commercial real estate properties, at cost: |  |  |  |
Land and land interests |  | $ | 1,092,671 |  |  | $ | 1,576,927 |
Building and improvements |  | 3,655,624 |  |  | 4,903,776 |
Building leasehold and improvements |  | 1,354,569 |  |  | 1,691,831 |
Right of use asset - operating leases |  | 953,236 |  |  | 1,026,265 |
|  | 7,056,100 |  |  | 9,198,799 |
Less: accumulated depreciation |  | (2,035,311) |  |  | (2,039,554) |
|  | 5,020,789 |  |  | 7,159,245 |
Cash and cash equivalents |  | 221,823 |  |  | 203,273 |
Restricted cash |  | 113,696 |  |  | 180,781 |
Investments in marketable securities |  | 9,591 |  |  | 11,240 |
Tenant and other receivables |  | 33,270 |  |  | 34,497 |
Related party receivables |  | 12,168 |  |  | 27,352 |
Deferred rents receivable |  | 264,653 |  |  | 257,887 |
Debt and preferred equity investments, net of discounts and deferred origination fees of $1,630 and $1,811 and allowances of $13,520 and $6,630 in 2023 and 2022, respectively |  | 346,745 |  |  | 623,280 |
Investments in unconsolidated joint ventures |  | 2,983,313 |  |  | 3,190,137 |
Deferred costs, net |  | 111,463 |  |  | 121,157 |
Other assets |  | 413,670 |  |  | 546,945 |
Total assets (1) |  | $ | 9,531,181 |  |  | $ | 12,355,794 |
Liabilities |  |  |  |
Mortgages and other loans payable, net |  | $ | 1,491,319 |  |  | $ | 3,227,563 |
Revolving credit facility, net |  | 554,752 |  |  | 443,217 |
Unsecured term loans, net |  | 1,244,881 |  |  | 1,641,552 |
Unsecured notes, net |  | 99,795 |  |  | 99,692 |
Accrued interest payable |  | 17,930 |  |  | 14,227 |
Other liabilities |  | 471,401 |  |  | 236,211 |
Accounts payable and accrued expenses |  | 153,164 |  |  | 154,867 |
Deferred revenue |  | 134,053 |  |  | 272,248 |
Lease liability - financing leases |  | 105,531 |  |  | 104,218 |
Lease liability - operating leases |  | 827,692 |  |  | 895,100 |
Dividend and distributions payable |  | 20,280 |  |  | 21,569 |
Security deposits |  | 49,906 |  |  | 50,472 |
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities |  | 100,000 |  |  | 100,000 |
Total liabilities (1) |  | 5,270,704 |  |  | 7,260,936 |
Commitments and contingencies |  |  |  |
Limited partner interests in SLGOP (3,949 and 3,670 limited partner common units outstanding at December 31, 2023 and 2022, respectively) |  | 238,051 |  |  | 269,993 |
Preferred units |  | 166,501 |  |  | 177,943 |

70

Table of Contents
SL Green Operating Partnership, L.P.
Consolidated Balance Sheets
(in thousands, except per unit data)

|  | December 31, 2023 |  | December 31, 2022
Capital |  |  |  |
SLGOP partners' capital: |  |  |  |
Series I Preferred Units, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2023 and 2022 |  | 221,932 |  |  | 221,932 |
SL Green partners' capital (687 and 680 general partner common units, and 64,039 and 63,700 limited partner common units outstanding at December 31, 2023 and 2022, respectively) |  | 3,546,906 |  |  | 4,313,497 |
Accumulated other comprehensive income |  | 17,477 |  |  | 49,604 |
Total SLGOP partners' capital |  | 3,786,315 |  |  | 4,585,033 |
Noncontrolling interests in other partnerships |  | 69,610 |  |  | 61,889 |
Total capital |  | 3,855,925 |  |  | 4,646,922 |
Total liabilities and capital |  | $ | 9,531,181 |  |  | $ | 12,355,794 |
(1) The Operating Partnership's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs, excluding the Operating Partnership: $41.2 million and $41.2 million of land, $40.5 million and $41.0 million of building and improvements, $— million and $— million of building and leasehold improvements, $— million and $— million of right of use assets, $5.4 million and $4.4 million of accumulated depreciation, $676.9 million and $599.2 million of other assets included in other line items, $50.0 million and $49.8 million of real estate debt, net, $0.9 million and $0.2 million of accrued interest payable, $— million and $— million of lease liabilities, and $306.5 million and $146.4 million of other liabilities included in other line items as of December 31, 2023 and December 31, 2022, respectively.

The accompanying notes are an integral part of these consolidated financial statements.
71

Table of Contents
SL Green Operating Partnership, L.P.
Consolidated Statements of Operations
(in thousands, except per unit data)

|  | Year Ended December 31,
|  | 2023 |  | 2022 |  | 2021
Revenues |  |  |  |  |  |
Rental revenue, net |  | $ | 683,335 |  |  | $ | 671,500 |  |  | $ | 678,176 |
SUMMIT Operator revenue |  | 118,260 |  |  | 89,048 |  |  | 16,311 |
Investment income |  | 34,705 |  |  | 81,113 |  |  | 80,340 |
Other income |  | 77,410 |  |  | 77,793 |  |  | 86,483 |
Total revenues |  | 913,710 |  |  | 919,454 |  |  | 861,310 |
Expenses |  |  |  |  |  |
Operating expenses, including related party expenses of $5 in 2023, $5,701 in 2022 and $12,377 in 2021 |  | 196,696 |  |  | 174,063 |  |  | 167,153 |
Real estate taxes |  | 143,757 |  |  | 138,228 |  |  | 152,835 |
Operating lease rent |  | 27,292 |  |  | 26,943 |  |  | 26,554 |
SUMMIT Operator expenses |  | 101,211 |  |  | 89,207 |  |  | 16,219 |
Interest expense, net of interest income |  | 137,114 |  |  | 89,473 |  |  | 70,891 |
Amortization of deferred financing costs |  | 7,837 |  |  | 7,817 |  |  | 11,424 |
SUMMIT Operator tax expense |  | 9,201 |  |  | 2,647 |  |  | 1,000 |
Depreciation and amortization |  | 247,810 |  |  | 216,167 |  |  | 216,969 |
Loan loss and other investment reserves, net of recoveries |  | 6,890 |  |  | — |  |  | 2,931 |
Transaction related costs |  | 1,099 |  |  | 409 |  |  | 3,773 |
Marketing, general and administrative |  | 111,389 |  |  | 93,798 |  |  | 94,912 |
Total expenses |  | 990,296 |  |  | 838,752 |  |  | 764,661 |
Equity in net loss from unconsolidated joint ventures |  | (76,509) |  |  | (57,958) |  |  | (55,402) |
Equity in net loss on sale of interest in unconsolidated joint venture/real estate |  | (13,368) |  |  | (131) |  |  | (32,757) |
Purchase price and other fair value adjustments |  | (17,260) |  |  | (8,118) |  |  | 210,070 |
(Loss) gain on sale of real estate, net |  | (32,370) |  |  | (84,485) |  |  | 287,417 |
Depreciable real estate reserves and impairments |  | (382,374) |  |  | (6,313) |  |  | (23,794) |
Loss on early extinguishment of debt |  | (870) |  |  | — |  |  | (1,551) |
Net (loss) income |  | (599,337) |  |  | (76,303) |  |  | 480,632 |
Net loss (income) attributable to noncontrolling interests in other partnerships |  | 4,568 |  |  | (1,122) |  |  | 1,884 |
Preferred units distributions |  | (7,255) |  |  | (6,443) |  |  | (7,305) |
Net (loss) income attributable to SLGOP |  | (602,024) |  |  | (83,868) |  |  | 475,211 |
Perpetual preferred unit dividends |  | (14,950) |  |  | (14,950) |  |  | (14,950) |
Net (loss) income attributable to SLGOP common unitholders |  | $ | (616,974) |  |  | $ | (98,818) |  |  | $ | 460,261 |
Basic (loss) earnings per unit |  | $ | (9.12) |  |  | $ | (1.49) |  |  | $ | 6.57 |
Diluted (loss) earnings per unit |  | $ | (9.12) |  |  | $ | (1.49) |  |  | $ | 6.50 |
Basic weighted average common units outstanding |  | 67,972 |  |  | 67,929 |  |  | 69,727 |
Diluted weighted average common units and common unit equivalents outstanding |  | 67,972 |  |  | 67,929 |  |  | 70,769 |

The accompanying notes are an integral part of these consolidated financial statements.
72

Table of Contents
SL Green Operating Partnership, L.P.
Consolidated Statements of Comprehensive (Loss) Income
(in thousands)

|  | Year Ended December 31,
|  | 2023 |  | 2022 |  | 2021
Net (loss) income |  | $ | (599,337) |  |  | $ | (76,303) |  |  | $ | 480,632 |
Other comprehensive (loss) income: |  |  |  |  |  |
(Decrease) increase in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments |  | (32,437) |  |  | 103,629 |  |  | 21,427 |
(Decrease) increase in unrealized value of marketable securities |  | (1,650) |  |  | (1,440) |  |  | 104 |
Other comprehensive (loss) income |  | (34,087) |  |  | 102,189 |  |  | 21,531 |
Comprehensive (loss) income |  | (633,424) |  |  | 25,886 |  |  | 502,163 |
Net loss (income) attributable to noncontrolling interests |  | 4,568 |  |  | (1,122) |  |  | 1,884 |
Other comprehensive loss (income) attributable to noncontrolling interests |  | 1,960 |  |  | (5,827) |  |  | (1,042) |
Comprehensive (loss) income attributable to SLGOP |  | $ | (626,896) |  |  | $ | 18,937 |  |  | $ | 503,005 |

The accompanying notes are an integral part of these consolidated financial statements.
73

Table of Contents
SL Green Operating Partnership, L.P.
Consolidated Statements of Capital
(in thousands, except per unit data)

|  | SL Green Operating Partnership Unitholders |  |  |  |
|  |  |  | Partners' Interest |  |  |  |  |  |
|  | Series I Preferred Units |  | Common Units |  | Common Unitholders |  | Accumulated Other Comprehensive (Loss) Income |  | Noncontrolling Interests |  | Total
Balance at December 31, 2020 |  | $ | 221,932 |  |  | 66,474 |  |  | $ | 4,755,078 |  |  | $ | (67,247) |  |  | $ | 26,032 |  |  | $ | 4,935,795 |
Net income |  |  |  |  |  | 449,754 |  |  |  |  | (1,884) |  |  | 447,870 |
Other comprehensive income |  |  |  |  |  |  |  | 20,489 |  |  |  |  | 20,489 |
Perpetual preferred unit dividends |  |  |  |  |  | (14,950) |  |  |  |  |  |  | (14,950) |
DRSPP proceeds |  |  |  | 11 |  |  | 738 |  |  |  |  |  |  | 738 |
Reallocation of noncontrolling interests in the Operating Partnership |  |  |  |  |  | (9,851) |  |  |  |  |  |  | (9,851) |
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings |  |  |  | 108 |  |  | 32,583 |  |  |  |  |  |  | 32,583 |
Repurchases of common units |  |  |  | (4,474) |  |  | (337,624) |  |  |  |  |  |  | (337,624) |
Proceeds from stock options exercised |  |  |  | 12 |  |  | 818 |  |  |  |  |  |  | 818 |
Contributions to consolidated joint venture interests |  |  |  |  |  |  |  |  |  | 336 |  |  | 336 |
Sale of interest in partially owned entity |  |  |  |  |  |  |  |  |  | (4,476) |  |  | (4,476) |
Cash distributions to noncontrolling interests |  |  |  |  |  |  |  |  |  | (6,631) |  |  | (6,631) |
Issuance of special distribution paid in units |  |  |  | 1,974 |  |  | 123,529 |  |  |  |  |  |  | 123,529 |
Cash distributions declared ($6.2729 per common unit, none of which represented a return of capital for federal income tax purposes) |  |  |  |  |  | (410,373) |  |  |  |  |  |  | (410,373) |
Balance at December 31, 2021 |  | $ | 221,932 |  |  | 64,105 |  |  | $ | 4,589,702 |  |  | $ | (46,758) |  |  | $ | 13,377 |  |  | $ | 4,778,253 |
Net loss |  |  |  |  |  | (78,074) |  |  |  |  | 1,122 |  |  | (76,952) |
Acquisition of subsidiary interest from noncontrolling interest |  |  |  |  |  | (29,742) |  |  |  |  | (75) |  |  | (29,817) |
Other comprehensive income |  |  |  |  |  |  |  | 96,362 |  |  |  |  | 96,362 |
Perpetual preferred unit dividends |  |  |  |  |  | (14,950) |  |  |  |  |  |  | (14,950) |
DRSPP proceeds |  |  |  | 11 |  |  | 525 |  |  |  |  |  |  | 525 |
Reallocation of noncontrolling interest in the Operating Partnership |  |  |  |  |  | 39,974 |  |  |  |  |  |  | 39,974 |
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings |  |  |  | 274 |  |  | 32,034 |  |  |  |  |  |  | 32,034 |
Repurchases of common units |  |  |  | (1,971) |  |  | (151,197) |  |  |  |  |  |  | (151,197) |
Contributions to consolidated joint venture interests |  |  |  |  |  |  |  |  |  | 52,164 |  |  | 52,164 |
Cash distributions to noncontrolling interests |  |  |  |  |  |  |  |  |  | (4,699) |  |  | (4,699) |
Issuance of special distribution paid in units |  |  |  | 1,961 |  |  | 160,620 |  |  |  |  |  |  | 160,620 |
Cash distributions declared ($3.6896 per common unit, none of which represented a return of capital for federal income tax purposes) |  |  |  |  |  | (235,395) |  |  |  |  |  |  | (235,395) |
Balance at December 31, 2022 |  | $ | 221,932 |  |  | 64,380 |  |  | $ | 4,313,497 |  |  | $ | 49,604 |  |  | $ | 61,889 |  |  | $ | 4,646,922 |
Net loss |  |  |  |  |  | (564,559) |  |  |  |  | (4,568) |  |  | (569,127) |
Other comprehensive loss |  |  |  |  |  |  |  | (32,127) |  |  |  |  | (32,127) |
Perpetual preferred unit dividends |  |  |  |  |  | (14,950) |  |  |  |  |  |  | (14,950) |
DRSPP proceeds |  |  |  | 17 |  |  | 525 |  |  |  |  |  |  | 525 |
Reallocation of noncontrolling interest in the Operating Partnership |  |  |  |  |  | (15,486) |  |  |  |  |  |  | (15,486) |
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings |  |  |  | 329 |  |  | 35,573 |  |  |  |  |  |  | 35,573 |
Contributions to consolidated joint venture interests |  |  |  |  |  |  |  |  |  | 15,066 |  |  | 15,066 |
Cash distributions to noncontrolling interests |  |  |  |  |  |  |  |  |  | (2,777) |  |  | (2,777) |
Cash distributions declared ($3.2288 per common unit, none of which represented a return of capital for federal income tax purposes) |  |  |  |  |  | (207,694) |  |  |  |  |  |  | (207,694) |
Balance at December 31, 2023 |  | $ | 221,932 |  |  | 64,726 |  |  | $ | 3,546,906 |  |  | $ | 17,477 |  |  | $ | 69,610 |  |  | $ | 3,855,925 |

The accompanying notes are an integral part of these consolidated financial statements.
74

Table of Contents
SL Green Operating Partnership, L.P.
Consolidated Statements of Cash Flows
(in thousands)

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Operating Activities |  |  |  |  |
Net (loss) income | $ | (599,337) |  |  | $ | (76,303) |  |  | $ | 480,632 |
Adjustments to reconcile net (loss) income to net cash provided by operating activities: |  |  |  |  |
Depreciation and amortization | 255,647 |  |  | 223,984 |  |  | 228,393 |
Equity in net loss from unconsolidated joint ventures | 76,509 |  |  | 57,958 |  |  | 55,402 |
Distributions of cumulative earnings from unconsolidated joint ventures | 9,897 |  |  | 780 |  |  | 824 |
Equity in net loss on sale of interest in unconsolidated joint venture interest/real estate | 13,368 |  |  | 131 |  |  | 32,757 |
Purchase price and other fair value adjustments | 17,260 |  |  | 8,118 |  |  | (210,070) |
Depreciable real estate reserves and impairments | 382,374 |  |  | 6,313 |  |  | 23,794 |
Loss (gain) on sale of real estate, net | 32,370 |  |  | 84,485 |  |  | (287,417) |
Loan loss reserves and other investment reserves, net of recoveries | 6,890 |  |  | — |  |  | 2,931 |
Loss on early extinguishment of debt | 870 |  |  | — |  |  | 1,551 |
Deferred rents receivable | (17,903) |  |  | (5,749) |  |  | (6,701) |
Non-cash lease expense | 20,435 |  |  | 22,403 |  |  | 17,234 |
Other non-cash adjustments | 28,174 |  |  | (5,676) |  |  | 37,164 |
Changes in operating assets and liabilities: |  |  |  |  |
Tenant and other receivables | (1,725) |  |  | 14,370 |  |  | (20,561) |
Related party receivables | 15,788 |  |  | 6,666 |  |  | (8,727) |
Deferred lease costs | (17,427) |  |  | (21,792) |  |  | (10,117) |
Other assets | (1,922) |  |  | (28,204) |  |  | 20,245 |
Accounts payable, accrued expenses, other liabilities and security deposits | 11,974 |  |  | (30,839) |  |  | (66,387) |
Deferred revenue | 8,057 |  |  | 18,332 |  |  | (1,727) |
Change in lease liability - operating leases | (11,796) |  |  | 1,111 |  |  | (33,241) |
Net cash provided by operating activities | 229,503 |  |  | 276,088 |  |  | 255,979 |
Investing Activities |  |  |  |  |
Acquisitions of real estate property | $ | — |  |  | $ | (64,491) |  |  | $ | (152,791) |
Additions to land, buildings and improvements | (259,663) |  |  | (300,770) |  |  | (302,486) |
Investments in unconsolidated joint ventures | (184,481) |  |  | (184,518) |  |  | (88,872) |
Distributions in excess of cumulative earnings from unconsolidated joint ventures | 140,569 |  |  | 141,742 |  |  | 770,604 |
Net proceeds from disposition of real estate/joint venture interest | 557,611 |  |  | 626,364 |  |  | 651,594 |
Cash and restricted cash assumed from acquisition of real estate investment | — |  |  | 60,494 |  |  | — |
Cash assumed from consolidation of real estate investment | — |  |  | — |  |  | 9,475 |
Proceeds from sale or redemption of marketable securities | — |  |  | 15,626 |  |  | 4,528 |
Purchases of marketable securities | — |  |  | — |  |  | (10,000) |
Other investments | (17,334) |  |  | 1,432 |  |  | 40,200 |
Origination of debt and preferred equity investments | (65,357) |  |  | (51,367) |  |  | (95,695) |
Repayments or redemption of debt and preferred equity investments | — |  |  | 181,293 |  |  | 167,024 |
Net cash provided by investing activities | 171,345 |  |  | 425,805 |  |  | 993,581 |
Financing Activities |  |  |  |  |
Proceeds from mortgages and other loans payable | $ | — |  |  | $ | 381,980 |  |  | $ | 39,689 |
Repayments of mortgages and other loans payable | (25,826) |  |  | (292,364) |  |  | (375,044) |
Proceeds from revolving credit facility, term loans and senior unsecured notes | 538,000 |  |  | 1,524,000 |  |  | 1,488,000 |
Repayments of revolving credit facility, term loans and senior unsecured notes | (828,000) |  |  | (1,864,000) |  |  | (1,808,000) |

75

Table of Contents
SL Green Operating Partnership, L.P.
Consolidated Statements of Cash Flows
(in thousands)

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Proceeds from stock options exercised and DRSPP issuance | 525 |  |  | 525 |  |  | 1,556 |
Repurchase of common units | — |  |  | (151,197) |  |  | (341,403) |
Redemption of preferred units | (11,700) |  |  | (17,967) |  |  | (6,040) |
Redemption of OP units | (9,076) |  |  | (40,901) |  |  | (25,703) |
Distributions to noncontrolling interests in other partnerships | (2,777) |  |  | (4,699) |  |  | (6,631) |
Contributions from noncontrolling interests in other partnerships | 6,932 |  |  | 52,164 |  |  | 336 |
Acquisition of subsidiary interest from noncontrolling interest | — |  |  | (29,817) |  |  | — |
Distributions paid on common and preferred units | (245,710) |  |  | (278,408) |  |  | (286,824) |
Other obligation related to secured borrowing | 129,656 |  |  | 77,874 |  |  | 51,862 |
Tax withholdings related to restricted share awards | — |  |  | (3,915) |  |  | (2,990) |
Deferred loan costs | (1,407) |  |  | (8,098) |  |  | (13,745) |
Principal payments on financing lease liabilities | — |  |  | — |  |  | (434) |
Net cash used in financing activities | (449,383) |  |  | (654,823) |  |  | (1,285,371) |
Net (decrease) increase in cash, cash equivalents, and restricted cash | (48,535) |  |  | 47,070 |  |  | (35,811) |
Cash, cash equivalents, and restricted cash at beginning of year | 384,054 |  |  | 336,984 |  |  | 372,795 |
Cash, cash equivalents, and restricted cash at end of period | $ | 335,519 |  |  | $ | 384,054 |  |  | $ | 336,984 |
Supplemental cash flow disclosures: |  |  |  |  |
Interest paid | $ | 229,119 |  |  | $ | 169,519 |  |  | $ | 152,773 |
Income taxes paid | $ | 7,815 |  |  | $ | 5,358 |  |  | $ | 4,405 |
Supplemental Disclosure of Non-Cash Investing and Financing Activities: |  |  |  |  |
Redemption of units in the Operating Partnership for a joint venture sale | $ | — |  |  | $ | — |  |  | $ | 27,586 |
Exchange of preferred equity investment for real estate or equity in joint venture | — |  |  | 190,652 |  |  | — |
Exchange of debt investment for real estate or equity in joint venture | 349,946 |  |  | 193,995 |  |  | 9,468 |
Assumption of mortgage and mezzanine loans | — |  |  | 1,712,750 |  |  | 60,000 |
Issuance of special distribution paid in units | — |  |  | 160,620 |  |  | 121,418 |
Tenant improvements and capital expenditures payable | — |  |  | 18,518 |  |  | 7,580 |
Fair value adjustment to noncontrolling interest in the Operating Partnership | 15,486 |  |  | 39,974 |  |  | 9,851 |
Investment in joint venture | — |  |  | 47,135 |  |  | — |
Deconsolidation of a subsidiary | 101,351 |  |  | — |  |  | 66,837 |
Deconsolidation of subsidiary debt | 1,712,750 |  |  | — |  |  | 510,000 |
Debt and preferred equity investments | — |  |  | 302 |  |  | 8,372 |
Transfer of assets related to assets held for sale | — |  |  | — |  |  | 140,855 |
Transfer of liabilities related to assets held for sale | — |  |  | — |  |  | 64,120 |
Extinguishment of debt in connection with property dispositions | — |  |  | — |  |  | 53,548 |
Consolidation of real estate investment | — |  |  | — |  |  | 119,444 |
Removal of fully depreciated commercial real estate properties | 16,313 |  |  | 30,359 |  |  | 19,831 |
Sale of interest in partially owned entity | — |  |  | — |  |  | 4,476 |
Contribution to consolidated joint venture by noncontrolling interest | 8,134 |  |  | — |  |  | — |
Distributions to noncontrolling interests | — |  |  | — |  |  | 358 |
Share repurchase or redemption payable | 9,513 |  |  | — |  |  | — |
Recognition of right of use assets and related lease liabilities | — |  |  | 57,938 |  |  | 537,344 |

76

Table of Contents
SL Green Operating Partnership, L.P.
Consolidated Statements of Cash Flows
(in thousands)
In December 2023, the Company declared a regular monthly distribution per share of $0.2500 that was paid in cash. This distribution was paid in January 2024. In December 2022, the Company declared a regular monthly distribution per share of $0.2708 that was paid in cash. This distribution was paid in January 2023. In December 2021, the Company declared a regular monthly distribution per share of $0.3108 that was paid in cash and a special distribution per share of $2.4392 that was paid entirely in stock. These distributions were paid in January 2022.
The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows.

| Year Ended
| 2023 |  | 2022 |  | 2021
Cash and cash equivalents | $ | 221,823 |  |  | $ | 203,273 |  |  | $ | 251,417 |
Restricted cash | 113,696 |  |  | 180,781 |  |  | 85,567 |
Total cash, cash equivalents, and restricted cash | $ | 335,519 |  |  | $ | 384,054 |  |  | $ | 336,984 |

The accompanying notes are an integral part of these consolidated financial statements.
77

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements
December 31, 2023
1. Organization and Basis of Presentation
SL Green Realty Corp., which is referred to as the Company or SL Green, a Maryland corporation, and SL Green Operating Partnership, L.P., which is referred to as SLGOP or the Operating Partnership, a Delaware limited partnership, were formed in June 1997 for the purpose of combining the commercial real estate business of S.L. Green Properties, Inc. and its affiliated partnerships and entities. The Operating Partnership received a contribution of interest in the real estate properties, as well as 95% of the economic interest in the management, leasing and construction companies which are referred to as S.L. Green Management Corp, or the Service Corporation. All of the management, leasing and construction services that are provided to the properties that are wholly-owned by us and that are provided to certain joint ventures are conducted through SL Green Management LLC and S.L. Green Management Corp., respectively, which are 100% owned by the Operating Partnership. The Company has qualified, and expects to qualify in the current fiscal year, as a real estate investment trust, or REIT, under the Internal Revenue Code of 1986, as amended, or the Code, and operates as a self-administered, self-managed REIT. A REIT is a legal entity that holds real estate interests and, through payments of dividends to stockholders, is permitted to minimize the payment of Federal income taxes at the corporate level. Unless the context requires otherwise, all references to "we," "our" and "us" means the Company and all entities owned or controlled by the Company, including the Operating Partnership.
Substantially all of our assets are held by, and all of our operations are conducted through, the Operating Partnership. The Company is the sole managing general partner of the Operating Partnership. As of December 31, 2023, noncontrolling investors held, in the aggregate, a 5.75% limited partnership interest in the Operating Partnership. We refer to these interests as the noncontrolling interests in the Operating Partnership. The Operating Partnership is considered a variable interest entity, or VIE, in which we are the primary beneficiary. See Note 11, "Noncontrolling Interests on the Company's Consolidated Financial Statements."
On December 31, 2023, we owned the following interests in properties in the New York metropolitan area, primarily in midtown Manhattan. Our investments located outside of Manhattan are referred to as the Suburban properties:

|  |  |  | Consolidated |  | Unconsolidated |  | Total |  |
Location |  | Property Type |  | Number of Buildings |  | Approximate Square Feet (unaudited) |  | Number of Buildings |  | Approximate Square Feet (unaudited) |  | Number of Buildings |  | Approximate Square Feet (unaudited) |  | Weighted Average Leased Occupancy(1) (unaudited)
Commercial: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Manhattan |  | Office |  | 13 |  | (2) | 8,399,141 |  |  | 12 |  |  | 15,412,174 |  |  | 25 |  | (2) | 23,811,315 |  | (2) | 89.4 | %
|  | Retail |  | 3 |  | (2) | 40,536 |  |  | 7 |  |  | 281,796 |  |  | 10 |  | (2) | 322,332 |  | (2) | 91.2 | %
|  | Development/Redevelopment |  | 3 |  | (3) | 1,443,771 |  |  | 3 |  |  | 2,893,357 |  |  | 6 |  | (2) | 4,337,128 |  | (2) | N/A
|  |  |  | 19 |  |  | 9,883,448 |  |  | 22 |  |  | 18,587,327 |  |  | 41 |  |  | 28,470,775 |  |  | 89.5 | %
Suburban |  | Office |  | 7 |  |  | 862,800 |  |  | — |  |  | — |  |  | 7 |  |  | 862,800 |  |  | 77.1 | %
Total commercial properties |  | 26 |  |  | 10,746,248 |  |  | 22 |  |  | 18,587,327 |  |  | 48 |  |  | 29,333,575 |  |  | 89.0 | %
Residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Manhattan |  | Residential |  | 1 |  | (3) | 140,382 |  |  | 1 |  |  | 221,884 |  |  | 2 |  |  | 362,266 |  |  | 99.0 | %
Total portfolio |  | 27 |  |  | 10,886,630 |  |  | 23 |  |  | 18,809,211 |  |  | 50 |  |  | 29,695,841 |  |  | 89.2 | %

