00016921152024Q3FALSE00000924162024Q3FALSE--12-31--12-31xbrli:sharesiso4217:USDiso4217:USDxbrli:sharesxbrli:pureswx:contractswx:segment00016921152024-01-012024-09-300001692115swx:SouthwestGasCorporationMember2024-01-012024-09-300001692115us-gaap:CommonStockMember2024-01-012024-09-300001692115swx:PreferredStockPurchaseRightsMember2024-01-012024-09-3000016921152024-10-2500016921152024-09-3000016921152023-12-3100016921152024-07-012024-09-3000016921152023-07-012023-09-3000016921152023-01-012023-09-3000016921152022-12-3100016921152023-09-300001692115us-gaap:CommonStockMember2024-06-300001692115us-gaap:CommonStockMember2023-06-300001692115us-gaap:CommonStockMember2023-12-310001692115us-gaap:CommonStockMember2022-12-310001692115us-gaap:CommonStockMember2024-07-012024-09-300001692115us-gaap:CommonStockMember2023-07-012023-09-300001692115us-gaap:CommonStockMember2024-01-012024-09-300001692115us-gaap:CommonStockMember2023-01-012023-09-300001692115us-gaap:CommonStockMember2024-09-300001692115us-gaap:CommonStockMember2023-09-300001692115us-gaap:AdditionalPaidInCapitalMember2024-06-300001692115us-gaap:AdditionalPaidInCapitalMember2023-06-300001692115us-gaap:AdditionalPaidInCapitalMember2023-12-310001692115us-gaap:AdditionalPaidInCapitalMember2022-12-310001692115us-gaap:AdditionalPaidInCapitalMember2024-07-012024-09-300001692115us-gaap:AdditionalPaidInCapitalMember2023-07-012023-09-300001692115us-gaap:AdditionalPaidInCapitalMember2024-01-012024-09-300001692115us-gaap:AdditionalPaidInCapitalMember2023-01-012023-09-300001692115us-gaap:AdditionalPaidInCapitalMemberus-gaap:IPOMember2024-01-012024-09-300001692115us-gaap:AdditionalPaidInCapitalMember2024-09-300001692115us-gaap:AdditionalPaidInCapitalMember2023-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-06-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-06-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-12-310001692115us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-12-310001692115us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-01-012024-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-07-012024-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-07-012023-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-01-012023-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMember2024-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-09-300001692115us-gaap:RetainedEarningsMember2024-06-300001692115us-gaap:RetainedEarningsMember2023-06-300001692115us-gaap:RetainedEarningsMember2023-12-310001692115us-gaap:RetainedEarningsMember2022-12-310001692115us-gaap:RetainedEarningsMember2024-07-012024-09-300001692115us-gaap:RetainedEarningsMember2023-07-012023-09-300001692115us-gaap:RetainedEarningsMember2024-01-012024-09-300001692115us-gaap:RetainedEarningsMember2023-01-012023-09-300001692115us-gaap:RetainedEarningsMember2024-09-300001692115us-gaap:RetainedEarningsMember2023-09-300001692115us-gaap:ParentMember2024-09-300001692115us-gaap:ParentMember2023-09-300001692115us-gaap:NoncontrollingInterestMember2024-06-300001692115us-gaap:NoncontrollingInterestMember2023-06-300001692115us-gaap:NoncontrollingInterestMember2023-12-310001692115us-gaap:NoncontrollingInterestMember2022-12-310001692115us-gaap:NoncontrollingInterestMemberus-gaap:IPOMember2024-01-012024-09-300001692115us-gaap:NoncontrollingInterestMember2024-07-012024-09-300001692115us-gaap:NoncontrollingInterestMember2024-01-012024-09-300001692115us-gaap:NoncontrollingInterestMember2024-09-300001692115us-gaap:NoncontrollingInterestMember2023-09-300001692115swx:SouthwestGasCorporationMember2024-09-300001692115swx:SouthwestGasCorporationMember2023-12-310001692115us-gaap:NonrelatedPartyMemberswx:SouthwestGasCorporationMember2024-09-300001692115us-gaap:NonrelatedPartyMemberswx:SouthwestGasCorporationMember2023-12-310001692115us-gaap:RelatedPartyMemberswx:SouthwestGasCorporationMember2024-09-300001692115us-gaap:RelatedPartyMemberswx:SouthwestGasCorporationMember2023-12-310001692115swx:SouthwestGasCorporationMember2024-07-012024-09-300001692115swx:SouthwestGasCorporationMember2023-07-012023-09-300001692115swx:SouthwestGasCorporationMember2023-01-012023-09-300001692115swx:SouthwestGasCorporationMember2022-12-310001692115swx:SouthwestGasCorporationMember2023-09-300001692115us-gaap:CommonStockMemberswx:SouthwestGasCorporationMember2024-06-300001692115us-gaap:CommonStockMemberswx:SouthwestGasCorporationMember2023-06-300001692115us-gaap:CommonStockMemberswx:SouthwestGasCorporationMember2023-12-310001692115us-gaap:CommonStockMemberswx:SouthwestGasCorporationMember2022-12-310001692115us-gaap:AdditionalPaidInCapitalMemberswx:SouthwestGasCorporationMember2024-06-300001692115us-gaap:AdditionalPaidInCapitalMemberswx:SouthwestGasCorporationMember2023-06-300001692115us-gaap:AdditionalPaidInCapitalMemberswx:SouthwestGasCorporationMember2023-12-310001692115us-gaap:AdditionalPaidInCapitalMemberswx:SouthwestGasCorporationMember2022-12-310001692115us-gaap:AdditionalPaidInCapitalMemberswx:SouthwestGasCorporationMember2024-07-012024-09-300001692115us-gaap:AdditionalPaidInCapitalMemberswx:SouthwestGasCorporationMember2023-07-012023-09-300001692115us-gaap:AdditionalPaidInCapitalMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115us-gaap:AdditionalPaidInCapitalMemberswx:SouthwestGasCorporationMember2023-01-012023-09-300001692115us-gaap:AdditionalPaidInCapitalMemberswx:SouthwestGasCorporationMember2024-09-300001692115us-gaap:AdditionalPaidInCapitalMemberswx:SouthwestGasCorporationMember2023-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMemberswx:SouthwestGasCorporationMember2024-06-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMemberswx:SouthwestGasCorporationMember2023-06-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMemberswx:SouthwestGasCorporationMember2023-12-310001692115us-gaap:AccumulatedOtherComprehensiveIncomeMemberswx:SouthwestGasCorporationMember2022-12-310001692115us-gaap:AccumulatedOtherComprehensiveIncomeMemberswx:SouthwestGasCorporationMember2024-07-012024-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMemberswx:SouthwestGasCorporationMember2023-07-012023-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMemberswx:SouthwestGasCorporationMember2023-01-012023-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMemberswx:SouthwestGasCorporationMember2024-09-300001692115us-gaap:AccumulatedOtherComprehensiveIncomeMemberswx:SouthwestGasCorporationMember2023-09-300001692115us-gaap:RetainedEarningsMemberswx:SouthwestGasCorporationMember2024-06-300001692115us-gaap:RetainedEarningsMemberswx:SouthwestGasCorporationMember2023-06-300001692115us-gaap:RetainedEarningsMemberswx:SouthwestGasCorporationMember2023-12-310001692115us-gaap:RetainedEarningsMemberswx:SouthwestGasCorporationMember2022-12-310001692115us-gaap:RetainedEarningsMemberswx:SouthwestGasCorporationMember2024-07-012024-09-300001692115us-gaap:RetainedEarningsMemberswx:SouthwestGasCorporationMember2023-07-012023-09-300001692115us-gaap:RetainedEarningsMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115us-gaap:RetainedEarningsMemberswx:SouthwestGasCorporationMember2023-01-012023-09-300001692115us-gaap:RetainedEarningsMemberswx:SouthwestGasCorporationMember2024-09-300001692115us-gaap:RetainedEarningsMemberswx:SouthwestGasCorporationMember2023-09-300001692115us-gaap:DiscontinuedOperationsDisposedOfBySaleMemberswx:MountainWestMember2022-12-310001692115swx:CenturiGroupInc.Member2024-04-300001692115us-gaap:SubsequentEventMember2024-10-152024-10-150001692115srt:RevisionOfPriorPeriodErrorCorrectionAdjustmentMember2021-01-012021-12-310001692115srt:RevisionOfPriorPeriodErrorCorrectionAdjustmentMember2022-01-012022-12-310001692115srt:RevisionOfPriorPeriodErrorCorrectionAdjustmentMember2023-01-012023-03-310001692115swx:CertainAssetsAssociatedWithPreviousCorporateHeadquartersMember2023-03-310001692115swx:CertainAssetsAssociatedWithPreviousCorporateHeadquartersMember2023-01-012023-12-310001692115us-gaap:MoneyMarketFundsMember2024-09-300001692115us-gaap:MoneyMarketFundsMember2023-12-310001692115us-gaap:MoneyMarketFundsMemberswx:SouthwestGasCorporationMember2024-09-300001692115us-gaap:MoneyMarketFundsMemberswx:SouthwestGasCorporationMember2023-12-310001692115swx:NaturalGasDistributionSegmentMember2023-12-310001692115swx:UtilityInfrastructureServicesSegmentMember2023-12-310001692115swx:NaturalGasDistributionSegmentMember2024-01-012024-09-300001692115swx:UtilityInfrastructureServicesSegmentMember2024-01-012024-09-300001692115swx:NaturalGasDistributionSegmentMember2024-09-300001692115swx:UtilityInfrastructureServicesSegmentMember2024-09-300001692115swx:CenturiMountainWestAndSouthwestGasHoldingsInc.Member2024-07-012024-09-300001692115swx:CenturiMountainWestAndSouthwestGasHoldingsInc.Member2023-07-012023-09-300001692115swx:CenturiMountainWestAndSouthwestGasHoldingsInc.Member2024-01-012024-09-300001692115swx:CenturiMountainWestAndSouthwestGasHoldingsInc.Member2023-01-012023-09-300001692115us-gaap:CorporateNonSegmentMember2024-07-012024-09-300001692115us-gaap:CorporateNonSegmentMember2023-07-012023-09-300001692115us-gaap:CorporateNonSegmentMember2024-01-012024-09-300001692115us-gaap:CorporateNonSegmentMember2023-01-012023-09-300001692115swx:LinetecServicesLLCMemberswx:PreviousOwnerOfLinetecMember2018-11-300001692115swx:LinetecServicesLLCMemberswx:PreviousOwnerOfLinetecMember2022-03-3100016921152023-03-012023-03-310001692115swx:CenturiGroupInc.Member2023-04-012023-04-300001692115swx:LinetecServicesLLCMemberswx:PreviousOwnerOfLinetecMember2023-04-300001692115swx:LinetecServicesLLCMemberswx:PreviousOwnerOfLinetecMember2024-03-310001692115swx:DrumMemberswx:CertainMembersOfRiggsDistlerManagementMember2024-09-300001692115swx:VariableRateComponentThreeMemberswx:PromissoryNoteMember2024-01-012024-09-300001692115swx:DrumMemberswx:CenturiGroupInc.Member2024-01-012024-03-310001692115swx:DrumMember2024-09-300001692115swx:DrumMemberswx:CenturiGroupInc.Member2024-09-300001692115swx:LinetecServicesLLCMember2023-12-310001692115swx:DrumMember2023-12-310001692115swx:LinetecServicesLLCMember2024-01-012024-09-300001692115swx:DrumMember2024-01-012024-09-300001692115swx:LinetecServicesLLCMember2024-09-300001692115us-gaap:OtherPensionPlansDefinedBenefitMember2024-07-012024-09-300001692115us-gaap:OtherPensionPlansDefinedBenefitMember2023-07-012023-09-300001692115us-gaap:OtherPensionPlansDefinedBenefitMember2024-01-012024-09-300001692115us-gaap:OtherPensionPlansDefinedBenefitMember2023-01-012023-09-300001692115us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember2024-07-012024-09-300001692115us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember2023-07-012023-09-300001692115us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember2024-01-012024-09-300001692115us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember2023-01-012023-09-300001692115us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2024-07-012024-09-300001692115us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-07-012023-09-300001692115us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2024-01-012024-09-300001692115us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-01-012023-09-300001692115swx:ResidentialMemberswx:SouthwestGasCorporationMember2024-07-012024-09-300001692115swx:ResidentialMemberswx:SouthwestGasCorporationMember2023-07-012023-09-300001692115swx:ResidentialMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115swx:ResidentialMemberswx:SouthwestGasCorporationMember2023-01-012023-09-300001692115swx:SmallCommercialMemberswx:SouthwestGasCorporationMember2024-07-012024-09-300001692115swx:SmallCommercialMemberswx:SouthwestGasCorporationMember2023-07-012023-09-300001692115swx:SmallCommercialMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115swx:SmallCommercialMemberswx:SouthwestGasCorporationMember2023-01-012023-09-300001692115swx:LargeCommercialMemberswx:SouthwestGasCorporationMember2024-07-012024-09-300001692115swx:LargeCommercialMemberswx:SouthwestGasCorporationMember2023-07-012023-09-300001692115swx:LargeCommercialMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115swx:LargeCommercialMemberswx:SouthwestGasCorporationMember2023-01-012023-09-300001692115swx:IndustrialOrOtherMemberswx:SouthwestGasCorporationMember2024-07-012024-09-300001692115swx:IndustrialOrOtherMemberswx:SouthwestGasCorporationMember2023-07-012023-09-300001692115swx:IndustrialOrOtherMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115swx:IndustrialOrOtherMemberswx:SouthwestGasCorporationMember2023-01-012023-09-300001692115swx:TransportationMemberswx:SouthwestGasCorporationMember2024-07-012024-09-300001692115swx:TransportationMemberswx:SouthwestGasCorporationMember2023-07-012023-09-300001692115swx:TransportationMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115swx:TransportationMemberswx:SouthwestGasCorporationMember2023-01-012023-09-300001692115swx:CenturiGroupInc.Memberswx:GasInfrastructureServicesMember2024-07-012024-09-300001692115swx:CenturiGroupInc.Memberswx:GasInfrastructureServicesMember2023-07-012023-09-300001692115swx:CenturiGroupInc.Memberswx:GasInfrastructureServicesMember2024-01-012024-09-300001692115swx:CenturiGroupInc.Memberswx:GasInfrastructureServicesMember2023-01-012023-09-300001692115swx:CenturiGroupInc.Memberswx:ElectricPowerInfrastructureServicesMember2024-07-012024-09-300001692115swx:CenturiGroupInc.Memberswx:ElectricPowerInfrastructureServicesMember2023-07-012023-09-300001692115swx:CenturiGroupInc.Memberswx:ElectricPowerInfrastructureServicesMember2024-01-012024-09-300001692115swx:CenturiGroupInc.Memberswx:ElectricPowerInfrastructureServicesMember2023-01-012023-09-300001692115swx:CenturiGroupInc.Memberswx:OtherInfrastructureServicesMember2024-07-012024-09-300001692115swx:CenturiGroupInc.Memberswx:OtherInfrastructureServicesMember2023-07-012023-09-300001692115swx:CenturiGroupInc.Memberswx:OtherInfrastructureServicesMember2024-01-012024-09-300001692115swx:CenturiGroupInc.Memberswx:OtherInfrastructureServicesMember2023-01-012023-09-300001692115swx:CenturiGroupInc.Member2024-07-012024-09-300001692115swx:CenturiGroupInc.Member2023-07-012023-09-300001692115swx:CenturiGroupInc.Member2024-01-012024-09-300001692115swx:CenturiGroupInc.Member2023-01-012023-09-300001692115swx:CenturiGroupInc.Membersrt:ScenarioPreviouslyReportedMemberswx:GasInfrastructureServicesMember2023-07-012023-09-300001692115swx:CenturiGroupInc.Membersrt:ScenarioPreviouslyReportedMemberswx:ElectricPowerInfrastructureServicesMember2023-07-012023-09-300001692115swx:CenturiGroupInc.Membersrt:ScenarioPreviouslyReportedMemberswx:OtherInfrastructureServicesMember2023-07-012023-09-300001692115swx:CenturiGroupInc.Membersrt:ScenarioPreviouslyReportedMemberswx:GasInfrastructureServicesMember2023-01-012023-09-300001692115swx:CenturiGroupInc.Membersrt:ScenarioPreviouslyReportedMemberswx:ElectricPowerInfrastructureServicesMember2023-01-012023-09-300001692115swx:CenturiGroupInc.Membersrt:ScenarioPreviouslyReportedMemberswx:OtherInfrastructureServicesMember2023-01-012023-09-300001692115swx:MasterServicesAgreementMemberswx:CenturiGroupInc.Member2024-07-012024-09-300001692115swx:MasterServicesAgreementMemberswx:CenturiGroupInc.Member2023-07-012023-09-300001692115swx:MasterServicesAgreementMemberswx:CenturiGroupInc.Member2024-01-012024-09-300001692115swx:MasterServicesAgreementMemberswx:CenturiGroupInc.Member2023-01-012023-09-300001692115swx:BidContractMemberswx:CenturiGroupInc.Member2024-07-012024-09-300001692115swx:BidContractMemberswx:CenturiGroupInc.Member2023-07-012023-09-300001692115swx:BidContractMemberswx:CenturiGroupInc.Member2024-01-012024-09-300001692115swx:BidContractMemberswx:CenturiGroupInc.Member2023-01-012023-09-300001692115swx:UnitPricedContractsMemberswx:CenturiGroupInc.Member2024-07-012024-09-300001692115swx:UnitPricedContractsMemberswx:CenturiGroupInc.Member2023-07-012023-09-300001692115swx:UnitPricedContractsMemberswx:CenturiGroupInc.Member2024-01-012024-09-300001692115swx:UnitPricedContractsMemberswx:CenturiGroupInc.Member2023-01-012023-09-300001692115us-gaap:FixedPriceContractMemberswx:CenturiGroupInc.Member2024-07-012024-09-300001692115us-gaap:FixedPriceContractMemberswx:CenturiGroupInc.Member2023-07-012023-09-300001692115us-gaap:FixedPriceContractMemberswx:CenturiGroupInc.Member2024-01-012024-09-300001692115us-gaap:FixedPriceContractMemberswx:CenturiGroupInc.Member2023-01-012023-09-300001692115us-gaap:TimeAndMaterialsContractMemberswx:CenturiGroupInc.Member2024-07-012024-09-300001692115us-gaap:TimeAndMaterialsContractMemberswx:CenturiGroupInc.Member2023-07-012023-09-300001692115us-gaap:TimeAndMaterialsContractMemberswx:CenturiGroupInc.Member2024-01-012024-09-300001692115us-gaap:TimeAndMaterialsContractMemberswx:CenturiGroupInc.Member2023-01-012023-09-300001692115swx:CenturiGroupInc.Member2024-09-3000016921152024-10-01swx:CenturiGroupInc.Member2024-09-300001692115swx:BilledOnCompletedContractsAndContractsInProgressMemberswx:UtilityInfrastructureServicesSegmentMember2024-09-300001692115swx:BilledOnCompletedContractsAndContractsInProgressMemberswx:UtilityInfrastructureServicesSegmentMember2023-12-310001692115swx:OtherReceivablesMemberswx:UtilityInfrastructureServicesSegmentMember2024-09-300001692115swx:OtherReceivablesMemberswx:UtilityInfrastructureServicesSegmentMember2023-12-310001692115swx:CenturiGroupInc.Member2024-09-012024-09-300001692115swx:ATMProgramMember2024-08-062024-08-060001692115swx:OmnibusIncentivePlanMember2024-01-012024-09-300001692115swx:DividendReinvestmentAndStockPurchasePlanMember2024-01-012024-09-300001692115swx:Debentures8SeriesDue2026Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:Debentures8SeriesDue2026Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:Debentures8SeriesDue2026Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:Debentures8SeriesDue2026Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:Debentures8SeriesDue2026Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesMediumTermNotes7.92SeriesDue2027Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesMediumTermNotes7.92SeriesDue2027Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesMediumTermNotes7.92SeriesDue2027Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesMediumTermNotes7.92SeriesDue2027Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesMediumTermNotes7.92SeriesDue2027Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesMediumTermNotes6.76SeriesDue