0000811156 2025 Q3 FALSE--12-31 0000201533 http://fasb.org/us-gaap/2025#AccountsPayableCurrent xbrli:shares iso4217:USD iso4217:USD xbrli:shares xbrli:pure cms:facility utr:MW 0000811156 2025-01-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember 2025-01-01 2025-09-30 0000811156 us-gaap:CommonStockMember 2025-01-01 2025-09-30 0000811156 cms:A5.625JuniorSubordinatedNotesDue2078Member 2025-01-01 2025-09-30 0000811156 cms:A5.875JuniorSubordinatedNotesDue2078Member 2025-01-01 2025-09-30 0000811156 cms:A5.875JuniorSubordinatedNotesDue2079Member 2025-01-01 2025-09-30 0000811156 cms:SeriesCPreferredStockDepositarySharesMember 2025-01-01 2025-09-30 0000811156 us-gaap:CumulativePreferredStockMember 2025-01-01 2025-09-30 0000811156 2025-10-13 0000811156 cms:ConsumersEnergyCompanyMember 2025-10-13 0000811156 2025-07-01 2025-09-30 0000811156 2024-07-01 2024-09-30 0000811156 2024-01-01 2024-09-30 0000811156 us-gaap:ElectricityPurchasedMember 2025-07-01 2025-09-30 0000811156 us-gaap:ElectricityPurchasedMember 2024-07-01 2024-09-30 0000811156 us-gaap:ElectricityPurchasedMember 2025-01-01 2025-09-30 0000811156 us-gaap:ElectricityPurchasedMember 2024-01-01 2024-09-30 0000811156 us-gaap:OilAndGasPurchasedMember 2025-07-01 2025-09-30 0000811156 us-gaap:OilAndGasPurchasedMember 2024-07-01 2024-09-30 0000811156 us-gaap:OilAndGasPurchasedMember 2025-01-01 2025-09-30 0000811156 us-gaap:OilAndGasPurchasedMember 2024-01-01 2024-09-30 0000811156 us-gaap:RelatedPartyMember 2025-07-01 2025-09-30 0000811156 us-gaap:RelatedPartyMember 2024-07-01 2024-09-30 0000811156 us-gaap:RelatedPartyMember 2025-01-01 2025-09-30 0000811156 us-gaap:RelatedPartyMember 2024-01-01 2024-09-30 0000811156 us-gaap:NonrelatedPartyMember 2025-07-01 2025-09-30 0000811156 us-gaap:NonrelatedPartyMember 2024-07-01 2024-09-30 0000811156 us-gaap:NonrelatedPartyMember 2025-01-01 2025-09-30 0000811156 us-gaap:NonrelatedPartyMember 2024-01-01 2024-09-30 0000811156 2024-12-31 0000811156 2023-12-31 0000811156 2025-09-30 0000811156 2024-09-30 0000811156 us-gaap:NonrelatedPartyMember 2025-09-30 0000811156 us-gaap:NonrelatedPartyMember 2024-12-31 0000811156 us-gaap:RelatedPartyMember 2025-09-30 0000811156 us-gaap:RelatedPartyMember 2024-12-31 0000811156 2025-06-30 0000811156 2024-06-30 0000811156 us-gaap:CommonStockMember 2025-06-30 0000811156 us-gaap:CommonStockMember 2025-09-30 0000811156 us-gaap:CommonStockMember 2024-06-30 0000811156 us-gaap:CommonStockMember 2024-09-30 0000811156 us-gaap:CommonStockMember 2024-12-31 0000811156 us-gaap:CommonStockMember 2023-12-31 0000811156 us-gaap:AdditionalPaidInCapitalMember 2025-06-30 0000811156 us-gaap:AdditionalPaidInCapitalMember 2024-06-30 0000811156 us-gaap:AdditionalPaidInCapitalMember 2024-12-31 0000811156 us-gaap:AdditionalPaidInCapitalMember 2023-12-31 0000811156 us-gaap:AdditionalPaidInCapitalMember 2025-07-01 2025-09-30 0000811156 us-gaap:AdditionalPaidInCapitalMember 2024-07-01 2024-09-30 0000811156 us-gaap:AdditionalPaidInCapitalMember 2025-01-01 2025-09-30 0000811156 us-gaap:AdditionalPaidInCapitalMember 2024-01-01 2024-09-30 0000811156 us-gaap:AdditionalPaidInCapitalMember 2025-09-30 0000811156 us-gaap:AdditionalPaidInCapitalMember 2024-09-30 0000811156 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-06-30 0000811156 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-06-30 0000811156 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-12-31 0000811156 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2023-12-31 0000811156 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-07-01 2025-09-30 0000811156 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-07-01 2024-09-30 0000811156 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-01-01 2025-09-30 0000811156 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-01-01 2024-09-30 0000811156 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-09-30 0000811156 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-09-30 0000811156 us-gaap:RetainedEarningsMember 2025-06-30 0000811156 us-gaap:RetainedEarningsMember 2024-06-30 0000811156 us-gaap:RetainedEarningsMember 2024-12-31 0000811156 us-gaap:RetainedEarningsMember 2023-12-31 0000811156 us-gaap:RetainedEarningsMember 2025-07-01 2025-09-30 0000811156 us-gaap:RetainedEarningsMember 2024-07-01 2024-09-30 0000811156 us-gaap:RetainedEarningsMember 2025-01-01 2025-09-30 0000811156 us-gaap:RetainedEarningsMember 2024-01-01 2024-09-30 0000811156 us-gaap:RetainedEarningsMember 2025-09-30 0000811156 us-gaap:RetainedEarningsMember 2024-09-30 0000811156 us-gaap:PreferredStockMember 2025-09-30 0000811156 us-gaap:PreferredStockMember 2025-06-30 0000811156 us-gaap:PreferredStockMember 2024-06-30 0000811156 us-gaap:PreferredStockMember 2024-09-30 0000811156 us-gaap:PreferredStockMember 2024-12-31 0000811156 us-gaap:PreferredStockMember 2023-12-31 0000811156 us-gaap:NoncontrollingInterestMember 2025-06-30 0000811156 us-gaap:NoncontrollingInterestMember 2024-06-30 0000811156 us-gaap:NoncontrollingInterestMember 2024-12-31 0000811156 us-gaap:NoncontrollingInterestMember 2023-12-31 0000811156 us-gaap:NoncontrollingInterestMember 2025-07-01 2025-09-30 0000811156 us-gaap:NoncontrollingInterestMember 2024-07-01 2024-09-30 0000811156 us-gaap:NoncontrollingInterestMember 2025-01-01 2025-09-30 0000811156 us-gaap:NoncontrollingInterestMember 2024-01-01 2024-09-30 0000811156 us-gaap:NoncontrollingInterestMember 2025-09-30 0000811156 us-gaap:NoncontrollingInterestMember 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember 2025-07-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember 2024-07-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember 2024-01-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RelatedPartyMember 2025-07-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RelatedPartyMember 2024-07-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RelatedPartyMember 2025-01-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RelatedPartyMember 2024-01-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:NonrelatedPartyMember 2025-07-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:NonrelatedPartyMember 2024-07-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:NonrelatedPartyMember 2025-01-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:NonrelatedPartyMember 2024-01-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 cms:ConsumersEnergyCompanyMember 2023-12-31 0000811156 cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:NonrelatedPartyMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:NonrelatedPartyMember 2024-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RelatedPartyMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RelatedPartyMember 2024-12-31 0000811156 cms:ConsumersEnergyCompanyMember 2025-06-30 0000811156 cms:ConsumersEnergyCompanyMember 2024-06-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:CommonStockMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:CommonStockMember 2025-06-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:CommonStockMember 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:CommonStockMember 2024-06-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:CommonStockMember 2024-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:CommonStockMember 2023-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AdditionalPaidInCapitalMember 2025-06-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AdditionalPaidInCapitalMember 2024-06-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AdditionalPaidInCapitalMember 2024-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AdditionalPaidInCapitalMember 2023-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AdditionalPaidInCapitalMember 2025-07-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AdditionalPaidInCapitalMember 2024-07-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AdditionalPaidInCapitalMember 2025-01-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AdditionalPaidInCapitalMember 2024-01-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AdditionalPaidInCapitalMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AdditionalPaidInCapitalMember 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-06-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-06-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2023-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-07-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-07-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-01-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-01-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RetainedEarningsMember 2025-06-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RetainedEarningsMember 2024-06-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RetainedEarningsMember 2024-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RetainedEarningsMember 2023-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RetainedEarningsMember 2025-07-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RetainedEarningsMember 2024-07-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RetainedEarningsMember 2025-01-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RetainedEarningsMember 2024-01-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RetainedEarningsMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:RetainedEarningsMember 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:PreferredStockMember 2025-06-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:PreferredStockMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:PreferredStockMember 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:PreferredStockMember 2024-06-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:PreferredStockMember 2024-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:PreferredStockMember 2023-12-31 0000811156 cms:ConsumersEnergyCompanyMember cms:ElectricRateCaseMember 2024-05-01 2024-05-31 0000811156 cms:ConsumersEnergyCompanyMember cms:ElectricRateCaseFirstComponentMember 2024-05-01 2024-05-31 0000811156 cms:ConsumersEnergyCompanyMember cms:ElectricRateCaseSecondComponentMember 2024-05-01 2024-05-31 0000811156 cms:ElectricRateCaseMember 2024-10-01 2024-10-31 0000811156 cms:ConsumersEnergyCompanyMember cms:ElectricRateCaseMember 2025-03-01 2025-03-31 0000811156 cms:ConsumersEnergyCompanyMember cms:JHCampbellGeneratingUnitsMember 2025-05-23 2025-08-20 0000811156 cms:ConsumersEnergyCompanyMember cms:JHCampbellGeneratingUnitsMember 2025-08-21 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:ServiceRestorationCostDeferralApplicationMember 2025-09-30 0000811156 cms:BayHarborMember 2025-09-30 0000811156 cms:NrepaMember cms:ElectricUtilityMember srt:MinimumMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 cms:NrepaMember cms:ElectricUtilityMember srt:MaximumMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 cms:NrepaMember cms:ElectricUtilityMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 cms:CerclaLiabilityMember srt:MinimumMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 cms:CerclaLiabilityMember srt:MaximumMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:CerclaLiabilityMember 2025-09-30 0000811156 cms:LudingtonPlantOverhaulContractDisputeMember cms:ConsumersEnergyCompanyMember 2022-01-01 2022-12-31 0000811156 cms:ConsumersEnergyCompanyMember cms:LudingtonMember 2025-09-30 0000811156 cms:LudingtonPlantOverhaulContractDisputeMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:ManufacturedGasPlantMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:ManufacturedGasPlantMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:ManufacturedGasPlantMember 2025-09-30 0000811156 cms:IndemnificationAgreementFromSaleOfMembershipInterestsInVIEsMember 2025-09-30 0000811156 us-gaap:IndemnificationGuaranteeMember 2025-09-30 0000811156 us-gaap:GuaranteeTypeOtherMember 2025-09-30 0000811156 us-gaap:GuaranteeTypeOtherMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 cms:AviatorWindEquityHoldingsMember us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2025-09-30 0000811156 srt:ParentCompanyMember cms:A6.500JuniorSubordinatedNotesDueJune2055Member us-gaap:JuniorSubordinatedDebtMember 2025-09-30 0000811156 srt:ParentCompanyMember cms:TermLoanFacilityDueDecember2025Member cms:TermLoanFacilityMember 2025-09-30 0000811156 srt:ParentCompanyMember 2025-09-30 0000811156 cms:NorthStarCleanEnergyIncludingSubsidiariesMember cms:ConstructionFinancingAgreementMember us-gaap:ConstructionLoansMember 2025-09-30 0000811156 cms:NorthStarCleanEnergyIncludingSubsidiariesMember 2025-09-30 0000811156 cms:A4.500FirstMortgageBondsDueJune2031Member cms:ConsumersEnergyCompanyMember cms:FirstMortgageBondsMember 2025-09-30 0000811156 cms:A5.050FirstMortgageBondsDueMay2035Member cms:ConsumersEnergyCompanyMember cms:FirstMortgageBondsMember 2025-09-30 0000811156 srt:ParentCompanyMember cms:A6.500JuniorSubordinatedNotesDueJune2055Member srt:ScenarioForecastMember us-gaap:JuniorSubordinatedDebtMember 2035-06-01 2035-06-01 0000811156 cms:NorthStarCleanEnergyIncludingSubsidiariesMember cms:ConstructionFinancingAgreementMember srt:ScenarioForecastMember us-gaap:ConstructionLoansMember 2026-01-01 2026-06-30 0000811156 srt:ParentCompanyMember cms:TermLoanFacilityDueSeptember2025Member cms:TermLoanFacilityMember 2025-01-01 2025-09-30 0000811156 srt:ParentCompanyMember cms:TermLoanFacilityDueDecember2025Member cms:TermLoanFacilityMember 2025-01-01 2025-09-30 0000811156 srt:ParentCompanyMember 2025-01-01 2025-09-30 0000811156 cms:FirstMortgageBondsMember us-gaap:RelatedPartyMember 2025-01-01 2025-09-30 0000811156 cms:FirstMortgageBondsMember 2025-01-01 2025-09-30 0000811156 cms:RepurchasedDebtMember cms:ConsumersEnergyCompanyMember cms:FirstMortgageBondsMember 2025-07-01 2025-09-30 0000811156 cms:RepurchasedDebtMember cms:ConsumersEnergyCompanyMember cms:FirstMortgageBondsMember 2025-01-01 2025-09-30 0000811156 cms:FirstMortgageBondsMember us-gaap:RelatedPartyMember 2024-07-01 2024-09-30 0000811156 cms:FirstMortgageBondsMember us-gaap:RelatedPartyMember 2024-01-01 2024-09-30 0000811156 cms:FirstMortgageBondsMember 2024-07-01 2024-09-30 0000811156 cms:FirstMortgageBondsMember 2024-01-01 2024-09-30 0000811156 cms:RepurchasedDebtMember cms:ConsumersEnergyCompanyMember cms:FirstMortgageBondsMember 2024-07-01 2024-09-30 0000811156 cms:RepurchasedDebtMember cms:ConsumersEnergyCompanyMember cms:FirstMortgageBondsMember 2024-01-01 2024-09-30 0000811156 cms:RevolvingCreditFacilitiesTwoMember srt:ParentCompanyMember 2025-09-30 0000811156 cms:RevolvingCreditFacilitiesSevenMember srt:ParentCompanyMember 2025-09-30 0000811156 cms:RevolvingCreditFacilitiesFourMember cms:NorthStarCleanEnergyIncludingSubsidiariesMember 2025-09-30 0000811156 cms:RevolvingCreditFacilitiesSixMember cms:NorthStarCleanEnergyIncludingSubsidiariesMember 2025-09-30 0000811156 cms:RevolvingCreditFacilitiesThreeMember cms:NorthStarCleanEnergyIncludingSubsidiariesMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:RevolvingCreditFacilitiesFiveMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:RevolvingCreditFacilitiesOneMember 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:RevolvingCreditFacilitiesEightMember 2025-09-30 0000811156 cms:RevolvingCreditFacilitiesTwoMember srt:ParentCompanyMember us-gaap:LetterOfCreditMember 2025-01-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:LetterOfCreditMember 2025-01-01 2025-09-30 0000811156 us-gaap:CommercialPaperMember cms:ConsumersEnergyCompanyMember 2025-01-01 2025-09-30 0000811156 us-gaap:CommercialPaperMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:LineOfCreditMember us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:LineOfCreditMember us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-01 2024-12-31 0000811156 us-gaap:LineOfCreditMember us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 cms:NorthStarCleanEnergyMember 2025-01-01 2025-09-30 0000811156 cms:NorthStarCleanEnergyMember 2025-09-30 0000811156 cms:NorthStarCleanEnergysSupplierFinancingProgramMember cms:NorthStarCleanEnergyMember 2025-09-30 0000811156 2023-01-01 2023-12-31 0000811156 cms:SettlementOfForwardContractsMember 2025-07-01 2025-09-30 0000811156 cms:SettlementOfForwardContractsMember 2025-09-30 0000811156 cms:SettlementOfForwardContractsMember us-gaap:SubsequentEventMember 2025-10-01 2025-10-30 0000811156 cms:SettlementOfForwardContractsMember us-gaap:SubsequentEventMember 2025-10-30 0000811156 us-gaap:FairValueInputsLevel1Member 2025-09-30 0000811156 us-gaap:FairValueInputsLevel1Member 2024-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0000811156 cms:FairValueInputsLevel2AndLevel3Member 2025-09-30 0000811156 cms:FairValueInputsLevel2AndLevel3Member 2024-12-31 0000811156 cms:ConsumersEnergyCompanyMember cms:FairValueInputsLevel2AndLevel3Member 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:FairValueInputsLevel2AndLevel3Member 2024-12-31 0000811156 us-gaap:FairValueInputsLevel12And3Member 2025-09-30 0000811156 us-gaap:FairValueInputsLevel12And3Member 2024-12-31 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:FairValueInputsLevel12And3Member 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:FairValueInputsLevel12And3Member 2024-12-31 0000811156 us-gaap:InterestRateSwapMember us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0000811156 us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-07-01 2025-09-30 0000811156 us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-01-01 2025-09-30 0000811156 us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember 2025-09-30 0000811156 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0000811156 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0000811156 us-gaap:CarryingReportedAmountFairValueDisclosureMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel1Member cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel2Member cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:CarryingReportedAmountFairValueDisclosureMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel1Member cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel2Member cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:NonrelatedPartyMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:NonrelatedPartyMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel1Member us-gaap:NonrelatedPartyMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel2Member us-gaap:NonrelatedPartyMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member us-gaap:NonrelatedPartyMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:NonrelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:NonrelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel1Member us-gaap:NonrelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel2Member us-gaap:NonrelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member us-gaap:NonrelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel1Member us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel2Member us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:CarryingReportedAmountFairValueDisclosureMember us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel1Member us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel2Member us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 us-gaap:EstimateOfFairValueFairValueDisclosureMember us-gaap:FairValueInputsLevel3Member us-gaap:RelatedPartyMember cms:ConsumersEnergyCompanyMember 2024-12-31 0000811156 cms:CMSEnergyNotePayableMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 cms:PensionAndDBSERPMember 2025-07-01 2025-09-30 0000811156 cms:PensionAndDBSERPMember 2024-07-01 2024-09-30 0000811156 cms:PensionAndDBSERPMember 2025-01-01 2025-09-30 0000811156 cms:PensionAndDBSERPMember 2024-01-01 2024-09-30 0000811156 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2025-07-01 2025-09-30 0000811156 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2024-07-01 2024-09-30 0000811156 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2025-01-01 2025-09-30 0000811156 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2024-01-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:PensionAndDBSERPMember 2025-07-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:PensionAndDBSERPMember 2024-07-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:PensionAndDBSERPMember 2025-01-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember cms:PensionAndDBSERPMember 2024-01-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2025-07-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2024-07-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2025-01-01 2025-09-30 0000811156 cms:ConsumersEnergyCompanyMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2024-01-01 2024-09-30 0000811156 cms:VolatilityMechanismMember us-gaap:PensionPlansDefinedBenefitMember 2025-01-01 2025-09-30 0000811156 cms:VolatilityMechanismMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2025-01-01 2025-09-30 0000811156 cms:VolatilityMechanismMember us-gaap:PensionPlansDefinedBenefitMember 2024-01-01 2024-09-30 0000811156 cms:VolatilityMechanismMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2024-01-01 2024-09-30 0000811156 cms:ConsumersEnergyCompanyMember 2025-06-01 2025-06-30 0000811156 cms:ConsumersEnergyCompanyMember cms:TaxYear2018And2019Member 2024-09-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:NorthStarCleanEnergyMember 2025-07-01 2025-09-30 0000811156 cms:OtherUtilityServiceMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ElectricUtilityMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:GasUtilityMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:NorthStarCleanEnergyMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2025-07-01 2025-09-30 0000811156 cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2025-07-01 2025-09-30 0000811156 cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2025-07-01 2025-09-30 0000811156 cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2025-07-01 2025-09-30 0000811156 cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:NorthStarCleanEnergyMember 2024-07-01 2024-09-30 0000811156 cms:OtherUtilityServiceMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ElectricUtilityMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:GasUtilityMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:NorthStarCleanEnergyMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2024-07-01 2024-09-30 0000811156 cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2024-07-01 2024-09-30 0000811156 cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2024-07-01 2024-09-30 0000811156 cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2024-07-01 2024-09-30 0000811156 cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:NorthStarCleanEnergyMember 2025-01-01 2025-09-30 0000811156 cms:OtherUtilityServiceMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ElectricUtilityMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:GasUtilityMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:NorthStarCleanEnergyMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2025-01-01 2025-09-30 0000811156 cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2025-01-01 2025-09-30 0000811156 cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2025-01-01 2025-09-30 0000811156 cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2025-01-01 2025-09-30 0000811156 cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:PowerSalesAgreementMember cms:NorthStarCleanEnergyMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:NorthStarCleanEnergyMember 2024-01-01 2024-09-30 0000811156 cms:OtherUtilityServiceMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ElectricUtilityMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:GasUtilityMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:NorthStarCleanEnergyMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2024-01-01 2024-09-30 0000811156 cms:ResidentialUtilityServicesMember cms:ConsumersEnergyCompanyMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2024-01-01 2024-09-30 0000811156 cms:CommercialUtilityServiceMember cms:ConsumersEnergyCompanyMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2024-01-01 2024-09-30 0000811156 cms:IndustrialUtilityServiceMember cms:ConsumersEnergyCompanyMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2024-01-01 2024-09-30 0000811156 cms:OtherUtilityServiceMember cms:ConsumersEnergyCompanyMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:PowerSalesAgreementMember cms:NorthStarCleanEnergyMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember 2025-07-01 2025-09-30 0000811156 us-gaap:CorporateNonSegmentMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:ElectricUtilityMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:GasUtilityMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:NorthStarCleanEnergyMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember 2025-07-01 2025-09-30 0000811156 us-gaap:CorporateNonSegmentMember us-gaap:OilAndGasPurchasedMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ElectricUtilityMember 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:GasUtilityMember 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:NorthStarCleanEnergyMember 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember 2025-09-30 0000811156 us-gaap:CorporateNonSegmentMember 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember 2025-07-01 2025-09-30 0000811156 us-gaap:CorporateNonSegmentMember cms:ConsumersEnergyCompanyMember 2025-07-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:CorporateNonSegmentMember cms:ConsumersEnergyCompanyMember 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember 2024-07-01 2024-09-30 0000811156 us-gaap:CorporateNonSegmentMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:ElectricUtilityMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:GasUtilityMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:NorthStarCleanEnergyMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember 2024-07-01 2024-09-30 0000811156 us-gaap:CorporateNonSegmentMember us-gaap:OilAndGasPurchasedMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ElectricUtilityMember 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:GasUtilityMember 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:NorthStarCleanEnergyMember 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember 2024-09-30 0000811156 us-gaap:CorporateNonSegmentMember 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember 2024-07-01 2024-09-30 0000811156 us-gaap:CorporateNonSegmentMember cms:ConsumersEnergyCompanyMember 2024-07-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:ElectricUtilityMember 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember cms:GasUtilityMember 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember 2024-09-30 0000811156 us-gaap:CorporateNonSegmentMember cms:ConsumersEnergyCompanyMember 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember 2025-01-01 2025-09-30 0000811156 us-gaap:CorporateNonSegmentMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:ElectricUtilityMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:GasUtilityMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:NorthStarCleanEnergyMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember 2025-01-01 2025-09-30 0000811156 us-gaap:CorporateNonSegmentMember us-gaap:OilAndGasPurchasedMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember 2025-01-01 2025-09-30 0000811156 us-gaap:CorporateNonSegmentMember cms:ConsumersEnergyCompanyMember 2025-01-01 2025-09-30 0000811156 us-gaap:OperatingSegmentsMember 2024-01-01 2024-09-30 0000811156 us-gaap:CorporateNonSegmentMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:ElectricUtilityMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:GasUtilityMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember cms:NorthStarCleanEnergyMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember us-gaap:OilAndGasPurchasedMember 2024-01-01 2024-09-30 0000811156 us-gaap:CorporateNonSegmentMember us-gaap:OilAndGasPurchasedMember 2024-01-01 2024-09-30 0000811156 us-gaap:OperatingSegmentsMember cms:ConsumersEnergyCompanyMember 2024-01-01 2024-09-30 0000811156 us-gaap:CorporateNonSegmentMember cms:ConsumersEnergyCompanyMember 2024-01-01 2024-09-30 0000811156 cms:NWOWindEquityHoldingsMember us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2025-03-01 2025-03-31 0000811156 cms:NWOWindEquityHoldingsMember 2025-03-01 2025-03-31 0000811156 cms:NWOHoldcoMember us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2025-03-01 2025-03-31 0000811156 cms:DeltaSolarEquityHoldingsMember us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2025-03-01 2025-03-31 0000811156 cms:DeltaSolarEquityHoldingsMember 2025-03-01 2025-03-31 0000811156 cms:AviatorWindEquityHoldingsMember us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2025-01-01 2025-09-30 0000811156 cms:AviatorWindMember us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2025-01-01 2025-09-30 0000811156 cms:NewportSolarHoldingsMember us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2025-01-01 2025-09-30 0000811156 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2025-09-30 0000811156 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2024-12-31 0000811156 cms:SecuritizationBondsMember 2025-09-30 0000811156 cms:SecuritizationBondsMember 2024-12-31 0000811156 cms:GraylingMember us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2025-01-01 2025-09-30 0000811156 cms:GeneseeMember us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2025-01-01 2025-09-30 0000811156 cms:TESFilerCityMember us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2025-01-01 2025-09-30 0000811156 cms:CravenMember us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2025-01-01 2025-09-30 0000811156 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2025-09-30 0000811156 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2024-12-31 0000811156 cms:RetentionBenefitsMember cms:JHCampbellGeneratingUnitsMember 2025-09-30 0000811156 cms:RetentionBenefitsMember cms:RetentionIncentiveProgramMember cms:JHCampbellGeneratingUnitsMember 2025-09-30 0000811156 cms:RetentionBenefitsMember cms:RetentionIncentiveProgramMember cms:DEKarnGeneratingComplexAndJHCampbellGeneratingUnitsMember 2025-09-30 0000811156 cms:RetentionBenefitsMember 2024-12-31 0000811156 cms:RetentionBenefitsMember 2023-12-31 0000811156 cms:RetentionBenefitsMember 2025-01-01 2025-09-30 0000811156 cms:RetentionBenefitsMember 2024-01-01 2024-09-30 0000811156 cms:RetentionBenefitsMember 2025-09-30 0000811156 cms:RetentionBenefitsMember 2024-09-30 0000811156 cms:RetentionBenefitsMember 2025-07-01 2025-09-30 0000811156 cms:RetentionBenefitsMember 2024-07-01 2024-09-30 0000811156 2025-09-01 2025-09-30 0000811156 srt:MinimumMember 2025-09-01 2025-09-30 0000811156 srt:MaximumMember 2025-09-01 2025-09-30
Table of Contents

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q
x 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
For the transition period from _____to_____

Commission File No. |  | Registrant; State of Incorporation; Address; and Telephone Number |  | IRS Employer Identification No.
1-9513 |  | CMS ENERGY CORPORATION |  |  | 38-2726431
| (A Michigan Corporation) One Energy Plaza, Jackson, Michigan 49201 (517) 788-0550 |

1-5611 |  | CONSUMERS ENERGY COMPANY |  |  | 38-0442310
| (A Michigan Corporation) One Energy Plaza, Jackson, Michigan 49201 (517) 788-0550 |

Securities registered pursuant to Section 12(b) of the Act:
Title of each class |  | Trading Symbol(s) |  | Name of each exchange on which registered
CMS Energy Corporation Common Stock, $0.01 par value |  | CMS |  | New York Stock Exchange
CMS Energy Corporation 5.625% Junior Subordinated Notes due 2078 |  | CMSA |  | New York Stock Exchange
CMS Energy Corporation 5.875% Junior Subordinated Notes due 2078 |  | CMSC |  | New York Stock Exchange
CMS Energy Corporation 5.875% Junior Subordinated Notes due 2079 |  | CMSD |  | New York Stock Exchange
CMS Energy Corporation Depositary Shares, each representing a 1/1,000th interest in a share of 4.200% Cumulative Redeemable Perpetual Preferred Stock, Series C |  | CMS PRC |  | New York Stock Exchange
Consumers Energy Company Cumulative Preferred Stock, $100 par value: $4.50 Series |  | CMS-PB |  | New York Stock Exchange

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.
CMS Energy Corporation: | Yes | ☒ | No | ☐ |  | Consumers Energy Company: | 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).
CMS Energy Corporation: | Yes | ☒ | No | ☐ |  | Consumers Energy Company: | 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.
CMS Energy Corporation: |  |  |  |  |  | Consumers Energy Company: |  |  |  |  |
Large accelerated filer |  | ☒ |  |  |  | Large accelerated filer |  | ☐ |  |  |
Non‑accelerated filer |  | ☐ |  |  |  | Non‑accelerated filer |  | ☒ |  |  |
Accelerated filer |  | ☐ |  |  |  | Accelerated filer |  | ☐ |  |  |
Smaller reporting company |  | ☐ |  |  |  | Smaller reporting company |  | ☐ |  |  |
Emerging growth 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.
CMS Energy Corporation: |  | ☐ |  |  |  | Consumers Energy Company: |  | ☐ |  |  |

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b‑2 of the Exchange Act).
CMS Energy Corporation: | Yes | ☐ | No | ☒ |  | Consumers Energy Company: | Yes | ☐ | No | ☒ |

Indicate the number of shares outstanding of each of the issuer’s classes of common stock at October 13, 2025:
CMS Energy Corporation: |  |
CMS Energy Corporation Common Stock, $0.01 par value | 304,319,765 |
Consumers Energy Company: |  |
Consumers Common Stock, $10 par value, privately held by CMS Energy Corporation | 84,108,789 |

Table of Contents

Table of Contents
CMS Energy Corporation
Consumers Energy Company
Quarterly Reports on Form 10‑Q to the Securities and Exchange Commission for the Period Ended September 30, 2025
Table of Contents

Glossary | 2
Filing Format | 10
Available Information | 10
Forward-looking Statements and Information | 10
Part I—Financial Information | 15
Item 1. | Financial Statements | 15
Item 2. | Management’s Discussion and Analysis of Financial Condition and Results of Operations | 95
Item 3. | Quantitative and Qualitative Disclosures About Market Risk | 95
Item 4. | Controls and Procedures | 96
Part II—Other Information | 96
Item 1. | Legal Proceedings | 96
Item 1A. | Risk Factors | 96
Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds | 96
Item 3. | Defaults Upon Senior Securities | 98
Item 4. | Mine Safety Disclosures | 98
Item 5. | Other Information | 98
Item 6. | Exhibits | 99
Signatures | 100

1

Table of Contents
Glossary
Certain terms used in the text and financial statements are defined below.