(1)The weighted average leased occupancy for commercial properties represents the total leased square footage divided by the total square footage at acquisition. The weighted average leased for residential properties represents the total leased units divided by the total available units. Properties under construction are not included in the calculation of weighted average leased occupancy.
(2)Includes assets within the Company's alternative strategy portfolio. Within that portfolio, office includes one building totaling 2,048,725 square feet, retail includes eight buildings totaling 286,738 square feet, and development/redevelopment includes two buildings totaling 1,496,931 square feet.
(3)As of December 31, 2023, we owned a building at 7 Dey Street / 185 Broadway that was comprised of approximately 140,382 square feet (unaudited) of residential space and approximately 50,206 square feet (unaudited) of office and retail space that is under development. For the purpose of this report, we have included this building in the number of residential properties we own. However, we have included only the residential square footage in the residential approximate square footage, and have listed the balance of the square footage as development square footage.
78

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
As of December 31, 2023, we also managed one office building and one retail building owned by a third party encompassing approximately 0.4 million square feet (unaudited), and held debt and preferred equity investments with a book value of $346.7 million, excluding debt and preferred equity investments and other financing receivables totaling $7.9 million that are included in balance sheet line items other than the Debt and preferred equity investments line item.
Partnership Agreement
In accordance with the partnership agreement of the Operating Partnership, or the Operating Partnership Agreement, we allocate all distributions and profits and losses in proportion to the percentage of ownership interests of the respective partners, subject to the priority distributions with respect to preferred units and special provisions that apply to Long Term Incentive Plan ("LTIP") Units. As the managing general partner of the Operating Partnership, we are required to take such reasonable efforts, as determined by us in our sole discretion, to cause the Operating Partnership to distribute sufficient amounts to enable the payment of sufficient dividends by us to minimize any Federal income or excise tax at the Company level. Under the Operating Partnership Agreement, each limited partner has the right to redeem units of limited partnership interests for cash, or if we so elect, shares of SL Green's common stock on a one-for-one basis.
Subsequent Events
In January 2024, the Company closed on the acquisition of interests in the joint venture that owns the leasehold interest at 2 Herald for no consideration, which increases the Company's interest in the joint venture to 95.0%. In addition, the joint venture entered into an agreement to satisfy the existing $182.5 million mortgage on the property for a net payment of $7.0 million, which closed in February 2024. See Note 6, "Investments in Unconsolidated Joint Ventures."
In January 2024, together with its joint venture partner, the Company closed on the sale of the retail condominium at 717 Fifth Avenue for a total consideration of $963.0 million. See Note 6, "Investments in Unconsolidated Joint Ventures."
2. Significant Accounting Policies
Principles of Consolidation
The consolidated financial statements include our accounts and those of our subsidiaries, which are wholly-owned or controlled by us. Entities which we do not control through our voting interest and entities which are variable interest entities, but where we are not the primary beneficiary, are accounted for under the equity method. See Note 5, "Debt and Preferred Equity Investments" and Note 6, "Investments in Unconsolidated Joint Ventures." All significant intercompany balances and transactions have been eliminated.
We consolidate a VIE in which we are considered the primary beneficiary. The primary beneficiary is the entity that has (i) the power to direct the activities that most significantly impact the entity's economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE.
A noncontrolling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to us. Noncontrolling interests are required to be presented as a separate component of equity in the consolidated balance sheet and the presentation of net income is modified to present earnings and other comprehensive income (loss) attributed to controlling and noncontrolling interests.
We assess the accounting treatment for each joint venture and debt and preferred equity investment. This assessment includes a review of each joint venture or limited liability company agreement to determine the rights provided to each party and whether those rights are protective or participating. For all VIEs, we review such agreements in order to determine which party has the power to direct the activities that most significantly impact the entity's economic performance. In situations where we and our partner approve, among other things, the annual budget, receive a detailed monthly reporting package, meet on a quarterly basis to review the results of the joint venture, review and approve the joint venture's tax return before filing, and approve all leases that cover more than a nominal amount of space relative to the total rentable space at each property, we do not consolidate the joint venture as we consider these to be substantive participation rights that result in shared power of the activities that most significantly impact the performance of the joint venture. Our joint venture agreements typically contain certain protective rights such as requiring partner approval to sell, finance or refinance the property and the payment of capital expenditures and operating expenditures outside of the approved budget or operating plan.
79

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Investment in Commercial Real Estate Properties
Real estate properties are presented at cost less accumulated depreciation and amortization. Costs directly related to the development or redevelopment of properties are capitalized. Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives.
We recognize the assets acquired, liabilities assumed (including contingencies) and any noncontrolling interests in an acquired entity at their respective fair values on the acquisition date. When we acquire our partner's equity interest in an existing unconsolidated joint venture and gain control over the investment, we record the consolidated investment at fair value. The difference between the book value of our equity investment on the purchase date and our share of the fair value of the investment's purchase price is recorded as a purchase price fair value adjustment in our consolidated statements of operations. See Note 3, "Property Acquisitions."
We allocate the purchase price of real estate to land and building (inclusive of tenant improvements) and, if determined to be material, intangibles, such as the value of above- and below-market leases and origination costs associated with the in-place leases. We depreciate the amount allocated to building (inclusive of tenant improvements) over their estimated useful lives, which generally range from 3 years to 40 years. We amortize the amount allocated to the above- and below-market leases over the remaining term of the associated lease, which generally range from 1 year to 15 years, and record it as either an increase (in the case of below-market leases) or a decrease (in the case of above-market leases) to rental income. We amortize the amount allocated to the values associated with in-place leases over the expected term of the associated lease, which generally ranges from 1 year to 15 years. If a tenant vacates its space prior to the contractual termination of the lease and no rental payments are being made on the lease, any unamortized balance of the related intangible will be written off. The tenant improvements and origination costs are amortized as an expense over the remaining life of the lease (or charged against earnings if the lease is terminated prior to its contractual expiration date). We assess fair value of the leases based on estimated cash flow projections that utilize appropriate discount rates and available market information. Estimates of future cash flows are based on a number of factors including the historical operating results, known trends, and market/economic conditions that may affect the property. To the extent acquired leases contain fixed rate renewal options that are below-market and determined to be material, we amortize such below-market lease value into rental income over the renewal period. As of December 31, 2023, the weighted average amortization period for above-market leases, below-market leases, and in-place lease costs is 4.7 years, 8.1 years, and 3.1 years, respectively.
The Company classifies those leases under which the Company is the lessee at lease commencement as finance or operating leases. Leases qualify as finance leases if the lease transfers ownership of the asset at the end of the lease term, the lease grants an option to purchase the asset that we are reasonably certain to exercise, the lease term is for a major part of the remaining economic life of the asset, or the present value of the lease payments exceeds substantially all of the fair value of the asset. Leases that do not qualify as finance leases are deemed to be operating leases. At lease commencement the Company records a lease liability which is measured as the present value of the lease payments and a right of use asset which is measured as the amount of the lease liability and any initial direct costs incurred. The Company applies a discount rate to determine the present value of the lease payments. If the rate implicit in the lease is known, the Company uses that rate. If the rate implicit in the lease is not known, the Company uses a discount rate reflective of the Company’s collateralized borrowing rate given the term of the lease. To determine the discount rate, the Company employs a third party specialist to develop an analysis based primarily on the observable borrowing rates of the Company, other REITs, and other corporate borrowers with long-term borrowings. On the consolidated statements of operations, operating leases are expensed through operating lease rent while financing leases are expensed through amortization and interest expense. When applicable, the Company combines the consideration for lease and non-lease components in the calculation of the value of the lease obligation and right-of-use asset.
We incur a variety of costs in the development and leasing of our properties. After the determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. Determination of when a development project is substantially complete and capitalization must cease involves a degree of judgment. The costs of land and building under development include specifically identifiable costs. The capitalized costs include, but are not limited to, pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs and other costs incurred during the period of development. We consider a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year after major construction activity ceases. We cease capitalization on the portions substantially completed and occupied or held available for occupancy, and capitalize only those costs associated with the portions under construction.
80

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Properties other than Right of use assets - operating leases are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows:

Category |  | Term
Building (fee ownership) |  | 40 years
Building improvements |  | shorter of remaining life of the building or useful life
Building (leasehold interest) |  | lesser of 40 years or remaining term of the lease
Right of use assets - financing leases |  | lesser of 40 years or remaining lease term
Furniture and fixtures |  | 4 to 7 years
Tenant improvements |  | shorter of remaining term of the lease or useful life

Right of use assets - operating leases are amortized over the remaining lease term. The amortization is made up of the principal amortization under the lease liability plus or minus the straight-line adjustment of the operating lease rent under ASC 842.
Depreciation expense (including amortization of right of use assets - financing leases) totaled $221.0 million, $190.1 million, and $187.3 million for the years ended December 31, 2023, 2022 and 2021, respectively.
On a periodic basis, we assess whether there are any indications that the value of our real estate consolidated properties may be impaired or that their carrying value may not be recoverable. A consolidated property's value is considered impaired if management's estimate of the aggregate future cash flows (undiscounted) to be generated by the property is less than the carrying value of the property. To the extent impairment has occurred, the loss will be measured as the excess of the carrying amount of the property over the fair value of the property as calculated in accordance with Accounting Standards Codification, or ASC 820. We also evaluate our real estate consolidated properties for impairment when a property has been classified as held for sale. Real estate assets held for sale are valued at the lower of their carrying value or fair value less costs to sell and depreciation expense is no longer recorded.
In April 2023, the ground rent appraisal proceeding concluded for our wholly-owned leasehold interest at 625 Madison Avenue. As a result of that proceeding, the ground rent was reset from the previous rent of $4.61 million per annum to a new rent of $20.25 million per annum, effective as of July 1, 2022. Following a strategic review of the property that addressed a range of relevant considerations, including the increase in ground rent to an amount substantially above what the Company believed was appropriate, the Company recorded a $249.5 million charge to write down the carrying value of its investment in the leasehold interest to zero for the year ended December 31, 2023, which is included in Depreciable real estate reserves and impairments in the consolidated statement of operations.
For the years ended December 31, 2023 and 2022, we recognized $14.2 million and $5.7 million, respectively, of rental revenue for the amortization of aggregate below-market leases in excess of above-market leases resulting from the allocation of the purchase price of the applicable properties. For the year ended December 31, 2021, we recognized a reduction of rental revenue of ($4.2 million) for the amortization of aggregate above-market leases in excess of below-market leases.
The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of December 31, 2023 and 2022 (in thousands):

| December 31, 2023 |  | December 31, 2022
Identified intangible assets (included in other assets): |  |  |
Gross amount | $ | 189,680 |  |  | $ | 403,552 |
Accumulated amortization | (184,902) |  |  | (190,066) |
Net | $ | 4,778 |  |  | $ | 213,486 |
Identified intangible liabilities (included in deferred revenue): |  |  |
Gross amount | $ | 205,394 |  |  | $ | 361,338 |
Accumulated amortization | (202,089) |  |  | (212,191) |
Net | $ | 3,305 |  |  | $ | 149,147 |

81

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
The estimated annual amortization of acquired above-market leases, net of acquired (below-market) leases (a component of rental revenue), for each of the five succeeding years is as follows (in thousands):

2024 |  | $ | 36 |
2025 |  | 234 |
2026 |  | 205 |
2027 |  | 184 |
2028 |  | 70 |

The estimated annual amortization of all other identifiable assets (a component of depreciation and amortization expense) including tenant improvements for each of the five succeeding years is as follows (in thousands):

2024 |  | $ | 1,096 |
2025 |  | 728 |
2026 |  | 551 |
2027 |  | 312 |
2028 |  | 158 |

Cash and Cash Equivalents
We consider all highly liquid investments with maturity of three months or less when purchased to be cash equivalents.
Restricted Cash
Restricted cash primarily consists of security deposits held on behalf of our tenants, interest reserves, as well as capital improvement and real estate tax escrows required under certain loan agreements.
Fair Value Measurements
See Note 16, "Fair Value Measurements."
Investment in Marketable Securities
At acquisition, we designate a debt security as held-to-maturity, available-for-sale, or trading. As of December 31, 2023, we did not have any debt securities designated as held-to-maturity or trading. We account for our available-for-sale securities at fair value pursuant to ASC 820-10, with the net unrealized gains or losses reported as a component of accumulated other comprehensive income or loss. The cost of marketable securities sold and the amount reclassified out of accumulated other comprehensive income into earnings is determined using the specific identification method. Credit losses are recognized in accordance with ASC 326. We account for our equity marketable securities at fair value pursuant to ASC 820-10, with the net unrealized gains or losses reported in net income.
As of December 31, 2023 and 2022, we held the following marketable securities (in thousands):

| December 31, 2023 |  | December 31, 2022
Commercial mortgage-backed securities | $ | 9,591 |  |  | $ | 11,240 |
Total investment in marketable securities | $ | 9,591 |  |  | $ | 11,240 |

The cost basis of the commercial mortgage-backed securities was $11.5 million as of December 31, 2023 and 2022. These securities mature at various times through 2030. All securities were in an unrealized loss position as of December 31, 2023 and 2022 with an unrealized loss of $1.9 million and fair market value of $9.6 million as of December 31, 2023, and an unrealized loss of $0.3 million and a fair market value of $11.2 million as of December 31, 2022. The securities were in a continuous unrealized loss position for more than 12 months as of December 31, 2023 and less than 12 months as of December 31, 2022. We do not intend to sell our other securities, and it is more likely than not that we will not be required to sell the investment before the recovery of their amortized cost basis.
During the year ended December 31, 2023, we did not dispose of any debt marketable securities. During the year ended December 31, 2022, we received aggregate net proceeds of $7.8 million from the sale of one debt marketable security and $3.7 million from the repayment of one debt marketable security. During the year ended December 31, 2021, we received aggregate net proceeds of $4.5 million from the repayment of one debt marketable security.
82

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
We held no equity marketable securities as of December 31, 2023 and 2022 as we sold the one equity marketable security that was held as of December 31, 2021 during the year ended December 31, 2022, for which we received aggregate net proceeds of $4.2 million. We did not dispose of any equity marketable securities during the year ended December 31, 2021. We recognized $6.5 million of realized losses and $0.6 million of unrealized gains for the years ended December 31, 2022 and 2021, respectively.
Investments in Unconsolidated Joint Ventures
We account for our investments in unconsolidated joint ventures under the equity method of accounting in cases where we exercise significant influence over, but do not control, these entities and are not considered to be the primary beneficiary. We consolidate those joint ventures that we control or which are variable interest entities (each, a "VIE") and where we are considered to be the primary beneficiary. In all these joint ventures, the rights of the joint venture partner are both protective as well as participating. Unless we are determined to be the primary beneficiary in a VIE, these participating rights preclude us from consolidating these VIE entities. These investments are recorded initially at cost, as investments in unconsolidated joint ventures, and subsequently adjusted for equity in net income (loss) and cash contributions and distributions. Equity in net income (loss) from unconsolidated joint ventures is allocated based on our ownership or economic interest in each joint venture and includes adjustments related to basis differences in accounting for the investment. When a capital event (as defined in each joint venture agreement) such as a refinancing occurs, if return thresholds are met, future equity income will be allocated at our increased economic interest. We recognize incentive income from unconsolidated real estate joint ventures as income to the extent it is earned and not subject to a clawback feature. Distributions we receive from unconsolidated real estate joint ventures in excess of our basis in the investment are recorded as offsets to our investment balance if we remain liable for future obligations of the joint venture or may otherwise be committed to provide future additional financial support. We generally finance our joint ventures with non-recourse debt. In certain cases we may provide guarantees or master leases, which terminate upon the satisfaction of specified circumstances or repayment of the underlying loans.
We assess our investments in unconsolidated joint ventures for recoverability, and if it is determined that a loss in value of the investment is other than temporary, we write down the investment to its fair value. We evaluate our equity investments for impairment based on each joint ventures' actual and projected cash flows. Aside from charges noted in Note 6, "Investment in Unconsolidated Joint Ventures," we do not believe that the values of any of our equity investments were impaired at December 31, 2023.
We may originate loans for real estate acquisition, development and construction ("ADC loans"), where we expect to receive some of the residual profit from such projects. When the risk and rewards of these arrangements are essentially the same as an investor or joint venture partner, we account for these arrangements as real estate investments under the equity method of accounting for investments. Otherwise, we account for these arrangements consistent with the accounting for our debt and preferred equity investments.
Deferred Lease Costs
Deferred lease costs consist of incremental fees and direct costs that would not have been incurred if the lease had not been obtained and are amortized on a straight-line basis over the related lease term. Certain of our employees provide leasing services to the wholly-owned properties. For the years ended December 31, 2023, 2022 and 2021, $6.8 million, $6.6 million, and $6.2 million of their compensation, respectively, was capitalized and is amortized over an estimated average lease term of seven years.
Deferred Financing Costs
Deferred financing costs represent commitment fees, legal, title and other third party costs associated with obtaining commitments for financing which result in a closing of such financing. These costs are amortized over the terms of the respective agreements. Unamortized deferred financing costs are expensed when the associated debt is refinanced or repaid before maturity. Costs incurred in seeking financing transactions, which do not close, are expensed in the period in which it is determined that the financing will not close. Deferred financing costs related to a recognized debt liability are presented in the consolidated balance sheet as a direct deduction from the carrying amount of that debt liability.
83

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Lease Classification
Lease classification for leases under which the Company is the lessor is evaluated at lease commencement and leases not classified as sales-type leases or direct financing leases are classified as operating leases. Leases qualify as sales-type leases if the contract includes either transfer of ownership clauses, certain purchase options, a lease term representing a major part of the economic life of the asset, or the present value of the lease payments and residual guarantees provided by the lessee exceeds substantially all of the fair value of the asset. Additionally, leasing an asset so specialized that it is not deemed to have any value to the Company at the end of the lease term may also result in classification as a sales-type lease. Leases qualify as direct financing leases when the present value of the lease payments and residual value guarantees provided by the lessee and unrelated third parties exceeds substantially all of the fair value of the asset and collection of the payments is probable.
Revenue Recognition
Rental revenue for operating leases is recognized on a straight-line basis over the term of the lease. Rental revenue recognition commences when the leased space is available for its intended use by the lessee.
To determine whether the leased space is available for its intended use by the lessee, management evaluates whether we or the tenant are the owner of tenant improvements for accounting purposes. When management concludes that we are the owner of tenant improvements, rental revenue recognition begins when the tenant takes possession of the finished space, which is when such tenant improvements are substantially complete. In certain instances, when management concludes that we are not the owner of tenant improvements, rental revenue recognition begins when the tenant takes possession of or controls the space.
The excess of rents recognized over amounts contractually due pursuant to the underlying leases are included in deferred rents receivable on the consolidated balance sheets.
In addition to base rent, our tenants also generally will pay variable rent which represents their pro rata share of increases in real estate taxes and certain operating expenses for the building over a base year. In some leases, in lieu of paying additional rent based upon increases in certain building operating expenses, the tenant will pay additional rent based upon increases in the wage rate paid to porters over the porters' wage rate in effect during a base year or increases in the consumer price index over the index value in effect during a base year. In addition, many of our leases contain fixed percentage increases over the base rent to cover escalations. Electricity is most often supplied by the landlord either on a sub-metered basis, or rent inclusion basis (i.e., a fixed fee is included in the rent for electricity, which amount may increase based upon increases in electricity rates or increases in electrical usage by the tenant). Base building services other than electricity (such as heat, air conditioning and freight elevator service during business hours, and base building cleaning) are typically provided at no additional cost, with the tenant paying additional rent only for services which exceed base building services or for services which are provided outside normal business hours. These escalations are based on actual expenses incurred in the prior calendar year. If the expenses in the current year are different from those in the prior year, then during the current year, the escalations will be adjusted to reflect the actual expenses for the current year.
Rental revenue is recognized if collectability is probable. If collectability of substantially all of the lease payments is assessed as not probable, any difference between the rental revenue recognized to date and the lease payments that have been collected is recognized as a current-period adjustment to rental revenue. A subsequent change in the assessment of collectability to probable may result in a current-period adjustment to rental revenue for any difference between the rental revenue that would have been recognized if collectability had always been assessed as probable and the rental revenue recognized to date.
The Company provides its tenants with certain customary services for lease contracts such as common area maintenance and general security. We have elected to combine the non-lease components with the lease components of our operating lease agreements and account for them as a single lease component in accordance with ASC 842.
We record a gain or loss on sale of real estate assets when we no longer have a controlling financial interest in the entity owning the real estate, a contract exists with a third party and that third party has control of the assets acquired.
Investment income on debt and preferred equity investments is accrued based on the contractual terms of the instruments and when it is deemed collectible. Some debt and preferred equity investments provide for accrual of interest at specified rates, which differ from current payment terms. Interest is recognized on such loans at the accrual rate subject to management's determination that accrued interest is collectible. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt.
84

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Deferred origination fees, original issue discounts and loan origination costs, if any, are recognized as an adjustment to interest income over the terms of the related investments using the effective interest method. Fees received in connection with loan commitments are also deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield. Discounts or premiums associated with the purchase of loans are amortized or accreted into interest income as a yield adjustment on the effective interest method based on expected cash flows through the expected maturity date of the related investment. If we purchase a debt or preferred equity investment at a discount, intend to hold it until maturity and expect to recover the full value of the investment, we accrete the discount into income as an adjustment to yield over the term of the investment. If we purchase a debt or preferred equity investment at a discount with the intention of foreclosing on the collateral, we do not accrete the discount. For debt investments acquired at a discount for credit quality, the difference between contractual cash flows and expected cash flows at acquisition is not accreted. Anticipated exit fees, the collection of which is expected, are also recognized over the term of the loan as an adjustment to yield.
We consider a debt and preferred equity investment to be past due when amounts contractually due have not been paid. Debt and preferred equity investments are placed on a non-accrual status at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of interest income becomes doubtful. Interest income recognition is resumed on any debt or preferred equity investment that is on non-accrual status when such debt or preferred equity investment becomes contractually current and performance is demonstrated to be resumed.
We may syndicate a portion of the loans that we originate or sell the loans individually. When a transaction meets the criteria for sale accounting, we recognize gain or loss based on the difference between the sales price and the carrying value of the loan sold. Any related unamortized deferred origination fees, original issue discounts, loan origination costs, discounts or premiums at the time of sale are recognized as an adjustment to the gain or loss on sale, which is included in investment income on the consolidated statement of operations. Any fees received at the time of sale or syndication are recognized as part of investment income.
Asset management fees are recognized on a straight-line basis over the term of the asset management agreement.
Revenues from the sale of SUMMIT tickets are recognized upon admission or ticket expirations. Deferred revenue related to unused and unexpired tickets as of December 31, 2023 and 2022 was $2.6 million and $2.0 million, respectively, and is included in Deferred revenue on the consolidated balance sheets.
Debt and Preferred Equity Investments
Debt and preferred equity investments are presented at the net amount expected to be collected in accordance with ASC 326. An allowance for loan losses is deducted from the amortized cost basis of the financial assets to present the net carrying value at the amount expected to be collected through the expected maturity date of such investments. The expense for loan loss and other investment reserves is the charge to earnings to adjust the allowance for loan losses to the appropriate level. Amounts are written off from the allowance when we de-recognize the related investment either as a result of a sale of the investment or acquisition of equity interests in the collateral.
The Company evaluates the amount expected to be collected based on current market and economic conditions, historical loss information, and reasonable and supportable forecasts. The Company's assumptions are derived from both internal data and external data which may include, among others, governmental economic projections for the New York City Metropolitan area, public data on recent transactions and filings for securitized debt instruments. This information is aggregated by asset class and adjusted for duration. Based on these inputs, loans are evaluated at the individual asset level. In certain instances, we may also use a probability-weighted model that considers the likelihood of multiple outcomes and the amount expected to be collected for each outcome.
The evaluation of the possible credit deterioration associated with the performance and/or value of the underlying collateral property as well as the financial and operating capability of the borrower/sponsor requires significant judgment, which include both asset level and market assumptions over the relevant time period.
In addition, quarterly, the Company assigns each loan a risk rating. Based on a 3-point scale, loans are rated “1” through “3,” from lower risk to higher risk, which ratings are defined as follows: 1 - Low Risk Assets - Low probability of loss, 2 - Watch List Assets - Higher potential for loss, 3 - High Risk Assets - Loss more likely than not. Loans with risk ratings of 2 or above are evaluated to determine whether the expected risk of loss is appropriately captured through the combination of our expectations of current conditions, historical loss information and supportable forecasts described above or whether risk characteristics specific to the loan warrant the use of a probability-weighted model.
85

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Financing investments that are classified as held for sale are carried at the expected amount to be collected or fair market value using available market information obtained through consultation with dealers or other originators of such investments as well as discounted cash flow models based on Level 3 data pursuant to ASC 820-10. As circumstances change, management may conclude not to sell an investment designated as held for sale. In such situations, the investment will be reclassified at its expected amount to be collected.
Other financing receivables that are included in balance sheet line items other than the Debt and preferred equity investments line are also measured at the net amount expected to be collected.
Accrued interest receivable amounts related to these debt and preferred equity investment and other financing receivables are recorded at the net amount expected to be collected within Other assets in the consolidated balance sheets. Accrued interest receivables that are written off are recognized as an expense in loan loss and other investment reserves.
Rent Expense
Rent expense is recognized on a straight-line basis over the initial term of the lease. The excess of the rent expense recognized over the amounts contractually due pursuant to the underlying lease is included in the lease liability - operating leases on the consolidated balance sheets.
Underwriting Commissions and Costs
Underwriting commissions and costs incurred in connection with our stock offerings are reflected as a reduction of additional paid-in-capital.
Transaction Costs
Transaction costs for real estate asset acquisitions are capitalized to the investment basis, which is then subject to a purchase price allocation based on relative fair value. Transaction costs for business combinations or costs incurred on potential transactions that are not consummated are expensed as incurred.
Income Taxes
SL Green is taxed as a REIT under Section 856(c) of the Code. As a REIT, SL Green generally is not subject to Federal income tax. To maintain its qualification as a REIT, SL Green must distribute at least 90% of its REIT taxable income to its stockholders and meet certain other requirements. If SL Green fails to qualify as a REIT in any taxable year, SL Green will be subject to Federal income tax on its taxable income at regular corporate rates. SL Green may also be subject to certain state, local and franchise taxes. Under certain circumstances, Federal income and excise taxes may be due on its undistributed taxable income.
The Operating Partnership is a partnership and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective income tax returns. The only provision for income taxes included in the consolidated statements of operations relates to the Operating Partnership’s consolidated taxable REIT subsidiaries. The Operating Partnership may also be subject to certain state, local and franchise taxes.
We have elected, and may elect in the future, to treat certain of our corporate subsidiaries as taxable REIT subsidiaries, or TRSs. In general, TRSs may perform non-customary services for the tenants of the Company, hold assets that we cannot hold directly and generally may engage in any real estate or non-real estate related business. The TRSs generate income, resulting in Federal, state and local corporate tax liability for these entities. SUMMIT is held in a TRS and pays Federal, state and local taxes. During the years ended December 31, 2023, 2022 and 2021, we recorded Federal, state and local tax expense for SUMMIT of $9.2 million, $2.6 million, and $1.0 million, respectively.
During the years ended December 31, 2023, 2022 and 2021, we recorded Federal, state and local tax provisions of $8.2 million, $3.7 million, and $2.8 million, respectively. For the year ended December 31, 2023, the Company paid distributions on its common stock of $3.25 per share which represented $0.00 per share of ordinary income and $3.25 per share of capital gains. For the year ended December 31, 2022, the Company paid distributions on its common stock of $6.17 per share which represented $2.56 per share of ordinary income, and $1.17 per share of capital gains. For the year ended December 31, 2021, the Company paid distributions on its common stock of $8.09 per share which represented $0.50 per share of ordinary income and $5.92 per share of capital gains.
86

