0001075415 false 12/31 2025 Q3 False False False False http://fasb.org/us-gaap/2025#OtherAssets http://fasb.org/us-gaap/2025#OtherAssets http://fasb.org/us-gaap/2025#OtherLiabilities http://fasb.org/us-gaap/2025#OtherLiabilities xbrli:shares iso4217:USD iso4217:USD xbrli:shares dhc:property dhc:state dhc:jointVenture xbrli:pure utr:sqft dhc:option dhc:security dhc:trustee dhc:segment dhc:operator dhc:community dhc:employee dhc:agreement dhc:jointVenture_arrangement 0001075415 2025-01-01 2025-09-30 0001075415 dhc:SeniorNotesDue2042Member 2025-01-01 2025-09-30 0001075415 dhc:SeniorNotesDue2046Member 2025-01-01 2025-09-30 0001075415 2025-11-01 0001075415 2025-07-01 2025-09-30 0001075415 2025-09-30 0001075415 2024-12-31 0001075415 us-gaap:SecuredDebtMember 2025-09-30 0001075415 us-gaap:SecuredDebtMember 2024-12-31 0001075415 us-gaap:UnsecuredDebtMember 2025-09-30 0001075415 us-gaap:UnsecuredDebtMember 2024-12-31 0001075415 dhc:RentalIncomeMember 2025-07-01 2025-09-30 0001075415 dhc:RentalIncomeMember 2024-07-01 2024-09-30 0001075415 dhc:RentalIncomeMember 2025-01-01 2025-09-30 0001075415 dhc:RentalIncomeMember 2024-01-01 2024-09-30 0001075415 dhc:ResidentFeesAndServicesMember 2025-07-01 2025-09-30 0001075415 dhc:ResidentFeesAndServicesMember 2024-07-01 2024-09-30 0001075415 dhc:ResidentFeesAndServicesMember 2025-01-01 2025-09-30 0001075415 dhc:ResidentFeesAndServicesMember 2024-01-01 2024-09-30 0001075415 2024-07-01 2024-09-30 0001075415 2024-01-01 2024-09-30 0001075415 srt:AffiliatedEntityMember 2025-07-01 2025-09-30 0001075415 srt:AffiliatedEntityMember 2024-07-01 2024-09-30 0001075415 srt:AffiliatedEntityMember 2025-01-01 2025-09-30 0001075415 srt:AffiliatedEntityMember 2024-01-01 2024-09-30 0001075415 us-gaap:CommonStockMember 2024-12-31 0001075415 us-gaap:AdditionalPaidInCapitalMember 2024-12-31 0001075415 us-gaap:RetainedEarningsMember 2024-12-31 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-12-31 0001075415 dhc:CumulativeCommonDistributionsMember 2024-12-31 0001075415 us-gaap:RetainedEarningsMember 2025-01-01 2025-03-31 0001075415 2025-01-01 2025-03-31 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-01-01 2025-03-31 0001075415 dhc:CumulativeCommonDistributionsMember 2025-01-01 2025-03-31 0001075415 us-gaap:CommonStockMember 2025-01-01 2025-03-31 0001075415 us-gaap:AdditionalPaidInCapitalMember 2025-01-01 2025-03-31 0001075415 us-gaap:CommonStockMember 2025-03-31 0001075415 us-gaap:AdditionalPaidInCapitalMember 2025-03-31 0001075415 us-gaap:RetainedEarningsMember 2025-03-31 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-03-31 0001075415 dhc:CumulativeCommonDistributionsMember 2025-03-31 0001075415 2025-03-31 0001075415 us-gaap:RetainedEarningsMember 2025-04-01 2025-06-30 0001075415 2025-04-01 2025-06-30 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-04-01 2025-06-30 0001075415 dhc:CumulativeCommonDistributionsMember 2025-04-01 2025-06-30 0001075415 us-gaap:CommonStockMember 2025-04-01 2025-06-30 0001075415 us-gaap:AdditionalPaidInCapitalMember 2025-04-01 2025-06-30 0001075415 us-gaap:CommonStockMember 2025-06-30 0001075415 us-gaap:AdditionalPaidInCapitalMember 2025-06-30 0001075415 us-gaap:RetainedEarningsMember 2025-06-30 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-06-30 0001075415 dhc:CumulativeCommonDistributionsMember 2025-06-30 0001075415 2025-06-30 0001075415 us-gaap:RetainedEarningsMember 2025-07-01 2025-09-30 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-07-01 2025-09-30 0001075415 dhc:CumulativeCommonDistributionsMember 2025-07-01 2025-09-30 0001075415 us-gaap:CommonStockMember 2025-07-01 2025-09-30 0001075415 us-gaap:AdditionalPaidInCapitalMember 2025-07-01 2025-09-30 0001075415 us-gaap:CommonStockMember 2025-09-30 0001075415 us-gaap:AdditionalPaidInCapitalMember 2025-09-30 0001075415 us-gaap:RetainedEarningsMember 2025-09-30 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-09-30 0001075415 dhc:CumulativeCommonDistributionsMember 2025-09-30 0001075415 us-gaap:CommonStockMember 2023-12-31 0001075415 us-gaap:AdditionalPaidInCapitalMember 2023-12-31 0001075415 us-gaap:RetainedEarningsMember 2023-12-31 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2023-12-31 0001075415 dhc:CumulativeCommonDistributionsMember 2023-12-31 0001075415 2023-12-31 0001075415 us-gaap:RetainedEarningsMember 2024-01-01 2024-03-31 0001075415 2024-01-01 2024-03-31 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-01-01 2024-03-31 0001075415 dhc:CumulativeCommonDistributionsMember 2024-01-01 2024-03-31 0001075415 us-gaap:AdditionalPaidInCapitalMember 2024-01-01 2024-03-31 0001075415 us-gaap:CommonStockMember 2024-01-01 2024-03-31 0001075415 us-gaap:CommonStockMember 2024-03-31 0001075415 us-gaap:AdditionalPaidInCapitalMember 2024-03-31 0001075415 us-gaap:RetainedEarningsMember 2024-03-31 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-03-31 0001075415 dhc:CumulativeCommonDistributionsMember 2024-03-31 0001075415 2024-03-31 0001075415 us-gaap:RetainedEarningsMember 2024-04-01 2024-06-30 0001075415 2024-04-01 2024-06-30 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-04-01 2024-06-30 0001075415 dhc:CumulativeCommonDistributionsMember 2024-04-01 2024-06-30 0001075415 us-gaap:CommonStockMember 2024-04-01 2024-06-30 0001075415 us-gaap:AdditionalPaidInCapitalMember 2024-04-01 2024-06-30 0001075415 us-gaap:CommonStockMember 2024-06-30 0001075415 us-gaap:AdditionalPaidInCapitalMember 2024-06-30 0001075415 us-gaap:RetainedEarningsMember 2024-06-30 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-06-30 0001075415 dhc:CumulativeCommonDistributionsMember 2024-06-30 0001075415 2024-06-30 0001075415 us-gaap:RetainedEarningsMember 2024-07-01 2024-09-30 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-07-01 2024-09-30 0001075415 dhc:CumulativeCommonDistributionsMember 2024-07-01 2024-09-30 0001075415 us-gaap:CommonStockMember 2024-07-01 2024-09-30 0001075415 us-gaap:AdditionalPaidInCapitalMember 2024-07-01 2024-09-30 0001075415 us-gaap:CommonStockMember 2024-09-30 0001075415 us-gaap:AdditionalPaidInCapitalMember 2024-09-30 0001075415 us-gaap:RetainedEarningsMember 2024-09-30 0001075415 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-09-30 0001075415 dhc:CumulativeCommonDistributionsMember 2024-09-30 0001075415 2024-09-30 0001075415 us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember 2025-09-30 0001075415 dhc:JointVentureMember 2025-09-30 0001075415 dhc:SeniorLivingMember stpr:DE us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-01-31 0001075415 dhc:SeniorLivingMember stpr:DE us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-01-01 2025-01-31 0001075415 dhc:LifeSciencePropertyMember stpr:CA us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-01-31 0001075415 dhc:LifeSciencePropertyMember stpr:CA us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-01-01 2025-01-31 0001075415 dhc:LifeSciencePropertyMember stpr:AZ us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-02-28 0001075415 dhc:LifeSciencePropertyMember stpr:AZ us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-02-01 2025-02-28 0001075415 dhc:SeniorLivingMember dhc:VariousMember us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-02-28 0001075415 dhc:SeniorLivingMember dhc:VariousMember us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-02-01 2025-02-28 0001075415 dhc:MedicalOfficeBuildingMember stpr:CT us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-03-31 0001075415 dhc:MedicalOfficeBuildingMember stpr:CT us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-03-01 2025-03-31 0001075415 dhc:SeniorLivingMember stpr:TN us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-05-31 0001075415 dhc:SeniorLivingMember stpr:TN us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-05-01 2025-05-31 0001075415 dhc:MedicalOfficeBuildingMember stpr:MO us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-05-31 0001075415 dhc:MedicalOfficeBuildingMember stpr:MO us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-05-01 2025-05-31 0001075415 dhc:MedicalOfficeBuildingMember stpr:WI us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-07-31 0001075415 dhc:MedicalOfficeBuildingMember stpr:WI us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-07-01 2025-07-31 0001075415 dhc:MedicalOfficeBuildingMember stpr:MT us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-07-31 0001075415 dhc:MedicalOfficeBuildingMember stpr:MT us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-07-01 2025-07-31 0001075415 srt:OtherPropertyMember stpr:NJ us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-07-31 0001075415 srt:OtherPropertyMember stpr:NJ us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-07-01 2025-07-31 0001075415 dhc:MedicalOfficeBuildingMember stpr:PA us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-08-31 0001075415 dhc:MedicalOfficeBuildingMember stpr:PA us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-08-01 2025-08-31 0001075415 dhc:SeniorLivingMember stpr:GA us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-09-30 0001075415 dhc:SeniorLivingMember stpr:GA us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-09-01 2025-09-30 0001075415 dhc:MedicalOfficeBuildingMember stpr:MD us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-09-30 0001075415 dhc:MedicalOfficeBuildingMember stpr:MD us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-09-01 2025-09-30 0001075415 us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-09-30 0001075415 us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-01-01 2025-09-30 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-09-30 0001075415 us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember dhc:SubsequentPropertiesDisposedMember us-gaap:SubsequentEventMember 2025-11-03 0001075415 us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember dhc:SubsequentPropertiesDisposedMember us-gaap:SubsequentEventMember 2025-10-01 2025-11-03 0001075415 us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SubsequentEventMember 2025-10-01 2025-10-31 0001075415 us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SubsequentEventMember 2025-10-31 0001075415 us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember us-gaap:SubsequentEventMember 2025-11-03 0001075415 us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember us-gaap:SubsequentEventMember 2025-11-03 2025-11-03 0001075415 us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SubsequentEventMember 2025-11-03 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SubsequentEventMember 2025-11-03 2025-11-03 0001075415 dhc:MedicalOfficeBuildingandLifeScienceBuildingMember 2025-01-01 2025-09-30 0001075415 dhc:MedicalOfficeBuildingandLifeScienceBuildingMember 2025-09-30 0001075415 dhc:MedicalOfficeBuildingandLifeScienceBuildingMember us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-09-30 0001075415 dhc:MedicalOfficeBuildingandLifeScienceBuildingMember us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember 2025-09-30 0001075415 dhc:SeniorLivingCommunityMember us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember 2025-01-01 2025-09-30 0001075415 dhc:SeniorLivingCommunityMember us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember 2025-09-30 0001075415 dhc:SeniorLivingCommunityMember us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2025-07-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2024-07-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2024-01-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:LeaseRelatedCostsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-07-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:LeaseRelatedCostsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2024-07-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:LeaseRelatedCostsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:LeaseRelatedCostsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2024-01-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember us-gaap:BuildingImprovementsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-07-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember us-gaap:BuildingImprovementsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2024-07-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember us-gaap:BuildingImprovementsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember us-gaap:BuildingImprovementsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2024-01-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-07-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2024-07-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2024-01-01 2024-09-30 0001075415 us-gaap:CorporateNonSegmentMember 2025-07-01 2025-09-30 0001075415 us-gaap:CorporateNonSegmentMember 2024-07-01 2024-09-30 0001075415 us-gaap:CorporateNonSegmentMember 2025-01-01 2025-09-30 0001075415 us-gaap:CorporateNonSegmentMember 2024-01-01 2024-09-30 0001075415 dhc:SeaportInnovationLLCMember us-gaap:CorporateJointVentureMember 2025-09-30 0001075415 dhc:TheLSMDFundREITLLCMember us-gaap:CorporateJointVentureMember 2025-09-30 0001075415 us-gaap:CorporateJointVentureMember 2025-09-30 0001075415 stpr:MA dhc:SeaportInnovationLLCMember us-gaap:CorporateJointVentureMember 2025-09-30 0001075415 stpr:CA dhc:TheLSMDFundREITLLCMember us-gaap:CorporateJointVentureMember 2025-09-30 0001075415 stpr:MA dhc:SeaportInnovationLLCMember us-gaap:CorporateJointVentureMember 2025-08-31 0001075415 stpr:CA dhc:TheLSMDFundREITLLCMember us-gaap:CorporateJointVentureMember 2025-01-01 2025-09-30 0001075415 stpr:CA us-gaap:InterestRateCapMember dhc:TheLSMDFundREITLLCMember us-gaap:CorporateJointVentureMember 2025-01-01 2025-09-30 0001075415 dhc:MedicalOfficeBuildingandLifeScienceBuildingMember us-gaap:CorporateJointVentureMember 2025-01-01 2025-09-30 0001075415 us-gaap:CorporateJointVentureMember 2025-07-01 2025-09-30 0001075415 us-gaap:CorporateJointVentureMember 2024-07-01 2024-09-30 0001075415 us-gaap:CorporateJointVentureMember 2025-01-01 2025-09-30 0001075415 us-gaap:CorporateJointVentureMember 2024-01-01 2024-09-30 0001075415 dhc:SeaportInnovationLLCMember us-gaap:CorporateJointVentureMember 2025-08-21 2025-08-21 0001075415 dhc:SeaportInnovationLLCMember us-gaap:CorporateJointVentureMember 2025-08-21 2025-08-21 0001075415 dhc:AlerisLifeIncMember 2025-09-30 0001075415 dhc:AlerisLifeIncMember 2025-09-30 0001075415 dhc:AlerisLifeIncMember us-gaap:EquityMethodInvestmentsMember 2025-07-01 2025-09-30 0001075415 dhc:AlerisLifeIncMember us-gaap:EquityMethodInvestmentsMember 2024-07-01 2024-09-30 0001075415 dhc:AlerisLifeIncMember us-gaap:EquityMethodInvestmentsMember 2025-01-01 2025-09-30 0001075415 dhc:AlerisLifeIncMember us-gaap:EquityMethodInvestmentsMember 2024-01-01 2024-09-30 0001075415 dhc:AlerisLifeIncMember 2025-07-01 2025-09-30 0001075415 dhc:AlerisLifeIncMember 2024-07-01 2024-09-30 0001075415 dhc:AlerisLifeIncMember 2025-01-01 2025-09-30 0001075415 dhc:AlerisLifeIncMember 2024-01-01 2024-09-30 0001075415 dhc:AlerisLifeIncMember 2025-02-14 2025-02-14 0001075415 dhc:AlerisLifeIncMember 2025-02-14 2025-02-14 0001075415 dhc:AlerisLifeIncMember 2025-07-15 2025-07-15 0001075415 dhc:AlerisLifeIncMember 2025-07-15 2025-07-15 0001075415 dhc:SeniorUnsecuredNotes9.750PercentDue2025Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 dhc:SeniorUnsecuredNotes9.750PercentDue2025Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 dhc:SeniorUnsecuredNotes4.750PercentDue2028Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 dhc:SeniorUnsecuredNotes4.750PercentDue2028Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 dhc:SeniorUnsecuredNotes4375PercentDue2031Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 dhc:SeniorUnsecuredNotes4375PercentDue2031Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 dhc:SeniorUnsecuredNotes5.625PercentDue2042Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 dhc:SeniorUnsecuredNotes5.625PercentDue2042Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 dhc:SeniorUnsecuredNotes6.250PercentDue2046Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 dhc:SeniorUnsecuredNotes6.250PercentDue2046Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 dhc:SecuredRevolvingCreditFacilityDue2029Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 dhc:SecuredRevolvingCreditFacilityDue2029Member us-gaap:SecuredDebtMember 2024-12-31 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SecuredDebtMember 2024-12-31 0001075415 dhc:SeniorSecuredNotes7.250CouponRateDue2030Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 dhc:SeniorSecuredNotes7.250CouponRateDue2030Member us-gaap:SecuredDebtMember 2024-12-31 0001075415 dhc:FloatingRateMortgageNote6.82PercentDueMarch2028Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 dhc:FloatingRateMortgageNote6.82PercentDueMarch2028Member us-gaap:SecuredDebtMember 2024-12-31 0001075415 dhc:MortgageNotes6.57PercentDueJune2030Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 dhc:MortgageNotes6.57PercentDueJune2030Member us-gaap:SecuredDebtMember 2024-12-31 0001075415 dhc:MortgageNotes6.86PercentDueJune2034Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 dhc:MortgageNotes6.86PercentDueJune2034Member us-gaap:SecuredDebtMember 2024-12-31 0001075415 dhc:MortgageNotes6.22PercentDueMay2035Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 dhc:MortgageNotes6.22PercentDueMay2035Member us-gaap:SecuredDebtMember 2024-12-31 0001075415 dhc:MortgageNotes6.36PercentDueJune2035Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 dhc:MortgageNotes6.36PercentDueJune2035Member us-gaap:SecuredDebtMember 2024-12-31 0001075415 dhc:MortgageNotes6.44PercentDueJuly2043Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 dhc:MortgageNotes6.44PercentDueJuly2043Member us-gaap:SecuredDebtMember 2024-12-31 0001075415 dhc:FinancialLeases7.70PercentDueApril2026Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 dhc:FinancialLeases7.70PercentDueApril2026Member us-gaap:SecuredDebtMember 2024-12-31 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SecuredDebtMember 2025-01-01 2025-09-30 0001075415 dhc:SeniorSecuredNotes7.250CouponRateDue2030Member us-gaap:SecuredDebtMember 2025-01-01 2025-09-30 0001075415 dhc:FloatingRateMortgageNote6.82PercentDueMarch2028Member us-gaap:SecuredDebtMember 2025-01-01 2025-09-30 0001075415 us-gaap:InterestRateCapMember dhc:FloatingRateMortgageNote6.82PercentDueMarch2028Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 dhc:UnsecuredDebtNotGuaranteedMember 2025-09-30 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SecuredDebtMember 2025-07-01 2025-09-30 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SecuredDebtMember 2024-07-01 2024-09-30 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SecuredDebtMember 2024-01-01 2024-09-30 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SecuredDebtMember 2025-03-31 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SecuredDebtMember 2025-03-01 2025-03-31 0001075415 dhc:SeniorUnsecuredNotes9.750PercentDue2025Member dhc:SeniorUnsecuredNotesMember 2025-04-30 0001075415 dhc:SeniorUnsecuredNotes9.750PercentDue2025Member dhc:SeniorUnsecuredNotesMember 2025-04-01 2025-04-30 0001075415 dhc:SeniorUnsecuredNotes9.750PercentDue2025Member dhc:SeniorUnsecuredNotesMember 2025-05-31 0001075415 dhc:SeniorUnsecuredNotes9.750PercentDue2025Member dhc:SeniorUnsecuredNotesMember 2025-05-01 2025-05-31 0001075415 dhc:SeniorUnsecuredNotes9.750PercentDue2025Member dhc:SeniorUnsecuredNotesMember 2025-06-30 0001075415 dhc:SeniorUnsecuredNotes9.750PercentDue2025Member dhc:SeniorUnsecuredNotesMember 2025-06-01 2025-06-30 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SecuredDebtMember 2025-09-01 2025-09-30 0001075415 us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SecuredDebtMember 2025-09-30 0001075415 us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember dhc:SeniorSecuredNotesZeroCouponRateDue2026Member us-gaap:SecuredDebtMember 2025-01-01 2025-09-30 0001075415 dhc:SeniorSecuredNotes7.250CouponRateDue2030Member us-gaap:SecuredDebtMember 2025-09-01 2025-09-30 0001075415 dhc:FloatingRateMortgageNote6.82PercentDueMarch2028Member us-gaap:SecuredDebtMember 2025-03-31 0001075415 dhc:SeniorLivingCommunitiesMember dhc:FloatingRateMortgageNote6.82PercentDueMarch2028Member us-gaap:SecuredDebtMember 2025-03-31 0001075415 dhc:FloatingRateMortgageNote6.82PercentDueMarch2028Member us-gaap:SecuredDebtMember 2025-03-01 2025-03-31 0001075415 dhc:MortgageNotes6.22PercentDueMay2035Member us-gaap:SecuredDebtMember 2025-04-30 0001075415 dhc:SeniorLivingCommunitiesMember dhc:MortgageNotes6.22PercentDueMay2035Member us-gaap:SecuredDebtMember 2025-04-30 0001075415 dhc:MortgageNotes6.57PercentDueJune2030Member us-gaap:SecuredDebtMember 2025-05-31 0001075415 dhc:SeniorLivingCommunitiesMember dhc:MortgageNotes6.57PercentDueJune2030Member us-gaap:SecuredDebtMember 2025-05-31 0001075415 dhc:MortgageNotes6.36PercentDueJune2035Member us-gaap:SecuredDebtMember 2025-05-31 0001075415 dhc:SeniorLivingCommunitiesMember dhc:MortgageNotes6.36PercentDueJune2035Member us-gaap:SecuredDebtMember 2025-05-31 0001075415 dhc:SeniorUnsecuredNotes9.750PercentDue2025Member dhc:SeniorUnsecuredNotesMember 2025-04-01 2025-06-30 0001075415 dhc:SecuredRevolvingCreditFacilityDue2029Member us-gaap:SecuredDebtMember 2025-06-30 0001075415 dhc:SeniorLivingCommunitiesMember dhc:SecuredRevolvingCreditFacilityDue2029Member us-gaap:SecuredDebtMember 2025-06-30 0001075415 dhc:SecuredRevolvingCreditFacilityDue2029Member us-gaap:SecuredDebtMember 2025-06-01 2025-06-30 0001075415 dhc:SecuredRevolvingCreditFacilityDue2029Member srt:MinimumMember us-gaap:SecuredDebtMember 2025-06-01 2025-06-30 0001075415 dhc:SecuredRevolvingCreditFacilityDue2029Member srt:MaximumMember us-gaap:SecuredDebtMember 2025-06-01 2025-06-30 0001075415 dhc:SecuredRevolvingCreditFacilityDue2029Member us-gaap:SecuredDebtMember 2025-01-01 2025-09-30 0001075415 dhc:SecuredRevolvingCreditFacilityDue2029Member us-gaap:SecuredDebtMember us-gaap:SubsequentEventMember 2025-11-01 0001075415 dhc:SeaportInnovationLLCMember us-gaap:FairValueMeasurementsRecurringMember dhc:JointVentureMember us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001075415 dhc:SeaportInnovationLLCMember us-gaap:FairValueMeasurementsRecurringMember dhc:JointVentureMember us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001075415 dhc:TheLSMDFundREITLLCMember us-gaap:FairValueMeasurementsRecurringMember dhc:JointVentureMember us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0001075415 dhc:TheLSMDFundREITLLCMember us-gaap:FairValueMeasurementsRecurringMember dhc:JointVentureMember us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0001075415 us-gaap:InterestRateCapMember us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001075415 us-gaap:InterestRateCapMember us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001075415 dhc:SeaportInnovationLLCMember us-gaap:CorporateJointVentureMember us-gaap:MeasurementInputDiscountRateMember 2025-09-30 0001075415 dhc:SeaportInnovationLLCMember us-gaap:CorporateJointVentureMember dhc:MeasurementInputExitCapitalizationRateMember 2025-09-30 0001075415 dhc:SeaportInnovationLLCMember us-gaap:CorporateJointVentureMember 2025-01-01 2025-09-30 0001075415 dhc:TheLSMDFundREITLLCMember us-gaap:CorporateJointVentureMember srt:MinimumMember us-gaap:MeasurementInputDiscountRateMember 2025-09-30 0001075415 dhc:TheLSMDFundREITLLCMember us-gaap:CorporateJointVentureMember srt:MaximumMember us-gaap:MeasurementInputDiscountRateMember 2025-09-30 0001075415 dhc:TheLSMDFundREITLLCMember us-gaap:CorporateJointVentureMember srt:MinimumMember dhc:MeasurementInputExitCapitalizationRateMember 2025-09-30 0001075415 dhc:TheLSMDFundREITLLCMember us-gaap:CorporateJointVentureMember srt:MaximumMember dhc:MeasurementInputExitCapitalizationRateMember 2025-09-30 0001075415 dhc:TheLSMDFundREITLLCMember us-gaap:CorporateJointVentureMember 2025-01-01 2025-09-30 0001075415 dhc:MedicalOfficeBuildingMember 2025-07-01 2025-09-30 0001075415 dhc:MedicalOfficeBuildingMember us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember 2025-09-30 0001075415 dhc:MedicalOfficeBuildingMember 2025-09-30 0001075415 dhc:SeniorLivingCommunitiesMember 2025-07-01 2025-09-30 0001075415 dhc:SeniorLivingCommunitiesMember us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperationsMember 2025-09-30 0001075415 dhc:SeniorLivingCommunitiesMember 2025-09-30 0001075415 dhc:SeniorUnsecuredNotes9.750PercentDue2024Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorUnsecuredNotes9.750PercentDue2024Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorUnsecuredNotes9.750PercentDue2024Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorUnsecuredNotes9.750PercentDue2024Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorUnsecuredNotes9.750PercentDue2024Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 dhc:SeniorSecuredNotesZeroCouponRateDue2026Member dhc:SeniorSecuredNotesMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorSecuredNotesZeroCouponRateDue2026Member dhc:SeniorSecuredNotesMember 2025-09-30 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorSecuredNotesZeroCouponRateDue2026Member dhc:SeniorSecuredNotesMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorSecuredNotesZeroCouponRateDue2026Member dhc:SeniorSecuredNotesMember 2024-12-31 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorSecuredNotesZeroCouponRateDue2026Member dhc:SeniorSecuredNotesMember 2024-12-31 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorUnsecuredNotes4.750PercentDue2028Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorUnsecuredNotes4.750PercentDue2028Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorUnsecuredNotes4.750PercentDue2028Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorUnsecuredNotes4.750PercentDue2028Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 dhc:SeniorSecuredNotes7.250CouponRateDue2030Member dhc:SeniorSecuredNotesMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorSecuredNotes7.250CouponRateDue2030Member dhc:SeniorSecuredNotesMember 2025-09-30 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorSecuredNotes7.250CouponRateDue2030Member dhc:SeniorSecuredNotesMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorSecuredNotes7.250CouponRateDue2030Member dhc:SeniorSecuredNotesMember 2024-12-31 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorSecuredNotes7.250CouponRateDue2030Member dhc:SeniorSecuredNotesMember 2024-12-31 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorUnsecuredNotes4375PercentDue2031Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorUnsecuredNotes4375PercentDue2031Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorUnsecuredNotes4375PercentDue2031Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorUnsecuredNotes4375PercentDue2031Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorUnsecuredNotes5.625PercentDue2042Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorUnsecuredNotes5.625PercentDue2042Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorUnsecuredNotes5.625PercentDue2042Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorUnsecuredNotes5.625PercentDue2042Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorUnsecuredNotes6.250PercentDue2046Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorUnsecuredNotes6.250PercentDue2046Member dhc:SeniorUnsecuredNotesMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SeniorUnsecuredNotes6.250PercentDue2046Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SeniorUnsecuredNotes6.250PercentDue2046Member dhc:SeniorUnsecuredNotesMember 2024-12-31 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SecuredDebtsAndFinanceLeasesMember 2025-09-30 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SecuredDebtsAndFinanceLeasesMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember dhc:SecuredDebtsAndFinanceLeasesMember 2024-12-31 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember dhc:SecuredDebtsAndFinanceLeasesMember 2024-12-31 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2025-09-30 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2025-09-30 0001075415 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2024-12-31 0001075415 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2024-12-31 0001075415 dhc:SeniorUnsecuredNotesMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0001075415 dhc:SeniorUnsecuredNotesMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0001075415 dhc:SeniorUnsecuredNotesMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001075415 dhc:SeniorUnsecuredNotesMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001075415 dhc:SeniorSecuredNotesMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0001075415 dhc:SeniorSecuredNotesMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0001075415 dhc:ReitManagementAndResearchLLCMember dhc:ShareAwardPlansMember dhc:TrusteesMember 2025-03-20 2025-03-20 0001075415 dhc:ReitManagementAndResearchLLCMember dhc:ShareAwardPlansMember dhc:TrusteesMember 2025-03-20 0001075415 dhc:ReitManagementAndResearchLLCMember dhc:ShareAwardPlansMember dhc:TrusteesMember 2025-05-29 0001075415 dhc:ReitManagementAndResearchLLCMember dhc:ShareAwardPlansMember dhc:TrusteesMember 2025-05-29 2025-05-29 0001075415 dhc:ReitManagementAndResearchLLCMember dhc:ShareAwardPlansMember dhc:OfficersAndOtherEmployeesMember 2025-09-09 2025-09-09 0001075415 dhc:ReitManagementAndResearchLLCMember dhc:ShareAwardPlansMember dhc:OfficersAndOtherEmployeesMember 2025-09-09 0001075415 dhc:ReitManagementAndResearchLLCMember 2025-07-01 2025-09-30 0001075415 dhc:ReitManagementAndResearchLLCMember 2025-01-01 2025-09-30 0001075415 us-gaap:SubsequentEventMember 2025-10-09 2025-10-09 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2025-07-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-07-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember 2025-07-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2025-07-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-07-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember 2025-07-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember 2025-07-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember 2025-01-01 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2024-07-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2024-07-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember 2024-07-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2024-07-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2024-07-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember 2024-07-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember 2024-07-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2024-01-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2024-01-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:RentalIncomeMember 2024-01-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2024-01-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2024-01-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:ResidentFeesAndServicesMember 2024-01-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember 2024-01-01 2024-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:SeniorHousingOperatingPortfolioSegmentMember 2024-12-31 0001075415 us-gaap:OperatingSegmentsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2025-09-30 0001075415 us-gaap:OperatingSegmentsMember dhc:MedicalOfficeAndLifeSciencePortfolioSegmentMember 2024-12-31 0001075415 us-gaap:CorporateNonSegmentMember 2025-09-30 0001075415 us-gaap:CorporateNonSegmentMember 2024-12-31 0001075415 dhc:ThirdPartyManagersMember srt:AffiliatedEntityMember 2025-09-03 0001075415 dhc:SeniorLivingCommunityMember srt:AffiliatedEntityMember dhc:FiveStarSeniorLivingMember 2025-09-03 0001075415 dhc:SeniorLivingCommunityMember srt:AffiliatedEntityMember dhc:ThirdPartyManagersMember 2025-09-30 0001075415 dhc:SeniorLivingCommunityMember srt:AffiliatedEntityMember dhc:ThirdPartyManagersMember us-gaap:SubsequentEventMember 2025-11-03 0001075415 dhc:SeniorLivingCommunityMember srt:AffiliatedEntityMember dhc:FiveStarSeniorLivingMember 2025-01-01 2025-09-30 0001075415 dhc:SeniorLivingCommunityMember srt:AffiliatedEntityMember dhc:FiveStarSeniorLivingMember 2024-01-01 2024-09-30 0001075415 dhc:FiveStarSeniorLivingMember srt:AffiliatedEntityMember 2025-07-01 2025-09-30 0001075415 dhc:FiveStarSeniorLivingMember srt:AffiliatedEntityMember 2024-07-01 2024-09-30 0001075415 dhc:FiveStarSeniorLivingMember srt:AffiliatedEntityMember 2025-01-01 2025-09-30 0001075415 dhc:FiveStarSeniorLivingMember srt:AffiliatedEntityMember 2024-01-01 2024-09-30 0001075415 srt:AffiliatedEntityMember dhc:FiveStarSeniorLivingMember us-gaap:OperatingExpenseMember 2025-07-01 2025-09-30 0001075415 srt:AffiliatedEntityMember dhc:FiveStarSeniorLivingMember us-gaap:OperatingExpenseMember 2024-07-01 2024-09-30 0001075415 srt:AffiliatedEntityMember dhc:FiveStarSeniorLivingMember us-gaap:OperatingExpenseMember 2025-01-01 2025-09-30 0001075415 srt:AffiliatedEntityMember dhc:FiveStarSeniorLivingMember us-gaap:OperatingExpenseMember 2024-01-01 2024-09-30 0001075415 dhc:SeniorLivingCommunityMember srt:AffiliatedEntityMember dhc:ThirdPartyManagersMember 2025-01-01 2025-09-30 0001075415 dhc:SeniorLivingCommunityMember srt:AffiliatedEntityMember dhc:ThirdPartyManagersMember 2024-01-01 2024-09-30 0001075415 dhc:SeniorLivingCommunityMember srt:AffiliatedEntityMember dhc:ThirdPartyManagersMember 2025-07-01 2025-09-30 0001075415 dhc:SeniorLivingCommunityMember srt:AffiliatedEntityMember dhc:ThirdPartyManagersMember 2024-07-01 2024-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:BasicHousingAndSupportServicesMember 2025-07-01 2025-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:BasicHousingAndSupportServicesMember 2024-07-01 2024-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:BasicHousingAndSupportServicesMember 2025-01-01 2025-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:BasicHousingAndSupportServicesMember 2024-01-01 2024-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:MedicareAndMedicaidProgramsMember 2025-07-01 2025-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:MedicareAndMedicaidProgramsMember 2024-07-01 2024-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:MedicareAndMedicaidProgramsMember 2025-01-01 2025-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:MedicareAndMedicaidProgramsMember 2024-01-01 2024-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:PrivatePayAndOtherThirdPartyPayerServicesMember 2025-07-01 2025-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:PrivatePayAndOtherThirdPartyPayerServicesMember 2024-07-01 2024-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:PrivatePayAndOtherThirdPartyPayerServicesMember 2025-01-01 2025-09-30 0001075415 dhc:ResidentFeesAndServicesMember dhc:PrivatePayAndOtherThirdPartyPayerServicesMember 2024-01-01 2024-09-30 0001075415 dhc:SeniorLivingCommunityMember dhc:ReitManagementAndResearchMember 2025-01-01 2025-09-30 0001075415 dhc:ReitManagementAndResearchLLCMember 2025-07-01 2025-09-30 0001075415 dhc:ReitManagementAndResearchLLCMember 2024-07-01 2024-09-30 0001075415 dhc:ReitManagementAndResearchLLCMember 2025-01-01 2025-09-30 0001075415 dhc:ReitManagementAndResearchLLCMember 2024-01-01 2024-09-30 0001075415 dhc:ReitManagementAndResearchLLCMember 2025-01-31 0001075415 dhc:ReitManagementAndResearchLLCMember 2025-01-01 2025-01-31 0001075415 dhc:ReitManagementAndResearchMember 2025-01-01 2025-09-30 0001075415 dhc:DiversifiedHealthcareTrustMember dhc:ABPTrustAndMr.PortnoyMember 2025-09-30 0001075415 dhc:AlerisLifeIncMember 2024-02-16 0001075415 dhc:AlerisLifeIncMember 2024-02-16 2024-02-16 0001075415 dhc:AlerisLifeIncMember dhc:ABPTrustMember 2024-02-16 0001075415 dhc:DiversifiedHealthcareTrustMember dhc:AlerisLifeIncMember 2025-02-14 2025-02-14 0001075415 dhc:DiversifiedHealthcareTrustMember dhc:AlerisLifeIncMember 2025-07-15 2025-07-15 0001075415 dhc:ReitManagementAndResearchLLCMember us-gaap:RelatedPartyMember 2025-01-01 2025-09-30 0001075415 dhc:ReitManagementAndResearchLLCMember us-gaap:RelatedPartyMember 2025-09-30 0001075415 dhc:ReitManagementAndResearchLLCMember dhc:RentalIncomeMember 2025-07-01 2025-09-30 0001075415 dhc:ReitManagementAndResearchLLCMember dhc:RentalIncomeMember 2024-07-01 2024-09-30 0001075415 dhc:ReitManagementAndResearchLLCMember dhc:RentalIncomeMember 2025-01-01 2025-09-30 0001075415 dhc:ReitManagementAndResearchLLCMember dhc:RentalIncomeMember 2024-01-01 2024-09-30 0001075415 dhc:SeniorLivingCommunityMember dhc:FloatingRateMortgageNote6.82PercentDueMarch2028Member us-gaap:SecuredDebtMember 2025-03-31 0001075415 us-gaap:InterestRateCapMember us-gaap:DesignatedAsHedgingInstrumentMember dhc:FloatingRateMortgageNote6.82PercentDueMarch2028Member us-gaap:CashFlowHedgingMember 2025-09-30
Table of Contents