2027Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesMediumTermNotes6.76SeriesDue2027Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesMediumTermNotes6.76SeriesDue2027Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesMediumTermNotes6.76SeriesDue2027Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesMediumTermNotes6.76SeriesDue2027Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes5.8Due2027Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes5.8Due2027Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes5.8Due2027Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes5.8Due2027Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes5.8Due2027Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes3.7Due2028Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes3.7Due2028Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes3.7Due2028Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes3.7Due2028Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes3.7Due2028Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes5.45Due2028Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes5.45Due2028Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes5.45Due2028Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes5.45Due2028Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes5.45Due2028Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes2.2Due2030Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes2.2Due2030Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes2.2Due2030Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes2.2Due2030Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes2.2Due2030Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes4.05Due2032Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes4.05Due2032Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes4.05Due2032Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes4.05Due2032Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes4.05Due2032Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes6.1Due2041Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes6.1Due2041Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes6.1Due2041Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes6.1Due2041Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes6.1Due2041Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes4.875Due2043Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes4.875Due2043Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes4.875Due2043Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes4.875Due2043Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes4.875Due2043Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes3.8Due2046Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes3.8Due2046Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes3.8Due2046Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes3.8Due2046Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes3.8Due2046Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes4.15Due2049Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes4.15Due2049Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes4.15Due2049Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes4.15Due2049Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes4.15Due2049Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes3.18Due2051Memberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes3.18Due2051Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes3.18Due2051Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115swx:DebenturesNotes3.18Due2051Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115swx:DebenturesNotes3.18Due2051Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2024-09-300001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:DebenturesMember2023-12-310001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:RevolvingCreditFacilityAndCommercialPaperMember2024-09-300001692115us-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:RevolvingCreditFacilityAndCommercialPaperMember2024-09-300001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:RevolvingCreditFacilityAndCommercialPaperMember2023-12-310001692115us-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:RevolvingCreditFacilityAndCommercialPaperMember2023-12-310001692115swx:VariableRateBondsTaxExemptSeriesADue2028Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2024-09-300001692115swx:VariableRateBondsTaxExemptSeriesADue2028Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2024-09-300001692115swx:VariableRateBondsTaxExemptSeriesADue2028Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2023-12-310001692115swx:VariableRateBondsTaxExemptSeriesADue2028Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2023-12-310001692115swx:VariableRateBonds2003SeriesADue2038Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2024-09-300001692115swx:VariableRateBonds2003SeriesADue2038Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2024-09-300001692115swx:VariableRateBonds2003SeriesADue2038Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2023-12-310001692115swx:VariableRateBonds2003SeriesADue2038Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2023-12-310001692115swx:VariableRateBonds2008SeriesADue2038Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2024-09-300001692115swx:VariableRateBonds2008SeriesADue2038Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2024-09-300001692115swx:VariableRateBonds2008SeriesADue2038Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2023-12-310001692115swx:VariableRateBonds2008SeriesADue2038Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2023-12-310001692115swx:VariableRateBonds2009SeriesADue2039Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2024-09-300001692115swx:VariableRateBonds2009SeriesADue2039Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2024-09-300001692115swx:VariableRateBonds2009SeriesADue2039Memberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2023-12-310001692115swx:VariableRateBonds2009SeriesADue2039Memberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2023-12-310001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2024-09-300001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMemberswx:IndustrialDevelopmentRevenueBondsMember2023-12-310001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMember2024-09-300001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:SouthwestGasCorporationMember2023-12-310001692115swx:CenturiSecuredTermLoanFacilityMemberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:CenturiGroupInc.Memberus-gaap:SecuredDebtMember2024-09-300001692115swx:CenturiSecuredTermLoanFacilityMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:CenturiGroupInc.Memberus-gaap:SecuredDebtMember2024-09-300001692115swx:CenturiSecuredTermLoanFacilityMemberus-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:CenturiGroupInc.Memberus-gaap:SecuredDebtMember2023-12-310001692115swx:CenturiSecuredTermLoanFacilityMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:CenturiGroupInc.Memberus-gaap:SecuredDebtMember2023-12-310001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:CenturiGroupInc.Memberswx:CenturiSecuredRevolvingCreditFacilityMember2024-09-300001692115us-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:CenturiGroupInc.Memberswx:CenturiSecuredRevolvingCreditFacilityMember2024-09-300001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberswx:CenturiGroupInc.Memberswx:CenturiSecuredRevolvingCreditFacilityMember2023-12-310001692115us-gaap:EstimateOfFairValueFairValueDisclosureMemberswx:CenturiGroupInc.Memberswx:CenturiSecuredRevolvingCreditFacilityMember2023-12-310001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001692115us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:OtherDebtSecuritiesMember2024-09-300001692115us-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001692115us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:OtherDebtSecuritiesMember2023-12-310001692115us-gaap:CarryingReportedAmountFairValueDisclosureMember2024-09-300001692115us-gaap:CarryingReportedAmountFairValueDisclosureMember2023-12-310001692115swx:SouthwestGasCorporationMemberswx:A400MillionCreditFacilityMember2024-09-300001692115swx:SouthwestGasCorporationMemberswx:A400MillionCreditFacilityMemberus-gaap:SecuredOvernightFinancingRateSofrMember2024-01-012024-09-300001692115swx:SouthwestGasCorporationMemberswx:A400MillionCreditFacilityMemberus-gaap:BaseRateMember2024-01-012024-09-300001692115swx:CenturiSecuredTermLoanFacilityAndRevolvingCreditFacilityMemberswx:CenturiGroupInc.Member2024-09-300001692115swx:CenturiGroupInc.Memberus-gaap:RevolvingCreditFacilityMemberus-gaap:SecuredOvernightFinancingRateSofrMembersrt:MinimumMember2024-01-012024-09-300001692115swx:CenturiGroupInc.Memberus-gaap:RevolvingCreditFacilityMemberus-gaap:SecuredOvernightFinancingRateSofrMembersrt:MaximumMember2024-01-012024-09-300001692115swx:CenturiGroupInc.Memberus-gaap:RevolvingCreditFacilityMemberswx:CORRAMembersrt:MinimumMember2024-01-012024-09-300001692115swx:CenturiGroupInc.Memberus-gaap:RevolvingCreditFacilityMemberswx:CORRAMembersrt:MaximumMember2024-01-012024-09-300001692115swx:CenturiSecuredTermLoanFacilityMemberswx:CenturiGroupInc.Memberus-gaap:BaseRateMember2024-01-012024-09-300001692115swx:CenturiSecuredTermLoanFacilityMemberswx:CenturiGroupInc.Memberus-gaap:SecuredOvernightFinancingRateSofrMember2024-01-012024-09-300001692115swx:CenturiGroupInc.Memberswx:CenturiSecuredRevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-09-300001692115swx:CenturiTermLoanFacilityMemberswx:CenturiGroupInc.Member2024-09-300001692115swx:CenturiGroupInc.Memberus-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMember2024-09-300001692115us-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMemberswx:DebtInstrumentCovenantPeriodOneMember2024-03-220001692115us-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMemberswx:DebtInstrumentCovenantPeriodTwoMember2024-03-220001692115us-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMemberswx:DebtInstrumentCovenantPeriodThreeMember2024-03-220001692115us-gaap:RevolvingCreditFacilityMemberus-gaap:LineOfCreditMemberswx:DebtInstrumentCovenantPeriodFourMember2024-03-220001692115swx:CenturiGroupInc.Member2024-04-012024-04-300001692115swx:CenturiGroupInc.Memberswx:CenturiSecuredRevolvingCreditFacilityMember2024-04-012024-04-300001692115swx:CenturiTermLoanFacilityMemberswx:CenturiGroupInc.Member2024-04-012024-04-300001692115swx:A300MillionCreditFacilityMember2024-09-300001692115swx:A550MillionTermLoanCreditAgreementDueOctober2024Memberus-gaap:SecuredDebtMember2023-04-300001692115swx:TermLoanCreditAgreementDueJuly312025Memberus-gaap:SecuredOvernightFinancingRateSofrMember2024-07-312024-07-310001692115swx:TermLoanCreditAgreementDueJuly312025Memberus-gaap:SecuredOvernightFinancingRateSofrMember2024-08-012024-08-010001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMemberswx:SouthwestGasCorporationMember2024-07-012024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMemberswx:SouthwestGasCorporationMember2023-07-012023-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMemberswx:SouthwestGasCorporationMember2024-07-012024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMemberswx:SouthwestGasCorporationMember2023-07-012023-09-300001692115swx:AccumulatedDefinedBenefitPlansAdjustmentRegulartoryAdjustmentAttributabletoParentMemberswx:SouthwestGasCorporationMember2024-07-012024-09-300001692115swx:AccumulatedDefinedBenefitPlansAdjustmentRegulartoryAdjustmentAttributabletoParentMemberswx:SouthwestGasCorporationMember2023-07-012023-09-300001692115us-gaap:AccumulatedTranslationAdjustmentMember2024-07-012024-09-300001692115us-gaap:AccumulatedTranslationAdjustmentMember2023-07-012023-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMemberswx:SouthwestGasCorporationMember2023-01-012023-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMemberswx:SouthwestGasCorporationMember2023-01-012023-09-300001692115swx:AccumulatedDefinedBenefitPlansAdjustmentRegulartoryAdjustmentAttributabletoParentMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115swx:AccumulatedDefinedBenefitPlansAdjustmentRegulartoryAdjustmentAttributabletoParentMemberswx:SouthwestGasCorporationMember2023-01-012023-09-300001692115us-gaap:AccumulatedTranslationAdjustmentMember2024-01-012024-09-300001692115us-gaap:AccumulatedTranslationAdjustmentMember2023-01-012023-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2023-12-310001692115us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2023-12-310001692115us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2024-01-012024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember2024-01-012024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2024-01-012024-09-300001692115swx:AccumulatedDefinedBenefitPlansAdjustmentRegulatoryAdjustmentAttributableToParentMember2024-01-012024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2024-01-012024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2024-01-012024-09-300001692115us-gaap:AociIncludingPortionAttributableToNoncontrollingInterestMember2024-01-012024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2024-09-300001692115us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberswx:SouthwestGasCorporationMember2023-12-310001692115swx:AccumulatedDefinedBenefitPlansAdjustmentRegulatoryAdjustmentAttributableToParentMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberswx:SouthwestGasCorporationMember2024-01-012024-09-300001692115us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberswx:SouthwestGasCorporationMember2024-09-300001692115us-gaap:RelatedPartyMemberswx:CenturiGroupInc.Member2024-09-300001692115us-gaap:RelatedPartyMemberswx:CenturiGroupInc.Member2023-12-310001692115us-gaap:OperatingSegmentsMemberswx:NaturalGasDistributionSegmentMember2024-07-012024-09-300001692115us-gaap:OperatingSegmentsMemberswx:UtilityInfrastructureServicesSegmentMember2024-07-012024-09-300001692115us-gaap:OperatingSegmentsMemberswx:PipelineAndStorageSegmentMember2024-07-012024-09-300001692115us-gaap:OperatingSegmentsMember2024-07-012024-09-300001692115us-gaap:IntersegmentEliminationMemberswx:NaturalGasDistributionSegmentMember2024-07-012024-09-300001692115us-gaap:IntersegmentEliminationMemberswx:UtilityInfrastructureServicesSegmentMember2024-07-012024-09-300001692115us-gaap:IntersegmentEliminationMemberswx:PipelineAndStorageSegmentMember2024-07-012024-09-300001692115us-gaap:IntersegmentEliminationMember2024-07-012024-09-300001692115swx:NaturalGasDistributionSegmentMember2024-07-012024-09-300001692115swx:UtilityInfrastructureServicesSegmentMember2024-07-012024-09-300001692115swx:PipelineAndStorageSegmentMember2024-07-012024-09-300001692115us-gaap:MaterialReconcilingItemsMember2024-07-012024-09-300001692115us-gaap:OperatingSegmentsMemberswx:NaturalGasDistributionSegmentMember2023-07-012023-09-300001692115us-gaap:OperatingSegmentsMemberswx:UtilityInfrastructureServicesSegmentMember2023-07-012023-09-300001692115us-gaap:OperatingSegmentsMemberswx:PipelineAndStorageSegmentMember2023-07-012023-09-300001692115us-gaap:OperatingSegmentsMember2023-07-012023-09-300001692115us-gaap:IntersegmentEliminationMemberswx:NaturalGasDistributionSegmentMember2023-07-012023-09-300001692115us-gaap:IntersegmentEliminationMemberswx:UtilityInfrastructureServicesSegmentMember2023-07-012023-09-300001692115us-gaap:IntersegmentEliminationMemberswx:PipelineAndStorageSegmentMember2023-07-012023-09-300001692115us-gaap:IntersegmentEliminationMember2023-07-012023-09-300001692115swx:NaturalGasDistributionSegmentMember2023-07-012023-09-300001692115swx:UtilityInfrastructureServicesSegmentMember2023-07-012023-09-300001692115swx:PipelineAndStorageSegmentMember2023-07-012023-09-300001692115us-gaap:MaterialReconcilingItemsMember2023-07-012023-09-300001692115us-gaap:OperatingSegmentsMemberswx:NaturalGasDistributionSegmentMember2024-01-012024-09-300001692115us-gaap:OperatingSegmentsMemberswx:UtilityInfrastructureServicesSegmentMember2024-01-012024-09-300001692115us-gaap:OperatingSegmentsMemberswx:PipelineAndStorageSegmentMember2024-01-012024-09-300001692115us-gaap:OperatingSegmentsMember2024-01-012024-09-300001692115us-gaap:IntersegmentEliminationMemberswx:NaturalGasDistributionSegmentMember2024-01-012024-09-300001692115us-gaap:IntersegmentEliminationMemberswx:UtilityInfrastructureServicesSegmentMember2024-01-012024-09-300001692115us-gaap:IntersegmentEliminationMemberswx:PipelineAndStorageSegmentMember2024-01-012024-09-300001692115us-gaap:IntersegmentEliminationMember2024-01-012024-09-300001692115swx:PipelineAndStorageSegmentMember2024-01-012024-09-300001692115us-gaap:MaterialReconcilingItemsMember2024-01-012024-09-300001692115us-gaap:OperatingSegmentsMemberswx:NaturalGasDistributionSegmentMember2023-01-012023-09-300001692115us-gaap:OperatingSegmentsMemberswx:UtilityInfrastructureServicesSegmentMember2023-01-012023-09-300001692115us-gaap:OperatingSegmentsMemberswx:PipelineAndStorageSegmentMember2023-01-012023-09-300001692115us-gaap:OperatingSegmentsMember2023-01-012023-09-300001692115us-gaap:IntersegmentEliminationMemberswx:NaturalGasDistributionSegmentMember2023-01-012023-09-300001692115us-gaap:IntersegmentEliminationMemberswx:UtilityInfrastructureServicesSegmentMember2023-01-012023-09-300001692115us-gaap:IntersegmentEliminationMemberswx:PipelineAndStorageSegmentMember2023-01-012023-09-300001692115us-gaap:IntersegmentEliminationMember2023-01-012023-09-300001692115swx:NaturalGasDistributionSegmentMember2023-01-012023-09-300001692115swx:UtilityInfrastructureServicesSegmentMember2023-01-012023-09-300001692115swx:PipelineAndStorageSegmentMember2023-01-012023-09-300001692115us-gaap:MaterialReconcilingItemsMember2023-01-012023-09-300001692115swx:A550MillionTermLoanCreditAgreementDueOctober2024Memberus-gaap:SecuredDebtMember2024-07-012024-09-300001692115swx:IPOExcludingOverAllotmentOptionMemberswx:CenturiGroupInc.Member2024-04-012024-04-300001692115us-gaap:IPOMemberswx:CenturiGroupInc.Member2024-04-300001692115us-gaap:IPOMemberswx:CenturiGroupInc.Member2024-04-012024-04-300001692115us-gaap:OverAllotmentOptionMemberswx:CenturiGroupInc.Member2024-04-012024-04-300001692115swx:CenturiGroupInc.Memberus-gaap:OverAllotmentOptionMemberswx:IchanPartnersLPIchanPartnersMasterFundLPMember2024-04-012024-04-30