2024 Form 10‑K
Each of CMS Energy’s and Consumers’ Annual Report on Form 10‑K for the year ended December 31, 2024
2023 Energy Law
Michigan’s Public Acts 229, 230, 231, 233, 234, and 235 of 2023
ABATE
Association of Businesses Advocating Tariff Equity
ASP
Appliance Service Plan
Aviator Wind
Aviator Wind Holdings, LLC, a VIE in which Aviator Wind Equity Holdings holds a Class B membership interest
Aviator Wind Equity Holdings
Aviator Wind Equity Holdings, LLC, a VIE in which Grand River Wind, LLC, a wholly owned subsidiary of NorthStar Clean Energy, has a 51‑percent interest
Bay Harbor
A residential/commercial real estate area located near Petoskey, Michigan, in which CMS Energy sold its interest in 2002
Bcf
Billion cubic feet
CCR
Coal combustion residual
CEO
Chief Executive Officer
CERCLA
Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended
CFO
Chief Financial Officer

2

Table of Contents

Clean Air Act
Federal Clean Air Act of 1963, as amended
Clean Energy Plan
Consumers’ long-term strategy for delivering clean, reliable, resilient, and affordable energy to its customers; this plan was originally outlined and approved in Consumers’ 2018 integrated resource plan and subsequently updated and approved through its 2021 integrated resource plan
Clean Water Act
Federal Water Pollution Control Act of 1972, as amended
CMS Energy
CMS Energy Corporation and its consolidated subsidiaries, unless otherwise noted; the parent of Consumers and NorthStar Clean Energy
CMS Land
CMS Land Company, a wholly owned subsidiary of CMS Capital, L.L.C., a wholly owned subsidiary of CMS Energy
Consumers
Consumers Energy Company and its consolidated subsidiaries, unless otherwise noted; a wholly owned subsidiary of CMS Energy
Consumers 2014 Securitization Funding
Consumers 2014 Securitization Funding LLC, a wholly owned consolidated bankruptcy-remote subsidiary of Consumers and special-purpose entity organized for the sole purpose of purchasing and owning securitization property, issuing securitization bonds, and pledging its interest in securitization property to a trustee to collateralize the securitization bonds
Consumers 2023 Securitization Funding
Consumers 2023 Securitization Funding LLC, a wholly owned consolidated bankruptcy-remote subsidiary of Consumers and special-purpose entity organized for the sole purpose of purchasing and owning securitization property, issuing securitization bonds, and pledging its interest in securitization property to a trustee to collateralize the securitization bonds
Covert Generating Station
A 1,200-MW natural gas-fueled generation station that was acquired by Consumers in 2023 from New Covert Generating Company, LLC, a non-affiliated company
Craven
Craven County Wood Energy Limited Partnership, a VIE in which HYDRA‑CO Enterprises, Inc., a wholly owned subsidiary of NorthStar Clean Energy, has a 50‑percent interest

3

Table of Contents

CSAPR
Cross-State Air Pollution Rule of 2011, as amended
DB Pension Plans
Defined benefit pension plans of CMS Energy and Consumers, including certain present and former affiliates and subsidiaries
DB SERP
Defined Benefit Supplemental Executive Retirement Plan
Delta Solar Equity Holdings
Delta Solar Equity Holdings, LLC, a VIE in which Grand River Solar, LLC, a wholly owned subsidiary of NorthStar Clean Energy, has a 50‑percent interest
DIG
Dearborn Industrial Generation, L.L.C., a wholly owned subsidiary of Dearborn Industrial Energy, L.L.C., a wholly owned subsidiary of NorthStar Clean Energy
Dodd-Frank Act
Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010
DTE Electric
DTE Electric Company, a non‑affiliated company
EGLE
Michigan Department of Environment, Great Lakes, and Energy
Endangered Species Act
Federal Endangered Species Act of 1973, as amended
energy waste reduction
The reduction of energy consumption through energy efficiency and demand-side energy conservation, as established under Michigan law
EPA
U.S. Environmental Protection Agency
EPS
Earnings per share
ERP
Enterprise Resource Planning software

4

Table of Contents

Exchange Act
Securities Exchange Act of 1934
Federal Power Act
Federal Power Act of 1920
FERC
Federal Energy Regulatory Commission
FTR
Financial transmission right
GAAP
U.S. Generally Accepted Accounting Principles
Genesee
Genesee Power Station Limited Partnership, a VIE in which HYDRA‑CO Enterprises, Inc., a wholly owned subsidiary of NorthStar Clean Energy, has a 50‑percent interest
Good Neighbor Plan
A plan issued by the EPA which secures significant reductions in ozone-forming emissions of NOx from power plants and industrial facilities
Grayling
Grayling Generating Station Limited Partnership, a VIE in which HYDRA‑CO Enterprises, Inc., a wholly owned subsidiary of NorthStar Clean Energy, has a 50‑percent interest
GW
Gigawatt, a unit of energy equal to one billion watts
IRS
Internal Revenue Service
IT
Information technology
J.H. Campbell
J.H. Campbell Generating Complex, a three-unit coal-fueled electric generating facility comprised of Units 1 and 2, which are wholly owned by Consumers, and Unit 3, which Consumers jointly owns with the Michigan Public Power Agency, holding a 4.80‑percent interest, and Wolverine Power Supply Cooperative, Inc., holding a 1.89‑percent interest, each a non-affiliated company

5

Table of Contents

kWh
Kilowatt-hour, a unit of energy equal to one thousand watt-hours
Ludington
Ludington pumped-storage plant, jointly owned by Consumers and DTE Electric
MATS
Mercury and Air Toxics Standards, which limit mercury, acid gases, and other toxic pollution from coal‑fueled and oil‑fueled power plants
MCV Facility
A 1,647-MW natural gas-fueled, combined-cycle cogeneration facility operated by the MCV Partnership
MCV Partnership
Midland Cogeneration Venture Limited Partnership, a non-affiliated company
MD&A
Management’s Discussion and Analysis of Financial Condition and Results of Operations
METC
Michigan Electric Transmission Company, LLC, a non‑affiliated company
MGP
Manufactured gas plant
Migratory Bird Treaty Act
Migratory Bird Treaty Act of 1918, as amended
MISO
Midcontinent Independent System Operator, Inc.
MISO Tariff
MISO Open Access Transmission, Energy, and Operating Reserve Markets Tariff
mothball
To place a generating unit into a state of extended reserve shutdown in which the unit is inactive and unavailable for service for a specified period, during which the unit can be brought back into service after receiving appropriate notification and completing any necessary maintenance or other work; generation owners in MISO must request approval to mothball a unit, and MISO then evaluates the request for reliability impacts
MPSC
Michigan Public Service Commission

6

Table of Contents

MW
Megawatt, a unit of power equal to one million watts
NAAQS
National Ambient Air Quality Standards
Natural Gas Act
Natural Gas Act of 1938
Newport Solar Holdings
Newport Solar Holdings III, LLC, a VIE in which Newport Solar Equity Holdings LLC, a wholly owned subsidiary of Grand River Solar, LLC, a wholly owned subsidiary of NorthStar Clean Energy, holds a Class B membership interest
NorthStar Clean Energy
NorthStar Clean Energy Company, a wholly owned subsidiary of CMS Energy, formerly known as CMS Enterprises Company
NOx
Nitrogen oxides
NPDES
National Pollutant Discharge Elimination System, a permit system for regulating point sources of pollution under the Clean Water Act
NREPA
Part 201 of Michigan’s Natural Resources and Environmental Protection Act of 1994, as amended
NWO Holdco
NWO Holdco, L.L.C., a VIE in which NWO Holdco I, LLC, a wholly owned subsidiary of NWO Wind Equity Holdings, LLC, holds a Class B membership interest
NWO Wind Equity Holdings
NWO Wind Equity Holdings, LLC, a VIE in which Grand River Wind, LLC, a wholly owned subsidiary of NorthStar Clean Energy, has a 50‑percent interest
OBBBA
Federal One Big Beautiful Bill Act of 2025
OPEB
Other post-employment benefits

7

Table of Contents

OPEB Plan
Postretirement health care and life insurance plans of CMS Energy and Consumers, including certain present and former affiliates and subsidiaries
PCB
Polychlorinated biphenyl
PPA
Power purchase agreement
PSCR
Power supply cost recovery
RCRA
Federal Resource Conservation and Recovery Act of 1976
Reliability Roadmap
Consumers’ five-year strategy to improve its electric distribution system and the reliability of the grid; this plan was filed with the MPSC in 2023, and is an update to Consumers’ previous Electric Distribution Infrastructure Investment Plan filed in 2021
ROA
Retail Open Access, which allows electric generation customers to choose alternative electric suppliers pursuant to Michigan’s Public Acts 141 and 142 of 2000, as amended
SEC
U.S. Securities and Exchange Commission
securitization
A financing method authorized by statute and approved by the MPSC which allows a utility to sell its right to receive a portion of the rate payments received from its customers for the repayment of securitization bonds issued by a special-purpose entity affiliated with such utility
SOFR
Secured overnight financing rate calculated and published by the Federal Reserve Bank of New York
TAES
Toshiba America Energy Systems Corporation, a non-affiliated company
TBJH
TBJH Inc., a non-affiliated company

8

Table of Contents

TCJA
Tax Cuts and Jobs Act of 2017
Term SOFR
The rate per annum that is a forward-looking term rate based on SOFR
T.E.S. Filer City
T.E.S. Filer City Station Limited Partnership, a VIE in which HYDRA‑CO Enterprises, Inc., a wholly owned subsidiary of NorthStar Clean Energy, has a 50‑percent interest
Toshiba
Toshiba Corporation, a non-affiliated company
Toshiba International
Toshiba International Corporation, a non-affiliated company
UWUA
Utility Workers Union of America, AFL-CIO
VIE
Variable interest entity

9

Table of Contents
Filing Format
This combined Form 10‑Q is separately filed by CMS Energy and Consumers. Information in this combined Form 10‑Q relating to each individual registrant is filed by such registrant on its own behalf. Consumers makes no representation regarding information relating to any other companies affiliated with CMS Energy other than its own subsidiaries.
CMS Energy is the parent holding company of several subsidiaries, including Consumers and NorthStar Clean Energy. None of CMS Energy, NorthStar Clean Energy, nor any of CMS Energy’s other subsidiaries (other than Consumers) has any obligation in respect of Consumers’ debt securities or preferred stock and holders of such securities should not consider the financial resources or results of operations of CMS Energy, NorthStar Clean Energy, nor any of CMS Energy’s other subsidiaries (other than Consumers and its own subsidiaries (in relevant circumstances)) in making a decision with respect to Consumers’ debt securities or preferred stock. Similarly, neither Consumers nor any other subsidiary of CMS Energy has any obligation in respect of securities of CMS Energy.
This report should be read in its entirety. No one section of this report deals with all aspects of the subject matter of this report. This report should be read in conjunction with the consolidated financial statements and related notes and with MD&A included in the 2024 Form 10‑K.
Available Information
CMS Energy’s internet address is www.cmsenergy.com. CMS Energy routinely posts important information on its website and considers the Investor Relations section, www.cmsenergy.com/investor-relations, a channel of distribution for material information. Information contained on CMS Energy’s website is not incorporated herein.
Forward-looking Statements and Information
This Form 10‑Q and other CMS Energy and Consumers disclosures may contain forward-looking statements as defined by the Private Securities Litigation Reform Act of 1995. The use of “anticipates,” “assumes,” “believes,” “could,” “estimates,” “expects,” “forecasts,” “goals,” “guidance,” “intends,” “may,” “might,” “objectives,” “plans,” “possible,” “potential,” “predicts,” “projects,” “seeks,” “should,” “targets,” “will,” and other similar words is intended to identify forward-looking statements that involve risk and uncertainty. This discussion of potential risks and uncertainties is designed to highlight important factors that may impact CMS Energy’s and Consumers’ businesses and financial outlook. CMS Energy and Consumers have no obligation to update or revise forward-looking statements regardless of whether new information, future events, or any other factors affect the information contained in the statements. These forward-looking statements are subject to various factors that could cause CMS Energy’s and Consumers’ actual results to differ materially from the results anticipated in these statements. These factors include, but are not limited to, the following, all of which are potentially significant:
•the impact and effect of recent events, such as worsening trade relations, geopolitical tensions, war, acts of terrorism, and the responses to these events, and related economic disruptions including, but not limited to, inflation, energy price volatility, tariffs, and supply chain disruptions
•the impact of new or modified regulation by the MPSC, FERC, and other applicable governmental proceedings and regulations, including any associated impact on electric or gas rates or rate structures
10

Table of Contents
•potentially adverse regulatory treatment, effects of a failure to receive timely regulatory orders that are or could come before the MPSC, FERC, or other governmental authorities, or effects of a government shutdown
•changes in the performance of or regulations applicable to MISO, METC, pipelines, railroads, vessels, or other service providers that CMS Energy, Consumers, or any of their affiliates rely on to serve their customers
•federal or executive actions, the adoption of or challenges to federal or state laws or regulations or changes in applicable laws, rules, regulations, principles, or practices, or in their interpretation, such as those related to energy policy, ROA, the Public Utility Regulatory Policies Act of 1978, infrastructure integrity or security, cybersecurity, gas pipeline safety, gas pipeline capacity, energy waste reduction, the financial compensation mechanism, the environment, regulation or deregulation, reliability, health care reforms, taxes, tax credits, accounting matters, tariffs, climate change, air emissions, renewable energy, the Dodd-Frank Act, and other business issues that could have an impact on CMS Energy’s, Consumers’, or any of their affiliates’ businesses or financial results
•factors affecting, disrupting, interrupting, or otherwise impacting CMS Energy’s or Consumers’ facilities, utility infrastructure, operations, or backup systems, such as costs and availability of personnel, equipment, and materials; weather and climate, including catastrophic weather-related damage and extreme temperatures; natural disasters; fires; smoke; scheduled or unscheduled equipment outages; maintenance or repairs; contractor performance; environmental incidents; failures of equipment or materials; electric transmission and distribution or gas pipeline system constraints; interconnection requirements; political and social unrest; general strikes; the government and/or paramilitary response to political or social events; changes in trade policies, regulations, or tariffs; accidents; explosions; physical disasters; global pandemics; cyber incidents; physical or cyber attacks; vandalism; war or terrorism; and the ability to obtain or maintain insurance coverage for these events
•the ability of CMS Energy and Consumers to execute cost-reduction strategies and/or convert economic development opportunities
•potentially adverse regulatory or legal interpretations or decisions regarding environmental matters, or delayed regulatory treatment or permitting decisions that are or could come before agencies such as EGLE, the EPA, FERC, and/or the U.S. Army Corps of Engineers, and potential environmental remediation costs associated with these interpretations or decisions, including those that may affect Consumers’ coal ash management or routine maintenance, repair, and replacement classification under New Source Review, a construction-permitting program under the Clean Air Act
•changes in energy markets, including availability, price, and seasonality of electric capacity and energy and the timing and extent of changes in commodity prices and availability and deliverability of coal, natural gas, natural gas liquids, electricity, oil, gasoline, diesel fuel, and certain related products
•the price of CMS Energy common stock, the credit ratings of CMS Energy and Consumers, capital and financial market conditions, and the effect of these market conditions on CMS Energy’s and Consumers’ interest costs and access to the capital markets, including availability of financing to CMS Energy, Consumers, or any of their affiliates
11

Table of Contents
•the ability of CMS Energy and Consumers to execute their financing strategies
•the investment performance of the assets of CMS Energy’s and Consumers’ pension and benefit plans, the discount rates, mortality assumptions, and future medical costs used in calculating the plans’ obligations, and the resulting impact on future funding requirements
•the impact of the economy, particularly in Michigan, and potential future volatility in the financial and credit markets on CMS Energy’s, Consumers’, or any of their affiliates’ revenues, ability to collect accounts receivable from customers, or cost and availability of capital
•changes in the economic and financial viability of CMS Energy’s and Consumers’ suppliers, customers, and other counterparties and the continued ability of these third parties, including those in bankruptcy, to meet their obligations to CMS Energy and Consumers
•population changes in the geographic areas where CMS Energy and Consumers conduct business
•national, regional, and local economic, competitive, and regulatory policies, conditions, and developments
•loss of customer demand for electric generation supply to alternative electric suppliers, the creation of municipal utilities, increased use of self-generation including distributed generation, energy waste reduction, or energy storage
•loss of customer demand for natural gas due to alternative technologies or fuels or electrification
•the ability of Consumers to meet increased renewable energy demand due to customers seeking to meet their own sustainability goals in a timely and cost-efficient manner
•the reputational or other impact on CMS Energy and Consumers of the failure to meet the renewable or clean energy standards required by the 2023 Energy Law or to achieve or make timely progress on their greenhouse gas reduction goals related to reducing their impact on climate change
•adverse consequences of employee, director, or third‑party fraud or non‑compliance with codes of conduct or with laws or regulations
•federal regulation of electric sales, including periodic re‑examination by federal regulators of CMS Energy’s and Consumers’ market-based sales authorizations
•any event, change, development, occurrence, or circumstance that could impact the implementation of the Clean Energy Plan, including any action by a regulatory authority or other third party to prohibit, delay, or impair the implementation of the Clean Energy Plan
•the ability to meet increases in electric demand associated with data centers, or alternatively, the risk that anticipated demand growth from data center expansion may not materialize as expected
•the availability, cost, coverage, and terms of insurance, the stability of insurance providers, and the ability of Consumers to recover the costs of any insurance from customers
•the effectiveness of CMS Energy’s and Consumers’ risk management policies, procedures, and strategies, including strategies to hedge risk related to interest rates and future prices of electricity, natural gas, and other energy-related commodities
•factors affecting development of electric generation projects, gas transmission, and gas and electric distribution infrastructure replacement, conversion, and expansion projects, including
12

Table of Contents
factors related to project site identification, construction material availability, quality, and pricing, tariffs, embargoes on equipment, supply chain disruptions, schedule delays, interconnection delays, availability of qualified construction personnel, permitting, acquisition of property rights, community opposition, environmental regulations, performance of contractors and counterparties, and government actions
•changes or disruption in fuel supply, including but not limited to supplier bankruptcy and delivery disruptions
•potential costs, lost revenues, reputational harm, or other consequences resulting from misappropriation of assets or sensitive information, corruption of data, or operational disruption in connection with a cyberattack or other cyber incident
•potential disruption to, interruption or failure of, or other impacts on IT backup or disaster recovery systems
•technological developments in energy production, storage, delivery, usage, and metering
•the ability to implement and integrate technology successfully, including artificial intelligence
•the impact of CMS Energy’s and Consumers’ integrated business software system and its effects on their operations, including utility customer billing and collections
•adverse consequences resulting from any past, present, or future assertion of indemnity or warranty claims associated with assets and businesses previously owned by CMS Energy or Consumers, including claims resulting from attempts by foreign or domestic governments to assess taxes on or to impose environmental liability associated with past operations or transactions
•the outcome, cost, and other effects of any legal or administrative claims, proceedings, investigations, or settlements
•the reputational impact on CMS Energy and Consumers of operational incidents, violations of corporate policies, regulatory violations, inappropriate use of social media, and other events
•restrictions imposed by various financing arrangements and regulatory requirements on the ability of Consumers and other subsidiaries of CMS Energy to transfer funds to CMS Energy in the form of cash dividends, loans, or advances
•earnings volatility resulting from the application of fair value accounting to certain energy commodity contracts or interest rate contracts
•changes in financial or regulatory accounting principles or policies or interpretation of principles or policies
•other matters that may be disclosed from time to time in CMS Energy’s and Consumers’ SEC filings, or in other public documents
All forward-looking statements should be considered in the context of the risk and other factors described above and as detailed from time to time in CMS Energy’s and Consumers’ SEC filings. For additional details regarding these and other uncertainties, see Part I—Item 1. Financial Statements—MD&A—Outlook and Notes to the Unaudited Consolidated Financial Statements—Note 1, Regulatory Matters and Note 2, Contingencies and Commitments; and Part I—Item 1A. Risk Factors in the 2024 Form 10-K.
13

Table of Contents
(This page intentionally left blank)
14

Table of Contents
Part I—Financial Information
Item 1. Financial Statements
Index to Financial Statements

Management’s Discussion and Analysis of Financial Condition and Results of Operations | 16
CMS Energy Consolidated Financial Statements (Unaudited) | 48
Consolidated Statements of Income (Unaudited) | 48
Consolidated Statements of Comprehensive Income (Unaudited) | 49
Consolidated Statements of Cash Flows (Unaudited) | 51
Consolidated Balance Sheets (Unaudited) | 52
Consolidated Statements of Changes in Equity (Unaudited) | 54
Consumers Consolidated Financial Statements (Unaudited) | 55
Consolidated Statements of Income (Unaudited) | 55
Consolidated Statements of Comprehensive Income (Unaudited) | 56
Consolidated Statements of Cash Flows (Unaudited) | 57
Consolidated Balance Sheets (Unaudited) | 58
Consolidated Statements of Changes in Equity (Unaudited) | 60
Notes to the Unaudited Consolidated Financial Statements | 61
1: | Regulatory Matters | 61
2: | Contingencies and Commitments | 63
3: | Financings and Capitalization | 67
4: | Fair Value Measurements | 70
5: | Financial Instruments | 73
6: | Retirement Benefits | 74
7: | Income Taxes | 75
8: | Earnings Per Share—CMS Energy | 76
9: | Revenue | 78
10: | Reportable Segments | 83
11: | Variable Interest Entities | 91
12: | Exit Activities and Asset Sales | 94

15

Table of Contents
CMS Energy Corporation
Consumers Energy Company
Management’s Discussion and Analysis of Financial Condition and Results of Operations
This MD&A is a combined report of CMS Energy and Consumers.
Executive Overview
CMS Energy is an energy company operating primarily in Michigan. It is the parent holding company of several subsidiaries, including Consumers, an electric and gas utility, and NorthStar Clean Energy, primarily a domestic independent power producer and marketer. Consumers’ electric utility operations include the generation, purchase, distribution, and sale of electricity, and Consumers’ gas utility operations include the purchase, transmission, storage, distribution, and sale of natural gas. Consumers’ customer base consists of a mix of primarily residential, commercial, and diversified industrial customers. NorthStar Clean Energy, through its subsidiaries and equity investments, is engaged in domestic independent power production, including the development and operation of renewable generation, and the marketing of independent power production.
CMS Energy and Consumers manage their businesses by the nature of services each provides. CMS Energy operates principally in three business segments: electric utility; gas utility; and NorthStar Clean Energy, its non‑utility operations and investments. Consumers operates principally in two business segments: electric utility and gas utility. CMS Energy’s and Consumers’ businesses are affected primarily by:
•regulation and regulatory matters
•state and federal legislation
•economic conditions
•weather
•energy commodity prices
•interest rates
•their securities’ credit ratings
The Triple Bottom Line
CMS Energy’s and Consumers’ purpose is to provide safe, reliable, affordable, clean, and equitable energy in service of their customers. In support of this purpose, CMS Energy and Consumers couple digital transformation with the “CE Way,” a lean operating system designed to improve safety, quality, cost, delivery, and employee morale.
CMS Energy and Consumers measure their progress toward the purpose by considering their impact on the “triple bottom line” of people, planet, and prosperity; this consideration takes into account not only the economic value that CMS Energy and Consumers create for customers and investors, but also their responsibility to social and environmental goals. The triple bottom line balances the interests of employees, customers, suppliers, regulators, creditors, Michigan’s residents, the investment community,
16

Table of Contents
and other stakeholders, and it reflects the broader societal impacts of CMS Energy’s and Consumers’ activities.
CMS Energy’s Sustainability Report, which is available to the public, describes CMS Energy’s and Consumers’ progress toward world class performance measured in the areas of people, planet, and prosperity.
People: The people element of the triple bottom line represents CMS Energy’s and Consumers’ commitment to their employees, their customers, the residents of local communities in which they do business, and other stakeholders.
The safety of co-workers, customers, and the general public is a priority of CMS Energy and Consumers. Accordingly, CMS Energy and Consumers have worked to integrate a set of safety principles into their business operations and culture. These principles include complying with applicable safety, health, and security regulations and implementing programs and processes aimed at continually improving safety and security conditions.
CMS Energy and Consumers also place a high priority on customer value and on providing reliable, affordable, and equitable energy in service of their customers. Consumers’ customer-driven investment program is aimed at improving safety and increasing electric and gas reliability.
In the electric rate case it filed with the MPSC in June 2025, Consumers updated its Reliability Roadmap, a five-year strategy to improve Consumers’ electric distribution system and the reliability of the grid. The plan proposes spending through 2029 for projects designed to reduce the number and duration of power outages to customers through investment in infrastructure upgrades, vegetation management, and grid
17

Table of Contents
modernization. Consumers has requested rate recovery of the investments needed to achieve the Reliability Roadmap’s key objectives in its electric rate cases.
Central to Consumers’ commitment to its customers are the initiatives it has undertaken to keep electricity and natural gas affordable, including:
•replacement of coal-fueled generation and PPAs with a cost-efficient and reliable mix of renewable energy, less-costly dispatchable generation sources, and energy waste reduction and demand response programs
•targeted infrastructure investment to reduce maintenance costs and improve reliability and safety
•supply chain optimization
•economic development to increase sales and reduce overall rates
•information and control system efficiencies
•employee and retiree health care cost sharing
•tax planning
•cost-effective financing
•workforce productivity enhancements
While inflationary pressures and tariffs could impact supply chain availability and pricing, CMS Energy and Consumers are taking steps to help mitigate the impact on their ability to provide safe, reliable, affordable, clean, and equitable energy in service of their customers.
Planet: The planet element of the triple bottom line represents CMS Energy’s and Consumers’ commitment to protect the environment. This commitment extends beyond compliance with various state and federal environmental, health, and safety laws and regulations. Management considers climate change and other environmental risks in strategy development, business planning, and enterprise risk management processes.
CMS Energy and Consumers continue to focus on opportunities to protect the environment and reduce their carbon footprint from owned generation. CMS Energy, including Consumers, has decreased its combined percentage of electric supply (self-generated and purchased) from coal by 23 percentage points since 2015. Additionally, as a result of actions already taken through 2024, Consumers has:
•reduced carbon dioxide emissions from owned generation by more than 30 percent since 2005
•reduced methane emissions by nearly 30 percent since 2012
•reduced the volume of water used to generate electricity by more than 50 percent since 2012
•reduced landfill waste disposal by more than two million tons since 1992
•enhanced, restored, or protected more than 11,700 acres of land since 2017
•reduced sulfur dioxide and particulate matter emissions by nearly 95 percent since 2005
•reduced NOx emissions by more than 86 percent since 2005
•reduced mercury emissions by more than 92 percent since 2007
In 2023, Michigan enacted the 2023 Energy Law, which among other things:
•raised the renewable energy standard from the present 15‑percent requirement to 50 percent by 2030 and 60 percent by 2035; renewable energy generated anywhere within MISO can be applied to meeting this standard, with certain limitations
•set a clean energy standard of 80 percent by 2035 and 100 percent by 2040; low- or zero-carbon emitting resources, such as nuclear generation and natural gas generation coupled with carbon capture, are considered clean energy sources under this standard
18

Table of Contents
•enhanced existing incentives for energy efficiency programs and returns earned on new clean or renewable PPAs
•created a new energy storage standard that requires electric utilities to file plans by 2029 to obtain new energy storage that will contribute to a Michigan target of 2,500 MW based on their pro rata share
•expanded the statutory cap on distributed generation resources to 10 percent of utility sales
Consumers’ updates to its renewable energy plan, which were approved by the MPSC in September 2025, and planned updates to its Clean Energy Plan in 2026 will serve as a blueprint to meeting the requirements of the 2023 Energy Law by focusing on increasing the generation of renewable energy, deploying energy storage, helping customers use less energy, and offering demand response programs to reduce demand during critical peak times.
Consumers’ Clean Energy Plan details its strategy to meet customers’ long-term energy needs and was most recently revised and approved by the MPSC in 2022 under Michigan’s integrated resource planning process. The Clean Energy Plan outlines Consumers’ long-term strategy for delivering safe, reliable, affordable, clean, and equitable energy to its customers. This strategy includes:
•ending the use of coal in owned generation in 2025, 15 years sooner than initially planned
•purchasing the Covert Generating Station, a natural gas-fueled generating facility with 1,200 MW of nameplate capacity, allowing Consumers to continue to provide controllable sources of electricity to customers; this purchase was completed in 2023
•soliciting capacity from sources able to deliver to Michigan’s Lower Peninsula, including battery storage facilities
In May 2025, before the planned closure of J.H. Campbell, the U.S. Secretary of Energy issued an emergency order under section 202(c) of the Federal Power Act requiring J.H. Campbell to continue operating for 90 days, through August 20, 2025. The order stated that continued operation of J.H. Campbell was required to meet an energy emergency across MISO’s North and Central regions. Consistent with the Federal Power Act and the U.S. Department of Energy regulations, the order authorizes Consumers to obtain cost recovery at FERC. As directed, Consumers continued to make J.H. Campbell available in the MISO market and filed a complaint at FERC seeking a modification of the MISO Tariff to establish a mechanism for recovery and allocation of the cost to comply with this order. In August 2025, FERC issued an order granting Consumers’ requested relief and ordered MISO to file a revised tariff, which MISO filed in September 2025 and is pending at FERC.
On August 20, 2025, the U.S. Secretary of Energy issued a second emergency order requiring J.H. Campbell to continue operating for another 90 days, through November 19, 2025. Consumers is complying with the August 2025 emergency order and will seek recovery of its compliance costs at a later date, consistent with rate recovery sought for the May 2025 emergency order. The U.S. Department of Energy may issue more orders to require the continued operation of J.H. Campbell. Consumers cannot predict the long-term impact of these orders, litigation surrounding the orders, or additional orders or similar governmental actions, on the Clean Energy Plan.
Consumers’ updates to its renewable energy plan include up to 9,000 MW of both purchased and owned solar energy resources and the addition of up to 2,800 MW of new, competitively bid wind energy resources. Coupled with updates to the Clean Energy Plan, these actions will enable Consumers to achieve 60‑percent renewable energy by 2035 and 100‑percent clean energy by 2040, and will also contribute to Consumers’ achievement of the net-zero emissions goals discussed below.
Net-zero methane emissions from natural gas delivery system by 2030: Under its Methane Reduction Plan, Consumers plans to reduce methane emissions from its system by about 80 percent, from 2012
19

Table of Contents
baseline levels, by accelerating the replacement of aging pipe, rehabilitating or retiring outdated infrastructure, and adopting new technologies and practices. The remaining emissions will likely be offset through clean fuel alternatives or nature-based carbon removal pathways. To date, Consumers has reduced methane emissions by nearly 30 percent.
Net-zero greenhouse gas emissions target for the entire business by 2050: This goal incorporates greenhouse gas emissions from Consumers’ natural gas delivery system, including suppliers and customers, and has an interim goal of reducing customer emissions by 25 percent by 2035. Consumers expects to meet this goal through carbon offset measures, renewable natural gas, energy efficiency and demand response programs, and the adoption of cost-effective emerging technologies once proven and commercially available.
Additionally, to advance its environmental stewardship in Michigan and to minimize the impact of future regulations, Consumers set the following goals for the five-year period 2023 through 2027:
•to enhance, restore, or protect 6,500 acres of land through 2027; Consumers had enhanced, restored, or protected more than 5,000 acres of land towards this goal through 2024
•to reduce water usage by 1.7 billion gallons through 2027; Consumers had reduced water usage by more than 1.3 billion gallons towards this goal through 2024
•to annually divert a minimum of 90 percent of waste from landfills (through waste reduction, recycling, and reuse); during 2024, Consumers’ rate of waste diverted from landfills was 92 percent
CMS Energy and Consumers are monitoring numerous legislative, policy, and regulatory initiatives, including those related to regulation and reporting of greenhouse gases, and related litigation. While CMS Energy and Consumers cannot predict the outcome of these matters, which could affect them materially, they intend to continue to move forward with a triple-bottom-line approach that focuses on people, planet, and prosperity.
Prosperity: The prosperity element of the triple bottom line represents CMS Energy’s and Consumers’ commitment to meeting their financial objectives and providing economic development opportunities and benefits in the communities in which they do business. CMS Energy’s and Consumers’ financial strength allows them to maintain solid investment-grade credit ratings and thereby reduce funding costs for the benefit of customers and investors, to attract and retain talent, and to reinvest in the communities they serve.
For the nine months ended September 30, 2025, CMS Energy’s net income available to common stockholders was $775 million, and diluted EPS were $2.59. This compares with net income available to common stockholders of $731 million and diluted EPS of $2.45 for the nine months ended September 30, 2024. In 2025, higher gas sales due primarily to favorable weather and electric and gas rate increases were offset partially by lower earnings at NorthStar Clean Energy and increased depreciation and property taxes, reflecting higher capital spending. A more detailed discussion of the factors affecting CMS Energy’s and Consumers’ performance can be found in the Results of Operations section that follows this Executive Overview.
Over the next five years, Consumers expects weather-normalized electric deliveries to increase compared to 2024. This outlook reflects strong growth in electric demand, offset partially by the effects of energy waste reduction programs. Weather-normalized gas deliveries are expected to remain stable relative to 2024, reflecting modest growth in gas demand, offset by the effects of energy waste reduction programs.
20