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
We follow a two-step approach for evaluating uncertain tax positions. Recognition (step one) occurs when an enterprise concludes that a tax position, based solely on its technical merits, is more-likely-than-not to be sustained upon examination. Measurement (step two) determines the amount of benefit that is more-likely-than-not to be realized upon settlement. Derecognition of a tax position that was previously recognized would occur when a company subsequently determines that a tax position no longer meets the more-likely-than-not threshold of being sustained. The use of a valuation allowance as a substitute for derecognition of tax positions is prohibited.
Stock Based Employee Compensation Plans
We have a stock-based employee compensation plan, described more fully in Note 14, "Share-based Compensation."
For share-based awards with a performance or market measure, we recognize compensation cost over the requisite service period, using the accelerated attribution expense method. The requisite service period begins on the date the compensation committee of our Board of Directors authorizes the award, adopts any relevant performance measures and communicates the award to the employees. For programs with awards that vest based on the achievement of a performance condition or market condition, we determine whether it is probable that the performance condition will be met, and estimate compensation cost based on the fair value of the award at the applicable award date estimated using a binomial model or market quotes. For share-based awards for which there is no pre-established performance measure, we recognize compensation cost over the service vesting period, which represents the requisite service period, on a straight-line basis. In accordance with the provisions of our share-based incentive compensation plans, we accept the return of shares of the Company's common stock, at the current quoted market price, from certain key employees to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period.
Awards can also be made in the form of a separate series of units of limited partnership interest in the Operating Partnership called long-term incentive plan units, or LTIP units. LTIP units, which can be granted either as free-standing awards or in tandem with other awards under our stock incentive plan, are valued by reference to the value of the Company's common stock at the time of grant and are subject to such conditions and restrictions as the compensation committee of the Company's board of directors may determine, including continued employment or service, computation of financial metrics and/or achievement of pre-established performance goals and objectives.
The Company's stock options are recorded at fair value at the time of issuance. Fair value of the stock options is determined using the Black-Scholes option pricing model. The Black-Scholes model was developed for use in estimating the fair value of traded options, which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our plan has characteristics significantly different from those of traded options and because changes in the subjective input assumptions can materially affect the fair value estimate, in our opinion, the existing models do not necessarily provide a reliable single measure of the fair value of the employee stock options.
Compensation cost for stock options, if any, is recognized over the vesting period of the award. Our policy is to grant options with an exercise price equal to the quoted closing market price of the Company's common stock on either the grant date or the date immediately preceding the grant date. Awards of stock or restricted stock are expensed as compensation over the benefit period based on the fair value of the stock on the grant date.
Derivative Instruments
In the normal course of business, we use a variety of commonly used derivative instruments, including, but not limited to, interest rate swaps, caps, collars and floors, to manage interest rate risk. Effectiveness is essential for those derivatives that we intend to qualify for hedge accounting. Some derivative instruments are associated with an anticipated transaction. In those cases, hedge effectiveness criteria also require that it be probable that the underlying transaction occurs. Instruments that meet these hedging criteria are formally designated as hedges at the inception of the derivative contract.
To determine the fair values of derivative instruments, we use a variety of methods and assumptions that are based on market conditions and risks existing at each balance sheet date. For the majority of financial instruments including most derivatives, long-term investments and long-term debt, standard market conventions and techniques such as discounted cash flow analysis, option pricing models, replacement cost, and termination cost are used to determine fair value. All methods of assessing fair value result in a general approximation of value, and such value may never actually be realized.
87

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
In the normal course of business, we are exposed to the effect of interest rate changes and limit these risks by following established risk management policies and procedures including the use of derivatives. To address exposure to interest rates, derivatives are used primarily to fix the rate on debt based on floating-rate indices and manage the cost of borrowing obligations.
We use a variety of conventional derivative products. These derivatives include, but are not limited to, interest rate swaps, caps, collars and floors. We expressly prohibit the use of unconventional derivative instruments and using derivative instruments for trading or speculative purposes. Further, we have a policy of only entering into contracts with major financial institutions based upon their credit ratings and other factors.
We may employ swaps, forwards or purchased options to hedge qualifying forecasted transactions. Gains and losses related to these transactions are deferred and recognized in net income as interest expense in the same period or periods that the underlying transaction occurs, expires or is otherwise terminated.
Hedges that are reported at fair value and presented on the balance sheet could be characterized as cash flow hedges or fair value hedges. Interest rate caps and collars are examples of cash flow hedges. Cash flow hedges address the risk associated with future cash flows of interest payments. For all hedges held by us that meet the hedging objectives established by our corporate policy governing interest rate risk management, no net gains or losses were reported in earnings. The changes in fair value of derivative instruments designated as hedge instruments are reflected in accumulated other comprehensive income. For derivative instruments not designated as hedging instruments, the gain or loss, resulting from the change in the estimated fair value of the derivative instruments, is recognized in current earnings during the period of change.
Earnings per Share of the Company
The Company presents both basic and diluted earnings per share ("EPS") using the two-class method, which is an earnings allocation formula that determines EPS for common stock and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPS is computed by dividing the income available to common stockholders by the weighted-average number of common stock shares outstanding for the period. Basic EPS includes participating securities, consisting of unvested restricted stock that receive nonforfeitable dividends similar to shares of common stock. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, where such exercise or conversion would result in a lower EPS amount. Diluted EPS also includes units of limited partnership interest. The dilutive effect of stock options is reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method.
Earnings per Unit of the Operating Partnership
The Operating Partnership presents both basic and diluted earnings per unit ("EPU") using the two-class method, which is an earnings allocation formula that determines EPU for common units and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPU is computed by dividing the income available to common unitholders by the weighted-average number of common units outstanding for the period. Basic EPU includes participating securities, consisting of unvested restricted units that receive nonforfeitable dividends similar to shares of common units. Diluted EPU reflects the potential dilution that could occur if securities or other contracts to issue common units were exercised or converted into common units, where such exercise or conversion would result in a lower EPU amount. The dilutive effect of unit options is reflected in the weighted average diluted outstanding units calculation by application of the treasury stock method.
Use of Estimates
The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Concentrations of Credit Risk
Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash investments, debt and preferred equity investments and accounts receivable. We place our cash investments with high quality financial institutions. The collateral securing our debt and preferred equity investments is located in New York City. See Note 5, "Debt and Preferred Equity Investments."
88

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
We perform initial and ongoing evaluations of the credit quality of our tenants and require most tenants to provide security deposits or letters of credit. Though these security deposits and letters of credit are insufficient to meet the total value of a tenant's lease obligation, they are a measure of good faith and a potential source of funds to offset the economic costs associated with lost revenue from that tenant and the costs associated with re-tenanting a space. The properties in our real estate portfolio are located in the New York metropolitan area, principally in Manhattan. Our tenants operate in various industries. Other than one tenant, Paramount Global (formerly ViacomCBS Inc.), which accounted for 5.9% of our share of annualized cash rent as of December 31, 2023, no other tenant in our portfolio accounted for more than 5.0% of our share of annualized cash rent, including our share of joint venture annualized cash rent, as of December 31, 2023.
For the years ended December 31, 2023, 2022, and 2021, the following properties contributed more than 5.0% of our annualized cash rent from office properties, including our share of annualized cash rent from joint venture office properties:

Property | 2023 | Property | 2022 | Property | 2021
One Vanderbilt Avenue | 16.0% | One Vanderbilt Avenue | 14.1% | 11 Madison Avenue | 10.8%
11 Madison Avenue | 8.3% | 245 Park Avenue | 10.0% | 420 Lexington Avenue | 8.3%
420 Lexington Avenue | 6.7% | 11 Madison Avenue | 7.8% | 1515 Broadway | 8.1%
1515 Broadway | 6.4% | 420 Lexington Avenue | 6.3% | 1185 Avenue of the Americas | 8.0%
1185 Avenue of the Americas | 5.6% | 1515 Broadway | 5.8% | 280 Park Avenue | 6.7%
280 Park Avenue | 5.5% | 1185 Avenue of the Americas | 5.1% | 919 Third Avenue | 5.3%
245 Park Avenue | 5.5% | 280 Park Avenue | 5.1% | 485 Lexington Avenue | 5.3%
|  |  |  | 555 West 57th Street | 5.2%

As of December 31, 2023, 57.6% of our work force is covered by five collective bargaining agreements, and 1.3% of our work force is covered by collective bargaining agreements that expire before December 31, 2024. See Note 19, "Benefits Plans."
Reclassification
Certain prior year balances have been reclassified to conform to our current year presentation.
As of December 31, 2023, the SUMMIT meets the criteria of a reportable operating segment pursuant to the guidance in ASC 280. Accordingly, we reclassified SUMMIT Operator revenue, SUMMIT Operator expenses, and SUMMIT Operator tax expense to separate financial statement line items in our consolidated statements of operations. These items were previously presented on a net basis in Other income. Additionally, the depreciation and amortization of SUMMIT assets are included in Depreciation and amortization in our consolidated statements of operations. Prior period balances have been reclassified to conform to the current period presentation.
Accounting Standards Updates
In December 2023, the FASB issued ASU No. 2023-09 Income Taxes (Topic 740) - Improvements to Income Tax Disclosures. The objective of the amendments in ASU 2023-09 related to the rate reconciliation and income taxes paid disclosures are to improve transparency of income tax disclosures by requiring consistent categories and greater disaggregation of information in the rate reconciliation, and income taxes paid disaggregated by jurisdiction. The amendment will require that public entities on an annual basis disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a quantitative threshold. Additionally, the amendment will require that all entities disclose on an annual basis the amount of taxes paid (net of refunds received) disaggregated by federal, state and foreign taxes as well as disaggregated by individual jurisdictions that meet a quantitative threshold. ASU 2023-09 is effective prospectively for annual periods beginning after December 15, 2024. Early adoption and retrospective application is permitted. We are currently evaluating the impact of the adoption of ASU 2023-09 on our consolidated financial statements, but do not believe the adoption of this standard will have a material impact on our consolidated financial statements.
89

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
In November 2023, the FASB issued ASU No. 2023-07 Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures. ASU 2023-07 amends the reportable segment disclosure requirements to enhance disclosures about significant segment expenses. The objective of the amendment is to improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. The amendment will require that a public entity disclose, on an annual and interim basis, significant segment expenses that are regularly provided to the chief operating decision maker ("CODM") and included within each reported measure of segment profit or loss (collectively referred to as the "significant expense principle"). Additionally, the amendment will require an entity to disclose an amount for "other segment items" by reportable segment and a description of its composition as well as require annual disclosures about a reportable segment's profit or loss and assets currently required by Topic 280 in interim periods. Lastly, the amendment will require a public entity to disclose the title and position of the CODM and an explanation of how the CODM uses the reported measures of segment profit or loss in assessing segment performance and deciding to allocate resources. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted and should be applied retrospectively to all prior periods presented in the financial statements. We are currently evaluating the impact of the adoption of ASU 2023-07 on our consolidated financial statements, but do not believe the adoption of this standard will have a material impact on our consolidated financial statements.
In August 2023, the FASB issued ASU No. 2023-05 Business Combinations - Joint Venture Formations (Subtopic 805-60) Recognition and Initial Measurement. ASU 2023-05 addresses the accounting for contributions made to a joint venture, upon formation, in a joint venture's separate financial statements. The objectives of the amendments are to provide decision-useful information to investors and other allocators of capital in a joint venture's financial statements and reduce diversity in practice. The amendments require that a joint venture apply the following key adaptations from the business combinations guidance upon formation: (i) a joint venture is the formation of a new entity without an accounting acquirer, (ii) a joint venture measures its identifiable net assets and goodwill, if any, at the formation date, (iii) initial measurement of a joint venture's total net assets is equal to the fair value of 100 percent of the joint venture's equity, and (iv) a joint venture provides relevant disclosures. ASU 2023-05 is effective prospectively for all joint venture formations with a formation date on or after January 1, 2025, with early adoption permitted in any interim or annual period in which financial statements have not yet been issued, either prospectively or retrospectively. We are currently evaluating the impact of the adoption of ASU 2023-05 on our consolidated financial statements, but do not believe the adoption of this standard will have a material impact on our consolidated financial statements.
In March 2022, the FASB issued ASU No. 2022-02 Financial Instruments - Credit Losses (Topic 326) Troubled Debt Restructurings and Vintage Disclosures. ASU 2022-02 eliminates the troubled debt restructuring recognition and measurement guidance and, instead, requires that an entity evaluate whether the modification represents a new loan or a continuation of an existing loan. The amendments enhance existing disclosure requirements and introduce new requirements related to certain modifications of receivables made to borrowers experiencing financial difficulties. Additionally, ASU 2022-02 requires an entity to disclose current-period gross write-offs by year of origination for financing receivables and net investment in leases within the scope of Subtopic 326-20. Gross write-off information must be included in the vintage disclosures required for entities in accordance with Subtopic 326-20, which requires that an entity disclose the amortized cost basis of financing receivables by credit-quality indicator and class of financing receivable by year of origination. ASU 2022-02 is effective for reporting periods beginning after December 15, 2022, including interim periods within those fiscal years, with early adoption permitted. The Company adopted this guidance on January 1, 2023 and it did not have a material impact on the Company's consolidated financial statements.
In July 2021, the FASB issued ASU No. 2021-05 Leases (Topic 842) Lessors - Certain Leases with Variable Lease Payments. ASU 2021-05 amends the lease classification requirements for lessors when classifying and accounting for a lease with variable lease payments that do not depend on a reference rate index or a rate. The update provides criteria, that if met, the lease would be classified and accounted for as an operating lease. ASU 2021-05 is effective for reporting periods beginning after December 15, 2021. The Company adopted this guidance on January 1, 2022 and it did not have a material impact on the Company's consolidated financial statements.
90

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
In August 2020, the FASB issued Accounting Standard Update, or "ASU," No. 2020-06 Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40). ASU 2020-06 simplifies the accounting for convertible instruments by reducing the number of accounting models for convertible debt instruments and convertible preferred stock, removes certain settlement conditions that are required for equity contracts to qualify for the derivative scope exception and also simplifies the diluted earnings per share calculation in certain areas. ASU 2020-06 is effective for reporting periods beginning after December 15, 2021. The Company adopted this guidance on January 1, 2022 and it did not have a material impact on the Company's consolidated financial statements.
In March 2020, the FASB issued ASU No. 2020-04 Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting and then in January 2021, the FASB issued ASU No. 2021-01. The amendments provide practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The guidance is optional and is effective between March 12, 2020 and December 31, 2024, which was extended from the original sunset date of December 31, 2022 when the FASB issued ASU No. 2022-06 in December 2022. The guidance may be elected over time as reference rate reform activities occur. During the first quarter of 2020, the Company elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. Application of these expedients preserves the presentation of derivatives consistent with past presentation. The impact of this guidance did not have a material impact on the Company's consolidated financial statements.
3. Property Acquisitions
2023 Acquisitions
During the year ended December 31, 2023, we did not acquire any properties from a third party.
2022 Acquisitions
The following table summarizes the properties acquired during the year ended December 31, 2022:

Property |  | Acquisition Date |  | Property Type |  | Approximate Square Feet |  | Gross Asset Valuation (in millions)
245 Park Avenue (1) |  | September 2022 |  | Fee Interest |  | 1,782,793 |  | $ | 1,960.0 |

(1)On October 31, 2021, HNA, through an affiliated entity, filed for Chapter 11 bankruptcy protection on account of its investment in 245 Park Avenue, together with another asset in Chicago. On July 8, 2022, certain of the debtors and affiliates of SL Green entered into a Plan Sponsorship and Investment Agreement (the "Plan"). Since the debtors did not receive any qualifying bids for the property and the Plan was confirmed, SL Green acquired full ownership and control of the property in September 2022, at which time our outstanding preferred equity and accrued interest balance were credited to our equity investment in the property. We recorded the assets acquired and liabilities assumed at fair value. See Note 16, "Fair Value Measurements."
2021 Acquisitions
The following table summarizes the properties acquired during the year ended December 31, 2021:

Property |  | Acquisition Date |  | Property Type |  | Approximate Square Feet |  | Gross Asset Valuation (in millions)
885 Third Avenue (1) |  | January 2021 |  | Fee Interest |  | 625,000 |  | $ | 387.9 |
461 Fifth Avenue (2) |  | June 2021 |  | Fee Interest |  | 200,000 |  | 28.0 |
1591-1597 Broadway |  | September 2021 |  | Fee Interest |  | 7,684 |  | 121.0 |
690 Madison Avenue (3) |  | September 2021 |  | Fee Interest |  | 7,848 |  | 72.2 |

(1)In January 2021, pursuant to the partnership documents of our 885 Third Avenue investment, certain participating rights of the common member expired. As a result, it was determined that this investment is a VIE in which we are the primary beneficiary, and the investment was consolidated in our financial statements. Upon consolidating the entity, the assets and liabilities of the entity were recorded at fair value. Prior to January 2021, the investment was accounted for under the equity method. See Note 6, "Investments in Unconsolidated Joint Ventures."
(2)In April 2021, the Company exercised its option to acquire the fee interest in the property from the ground lessor and the Company acquired the fee interest in June 2021. The Company held the leasehold interest in the property prior to exercising its option.
(3)In September 2021, the Company was the successful bidder for the fee interest in 690 Madison Avenue at the foreclosure of the asset. The property previously served as collateral for a debt and preferred equity investment. We recorded the assets acquired and liabilities assumed at fair value.
91

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
4. Properties Held for Sale and Property Dispositions
Properties Held for Sale
As of December 31, 2023 and 2022, no properties were classified as held for sale.
Property Dispositions
The following table summarizes the properties sold during the years ended December 31, 2023, 2022, and 2021:

Property |  | Disposition Date |  | Property Type |  | Unaudited Approximate Usable Square Feet |  | Sales Price (1) (in millions) |  | (Loss) Gain on Sale (2) (in millions)
245 Park Avenue (3) |  | June 2023 |  | Fee Interest |  | 1,782,793 |  |  | $ | 1,995.0 |  |  | $ | (28.3) |
885 Third Avenue - Office Condominium Units (4) |  | December 2022 |  | Fee / Leasehold Interest |  | 414,317 |  |  | 300.4 |  |  | (24.0) |
609 Fifth Avenue |  | June 2022 |  | Fee Interest |  | 138,563 |  |  | 100.5 |  |  | (80.2) |
1591-1597 Broadway |  | May 2022 |  | Fee Interest |  | 7,684 |  |  | 121.0 |  |  | (4.5) |
1080 Amsterdam Avenue |  | April 2022 |  | Leasehold Interest |  | 85,250 |  |  | 42.7 |  |  | 17.9 |
707 Eleventh Avenue |  | February 2022 |  | Fee Interest |  | 159,720 |  |  | 95.0 |  |  | (0.8) |
110 East 42nd Street |  | December 2021 |  | Fee Interest |  | 215,400 |  |  | 117.1 |  |  | 3.6 |
590 Fifth Avenue |  | October 2021 |  | Fee Interest |  | 103,300 |  |  | 103.0 |  |  | (3.2) |
220 East 42nd Street (5) |  | July 2021 |  | Fee Interest |  | 1,135,000 |  |  | 783.5 |  |  | 175.1 |
635-641 Sixth Avenue |  | June 2021 |  | Fee Interest |  | 267,000 |  |  | 325.0 |  |  | 99.4 |
106 Spring Street (6) |  | March 2021 |  | Fee Interest |  | 5,928 |  |  | 35.0 |  |  | (2.8) |
133 Greene Street (6) |  | February 2021 |  | Fee Interest |  | 6,425 |  |  | 15.8 |  |  | 0.2 |
712 Madison Avenue (7) |  | January 2021 |  | Fee Interest |  | 6,600 |  |  | 43.0 |  |  | (1.4) |

(1)Sales price represents the gross sales price for a property or the gross asset valuation for interests in a property.
(2)The (losses) gains on sale are net of $11.3 million, $11.2 million, and $13.7 million of employee compensation accrued in connection with the realization of the investment dispositions during the years ended December 31, 2023, 2022, and 2021, respectively. Additionally, amounts do not include adjustments for expenses recorded in subsequent periods.
(3)In June 2023, the Company sold a 49.9% interest, which resulted in the Company no longer retaining a controlling interest in the entity, as defined in ASC 810, and deconsolidation of the 50.1% interest we retained. We recorded our retained investment at fair value which resulted in the recognition of a fair value adjustment of ($17.0 million) that is reflected in the Company's consolidated statements of operations within Purchase price and other fair value adjustments. See Note 6, "Investments in Unconsolidated Joint Venture" and Note 16, " Fair Value Measurements."
(4)In December 2022, the Company sold 414,317 square feet of office leasehold condominium units at the property. The Company retained the remaining 218,796 square feet of the building.
(5)In July 2021, the Company sold a 49.9% interest, which resulted in the Company no longer retaining a controlling interest in the entity, as defined in ASC 810, and the deconsolidation of the 51.0% interest we retained. We recorded our investment at fair value which resulted in the recognition of a fair value adjustment of $206.8 million, which is reflected in the Company's consolidated statements of operations within Purchase price and other fair value adjustments. See Note 6, "Investments in Unconsolidated Joint Ventures."
(6)In March 2021, the property was foreclosed by the lender.
(7)Disposition resulted from the ground lessee exercising its purchase option under a ground lease arrangement.
92

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
5. Debt and Preferred Equity Investments
Below is a summary of the activity in our debt and preferred equity investments for the years ended December 31, 2023 and 2022 (in thousands):

| December 31, 2023 |  | December 31, 2022
Balance at beginning of year (1) | $ | 623,280 |  |  | $ | 1,088,723 |
Debt investment originations/fundings/accretion (2) | 72,160 |  |  | 62,992 |
Preferred equity investment originations/accretion (2) | 8,142 |  |  | 37,505 |
Redemptions/sales/syndications/equity ownership/amortization | (349,947) |  |  | (565,940) |
Net change in loan loss reserves | (6,890) |  |  | — |
Balance at end of period (1) | $ | 346,745 |  | (3) | $ | 623,280 |

(1)Net of unamortized fees, discounts, and premiums.
(2)Accretion includes amortization of fees and discounts and paid-in-kind investment income.
(3)Includes two investments with a total carrying value of $49.8 million that are included in the Company's alternative strategy portfolio.
Below is a summary of our debt and preferred equity investments as of December 31, 2023 (dollars in thousands):

| Floating Rate |  | Fixed Rate |  | Total Carrying Value |  | Senior Financing | Maturity(1)
Type | Carrying Value | Face Value | Interest Rate |  | Carrying Value | Face Value | Interest Rate |  |
Mezzanine Debt | $ | 168,745 |  | $ | 168,912 |  | S + 4.95 - 12.38% |  | $ | 50,000 |  | $ | 50,000 |  | 8.00 - 8.40% |  | $ | 218,745 |  | (2) | $ | 1,071,858 |  | 2024 - 2029
Preferred Equity | — |  | — |  | — |  | 128,000 |  | 128,000 |  | 6.5% |  | 128,000 |  |  | 250,000 |  | 2027 |
Balance at end of period | $ | 168,745 |  | $ | 168,912 |  |  |  | $ | 178,000 |  | $ | 178,000 |  |  |  | $ | 346,745 |  |  | $ | 1,321,858 |  |

(1)Excludes available extension options to the extent they have not been exercised as of the date of this filing.
(2)Includes two investments with a total carrying value of $49.8 million that are included in the Company's alternative strategy portfolio.
The following table is a roll forward of our total allowance for loan losses for the years ended December 31, 2023, 2022 and 2021 (in thousands):

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Balance at beginning of year | $ | 6,630 |  |  | $ | 6,630 |  |  | $ | 13,213 |
Current period provision for loan loss | 6,890 |  |  | — |  |  | — |
Write-offs charged against the allowance | — |  |  | — |  |  | (6,583) |
Balance at end of period | $ | 13,520 |  | (1) | $ | 6,630 |  |  | $ | 6,630 |

(1)As of December 31, 2023, all financing receivables on non-accrual had an allowance for loan loss except for one debt investment with a carrying value of $49.8 million, which is included in the Company's alternative strategy portfolio.
As of December 31, 2023, two investments with a total carrying value, net of reserves, of $49.8 million were not performing in accordance with their respective terms. As of December 31, 2022, one investment with a carrying value, net of reserves, of $6.9 million was not performing in accordance with its respective terms. This is further discussed in the Debt Investments and Preferred Equity Investments tables below.
No other financing receivables were 90 days past due as of December 31, 2023 and December 31, 2022.
93

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
The following table sets forth the carrying value of our debt and preferred equity investment portfolio by risk rating as of December 31, 2023 and 2022 (dollars in thousands):

Risk Rating |  | December 31, 2023 |  | December 31, 2022
1 - Low Risk Assets - Low probability of loss |  | $ | 210,333 |  |  | $ | 264,069 |
2 - Watch List Assets - Higher potential for loss |  | 136,412 |  | (1) | 352,321 |
3 - High Risk Assets - Loss more likely than not |  | — |  |  | 6,890 |
|  | $ | 346,745 |  |  | $ | 623,280 |

(1)Includes two investments with a total carrying value of $49.8 million that are included in the Company's alternative strategy portfolio.
The following table sets forth the carrying value of our debt and preferred equity investment portfolio by year of origination and risk rating as of December 31, 2023 (dollars in thousands):

|  | As of December 31,
Risk Rating |  | 2023(1) |  | 2022(1) |  | 2021(1) |  | Prior(1)(2) |  | Total
1 - Low Risk Assets - Low probability of loss |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 210,333 |  |  | $ | 210,333 |
2 - Watch List Assets - Higher potential for loss |  | — |  |  | — |  |  | — |  |  | 136,412 |  | (3) | 136,412 |
3 - High Risk Assets - Loss more likely than not |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
|  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 346,745 |  |  | $ | 346,745 |

(1)Year in which the investment was originated or acquired by us or in which a material modification occurred.
(2)During the year ended December 31, 2023, we recognized a $6.9 million provision for loan loss related to an investment originated prior to 2021.
(3)Includes two investments with a total carrying value of $49.8 million that are included in the Company's alternative strategy portfolio.
We have determined that we have one portfolio segment of financing receivables as of December 31, 2023 and 2022 comprised of commercial real estate which is primarily recorded in debt and preferred equity investments.
Included in Other assets is an additional amount of financing receivables representing loans to joint venture partners totaling $8.8 million and $9.0 million as of December 31, 2023 and 2022, respectively. The Company recorded no provisions for loan losses related to these financing receivables for the years ended December 31, 2023 and 2022, respectively. All of these loans have a risk rating of 2 and were performing in accordance with their respective terms. One loan with a carrying value of $5.6 million was put on non-accrual in July 2020 and remains on non-accrual as of December 31, 2023. No investment income has been recognized subsequent to it being put on non-accrual.
94