美国
证券交易委员会
华盛顿特区20549
10-Q
根据1934年证券交易法第13或15(d)节的季度报告
截至季度结束日期的财务报告2024年9月30日
或者
根据1934年证券交易法第13或15(d)节的转型报告书
佣金
    文件编号    
  注册人按其章程规定的确切名称
主要办公地址和电话号码

公司所在地:
纳税人识别号
雇主识别号码
001-37976 西南燃料币控股有限公司。特拉华州81-3881866
8360南Durango路。
拉斯维加斯内华达89113
(702) 876-7237
1-7850西南燃料币公司。加利福尼亚州88-0085720
8360南Durango路。
拉斯维加斯内华达89113
(702) 876-7237
在法案第12(b)条的规定下注册的证券:
每一类的名称交易代码在其上注册的交易所的名称
西南燃料币控股有限公司普通股,每股面值$1SWX请使用moomoo账号登录查看New York Stock Exchange
优先股票购买权无数据请使用moomoo账号登录查看New York Stock Exchange
请用勾号表示每个注册者是否:(1)已按照1934年证券交易所法第13或15(d)条的规定递交了过去12个月内(或每个注册者被要求递交此类报告的更短期限)应当递交的所有报告,并且(2)在过去90天里一直受到该类报告要求的约束。Yes      否  
请通过复选标记指示每个注册人在过去12个月内(或每个注册人要求提交此类文件的较短期间内)是否按照第405条规则和S-t法规第232.405章规定提交了每个交互式数据文件。Yes      否  
请通过复选标记表示每个注册者是大型迅速申报人、迅速申报人、非迅速申报人、较小的报告公司还是新兴增长公司。请参阅《交易所法》第120亿.2条中对“大型迅速申报人”、“迅速申报人”、“非迅速申报人”、“较小的报告公司”和“新兴增长公司”的定义。
西南燃料币控股有限公司:
大型加速报告人   加速文件申报人 
非加速文件提交人   小型报告公司   
成长型公司    
如果是新兴成长公司,请在复选框中标示,如果注册机构选择不使用根据交换法第13(a)条规定提供的任何新的或修订后的财务会计标准的延长过渡期来遵守,也请在复选框中标示。
西南燃料币公司:
大型加速文件申报人   加速文件申报人 
非加速文件提交人   小型报告公司   
成长型公司    
如果是新兴成长公司,请在复选框中标示,如果注册机构选择不使用根据交换法第13(a)条规定提供的任何新的或修订后的财务会计标准的延长过渡期来遵守,也请在复选框中标示。
请用复选标记表示每个注册者是否属于壳公司(根据《证券交易法》第120亿.2条的定义)。 是    否  
憑勾選符號表明發行人各級普通股的流通股數截至最近可行日期。
西南燃料币控股公司普通股,面值1美元, 71,743,666 截至2024年10月25日的股份。
截至2024年10月25日,燃料币西南燃气公司的所有普通股(面值1美元)均由西南燃气控股公司持有。
SOUTHWEST燃料币公司符合Form 10-Q的一般指示(H)(1)(a)和(b)中规定的条件,并且因此按照一般指示H(2)的规定,以简化的披露格式提交本报告。