Table of Contents
Performance: Impacting the Triple Bottom Line
CMS Energy and Consumers remain committed to delivering safe, reliable, affordable, clean, and equitable energy in service of their customers and positively impacting the triple bottom line of people, planet, and prosperity. During 2025, CMS Energy and Consumers:
•reached an agreement with a new data center expected to add up to 1 GW of incremental load growth in our service territory, supporting long-term sales growth and delivering economic benefits for Michigan
•expanded the use of drone technology enabling faster, safer inspections of 400 miles of hard-to-reach power lines and infrastructure resulting in reduced average outage time per customer and improved storm recovery capabilities
•announced the launch of “Green Giving,” a program enabling the general public to contribute to renewable energy while offering financial benefits to low-income customers, along with a new Residential Renewable Energy Program, which allows customers of all income levels to subscribe and match their energy usage with renewable energy sources, supporting clean energy initiatives
•moved forward with an aggressive plan to enhance grid reliability for nearly two million homes and businesses by clearing trees along 8,000 miles of power lines and creating a modern, stronger, and more resilient power grid through infrastructure upgrades and technology investments
•announced deployment of eight state-of-the-art vehicles that will survey the company’s nearly 30,000-mile gas distribution system to find methane emissions, enhancing safety and reliability for Consumers’ natural gas customers
•experienced success with the underground power line pilot program in early 2025, with pilot areas seeing 100‑percent reduction in storm-related outages and improved customer satisfaction
CMS Energy and Consumers will continue to utilize the CE Way to enable them to achieve world class performance and positively impact the triple bottom line. Consumers’ investment plan and the regulatory environment in which it operates also drive its ability to impact the triple bottom line.
Investment Plan: Over the next five years, Consumers expects to make significant expenditures on infrastructure upgrades, replacements, and clean generation. While it has a large number of potential investment opportunities that would add customer value, Consumers has prioritized its spending based on the criteria of enhancing public safety, increasing reliability, maintaining affordability for its customers, and advancing its environmental stewardship. Consumers’ investment program, which is subject to approval through general rate case and other MPSC proceedings, is expected to result in annual rate-base growth of more than 8 percent. This rate-base growth, together with cost-control measures, should allow Consumers to maintain affordable customer prices.
21

Table of Contents
Presented in the following illustration are Consumers’ planned capital expenditures through 2029 of $20.0 billion:
Of this amount, Consumers plans to spend $14.8 billion over the next five years primarily to maintain and upgrade its electric distribution systems and gas infrastructure in order to enhance safety and reliability, improve customer satisfaction, reduce energy waste on those systems, and facilitate its clean energy transformation. Electric distribution and other projects comprise $8.5 billion primarily to strengthen circuits and substations, replace poles, and interconnect clean energy resources. The gas infrastructure projects comprise $6.3 billion to sustain deliverability, enhance pipeline integrity and safety, and reduce methane emissions. Consumers also expects to spend $5.2 billion on clean generation, which includes investments in wind, solar, and hydroelectric generation resources.
Regulation: Regulatory matters are a key aspect of Consumers’ business, particularly rate cases and regulatory proceedings before the MPSC, which permit recovery of new investments while helping to ensure that customer rates are fair and affordable. Important regulatory events and developments not already discussed are summarized below.
2024 Electric Rate Case: In March 2025, the MPSC issued an order authorizing an annual rate increase of $176 million, which is inclusive of a $22 million surcharge for the recovery of distribution investments made in 2023 that exceeded the rate amounts authorized in accordance with previous electric rate orders. The approved rate increase is based on a 9.90‑percent authorized return on equity. The new rates became effective in April 2025.
2025 Electric Rate Case: In June 2025, Consumers filed an application with the MPSC seeking a rate increase of $460 million, made up of two components. First, Consumers requested a $436 million annual rate increase, based on a 10.25‑percent authorized return on equity for the projected 12‑month period ending April 30, 2027. The filing requested authority to recover costs related to new infrastructure investment primarily in distribution system reliability. Second, Consumers requested approval of a $24 million surcharge for the recovery of distribution investments made during the 12 months ended February 28, 2025 that exceeded the rate amounts authorized in accordance with previous electric rate
22

Table of Contents
orders. In October 2025, Consumers revised its requested increase to $447 million. The MPSC must issue a final order in this case before or in April 2026.
2024 Gas Rate Case: In December 2024, Consumers filed an application with the MPSC seeking an annual rate increase of $248 million based on a 10.25‑percent authorized return on equity for the projected 12‑month period ending October 31, 2026. In July 2025, Consumers revised its requested increase to $217 million.In September 2025, the MPSC issued an order authorizing an annual rate increase of $157.5 million, based on a 9.80‑percent authorized return on equity. The new rates become effective in November 2025.
Looking Forward
CMS Energy and Consumers will continue to consider the impact on the triple bottom line of people, planet, and prosperity in their daily operations as well as in their long-term strategic decisions. Consumers will continue to seek fair and timely regulatory treatment that will support its customer-driven investment plan, while pursuing cost-control measures that will allow it to maintain sustainable customer base rates. The CE Way is an important means of realizing CMS Energy’s and Consumers’ purpose of providing safe, reliable, affordable, clean, and equitable energy in service of their customers.
23

Table of Contents
Results of Operations
CMS Energy Consolidated Results of Operations

In Millions, Except Per Share Amounts
| Three Months Ended |  | Nine Months Ended
September 30 | 2025 | 2024 | Change |  | 2025 | 2024 | Change |
Net Income Available to Common Stockholders |  | $ | 275 |  |  | $ | 251 |  |  | $ | 24 |  |  |  | $ | 775 |  |  | $ | 731 |  |  | $ | 44 |  |  |
Basic Earnings Per Average Common Share |  | $ | 0.92 |  |  | $ | 0.84 |  |  | $ | 0.08 |  |  |  | $ | 2.59 |  |  | $ | 2.45 |  |  | $ | 0.14 |  |  |
Diluted Earnings Per Average Common Share |  | $ | 0.92 |  |  | $ | 0.84 |  |  | $ | 0.08 |  |  |  | $ | 2.59 |  |  | $ | 2.45 |  |  | $ | 0.14 |  |  |

In Millions
| Three Months Ended |  | Nine Months Ended
September 30 | 2025 | 2024 | Change |  | 2025 | 2024 | Change |  |  |
Electric utility |  | $ | 326 |  |  | $ | 273 |  |  | $ | 53 |  |  |  | $ | 617 |  |  | $ | 540 |  |  | $ | 77 |  |  |  |  |  |  |
Gas utility |  | — |  |  | 11 |  |  | (11) |  |  |  | 238 |  |  | 195 |  |  | 43 |  |  |  |  |  |  |
NorthStar Clean Energy |  | 11 |  |  | 6 |  |  | 5 |  |  |  | 15 |  |  | 53 |  |  | (38) |  |  |  |  |  |  |
Corporate interest and other |  | (62) |  |  | (39) |  |  | (23) |  |  |  | (95) |  |  | (57) |  |  | (38) |  |  |  |  |  |  |
Net Income Available to Common Stockholders |  | $ | 275 |  |  | $ | 251 |  |  | $ | 24 |  |  |  | $ | 775 |  |  | $ | 731 |  |  | $ | 44 |  |  |  |  |  |  |

24

Table of Contents
Presented in the following table is a summary of changes to net income available to common stockholders for the three and nine months ended September 30, 2025 versus 2024:

In Millions
| Three Months Ended |  | Nine Months Ended
September 30, 2024 |  |  |  | $ | 251 |  |  |  |  |  | $ | 731 |
Reasons for the change |  |  |  |  |  |  |  |  |
Consumers electric utility and gas utility |  |  |  |  |  |  |  |  |
Electric sales |  | $ | 26 |  |  |  |  |  | $ | 41 |  |  |
Gas sales |  | 7 |  |  |  |  |  | 87 |  |  |
Electric rate increase |  | 99 |  |  |  |  |  | 179 |  |  |
Gas rate increase, including gain amortization in lieu of rate relief |  | 10 |  |  |  |  |  | 45 |  |  |
Lower service restoration costs, net of 2025 deferred storm expense 1 |  | 7 |  |  |  |  |  | 30 |  |  |
Higher income tax expense |  | (45) |  |  |  |  |  | (83) |  |  |
Higher depreciation and amortization |  | (13) |  |  |  |  |  | (48) |  |  |
Higher interest charges |  | (14) |  |  |  |  |  | (30) |  |  |
Higher other maintenance and operating expenses |  | (13) |  |  |  |  |  | (26) |  |  |
Higher property taxes, reflecting higher capital spending |  | (9) |  |  |  |  |  | (23) |  |  |
Higher IT expenses, including early-phase ERP implementation costs |  | (7) |  |  |  |  |  | (17) |  |  |
Higher vegetation management cost |  | (2) |  |  |  |  |  | (15) |  |  |
Lower other income, net of expenses |  | (4) |  |  |  |  |  | (14) |  |  |
Absence of ASP revenue, net of expense, due to sale in 2024 |  | — |  |  |  |  |  | (6) |  |  |
|  |  |  | $ | 42 |  |  |  |  |  | $ | 120 |
NorthStar Clean Energy (see below for additional detail) |  |  |  | 5 |  |  |  |  |  | (38) |
Corporate interest and other |  |  |  | (23) |  |  |  |  |  | (38) |
September 30, 2025 |  |  |  | $ | 275 |  |  |  |  |  | $ | 775 |

1 See Notes to the Unaudited Consolidated Financial Statements—Note 1, Regulatory Matters.
25

Table of Contents
Consumers Electric Utility Results of Operations
Presented in the following table are the detailed changes to the electric utility’s net income available to common stockholders for the three and nine months ended September 30, 2025 versus 2024:

In Millions
| Three Months Ended |  | Nine Months Ended
September 30, 2024 |  |  |  | $ | 273 |  |  |  |  |  | $ | 540 |
Reasons for the change |  |  |  |  |  |  |  |  |
Electric deliveries 1 and rate increases |  |  |  |  |  |  |  |  |
Rate increase, including return on higher renewable capital spending |  | $ | 99 |  |  |  |  |  | $ | 179 |  |  |
Higher revenue due primarily to higher sales volume |  | 19 |  |  |  |  |  | 19 |  |  |
Higher (lower) energy waste reduction program revenues |  | (3) |  |  |  |  |  | 12 |  |  |
Higher other revenues |  | 7 |  |  |  |  |  | 22 |  |  |
|  |  |  | $ | 122 |  |  |  |  |  | $ | 232 |
Maintenance and other operating expenses |  |  |  |  |  |  |  |  |
Lower service restoration costs, net of 2025 deferred storm expense 2 |  | 7 |  |  |  |  |  | 30 |  |  |
Higher vegetation management cost |  | (2) |  |  |  |  |  | (15) |  |  |
Lower (higher) energy waste reduction program costs |  | 3 |  |  |  |  |  | (12) |  |  |
Higher IT expenses, including early-phase ERP implementation costs |  | (5) |  |  |  |  |  | (12) |  |  |
Higher other maintenance and operating expenses |  | (6) |  |  |  |  |  | (16) |  |  |
|  |  |  | (3) |  |  |  |  |  | (25) |
Depreciation and amortization |  |  |  |  |  |  |  |  |
Increased plant in service, reflecting higher capital spending |  |  |  | (10) |  |  |  |  |  | (31) |
General taxes |  |  |  |  |  |  |  |  |
Higher property taxes, reflecting higher capital spending |  |  |  | (6) |  |  |  |  |  | (13) |
Other income, net of expenses |  |  |  | (1) |  |  |  |  |  | (8) |
Interest charges |  |  |  | (10) |  |  |  |  |  | (21) |
Income taxes |  |  |  |  |  |  |  |  |
Higher electric utility pre-tax earnings |  | (24) |  |  |  |  |  | (36) |  |  |
Absence of 2024 deferred tax liability reversals |  | (11) |  |  |  |  |  | (11) |  |  |
State deferred tax remeasurement 3 |  | — |  |  |  |  |  | (8) |  |  |
Higher other income taxes |  | (4) |  |  |  |  |  | (2) |  |  |
|  |  |  | (39) |  |  |  |  |  | (57) |
September 30, 2025 |  |  |  | $ | 326 |  |  |  |  |  | $ | 617 |

1 For the three months ended September 30, deliveries to end-use customers were 10.4 billion kWh in 2025 and 10.1 billion kWh in 2024. For the nine months ended September 30, deliveries to end-use customers were 28.4 billion kWh in 2025 and 28.0 billion kWh in 2024.
2 See Notes to the Unaudited Consolidated Financial Statements—Note 1, Regulatory Matters.
3 See Notes to the Unaudited Consolidated Financial Statements—Note 7, Income Taxes.
26

Table of Contents
Consumers Gas Utility Results of Operations
Presented in the following table are the detailed changes to the gas utility’s net income available to common stockholders for the three and nine months ended September 30, 2025 versus 2024:

In Millions
| Three Months Ended |  | Nine Months Ended
September 30, 2024 |  |  |  | $ | 11 |  |  |  |  |  | $ | 195 |
Reasons for the change |  |  |  |  |  |  |  |  |
Gas deliveries 1 and rate increases |  |  |  |  |  |  |  |  |
Rate increase |  | $ | 8 |  |  |  |  |  | $ | 26 |  |  |
Higher revenue due primarily to the absence of 2024 unfavorable weather |  | 6 |  |  |  |  |  | 88 |  |  |
Higher energy waste reduction program revenues |  | — |  |  |  |  |  | 12 |  |  |
Absence of ASP business revenue 2 |  | — |  |  |  |  |  | (19) |  |  |
ASP gain customer bill credit 2 |  | (2) |  |  |  |  |  | (20) |  |  |
|  |  |  | $ | 12 |  |  |  |  |  | $ | 87 |
Maintenance and other operating expenses |  |  |  |  |  |  |  |  |
Amortization of ASP gain 2 |  | 5 |  |  |  |  |  | 38 |  |  |
Absence of 2024 ASP business expense 2 |  | — |  |  |  |  |  | 13 |  |  |
Higher IT expenses, including early-phase ERP implementation costs |  | (2) |  |  |  |  |  | (5) |  |  |
Higher energy waste reduction program costs |  | — |  |  |  |  |  | (12) |  |  |
Higher maintenance and other operating expenses |  | (7) |  |  |  |  |  | (10) |  |  |
|  |  |  | (4) |  |  |  |  |  | 24 |
Depreciation and amortization |  |  |  |  |  |  |  |  |
Increased plant in service, reflecting higher capital spending |  |  |  | (3) |  |  |  |  |  | (17) |
General taxes |  |  |  |  |  |  |  |  |
Higher property taxes, reflecting higher capital spending |  |  |  | (3) |  |  |  |  |  | (10) |
Other income, net of expenses |  |  |  | (3) |  |  |  |  |  | (6) |
Interest charges |  |  |  | (4) |  |  |  |  |  | (9) |
Income taxes |  |  |  |  |  |  |  |  |
Lower (higher) gas utility pre-tax earnings |  | 1 |  |  |  |  |  | (18) |  |  |
Absence of 2024 deferred tax liability reversals |  | (5) |  |  |  |  |  | (5) |  |  |
State deferred tax remeasurement 3 |  | — |  |  |  |  |  | (4) |  |  |
Lower (higher) other income taxes |  | (2) |  |  |  |  |  | 1 |  |  |
|  |  |  | (6) |  |  |  |  |  | (26) |
September 30, 2025 |  |  |  | $ | — |  |  |  |  |  | $ | 238 |

1 For the three months ended September 30, deliveries to end-use customers were 30 Bcf in 2025 and 28 Bcf in 2024. For the nine months ended September 30, deliveries to end-use customers were 213 Bcf in 2025 and 186 Bcf in 2024.
2 In April 2024, Consumers sold its unregulated ASP business to a non-affiliated company, resulting in a $110 million gain. In July 2024, the MPSC approved the utilization of $27.5 million, or one-fourth, of the gain on the sale as an offset to the revenue deficiency in lieu of additional rate relief during the 12‑month period beginning October 1, 2024, with the remaining three-fourths of the gain, or $82.5 million, to be credited to customers as a bill credit over a three-year period beginning October 1, 2024.
3 See Notes to the Unaudited Consolidated Financial Statements—Note 7, Income Taxes.
27

Table of Contents
NorthStar Clean Energy Results of Operations
Presented in the following table are the detailed changes to NorthStar Clean Energy’s net income available to common stockholders for the three and nine months ended September 30, 2025 versus 2024:

In Millions
| Three Months Ended |  | Nine Months Ended
September 30, 2024 |  |  |  | $ | 6 |  |  |  |  |  | $ | 53 |
Reason for the change |  |  |  |  |  |  |  |  |
Higher (lower) earnings from renewable projects 1 |  |  |  | $ | 3 |  |  |  |  |  | $ | (24) |
Higher (lower) operating earning 2 |  |  |  | 7 |  |  |  |  |  | (16) |
Lower (higher) other expense |  |  |  | 2 |  |  |  |  |  | (1) |
Lower (higher) tax expense |  |  |  | (7) |  |  |  |  |  | 3 |
September 30, 2025 |  |  |  | $ | 11 |  |  |  |  |  | $ | 15 |

1 Reflects timing of achieving commercial operation during the nine months ended September 30, 2025 versus 2024.
2 Reflects planned major outage at DIG during the nine months ended September 30, 2025 versus 2024.
Corporate Interest and Other Results of Operations
Presented in the following table are the detailed changes to corporate interest and other results for the three and nine months ended September 30, 2025 versus 2024:

In Millions
| Three Months Ended |  | Nine Months Ended
September 30, 2024 |  |  |  | $ | (39) |  |  |  |  |  | $ | (57) |
Reasons for the change |  |  |  |  |  |  |  |  |
Higher interest charges |  |  |  | $ | (16) |  |  |  |  |  | $ | (44) |
Lower gains on extinguishment of debt |  |  |  | (20) |  |  |  |  |  | (18) |
Lower other expense |  |  |  | 5 |  |  |  |  |  | 14 |
Lower tax expense |  |  |  | 8 |  |  |  |  |  | 10 |
September 30, 2025 |  |  |  | $ | (62) |  |  |  |  |  | $ | (95) |

28

Table of Contents
Cash Position, Investing, and Financing
At September 30, 2025, CMS Energy had $432 million of consolidated cash and cash equivalents, which included $70 million of restricted cash and cash equivalents. At September 30, 2025, Consumers had $311 million of consolidated cash and cash equivalents, which included $69 million of restricted cash and cash equivalents.
Operating Activities
Presented in the following table are specific components of net cash provided by operating activities for the nine months ended September 30, 2025 versus 2024:

In Millions
CMS Energy, including Consumers |  |
Nine Months Ended September 30, 2024 |  | $ | 1,967 |
Reasons for the change |  |
Higher net income |  | $ | 68 |
Non‑cash transactions 1 |  | 89 |
Unfavorable impact of changes in core working capital,2 due primarily to fluctuations in gas prices and higher undercollections of PSCR |  | (277) |
Unfavorable impact of changes in other assets and liabilities, due primarily to higher service restoration expenditures 3 |  | (90) |
Nine Months Ended September 30, 2025 |  | $ | 1,757 |
Consumers |  |
Nine Months Ended September 30, 2024 |  | $ | 2,014 |
Reasons for the change |  |
Higher net income |  | $ | 122 |
Non‑cash transactions 1 |  | (42) |
Unfavorable impact of changes in core working capital,2 due primarily to fluctuations in gas prices and higher undercollections of PSCR |  | (271) |
Unfavorable impact of changes in other assets and liabilities, due primarily to higher service restoration expenditures 3 |  | (49) |
Nine Months Ended September 30, 2025 |  | $ | 1,774 |

1 Non‑cash transactions comprise depreciation and amortization, changes in deferred income taxes and investment tax credits, and other non‑cash operating activities and reconciling adjustments.
2 Core working capital comprises accounts receivable, accrued revenue, inventories, accounts payable, and accrued rate refunds.
3 See Notes to the Unaudited Consolidated Financial Statements—Note 1, Regulatory Matters.
29

Table of Contents
Investing Activities
Presented in the following table are specific components of net cash used in investing activities for the nine months ended September 30, 2025 versus 2024:

In Millions
CMS Energy, including Consumers |  |
Nine Months Ended September 30, 2024 |  | $ | (2,101) |
Reasons for the change |  |
Higher capital expenditures |  | $ | (650) |
Absence of proceeds from sale of ASP business in 2024 |  | (124) |
Other investing activities, primarily higher cost to retire property |  | (51) |
Nine Months Ended September 30, 2025 |  | $ | (2,926) |
Consumers |  |
Nine Months Ended September 30, 2024 |  | $ | (1,994) |
Reasons for the change |  |
Higher capital expenditures |  | $ | (390) |
Absence of proceeds from sale of ASP business in 2024 |  | (124) |
Other investing activities, primarily higher cost to retire property |  | (61) |
Nine Months Ended September 30, 2025 |  | $ | (2,569) |

30

Table of Contents
Financing Activities
Presented in the following table are specific components of net cash provided by financing activities for the nine months ended September 30, 2025 versus 2024:

In Millions
CMS Energy, including Consumers |  |
Nine Months Ended September 30, 2024 |  | $ | 353 |
Reasons for the change |  |
Higher debt issuances |  | $ | 1,064 |
Higher debt retirements |  | (95) |
Lower repayments of notes payable |  | 28 |
Higher issuances of common stock |  | 90 |
Higher payments of dividends on common stock |  | (26) |
Proceeds from sale of membership interests in VIEs |  | 44 |
Other financing activities, primarily higher debt issuance costs |  | (35) |
Nine Months Ended September 30, 2025 |  | $ | 1,423 |
Consumers |  |
Nine Months Ended September 30, 2024 |  | $ | 327 |
Reasons for the change |  |
Lower debt issuances |  | $ | (174) |
Lower debt retirements |  | 222 |
Lower repayments of notes payable |  | 28 |
Higher stockholder contribution from CMS Energy |  | 375 |
Absence of return of stockholder contribution to CMS Energy in 2024 |  | 320 |
Higher payments of dividends on common stock |  | (105) |
Other financing activities |  | (6) |
Nine Months Ended September 30, 2025 |  | $ | 987 |

31

Table of Contents
Capital Resources and Liquidity
CMS Energy and Consumers expect to have sufficient liquidity to fund their present and future commitments. CMS Energy uses dividends and tax-sharing payments from its subsidiaries and external financing and capital transactions to invest in its utility and non‑utility businesses, retire debt, pay dividends, and fund its other obligations. The ability of CMS Energy’s subsidiaries, including Consumers, to pay dividends to CMS Energy depends upon each subsidiary’s revenues, earnings, cash needs, and other factors. In addition, Consumers’ ability to pay dividends is restricted by certain terms included in its articles of incorporation and potentially by FERC requirements and provisions under the Federal Power Act and the Natural Gas Act. For additional details on Consumers’ dividend restrictions, see Notes to the Unaudited Consolidated Financial Statements—Note 3, Financings and Capitalization—Dividend Restrictions. During the nine months ended September 30, 2025, Consumers paid $649 million in dividends on its common stock to CMS Energy.
Consumers uses cash flows generated from operations, external financing transactions, and the monetization of tax credits, along with stockholder contributions from CMS Energy, to fund capital expenditures, retire debt, pay dividends, and fund its other obligations. Consumers also uses these sources of funding to contribute to its employee benefit plans.
Financing and Capital Resources: CMS Energy and Consumers rely on the capital markets to fund their robust capital plan. Barring any sustained market dislocations or disruptions, CMS Energy and Consumers expect to continue to have ready access to the financial and capital markets and will continue to explore possibilities to take advantage of market opportunities as they arise with respect to future funding needs. If access to these markets were to diminish or otherwise become restricted, CMS Energy and Consumers would implement contingency plans to address debt maturities, which could include reduced capital spending.
In 2023, CMS Energy entered into an equity offering program under which it may sell shares of its common stock having an aggregate sales price of up to $1 billion in privately negotiated transactions, in “at the market” offerings, or through forward sales transactions. During the nine months ended September 30, 2025, CMS Energy settled forward sale contracts issued under this program, resulting in net proceeds o f $349 million. An additional settlement in October 2025 resulted in net proceeds of $147 million. Following these settlements, CMS Energy has $8 million in outstanding forward contracts under the program, maturing through November 30, 2026.
CMS Energy, NorthStar Clean Energy, and Consumers use revolving credit facilities for general working capital purposes and to issue letters of credit. At September 30, 2025, CMS Energy had $515 million of its revolving credit facility available, NorthStar Clean Energy had $62 million available under its revolving credit facility, and Consumers had $1.2 billion available under its revolving credit facilities.
An additional source of liquidity is Consumers’ commercial paper program, which allows Consumers to issue, in one or more placements, up to $500 million in aggregate principal amount of commercial paper notes with maturities of up to 365 days at market interest rates. These issuances are supported by Consumers’ revolving credit facilities. While the amount of outstanding commercial paper does not reduce the available capacity of the revolving credit facilities, Consumers does not intend to issue commercial paper in an amount exceeding the available capacity of the facilities. At September 30, 2025, there were no commercial paper notes outstanding under this program.
For additional details about these programs and facilities, see Notes to the Unaudited Consolidated Financial Statements—Note 3, Financings and Capitalization.
32

Table of Contents
Certain of CMS Energy’s, NorthStar Clean Energy’s, and Consumers’ credit agreements contain covenants that require each entity to maintain certain financial ratios, as defined therein. At September 30, 2025, no default had occurred with respect to any of the financial covenants contained in these credit agreements. Each of the entities was in compliance with the covenants contained in their respective credit agreements as of September 30, 2025, as presented in the following table:

| Limit | Actual
CMS Energy, parent only |  |
Debt to capital 1 | < 0.70 to 1.0 | 0.55 to 1.0
NorthStar Clean Energy, including subsidiaries |  |
Debt to capital 2 | < 0.50 to 1.0 | 0.13 to 1.0
Debt service coverage 2 | > 2.00 to 1.0 | 3.41 to 1.0
Pledged equity interests to aggregate commitment 2,3 | > 2.00 to 1.0 | 2.06 to 1.0
Consumers |  |
Debt to capital 4 | < 0.65 to 1.0 | 0.51 to 1.0

1 Applies to CMS Energy’s revolving credit agreement and letter of credit reimbursement agreement.
2 Applies to NorthStar Clean Energy’s revolving credit agreement.
3 The aggregate book value of the pledged equity interests under the revolving credit agreement was at least two-times the aggregate commitment under the revolving credit agreement at September 30, 2025.
4 Applies to Consumers’ revolving credit agreements and letter of credit reimbursement agreement.
Outlook
Several business trends and uncertainties may affect CMS Energy’s and Consumers’ financial condition and results of operations. These trends and uncertainties could have a material impact on CMS Energy’s and Consumers’ consolidated income, cash flows, or financial position.
During 2025, the federal government has taken numerous executive actions related to tariffs and trade, alleviating regulatory burdens, and environmental regulations and enforcement, among other areas of potential impact. Many of these actions require further implementation by federal agencies and departments, and some of these actions will likely be subject to further judicial review. CMS Energy and Consumers continue to monitor these executive actions and will continue taking steps to deliver consistently on the triple bottom line.
For additional details regarding these and other uncertainties, see Forward-looking Statements and Information; Notes to the Unaudited Consolidated Financial Statements—Note 1, Regulatory Matters and Note 2, Contingencies and Commitments; and Item 1A. Risk Factors in the 2024 Form 10-K.
33

Table of Contents
Consumers Electric Utility Outlook and Uncertainties
Energy Transformation: Consumers’ Clean Energy Plan details its long-term strategy for delivering safe, reliable, affordable, clean, and equitable energy to its customers. Coupled with Consumers’ renewable energy plan, the Clean Energy Plan will be Consumers’ blueprint to meeting the requirements of the 2023 Energy Law. Among other things, this law:
•raised the renewable energy standard from the present 15‑percent requirement to 50 percent by 2030 and 60 percent by 2035
•set a clean energy standard of 80 percent by 2035 and 100 percent by 2040; low- or zero-carbon emitting resources, such as nuclear generation and natural gas generation coupled with carbon capture, are considered clean energy sources under this standard
•created a new energy storage standard that requires electric utilities to file plans by 2029 to obtain new energy storage that will contribute to a Michigan target of 2,500 MW based on their pro rata share
While Consumers’ existing Clean Energy Plan, established under Michigan’s integrated resource planning process, provides a path towards meeting these requirements, Consumers will file updates to the plan in 2026 to expand and solidify that path. Additionally, Consumers filed updates to its renewable energy plan to achieve the increased renewable energy standard; the MPSC approved updates in September 2025. Together, these plans will enable Consumers to achieve 60‑percent renewable energy by 2035 and 100‑percent clean energy by 2040. Also through its Clean Energy Plan, Consumers continues to make progress on expanding its customer programs, namely its demand response, energy efficiency, and conservation voltage reduction programs, as well as increasing its renewable energy generation.
The strategy outlined in Consumers’ Clean Energy Plan includes ending the use of coal in owned generation in 2025. In 2023, Consumers retired the D.E. Karn coal-fueled generating units, totaling 515 MW of nameplate capacity, and as authorized by the MPSC, issued securitization bonds to finance the recovery of and return on those units. Additionally, Consumers had planned to retire J.H. Campbell, totaling 1,407 MW of nameplate capacity, in May 2025. The MPSC authorized regulatory asset treatment for Consumers to recover the remaining book value of these units, as well as a 9.0‑percent return on equity, commencing upon their planned retirement.
In May 2025, before the planned closure of J.H. Campbell, the U.S. Secretary of Energy issued an emergency order under section 202(c) of the Federal Power Act requiring J.H. Campbell to continue operating for 90 days, through August 20, 2025. The order stated that continued operation of J.H. Campbell was required to meet an energy emergency across MISO’s North and Central regions. Consistent with the Federal Power Act and the U.S. Department of Energy regulations, the order authorizes Consumers to obtain cost recovery at FERC. As directed, Consumers continued to make J.H. Campbell available in the MISO market and filed a complaint at FERC seeking a modification of the MISO Tariff to establish a mechanism for recovery and allocation of the cost to comply with this order. In August 2025, FERC issued an order granting Consumers’ requested relief and ordered MISO to file a revised tariff, which MISO filed in September 2025 and is pending at FERC. For additional discussion of this FERC proceeding, see Notes to the Unaudited Consolidated Financial Statements—Note 1, Regulatory Matters.
On August 20, 2025, the U.S. Secretary of Energy issued a second emergency order requiring J.H. Campbell to continue operating for another 90 days, through November 19, 2025. Consumers is complying with the August 2025 emergency order and will seek recovery of its compliance costs at a later date, consistent with rate recovery sought for the May 2025 emergency order.
34