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Debt Investments
As of December 31, 2023 and 2022, we held the following debt investments with an aggregate weighted average current yield of 8.68% as of December 31, 2023 (dollars in thousands):

|  | December 31, 2023 |  | December 31, 2022 |  |
Loan Type |  | Future Funding Obligations |  | Senior Financing |  | Carrying Value (1) |  | Carrying Value (1) |  | Maturity Date (2)
Fixed Rate Investments: |  |  |  |  |  |  |  |  |  |
Mezzanine Loan (3) (4) (6) |  | $ | — |  |  | $ | 105,000 |  |  | $ | 13,366 |  |  | $ | 13,366 |  |  | June 2024
Mezzanine Loan |  | — |  |  | 95,000 |  |  | 30,000 |  |  | 30,000 |  |  | January 2025
Mezzanine Loan |  | — |  |  | 85,000 |  |  | 20,000 |  |  | 20,000 |  |  | December 2029
Mezzanine Loan |  | — |  |  | — |  |  | — |  |  | 225,367 |  |  |
Mezzanine Loan |  | — |  |  | — |  |  | — |  |  | 77,109 |  |  |
Total fixed rate |  | $ | — |  |  | $ | 285,000 |  |  | $ | 63,366 |  |  | $ | 365,842 |  |  |
Floating Rate Investments: |  |  |  |  |  |  |  |  |  |
Mezzanine Loan (5) (6) |  | $ | — |  |  | $ | 275,000 |  |  | $ | 50,000 |  |  | $ | 50,000 |  |  | April 2023
Mezzanine Loan |  | 3,761 |  |  | 54,000 |  |  | 8,243 |  |  | 8,243 |  |  | May 2024
Mezzanine Loan |  | 2,655 |  |  | 271,774 |  |  | 62,333 |  |  | 46,884 |  |  | May 2024
Mezzanine Loan |  | 10,760 |  |  | 186,084 |  |  | 48,323 |  |  | 39,083 |  |  | January 2026
Total floating rate |  | $ | 17,176 |  |  | $ | 786,858 |  |  | $ | 168,899 |  |  | $ | 144,210 |  |  |
Allowance for loan loss |  | $ | — |  |  | $ | — |  |  | $ | (13,520) |  |  | $ | (6,630) |  |  |
Total |  | $ | 17,176 |  |  | $ | 1,071,858 |  |  | $ | 218,745 |  |  | $ | 503,422 |  |  |

(1)Carrying value is net of discounts, premiums, original issue discounts and deferred origination fees.
(2)Represents contractual maturity, excluding any extension options to the extent they have not been exercised as of the date of this filing.
(3)Carrying value is net of a $12.0 million participation that was sold and did not meet the conditions for sale accounting, which is included in Other assets and Other liabilities on the consolidated balance sheets.
(4)This loan went into default and was put on non-accrual in June 2020 and remains on non-accrual as of December 31, 2023. No investment income has been recognized subsequent to it being put on non-accrual. In the first quarter of 2023, the Company fully reserved the balance of the investment. Additionally, we determined the borrower entity to be a VIE, in which we are not the primary beneficiary.
(5)This loan went into default and was put on non-accrual in January 2023 and remains on non-accrual as of December 31, 2023. No investment income has been recognized subsequent to it being put on non-accrual. The Company is in discussions with the borrower with respect to the loan.
(6)Included in the Company's alternative strategy portfolio.
Preferred Equity Investments
As of December 31, 2023 and 2022, we held the following preferred equity investments with an aggregate weighted average current yield of 6.55% as of December 31, 2023 (dollars in thousands):

|  | December 31, 2023 |  | December 31, 2022 |  |
Type |  | Future Funding Obligations |  | Senior Financing |  | Carrying Value (1) |  | Carrying Value (1) |  | Mandatory Redemption (2)
Preferred Equity |  | $ | — |  |  | $ | 250,000 |  |  | $ | 128,000 |  |  | $ | 119,858 |  |  | February 2027
Total |  | $ | — |  |  | $ | 250,000 |  |  | $ | 128,000 |  |  | $ | 119,858 |  |  |

(1)Carrying value is net of deferred origination fees.
(2)Represents contractual redemption, excluding any unexercised extension options.
95

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
6. Investments in Unconsolidated Joint Ventures
We have investments in several real estate joint ventures with various partners. As of December 31, 2023, the book value of these investments was $3.0 billion, net of investments with negative book values totaling $149.1 million for which we have an implicit commitment to fund future capital needs.
As of December 31, 2023, 800 Third Avenue and 625 Madison Avenue are VIEs in which we are not the primary beneficiary. As of December 31, 2022, 800 Third Avenue and 21 East 66th Street are VIEs in which we are not the primary beneficiary. Our net equity investment in these VIEs was $437.9 million as of December 31, 2023 and $86.2 million as of December 31, 2022. Our maximum loss is limited to the amount of our equity investment in these VIEs. See the "Principles of Consolidation" section of Note 2, "Significant Accounting Policies". All other investments below are voting interest entities. As we do not control the joint ventures listed below, we account for them under the equity method of accounting.
The table below provides general information on each of our joint ventures as of December 31, 2023:

Property | Partner | Ownership Interest (1) | Economic Interest (1) | Unaudited Approximate Square Feet
100 Park Avenue | Prudential Real Estate Investors | 49.90% | 49.90% | 834,000 |
717 Fifth Avenue (2) (3) | Wharton Properties / Private Investor | 10.92% | 10.92% | 119,500 |
800 Third Avenue | Private Investors | 60.52% | 60.52% | 526,000 |
919 Third Avenue | New York State Teacher's Retirement System | 51.00% | 51.00% | 1,454,000 |
11 West 34th Street (2) | Private Investor / Wharton Properties | 30.00% | 30.00% | 17,150 |
280 Park Avenue | Vornado Realty Trust | 50.00% | 50.00% | 1,219,158 |
1552-1560 Broadway (2) (4) | Wharton Properties | 50.00% | 50.00% | 57,718 |
10 East 53rd Street | Canadian Pension Plan Investment Board | 55.00% | 55.00% | 354,300 |
650 Fifth Avenue (2) (5) | Wharton Properties | 50.00% | 50.00% | 69,214 |
11 Madison Avenue | PGIM Real Estate | 60.00% | 60.00% | 2,314,000 |
One Vanderbilt Avenue | National Pension Service of Korea / Hines Interest LP | 71.01% | 71.01% | 1,657,198 |
Worldwide Plaza (2) | RXR Realty / New York REIT | 24.95% | 24.95% | 2,048,725 |
1515 Broadway | Allianz Real Estate of America | 56.87% | 56.87% | 1,750,000 |
2 Herald Square (2) (6) | Israeli Institutional Investor | 51.00% | 51.00% | 369,000 |
115 Spring Street (2) | Private Investor | 51.00% | 51.00% | 5,218 |
15 Beekman (7) | A fund managed by Meritz Alternative Investment Management | 20.00% | 20.00% | 221,884 |
85 Fifth Avenue | Wells Fargo | 36.27% | 36.27% | 12,946 |
One Madison Avenue (8) | National Pension Service of Korea / Hines Interest LP / International Investor | 25.50% | 25.50% | 1,048,700 |
220 East 42nd Street | A fund managed by Meritz Alternative Investment Management | 51.00% | 51.00% | 1,135,000 |
450 Park Avenue (9) | Korean Institutional Investor / Israeli Institutional Investor | 50.10% | 25.10% | 337,000 |
5 Times Square (2) | RXR Realty led investment group | 31.55% | 31.55% | 1,131,735 |
245 Park Avenue (10) | U.S. Affiliate of Mori Trust Co., Ltd | 50.10% | 50.10% | 1,782,793 |
625 Madison Avenue (11) | Private Investor | 90.43% | 90.43% | 563,000 |

(1)Ownership interest and economic interest represent the Company's interests in the joint venture as of December 31, 2023. Changes in ownership or economic interests within the current year are disclosed in the notes below.
(2)Included in the Company's alternative strategy portfolio.
(3)In January 2024, together with its joint venture partner, the Company closed on the sale of the retail condominium at 717 Fifth Avenue for total consideration of $963.0 million.
(4)The joint venture owns a long-term leasehold interest in the retail space and certain other spaces at 1560 Broadway, which is adjacent to 1552 Broadway. In December 2023, following an assessment of the investment for recoverability, the Company recorded a charge of $8.1 million, which is included in Depreciable real estate reserves and impairments in the consolidated statements of operations.
(5)The joint venture owns a long-term leasehold interest in the retail space at 650 Fifth Avenue.
96

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
(6)In December 2023, following an assessment of the property and the investment for recoverability, the Company recorded a charge of $101.7 million, which is included in Depreciable real estate reserves and impairments in the consolidated statements of operations. In January 2024, the Company closed on the acquisition of interests in the joint venture that owns the leasehold interest for no consideration, which increases the Company's interest in the joint venture to 95.0%. In addition, the joint venture entered into an agreement to satisfy the existing $182.5 million mortgage on the property for a net payment of $7.0 million, which closed in February 2024.
(7)In 2020, the Company formed a joint venture, which then entered into a long-term sublease with the Company.
(8)In 2020, the Company admitted partners to the One Madison Avenue development project, which resulted in the Company no longer retaining a controlling interest in the entity, as defined in ASC 810, and deconsolidation of our remaining 50.5% interest. We recorded our investment at fair value, which resulted in the recognition of a fair value adjustment of $187.5 million. The fair value of our investment was determined by the terms of the joint venture agreement governing the capitalization of the project. In 2021, the Company admitted an additional partner to the development project with the partner's indirect ownership in the joint venture totaling 25.0%. The transaction did not meet sale accounting under ASC 860 and, as a result, was treated as a secured borrowing for accounting purposes and is included in Other liabilities in our consolidated balance sheets at December 31, 2023 and 2022.
(9)The 50.1% ownership interest reflected in this table is comprised of our 25.1% economic interest and a 25.0% economic interest held by a third-party. The third-party's economic interest is held within a joint venture that we consolidate and recognize in Noncontrolling interests in other partnerships on our consolidated balance sheet. An additional third-party owns the remaining 49.9% economic interest in the property.
(10)In June 2023, the Company sold a 49.9% interest, which resulted in the Company no longer retaining a controlling interest in the entity, as defined in ASC 810, and deconsolidation of the 50.1% interest we retained. We recorded our investment at fair value which resulted in the recognition of a fair value adjustment of ($17.0 million) during the year ended December 31, 2023. The fair value of our investment was determined by the terms of the joint venture agreement.
(11)In September 2023, following a UCC foreclosure, the Company converted its previous mezzanine debt investments in the fee interest to a 90.43% ownership interest. See Note 5, "Debt and Preferred Equity Investments." In December 2023, together with its joint venture, the Company entered into a contract to sell the fee ownership in the property. In connection with this contract, the Company recorded a charge of $23.1 million, which is included in Depreciable real estate reserves and impairments in the consolidated statements of operations. This transaction is expected to close in the first quarter of 2024.
Disposition of Joint Venture Interests or Properties
The following table summarizes the investments in unconsolidated joint ventures sold during the years ended December 31, 2023, 2022, and 2021:

Property |  | Ownership Interest Sold |  | Disposition Date |  | Gross Asset Valuation (in millions) |  | (Loss) Gain on Sale (in millions) (1) (2)
21 East 66th Street |  | 32.28% |  | December 2023 |  | $ | 40.6 |  |  | $ | (12.7) |
121 Greene Street |  | 50.00% |  | February 2023 |  | 14.0 |  |  | (0.3) |
Stonehenge Portfolio |  | Various |  | April 2022 |  | 1.0 |  |  | — |
400 East 57th Street (3) |  | 41.00% |  | September 2021 |  | 133.5 |  |  | (1.0) |
605 West 42nd Street - Sky |  | 20.00% |  | June 2021 |  | 858.1 |  |  | 8.9 |
55 West 46th Street - Tower 46 |  | 25.00% |  | March 2021 |  | 275.0 |  |  | (15.2) |
885 Third Avenue (4) |  | N/A |  | January 2021 |  | N/A |  | N/A

(1)Represents the Company's share of the gain or loss
(2)For the years ended December 31, 2023 and December 31, 2021, the (losses) gains on sale are net of $2.0 million and $1.4 million, respectively, of employee compensation accrued in connection with the realization of the investment dispositions. There was no amount accrued for employee compensation in the year ended December 31, 2022. Additionally, amounts do not include adjustments for expenses recorded in subsequent periods.
(3)In connection with our agreement to sell the property in April 2021, we recorded a charge of $5.7 million, which is included in Depreciable real estate reserves and impairments in the consolidated statements of operations.
(4)In January 2021, pursuant to the partnership documents, certain participating rights of the common member expired. As a result, it was determined that we are the primary beneficiary of the VIE and the investment was consolidated in our financial statements. See Note 3, "Property Acquisitions."
Joint Venture Mortgages and Other Loans Payable
We generally finance our joint ventures with non-recourse debt. In certain cases we may provide guarantees or master leases, which terminate upon the satisfaction of specified circumstances or repayment of the underlying loans. The mortgage notes and other loans payable collateralized by the respective joint venture properties and assignment of leases as of December 31, 2023 and 2022, respectively, are as follows (dollars in thousands):
97

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023

|  |  |  |  |  |  |  |  |  | Principal Outstanding |  | Principal Outstanding
|  | Economic |  | Current Maturity | Final Maturity |  | Interest |  | December 31, 2023 |  | December 31, 2022
Property |  | Interest (1) |  | Date | Date (2) |  | Rate (3) |  | Gross |  | SLG Share |  | Gross |  | SLG Share
Fixed Rate Debt: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
717 Fifth Avenue (4)(5) |  | 10.92 | % |  | July 2022 (5) | July 2022 (5) |  |  | 5.02% |  | $ | 655,328 |  |  | $ | 71,536 |  |  | $ | 655,328 |  |  | $ | 71,536 |
650 Fifth Avenue (4) |  | 50.00 | % |  | October 2023 (6) | January 2024 (6) |  |  | 5.45% |  | 65,000 |  |  | 32,500 |  |  | 65,000 |  |  | 32,500 |
220 East 42nd Street |  | 51.00 | % |  | June 2024 | June 2025 |  |  | 5.86% |  | 505,412 |  |  | 257,760 |  |  | 510,000 |  |  | 260,100 |
5 Times Square (4) |  | 31.55 | % |  | September 2024 | September 2026 |  |  | 7.13% |  | 477,783 |  |  | 150,740 |  |  | 400,000 |  |  | 126,200 |
10 East 53rd Street |  | 55.00 | % |  | February 2025 | February 2025 |  |  | 5.45% |  | 220,000 |  |  | 121,000 |  |  | 220,000 |  |  | 121,000 |
1515 Broadway |  | 56.87 | % |  | March 2025 | March 2025 |  |  | 3.93% |  | 762,002 |  |  | 433,344 |  |  | 782,321 |  |  | 444,898 |
115 Spring Street (4) |  | 51.00 | % |  | March 2025 | March 2025 |  |  | 5.50% |  | 65,550 |  |  | 33,431 |  |  | — |  |  | — |
450 Park Avenue |  | 25.10 | % |  | June 2025 | June 2027 |  |  | 6.10% |  | 271,394 |  |  | 68,120 |  |  | 267,000 |  |  | 67,017 |
11 Madison Avenue |  | 60.00 | % |  | September 2025 | September 2025 |  |  | 3.84% |  | 1,400,000 |  |  | 840,000 |  |  | 1,400,000 |  |  | 840,000 |
One Madison Avenue (7) |  | 25.50 | % |  | November 2025 | November 2026 |  |  | 3.59% |  | 733,103 |  |  | 186,941 |  |  | 467,008 |  |  | 119,087 |
800 Third Avenue |  | 60.52 | % |  | February 2026 | February 2026 |  |  | 3.37% |  | 177,000 |  |  | 107,120 |  |  | 177,000 |  |  | 107,120 |
919 Third Avenue |  | 51.00 | % |  | April 2026 | April 2028 |  |  | 6.11% |  | 500,000 |  |  | 255,000 |  |  | 500,000 |  |  | 255,000 |
625 Madison Avenue (8) |  | 90.43 | % |  | December 2026 | December 2026 |  |  | 5.11% |  | 199,987 |  |  | 180,848 |  |  | — |  |  | — |
245 Park Avenue |  | 50.10 | % |  | June 2027 | June 2027 |  |  | 4.30% |  | 1,768,000 |  |  | 885,768 |  |  | — |  |  | — |
Worldwide Plaza (4) |  | 24.95 | % |  | November 2027 | November 2027 |  |  | 3.98% |  | 1,200,000 |  |  | 299,400 |  |  | 1,200,000 |  |  | 299,400 |
One Vanderbilt Avenue |  | 71.01 | % |  | July 2031 | July 2031 |  |  | 2.95% |  | 3,000,000 |  |  | 2,130,300 |  |  | 3,000,000 |  |  | 2,130,300 |
280 Park Avenue |  |  |  |  |  |  |  |  |  | — |  |  | — |  |  | 1,200,000 |  |  | 600,000 |
21 East 66th Street |  |  |  |  |  |  |  |  |  | — |  |  | — |  |  | 12,000 |  |  | 3,874 |
Total fixed rate debt |  |  |  |  |  |  |  | $ | 12,000,559 |  |  | $ | 6,053,808 |  |  | $ | 10,855,657 |  |  | $ | 5,478,032 |
Floating Rate Debt: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
11 West 34th Street (4) |  | 30.00 | % |  | February 2023 (9) | February 2023 (9) |  | L+ | 1.45% |  | $ | 23,000 |  |  | $ | 6,900 |  |  | $ | 23,000 |  |  | $ | 6,900 |
650 Fifth Avenue (4) |  | 50.00 | % |  | October 2023 (6) | January 2024 (6) |  | S+ | 2.25% |  | 210,000 |  |  | 105,000 |  |  | 210,000 |  |  | 105,000 |
2 Herald Square (4)(10) |  | 51.00 | % |  | November 2023(10) | November 2023(10) |  | S+ | 2.06% |  | 182,500 |  |  | 93,075 |  |  | 182,500 |  |  | 93,075 |
100 Park Avenue |  | 49.90 | % |  | January 2024 (11) | December 2025 |  | S+ | 2.36% |  | 360,000 |  |  | 179,640 |  |  | 360,000 |  |  | 179,640 |
15 Beekman (12) |  | 20.00 | % |  | January 2024 (13) | July 2025 |  | S+ | 1.61% |  | 124,137 |  |  | 24,827 |  |  | 86,738 |  |  | 17,348 |
1552 Broadway (4) |  | 50.00 | % |  | February 2024 | February 2024 |  | S+ | 2.75% |  | 193,133 |  |  | 96,567 |  |  | 193,132 |  |  | 96,566 |
5 Times Square (4) |  | 31.55 | % |  | September 2024 | September 2026 |  | S+ | 5.65% |  | 610,010 |  |  | 192,458 |  |  | 495,924 |  |  | 156,464 |
280 Park Avenue |  | 50.00 | % |  | September 2024 | September 2024 |  | S+ | 2.03% |  | 1,200,000 |  |  | 600,000 |  |  | — |  |  | — |
21 East 66th Street |  |  |  |  |  |  |  |  |  | — |  |  | — |  |  | 586 |  |  | 188 |
115 Spring Street |  |  |  |  |  |  |  |  |  | — |  |  | — |  |  | 65,550 |  |  | 33,431 |
121 Greene Street |  |  |  |  |  |  |  |  |  | — |  |  | — |  |  | 12,550 |  |  | 6,275 |
Total floating rate debt |  |  |  |  |  |  |  | $ | 2,902,780 |  |  | $ | 1,298,467 |  |  | $ | 1,629,980 |  |  | $ | 694,887 |
Total joint venture mortgages and other loans payable |  |  |  |  | $ | 14,903,339 |  |  | $ | 7,352,275 |  |  | $ | 12,485,637 |  |  | $ | 6,172,919 |
Deferred financing costs, net |  |  |  |  | (104,062) |  |  | (54,865) |  |  | (136,683) |  |  | (66,910) |
Total joint venture mortgages and other loans payable, net |  |  |  |  | $ | 14,799,277 |  |  | $ | 7,297,410 |  |  | $ | 12,348,954 |  |  | $ | 6,106,009 |

(1)Economic interest represents the Company's interests in the joint venture as of December 31, 2023. Changes in ownership or economic interests, if any, within the current year are disclosed in the notes to the investment in unconsolidated joint ventures table above.
(2)Reflects exercise of all available options. The ability to exercise extension options may be subject to certain conditions, including meeting tests based on the operating performance of the property.
(3)Interest rates as of December 31, 2023, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated spread over Term SOFR ("S").
(4)Included in the Company's alternative strategy portfolio.
(5)The asset was sold and associated debt repaid in January 2024.
(6)In January 2024, the maturity date of the loan was extended by two months to March 2024.
98

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
(7)The loan is a $1.25 billion construction facility with an initial term of five years with one, one year extension option. Advances under the loan are subject to costs incurred. In conjunction with the loan, the Company provided partial guarantees for interest and principal payments, the amounts of which are based on certain construction milestones and operating metrics. In July 2023, the facility was modified, which will allow the partnership to utilize the final tranche of the facility for an expanded range of uses, including additional amenities funded by construction cost savings and for hedging activities in contemplation of a permanent financing.
(8)Represents $168.9 million of loan principal and $31.1 million of accrued interest.
(9)The Company's joint venture partner is in discussions with the lender on resolution of the past maturity.
(10)The Company closed on the acquisition of additional interests in the joint venture in January 2024, which increased the Company's interest to 95%. In addition, the joint venture entered into an agreement to satisfy the existing mortgage for a net payment of $7.0 million, which closed in February 2024.
(11)The Company is in discussions with the lender to exercise the available extension option.
(12)This loan is a $125.0 million construction facility. Advances under the loan are subject to costs incurred.
(13)In January 2024, the maturity date of the loan was extended to July 2024.
We are entitled to receive fees for providing management, leasing, construction supervision and asset management services to certain of our joint ventures. We earned $21.1 million, $24.0 million and $19.6 million from these services, net of our ownership share of the joint ventures, for the years ended December 31, 2023, 2022, and 2021, respectively. In addition, we have the ability to earn incentive fees based on the ultimate financial performance of certain of the joint venture properties.
The combined balance sheets for the unconsolidated joint ventures, as of December 31, 2023 and 2022, are as follows (in thousands):

| December 31, 2023 |  | December 31, 2022
Assets (1) |  |  |
Commercial real estate property, net | $ | 18,467,340 |  |  | $ | 15,989,642 |
Cash and restricted cash | 656,038 |  |  | 709,299 |
Tenant and other receivables, related party receivables, and deferred rents receivable | 673,532 |  |  | 601,552 |
Other assets | 2,584,765 |  |  | 2,551,426 |
Total assets | $ | 22,381,675 |  |  | $ | 19,851,919 |
Liabilities and equity (1) |  |  |
Mortgages and other loans payable, net | $ | 14,799,277 |  |  | $ | 12,348,954 |
Deferred revenue | 1,108,180 |  |  | 1,077,901 |
Lease liabilities | 990,276 |  |  | 1,000,356 |
Other liabilities | 447,705 |  |  | 456,537 |
Equity | 5,036,237 |  |  | 4,968,171 |
Total liabilities and equity | $ | 22,381,675 |  |  | $ | 19,851,919 |
Company's investments in unconsolidated joint ventures | $ | 2,983,313 |  |  | $ | 3,190,137 |

(1)As of December 31, 2023, $545.6 million of net unamortized basis differences between the amount at which our investments are carried and our share of equity in net assets of the underlying property will be amortized through equity in net income (loss) from unconsolidated joint ventures over the remaining life of the underlying items having given rise to the differences.
99

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
The combined statements of operations for the unconsolidated joint ventures, from acquisition date through the years ended December 31, 2023, 2022, and 2021 are as follows (unaudited, in thousands):

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Total revenues | $ | 1,525,044 |  |  | $ | 1,339,364 |  |  | $ | 1,228,364 |
Operating expenses | 253,630 |  |  | 240,002 |  |  | 203,332 |
Real estate taxes | 287,462 |  |  | 252,806 |  |  | 225,104 |
Operating lease rent | 29,048 |  |  | 26,152 |  |  | 22,576 |
Interest expense, net of interest income | 574,032 |  |  | 431,865 |  |  | 342,910 |
Amortization of deferred financing costs | 28,157 |  |  | 27,754 |  |  | 31,423 |
Depreciation and amortization | 516,466 |  |  | 465,100 |  |  | 484,130 |
Total expenses | $ | 1,688,795 |  |  | $ | 1,443,679 |  |  | $ | 1,309,475 |
Loss on early extinguishment of debt | — |  |  | (467) |  |  | (2,017) |
Net loss before (loss) gain on sale | $ | (163,751) |  |  | $ | (104,782) |  |  | $ | (83,128) |
Company's equity in net loss from unconsolidated joint ventures | $ | (76,509) |  |  | $ | (57,958) |  |  | $ | (55,402) |

100

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
7. Deferred Costs
Deferred costs as of December 31, 2023 and 2022 consisted of the following (in thousands):

| December 31, 2023 |  | December 31, 2022
Deferred leasing costs | $ | 399,224 |  |  | $ | 407,188 |
Less: accumulated amortization | (287,761) |  |  | (286,031) |
Deferred costs, net | $ | 111,463 |  |  | $ | 121,157 |

8. Mortgages and Other Loans Payable
The mortgages and other loans payable collateralized by the respective properties and assignment of leases or debt investments as of December 31, 2023 and 2022, respectively, were as follows (dollars in thousands):

Property |  | Maturity Date | Final Maturity Date (1) |  | Interest Rate (2) |  | December 31, 2023 |  | December 31, 2022
Fixed Rate Debt: |  |  |  |  |  |  |  |  |  |
420 Lexington Avenue |  | October 2024 | October 2040 |  |  | 3.99% |  | $ | 277,238 |  |  | $ | 283,064 |
100 Church Street |  | June 2025 | June 2027 |  |  | 5.89% |  | 370,000 |  |  | 370,000 |
7 Dey / 185 Broadway |  | November 2025 | November 2026 |  |  | 6.65% |  | 190,148 |  |  | 200,000 |
Landmark Square |  | January 2027 | January 2027 |  |  | 4.90% |  | 100,000 |  |  | 100,000 |
485 Lexington Avenue |  | February 2027 | February 2027 |  |  | 4.25% |  | 450,000 |  |  | 450,000 |
719 Seventh Avenue |  |  |  |  |  |  |  | — |  |  | 50,000 |
245 Park Avenue |  |  |  |  |  |  |  | — |  |  | 1,712,750 |
Total fixed rate debt |  |  |  |  |  |  |  | $ | 1,387,386 |  |  | $ | 3,165,814 |
Floating Rate Debt: |  |  |  |  |  |  |  |  |  |
690 Madison Avenue (3) |  | July 2024 | July 2025 |  | S+ | 0.50% |  | $ | 60,000 |  |  | $ | 60,000 |
719 Seventh Avenue (3) |  | December 2024 | December 2024 |  | S+ | 1.31% |  | 50,000 |  |  | — |
7 Dey / 185 Broadway |  |  |  |  |  |  |  | — |  |  | 10,148 |
Total floating rate debt |  |  |  |  |  |  |  | $ | 110,000 |  |  | $ | 70,148 |
Total mortgages and other loans payable |  |  |  |  |  |  |  | $ | 1,497,386 |  |  | $ | 3,235,962 |
Deferred financing costs, net of amortization |  |  |  |  |  |  |  | (6,067) |  |  | (8,399) |
Total mortgages and other loans payable, net |  |  |  |  |  |  |  | $ | 1,491,319 |  |  | $ | 3,227,563 |