西南燃气控股股份有限公司。  10-Q表格
西南燃料币公司  2024年9月30日

报表格式
这份第10-Q表格的季度报告是由两个独立的登记公司——西南燃料币控股公司和西南燃料币公司共同提交的。除非内容明确指示,报告中对“我们”、“我们”或“我们的”等的任何提及指的是控股公司或西南燃料币控股公司及其所有的合并实体,包括西南燃料币公司,后者是西南燃料币控股公司的全资子公司。本文所含与任何单独公司有关的信息均由该公司代表自身提交。每家公司仅对自身进行陈述,不对其他任何公司作出任何陈述。
本季度报告中的基本报表包括西南燃料币控股公司和西南燃料币公司分开的基本报表(即资产负债表、利润表、综合利润表、现金流量表和权益变动表),按照这个顺序排列。简明综合财务报表附注以合并方式呈现给这两个实体。除第I部分—项目1之外的所有项目均结合报告公司。


2

西南燃气控股股份有限公司。  10-Q表格
西南燃料币公司  2024年9月30日

第一部分 - 财务信息
项目1 基本报表
SOUTHWEST燃料币控股公司及其附属公司
简明合并资产负债表
(以千美元为单位,除了票面价值)
(未经审计)
2024年9月30日2023年12月31日
资产
受监管的运营工厂:
燃料币工厂$10,652,224 $10,140,362 
减:累计折旧(2,937,435)(2,822,669)
在建工程243,375 200,549 
净受监管的运营工厂7,958,164 7,518,242 
其他资产和投资净额1,193,062 1,266,340 
流动资产:
现金及现金等价物456,643 106,536 
应收账款净额673,219 886,549 
应计的公共事业收入47,800 93,000 
应收所得税款,净额7,401 1,935 
延期购入燃料币成本9,270 552,885 
预付和其他流动资产261,063 218,832 
持有待售的流动资产 21,377 
总流动资产1,455,396 1,881,114 
非流动资产:
商誉787,595 789,729 
延迟所得税2,833 463 
待摊费用和其他资产477,900 414,008 
非流动资产总额1,268,328 1,204,200 
资产总额$11,874,950 $11,869,896 
资本化和负债
资本化:
普通股,每股面值为 $0.0001;1 授权股 120,000,000股;
已发行并流通股 71,740,33271,563,750股)
$73,370 $73,194 
额外实收资本2,714,958 2,541,790 
合计其他综合损失,净额(43,875)(43,787)
保留盈余710,940 738,839 
归属于西南燃料币控股公司股东的总权益
3,455,393 3,310,036 
非控股权益176,857  
股东权益总计3,632,250 3,310,036 
可赎回的非控制股份7,706 104,667 
开多期限为长期的债务,减去流动负债4,382,146 4,609,838 
总市值8,022,102 8,024,541 
流动负债:
长期债务的到期偿还30,264 42,552 
短期债务663,000 628,500 
应付账款226,960 346,907 
客户存款60,750 48,460 
应付所得税,净额2,019 817 
应计一般税款64,005 58,053 
应计利息44,514 36,605 
延迟购买燃料币成本188,985  
其他流动负债422,245 522,953 
流动负债合计1,702,742 1,684,847 
递延所得税和其他贷项:
递延所得税和投资税收抵免,净额790,825 752,997 
累计清除成本465,000 458,000 
其他递延贷项和其他长期负债894,281 949,511 
递延所得税和其他贷项总额2,150,106 2,160,508 
总资本化和负债$11,874,950 $11,869,896 
The accompanying notes are an integral part of these statements.

3

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

SOUTHWEST GAS HOLDINGS, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
(In thousands, except per share amounts)
(Unaudited)
Three Months Ended
September 30,
Nine Months Ended
September 30,
 2024202320242023
Operating revenues:
Regulated operations revenues$359,131 $394,603 $1,922,157 $1,832,480 
Utility infrastructure services revenues720,053 774,889 1,920,151 2,233,961 
Total operating revenues1,079,184 1,169,492 3,842,308 4,066,441 
Operating expenses:
Net cost of gas sold111,712 170,056 984,188 908,646 
Operations and maintenance131,416 126,851 401,185 404,554 
Depreciation and amortization107,361 105,520 322,575 329,745 
Taxes other than income taxes22,283 21,147 66,414 66,981 
Utility infrastructure services expenses644,928 685,687 1,765,116 2,005,084 
Goodwill impairment and loss on sale   71,230 
Total operating expenses1,017,700 1,109,261 3,539,478 3,786,240 
Operating income61,484 60,231 302,830 280,201 
Other income and (expenses):
Net interest deductions(77,731)(71,998)(223,105)(218,679)
Other income16,758 14,464 49,818 52,528 
Total other income and (expenses)(60,973)(57,534)(173,287)(166,151)
Income before income taxes511 2,697 129,543 114,050 
Income tax expense (benefit)(2,152)(1,270)19,108 32,174 
Net income2,663 3,967 110,435 81,876 
Net income attributable to noncontrolling interests2,374 736 4,076 3,856 
Net income attributable to Southwest Gas Holdings, Inc.$289 $3,231 $106,359 $78,020 
Earnings per share attributable to Southwest Gas Holdings, Inc.:
Basic $ $0.05 $1.48 $1.11 
Diluted $ $0.04 $1.48 $1.10 
Weighted average shares:
Basic 71,880 71,626 71,816 70,488 
Diluted 72,086 71,851 71,994 70,676 
The accompanying notes are an integral part of these statements.


4

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

SOUTHWEST GAS HOLDINGS, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(Thousands of dollars)
(Unaudited)
Three Months Ended
September 30,
Nine Months Ended
September 30,
 2024202320242023
Net income$2,663 $3,967 $110,435 $81,876 
Other comprehensive income, net of tax
Defined benefit pension plans:
Amortization of prior service cost33 33 99 99 
Amortization of net actuarial loss1,452 253 4,355 760 
Regulatory adjustment(1,101)(90)(3,300)(270)
Net defined benefit pension plans384 196 1,154 589 
Foreign currency translation adjustments1,675 (2,261)(2,296)130 
Total other comprehensive income (loss), net of tax2,059 (2,065)(1,142)719 
Comprehensive income4,722 1,902 109,293 82,595 
Comprehensive income attributable to noncontrolling interests2,693 736 4,226 3,856 
Comprehensive income attributable to Southwest Gas Holdings, Inc.$2,029 $1,166 $105,067 $78,739 
The accompanying notes are an integral part of these statements.


5

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

SOUTHWEST GAS HOLDINGS, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(Thousands of dollars)
(Unaudited)
Nine Months Ended
September 30,
 20242023
CASH FLOW FROM OPERATING ACTIVITIES:
Net income$110,435 $81,876 
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization322,575 329,745 
Impairment of assets and other charges 71,230 
Deferred income taxes35,263 45,317 
Gains on sale of property and equipment(2,651)(3,090)
Changes in undistributed stock compensation10,020 8,557 
Equity AFUDC(5,548)(82)
Changes in current assets and liabilities:
Accounts receivable, net of allowances187,099 (40,232)
Accrued utility revenue45,200 43,500 
Deferred purchased gas costs732,600 (252,022)
Accounts payable(99,763)(360,554)
Accrued taxes1,690 12,687 
Other current assets and liabilities(143,233)315,728 
Changes in deferred charges and other assets(16,582)1,243 
Changes in other liabilities and deferred credits(22,769)(55,469)
Net cash provided by operating activities1,154,336 198,434 
CASH FLOW FROM INVESTING ACTIVITIES:
Construction expenditures and property additions(709,813)(664,590)
Proceeds from the sale of business, net of cash sold 1,022,483 
Proceeds from the sale of property21,377  
Changes in customer advances(4,804)(6,974)
Other5,918 6,147 
Net cash provided by (used in) investing activities(687,322)357,066 
CASH FLOW FROM FINANCING ACTIVITIES:
Issuance of common stock, net6,681 249,238 
Redemption of redeemable noncontrolling interest
(92,839)(39,894)
Dividends paid(133,285)(130,232)
Issuance of long-term debt, net280,408 1,043,602 
Retirement of long-term debt(525,511)(168,127)
Change in short-term portion of credit facility34,500 (115,000)
Change in long-term credit facility and commercial paper (50,000)
Issuance of short-term debt 450,000 
Repayment of short-term debt (1,822,747)
Withholding remittance - share-based compensation(2,476)(1,742)
Proceeds from Centuri initial public offering, net
327,967  
Other, including principal payments on finance leases(12,210)(12,642)
Net cash used in financing activities(116,765)(597,544)
Effects of currency translation on cash and cash equivalents(142)102 
Change in cash and cash equivalents350,107 (41,942)
Cash and cash equivalents included in current assets held for sale at beginning of period 23,803 
Cash and cash equivalents at beginning of period106,536 123,078 
Cash and cash equivalents at end of period$456,643 $104,939 
SUPPLEMENTAL INFORMATION:
Interest paid, net of amounts capitalized$204,135 $196,609 
Income taxes paid, net$8,108 $5,957 
The accompanying notes are an integral part of these statements.