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549
FORM 10-Q
☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2025
OR
☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
Commission File Number 1-15319
DIVERSIFIED HEALTHCARE TRUST
(Exact Name of Registrant as Specified in Its Charter)

Maryland |  | 04-3445278
(State or Other Jurisdiction of Incorporation or Organization) |  | (IRS Employer Identification No.)

Two Newton Place, 255 Washington Street, Suite 300, Newton, MA 02458-1634
(Address of Principal Executive Offices) (Zip Code)
617 - 796 - 8350
(Registrant's Telephone Number, Including Area Code)
Securities registered pursuant to Section 12(b) of the Act:

Title Of Each Class | Trading Symbol(s) | Name Of Each Exchange On Which Registered
Common Shares of Beneficial Interest | DHC | The Nasdaq Stock Market LLC
5.625% Senior Notes due 2042 | DHCNI | The Nasdaq Stock Market LLC
6.25% Senior Notes due 2046 | DHCNL | The Nasdaq Stock Market LLC

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. Yes ☒ No ☐
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). Yes ☒ No ☐
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.

Large accelerated filer | ☐ |  | Accelerated filer | ☒
Non-accelerated filer | ☐ |  | 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. ☐
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒
Number of registrant's common shares outstanding as of November 3, 2025: 242,146,962

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
FORM 10-Q
September 30, 2025
INDEX

|  | Page
PART I | Financial Information |
Item 1. | Financial Statements (unaudited) | 1
| Condensed Consolidated Balance Sheets — September 30, 2025 and December 31, 2024 | 1
| Condensed Consolidated Statements of Comprehensive Income (Loss) — Three and Nine Months Ended September 30, 2025 and 2024 | 2
| Condensed Consolidated Statements of Shareholders' Equity — Three and Nine Months Ended September 30, 2025 and 2024 | 3
| Condensed Consolidated Statements of Cash Flows — Nine Months Ended September 30, 2025 and 2024 | 5
| Notes to Condensed Consolidated Financial Statements | 7
Item 2. | Management's Discussion and Analysis of Financial Condition and Results of Operations | 27
Item 3. | Quantitative and Qualitative Disclosures About Market Risk | 48
Item 4. | Controls and Procedures | 50
| Warning Concerning Forward-Looking Statements | 51
| Statement Concerning Limited Liability | 53
PART II | Other Information | 54
Item 1A. | Risk Factors | 54
Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds | 54
Item 6. | Exhibits | 54
| Signatures | 56

References in this Quarterly Report on Form 10-Q to the Company, we, us or our include Diversified Healthcare Trust and its consolidated subsidiaries unless otherwise expressly stated or the context indicates otherwise.

Table of Contents
PART I. Financial Information
Item 1. Financial Statements.
DIVERSIFIED HEALTHCARE TRUST
CONDENSED CONSOLIDATED BALANCE SHEETS
(dollars in thousands, except share data)
(unaudited)

|  | September 30, |  | December 31,
|  | 2025 |  | 2024
Assets |  |  |  |
Real estate properties: |  |  |  |
Land |  | $ | 542,403 |  |  | $ | 605,973 |
Buildings and improvements |  | 5,416,972 |  |  | 5,817,279 |
Total real estate properties, gross |  | 5,959,375 |  |  | 6,423,252 |
Accumulated depreciation |  | (2,077,012) |  |  | (2,082,777) |
Total real estate properties, net |  | 3,882,363 |  |  | 4,340,475 |
Investments in unconsolidated joint ventures |  | 112,769 |  |  | 126,859 |
Assets of properties held for sale |  | 258,389 |  |  | 276,270 |
Cash and cash equivalents |  | 201,371 |  |  | 144,584 |
Restricted cash |  | 8,252 |  |  | 5,270 |
Equity method investment |  | 8,240 |  |  | 24,590 |
Acquired real estate leases and other intangible assets, net |  | 21,784 |  |  | 26,300 |
Other assets, net |  | 190,806 |  |  | 192,657 |
Total assets |  | $ | 4,683,974 |  |  | $ | 5,137,005 |
Liabilities and Equity |  |  |  |
Secured revolving credit facility |  | $ | — |  |  | $ | — |
Senior secured notes, net |  | 687,487 |  |  | 826,974 |
Senior unsecured notes, net |  | 1,580,027 |  |  | 1,957,319 |
Secured debt and finance leases, net |  | 455,851 |  |  | 126,611 |
Liabilities of properties held for sale |  | 17,604 |  |  | 6,024 |
Accrued interest |  | 12,408 |  |  | 23,092 |
Other liabilities |  | 241,867 |  |  | 238,142 |
Total liabilities |  | 2,995,244 |  |  | 3,178,162 |
Commitments and contingencies |  |  |  |
Common shares of beneficial interest, $.01 par value: 300,000,000 shares authorized, 242,146,962 and 241,271,703 shares issued and outstanding, respectively |  | 2,421 |  |  | 2,413 |
Additional paid in capital |  | 4,622,061 |  |  | 4,620,313 |
Cumulative net income |  | 1,143,358 |  |  | 1,408,023 |
Cumulative other comprehensive income (loss) |  | 19 |  |  | (17) |
Cumulative distributions |  | (4,079,129) |  |  | (4,071,889) |
Total equity |  | 1,688,730 |  |  | 1,958,843 |
Total liabilities and equity |  | $ | 4,683,974 |  |  | $ | 5,137,005 |

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
1

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
(amounts in thousands, except per share data)
(unaudited)

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Revenues: |  |  |  |  |  |  |  |
Rental income |  | $ | 55,316 |  |  | $ | 61,635 |  |  | $ | 169,041 |  |  | $ | 187,155 |
Residents fees and services |  | 333,390 |  |  | 312,005 |  |  | 989,241 |  |  | 928,653 |
Total revenues |  | 388,706 |  |  | 373,640 |  |  | 1,158,282 |  |  | 1,115,808 |
Expenses: |  |  |  |  |  |  |  |
Property operating expenses |  | 325,387 |  |  | 309,697 |  |  | 952,293 |  |  | 921,366 |
Depreciation and amortization |  | 65,324 |  |  | 68,959 |  |  | 199,915 |  |  | 207,449 |
General and administrative |  | 12,789 |  |  | 13,933 |  |  | 32,966 |  |  | 27,763 |
Acquisition and certain other transaction related costs |  | 1,158 |  |  | 331 |  |  | 1,257 |  |  | 2,243 |
Impairment of assets |  | 93,243 |  |  | 23,031 |  |  | 162,708 |  |  | 41,718 |
Total expenses |  | 497,901 |  |  | 415,951 |  |  | 1,349,139 |  |  | 1,200,539 |
Gain (loss) on sale of properties |  | 1,260 |  |  | 111 |  |  | 103,971 |  |  | (18,976) |
Gain on insurance recoveries |  | — |  |  | — |  |  | 7,522 |  |  | — |
Interest income and other expenses |  | (774) |  |  | 2,575 |  |  | 4,307 |  |  | 7,215 |
Interest expense (including net amortization of debt discounts, premiums and issuance costs of $20,121, $26,188, $66,094 and $76,642, respectively) |  | (48,886) |  |  | (59,443) |  |  | (157,643) |  |  | (175,721) |
Loss on modification or early extinguishment of debt |  | (11,191) |  |  | — |  |  | (40,388) |  |  | (209) |
Loss before income taxes and equity in net earnings (losses) of investees |  | (168,786) |  |  | (99,068) |  |  | (273,088) |  |  | (272,422) |
Income tax expense |  | (337) |  |  | (148) |  |  | (1,229) |  |  | (505) |
Equity in net earnings (losses) of investees |  | 5,083 |  |  | 527 |  |  | 9,652 |  |  | (9,882) |
Net loss |  | $ | (164,040) |  |  | $ | (98,689) |  |  | $ | (264,665) |  |  | $ | (282,809) |
Other comprehensive income: |  |  |  |  |  |  |  |
Equity in unrealized gains of an investee |  | 7 |  |  | 34 |  |  | 59 |  |  | 8 |
Unrealized loss on derivative |  | (6) |  |  | — |  |  | (23) |  |  | — |
Other comprehensive income |  | 1 |  |  | 34 |  |  | 36 |  |  | 8 |
Comprehensive loss |  | $ | (164,039) |  |  | $ | (98,655) |  |  | $ | (264,629) |  |  | $ | (282,801) |
Weighted average common shares outstanding (basic and diluted) |  | 240,385 |  |  | 239,667 |  |  | 240,160 |  |  | 239,396 |
Per common share amounts (basic and diluted): |  |  |  |  |  |  |  |
Net loss |  | $ | (0.68) |  |  | $ | (0.41) |  |  | $ | (1.10) |  |  | $ | (1.18) |

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
2

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
(dollars in thousands)
(unaudited)

|  | Number of Shares |  | Common Shares |  | Additional Paid In Capital |  | Cumulative Net Income |  | Cumulative Other Comprehensive Income (Loss) |  | Cumulative Distributions |  | Total Equity
Balance at December 31, 2024: |  | 241,271,703 |  |  | $ | 2,413 |  |  | $ | 4,620,313 |  |  | $ | 1,408,023 |  |  | $ | (17) |  |  | $ | (4,071,889) |  |  | $ | 1,958,843 |
Net loss |  | — |  |  | — |  |  | — |  |  | (8,986) |  |  | — |  |  | — |  |  | (8,986) |
Other comprehensive income |  | — |  |  | — |  |  | — |  |  | — |  |  | 21 |  |  | — |  |  | 21 |
Distributions |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (2,413) |  |  | (2,413) |
Share grants |  | 33,582 |  |  | — |  |  | 605 |  |  | — |  |  | — |  |  | — |  |  | 605 |
Share repurchases |  | (2,035) |  |  | — |  |  | (6) |  |  | — |  |  | — |  |  | — |  |  | (6) |
Share forfeitures |  | (35,431) |  |  | — |  |  | (13) |  |  | — |  |  | — |  |  | — |  |  | (13) |
Balance at March 31, 2025: |  | 241,267,819 |  |  | 2,413 |  |  | 4,620,899 |  |  | 1,399,037 |  |  | 4 |  |  | (4,074,302) |  |  | 1,948,051 |
Net loss |  | — |  |  | — |  |  | — |  |  | (91,639) |  |  | — |  |  | — |  |  | (91,639) |
Other comprehensive income |  | — |  |  | — |  |  | — |  |  | — |  |  | 14 |  |  | — |  |  | 14 |
Distributions |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (2,413) |  |  | (2,413) |
Share grants |  | 203,987 |  |  | 2 |  |  | 1,067 |  |  | — |  |  | — |  |  | — |  |  | 1,069 |
Share repurchases |  | (38,908) |  |  | (1) |  |  | (102) |  |  | — |  |  | — |  |  | — |  |  | (103) |
Share forfeitures |  | (12,557) |  |  | — |  |  | (6) |  |  | — |  |  | — |  |  | — |  |  | (6) |
Balance at June 30, 2025: |  | 241,420,341 |  |  | 2,414 |  |  | 4,621,858 |  |  | 1,307,398 |  |  | 18 |  |  | (4,076,715) |  |  | 1,854,973 |
Net loss |  | — |  |  | — |  |  | — |  |  | (164,040) |  |  | — |  |  | — |  |  | (164,040) |
Other comprehensive income |  | — |  |  | — |  |  | — |  |  | — |  |  | 1 |  |  | — |  |  | 1 |
Distributions |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (2,414) |  |  | (2,414) |
Share grants |  | 950,895 |  |  | 10 |  |  | 1,159 |  |  | — |  |  | — |  |  | — |  |  | 1,169 |
Share repurchases |  | (218,290) |  |  | (2) |  |  | (952) |  |  | — |  |  | — |  |  | — |  |  | (954) |
Share forfeitures |  | (5,984) |  |  | (1) |  |  | (4) |  |  | — |  |  | — |  |  | — |  |  | (5) |
Balance at September 30, 2025: |  | 242,146,962 |  |  | $ | 2,421 |  |  | $ | 4,622,061 |  |  | $ | 1,143,358 |  |  | $ | 19 |  |  | $ | (4,079,129) |  |  | $ | 1,688,730 |

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
3

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (CONTINUED)
(dollars in thousands)
(unaudited)

|  | Number of Shares |  | Common Shares |  | Additional Paid In Capital |  | Cumulative Net Income |  | Cumulative Other Comprehensive Income (Loss) |  | Cumulative Distributions |  | Total Shareholders' Equity
Balance at December 31, 2023: |  | 240,423,898 |  |  | $ | 2,405 |  |  | $ | 4,618,470 |  |  | $ | 1,778,278 |  |  | $ | — |  |  | $ | (4,062,262) |  |  | $ | 2,336,891 |
Net loss |  | — |  |  | — |  |  | — |  |  | (86,259) |  |  | — |  |  | — |  |  | (86,259) |
Other comprehensive loss |  | — |  |  | — |  |  | — |  |  | — |  |  | (4) |  |  | — |  |  | (4) |
Distributions |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (2,404) |  |  | (2,404) |
Share grants |  | — |  |  | — |  |  | 558 |  |  | — |  |  | — |  |  | — |  |  | 558 |
Share repurchases |  | (30,176) |  |  | (1) |  |  | (78) |  |  | — |  |  | — |  |  | — |  |  | (79) |
Balance at March 31, 2024: |  | 240,393,722 |  |  | 2,404 |  |  | 4,618,950 |  |  | 1,692,019 |  |  | (4) |  |  | (4,064,666) |  |  | 2,248,703 |
Net loss |  | — |  |  | — |  |  | — |  |  | (97,861) |  |  | — |  |  | — |  |  | (97,861) |
Other comprehensive loss |  | — |  |  | — |  |  | — |  |  | — |  |  | (22) |  |  | — |  |  | (22) |
Distributions |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (2,404) |  |  | (2,404) |
Share grants |  | 259,259 |  |  | 3 |  |  | 937 |  |  | — |  |  | — |  |  | — |  |  | 940 |
Share repurchases |  | (17,511) |  |  | (1) |  |  | (41) |  |  | — |  |  | — |  |  | — |  |  | (42) |
Share forfeitures |  | (16,000) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Balance at June 30, 2024: |  | 240,619,470 |  |  | 2,406 |  |  | 4,619,846 |  |  | 1,594,158 |  |  | (26) |  |  | (4,067,070) |  |  | 2,149,314 |
Net loss |  | — |  |  | — |  |  | — |  |  | (98,689) |  |  | — |  |  | — |  |  | (98,689) |
Other comprehensive income |  | — |  |  | — |  |  | — |  |  | — |  |  | 34 |  |  | — |  |  | 34 |
Distributions |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (2,406) |  |  | (2,406) |
Share grants |  | 881,767 |  |  | 9 |  |  | 923 |  |  | — |  |  | — |  |  | — |  |  | 932 |
Share repurchases |  | (219,864) |  |  | (2) |  |  | (779) |  |  | — |  |  | — |  |  | — |  |  | (781) |
Balance at September 30, 2024: |  | 241,281,373 |  |  | $ | 2,413 |  |  | $ | 4,619,990 |  |  | $ | 1,495,469 |  |  | $ | 8 |  |  | $ | (4,069,476) |  |  | $ | 2,048,404 |

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
4

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(dollars in thousands)
(unaudited)

|  | Nine Months Ended September 30,
|  | 2025 |  | 2024
Cash flows from operating activities: |  |  |  |
Net loss |  | $ | (264,665) |  |  | $ | (282,809) |
Adjustments to reconcile net loss to cash provided by operating activities: |  |  |  |
Depreciation and amortization |  | 199,915 |  |  | 207,449 |
Net amortization of debt discounts, premiums and issuance costs |  | 66,094 |  |  | 76,642 |
Payment of accreted interest on senior secured notes |  | (86,992) |  |  | — |
Straight line rental income |  | (759) |  |  | (1,605) |
Amortization of acquired real estate leases and other intangible assets, net |  | 83 |  |  | 84 |
Loss on modification or early extinguishment of debt |  | 40,388 |  |  | 209 |
Impairment of assets |  | 162,708 |  |  | 41,718 |
(Gain) loss on sale of properties |  | (103,971) |  |  | 18,976 |
Gain on insurance recoveries |  | (7,522) |  |  | — |
Other non-cash adjustments, net |  | (10) |  |  | (405) |
Unconsolidated joint venture distributions |  | 250 |  |  | 1,231 |
Equity in net (earnings) losses of investees |  | (9,652) |  |  | 9,882 |
Change in assets and liabilities: |  |  |  |
Deferred leasing costs, net |  | (3,273) |  |  | (2,199) |
Other assets |  | (11,173) |  |  | 2,828 |
Accrued interest |  | (10,684) |  |  | (258) |
Other liabilities |  | 29,755 |  |  | 22,285 |
Net cash provided by operating activities |  | 492 |  |  | 94,028 |
Cash flows from investing activities: |  |  |  |
Real estate improvements |  | (114,389) |  |  | (134,966) |
Proceeds from sale of properties, net |  | 349,382 |  |  | 27,845 |
Investment in AlerisLife Inc. |  | — |  |  | (15,459) |
Equity method investment distributions |  | 48,400 |  |  | — |
Contributions to unconsolidated joint ventures |  | (8,500) |  |  | — |
Proceeds from insurance recoveries |  | 1,308 |  |  | 1,698 |
Purchase of interest rate cap |  | (47) |  |  | — |
Net cash provided by (used in) investing activities |  | 276,154 |  |  | (120,882) |
Cash flows from financing activities: |  |  |  |
Proceeds from issuance of senior secured notes, net |  | 369,375 |  |  | — |
Proceeds from mortgage notes payable |  | 343,157 |  |  | 120,000 |
Redemption of senior secured notes |  | (483,368) |  |  | — |
Redemption of senior unsecured notes |  | (380,000) |  |  | (60,000) |
Repayment of other debt |  | (2,728) |  |  | (2,388) |
Early extinguishment of debt settled in cash |  | (35,804) |  |  | — |
Payment of debt issuance costs |  | (19,206) |  |  | (8,203) |
Repurchase of common shares |  | (1,063) |  |  | (902) |
Distributions to shareholders |  | (7,240) |  |  | (7,214) |
Net cash (used in) provided by financing activities |  | (216,877) |  |  | 41,293 |
Increase in cash and cash equivalents and restricted cash |  | 59,769 |  |  | 14,439 |
Cash and cash equivalents and restricted cash at beginning of period |  | 149,854 |  |  | 246,961 |
Cash and cash equivalents and restricted cash at end of period |  | $ | 209,623 |  |  | $ | 261,400 |

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
5

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (CONTINUED)
(dollars in thousands)
(unaudited)

|  | Nine Months Ended September 30,
|  | 2025 |  | 2024
Supplemental cash flow information: |  |  |  |
Interest paid (1) |  | $ | 189,225 |  |  | $ | 99,337 |
Income taxes paid |  | $ | 626 |  |  | $ | 484 |
Non-cash investing activities: |  |  |  |
Real estate improvements accrued, not paid |  | $ | 15,474 |  |  | $ | 18,603 |

(1)Includes $86,992 of accreted interest paid during the nine months ended September 30, 2025 on our senior secured notes due 2026.
Supplemental disclosure of cash and cash equivalents and restricted cash:
The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within our condensed consolidated balance sheets to the amount shown in our condensed consolidated statements of cash flows:

|  | As of September 30,
|  | 2025 |  | 2024
Cash and cash equivalents |  | $ | 201,371 |  |  | $ | 256,527 |
Restricted cash (1) |  | 8,252 |  |  | 4,873 |
Total cash and cash equivalents and restricted cash shown in our condensed consolidated statements of cash flows |  | $ | 209,623 |  |  | $ | 261,400 |

(1)Restricted cash consists of amounts escrowed for real estate taxes, insurance and capital expenditures at certain of our mortgaged properties.
The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
6

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
Note 1. Basis of Presentation
The accompanying condensed consolidated financial statements of Diversified Healthcare Trust and its subsidiaries, or DHC, we, us, or our, are unaudited. Certain information and disclosures required by U.S. generally accepted accounting principles, or GAAP, for complete financial statements have been condensed or omitted. We believe the disclosures made are adequate to make the information presented not misleading. However, the accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes contained in our Annual Report on Form 10-K for the year ended December 31, 2024, or our Annual Report.
In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair statement of results for the interim period have been included. All intercompany transactions and balances with or among our consolidated subsidiaries have been eliminated. Operating results for interim periods are not necessarily indicative of the results that may be expected for the full year.
The preparation of these financial statements in conformity with GAAP requires us to make estimates and assumptions that affect reported amounts. Actual results could differ from those estimates. Significant estimates in our condensed consolidated financial statements include purchase price allocations, useful lives of fixed assets and impairments of real estate and intangible assets.
We have been, are currently, and expect in the future to be involved in claims, lawsuits, and regulatory and other governmental audits, investigations and proceedings arising in the ordinary course of our business. While the outcome of any litigation is inherently uncertain, we do not believe any currently pending litigation or proceedings will have a material adverse effect on our financial condition, results of operations or cash flows.
Note 2. Recent Accounting Pronouncements
On December 14, 2023, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, or ASU No. 2023-09, which requires public entities to enhance their annual income tax disclosures by requiring: (i) consistent categories and greater disaggregation of information in the rate reconciliation, and (ii) income taxes paid disaggregated by jurisdiction. ASU No. 2023-09 should be applied prospectively but entities have the option to apply it retrospectively to all prior periods presented in the financial statements. ASU No. 2023-09 is effective for annual periods beginning after December 15, 2024, with early adoption permitted. We expect to include additional disclosures in the notes to our condensed consolidated financial statements as a result of the implementation of ASU No. 2023-09; however, these changes are not expected to have a material effect on our condensed consolidated financial statements.
In November 2024, the FASB issued ASU No. 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statements Expenses, or ASU No. 2024-03, which requires public entities to disclose specific expense categories such as employee compensation, depreciation and intangible asset amortization. These details must be presented in a tabular format in the notes to condensed consolidated financial statements for both interim and annual reporting periods. ASU 2024-03 is required to be applied prospectively but can be applied retrospectively, and is effective for the first annual reporting periods beginning after December 15, 2026, and interim reporting periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. We are currently evaluating the impact that ASU 2024-03 will have on our condensed consolidated financial statements.
Note 3. Real Estate and Other Investments
As of September 30, 2025, we owned 335 properties located in 34 states and Washington, D.C., including 50 properties classified as held for sale, and we owned an equity interest in each of two unconsolidated joint ventures that own medical office and life science properties located in five states.
Dispositions:
The table below represents the sale prices, excluding closing costs, of our dispositions for the nine months ended September 30, 2025. We do not believe these sales represent a strategic shift in our business. As a result, the results of
7

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
operations for these properties are included in continuing operations through the date of sale of such properties in our condensed consolidated statements of comprehensive income (loss).