(1)Reflects exercise of all available options. The ability to exercise extension options may be subject to certain tests based on the operating performance of the property.
(2)Interest rate as of December 31, 2023, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated spread over Term SOFR ("S"), unless otherwise specified.
(3)Included in the Company's alternative strategy portfolio.
As of December 31, 2023 and 2022, the gross book value of the properties collateralizing the mortgages and other loans payable was approximately $1.9 billion and $3.8 billion, respectively.
101

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
9. Corporate Indebtedness
2021 Credit Facility
In December 2021, we entered into an amended and restated credit facility, referred to as the 2021 credit facility, that was previously amended by the Company in November 2017, and was originally entered into by the Company in November 2012. As of December 31, 2023, the 2021 credit facility consisted of a $1.25 billion revolving credit facility, a $1.05 billion term loan (or "Term Loan A"), and a $200.0 million term loan (or "Term Loan B") with maturity dates of May 15, 2026, May 15, 2027, and November 21, 2024, respectively. The revolving credit facility has two six-month as-of-right extension options to May 15, 2027. We also have an option, subject to customary conditions, to increase the capacity of the credit facility to $4.5 billion at any time prior to the maturity dates for the revolving credit facility and term loans without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions.
As of December 31, 2023, the 2021 credit facility bore interest at a spread over adjusted Term SOFR plus 10 basis points with an interest period of one or three months, as we may elect, ranging from (i) 72.5 basis points to 140 basis points for loans under the revolving credit facility, (ii) 80 basis points to 160 basis points for loans under Term Loan A, and (iii) 85 basis points to 165 basis points for loans under Term Loan B, in each case based on the credit rating assigned to the senior unsecured long term indebtedness of the Company. In instances where there are either only two ratings available or where there are more than two and the difference between them is one rating category, the applicable rating shall be the highest rating. In instances where there are more than two ratings and the difference between the highest and the lowest is two or more rating categories, then the applicable rating used is the average of the highest two, rounded down if the average is not a recognized category.
As of December 31, 2023, the applicable spread over adjusted Term SOFR plus 10 basis points for the 2021 credit facility was 140 basis points for the revolving credit facility, 160 basis points for Term Loan A, and 165 basis points for Term Loan B. We are required to pay quarterly in arrears a 12.5 to 30 basis point facility fee on the total commitments under the revolving credit facility based on the credit rating assigned to the senior unsecured long-term indebtedness of the Company. As of December 31, 2023, the facility fee was 30 basis points.
As of December 31, 2023, we had $2.0 million of outstanding letters of credit, $560.0 million drawn under the revolving credit facility and $1.25 billion outstanding under the term loan facilities, with total undrawn capacity of $688.0 million under the 2021 credit facility. As of December 31, 2023 and December 31, 2022, the revolving credit facility had a carrying value of $554.8 million and $443.2 million, respectively, net of deferred financing costs. As of December 31, 2023 and December 31, 2022, the term loan facilities had a carrying value of $1.2 billion and $1.2 billion, respectively, net of deferred financing costs.
The Company and the Operating Partnership are borrowers jointly and severally obligated under the 2021 credit facility.
The 2021 credit facility includes certain restrictions and covenants (see Restrictive Covenants below).
2022 Term Loan
In October 2022, we entered into a term loan agreement, referred to as the 2022 term loan. The 2022 term loan was repaid in full in September 2023. The 2022 term loan consisted of a $425.0 million term loan with a maturity date of October 6, 2023. The 2022 term loan had one six-month as-of-right extension option to April 6, 2024. We also had an option, subject to customary conditions, to increase the capacity of the 2022 term loan to $500.0 million on or before January 7, 2023 without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions. In January 2023, the 2022 term loan was increased by $25.0 million to $425.0 million.
The 2022 term loan bore interest at a spread over adjusted Term SOFR plus 10 basis points, ranging from 100 basis points to 180 basis points, in each case based on the credit rating assigned to the senior unsecured long-term indebtedness of the Company. In instances where there were either only two ratings available or where there was more than two and the difference between them was one rating category, the applicable rating was the highest rating. In instances where there were more than two ratings and the difference between the highest and the lowest were two or more rating categories, then the applicable rating used was the average of the highest two, rounded down if the average was not a recognized category. As of December 31, 2022, the 2022 term loan had a carrying value of $398.2 million, net of deferred financing costs.
102

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Senior Unsecured Notes
The following table sets forth our senior unsecured notes and other related disclosures as of December 31, 2023 and 2022, respectively, by scheduled maturity date (dollars in thousands):

|  | December 31, 2023 |  | December 31, 2022 |  |  |  |  |  |  |
Issuance |  | Unpaid Principal Balance |  | Accreted Balance |  | Accreted Balance |  | Interest Rate (1) |  | Initial Term (in Years) |  | Maturity Date
December 17, 2015 (2) |  | $ | 100,000 |  |  | $ | 100,000 |  |  | $ | 100,000 |  |  |  | 4.27 | % |  | 10 |  | December 2025
|  | $ | 100,000 |  |  | $ | 100,000 |  |  | $ | 100,000 |  |  |  |  |  |  |  |
Deferred financing costs, net |  | — |  |  | (205) |  |  | (308) |  |  |  |  |  |  |  |
|  | $ | 100,000 |  |  | $ | 99,795 |  |  | $ | 99,692 |  |  |  |  |  |  |  |

(1)Interest rate as of December 31, 2023.
(2)Issued by the Company and the Operating Partnership as co-obligors in a private placement.
Restrictive Covenants
The terms of the 2021 credit facility and our senior unsecured notes include certain restrictions and covenants which may limit, among other things, our ability to pay dividends, make certain types of investments, incur additional indebtedness, incur liens and enter into negative pledge agreements and dispose of assets, and which require compliance with financial ratios relating to the maximum ratio of total indebtedness to total asset value, a minimum ratio of EBITDA to fixed charges, a maximum ratio of secured indebtedness to total asset value and a maximum ratio of unsecured indebtedness to unencumbered asset value. The dividend restriction referred to above provides that, we will not during any time when a default is continuing, make distributions with respect to common stock or other equity interests, except to enable the Company to continue to qualify as a REIT for Federal income tax purposes. As of December 31, 2023 and 2022, we were in compliance with all such covenants.
Junior Subordinated Deferrable Interest Debentures
In June 2005, the Company and the Operating Partnership issued $100.0 million in unsecured trust preferred securities through a newly formed trust, SL Green Capital Trust I, or the Trust, which is a wholly-owned subsidiary of the Operating Partnership. The securities mature in 2035 and bear interest at a floating rate of 26 basis points over the three-month Term SOFR. Interest payments may be deferred for a period of up to eight consecutive quarters if the Operating Partnership exercises its right to defer such payments. The Trust preferred securities are redeemable at the option of the Operating Partnership, in whole or in part, with no prepayment premium. We do not consolidate the Trust even though it is a variable interest entity as we are not the primary beneficiary. Because the Trust is not consolidated, we have recorded the debt on our consolidated balance sheets and the related payments are classified as interest expense.
Principal Maturities
Combined aggregate principal maturities of mortgages and other loans payable, the 2021 credit facility, trust preferred securities, senior unsecured notes and our share of joint venture debt as of December 31, 2023, including as-of-right extension options, were as follows (in thousands):

| Scheduled Amortization |  | Principal |  | Revolving Credit Facility |  | Unsecured Term Loans |  | Trust Preferred Securities |  | Senior Unsecured Notes |  | Total |  | Company's Share of Joint Venture Debt
2024 | $ | 4,488 |  |  | $ | 382,750 |  |  | $ | — |  |  | $ | 200,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 587,238 |  |  | $ | 1,822,978 |
2025 | — |  |  | 370,000 |  |  | — |  |  | — |  |  | — |  |  | 100,000 |  |  | 470,000 |  |  | 1,670,861 |
2026 | — |  |  | 190,148 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 190,148 |  |  | 542,968 |
2027 | — |  |  | 550,000 |  |  | 560,000 |  |  | 1,050,000 |  |  | — |  |  | — |  |  | 2,160,000 |  |  | 1,185,168 |
2028 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Thereafter | — |  |  | — |  |  | — |  |  | — |  |  | 100,000 |  |  | — |  |  | 100,000 |  |  | 2,130,300 |
Total | $ | 4,488 |  |  | $ | 1,492,898 |  |  | $ | 560,000 |  |  | $ | 1,250,000 |  |  | $ | 100,000 |  |  | $ | 100,000 |  |  | $ | 3,507,386 |  |  | $ | 7,352,275 |

103

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands):

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Interest expense before capitalized interest | $ | 228,840 |  |  | $ | 166,493 |  |  | $ | 145,197 |
Interest on financing leases | 4,446 |  |  | 4,555 |  |  | 5,448 |
Interest capitalized | (95,980) |  |  | (82,444) |  |  | (78,365) |
Amortization of discount on assumed debt | 2,842 |  |  | 1,855 |  |  | — |
Interest income | (3,034) |  |  | (986) |  |  | (1,389) |
Interest expense, net | $ | 137,114 |  |  | $ | 89,473 |  |  | $ | 70,891 |

10. Related Party Transactions
Cleaning/ Security/ Messenger and Restoration Services
Prior to 2023, Alliance Building Services, or Alliance, and its affiliates, which provide services to certain properties owned by us, were previously partially owned by Gary Green, a son of Stephen L. Green, who serves as a member and as the chairman emeritus of our Board of Directors. Alliance’s affiliates include First Quality Maintenance, L.P., or First Quality, Classic Security LLC, Bright Star Couriers LLC and Onyx Restoration Works, and provide cleaning, extermination, security, messenger, and restoration services, respectively. In addition, First Quality has the non-exclusive opportunity to provide cleaning and related services to individual tenants at our properties on a basis separately negotiated with any tenant seeking such additional services. The Service Corporation has entered into an arrangement with Alliance whereby it will receive a profit participation above a certain threshold for services provided by Alliance to certain tenants at certain buildings above the base services specified in their lease agreements.
Income earned from the profit participation prior to 2023, which is included in Other income on the consolidated statements of operations, was $1.4 million and $1.7 million for the years ended December 31, 2022 and 2021, respectively. We also recorded expenses, inclusive of capitalized expenses, of $8.6 million and $14.0 million for these services (excluding services provided directly to tenants) for the years ended December 31, 2022 and 2021, respectively.
One Vanderbilt Avenue Investment
Our Chairman and CEO, Marc Holliday, and our former President, Andrew Mathias, made investments in our One Vanderbilt project (inclusive of the property and SUMMIT One Vanderbilt), which entitles Mr. Holliday and Mr. Mathias to receive approximately 1.27% and 0.85%, respectively, on account of the property and 1.92% and 1.28%, respectively, on account of SUMMIT One Vanderbilt, of any profits realized by the Company from its One Vanderbilt project in excess of the Company's capital contributions. Mr. Holliday and Mr. Mathias paid $1.4 million and $1.0 million, respectively, which equaled the fair market value of the interests acquired as of the date the investment agreements were entered into as determined by an independent third party appraisal that we obtained.
Messrs. Holliday and Mathias have the right to tender their interests in the project upon stabilization (50% within three years after stabilization and 100% three years or more after stabilization). In addition, the agreement calls for us to repurchase these interests in the event of a sale of One Vanderbilt or a transactional change of control of the Company. We also have the right to repurchase these interests on the 7-year anniversary of the stabilization of the project or upon the occurrence of certain separation events prior to the stabilization of the project relating to each of Messrs. Holliday’s and Mathias’s continued service with us. The price paid upon a tender of the interests will equal the liquidation value of the interests at the time, with the value being based on the project's sale price, if applicable, or fair market value as determined by an independent third party appraiser. In 2022, stabilization of the property (but not SUMMIT One Vanderbilt) was achieved. Therefore, Messrs. Holiday and Mathias exercised their rights to tender 50% of their interests in the property (but not SUMMIT One Vanderbilt) for liquidation values of $17.9 million and $11.9 million, respectively, which were paid in July 2022.
104

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
One Vanderbilt Avenue Leases
In November 2018, we entered into a lease agreement with the One Vanderbilt Avenue joint venture covering certain floors at the property. In March 2021, the lease commenced and we relocated our corporate headquarters to the leased space. For the years ended December 31, 2023 and 2022 we recorded $3.0 million and $3.0 million, respectively, of rent expense under the lease. Additionally, in June 2021, we, through a consolidated subsidiary, entered into a lease agreement with the One Vanderbilt Avenue joint venture for SUMMIT One Vanderbilt, which commenced operations in October 2021. For the year ended December 31, 2023, we recorded $38.9 million of rent expense under the lease, including percentage rent, of which $26.2 million was recognized as income as a component of Equity in net loss from unconsolidated joint ventures in our consolidated statements of operations. For the year ended December 31, 2022, we recorded $33.0 million of rent expense under the lease, including percentage rent, of which $22.8 million was recognized as income as a component of Equity in net loss from unconsolidated joint ventures in our consolidated statements of operations. See Note 20, "Commitments and Contingencies."
Other
We are entitled to receive fees for providing management, leasing, construction supervision, and asset management services to certain of our joint ventures as further described in Note 6, "Investments in Unconsolidated Joint Ventures." Amounts due from joint ventures and related parties as of December 31, 2023 and 2022 consisted of the following (in thousands):

| December 31, 2023 |  | December 31, 2022
Due from joint ventures | $ | 10,603 |  |  | $ | 26,812 |
Other | 1,565 |  |  | 540 |
Related party receivables | $ | 12,168 |  |  | $ | 27,352 |

11. Noncontrolling Interests on the Company's Consolidated Financial Statements
Noncontrolling interests represent the common and preferred units of limited partnership interest in the Operating Partnership not held by the Company as well as third party equity interests in our other consolidated subsidiaries. Noncontrolling interests in the Operating Partnership are shown in the mezzanine equity while the noncontrolling interests in our other consolidated subsidiaries are shown in the equity section of the Company’s consolidated financial statements.
Common Units of Limited Partnership Interest in the Operating Partnership
As of December 31, 2023 and 2022, the noncontrolling interest unit holders owned 5.75%, or 3,949,448 units, and 5.39%, or 3,670,343 units, of the Operating Partnership, respectively. As of December 31, 2023, 3,949,448 shares of our common stock were reserved for issuance upon the redemption of units of limited partnership interest of the Operating Partnership.
Noncontrolling interests in the Operating Partnership is recorded at the greater of its cost basis or fair market value based on the closing stock price of our common stock at the end of the reporting period.
Below is a summary of the activity relating to the noncontrolling interests in the Operating Partnership for the years ended December 31, 2023 and 2022 (in thousands):

| December 31, 2023 |  | December 31, 2022
Balance at beginning of period | $ | 269,993 |  |  | $ | 344,252 |
Distributions | (14,779) |  |  | (16,272) |
Issuance of common units | 25,365 |  |  | 22,855 |
Redemption and conversion of common units | (18,589) |  |  | (40,901) |
Net loss | (37,465) |  |  | (5,794) |
Accumulated other comprehensive income allocation | (1,960) |  |  | 5,827 |
Fair value adjustment | 15,486 |  |  | (39,974) |
Balance at end of period | $ | 238,051 |  |  | $ | 269,993 |

105

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Preferred Units of Limited Partnership Interest in the Operating Partnership
Below is a summary of the preferred units of limited partnership interest in the Operating Partnership as of December 31, 2023:

Issuance |  | Stated Distribution Rate |  | Number of Units Authorized |  | Number of Units Issued |  | Number of Units Outstanding |  | Annual Dividend Per Unit(1) |  | Liquidation Preference Per Unit(2) |  | Conversion Price Per Unit(3) |  | Date of Issuance
Series A (4) |  | 5.00 | % |  | 109,161 |  |  | 109,161 |  |  | 109,161 |  |  | $ | 50.0000 |  |  | $ | 1,000.00 |  |  | $ | — |  |  | August 2015
Series F |  | 7.00 | % |  | 60 |  |  | 60 |  |  | 60 |  |  | 70.0000 |  |  | 1,000.00 |  |  | 29.12 |  |  | January 2007
Series K |  | 3.50 | % |  | 700,000 |  |  | 563,954 |  |  | 341,677 |  |  | 0.8750 |  |  | 25.00 |  |  | 134.67 |  |  | August 2014
Series L |  | 4.00 | % |  | 500,000 |  |  | 378,634 |  |  | 372,634 |  |  | 1.0000 |  |  | 25.00 |  |  | — |  |  | August 2014
Series R |  | 3.50 | % |  | 400,000 |  |  | 400,000 |  |  | 400,000 |  |  | 0.8750 |  |  | 25.00 |  |  | 154.89 |  |  | August 2015
Series S |  | 4.00 | % |  | 1,077,280 |  |  | 1,077,280 |  |  | 1,077,280 |  |  | 1.0000 |  |  | 25.00 |  |  | — |  |  | August 2015
Series V (5) |  | 5.00 | % |  | 40,000 |  |  | 40,000 |  |  | 40,000 |  |  | 1.2500 |  |  | 25.00 |  |  | — |  |  | May 2019
Series W (6) |  | (6) |  |  | 1 |  |  | 1 |  |  | 1 |  |  | (6) |  |  | (6) |  |  | (6) |  |  | January 2020

(1)Dividends are cumulative, subject to certain provisions.
(2)Units are redeemable at any time at par for cash at the option of the unit holder unless otherwise specified.
(3)If applicable, units are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) the amount shown in the table.
(4)Issued through a consolidated subsidiary. The units are convertible on a one-for-one basis, into the Series B Preferred Units of limited partnership interest, or the Subsidiary Series B Preferred Units. The Subsidiary Series B Preferred Units can be converted at any time, after July 15, 2024 at the option of the unitholder, into a number of common stock equal to 6.71348 shares of common stock for each Subsidiary Series B Preferred Unit. As such, no Subsidiary Series B Preferred Units have been issued as of December 31, 2023.
(5)The Series V Preferred Units are redeemable at any time after January 1, 2025 at par for cash at the option of the unit holder.
(6)The Series W preferred unit was issued in January 2020 in exchange for the then-outstanding Series O preferred unit. The holder of the Series W preferred unit is entitled to quarterly dividends in an amount calculated as (i) 1,350 multiplied by (ii) the current distribution per common unit of limited partnership in SL Green Operating Partnership. The holder has the right to require the Operating Partnership to repurchase the Series W unit for cash, or convert the Series W unit for Class B units, in each case at a price that is determined based on the closing price of the Company's common stock at the time such right is exercised. The unit's liquidation preference is the fair market value of the unit plus accrued distributions at the time of a liquidation event.
Below is a summary of the activity relating to the preferred units in the Operating Partnership for the years ended December 31, 2023 and 2022 (in thousands):

| December 31, 2023 |  | December 31, 2022
Balance at beginning of period | $ | 177,943 |  |  | $ | 196,075 |
Issuance of preferred units | — |  |  | — |
Redemption of preferred units | (11,700) |  |  | (17,967) |
Dividends paid on preferred units | (6,271) |  |  | (6,198) |
Accrued dividends on preferred units | 6,529 |  |  | 6,033 |
Balance at end of period | $ | 166,501 |  |  | $ | 177,943 |

12. Stockholders’ Equity of the Company
Common Stock
Our authorized capital stock consists of 260,000,000 shares, $0.01 par value per share, consisting of 160,000,000 shares of common stock, $0.01 par value per share, 75,000,000 shares of excess stock, at $0.01 par value per share, and 25,000,000 shares of preferred stock, par value $0.01 per share. As of December 31, 2023, 64,726,253 shares of common stock and no shares of excess stock were issued and outstanding.
106

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Share Repurchase Program
In August 2016, our Board of Directors approved a $1.0 billion share repurchase program under which we can buy shares of our common stock. The Board of Directors has since authorized five separate $500.0 million increases to the size of the share repurchase program in the fourth quarter of 2017, second quarter of 2018, fourth quarter of 2018, fourth quarter of 2019, and fourth quarter of 2020 bringing the total program size to $3.5 billion.
The following table summarizes share repurchases executed under the program, excluding the redemption of OP units, for the years ended December 31, 2023, 2022 and 2021 as follows:

Period |  | Shares repurchased |  | Average price paid per share |  | Cumulative number of shares repurchased as part of the repurchase plan or programs
Year ended 2021 |  | 4,474,649 |  | $75.44 |  | 34,136,627
Year ended 2022 |  | 1,971,092 |  | $76.69 |  | 36,107,719
Year ended 2023 |  | — |  | $— |  | 36,107,719

Perpetual Preferred Stock
We have 9,200,000 shares of our 6.50% Series I Cumulative Redeemable Preferred Stock, or the Series I Preferred Stock, outstanding with a mandatory liquidation preference of $25.00 per share. The Series I Preferred stockholders receive annual dividends of $1.625 per share paid on a quarterly basis and dividends are cumulative, subject to certain provisions. We are entitled to redeem the Series I Preferred Stock at any time, in whole or from time to time in part, at par for cash. In August 2012, we received $221.9 million in net proceeds from the issuance of the Series I Preferred Stock, which were recorded net of underwriters' discount and issuance costs, and contributed the net proceeds to the Operating Partnership in exchange for 9,200,000 units of 6.50% Series I Cumulative Redeemable Preferred Units of limited partnership interest, or the Series I Preferred Units.
Dividend Reinvestment and Stock Purchase Plan ("DRSPP")
In February 2021, the Company filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRSPP, which automatically became effective upon filing. The Company registered 3,500,000 shares of our common stock under the DRSPP. The DRSPP commenced on September 24, 2001.
The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the years ended December 31, 2023, 2022, and 2021, respectively (dollars in thousands):

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Shares of common stock issued | 17,180 |  |  | 10,839 |  |  | 10,387 |
Dividend reinvestments/stock purchases under the DRSPP | $ | 525 |  |  | $ | 525 |  |  | $ | 738 |

Earnings per Share
We use the two-class method of computing earnings per share (“EPS”), which is an earnings allocation formula that determines EPS for common stock and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPS is computed by dividing the income available to common stockholders by the weighted-average number of common stock shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur from share equivalent activity.
107

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
SL Green's earnings per share for the years ended December 31, 2023, 2022, and 2021 are computed as follows (in thousands):

| Year Ended December 31,
Numerator | 2023 |  | 2022 |  | 2021
Basic Earnings: |  |  |  |  |
(Loss) income attributable to SL Green common stockholders | $ | (579,509) |  |  | $ | (93,024) |  |  | $ | 434,804 |
Less: distributed earnings allocated to participating securities | (2,655) |  |  | (2,219) |  |  | (2,398) |
Less: undistributed earnings allocated to participating securities | — |  |  | — |  |  | (192) |
Net (loss) income attributable to SL Green common stockholders (numerator for basic earnings per share) | $ | (582,164) |  |  | $ | (95,243) |  |  | $ | 432,214 |
Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares | — |  |  | — |  |  | 2,039 |
Add back: undistributed earnings allocated to participating securities | — |  |  | — |  |  | 192 |
Add back: effect of dilutive securities (redemption of units to common shares) | (37,465) |  |  | (5,794) |  |  | 25,457 |
(Loss) income attributable to SL Green common stockholders (numerator for diluted earnings per share) | $ | (619,629) |  |  | $ | (101,037) |  |  | $ | 459,902 |

| Year Ended December 31,
Denominator | 2023 |  | 2022 |  | 2021
Basic Shares: |  |  |  |  |
Weighted average common stock outstanding | 63,809 |  |  | 63,917 |  |  | 65,740 |
Effect of Dilutive Securities: |  |  |  |  |
Operating Partnership units redeemable for common shares | 4,163 |  |  | 4,012 |  |  | 3,987 |
Stock-based compensation plans | — |  |  | — |  |  | 705 |
Contingently issuable shares | — |  |  | — |  |  | 337 |
Diluted weighted average common stock outstanding | 67,972 |  |  | 67,929 |  |  | 70,769 |

The Company has excluded 1,273,417 common stock equivalents from the calculation of diluted shares outstanding for the year ended December 31, 2023. The Company has excluded 1,682,236 and 948,017 of common stock equivalents from the calculation of diluted shares outstanding for the years ended December 31, 2022 and 2021, respectively.
13. Partners' Capital of the Operating Partnership
The Company is the sole managing general partner of the Operating Partnership and as of December 31, 2023 owned 64,726,253 general and limited partnership interests in the Operating Partnership and 9,200,000 Series I Preferred Units. Partnership interests in the Operating Partnership are denominated as “common units of limited partnership interest” (also referred to as “OP Units”) or “preferred units of limited partnership interest” (also referred to as “Preferred Units”). All references to OP Units and Preferred Units outstanding exclude such units held by the Company. A holder of an OP Unit may present such OP Unit to the Operating Partnership for redemption at any time (subject to restrictions agreed upon at the issuance of OP Units to particular holders that may restrict such right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, the Operating Partnership must redeem such OP Unit in exchange for the cash equal to the then value of a share of common stock of the Company, except that the Company may, at its election, in lieu of cash redemption, acquire such OP Unit for one share of common stock. Because the number of shares of common stock outstanding at all times equals the number of OP Units that the Company owns, one share of common stock is generally the economic equivalent of one OP Unit, and the quarterly distribution that may be paid to the holder of an OP Unit equals the quarterly dividend that may be paid to the holder of a share of common stock. Each series of Preferred Units makes a distribution that is set in accordance with an amendment to the partnership agreement of the Operating Partnership. Preferred Units may also be convertible into OP Units at the election of the holder thereof or the Company, subject to the terms of such Preferred Units.
Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions.
108

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Limited Partner Units
As of December 31, 2023, limited partners other than SL Green owned 5.75%, or 3,949,448 common units, of the Operating Partnership.
Preferred Units
Preferred units not owned by SL Green are further described in Note 11, “Noncontrolling Interests on the Company’s Consolidated Financial Statements - Preferred Units of Limited Partnership Interest in the Operating Partnership.”
Earnings per Unit
The Operating Partnership's earnings per unit for the years ended December 31, 2023, 2022, and 2021 respectively are computed as follows (in thousands):

| Year Ended December 31,
Numerator | 2023 |  | 2022 |  | 2021
Basic Earnings: |  |  |  |  |
Net (loss) income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) | $ | (616,974) |  |  | $ | (98,818) |  |  | $ | 460,261 |
Less: distributed earnings allocated to participating securities | (2,655) |  |  | (2,219) |  |  | (2,398) |
Less: undistributed earnings allocated to participating securities | — |  |  | — |  |  | (192) |
Net (loss) income attributable to SLGOP common unitholders (numerator for basic earnings per unit) | $ | (619,629) |  |  | $ | (101,037) |  |  | $ | 457,671 |
Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares | — |  |  | — |  |  | 2,590 |
(Loss) income attributable to SLGOP common unitholders | $ | (619,629) |  |  | $ | (101,037) |  |  | $ | 460,261 |

| Year Ended December 31,
Denominator | 2023 |  | 2022 |  | 2021
Basic units: |  |  |  |  |
Weighted average common units outstanding | 67,972 |  |  | 67,929 |  |  | 69,667 |
Effect of Dilutive Securities: |  |  |  |  |
Stock-based compensation plans | — |  |  | — |  |  | 765 |
Contingently issuable units | — |  |  | — |  |  | 337 |
Diluted weighted average common units outstanding | 67,972 |  |  | 67,929 |  |  | 70,769 |

The Operating Partnership has excluded 1,273,417 common unit equivalents from the diluted units outstanding for the years ended December 31, 2023. The Operating Partnership has excluded 1,682,236 and 948,017 common unit equivalents from the diluted units outstanding for the years ended December 31, 2022 and 2021, respectively.
14. Share-based Compensation
We have share-based employee and director compensation plans. Our employees are compensated through the Operating Partnership. Under each plan, whenever the Company issues common or preferred stock, the Operating Partnership issues an equivalent number of units of limited partnership interest of a corresponding class to the Company.
109