6

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

SOUTHWEST GAS HOLDINGS, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF EQUITY
(In thousands, except per share amounts)
(Unaudited)
Three Months Ended
September 30,
Nine Months Ended
September 30,
2024202320242023
Common stock shares
Beginning balances71,709 71,473 71,564 67,119 
Common stock issuances31 42 176 4,396 
Ending balances71,740 71,515 71,740 71,515 
Common stock amount
Beginning balances$73,339 $73,103 $73,194 $68,749 
Common stock issuances31 42 176 4,396 
Ending balances73,370 73,145 73,370 73,145 
Additional paid-in capital
Beginning balances2,709,674 2,534,223 2,541,790 2,287,183 
Common stock issuances5,284 5,536 14,694 252,576 
Centuri IPO— — 154,287 — 
Promissory notes in association with redeemable noncontrolling interest— — 4,187 — 
Ending balances2,714,958 2,539,759 2,714,958 2,539,759 
Accumulated other comprehensive loss
Beginning balances(45,615)(41,458)(43,787)(44,242)
Centuri IPO— — 1,204 — 
Foreign currency exchange translation adjustment1,356 (2,261)(2,446)130 
Net actuarial gain arising during period, less amortization of unamortized benefit plan cost, net of tax384 196 1,154 589 
Ending balances(43,875)(43,523)(43,875)(43,523)
Retained earnings
Beginning balances755,367 696,958 738,839 747,069 
Net income289 3,231 106,359 78,020 
Dividends declared(44,716)(44,584)(134,064)(133,879)
Redemption value adjustments— 13,759 (194)(21,846)
Ending balances710,940 669,364 710,940 669,364 
Total Southwest Gas Holdings, Inc. equity ending balances3,455,393 3,238,745 3,455,393 3,238,745 
Noncontrolling interest
Beginning balances174,199    
Centuri IPO— — 172,501 — 
Net income attributable to noncontrolling interest holders2,339 — 4,206 — 
Foreign currency exchange translation adjustment319 — 150 — 
Ending balances176,857  176,857  
Total equity ending balances$3,632,250 $3,238,745 $3,632,250 $3,238,745 
Dividends declared per common share$0.62 $0.62 $1.86 $1.86 
The accompanying notes are an integral part of these statements.

7

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATED BALANCE SHEETS
(Thousands of dollars)
(Unaudited)
September 30, 2024December 31, 2023
ASSETS
Regulated operations plant:
Gas plant$10,652,224 $10,140,362 
Less: accumulated depreciation(2,937,435)(2,822,669)
Construction work in progress243,375 200,549 
Net regulated operations plant7,958,164 7,518,242 
Other property and investments, net159,174 152,658 
Current assets:
Cash and cash equivalents401,653 71,154 
Accounts receivable, net of allowance131,560 269,195 
Accrued utility revenue47,800 93,000 
Income taxes receivable, net43 26 
Deferred purchased gas costs9,270 552,885 
Prepaid and other current assets222,148 188,138 
Current assets held for sale 21,376 
Total current assets812,474 1,195,774 
Noncurrent assets:
Goodwill11,155 11,155 
Deferred charges and other assets400,762 390,742 
Total noncurrent assets411,917 401,897 
Total assets$9,341,729 $9,268,571 
CAPITALIZATION AND LIABILITIES
Capitalization:
Common stock$49,112 $49,112 
Additional paid-in capital2,162,196 2,156,577 
Accumulated other comprehensive loss, net(39,394)(40,548)
Retained earnings1,043,648 1,018,474 
Total equity3,215,562 3,183,615 
Long-term debt, less current maturities3,503,629 3,501,543 
Total capitalization6,719,191 6,685,158 
Current liabilities:
Accounts payable95,036 215,744 
Customer deposits60,750 48,460 
Accrued general taxes64,005 58,053 
Accrued interest38,363 34,955 
Deferred purchased gas costs188,985  
Payable to parent415 1,711 
Other current liabilities204,254 271,899 
Total current liabilities651,808 630,822 
Deferred income taxes and other credits:
Deferred income taxes and investment tax credits, net797,262 749,836 
Accumulated removal costs465,000 458,000 
Other deferred credits and other long-term liabilities708,468 744,755 
Total deferred income taxes and other credits1,970,730 1,952,591 
Total capitalization and liabilities$9,341,729 $9,268,571 
The accompanying notes are an integral part of these statements.

8

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
(Thousands of dollars)
(Unaudited)
Three Months Ended
September 30,
Nine Months Ended
September 30,
 2024202320242023
Regulated operations revenues$359,131 $394,603 $1,922,157 $1,797,348 
Operating expenses:
Net cost of gas sold111,712 170,056 984,188 902,278 
Operations and maintenance129,736 122,270 390,229 378,189 
Depreciation and amortization74,153 69,268 220,663 218,763 
Taxes other than income taxes22,283 21,147 66,414 65,491 
Total operating expenses337,884 382,741 1,661,494 1,564,721 
Operating income21,247 11,862 260,663 232,627 
Other income and (expenses):
Net interest deductions(42,312)(35,772)(118,595)(111,498)
Other income16,665 14,537 48,976 51,722 
Total other (expenses)(25,647)(21,235)(69,619)(59,776)
Income (loss) before income taxes(4,400)(9,373)191,044 172,851 
Income tax expense (benefit)(4,972)(6,122)27,053 22,286 
Net income (loss)$572 $(3,251)$163,991 $150,565 
The accompanying notes are an integral part of these statements.


9

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(Thousands of dollars)
(Unaudited)
Three Months Ended
September 30,
Nine Months Ended
September 30,
 2024202320242023
Net income (loss)$572 $(3,251)$163,991 $150,565 
Other comprehensive income, net of tax
Defined benefit pension plans:
Amortization of prior service cost33 33 99 99 
Amortization of net actuarial loss1,452 253 4,355 760 
Regulatory adjustment(1,101)(90)(3,300)(270)
Net defined benefit pension plans384 196 1,154 589 
Total other comprehensive income, net of tax384 196 1,154 589 
Comprehensive income (loss)$956 $(3,055)$165,145 $151,154 

The accompanying notes are an integral part of these statements.


10

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(Thousands of dollars)
(Unaudited)
Nine Months Ended
September 30,
 20242023
CASH FLOW FROM OPERATING ACTIVITIES:
Net income$163,991 $150,565 
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization220,663 218,763 
Deferred income taxes47,061 43,348 
Gain on sale of property (136)
Changes in undistributed stock compensation6,901 5,395 
Equity AFUDC(5,548) 
Changes in current assets and liabilities:
Accounts receivable, net of allowance137,635 66,275 
Accrued utility revenue45,200 43,500 
Deferred purchased gas costs732,599 (237,017)
Accounts payable(103,708)(346,579)
Accrued taxes5,935 8,782 
Other current assets and liabilities(92,639)291,863 
Changes in deferred charges and other assets (39,098)(21,750)
Changes in other liabilities and deferred credits(24,537)(54,894)
Net cash provided by operating activities1,094,455 168,115 
CASH FLOW FROM INVESTING ACTIVITIES:
Construction expenditures and property additions(643,720)(581,190)
Proceeds from the sale of property21,377  
Changes in customer advances(4,804)(6,974)
Other244 670 
Net cash used in investing activities(626,903)(587,494)
CASH FLOW FROM FINANCING ACTIVITIES:
Contribution from parent 530,000 
Dividends paid(133,500)(111,200)
Issuance of long-term debt, net 297,759 
Change in long-term credit facility and commercial paper (50,000)
Issuance of short-term debt 450,000 
Repayment of short-term debt (675,000)
Withholding remittance - share-based compensation(1,801)(1,528)
Other(1,752)(1,505)
Net cash provided by (used in) financing activities(137,053)438,526 
Change in cash and cash equivalents330,499 19,147 
Cash and cash equivalents at beginning of period71,154 51,823 
Cash and cash equivalents at end of period$401,653 $70,970 
SUPPLEMENTAL INFORMATION:
Interest paid, net of amounts capitalized$111,610 $99,425 
Income taxes paid, net$ $ 
The accompanying notes are an integral part of these statements.


11

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

SOUTHWEST GAS CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF EQUITY
(In thousands)
(Unaudited)
Three Months Ended
September 30,
Nine Months Ended
September 30,
2024202320242023
Common stock shares
Beginning and ending balances47,482 47,482 47,482 47,482 
Common stock amount
Beginning and ending balances$49,112 $49,112 $49,112 $49,112 
Additional paid-in capital
Beginning balances2,160,535 2,156,026 2,156,577 1,622,969 
Share-based compensation1,661 1,248 5,619 4,305 
Contributions from Southwest Gas Holdings, Inc.— — — 530,000 
Ending balances2,162,196 2,157,274 2,162,196 2,157,274 
Accumulated other comprehensive loss
Beginning balances(39,778)(37,868)(40,548)(38,261)
Net actuarial gain arising during period, less amortization of unamortized benefit plan cost, net of tax384 196 1,154 589 
Ending balances(39,394)(37,672)(39,394)(37,672)
Retained earnings
Beginning balances1,087,666 1,009,608 1,018,474 935,355 
Net income (loss)
572 (3,251)163,991 150,565 
Share-based compensation (90)(75)(517)(438)
Dividends declared to Southwest Gas Holdings, Inc.(44,500)(39,700)(138,300)(118,900)
Ending balances1,043,648 966,582 1,043,648 966,582 
Total Southwest Gas Corporation equity ending balances$3,215,562 $3,135,296 $3,215,562 $3,135,296 
The accompanying notes are an integral part of these statements.