Table of Contents
Following the May 2025 emergency order, several third-party stakeholders, including the Michigan Attorney General, the Organization of MISO States, and a group of environmental and public interest groups, asked the U.S. Department of Energy to reconsider the May 2025 emergency order. In July 2025, after the U.S. Department of Energy took no action on those requests, several parties filed petitions for review of the May 2025 emergency order in federal court. The requests for rehearing were subsequently denied, and similar challenges to the August 2025 order are underway. The U.S. Department of Energy may issue more orders to require the continued operation of J.H. Campbell. While the timing and content of future orders and the outcome of third-party legal challenges are not yet known, Consumers is committed to pursuing cost recovery as provided for under applicable laws, orders, and proceedings.
In order to continue providing controllable sources of electricity to customers while expanding its investment in renewable energy, Consumers purchased the Covert Generating Station, a natural gas-fueled generating facility with 1,200 MW of nameplate capacity, in 2023.
In September 2025, Consumers entered into a PPA with the MCV Partnership for the purchase of up to 1,240 MW of capacity and associated energy from the MCV Facility. The agreement is effective from June 1, 2030 through May 31, 2040. Under the terms of the agreement, Consumers will pay a monthly capacity charge of $5.00 per MWh of available capacity. Energy payments include a fixed component designed to recover non-fuel operating costs and a variable component based on the MCV Partnership’s cost of production for energy delivered to Consumers. The agreement, which is subject to MPSC approval, supports Consumers’ ongoing resource adequacy and energy supply planning efforts.
Consumers has also contracted to purchase 700 MW of capacity from battery storage facilities, which will be located in Michigan’s Lower Peninsula and are expected to be operational by 2028. In an April 2025 report, the MPSC Staff indicated that Consumers’ share of the 2,500‑MW statewide energy storage target established by the 2023 Energy Law is 817 MW.
Under its Clean Energy Plan, Consumers bids new capacity and energy competitively and the actual composition of Consumers’ future portfolio will reflect the results of that competitive bid process. Consumers earns a return equal to its pre-tax weighted-average cost of capital on permanent capital structure on payments made under new clean, renewable, or energy storage PPAs with non-affiliated entities.
Currently, over 15 percent of the electricity Consumers supplies to customers comes from renewable energy sources. Under its renewable energy plan, Consumers has acquired three wind generation projects, totaling 517 MW of nameplate capacity, since 2020; the last of these projects became operational in 2023. The MPSC authorized Consumers to earn a 10.7‑percent return on equity on these projects. The MPSC also approved the execution of a 20‑year PPA under which Consumers will purchase 100 MW of renewable capacity, energy, and renewable energy credits from a solar generating facility that began operations in October 2024.
Consumers’ updates to its renewable energy plan, which were approved by the MPSC in September 2025, include up to 2,800 MW of new, competitively bid wind energy resources and up to 9,000 MW of both purchased and owned solar energy resources. Of the proposed solar energy resources, 1,060 MW will support Consumers’ voluntary green pricing program that provides full-service electric customers with the opportunity to advance the development of renewable energy beyond present state requirements.
35

Table of Contents
Presented in the following illustration is the aggregate renewable capacity that Consumers expects to add to its portfolio through PPAs and owned generation proposed in its existing Clean Energy Plan and the updates to its renewable energy plan:
Consumers continues to evaluate the acquisition of additional capacity from intermittent resources and dispatchable, non‑intermittent clean capacity resources (including battery storage resources). Any resulting contracts are subject to MPSC approval.
Electric Customer Deliveries and Revenue: Consumers’ electric customer deliveries are seasonal and largely dependent on Michigan’s economy. The consumption of electric energy typically increases in the summer months, due primarily to the use of air conditioners and other cooling equipment. In addition, Consumers’ electric rates, which follow a seasonal rate design, are higher in the summer months than in the remaining months of the year. Each year in June, electric residential customers transition to a summer peak time-of-use rate that allows them to take advantage of lower-cost energy during off-peak times during the summer months. Thus, customers can reduce their electric bills by shifting their consumption from on‑peak to off‑peak times.
Over the next five years, Consumers expects weather-normalized electric deliveries to increase compared to 2024. This outlook reflects strong growth in electric demand, offset partially by the effects of energy waste reduction programs. Actual delivery levels will depend on:
•energy conservation measures and results of energy waste reduction programs
•weather fluctuations
•Michigan’s economic conditions, including data center expansion; utilization, expansion, or contraction of large commercial and industrial facilities; economic development; population trends; electric vehicle adoption; and housing activity
Electric ROA: Michigan law allows electric customers in Consumers’ service territory to buy electric generation service from alternative electric suppliers in an aggregate amount capped at 10 percent of
36

Table of Contents
Consumers’ sales, with certain exceptions. At September 30, 2025, electric deliveries under the ROA program were at the 10‑percent limit. Fewer than 300 of Consumers’ electric customers purchased electric generation service under the ROA program.
In 2016, Michigan law established a path to ensure that forward capacity is secured for all electric customers in Michigan, including customers served by alternative electric suppliers under ROA. The law also authorized the MPSC to ensure that alternative electric suppliers have procured enough capacity to cover their anticipated capacity requirements for the four‑year forward period. In 2017, the MPSC issued an order establishing a state reliability mechanism for Consumers. Under this mechanism, if an alternative electric supplier does not demonstrate that it has procured its capacity requirements for the four‑year forward period, its customers will pay a set charge to the utility for capacity that is not provided by the alternative electric supplier.
During 2017, the MPSC issued orders finding that it has statutory authority to determine and implement a local clearing requirement, which requires all electric suppliers to demonstrate that a portion of the capacity used to serve customers is located in the MISO footprint in Michigan’s Lower Peninsula. In 2020, the Michigan Supreme Court affirmed the MPSC’s statutory authority to implement a local clearing requirement on individual electric providers.
In 2020, ABATE and another intervenor filed a complaint against the MPSC in the U.S. District Court for the Eastern District of Michigan challenging the constitutionality of a local clearing requirement. The complaint requests the federal court to issue a permanent injunction prohibiting the MPSC from implementing a local clearing requirement on individual electric providers. In 2023, the U.S. District Court for the Eastern District of Michigan dismissed the complaint. ABATE and the other intervenor filed a claim of appeal of the Eastern District Court’s decision with the U.S. Court of Appeals for the Sixth Circuit.
In January 2025, the Sixth Circuit Court of Appeals issued an opinion finding that the MPSC’s imposition of a local clearing requirement on individual electric suppliers would discriminate against interstate commerce. The Court of Appeals remanded to the District Court for a determination of whether the local clearing requirement discriminated against interstate commerce and whether the MPSC’s regulation survives a strict scrutiny standard, which depends on a determination of whether the local clearing requirement is the only means of achieving the state’s goal of securing reliable energy supply. In January 2025, Consumers filed a petition for rehearing and en banc review with the Sixth Circuit Court of Appeals, requesting the Court to reconsider and reverse the panel’s opinion. In February 2025, the Sixth Circuit Court of Appeals issued an order denying Consumers’ petition for rehearing and en banc review. The case has therefore been remanded to the District Court for the Eastern District of Michigan for consideration of whether the MPSC’s local clearing requirement meets the strict scrutiny standard pursuant to the Court of Appeals’ decision. The remanded proceeding has begun at the Eastern District Court; there is no deadline for decision.
Sale of Hydroelectric Facilities: In September 2025, Consumers signed an agreement to sell its 13 river hydroelectric dams, which are located throughout Michigan, to a non-affiliated company. Additionally, Consumers signed an agreement to purchase power generated by the facilities for 30 years, at a price that reflects the counterparty’s acceptance of the risks and rewards of ownership of the facilities, including FERC licensing obligations. The agreements are contingent upon MPSC and FERC approval, which must be filed within 60 days of signing. Timing of the regulatory review process is uncertain and could extend 12 to 18 months or longer. In Consumers’ most recent electric rate case, the MPSC approved deferred accounting treatment for costs of owning and operating the hydroelectric dams pending and until completion of the transaction. At September 30, 2025, the net book value of the hydroelectric facilities was immaterial.
37

Table of Contents
To ensure necessary staffing at the hydroelectric facilities through the anticipated sale, Consumers has provided current employees at the facilities with a retention incentive program. Subsequently, to ensure continued safe operation of the facilities after the sale, the buyer will offer employment to the current hydroelectric employees for a period of at least a year. The retention incentive benefits are contingent upon MPSC and FERC approval of the sale transaction.
Electric Rate Matters: Rate matters are critical to Consumers’ electric utility business. For additional details on rate matters, see Notes to the Unaudited Consolidated Financial Statements—Note 1, Regulatory Matters and Note 2, Contingencies and Commitments.
MPSC Distribution System Audit: In 2022, the MPSC ordered the state’s two largest electric utilities, including Consumers, to report on their compliance with regulations and past MPSC orders governing the utilities’ response to outages and downed lines. Consumers responded to the MPSC’s order as directed.
Additionally, as directed by the MPSC, the MPSC Staff engaged a third‑party auditor to review all equipment and operations of the two utilities’ distribution systems. In September 2024, the MPSC Staff released the third-party auditor’s final report on its audit of Consumers’ distribution system. The report included several recommendations to improve Consumers’ distribution system and associated processes and procedures. Consumers filed a response to the audit report in November 2024. In June 2025, the MPSC issued an order adopting the audit’s findings and recommendations. Consumers is committed to working with the MPSC to continue improving electric reliability and safety in Michigan.
Performance-based Financial Incentives/Disincentives Mechanism: In February 2025, the MPSC issued an order establishing a mechanism through which the state’s largest electric utilities, including Consumers, could realize up to $10 million each in incentives or penalties annually for meeting or failing to meet reliability benchmarks, beginning in 2026. As directed, Consumers filed proposed company-specific baseline metrics for the performance mechanism in April 2025.
2025 Electric Rate Case: In June 2025, Consumers filed an application with the MPSC seeking a rate increase of $460 million, made up of two components. First, Consumers requested a $436 million annual rate increase, based on a 10.25‑percent authorized return on equity for the projected 12‑month period ending April 30, 2027. The filing requested authority to recover costs related to new infrastructure investment primarily in distribution system reliability. Second, Consumers requested approval of a $24 million surcharge for the recovery of distribution investments made during the 12 months ended February 28, 2025 that exceeded the rate amounts authorized in accordance with previous electric rate orders.
In October 2025, Consumers revised its requested increase to $447 million. Presented in the following table are the components of the revised requested increase in revenue:

In Millions
Projected 12-Month Period Ending April 30 | 2027
Investment in rate base |  | $ | 192 |
Operating and maintenance costs |  | 157 |
Cost of capital |  | 67 |
Sales and other revenue |  | 7 |
Subtotal |  | $ | 423 |
Surcharge |  | 24 |
Total |  | $ | 447 |

The MPSC must issue a final order in this case before or in April 2026.
38

Table of Contents
Retention Incentive Program:Under its Clean Energy Plan, Consumers had planned to retire J.H. Campbell in 2025. In order to ensure necessary staffing at J.H. Campbell through the planned retirement, Consumers implemented a retention incentive program. The terms of and Consumers’ obligations under this program have not been modified as a result of the U.S. Secretary of Energy’s emergency orders requiring the continued operation of J.H. Campbell. Consumers will make final payments due under this retention plan in November 2025. The aggregate cost of the J.H. Campbell program is estimated to be $48 million; Consumers expects to recognize $5 million of retention benefit costs in 2025. The MPSC has approved deferred accounting treatment for these costs; these expenses are deferred as a regulatory asset. Should the U.S. Department of Energy issue additional emergency orders that require the continued operation of J.H. Campbell beyond November 2025, Consumers is prepared to implement additional retention measures to ensure appropriate staffing levels. For additional details on this program, see Notes to the Unaudited Consolidated Financial Statements—Note 12, Exit Activities and Asset Sales. For additional details on the emergency orders, see Notes to the Unaudited Consolidated Financial Statements—Note 1, Regulatory Matters.
Electric Environmental Outlook: Consumers’ electric operations are subject to various federal, state, and local environmental laws and regulations. Consumers estimates that it will incur capital expenditures of $240 million from 2025 through 2029 to continue to comply with RCRA, the Clean Air Act, and numerous other environmental regulations. Consumers expects to recover these costs in customer rates, but cannot guarantee this result. Multiple environmental laws and regulations are subject to litigation. Consumers’ primary environmental compliance focus includes, but is not limited to, the following matters.
Air Quality: Multiple air quality regulations apply, or may apply, to Consumers’ electric utility.
MATS, emission standards for electric generating units published by the EPA based on Section 112 of the Clean Air Act, continue to apply to Consumers. In June 2025, the EPA issued a proposed rule to repeal changes made to the MATS rule in 2024. The company has complied, and continues to comply, with the MATS regulation and both the 2024 and proposed 2025 versions of MATS have minimal impacts on Consumers’ electric generating units. Consumers does not expect MATS to materially impact its environmental strategy.
CSAPR requires Michigan and many other states to improve air quality by reducing power plant emissions that, according to EPA modeling, contribute to ground-level ozone in other downwind states. Since its 2015 effective date, CSAPR has been revised several times. In 2023, the EPA published the Good Neighbor Plan, a revision to CSAPR. This regulation tightens emission allowance budgets for electric generating units in Michigan between 2023 and 2029 and changes the mechanism for allocating such allowances on a year-over-year basis beginning in 2026. In June 2024, the U.S. Supreme Court stayed the Good Neighbor Plan pending judicial review and, as a result, the allowance requirements for Michigan reverted back to the prior effective CSAPR ozone season rule. Regardless of the outcome of this litigation and which version of the rule applies, Consumers expects this regulation will have minimal financial and operational impact in the near and/or long term.
In 2015, the EPA lowered the NAAQS for ozone and made it more difficult to construct or modify power plants and other emission sources in areas of the country that do not meet the ozone standard. As of 2023, three counties in western Michigan have been designated as not meeting the ozone standard. Based on recent data, the EPA reclassified these counties from “moderate” to “serious” nonattainment. None of Consumers’ fossil-fuel-fired generating units are located in these areas.
In March 2024, the EPA published a lower fine particulate matter NAAQS, which will likely result in newly designated nonattainment areas in Michigan starting in 2026. EGLE has proposed nonattainment areas for Kalamazoo and Wayne counties. Consumers does not have any fossil-fuel-fired generating
39

Table of Contents
assets in these counties and therefore does not expect this rule to have significant impacts on its existing assets or its clean energy strategy. Consumers will continue to monitor NAAQS rulemakings and litigation to evaluate potential impacts to its generating assets.
In December 2024, the EPA published a proposal to amend new source performance standards for new, modified, and reconstructed stationary combustion turbines to lower emission limits for NOx. This may impact future gas-fueled, simple-cycle turbine projects. Consumers, in conjunction with industry stakeholder groups, submitted comments on the proposed rule and will continue monitoring this rulemaking.
Consumers continues to evaluate these rules in conjunction with other EPA and EGLE rulemakings, litigation, executive orders, treaties, and congressional actions. This evaluation could result in:
•a change in Consumers’ fuel mix
•changes in the types of generating units Consumers may purchase or build in the future
•changes in how certain units are operated, including the installation of additional emission control equipment
•the retirement, mothballing, extended operation, or repowering with an alternative fuel of some of Consumers’ generating units
•changes in Consumers’ environmental compliance costs
•the purchase or sale of emission allowances
Greenhouse Gases: There have been numerous legislative, executive, and regulatory initiatives at the state, regional, national, and international levels that involve the potential regulation and reporting of greenhouse gases. Consumers continues to monitor and comment on these initiatives, as appropriate.
In September 2025, the EPA proposed a rule to reconsider the Greenhouse Gas Reporting Program by eliminating the reporting obligations from numerous emission sources, including Consumers’ electric generation sites and distribution equipment. Reporting of carbon dioxide to the EPA, however, will continue for sources subject to the Clean Air Act Acid Rain Program, which includes Consumers’ fossil-fuel-fired electric generation. This change could result in inconsistent approaches in greenhouse gas accounting for industrial sources.
In April 2024, the EPA finalized its rule under Section 111 of the Clean Air Act to address greenhouse gas emissions from new combustion turbine electric generating units and existing coal-, gas-, and oil-fueled steam electric generating units. These rules do not address existing combustion turbine electric generating units. In June 2025, the EPA issued a proposed rule containing two different pathways to rescind these requirements. Consumers does not expect these proposed changes will have a significant impact on its existing gas- and oil-fueled steam electric generating assets. Consumers will continue to follow the EPA rules that address greenhouse gas emissions and will continue to evaluate potential impacts to its operations.
In 2020, Michigan’s Governor signed an executive order creating the Michigan Healthy Climate Plan, which outlines goals for Michigan to achieve economy-wide net-zero greenhouse gas emissions and to be carbon neutral by 2050. The executive order aims for a 28‑percent reduction below 2005 levels of greenhouse gas emissions by 2025. Consumers has already surpassed the 28‑percent reduction milestone for its owned electric generation. The 2023 Energy Law codifies much of the Governor’s goals. For additional details on the 2023 Energy Law, see the Planet section of the Executive Overview.
Increased frequency or intensity of severe or extreme weather events, including those due to climate change, could materially impact Consumers’ facilities, energy sales, and results of operations. Consumers is unable to predict these events; however, Consumers evaluates the potential physical impacts of climate
40

Table of Contents
change on its operations, including increased frequency or intensity of storm activity; increased precipitation; increased temperature; and changes in lake and river levels. Consumers released a report addressing the physical risks of climate change on its infrastructure in 2022. Consumers is taking steps to mitigate these risks as appropriate.
While Consumers cannot predict the outcome of changes in U.S. policy or of other legislative, executive, or regulatory initiatives involving the potential regulation or reporting of greenhouse gases, it intends to move forward with its Clean Energy Plan, its present net-zero goals, and its emphasis on reliable and resilient electric supply. Litigation, international treaties, executive orders, federal laws and regulations (including regulations by the EPA), and state laws and regulations, if enacted or ratified, could ultimately impact Consumers. Consumers may be required to:
•replace equipment
•install additional emission control equipment
•purchase emission allowances or credits (including potential greenhouse gas offset credits)
•curtail operations or modify existing facility retirement schedules
•arrange for alternative sources of supply
•purchase or build facilities that generate fewer emissions
•mothball, sell, or retire facilities that generate certain emissions
•pursue energy efficiency or demand response measures more swiftly
•take other steps to manage, sequester, or lower the emission of greenhouse gases
Although associated capital or operating costs relating to greenhouse gas regulation or legislation could be material and cost recovery cannot be assured, Consumers expects to recover these costs in rates consistent with the recovery of other reasonable costs of complying with environmental laws and regulations.
CCRs: In 2015, the EPA published a rule regulating CCRs under RCRA. This rule adopts minimum standards for the disposal of non‑hazardous CCRs in CCR landfills and surface impoundments and criteria for the beneficial use of CCRs. The rule also sets out conditions under which some CCR units would be forced to cease receiving CCRs and related process water and to initiate closure. Due to continued litigation, many aspects of the rule have been remanded to the EPA, resulting in more proposed and final rules.
In May 2024, the EPA finalized a rule regulating legacy CCR surface impoundments and CCR management units in response to litigation that exempted inactive impoundments at inactive facilities from the 2015 CCR rule. The new rule adopts minimum standards for impoundments at electric generating facilities that became inactive before the 2015 CCR rule’s effective date. During 2024, owners and operators were required to assess whether an inactive facility contains a legacy surface impoundment and then, for identified locations, proceed with the compliance schedule. Additionally, the EPA established groundwater monitoring, corrective action, closure, and post-closure care requirements for CCR surface impoundments and landfills closed prior to the effective date of the 2015 CCR rule, but that do not meet the closure technical and performance standards of the May 2024 rule. These include inactive CCR landfills that were previously exempted from regulation but that are now considered CCR management units. Owners are required to conduct an evaluation at active facilities or any inactive facilities with at least one legacy impoundment to identify CCR management units and determine an appropriate course of action (closure, groundwater treatment, etc.) for each identified unit according to established compliance milestone schedules. A direct final rule extending the compliance milestone schedule was issued and then withdrawn by the EPA; the rule has since been republished for notice and comment. This extension does not have a material impact on Consumers’ compliance strategy.
41

Table of Contents
Separately, Congress passed legislation in 2016 allowing participating states to develop permitting programs for CCRs under RCRA Subtitle D. The EPA was granted authority to review these permitting programs to determine if permits issued under the proposed program would be as protective as the federal rule. Once approved, permits issued from an authorized state would serve as the basis for compliance, replacing the requirement to self-certify each aspect of the 2015 CCR rule.
Consumers, with agreement from EGLE, completed the work necessary to initiate closure by excavating CCRs or placing a final cover over each of its relevant CCR units prior to the closure initiation deadline set forth in the 2015 CCR rule. Consumers has historically been authorized to recover in electric rates costs related to coal ash disposal sites that supported power generation. Consumers completed an assessment of inactive facilities as required by the 2024 CCR rule, and did not identify any legacy impoundments. Consumers is continuing evaluations related to CCR management units and 2024 CCR rule impacts on the state permit program.
Water: Multiple water-related regulations apply, or may apply, to Consumers.
The EPA regulates cooling water intake systems of existing electric generating plants under Section 316(b) of the Clean Water Act. The rules seek to reduce alleged harmful impacts on aquatic organisms, such as fish. In 2018, Consumers submitted to EGLE studies and recommended plans to comply with Section 316(b) for its coal-fueled units but has not yet received final approval.
The EPA also regulates the discharge of wastewater through its effluent limitation guidelines for steam electric generating plants. In 2020, the EPA revised previous guidelines related to the discharge of certain wastewater, but allowed for extension of the compliance deadline from the end of 2023 to the end of 2025, upon approval by EGLE through the NPDES permitting process. Consumers received such an extension for J.H. Campbell. In April 2024, the EPA released a final rule updating its effluent limitation guidelines for existing coal-fueled units. This rule regulates additional wastewater streams previously not regulated, including combustion residual leachate and legacy wastewater. Consumers has submitted timely NPDES permit applications and will be working with EGLE to incorporate applicable provisions during the permit renewal process.
Many of Consumers’ facilities maintain NPDES permits, which are vital to the facilities’ operations. Consumers applies for renewal of these permits every five years. Failure of EGLE to renew any NPDES permit, a successful appeal against a permit, a change in the interpretation or scope of NPDES permitting, or onerous terms contained in a permit could have a significant detrimental effect on the operations of a facility.
Protected Wildlife: Multiple regulations apply, or may apply, to Consumers relating to protected species and habitats.
Statutes like the federal Endangered Species Act, the Migratory Bird Treaty Act, and the Bald and Golden Eagle Protection Act of 1940 and changes to permitting may impact operations at Consumers’ facilities. In February 2024, the U.S. Fish and Wildlife Service published a final rule providing for bald eagle general permits for qualifying wind farms and electric distribution systems. Consumers has received, or is pursuing, bald eagle general permits for all its wind farms. While any resulting permitting and monitoring fees and/or restrictions on operations could impact Consumers’ existing and future operations, Consumers does not expect any material changes to its environmental strategy or Clean Energy Plan as a result of this rule.
Additionally, Consumers regularly monitors proposed changes to the listing status of several species within its operational area. A change in species listed under the Endangered Species Act, or under
42

Table of Contents
Michigan’s equivalent law, may impact Consumers’ costs to mitigate its impact on protected species and habitats at certain existing facilities as well as siting choices for new facilities.
Other Matters: Other electric environmental matters could have a material impact on Consumers’ outlook. For additional details on other electric environmental matters, see Notes to the Unaudited Consolidated Financial Statements—Note 2, Contingencies and Commitments—Consumers Electric Utility Contingencies—Electric Environmental Matters.
Consumers Gas Utility Outlook and Uncertainties
Gas Deliveries: Consumers’ gas customer deliveries are seasonal. The peak demand for natural gas occurs in the winter due to colder temperatures and the resulting use of natural gas as heating fuel.
Over the next five years, Consumers expects weather-normalized gas deliveries to remain stable relative to 2024. This outlook reflects modest growth in gas demand, offset by the effects of energy waste reduction programs. Actual delivery levels will depend on:
•weather fluctuations
•use by power producers
•availability and development of renewable energy sources
•gas price changes
•Michigan’s economic conditions, including population trends and housing activity
•the price or demand of competing energy sources or fuels
•energy efficiency and conservation impacts
Gas Rate Matters: Rate matters are critical to Consumers’ gas utility business. For additional details on rate matters, see Notes to the Unaudited Consolidated Financial Statements—Note 1, Regulatory Matters and Note 2, Contingencies and Commitments.
2024 Gas Rate Case: In December 2024, Consumers filed an application with the MPSC seeking an annual rate increase of $248 million based on a 10.25‑percent authorized return on equity for the projected 12‑month period ending October 31, 2026. In July 2025, Consumers revised its requested increase to $217 million. In September 2025, the MPSC issued an order authorizing an annual rate increase of $157.5 million, based on a 9.80‑percent authorized return on equity. The new rates become effective in November 2025.
Gas Pipeline and Storage Integrity and Safety: Consumers’ gas operations are governed by federal and state pipeline safety rules, and there are robust processes and procedures in place to maintain compliance with these regulations. The U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration has published various rules that revise federal safety standards for gas transmission pipelines and underground storage facilities. Consumers has implemented measures to achieve compliance with the revised rules. There are also proposed rules expanding requirements for gas distribution systems and leak detection and repair, although these rules are subject to reconsideration by the current administration. Under the proposed rules, Consumers will incur increased capital and increased operating and maintenance costs to install and remediate pipelines and to expand inspections, maintenance, and monitoring of existing pipelines and storage facilities.
Although associated capital or operating and maintenance costs relating to these regulations could be material and cost recovery cannot be assured, Consumers expects to recover such costs in rates consistent with the recovery of other reasonable costs of complying with laws and regulations.
43

Table of Contents
Gas Environmental Outlook: Consumers expects to incur response activity costs at a number of sites, including 23 former MGP sites. For additional details, see Notes to the Unaudited Consolidated Financial Statements—Note 2, Contingencies and Commitments—Consumers Gas Utility Contingencies.
Consumers’ gas operations are subject to various federal, state, and local environmental laws and regulations. Multiple environmental laws and regulations are subject to litigation. Consumers’ primary environmental compliance focus includes, but is not limited to, the following matters.
Air Quality: Multiple air quality regulations apply, or may apply, to Consumers’ gas utility.
In 2015, the EPA lowered the NAAQS for ozone and made it more difficult to construct or modify natural gas compressor stations and other emission sources in areas of the country that do not meet the ozone standard. As of 2023, three counties in western Michigan have been designated as not meeting the ozone standard. Based on recent data, the EPA reclassified these counties from “moderate” to “serious” nonattainment, which has more stringent requirements. One of Consumers’ compressor stations is in a serious ozone nonattainment area. Consequently, Consumers has initiated plans to retrofit equipment at this compressor station to lower NOx emissions. Consumers will continue to monitor NAAQS rulemakings and evaluate potential impacts to its compressor stations and other applicable natural gas storage and delivery assets.
In March 2024, the EPA published a lower fine particulate matter NAAQS, which will likely result in newly designated nonattainment areas in Michigan starting in 2026. EGLE has proposed nonattainment areas for Kalamazoo and Wayne counties. Consumers has one compressor station located in Wayne County and will continue to monitor NAAQS rulemakings and litigation to evaluate potential impacts to the natural gas compressor station assets.
Greenhouse Gases: Some interest exists at the various levels of government in regulating greenhouse gases or their sources. Future regulations, if adopted, may involve requirements to reduce methane emissions from Consumers’ gas utility operations and carbon dioxide emissions from customer use of natural gas. Consumers will continue to monitor such potential rules for impacts.
In September 2025, the EPA proposed a rule to reconsider the Greenhouse Gas Reporting Program by removing the natural gas distribution segment from the reporting obligations under the petroleum and natural gas source category, and proposed to delay the reporting obligations until 2034 for the remaining sources in this category. This change could result in inconsistent approaches in greenhouse gas accounting for industrial sources.
In 2020, Michigan’s Governor signed an executive order creating the Michigan Healthy Climate Plan, which outlines goals for Michigan to achieve economy-wide net-zero greenhouse gas emissions and to be carbon neutral by 2050. The executive order aims for a 28‑percent reduction below 2005 levels of greenhouse gas emissions by 2025. For additional details on the executive order, see Consumers Electric Utility Outlook and Uncertainties—Electric Environmental Outlook.
Consumers is making voluntary efforts to reduce its gas utility’s methane emissions. Under its Methane Reduction Plan, Consumers has set a goal of net-zero methane emissions from its natural gas delivery system by 2030. Consumers plans to reduce methane emissions from its system by about 80 percent, from 2012 baseline levels, by accelerating the replacement of aging pipe, rehabilitating or retiring outdated infrastructure, and adopting new technologies and practices. The remaining emissions will likely be offset through clean fuel alternatives or nature-based carbon removal pathways. To date, Consumers has reduced methane emissions by nearly 30 percent.
44

Table of Contents
In 2022, Consumers also announced a net-zero greenhouse gas emissions target for its entire natural gas system by 2050. This includes suppliers and customers, and has an interim goal of reducing customer emissions by 25 percent by 2035. Consumers’ Natural Gas Delivery Plan, a rolling ten‑year investment plan to deliver safe, reliable, clean, and affordable natural gas to customers, outlines ways in which Consumers can make early progress toward these goals in a cost-effective manner, including energy waste reduction, carbon offsets, and renewable natural gas supply.
Consumers has already initiated work in these key areas by continuing to expand its energy waste reduction targets and by offering gas customers the ability to offset their carbon footprint associated with natural gas use by purchasing renewable natural gas and/or carbon credits associated with Michigan forest preservation. Consumers has two renewable natural gas facilities under construction scheduled for commercial operation in 2026 and is monitoring regulatory developments and market conditions closely as part of its ongoing evaluation of the projects. Consumers is evaluating and monitoring newer technologies to determine their role in achieving Consumers’ interim and long-term net-zero goals, including biofuels, geothermal, synthetic methane, carbon capture sequestration systems, and other innovative technologies.
NorthStar Clean Energy Outlook and Uncertainties
CMS Energy’s primary focus with respect to its NorthStar Clean Energy businesses is to maximize the value of generating assets representing 1,655 MW of capacity, and to pursue opportunities for the development of renewable generation projects.
Trends, uncertainties, and other matters related to NorthStar Clean Energy that could have a material impact on CMS Energy’s consolidated income, cash flows, or financial position include:
•investment in and financial benefits received from renewable energy and energy storage projects, including changes to tax and trade policy
•delays or difficulties in financing, constructing, and developing projects, including those arising from the performance of contractors, suppliers, or other counterparties
•changes in energy, capacity, and other commodity prices
•severe weather events and climate change associated with increasing levels of greenhouse gases
•changes in various environmental laws, regulations, principles, or practices, or in their interpretation
•indemnity obligations assumed in connection with ownership interests in facilities that involve tax equity financing
•representations, warranties, and indemnities provided in connection with sales of assets
•delays or difficulties in obtaining environmental permits
For additional details regarding NorthStar Clean Energy’s uncertainties, see Notes to the Unaudited Consolidated Financial Statements—Note 2, Contingencies and Commitments—Guarantees.
NorthStar Clean Energy Environmental Outlook: NorthStar Clean Energy’s operations are subject to various federal, state, and local environmental laws and regulations. Multiple environmental laws and regulations are subject to litigation. NorthStar Clean Energy’s primary environmental compliance focus includes, but is not limited to, the following matters.
CSAPR requires Michigan and many other states to improve air quality by reducing power plant emissions that, according to EPA modeling, contribute to ground-level ozone in other downwind states. Since its 2015 effective date, CSAPR has been revised several times. In 2023, the EPA published the Good Neighbor Plan, a revision to CSAPR. This regulation tightens emission allowance budgets for electric generating units in Michigan between 2023 and 2029 and changes the mechanism for allocating
45

Table of Contents
such allowances on a year-over-year basis beginning in 2026. In June 2024, the U.S. Supreme Court stayed the Good Neighbor Plan pending judicial review and, as a result, the allowance requirements for Michigan reverted back to the prior effective CSAPR ozone season rule. Under the 2023 revision, NorthStar Clean Energy could incur increased costs to purchase allowances or retrofit equipment.
In March 2024, the EPA published a lower fine particulate matter NAAQS, which will likely result in newly designated nonattainment areas in Michigan starting in 2026. EGLE has proposed nonattainment areas for Kalamazoo and Wayne counties. NorthStar Clean Energy has two fossil-fuel-fired generating units in these counties and therefore will continue to monitor NAAQS rulemaking and litigation to evaluate potential impacts to its generating assets.
In December 2024, the EPA published a proposal to amend new source performance standards for new, modified, and reconstructed stationary combustion turbines to lower emission limits for NOx. This may impact future gas-fueled, simple-cycle turbine projects. NorthStar Clean Energy will monitor this rulemaking.
For additional details regarding the ozone NAAQS, see Consumers Electric Utility Outlook and Uncertainties—Electric Environmental Outlook.
In September 2025, the EPA proposed a rule to reconsider the Greenhouse Gas Reporting Program by eliminating the reporting obligations from numerous emission sources. Reporting of carbon dioxide to the EPA, however, will continue for sources subject to the Clean Air Act Acid Rain Program. This change could result in inconsistent approaches in greenhouse gas accounting for industrial sources.
In April 2024, the EPA finalized its rule under Section 111 of the Clean Air Act to address greenhouse gas emissions from new combustion turbine electric generating units and existing coal-, gas-, and oil-fueled steam electric generating units. These rules do not address existing combustion turbine electric generating units. In June 2025, the EPA issued a proposed rule containing two different pathways to rescind these requirements. Neither pathway impacts NorthStar Clean Energy’s existing facilities. NorthStar Clean Energy will continue to follow the EPA rules that address greenhouse gas emissions and will continue to evaluate potential impacts to its operations.
Many of NorthStar Clean Energy’s facilities maintain NPDES permits, which are vital to the facilities’ operations. NorthStar Clean Energy applies for renewal of these permits every five years. Failure of EGLE to renew any NPDES permit, a successful appeal against a permit, a change in the interpretation or scope of NPDES permitting, or onerous terms contained in a permit could have a significant detrimental effect on the operations of a facility.
Other Outlook and Uncertainties
Union Contract: The UWUA represents Consumers’ operating, maintenance, construction, and customer contact center employees. In May 2025, Consumers and the UWUA ratified a new five-year contract for its operating, maintenance, and construction bargaining unit. In July 2025, Consumers and the UWUA ratified a new five-year contract with customer contact center employees. In September 2025, Consumers and the United Steelworkers labor union ratified a new five-year contract for its Zeeland plant bargaining unit.
Tax Legislation: CMS Energy and Consumers are subject to changing tax laws. In July 2025, President Trump signed into law the OBBBA. The legislation allows for the immediate expensing of domestic research and development costs and includes changes to clean energy tax credits enacted by the Inflation Reduction Act of 2022. While the OBBBA restores, and makes permanent, the 100‑percent bonus depreciation deduction, it also retains a provision that allows utilities to take a full deduction of
46