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
The Fifth Amended and Restated 2005 Stock Option and Incentive Plan, or the 2005 Plan, was approved by the Company's Board of Directors in April 2022 and its stockholders in June 2022 at the Company's annual meeting of stockholders. The 2005 Plan authorizes the issuance of stock options, stock appreciation rights, unrestricted and restricted stock, phantom shares, dividend equivalent rights, cash-based awards and other equity-based awards. Subject to adjustments upon certain corporate transactions or events, awards with respect to up to a maximum of 32,210,000 fungible units may be granted under the 2005 Plan. Currently, different types of awards count against the limit on the number of fungible units differently, with (1) full-value awards (i.e., those that deliver the full value of the award upon vesting, such as restricted stock) counting as 2.59 Fungible Units per share subject to such awards, (2) stock options, stock appreciation rights and other awards that do not deliver full value and expire five years from the date of grant counting as 0.84 fungible units per share subject to such awards, and (3) all other awards (e.g., 10-year stock options) counting as 1.0 fungible units per share subject to such awards. Awards granted under the 2005 Plan prior to the approval of the fifth amendment and restatement in June 2022 continue to count against the fungible unit limit based on the ratios that were in effect at the time such awards were granted, which may be different than the current ratios. As a result, depending on the types of awards issued, the 2005 Plan may result in the issuance of more or less than 32,210,000 shares. If a stock option or other award granted under the 2005 Plan expires or terminates, the common stock subject to any portion of the award that expires or terminates without having been exercised or paid, as the case may be, will again become available for the issuance of additional awards. Shares of our common stock distributed under the 2005 Plan may be treasury shares or authorized but unissued shares. Currently, unless the 2005 Plan has been previously terminated by the Company's Board of Directors, new awards may be granted under the 2005 Plan until June 1, 2032, which is the tenth anniversary of the date that the 2005 Plan was most recently approved by the Company's stockholders. As of December 31, 2023, 3.9 million fungible units were available for issuance under the 2005 Plan after reserving for shares underlying outstanding restricted stock units, phantom stock units granted pursuant to our Non-Employee Directors' Deferral Program and LTIP Units.
Stock Options and Class O LTIP Units
Options are granted with an exercise price at the fair market value of the Company's common stock on the date of grant and, subject to employment, generally expire five years or ten years from the date of grant, are not transferable other than on death, and generally vest in one year to five years commencing one year from the date of grant. We have also granted Class O LTIP Units, which are a class of LTIP Units in the Operating Partnership structured to provide economics similar to those of stock options. Class O LTIP Units, once vested, may be converted, at the election of the holder, into a number of common units of the Operating Partnership per Class O LTIP Unit determined by the increase in value of a share of the Company’s common stock at the time of conversion over a participation threshold, which equals the fair market value of a share of the Company’s common stock at the time of grant. Class O LTIP Units are entitled to distributions, subject to vesting, equal per unit to 10% of the per unit distributions paid with respect to the common units of the Operating Partnership.
The fair value of each stock option or LTIP Unit granted is estimated on the date of grant using the Black-Scholes option pricing model based on historical information. There were no options granted during the years ended December 31, 2023, 2022, and 2021.
A summary of the status of the Company's stock options as of December 31, 2023, 2022, and 2021 and changes during the years ended December 31, 2023, 2022, and 2021 are as follows:

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
| Options Outstanding |  | Weighted Average Exercise Price |  | Options Outstanding |  | Weighted Average Exercise Price |  | Options Outstanding |  | Weighted Average Exercise Price
Balance at beginning of year | 313,480 |  |  | $ | 97.59 |  |  | 394,089 |  |  | $ | 100.56 |  |  | 761,686 |  |  | $ | 105.76 |
Exercised | — |  |  | — |  |  | — |  |  | — |  |  | (11,314) |  |  | 72.30 |
Lapsed or canceled | (197,500) |  |  | 84.14 |  |  | (80,609) |  |  | 112.14 |  |  | (356,283) |  |  | 112.56 |
Balance at end of year | 115,980 |  |  | $ | 103.52 |  |  | 313,480 |  |  | $ | 97.59 |  |  | 394,089 |  |  | $ | 100.56 |
Options exercisable at end of year | 115,980 |  |  | $ | 103.52 |  |  | 313,480 |  |  | $ | 97.59 |  |  | 394,089 |  |  | $ | 100.56 |

The remaining weighted average contractual life of the options outstanding was 3.0 years and the remaining average contractual life of the options exercisable was 3.0 years.
110

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
During the years ended December 31, 2023, 2022, and 2021, we recognized no compensation expense related to options. As of December 31, 2023, there was no unrecognized compensation cost related to unvested stock options.
Restricted Shares
Shares are granted to certain employees, including our executives, and vesting occurs upon the completion of a service period or our meeting established financial performance criteria. Vesting occurs at rates ranging from 15% to 35% once performance criteria are reached.
A summary of the Company's restricted stock as of December 31, 2023, 2022, and 2021 and changes during the years ended December 31, 2023, 2022, and 2021 are as follows:

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Balance at beginning of year | 3,758,174 |  |  | 3,459,363 |  |  | 3,337,545 |
Granted | 337,350 |  |  | 314,995 |  |  | 141,515 |
Canceled | (6,350) |  |  | (16,184) |  |  | (19,697) |
Balance at end of year | 4,089,174 |  |  | 3,758,174 |  |  | 3,459,363 |
Vested during the year | 147,915 |  |  | 118,255 |  |  | 122,759 |
Compensation expense recorded | $ | 7,766,055 |  |  | $ | 10,133,905 |  |  | $ | 8,497,054 |
Total fair value of restricted stock granted during the year | $ | 15,789,540 |  |  | $ | 16,804,931 |  |  | $ | 9,214,531 |

The fair value of restricted stock that vested during the years ended December 31, 2023, 2022, and 2021 was $10.2 million, $9.7 million and $11.3 million, respectively. As of December 31, 2023, there was $20.2 million of total unrecognized compensation cost related to restricted stock, which is expected to be recognized over a weighted average period of 2.3 years.
We granted LTIP Units, which include bonus, time-based and performance-based awards, with a fair value of $38.1 million and $45.0 million during the years ended December 31, 2023 and 2022, respectively. The grant date fair value of the LTIP Unit awards was calculated in accordance with ASC 718. A third-party consultant determined that the fair value of the LTIP Units has a discount to our common stock price. The discount was calculated by considering the inherent uncertainty that the LTIP Units will reach parity with other common partnership units and the illiquidity due to transfer restrictions. As of December 31, 2023, there was $27.1 million of total unrecognized compensation expense related to the time-based and performance-based awards, which is expected to be recognized over a weighted average period of 1.6 years.
During the years ended December 31, 2023, 2022, and 2021, we recorded compensation expense related to bonus, time-based and performance-based awards of $50.4 million, $43.5 million, and $41.9 million, respectively.
For the years ended December 31, 2023, 2022, and 2021, $1.4 million, $1.8 million, and $2.1 million, respectively, was capitalized to assets associated with compensation expense related to our long-term compensation plans, restricted stock and stock options.
Deferred Compensation Plan for Directors
Under our Non-Employee Director's Deferral Program, which commenced July 2004, the Company's non-employee directors may elect to defer up to 100% of their annual retainer fee, chairman fees, meeting fees and annual stock grant. Unless otherwise elected by a participant, fees deferred under the program shall be credited in the form of phantom stock units. The program provides that a director's phantom stock units generally will be settled in an equal number of shares of common stock upon the earlier of (i) the January 1 coincident with or the next following such director's termination of service from the Board of Directors or (ii) a change in control by us, as defined by the program. Phantom stock units are credited to each non-employee director quarterly using the closing price of our common stock on the first business day of the respective quarter. Each participating non-employee director is also credited with dividend equivalents or phantom stock units based on the dividend rate for each quarter, which are either paid in cash currently or credited to the director’s account as additional phantom stock units.
During the year ended December 31, 2023, 39,302 phantom stock units and 27,739 shares of common stock were issued to our Board of Directors. We recorded compensation expense of $2.7 million during the year ended December 31, 2023 related to the Deferred Compensation Plan. As of December 31, 2023, there were 230,295 phantom stock units outstanding pursuant to our Non-Employee Director's Deferral Program.
111

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Employee Stock Purchase Plan
In 2007, the Company's Board of Directors adopted the 2008 Employee Stock Purchase Plan, or ESPP, to provide equity-based incentives to eligible employees. The ESPP is intended to qualify as an "employee stock purchase plan" under Section 423 of the Code, and has been adopted by the board to enable our eligible employees to purchase the Company's shares of common stock through payroll deductions. The ESPP became effective on January 1, 2008 with a maximum of 500,000 shares of the common stock available for issuance, subject to adjustment upon a merger, reorganization, stock split or other similar corporate change. The Company filed a registration statement on Form S-8 with the SEC with respect to the ESPP. The common stock is offered for purchase through a series of successive offering periods. Each offering period will be three months in duration and will begin on the first day of each calendar quarter, with the first offering period having commenced on January 1, 2008. The ESPP provides for eligible employees to purchase the common stock at a purchase price equal to 85% of the lesser of (1) the market value of the common stock on the first day of the offering period or (2) the market value of the common stock on the last day of the offering period. The ESPP was approved by our stockholders at our 2008 annual meeting of stockholders. As of December 31, 2023, 224,159 shares of our common stock had been issued under the ESPP.
15. Accumulated Other Comprehensive Income
The following tables set forth the changes in accumulated other comprehensive income by component as of December 31, 2023, 2022 and 2021 (in thousands):

| Net unrealized gain (loss) on derivative instruments (1) |  | SL Green’s share of joint venture net unrealized gain (loss) on derivative instruments (2) |  | Net unrealized (loss) gain on marketable securities |  | Total
Balance at December 31, 2020 | $ | (57,415) |  |  | $ | (10,853) |  |  | $ | 1,021 |  |  | $ | (67,247) |
Other comprehensive income (loss) before reclassifications | 14,908 |  |  | (18,015) |  |  | 96 |  |  | (3,011) |
Amounts reclassified from accumulated other comprehensive loss | 16,626 |  |  | 6,874 |  |  | — |  |  | 23,500 |
Balance at December 31, 2021 | (25,881) |  |  | (21,994) |  |  | 1,117 |  |  | (46,758) |
Other comprehensive income (loss) before reclassifications | 78,300 |  |  | 23,405 |  |  | (1,359) |  |  | 100,346 |
Amounts reclassified from accumulated other comprehensive income | (4,619) |  |  | 635 |  |  | — |  |  | (3,984) |
Balance at December 31, 2022 | 47,800 |  |  | 2,046 |  |  | (242) |  |  | 49,604 |
Other comprehensive (loss) income before reclassifications | 17,269 |  |  | 6,950 |  |  | (1,549) |  |  | 22,670 |
Amounts reclassified from accumulated other comprehensive income | (39,717) |  |  | (15,080) |  |  | — |  |  | (54,797) |
Balance at December 31, 2023 | $ | 25,352 |  |  | $ | (6,084) |  |  | $ | (1,791) |  |  | $ | 17,477 |

(1)Amount reclassified from accumulated other comprehensive income is included in interest expense in the respective consolidated statements of operations. As of December 31, 2023 and 2022, the deferred net gains from these terminated hedges, which is included in accumulated other comprehensive income relating to net unrealized gain (loss) on derivative instruments, was ($0.4 million) and ($0.5 million), respectively.
(2)Amount reclassified from accumulated other comprehensive income is included in equity in net loss from unconsolidated joint ventures in the respective consolidated statements of operations.
112

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
16. Fair Value Measurements
We are required to disclose fair value information with regard to certain of our financial instruments, whether or not recognized in the consolidated balance sheets, for which it is practical to estimate fair value. The FASB guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date. We measure and/or disclose the estimated fair value of certain financial assets and liabilities based on a hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity and the reporting entity’s own assumptions about market participant assumptions. This hierarchy consists of three broad levels: Level 1 - quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity can access at the measurement date; Level 2 - inputs other than quoted prices included within Level 1, that are observable for the asset or liability, either directly or indirectly; and Level 3 - unobservable inputs for the asset or liability that are used when little or no market data is available. We follow this hierarchy for our assets and liabilities measured at fair value on a recurring and nonrecurring basis. In instances in which the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level of input that is significant to the fair value measurement in its entirety. Our assessment of the significance of the particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.
The following tables set forth the assets and liabilities that we measure at fair value on a recurring and non-recurring basis by their levels in the fair value hierarchy as of December 31, 2023 and 2022 (in thousands):

| December 31, 2023
| Total |  | Level 1 |  | Level 2 |  | Level 3
Assets: |  |  |  |  |  |  |
Marketable securities available-for-sale | $ | 9,591 |  |  | $ | — |  |  | $ | 9,591 |  |  | $ | — |
Interest rate cap and swap agreements (included in Other assets) | $ | 33,456 |  |  | $ | — |  |  | $ | 33,456 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |
Interest rate cap and swap agreements (included in Other liabilities) | $ | 17,108 |  |  | $ | — |  |  | $ | 17,108 |  |  | $ | — |

| December 31, 2022
| Total |  | Level 1 |  | Level 2 |  | Level 3
Assets: |  |  |  |  |  |  |
Marketable securities available-for-sale | $ | 11,240 |  |  | $ | — |  |  | $ | 11,240 |  |  | $ | — |
Interest rate cap and swap agreements (included in Other assets) | $ | 57,660 |  |  | $ | — |  |  | $ | 57,660 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |
Interest rate cap and swap agreements (included in Other liabilities) | $ | 10,142 |  |  | $ | — |  |  | $ | 10,142 |  |  | $ | — |

We evaluate real estate investments and debt and preferred equity investments, including intangibles, for potential impairment primarily utilizing cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts. All of which are classified as Level 3 inputs.
In June 2023, the Company sold a 49.9% interest in its 245 Park Avenue investment, which resulted in the Company no longer retaining a controlling interest in the entity, as defined in ASC 810, and deconsolidation of the 50.1% interest we retained. We recorded our investment at fair value which resulted in the recognition of a fair value adjustment of ($17.0 million) during the year ended December 31, 2023. The fair value of our investment was determined by the terms of the joint venture agreement.
In September 2022, the Company recorded at fair value the assets acquired and liabilities assumed at 245 Park Avenue. This fair value was determined using a third-party valuation which primarily utilized cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts, all of which are classified as Level 3 inputs.
113

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
Marketable securities classified as Level 1 are derived from quoted prices in active markets. The valuation technique used to measure the fair value of marketable securities classified as Level 2 were valued based on quoted market prices or model driven valuations using the significant inputs derived from or corroborated by observable market data. We do not intend to sell these securities and it is not more likely than not that we will be required to sell the investments before recovery of their amortized cost bases.
The fair value of derivative instruments is based on current market data received from financial sources that trade such instruments and are based on prevailing market data and derived from third party proprietary models based on well-recognized financial principles and reasonable estimates about relevant future market conditions, which are classified as Level 2 inputs.
The financial assets and liabilities that are not measured at fair value on our consolidated balance sheets include cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued expenses, debt and preferred equity investments, mortgages and other loans payable and other secured and unsecured debt. The carrying amount of cash and cash equivalents, restricted cash, accounts receivable, and accounts payable and accrued expenses reported in our consolidated balance sheets approximates fair value due to the short-term nature of these instruments. The fair value of debt and preferred equity investments, which is classified as Level 3, is estimated by discounting the future cash flows using current interest rates at which similar loans with the same maturities would be made to borrowers with similar credit ratings. The fair value of borrowings, which is classified as Level 3, is estimated by discounting the contractual cash flows of each debt instrument to their present value using adjusted market interest rates, which is provided by a third-party specialist.
The following table provides the carrying value and fair value of these financial instruments as of December 31, 2023 and December 31, 2022 (in thousands):

| December 31, 2023 |  | December 31, 2022
| Carrying Value (1) |  | Fair Value |  | Carrying Value (1) |  | Fair Value
Debt and preferred equity investments | $ | 346,745 |  |  | (2) |  | $ | 623,280 |  |  | (2)
Fixed rate debt | $ | 3,237,386 |  |  | $ | 3,184,338 |  |  | $ | 5,015,814 |  |  | $ | 4,784,691 |
Variable rate debt (3) | 270,000 |  |  | 268,787 |  |  | 520,148 |  |  | 519,669 |
Total debt | $ | 3,507,386 |  |  | $ | 3,453,125 |  |  | $ | 5,535,962 |  |  | $ | 5,304,360 |

(1)Amounts exclude net deferred financing costs.
(2)As of December 31, 2023, debt and preferred equity investments had an estimated fair value of approximately $0.3 billion. As of December 31, 2022, debt and preferred equity investments had an estimated fair value ranging between $0.6 billion and $0.6 billion.
(3)As of December 31, 2023, variable rate debt with a carrying value of $110.0 million and fair value of $108.6 million is included in the Company's alternative strategy portfolio.
Disclosures regarding fair value of financial instruments was based on pertinent information available to us as of December 31, 2023 and 2022. Such amounts have not been comprehensively revalued for purposes of these financial statements since that date and current estimates of fair value may differ significantly from the amounts presented herein.
17. Financial Instruments: Derivatives and Hedging
In the normal course of business, we use a variety of commonly used derivative instruments, including, but not limited to, interest rate swaps, caps, collars and floors, to manage, or hedge interest rate risk. We hedge our exposure to variability in future cash flows for forecasted transactions in addition to anticipated future interest payments on existing debt. We recognize all derivatives on the balance sheet at fair value. Derivatives that are not hedges are adjusted to fair value through earnings. If a derivative is a hedge, depending on the nature of the hedge, changes in the fair value of the derivative will either be offset against the change in fair value of the hedge asset, liability, or firm commitment through earnings, or recognized in other comprehensive income (loss) until the hedged item is recognized in earnings. Reported net income and equity may increase or decrease prospectively, depending on future levels of interest rates and other variables affecting the fair values of derivative instruments and hedged items, but will have no effect on cash flows. Currently, all of our designated derivative instruments are effective hedging instruments.
The following table summarizes the notional value at inception and fair value of our consolidated derivative financial instruments as of December 31, 2023 based on Level 2 information. The notional value is an indication of the extent of our involvement in these instruments at that time, but does not represent exposure to credit, interest rate or market risks (dollars in thousands).
114

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023

| Notional Value |  | Strike Rate |  | Effective Date |  | Expiration Date |  | Balance Sheet Location |  | Fair Value
Interest Rate Swap | 150,000 |  |  | 2.600 | % |  | December 2021 |  | January 2024 |  | Other Assets |  | $ | 11 |
Interest Rate Swap | 200,000 |  |  | 4.490 | % |  | November 2022 |  | January 2024 |  | Other Assets |  | 5 |
Interest Rate Swap | 200,000 |  |  | 4.411 | % |  | November 2022 |  | January 2024 |  | Other Assets |  | 5 |
Interest Rate Cap | 370,000 |  |  | 3.250 | % |  | June 2023 |  | June 2024 |  | Other Assets |  | 3,158 |
Interest Rate Cap | 370,000 |  |  | 3.250 | % |  | June 2023 |  | June 2024 |  | Other Liabilities |  | (3,145) |
Interest Rate Swap | 150,000 |  |  | 2.621 | % |  | December 2021 |  | January 2026 |  | Other Assets |  | 4,011 |
Interest Rate Swap | 200,000 |  |  | 2.662 | % |  | December 2021 |  | January 2026 |  | Other Assets |  | 5,196 |
Interest Rate Swap | 100,000 |  |  | 2.903 | % |  | February 2023 |  | February 2027 |  | Other Assets |  | 2,281 |
Interest Rate Swap | 100,000 |  |  | 2.733 | % |  | February 2023 |  | February 2027 |  | Other Assets |  | 2,775 |
Interest Rate Swap | 50,000 |  |  | 2.463 | % |  | February 2023 |  | February 2027 |  | Other Assets |  | 1,781 |
Interest Rate Swap | 200,000 |  |  | 2.591 | % |  | February 2023 |  | February 2027 |  | Other Assets |  | 6,378 |
Interest Rate Swap | 300,000 |  |  | 2.866 | % |  | July 2023 |  | May 2027 |  | Other Assets |  | 7,306 |
Interest Rate Swap | 150,000 |  |  | 3.524 | % |  | January 2024 |  | May 2027 |  | Other Assets |  | 549 |
Interest Rate Swap | 370,000 |  |  | 3.888 | % |  | November 2022 |  | June 2027 |  | Other Liabilities |  | (3,044) |
Interest Rate Swap | 300,000 |  |  | 4.487 | % |  | November 2024 |  | November 2027 |  | Other Liabilities |  | (10,273) |
Interest Rate Swap | 100,000 |  |  | 3.756 | % |  | January 2023 |  | January 2028 |  | Other Liabilities |  | (646) |
|  |  |  |  |  |  |  |  |  |  | $ | 16,348 |

During the year ended December 31, 2023, we recorded a loss of $10.4 million based on the changes in the fair value of an interest rate cap we sold and a forward-starting interest rate swap, which is included in Purchase price and other fair value adjustments in the consolidated statements of operations. During the year ended December 31, 2022, we recorded a loss of $1.7 million based on the changes in the fair value of an interest rate cap we sold. No interest rate caps were sold or forward-starting interest rate swaps entered into during the year ended December 31, 2021. During the years ended December 31, 2023, 2022, and 2021, we recorded losses of $0.2 million, $0.3 million, and $0.0 million, respectively, on the changes in the fair value, which is included in interest expense in the consolidated statements of operations.
Certain agreements the Company has with each of its derivative counterparties contain a provision where if the Company defaults on any of its indebtedness, then the Company could also be declared in default on its derivative obligations. As of December 31, 2023, the fair value of derivatives in a net liability position, including accrued interest but excluding any adjustment for nonperformance risk related to these agreements was $17.5 million. As of December 31, 2023, the Company was not required to post any collateral related to these agreements and was not in breach of any agreement provisions. If the Company had breached any of these provisions, it could have been required to settle its obligations under the agreements at their aggregate termination value of $18.3 million as of December 31, 2023.
Gains and losses on terminated hedges are included in accumulated other comprehensive income, and are recognized into earnings over the term of the related obligation. Over time, the realized and unrealized gains and losses held in accumulated other comprehensive income will be reclassified into earnings as an adjustment to interest expense in the same periods in which the hedged interest payments affect earnings. We estimate that ($32.5 million) of the current balance held in accumulated other comprehensive income will be reclassified into interest expense and ($7.6 million) of the portion related to our share of joint venture accumulated other comprehensive income (loss) will be reclassified into equity in net loss from unconsolidated joint ventures within the next 12 months.
The following table presents our derivative financial instruments and our share of our joint ventures' derivative financial instruments that are designated and qualify as hedging instruments on the consolidated statements of operations for the years ended December 31, 2023, 2022, and 2021, respectively (in thousands):
115

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023

|  | Amount of Gain (Loss) Recognized in Other Comprehensive (Loss) Income |  | Location of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income |  | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
|  | Year Ended December 31, |  |  | Year Ended December 31,
Derivative |  | 2023 |  | 2022 |  | 2021 |  |  | 2023 |  | 2022 |  | 2021
Interest Rate Swaps/Caps |  | $ | 18,484 |  |  | $ | 83,162 |  |  | $ | 15,643 |  |  | Interest expense |  | $ | 42,270 |  |  | $ | 4,989 |  |  | $ | (17,602) |
Share of unconsolidated joint ventures' derivative instruments |  | 7,399 |  |  | 24,783 |  |  | (19,400) |  |  | Equity in net loss from unconsolidated joint ventures |  | 16,050 |  |  | (673) |  |  | (7,582) |
|  | $ | 25,883 |  |  | $ | 107,945 |  |  | $ | (3,757) |  |  |  |  | $ | 58,320 |  |  | $ | 4,316 |  |  | $ | (25,184) |

The following table summarizes the notional value at inception and fair value of our joint ventures' derivative financial instruments as of December 31, 2023 based on Level 2 information. The notional value is an indication of the extent of our involvement in these instruments at that time, but does not represent exposure to credit, interest rate or market risks (dollars in thousands).

| Notional Value |  | Strike Rate |  | Effective Date |  | Expiration Date |  | Classification |  | Fair Value
Interest Rate Cap | $ | 220,000 |  |  | 4.000 | % |  | February 2023 |  | February 2024 |  | Asset |  | $ | 318 |
Interest Rate Cap | 484,069 |  |  | 0.490 | % |  | February 2022 |  | May 2024 |  | Asset |  | 8,331 |
Interest Rate Cap | 484,069 |  |  | 0.490 | % |  | February 2022 |  | May 2024 |  | Asset |  | 8,330 |
Interest Rate Cap | 505,412 |  |  | 3.000 | % |  | June 2023 |  | June 2024 |  | Asset |  | 4,948 |
Interest Rate Cap | 272,000 |  |  | 4.000 | % |  | August 2023 |  | August 2024 |  | Asset |  | 1,675 |
Interest Rate Cap | 477,783 |  |  | 3.500 | % |  | September 2023 |  | September 2024 |  | Asset |  | 5,213 |
Interest Rate Cap | 278,161 |  |  | 4.000 | % |  | May 2024 |  | November 2024 |  | Asset |  | 948 |
Interest Rate Cap | 278,161 |  |  | 4.000 | % |  | May 2024 |  | November 2024 |  | Asset |  | 948 |
Interest Rate Swap | 250,000 |  |  | 3.608 | % |  | April 2023 |  | February 2026 |  | Asset |  | 1,819 |
Interest Rate Swap | 250,000 |  |  | 3.608 | % |  | April 2023 |  | February 2026 |  | Asset |  | 1,818 |
Interest Rate Swap | 177,000 |  |  | 1.555 | % |  | December 2022 |  | February 2026 |  | Asset |  | 8,686 |
|  |  |  |  |  |  |  |  |  |  | $ | 43,034 |

18. Lease Income
The Operating Partnership is the lessor and the sublessor to tenants under operating and sales-type leases. The minimum rental amounts due under the leases are generally subject to scheduled fixed increases or adjustments. The leases generally also require that the tenants reimburse us for increases in certain operating costs and real estate taxes above their base year costs.
Future minimum rents to be received over the next five years and thereafter for operating leases in effect at December 31, 2023 are as follows (in thousands):

2024 | $ | 496,311 |
2025 | 470,673 |
2026 | 426,247 |
2027 | 371,117 |
2028 | 316,789 |
Thereafter | 1,339,758 |
| $ | 3,420,895 |

The components of lease income from operating leases in effect at December 31, 2023, 2022 and 2021 were as follows (in thousands):
116

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Fixed lease payments | $ | 589,469 |  |  | $ | 583,107 |  |  | $ | 608,793 |
Variable lease payments | 79,641 |  |  | 82,676 |  |  | 73,543 |
Total lease payments (1) | $ | 669,110 |  |  | $ | 665,783 |  |  | $ | 682,336 |
Amortization of acquired above and below-market leases | 14,225 |  |  | 5,717 |  |  | (4,160) |
Total rental revenue | $ | 683,335 |  |  | $ | 671,500 |  |  | $ | 678,176 |

(1)Amounts include $196.5 million and $222.1 million of sublease income for the years ended December 31, 2023 and 2022, respectively.
The table below summarizes our investment in sales-type leases as of December 31, 2023:

Property | Year of Current Expiration | Year of Final Expiration (1)
15 Beekman (2) | 2089 | 2089