Date of Sale |  | State |  | Type of Property |  | Number of Properties |  |  |  |  | Sales Price |  | Gain (Loss) on Sale |  |
January 2025 |  | Delaware |  | Senior Living (SHOP) |  | 1 |  |  |  |  | $ | 2,900 |  |  | $ | 1,263 |  |  |
January 2025 |  | California |  | Life Science (1) |  | 3 |  |  |  |  | 159,025 |  |  | 9,723 |  |  |
February 2025 |  | Arizona |  | Life Science |  | 1 |  |  |  |  | 16,800 |  |  | 65 |  |  |
February 2025 |  | Various |  | Senior Living (1) |  | 18 |  |  |  |  | 135,000 |  |  | 97,560 |  |  |
March 2025 |  | Connecticut |  | Medical Office (1) |  | 1 |  |  |  |  | 7,100 |  |  | 1,529 |  |  |
May 2025 |  | Tennessee |  | Senior Living (SHOP) |  | 1 |  |  |  |  | 11,150 |  |  | (5,261) |  |  |
May 2025 |  | Missouri |  | Medical Office |  | 1 |  |  |  |  | 5,250 |  |  | (2,168) |  |  |
July 2025 |  | Wisconsin |  | Medical Office |  | 1 |  |  |  |  | 500 |  |  | (34) |  |  |
July 2025 |  | Montana |  | Medical Office |  | 1 |  |  |  |  | 4,300 |  |  | 31 |  |  |
July 2025 |  | New Jersey |  | All Other |  | 1 |  |  |  |  | 4,000 |  |  | 1,554 |  |  |
August 2025 |  | Pennsylvania |  | Medical Office |  | 1 |  |  |  |  | 1,800 |  |  | (19) |  |  |
September 2025 |  | Georgia |  | Senior Living (SHOP) |  | 1 |  |  |  |  | 1,600 |  |  | (218) |  |  |
September 2025 |  | Maryland |  | Medical Office |  | 1 |  |  |  |  | 4,250 |  |  | (54) |  |  |
|  |  |  |  |  | 32 |  |  |  |  | $ | 353,675 |  |  | $ | 103,971 |  |  |

(1)We used aggregate net proceeds of $299,158 from the sales of these properties to partially redeem our outstanding senior secured notes due 2026.
As of September 30, 2025, we had 50 properties classified as held for sale in our condensed consolidated balance sheet as follows:

Segment |  | Number of Properties |  | Real Estate Properties, Net |  |
SHOP |  | 29 |  | $ | 94,778 |  |  |
Medical Office and Life Science |  | 21 |  | 139,609 |  |  |
|  | 50 |  | $ | 234,387 |  |  |

Subsequent to September 30, 2025, we sold 12 properties for an aggregate sales price of $42,130, excluding closing costs. In October 2025, we used net proceeds of $10,249 from the sale of one of these properties to partially redeem our outstanding senior secured notes due 2026. As of November 3, 2025, we had 38 properties under agreements or letters of intent to sell for an aggregate sales price of $237,219, excluding closing costs. The net proceeds from the sales of 12 of these properties, which have an expected aggregate sales price of $90,529, excluding closing costs, are required to be used to partially redeem our outstanding senior secured notes due 2026, if the sales of such properties are completed. We may not complete the sales of any or all of the properties we currently plan to sell. Also, we may sell some or all of these properties at amounts that are less than currently expected and/or less than the carrying values of such properties, and we may incur losses on any such sales as a result.
Impairment:
We regularly evaluate our assets for indicators of impairment. Impairment indicators may include declining tenant or resident occupancy, weak or declining profitability from the property, decreasing tenant cash flows or liquidity, our decision to dispose of an asset before the end of its estimated useful life and legislative, market or industry changes that could permanently reduce the value of an asset. If indicators of impairment are present, we evaluate the carrying value of the affected assets by comparing it to the expected future undiscounted cash flows to be generated from those assets. The future cash flows are subjective and are based in part on assumptions regarding hold periods, market rents and terminal capitalization rates. If the
8

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
sum of these expected future cash flows is less than the carrying value, we reduce the net carrying value of the asset to its estimated fair value.
During the nine months ended September 30, 2025, we recorded impairment charges of $109,597 to adjust the carrying value of 18 medical office and life science properties to their estimated fair values. We sold five of these properties during the nine months ended September 30, 2025. The remaining 13 properties were classified as held for sale in our condensed consolidated balance sheet as of September 30, 2025. During the nine months ended September 30, 2025, we also recorded impairment charges of $53,111 to adjust the carrying value of 25 senior living communities in our senior housing operating portfolio, or SHOP, to their estimated fair values. We sold one of these communities during the nine months ended September 30, 2025. The remaining 24 communities were classified as held for sale in our condensed consolidated balance sheet as of September 30, 2025.
Investments and Capital Expenditures:
The following is a summary of capital expenditures, development, redevelopment and other activities for the periods presented:

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
SHOP fixed assets and capital improvements |  | $ | 33,306 |  |  | $ | 27,923 |  |  | $ | 78,704 |  |  | $ | 59,637 |
Medical Office and Life Science Portfolio capital expenditures: |  |  |  |  |  |  |  |
Lease related costs (1) |  | 4,961 |  |  | 3,504 |  |  | 12,336 |  |  | 15,942 |
Building improvements (2) |  | 2,295 |  |  | 1,359 |  |  | 5,337 |  |  | 4,130 |
Recurring capital expenditures - Medical Office and Life Science Portfolio |  | 7,256 |  |  | 4,863 |  |  | 17,673 |  |  | 20,072 |
Wellness centers lease related costs (1) |  | — |  |  | 5,488 |  |  | — |  |  | 17,002 |
Total recurring capital expenditures |  | $ | 40,562 |  |  | $ | 38,274 |  |  | $ | 96,377 |  |  | $ | 96,711 |
Development, redevelopment and other activities - SHOP (3) |  | $ | 1,865 |  |  | $ | 11,714 |  |  | $ | 12,093 |  |  | $ | 18,608 |
Development, redevelopment and other activities - Medical Office and Life Science Portfolio (3) |  | 175 |  |  | 537 |  |  | 175 |  |  | 2,362 |
Total development, redevelopment and other activities |  | $ | 2,040 |  |  | $ | 12,251 |  |  | $ | 12,268 |  |  | $ | 20,970 |
Capital expenditures by segment: |  |  |  |  |  |  |  |
SHOP |  | $ | 35,171 |  |  | $ | 39,637 |  |  | $ | 90,797 |  |  | $ | 78,245 |
Medical Office and Life Science Portfolio |  | 7,431 |  |  | 5,400 |  |  | 17,848 |  |  | 22,434 |
All Other - wellness centers |  | — |  |  | 5,488 |  |  | — |  |  | 17,002 |
Total capital expenditures |  | $ | 42,602 |  |  | $ | 50,525 |  |  | $ | 108,645 |  |  | $ | 117,681 |

(1)Includes capital expenditures to improve tenants' space or amounts paid directly to tenants to improve their space and other leasing related costs, such as brokerage commissions and tenant inducements.
(2)Includes capital expenditures to replace obsolete building components that extend the useful life of existing assets or other improvements to increase the marketability of the property.
(3)Includes capital expenditures that reposition a property or result in change of use or new sources of revenue.
9

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
Equity Method Investments in Unconsolidated Joint Ventures:
As of September 30, 2025, we had equity investments in unconsolidated joint ventures as follows:

Equity Method Investments in Joint Venture |  | DHC Ownership |  | DHC Carrying Value of Investment at September 30, 2025 |  | Number of Properties |  | State |  | Square Feet
Seaport Innovation LLC |  | 10% |  | $ | 67,060 |  |  | 1 |  | MA |  | 1,134,479 |
The LSMD Fund REIT LLC |  | 20% |  | 45,709 |  |  | 10 |  | CA, MA, NY, TX, WA |  | 1,068,763 |
|  |  |  | $ | 112,769 |  |  | 11 |  |  |  | 2,203,242 |

The following table provides a summary of the mortgage debts of these joint ventures as of September 30, 2025:

Joint Venture |  | Coupon Rate |  | Maturity Date |  | Principal Balance (1)
Mortgage Notes Payable (secured by one property in Massachusetts) (2) (3) |  | 5.60% |  | 9/1/2030 |  | $ | 1,000,000 |
Mortgage Notes Payable (secured by nine properties in five states) (4) |  | 3.46% |  | 2/11/2032 |  | 189,800 |
Mortgage Notes Payable (secured by one property in California) (4) (5) |  | 6.14% |  | 2/9/2026 |  | 266,825 |
|  | 5.40% |  |  |  | $ | 1,456,625 |

(1)Amounts are not adjusted for our minority equity interest.
(2)We provide certain limited recourse guaranties on this debt, with our liability limited to $100,000.
(3)Reflects August 2025 refinancing of the previous mortgage loan with an original principal balance of $620,000.
(4)The debt securing these properties is non-recourse to us.
(5)The joint venture has one remaining one-year extension option for the maturity date of this mortgage loan, subject to satisfaction of certain conditions, and this mortgage loan requires that interest be paid at an annual rate of the one-month term secured overnight financing rate, or SOFR, plus a premium of 1.90%. The joint venture has purchased an interest rate cap through February 2026 with a SOFR strike rate equal to 5.74%.
We account for the unconsolidated joint venture for 10 medical office and life science properties in which we own a 20% equity interest, or the LSMD JV, and the unconsolidated joint venture for a life science property located in Boston, Massachusetts in which we own a 10% equity interest, or the Seaport JV, using the equity method of accounting under the fair value option. We recognized changes in the fair value of our investments in our unconsolidated joint ventures of $1,869 and $1,707 during the three months ended September 30, 2025 and 2024, respectively, and $5,661 and $(18,173) during the nine months ended September 30, 2025 and 2024, respectively. These amounts are included in equity in net earnings (losses) of investees in our condensed consolidated statements of comprehensive income (loss). On August 21, 2025, the Seaport JV paid an aggregate cash distribution of $280,000 to its investors in connection with the refinancing of its prior mortgage loan in August 2025. Our pro rata share of this cash distribution was $28,000 and our basis in the equity method investment in the Seaport JV was reduced by such amount. See Note 6 for further information regarding the valuation of our investment in these joint ventures.
Equity Method Investment in AlerisLife:
As of September 30, 2025, we owned approximately 34.0% of the outstanding common shares of AlerisLife Inc., or AlerisLife. We do not control the activities that are most significant to AlerisLife and, as a result, we account for our non-controlling interest in AlerisLife using the equity method of accounting.
As of September 30, 2025, our investment in AlerisLife had a carrying value of $8,240. The cost basis of our investment in AlerisLife exceeded our proportionate share of AlerisLife's total stockholders' equity book value on the date of acquisition of our initial interest in AlerisLife, which was February 16, 2024, by an aggregate of $29,500. As required under GAAP, we are amortizing this difference to equity in earnings of an investee over 21 years, the weighted average remaining useful life of the real estate assets owned by AlerisLife and the intangible contract asset with us as of the date of acquisition. We recorded amortization of the basis difference of $351 and $351 for the three months ended September 30, 2025 and 2024, respectively, and $1,053 and $877 for the nine months ended September 30, 2025 and 2024, respectively. We recognized income of $2,863 and $(1,531) related to our investment in AlerisLife for the three months ended September 30, 2025 and 2024, respectively, and $2,938 and $7,414 for the nine months ended September 30, 2025 and 2024, respectively. These amounts are included in equity
10

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
in net earnings (losses) of investees in our condensed consolidated statements of comprehensive income (loss). On February 14, 2025, AlerisLife paid an aggregate cash dividend of $50,000 to its stockholders. Our pro rata share of this cash dividend was $17,000 and our basis in the equity method investment in AlerisLife was reduced by such amount. On July 15, 2025, AlerisLife paid an aggregate cash dividend of $10,000 to its stockholders. Our pro rata share of this cash dividend was $3,400 and our basis in the equity method investment in AlerisLife was reduced by such amount. See Note 11 for further information regarding our investment in AlerisLife.
Other:
In September 2022, certain of our managed senior living communities located in Florida experienced hurricane related damage. We carry comprehensive property, casualty, flood and business interruption insurances which covered our losses at these senior living communities, subject to a deductible. During the nine months ended September 30, 2025, we recognized a gain on insurance recoveries of $7,522 as a result of insurance proceeds received for these damaged senior living communities and the closing of the associated claim.
Note 4. Leases
We are a lessor of medical office and life science properties, senior living communities and other healthcare related properties. Our leases provide our tenants with the contractual right to use and economically benefit from all of the premises demised under the leases; therefore, we have determined to evaluate our leases as lease arrangements.
Our leases provide for base rent payments and, in addition, may include variable payments. Rental income from operating leases, including any payments derived by index or market based indices, is recognized on a straight line basis over the lease term when we have determined that the collectability of substantially all of the lease payments is probable. Some of our leases have options to extend or terminate the lease exercisable at the option of our tenants, which are considered when determining the lease term.
We increased rental income to record revenue on a straight line basis by $450 and $658 for the three months ended September 30, 2025 and 2024, respectively, and $759 and $1,605 for the nine months ended September 30, 2025 and 2024, respectively. Rents receivable, excluding receivables related to our properties classified as held for sale, if any, include $62,056 and $69,814 of straight line rent receivables at September 30, 2025 and December 31, 2024, respectively, and are included in other assets, net in our condensed consolidated balance sheets.
We do not include in our measurement of our lease receivables certain variable payments, including changes in the index or market based indices after the inception of the lease, certain tenant reimbursements and other income until the specific events that trigger the variable payments have occurred. Such payments totaled $10,098 and $11,126 for the three months ended September 30, 2025 and 2024, respectively, of which tenant reimbursements totaled $10,064 and $11,083, respectively, and $30,748 and $34,111 for the nine months ended September 30, 2025 and 2024, respectively, of which tenant reimbursements totaled $30,255 and $33,953, respectively.
Right of Use Asset and Lease Liability: For leases where we are the lessee, we recognize a right of use asset and a lease liability equal to the present value of the minimum lease payments, with rental payments being applied to the lease liability and the right of use asset being amortized over the term of the lease. The values of the right of use assets and related liabilities representing our future obligation under the respective lease arrangements for which we are the lessee were $17,423 and $17,810, respectively, as of September 30, 2025, and $20,025 and $20,411, respectively, as of December 31, 2024. The right of use assets and related lease liabilities are included within other assets, net and other liabilities, respectively, within our condensed consolidated balance sheets. In addition, we lease equipment at certain of our managed senior living communities. These leases are short term in nature, are cancelable with no fee or do not result in an annual expense in excess of our capitalization policy and, as a result, are not recorded on our condensed consolidated balance sheets.
11

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
Note 5. Indebtedness
At September 30, 2025 and December 31, 2024, our outstanding indebtedness consisted of the following:
Senior Unsecured Notes:

|  |  |  |  |  | Principal Balance as of
|  | Coupon Rate |  | Maturity |  | September 30, 2025 |  | December 31, 2024
Senior unsecured notes |  | 9.750% |  | June 2025 |  | $ | — |  |  | $ | 380,000 |
Senior unsecured notes |  | 4.750% |  | February 2028 |  | 500,000 |  |  | 500,000 |
Senior unsecured notes (1) |  | 4.375% |  | March 2031 |  | 500,000 |  |  | 500,000 |
Senior unsecured notes |  | 5.625% |  | August 2042 |  | 350,000 |  |  | 350,000 |
Senior unsecured notes |  | 6.250% |  | February 2046 |  | 250,000 |  |  | 250,000 |
Total |  |  |  |  |  | 1,600,000 |  |  | 1,980,000 |
Unamortized discount |  |  |  |  |  | (2,006) |  |  | (2,639) |
Unamortized debt issuance costs |  |  |  |  |  | (17,967) |  |  | (20,042) |
Senior unsecured notes, net |  |  |  |  |  | $ | 1,580,027 |  |  | $ | 1,957,319 |

(1)These notes are fully and unconditionally guaranteed, on a joint, several and unsecured basis, by all of our subsidiaries except certain excluded subsidiaries. The notes and related guarantees are effectively subordinated to all of our and the subsidiary guarantors' secured indebtedness, respectively, to the extent of the value of the applicable collateral, and are structurally subordinated to all indebtedness and other liabilities and any preferred equity of any of our subsidiaries that do not guarantee the notes.
Secured and Other Debt:

|  | Number of Properties Securing at |  | Principal Balance as of (1) |  |  |  |  |  | Net Book Value of Collateral as of
|  | September 30, 2025 |  | December 31, 2024 |  | September 30, 2025 |  | December 31, 2024 |  | Interest Rate |  | Maturity |  | September 30, 2025 |  | December 31, 2024
Secured revolving credit facility |  | 14 |  |  | — |  |  | $ | — |  |  | $ | — |  |  | 6.84 | % |  | June 2029 |  | $ | 327,475 |  |  | $ | — |
Senior secured notes(2)(3) |  | 58 |  |  | 95 |  |  | 334,370 |  |  | 940,534 |  |  | 0.00 | % |  | January 2026 |  | 617,410 |  |  | 1,064,171 |
Senior secured notes(4) |  | 36 |  |  | — |  |  | 375,000 |  |  | — |  |  | 7.25 | % |  | October 2030 |  | 406,715 |  |  | — |
Floating rate mortgage loan (5) |  | 14 |  |  | — |  |  | 140,000 |  |  | — |  |  | 6.63 | % |  | March 2028 |  | 144,694 |  |  | — |
Mortgage note |  | 4 |  |  | — |  |  | 63,757 |  |  | — |  |  | 6.57 | % |  | June 2030 |  | 136,169 |  |  | — |
Mortgage note |  | 8 |  |  | 8 |  |  | 120,000 |  |  | 120,000 |  |  | 6.86 | % |  | June 2034 |  | 184,383 |  |  | 191,186 |
Mortgage notes (6) |  | 7 |  |  | — |  |  | 108,873 |  |  | — |  |  | 6.22 | % |  | May 2035 |  | 149,689 |  |  | — |
Mortgage notes (7) |  | 2 |  |  | — |  |  | 30,284 |  |  | — |  |  | 6.36 | % |  | June 2035 |  | 35,192 |  |  | — |
Mortgage note |  | 1 |  |  | 1 |  |  | 6,261 |  |  | 7,464 |  |  | 6.44 | % |  | July 2043 |  | 13,009 |  |  | 13,097 |
Finance Leases |  | 2 |  |  | 2 |  |  | 1,056 |  |  | 2,338 |  |  | 7.70 | % |  | April 2026 |  | 20,546 |  |  | 21,606 |
Total |  | 146 |  |  | 106 |  |  | 1,179,601 |  |  | 1,070,336 |  |  |  |  |  |  | $ | 2,035,282 |  |  | $ | 1,290,060 |
Unamortized discount |  |  |  |  |  | (10,398) |  |  | (101,035) |  |  |  |  |  |  |  |  |
Unamortized debt issuance costs (8) |  |  |  |  |  | (25,865) |  |  | (15,716) |  |  |  |  |  |  |  |  |
Total secured and other debt, net |  |  |  |  |  | $ | 1,143,338 |  |  | $ | 953,585 |  |  |  |  |  |  |  |  |

(1)The principal balances are the amounts stated in the contracts. In accordance with GAAP, our carrying values and recorded interest expense may be different because of market conditions at the time we assumed certain of these debts.
(2)These notes are fully and unconditionally guaranteed, on a joint, several and senior secured basis by certain of our subsidiaries that own 58 properties, or the 2026 Collateral Guarantors, and on a joint, several and unsecured basis, by all of our subsidiaries other
12

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
than the 2026 Collateral Guarantors and certain excluded subsidiaries. These notes and the guarantees provided by the 2026 Collateral Guarantors are secured by a first priority lien on and security interest in each of the collateral properties and 100% of the equity interests in each of the 2026 Collateral Guarantors. The unsecured guarantees related to these notes are effectively subordinated to all of the subsidiary guarantors' secured indebtedness to the extent of the value of the applicable collateral, and the notes and related guarantees are structurally subordinated to all indebtedness and other liabilities and any preferred equity of any of our subsidiaries that do not guarantee the notes.
(3)We have a one-time option to extend the maturity date of these senior secured notes by one year, to January 15, 2027, subject to satisfaction of certain conditions and payment of an extension fee. If we exercise this option, interest payments will be due semiannually during the extension period at an initial interest rate of 11.25% with increases of 50 basis points every 90 days these senior secured notes remain outstanding.
(4)These notes are fully and unconditionally guaranteed, on a joint, several and senior secured basis by certain of our subsidiaries that own 36 properties, or the 2030 Collateral Guarantors, and on a joint, several and unsecured basis, by all of our subsidiaries other than the 2030 Collateral Guarantors and certain excluded subsidiaries. These notes and the guarantees provided by the 2030 Collateral Guarantors are secured by a first priority lien on and security interest in 100% of the equity interests in each of the 2030 Collateral Guarantors. The unsecured guarantees related to these notes are effectively subordinated to all of the subsidiary guarantors' secured indebtedness to the extent of the value of the applicable collateral, and the notes and related guarantees are structurally subordinated to all indebtedness and other liabilities and any preferred equity of any of our subsidiaries that do not guarantee the notes.
(5)This mortgage loan requires that interest be paid at an annual rate of SOFR plus a premium of 2.50% with interest-only payments through April 2027, and we have two six-month extension options of the interest-only period, subject to satisfaction of certain conditions. In connection with this mortgage loan, we have purchased an interest rate cap with a SOFR strike rate equal to 4.50% pursuant to the terms of the applicable loan agreement.
(6)These mortgage loans require interest-only payments through May 2030.
(7)These mortgage loans require interest-only payments through June 2028.
(8)Excludes unamortized debt issuance costs for our revolving credit facility as these costs are included in other assets, net in our condensed consolidated balance sheets.
As of September 30, 2025, all $500,000 of our 4.375% senior notes due 2031 were fully and unconditionally guaranteed, on a joint, several and unsecured basis, by all of our subsidiaries except certain excluded subsidiaries. The notes and related guarantees are effectively subordinated to all of our and the subsidiary guarantors' secured indebtedness, respectively, to the extent of the value of the applicable collateral, and the notes and related guarantees are structurally subordinated to all indebtedness and other liabilities and any preferred equity of any of our subsidiaries that do not guarantee the notes. Our remaining $1,100,000 of senior unsecured notes do not have the benefit of any guarantees as of September 30, 2025.
No cash interest is due on these notes prior to maturity. The accreted value of these notes will increase at a rate of 11.25% per annum compounded semiannually on January 15 and July 15 of each year, such that the accreted value will equal the principal amount at maturity. We recognized discount accretion of $16,313 and $22,034 for the three months ended September 30, 2025 and 2024, respectively, and $54,742 and $64,133 for the nine months ended September 30, 2025 and 2024, respectively, for our senior secured notes due 2026 in interest expense in our condensed consolidated statements of comprehensive income (loss). As of November 3, 2025, we are under agreements or letters of intent to sell 12 additional properties that secure our senior secured notes due 2026 for an expected aggregate sales price of $90,529, excluding closing costs. The net proceeds from these sales are required to be used to partially redeem these senior secured notes, if these sales are completed.
13

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
The table below represents our indebtedness repayments, excluding scheduled payments on amortizing debt, for the nine months ended September 30, 2025:

Date |  | Debt Instrument |  | Secured Property Count |  | Interest Rate |  | Original Maturity Date |  | Outstanding Principal Balance |  | Repayment Amount |  | Remaining Principal Balance |  | Loss on Modification or Early Extinguishment of Debt
Repayments during the nine months ended September 30, 2025: |  |
March 2025 (1) |  | Senior secured notes |  | 73 |  | 0.00% |  | January 2026 |  | $ | 940,534 |  |  | $ | 299,158 |  |  | $ | 641,376 |  |  | $ | 29,071 |
April 2025 |  | Senior unsecured notes |  | — |  | 9.75% |  | June 2025 |  | $ | 380,000 |  |  | 140,000 |  |  | $ | 240,000 |  |  | 82 |
May 2025 |  | Senior unsecured notes |  | — |  | 9.75% |  | June 2025 |  | $ | 240,000 |  |  | 140,000 |  |  | $ | 100,000 |  |  | 44 |
June 2025 |  | Senior unsecured notes |  | — |  | 9.75% |  | June 2025 |  | $ | 100,000 |  |  | 100,000 |  |  | $ | — |  |  | — |
September 2025 (2) |  | Senior secured notes |  | 58 |  | 0.00% |  | January 2026 |  | $ | 641,376 |  |  | 307,006 |  |  | $ | 334,370 |  |  | 11,191 |
Total |  |  |  |  |  |  |  |  |  |  |  | $ | 986,164 |  |  |  |  | $ | 40,388 |

(1)During the nine months ended September 30, 2025, we sold 22 properties that secured our senior secured notes due 2026. We used aggregate net proceeds of $299,158 from the sales of these properties to partially redeem these senior secured notes.
(2)In September 2025, we redeemed a portion of our senior secured notes due 2026 for a redemption price equal to the principal amount of $307,006. As a result of this partial redemption, 15 of the properties that secured these senior secured notes were released. There are now first priority liens on and security interests in 100% of the equity interests in the subsidiaries owning these 15 properties that secure our 7.25% senior secured notes due 2030.
In March 2025, we executed a $140,000 floating rate mortgage loan secured by 14 SHOP communities. This mortgage loan matures in March 2028 and requires that interest be paid at an annual rate of SOFR plus a premium of 2.50% with interest-only payments through April 2027.
In April 2025, we executed a $108,873 fixed rate mortgage financing secured by seven SHOP communities. These mortgage loans mature in May 2035 and require that interest be paid at an annual rate of 6.22% with interest-only payments through May 2030.
In May 2025, we executed a $64,000 fixed rate mortgage loan secured by four SHOP communities. This mortgage loan matures in June 2030 and requires that interest be paid at an annual rate of 6.57%.
In May 2025, we executed a $30,284 fixed rate mortgage financing secured by two SHOP communities. These mortgage loans mature in June 2035 and require that interest be paid at an annual rate of 6.36% with interest-only payments through June 2028.
From April through June 2025, we used the net proceeds from the 2025 mortgage financings, together with cash on hand, to fully redeem the remaining $380,000 principal balance of our 9.75% senior unsecured notes due June 2025.
In June 2025, we obtained a $150,000 revolving credit facility secured by 14 senior living communities in our SHOP segment. Our revolving credit facility is available for general business purposes, including acquisitions. We can borrow, repay and reborrow funds available under our revolving credit facility, and no principal repayments are due, until maturity. Availability of borrowings under the agreement governing our revolving credit facility, or our credit agreement, is subject to satisfying certain financial covenants and other credit facility conditions. Our revolving credit facility matures in June 2029 and we have two six-month extension options for the maturity date of the facility, subject to satisfaction of certain conditions and payment of an extension fee.
In September 2025, we issued $375,000 in aggregate principal amount of our 7.25% senior secured notes due 2030 in a private offering raising net proceeds of $364,726, after deducting discounts and commissions to the initial purchasers and other estimated fees and expenses. These notes require semi-annual interest payments through maturity. We used the net proceeds from the offering to partially redeem $307,006 of our then outstanding $641,376 senior secured notes due 2026. As a result of
14

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
this partial redemption, we recorded a loss on modification or early extinguishment of debt of $11,191 for the three months ended September 30, 2025.
Interest payable on borrowings under our revolving credit facility is based on SOFR plus a premium of 2.50% to 3.00%, depending on our net leverage ratio, as defined in our credit agreement, which was 2.50% as of September 30, 2025. We also pay an unused commitment fee of 25 to 35 basis points per annum based on amounts outstanding under our revolving credit facility. As of September 30, 2025, the annual interest rate payable on borrowings under our revolving credit facility was 6.84%. As of September 30, 2025 and November 3, 2025, we had no borrowings under our revolving credit facility and $150,000 available for borrowings.
Interest on our senior unsecured notes and our 7.25% senior secured notes due 2030 is payable either semiannually or quarterly in arrears; however, no principal repayments are due until maturity. No interest is payable on our senior secured notes due 2026, with any principal amount outstanding due at maturity. Our mortgage loan maturing in June 2034 requires monthly interest payments and no principal payment is due until maturity, while our mortgage loans maturing in March 2028, May 2035 and June 2035 require monthly interest payments and no principal payment is due for a specified amount of time. Our mortgage loans maturing in June 2030 and July 2043 require monthly principal and interest payments. Payments under our finance leases are due monthly. We include amortization of finance lease assets in depreciation and amortization expense.
Our credit agreement, our mortgage loan agreements and our senior notes indentures and their supplements provide for acceleration of payment of all amounts outstanding upon the occurrence and continuation of certain events of default. Our credit agreement and our senior notes indentures and their supplements also contain covenants that restrict our ability to incur debts, including debts secured by mortgages on our properties, in excess of calculated amounts and require us to maintain various financial ratios. Borrowings under our revolving credit facility are subject to satisfying certain financial covenants and other credit facility conditions. We believe we were in compliance with the terms and conditions of our debt agreements as of September 30, 2025.
Note 6. Fair Value of Assets and Liabilities
The following table presents certain of our assets that are measured at fair value at September 30, 2025 and December 31, 2024, categorized by the level of inputs as defined in the fair value hierarchy under GAAP, used in the valuation of each asset.

|  | As of September 30, 2025 |  | As of December 31, 2024
Description |  | Carrying Value |  |  |  | Carrying Value |  |
Recurring Fair Value Measurements Assets: |  |  |  |  |  |  |  |
Investment in unconsolidated joint venture (Level 3) (1) |  | $ | 67,060 |  |  |  |  | $ | 81,949 |  |  |
Investment in unconsolidated joint venture (Level 3) (2) |  | $ | 45,709 |  |  |  |  | $ | 44,910 |  |  |
Interest rate cap (Level 2) (3) |  | $ | 1 |  |  |  |  | $ | — |  |  |
Non-Recurring Fair Value Measurements Assets: |  |  |  |  |  |  |  |
Real estate properties held for sale (Level 2) (4) |  | $ | 129,922 |  |  |  |  | $ | — |  |  |

(1)The 10% equity interest we own in the Seaport JV is included in investments in unconsolidated joint ventures in our condensed consolidated balance sheet, and is reported at fair value, which is based on significant unobservable inputs (Level 3 inputs). The significant unobservable inputs used in the fair value analysis are a discount rate of 7.00%, an exit capitalization rate of 6.00%, a holding period of 10 years and market rents. The assumptions made in the fair value analysis are based on the location, type and nature of the property, and current and anticipated market conditions. See Note 3 for further information regarding this joint venture.
(2)The 20% equity interest we own in the LSMD JV is included in investments in unconsolidated joint ventures in our condensed consolidated balance sheet, and is reported at fair value, which is based on significant unobservable inputs (Level 3 inputs). The significant unobservable inputs used in the fair value analysis are discount rates of between 6.25% and 8.75%, exit capitalization rates of between 5.25% and 8.00%, holding periods of 10 years and market rents. The assumptions we made in the fair value analysis are based on the location, type and nature of each property, and current and anticipated market conditions. See Note 3 for further information regarding this joint venture.
(3)The fair value of our interest rate cap derivative is based on prevailing market prices in secondary markets for similar derivative contracts as of the measurement date.
(4)We have assets in our condensed consolidated balance sheets that are measured at fair value on a non-recurring basis. During the three months ended September 30, 2025, we recorded impairment charges of $57,331 to reduce the carrying value of 12 medical office properties classified as held for sale to their estimated sales price, less estimated costs to sell, of $82,288 under agreements to sell that we have entered into with third parties. During the three months ended September 30, 2025, we also recorded impairment
15

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
charges of $35,912 to reduce the carrying value of 24 senior living communities classified as held for sale to their estimated sales price, less estimated costs to sell, of $47,634 under agreements or letters of intent to sell that we have entered into with third parties. See Note 3 for further information about impairment charges and the properties we have classified as held for sale.
In addition to the assets described in the table above, our financial instruments at September 30, 2025 and December 31, 2024 included cash and cash equivalents, restricted cash, certain other assets, our revolving credit facility, senior unsecured notes, senior secured notes, secured debt and finance leases and certain other unsecured obligations and liabilities. The fair values of these financial instruments approximated their carrying values in our condensed consolidated financial statements as of such dates, except as follows:

|  | As of September 30, 2025 |  | As of December 31, 2024
Description |  | Carrying Value (1) |  | Estimated Fair Value |  | Carrying Value (1) |  | Estimated Fair Value
Senior unsecured notes, 9.750% coupon rate, due 2025 |  | $ | — |  |  | $ | — |  |  | $ | 379,392 |  |  | $ | 379,970 |
Senior secured notes, zero coupon rate, due 2026 |  | 322,734 |  |  | 330,692 |  |  | 826,974 |  |  | 885,108 |
Senior unsecured notes, 4.750% coupon rate, due 2028 |  | 496,972 |  |  | 476,700 |  |  | 496,018 |  |  | 429,170 |
Senior secured notes, 7.250% coupon rate, due 2030 |  | 364,753 |  |  | 381,113 |  |  | — |  |  | — |
Senior unsecured notes, 4.375% coupon rate, due 2031 |  | 495,346 |  |  | 441,700 |  |  | 494,702 |  |  | 368,240 |
Senior unsecured notes, 5.625% coupon rate, due 2042 |  | 343,588 |  |  | 233,800 |  |  | 343,302 |  |  | 218,260 |
Senior unsecured notes, 6.250% coupon rate, due 2046 |  | 244,121 |  |  | 176,200 |  |  | 243,905 |  |  | 157,700 |
Secured debt and finance leases |  | 455,851 |  |  | 451,916 |  |  | 126,611 |  |  | 126,001 |
|  | $ | 2,723,365 |  |  | $ | 2,492,121 |  |  | $ | 2,910,904 |  |  | $ | 2,564,449 |

(1)Includes unamortized net discounts, premiums and debt issuance costs, if any.
We estimated the fair values of our two issuances of senior unsecured notes due 2042 and 2046 based on the closing price on The Nasdaq Stock Market LLC, or Nasdaq, as of September 30, 2025 and December 31, 2024 (Level 1 inputs as defined in the fair value hierarchy under GAAP). We estimated the fair values of our three issuances of senior unsecured notes due 2025, 2028 and 2031 and our two issuances of senior secured notes due 2026 and 2030 using an average of the bid and ask price on Nasdaq on or about September 30, 2025 and December 31, 2024 (Level 2 inputs as defined in the fair value hierarchy under GAAP). We estimated the fair values of our secured debts by using discounted cash flows analyses and currently prevailing market terms as of the measurement date (Level 3 inputs as defined in the fair value hierarchy under GAAP). Because Level 3 inputs are unobservable, our estimated fair values may differ materially from the actual fair values.
Note 7. Shareholders' Equity
Common Share Awards:
On March 20, 2025, in accordance with our Trustee compensation arrangements, we awarded 33,582 of our common shares in connection with the election of one of our Trustees, valued at $2.68 per share, the closing price of our common shares on Nasdaq on that day.
On May 29, 2025, in accordance with our Trustee compensation arrangements, we awarded to each of our seven Trustees 29,141 of our common shares, valued at $3.26 per share, the closing price of our common shares on Nasdaq on that day.
On September 9, 2025, we awarded to our officers and certain other employees of The RMR Group LLC, or RMR, under our equity compensation plan an aggregate of 950,895 of our common shares, valued at $4.28 per share, the closing price of our common shares on Nasdaq on that day.
Common Share Purchases:
During the three and nine months ended September 30, 2025, we purchased an aggregate of 218,290 and 259,233 of our common shares, respectively, valued at a weighted average share price of $4.37 and $4.10, respectively, from our officers and certain other current and former officers and employees of RMR and certain current and former employees of AlerisLife in satisfaction of tax withholding and payment obligations in connection with the vesting of prior awards of our common shares. We withheld and purchased these common shares at their fair market values based upon the trading prices of our common shares at the close of trading on Nasdaq on the applicable purchase dates.
16

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
Distributions:
During the nine months ended September 30, 2025, we declared and paid quarterly distributions to common shareholders as follows:

Declaration Date |  | Record Date |  | Payment Date |  | Distribution Per Share |  | Total Distributions
January 16, 2025 |  | January 27, 2025 |  | February 20, 2025 |  | $ | 0.01 |  |  | $ | 2,413 |
April 10, 2025 |  | April 22, 2025 |  | May 15, 2025 |  | 0.01 |  |  | 2,413 |
July 10, 2025 |  | July 21, 2025 |  | August 14, 2025 |  | 0.01 |  |  | 2,414 |
|  |  |  |  |  | $ | 0.03 |  |  | $ | 7,240 |

On October 9, 2025, we declared a quarterly distribution to common shareholders of record on October 27, 2025 of $0.01 per share, or approximately $2,421. We expect to pay this distribution on or about November 13, 2025 using cash on hand.
Note 8. Segment Reporting
Our operating segments are based on our internal reporting structure and property type and are aligned with how our Chief Operating Decision Maker, or the CODM, reviews the operating results to allocate resources and assess segment performance. The CODM is our President and Chief Executive Officer. Our two reportable segments are SHOP and Medical Office and Life Science Portfolio. Our SHOP segment consists of managed senior living communities that provide short term and long term residential living and, in some instances, care and other services for residents where we pay fees to managers to operate the communities on our behalf. Our Medical Office and Life Science Portfolio segment primarily consists of medical office properties leased to medical providers and other medical related businesses, as well as life science properties primarily leased to biotech laboratories and other similar tenants.
The significant expense categories and amounts presented below align with the segment-level information that is regularly provided to our CODM. The CODM reviews operating and financial results, including net income (loss) and its components, to assess performance, allocate resources and guide strategic decisions. For further information regarding the accounting policies of our reportable segments, see Note 2 to our consolidated financial statements included in Part IV, Item 15 of our Annual Report. The tables below present information about our segments.
17

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)

|  | For the Three Months Ended September 30, 2025
|  | SHOP |  | Medical Office and Life Science Portfolio |  | Total
Revenues: |  |  |  |  |  |
Rental income |  | $ | — |  |  | $ | 48,201 |  |  | $ | 48,201 |
Residents fees and services |  | 333,390 |  |  | — |  |  | 333,390 |
Total segment revenues |  | 333,390 |  |  | 48,201 |  |  | 381,591 |
Reconciliation of revenue: |  |  |  |  |  |
Other revenue (1) |  |  |  |  |  | 7,115 |
Total revenues |  |  |  |  |  | 388,706 |
Less: |  |  |  |  |  |
Senior living labor and benefits |  | 172,422 |  |  | — |  |  | 172,422 |
Dietary |  | 21,362 |  |  | — |  |  | 21,362 |
Utilities |  | 19,839 |  |  | 3,990 |  |  | 23,829 |
Real estate taxes |  | 10,944 |  |  | 5,723 |  |  | 16,667 |
Insurance |  | 9,385 |  |  | 739 |  |  | 10,124 |
Other operating expenses (2) |  | 69,818 |  |  | 11,074 |  |  | 80,892 |
Interest expense |  | 6,943 |  |  | 2,290 |  |  | 9,233 |
Depreciation and amortization |  | 47,113 |  |  | 15,840 |  |  | 62,953 |
Other segment items (3) |  | 36,130 |  |  | 55,538 |  |  | 91,668 |
Segment loss |  | (60,566) |  |  | (46,993) |  |  | (107,559) |
Reconciliation of segment loss: |  |  |  |  |  |
Other income (1) |  |  |  |  |  | 4,653 |
General and administrative |  |  |  |  |  | (12,789) |
Acquisition and certain other transaction related costs |  |  |  |  |  | (1,158) |
Gain on sale of properties |  |  |  |  |  | 1,554 |
Interest income and other expenses |  |  |  |  |  | (774) |
Interest expense |  |  |  |  |  | (39,653) |
Loss on modification or early extinguishment of debt |  |  |  |  |  | (11,191) |
Income tax expense |  |  |  |  |  | (337) |
Equity in net earnings of an investee |  |  |  |  |  | 3,214 |
Net loss |  |  |  |  |  | $ | (164,040) |

(1)Revenue and net income from our triple net leased wellness centers and senior living communities that are leased to third party operators, which we do not consider to be sufficiently material to constitute a separate reportable segment.
(2)Other operating expenses for each reportable segment include expenses such as management fees, repairs and maintenance, cleaning and other costs incurred in connection with the operation of our properties.
(3)Other segment items for each reportable segment include impairment of assets, gain (loss) on sale of properties, gain (loss) on modification or early extinguishment of debt, equity in net earnings (losses) of investees, interest income and other expenses and gain on insurance recoveries, as applicable.
18

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)

|  | For the Nine Months Ended September 30, 2025
|  | SHOP |  | Medical Office and Life Science Portfolio |  | Total
Revenues: |  |  |  |  |  |
Rental income |  | $ | — |  |  | $ | 146,020 |  |  | $ | 146,020 |
Residents fees and services |  | 989,241 |  |  | — |  |  | 989,241 |
Total segment revenues |  | 989,241 |  |  | 146,020 |  |  | 1,135,261 |
Reconciliation of revenue: |  |  |  |  |  |
Other revenue (1) |  |  |  |  |  | 23,021 |
Total revenues |  |  |  |  |  | 1,158,282 |
Less: |  |  |  |  |  |
Senior living labor and benefits |  | 500,086 |  |  | — |  |  | 500,086 |
Dietary |  | 62,893 |  |  | — |  |  | 62,893 |
Utilities |  | 56,777 |  |  | 10,380 |  |  | 67,157 |
Real estate taxes |  | 34,988 |  |  | 17,529 |  |  | 52,517 |
Insurance |  | 27,717 |  |  | 1,962 |  |  | 29,679 |
Other operating expenses (2) |  | 203,717 |  |  | 36,131 |  |  | 239,848 |
Interest expense |  | 11,870 |  |  | 6,814 |  |  | 18,684 |
Depreciation and amortization |  | 143,474 |  |  | 49,336 |  |  | 192,810 |
Other segment items (3) |  | 49,787 |  |  | 94,881 |  |  | 144,668 |
Segment loss |  | (102,068) |  |  | (71,013) |  |  | (173,081) |
Reconciliation of segment loss: |  |  |  |  |  |
Other income (1) |  |  |  |  |  | 15,803 |
General and administrative |  |  |  |  |  | (32,966) |
Acquisition and certain other transaction related costs |  |  |  |  |  | (1,257) |
Gain on sale of properties |  |  |  |  |  | 99,114 |
Interest income and other expenses |  |  |  |  |  | 4,307 |
Interest expense |  |  |  |  |  | (138,959) |
Loss on modification or early extinguishment of debt |  |  |  |  |  | (40,388) |
Income tax expense |  |  |  |  |  | (1,229) |
Equity in net earnings of an investee |  |  |  |  |  | 3,991 |
Net loss |  |  |  |  |  | $ | (264,665) |

(1)Revenue and net income from our triple net leased wellness centers and senior living communities that are leased to third party operators, which we do not consider to be sufficiently material to constitute a separate reportable segment.
(2)Other operating expenses for each reportable segment include expenses such as management fees, repairs and maintenance, cleaning and other costs incurred in connection with the operation of our properties.
(3)Other segment items for each reportable segment include impairment of assets, gain (loss) on sale of properties, gain (loss) on modification or early extinguishment of debt, equity in net earnings (losses) of investees, interest income and other expenses and gain on insurance recoveries, as applicable.
19

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)

|  | For the Three Months Ended September 30, 2024 |  |
|  | SHOP |  | Medical Office and Life Science Portfolio |  | Total |  |
Revenues: |  |  |  |  |  |  |  |
Rental income |  | $ | — |  |  | $ | 52,901 |  |  | $ | 52,901 |  |  |
Residents fees and services |  | 312,005 |  |  | — |  |  | 312,005 |  |  |
Total segment revenues |  | 312,005 |  |  | 52,901 |  |  | 364,906 |  |  |
Reconciliation of revenue: |  |  |  |  |  |  |  |
Other revenue (1) |  |  |  |  |  | 8,734 |  |  |
Total revenues |  |  |  |  |  | 373,640 |  |  |
Less: |  |  |  |  |  |  |  |
Senior living labor and benefits |  | 157,756 |  |  | — |  |  | 157,756 |  |  |
Dietary |  | 21,786 |  |  | — |  |  | 21,786 |  |  |
Utilities |  | 18,917 |  |  | 4,240 |  |  | 23,157 |  |  |
Real estate taxes |  | 8,851 |  |  | 6,767 |  |  | 15,618 |  |  |
Insurance |  | 10,899 |  |  | 1,040 |  |  | 11,939 |  |  |
Other operating expenses (2) |  | 66,363 |  |  | 13,027 |  |  | 79,390 |  |  |
Interest expense |  | 54 |  |  | 2,319 |  |  | 2,373 |  |  |
Depreciation and amortization |  | 47,343 |  |  | 18,773 |  |  | 66,116 |  |  |
Other segment items (3) |  | — |  |  | 21,213 |  |  | 21,213 |  |  |
Segment loss |  | (19,964) |  |  | (14,478) |  |  | (34,442) |  |  |
Reconciliation of segment loss: |  |  |  |  |  |  |  |
Other income (1) |  |  |  |  |  | 5,840 |  |  |
General and administrative |  |  |  |  |  | (13,933) |  |  |
Acquisition and certain other transaction related costs |  |  |  |  |  | (331) |  |  |
Interest income and other expenses |  |  |  |  |  | 2,575 |  |  |
Interest expense |  |  |  |  |  | (57,070) |  |  |
Income tax expense |  |  |  |  |  | (148) |  |  |
Equity in net earnings (losses) of an investee |  |  |  |  |  | (1,180) |  |  |
Net loss |  |  |  |  |  | $ | (98,689) |  |  |

(1)Revenue and net income from our triple net leased wellness centers and senior living communities that are leased to third party operators, which we do not consider to be sufficiently material to constitute a separate reportable segment.
(2)Other operating expenses for each reportable segment include expenses such as management fees, repairs and maintenance, cleaning and other costs incurred in connection with the operation of our properties.
(3)Other segment items for each reportable segment include impairment of assets, gain (loss) on sale of properties, gain (loss) on modification or early extinguishment of debt, equity in net earnings (losses) of investees, interest income and other expenses and gain on insurance recoveries, as applicable.
20

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)

|  | For the Nine Months Ended September 30, 2024 |  |
|  | SHOP |  | Medical Office and Life Science Portfolio |  | Total |  |
Revenues: |  |  |  |  |  |  |  |
Rental income |  | $ | — |  |  | $ | 161,605 |  |  | $ | 161,605 |  |  |
Residents fees and services |  | 928,653 |  |  | — |  |  | 928,653 |  |  |
Total segment revenues |  | 928,653 |  |  | 161,605 |  |  | 1,090,258 |  |  |
Reconciliation of revenue: |  |  |  |  |  |  |  |
Other revenue (1) |  |  |  |  |  | 25,550 |  |  |
Total revenues |  |  |  |  |  | 1,115,808 |  |  |
Less: |  |  |  |  |  |  |  |
Senior living labor and benefits |  | 470,363 |  |  | — |  |  | 470,363 |  |  |
Dietary |  | 63,282 |  |  | — |  |  | 63,282 |  |  |
Utilities |  | 53,726 |  |  | 10,639 |  |  | 64,365 |  |  |
Real estate taxes |  | 31,983 |  |  | 21,006 |  |  | 52,989 |  |  |
Insurance |  | 33,446 |  |  | 2,820 |  |  | 36,266 |  |  |
Other operating expenses (2) |  | 194,726 |  |  | 38,788 |  |  | 233,514 |  |  |
Interest expense |  | 183 |  |  | 3,435 |  |  | 3,618 |  |  |
Depreciation and amortization |  | 141,176 |  |  | 58,488 |  |  | 199,664 |  |  |
Other segment items (3) |  | — |  |  | 78,867 |  |  | 78,867 |  |  |
Segment loss |  | (60,232) |  |  | (52,438) |  |  | (112,670) |  |  |
Reconciliation of segment loss: |  |  |  |  |  |  |  |
Other income (1) |  |  |  |  |  | 17,178 |  |  |
General and administrative |  |  |  |  |  | (27,763) |  |  |
Acquisition and certain other transaction related costs |  |  |  |  |  | (2,243) |  |  |
Interest income and other expenses |  |  |  |  |  | 7,215 |  |  |
Interest expense |  |  |  |  |  | (172,103) |  |  |
Loss on modification or early extinguishment of debt |  |  |  |  |  | (209) |  |  |
Income tax expense |  |  |  |  |  | (505) |  |  |
Equity in net earnings of an investee |  |  |  |  |  | 8,291 |  |  |
Net loss |  |  |  |  |  | $ | (282,809) |  |  |

(1)Revenue and net income from our triple net leased wellness centers and senior living communities that are leased to third party operators, which we do not consider to be sufficiently material to constitute a separate reportable segment.
(2)Other operating expenses for each reportable segment include expenses such as management fees, repairs and maintenance, cleaning and other costs incurred in connection with the operation of our properties.
(3)Other segment items for each reportable segment include impairment of assets, gain (loss) on sale of properties, gain (loss) on modification or early extinguishment of debt, equity in net earnings (losses) of investees, interest income and other expenses and gain on insurance recoveries, as applicable.

| As of September 30, 2025 |  | As of December 31, 2024
Assets (1) |  |  |
SHOP | $ | 2,954,224 |  |  | $ | 3,084,101 |
Medical Office and Life Science Portfolio | 1,340,558 |  |  | 1,688,034 |
All Other | 389,192 |  |  | 364,870 |
Total assets | $ | 4,683,974 |  |  | $ | 5,137,005 |

(1)See Note 3 for further information regarding additions to long-lived assets.
21

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
Note 9. Senior Living Community Management Agreements
Our managed senior living communities are operated by third parties pursuant to management agreements. Five Star Senior Living, or Five Star, which is an operating division of AlerisLife, manages many of our SHOP communities. Five Star manages these communities for us pursuant to a master management agreement. AlerisLife guarantees the payment and performance of each of its applicable subsidiary's obligations under the applicable management agreements. We lease our managed senior living communities to our taxable REIT subsidiaries, or TRSs. On September 3, 2025, we announced that we entered into agreements with AlerisLife and seven different third party managers to transition the management of 116 of our senior living communities managed by Five Star to these managers in connection with the sale by AlerisLife of all of its assets and the wind-down of its business. As of September 30, 2025, management agreements for 21 of our senior living communities had been transitioned from Five Star to new and existing managers. As of November 3, 2025, management agreements for 85 communities had been transitioned to new managers and we expect to complete the management transitions for the remaining senior living communities by December 31, 2025. We may experience temporary disruption, including reductions in our cash flows, as we transition these communities from Five Star.
Our Senior Living Communities Managed by Five Star. Five Star managed 97 and 119 of our senior living communities as of September 30, 2025 and 2024, respectively.
We incurred management fees payable to Five Star of $10,877 and $10,611 for the three months ended September 30, 2025 and 2024, respectively, and $33,251 and $31,462 for the nine months ended September 30, 2025 and 2024, respectively. For the three months ended September 30, 2025 and 2024, $10,446 and $10,060, respectively, of the total management fees were expensed to property operating expenses in our condensed consolidated statements of comprehensive income (loss) and $431 and $551, respectively, were capitalized in our condensed consolidated balance sheets. For the nine months ended September 30, 2025 and 2024, $31,721 and $30,053, respectively, of the total management fees were expensed to property operating expenses in our condensed consolidated statements of comprehensive income (loss) and $1,530 and $1,409, respectively, were capitalized in our condensed consolidated balance sheets. The amounts capitalized are being depreciated over the estimated useful lives of the related capital assets.
Our Senior Living Communities Managed by Other Third Party Managers. Several other third party managers managed 132 and 111 of our senior living communities as of September 30, 2025 and 2024, respectively.
We incurred management fees payable to these third party managers of $6,812 and $5,858 for the three months ended September 30, 2025 and 2024, respectively, and $19,116 and $17,341 for the nine months ended September 30, 2025 and 2024, respectively. Additionally, we incurred incentive management fees payable to certain of these third party managers of $351 for the nine months ended September 30, 2025. These amounts are included in property operating expenses in our condensed consolidated statements of comprehensive income (loss).
The following table presents residents fees and services revenue from all of our managed senior living communities disaggregated by the type of contract and payer:

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
Revenue from contracts with customers: |  | 2025 |  | 2024 |  | 2025 |  | 2024
Basic housing and support services |  | $ | 259,126 |  |  | $ | 242,787 |  |  | $ | 768,012 |  |  | $ | 727,558 |
Medicare and Medicaid programs |  | 26,726 |  |  | 25,619 |  |  | 80,233 |  |  | 73,951 |
Private pay and other third party payer SNF services |  | 47,538 |  |  | 43,599 |  |  | 140,996 |  |  | 127,144 |
Total residents fees and services |  | $ | 333,390 |  |  | $ | 312,005 |  |  | $ | 989,241 |  |  | $ | 928,653 |

Note 10. Business and Property Management Agreements with RMR
We have no employees. The personnel and various services we require to operate our business are provided to us by RMR. We have two agreements with RMR to provide management services to us: (1) a business management agreement, which relates to our business generally; and (2) a property management agreement, which relates to the property level operations of many of our properties, including our medical office and life science properties, and major renovation or repositioning activities at our senior living communities that we may request RMR to manage from time to time. See Note 11 for further information regarding our relationship, agreements and transactions with RMR.
22

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
Business Management Agreements with RMR. Pursuant to our business management agreement and in accordance with GAAP, we accrued estimated incentive management fees during the three and nine months ended September 30, 2025 and 2024. The actual amount of incentive management fees incurred for 2025, if any, will be based on our common share total return, as defined in our business management agreement, for the three-year period ending December 31, 2025, and will be payable to RMR in January 2026. We did not incur any incentive management fees for the year ended December 31, 2024.
Expense Reimbursement. We are generally responsible for all our operating expenses, including certain expenses incurred or arranged by RMR on our behalf. We are generally not responsible for payment of RMR's employment, office or administrative expenses incurred to provide management services to us, except for the employment and related expenses of RMR's employees assigned to work exclusively or partly at our properties, our share of the wages, benefits and other related costs of RMR's centralized accounting personnel, our share of RMR's costs for providing our internal audit function or as otherwise agreed. Our property level operating expenses are generally incorporated into the rents charged to our tenants, including certain payroll and related costs incurred by RMR.
For the three and nine months ended September 30, 2025 and 2024, the business management fees, incentive management fees, property management fees and construction supervision fees and expense reimbursements recognized in our condensed consolidated financial statements were as follows:

|  |  |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | Financial Statement Line Item |  | 2025 |  | 2024 |  | 2025 |  | 2024
Pursuant to business management agreement: |  |  |  |  |  |  |  |  |  |
Business management fees |  | General and administrative expenses (1) |  | $ | 3,967 |  |  | $ | 3,977 |  |  | $ | 11,517 |  |  | $ | 12,321 |
Incentive management fees |  | General and administrative expenses |  | 5,676 |  |  | 6,934 |  |  | 12,231 |  |  | 6,934 |
Total |  |  |  | $ | 9,643 |  |  | $ | 10,911 |  |  | $ | 23,748 |  |  | $ | 19,255 |
Pursuant to property management agreement (2): |  |  |  |  |  |  |  |  |  |
Property management fees |  | Property operating expenses |  | $ | 1,199 |  |  | $ | 1,358 |  |  | $ | 3,643 |  |  | $ | 4,342 |
Construction supervision fees |  | Building and improvements (3) |  | 341 |  |  | 429 |  |  | 775 |  |  | 1,069 |
Total |  |  |  | $ | 1,540 |  |  | $ | 1,787 |  |  | $ | 4,418 |  |  | $ | 5,411 |
Expense Reimbursement: |  |  |  |  |  |  |  |  |  |
Property level expenses |  | Property operating expenses |  | $ | 3,085 |  |  | $ | 3,925 |  |  | $ | 10,144 |  |  | $ | 11,202 |
Other reimbursed expenses |  | General and administrative expenses |  | 50 |  |  | 82 |  |  | 150 |  |  | 246 |
Total |  |  |  | $ | 3,135 |  |  | $ | 4,007 |  |  | $ | 10,294 |  |  | $ | 11,448 |

(1)The net business management fees we recognized reflect a reduction of $743 for each of the three months ended September 30, 2025 and 2024 and $2,229 for each of the nine months ended September 30, 2025 and 2024, for the amortization of the liability we recorded in connection with our former investment in The RMR Group Inc., or RMR Inc.
(2)The net property management and construction supervision fees we recognized reflect a reduction of $199 for each of the three months ended September 30, 2025 and 2024 and $597 for each of the nine months ended September 30, 2025 and 2024, for the amortization of the liability we recorded in connection with our former investment in RMR Inc.
(3)Amounts capitalized as building improvements are depreciated over the estimated useful lives of the related capital assets.
In January 2025, in connection with a $100,000 credit agreement and related security agreement entered into by RMR and certain of its subsidiaries with Citibank, N.A., or Citibank, and the other lenders party thereto, we consented to the pledge and assignment of RMR’s interest in our management agreements under the security agreement. Pursuant to the consent, we agreed, among other things, that upon notice that an event of default under the RMR credit agreement has occurred and is continuing, we will continue to make all payments under our management agreements in accordance with the instructions of Citibank, and that if there is an event of default by RMR under our management agreements that would allow us to terminate or suspend our obligations, we will not terminate or suspend without notice to Citibank and provide Citibank 30 days to cure the default on RMR’s behalf. The consent was approved by our Independent Trustees.
23

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
Management Agreements between our Joint Ventures and RMR. We have two separate joint venture arrangements with third party institutional investors, the Seaport JV and the LSMD JV. RMR provides management services to both of these joint ventures. Our joint ventures are not our consolidated subsidiaries and, as a result, we are not obligated to pay management fees to RMR under our management agreements with RMR for the services it provides regarding the joint ventures.
Note 11. Related Person Transactions
We have relationships and historical and continuing transactions with RMR, RMR Inc., AlerisLife (including Five Star) and others related to them, including other companies to which RMR or its subsidiaries provide management services and some of which have trustees, directors or officers who are also our Trustees or officers. RMR is a majority owned subsidiary of RMR Inc. The Chair of our Board of Trustees and one of our Managing Trustees, Adam Portnoy, is the sole trustee, an officer and the controlling shareholder of ABP Trust, which is the controlling shareholder of RMR Inc., the chair of the board of directors, a managing director and the president and chief executive officer of RMR Inc., an officer and employee of RMR and the sole director of AlerisLife. Christopher Bilotto, our other Managing Trustee and President and Chief Executive Officer, and Matthew Brown, our Chief Financial Officer and Treasurer, are also officers and employees of RMR. Jennifer Clark, our Secretary and former Managing Trustee, also serves as a managing director and the executive vice president, general counsel and secretary of RMR Inc., an officer and employee of RMR, an officer of ABP Trust and secretary of AlerisLife. Jeffrey Leer, the president and chief executive officer of AlerisLife, is an executive officer of RMR. Some of our Independent Trustees also serve as independent trustees of other public companies to which RMR or its subsidiaries provide management services. Mr. Portnoy serves as the chair of the board and as a managing trustee of these companies. Other officers of RMR, including Ms. Clark and certain of our officers, serve as managing trustees or officers of certain of these companies. In addition, officers of RMR and RMR Inc. serve as our officers and officers of other companies to which RMR or its subsidiaries provide management services. As of September 30, 2025, ABP Trust and Mr. Portnoy owned 9.8% of our outstanding common shares.
AlerisLife. On February 16, 2024, we exercised our purchase right in connection with ABP Trust's acquisition of AlerisLife in March 2023 and acquired, together with our applicable TRS, approximately 34.0% of the then outstanding AlerisLife common shares from ABP Trust, for a total purchase price of $15,459, including transaction related costs, and we, our applicable TRS, ABP Trust and AlerisLife entered into a stockholders agreement. Following this acquisition, ABP Trust owns the remaining approximate 66.0% of AlerisLife.
On February 14, 2025, AlerisLife paid an aggregate cash dividend of $50,000 to its stockholders. Our pro rata share of this cash dividend was $17,000.
On July 15, 2025, AlerisLife paid an aggregate cash dividend of $10,000 to its stockholders. Our pro rata share of this cash dividend was $3,400.
See Note 9 for further information regarding our relationships, agreements and transactions with AlerisLife (including Five Star).
Our Joint Ventures. In connection with our entering into the LSMD JV in January 2022, we paid mortgage escrow amounts and closing costs that were payable by that joint venture. The remaining costs totaled $4,050 as of September 30, 2025 and are included in other assets, net, in our condensed consolidated balance sheet. RMR provides management services to each of the Seaport JV and the LSMD JV. See Note 10 for further information regarding those management agreements with RMR.
Our Manager, RMR. We have two agreements with RMR to provide management services to us. See Note 10 for further information regarding our management agreements with RMR.
Leases with RMR. We lease office space to RMR in certain of our properties for RMR’s property management offices. We recognized rental income from RMR for this leased office space of $102 and $97 for the three months ended September 30, 2025 and 2024, respectively, and $311 and $354 for the nine months ended September 30, 2025 and 2024, respectively.
For further information about these and other such relationships and certain other related person transactions, see our Annual Report.
24

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
Note 12. Derivatives and Hedging Activities
We are exposed to certain risks relating to our ongoing business operations, including the impact of changes in interest rates. The only risk currently managed by us using derivative instruments is our interest rate risk. As required under the applicable loan agreement, we have an interest rate cap agreement to manage our interest rate risk exposure on our $140,000 floating rate mortgage loan secured by 14 SHOP communities with interest payable at a rate equal to SOFR plus a premium of 2.50%. The use of derivative financial instruments carries certain risks, including the risk that the counterparties to these contractual arrangements are not able to perform under the agreements. To mitigate this risk, we only enter into derivative financial instruments with counterparties with high credit ratings and with major financial institutions with which we or our related parties may also have other financial relationships. We do not anticipate that any of the counterparties will fail to meet their obligations.
Our interest rate cap agreement is designated as a cash flow hedge of interest rate risk and is measured on a recurring basis at fair value. See Notes 5 and 6 for further information regarding the debt our interest rate cap is related to and the fair value of our interest rate cap. The following table summarizes the terms of our outstanding interest rate cap agreement as of September 30, 2025:

Balance Sheet Line Item |  | Underlying Instrument |  | Maturity Date |  | Strike Rate |  | Notional Amount |  | Fair Value
Other assets, net |  | Floating rate mortgage loan |  | 3/31/2028 |  | 4.50% |  | $ | 140,000 |  |  | $ | 1 |

Interest rate caps designated as cash flow hedges involve the receipt of variable amounts from a counterparty if interest rates rise above the strike rate on the contract in exchange for an up-front premium. For derivatives designated and qualifying as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in cumulative other comprehensive income (loss) and subsequently reclassified into interest expense in the same period during which the hedged transaction affects earnings. Gains and losses on the derivative representing hedge components excluded from the assessment of effectiveness are recognized over the life of the hedge on a systematic and rational basis, as documented at hedge inception in accordance with our accounting policy election. The earnings recognition of excluded components is presented in interest expense. Amounts reported in cumulative other comprehensive income (loss) related to derivatives will be reclassified to interest expense as interest payments are made, if any, on our applicable debt.
The following table summarizes the activity related to our cash flow hedges within cumulative other comprehensive income (loss) for the periods shown:

|  | Three Months Ended September 30, 2025 |  | Nine Months Ended September 30, 2025
Amount of loss recognized on derivative in other comprehensive income (loss) |  | $ | (17) |  |  | $ | (46) |
Amount of loss reclassified from cumulative other comprehensive income (loss) into interest expense |  | $ | (11) |  |  | $ | (23) |
Total amount of interest expense presented in the condensed consolidated statements of comprehensive income (loss) |  | $ | (48,886) |  |  | $ | (157,643) |

Note 13. Income Taxes
We have elected to be taxed as a real estate investment trust, or REIT, under the Internal Revenue Code of 1986, as amended, and, as such, are generally not subject to federal and most state income taxation on our operating income provided we distribute our taxable income to our shareholders and meet certain organization and operating requirements. We do, however, lease our managed senior living communities to our wholly owned TRSs that, unlike most of our subsidiaries, file a separate consolidated federal corporate income tax return and are subject to federal and state income taxes. Our consolidated income tax provision includes the income tax provision related to the operations of our TRSs and certain state income taxes we incur despite our taxation as a REIT. Our current income tax expense (or benefit) fluctuates from period to period based primarily on the timing of our income, including gains on the disposition of properties or losses in a particular quarter. For the three months ended September 30, 2025 and 2024, we recognized income tax expense of $337 and $148, respectively, and for the nine months ended September 30, 2025 and 2024, we recognized income tax expense of $1,229 and $505, respectively.
25

Table of Contents
DIVERSIFIED HEALTHCARE TRUST
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(dollar amounts in thousands, except per share data or as otherwise stated)
Note 14. Weighted Average Common Share s
We calculate basic earnings per common share using the two class method. We calculate diluted earnings per share using the more dilutive of the two class method or the treasury stock method. Unvested share awards and other potentially dilutive common shares, together with the related impact on earnings, are considered when calculating diluted earnings per share.
26

Table of Contents
Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations.
The following discussion should be read in conjunction with our condensed consolidated financial statements and notes thereto included in this Quarterly Report on Form 10-Q and with our Annual Report.
OVERVIEW
We are a REIT organized under Maryland law that primarily owns medical office and life science properties, senior living communities and other healthcare related properties throughout the United States. As of September 30, 2025, we owned 335 properties located in 34 states and Washington, D.C., including 50 properties classified as held for sale.
As of September 30, 2025, we owned an equity interest in each of the Seaport JV and the LSMD JV that own medical office and life science properties located in five states with an aggregate of approximately 2.2 million rentable square feet that were 99% leased with an average (by annualized rental income) remaining lease term of 14.4 years.
On September 3, 2025, we announced that we entered into agreements with AlerisLife and seven different third party managers to transition the management of 116 of our senior living communities managed by Five Star to these managers. As of September 30, 2025, management agreements for 21 of our senior living communities had been transitioned from Five Star to new and existing managers. As of November 3, 2025, management agreements for 85 communities had been transitioned to new managers and we expect to complete the management transitions for the remaining senior living communities by December 31, 2025. We may experience temporary disruption, including reductions in our cash flows, as we transition these communities from Five Star.
We are encouraged by positive trends, including increases in rates, margins and occupancy, in our SHOP segment. Additionally, we expect that favorable supply and demand dynamics in the senior living industry will enable our managers to continue to grow occupancy and drive positive performance. While certain costs, primarily labor, insurance and food costs, have increased, we expect these cost increases to moderate, which will provide our managers the opportunity to increase rates in excess of increases in costs, resulting in improving returns to us.
In an effort to optimize performance, our asset management team reviews the results of each of our senior living communities and our operators, taking into account various factors such as performance metric benchmarks, location and other relevant data points. This comprehensive review process ensures that our decisions are data-driven and strategically aligned with our overall objectives. As a result of these reviews, our strategy to drive positive performance includes analyzing non-performing communities for potential disposition or transition to different operators.
We are closely monitoring the impacts of the current economic and market conditions on all aspects of our business, including, but not limited to, uncertainties surrounding interest rates and inflation, volatility in the public debt and equity markets, global geopolitical hostilities and tensions, any U.S. government shutdown, economic uncertainties and tariffs, labor market conditions and changes in real estate utilization. We expect to experience continued variability in labor, insurance and food costs in our SHOP segment. Inflationary pressures in the United States, as well as global geopolitical instability and tensions, have given rise to uncertainty regarding potential disruptions in the financial markets. Continued or intensified disruptions in the financial markets could adversely affect our financial condition and that of our managers, operators and tenants, could adversely impact the ability or willingness of our managers, operators, tenants or residents to pay amounts owed to us, could impair our ability to effectively deploy our capital or realize our target returns on our investments, may restrict our access to, and would likely increase, our cost of capital, and may cause the values of our properties and of our securities to decline.
For further information and risks relating to these economic uncertainties and their impact on our business and financial condition, see Part I, Item 1, "Business" and Part I, Item 1A, "Risk Factors" in our Annual Report.
27

Table of Contents
PORTFOLIO OVERVIEW
The following tables present an overview of our portfolio as of September 30, 2025 (dollars in thousands, except investment per square foot or unit data):

As of September 30, 2025 |  | Number of Properties |  | Square Feet or Number of Units |  |  |  | Gross Book Value of Real Estate Assets (1) |  | % of Total Gross Book Value of Real Estate Assets |  | Investment per Square Foot or Unit (2) |  | Q3 2025 Revenues |  | % of Q3 2025 Revenues |  | Q3 2025 NOI (3) |  | % of Q3 2025 NOI
SHOP |  | 229 |  |  | 24,906 |  |  | units |  | $ | 4,600,223 |  |  | 69.1 | % |  | $ | 184,703 |  |  | $ | 333,390 |  |  | 85.8 | % |  | $ | 29,620 |  |  | 46.8 | %
Medical Office and Life Science Portfolio |  | 88 |  |  | 6,931,407 |  |  | sq. ft. |  | 1,718,154 |  |  | 25.8 | % |  | $ | 248 |  |  | 48,201 |  |  | 12.4 | % |  | 26,675 |  |  | 42.1 | %
Triple net leased senior living communities |  | 8 |  |  | 1,180 |  |  | units |  | 133,324 |  |  | 2.0 | % |  | $ | 112,986 |  |  | 3,217 |  |  | 0.8 | % |  | 3,216 |  |  | 5.1 | %
Wellness centers |  | 10 |  |  | 812,246 |  |  | sq. ft. |  | 208,110 |  |  | 3.1 | % |  | $ | 256 |  |  | 3,898 |  |  | 1.0 | % |  | 3,808 |  |  | 6.0 | %
Total |  | 335 |  |  |  |  |  |  | $ | 6,659,811 |  |  | 100.0 | % |  |  |  | $ | 388,706 |  |  | 100.0 | % |  | $ | 63,319 |  |  | 100.0 | %

|  | Occupancy
|  | As of and For the Three Months Ended September 30,
|  | 2025 |  | 2024
SHOP |  | 81.5 | % |  | 79.4 | %
Medical Office and Life Science Portfolio (4) |  | 86.6 | % |  | 80.8 | %
Triple net leased senior living communities |  | 100.0 | % |  | 100.0 | %
Wellness centers |  | 100.0 | % |  | 100.0 | %

(1)Represents gross book value of real estate assets at cost plus certain acquisition costs, before depreciation and purchase price allocations and less impairment write downs, if any.
(2)Represents gross book value of real estate assets divided by number of rentable square feet or living units, as applicable.
(3)We calculate our net operating income, or NOI, on a consolidated basis and by reportable segment. Our definition of NOI and our reconciliation of net income (loss) to NOI are included below under the heading “Non-GAAP Financial Measures.”
(4)Medical office and life science property occupancy data includes (i) out of service assets undergoing redevelopment, (ii) space which is leased but is not occupied or is being offered for sublease by tenants and (iii) space being fitted out for occupancy.
During the three and nine months ended September 30, 2025, we entered into new and renewal leases in our Medical Office and Life Science Portfolio segment as summarized in the following tables (dollars and square feet in thousands, except per square foot amounts):

|  | Three Months Ended September 30, 2025
|  | New Leases |  | Renewals |  | Total
Square feet leased during the quarter |  | 10 |  |  | 76 |  |  | 86 |
Weighted average rental rate change (by rentable square feet) |  | 29.8 | % |  | 6.9 | % |  | 9.1 | %
Weighted average lease term (years) |  | 7.5 |  |  | 6.6 |  |  | 6.7 |
Total leasing costs and concession commitments (1) |  | $ | 601 |  |  | $ | 1,793 |  |  | $ | 2,394 |
Total leasing costs and concession commitments per square foot (1) |  | $ | 62.74 |  |  | $ | 23.46 |  |  | $ | 27.84 |
Total leasing costs and concession commitments per square foot per year (1) |  | $ | 8.42 |  |  | $ | 3.54 |  |  | $ | 4.14 |

|  | Nine Months Ended September 30, 2025 |  |
|  | New Leases |  | Renewals |  | Total |  |
Square feet leased during the quarter |  | 134 |  |  | 203 |  |  | 337 |  |  |
Weighted average rental rate change (by rentable square feet) |  | 21.8 | % |  | 8.9 | % |  | 13.6 | % |  |
Weighted average lease term (years) |  | 11.1 |  |  | 6.5 |  |  | 8.3 |  |  |
Total leasing costs and concession commitments (1) |  | $ | 10,598 |  |  | $ | 4,298 |  |  | $ | 14,896 |  |  |
Total leasing costs and concession commitments per square foot (1) |  | $ | 79.27 |  |  | $ | 21.14 |  |  | $ | 44.20 |  |  |
Total leasing costs and concession commitments per square foot per year (1) |  | $ | 7.13 |  |  | $ | 3.28 |  |  | $ | 5.35 |  |  |

(1)Includes commitments made for leasing expenditures and concessions, such as tenant improvements, leasing commissions, tenant reimbursements and free rent.
28

Table of Contents
Lease Expiration Schedules
As of September 30, 2025, lease expirations in our Medical Office and Life Science Portfolio segment were as follows (dollars in thousands):

Year |  | Number of Tenants |  | Square Feet Leased |  | % of Total Leased Square Feet |  | Cumulative % of Total Leased Square Feet |  | Annualized Rental Income (1) |  |  |  |  |  |  |  | % of Total Annualized Rental Income |  | Cumulative % of Total Annualized Rental Income
2025 |  | 27 |  | 71,907 |  |  | 1.2 | % |  | 1.2 | % |  | $ | 2,936 |  |  |  |  |  |  |  |  | 1.5 | % |  | 1.5 | %
2026 |  | 50 |  | 645,464 |  |  | 10.7 | % |  | 11.9 | % |  | 20,763 |  |  |  |  |  |  |  |  | 10.9 | % |  | 12.4 | %
2027 |  | 66 |  | 749,776 |  |  | 12.5 | % |  | 24.4 | % |  | 19,183 |  |  |  |  |  |  |  |  | 10.0 | % |  | 22.4 | %
2028 |  | 61 |  | 1,148,176 |  |  | 19.1 | % |  | 43.5 | % |  | 35,318 |  |  |  |  |  |  |  |  | 18.5 | % |  | 40.9 | %
2029 |  | 64 |  | 607,939 |  |  | 10.1 | % |  | 53.6 | % |  | 18,604 |  |  |  |  |  |  |  |  | 9.7 | % |  | 50.6 | %
2030 |  | 52 |  | 451,387 |  |  | 7.5 | % |  | 61.1 | % |  | 12,282 |  |  |  |  |  |  |  |  | 6.4 | % |  | 57.0 | %
2031 |  | 23 |  | 838,149 |  |  | 14.0 | % |  | 75.1 | % |  | 23,709 |  |  |  |  |  |  |  |  | 12.4 | % |  | 69.4 | %
2032 |  | 20 |  | 379,834 |  |  | 6.3 | % |  | 81.4 | % |  | 14,246 |  |  |  |  |  |  |  |  | 7.5 | % |  | 76.9 | %
2033 |  | 15 |  | 360,350 |  |  | 6.0 | % |  | 87.4 | % |  | 15,209 |  |  |  |  |  |  |  |  | 8.0 | % |  | 84.9 | %
2034 and thereafter |  | 43 |  | 752,349 |  |  | 12.6 | % |  | 100.0 | % |  | 28,889 |  |  |  |  |  |  |  |  | 15.1 | % |  | 100.0 | %
Total |  | 421 |  | 6,005,331 |  |  | 100.0 | % |  |  |  | $ | 191,139 |  |  |  |  |  |  |  |  | 100.0 | % |  |
Weighted average remaining lease term (in years) |  | 4.7 |  |  |  |  |  |  | 5.0 |  |  |  |  |  |  |  |  |  |  |

(1)Annualized rental income is based on rents pursuant to existing leases as of September 30, 2025, including straight line rent adjustments and estimated recurring expense reimbursements for certain net and modified gross leases and excluding lease value amortization at certain of our medical office and life science properties.
As of September 30, 2025, lease expirations at our triple net leased wellness centers and senior living communities leased to third party operators were as follows (dollars in thousands):

Year |  | Number of Properties |  | Number of Units or Square Feet |  | Annualized Rental Income (1) |  | Percent of Total |  | Cumulative Percent of Total
2025 |  | — |  |  | — |  |  | $ | — |  |  | — | % |  | — | %
2026 |  | — |  |  | — |  |  | — |  |  | — | % |  | — | %
2027 |  | 4 |  |  | 533 units |  | 4,229 |  |  | 15.1 | % |  | 15.1 | %
2028 |  | — |  |  | — |  |  | — |  |  | — | % |  | 15.1 | %
2029 |  | 1 |  |  | 155 units |  | 547 |  |  | 1.9 | % |  | 17.0 | %
2030 |  | 5 |  |  | 277 units and 129,600 sq. ft. |  | 5,046 |  |  | 18.0 | % |  | 35.0 | %
2031 |  | — |  |  | — |  |  | — |  |  | — | % |  | 35.0 | %
2032 |  | — |  |  | — |  |  | — |  |  | — | % |  | 35.0 | %
2033 |  | 1 |  |  | 215 units |  | 4,341 |  |  | 15.5 | % |  | 50.5 | %
2034 and thereafter |  | 7 |  |  | 682,646 sq. ft. |  | 13,917 |  |  | 49.5 | % |  | 100.0 | %
Total |  | 18 |  |  |  |  | $ | 28,080 |  |  | 100.0 | % |  |
Weighted average remaining lease term (in years) |  |  | 10.1 |  |  |  |  |

(1)Annualized rental income is based on rents pursuant to existing leases as of September 30, 2025. Annualized rental income includes estimated percentage rents and straight line rent adjustments and excludes lease value amortization.
29

RESULTS OF OPERATIONS (dollars and square feet in thousands, unless otherwise noted)
We operate in, and report financial information for, the following two segments: SHOP and Medical Office and Life Science Portfolio. Our SHOP segment consists of managed senior living communities that provide short term and long term residential living and, in some instances, care and other services for residents where we pay fees to managers to operate the communities on our behalf. Our Medical Office and Life Science Portfolio segment primarily consists of medical office properties leased to medical providers and other medical related businesses, as well as life science properties primarily leased to biotech laboratories and other similar tenants.
We also report “All Other” operations, which consists of triple net leased wellness centers and senior living communities that are leased to third party operators from which we receive rents, which we do not consider to be sufficiently material to constitute a separate reportable segment, and any other income or expenses that are not attributable to a specific reportable segment.
The following table summarizes the results of operations of each of our segments for the three and nine months ended September 30, 2025 and 2024:

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Revenues: |  |  |  |  |  |  |  |
SHOP |  | $ | 333,390 |  |  | $ | 312,005 |  |  | $ | 989,241 |  |  | $ | 928,653 |
Medical Office and Life Science Portfolio |  | 48,201 |  |  | 52,901 |  |  | 146,020 |  |  | 161,605 |
All Other |  | 7,115 |  |  | 8,734 |  |  | 23,021 |  |  | 25,550 |
Total revenues |  | $ | 388,706 |  |  | $ | 373,640 |  |  | $ | 1,158,282 |  |  | $ | 1,115,808 |
Net loss: |  |  |  |  |  |  |  |
SHOP |  | $ | (60,566) |  |  | $ | (19,964) |  |  | $ | (102,068) |  |  | $ | (60,232) |
Medical Office and Life Science Portfolio |  | (46,993) |  |  | (14,478) |  |  | (71,013) |  |  | (52,438) |
All Other |  | (56,481) |  |  | (64,247) |  |  | (91,584) |  |  | (170,139) |
Net loss |  | $ | (164,040) |  |  | $ | (98,689) |  |  | $ | (264,665) |  |  | $ | (282,809) |

The following section analyzes and discusses the results of operations of each of our segments for the periods presented.
30

Three Months Ended September 30, 2025 Compared to Three Months Ended September 30, 2024 (dollars and square feet in thousands, except average monthly rate):
Unless otherwise indicated, references in this section to changes or comparisons of results, income or expenses refer to comparisons of the results for the three months ended September 30, 2025 to the three months ended September 30, 2024. Our definition of NOI and our reconciliation of net income (loss) to NOI and a description of why we believe NOI is an appropriate supplemental measure are included below under the heading “Non-GAAP Financial Measures.”

|  | Three Months Ended September 30,
|  | 2025 |  | 2024 |  | $ Change |  | % Change
NOI by segment: |  |  |  |  |  |  |  |
SHOP |  | $ | 29,620 |  |  | $ | 27,433 |  |  | $ | 2,187 |  |  | 8.0 | %
Medical Office and Life Science Portfolio |  | 26,675 |  |  | 27,827 |  |  | (1,152) |  |  | (4.1) | %
All Other |  | 7,024 |  |  | 8,683 |  |  | (1,659) |  |  | (19.1) | %
Total NOI |  | 63,319 |  |  | 63,943 |  |  | (624) |  |  | (1.0) | %
Depreciation and amortization |  | 65,324 |  |  | 68,959 |  |  | (3,635) |  |  | (5.3) | %
General and administrative |  | 12,789 |  |  | 13,933 |  |  | (1,144) |  |  | (8.2) | %
Acquisition and certain other transaction related costs |  | 1,158 |  |  | 331 |  |  | 827 |  |  | nm
Impairment of assets |  | 93,243 |  |  | 23,031 |  |  | 70,212 |  |  | nm
Gain on sale of properties |  | 1,260 |  |  | 111 |  |  | 1,149 |  |  | nm
Interest income and other expenses |  | (774) |  |  | 2,575 |  |  | (3,349) |  |  | (130.1) | %
Interest expense |  | (48,886) |  |  | (59,443) |  |  | 10,557 |  |  | (17.8) | %
Loss on modification or early extinguishment of debt |  | (11,191) |  |  | — |  |  | (11,191) |  |  | 100.0 | %
Loss before income taxes and equity in net earnings of investees |  | (168,786) |  |  | (99,068) |  |  | (69,718) |  |  | 70.4 | %
Income tax expense |  | (337) |  |  | (148) |  |  | (189) |  |  | 127.7 | %
Equity in net earnings of investees |  | 5,083 |  |  | 527 |  |  | 4,556 |  |  | nm
Net loss |  | $ | (164,040) |  |  | $ | (98,689) |  |  | $ | (65,351) |  |  | 66.2 | %

nm - not meaningful
SHOP:

|  | Comparable Properties (1) |  | All Properties
|  | As of and For the Three Months |  | As of and For the Three Months
|  | Ended September 30, |  | Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Total properties |  | 185 |  |  | 185 |  |  | 229 |  |  | 232 |
Number of units |  | 21,638 |  |  | 21,638 |  |  | 24,906 |  |  | 25,152 |
Occupancy |  | 82.4 | % |  | 81.0 | % |  | 81.5 | % |  | 79.4 | %
Average monthly rate (2) |  | $ | 5,413 |  |  | $ | 5,142 |  |  | $ | 5,472 |  |  | $ | 5,199 |

|  | Three Months Ended September 30,
|  | Comparable (1) |  | Non-Comparable |  |
|  | Properties Results |  | Properties Results |  | Consolidated Properties Results
|  |  |  |  |  | $ |  | % |  |  |  |  |  |  |  |  |  | $ |  | %
|  | 2025 |  | 2024 |  | Change |  | Change |  | 2025 |  | 2024 |  | 2025 |  | 2024 |  | Change |  | Change
Residents fees and services |  | $ | 289,378 |  |  | $ | 271,453 |  |  | $ | 17,925 |  |  | 6.6 | % |  | $ | 44,012 |  |  | $ | 40,552 |  |  | $ | 333,390 |  |  | $ | 312,005 |  |  | $ | 21,385 |  |  | 6.9 | %
Property operating expenses |  | (257,344) |  |  | (239,028) |  |  | 18,316 |  |  | 7.7 | % |  | (46,426) |  |  | (45,544) |  |  | (303,770) |  |  | (284,572) |  |  | 19,198 |  |  | 6.7 | %
NOI |  | $ | 32,034 |  |  | $ | 32,425 |  |  | $ | (391) |  |  | (1.2) | % |  | $ | (2,414) |  |  | $ | (4,992) |  |  | $ | 29,620 |  |  | $ | 27,433 |  |  | $ | 2,187 |  |  | 8.0 | %

(1)Consists of senior living communities that we have owned, are in service and reported in the same segment since July 1, 2024; excludes communities classified as held for sale, closed or out of service, if any, and planned dispositions. Properties are included in same property once stabilized for the full period in both comparison periods presented.
(2)Average monthly rate reflects the average monthly residents fees and services per occupied unit for the period presented. The average monthly rate is calculated based on the actual number of days during the period.
31

Residents fees and services. Residents fees and services are the revenues earned at our managed senior living communities. We recognize these revenues as services are provided and related fees are accrued. Residents fees and services increased at our comparable properties primarily due to increases in occupancy and average monthly rate at our communities as shown in the table above. The activity for our non-comparable properties primarily reflects the 15 communities classified as held for sale as of September 30, 2025 and nine communities transitioned to an existing third party manager during the 2024 period.
Property operating expenses. Property operating expenses consist of real estate taxes, utility expenses, insurance, wages and benefit costs of community level personnel, repairs and maintenance expense, management fees, cleaning expense and other direct costs of operating these communities. Property operating expenses increased at our comparable properties primarily due to increases in labor costs, marketing, contract labor costs and management fees as a result of higher revenues and other direct costs, partially offset by decreased insurance costs due to a reduction in premiums. The activity for our non-comparable properties primarily reflects the 15 communities classified as held for sale as of September 30, 2025 and nine communities transitioned to an existing third party manager during the 2024 period.
Net operating income. The change in NOI reflects the net changes in residents fees and services and property operating expenses described above.
Medical Office and Life Science Portfolio:

|  | Comparable Properties (1) |  | All Properties
|  | As of September 30, |  | As of September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Total properties |  | 65 |  |  | 65 |  |  | 88 |  |  | 99 |
Total square feet |  | 5,362 |  |  | 5,362 |  |  | 6,931 |  |  | 8,192 |
Occupancy |  | 93.3 | % |  | 93.3 | % |  | 86.6 | % |  | 80.8 | %

|  | Three Months Ended September 30,
|  | Comparable (1) |  | Non-Comparable |  |
|  | Properties Results |  | Properties Results |  | Consolidated Properties Results
|  |  |  |  |  | $ |  | % |  |  |  |  |  |  |  |  |  | $ |  | %
|  | 2025 |  | 2024 |  | Change |  | Change |  | 2025 |  | 2024 |  | 2025 |  | 2024 |  | Change |  | Change
Rental income |  | $ | 40,266 |  |  | $ | 40,432 |  |  | $ | (166) |  |  | (0.4) | % |  | $ | 7,935 |  |  | $ | 12,469 |  |  | $ | 48,201 |  |  | $ | 52,901 |  |  | $ | (4,700) |  |  | (8.9) | %
Property operating expenses |  | (16,417) |  |  | (16,882) |  |  | (465) |  |  | (2.8) | % |  | (5,109) |  |  | (8,192) |  |  | (21,526) |  |  | (25,074) |  |  | (3,548) |  |  | (14.2) | %
NOI |  | $ | 23,849 |  |  | $ | 23,550 |  |  | $ | 299 |  |  | 1.3 | % |  | $ | 2,826 |  |  | $ | 4,277 |  |  | $ | 26,675 |  |  | $ | 27,827 |  |  | $ | (1,152) |  |  | (4.1) | %

(1)Consists of medical office and life science properties that we have owned and which have been in service continuously since July 1, 2024; excludes properties classified as held for sale or out of service undergoing redevelopment, if any, planned dispositions and properties owned by unconsolidated joint ventures in each of which we own an equity interest. Properties are included in same property once stabilized for the full period in both comparison periods presented.
Rental income. Rental income decreased at our comparable properties primarily due to vacancies at certain of our properties, partially offset by an increase in real estate tax reimbursements at certain of our properties. Rental income decreased at our non-comparable properties primarily due to dispositions since July 1, 2024.
Property operating expenses. Property operating expenses consist of real estate taxes, utility expenses, insurance, management fees, salaries and benefit costs of property level personnel, repairs and maintenance expense, cleaning expense and other direct costs of operating these properties. The decrease in property operating expenses at our comparable properties is primarily due to a decrease in insurance costs, salaries and other direct costs. These decreases were partially offset by an increase in real estate taxes as a result of successful appeals at certain of our properties during the three months ended September 30, 2024. Property operating expenses decreased at our non-comparable properties primarily due to dispositions since July 1, 2024.
Net operating income. The change in NOI reflects the net changes in rental income and property operating expenses described above.
32

All Other (1):

|  | Comparable Properties (2) |  | All Properties
|  | As of and For the Three Months Ended September 30, |  | As of and For the Three Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Total properties: |  |  |  |  |  |  |  |
Triple net leased senior living communities |  | 8 |  |  | 8 |  |  | 8 |  |  | 27 |
Wellness centers |  | 10 |  |  | 10 |  |  | 10 |  |  | 10 |
Rent coverage: |  |  |  |  |  |  |  |
Triple net leased senior living communities (3) |  | 1.85 | x |  | 1.82 | x |  | 1.85 | x |  | 1.79 | x
Wellness centers (3) |  | 3.23 | x |  | 1.99 | x |  | 3.23 | x |  | 1.99 | x

|  | Three Months Ended September 30,
|  | Comparable (2) |  | Non-Comparable |  |
|  | Properties Results |  | Properties Results |  | Consolidated Properties Results
|  |  |  |  |  | $ |  | % |  |  |  |  |  |  |  |  |  | $ |  | %
|  | 2025 |  | 2024 |  | Change |  | Change |  | 2025 |  | 2024 |  | 2025 |  | 2024 |  | Change |  | Change
Rental income |  | $ | 7,115 |  |  | $ | 6,708 |  |  | $ | 407 |  |  | 6.1 | % |  | $ | — |  |  | $ | 2,026 |  |  | $ | 7,115 |  |  | $ | 8,734 |  |  | $ | (1,619) |  |  | (18.5) | %
Property operating expenses |  | (91) |  |  | (51) |  |  | 40 |  |  | 78.4 | % |  | — |  |  | — |  |  | (91) |  |  | (51) |  |  | 40 |  |  | 78.4 | %
NOI |  | $ | 7,024 |  |  | $ | 6,657 |  |  | $ | 367 |  |  | 5.5 | % |  | $ | — |  |  | $ | 2,026 |  |  | $ | 7,024 |  |  | $ | 8,683 |  |  | $ | (1,659) |  |  | (19.1) | %

(1)All Other operations consist of all of our other operations, including certain wellness centers and senior living communities that are leased to third party operators, which segment we do not consider to be sufficiently material to constitute a separate reportable segment, and any other income or expenses that are not attributable to a specific reportable segment.
(2)Consists of properties that we have owned and which have been reported in the same segment and leased to the same operator continuously since July 1, 2024; excludes properties classified as held for sale and planned dispositions, if any. Properties are included in same property once stabilized for the full period in both comparison periods presented.
(3)All tenant operating data presented are based upon the operating results provided by our tenants for the most recent prior period for which tenant operating results are available to us. Rent coverage is calculated using the annualized operating cash flows from our triple net lease tenants' operations of our properties, before subordinated charges, if any, divided by annualized rental income. We have not independently verified tenant operating data. Excludes data for historical periods prior to our ownership of certain properties.
Rental income. Rental income increased at our comparable properties primarily due to new leases for one of our wellness center tenants. The activity for our non-comparable properties primarily reflects the 18 triple net leased senior living communities that we sold in February 2025.
Net operating income. The change in NOI primarily reflects the change in rental income described above.
Consolidated:
Depreciation and amortization expense. Depreciation and amortization expense decreased primarily due to dispositions since July 1, 2024 and certain depreciable assets becoming fully depreciated, partially offset by the purchase of capital improvements at certain of our properties.
General and administrative expense. General and administrative expense consists of fees paid to RMR under our business management agreement, legal and accounting fees, fees and expenses of our Trustees, equity compensation expense and other costs relating to our status as a publicly traded company. General and administrative expense decreased primarily due to $5,676 of estimated incentive management fees that we recognized for the three months ended September 30, 2025, compared to $6,934 for the three months ended September 30, 2024. These incentive management fees were recorded as a result of our total shareholder return exceeding the returns for the MSCI U.S. REIT/Health Care REIT Index over the applicable measurement period.
Acquisition and certain other transaction related costs. Acquisition and certain other transaction related costs primarily represent costs incurred with acquisitions and non-recurring transactions that we expensed under GAAP. We incurred transition costs during the three months ended September 30, 2025 as a result of the management transitions of 21 communities to both new and existing third party managers. For more information about such management transitions of communities, see Note 9 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
33

Impairment of assets. For information about our asset impairment charges, see Note 3 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q and Note 3 to our consolidated financial statements included in Part IV, Item 15 of our Annual Report.
Gain on sale of properties. For information regarding loss on sale of properties, see Note 3 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
Interest income and other expenses. The decrease in interest income and other expenses is primarily due to lower average invested cash balances and interest rates during the three months ended September 30, 2025 and other expenses.
Interest expense. Interest expense decreased primarily due to the redemption during 2025 of an aggregate $380,000 of our remaining 9.75% senior unsecured notes due 2025 and a decrease in discount accretion for our senior secured notes due 2026 due to the partial redemption of an aggregate $606,164 of these notes during 2025. During the three months ended September 30, 2025 and 2024, we recognized discount accretion of $16,313 and $22,034, respectively, for our senior secured notes due 2026. These decreases were partially offset by four mortgage financings totaling $343,157 during 2025 and the issuance of $375,000 in aggregate principal amount of our 7.25% senior secured notes due 2030 in September 2025.
Loss on modification or early extinguishment of debt. During the three months ended September 30, 2025, we recorded a loss on early extinguishment of debt in connection with our partial redemption of our senior secured notes due 2026. For more information regarding our loss on modification or early extinguishment of debt, see Note 5 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
Income tax expense. Income tax expense is the result of operating income we earned in certain jurisdictions where we are subject to state income taxes.
Equity in net earnings of investees. Equity in net earnings of investees is the change in the fair value of our investments in our joint ventures and also represents our proportionate share of the earnings of our equity method investment in AlerisLife. For further information regarding our investment in AlerisLife, see Notes 3 and 11 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
34

Nine Months Ended September 30, 2025 Compared to Nine Months Ended September 30, 2024 (dollars and square feet in thousands, except average monthly rate):
Unless otherwise indicated, references in this section to changes or comparisons of results, income or expenses refer to comparisons of the results for the nine months ended September 30, 2025 to the nine months ended September 30, 2024. Our definition of NOI and our reconciliation of net income (loss) to NOI and a description of why we believe NOI is an appropriate supplemental measure are included below under the heading “Non-GAAP Financial Measures.”

|  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | $ Change |  | % Change
NOI by segment: |  |  |  |  |  |  |  |
SHOP |  | $ | 103,063 |  |  | $ | 81,127 |  |  | $ | 21,936 |  |  | 27.0 | %
Medical Office and Life Science Portfolio |  | 80,018 |  |  | 88,352 |  |  | (8,334) |  |  | (9.4) | %
All Other |  | 22,908 |  |  | 24,963 |  |  | (2,055) |  |  | (8.2) | %
Total NOI |  | 205,989 |  |  | 194,442 |  |  | 11,547 |  |  | 5.9 | %
Depreciation and amortization |  | 199,915 |  |  | 207,449 |  |  | (7,534) |  |  | (3.6) | %
General and administrative |  | 32,966 |  |  | 27,763 |  |  | 5,203 |  |  | 18.7 | %
Acquisition and certain other transaction related costs |  | 1,257 |  |  | 2,243 |  |  | (986) |  |  | (44.0) | %
Impairment of assets |  | 162,708 |  |  | 41,718 |  |  | 120,990 |  |  | nm
Gain (loss) on sale of properties |  | 103,971 |  |  | (18,976) |  |  | 122,947 |  |  | (647.9) | %
Gain on insurance recoveries |  | 7,522 |  |  | — |  |  | 7,522 |  |  | 100.0 | %
Interest income and other expenses |  | 4,307 |  |  | 7,215 |  |  | (2,908) |  |  | (40.3) | %
Interest expense |  | (157,643) |  |  | (175,721) |  |  | 18,078 |  |  | (10.3) | %
Loss on modification or early extinguishment of debt |  | (40,388) |  |  | (209) |  |  | (40,179) |  |  | nm
Loss before income tax expense and equity in net earnings (losses) of investees |  | (273,088) |  |  | (272,422) |  |  | (666) |  |  | 0.2 | %
Income tax expense |  | (1,229) |  |  | (505) |  |  | (724) |  |  | 143.4 | %
Equity in net earnings (losses) of investees |  | 9,652 |  |  | (9,882) |  |  | 19,534 |  |  | (197.7) | %
Net loss |  | $ | (264,665) |  |  | $ | (282,809) |  |  | $ | 18,144 |  |  | (6.4) | %

nm - not meaningful
SHOP:

|  | Comparable Properties (1) |  | All Properties
|  | As of and For the Nine Months Ended September 30, |  | As of and For the Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Total properties |  | 182 |  |  | 182 |  |  | 229 |  |  | 232 |
Number of units |  | 21,453 |  |  | 21,453 |  |  | 24,906 |  |  | 25,152 |
Occupancy |  | 81.6 | % |  | 80.6 | % |  | 80.8 | % |  | 79.1 | %
Average monthly rate (2) |  | $ | 5,385 |  |  | $ | 5,127 |  |  | $ | 5,442 |  |  | $ | 5,175 |

|  | Nine Months Ended September 30,
|  | Comparable (1) |  | Non-Comparable |  |
|  | Properties Results |  | Properties Results |  | Consolidated Properties Results
|  |  |  |  |  | $ |  | % |  |  |  |  |  |  |  |  |  | $ |  | %
|  | 2025 |  | 2024 |  | Change |  | Change |  | 2025 |  | 2024 |  | 2025 |  | 2024 |  | Change |  | Change
Residents fees and services |  | $ | 851,688 |  |  | $ | 802,365 |  |  | $ | 49,323 |  |  | 6.1 | % |  | $ | 137,553 |  |  | $ | 126,288 |  |  | $ | 989,241 |  |  | $ | 928,653 |  |  | $ | 60,588 |  |  | 6.5 | %
Property operating expenses |  | (743,297) |  |  | (708,069) |  |  | 35,228 |  |  | 5.0 | % |  | (142,881) |  |  | (139,457) |  |  | (886,178) |  |  | (847,526) |  |  | 38,652 |  |  | 4.6 | %
NOI |  | $ | 108,391 |  |  | $ | 94,296 |  |  | $ | 14,095 |  |  | 14.9 | % |  | $ | (5,328) |  |  | $ | (13,169) |  |  | $ | 103,063 |  |  | $ | 81,127 |  |  | $ | 21,936 |  |  | 27.0 | %

(1)Consists of senior living communities that we have owned, are in service and reported in the same segment since January 1, 2024; excludes communities classified as held for sale, closed or out of service, if any, and planned dispositions. Properties are included in same property once stabilized for the full period in both comparison periods presented.
(2)Average monthly rate reflects the average monthly residents fees and services per occupied unit for the period presented. The average monthly rate is calculated based on the actual number of days during the period.
35

Residents fees and services. Residents fees and services increased at our comparable properties primarily due to increases in occupancy and average monthly rate at our communities as shown in the table above. The activity for our non-comparable properties primarily reflects the 15 communities classified as held for sale as of September 30, 2025 and 13 communities transitioned to an existing third party manager during the 2024 period.
Property operating expenses. Property operating expenses increased at our comparable properties primarily due to increases in labor costs, management fees as a result of higher revenues, marketing and other direct costs, partially offset by decreased insurance costs due to a reduction in premiums. The activity for our non-comparable properties primarily reflects the 15 communities classified as held for sale as of September 30, 2025 and 13 communities transitioned to an existing third party manager during the 2024 period.
Net operating income. The change in NOI reflects the net changes in residents fees and services and property operating expenses described above.
Medical Office and Life Science Portfolio:

|  | Comparable Properties (1) |  | All Properties
|  | As of September 30, |  | As of September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Total properties |  | 64 |  |  | 64 |  |  | 88 |  |  | 99 |
Total square feet |  | 5,350 |  |  | 5,350 |  |  | 6,931 |  |  | 8,192 |
Occupancy |  | 93.3 | % |  | 93.3 | % |  | 86.6 | % |  | 80.8 | %

|  | Nine Months Ended September 30,
|  | Comparable (1) |  | Non-Comparable |  |
|  | Properties Results |  | Properties Results |  | Consolidated Properties Results
|  |  |  |  |  | $ |  | % |  |  |  |  |  |  |  |  |  | $ |  | %
|  | 2025 |  | 2024 |  | Change |  | Change |  | 2025 |  | 2024 |  | 2025 |  | 2024 |  | Change |  | Change
Rental income |  | $ | 119,518 |  |  | $ | 121,021 |  |  | $ | (1,503) |  |  | (1.2) | % |  | $ | 26,502 |  |  | $ | 40,584 |  |  | $ | 146,020 |  |  | $ | 161,605 |  |  | $ | (15,585) |  |  | (9.6) | %
Property operating expenses |  | (47,834) |  |  | (47,506) |  |  | 328 |  |  | 0.7 | % |  | (18,168) |  |  | (25,747) |  |  | (66,002) |  |  | (73,253) |  |  | (7,251) |  |  | (9.9) | %
NOI |  | $ | 71,684 |  |  | $ | 73,515 |  |  | $ | (1,831) |  |  | (2.5) | % |  | $ | 8,334 |  |  | $ | 14,837 |  |  | $ | 80,018 |  |  | $ | 88,352 |  |  | $ | (8,334) |  |  | (9.4) | %

(1)Consists of medical office and life science properties that we have owned and which have been in service continuously since January 1, 2024; excludes properties classified as held for sale or out of service undergoing redevelopment, if any, planned dispositions and properties owned by unconsolidated joint ventures in each of which we own an equity interest. Properties are included in same property once stabilized for the full period in both comparison periods presented.
Rental income. Rental income decreased at our comparable properties primarily due to vacancies at certain of our properties and the write off of straight line rent for a former tenant at one of our properties, partially offset by a termination fee from this former tenant totaling $600 paid during the nine months ended September 30, 2025. This space was subsequently re-leased to another tenant in April 2025. Rental income decreased at our non-comparable properties primarily due to dispositions since January 1, 2024.
Property operating expenses. Property operating expenses increased at our comparable properties primarily due to an increase in HVAC expenses and snow removal costs, partially offset by a decrease in insurance and other direct costs. Property operating expenses decreased at our non-comparable properties primarily due to dispositions since January 1, 2024.
Net operating income. The change in NOI reflects the net changes in rental income and property operating expenses described above.
36

All Other(1):

|  | Comparable Properties (2) |  | All Properties
|  | As of and For the Nine Months Ended September 30, |  | As of and For the Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Total properties: |  |  |  |  |  |  |  |
Triple net leased senior living communities |  | 8 |  |  | 8 |  |  | 8 |  |  | 27 |
Wellness centers |  | 10 |  |  | 10 |  |  | 10 |  |  | 10 |
Rent coverage: |  |  |  |  |  |  |  |
Triple net leased senior living communities (3) |  | 1.85 | x |  | 1.82 | x |  | 1.85 | x |  | 1.79 | x
Wellness centers (3) |  | 3.23 | x |  | 1.99 | x |  | 3.23 | x |  | 1.99 | x

|  | Nine Months Ended September 30,
|  | Comparable (2) |  | Non-Comparable |  |
|  | Properties Results |  | Properties Results |  | Consolidated Properties Results
|  |  |  |  |  | $ |  | % |  |  |  |  |  |  |  |  |  | $ |  | %
|  | 2025 |  | 2024 |  | Change |  | Change |  | 2025 |  | 2024 |  | 2025 |  | 2024 |  | Change |  | Change
Rental income |  | $ | 21,346 |  |  | $ | 19,313 |  |  | $ | 2,033 |  |  | 10.5 | % |  | $ | 1,675 |  |  | $ | 6,237 |  |  | $ | 23,021 |  |  | $ | 25,550 |  |  | $ | (2,529) |  |  | (9.9) | %
Property operating expenses |  | (110) |  |  | (543) |  |  | (433) |  |  | (79.7) | % |  | (3) |  |  | (44) |  |  | (113) |  |  | (587) |  |  | (474) |  |  | (80.7) | %
NOI |  | $ | 21,236 |  |  | $ | 18,770 |  |  | $ | 2,466 |  |  | 13.1 | % |  | $ | 1,672 |  |  | $ | 6,193 |  |  | $ | 22,908 |  |  | $ | 24,963 |  |  | $ | (2,055) |  |  | (8.2) | %

(1)All Other operations consist of all of our other operations, including certain wellness centers and senior living communities that are leased to third party operators, which segment we do not consider to be sufficiently material to constitute a separate reportable segment, and any other income or expenses that are not attributable to a specific reportable segment.
(2)Consists of properties that we have owned and which have been reported in the same segment and leased to the same operator continuously since January 1, 2024; excludes properties classified as held for sale and planned dispositions, if any. Properties are included in same property once stabilized for the full period in both comparison periods presented.
(3)All tenant operating data presented are based upon the operating results provided by our tenants for the most recent prior period for which tenant operating results are available to us. Rent coverage is calculated using the annualized operating cash flows from our triple net lease tenants' operations of our properties, before subordinated charges, if any, divided by annualized rental income. We have not independently verified tenant operating data. Excludes data for historical periods prior to our ownership of certain properties.
Rental income. Rental income increased at our comparable properties primarily due to new leases for one of our wellness center tenants. The activity for our non-comparable properties primarily reflects the 18 triple net leased senior living communities that we sold in February 2025.
Property operating expenses. The decrease in property operating expenses for our comparable properties primarily reflects real estate taxes and other expenses paid directly by our tenants during the nine months ended September 30, 2025, which were previously paid by us during prior periods.
Net operating income. The change in NOI reflects the net changes in rental income and property operating expenses described above.
Consolidated:
Depreciation and amortization expense. Depreciation and amortization expense decreased primarily due to dispositions since January 1, 2024 and certain depreciable assets becoming fully depreciated, partially offset by the purchase of capital improvements at certain of our properties.
General and administrative expense. General and administrative expense increased primarily due to $12,231 of estimated incentive management fees that we recognized for the nine months ended September 30, 2025 compared to $6,934 for the nine months ended September 30, 2024. These incentive management fees were recorded as a result of our total shareholder return exceeding the returns for the MSCI U.S. REIT/Health Care REIT Index over the applicable measurement period.
Acquisition and certain other transaction related costs. We incurred transition costs during the nine months ended September 30, 2025 as a result of our transition of 21 communities to both new and existing third party managers. We incurred transition costs, including termination and other fees, during the 2024 period as a result of the management transitions of 13 communities to an existing third party manager. For more information about such management transitions of communities, see Note 9 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
37