Table of Contents
interest expense in lieu of 100‑percent bonus depreciation. Based on guidance available to date, CMS Energy and Consumers evaluated the provisions of the OBBBA and concluded that the legislation is not expected to have a material impact on their respective financial statements. This conclusion is subject to change as additional guidance or interpretations become available.
Litigation: CMS Energy, Consumers, and certain of their subsidiaries are named as parties in various litigation matters, as well as in administrative proceedings before various courts and governmental agencies, arising in the ordinary course of business. For additional details regarding certain legal matters, see Notes to the Unaudited Consolidated Financial Statements—Note 1, Regulatory Matters and Note 2, Contingencies and Commitments.
New Accounting Standards
There are no new accounting standards issued but not yet effective that are expected to have a material impact on CMS Energy’s or Consumers’ consolidated financial statements.
47

Table of Contents
CMS Energy Corporation
Consolidated Statements of Income (Unaudited)

In Millions, Except Per Share Amounts
| Three Months Ended | Nine Months Ended
September 30 | 2025 | 2024 |  | 2025 | 2024 |
Operating Revenue |  | $ | 2,021 |  |  | $ | 1,743 |  |  |  | $ | 6,306 |  |  | $ | 5,526 |  |  |
Operating Expenses |  |  |  |  |  |  |  |  |  |  |
Fuel for electric generation |  | 153 |  |  | 179 |  |  |  | 504 |  |  | 449 |  |  |
Purchased and interchange power |  | 513 |  |  | 362 |  |  |  | 1,332 |  |  | 1,025 |  |  |
Purchased power – related parties |  | 21 |  |  | 19 |  |  |  | 69 |  |  | 53 |  |  |
Cost of gas sold |  | 42 |  |  | 32 |  |  |  | 549 |  |  | 449 |  |  |
Maintenance and other operating expenses |  | 416 |  |  | 412 |  |  |  | 1,218 |  |  | 1,218 |  |  |
Depreciation and amortization |  | 288 |  |  | 273 |  |  |  | 964 |  |  | 914 |  |  |
General taxes |  | 107 |  |  | 99 |  |  |  | 378 |  |  | 356 |  |  |
Total operating expenses |  | 1,540 |  |  | 1,376 |  |  |  | 5,014 |  |  | 4,464 |  |  |
Operating Income |  | 481 |  |  | 367 |  |  |  | 1,292 |  |  | 1,062 |  |  |
Other Income (Expense) |  |  |  |  |  |  |  |  |  |  |
Non-operating retirement benefits, net |  | 48 |  |  | 42 |  |  |  | 137 |  |  | 127 |  |  |
Other income |  | 19 |  |  | 46 |  |  |  | 128 |  |  | 167 |  |  |
Other expense |  | (5) |  |  | (4) |  |  |  | (16) |  |  | (11) |  |  |
Total other income |  | 62 |  |  | 84 |  |  |  | 249 |  |  | 283 |  |  |
Interest Charges |  |  |  |  |  |  |  |  |  |  |
Interest on long-term debt |  | 204 |  |  | 176 |  |  |  | 590 |  |  | 519 |  |  |
Interest expense – related parties |  | 2 |  |  | 3 |  |  |  | 8 |  |  | 9 |  |  |
Other interest expense |  | — |  |  | 4 |  |  |  | (1) |  |  | 11 |  |  |
Allowance for borrowed funds used during construction |  | (3) |  |  | (5) |  |  |  | (9) |  |  | (11) |  |  |
Total interest charges |  | 203 |  |  | 178 |  |  |  | 588 |  |  | 528 |  |  |
Income Before Income Taxes |  | 340 |  |  | 273 |  |  |  | 953 |  |  | 817 |  |  |
Income Tax Expense |  | 68 |  |  | 26 |  |  |  | 193 |  |  | 125 |  |  |
Net Income |  | 272 |  |  | 247 |  |  |  | 760 |  |  | 692 |  |  |
Loss Attributable to Noncontrolling Interests |  | (5) |  |  | (6) |  |  |  | (22) |  |  | (46) |  |  |
Net Income Attributable to CMS Energy |  | 277 |  |  | 253 |  |  |  | 782 |  |  | 738 |  |  |
Preferred Stock Dividends |  | 2 |  |  | 2 |  |  |  | 7 |  |  | 7 |  |  |
Net Income Available to Common Stockholders |  | $ | 275 |  |  | $ | 251 |  |  |  | $ | 775 |  |  | $ | 731 |  |  |
Basic Earnings Per Average Common Share |  | $ | 0.92 |  |  | $ | 0.84 |  |  |  | $ | 2.59 |  |  | $ | 2.45 |  |  |
Diluted Earnings Per Average Common Share |  | $ | 0.92 |  |  | $ | 0.84 |  |  |  | $ | 2.59 |  |  | $ | 2.45 |  |  |

The accompanying notes are an integral part of these statements.
48

Table of Contents
CMS Energy Corporation
Consolidated Statements of Comprehensive Income (Unaudited)

In Millions
| Three Months Ended |  | Nine Months Ended
September 30 | 2025 | 2024 |  | 2025 | 2024 |
Net Income |  | $ | 272 |  |  | $ | 247 |  |  |  | $ | 760 |  |  | $ | 692 |  |  |
Retirement Benefits Liability |  |  |  |  |  |  |  |  |  |  |
Amortization of net actuarial loss, net of tax of $—, $1, $—, and $1 |  | 1 |  |  | — |  |  |  | 1 |  |  | 1 |  |  |
Amortization of prior service credit, net of tax of $— for all periods |  | (1) |  |  | — |  |  |  | (1) |  |  | — |  |  |
Other Comprehensive Income |  | — |  |  | — |  |  |  | — |  |  | 1 |  |  |
Comprehensive Income |  | 272 |  |  | 247 |  |  |  | 760 |  |  | 693 |  |  |
Comprehensive Loss Attributable to Noncontrolling Interests |  | (5) |  |  | (6) |  |  |  | (22) |  |  | (46) |  |  |
Comprehensive Income Attributable to CMS Energy |  | $ | 277 |  |  | $ | 253 |  |  |  | $ | 782 |  |  | $ | 739 |  |  |

The accompanying notes are an integral part of these statements.
49

Table of Contents
(This page intentionally left blank)
50

Table of Contents
CMS Energy Corporation
Consolidated Statements of Cash Flows (Unaudited)

In Millions
Nine Months Ended September 30 | 2025 | 2024 |
Cash Flows from Operating Activities |  |  |  |  |  |
Net income |  | $ | 760 |  |  | $ | 692 |  |  |
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |  |  |
Depreciation and amortization |  | 964 |  |  | 914 |  |  |
Deferred income taxes and investment tax credits |  | 171 |  |  | 103 |  |  |
Other non‑cash operating activities and reconciling adjustments |  | (181) |  |  | (152) |  |  |
Changes in assets and liabilities |  |  |  |  |  |
Accounts receivable and accrued revenue |  | 114 |  |  | 185 |  |  |
Inventories |  | (134) |  |  | 51 |  |  |
Accounts payable and accrued rate refunds |  | (6) |  |  | 15 |  |  |
Other current assets and liabilities |  | 103 |  |  | (3) |  |  |
Other non‑current assets and liabilities |  | (34) |  |  | 162 |  |  |
Net cash provided by operating activities |  | 1,757 |  |  | 1,967 |  |  |
Cash Flows from Investing Activities |  |  |  |  |  |
Capital expenditures (excludes assets placed under finance lease) |  | (2,750) |  |  | (2,100) |  |  |
Proceeds from sale of ASP business |  | — |  |  | 124 |  |  |
Cost to retire property and other investing activities |  | (176) |  |  | (125) |  |  |
Net cash used in investing activities |  | (2,926) |  |  | (2,101) |  |  |
Cash Flows from Financing Activities |  |  |  |  |  |
Proceeds from issuance of debt |  | 2,511 |  |  | 1,447 |  |  |
Retirement of debt |  | (884) |  |  | (789) |  |  |
Decrease in notes payable |  | (65) |  |  | (93) |  |  |
Issuance of common stock |  | 373 |  |  | 283 |  |  |
Payment of dividends on common and preferred stock |  | (496) |  |  | (470) |  |  |
Proceeds from the sale of membership interests in VIEs |  | 44 |  |  | — |  |  |
Other financing costs |  | (60) |  |  | (25) |  |  |
Net cash provided by financing activities |  | 1,423 |  |  | 353 |  |  |
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts |  | 254 |  |  | 219 |  |  |
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period |  | 178 |  |  | 248 |  |  |
Cash and Cash Equivalents, Including Restricted Amounts, End of Period |  | $ | 432 |  |  | $ | 467 |  |  |
Other Non‑cash Investing and Financing Activities
Non‑cash transactions |  |  |  |  |  |
Capital expenditures not paid |  | $ | 586 |  |  | $ | 387 |  |  |

The accompanying notes are an integral part of these statements.
51

Table of Contents
CMS Energy Corporation
Consolidated Balance Sheets (Unaudited)

ASSETS
In Millions
| September 30 2025 | December 31 2024
Current Assets |  |  |  |
Cash and cash equivalents |  | $ | 362 |  |  | $ | 103 |
Restricted cash and cash equivalents |  | 70 |  |  | 75 |
Accounts receivable and accrued revenue, less allowance of $28 in 2025 and $23 in 2024 |  | 922 |  |  | 1,049 |
Accounts receivable – related parties |  | 12 |  |  | 14 |
Inventories at average cost |  |  |  |
Gas in underground storage |  | 566 |  |  | 435 |
Materials and supplies |  | 307 |  |  | 299 |
Generating plant fuel stock |  | 30 |  |  | 35 |
Deferred property taxes |  | 294 |  |  | 448 |
Regulatory assets |  | 84 |  |  | 229 |
Prepayments and other current assets |  | 98 |  |  | 103 |
Total current assets |  | 2,745 |  |  | 2,790 |
Plant, Property, and Equipment |  |  |  |
Plant, property, and equipment, gross |  | 36,583 |  |  | 34,932 |
Less accumulated depreciation and amortization |  | 10,051 |  |  | 9,569 |
Plant, property, and equipment, net |  | 26,532 |  |  | 25,363 |
Construction work in progress |  | 3,158 |  |  | 2,098 |
Total plant, property, and equipment |  | 29,690 |  |  | 27,461 |
Other Non‑current Assets |  |  |  |
Regulatory assets |  | 3,545 |  |  | 3,569 |
Accounts receivable |  | 18 |  |  | 20 |
Investments |  | 64 |  |  | 69 |
Postretirement benefits |  | 1,744 |  |  | 1,627 |
Other |  | 202 |  |  | 384 |
Total other non‑current assets |  | 5,573 |  |  | 5,669 |
Total Assets |  | $ | 38,008 |  |  | $ | 35,920 |

52

Table of Contents

LIABILITIES AND EQUITY
In Millions
| September 30 2025 | December 31 2024
Current Liabilities |  |  |  |
Current portion of long-term debt and finance leases |  | $ | 1,162 |  |  | $ | 1,195 |
Notes payable |  | — |  |  | 65 |
Accounts payable |  | 1,141 |  |  | 1,085 |
Accounts payable – related parties |  | 8 |  |  | 8 |
Accrued rate refunds |  | 9 |  |  | 38 |
Accrued interest |  | 204 |  |  | 156 |
Accrued taxes |  | 200 |  |  | 654 |
Regulatory liabilities |  | 89 |  |  | 111 |
Other current liabilities |  | 239 |  |  | 209 |
Total current liabilities |  | 3,052 |  |  | 3,521 |
Non‑current Liabilities |  |  |  |
Long-term debt |  | 16,774 |  |  | 15,194 |
Non-current portion of finance leases |  | 137 |  |  | 112 |
Regulatory liabilities |  | 4,104 |  |  | 4,067 |
Postretirement benefits |  | 92 |  |  | 96 |
Asset retirement obligations |  | 731 |  |  | 728 |
Deferred investment tax credit |  | 119 |  |  | 122 |
Deferred income taxes |  | 3,172 |  |  | 2,925 |
Other non‑current liabilities |  | 396 |  |  | 407 |
Total non‑current liabilities |  | 25,525 |  |  | 23,651 |
Commitments and Contingencies (Notes 1 and 2) |  |  |  |
Equity |  |  |  |
Common stockholders’ equity |  |  |  |
Common stock, authorized 350.0 shares in both periods; outstanding 304.3 shares in 2025 and 298.8 shares in 2024 |  | 3 |  |  | 3 |
Other paid-in capital |  | 6,355 |  |  | 6,009 |
Accumulated other comprehensive loss |  | (41) |  |  | (41) |
Retained earnings |  | 2,323 |  |  | 2,035 |
Total common stockholders’ equity |  | 8,640 |  |  | 8,006 |
Cumulative redeemable perpetual preferred stock, Series C, authorized 9.2 depositary shares; outstanding 9.2 depositary shares in both periods |  | 224 |  |  | 224 |
Total stockholders’ equity |  | 8,864 |  |  | 8,230 |
Noncontrolling interests |  | 567 |  |  | 518 |
Total equity |  | 9,431 |  |  | 8,748 |
Total Liabilities and Equity |  | $ | 38,008 |  |  | $ | 35,920 |

The accompanying notes are an integral part of these statements.
53

Table of Contents
CMS Energy Corporation
Consolidated Statements of Changes in Equity (Unaudited)

In Millions, Except Per Share Amounts
|  |  |  | Three Months Ended |  | Nine Months Ended
September 30 |  |  |  | 2025 | 2024 |  | 2025 | 2024 |
Total Equity at Beginning of Period |  | $ | 8,971 |  |  | $ | 8,541 |  |  |  | $ | 8,748 |  |  | $ | 8,125 |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |
At beginning and end of period |  | 3 |  |  | 3 |  |  |  | 3 |  |  | 3 |  |  |
Other Paid-in Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |
At beginning of period |  |  |  |  | 5,998 |  |  | 5,991 |  |  |  | 6,009 |  |  | 5,705 |  |  |
Common stock issued |  |  |  |  | 358 |  |  | 10 |  |  |  | 393 |  |  | 307 |  |  |
Common stock repurchased |  |  |  |  | (1) |  |  | — |  |  |  | (13) |  |  | (11) |  |  |
Adjustment for sale of membership interests in VIEs |  |  |  |  | — |  |  | — |  |  |  | (34) |  |  | — |  |  |
At end of period |  |  |  |  | 6,355 |  |  | 6,001 |  |  |  | 6,355 |  |  | 6,001 |  |  |
Accumulated Other Comprehensive Loss |  |  |  |  |  |  |  |  |  |  |
Retirement benefits liability |  |  |  |  |  |  |  |  |  |  |
At beginning of period |  | (41) |  |  | (45) |  |  |  | (41) |  |  | (46) |  |  |
Amortization of net actuarial loss |  | 1 |  |  | — |  |  |  | 1 |  |  | 1 |  |  |
Amortization of prior service credit |  | (1) |  |  | — |  |  |  | (1) |  |  | — |  |  |
At end of period |  | (41) |  |  | (45) |  |  |  | (41) |  |  | (45) |  |  |
Retained Earnings |  |  |  |  |  |  |  |  |  |  |
At beginning of period |  | 2,210 |  |  | 1,830 |  |  |  | 2,035 |  |  | 1,658 |  |  |
Net income attributable to CMS Energy |  | 277 |  |  | 253 |  |  |  | 782 |  |  | 738 |  |  |
Dividends declared on common stock |  | (162) |  |  | (153) |  |  |  | (487) |  |  | (461) |  |  |
Dividends declared on preferred stock |  | (2) |  |  | (2) |  |  |  | (7) |  |  | (7) |  |  |
At end of period |  | 2,323 |  |  | 1,928 |  |  |  | 2,323 |  |  | 1,928 |  |  |
Cumulative Redeemable Perpetual Preferred Stock, Series C |  |  |  |  |  |  |  |  |  |  |
At beginning and end of period |  | 224 |  |  | 224 |  |  |  | 224 |  |  | 224 |  |  |
Noncontrolling Interests |  |  |  |  |  |  |  |  |  |  |
At beginning of period |  | 577 |  |  | 538 |  |  |  | 518 |  |  | 581 |  |  |
Sale of membership interests in VIEs |  |  |  |  | — |  |  | — |  |  |  | 78 |  |  | — |  |  |
Loss attributable to noncontrolling interests |  | (5) |  |  | (6) |  |  |  | (22) |  |  | (46) |  |  |
Other changes in noncontrolling interests |  | (5) |  |  | (2) |  |  |  | (7) |  |  | (5) |  |  |
At end of period |  | 567 |  |  | 530 |  |  |  | 567 |  |  | 530 |  |  |
Total Equity at End of Period |  | $ | 9,431 |  |  | $ | 8,641 |  |  |  | $ | 9,431 |  |  | $ | 8,641 |  |  |
Dividends declared per common share |  | $ | 0.5425 |  |  | $ | 0.5150 |  |  |  | $ | 1.6275 |  |  | $ | 1.5450 |  |  |
Dividends declared per preferred stock Series C depositary share |  | $ | 0.2625 |  |  | $ | 0.2625 |  |  |  | $ | 0.7875 |  |  | $ | 0.7875 |  |  |

The accompanying notes are an integral part of these statements.
54

Table of Contents
Consumers Energy Company
Consolidated Statements of Income (Unaudited)

In Millions
| Three Months Ended | Nine Months Ended
September 30 | 2025 | 2024 |  | 2025 | 2024 |
Operating Revenue |  | $ | 1,913 |  |  | $ | 1,661 |  |  |  | $ | 6,007 |  |  | $ | 5,291 |  |  |
Operating Expenses |  |  |  |  |  |  |  |  |  |  |
Fuel for electric generation |  | 113 |  |  | 150 |  |  |  | 419 |  |  | 366 |  |  |
Purchased and interchange power |  | 490 |  |  | 346 |  |  |  | 1,219 |  |  | 989 |  |  |
Purchased power – related parties |  | 21 |  |  | 19 |  |  |  | 69 |  |  | 53 |  |  |
Cost of gas sold |  | 40 |  |  | 31 |  |  |  | 545 |  |  | 447 |  |  |
Maintenance and other operating expenses |  | 388 |  |  | 381 |  |  |  | 1,137 |  |  | 1,136 |  |  |
Depreciation and amortization |  | 274 |  |  | 261 |  |  |  | 925 |  |  | 878 |  |  |
General taxes |  | 104 |  |  | 95 |  |  |  | 369 |  |  | 346 |  |  |
Total operating expenses |  | 1,430 |  |  | 1,283 |  |  |  | 4,683 |  |  | 4,215 |  |  |
Operating Income |  | 483 |  |  | 378 |  |  |  | 1,324 |  |  | 1,076 |  |  |
Other Income (Expense) |  |  |  |  |  |  |  |  |  |  |
Non-operating retirement benefits, net |  | 44 |  |  | 39 |  |  |  | 128 |  |  | 118 |  |  |
Other income |  | 15 |  |  | 24 |  |  |  | 44 |  |  | 67 |  |  |
Other expense |  | (4) |  |  | (3) |  |  |  | (11) |  |  | (10) |  |  |
Total other income |  | 55 |  |  | 60 |  |  |  | 161 |  |  | 175 |  |  |
Interest Charges |  |  |  |  |  |  |  |  |  |  |
Interest on long-term debt |  | 135 |  |  | 123 |  |  |  | 388 |  |  | 364 |  |  |
Interest expense – related parties |  | 10 |  |  | 9 |  |  |  | 30 |  |  | 22 |  |  |
Other interest expense |  | 3 |  |  | 3 |  |  |  | 6 |  |  | 8 |  |  |
Allowance for borrowed funds used during construction |  | (3) |  |  | (4) |  |  |  | (8) |  |  | (8) |  |  |
Total interest charges |  | 145 |  |  | 131 |  |  |  | 416 |  |  | 386 |  |  |
Income Before Income Taxes |  | 393 |  |  | 307 |  |  |  | 1,069 |  |  | 865 |  |  |
Income Tax Expense |  | 79 |  |  | 34 |  |  |  | 221 |  |  | 139 |  |  |
Net Income |  | 314 |  |  | 273 |  |  |  | 848 |  |  | 726 |  |  |
Preferred Stock Dividends |  | — |  |  | — |  |  |  | 1 |  |  | 1 |  |  |
Net Income Available to Common Stockholder |  | $ | 314 |  |  | $ | 273 |  |  |  | $ | 847 |  |  | $ | 725 |  |  |

The accompanying notes are an integral part of these statements.
55

Table of Contents
Consumers Energy Company
Consolidated Statements of Comprehensive Income (Unaudited)

In Millions
| Three Months Ended | Nine Months Ended
September 30 | 2025 | 2024 |  | 2025 | 2024 |
Net Income |  | $ | 314 |  |  | $ | 273 |  |  |  | $ | 848 |  |  | $ | 726 |  |  |
Retirement Benefits Liability |  |  |  |  |  |  |  |  |  |  |
Amortization of net actuarial loss, net of tax of $— for all periods |  | — |  |  | 1 |  |  |  | — |  |  | 1 |  |  |
Other Comprehensive Income |  | — |  |  | 1 |  |  |  | — |  |  | 1 |  |  |
Comprehensive Income |  | $ | 314 |  |  | $ | 274 |  |  |  | $ | 848 |  |  | $ | 727 |  |  |

The accompanying notes are an integral part of these statements.
56

Table of Contents
Consumers Energy Company
Consolidated Statements of Cash Flows (Unaudited)

In Millions
Nine Months Ended September 30 | 2025 | 2024 |
Cash Flows from Operating Activities |  |  |  |  |  |
Net income |  | $ | 848 |  |  | $ | 726 |  |  |
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |  |  |
Depreciation and amortization |  | 925 |  |  | 878 |  |  |
Deferred income taxes and investment tax credits |  | 57 |  |  | 99 |  |  |
Other non‑cash operating activities and reconciling adjustments |  | (111) |  |  | (64) |  |  |
Changes in assets and liabilities |  |  |  |  |  |
Accounts and notes receivable and accrued revenue |  | 124 |  |  | 184 |  |  |
Inventories |  | (137) |  |  | 50 |  |  |
Accounts payable and accrued rate refunds |  | 1 |  |  | 25 |  |  |
Other current assets and liabilities |  | 121 |  |  | (29) |  |  |
Other non-current assets and liabilities |  | (54) |  |  | 145 |  |  |
Net cash provided by operating activities |  | 1,774 |  |  | 2,014 |  |  |
Cash Flows from Investing Activities |  |  |  |  |  |
Capital expenditures (excludes assets placed under finance lease) |  | (2,389) |  |  | (1,999) |  |  |
Proceeds from sale of ASP business |  | — |  |  | 124 |  |  |
Cost to retire property and other investing activities |  | (180) |  |  | (119) |  |  |
Net cash used in investing activities |  | (2,569) |  |  | (1,994) |  |  |
Cash Flows from Financing Activities |  |  |  |  |  |
Proceeds from issuance of debt |  | 1,123 |  |  | 1,297 |  |  |
Retirement of debt |  | (100) |  |  | (322) |  |  |
Decrease in notes payable |  | (65) |  |  | (93) |  |  |
Stockholder contribution |  | 695 |  |  | 320 |  |  |
Return of stockholder contribution |  | — |  |  | (320) |  |  |
Payment of dividends on common and preferred stock |  | (650) |  |  | (545) |  |  |
Other financing costs |  | (16) |  |  | (10) |  |  |
Net cash provided by financing activities |  | 987 |  |  | 327 |  |  |
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts |  | 192 |  |  | 347 |  |  |
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period |  | 119 |  |  | 56 |  |  |
Cash and Cash Equivalents, Including Restricted Amounts, End of Period |  | $ | 311 |  |  | $ | 403 |  |  |
Other Non‑cash Investing and Financing Activities
Non‑cash transactions |  |  |  |  |  |
Capital expenditures not paid |  | $ | 453 |  |  | $ | 382 |  |  |

The accompanying notes are an integral part of these statements.
57

Table of Contents
Consumers Energy Company
Consolidated Balance Sheets (Unaudited)

ASSETS
In Millions
| September 30 2025 | December 31 2024
Current Assets |  |  |  |
Cash and cash equivalents |  | $ | 242 |  |  | $ | 44 |
Restricted cash and cash equivalents |  | 69 |  |  | 75 |
Accounts receivable and accrued revenue, less allowance of $28 in 2025 and $23 in 2024 |  | 890 |  |  | 1,019 |
Accounts and notes receivable – related parties |  | 10 |  |  | 17 |
Inventories at average cost |  |  |  |
Gas in underground storage |  | 566 |  |  | 435 |
Materials and supplies |  | 299 |  |  | 291 |
Generating plant fuel stock |  | 28 |  |  | 30 |
Deferred property taxes |  | 294 |  |  | 448 |
Regulatory assets |  | 84 |  |  | 229 |
Prepayments and other current assets |  | 90 |  |  | 86 |
Total current assets |  | 2,572 |  |  | 2,674 |
Plant, Property, and Equipment |  |  |  |
Plant, property, and equipment, gross |  | 35,021 |  |  | 33,434 |
Less accumulated depreciation and amortization |  | 9,772 |  |  | 9,310 |
Plant, property, and equipment, net |  | 25,249 |  |  | 24,124 |
Construction work in progress |  | 2,532 |  |  | 1,766 |
Total plant, property, and equipment |  | 27,781 |  |  | 25,890 |
Other Non-current Assets |  |  |  |
Regulatory assets |  | 3,545 |  |  | 3,569 |
Accounts receivable |  | 24 |  |  | 26 |
Accounts and notes receivable – related parties |  | 88 |  |  | 92 |
Postretirement benefits |  | 1,622 |  |  | 1,514 |
Other |  | 148 |  |  | 323 |
Total other non-current assets |  | 5,427 |  |  | 5,524 |
Total Assets |  | $ | 35,780 |  |  | $ | 34,088 |

58

Table of Contents

LIABILITIES AND EQUITY
In Millions
| September 30 2025 | December 31 2024
Current Liabilities |  |  |  |
Current portion of long-term debt and finance leases |  | $ | 579 |  |  | $ | 456 |
Notes payable |  | — |  |  | 65 |
Accounts payable |  | 984 |  |  | 917 |
Accounts payable – related parties |  | 15 |  |  | 12 |
Accrued rate refunds |  | 9 |  |  | 38 |
Accrued interest |  | 147 |  |  | 130 |
Accrued taxes |  | 290 |  |  | 678 |
Regulatory liabilities |  | 89 |  |  | 111 |
Other current liabilities |  | 204 |  |  | 185 |
Total current liabilities |  | 2,317 |  |  | 2,592 |
Non-current Liabilities |  |  |  |
Long-term debt |  | 11,537 |  |  | 10,818 |
Long-term debt – related parties |  | 1,005 |  |  | 823 |
Non-current portion of finance leases |  | 84 |  |  | 69 |
Regulatory liabilities |  | 4,104 |  |  | 4,067 |
Postretirement benefits |  | 67 |  |  | 70 |
Asset retirement obligations |  | 696 |  |  | 694 |
Deferred investment tax credit |  | 119 |  |  | 122 |
Deferred income taxes |  | 3,185 |  |  | 3,053 |
Other non-current liabilities |  | 342 |  |  | 349 |
Total non-current liabilities |  | 21,139 |  |  | 20,065 |
Commitments and Contingencies (Notes 1 and 2) |  |  |  |
Equity |  |  |  |
Common stockholder’s equity |  |  |  |
Common stock, authorized 125.0 shares; outstanding 84.1 shares in both periods |  | 841 |  |  | 841 |
Other paid-in capital |  | 8,869 |  |  | 8,174 |
Accumulated other comprehensive loss |  | (11) |  |  | (11) |
Retained earnings |  | 2,588 |  |  | 2,390 |
Total common stockholder’s equity |  | 12,287 |  |  | 11,394 |
Cumulative preferred stock, $4.50 series, authorized 7.5 shares; outstanding 0.4 shares in both periods |  | 37 |  |  | 37 |
Total equity |  | 12,324 |  |  | 11,431 |
Total Liabilities and Equity |  | $ | 35,780 |  |  | $ | 34,088 |

The accompanying notes are an integral part of these statements.
59

Table of Contents
Consumers Energy Company
Consolidated Statements of Changes in Equity (Unaudited)

In Millions
| Three Months Ended | Nine Months Ended
September 30 | 2025 | 2024 |  | 2025 | 2024 |
Total Equity at Beginning of Period |  | $ | 11,698 |  |  | $ | 10,893 |  |  |  | $ | 11,431 |  |  | $ | 10,800 |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |
At beginning and end of period |  | 841 |  |  | 841 |  |  |  | 841 |  |  | 841 |  |  |
Other Paid-in Capital |  |  |  |  |  |  |  |  |  |  |
At beginning of period |  | 8,324 |  |  | 7,759 |  |  |  | 8,174 |  |  | 7,759 |  |  |
Stockholder contribution |  | 545 |  |  | — |  |  |  | 695 |  |  | 320 |  |  |
Return of stockholder contribution |  | — |  |  | — |  |  |  | — |  |  | (320) |  |  |
At end of period |  | 8,869 |  |  | 7,759 |  |  |  | 8,869 |  |  | 7,759 |  |  |
Accumulated Other Comprehensive Loss |  |  |  |  |  |  |  |  |  |  |
Retirement benefits liability |  |  |  |  |  |  |  |  |  |  |
At beginning of period |  | (11) |  |  | (15) |  |  |  | (11) |  |  | (15) |  |  |
Amortization of net actuarial loss |  | — |  |  | 1 |  |  |  | — |  |  | 1 |  |  |
At end of period |  | (11) |  |  | (14) |  |  |  | (11) |  |  | (14) |  |  |
Retained Earnings |  |  |  |  |  |  |  |  |  |  |
At beginning of period |  | 2,507 |  |  | 2,271 |  |  |  | 2,390 |  |  | 2,178 |  |  |
Net income |  | 314 |  |  | 273 |  |  |  | 848 |  |  | 726 |  |  |
Dividends declared on common stock |  | (233) |  |  | (185) |  |  |  | (649) |  |  | (544) |  |  |
Dividends declared on preferred stock |  | — |  |  | — |  |  |  | (1) |  |  | (1) |  |  |
At end of period |  | 2,588 |  |  | 2,359 |  |  |  | 2,588 |  |  | 2,359 |  |  |
Cumulative Preferred Stock |  |  |  |  |  |  |  |  |  |  |
At beginning and end of period |  | 37 |  |  | 37 |  |  |  | 37 |  |  | 37 |  |  |
Total Equity at End of Period |  | $ | 12,324 |  |  | $ | 10,982 |  |  |  | $ | 12,324 |  |  | $ | 10,982 |  |  |