(1)Reflects exercise of all available renewal options.
(2)In August 2020, the Company formed a joint venture, which then entered into a long-term sublease with the Company for the building at 15 Beekman. See Note 6, "Investments in Unconsolidated Joint Ventures."
Future minimum lease payments to be received over the next five years and thereafter for our sales-type leases with initial terms in excess of one year as of December 31, 2023 are as follows (in thousands):

| Sales-type leases
2024 | $ | 3,180 |
2025 | 3,228 |
2026 | 3,276 |
2027 | 3,325 |
2028 | 3,375 |
Thereafter | 196,794 |
Total minimum lease payments | $ | 213,178 |
Amount representing interest | (107,544) |
Investment in sales-type leases (1) | $ | 105,634 |

(1)This amount is included in Other assets in our consolidated balance sheets.
The components of lease income from sales-type leases during the years ended December 31, 2023, 2022 and 2021 were as follows (in thousands):

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Interest income (1) | $ | 4,444 |  |  | $ | 4,389 |  |  | $ | 4,422 |

(1)These amounts are included in Other income in our consolidated statements of operations.
117

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
19. Benefit Plans
The building employees are covered by multi-employer defined benefit pension plans and post-retirement health and welfare plans. We participate in the Building Service 32BJ, or Union, Pension Plan and Health Plan. The Pension Plan is a multi-employer, non-contributory defined benefit pension plan that was established under the terms of collective bargaining agreements between the Service Employees International Union, Local 32BJ, the Realty Advisory Board on Labor Relations, Inc. and certain other employees. This Pension Plan is administered by a joint board of trustees consisting of union trustees and employer trustees and operates under employer identification number 13-1879376. The Pension Plan year runs from July 1 to June 30. Employers contribute to the Pension Plan at a fixed rate on behalf of each covered employee. Separate actuarial information regarding such pension plans is not made available to the contributing employers by the union administrators or trustees, since the plans do not maintain separate records for each reporting unit. However, on September 28, 2021, September 28, 2022 and September 28, 2023, the actuary certified that for the plan years beginning July 1, 2021, July 1, 2022 and July 1, 2023, the Pension Plan was in critical or endangered status under the Pension Protection Act of 2006. The Pension Plan trustees adopted a rehabilitation plan consistent with this requirement. No surcharges have been paid to the Pension Plan as of December 31, 2023. For the Pension Plan years ended June 30, 2023, 2022 and 2021, the plan received contributions from employers totaling $317.9 million, $305.7 million and $290.1 million, respectively. Our contributions to the Pension Plan represent less than 5.0% of total contributions to the plan.
The Health Plan was established under the terms of collective bargaining agreements between the Union, the Realty Advisory Board on Labor Relations, Inc. and certain other employers. The Health Plan provides health and other benefits to eligible participants employed in the building service industry who are covered under collective bargaining agreements, or other written agreements, with the Union. The Health Plan is administered by a Board of Trustees with equal representation by the employers and the Union and operates under employer identification number 13-2928869. The Health Plan receives contributions in accordance with collective bargaining agreements or participation agreements. Generally, these agreements provide that the employers contribute to the Health Plan at a fixed rate on behalf of each covered employee. For the Health Plan years ended, June 30, 2023, 2022 and 2021, the plan received contributions from employers totaling $1.9 billion, $1.6 billion and $1.5 billion, respectively. Our contributions to the Health Plan represent less than 5.0% of total contributions to the plan.
Contributions we made to the multi-employer plans for the years ended December 31, 2023, 2022 and 2021 are included in the table below (in thousands):

| Year Ended December 31,
Benefit Plan | 2023 |  | 2022 |  | 2021
Pension Plan | $ | 2,111 |  |  | $ | 1,952 |  |  | $ | 1,994 |
Health Plan | 7,191 |  |  | 6,386 |  |  | 6,333 |
Other plans | 789 |  |  | 807 |  |  | 849 |
Total plan contributions | $ | 10,091 |  |  | $ | 9,145 |  |  | $ | 9,176 |

401(K) Plan
In August 1997, we implemented a 401(K) Savings/Retirement Plan, or the 401(K) Plan, to cover eligible employees of ours, and any designated affiliate. The 401(K) Plan permits eligible employees to defer up to 15% of their annual compensation, subject to certain limitations imposed by the Code. The employees' elective deferrals are immediately vested and non-forfeitable upon contribution to the 401(K) Plan. During 2003, we amended our 401(K) Plan to provide for discretionary matching contributions only. For 2023, 2022 and 2021, a matching contribution equal to 100% of the first 4% of annual compensation was made. For the years ended December 31, 2023, 2022 and 2021, we made matching contributions of $1.8 million, $1.5 million, and $1.5 million, respectively.
118

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
20. Commitments and Contingencies
Legal Proceedings
As of December 31, 2023, the Company and the Operating Partnership were not involved in any material litigation nor, to management's knowledge, was any material litigation threatened against us or our portfolio which if adversely determined could have a material adverse impact on us.
Environmental Matters
Our management believes that the properties are in compliance in all material respects with applicable Federal, state and local ordinances and regulations regarding environmental issues. Management is not aware of any environmental liability that it believes would have a materially adverse impact on our financial position, results of operations or cash flows. Management is unaware of any instances in which it would incur significant environmental cost if any of our properties were sold.
Employment Agreements
We have entered into employment agreements with certain executives, which expire between January 2025 and January 2026. The minimum cash-based compensation associated with these employment agreements, which is comprised only of base salary, totals $2.4 million for 2024.
Insurance
We maintain “all-risk” property and rental value coverage (including coverage regarding the perils of flood, earthquake and terrorism, excluding nuclear, biological, chemical, and radiological terrorism ("NBCR"), within two property insurance programs and liability insurance. Separate property and liability coverage may be purchased on a stand-alone basis for certain assets, such as development projects. Additionally, one of our captive insurance companies, Belmont Insurance Company, or Belmont, provides coverage for NBCR terrorist acts above a specified trigger. Belmont's retention is reinsured by our other captive insurance company, Ticonderoga Insurance Company ("Ticonderoga"). If Belmont or Ticonderoga are required to pay a claim under our insurance policies, we would ultimately record the loss to the extent of required payments. However, there is no assurance that in the future we will be able to procure coverage at a reasonable cost. Further, if we experience losses that are uninsured or that exceed policy limits, we could lose the capital invested in the damaged properties as well as the anticipated future cash flows from those properties. Additionally, our debt instruments contain customary covenants requiring us to maintain insurance and we could default under our debt instruments if the cost and/or availability of certain types of insurance make it impractical or impossible to comply with such covenants relating to insurance. Belmont and Ticonderoga provide coverage solely on properties owned by the Company or its affiliates.
Furthermore, with respect to certain of our properties, including properties held by joint ventures or subject to triple net leases, insurance coverage is obtained by a third-party and we do not control the coverage. While we may have agreements with such third parties to maintain adequate coverage and we monitor these policies, such coverage ultimately may not be maintained or adequately cover our risk of loss.
Belmont had loss reserves of $3.3 million and $3.1 million as of December 31, 2023 and 2022, respectively. Ticonderoga had no loss reserves as of December 31, 2023 and 2022.
Lease Arrangements
We are a tenant under leases for certain properties, including ground leases. These leases have expirations from 2033 to 2119, or 2043 to 2119 as fully extended. Certain leases offer extension options which we assess against relevant economic factors to determine whether we are reasonably certain of exercising or not exercising the option. Lease payments associated with renewal periods that we are reasonably certain will be exercised, if any, are included in the measurement of the corresponding lease liability and right of use asset.
Certain of our leases are subject to rent resets, generally based on a percentage of the then fair market value, a fixed amount, or a percentage of the preceding rent at specified future dates. Rent resets will be recognized in the periods in which they are incurred. Additionally, certain of our leases are subject to percentage rent arrangements based on thresholds established in the lease agreement, such as percentage of sales at the property. Percentage rents will be recognized in the periods in which they are incurred.
The table below summarizes our current lease arrangements as of December 31, 2023:
119

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023

Property (1) | Year of Current Expiration | Year of Final Expiration (2)
711 Third Avenue (3) | 2033 | 2083
1185 Avenue of the Americas | 2043 | 2043
SL Green Headquarters at One Vanderbilt Avenue (4) | 2043 | 2048
420 Lexington Avenue | 2050 | 2080
SUMMIT One Vanderbilt | 2058 | 2070
15 Beekman (5)(6) | 2119 | 2119

(1)All leases are classified as operating leases unless otherwise specified.
(2)Reflects exercise of all available extension options.
(3)The Company owns 50% of the fee interest.
(4)In March 2021, the Company commenced its lease for its corporate headquarters at One Vanderbilt Avenue. See note 10, "Related Party Transactions."
(5)The Company has an option to purchase the ground lease for a fixed price on a specific date. The lease is classified as a financing lease.
(6)In August 2020, the Company entered into a long-term sublease with an unconsolidated joint venture as part of the capitalization of the 15 Beekman development project. See Note 6, "Investments in Unconsolidated Joint Ventures."
The following is a schedule of future minimum lease payments as evaluated in accordance with ASC 842 for our financing leases and operating leases with initial terms in excess of one year as of December 31, 2023 (in thousands):

| Financing leases |  | Operating leases
2024 | $ | 3,180 |  |  | $ | 53,455 |
2025 | 3,228 |  |  | 53,595 |
2026 | 3,276 |  |  | 53,734 |
2027 | 3,325 |  |  | 53,746 |
2028 | 3,375 |  |  | 54,211 |
Thereafter | 196,794 |  |  | 1,208,864 |
Total minimum lease payments | $ | 213,178 |  |  | $ | 1,477,605 |
Amount representing interest | (107,647) |  |  | — |
Amount discounted using incremental borrowing rate | — |  |  | (649,913) |
Total lease liabilities excluding liabilities related to assets held for sale | $ | 105,531 |  |  | $ | 827,692 |
Total lease liabilities | $ | 105,531 |  |  | $ | 827,692 |

The following table provides lease cost information for the Company's operating leases for the years ended December 31, 2023, 2022 and 2021 (in thousands):

| Year Ended December 31,
Operating Lease Costs | 2023 |  | 2022 |  | 2021
Operating lease costs before capitalized operating lease costs | $ | 29,637 |  |  | $ | 33,773 |  |  | $ | 30,270 |
Operating lease costs capitalized | (2,345) |  |  | (6,830) |  |  | (3,716) |
Operating lease costs, net (1) | $ | 27,292 |  |  | $ | 26,943 |  |  | $ | 26,554 |

(1)This amount is included in Operating lease rent in our consolidated statements of operations.
The following table provides lease cost information for the Company's financing leases for the years ended December 31, 2023, 2022 and 2021 (in thousands):
120

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023

| Year Ended December 31,
Financing Lease Costs | 2023 |  | 2022 |  | 2021
Interest on financing leases before capitalized interest | $ | 4,446 |  |  | $ | 4,555 |  |  | $ | 5,448 |
Interest on financing leases capitalized | — |  |  | — |  |  | — |
Interest on financing leases, net (1) | 4,446 |  |  | 4,555 |  |  | 5,448 |
Amortization of right-of-use assets (2) | — |  |  | — |  |  | 660 |
Financing lease costs, net | $ | 4,446 |  |  | $ | 4,555 |  |  | $ | 6,108 |

(1)These amounts are included in Interest expense, net of interest income in our consolidated statements of operations.
(2)These amounts are included in Depreciation and amortization in our consolidated statements of operations.
As of December 31, 2023, the weighted-average discount rate used to calculate the lease liabilities was 4.46%. As of December 31, 2023, the weighted-average remaining lease term was 28 years, inclusive of purchase options expected to be exercised.
121

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Notes to Consolidated Financial Statements (cont.)
December 31, 2023
21. Segment Information
The Company has three reportable segments, real estate, debt and preferred equity investments, and SUMMIT. In the fourth quarter of 2023, due to quantitative thresholds, SUMMIT was identified as a reportable segment. As such, prior period segment data has been restated to reflect SUMMIT as a reportable segment for comparative purposes.
We evaluate real estate performance and allocate resources based on earnings contributions. The primary sources of revenue are generated from tenant rents, escalations and reimbursement revenue. Real estate property operating expenses consist primarily of security, maintenance, utility costs, insurance, real estate taxes and, at certain properties, ground rent expense. See Note 5, "Debt and Preferred Equity Investments," for additional details on our debt and preferred equity investments. SUMMIT currently operates one location at One Vanderbilt Avenue in midtown Manhattan with the primary source of revenue generated from ticket sales.
Selected consolidated results of operations for the years ended December 31, 2023, 2022, and 2021, and selected asset information as of December 31, 2023 and 2022, regarding our operating segments are as follows (in thousands):

|  | Real Estate |  | SUMMIT |  | Debt and Preferred Equity |  | Total Company
Total revenues |  |  |  |  |  |  |  |
Years ended: |  |  |  |  |  |  |  |
December 31, 2023 |  | $ | 760,745 |  |  | $ | 118,260 |  |  | $ | 34,705 |  |  | $ | 913,710 |
December 31, 2022 |  | 749,293 |  |  | 89,048 |  |  | 81,113 |  |  | 919,454 |
December 31, 2021 |  | 764,659 |  |  | 16,311 |  |  | 80,340 |  |  | 861,310 |
Net (loss) income |  |  |  |  |  |  |  |
Years ended: |  |  |  |  |  |  |  |
December 31, 2023 |  | $ | (612,884) |  |  | $ | 6,101 |  |  | $ | 7,446 |  |  | $ | (599,337) |
December 31, 2022 |  | (128,615) |  |  | (3,668) |  |  | 55,980 |  |  | (76,303) |
December 31, 2021 |  | 413,401 |  |  | (1,008) |  |  | 68,239 |  |  | 480,632 |
Total assets |  |  |  |  |  |  |  |
As of: |  |  |  |  |  |  |  |
December 31, 2023 |  | $ | 8,716,738 |  |  | $ | 464,799 |  |  | $ | 349,644 |  |  | $ | 9,531,181 |
December 31, 2022 |  | 11,265,789 |  |  | 461,629 |  |  | 628,376 |  |  | 12,355,794 |

We allocate loan loss reserves, net of recoveries, and transaction related costs to the debt and preferred equity segment. We do not allocate marketing, general and administrative expenses to the debt and preferred equity segment because that segment does not have dedicated personnel and the use of personnel and resources is dependent on transaction volume between the three segments, which varies between periods. In addition, we base performance on the individual segments prior to allocating marketing, general and administrative expenses. SUMMIT segment incurs its own marketing, general and administrative expenses for its dedicated personnel, which are included in SUMMIT Operator expenses in the consolidated statements of operations. For the years ended, December 31, 2023, 2022, and 2021 marketing, general and administrative expenses totaled $111.4 million, $93.8 million, and $94.9 million respectively. All other expenses, except interest and SUMMIT operator expenses, relate entirely to the real estate assets.
There were no transactions between the above three segments other than the SUMMIT lease with our One Vanderbilt Avenue joint venture, which is part of the real estate segment. See Note 10, "Related Party Transactions."
122

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Schedule III - Real Estate and Accumulated Depreciation
December 31, 2023
(in thousands)

Column A |  | Column B |  | Column C Initial Cost |  | Column D Cost Capitalized Subsequent To Acquisition (1) |  | Column E Gross Amount at Which Carried at Close of Period |  | Column F |  | Column G |  | Column H |  | Column I
Description (2) |  | Encumbrances |  | Land |  | Building & Improvements |  | Land |  | Building & Improvements |  | Land |  | Building & Improvements (3) |  | Total |  | Accumulated Depreciation |  | Date of Construction |  | Date Acquired |  | Life on Which Depreciation is Computed
420 Lexington Ave |  | $ | 277,238 |  |  | $ | — |  |  | $ | 333,499 |  |  | $ | — |  |  | $ | 242,766 |  |  | $ | — |  |  | $ | 576,265 |  |  | $ | 576,265 |  |  | $ | 227,258 |  |  | 1927 |  | 3/1998 |  | Various
711 Third Avenue |  | — |  |  | 19,844 |  |  | 115,769 |  |  | — |  |  | 72,821 |  |  | 19,844 |  |  | 188,590 |  |  | 208,434 |  |  | 91,897 |  |  | 1955 |  | 5/1998 |  | Various
555 W. 57th Street |  | — |  |  | 18,846 |  |  | 140,946 |  |  | — |  |  | 12,521 |  |  | 18,846 |  |  | 153,467 |  |  | 172,313 |  |  | 98,508 |  |  | 1971 |  | 1/1999 |  | Various
461 Fifth Avenue |  | — |  |  | — |  |  | 88,276 |  |  | 28,873 |  |  | 12,680 |  |  | 28,873 |  |  | 100,956 |  |  | 129,829 |  |  | 45,700 |  |  | 1988 |  | 10/2003 |  | Various
750 Third Avenue |  | — |  |  | 51,093 |  |  | 251,523 |  |  | — |  |  | 83,936 |  |  | 51,093 |  |  | 335,459 |  |  | 386,552 |  |  | 112,937 |  |  | 1958 |  | 7/2004 |  | Various
485 Lexington Avenue |  | 450,000 |  |  | 78,282 |  |  | 452,631 |  |  | — |  |  | (15,086) |  |  | 78,282 |  |  | 437,545 |  |  | 515,827 |  |  | 201,735 |  |  | 1956 |  | 12/2004 |  | Various
810 Seventh Avenue |  | — |  |  | 114,077 |  |  | 550,819 |  |  | — |  |  | 5,406 |  |  | 114,077 |  |  | 556,225 |  |  | 670,302 |  |  | 238,462 |  |  | 1970 |  | 1/2007 |  | Various
1185 Avenue of the Americas |  | — |  |  | — |  |  | 791,106 |  |  | — |  |  | 139,416 |  |  | — |  |  | 930,522 |  |  | 930,522 |  |  | 404,093 |  |  | 1969 |  | 1/2007 |  | Various
1350 Avenue of the Americas |  | — |  |  | 90,941 |  |  | 431,517 |  |  | — |  |  | 14,566 |  |  | 90,941 |  |  | 446,083 |  |  | 537,024 |  |  | 196,985 |  |  | 1966 |  | 1/2007 |  | Various
1-6 Landmark Square (4) |  | 100,000 |  |  | 27,852 |  |  | 161,343 |  |  | (6,939) |  |  | (23,245) |  |  | 20,913 |  |  | 138,098 |  |  | 159,011 |  |  | 46,789 |  |  | 1973-1984 |  | 1/2007 |  | Various
7 Landmark Square (4) |  | — |  |  | 1,721 |  |  | 8,417 |  |  | (1,338) |  |  | (6,240) |  |  | 383 |  |  | 2,177 |  |  | 2,560 |  |  | 695 |  |  | 2007 |  | 1/2007 |  | Various
100 Church Street |  | 370,000 |  |  | 34,994 |  |  | 183,932 |  |  | — |  |  | 11,060 |  |  | 34,994 |  |  | 194,992 |  |  | 229,986 |  |  | 78,305 |  |  | 1959 |  | 1/2010 |  | Various
125 Park Avenue |  | — |  |  | 120,900 |  |  | 270,598 |  |  | — |  |  | 23,312 |  |  | 120,900 |  |  | 293,910 |  |  | 414,810 |  |  | 129,990 |  |  | 1923 |  | 10/2010 |  | Various
19 East 65th Street |  | — |  |  | 8,603 |  |  | 2,074 |  |  | — |  |  | 3,345 |  |  | 8,603 |  |  | 5,419 |  |  | 14,022 |  |  | 7 |  |  | 1929 |  | 1/2012 |  | Various
304 Park Avenue |  | — |  |  | 54,489 |  |  | 90,643 |  |  | — |  |  | 9,096 |  |  | 54,489 |  |  | 99,739 |  |  | 154,228 |  |  | 33,134 |  |  | 1930 |  | 6/2012 |  | Various
760 Madison Avenue |  | — |  |  | 284,286 |  |  | 8,314 |  |  | (2,450) |  |  | 187,847 |  |  | 281,836 |  |  | 196,161 |  |  | 477,997 |  |  | 4,991 |  |  | 1996/2012 |  | 7/2014 |  | Various
719 Seventh Avenue (5)(6) |  | 50,000 |  |  | 41,180 |  |  | 46,232 |  |  | — |  |  | (4,720) |  |  | 41,180 |  |  | 41,512 |  |  | 82,692 |  |  | 5,986 |  |  | 1927 |  | 7/2014 |  | Various
110 Greene Street |  | — |  |  | 45,120 |  |  | 228,393 |  |  | — |  |  | 4,578 |  |  | 45,120 |  |  | 232,971 |  |  | 278,091 |  |  | 57,067 |  |  | 1910 |  | 7/2015 |  | Various
7 Dey / 185 Broadway |  | 190,148 |  |  | 45,540 |  |  | 27,865 |  |  | — |  |  | 207,635 |  |  | 45,540 |  |  | 235,500 |  |  | 281,040 |  |  | 12,200 |  |  | 1921 |  | 8/2015 |  | Various
885 Third Avenue (7) |  | — |  |  | 138,444 |  |  | 244,040 |  |  | (138,444) |  |  | (125,747) |  |  | — |  |  | 118,293 |  |  | 118,293 |  |  | 11,040 |  |  | 1986 |  | 7/2020 |  | Various
690 Madison (6) |  | 60,000 |  |  | 13,820 |  |  | 51,732 |  |  | — |  |  | 28 |  |  | 13,820 |  |  | 51,760 |  |  | 65,580 |  |  | 3,863 |  |  | 1879 |  | 9/2021 |  | Various
Other (8) |  | — |  |  | 20,635 |  |  | 16,224 |  |  | 2,302 |  |  | 611,561 |  |  | 22,937 |  |  | 627,785 |  |  | 650,722 |  |  | 33,669 |  |  |  |  |  |  |
Total |  | $ | 1,497,386 |  |  | $ | 1,210,669 |  |  | $ | 4,495,893 |  |  | $ | (117,996) |  |  | $ | 1,467,536 |  |  | $ | 1,092,671 |  |  | $ | 5,963,429 |  |  | $ | 7,056,100 |  |  | $ | 2,035,311 |  |  |  |  |  |  |

(1)Includes depreciable real estate reserves and impairments recorded subsequent to acquisition.
(2)All properties located in New York, New York unless otherwise noted.
(3)Includes right of use lease assets.
(4)Property located in Connecticut.
(5)We own a 75.0% interest in this property.
(6)Property is included in the Company's alternative strategy portfolio.
(7)In December 2022, the Company sold 414,317 square feet of office leasehold condominium units at the property. The Company retained the remaining 218,796 square feet of the building.
(8)Other includes a land development project, tenant improvements of eEmerge, capitalized interest and corporate improvements.
123

Table of Contents
SL Green Realty Corp. and SL Green Operating Partnership, L.P.
Schedule III - Real Estate and Accumulated Depreciation
December 31, 2023
(in thousands)
The changes in real estate for the years ended December 31, 2023, 2022 and 2021 are as follows (in thousands):

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Balance at beginning of year | $ | 9,198,799 |  |  | $ | 7,650,907 |  |  | $ | 7,355,079 |
Property acquisitions | — |  |  | 1,900,042 |  |  | 124,103 |
Improvements | 241,213 |  |  | 335,413 |  |  | 296,876 |
Retirements/disposals/deconsolidation | (2,383,912) |  |  | (687,563) |  |  | (125,151) |
Balance at end of year | $ | 7,056,100 |  |  | $ | 9,198,799 |  |  | $ | 7,650,907 |

The aggregate cost of land, buildings and improvements, before depreciation, for Federal income tax purposes as of December 31, 2023 was $4.4 billion (unaudited).
The changes in accumulated depreciation, exclusive of amounts relating to equipment, autos, and furniture and fixtures, for the years ended December 31, 2023, 2022 and 2021 are as follows (in thousands):

| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Balance at beginning of year | $ | 2,039,554 |  |  | $ | 1,896,199 |  |  | $ | 1,956,077 |
Depreciation for year | 199,576 |  |  | 175,465 |  |  | 174,219 |
Retirements/disposals/deconsolidation | (203,819) |  |  | (32,110) |  |  | (234,097) |
Balance at end of year | $ | 2,035,311 |  |  | $ | 2,039,554 |  |  | $ | 1,896,199 |

124

Table of Contents
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE
None.
125

Table of Contents
ITEM 9A. CONTROLS AND PROCEDURES
SL GREEN REALTY CORP.
Evaluation of Disclosure Controls and Procedures
The Company maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms, and that such information is accumulated and communicated to the Company's management, including the Company's Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure based closely on the definition of "disclosure controls and procedures" in Rule 13a-15(e) of the Exchange Act. Notwithstanding the foregoing, a control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that it will detect or uncover failures within the Company to disclose material information otherwise required to be set forth in our periodic reports. Also, the Company has investments in certain unconsolidated entities. As the Company does not control these entities, its disclosure controls and procedures with respect to such entities are necessarily substantially more limited than those the Company maintains with respect to its consolidated subsidiaries.
As of the end of the period covered by this report, the Company carried out an evaluation, under the supervision and with the participation of the Company's management, including our Chief Executive Officer and our Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures. Based upon that evaluation as of the end of the period covered by this report, the Company's Chief Executive Officer and Chief Financial Officer concluded that its disclosure controls and procedures were effective to give reasonable assurances to the timely collection, evaluation and disclosure of information relating to the Company that would potentially be subject to disclosure under the Exchange Act and the rules and regulations promulgated thereunder.
Management's Report on Internal Control over Financial Reporting
The Company is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Under the supervision and with the participation of the Company's management, including our Chief Executive Officer and Chief Financial Officer, the Company conducted an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2023 based on the framework in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 Framework) (COSO). Based on that evaluation, the Company concluded that its internal control over financial reporting was effective as of December 31, 2023.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree or compliance with the policies or procedures may deteriorate.
The effectiveness of the Company's internal control over financial reporting as of December 31, 2023 has been audited by Ernst & Young LLP, an independent registered public accounting firm, as stated in their report which appears herein.
Changes in Internal Control over Financial Reporting
There have been no significant changes in the Company's internal control over financial reporting during the year ended December 31, 2023 that has materially affected, or is reasonably likely to materially affect, its internal control over financial reporting.
SL GREEN OPERATING PARTNERSHIP, L.P.
Evaluation of Disclosure Controls and Procedures
The Operating Partnership maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in the Operating Partnership's Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to the Operating Partnership's management, including the Chief Executive Officer and Chief Financial Officer of the Operating Partnership's general partner, as appropriate, to allow timely decisions regarding required disclosure based closely on the definition of “disclosure controls and procedures” in Rule 13a-15(e) of the Exchange Act. Notwithstanding the foregoing, a control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that it will detect or uncover failures within the Operating Partnership to disclose material information otherwise required to be set forth in the Operating Partnership's periodic reports. Also, the Operating Partnership has investments in certain unconsolidated entities. As the Operating Partnership does not control these entities, the Operating Partnership's disclosure controls and procedures with respect to such entities are necessarily substantially more limited than those it maintains with respect to its consolidated subsidiaries.
126