12

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

Note 1 – Background, Organization, and Summary of Significant Accounting Policies
Nature of Operations. Southwest Gas Holdings, Inc. (together with its subsidiaries, the “Company”) is a holding company, owning all of the shares of common stock of Southwest Gas Corporation (“Southwest” or the “natural gas distribution” segment), until April 22, 2024, all of the shares of common stock of Centuri Group, Inc. (“utility infrastructure services” segment), and until February 14, 2023, all of the shares of common stock of MountainWest Pipelines Holding Company (“MountainWest” or the “pipeline and storage” segment). References throughout this document to “Centuri” relate to Centuri Group, Inc., for periods prior to April 22, 2024, or subsequently, to Centuri Holdings, Inc.
In December 2022, the Company announced that its Board of Directors (the “Board”) unanimously determined to take strategic actions to simplify the Company’s portfolio of businesses. These actions included entering into a definitive agreement to sell 100% of MountainWest to Williams Partners Operating LLC for $1.5 billion in total enterprise value, subject to certain adjustments. The sale closed on February 14, 2023.
Also as part of this simplification strategy, the Company previously communicated that it would pursue a separation of Centuri. In April 2024, the Company and Centuri Holdings, Inc. announced the completion of an initial public offering of Centuri Holdings, Inc. common stock (the “Centuri IPO”). Following the Centuri IPO, the Company owns approximately 81% of Centuri. Through the first quarter of 2024 and leading up to the Centuri IPO, Centuri continued to be wholly owned by Southwest Gas Holdings, Inc. Centuri continues to be consolidated as part of these financial statements, and will continue to be consolidated until such time as the conditions for consolidation are no longer met. Centuri now makes separate filings with the Securities and Exchange Commission (the “SEC”) as a public company. The Company’s common stock continues to trade under the ticker symbol “SWX,” while Centuri’s common stock trades under the ticker symbol “CTRI.” See Note 8 - Centuri Separation.
On October 15, 2024, the Company and Carl C. Icahn and the persons and entities listed therein (collectively, the “Icahn Group”) entered into an Amended and Restated Cooperation Agreement (the “Amended Agreement”), which amends, restates, supersedes, and replaces in its entirety the Amended and Restated Cooperation Agreement entered into on November 21, 2023. In accordance with the terms of the Amended Agreement, the Company agreed with the Icahn Group, among other things, to nominate Andrew W. Evans, Henry P. Linginfelter, Ruby Sharma, and Andrew J. Teno (collectively, the “Icahn Designees”) for election at the Company’s 2025 Annual Meeting of Stockholders (the “2025 Annual Meeting”). In addition, the Amended Agreement provides that the standstill restrictions on the Icahn Group will remain in effect until, and the Amended Agreement will terminate upon, the later of (x) the conclusion of the 2025 Annual Meeting and (y) the earlier of (1) immediately following the time at which Mr. Teno (or any replacement designee for Mr. Teno) is no longer serving on the Company’s Board and (2) thirty days prior to the expiration of the advance notice deadline for submission of director nominees in connection with the Company’s 2026 Annual Meeting of Stockholders; provided, however, that the Amended Agreement will terminate automatically on the date on which the Board re-appoints as a director any former director of the Board, without the approval of a majority of the Icahn Designees. The Company further agreed with the Icahn Group to establish the record date for the 2025 Annual Meeting for a time within thirty days of March 4, 2025. Other than the foregoing, the material terms of the prior agreement remain unchanged.
Southwest is engaged in the business of purchasing, distributing, and transporting natural gas for customers in portions of Arizona, Nevada, and California. Public utility rates, practices, facilities, and service territories of Southwest are subject to regulatory oversight. The timing and amount of rate relief can materially impact results of operations. Natural gas purchases and the timing of related recoveries can materially impact liquidity, highlighted by the continuation of a significant cash balance existing as of the end of the third quarter of 2024, reflective of the collection of gas costs under purchased gas cost mechanisms as a component of customer bills. While mechanisms exist in all states in which Southwest operates, which effectively and primarily decouple authorized operating cost recovery and profitability from the volume of natural gas sold, thereby also incentivizing energy conservation, results for the natural gas distribution segment are higher during winter periods due to the seasonality incorporated in its regulatory rate structures.
Centuri is a strategic utility infrastructure services company dedicated to partnering with North America’s gas and electric providers to build and maintain the energy network that powers millions of homes across the United States (“U.S.”) and Canada. Centuri derives revenue primarily from installation, replacement, repair, and maintenance of energy networks. Centuri operates in the U.S., primarily as NPL, Neuco, Linetec, and Riggs Distler, and in Canada, primarily as NPL Canada. Utility infrastructure services activity is seasonal in many of Centuri’s operating areas. Peak periods are the summer and fall months in colder climate areas, such as the northeastern and midwestern U.S. and in Canada. In warmer climate areas, such as the southwestern and southeastern U.S., utility infrastructure services activity continues year round.
Basis of Presentation. The condensed consolidated financial statements of Southwest Gas Holdings, Inc. and its subsidiaries, and of Southwest Gas Corporation (with its subsidiaries) included herein have been prepared pursuant to the rules and

13

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

regulations of the SEC. The year-end 2023 condensed balance sheet data was derived from audited financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) have been condensed or omitted pursuant to such rules and regulations.
The preparation of the condensed consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities, as of the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In the opinion of management, all adjustments, consisting of normal recurring items and estimates necessary for a fair statement of results for the interim periods, have been made.
Centuri and the Company do not always have the same basis of presentation, which could result in differences between the amounts presented in the Company’s financial information related to Centuri, and amounts included in Centuri’s separate publicly filed financial information.
During the three months ended September 30, 2024, Centuri entered into an agreement for the securitization of accounts receivable, which includes the consolidation of a newly formed special purpose entity, and the derecognition of accounts receivable that are sold, due to the lack of continuing involvement following their sale to a third party. Refer to Note 3 – Revenue for further details.
These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto of Southwest and the Company included in our 2023 Annual Report on Form 10-K for the fiscal year ended December 31, 2023.
In the first quarter of 2023, management identified a misstatement related to its accounting for the cost of gas sold at Southwest, thereby determining that Net cost of gas sold was overstated in 2021 and 2022 by $2.3 million and $5.7 million, respectively. Southwest made an adjustment in the first quarter of 2023 to reduce Net cost of gas sold and to increase its asset balance for Deferred purchased gas costs by $8 million.
Also in the first quarter of 2023, the Company identified an approximately $21 million misstatement related to its initial estimation of the loss recorded upon reclassifying MountainWest as an asset held for sale during the year ended December 31, 2022. Consequently, the impairment loss for the year ended December 31, 2022 was understated by approximately $21 million, which was corrected in the first quarter of 2023.
The Company (and Southwest, with respect to Net cost of gas sold) assessed, both quantitatively and qualitatively, the impact of these items on previously issued financial statements, concluding they were not material to any earlier period or to the period of correction.
Other Property and Investments. Other property and investments on Southwest’s and the Company’s Condensed Consolidated Balance Sheets includes:
(Thousands of dollars)September 30, 2024December 31, 2023
Net cash surrender value of COLI policies$154,673 $146,546 
Other property4,501 6,112 
Total Southwest Gas Corporation159,174 152,658 
Non-regulated property, equipment, and intangibles1,718,709 1,752,094 
Non-regulated accumulated provision for depreciation and amortization(725,942)(675,632)
Other property and investments41,121 37,220 
Total Southwest Gas Holdings, Inc.$1,193,062 $1,266,340 
Held for sale. In the first quarter of 2023, the Company and Southwest concluded certain assets associated with their previous corporate headquarters met the criteria to be classified as held for sale. As a result, the Company and Southwest reclassified approximately $27 million from Other property and investments to Current assets held for sale on their respective Condensed Consolidated Balance Sheets in the first quarter of 2023. Also in 2023, the Company and Southwest recorded an estimated loss of $5.2 million on the assets based upon an updated fair value less costs to sell. The sale was completed in January 2024.
Cash and Cash Equivalents.  Cash and cash equivalents of the Company include $173.4 million and $48.9 million of money market fund investments at September 30, 2024 and December 31, 2023, respectively. Of these amounts, $141.7 million and $38.6 million at September 30, 2024 and December 31, 2023, respectively, were held by Southwest.
Noncash investing activities include capital expenditures that were not yet paid, thereby remaining in accounts payable, amounts related to which declined by approximately $28.1 million and $17 million for the Company and Southwest,

14

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

respectively, during the nine months ended September 30, 2024; and declined approximately $39.6 million and $35.2 million during the nine months ended September 30, 2023, for the Company and Southwest, respectively.
The Company and Southwest expanded their presentation in the first quarter 2024 to show the Change in short-term portion of credit facility and Repayment of short-term debt as separate line items within their Condensed Consolidated Statements of Cash Flows. The comparable prior-year period has been updated to reflect this change.
Prepaid and other current assets. Prepaid and other current assets for the Company and Southwest include, among other things, materials and operating supplies of $77.5 million at September 30, 2024 and $83.4 million at December 31, 2023 (carried at weighted average cost).
Goodwill. Goodwill is assessed as of October 1 each year for impairment, or more frequently, if circumstances indicate an impairment to the carrying value of goodwill may have occurred. The Company’s reporting units for goodwill are its operating segments, which are also its reportable segments. Since December 31, 2023, management qualitatively assessed whether events during the first nine months of 2024 indicated it was more likely than not that the fair value of our reporting units was less than their carrying value, which if the case, could be an indication of a goodwill impairment. Through management’s assessments, no impairment was deemed to have occurred in the continuing segments of the Company. Goodwill in the Natural Gas Distribution and Utility Infrastructure Services segments is included in the respective Condensed Consolidated Balance Sheets as follows:
(Thousands of dollars)Natural Gas
Distribution
Utility Infrastructure
Services
Total Company
December 31, 2023$11,155 $778,574 $789,729 
Foreign currency translation adjustment (2,134)(2,134)
September 30, 2024$11,155 $776,440 $787,595 
Other Current Liabilities. Management recognizes in its balance sheets various liabilities that are expected to be settled through future cash payment within the next twelve months, including amounts payable under regulatory mechanisms, customary accrued expenses for employee compensation and benefits, declared but unpaid dividends, and miscellaneous other accrued liabilities. Other current liabilities for the Company include $44.5 million and $44.4 million of dividends declared as of September 30, 2024 and December 31, 2023, respectively. Also included in the balance for the Company and Southwest was $33.5 million and $87.6 million in accrued purchased gas costs as of September 30, 2024 and December 31, 2023, respectively.
Other Income (Deductions). The following table provides the composition of significant items included in Other income (deductions) in Southwest’s and the Company’s Condensed Consolidated Statements of Income:
Three Months Ended September 30,Nine Months Ended
September 30,
(Thousands of dollars)
2024202320242023
Southwest Gas Corporation:
Change in COLI policies$3,200 $(1,500)$7,800 $4,800 
Interest income8,736 13,249 27,649 40,235 
Equity AFUDC1,874  5,548  
Other components of net periodic benefit cost4,131 5,097 12,392 15,290 
Miscellaneous expense(1,276)(2,309)(4,413)(8,603)
Southwest Gas Corporation - total other income (deductions)16,665 14,537 48,976 51,722 
Centuri, MountainWest, and Southwest Gas Holdings, Inc.:
Foreign transaction gain (loss)(5)18 (6)(399)
Equity AFUDC   82 
Equity in earnings (loss) of unconsolidated investments127 142 (30)591 
Miscellaneous income and (expense)37 (50)935 466 
Corporate and administrative(66)(183)(57)66 
Southwest Gas Holdings, Inc. - total other income (deductions)$16,758 $14,464 $49,818 $52,528 
Interest income primarily relates to Southwest’s regulatory asset balances, including its deferred purchased gas cost mechanisms, the combined balance of which ranged from an asset balance of $687 million as of September 30, 2023 to a net