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

Table of Contents
CMS Energy Corporation
Consumers Energy Company
Notes to the Unaudited Consolidated Financial Statements
These interim consolidated financial statements have been prepared by CMS Energy and Consumers in accordance with GAAP for interim financial information and with the instructions to Form 10‑Q and Article 10 of Regulation S‑X. As a result, CMS Energy and Consumers have condensed or omitted certain information and note disclosures normally included in consolidated financial statements prepared in accordance with GAAP. CMS Energy and Consumers have reclassified certain prior period amounts to conform to the presentation in the present period.
CMS Energy and Consumers are required to make estimates using assumptions that may affect reported amounts and disclosures; actual results could differ from these estimates. In management’s opinion, the unaudited information contained in this report reflects all adjustments of a normal recurring nature necessary to ensure that CMS Energy’s and Consumers’ financial position, results of operations, and cash flows for the periods presented are fairly stated. The notes to the unaudited consolidated financial statements and the related unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes contained in the 2024 Form 10‑K. Due to the seasonal nature of CMS Energy’s and Consumers’ operations, the results presented for this interim period are not necessarily indicative of results to be achieved for the fiscal year.
1: Regulatory Matters
Regulatory matters are critical to Consumers. The Michigan Attorney General, ABATE, the MPSC Staff, residential customer advocacy groups, environmental organizations, and certain other parties typically participate in MPSC proceedings concerning Consumers, such as Consumers’ rate cases and power supply cost recovery and gas cost recovery processes. Intervenors also participate in certain FERC matters, including FERC’s regulation of certain wholesale rates that affect Consumers’ power supply costs. These parties often challenge various aspects of those proceedings, including the prudence of Consumers’ policies and practices, and seek cost disallowances and other relief. The parties also have appealed significant MPSC orders. Depending upon the specific issues, the outcomes of rate cases and proceedings, including judicial proceedings challenging MPSC and FERC orders or other actions, could negatively affect CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations. Consumers cannot predict the outcome of these proceedings.
2024 Electric Rate Case: In May 2024, Consumers filed an application with the MPSC seeking a rate increase of $325 million, made up of two components. First, Consumers requested a $303 million annual rate increase, based on a 10.25‑percent authorized return on equity for the projected 12‑month period ending February 28, 2026. The filing requested authority to recover costs related to new infrastructure investment primarily in distribution system reliability and cleaner energy resources. Second, Consumers requested approval of a $22 million surcharge for the recovery of distribution investments made in 2023 that exceeded the rates authorized in accordance with previous electric rate orders.
In October 2024, Consumers revised its requested increase to $277 million, primarily to reflect the removal of projected capital investments associated with certain solar facilities that Consumers incorporated into its amended renewable energy plan.
61

Table of Contents
In March 2025, the MPSC issued an order authorizing an annual rate increase of $176 million, which is inclusive of a $22 million surcharge for the recovery of distribution investments made in 2023 that exceeded the rate amounts authorized in accordance with previous electric rate orders. The approved rate increase is based on a 9.90‑percent authorized return on equity. The new rates became effective in April 2025.
J.H. Campbell Emergency Order: In May 2025, before the planned closure of J.H. Campbell, the U.S. Secretary of Energy issued an emergency order under section 202(c) of the Federal Power Act requiring J.H. Campbell to continue operating for 90 days, through August 20, 2025. The order stated that continued operation of J.H. Campbell was required to meet an energy emergency across MISO’s North and Central regions. Consistent with the Federal Power Act and the U.S. Department of Energy regulations, the order authorizes Consumers to obtain cost recovery at FERC.
In June 2025, Consumers filed a complaint at FERC seeking a modification of the MISO Tariff that would enable Consumers to recover the costs of complying with the emergency order. Consumers’ complaint seeks a mechanism in the MISO Tariff that would allow allocation of those compliance costs across the MISO North and Central regions, consistent with the nature of the energy emergency declared in the U.S. Department of Energy order.
On August 20, 2025, the U.S. Secretary of Energy issued a second emergency order requiring J.H. Campbell to continue operating for another 90 days, through November 19, 2025. Consumers is complying with the August 2025 emergency order. Also in August 2025, FERC granted Consumers’ complaint seeking modification of the MISO Tariff and ordered MISO to revise its tariff accordingly. MISO submitted a compliance filing with FERC in September 2025, and FERC approval of the compliance filing remains pending. During the initial emergency order period, the net financial impact of compliance was $53 million after applying MISO revenues of $67 million. For the second emergency order period through September 30, 2025, the net financial impact of compliance was $27 million after applying MISO revenues of $17 million. Upon FERC approval of the requested tariff modification, Consumers intends to file for recovery and allocation of costs to comply with the emergency orders across the region specified by the emergency orders. The ultimate financial impact remains subject to the outcome of the FERC proceeding and any future guidance or interpretation.
Service Restoration Cost Deferral Application: As a result of catastrophic storms in Consumers’ electric service territory, Consumers incurred significant service restoration costs during March and April 2025. In April 2025, Consumers filed with the MPSC an ex parte application requesting approval to defer, as a regulatory asset, operating and maintenance expenses associated with the storms. In June 2025, the MPSC approved the application, authorizing the deferral of these expenses for accounting purposes. At September 30, 2025, Consumers had a $54 million regulatory asset recorded associated with these costs, recovery for which will be requested in a future case.
62

Table of Contents
2: Contingencies and Commitments
CMS Energy and Consumers are involved in various matters that give rise to contingent liabilities. Depending on the specific issues, the resolution of these contingencies could negatively affect CMS Energy’s and Consumers’ liquidity, financial condition, and results of operations. In their disclosures of these matters, CMS Energy and Consumers provide an estimate of the possible loss or range of loss when such an estimate can be made. Disclosures stating that CMS Energy or Consumers cannot predict the outcome of a matter indicate that they are unable to estimate a possible loss or range of loss for the matter.
CMS Energy Contingencies
CMS Land retained environmental remediation obligations for the collection and treatment of leachate at Bay Harbor after selling its interests in the development in 2002. Leachate is produced when water enters into cement kiln dust piles left over from former cement plant operations at the site. In 2012, CMS Land and EGLE finalized an agreement establishing the final remedies and the future water quality criteria at the site. CMS Land completed all construction necessary to implement the remedies required by the agreement and will continue to maintain and operate a system to discharge treated leachate into Little Traverse Bay under an NPDES permit, which is valid through 2025. CMS Land submitted a renewal request in March 2025, and will continue to operate under the existing permit until a renewal is issued.
At September 30, 2025, CMS Energy had a recorded liability of $47 million for its remaining obligations for environmental remediation. CMS Energy calculated this liability based on discounted projected costs, using a discount rate of 4.34 percent and an inflation rate of 1 percent on annual operating and maintenance costs. The undiscounted amount of the remaining obligation is $59 million. CMS Energy expects to pay the following amounts for long-term leachate disposal and operating and maintenance costs during the remainder of 2025 and in each of the next five years:

In Millions
| 2025 | 2026 | 2027 | 2028 | 2029 | 2030
Long-term leachate disposal and operating and maintenance costs |  | $ | 1 |  |  | $ | 4 |  |  | $ | 4 |  |  | $ | 4 |  |  | $ | 4 |  |  | $ | 4 |

CMS Energy’s estimate of response activity costs and the timing of expenditures could change if there are changes in circumstances or assumptions used in calculating the liability. Although a liability for its present estimate of remaining response activity costs has been recorded, CMS Energy cannot predict the ultimate financial impact or outcome of this matter.
Consumers Electric Utility Contingencies
Electric Environmental Matters: Consumers’ operations are subject to environmental laws and regulations. Historically, Consumers has generally been able to recover, in customer rates, the costs to operate its facilities in compliance with these laws and regulations.
Cleanup and Solid Waste: Consumers expects to incur remediation and other response activity costs at a number of sites under NREPA. Consumers believes that these costs should be recoverable in rates, but cannot guarantee that outcome. Consumers estimates its liability for NREPA sites for which it can estimate a range of loss to be between $4 million and $5 million. At September 30, 2025, Consumers had a recorded liability of $4 million, the minimum amount in the range of its estimated probable NREPA liability, as no amount in the range was considered a better estimate than any other amount.
63

Table of Contents
Consumers is a potentially responsible party at a number of contaminated sites administered under CERCLA. CERCLA liability is joint and several. In 2010, Consumers received official notification from the EPA that identified Consumers as a potentially responsible party for cleanup of PCBs at the Kalamazoo River CERCLA site. The notification claimed that the EPA had reason to believe that Consumers disposed of PCBs and arranged for the disposal and treatment of PCB-containing materials at portions of the site. In 2011, Consumers received a follow-up letter from the EPA requesting that Consumers agree to participate in a removal action plan along with several other companies for an area of lower Portage Creek, which is connected to the Kalamazoo River. All parties asked to participate in the removal action plan, including Consumers, declined to accept liability. Until further information is received from the EPA, Consumers is unable to estimate a range of potential liability for cleanup of the river.
Based on its experience, Consumers estimates its share of the total liability for known CERCLA sites to be between $3 million and $8 million. Various factors, including the number and creditworthiness of potentially responsible parties involved with each site, affect Consumers’ share of the total liability. At September 30, 2025, Consumers had a recorded liability of $3 million for its share of the total liability at these sites, the minimum amount in the range of its estimated probable CERCLA liability, as no amount in the range was considered a better estimate than any other amount.
The timing of payments related to Consumers’ remediation and other response activities at its CERCLA and NREPA sites is uncertain. Consumers periodically reviews these cost estimates. A change in the underlying assumptions, such as an increase in the number of sites, different remediation techniques, the nature and extent of contamination, and legal and regulatory requirements, could affect its estimates of NREPA and CERCLA liability.
Ludington Overhaul Contract Dispute: Consumers and DTE Electric, co-owners of Ludington, entered into a 2010 engineering, procurement, and construction agreement with Toshiba International, under which Toshiba International contracted to perform a major overhaul and upgrade of Ludington. Toshiba International later assigned the contract and all of its obligations to TAES. TAES’ work under the contract was incomplete, defective, and non‑conforming. Consumers and DTE Electric repeatedly documented TAES’ failure to perform under the contract and demanded that TAES provide a comprehensive plan to resolve those matters, including adherence to its warranty commitments and other contractual obligations. Consumers and DTE Electric engaged in extensive efforts to resolve these issues with TAES, including a formal demand to TAES’ parent, Toshiba, under a parent guaranty it provided. TAES did not provide a comprehensive plan or otherwise meet its performance obligations. As a result of TAES’ defaults, Consumers and DTE Electric terminated the contract.
In order to enforce their rights under the contract and parent guaranty, and to pursue appropriate damages, Consumers and DTE Electric filed a complaint against TAES and Toshiba in the U.S. District Court for the Eastern District of Michigan in 2022. TAES and Toshiba filed a motion to dismiss the complaint, along with an answer and counterclaims seeking approximately $15 million in damages related to payments allegedly owed under the parties’ contract. As a co-owner of Ludington, Consumers would be liable for 51 percent of any such damages, if liability and damages were proven. The court denied the motion to dismiss filed by TAES and Toshiba. The trial is scheduled to begin in the fourth quarter of 2025. Consumers believes the counterclaims filed by TAES and Toshiba are without merit, but cannot predict the financial impact or outcome of this matter. An unfavorable outcome could have a material adverse effect on CMS Energy’s and Consumers’ financial condition, results of operations, or liquidity.
In 2023, Toshiba announced that TBJH became the majority shareholder and new parent company of Toshiba through a common stock purchase. TBJH is a subsidiary of a Japanese private equity firm. Consumers and DTE Electric continue to monitor this development, but do not believe that this affects their rights under the parent guaranty provided by Toshiba.
64

Table of Contents
In 2023, the MPSC approved Consumers’ and DTE Electric’s jointly-filed request for authority to defer as a regulatory asset the costs associated with repairing or replacing the defective work performed by TAES while the litigation with TAES and Toshiba moves forward. Although litigation is ongoing, Consumers currently estimates that its share of repair, replacement, and other damages resulting from TAES’ defective work is approximately $350 million, which may be offset in part or entirely by any potential future litigation proceeds received from TAES or Toshiba. Consumers and DTE Electric will have the opportunity to seek appropriate recovery and ratemaking treatment for amounts recorded as a regulatory asset following resolution of the litigation, including any amounts not recovered from TAES or Toshiba. Consumers cannot predict the financial impact or outcome of such proceedings.
Consumers Gas Utility Contingencies
Consumers expects to incur remediation and other response activity costs at a number of sites under NREPA. These sites include 23 former MGP facilities. Consumers operated the facilities on these sites for some part of their operating lives. For some of these sites, Consumers has no present ownership interest or may own only a portion of the original site.
At September 30, 2025, Consumers had a recorded liability of $60 million for its remaining obligations for these sites. Consumers expects to pay the following amounts for remediation and other response activity costs during the remainder of 2025 and in each of the next five years:

In Millions
| 2025 | 2026 | 2027 | 2028 | 2029 | 2030
Remediation and other response activity costs |  | $ | — |  |  | $ | 3 |  |  | $ | 8 |  |  | $ | 25 |  |  | $ | 11 |  |  | $ | 3 |

Consumers periodically reviews these cost estimates. Any significant change in the underlying assumptions, such as an increase in the number of sites, changes in remediation techniques, or legal and regulatory requirements, could affect Consumers’ estimates of annual response activity costs and the MGP liability.
Pursuant to orders issued by the MPSC, Consumers defers its MGP-related remediation costs and recovers them from its customers over a ten-year period. At September 30, 2025, Consumers had a regulatory asset of $85 million related to the MGP sites.
65

Table of Contents
Guarantees
Presented in the following table are CMS Energy’s and Consumers’ guarantees at September 30, 2025:

In Millions
Guarantee Description | Issue Date | Expiration Date | Maximum Obligation | Carrying Amount
CMS Energy, including Consumers |  |  |  |  |  |
Indemnity obligations from sale of membership interests in VIEs 1 | various | various |  | $ | 229 |  |  | $ | — |
Indemnity obligations from stock and asset sale agreements 2 | various | indefinite |  | 152 |  |  | — |
Guarantee 3 | 2011 | indefinite |  | 30 |  |  | — |
Consumers |  |  |  |  |  |
Guarantee 3 | 2011 | indefinite |  | $ | 30 |  |  | $ | — |

1 These obligations arose from the sale of membership interests in Aviator Wind, Newport Solar Holdings, and NWO Holdco to tax equity investors. NorthStar Clean Energy provided certain indemnity obligations that protect the tax equity investors against losses incurred as a result of breaches of representations and warranties under the associated limited liability company agreements. These obligations are generally capped at an amount equal to the tax equity investor’s capital contributions plus a specified return, less any distributions and tax benefits it receives, in connection with its membership interest. For any indemnity obligations related to Aviator Wind, NorthStar Clean Energy would recover 49 percent of any amounts paid to the tax equity investor from the other owner of Aviator Wind Equity Holdings. Additionally, Aviator Wind holds insurance coverage that would partially protect against losses incurred as a result of certain failures to qualify for production tax credits. For further details on NorthStar Clean Energy’s ownership interest in Aviator Wind, Newport Solar Holdings, and NWO Holdco, see Note 11, Variable Interest Entities.
2 These obligations arose from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy indemnified the purchaser for losses resulting from various matters, including claims related to taxes. The maximum obligation amount is mostly related to an Equatorial Guinea tax claim.
3 This obligation comprises a guarantee provided by Consumers to the U.S. Department of Energy in connection with a settlement agreement regarding damages resulting from the department’s failure to accept spent nuclear fuel from nuclear power plants formerly owned by Consumers.
Additionally, in the normal course of business, CMS Energy, Consumers, and certain other subsidiaries of CMS Energy have entered into various agreements containing tax and other indemnity provisions for which they are unable to estimate the maximum potential obligation. CMS Energy and Consumers consider the likelihood that they would be required to perform or incur substantial losses related to these indemnities and those disclosed in the table to be remote.
Other Contingencies
In addition to the matters disclosed in this Note and Note 1, Regulatory Matters, there are certain other lawsuits and administrative proceedings before various courts and governmental agencies, as well as unasserted claims that may result in such proceedings, arising in the ordinary course of business to which CMS Energy, Consumers, and certain other subsidiaries of CMS Energy are parties. These other lawsuits, proceedings, and unasserted claims may involve personal injury, property damage, contracts, environmental matters, federal and state taxes, rates, licensing, employment, and other matters. Certain of these matters, while potentially substantial, are covered by insurance and the insurer or insurers are
66

Table of Contents
involved in the relevant proceedings. Further, CMS Energy and Consumers occasionally self-report certain regulatory non‑compliance matters that may or may not eventually result in administrative proceedings. CMS Energy and Consumers believe that the outcome of any one of these proceedings and potential claims will not have a material negative effect on their consolidated results of operations, financial condition, or liquidity.
3: Financings and Capitalization
Financings: Presented in the following table is a summary of major long-term debt issuances during the nine months ended September 30, 2025:

| Principal (In Millions) | Interest Rate (%) | Issuance Date | Maturity Date
CMS Energy, parent only |  |  |  |  |
Junior subordinated notes 1 |  | $ | 1,000 |  | 6.500 |  | February 2025 | June 2055
Term loan credit agreement |  | 110 |  | variable | February 2025 | December 2025
Total CMS Energy, parent only |  | $ | 1,110 |  |  |  |
NorthStar Clean Energy, including subsidiaries |  |  |  |  |
Construction financing agreement 2 |  | $ | 179 |  | variable | February 2025 | Five years after conversion date 2
Total NorthStar Clean Energy, including subsidiaries |  | $ | 179 |  |  |  |
Consumers |  |  |  |  |
First mortgage bonds |  | $ | 500 |  | 4.500 |  | May 2025 | January 2031
First mortgage bonds |  | 625 |  | 5.050 |  | May 2025 | May 2035
Total Consumers |  | $ | 1,125 |  |  |  |
Total CMS Energy |  | $ | 2,414 |  |  |  |

1 These unsecured obligations rank subordinate and junior in right of payment to all of CMS Energy’s existing and future senior indebtedness. On June 1, 2035, and every five years thereafter, the notes will reset to an interest rate equal to the five-year treasury rate plus 1.961 percent.
2 At completion of project construction, scheduled for the first half of 2026, these financings will convert into a term loan that will mature five years after the conversion date.
Retirements: Presented in the following table is a summary of major long-term debt retirements during the nine months ended September 30, 2025:

| Principal (In Millions) | Interest Rate (%) | Retirement Date | Maturity Date
CMS Energy, parent only |  |  |  |  |
Term loan credit agreement |  | $ | 400 |  | variable | February 2025 | September 2025
Term loan credit agreement |  | 200 |  | variable | February 2025 | December 2025
Total CMS Energy, parent only |  | $ | 600 |  |  |  |
Total CMS Energy |  | $ | 600 |  |  |  |

CMS Energy’s Purchase of Consumers’ First Mortgage Bonds: CMS Energy purchased Consumers’ first mortgage bonds with a principal balance of $184 million during the nine months ended September 30, 2025 in exchange for cash of $109 million. On a consolidated basis, CMS Energy’s
67

Table of Contents
repurchase of Consumers’ first mortgage bonds was accounted for as a debt extinguishment and resulted in a pre-tax gain of $72 million during the nine months ended September 30, 2025, which was recorded in other income on CMS Energy’s consolidated statements of income. Interest expense related to the repurchased bonds was $8 million for the three months ended September 30, 2025 and $21 million for the nine months ended September 30, 2025, which was recorded in interest expense - related parties on Consumers’ consolidated statements of income.
CMS Energy purchased Consumers’ first mortgage bonds with a principal balance of $69 million during the three months ended September 30, 2024 and $311 million during the nine months ended September 30, 2024, in exchange for cash of $49 million and $218 million, respectively. On a consolidated basis, CMS Energy’s repurchase of Consumers’ first mortgage bonds was accounted for as a debt extinguishment and resulted in a pre-tax gain of $20 million for the three months ended September 30, 2024 and a pre-tax gain of $90 million for the nine months ended September 30, 2024, which was recorded in other income on its consolidated statements of income. Interest expense related to the repurchased bonds was $5 million for the three months ended September 30, 2024 and $13 million for the nine months ended September 30, 2024, which was recorded in interest expense - related parties on Consumers’ consolidated statements of income.
Credit Facilities: The following credit facilities with banks were available at September 30, 2025:

In Millions
Expiration Date | Amount of Facility | Amount Borrowed | Letters of Credit Outstanding | Amount Available
CMS Energy, parent only |  |  |  |  |  |  |  |
December 14, 2027 1 |  | $ | 550 |  |  | $ | — |  |  | $ | 35 |  |  | $ | 515 |
September 30, 2026 |  | 50 |  |  | — |  |  | 50 |  |  | — |
NorthStar Clean Energy, including subsidiaries |  |  |  |  |  |  |  |
May 30, 2028 2 |  | $ | 250 |  |  | $ | 180 |  |  | $ | 8 |  |  | $ | 62 |
December 25, 2025 3 |  | 37 |  |  | — |  |  | 37 |  |  | — |
Upon completion of construction project 4 |  | 19 |  |  | — |  |  | 12 |  |  | 7 |
Consumers |  |  |  |  |  |  |  |
December 14, 2027 5 |  | $ | 1,100 |  |  | $ | — |  |  | $ | 10 |  |  | $ | 1,090 |
November 18, 2025 5 |  | 250 |  |  | — |  |  | 112 |  |  | 138 |
March 31, 2028 |  | 50 |  |  | — |  |  | 42 |  |  | 8 |

1 There were no borrowings under this facility during the nine months ended September 30, 2025.
2 Obligations under this facility are secured by certain pledged equity interests in subsidiaries of NorthStar Clean Energy; under the terms of this facility, the interests may not be sold by NorthStar Clean Energy unless there is an agreed-upon substitution for the pledged equity interests. At September 30, 2025, the net book value of the pledged equity interests was $515 million. Also under the terms of this facility, NorthStar Clean Energy may be restricted from remitting cash dividends to CMS Energy in the event of default.
3 This letter of credit facility is available to Aviator Wind Equity Holdings. For more information regarding Aviator Wind Equity Holdings, see Note 11, Variable Interest Entities.
4 The letter of credit facility is available to certain subsidiaries of NorthStar Clean Energy. The letter of credit facility will expire upon completion of project construction scheduled for the first half of 2026.
5 Obligations under these facilities are secured by first mortgage bonds of Consumers. There were no borrowings under these facilities during the nine months ended September 30, 2025.
68

Table of Contents
Regulatory Authorization for Financings: Consumers is required to maintain FERC authorization for financings. Any long-term issuances during the authorization period are exempt from FERC’s competitive bidding and negotiated placement requirements. Its short-term authorization ends on May 2, 2026. In February 2025, FERC approved Consumers’ application for authority to issue long-term debt securities. The authorization is effective February 21, 2025 through February 20, 2027.
Short-term Borrowings: Under Consumers’ commercial paper program, Consumers may issue, in one or more placements, investment-grade commercial paper notes with maturities of up to 365 days at market interest rates. These issuances are supported by Consumers’ revolving credit facilities and may have an aggregate principal amount outstanding of up to $500 million. While the amount of outstanding commercial paper does not reduce the available capacity of the revolving credit facilities, Consumers does not intend to issue commercial paper in an amount exceeding the available capacity of the facilities. At September 30, 2025, there were no commercial paper notes outstanding under this program.
In December 2024, Consumers renewed a short-term credit agreement with CMS Energy, permitting Consumers to borrow up to $500 million at an interest rate of the prior month’s average one‑month Term SOFR minus 0.100 percent. At September 30, 2025, there were no outstanding borrowings under the agreement.
NorthStar Clean Energy’s Supplier Financing Program: Under a supplier financing program, NorthStar Clean Energy agrees to pay a bank that is acting as its payment agent the stated amount of confirmed invoices from participating suppliers on the original maturity dates of the invoices. The bank is required to pay the supplier invoices that have been confirmed as valid under the program in full within 135 days of the invoice date. NorthStar Clean Energy does not provide collateral or a guarantee to the bank in support of its payment obligations under the agreement, nor does it pay a fee for the service. NorthStar Clean Energy or the bank may terminate the supplier financing program agreement upon 30 days prior written notice to the other party. At September 30, 2025, obligations under this program accounted for as accounts payable on CMS Energy’s consolidated balance sheets were $79 million.
Dividend Restrictions: At September 30, 2025, payment of dividends by CMS Energy on its common stock was limited to $8.6 billion under provisions of the Michigan Business Corporation Act of 1972.
Under the provisions of its articles of incorporation, at September 30, 2025, Consumers had $2.5 billion of unrestricted retained earnings available to pay dividends on its common stock to CMS Energy. Provisions of the Federal Power Act and the Natural Gas Act appear to restrict dividends payable by Consumers to the amount of Consumers’ retained earnings. Several decisions from FERC suggest that, under a variety of circumstances, dividends from Consumers on its common stock would not be limited to amounts in Consumers’ retained earnings. Any decision by Consumers to pay dividends on its common stock in excess of retained earnings would be based on specific facts and circumstances and would be subject to a formal regulatory filing process.
During the nine months ended September 30, 2025, Consumers paid $649 million in dividends on its common stock to CMS Energy.
Issuance of Common Stock: In 2023, CMS Energy entered into an equity offering program under which it may sell shares of its common stock having an aggregate sales price of up to $1 billion in privately negotiated transactions, in “at the market” offerings, or through forward sales transactions.
Under the forward sales transactions, CMS Energy may either settle physically by issuing shares of its common stock at the then-applicable forward sale price specified by the agreement or settle net by delivering or receiving cash or shares. CMS Energy may settle the contracts at any time through their
69

Table of Contents
maturity dates, and presently intends to physically settle the contracts by delivering shares of its common stock.
During the three months ended September 30, 2025, CMS Energy entered into forward sale agreements for approximately 2.1 million shares at a weighted average initial forward price of $72.42 per share. During the same period, CMS Energy settled forward sale contracts under this program by issuing approximately 5.0 million shares at a weighted average price of $70.52 p er share, resulting in net proceeds o f $349 million.
In October 2025, CMS Energy completed an additional settlement issuing approximately 2.0 million shares at a weighted average price of $72.73, resulting in net proceeds of $147 million. Following these transactions, outstanding forward contracts under the program have an aggregate sales price of $8 million, maturing through November 30, 2026.
The initial forward price in the forward equity sale contracts includes a deduction for commissions and will be adjusted on a daily basis over the term based on an interest rate factor and decreased on certain dates by certain predetermined amounts to reflect expected dividend payments. No amounts are recorded on CMS Energy’s consolidated balance sheets until settlements of the forward equity sale contracts occur. If CMS Energy had elected to net share settle or net cash settle the contracts as of September 30, 2025, it would have been required to deliver 21,313 shares or pay $2 million in cash.
4: Fair Value Measurements
Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. When measuring fair value, CMS Energy and Consumers are required to incorporate all assumptions that market participants would use in pricing an asset or liability, including assumptions about risk. A fair value hierarchy prioritizes inputs used to measure fair value according to their observability in the market. The three levels of the fair value hierarchy are as follows:
•Level 1 inputs are unadjusted quoted prices in active markets for identical assets or liabilities.
•Level 2 inputs are observable, market-based inputs, other than Level 1 prices. Level 2 inputs may include quoted prices for similar assets or liabilities in active markets, quoted prices in inactive markets, and inputs derived from or corroborated by observable market data.
•Level 3 inputs are unobservable inputs that reflect CMS Energy’s or Consumers’ own assumptions about how market participants would value their assets and liabilities.
CMS Energy and Consumers classify fair value measurements within the fair value hierarchy based on the lowest level of input that is significant to the fair value measurement in its entirety.
70

Table of Contents
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Presented in the following table are CMS Energy’s and Consumers’ assets and liabilities recorded at fair value on a recurring basis:

In Millions
| CMS Energy, including Consumers |  | Consumers
| September 30 2025 | December 31 2024 |  | September 30 2025 | December 31 2024
Assets 1 |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 75 |  |  | $ | 27 |  |  |  | $ | — |  |  | $ | — |
Restricted cash equivalents |  | 70 |  |  | 75 |  |  |  | 69 |  |  | 75 |
Nonqualified deferred compensation plan assets |  | 35 |  |  | 34 |  |  |  | 27 |  |  | 25 |
Derivative instruments |  | 3 |  |  | 2 |  |  |  | 3 |  |  | 2 |
Total assets |  | $ | 183 |  |  | $ | 138 |  |  |  | $ | 99 |  |  | $ | 102 |
Liabilities 1 |  |  |  |  |  |  |  |  |
Nonqualified deferred compensation plan liabilities |  | $ | 35 |  |  | $ | 34 |  |  |  | $ | 27 |  |  | $ | 25 |
Derivative instruments |  | 4 |  |  | — |  |  |  | — |  |  | — |
Total liabilities |  | $ | 39 |  |  | $ | 34 |  |  |  | $ | 27 |  |  | $ | 25 |

1 All assets and liabilities were classified as Level 1 with the exception of derivative contracts, which were classified as Level 2 and 3.
Cash Equivalents: Cash equivalents and restricted cash equivalents consist of money market funds with daily liquidity.
Nonqualified Deferred Compensation Plan Assets and Liabilities: The nonqualified deferred compensation plan assets consist of mutual funds, which are bought and sold only at the discretion of plan participants. The assets are valued using the daily quoted net asset values. CMS Energy and Consumers value their nonqualified deferred compensation plan liabilities based on the fair values of the plan assets, as they reflect the amount owed to the plan participants in accordance with their investment elections. CMS Energy and Consumers report the assets in other non‑current assets and the liabilities in other non‑current liabilities on their consolidated balance sheets.
Derivative Instruments: CMS Energy and Consumers value their derivative instruments using either a market approach that incorporates information from market transactions, or an income approach that discounts future expected cash flows to a present value amount. CMS Energy’s and Consumers’ derivatives are classified as Level 2 and 3.
The derivatives classified as Level 2 are interest rate swaps at NorthStar Clean Energy, which are valued using market-based inputs.
In February 2025, a subsidiary of NorthStar Clean Energy entered into floating-to-fixed interest rate swaps to reduce the impact of interest rate fluctuations associated with interest payments on certain future long‑term variable-rate debt. The interest rate swaps economically hedge the future variability of interest payments on debt with a notional amount of $109 million. Gains or losses on these swaps are reported in other expense on CMS Energy’s consolidated statements of income. The amount recorded in other expense was less than $1 million for the three months ended September 30, 2025 and $4 million for the
71

Table of Contents
nine months ended September 30, 2025. The fair value of these swaps recorded in other non-current liabilities on CMS Energy’s consolidated balance sheets totaled $4 million at September 30, 2025.
The majority of derivatives classified as Level 3 are FTRs held by Consumers. Due to the lack of quoted pricing information, Consumers determines the fair value of its FTRs based on Consumers’ average historical settlements. Consumers reports derivatives associated with FTRs in other current assets on its consolidated balance sheets.There was no material activity within the Level 3 category of derivatives during the periods presented.
72

Table of Contents
5: Financial Instruments
Presented in the following table are the carrying amounts and fair values, by level within the fair value hierarchy, of CMS Energy’s and Consumers’ financial instruments that are not recorded at fair value. The table excludes cash, cash equivalents, short-term financial instruments, and trade accounts receivable and payable whose carrying amounts approximate their fair values. For information about assets and liabilities recorded at fair value and for additional details regarding the fair value hierarchy, see Note 4, Fair Value Measurements.