Table of Contents
As of the end of the period covered by this report, the Operating Partnership carried out an evaluation, under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer of the Operating Partnership's general partner, of the effectiveness of the design and operation of the Operating Partnership's disclosure controls and procedures. Based upon that evaluation as of the end of the period covered by this report, the Chief Executive Officer and Chief Financial Officer of the Operating Partnership's general partner concluded that the Operating Partnership's disclosure controls and procedures were effective to give reasonable assurances to the timely collection, evaluation and disclosure of information relating to the Operating Partnership that would potentially be subject to disclosure under the Exchange Act and the rules and regulations promulgated thereunder.
Management’s Report on Internal Control over Financial Reporting
The Operating Partnership is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15 (f) and 15d-15 (f). Under the supervision and with the participation of our management, including the Chief Executive Officer and Chief Financial Officer of the Operating Partnership's general partner, the Operating Partnership conducted an evaluation of the effectiveness of its internal control over financial reporting as of December 31, 2023 based on the framework in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 Framework) (COSO). Based on that evaluation, the Operating Partnership concluded that its internal control over financial reporting was effective as of December 31, 2023.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree or compliance with the policies or procedures may deteriorate.
The effectiveness of the Operating Partnership's internal control over financial reporting as of December 31, 2023 has been audited by Ernst & Young LLP, an independent registered public accounting firm, as stated in their report which appears herein.
Changes in Internal Control over Financial Reporting
There have been no significant changes in the Operating Partnership's internal control over financial reporting during the year ended December 31, 2023 that has materially affected, or is reasonably likely to materially affect, its internal control over financial reporting.
127

Table of Contents
Report of Independent Registered Public Accounting Firm
To the Shareholders and the Board of Directors of SL Green Realty Corp.
Opinion on Internal Control Over Financial Reporting
We have audited SL Green Realty Corp.'s internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, SL Green Realty Corp. (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023, based on the COSO criteria.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the 2023 consolidated financial statements of the Company and our report dated February 23, 2024 expressed an unqualified opinion thereon.
Basis for Opinion
The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.
Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
Definition and Limitations of Internal Control Over Financial Reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
/s/ Ernst & Young LLP
New York, New York
February 23, 2024
128

Table of Contents
Report of Independent Registered Public Accounting Firm
To the Partners of SL Green Operating Partnership, L.P.
Opinion on Internal Control Over Financial Reporting
We have audited SL Green Operating Partnership, L.P.'s internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, SL Green Operating Partnership, L.P. (the Operating Partnership) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023, based on the COSO criteria.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the 2023 consolidated financial statements of the Operating Partnership and our report dated February 23, 2024 expressed an unqualified opinion thereon.
Basis for Opinion
The Operating Partnership’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management's Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Operating Partnership's internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Operating Partnership in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.
Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
Definition and Limitations of Internal Control Over Financial Reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
/s/ Ernst & Young LLP
New York, New York
February 23, 2024
129

Table of Contents
ITEM 9B. OTHER INFORMATION
None.
130

Table of Contents
ITEM 9C. DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS
Not applicable.
131

Table of Contents
PART III
ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
The information required by Item 10 will be set forth in our Definitive Proxy Statement for our 2024 Annual Meeting of Stockholders, to be filed pursuant to Regulation 14A under the Securities and Exchange Act of 1934, as amended, on or prior to April 29, 2024, or the 2024 Proxy Statement, and is incorporated herein by reference.
ITEM 11. EXECUTIVE COMPENSATION
The information required by Item 11 will be set forth in the 2024 Proxy Statement and is incorporated herein by reference.
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS
The information required by Item 12 will be set forth in the 2024 Proxy Statement and is incorporated herein by reference.
The following table summarizes information, as of December 31, 2023, relating to our equity compensation plans pursuant to which shares of our common stock or other equity securities may be granted from time to time.

| Number of securities to be issued upon exercise of outstanding options, warrants and rights |  | Weighted average exercise price of outstanding options, warrants and rights |  | Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a)) |
Plan category | (a) |  | (b) |  | (c) |
Equity compensation plans approved by security holders (1) | 4,692,094 |  | (2) | $ | 103.52 |  | (3) | 4,139,076 |  | (4)
Equity compensation plans not approved by security holders | — |  |  | — |  |  | — |  |
Total | 4,692,094 |  |  | $ | 103.52 |  |  | 4,139,076 |  |

(1)Includes our Fifth Amended and Restated 2005 Stock Option and Incentive Plan, Amended 1997 Stock Option and Incentive Plan, as amended, and 2008 Employee Stock Purchase Plan.
(2)Includes (i) 115,980 shares of common stock issuable upon the exercise of outstanding options (115,980 of which are vested and exercisable), (ii) 230,295 phantom stock units that may be settled in shares of common stock (230,295 of which are vested), (iii) 2,990,461 LTIP units that, upon the satisfaction of certain conditions, are convertible into common units, which may be presented to us for redemption and acquired by us for shares of our common stock (1,366,248 of which are vested).
(3)Because there is no exercise price associated with restricted stock units, phantom stock units or LTIP units, these awards are not included in the weighted-average exercise price calculation.
(4)Balance is after reserving for shares underlying outstanding restricted stock units, phantom stock units granted pursuant to our Non-Employee Directors' Deferral Program and LTIP Units. The number of securities remaining available consists of shares remaining available for issuance under our 2008 Employee Stock Purchase Plan and Fifth Amended and Restated 2005 Stock Option and Incentive Plan.
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE
The information required by Item 13 will be set forth under in the 2024 Proxy Statement and is incorporated herein by reference.
ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES
The information regarding principal accountant fees and services and the audit committee's pre-approval policies and procedures required by this Item 14 will be set forth in the 2024 Proxy Statement and is incorporated herein by reference.
132

Table of Contents
PART IV
ITEM 15. EXHIBITS, FINANCIAL STATEMENTS AND SCHEDULES
(a)(1) Consolidated Financial Statements

SL GREEN REALTY CORP. |
Report of Independent Registered Public Accounting Firm | 56
Consolidated Balance Sheets as of December 31, 2023 and 2022 | 59
Consolidated Statements of Operations for the years ended December 31, 2023, 2022 and 2021 | 61
Consolidated Statements of Comprehensive (Loss) Income for the years ended December 31, 2023, 2022 and 2021 | 62
Consolidated Statements of Equity for the years ended December 31, 2023, 2022 and 2021 | 63
Consolidated Statements of Cash Flows for the years ended December 31, 2023, 2022 and 2021 | 64
SL GREEN OPERATING PARTNERSHIP, L.P. |
Report of Independent Registered Public Accounting Firm | 67
Consolidated Balance Sheets as of December 31, 2023 and 2022 | 70
Consolidated Statements of Operations for the years ended December 31, 2023, 2022 and 2021 | 72
Consolidated Statements of Comprehensive (Loss) Income for the years ended December 31, 2023, 2022 and 2021 | 73
Consolidated Statements of Equity for the years ended December 31, 2023, 2022 and 2021 | 74
Consolidated Statements of Cash Flows for the years ended December 31, 2023, 2022 and 2021 | 75
Notes to Consolidated Financial Statements | 78
(a)(2) Financial Statement Schedules |
Schedule III—Real Estate and Accumulated Depreciation as of December 31, 2023 | 123

Schedules other than those listed are omitted as they are not applicable or the required or equivalent information has been included in the financial statements or notes thereto.
(a)(3) In reviewing the agreements included as exhibits to this Annual Report on Form 10-K, please remember they are included to provide you with information regarding their terms and are not intended to provide any other factual or disclosure information about us or the other parties to the agreements. The agreements contain representations and warranties by each of the parties to the applicable agreement. These representations and warranties have been made solely for the benefit of the other parties to the applicable agreement and:
•should not in all instances be treated as categorical statements of fact, but rather as a way of allocating the risk to one of the parties if those statements prove to be inaccurate;
•have been qualified by disclosures that were made to the other party in connection with the negotiation of the applicable agreement, which disclosures are not necessarily reflected in the agreement;
•may apply standards of materiality in a way that is different from what may be viewed as material to you or other investors; and
•were made only as of the date of the applicable agreement or such other date or dates as may be specified in the agreement and are subject to more recent developments.
Accordingly, these representations and warranties may not describe the actual state of affairs as of the date they were made or at any other time. Additional information about us may be found elsewhere in this Annual Report on Form 10-K and our other public filings, which are available without charge through the SEC's website at http://www.sec.gov.
133

Table of Contents
INDEX TO EXHIBITS

3.1 | Articles of Restatement, incorporated by reference to the Company's Form 10-Q, dated July 11, 2014, filed with the SEC on August 11, 2014.
3.2 | Articles of Amendment to the Company’s Articles of Restatement, incorporated by reference to the Company’s Form 8-K, dated July 18, 2017, filed with the SEC on July 18, 2017.
3.3 | Articles of Amendment to the Company’s Articles of Restatement, incorporated by reference to Exhibit 3.1 to the Company’s Form 8-K, dated January 20, 2021, filed with the SEC on January 20, 2021.
3.4 | Articles of Amendment to the Company’s Articles of Restatement, incorporated by reference to Exhibit 3.2 to the Company’s Form 8-K, dated January 20, 2021, filed with the SEC on January 20, 2021.
3.5 | Articles of Amendment to the Company's Articles of Restatement, incorporated by reference to Exhibit 3.1 to the Company's Form 8-K, dated January 21, 2022, filed with the SEC on January 21, 2022.
3.6 | Articles of Amendment to the Company's Articles of Restatement, incorporated by reference to Exhibit 3.2 to the Company's Form 8-K, dated January 21, 2022, filed with the SEC on January 21, 2022.
3.7 | Fifth Amended and Restated Bylaws of the Company, incorporated by reference to the Company's Form 8-K, dated December 21, 2018, filed with the SEC on December 28, 2018.
3.8 | First Amendment to Fifth Amended and Restated Bylaws of the Company, effective as of May 11, 2020, incorporated by reference to the Company's Form 8-K, dated May 11, 2020, filed with the SEC on May 13, 2020.
3.9 | Articles Supplementary Electing that SL Green Realty Corp. be Subject to Maryland General Corporations Law Section 3-804(c), incorporated by reference to the Company's Form 8-K, dated September 16, 2009, filed with the SEC on September 16, 2009.
3.10 | Articles Supplementary reclassifying 4,600,000 shares of 8.0% Series A Convertible Cumulative Preferred Stock, 1,300,000 shares of Series B Junior Participating Preferred Stock and 4,000,000 shares of 7.875% Series D Cumulative Redeemable Preferred Stock into authorized preferred stock without further designation, incorporated by reference to the Company's Form 8-K, dated August 9, 2012, filed with the SEC on August 10, 2012.
3.11 | Articles Supplementary classifying and designating 9,200,000 shares of the Company's 6.50% Series I Cumulative Redeemable Preferred Stock, liquidation preference $25.00 per share, par value $0.01 per share, incorporated by reference to the Company's Form 8-K, dated August 9, 2012, filed with the SEC on August 10, 2012.
3.12 | First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, incorporated by reference to the Company's Form 8-K, dated October 23, 2002, filed with the SEC on October 23, 2002.
3.13 | First Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated May 14, 1998, incorporated by reference to the Company's Form 8-K, dated October 23, 2002, filed with the SEC on October 23, 2002.
3.14 | Second Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2002, filed with the SEC on July 31, 2002.
3.15 | Fifth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of March 15, 2006, incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2005, filed with the SEC on March 16, 2006.
3.16 | Seventh Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of January 25, 2007, incorporated by reference to the Company's Form 8-K, dated January 24, 2007, filed with the SEC on January 30, 2007.
3.17 | Eighth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of January 20, 2010, incorporated by reference to the Company's Form 8-K, dated January 20, 2010, filed with the SEC on January 20, 2010.
3.18 | Tenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of January 31, 2012, incorporated by reference to the Company's Form 8-K, dated January 31, 2012, filed with the SEC on February 2, 2012.
3.19 | Eleventh Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated March 6, 2012, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2012, filed with the SEC on May 10, 2012.
3.20 | Twelfth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of August 10, 2012, incorporated by reference to the Company's Form 8-K, dated August 10, 2012, filed with the SEC on August 10, 2012.
3.21 | Fourteenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of July 1, 2014, incorporated by reference to the Company's Form 8-K, dated July 2, 2014, filed with the SEC on July 2, 2014.

134

Table of Contents

3.22 | Fifteenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of July 1, 2014, incorporated by reference to the Company's Form 8-K, dated July 2, 2014, filed with the SEC on July 2, 2014.
3.23 | Eighteenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of June 25, 2015, incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2021, filed with the SEC on February 18, 2022.
3.24 | Nineteenth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of July 22, 2015, incorporated by reference to the Company's Form 8-K, dated July 24, 2015, filed with the SEC on July 24, 2015.
3.25 | Twentieth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of July 22, 2015, incorporated by reference to the Company's Form 8-K, dated July 24, 2015, filed with the SEC on July 24, 2015.
3.26 | Twenty-First Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of August 20, 2015, incorporated by reference to the Company's Form 8-K, dated as of August 21, 2015, filed with the SEC on August 21, 2015.
3.27 | Twenty-Second Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of August 20, 2015, incorporated by reference to the Company's Form 8-K, dated as of August 21, 2015, filed with the SEC on August 21, 2015.
3.28 | Twenty-Fifth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of June 17, 2016, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2016, filed with the SEC on November 9, 2016.
3.29 | Twenty-Sixth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of May 1, 2019, incorporated by reference to the Company's Form 8-K, dated as of May 3, 2019, filed with the SEC on May 3, 2019.
3.30 | Twenty-Seventh Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of January 8, 2020, incorporated by reference to the Company's Form 8-K, dated as of January 14, 2020, filed with the SEC on January 14, 2020.
3.31 | Twenty-Eighth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of December 20, 2021, incorporated by reference to the Company's Form 8-K, dated as of December 20, 2021, filed with the SEC on December 22, 2021.
3.32 | Twenty-Ninth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of October 26, 2022, incorporated by reference to the Company's Form 8-K, dated as of October 26, 2022, filed with the SEC on October 28, 2022.
3.33 | Thirtieth Amendment to the First Amended and Restated Agreement of Limited Partnership of the Operating Partnership, dated as of April 20, 2023, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2023, filed with the SEC on May 5, 2023.
4.1 | Specimen Common Stock Certificate, incorporated by reference to the Company's Registration Statement on Form S-11 (No. 333-29329), declared effective by the SEC on August 14, 1997.
4.2 | Form of stock certificate evidencing the 6.50% Series I Cumulative Redeemable Preferred Stock of the Company, liquidation preference $25.00 per share, par value $0.01 per share, incorporated by reference to the Company's Form 8-K, dated August 9, 2012, filed with the SEC on August 10, 2012.
4.3 | Indenture, dated as of August 5, 2011, among the Company, the Operating Partnership and ROP, as Co-Obligors, and The Bank of New York Mellon, as Trustee, incorporated by reference to the Company's Form 8-K, dated August 5, 2011, filed with the SEC on August 5, 2011.
4.4 | Junior Subordinated Indenture, dated as of June 30, 2005, between the Operating Partnership and JPMorgan Chase Bank, National Association, as Trustee, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2005, filed with the SEC on August 9, 2005.
4.5 | Indenture, dated as of October 5, 2017, among the Operating Partnership and The Bank of New York Mellon, as Trustee, incorporated by reference to the Company’s Form 8-K, dated October 5, 2017, filed with the SEC on October 5, 2017.
4.6 | Description of the registrant's securities registered pursuant to section 12 of the Securities and Exchange Act of 1934, filed herewith.
10.1 | Amended and Restated Agreement of Limited Partnership of ROP, dated December 6, 1995, incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2017, filed with the SEC on February 23, 2018.
10.2 | Supplement to the Amended and Restated Agreement of Limited Partnership of ROP relating to the succession as a general partner of Wyoming Acquisition GP LLC, incorporated by reference to ROP's Annual Report on Form 10-K for the year ended December 31, 2007, filed with the SEC on March 31, 2008.

135

Table of Contents

10.3 | Form of Articles of Incorporation and Bylaws of S.L. Green Management Corp., incorporated by reference to the Company's Registration Statement on Form S-11 (No. 333-29329), declared effective by the SEC on August 14, 1997.
10.4 | Form of Registration Rights Agreement between the Company and the persons named therein, incorporated by reference to the Company's Registration Statement on Form S-11 (No. 333-29329), declared effective by the SEC on August 14, 1997.
10.5 | Amended and Restated Trust Agreement among the Operating Partnership, as depositor, JPMorgan Chase Bank, National Association, as property trustee, Chase Bank USA, National Association, as Delaware trustee, and the administrative trustees named therein, dated June 30, 2005, incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2005, filed with the SEC on August 9, 2005.
10.6 | SL Green Realty Corp. Fifth Amended and Restated 2005 Stock Option and Incentive Plan, incorporated by reference to Appendix A to the Company's definitive Proxy Statement on Schedule 14A filed on April 21, 2022
10.7 | Amended and Restated Non-Employee Directors' Deferral Program, dated December 13, 2017, incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2017, filed with the SEC on February 23, 2018.
10.8 | Amended and Restated Employment and Non-competition Agreement, dated December 24, 2010, between Stephen L. Green and the Company, incorporated by reference to the Company's Form 8-K, dated December 23, 2010, filed with the SEC on December 29, 2010.
10.9 | Deferred Compensation Agreement, dated December 18, 2009, between the Company and Stephen L. Green, incorporated by reference to the Company's Form 8-K, dated December 18, 2009, filed with the SEC on December 24, 2009.
10.10 | Deferred Compensation Agreement, dated December 24, 2010, between the Company and Stephen L. Green, incorporated by reference to the Company's Form 8-K, dated December 23, 2010, filed with the SEC on December 29, 2010.
10.11 | Deferred Compensation Agreement (2013), dated as of September 12, 2013, by and between the Company and Marc Holliday, incorporated by reference to the Company’s Form 8-K, dated September 12, 2013, filed with the SEC on September 13, 2013.
10.12 | Deferred Compensation Agreement, dated as of February 10, 2016, by and between SL Green Realty Corp. and Marc Holliday, incorporated by reference to the Company's Form 8-K, dated February 10, 2016, filed with the SEC on February 12, 2016.
10.13 | Deferred Compensation Agreement (2014), dated as of November 8, 2013, between the Company and Andrew Mathias, incorporated by reference to the Company’s Form 8-K, dated November 8, 2013, filed with the SEC on November 8, 2013.
10.14 | Amended and Restated Employment and Noncompetition Agreement, dated as of December 31, 2021, by and between SL Green Realty Corp. and Marc Holliday, incorporated by reference to the Company's Form 8-K/A, dated December 31, 2021, filed with the SEC on January 6, 2022.
10.15 | Letter Agreement, dated as of April 30, 2018, by and between SL Green Realty Corp. and Marc Holliday, incorporated by reference to the Company's Form 8-K, dated April 27, 2018, filed with the SEC on May 3, 2018.
10.16 | Amended and Restated Employment and Noncompetition Agreement, dated as of December 31, 2021, by and between SL Green Realty Corp. and Andrew Levine, incorporated by reference to the Company's Form 8-K/A, dated December 31, 2021, filed with the SEC on January 6, 2022.
10.17 | Chairman Emeritus Agreement, dated as of December 21, 2018, by and between SL Green Realty Corp. and Stephen L. Green, incorporated by reference to the Company's Form 8-K, dated December 21, 2018, filed with the SEC on December 28, 2018.
10.18 | Third Amended and Restated Credit Agreement, dated as of December 6, 2021, by and among SL Green Realty Corp. and SL Green Operating Partnership, L.P., as Borrowers, each of the Lenders party thereto, Wells Fargo Bank, National Association, as Administrative Agent, Wells Fargo Securities, LLC, JPMorgan Chase Bank, N.A., Deutsche Bank Securities Inc. and TD Bank, N.A., as joint lead arrangers and joint bookrunners for the Revolving Credit Facility and Term Loan A Facility, BofA Securities, Inc. BMO Capital Markets Corp. and The Bank of New York Mellon, as joint lead arrangers for the Revolving Credit Facility and Term Loan A Facility, JPMorgan Chase Bank, N.A., as syndication agent for the Revolving Credit Facility and Term Loan A Facility, Deutsche Bank Securities Inc., TD Bank N.A., Bank of America, N.A., Bank of Montreal and The Bank of New York Mellon, as documentation agents for the Revolving Credit Facility and Term Loan A Facility, Wells Fargo Securities, LLC and U.S. Bank National Association, as joint lead arrangers and joint bookrunners for the Term Loan B Facility, U.S. Bank National Association, as syndication agent for the Term Loan B Facility, Wells Fargo Bank, National Association, as sustainability agent, and the other lenders and agents a party thereto, incorporated by reference to the Company's Form 8-K, dated December 6, 2021, filed with the SEC on December 8, 2021.
10.19 | Amended and Restated Employment and Noncompetition Agreement, dated as of March 2, 2023, by and between SL Green Realty Corp. and Matthew DiLiberto, incorporated by reference to the Company's Form 8-K, dated March 2, 2023, filed with the SEC on March 6, 2023.

136

Table of Contents

10.20 | Non-Renewal and Advisory Agreement, dated as of October 9, 2023, by and between SL Green Realty Corp. and Andrew Mathias, incorporated by reference to the Company's Form 8-K, dated October 9, 2023, filed with the SEC on October 10, 2023.
10.21 | First Amendment to Amended and Restated Employment and Noncompetition Agreement, dated as of January 30, 2024, by and between SL Green Realty Corp. and Matthew DiLiberto, incorporated by reference to the Company's Form 8-K, dated January 30, 2024, filed with the SEC on February 2, 2024.
16.1 | Letter of Ernst & Young LLP, dated November 29, 2023, to the Securities and Exchange Commission, incorporated by reference to the Company's Form 8-K, dated November 29, 2023, filed with the SEC on November 29, 2023.
21.1 | Subsidiaries of SL Green Realty Corp., filed herewith.
21.2 | Subsidiaries of SL Green Operating Partnership L.P., filed herewith.
23.1 | Consent of Ernst & Young LLP for SL Green Realty Corp., filed herewith.
23.2 | Consent of Ernst & Young LLP for SL Green Operating Partnership, L.P., filed herewith.
24.1 | Power of Attorney for SL Green Realty Corp., included on the signature page of this Form 10-K.
24.2 | Power of Attorney for SL Green Operating Partnership, L.P., included on the signature page of this Form 10-K.
31.1 | Certification by the Chief Executive Officer of the Company pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
31.2 | Certification by the Chief Financial Officer of the Company pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
31.3 | Certification by the Chief Executive Officer of the Company, the sole general partner of the Operating Partnership pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
31.4 | Certification by the Chief Financial Officer of the Company, the sole general partner of the Operating Partnership pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
32.1 | Certification by the Chief Executive Officer pursuant to 18 U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, furnished herewith.
32.2 | Certification by the Chief Financial Officer pursuant to 18 U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, furnished herewith.
32.3 | Certification by the Chief Executive Officer of the Company, the sole general partner of the Operating Partnership pursuant to 18 U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, furnished herewith.
32.4 | Certification by the Chief Financial Officer of the Company, the sole general partner of the Operating Partnership pursuant to 18 U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, furnished herewith.
97.1 | Compensation Recovery Policy, filed herewith.
101 | The following financial statements from SL Green Realty Corp. and SL Green Operating Partnership L.P.’s Annual Report on Form 10-K for the year ended December 31, 2023, formatted in Inline XBRL: (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Operations, (iii) Consolidated Statements of Comprehensive (Loss) Income, (iv) Consolidated Statements of Equity, (v) Consolidated Statements of Capital, (vi) Consolidated Statements of Cash Flows, and (vii) Notes to Consolidated Financial Statements, detail tagged and filed herewith.
104 | Cover Page Interactive Data File (formatted in Inline XBRL in Exhibit 101)

137

Table of Contents
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

|  | SL GREEN REALTY CORP.
|  | By: |  | /s/ Matthew J. DiLiberto
Dated: February 23, 2024 |  |  |  | Matthew J. DiLiberto Chief Financial Officer

________________________________________________________________________________________________________________________
KNOW ALL MEN BY THESE PRESENTS, that we, the undersigned officers and directors of SL Green Realty Corp. hereby severally constitute Marc Holliday and Matthew J. DiLiberto, and each of them singly, our true and lawful attorneys and with full power to them, and each of them singly, to sign for us and in our names in the capacities indicated below, the Annual Report on Form 10-K filed herewith and any and all amendments to said Annual Report on Form 10-K, and generally to do all such things in our names and in our capacities as officers and directors to enable SL Green Realty Corp. to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming our signatures as they may be signed by our said attorneys, or any of them, to said Annual Report on Form 10-K and any and all amendments thereto.
138

Table of Contents
Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated:

Signatures | Title | Date
/s/ Marc Holliday | Chairman of the Board of Directors, Chief Executive Officer and Interim President (Principal Executive Officer) | February 23, 2024
Marc Holliday
/s/ Matthew J. DiLiberto | Chief Financial Officer (Principal Financial and Accounting Officer) | February 23, 2024
Matthew J. DiLiberto
/s/ Stephen L. Green | Director | February 23, 2024
Stephen L. Green
/s/ Andrew W. Mathias | Director | February 22, 2024
Andrew W. Mathias
/s/ John H. Alschuler Jr. | Director | February 23, 2024
John H. Alschuler, Jr.
/s/ Edwin T. Burton, III | Director | February 23, 2024
Edwin T. Burton, III
/s/ Craig M. Hatkoff | Director | February 23, 2024
Craig M. Hatkoff
/s/ Betsy S. Atkins | Director | February 23, 2024
Betsy S. Atkins
/s/ Lauren B. Dillard | Director | February 23, 2024
Lauren B. Dillard
/s/ Carol Brown | Director | February 23, 2024
Carol Brown

139

Table of Contents
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

|  | SL GREEN OPERATING PARTNERSHIP, L.P.
|  | By: |  | SL Green Realty Corp.
|  |  |  | /s/ Matthew J. DiLiberto
Dated: February 23, 2024 |  | By: |  | Matthew J. DiLiberto Chief Financial Officer

________________________________________________________________________________________________________________________
KNOW ALL MEN BY THESE PRESENTS, that we, the undersigned officers and directors of SL Green Realty Corp., the sole general partner of SL Green Operating Partnership, L.P., hereby severally constitute Marc Holliday and Matthew J. DiLiberto, and each of them singly, our true and lawful attorneys and with full power to them, and each of them singly, to sign for us and in our names in the capacities indicated below, the Annual Report on Form 10-K filed herewith and any and all amendments to said Annual Report on Form 10-K, and generally to do all such things in our names and in our capacities as officers and directors to enable SL Green Operating Partnership, L.P. to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming our signatures as they may be signed by our said attorneys, or any of them, to said Annual Report on Form 10-K and any and all amendments thereto.
140

Table of Contents
Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated:

Signatures | Title | Date
/s/ Marc Holliday | Chairman of the Board of Directors, Chief Executive Officer and Interim President of SL Green, the sole general partner of the Operating Partnership (Principal Executive Officer) | February 23, 2024
Marc Holliday
/s/ Matthew J. DiLiberto | Chief Financial Officer of SL Green, the sole general partner of the Operating Partnership (Principal Financial and Accounting Officer) | February 23, 2024
Matthew J. DiLiberto
/s/ Stephen L. Green | Director of SL Green, the sole general partner of the Operating Partnership | February 23, 2024
Stephen L. Green
/s/ Andrew W. Mathias | Director of SL Green, the sole general partner of the Operating Partnership | February 22, 2024
Andrew W. Mathias
/s/ John H. Alschuler, Jr. | Director of SL Green, the sole general partner of the Operating Partnership | February 23, 2024
John H. Alschuler, Jr.
/s/ Edwin T. Burton, III | Director of SL Green, the sole general partner of the Operating Partnership | February 23, 2024
Edwin T. Burton, III
/s/ Craig M. Hatkoff | Director of SL Green, the sole general partner of the Operating Partnership | February 23, 2024
Craig M. Hatkoff
/s/ Betsy S. Atkins | Director of SL Green, the sole general partner of the Operating Partnership | February 23, 2024
Betsy S. Atkins
/s/ Lauren B. Dillard | Director of SL Green, the sole general partner of the Operating Partnership | February 23, 2024
Lauren B. Dillard
/s/ Carol Brown | Director of SL Green, the sole general partner of the Operating Partnership | February 23, 2024
Carol Brown

141