15

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

liability balance of $180 million as of September 30, 2024. Interest income is earned on asset balances and interest expense is incurred on liability balances. Refer also to Note 2 – Components of Net Periodic Benefit Cost for details regarding Other components of net periodic benefit cost.
Noncontrolling Interest. In connection with the Centuri IPO, the Company recorded a noncontrolling interest as part of equity in the Condensed Consolidated Balance Sheet (associated with the interests held by the new investors in Centuri), and recognized the excess of the fair value of the Centuri IPO proceeds over the carrying value of the noncontrolling interest, in addition to a portion of Accumulated other comprehensive loss relevant to the proportional interest of the noncontrolling parties in Centuri, within Additional paid-in capital. The Condensed Consolidated Statements of Income include multiple components of comprehensive income attributable to noncontrolling interests following the Centuri IPO. These amounts, including those distinguishable from net income attributed to these parties, are separately presented in the Condensed Consolidated Statements of Equity. Refer also to Note 8 - Centuri Separation.
Redeemable Noncontrolling Interests. Separate from the noncontrolling ownership interests in Centuri, in connection with the earlier acquisition of Linetec, by Centuri, in November 2018, the previous Linetec owner initially retained a 20% equity interest in that entity, with redemption of that interest being subject to certain rights based on the passage of time or upon the occurrence of certain triggering events. Effective in 2022, the Company, through Centuri, had the right, but not the obligation, to purchase at fair value (subject to a floor) a portion of the interest held by the previous Linetec owner, and in incremental amounts each year thereafter. In March 2022, the parties agreed to a partial redemption, reducing the noncontrolling interest to 15%, and in March 2023, agreed to a partial 5% redemption (of the 15% then remaining). In April 2023, Centuri paid $39.9 million to the previous Linetec owner, thereby reducing the balance continuing to be redeemable at that time to 10% under the terms of the original agreement. In March 2024, the parties entered into an agreement to redeem the remaining 10% equity interest for $92 million, which resulted in Centuri owning all of the equity interest in Linetec as of March 31, 2024. Centuri paid the total amount payable under the terms of the redemption agreement in April 2024.
Separately, certain members of Riggs Distler management hold a 1.41% interest in Drum Parent, Inc. (“Drum”), the parent of Riggs Distler, which is redeemable, subject to certain rights based on the passage of time or upon the occurrence of certain triggering events. A portion of the redeemable noncontrolling interest was funded through promissory notes made to noncontrolling interest holders bearing interest at the prime rate plus 2%.
During the first quarter of 2024, Centuri forgave all outstanding promissory notes and unpaid interest owed from the Riggs Distler noncontrolling interest holders and in exchange, obtained a 0.47% portion of the equity interest in Drum that had been funded through these notes. This comprises most of the change noted below as redemption of Drum interests during the first nine months of 2024. Additionally, during the first quarter of 2024, Centuri reached an agreement to purchase 0.13% of the noncontrolling interest in Drum for $0.8 million, the majority of which was accrued in March 2024 and ultimately paid in April 2024. The remaining noncontrolling interest in Drum outstanding as of September 30, 2024 was 0.81%, with Centuri owning over 99% of Drum following these events.
Significant changes in the value of the redeemable noncontrolling interests, above a floor determined at the establishment date, are recognized as they occur, and the carrying value is adjusted as necessary at each reporting date. The fair value is estimated using a market approach that utilizes certain financial metrics from guideline public companies of similar industry and operating characteristics. Valuation adjustments also impact retained earnings, as reflected in the Company’s Condensed Consolidated Statement of Equity, but do not impact net income. The following depicts changes to the balances of the redeemable noncontrolling interests:
(Thousands of dollars)
LinetecDrumTotal
Balance, December 31, 2023
$91,978 $12,689 $104,667 
Net income (loss) attributable to redeemable noncontrolling interests
(193)63 (130)
 Redemption value adjustments194  194 
 Redemption of redeemable noncontrolling interest
(91,979)(5,046)(97,025)
Balance, September 30, 2024
$ $7,706 $7,706 
Earnings Per Share. Basic earnings per share (“EPS”) in each period of this report were calculated by dividing net income attributable to Southwest Gas Holdings, Inc. by the weighted-average number of shares during those periods. Diluted EPS includes additional weighted-average common stock equivalents (performance share units and restricted stock units). Unless

16

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

otherwise noted, the term “Earnings Per Share” refers to Basic EPS. A reconciliation of the denominator used in Basic and Diluted EPS calculations is shown in the following table:
Three Months Ended September 30,Nine Months Ended
September 30,
(In thousands)2024202320242023
Weighted average basic shares71,880 71,626 71,816 70,488 
Effect of dilutive securities:
Restricted stock units (1)206 225 178 188 
Weighted average diluted shares72,086 71,851 71,994 70,676 
(1) The number of securities included 165,000 and 189,000 performance share units during the three months ended September 30, 2024 and September 30, 2023, the total of which was derived by assuming that target performance will be achieved during the relevant performance period. During the nine months ended September 30, 2024 and September 30, 2023, respectively, the number of securities included 148,000 and 160,000 performance share units, the total of which was derived by assuming that target performance will be achieved during the relevant performance period.
Income Taxes. The Company’s effective tax rate was (421.1)% for the three months ended September 30, 2024, compared to (47.1)% for the corresponding period in 2023, primarily due to pre-tax income differences, the amortization of excess deferred income taxes, and corporate-owned life insurance (“COLI”). The Company’s effective tax was 14.8% for the nine months ended September 30, 2024, compared to 28.2% for the corresponding period in 2023, primarily due to amortization of excess deferred income taxes, nondeductible costs associated with the Centuri IPO, and the MountainWest sale in 2023, which included the impact of book versus tax basis differences related to that transaction. The tax impacts of further separation of Centuri will depend on the ultimate separation path (See Note 8 - Centuri Separation).
Southwest’s effective tax rate was 113.0% for the three months ended September 30, 2024, compared to 65.3% for the corresponding period in 2023 primarily due to pre-tax income differences, the amortization of excess deferred income taxes, and the impacts of COLI. Southwest’s effective tax rate was 14.2% for the nine months ended September 30, 2024, compared to 12.9% in the corresponding period in 2023 primarily due to the amortization of excess accumulated deferred income taxes and COLI.
In April 2023, the Internal Revenue Service issued Revenue Procedure 2023-15, which provides a safe harbor method of accounting that taxpayers may use to determine whether expenditures to repair, maintain, replace, or improve natural gas transmission and distribution property must be capitalized for tax purposes. The Company intends to adopt this change in tax accounting method with its 2024 U.S. federal income tax return filing in 2025, and it expects the safe harbor method to increase tax repair deductions. The effects of the change in method are not expected to be material to the financial statements overall, as this change will result in an increase in a deferred tax liability offset by a net operating loss position deferred tax asset.
Recent Accounting Standards Updates.
Recently issued accounting pronouncement that will be effective in 2024 and later periods:
In November 2023, the Financial Accounting Standards Board (the “FASB”) issued ASU 2023-07 “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” The update, among other amendments, requires disclosure of significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of segment profit or loss, as well as an amount and description of the composition of other segment items to reconcile to segment profit or loss. The update also requires the title and position of the entity’s CODM to be disclosed, and extends certain annual disclosures to interim periods. The provisions of the update are effective for fiscal years beginning after December 15, 2023 and interim periods within the fiscal years beginning after December 15, 2024. Early adoption is permitted. The Company and Southwest expect that the adoption of this guidance will only impact disclosures, with no impact on results of operations, cash flows, or financial condition.
Recently issued accounting pronouncement that will be effective after 2024:
In December 2023, the FASB issued ASU 2023-09 “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The update, among other amendments, provides for enhanced income tax information primarily through changes in the rate reconciliation and income taxes paid. The update is effective for annual periods beginning after December 15, 2024; early adoption is permitted. The Company and Southwest expect that the adoption of this guidance will only impact disclosures, with no impact on results of operations, cash flows, or financial condition.

17

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

Note 2 – Components of Net Periodic Benefit Cost
The components of Southwest's net periodic benefit cost for its pension plan, supplemental retirement plan ("SERP"), and postretirement benefits other than pensions ("PBOP") for the three and nine months ended September 30, 2024 and 2023 are presented in the following tables.
 Qualified Retirement Plan
 September 30,
 Three MonthsNine Months
 2024202320242023
(Thousands of dollars)    
Service cost$7,063 $6,460 $21,189 $19,380 
Interest cost15,097 14,791 45,291 44,373 
Expected return on plan assets(21,953)(21,015)(65,859)(63,045)
Amortization of net actuarial loss1,577 84 4,731 252 
Net periodic benefit cost$1,784 $320 $5,352 $960 
 SERP
 September 30,
 Three MonthsNine Months
 2024202320242023
(Thousands of dollars)    
Service cost$61 $62 $183 $186 
Interest cost542 531 1,626 1,593 
Amortization of net actuarial loss333 249 999 748 
Net periodic benefit cost$936 $842 $2,808 $2,527 
 PBOP
 September 30,
 Three MonthsNine Months
 2024202320242023
(Thousands of dollars)    
Service cost$322 $317 $966 $951 
Interest cost794 825 2,383 2,475 
Expected return on plan assets(565)(606)(1,695)(1,818)
Amortization of prior service costs44 44 132 132 
Net periodic benefit cost$595 $580 $1,786 $1,740 

18

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

Note 3 – Revenue
The following information about the Company’s revenues is presented by segment. Southwest encompasses the natural gas distribution segment and Centuri encompasses the utility infrastructure services segment.
Natural Gas Distribution Segment:
Southwest’s operating revenues included on the Condensed Consolidated Statements of Income of both the Company and Southwest include revenue from contracts with customers, which is shown below, disaggregated by customer type, in addition to other categories of revenue:
 Three Months Ended
September 30,
Nine Months Ended
September 30,
(Thousands of dollars)2024202320242023
Residential$189,156 $215,376 $1,283,945 $1,277,363 
Small commercial70,708 85,955 387,793 366,667 
Large commercial20,569 27,888 87,895 84,021 
Industrial/other13,443 16,596 49,737 52,165 
Transportation27,515 23,278 82,875 77,558 
Revenue from contracts with customers321,391 369,093 1,892,245 1,857,774 
Alternative revenue program revenues (deferrals)34,341 21,840 17,978 (72,251)
Other revenues (1)3,399 3,670 11,934 11,825 
Total Regulated operations revenues$359,131 $394,603 $1,922,157 $1,797,348 
(1) Amounts include late fees and other miscellaneous revenues, and may also include the impact of certain regulatory mechanisms.
Utility Infrastructure Services Segment:
During the fourth quarter of 2023, utility infrastructure services segment management, in connection with Centuri’s planned separation, changed its service type revenue classification to align with changes in its organizational structure, and as a result, prior year “other” revenue has been recast into gas infrastructure services or electric power infrastructure services to reflect these changes, with no impact to revenue overall. The following tables display Centuri’s revenue, reflected as Utility infrastructure services revenues on the Condensed Consolidated Statements of Income of the Company, representing revenue from contracts with customers, disaggregated by service and contract types:
 Three Months Ended
September 30,
Nine Months Ended
September 30,
(Thousands of dollars)20242023*20242023*
Service Types:
Gas infrastructure services$416,424 $450,335 $1,059,326 $1,188,941 
Electric power infrastructure services300,510 314,850 845,699 1,008,911 
Other3,119 9,704 15,126 36,109 
Total Utility infrastructure services revenues$720,053 $774,889 $1,920,151 $2,233,961 
*The three months ended September 30, 2023 were previously presented as: Gas infrastructure services of $443,083, Electric power infrastructure services of $200,547, and Other of $131,259. The nine months ended September 30, 2023 were previously presented as: Gas infrastructure services of $1,173,960, Electric power infrastructure services of $668,681, and Other of $391,320.