In Millions
| September 30, 2025 |  | December 31, 2024
| Carrying Amount | Fair Value |  | Carrying Amount | Fair Value
| Total | Level |  | Total | Level
| 1 | 2 | 3 |  | 1 | 2 | 3
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term receivables 1 |  | $ | 7 |  |  | $ | 6 |  |  | $ | — |  |  | $ | — |  |  | $ | 6 |  |  |  | $ | 9 |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | 8 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt 2 |  | 17,930 |  |  | 16,993 |  |  | 2,111 |  |  | 12,932 |  |  | 1,950 |  |  |  | 16,386 |  |  | 14,876 |  |  | 1,018 |  |  | 11,952 |  |  | 1,906 |
Long-term payables 3 |  | 8 |  |  | 8 |  |  | — |  |  | — |  |  | 8 |  |  |  | 9 |  |  | 9 |  |  | — |  |  | — |  |  | 9 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term receivables 1 |  | $ | 7 |  |  | $ | 6 |  |  | $ | — |  |  | $ | — |  |  | $ | 6 |  |  |  | $ | 9 |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | 8 |
Notes receivable – related party 4 |  | 91 |  |  | 91 |  |  | — |  |  | — |  |  | 91 |  |  |  | 94 |  |  | 94 |  |  | — |  |  | — |  |  | 94 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt 5 |  | 12,109 |  |  | 11,132 |  |  | — |  |  | 9,182 |  |  | 1,950 |  |  |  | 11,270 |  |  | 9,940 |  |  | — |  |  | 8,034 |  |  | 1,906 |
Long-term debt – related party 6 |  | 1,005 |  |  | 674 |  |  | — |  |  | 674 |  |  | — |  |  |  | 823 |  |  | 549 |  |  | — |  |  | 549 |  |  | — |
Long-term payables |  | 2 |  |  | 2 |  |  | — |  |  | — |  |  | 2 |  |  |  | 4 |  |  | 4 |  |  | — |  |  | — |  |  | 4 |

1 Includes current portion of long-term accounts receivable and notes receivable of $3 million at September 30, 2025 and $4 million at December 31, 2024.
2 Includes current portion of long-term debt of $1.2 billion at September 30, 2025 and December 31, 2024.
3 Includes current portion of long-term payables of $1 million at September 30, 2025 and $2 million at December 31, 2024.
4 Includes current portion of notes receivable – related party of $7 million at September 30, 2025 and December 31, 2024.
73

Table of Contents
5 Includes current portion of long-term debt of $572 million at September 30, 2025 and $452 million at December 31, 2024.
6 For more information on CMS Energy’s repurchases of Consumers’ first mortgage bonds, see Note 3, Financings and Capitalization—CMS Energy’s Purchase of Consumers’ First Mortgage Bonds.
Notes receivable – related party represents Consumers’ portion of the DB SERP demand note payable issued by CMS Energy to the DB SERP rabbi trust. The demand note bears interest at an annual rate of 4.10 percent and has a maturity date of 2028.
6: Retirement Benefits
CMS Energy and Consumers provide pension, OPEB, and other retirement benefits to eligible employees under a number of different plans.
Costs: Presented in the following table are the costs (credits) and other changes in plan assets and benefit obligations incurred in CMS Energy’s and Consumers’ retirement benefit plans:

In Millions
| DB Pension Plans |  | OPEB Plan
| Three Months Ended |  | Nine Months Ended |  | Three Months Ended |  | Nine Months Ended
September 30 | 2025 | 2024 |  | 2025 | 2024 |  |  | 2025 | 2024 |  | 2025 | 2024 |
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net periodic credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 6 |  |  | $ | 7 |  |  |  | $ | 19 |  |  | $ | 21 |  |  |  |  |  | $ | 2 |  |  | $ | 2 |  |  |  | $ | 6 |  |  | $ | 8 |  |  |
Interest cost |  | 27 |  |  | 26 |  |  |  | 81 |  |  | 78 |  |  |  |  |  | 10 |  |  | 10 |  |  |  | 32 |  |  | 32 |  |  |
Expected return on plan assets |  | (57) |  |  | (58) |  |  |  | (171) |  |  | (176) |  |  |  |  |  | (27) |  |  | (28) |  |  |  | (83) |  |  | (86) |  |  |
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | 3 |  |  | 3 |  |  |  | 8 |  |  | 9 |  |  |  |  |  | — |  |  | 1 |  |  |  | 2 |  |  | 3 |  |  |
Prior service cost (credit) |  | 1 |  |  | 1 |  |  |  | 3 |  |  | 3 |  |  |  |  |  | (8) |  |  | (7) |  |  |  | (25) |  |  | (23) |  |  |
Settlement loss |  | 3 |  |  | 3 |  |  |  | 8 |  |  | 8 |  |  |  |  |  | — |  |  | — |  |  |  | — |  |  | — |  |  |
Net periodic credit |  | $ | (17) |  |  | $ | (18) |  |  |  | $ | (52) |  |  | $ | (57) |  |  |  |  |  | $ | (23) |  |  | $ | (22) |  |  |  | $ | (68) |  |  | $ | (66) |  |  |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net periodic credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 6 |  |  | $ | 7 |  |  |  | $ | 18 |  |  | $ | 20 |  |  |  |  |  | $ | 2 |  |  | $ | 2 |  |  |  | $ | 6 |  |  | $ | 8 |  |  |
Interest cost |  | 26 |  |  | 25 |  |  |  | 77 |  |  | 74 |  |  |  |  |  | 11 |  |  | 11 |  |  |  | 32 |  |  | 31 |  |  |
Expected return on plan assets |  | (54) |  |  | (56) |  |  |  | (162) |  |  | (166) |  |  |  |  |  | (26) |  |  | (26) |  |  |  | (78) |  |  | (80) |  |  |
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | 2 |  |  | 3 |  |  |  | 7 |  |  | 8 |  |  |  |  |  | — |  |  | 1 |  |  |  | 2 |  |  | 3 |  |  |
Prior service cost (credit) |  | 1 |  |  | 1 |  |  |  | 3 |  |  | 3 |  |  |  |  |  | (8) |  |  | (8) |  |  |  | (25) |  |  | (23) |  |  |
Settlement loss |  | 3 |  |  | 3 |  |  |  | 8 |  |  | 8 |  |  |  |  |  | — |  |  | — |  |  |  | — |  |  | — |  |  |
Net periodic credit |  | $ | (16) |  |  | $ | (17) |  |  |  | $ | (49) |  |  | $ | (53) |  |  |  |  |  | $ | (21) |  |  | $ | (20) |  |  |  | $ | (63) |  |  | $ | (61) |  |  |

In Consumers’ electric and gas rate cases, the MPSC approved a mechanism allowing Consumers to defer for future recovery or refund pension and OPEB expenses above or below the amounts used to set existing rates. Amounts deferred will be collected from or refunded to customers over ten years. At September 30, 2025, CMS Energy, including Consumers, had deferred $1 million of pension costs and
74

Table of Contents
$7 million of OPEB credits under this mechanism related to 2025 expense. At September 30, 2024, CMS Energy, including Consumers, had deferred $12 million of pension credits and $8 million of OPEB credits under this mechanism related to 2024 expense.
7: Income Taxes
Presented in the following table is a reconciliation of the statutory U.S. federal income tax rate to the effective income tax rate from continuing operations:

Nine Months Ended September 30 | 2025 |  | 2024 |  |
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |
U.S. federal income tax rate |  | 21.0 | % |  |  |  | 21.0 | % |  |  |  |
Increase (decrease) in income taxes from: |  |  |  |  |  |  |  |  |  |
State and local income taxes, net of federal effect 1 |  | 7.2 |  |  |  |  | 5.4 |  |  |  |  |
Renewable energy tax credits |  | (5.7) |  |  |  |  | (6.3) |  |  |  |  |
TCJA excess deferred taxes |  | (3.5) |  |  |  |  | (3.8) |  |  |  |  |
Deferred tax adjustment 2 |  | — |  |  |  |  | (1.9) |  |  |  |  |
Taxes attributable to noncontrolling interests |  | 1.2 |  |  |  |  | 1.1 |  |  |  |  |
Other, net |  | 0.1 |  |  |  |  | (0.2) |  |  |  |  |
Effective tax rate |  | 20.3 | % |  |  |  | 15.3 | % |  |  |  |
Consumers |  |  |  |  |  |  |  |  |  |
U.S. federal income tax rate |  | 21.0 | % |  |  |  | 21.0 | % |  |  |  |
Increase (decrease) in income taxes from: |  |  |  |  |  |  |  |  |  |
State and local income taxes, net of federal effect 1 |  | 6.5 |  |  |  |  | 5.0 |  |  |  |  |
Renewable energy tax credits |  | (3.6) |  |  |  |  | (4.4) |  |  |  |  |
TCJA excess deferred taxes |  | (3.0) |  |  |  |  | (3.5) |  |  |  |  |
Deferred tax adjustment 2 |  | — |  |  |  |  | (1.8) |  |  |  |  |
Other, net |  | (0.2) |  |  |  |  | (0.2) |  |  |  |  |
Effective tax rate |  | 20.7 | % |  |  |  | 16.1 | % |  |  |  |

1 In June 2025, state deferred tax balances were increased by $12 million to reflect a change in Illinois tax policy that establishes nexus for Consumers. The policy change is effective for tax years beginning January 1, 2026.
2 In September 2024, Consumers recognized a $16 million tax benefit resulting from the expiration of the statute of limitations associated with audit points for the 2018 and 2019 tax years.
State Income Tax Claim: In February 2025, CMS Energy received an adverse ruling from the Michigan Tax Tribunal in regards to the methodology of state apportionment for Consumers’ electricity sales to MISO. In March 2025, CMS Energy filed an appeal with the Michigan Court of Appeals and a final decision is not expected until 2026. CMS Energy and Consumers have evaluated and concluded their uncertain tax positions associated with this matter to be sufficient as of September 30, 2025. While CMS Energy and Consumers expect the appeal to prevail, if it were to fail, the companies would be required to revise the estimated value of their state deferred tax liabilities, which could result in a material impact to their results of operations.
Tax Legislation: CMS Energy and Consumers are subject to changing tax laws. In July 2025, President Trump signed into law the OBBBA. The legislation allows for the immediate expensing of domestic research and development costs and includes changes to clean energy tax credits enacted by the
75

Table of Contents
Inflation Reduction Act of 2022. While the OBBBA restores, and makes permanent, the 100‑percent bonus depreciation deduction, it also retains a provision that allows utilities to take a full deduction of interest expense in lieu of 100‑percent bonus depreciation. Based on guidance available to date, CMS Energy and Consumers evaluated the provisions of the OBBBA and concluded that the legislation is not expected to have a material impact on their respective financial statements. This conclusion is subject to change as additional guidance or interpretations become available.
8: Earnings Per Share—CMS Energy
Presented in the following table are CMS Energy’s basic and diluted EPS computations based on income from continuing operations:

In Millions, Except Per Share Amounts
| Three Months Ended |  | Nine Months Ended
September 30 | 2025 | 2024 |  | 2025 | 2024 |
Income available to common stockholders |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 272 |  |  | $ | 247 |  |  |  | $ | 760 |  |  | $ | 692 |  |  |
Less loss attributable to noncontrolling interests |  | (5) |  |  | (6) |  |  |  | (22) |  |  | (46) |  |  |
Less preferred stock dividends |  | 2 |  |  | 2 |  |  |  | 7 |  |  | 7 |  |  |
Income from continuing operations available to common stockholders – basic and diluted |  | $ | 275 |  |  | $ | 251 |  |  |  | $ | 775 |  |  | $ | 731 |  |  |
Average common shares outstanding |  |  |  |  |  |  |  |  |  |  |
Weighted-average shares – basic |  | 299.7 |  |  | 298.0 |  |  |  | 298.8 |  |  | 297.5 |  |  |
Add dilutive nonvested stock awards |  | 0.6 |  |  | 0.8 |  |  |  | 0.6 |  |  | 0.7 |  |  |
Add dilutive forward equity sale contracts |  | 0.1 |  |  | — |  |  |  | — |  |  | — |  |  |
Weighted-average shares – diluted |  | 300.4 |  |  | 298.8 |  |  |  | 299.4 |  |  | 298.2 |  |  |
Income from continuing operations per average common share available to common stockholders |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.92 |  |  | $ | 0.84 |  |  |  | $ | 2.59 |  |  | $ | 2.45 |  |  |
Diluted |  | 0.92 |  |  | 0.84 |  |  |  | 2.59 |  |  | 2.45 |  |  |

Nonvested Stock Awards
CMS Energy’s nonvested stock awards are composed of participating and non‑participating securities. The participating securities accrue cash dividends when common stockholders receive dividends. Since the recipient is not required to return the dividends to CMS Energy if the recipient forfeits the award, the nonvested stock awards are considered participating securities. As such, the participating nonvested stock awards were included in the computation of basic EPS. The non‑participating securities accrue stock dividends that vest concurrently with the stock award. If the recipient forfeits the award, the stock dividends accrued on the non‑participating securities are also forfeited. Accordingly, the non‑participating awards and stock dividends were included in the computation of diluted EPS, but not in the computation of basic EPS.
Forward Equity Sale Contracts
CMS Energy has entered into forward equity sale contracts. These forward equity sale contracts are non-participating securities. While the forward sale price in the forward equity sale contract is decreased on certain dates by certain predetermined amounts to reflect expected dividend payments, these price
76

Table of Contents
adjustments were set upon inception of the agreement and the forward contract does not give the owner the right to participate in undistributed earnings. Accordingly, the forward equity sale contracts were included in the computation of diluted EPS, but not in the computation of basic EPS.
The potentially dilutive impact from these forward equity sale contracts is reflected in diluted EPS using the treasury stock method. There will be a dilutive effect on EPS when the average market price of common stock shares is above the applicable adjusted forward sale price. Additionally, any physical settlement or net share settlement of the agreements would dilute EPS. For further details on the forward equity sale contracts, see Note 3, Financings and Capitalization.
Convertible Securities
In 2023, CMS Energy issued convertible senior notes. Potentially dilutive common shares issuable upon conversion of the convertible senior notes are determined using the if-converted method for calculating diluted EPS. Upon conversion, the convertible senior notes are required to be paid in cash with only amounts exceeding the principal permitted to be settled in shares. Accordingly, the convertible senior notes were included in the computation of diluted EPS, but not in the computation of basic EPS. The impact to diluted EPS was de minimis.
77

Table of Contents
9: Revenue
Presented in the following tables are the components of operating revenue:

In Millions
Three Months Ended September 30, 2025 | Electric Utility | Gas Utility | NorthStar Clean Energy 1 |  | Consolidated
CMS Energy, including Consumers
Consumers utility revenue |  | $ | 1,675 |  |  | $ | 233 |  |  | $ | — |  |  |  |  | $ | 1,908 |
Other |  | — |  |  | — |  |  | 67 |  |  |  |  | 67 |
Revenue recognized from contracts with customers |  | $ | 1,675 |  |  | $ | 233 |  |  | $ | 67 |  |  |  |  | $ | 1,975 |
Leasing income |  | — |  |  | — |  |  | 41 |  |  |  |  | 41 |
Financing income |  | 2 |  |  | 1 |  |  | — |  |  |  |  | 3 |
Consumers alternative-revenue programs |  | 2 |  |  | — |  |  | — |  |  |  |  | 2 |
Total operating revenue – CMS Energy |  | $ | 1,679 |  |  | $ | 234 |  |  | $ | 108 |  |  |  |  | $ | 2,021 |
Consumers
Consumers utility revenue |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 842 |  |  | $ | 139 |  |  |  |  |  |  | $ | 981 |
Commercial |  | 577 |  |  | 45 |  |  |  |  |  |  | 622 |
Industrial |  | 204 |  |  | 6 |  |  |  |  |  |  | 210 |
Other |  | 52 |  |  | 43 |  |  |  |  |  |  | 95 |
Revenue recognized from contracts with customers |  | $ | 1,675 |  |  | $ | 233 |  |  |  |  |  |  | $ | 1,908 |
Financing income |  | 2 |  |  | 1 |  |  |  |  |  |  | 3 |
Alternative-revenue programs |  | 2 |  |  | — |  |  |  |  |  |  | 2 |
Total operating revenue – Consumers |  | $ | 1,679 |  |  | $ | 234 |  |  |  |  |  |  | $ | 1,913 |

1 Amounts represent NorthStar Clean Energy’s operating revenue from independent power production and its sales of energy commodities. Certain of NorthStar Clean Energy’s power sales agreements are accounted for as operating leases. In addition to fixed payments, these agreements have variable payments based on energy delivered. NorthStar Clean Energy’s leasing income included variable lease payments of $28 million for the three months ended September 30, 2025.
78

Table of Contents

In Millions
Three Months Ended September 30, 2024 | Electric Utility | Gas Utility | NorthStar Clean Energy 1 |  | Consolidated
CMS Energy, including Consumers
Consumers utility revenue |  | $ | 1,443 |  |  | $ | 212 |  |  | $ | — |  |  |  |  | $ | 1,655 |
Other |  | — |  |  | — |  |  | 56 |  |  |  |  | 56 |
Revenue recognized from contracts with customers |  | $ | 1,443 |  |  | $ | 212 |  |  | $ | 56 |  |  |  |  | $ | 1,711 |
Leasing income |  | — |  |  | — |  |  | 26 |  |  |  |  | 26 |
Financing income |  | 4 |  |  | 1 |  |  | — |  |  |  |  | 5 |
Consumers alternative-revenue programs |  | 1 |  |  | — |  |  | — |  |  |  |  | 1 |
Total operating revenue – CMS Energy |  | $ | 1,448 |  |  | $ | 213 |  |  | $ | 82 |  |  |  |  | $ | 1,743 |
Consumers
Consumers utility revenue |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 707 |  |  | $ | 127 |  |  |  |  |  |  | $ | 834 |
Commercial |  | 486 |  |  | 40 |  |  |  |  |  |  | 526 |
Industrial |  | 169 |  |  | 5 |  |  |  |  |  |  | 174 |
Other |  | 81 |  |  | 40 |  |  |  |  |  |  | 121 |
Revenue recognized from contracts with customers |  | $ | 1,443 |  |  | $ | 212 |  |  |  |  |  |  | $ | 1,655 |
Financing income |  | 4 |  |  | 1 |  |  |  |  |  |  | 5 |
Alternative-revenue programs |  | 1 |  |  | — |  |  |  |  |  |  | 1 |
Total operating revenue – Consumers |  | $ | 1,448 |  |  | $ | 213 |  |  |  |  |  |  | $ | 1,661 |

1 Amounts represent NorthStar Clean Energy’s operating revenue from independent power production and its sales of energy commodities. Certain of NorthStar Clean Energy’s power sales agreements are accounted for as operating leases. In addition to fixed payments, these agreements have variable payments based on energy delivered. NorthStar Clean Energy’s leasing income included variable lease payments of $15 million for the three months ended September 30, 2024.
79

Table of Contents

In Millions
Nine Months Ended September 30, 2025 | Electric Utility | Gas Utility | NorthStar Clean Energy 1 |  | Consolidated
CMS Energy, including Consumers
Consumers utility revenue |  | $ | 4,324 |  |  | $ | 1,665 |  |  | $ | — |  |  |  |  | $ | 5,989 |
Other |  | — |  |  | — |  |  | 182 |  |  |  |  | 182 |
Revenue recognized from contracts with customers |  | $ | 4,324 |  |  | $ | 1,665 |  |  | $ | 182 |  |  |  |  | $ | 6,171 |
Leasing income |  | — |  |  | — |  |  | 117 |  |  |  |  | 117 |
Financing income |  | 7 |  |  | 5 |  |  | — |  |  |  |  | 12 |
Consumers alternative-revenue programs |  | 6 |  |  | — |  |  | — |  |  |  |  | 6 |
Total operating revenue – CMS Energy |  | $ | 4,337 |  |  | $ | 1,670 |  |  | $ | 299 |  |  |  |  | $ | 6,306 |
Consumers
Consumers utility revenue |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 2,055 |  |  | $ | 1,146 |  |  |  |  |  |  | $ | 3,201 |
Commercial |  | 1,468 |  |  | 374 |  |  |  |  |  |  | 1,842 |
Industrial |  | 576 |  |  | 46 |  |  |  |  |  |  | 622 |
Other |  | 225 |  |  | 99 |  |  |  |  |  |  | 324 |
Revenue recognized from contracts with customers |  | $ | 4,324 |  |  | $ | 1,665 |  |  |  |  |  |  | $ | 5,989 |
Financing income |  | 7 |  |  | 5 |  |  |  |  |  |  | 12 |
Alternative-revenue programs |  | 6 |  |  | — |  |  |  |  |  |  | 6 |
Total operating revenue – Consumers |  | $ | 4,337 |  |  | $ | 1,670 |  |  |  |  |  |  | $ | 6,007 |

1 Amounts represent NorthStar Clean Energy’s operating revenue from independent power production and its sales of energy commodities. Certain of NorthStar Clean Energy’s power sales agreements are accounted for as operating leases. In addition to fixed payments, these agreements have variable payments based on energy delivered. NorthStar Clean Energy’s leasing income included variable lease payments of $82 million for the nine months ended September 30, 2025.
80

Table of Contents

In Millions
Nine Months Ended September 30, 2024 | Electric Utility | Gas Utility | NorthStar Clean Energy 1 |  | Consolidated
CMS Energy, including Consumers
Consumers utility revenue |  | $ | 3,793 |  |  | $ | 1,480 |  |  | $ | — |  |  |  |  | $ | 5,273 |
Other |  | — |  |  | — |  |  | 158 |  |  |  |  | 158 |
Revenue recognized from contracts with customers |  | $ | 3,793 |  |  | $ | 1,480 |  |  | $ | 158 |  |  |  |  | $ | 5,431 |
Leasing income |  | — |  |  | — |  |  | 77 |  |  |  |  | 77 |
Financing income |  | 8 |  |  | 5 |  |  | — |  |  |  |  | 13 |
Consumers alternative-revenue programs |  | 5 |  |  | — |  |  | — |  |  |  |  | 5 |
Total operating revenue – CMS Energy |  | $ | 3,806 |  |  | $ | 1,485 |  |  | $ | 235 |  |  |  |  | $ | 5,526 |
Consumers
Consumers utility revenue |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 1,779 |  |  | $ | 998 |  |  |  |  |  |  | $ | 2,777 |
Commercial |  | 1,279 |  |  | 311 |  |  |  |  |  |  | 1,590 |
Industrial |  | 499 |  |  | 37 |  |  |  |  |  |  | 536 |
Other |  | 236 |  |  | 134 |  |  |  |  |  |  | 370 |
Revenue recognized from contracts with customers |  | $ | 3,793 |  |  | $ | 1,480 |  |  |  |  |  |  | $ | 5,273 |
Financing income |  | 8 |  |  | 5 |  |  |  |  |  |  | 13 |
Alternative-revenue programs |  | 5 |  |  | — |  |  |  |  |  |  | 5 |
Total operating revenue – Consumers |  | $ | 3,806 |  |  | $ | 1,485 |  |  |  |  |  |  | $ | 5,291 |

1 Amounts represent NorthStar Clean Energy’s operating revenue from independent power production and its sales of energy commodities. Certain of NorthStar Clean Energy’s power sales agreements are accounted for as operating leases. In addition to fixed payments, these agreements have variable payments based on energy delivered. NorthStar Clean Energy’s leasing income included variable lease payments of $44 million for the nine months ended September 30, 2024.
Electric and Gas Utilities
Consumers Utility Revenue: Consumers recognizes revenue primarily from the sale of electric and gas utility services at tariff-based rates regulated by the MPSC. Consumers’ customer base consists of a mix of residential, commercial, and diversified industrial customers. Consumers’ tariff-based sales performance obligations are described below.
•Consumers has performance obligations for the service of standing ready to deliver electricity or natural gas to customers, and it satisfies these performance obligations over time. Consumers recognizes revenue at a fixed rate as it provides these services. These arrangements generally do not have fixed terms and remain in effect as long as the customer consumes the utility service. The rates are set by the MPSC through the rate-making process and represent the stand-alone selling price of Consumers’ service to stand ready to deliver.
•Consumers has performance obligations for the service of delivering the commodity of electricity or natural gas to customers, and it satisfies these performance obligations upon delivery. Consumers recognizes revenue at a price per unit of electricity or natural gas delivered, based on the tariffs established by the MPSC. These arrangements generally do not have fixed terms and remain in effect as long as the customer consumes the utility service. The rates are set by the MPSC through the rate-making process and represent the stand-alone selling price of a bundled
81

Table of Contents
product comprising the commodity, electricity or natural gas, and the service of delivering such commodity.
In some instances, Consumers has specific fixed-term contracts with large commercial and industrial customers to provide electricity or gas at certain tariff rates or to provide gas transportation services at contracted rates. The amount of electricity and gas to be delivered under these contracts and the associated future revenue to be received are generally dependent on the customers’ needs. Accordingly, Consumers recognizes revenues at the tariff or contracted rate as electricity or gas is delivered to the customer. Consumers also has other miscellaneous contracts with customers related to pole and other property rentals and utility contract work. Generally, these contracts are short term or evergreen in nature.
Accounts Receivable and Unbilled Revenues: Accounts receivable comprise trade receivables and unbilled receivables. CMS Energy and Consumers record their accounts receivable at cost less an allowance for uncollectible accounts. The allowance is increased for uncollectible accounts expense and decreased for account write-offs net of recoveries. CMS Energy and Consumers establish the allowance based on historical losses, management’s assessment of existing economic conditions, customer payment trends, and reasonable and supported forecast information. CMS Energy and Consumers assess late payment fees on trade receivables based on contractual past-due terms established with customers. Accounts are written off when deemed uncollectible, which is generally when they become six months past due.
CMS Energy and Consumers recorded uncollectible accounts expense of $10 million for the three months ended September 30, 2025 and $7 million for the three months ended September 30, 2024. CMS Energy and Consumers recorded uncollectible accounts expense of $30 million for the nine months ended September 30, 2025 and $24 million for the nine months ended September 30, 2024.
Consumers’ customers are billed monthly in cycles having billing dates that do not generally coincide with the end of a calendar month. This results in customers having received electricity or natural gas that they have not been billed for as of the month-end. Consumers estimates its unbilled revenues by applying an average billed rate to total unbilled deliveries for each customer class. Unbilled revenues, which are recorded as accounts receivable and accrued revenue on CMS Energy’s and Consumers’ consolidated balance sheets, were $381 million at September 30, 2025 and $584 million at December 31, 2024.
Alternative‑revenue Program: Under a demand response incentive mechanism, Consumers earns a financial incentive when it meets demand response targets set by the MPSC. Consumers recognizes revenue related to this program once demand response incentive objectives are complete, the incentive amount is calculable, and the incentive revenue will be collected within a 24‑month period.
Consumers also accounts for its financial compensation mechanism as an alternative-revenue program. Consumers recognizes revenue related to the financial compensation mechanism as payments are made on MPSC-approved PPAs.
Consumers does not reclassify revenue from its alternative-revenue program to revenue from contracts with customers at the time the amounts are collected from customers.
82

Table of Contents
10: Reportable Segments
Reportable segments consist of business units defined by the products and services they offer. CMS Energy’s and Consumers’ chief operating decision-maker is the CEO. The chief operating decision-maker evaluates segment performance and profitability using net income available to CMS Energy’s common stockholders. This metric provides a clear, consistent basis for analyzing the financial results of each segment and supports decision-making regarding the allocation of resources.
Resource allocation to CMS Energy’s and Consumers’ segments begins with the annual budgeting process, which establishes initial funding and resource levels for each segment. The budget incorporates key financial and operational inputs, including anticipated revenues, expenses, and capital requirements, aligning with CMS Energy’s and Consumers’ strategic objectives and regulatory obligations. The chief operating decision-maker reviews budget-to-actual variances on a monthly basis and makes interim decisions to reallocate resources among segments as needed, ensuring a timely and effective response to changing conditions. For the electric utility and gas utility segments, the chief operating decision-maker uses this assessment to determine whether the segments are achieving their regulatory authorized return on equity.
CMS Energy
The segments reported for CMS Energy are:
•electric utility, consisting of regulated activities associated with the generation, purchase, distribution, and sale of electricity in Michigan
•gas utility, consisting of regulated activities associated with the purchase, transmission, storage, distribution, and sale of natural gas in Michigan
•NorthStar Clean Energy, consisting of various subsidiaries engaging in domestic independent power production, including the development and operation of renewable generation, and the marketing of independent power production
CMS Energy presents corporate interest and other expenses, discontinued operations, and Consumers’ other consolidated entities within other reconciling items.
Consumers
The segments reported for Consumers are:
•electric utility, consisting of regulated activities associated with the generation, purchase, distribution, and sale of electricity in Michigan
•gas utility, consisting of regulated activities associated with the purchase, transmission, storage, distribution, and sale of natural gas in Michigan
Consumers’ other consolidated entities are presented within other reconciling items.
83

Table of Contents

In Millions
Three Months Ended September 30, 2025 | Electric Utility | Gas Utility | NorthStar Clean Energy | Segments Total | Other Reconciling Items | Consolidated
CMS Energy, including Consumers
Operating revenue |  | $ | 1,679 |  |  | $ | 234 |  |  | $ | 108 |  |  | $ | 2,021 |  |  | $ | — |  |  | $ | 2,021 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |  |
Power supply cost 1 |  | 624 |  |  | — |  |  | 63 |  |  | 687 |  |  | — |  |  | 687 |
Cost of gas sold |  | — |  |  | 40 |  |  | 2 |  |  | 42 |  |  | — |  |  | 42 |
Maintenance and other operating expenses |  | 285 |  |  | 103 |  |  | 25 |  |  | 413 |  |  | 3 |  |  | 416 |
Depreciation and amortization |  | 239 |  |  | 35 |  |  | 14 |  |  | 288 |  |  | — |  |  | 288 |
General taxes |  | 81 |  |  | 23 |  |  | 3 |  |  | 107 |  |  | — |  |  | 107 |
Total operating expenses |  | 1,229 |  |  | 201 |  |  | 107 |  |  | 1,537 |  |  | 3 |  |  | 1,540 |
Operating Income (Loss) |  | 450 |  |  | 33 |  |  | 1 |  |  | 484 |  |  | (3) |  |  | 481 |
Other income |  | 34 |  |  | 22 |  |  | 4 |  |  | 60 |  |  | 2 |  |  | 62 |
Interest charges |  | 92 |  |  | 53 |  |  | (1) |  |  | 144 |  |  | 59 |  |  | 203 |
Income (Loss) Before Income Taxes |  | 392 |  |  | 2 |  |  | 6 |  |  | 400 |  |  | (60) |  |  | 340 |
Income tax expense |  | 66 |  |  | 2 |  |  | — |  |  | 68 |  |  | — |  |  | 68 |
Income (Loss) From Continuing Operations |  | 326 |  |  | — |  |  | 6 |  |  | 332 |  |  | (60) |  |  | 272 |
Other segment items 2 |  | — |  |  | — |  |  | 5 |  |  | 5 |  |  | (2) |  |  | 3 |
Net Income (Loss) Available to Common Stockholders |  | $ | 326 |  |  | $ | — |  |  | $ | 11 |  |  | $ | 337 |  |  | $ | (62) |  |  | $ | 275 |
Property, plant, and equipment, gross |  | $ | 21,095 |  | 3 | $ | 13,890 |  | 3 | $ | 1,568 |  |  | $ | 36,553 |  |  | $ | 30 |  |  | $ | 36,583 |
Total assets |  | 21,917 |  | 3 | 13,720 |  | 3 | 2,229 |  |  | 37,866 |  |  | 142 |  |  | 38,008 |

1 Power supply costs comprise of fuel for electric generation, purchased and interchange power, and purchased power – related parties.
2 Other segment items comprise of loss attributable to noncontrolling interests and preferred stock dividends.
3 Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.
84