Impairment of assets. For information about our asset impairment charges, see Note 3 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q and Note 3 to our consolidated financial statements included in Part IV, Item 15 of our Annual Report.
Gain (loss) on sale of properties. For information regarding gain (loss) on sale of properties, see Note 3 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q and Note 3 to our consolidated financial statements included in Part IV, Item 15 of our Annual Report.
Gain on insurance recoveries. During the nine months ended September 30, 2025, we recognized a gain on insurance recoveries related to cash received from our insurance provider in excess of our losses for a claim that was finalized. For further information regarding this gain on insurance recoveries, see Note 3 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
Interest income and other expenses. The decrease in interest income and other expenses is primarily due to lower average invested cash balances and interest rates during the nine months ended September 30, 2025 compared to the 2024 period.
Interest expense. Interest expense decreased primarily due to the redemption during 2025 of an aggregate $380,000 of our remaining 9.75% senior unsecured notes due 2025. Additionally, there was a decrease in discount accretion for our senior secured notes due 2026 due to the partial redemption of an aggregate $606,164 of these notes during 2025. During the nine months ended September 30, 2025 and 2024, we recognized discount accretion of $54,742 and $64,133, respectively, for our senior secured notes due 2026. These decreases were partially offset by four mortgage financings totaling $343,157 during 2025, the execution of a $120,000 mortgage loan in May 2024 at a fixed interest rate of 6.864% per annum and the issuance of $375,000 in aggregate principal amount of our 7.25% senior secured notes due 2030 in September 2025.
Loss on modification or early extinguishment of debt. During the nine months ended September 30, 2025, we recorded a loss on early extinguishment of debt in connection with the partial redemption of an aggregate $606,164 of our outstanding senior secured notes due 2026 and with the redemption of all $380,000 of our remaining 9.75% senior secured notes due 2025. For more information regarding our loss on modification or early extinguishment of debt, see Note 5 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
Income tax expense. Income tax expense is the result of operating income we earned in certain jurisdictions where we are subject to state income taxes.
Equity in net earnings (losses) of investees. Equity in net earnings (losses) of investees is the change in the fair value of our investments in our joint ventures and also represents our proportionate share of the earnings of our equity method investment in AlerisLife. For further information regarding our investment in AlerisLife, see Notes 3 and 11 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
38

Non-GAAP Financial Measures (dollars in thousands, except per share amounts)
We present certain "non-GAAP financial measures" within the meaning of the applicable rules of the Securities and Exchange Commission, or the SEC, including funds from operations, or FFO, normalized funds from operations, or Normalized FFO, and NOI for the three and nine months ended September 30, 2025 and 2024. These measures do not represent cash generated by operating activities in accordance with GAAP and should not be considered alternatives to net income (loss) as indicators of our operating performance or as measures of our liquidity. These measures should be considered in conjunction with net income (loss) as presented in our condensed consolidated statements of comprehensive income (loss). We consider these non-GAAP measures to be appropriate supplemental measures of operating performance for a REIT, along with net income (loss). We believe these measures provide useful information to investors because by excluding the effects of certain historical amounts, such as depreciation and amortization, they may facilitate a comparison of our operating performance between periods and with other REITs and, in the case of NOI, reflecting only those income and expense items that are generated and incurred at the property level may help both investors and management to understand the operations of our properties.
Funds From Operations and Normalized Funds From Operations
We calculate FFO and Normalized FFO as shown below. FFO is calculated on the basis defined by the National Association of Real Estate Investment Trusts, which is net income (loss), calculated in accordance with GAAP, excluding any gain or loss on sale of properties, equity in net earnings or losses of investees, loss on impairment of real estate assets, gains or losses on equity securities, net, if any, and including adjustments to reflect our proportionate share of FFO of our equity method investees, plus real estate depreciation and amortization of consolidated properties, as well as certain other adjustments currently not applicable to us. In calculating Normalized FFO, we adjust for the items shown below, including similar adjustments for our unconsolidated joint ventures, if any, and incentive management fees, if any. FFO and Normalized FFO are among the factors considered by our Board of Trustees when determining the amount of distributions to our shareholders. Other factors include, but are not limited to, requirements to maintain our qualification for taxation as a REIT, limitations in the agreements governing our debt, the availability to us of debt and equity capital, our expectation of our future capital requirements and operating performance and our expected needs for and availability of cash to pay our obligations. Other real estate companies and REITs may calculate FFO and Normalized FFO differently than we do.
Our calculations of FFO and Normalized FFO for the three and nine months ended September 30, 2025 and 2024 and reconciliations of net income (loss), the most directly comparable financial measure under GAAP reported in our condensed consolidated financial statements, to FFO and Normalized FFO appear in the following table. This table also provides a comparison of distributions to shareholders, FFO and Normalized FFO and net income (loss) per share for these periods.
39

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Net loss |  | $ | (164,040) |  |  | $ | (98,689) |  |  | $ | (264,665) |  |  | $ | (282,809) |
Depreciation and amortization |  | 65,324 |  |  | 68,959 |  |  | 199,915 |  |  | 207,449 |
(Gain) loss on sale of properties |  | (1,260) |  |  | (111) |  |  | (103,971) |  |  | 18,976 |
Impairment of assets |  | 93,243 |  |  | 23,031 |  |  | 162,708 |  |  | 41,718 |
Equity in net (earnings) losses of investees |  | (5,083) |  |  | (527) |  |  | (9,652) |  |  | 9,882 |
Share of FFO from unconsolidated joint ventures |  | 2,199 |  |  | 2,273 |  |  | 7,651 |  |  | 6,334 |
Adjustments to reflect our share of FFO attributable to an equity method investment |  | 3,731 |  |  | 1,698 |  |  | 5,699 |  |  | 12,235 |
FFO |  | (5,886) |  |  | (3,366) |  |  | (2,315) |  |  | 13,785 |
Incentive management fees (1) |  | 5,676 |  |  | 6,934 |  |  | 12,231 |  |  | 6,934 |
Acquisition and certain other transaction related costs |  | 1,158 |  |  | 331 |  |  | 1,257 |  |  | 2,243 |
Gain on insurance recoveries |  | — |  |  | — |  |  | (7,522) |  |  | — |
Loss on modification or early extinguishment of debt |  | 11,191 |  |  | — |  |  | 40,388 |  |  | 209 |
Adjustments to reflect our share of Normalized FFO attributable to an equity method investment |  | (2,418) |  |  | 127 |  |  | (1,441) |  |  | (8,792) |
Normalized FFO |  | $ | 9,721 |  |  | $ | 4,026 |  |  | $ | 42,598 |  |  | $ | 14,379 |
Weighted average common shares outstanding (basic and diluted) |  | 240,385 |  |  | 239,667 |  |  | 240,160 |  |  | 239,396 |
Per common share data (basic and diluted): |  |  |  |  |  |  |  |
Net loss |  | $ | (0.68) |  |  | $ | (0.41) |  |  | $ | (1.10) |  |  | $ | (1.18) |
FFO |  | $ | (0.02) |  |  | $ | (0.01) |  |  | $ | (0.01) |  |  | $ | 0.06 |
Normalized FFO |  | $ | 0.04 |  |  | $ | 0.02 |  |  | $ | 0.18 |  |  | $ | 0.06 |
Distributions declared |  | $ | 0.01 |  |  | $ | 0.01 |  |  | $ | 0.03 |  |  | $ | 0.03 |

(1)Incentive management fees are estimated and accrued for during the applicable measuring period. Actual incentive management fees will be calculated based on common share total return, as defined in our business management agreement, for the three-year period ending December 31 for the applicable calendar year, are included in general and administrative expenses in our condensed consolidated statements of comprehensive income (loss) and will be payable to RMR in January of the following calendar year. In calculating net income (loss) in accordance with GAAP, we recognize estimated incentive management fees expense, if any, in the first, second and third quarters. Although we recognize this expense, if any, in the first, second and third quarters for purposes of calculating net income (loss), we do not include these amounts in the calculation of Normalized FFO until the fourth quarter, when the amount of the incentive management fees expense for the calendar year, if any, is determined.
Property Net Operating Income (NOI)
We calculate NOI as shown below. The calculation of NOI excludes certain components of net income (loss) in order to provide results that are more closely related to our property level results of operations. We define NOI as income from our real estate less our property operating expenses. NOI excludes depreciation and amortization. We use NOI to evaluate individual and company-wide property level performance. Other real estate companies and REITs may calculate NOI differently than we do.
40

The calculation of NOI by reportable segment is included above in this Item 2. The following table includes the reconciliation of net loss to NOI for the three and nine months ended September 30, 2025 and 2024.

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Reconciliation of Net Loss to NOI: |  |  |  |  |  |  |  |
Net loss |  | $ | (164,040) |  |  | $ | (98,689) |  |  | $ | (264,665) |  |  | $ | (282,809) |
Equity in net (earnings) losses of investees |  | (5,083) |  |  | (527) |  |  | (9,652) |  |  | 9,882 |
Income tax expense |  | 337 |  |  | 148 |  |  | 1,229 |  |  | 505 |
Loss before income taxes and equity in net earnings (losses) of investees |  | (168,786) |  |  | (99,068) |  |  | (273,088) |  |  | (272,422) |
Loss on modification or early extinguishment of debt |  | 11,191 |  |  | — |  |  | 40,388 |  |  | 209 |
Interest expense |  | 48,886 |  |  | 59,443 |  |  | 157,643 |  |  | 175,721 |
Interest income and other expenses |  | 774 |  |  | (2,575) |  |  | (4,307) |  |  | (7,215) |
Gain on insurance recoveries |  | — |  |  | — |  |  | (7,522) |  |  | — |
(Gain) loss on sale of properties |  | (1,260) |  |  | (111) |  |  | (103,971) |  |  | 18,976 |
Impairment of assets |  | 93,243 |  |  | 23,031 |  |  | 162,708 |  |  | 41,718 |
Acquisition and certain other transaction related costs |  | 1,158 |  |  | 331 |  |  | 1,257 |  |  | 2,243 |
General and administrative |  | 12,789 |  |  | 13,933 |  |  | 32,966 |  |  | 27,763 |
Depreciation and amortization |  | 65,324 |  |  | 68,959 |  |  | 199,915 |  |  | 207,449 |
Total NOI |  | $ | 63,319 |  |  | $ | 63,943 |  |  | $ | 205,989 |  |  | $ | 194,442 |
SHOP NOI |  | $ | 29,620 |  |  | $ | 27,433 |  |  | $ | 103,063 |  |  | $ | 81,127 |
Medical Office and Life Science Portfolio NOI |  | 26,675 |  |  | 27,827 |  |  | 80,018 |  |  | 88,352 |
All Other NOI |  | 7,024 |  |  | 8,683 |  |  | 22,908 |  |  | 24,963 |
Total NOI |  | $ | 63,319 |  |  | $ | 63,943 |  |  | $ | 205,989 |  |  | $ | 194,442 |

LIQUIDITY AND CAPITAL RESOURCES (dollars in thousands)
Our principal sources of cash to meet operating and capital expenses, pay our debt service obligations and make distributions to our shareholders are the operating cash flows we generate as rental income from our leased properties, residents fees and services revenues from our managed communities and proceeds from the disposition of certain properties. We believe that these sources of funds will be sufficient to meet our operating and capital expenses, pay our debt service obligations and make distributions to our shareholders for at least the next 12 months and for the foreseeable future thereafter. Our future cash flows from operating activities will depend primarily upon:
•our ability to receive rents from our tenants;
•our ability to maintain or increase the occupancy of, and the rates at, our properties;
•our and our managers' abilities to control operating expenses and capital expenses at our properties, including increased operating expenses that we may incur in response to wage and commodity price inflation, limited labor availability and increased insurance costs; and
•our managers' abilities to maintain or increase our returns from our managed senior living communities.
41

Table of Contents
The following is a summary of our sources and uses of cash flows for the periods presented, as reflected in our condensed consolidated statements of cash flows:

|  | Nine Months Ended September 30,
|  | 2025 |  | 2024
Cash and cash equivalents and restricted cash at beginning of period |  | $ | 149,854 |  |  | $ | 246,961 |
Net cash provided by (used in): |  |  |  |
Operating activities |  | 492 |  |  | 94,028 |
Investing activities |  | 276,154 |  |  | (120,882) |
Financing activities |  | (216,877) |  |  | 41,293 |
Cash and cash equivalents and restricted cash at end of period |  | $ | 209,623 |  |  | $ | 261,400 |

Our Operating Liquidity and Resources
We generally receive minimum rents from tenants at our medical office and life science properties, triple net leased wellness centers and senior living communities monthly, we receive residents fees and services revenues, net of expenses, from our managed senior living communities monthly and we receive percentage rents from tenants at certain of our triple net senior living communities monthly, quarterly or annually.
The decrease in cash provided by operating activities for the nine months ended September 30, 2025 compared to the prior period was primarily due to the accreted interest of $86,992 paid during the 2025 period as a result of the partial redemption of our outstanding senior secured notes due 2026.
Our Investing Liquidity and Resources
The change in cash provided by (used in) investing activities for the nine months ended September 30, 2025 compared to the prior period was primarily due to an increase in proceeds from the sale of properties, a $28,000 cash distribution paid to us by the Seaport JV, aggregate cash dividends of $20,400 paid to us by AlerisLife, a reduction in real estate improvements and our purchase on February 16, 2024 of approximately 34.0% of the then outstanding AlerisLife common shares from ABP Trust at the tender offer price of $1.31 per share for a total purchase price, including transaction related costs, of $15,459. These changes were partially offset by $8,500 of contributions made to the Seaport JV in the 2025 period.
42

Table of Contents
The following is a summary of capital expenditures, development, redevelopment and other activities for the periods presented:

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
SHOP fixed assets and capital improvements |  | $ | 33,306 |  |  | $ | 27,923 |  |  | $ | 78,704 |  |  | $ | 59,637 |
Medical Office and Life Science Portfolio capital expenditures: |  |  |  |  |  |  |  |
Lease related costs (1) |  | 4,961 |  |  | 3,504 |  |  | 12,336 |  |  | 15,942 |
Building improvements (2) |  | 2,295 |  |  | 1,359 |  |  | 5,337 |  |  | 4,130 |
Recurring capital expenditures - Medical Office and Life Science Portfolio |  | 7,256 |  |  | 4,863 |  |  | 17,673 |  |  | 20,072 |
Wellness centers lease related costs (1) |  | — |  |  | 5,488 |  |  | — |  |  | 17,002 |
Total recurring capital expenditures |  | $ | 40,562 |  |  | $ | 38,274 |  |  | $ | 96,377 |  |  | $ | 96,711 |
Development, redevelopment and other activities - SHOP (3) |  | $ | 1,865 |  |  | $ | 11,714 |  |  | $ | 12,093 |  |  | $ | 18,608 |
Development, redevelopment and other activities - Medical Office and Life Science Portfolio (3) |  | 175 |  |  | 537 |  |  | 175 |  |  | 2,362 |
Total development, redevelopment and other activities |  | $ | 2,040 |  |  | $ | 12,251 |  |  | $ | 12,268 |  |  | $ | 20,970 |
Capital expenditures by segment: |  |  |  |  |  |  |  |
SHOP |  | $ | 35,171 |  |  | $ | 39,637 |  |  | $ | 90,797 |  |  | $ | 78,245 |
Medical Office and Life Science Portfolio |  | 7,431 |  |  | 5,400 |  |  | 17,848 |  |  | 22,434 |
All Other - wellness centers |  | — |  |  | 5,488 |  |  | — |  |  | 17,002 |
Total capital expenditures |  | $ | 42,602 |  |  | $ | 50,525 |  |  | $ | 108,645 |  |  | $ | 117,681 |

(1)Includes capital expenditures to improve tenants' space or amounts paid directly to tenants to improve their space and other leasing related costs, such as brokerage commissions and tenant inducements.
(2)Includes capital expenditures to replace obsolete building components that extend the useful life of existing assets or other improvements to increase the marketability of the property.
(3)Includes capital expenditures that reposition a property or result in change of use or new sources of revenue.
We generally plan to continue investing capital in our properties, including redevelopment projects, to better position these properties in their respective markets in order to increase our returns in future years.
As of September 30, 2025, we had estimated unspent leasing related obligations at our medical office and life science properties of approximately $22,615, of which we expect to spend approximately $20,405 during the next 12 months. We expect to fund these obligations using operating cash flows, cash on hand, proceeds from the disposition of certain properties and future financing activities.
We are currently in the process of redeveloping certain properties, primarily our managed senior living communities. We continue to assess opportunities to redevelop other properties in our SHOP segment and Medical Office and Life Science Portfolio segment. These redevelopment projects may require significant capital expenditures and time to complete and we may defer certain redevelopment projects to preserve liquidity. Additionally, due to labor availability constraints and wage and commodity price inflation, the capital investments we plan to make may be delayed or cost more than we expect.
During the nine months ended September 30, 2025, we sold 32 properties for an aggregate sales price of $353,675, excluding closing costs. Subsequent to September 30, 2025, we sold 12 properties for an aggregate sales price of $42,130, excluding closing costs. As of November 3, 2025, we had 38 properties under agreements or letters of intent to sell for an aggregate sales price of $237,219, excluding closing costs. The net proceeds from the sales of 12 of these properties, which have an expected aggregate sales price, excluding closing costs, of $90,529, are required to be used to partially redeem our outstanding senior secured notes due 2026, if the sales of such properties are completed. We may not complete the sales of any or all of the properties we currently plan to sell. Also, we may sell some or all of these properties at amounts that are less than currently expected and/or less than the carrying values of such properties and we may incur losses on any such sales as a result.
43

Table of Contents
For further information regarding our dispositions, see Note 3 to our Consolidated Financial Statements included in Part IV, Item 15 of this Annual Report on Form 10-K.
On February 14, 2025, AlerisLife paid an aggregate cash dividend of $50,000 to its stockholders. Our pro rata share of this cash dividend was $17,000.
On July 15, 2025, AlerisLife paid an aggregate cash dividend of $10,000 to its stockholders. Our pro rata share of this cash dividend was $3,400.
On August 21, 2025, the Seaport JV paid an aggregate cash distribution of $280,000 to its investors in connection with the $1,000,000 refinancing of its prior mortgage loan in August 2025. Our pro rata share of this cash distribution was $28,000.
Our Financing Liquidity and Resources
The change in cash (used in) provided by financing activities for the nine months ended September 30, 2025 compared to the prior period was primarily due to the redemption of our outstanding senior secured notes due 2025 and partial redemption of our outstanding senior secured notes due 2026, partially offset by our issuance of $375,000 in aggregate principal amount of our 7.25% senior secured notes due 2030 in a private offering raising net proceeds of $364,726, after deducting discounts and commissions to the initial purchasers and other estimated fees and expenses. Additionally, we executed four mortgage financings for aggregate proceeds, excluding closing costs, of $343,157 in the 2025 period.
In June 2025, we obtained a $150,000 revolving credit facility secured by 14 SHOP communities. Our revolving credit facility is available for general business purposes, including acquisitions. We can borrow, repay and reborrow funds available under our revolving credit facility, and no principal repayments are due, until maturity. Availability of borrowings under our credit agreement is subject to satisfying certain financial covenants and other credit facility conditions. Our revolving credit facility matures in June 2029 and we have two six-month extension options for the maturity date of the facility, subject to satisfaction of certain conditions and payment of an extension fee.
Interest payable on borrowings under our revolving credit facility is based on SOFR plus a premium of 2.50% to 3.00%, depending on our net leverage ratio, as defined in our credit agreement, which was 2.50% as of September 30, 2025. We also pay an unused commitment fee of 25 to 35 basis points per annum based on amounts outstanding under our revolving credit facility. As of September 30, 2025, the annual interest rate payable on borrowings under our revolving credit facility was 6.84%. As of September 30, 2025 and November 3, 2025, we had no borrowings under our revolving credit facility and $150,000 available for borrowings.
As of September 30, 2025, we had $201,371 of cash and cash equivalents. We typically use cash balances, net proceeds from offerings of securities, debt issuances or dispositions of assets and cash flows from our operations to fund our operations, debt repayments, distributions, acquisitions, investments, capital expenditures and other general business purposes.
During the nine months ended September 30, 2025, we paid quarterly cash distributions to our shareholders totaling approximately $7,240 using existing cash balances. On October 9, 2025, we declared a quarterly distribution payable to common shareholders of record on October 27, 2025 in the amount of $0.01 per share, or approximately $2,421. We expect to pay this distribution on or about November 13, 2025 using cash on hand. For further information regarding the distribution we paid during 2025, see Note 7 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
We believe we may have access to various types of financings, including debt or equity offerings, to fund our operations and repay our debts and other obligations as they become due. Our ability to complete, and the costs associated with, future debt or equity transactions depends primarily upon market conditions and our then creditworthiness and our ability to be in compliance with our debt covenants. We have no control over market conditions. Our credit and debt ratings depend upon evaluations by credit rating agencies of our business practices and plans, including our ability to maintain our earnings, our liquidity position, to stagger our debt maturities and to balance our use of debt and equity capital so that our financial performance and leverage ratios afford us flexibility to withstand any reasonably anticipated adverse changes. Similarly, our ability to raise equity capital in the future will depend primarily upon equity capital market conditions and our ability to conduct our business to maintain and grow our operating cash flows. We intend to conduct our business activities in a manner which will afford us reasonable access to capital for investment and financing activities, but we cannot be sure that we will be able to successfully carry out that intention. A protracted negative impact on the economy or the industries in which our properties and businesses operate resulting from wage and commodity price inflation, high interest rates, geopolitical risks or other economic, market or industry conditions, including the delayed recovery of the senior housing industry, economic downturns and a
44

Table of Contents
possible recession, may have various negative consequences including a decline in financing availability and increased costs for financing. Further, those conditions could also disrupt capital markets and limit our access to financing from public sources, particularly if the global financial markets experience significant disruptions.
Our $334,370 in outstanding senior secured notes due 2026 are fully and unconditionally guaranteed, on a joint, several and senior secured basis, by the 2026 Collateral Guarantors, and on a joint, several and unsecured basis, by all of our subsidiaries other than the 2026 Collateral Guarantors and certain excluded subsidiaries. These notes and the guarantees provided by the 2026 Collateral Guarantors are secured by a first priority lien and security interest in each of the collateral properties and 100% of the equity interests in each of the 2026 Collateral Guarantors. No cash interest will accrue on these notes prior to maturity. The accreted value of these notes will increase at a rate of 11.25% per annum compounded semiannually on January 15 and July 15 of each year. We have a one-time option to extend the maturity date of these senior secured notes by one year, to January 15, 2027, subject to satisfaction of certain conditions and payment of an extension fee. If we exercise this option, interest payments will be due semiannually during the extension period at an initial interest rate of 11.25% with increases of 50 basis points every 90 days these senior secured notes remain outstanding. During the nine months ended September 30, 2025, we sold 22 properties that secured our senior secured notes due 2026 and used aggregate net proceeds of $299,158 from the sales of these properties to partially redeem these senior secured notes. In October 2025, we used net proceeds of $10,249 from the sale of one property to partially redeem our outstanding senior secured notes due 2026. We are currently under agreements or letters of intent to sell 12 properties securing our senior secured notes due 2026 for an aggregate sales price of $90,529, excluding closing costs. The net proceeds from these sales are required to be used to partially redeem these senior secured notes, if these sales are completed.
In March 2025, we executed a $140,000 floating rate mortgage loan secured by 14 SHOP communities. This mortgage loan matures in March 2028 and requires that interest be paid at an annual rate of SOFR plus a premium of 2.50% with interest-only payments through April 2027, and we have two six-month extension options of the interest-only period, subject to satisfaction of certain conditions. In connection with this mortgage loan, we have purchased an interest rate cap with a SOFR strike rate equal to 4.50% pursuant to the terms of the applicable loan agreement.
In April 2025, we executed a $108,873 fixed rate mortgage financing secured by seven SHOP communities. These mortgage loans mature in May 2035 and require that interest be paid at an annual rate of 6.22% with interest-only payments through May 2030.
In May 2025, we executed a $64,000 fixed rate mortgage loan secured by four SHOP communities. This mortgage loan matures in June 2030 and requires that interest be paid at an annual rate of 6.57%.
In May 2025, we executed a $30,284 fixed rate mortgage financing secured by two SHOP communities. These mortgage loans mature in June 2035 and require that interest be paid at an annual rate of 6.36% with interest-only payments through June 2028.
From April through June 2025, we used the net proceeds from these 2025 mortgage financings, together with cash on hand, to fully redeem the remaining $380,000 principal balance of our 9.75% senior unsecured notes due June 2025. Our next significant debt maturity is $334,370 in outstanding senior secured notes with a maturity date of January 15, 2026, which is subject to a one-time option to extend the maturity date by one year, to January 15, 2027.
In September 2025, we issued $375,000 in aggregate principal amount of our 7.25% senior secured notes due 2030 in a private offering raising net proceeds of $364,726, after deducting discounts and commissions to the initial purchasers and other estimated fees and expenses. These notes are fully and unconditionally guaranteed, on a joint, several and senior secured basis, by the 2030 Collateral Guarantors, and on a joint, several and unsecured basis, by all of our subsidiaries other than the 2030 Collateral Guarantors and certain excluded subsidiaries. These notes and the guarantees provided by the 2030 Collateral Guarantors are secured by a first priority lien and security interest on 100% of the equity interests in each of the 2030 Collateral Guarantors. These notes require semi-annual interest payments through maturity. We used the net proceeds from this offering to partially redeem $307,006 of our then outstanding $641,376 senior secured notes due 2026.
For further information regarding our outstanding debt, see Note 5 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
In August 2025, Moody's Investors Service, or Moody's, upgraded our issuer credit rating from Caa3 to Caa1, senior secured notes due 2026 rating from Caa2 to B3, our 4.375% senior notes due 2031 rating from Caa3 to Caa1, and our senior unsecured notes from Ca to Caa2.
45