Table of Contents

In Millions
Three Months Ended September 30, 2025 | Electric Utility | Gas Utility | Segments Total | Other Reconciling Items | Consolidated
Consumers
Operating revenue |  | $ | 1,679 |  |  | $ | 234 |  |  | $ | 1,913 |  |  | $ | — |  |  | $ | 1,913 |
Operating expenses |  |  |  |  |  |  |  |  |  |
Power supply cost 1 |  | 624 |  |  | — |  |  | 624 |  |  | — |  |  | 624 |
Cost of gas sold |  | — |  |  | 40 |  |  | 40 |  |  | — |  |  | 40 |
Maintenance and other operating expenses |  | 285 |  |  | 103 |  |  | 388 |  |  | — |  |  | 388 |
Depreciation and amortization |  | 239 |  |  | 35 |  |  | 274 |  |  | — |  |  | 274 |
General taxes |  | 81 |  |  | 23 |  |  | 104 |  |  | — |  |  | 104 |
Total operating expenses |  | 1,229 |  |  | 201 |  |  | 1,430 |  |  | — |  |  | 1,430 |
Operating Income |  | 450 |  |  | 33 |  |  | 483 |  |  | — |  |  | 483 |
Other income |  | 34 |  |  | 22 |  |  | 56 |  |  | (1) |  |  | 55 |
Interest charges |  | 92 |  |  | 53 |  |  | 145 |  |  | — |  |  | 145 |
Income (Loss) Before Income Taxes |  | 392 |  |  | 2 |  |  | 394 |  |  | (1) |  |  | 393 |
Income tax expense |  | 66 |  |  | 2 |  |  | 68 |  |  | 11 |  |  | 79 |
Net Income (Loss) Available to Common Stockholder |  | $ | 326 |  |  | $ | — |  |  | $ | 326 |  |  | $ | (12) |  |  | $ | 314 |
Property, plant, and equipment, gross |  | $ | 21,095 |  | 2 | $ | 13,890 |  | 2 | $ | 34,985 |  |  | $ | 36 |  |  | $ | 35,021 |
Total assets |  | 21,972 |  | 2 | 13,762 |  | 2 | 35,734 |  |  | 46 |  |  | 35,780 |

1 Power supply costs comprise of fuel for electric generation, purchased and interchange power, and purchased power – related parties.
2 Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.
85

Table of Contents

In Millions
Three Months Ended September 30, 2024 | Electric Utility | Gas Utility | NorthStar Clean Energy | Segments Total | Other Reconciling Items | Consolidated
CMS Energy, including Consumers
Operating revenue |  | $ | 1,448 |  |  | $ | 213 |  |  | $ | 82 |  |  | $ | 1,743 |  |  | $ | — |  |  | $ | 1,743 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |  |
Power supply cost 1 |  | 515 |  |  | — |  |  | 45 |  |  | 560 |  |  | — |  |  | 560 |
Cost of gas sold |  | — |  |  | 31 |  |  | 1 |  |  | 32 |  |  | — |  |  | 32 |
Maintenance and other operating expenses |  | 282 |  |  | 99 |  |  | 27 |  |  | 408 |  |  | 4 |  |  | 412 |
Depreciation and amortization |  | 229 |  |  | 32 |  |  | 12 |  |  | 273 |  |  | — |  |  | 273 |
General taxes |  | 75 |  |  | 20 |  |  | 4 |  |  | 99 |  |  | — |  |  | 99 |
Total operating expenses |  | 1,101 |  |  | 182 |  |  | 89 |  |  | 1,372 |  |  | 4 |  |  | 1,376 |
Operating Income (Loss) |  | 347 |  |  | 31 |  |  | (7) |  |  | 371 |  |  | (4) |  |  | 367 |
Other income |  | 35 |  |  | 25 |  |  | 3 |  |  | 63 |  |  | 21 |  |  | 84 |
Interest charges |  | 82 |  |  | 49 |  |  | 2 |  |  | 133 |  |  | 45 |  |  | 178 |
Income (Loss) Before Income Taxes |  | 300 |  |  | 7 |  |  | (6) |  |  | 301 |  |  | (28) |  |  | 273 |
Income tax expense (benefit) |  | 27 |  |  | (4) |  |  | (6) |  |  | 17 |  |  | 9 |  |  | 26 |
Income (Loss) From Continuing Operations |  | 273 |  |  | 11 |  |  | — |  |  | 284 |  |  | (37) |  |  | 247 |
Other segment items 2 |  | — |  |  | — |  |  | 6 |  |  | 6 |  |  | (2) |  |  | 4 |
Net Income (Loss) Available to Common Stockholders |  | $ | 273 |  |  | $ | 11 |  |  | $ | 6 |  |  | $ | 290 |  |  | $ | (39) |  |  | $ | 251 |
Property, plant, and equipment, gross |  | $ | 19,826 |  | 3 | $ | 12,840 |  | 3 | $ | 1,469 |  |  | $ | 34,135 |  |  | $ | 21 |  |  | $ | 34,156 |
Total assets |  | 20,222 |  | 3 | 12,809 |  | 3 | 1,711 |  |  | 34,742 |  |  | 75 |  |  | 34,817 |

1 Power supply costs comprise of fuel for electric generation, purchased and interchange power, and purchased power – related parties.
2 Other segment items comprise of income from discontinued operations, net of tax, loss attributable to noncontrolling interests, and preferred stock dividends.
3 Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.
86

Table of Contents

In Millions
Three Months Ended September 30, 2024 | Electric Utility | Gas Utility | Segments Total | Other Reconciling Items | Consolidated
Consumers
Operating revenue |  | $ | 1,448 |  |  | $ | 213 |  |  | $ | 1,661 |  |  | $ | — |  |  | $ | 1,661 |
Operating expenses |  |  |  |  |  |  |  |  |  |
Power supply cost 1 |  | 515 |  |  | — |  |  | 515 |  |  | — |  |  | 515 |
Cost of gas sold |  | — |  |  | 31 |  |  | 31 |  |  | — |  |  | 31 |
Maintenance and other operating expenses |  | 282 |  |  | 99 |  |  | 381 |  |  | — |  |  | 381 |
Depreciation and amortization |  | 229 |  |  | 32 |  |  | 261 |  |  | — |  |  | 261 |
General taxes |  | 75 |  |  | 20 |  |  | 95 |  |  | — |  |  | 95 |
Total operating expenses |  | 1,101 |  |  | 182 |  |  | 1,283 |  |  | — |  |  | 1,283 |
Operating Income |  | 347 |  |  | 31 |  |  | 378 |  |  | — |  |  | 378 |
Other income |  | 35 |  |  | 25 |  |  | 60 |  |  | — |  |  | 60 |
Interest charges |  | 82 |  |  | 49 |  |  | 131 |  |  | — |  |  | 131 |
Income Before Income Taxes |  | 300 |  |  | 7 |  |  | 307 |  |  | — |  |  | 307 |
Income tax expense (benefit) |  | 27 |  |  | (4) |  |  | 23 |  |  | 11 |  |  | 34 |
Net Income (Loss) Available to Common Stockholder |  | $ | 273 |  |  | $ | 11 |  |  | $ | 284 |  |  | $ | (11) |  |  | $ | 273 |
Property, plant, and equipment, gross |  | $ | 19,826 |  | 2 | $ | 12,840 |  | 2 | $ | 32,666 |  |  | $ | 29 |  |  | $ | 32,695 |
Total assets |  | 20,279 |  | 2 | 12,852 |  | 2 | 33,131 |  |  | 29 |  |  | 33,160 |

1 Power supply costs comprise of fuel for electric generation, purchased and interchange power, and purchased power – related parties.
2 Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.
87

Table of Contents
Presented in the following tables is financial information by segment:

In Millions
Nine Months Ended September 30, 2025 | Electric Utility | Gas Utility | NorthStar Clean Energy | Segments Total | Other Reconciling Items | Consolidated
CMS Energy, including Consumers
Operating revenue |  | $ | 4,337 |  |  | $ | 1,670 |  |  | $ | 299 |  |  | $ | 6,306 |  |  | $ | — |  |  | $ | 6,306 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |  |
Power supply cost 1 |  | 1,707 |  |  | — |  |  | 198 |  |  | 1,905 |  |  | — |  |  | 1,905 |
Cost of gas sold |  | — |  |  | 545 |  |  | 4 |  |  | 549 |  |  | — |  |  | 549 |
Maintenance and other operating expenses |  | 806 |  |  | 331 |  |  | 73 |  |  | 1,210 |  |  | 8 |  |  | 1,218 |
Depreciation and amortization |  | 682 |  |  | 243 |  |  | 39 |  |  | 964 |  |  | — |  |  | 964 |
General taxes |  | 227 |  |  | 142 |  |  | 9 |  |  | 378 |  |  | — |  |  | 378 |
Total operating expenses |  | 3,422 |  |  | 1,261 |  |  | 323 |  |  | 5,006 |  |  | 8 |  |  | 5,014 |
Operating Income (Loss) |  | 915 |  |  | 409 |  |  | (24) |  |  | 1,300 |  |  | (8) |  |  | 1,292 |
Other income |  | 97 |  |  | 64 |  |  | 7 |  |  | 168 |  |  | 81 |  |  | 249 |
Interest charges |  | 263 |  |  | 152 |  |  | (2) |  |  | 413 |  |  | 175 |  |  | 588 |
Income (Loss) Before Income Taxes |  | 749 |  |  | 321 |  |  | (15) |  |  | 1,055 |  |  | (102) |  |  | 953 |
Income tax expense (benefit) |  | 131 |  |  | 83 |  |  | (7) |  |  | 207 |  |  | (14) |  |  | 193 |
Income (Loss) From Continuing Operations |  | 618 |  |  | 238 |  |  | (8) |  |  | 848 |  |  | (88) |  |  | 760 |
Other segment items 2 |  | (1) |  |  | — |  |  | 23 |  |  | 22 |  |  | (7) |  |  | 15 |
Net Income (Loss) Available to Common Stockholders |  | $ | 617 |  |  | $ | 238 |  |  | $ | 15 |  |  | $ | 870 |  |  | $ | (95) |  |  | $ | 775 |

1 Power supply costs comprise of fuel for electric generation, purchased and interchange power, and purchased power – related parties.
2 Other segment items comprise of loss attributable to noncontrolling interests and preferred stock dividends.
88

Table of Contents

In Millions
Nine Months Ended September 30, 2025 | Electric Utility | Gas Utility | Segments Total | Other Reconciling Items | Consolidated
Consumers
Operating revenue |  | $ | 4,337 |  |  | $ | 1,670 |  |  | $ | 6,007 |  |  | $ | — |  |  | $ | 6,007 |
Operating expenses |  |  |  |  |  |  |  |  |  |
Power supply cost 1 |  | 1,707 |  |  | — |  |  | 1,707 |  |  | — |  |  | 1,707 |
Cost of gas sold |  | — |  |  | 545 |  |  | 545 |  |  | — |  |  | 545 |
Maintenance and other operating expenses |  | 806 |  |  | 331 |  |  | 1,137 |  |  | — |  |  | 1,137 |
Depreciation and amortization |  | 682 |  |  | 243 |  |  | 925 |  |  | — |  |  | 925 |
General taxes |  | 227 |  |  | 142 |  |  | 369 |  |  | — |  |  | 369 |
Total operating expenses |  | 3,422 |  |  | 1,261 |  |  | 4,683 |  |  | — |  |  | 4,683 |
Operating Income |  | 915 |  |  | 409 |  |  | 1,324 |  |  | — |  |  | 1,324 |
Other income |  | 97 |  |  | 64 |  |  | 161 |  |  | — |  |  | 161 |
Interest charges |  | 263 |  |  | 152 |  |  | 415 |  |  | 1 |  |  | 416 |
Income (Loss) Before Income Taxes |  | 749 |  |  | 321 |  |  | 1,070 |  |  | (1) |  |  | 1,069 |
Income tax expense |  | 131 |  |  | 83 |  |  | 214 |  |  | 7 |  |  | 221 |
Net Income (Loss) |  | 618 |  |  | 238 |  |  | 856 |  |  | (8) |  |  | 848 |
Other segment items 2 |  | (1) |  |  | — |  |  | (1) |  |  | — |  |  | (1) |
Net Income (Loss) Available to Common Stockholder |  | $ | 617 |  |  | $ | 238 |  |  | $ | 855 |  |  | $ | (8) |  |  | $ | 847 |

1 Power supply costs comprise of fuel for electric generation, purchased and interchange power, and purchased power – related parties.
2 Other segment items comprise of preferred stock dividends.
89

Table of Contents

In Millions
Nine Months Ended September 30, 2024 | Electric Utility | Gas Utility | NorthStar Clean Energy | Segments Total | Other Reconciling Items | Consolidated
CMS Energy, including Consumers
Operating revenue |  | $ | 3,806 |  |  | $ | 1,485 |  |  | $ | 235 |  |  | $ | 5,526 |  |  | $ | — |  |  | $ | 5,526 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |  |
Power supply cost 1 |  | 1,408 |  |  | — |  |  | 119 |  |  | 1,527 |  |  | — |  |  | 1,527 |
Cost of gas sold |  | — |  |  | 447 |  |  | 2 |  |  | 449 |  |  | — |  |  | 449 |
Maintenance and other operating expenses |  | 781 |  |  | 355 |  |  | 73 |  |  | 1,209 |  |  | 9 |  |  | 1,218 |
Depreciation and amortization |  | 651 |  |  | 226 |  |  | 36 |  |  | 913 |  |  | 1 |  |  | 914 |
General taxes |  | 214 |  |  | 132 |  |  | 10 |  |  | 356 |  |  | — |  |  | 356 |
Total operating expenses |  | 3,054 |  |  | 1,160 |  |  | 240 |  |  | 4,454 |  |  | 10 |  |  | 4,464 |
Operating Income (Loss) |  | 752 |  |  | 325 |  |  | (5) |  |  | 1,072 |  |  | (10) |  |  | 1,062 |
Other income |  | 105 |  |  | 70 |  |  | 11 |  |  | 186 |  |  | 97 |  |  | 283 |
Interest charges |  | 242 |  |  | 143 |  |  | 3 |  |  | 388 |  |  | 140 |  |  | 528 |
Income (Loss) Before Income Taxes |  | 615 |  |  | 252 |  |  | 3 |  |  | 870 |  |  | (53) |  |  | 817 |
Income tax expense (benefit) |  | 74 |  |  | 57 |  |  | (3) |  |  | 128 |  |  | (3) |  |  | 125 |
Income (Loss) From Continuing Operations |  | 541 |  |  | 195 |  |  | 6 |  |  | 742 |  |  | (50) |  |  | 692 |
Other segment items 2 |  | (1) |  |  | — |  |  | 47 |  |  | 46 |  |  | (7) |  |  | 39 |
Net Income (Loss) Available to Common Stockholders |  | $ | 540 |  |  | $ | 195 |  |  | $ | 53 |  |  | $ | 788 |  |  | $ | (57) |  |  | $ | 731 |

1 Power supply costs comprise of fuel for electric generation, purchased and interchange power, and purchased power – related parties.
2 Other segment items comprise of loss attributable to noncontrolling interests and preferred stock dividends.
90

Table of Contents

In Millions
Nine Months Ended September 30, 2024 | Electric Utility | Gas Utility | Segments Total | Other Reconciling Items | Consolidated
Consumers
Operating revenue |  | $ | 3,806 |  |  | $ | 1,485 |  |  | $ | 5,291 |  |  | $ | — |  |  | $ | 5,291 |
Operating expenses |  |  |  |  |  |  |  |  |  |
Power supply cost 1 |  | 1,408 |  |  | — |  |  | 1,408 |  |  | — |  |  | 1,408 |
Cost of gas sold |  | — |  |  | 447 |  |  | 447 |  |  | — |  |  | 447 |
Maintenance and other operating expenses |  | 781 |  |  | 355 |  |  | 1,136 |  |  | — |  |  | 1,136 |
Depreciation and amortization |  | 651 |  |  | 226 |  |  | 877 |  |  | 1 |  |  | 878 |
General taxes |  | 214 |  |  | 132 |  |  | 346 |  |  | — |  |  | 346 |
Total operating expenses |  | 3,054 |  |  | 1,160 |  |  | 4,214 |  |  | 1 |  |  | 4,215 |
Operating Income (Loss) |  | 752 |  |  | 325 |  |  | 1,077 |  |  | (1) |  |  | 1,076 |
Other income |  | 105 |  |  | 70 |  |  | 175 |  |  | — |  |  | 175 |
Interest charges |  | 242 |  |  | 143 |  |  | 385 |  |  | 1 |  |  | 386 |
Income (Loss) Before Income Taxes |  | 615 |  |  | 252 |  |  | 867 |  |  | (2) |  |  | 865 |
Income tax expense |  | 74 |  |  | 57 |  |  | 131 |  |  | 8 |  |  | 139 |
Net Income (Loss) |  | 541 |  |  | 195 |  |  | 736 |  |  | (10) |  |  | 726 |
Other segment items 2 |  | (1) |  |  | — |  |  | (1) |  |  | — |  |  | (1) |
Net Income (Loss) Available to Common Stockholder |  | $ | 540 |  |  | $ | 195 |  |  | $ | 735 |  |  | $ | (10) |  |  | $ | 725 |

1 Power supply costs comprise of fuel for electric generation, purchased and interchange power, and purchased power – related parties.
2 Other segment items comprise of preferred stock dividends.
11: Variable Interest Entities
Consolidated VIEs: In March 2025, NorthStar Clean Energy sold a 50‑percent interest in NWO Wind Equity Holdings for net proceeds of $36 million. NWO Wind Equity Holdings holds the Class B membership interest in NWO Holdco, the holding company of a 100‑MW wind project located in Paulding County, Ohio. Additionally in March 2025, NorthStar Clean Energy sold a 50‑percent interest in Delta Solar Equity Holdings for net proceeds of $8 million. Delta Solar Equity Holdings is the holding company of a 24-MW solar project located in Delta Township, Michigan.
NorthStar Clean Energy consolidates these and other entities that it does not wholly own, but for which it manages and controls the entities’ operating activities. NorthStar Clean Energy is the primary beneficiary of these entities because it has the power to direct the activities that most significantly impact the economic performance of the companies, as well as the obligation to absorb losses or the right to receive
91

Table of Contents
benefits from the companies. Presented in the following table is information about the VIEs NorthStar Clean Energy consolidates:

Consolidated VIE | NorthStar Clean Energy’s ownership interest | Description of VIE
Aviator Wind Equity Holdings | 51‑percent ownership interest 1 | Holds a Class B membership interest in Aviator Wind
Aviator Wind | Class B membership interest 2 | Holding company of a 525‑MW wind generation project in Coke County, Texas
Delta Solar Equity Holdings | 50‑percent ownership interest 1 | Holding company of a 24-MW solar generation project in Delta Township, Michigan
Newport Solar Holdings | Class B membership interest 2 | Holding company of a 180‑MW solar generation project in Jackson County, Arkansas
NWO Wind Equity Holdings | 50‑percent ownership interest 1 | Holds a Class B membership interest in NWO Holdco
NWO Holdco | Class B membership interest 2 | Holding company of a 100‑MW wind generation project in Paulding County, Ohio

1 The remaining ownership interest is presented as noncontrolling interest on CMS Energy’s consolidated balance sheets.
2 The Class A membership interest in the entity is held by a tax equity investor and is presented as noncontrolling interest on CMS Energy’s consolidated balance sheets. Under the associated limited liability company agreement, the tax equity investor is guaranteed preferred returns from the entity.
Earnings, tax attributes, and cash flows generated by the entities in which NorthStar Clean Energy holds a Class B membership are allocated among and distributed to the membership classes in accordance with the ratios specified in the associated limited liability company agreements; these ratios change over time and are not representative of the ownership interest percentages of each membership class. Since these entities’ income and cash flows are not distributed among their investors based on ownership interest percentages, NorthStar Clean Energy allocates the entities’ income (loss) among the investors by applying the hypothetical liquidation at book value method. This method calculates each investor’s earnings based on a hypothetical liquidation of the entities at the net book value of underlying assets as of the balance sheet date. The liquidation tax gain (loss) is allocated to each investor’s capital account, resulting in income (loss) equal to the period change in the investor’s capital account balance.
92

Table of Contents
Presented in the following table are the carrying values of the VIEs’ assets and liabilities included on CMS Energy’s consolidated balance sheets:

In Millions
| September 30, 2025 | December 31, 2024
Current |  |  |  |
Cash and cash equivalents |  | $ | 19 |  |  | $ | 18 |
Accounts receivable |  | 3 |  |  | 4 |
Prepayments and other current assets |  | 3 |  |  | 3 |
Non-current |  |  |  |
Plant, property, and equipment, net |  | 1,028 |  |  | 1,024 |
Other non-current assets |  | 6 |  |  | 3 |
Total assets 1 |  | $ | 1,059 |  |  | $ | 1,052 |
Current |  |  |  |
Accounts payable |  | $ | 9 |  |  | $ | 8 |
Accrued taxes |  | 1 |  |  | — |
Non-current |  |  |  |
Non-current portion of finance leases |  | 24 |  |  | 23 |
Asset retirement obligations |  | 35 |  |  | 33 |
Other non-current liabilities |  | 3 |  |  | — |
Total liabilities |  | $ | 72 |  |  | $ | 64 |

1 Assets may be used only to meet VIEs’ obligations and commitments.
NorthStar Clean Energy is obligated under certain indemnities that protect the tax equity investors against losses incurred as a result of breaches of representations and warranties under the associated limited liability company agreements. For additional details on these indemnity obligations, see Note 2, Contingencies and Commitments—Guarantees.
Consumers’ wholly-owned subsidiaries, Consumers 2014 Securitization Funding and Consumers 2023 Securitization Funding, are VIEs designed to collateralize Consumers’ securitization bonds. These entities are considered VIEs primarily because their equity capitalization is insufficient to support their operations. Consumers is the primary beneficiary of and consolidates these VIEs, as it has the power to direct the activities that most significantly impact the economic performance of the companies, as well as the obligation to absorb losses or the right to receive benefits from the companies. The VIEs’ primary assets and liabilities comprise non-current regulatory assets and long-term debt. The carrying value of the regulatory assets on Consumers’ consolidated balance sheets was $580 million at September 30, 2025 and $666 million at December 31, 2024. The carrying value of securitization bonds on Consumers’ consolidated balance sheets was $600 million at September 30, 2025 and $700 million at December 31, 2024.
Non-consolidated VIEs: NorthStar Clean Energy has variable interests in T.E.S. Filer City, Grayling, Genesee, and Craven. While NorthStar Clean Energy owns 50 percent of each partnership, it is not the primary beneficiary of any of these partnerships because decision making is shared among unrelated parties, and no one party has the ability to direct the activities that most significantly impact the entities’ economic performance, such as operations and maintenance, plant dispatch, and fuel strategy. The partners must agree on all major decisions for each of the partnerships.
93

Table of Contents
Presented in the following table is information about these partnerships:

Name | Nature of the Entity | Nature of NorthStar Clean Energy’s Involvement
T.E.S. Filer City | Coal-fueled power generator | Long-term PPA between partnership and Consumers
Employee assignment agreement
Grayling | Wood waste-fueled power generator | Long-term PPA between partnership and Consumers
Reduced dispatch agreement with Consumers 1
Operating and management contract
Genesee | Wood waste-fueled power generator | Long-term PPA between partnership and Consumers
Reduced dispatch agreement with Consumers 1
Operating and management contract
Craven | Wood waste-fueled power generator | Operating and management contract

1 Reduced dispatch agreements allow the facilities to be dispatched based on the market price of power compared with the cost of production of the plants. This results in fuel cost savings that each partnership shares with Consumers’ customers.
The creditors of these partnerships do not have recourse to the general credit of CMS Energy, NorthStar Clean Energy, or Consumers. NorthStar Clean Energy’s maximum risk exposure to these partnerships is generally limited to its investment in the partnerships, which is included in investments on CMS Energy’s consolidated balance sheets in the amount of $59 million at September 30, 2025 and $64 million at December 31, 2024.
12: Exit Activities and Asset Sales
J.H. Campbell Retirement: Under its Clean Energy Plan, Consumers had planned to retire J.H. Campbell in 2025. In order to ensure necessary staffing at J.H. Campbell through the planned retirement, Consumers implemented a retention incentive program. The terms of and Consumers’ obligations under this program have not been modified as a result of the U.S. Secretary of Energy’s emergency orders requiring the continued operation of J.H. Campbell. Consumers will make final payments due under this retention plan in November 2025. Should the U.S. Department of Energy issue additional emergency orders that require the continued operation of J.H. Campbell beyond November 2025, Consumers is prepared to implement additional retention measures to ensure appropriate staffing levels. For additional information on the emergency orders associated with J.H. Campbell, see Note 1, Regulatory Matters.
The aggregate cost of the J.H. Campbell program is estimated to be $48 million. The MPSC has approved deferred accounting treatment for these costs; these expenses are deferred as a regulatory asset. As of September 30, 2025, the cumulative cost incurred and deferred as a regulatory asset related to the J.H. Campbell retention incentive program was $47 million. Amounts deferred under the program are subsequently collected from customers over three years.
94

Table of Contents
Presented in the following table is a reconciliation of the retention benefit liability recorded in other liabilities on Consumers’ consolidated balance sheets:

In Millions
Nine Months Ended September 30 |  |  |  | 2025 | 2024 |
Retention benefit liability at beginning of period |  |  |  |  |  |  | $ | 14 |  |  | $ | 16 |  |
Costs deferred as a regulatory asset 1 |  |  |  |  |  |  | 4 |  |  | 6 |  |
Retention benefit liability at the end of the period 2 |  |  |  |  |  |  | $ | 18 |  |  | $ | 22 |  |

1 Includes $1 million for the three months ended September 30, 2025 and $3 million for the three months ended September 30, 2024.
2 Includes current portion of other liabilities of $18 million at September 30, 2025 and $9 million at September 30, 2024.
Sale of Hydroelectric Facilities: In September 2025, Consumers signed an agreement to sell its 13 river hydroelectric dams, which are located throughout Michigan, to a non-affiliated company. Additionally, Consumers signed an agreement to purchase power generated by the facilities for 30 years, at a price that reflects the counterparty’s acceptance of the risks and rewards of ownership of the facilities, including FERC licensing obligations. The agreements are contingent upon MPSC and FERC approval, which must be filed within 60 days of signing. Timing of the regulatory review process is uncertain and could extend 12 to 18 months or longer. In Consumers’ most recent electric rate case, the MPSC approved deferred accounting treatment for costs of owning and operating the hydroelectric dams pending and until completion of the transaction. At September 30, 2025, the net book value of the hydroelectric facilities was immaterial.
To ensure necessary staffing at the hydroelectric facilities through the anticipated sale, Consumers has provided current employees at the facilities with a retention incentive program. Subsequently, to ensure continued safe operation of the facilities after the sale, the buyer will offer employment to the current hydroelectric employees for a period of at least a year. The retention incentive benefits are contingent upon MPSC and FERC approval of the sale transaction.
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations
Management’s discussion and analysis of financial condition and results of operations for CMS Energy and Consumers is contained in Part I—Item 1. Financial Statements—MD&A, which is incorporated by reference herein.
Item 3. Quantitative and Qualitative Disclosures About Market Risk
There have been no material changes to market risk as previously disclosed in Part II—Item 7A. Quantitative and Qualitative Disclosures About Market Risk, in the 2024 Form 10‑K.
95

Table of Contents
Item 4. Controls and Procedures
CMS Energy
Disclosure Controls and Procedures: CMS Energy’s management, with the participation of its CEO and CFO, has evaluated the effectiveness of its disclosure controls and procedures (as such term is defined in Rules 13a‑15(e) and 15d‑15(e) under the Exchange Act) as of the end of the period covered by this report. Based on such evaluation, CMS Energy’s CEO and CFO have concluded that, as of the end of such period, its disclosure controls and procedures are effective.
Internal Control Over Financial Reporting: There have not been any changes in CMS Energy’s internal control over financial reporting (as such term is defined in Rules 13a‑15(f) and 15d‑15(f) under the Exchange Act) during the last fiscal quarter that have materially affected, or are reasonably likely to affect materially, its internal control over financial reporting.
Consumers
Disclosure Controls and Procedures: Consumers’ management, with the participation of its CEO and CFO, has evaluated the effectiveness of its disclosure controls and procedures (as such term is defined in Rules 13a‑15(e) and 15d‑15(e) under the Exchange Act) as of the end of the period covered by this report. Based on such evaluation, Consumers’ CEO and CFO have concluded that, as of the end of such period, its disclosure controls and procedures are effective.
Internal Control Over Financial Reporting: There have not been any changes in Consumers’ internal control over financial reporting (as such term is defined in Rules 13a‑15(f) and 15d‑15(f) under the Exchange Act) during the last fiscal quarter that have materially affected, or are reasonably likely to affect materially, its internal control over financial reporting.
Part II—Other Information
Item 1. Legal Proceedings
CMS Energy, Consumers, and certain of their affiliates are parties to various lawsuits and regulatory matters in the ordinary course of business. For information regarding material legal proceedings, including updates to information reported under Part I—Item 3. Legal Proceedings of the 2024 Form 10‑K, see Part I—Item 1. Financial Statements—Notes to the Unaudited Consolidated Financial Statements—Note 1, Regulatory Matters and Note 2, Contingencies and Commitments.
Item 1A. Risk Factors
There have been no material changes to the Risk Factors as previously disclosed in Part I—Item 1A. Risk Factors in the 2024 Form 10‑K, which Risk Factors are incorporated herein by reference.
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds
Unregistered Sales of Equity Securities
None.
96

Table of Contents
Issuer Repurchases of Equity Securities
Presented in the following table are CMS Energy’s repurchases of common stock for the three months ended September 30, 2025:

Period | Total Number of Shares Purchased 1 | Average Price Paid Per Share | Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs | Maximum Number of Shares That May Yet Be Purchased Under Publicly Announced Plans or Programs
July 1, 2025 to July 31, 2025 |  | 313 |  |  | $ | 69.41 |  |  | — |  |  | — |
August 1, 2025 to August 31, 2025 |  | — |  |  | — |  |  | — |  |  | — |
September 1, 2025 to September 30, 2025 |  | 2,862 |  |  | 70.23 |  |  | — |  |  | — |
Total |  | 3,175 |  |  | $ | 70.15 |  |  | — |  |  | — |

1 All of the common shares were repurchased to satisfy the minimum statutory income tax withholding obligation for common shares that have vested under the Performance Incentive Stock Plan. The value of shares repurchased is based on the market price on the vesting date.
97

Table of Contents
Item 3. Defaults Upon Senior Securities
None.
Item 4. Mine Safety Disclosures
Not applicable.
Item 5. Other Information
None.
98

Table of Contents
Item 6. Exhibits
CMS Energy’s and Consumers’ Exhibit Index
The agreements included as exhibits to this Form 10‑Q filing are included solely to provide information regarding the terms of the agreements and are not intended to provide any other factual or disclosure information about CMS Energy, Consumers, or other parties to the agreements. The agreements may contain representations and warranties made by each of the parties to each of the agreements that were made exclusively for the benefit of the parties involved in each of the agreements and should not be treated as statements of fact. The representations and warranties were made as a way to allocate risk if one or more of those statements prove to be incorrect. The statements were qualified by disclosures of the parties to each of the agreements that may not be reflected in each of the agreements. The agreements may apply standards of materiality that are different than standards applied to other investors. Additionally, the statements were made as of the date of the agreements or as specified in the agreements and have not been updated. The representations and warranties may not describe the actual state of affairs of the parties to each agreement.
Additional information about CMS Energy and Consumers may be found in this filing, at www.cmsenergy.com, at www.consumersenergy.com, and through the SEC’s website at www.sec.gov.

Exhibits |  | Description
31.1 | — | CMS Energy’s certification of the CEO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2 | — | CMS Energy’s certification of the CFO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.3 | — | Consumers’ certification of the CEO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.4 | — | Consumers’ certification of the CFO pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1 | — | CMS Energy’s certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2 | — | Consumers’ certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS | — | Inline XBRL Instance Document
101.SCH | — | Inline XBRL Taxonomy Extension Schema
101.CAL | — | Inline XBRL Taxonomy Extension Calculation Linkbase
101.DEF | — | Inline XBRL Taxonomy Extension Definition Linkbase
101.LAB | — | Inline XBRL Taxonomy Extension Labels Linkbase
101.PRE | — | Inline XBRL Taxonomy Extension Presentation Linkbase
104 | — | Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document)

99

Table of Contents
Signatures
Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. The signature for each undersigned company shall be deemed to relate only to matters having reference to such company or its subsidiary.

|  | CMS ENERGY CORPORATION
Dated: October 30, 2025 | By: | /s/ Rejji P. Hayes
|  | Rejji P. Hayes
|  | Executive Vice President and Chief Financial Officer
|  | CONSUMERS ENERGY COMPANY
Dated: October 30, 2025 | By: | /s/ Rejji P. Hayes
|  | Rejji P. Hayes
|  | Executive Vice President and Chief Financial Officer

100