Table of Contents
In September 2025, S&P Global, or S&P, upgraded our issuer credit rating from CCC+ to B-, our senior secured notes due 2026 and our 4.375% senior notes due 2031 ratings from B to B+ and our senior unsecured notes note rating from CCC+ to B-. Additionally, S&P rated our 7.25% senior secured notes due 2030 as B+.
Debt Covenants (dollars in thousands)
Our principal debt obligations at September 30, 2025 were: (1) $1,600,000 outstanding principal amount of senior unsecured notes; (2) $709,370 outstanding principal amount of senior secured notes; (3) $329,175 aggregate principal amount of mortgage notes (excluding discounts, premiums and net debt issuance costs) secured by 36 properties; and (4) $140,000 principal amount floating rate mortgage loan (excluding discounts, premiums and net debt issuance costs) secured by 14 properties. For further information regarding our indebtedness, see Note 5 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
Our senior notes are governed by our senior notes indentures and their supplements. Our credit agreement, our mortgage loan agreements and our senior notes indentures and their supplements provide for acceleration of payment of all amounts outstanding upon the occurrence and continuation of certain events of default. Our credit agreement and our senior notes indentures and their supplements also contain covenants that restrict our ability to incur debts, including debts secured by mortgages on our properties, in excess of calculated amounts and require us to maintain various financial ratios. As of September 30, 2025, we believe we were in compliance with all of the covenants under our debt agreements. Although we continue to take steps to enhance our ability to maintain sufficient liquidity, as noted elsewhere in this Quarterly Report on Form 10-Q, a protracted negative impact on the economy or the industries in which our properties and businesses operate resulting from wage or commodity price inflation, high interest rates, geopolitical risks or other economic, market or industry conditions, including the delayed recovery of the senior housing industry, economic downturns or a possible recession, may cause increased pressure on our ability to satisfy financial and other covenants. If our operating results and financial condition are significantly negatively impacted by economic conditions or otherwise, we may fail to satisfy our debt covenants and conditions.
Our senior notes indentures and their supplements do not contain provisions for acceleration which could be triggered by our debt ratings. See "—Our Financing Liquidity and Resources" above for information regarding recent changes to our issuer credit rating and senior debt ratings.
Our revolving credit facility contains cross default provisions to any other debts of more than $25,000. Our senior unsecured notes indentures and their supplements contain cross default provisions to any other debts of more than $20,000 ($50,000 or more in the case of our senior notes indentures and supplements entered in February 2016, February 2018, June 2020, February 2021 and December 2023).
The loan agreements governing the aggregate $1,000,000 secured debt financing related to the Seaport JV contain customary covenants and provide for acceleration of payment of all amounts due thereunder upon the occurrence and continuation of certain events of default. We provide certain limited recourse guaranties on this debt, with our liability limited to $100,000. The debt secured by the properties included in the LSMD JV in which we own a 20% equity interest is guaranteed by this joint venture and is non-recourse to us.
Supplemental Guarantor Information (dollars in thousands)
On February 3, 2021, we issued $500,000 of our 4.375% senior notes due 2031. As of September 30, 2025, all $500,000 of our 4.375% senior notes due 2031 were fully and unconditionally guaranteed, on a joint, several and unsecured basis, by all of our subsidiaries except certain excluded subsidiaries. The notes and related guarantees are effectively subordinated to all of our and the subsidiary guarantors' secured indebtedness, respectively, to the extent of the value of the applicable collateral, and are structurally subordinated to all indebtedness and other liabilities and any preferred equity of any of our subsidiaries that do not guarantee the notes. Our remaining $1,100,000 of senior unsecured notes do not have the benefit of any guarantees.
A subsidiary guarantor's guarantee of our 4.375% senior notes due 2031 and all other obligations of such subsidiary guarantor under the indenture governing the notes will automatically terminate and such subsidiary guarantor will automatically be released from all of its obligations under such subsidiary guarantee and the indenture under certain circumstances, including on or after the date (a) the notes have an investment grade rating from two rating agencies and one of such investment grade ratings is a mid-BBB investment grade rating and (b) no default or event of default has occurred and is continuing under the indenture. Our non-guarantor subsidiaries are separate and distinct legal entities and have no obligation, contingent or otherwise, to pay any amounts due on our 4.375% senior notes due 2031 or their guarantees, or to make any funds available therefor, whether by dividend, distribution, loan or other payments. The rights of holders of our 4.375% senior notes due 2031
46

Table of Contents
to benefit from any of the assets of our non-guarantor subsidiaries are subject to the prior satisfaction of claims of those subsidiaries' creditors and any preferred equity holders. As a result, our 4.375% senior notes due 2031 and their guarantees are structurally subordinated to all indebtedness, guarantees and other liabilities of our subsidiaries that do not guarantee our 4.375% senior notes due 2031, including guarantees of other indebtedness of ours, payment obligations under lease agreements, trade payables and preferred equity.
The following tables present summarized financial information for guarantor entities and issuer, on a combined basis after eliminating (i) intercompany transactions and balances among the guarantor entities and (ii) equity in earnings from, and any investments in, any subsidiary that is a non-guarantor:

|  | September 30, 2025 |  | December 31, 2024
Real estate properties, net |  | $ | 2,081,469 |  |  | $ | 2,216,534 |
Other assets, net |  | 321,765 |  |  | 349,634 |
Total assets |  | $ | 2,403,234 |  |  | $ | 2,566,168 |
Indebtedness, net |  | $ | 2,221,568 |  |  | $ | 2,783,826 |
Other liabilities |  | 199,017 |  |  | 219,602 |
Total liabilities |  | $ | 2,420,585 |  |  | $ | 3,003,428 |

|  |  |  | Nine Months Ended September 30, 2025 |  |
Revenues |  |  |  |  |  | $ | 656,309 |  |  |
Expenses |  |  |  |  |  | $ | 853,646 |  |  |
Loss from continuing operations |  |  |  |  |  | $ | (363,993) |  |  |
Net loss |  |  |  |  |  | $ | (355,570) |  |  |

Related Person Transactions
We have relationships and historical and continuing transactions with RMR, RMR Inc., AlerisLife (including Five Star) and others related to them. For further information about these and other such relationships and related person transactions, see Notes 9, 10 and 11 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q, our Annual Report, our definitive Proxy Statement for our 2025 Annual Meeting of Shareholders and our other filings with the SEC. In addition, see the section captioned “Risk Factors” of our Annual Report for a description of risks that may arise as a result of these and other related person transactions and relationships. We may engage in additional transactions with related persons, including businesses to which RMR or its subsidiaries provide management services.
Critical Accounting Estimates
The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect reported amounts. Actual results could differ from those estimates. Significant estimates in our condensed consolidated financial statements include purchase price allocations, useful lives of fixed assets and impairments of real estate and intangible assets.
A discussion of our critical accounting estimates is included in our Annual Report. There have been no significant changes in our critical accounting estimates since the year ended December 31, 2024.
Impact of Government Reimbursement
For the nine months ended September 30, 2025, substantially all of our NOI was generated from properties where a majority of the revenues are derived from our tenants' and residents' private resources, and a small amount of our NOI was generated from properties where a majority of the revenues are derived from Medicare and Medicaid payments. Nonetheless, we own, and our tenants, managers and operators operate, facilities in many states that participate in federal and state healthcare payment programs, including the federal Medicare and state Medicaid programs and other federal and state healthcare payment
47

Table of Contents
programs. Also, some of our medical office and life science property tenants participate in federal Medicare and state Medicaid programs and other government healthcare payment programs.
For more information regarding the government healthcare funding and regulation of our business, please see the section captioned “Business—Government Regulation and Reimbursement” in our Annual Report and the section captioned “Management's Discussion and Analysis of Financial Condition and Results of Operations—Impact of Government Reimbursement” in our Annual Report.
Item 3. Quantitative and Qualitative Disclosures About Market Risk.
We are exposed to risks associated with market changes in interest rates. We manage our exposure to this market risk by monitoring available financing alternatives, including fixed rate debt, and employing derivative instruments, including interest rate caps, to limit our exposure to increasing interest rates. Other than as described below, we do not currently expect any significant changes in our exposure to fluctuations in interest rates or in how we manage this exposure in the near future.
Floating Rate Debt
As of September 30, 2025, our outstanding floating rate debt consisted of the following:

Debt |  | Principal Balance |  | Annual Interest Rate (1) |  | Annual Interest Expense |  | Maturity Date |  | Interest Payments Due
Floating rate mortgage loan |  | $ | 140,000 |  |  | 6.63% |  | $ | 9,411 |  |  | 3/31/2028 |  | Monthly
Floating rate secured revolving credit facility |  | — |  |  | — |  | — |  |  | 6/11/2029 |  | Monthly
|  | $ | 140,000 |  |  |  |  | $ | 9,411 |  |  |  |  |

(1)The annual interest rate is the rate stated in the applicable contract, as adjusted by our interest rate cap, if applicable.
Our $140,000 floating rate mortgage loan is subject to two one-year extension options and requires that interest be paid at an annual rate of SOFR plus a premium of 2.50%. We are vulnerable to changes in the U.S. dollar based on short term interest rates, specifically SOFR. In connection with this mortgage loan, to hedge our exposure to risks related to changes in SOFR and pursuant to the terms of the applicable loan agreement, we have purchased an interest rate cap with a SOFR strike rate equal to 4.50%.
At September 30, 2025, we had no amounts outstanding under our revolving credit facility. No principal repayments are required under our revolving credit facility prior to maturity and repayments may be made and redrawn subject to conditions at any time without penalty.
Borrowings under our revolving credit facility are in U.S. dollars and require interest to be paid at a rate of SOFR plus a premium. Accordingly, we are vulnerable to changes in U.S. dollar based short term interest rates, specifically SOFR. In addition, upon renewal or refinancing of these obligations, we are vulnerable to increases in interest rate premiums, including increases in the cost of replacement interest rate caps, due to market conditions and our perceived credit risk. The following table presents the approximate impact a one percentage point increase in interest rates would have on our annual floating rate interest expense at September 30, 2025, including the impact of our interest rate cap:
48

Table of Contents

|  | Impact of an Increase in Interest Rates
|  |  |  |  |  | Total Interest |  | Annual Earnings
|  | Interest Rate (1) |  | Outstanding Debt |  | Expense Per Year |  | Per Share Impact (2)
As of September 30, 2025 |  | 6.63% |  | $ | 140,000 |  |  | $ | 9,411 |  |  | $ | (0.04) |
One percentage point increase (3) |  | 7.00% |  | $ | 140,000 |  |  | $ | 9,936 |  |  | $ | (0.04) |

(1)Based on SOFR plus a premium, which was 250 basis points per annum for our $140,000 floating rate mortgage loan, as of September 30, 2025.
(2)Based on the diluted weighted average common shares outstanding for the nine months ended September 30, 2025.
(3)A one percentage point increase in interest rates would be capped at 7.00% for our $140,000 floating rate mortgage loan as a result of our 4.50% interest rate cap purchased for this debt. However, a one percentage point increase in the interest rate of our floating rate debt to 7.63% at September 30, 2025 would result in total floating rate interest expense per year of $10,829 and a decrease in annual earnings per share of $0.05.
The following table presents the impact a one percentage point increase in interest rates would have on our annual floating rate interest expense at September 30, 2025 if we were fully drawn on our revolving credit facility:

|  | Impact of an Increase in Interest Rates
|  |  |  |  |  | Total Interest |  | Annual Earnings
|  | Interest Rate (1) |  | Outstanding Debt (2) |  | Expense Per Year |  | Per Share Impact (3)
As of September 30, 2025 |  | 6.74% |  | $ | 290,000 |  |  | $ | 19,817 |  |  | $ | (0.08) |
One percentage point increase (4) |  | 7.46% |  | $ | 290,000 |  |  | $ | 21,934 |  |  | $ | (0.09) |

(1)Based on SOFR plus a premium, which was 250 basis points per annum for both our revolving credit facility and our $140,000 floating rate mortgage loan, as of September 30, 2025. Interest rate is weighted based on amounts outstanding.
(2)Represents the maximum amount available under our revolving credit facility and our $140,000 floating rate mortgage loan.
(3)Based on the diluted weighted average common shares outstanding for the nine months ended September 30, 2025.
(4)A one percentage point increase in interest rates would be capped at 7.00% for our $140,000 floating rate mortgage loan as a result of our 4.50% interest rate cap purchased for this debt. However, a one percentage point increase in the interest rate of our floating rate debt to 7.74% at September 30, 2025 would result in total floating rate interest expense per year of $22,757 and a decrease in annual earnings per share of $0.09.
The foregoing table shows the impact of an immediate one percentage point change in floating interest rates, including the impact of our interest rate cap. Our exposure to fluctuations in floating interest rates will increase or decrease in the future with increases or decreases in the outstanding amounts of any floating rate debt we may incur and the impact, if any, of interest rate caps we may purchase. Generally, if interest rates were to change gradually over time, the impact would be spread over time.
Fixed Rate Debt
As of September 30, 2025, our outstanding fixed rate debt consisted of the following:

|  |  |  | Principal Balance |  | Annual Interest Rate (1) |  | Annual Interest Expense |  | Maturity Date |  | Interest Payments Due
Debt |  |  |  |  |  |
Senior secured notes |  |  |  | $ | 375,000 |  |  | 7.250 | % |  | $ | 27,188 |  |  | 10/15/2030 |  | Semiannually
Senior unsecured notes |  |  |  | 500,000 |  |  | 4.750 | % |  | 23,750 |  |  | 2/15/2028 |  | Semiannually
Senior unsecured notes |  |  |  | 500,000 |  |  | 4.375 | % |  | 21,875 |  |  | 3/1/2031 |  | Semiannually
Senior unsecured notes |  |  |  | 350,000 |  |  | 5.625 | % |  | 19,688 |  |  | 8/1/2042 |  | Quarterly
Senior unsecured notes |  |  |  | 250,000 |  |  | 6.250 | % |  | 15,625 |  |  | 2/1/2046 |  | Quarterly
Mortgage note |  |  |  | 63,757 |  |  | 6.572 | % |  | 4,248 |  |  | 6/7/2030 |  | Monthly
Mortgage note |  |  |  | 120,000 |  |  | 6.864 | % |  | 8,351 |  |  | 6/11/2034 |  | Monthly
Mortgage note |  |  |  | 108,873 |  |  | 6.220 | % |  | 6,866 |  |  | 5/1/2035 |  | Monthly
Mortgage note |  |  |  | 30,284 |  |  | 6.360 | % |  | 1,953 |  |  | 6/1/2035 |  | Monthly
Mortgage note |  |  |  | 6,261 |  |  | 6.444 | % |  | 409 |  |  | 7/1/2043 |  | Monthly
|  |  |  | $ | 2,304,175 |  |  |  |  | $ | 129,953 |  |  |  |  |

(1)The annual interest rate is the rate stated in the applicable contract.
No principal repayments are due under our senior notes until maturity. Our mortgage loan maturing in June 2034 requires monthly interest payments and no principal payment is due until maturity, while our mortgage loans maturing in March 2028, May 2035 and June 2035 require monthly interest payments and no principal payment is due for a specified amount of time.
49

Table of Contents
Our mortgage loans maturing in June 2030 and July 2043 require monthly principal and interest payments. Because these debts require interest to be paid at a fixed rate, changes in market interest rates during the term of these debts will not affect our interest obligations. If these debts were refinanced at interest rates which are one percentage point higher or lower than shown above, our annual interest cost would increase or decrease by approximately $23,042, which amount excludes $334,370 of our senior secured notes due 2026. Our $334,370 senior secured notes due 2026 require no cash interest to accrue prior to maturity and will accrete at a rate of 11.25% per annum compounded semi-annually on January 15 and July 15 of each year, such that the accreted value will equal the principal amount at maturity.
Changes in market interest rates would affect the fair value of our fixed rate debt obligations. Increases in market interest rates decrease the fair value of our fixed rate debt, while decreases in market interest rates increase the fair value of our fixed rate debt. Interest rates continue to remain elevated despite recent reductions by the U.S. Federal Reserve. There are uncertainties surrounding interest rates and they may remain at current levels, decrease or increase.
Our debt agreements contain provisions that allow us to make repayments earlier than the stated maturity date. In some cases, we are not allowed to make early repayment prior to a cutoff date, and we are generally allowed to make prepayments only at a premium equal to a make whole amount, as defined, which is generally designed to preserve a stated yield to the noteholder. In the past, we have repurchased and retired some of our outstanding debt and we may do so again in the future. These prepayment rights and our ability to repurchase and retire outstanding debt may afford us opportunities to mitigate the risk of refinancing our debts at maturity at higher rates by refinancing prior to maturity.
Item 4. Controls and Procedures.
As of the end of the period covered by this Quarterly Report on Form 10-Q, our management carried out an evaluation, under the supervision and with the participation of our President and Chief Executive Officer and our Chief Financial Officer and Treasurer, of the effectiveness of our disclosure controls and procedures pursuant to Rules 13a-15 and 15d-15 under the Securities Exchange Act of 1934, as amended. Based upon that evaluation, our President and Chief Executive Officer and our Chief Financial Officer and Treasurer concluded that our disclosure controls and procedures are effective.
There have been no changes in our internal control over financial reporting during the quarter ended September 30, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
50

Table of Contents
Warning Concerning Forward-Looking Statements
This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and other securities laws that are subject to risks and uncertainties. These statements may include words such as “believe”, “expect”, “anticipate”, “intend”, “plan”, “estimate”, “will”, “may” and negatives or derivatives of these or similar expressions. These forward-looking statements include, among others, statements about: our efforts to manage costs and increase occupancy at our SHOP communities; market demand and supply for healthcare services for older adults and senior living communities; the transitions of management of certain of our senior living communities to third party managers and the expected timing and costs related to such transitions; demand for medical office and life science leased space; our future leasing activity; our leverage; the sufficiency of our liquidity; our liquidity needs and sources; our redemptions of notes; our capital expenditure plans and commitments; our acquisitions and our pending or potential property dispositions; our redevelopment, repositioning and construction activities and plans; and the amount and timing of future distributions.
Forward-looking statements reflect our current expectations, are based on judgments and assumptions, are inherently uncertain and are subject to risks, uncertainties and other factors, which could cause our actual results, performance or achievements to differ materially from expected future results, performance or achievements expressed or implied in those forward-looking statements. Some of the risks, uncertainties and other factors that may cause our actual results, performance or achievements to differ materially from those expressed or implied by forward-looking statements include, but are not limited to, the following:
•The impact of unfavorable market and commercial real estate industry conditions due to possible reduced demand for healthcare related space and senior living communities, uncertainties surrounding interest rates, wage and commodity price inflation, supply chain disruptions, volatility in the public debt and equity markets, effects of or changes to tariffs or trading policies, pandemics, geopolitical instability and tensions, any U.S. government shutdown, economic uncertainties, labor market conditions or changes in real estate utilization, among other things, on us and our managers and other operators and tenants,
•Our senior living operators' abilities to successfully and profitably operate the communities they manage for us,
•The continuing impact of changing market practices on us and our managers and other operators and tenants, such as delayed recovery of the senior housing industry, reduced demand for leased medical office, life science and other space of ours and residencies at senior living communities and increased operating costs,
•The financial strength of our managers and other operators and tenants,
•Whether the aging U.S. population and increasing life spans of seniors will increase the demand for senior living communities and other medical and healthcare related properties and healthcare services,
•The likelihood that we may experience temporary disruption, including reductions in our cash flows, as we transition the management of 116 of our senior living communities managed by Five Star to seven different third party managers,
•Whether our tenants will renew or extend their leases or whether we will obtain replacement tenants on terms as favorable to us as our prior leases,
•The likelihood that our tenants and residents will pay rent or be negatively impacted by continuing unfavorable market and commercial real estate industry conditions,
•Our managers' abilities to increase or maintain rates charged to residents of our senior living communities and manage operating costs for those communities,
•Our ability to increase or maintain occupancy at our properties on terms desirable to us,
•Our ability to increase rents when our leases expire or renew,
•Costs we incur and concessions we grant to lease our properties,
51

Table of Contents
•Risk and uncertainties regarding the costs and timing of development, redevelopment and repositioning activities, including as a result of inflation, cost overruns, tariffs, supply chain challenges, labor shortages, construction delays or inability to obtain necessary permits or volatility in the commercial real estate markets,
•Our ability to manage our capital expenditures and other operating costs effectively and to maintain and enhance our properties and their appeal to tenants and residents,
•Our ability to effectively raise and balance our use of debt and equity capital,
•Our ability to purchase cost effective interest rate caps,
•Our ability to comply with the financial covenants under our debt agreements,
•Our ability to make required payments on our debt,
•Our ability to maintain sufficient liquidity, including the availability of borrowings under our revolving credit facility, and otherwise manage leverage,
•Our credit ratings,
•Our ability to sell properties at prices or returns we target, and the timing of such sales,
•Our ability to sell additional equity interests in, or contribute additional properties to, our existing joint ventures, or enter into additional real estate joint ventures or to attract co-venturers and benefit from our existing joint ventures or any real estate joint ventures we may enter into,
•Our ability to acquire, develop, redevelop or reposition properties that realize our targeted returns,
•Non-performance by the counterparties to our interest rate cap,
•Our ability to pay distributions to our shareholders and to maintain or increase the amount of such distributions,
•The ability of RMR to successfully manage us,
•Competition in the real estate industry, particularly in those markets in which our properties are located,
•Government regulations affecting Medicare and Medicaid reimbursement rates and operational requirements,
•Compliance with, and changes to, federal, state and local laws and regulations, accounting rules, tax laws and similar matters,
•Exposure to litigation and regulatory and government proceedings due to the nature of the senior living and other health and wellness related service businesses,
•Actual and potential conflicts of interest with our related parties, including our Managing Trustees, RMR, ABP Trust, AlerisLife and others affiliated with them,
•Limitations imposed by and our ability to satisfy complex rules to maintain our qualification for taxation as a REIT for U.S. federal income tax purposes,
•Acts of terrorism, outbreaks of pandemics or other public health safety events or conditions, war or other hostilities, global climate change or other manmade or natural disasters beyond our control, and
•Other matters.
These risks, uncertainties and other factors are not exhaustive and should be read in conjunction with other cautionary statements that are included in our periodic filings. The information contained elsewhere in this Quarterly Report on Form 10-Q or in our other filings with the SEC, including under the caption “Risk Factors”, or incorporated herein or therein, identifies
52

Table of Contents
other important factors that could cause differences from our forward-looking statements. Our filings with the SEC are available on the SEC's website at www.sec.gov.
You should not place undue reliance upon our forward-looking statements.
Except as required by law, we do not intend to update or change any forward-looking statements as a result of new information, future events or otherwise.
Statement Concerning Limited Liability
The Amended and Restated Declaration of Trust establishing Diversified Healthcare Trust, dated September 20, 1999, as amended and supplemented, as filed with the State Department of Assessments and Taxation of Maryland, provides that no trustee, officer, shareholder, employee or agent of Diversified Healthcare Trust shall be held to any personal liability, jointly or severally, for any obligation of, or claim against, Diversified Healthcare Trust. All persons dealing with Diversified Healthcare Trust in any way shall look only to the assets of Diversified Healthcare Trust for the payment of any sum or the performance of any obligation.
53

Table of Contents
PART II. Other Information
Item 1A. Risk Factors.
There have been no material changes to risk factors from those we previously disclosed in our Annual Report.
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.
Issuer purchases of equity securities. The following table provides information about our purchases of our equity securities during the three months ended September 30, 2025:

Calendar Month |  | Number of Shares Purchased(1) |  | Average Price Paid per Share |  | Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs |  | Maximum Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs
September 1 - September 30, 2025 |  | 218,290 |  |  | $ | 4.37 |  |  | — |  |  | $ | — |
Total |  | 218,290 |  |  | $ | 4.37 |  |  | — |  |  | $ | — |

(1)These common share withholdings and purchases were made to satisfy tax withholding and payment obligations of our officers and certain other current and former officers and employees of RMR and certain employees of AlerisLife in connection with the vesting of awards of our common shares. We withheld and purchased these common shares at their fair market values based upon the trading prices of our common shares at the close of trading on Nasdaq on the applicable purchase dates.
Item 6. Exhibits.

Exhibit Number |  | Description
3.1 |  | Composite Copy of Articles of Amendment and Restatement, dated September 20, 1999, as amended to date. (Incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2020.)
3.2 |  | Articles Supplementary, dated May 11, 2000. (Incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2000.)
3.3 |  | Articles Supplementary, dated June 30, 2017. (Incorporated by reference to the Company's Current Report on Form 8-K filed on June 30, 2017.)
3.4 |  | Articles Supplementary, dated May 19, 2020. (Incorporated by reference to the Company's Current Report on Form 8-K filed on May 20, 2020.)
3.5 |  | Fourth Amended and Restated Bylaws of the Company, adopted May 31, 2024. (Incorporated by reference to the Company’s Current Report on Form 8-K filed on June 4, 2024.)
4.1 |  | Form of Common Share Certificate. (Incorporated by reference to the Company's Current Report on Form 8-K filed on January 2, 2020.)
4.2 |  | Indenture, dated as of December 20, 2001, between the Company and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association, as successor trustee to State Street Bank and Trust Company). (Incorporated by reference to the Company's Registration Statement on Form S-3, File No. 333-76588.)
4.3 |  | Supplemental Indenture No. 7, dated as of July 20, 2012, between the Company and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), related to 5.625% Senior Notes due 2042, including form thereof. (Incorporated by reference to the Company's Registration Statement on Form 8-A filed on July 20, 2012.)
4.4 |  | Indenture, dated as of February 18, 2016, between the Company and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association). (Incorporated by reference to the Company's Current Report on Form 8-K filed on February 18, 2016.)
4.5 |  | First Supplemental Indenture, dated as of February 18, 2016, between the Company and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), related to 6.25% Senior Notes due 2046, including form thereof. (Incorporated by reference to the Company's Current Report on Form 8-K filed on February 18, 2016.)

54

Table of Contents

4.6 |  | Second Supplemental Indenture, dated as of February 12, 2018, between the Company and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), related to 4.75% Senior Notes due 2028, including form thereof. (Incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2017.)
4.7 |  | Fourth Supplemental Indenture, dated as of February 8, 2021, among the Company, certain subsidiaries of the Company named therein as guarantors and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), related to 4.375% Senior Notes due 2031, including form thereof. (Incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2020.)
4.8 |  | Supplemental Indenture, dated as of March 5, 2021, among the Company, certain subsidiaries of the Company named therein as guarantors and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), related to 4.375% Senior Notes due 2031. (Incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2021.)
4.9 |  | Supplemental Indenture, dated as of September 9, 2022, among the Company, certain subsidiaries of the Company named therein as guarantors and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), related to 4.375% Senior Notes due 2031. (Incorporated by reference to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2022.)
4.10 |  | Supplemental Indenture, dated as of November 22, 2022, among the Company, certain subsidiaries of the Company named therein as guarantors and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), related to 4.375% Senior Notes due 2031. (Incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2022.)
4.11 |  | Supplemental Indenture, dated as of March 1, 2024, among the Company, certain subsidiaries of the Company named therein as guarantors and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), related to 4.375% Senior Notes due 2031. (Incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2024.)
4.12 |  | Indenture, dated as of December 21, 2023, among the Company, certain subsidiaries of the Company named therein as guarantors and U.S. Bank Trust Company, National Association, related to Senior Secured Notes due 2026. (Incorporated by reference to the Company's Current Report on Form 8-K filed on December 22, 2023.)
4.13 |  | Indenture, dated as of September 26, 2025, between the Company, certain subsidiaries of the Company named therein as guarantors and U.S. Bank Trust Company, National Association, related to the Company’s 7.250% Senior Secured Notes due 2030. (Incorporated by reference to the Company’s Form 8-K filed on September 29, 2025.)
4.14 |  | Registration Rights and Lock-Up Agreement, dated as of June 5, 2015, among the Company, ABP Trust (f/k/a Reit Management & Research Trust) and Adam D. Portnoy. (Incorporated by reference to the Company's Current Report on Form 8-K filed on June 8, 2015.)
10.1 |  | Release of Certain Guarantors, dated as of September 26, 2025, related to Senior Secured Notes due 2026, among the Company, certain subsidiaries of the Company named therein and U.S. Bank Trust Company, National Association. (Filed herewith.)
22.1 |  | List of Subsidiary Guarantors. (Incorporated by reference to t h e Company's Quarter ly Report on Form 10-Q for the quarter ended June 30, 2025.)
31.1 |  | Rule 13a-14(a) Certification. (Filed herewith.)
31.2 |  | Rule 13a-14(a) Certification. (Filed herewith.)
32.1 |  | Section 1350 Certification. (Furnished herewith.)
101.INS |  | XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH |  | XBRL Taxonomy Extension Schema Document. (Filed herewith.)
101.CAL |  | XBRL Taxonomy Extension Calculation Linkbase Document. (Filed herewith.)
101.DEF |  | XBRL Taxonomy Extension Definition Linkbase Document. (Filed herewith.)
101.LAB |  | XBRL Taxonomy Extension Label Linkbase Document. (Filed herewith.)
101.PRE |  | XBRL Taxonomy Extension Presentation Linkbase Document. (Filed herewith.)
104 |  | Cover Page Interactive Data File. (Formatted as Inline XBRL and contained in Exhibit 101.)

55

Table of Contents
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

| DIVERSIFIED HEALTHCARE TRUST
| By: | /s/ Christopher J. Bilotto
|  | Christopher J. Bilotto
|  | President and Chief Executive Officer
Dated: November 3, 2025 |
| By: | /s/ Matthew C. Brown
|  | Matthew C. Brown
|  | Chief Financial Officer and Treasurer
|  | (principal financial and accounting officer)
Dated: November 3, 2025 |

56