19

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

 Three Months Ended
September 30,
Nine Months Ended
September 30,
(Thousands of dollars)2024202320242023
Contract Types:
Master services agreement$569,000 $631,913 $1,571,701 $1,830,242 
Bid contract151,053 142,976 348,450 403,719 
Total Utility infrastructure services revenues$720,053 $774,889 $1,920,151 $2,233,961 
Unit price contracts$412,871 $440,787 $1,119,161 $1,191,889 
Fixed price contracts138,242 165,637 383,090 521,722 
Time and materials contracts168,940 168,465 417,900 520,350 
Total Utility infrastructure services revenues$720,053 $774,889 $1,920,151 $2,233,961 
The following table provides information about contracts receivable and revenue earned on contracts in progress in excess of billings (contract assets), both of which are included within Accounts receivable, net of allowances, as well as amounts billed in excess of revenue earned on contracts (contract liabilities) at Centuri, which are included in Other current liabilities as of September 30, 2024 and December 31, 2023 on the Company’s Condensed Consolidated Balance Sheets:
(Thousands of dollars)September 30, 2024December 31, 2023
Contracts receivable, net$253,019 $347,454 
Revenue earned on contracts in progress in excess of billings288,568 269,808 
Amounts billed in excess of revenue earned on contracts21,894 43,694 
Revenue earned on contracts in progress in excess of billings (contract assets) that are not expected to be invoiced and collected within a year from the financial statement date are not included in the table above, and were $24.1 million as of September 30, 2024, and $0.2 million as of December 31, 2023. These non-current balances were included in Deferred charges and other assets on the Company’s Condensed Consolidated Balance Sheets.
These contract assets primarily relate to Centuri’s rights to consideration for work completed, but not billed and/or approved for billing at the reporting date, and are transferred to contracts receivable when the rights become unconditional. The amounts billed in excess of revenue earned primarily relate to the advance consideration received from customers for which work has not yet been completed. The decrease in the contract liability balance from December 31, 2023 to September 30, 2024 of $21.8 million was due to revenue recognized during the period, net of new payments received in advance of work performed.
For contracts that have an original duration of one year or less, Centuri uses the practical expedient applicable to such contracts and does not consider/compute an interest component based on the time value of money. Furthermore, because of the short duration of these contracts, Centuri has not disclosed the transaction price for the remaining performance obligations as of the end of each reporting period or when the Company expects to recognize the revenue.
As of September 30, 2024, Centuri had 42 fixed price contracts with an original duration of more than one year. The aggregate amount of the transaction price allocated to the unsatisfied performance obligations of these contracts as of September 30, 2024 was $249.1 million. Centuri expects to recognize the remaining performance obligations over approximately the next two years; however, the timing of that recognition is largely within the control of the customer, including when the necessary materials required to complete the work are provided by the customer.
Utility infrastructure services contracts receivable consists of the following:
(Thousands of dollars)September 30, 2024December 31, 2023
Billed on completed contracts and contracts in progress$253,809 $348,021 
Other receivables2,115 1,945 
Contracts receivable, gross255,924 349,966 
Allowance for doubtful accounts(2,905)(2,512)
Contracts receivable, net$253,019 $347,454 
In September 2024, Centuri Group, Inc. and certain other subsidiaries of Centuri Holdings, Inc. entered into a three-year Accounts Receivable Securitization Facility (“the Facility”) for an aggregate amount of up to $125 million with PNC Bank, National Association (“PNC”), to enhance Centuri’s financial flexibility by providing additional liquidity.

20

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

Under the Facility, certain designated subsidiaries of Centuri have sold and/or contributed, and will continue to sell and/or contribute, their trade accounts receivable and contract assets generated in the ordinary course of business to an indirect wholly owned bankruptcy-remote Special Purpose Entity (“SPE”) of Centuri created specifically for this purpose. The SPE is a variable interest entity, and Centuri is the primary beneficiary and therefore consolidates the SPE. The SPE transfers ownership and control of accounts receivable (but not contract assets) to PNC for payments as set forth in the receivables purchase agreement. Centuri and its related subsidiaries have no continuing involvement in the transferred accounts receivable, other than collection and administrative responsibilities, and, once sold, the accounts receivable are no longer available to satisfy Centuri’s creditors or those of its related subsidiaries. Centuri has not recorded any servicing asset or liability related to this continuing involvement as Centuri has determined it is compensated adequately for its servicing role. Centuri accounts for accounts receivable sold to PNC as a sale of financial assets and has derecognized the accounts receivable from its consolidated balance sheet for the current period.
In addition, Centuri has agreed to guarantee the performance of the indirect wholly-owned subsidiaries and Centuri Group, Inc. as the servicer, of their respective obligations under the documentation for the Facility. Centuri is not guaranteeing the collectibility of the receivables or the creditworthiness of the related obligors. The Facility is subject to yield charges based upon a rate as specified in the receivables purchase agreement. Centuri may incur a recourse obligation in limited circumstances, but has determined this liability is not material.
The total outstanding balance of accounts receivable that have been sold and derecognized is $125 million as of September 30, 2024. Additionally, the SPE owned unsold accounts receivable and contract assets of $60.6 million and $115.5 million, respectively, as of September 30, 2024, which are pledged as collateral to PNC. These balances are primarily included in Accounts receivable, net of allowances in the Company’s Condensed Consolidated Balance Sheet, with certain non-current balances included in Deferred charges and other assets. For the nine months ended September 30, 2024, Centuri received $125 million in cash proceeds from the Facility, which are included in cash from operating activities in the Condensed Consolidated Statement of Cash Flows and had no repayments to the Facility. As of September 30, 2024, Centuri had no available capacity under the Facility.
Note 4 – Common Stock
Shares of the Company’s common stock are publicly traded on the New York Stock Exchange, under the ticker symbol “SWX.” Share-based compensation related to Southwest and Centuri is based on stock awards to be issued in shares of Southwest Gas Holdings, Inc.
On August 6, 2024, the Company entered into an Equity Distribution Agreement with J.P. Morgan Securities LLC and Wells Fargo Securities, LLC for the offer and sale of up to $340,000,000 of common stock from time to time in an “at-the-market” offering program (the “ATM Program”). The offering amount was carried forward from the Company’s previous at-the-market equity offering program. The shares are issuable pursuant to the Company’s automatic shelf registration statement on Form S-3 (File No. 333-275774). No issuances have occurred under the ATM Program as of September 30, 2024.
During the nine months ended September 30, 2024, the Company issued approximately 78,000 shares of common stock through the Omnibus Incentive Plan.
Additionally, during the nine months ended September 30, 2024, the Company issued 98,000 shares of common stock through the Dividend Reinvestment and Direct Stock Purchase Plan, raising approximately $6.9 million.


21

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

Note 5 – Debt
Long-Term Debt
Long-term debt is recognized in the Company’s and Southwest’s Condensed Consolidated Balance Sheets generally at the carrying value of the obligations outstanding. Details surrounding the fair value and individual carrying values of instruments are provided in the table that follows.
 September 30, 2024December 31, 2023
Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
(Thousands of dollars)
Southwest Gas Corporation:
Debentures:
8% Series, due 2026
$75,000 $78,648 $75,000 $79,502 
Medium-term notes, 7.92% series, due 2027
25,000 26,707 25,000 26,883 
Medium-term notes, 6.76% series, due 2027
7,500 7,823 7,500 7,800 
Notes, 5.8%, due 2027
300,000 311,610 300,000 309,180 
Notes, 3.7%, due 2028
300,000 291,240 300,000 285,300 
Notes, 5.45%, due 2028
300,000 309,360 300,000 307,170 
Notes, 2.2%, due 2030
450,000 398,970 450,000 382,635 
Notes, 4.05%, due 2032
600,000 570,300 600,000 563,940 
Notes, 6.1%, due 2041
125,000 134,025 125,000 126,238 
Notes, 4.875%, due 2043
250,000 225,975 250,000 214,050 
Notes, 3.8%, due 2046
300,000 238,230 300,000 225,240 
Notes, 4.15%, due 2049
300,000 241,830 300,000 236,370 
Notes, 3.18%, due 2051
300,000 200,670 300,000 197,760 
Unamortized discount and debt issuance costs(27,273)(29,594)
3,305,227 3,302,906 
Revolving credit facility and commercial paper    
Industrial development revenue bonds:
Tax-exempt Series A, due 202850,000 50,000 50,000 50,000 
2003 Series A, due 203850,000 50,000 50,000 50,000 
2008 Series A, due 203850,000 50,000 50,000 50,000 
2009 Series A, due 203950,000 50,000 50,000 50,000 
Unamortized discount and debt issuance costs(1,598)(1,363)
198,402 198,637 
Less: current maturities  
Southwest Gas Corporation total long-term debt, less current maturities3,503,629 3,501,543 
Southwest Gas Holdings, Inc.:
Centuri secured term loan facility731,375 727,718 994,238 996,723 
Centuri secured revolving credit facility116,378 116,456 77,121 77,205 
Other debt obligations73,655 71,584 96,599 92,209 
Unamortized discount and debt issuance costs(12,627)(17,111)
Less: current maturities(30,264)(42,552)
Southwest Gas Holdings, Inc. total long-term debt, less current maturities$4,382,146 $4,609,838 

22

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

Southwest has a $400 million credit facility that was otherwise scheduled to expire in April 2025. However, in August 2024, Southwest entered into a new agreement to replace its existing credit facility. The agreement extends the maturity date to August 2029 and makes other miscellaneous changes, while the operation, designations, and key business terms are comparable to the prior facility. In regard to the facility in place as of September 2024, Southwest has designated $150 million of associated capacity as long-term debt and the remaining $250 million for working capital purposes. At September 30, 2024, the applicable margin is 1.125% for loans bearing interest with reference to the Secured Overnight Financing Rate (“SOFR”) and 0.125% for loans bearing interest with reference to the alternative base rate. At September 30, 2024, no borrowings were outstanding on the long-term portion (including under the commercial paper program), nor under the short-term portion of the facility.
Centuri has a $1.545 billion secured revolving credit and term loan multi-currency facility. Amounts can be borrowed in either Canadian or U.S. dollars. The revolving credit facility matures on August 27, 2026 and the term loan facility matures on August 27, 2028. On May 13, 2024, Centuri amended its revolving credit facility to transition from Canadian Dollar Offered Rate benchmarks to Canadian Overnight Repo Rate Average (“CORRA”). The applicable margin for the revolving credit facility ranges from 1.0% to 2.5% for SOFR and CORRA loans and from 0.0% to 1.5% for “base rate” loans, depending on Centuri’s total net leverage ratio. The applicable margin for the term loan facility is 1.50% for base rate loans and 2.50% for SOFR loans. The capacity of the line of credit portion of the facility is $400 million; related amounts borrowed and repaid are available to be re-borrowed. The term loan portion of the facility has a limit of $1.145 billion. Centuri’s assets securing the facility at September 30, 2024 totaled $2.4 billion. At September 30, 2024, $847.8 million in borrowings were outstanding under Centuri’s combined secured revolving credit and term loan facility.
On March 22, 2024, Centuri amended the financial covenants of its revolving credit facility and was required to maintain certain net leverage ratios. However, the amendment also provided that, in the event that a “Qualified IPO” (as defined in the amendment) is consummated prior to March 31, 2025, the maximum net leverage ratio would be reduced based on the amount of net proceeds received from such Qualified IPO. Pursuant to these terms, the completion of the Centuri IPO (which constituted a “Qualified IPO” for purposes of the amendment) resulted in a change to the maximum net leverage ratio. Based on the amount of proceeds received, Centuri was required to maintain a net leverage ratio of less than a maximum of 5.25 to 1.00 from April 18, 2024 through June 30, 2024, 5.00 to 1.00 from July 1, 2024 through September 29, 2024, 4.25 to 1.00 from September 30, 2024 through December 29, 2024, and 4.00 to 1.00 on December 30, 2024 and thereafter. The terms of the Centuri credit facility otherwise remain unchanged. Following the Centuri IPO and private placement, Centuri used approximately $316 million of proceeds to pay down $156 million of debt under the existing line of credit and $160 million of debt under the term loan portion of the facility, with the remainder of the IPO proceeds used for general corporate purposes.
Short-Term Debt
Southwest Gas Holdings, Inc. has a $300 million credit facility that is scheduled to expire in December 2026 and is primarily used for short-term financing needs. There was $113 million outstanding under this credit facility as of September 30, 2024.
In April 2023, Southwest Gas Holdings, Inc. entered into a $550 million Term Loan Credit Agreement (the “Term Loan”) that was set to mature in October 2024. Southwest Gas Holdings, Inc. utilized a majority of the proceeds to make an equity contribution to Southwest. In August 2024, the Company amended its Term Loan agreement, which extended the maturity date to July 31, 2025 and changed the interest with reference to SOFR from an applicable margin of 1.300% to 1.125%, among other miscellaneous changes.
As indicated above, under Southwest’s $400 million credit facility, no short-term borrowings were outstanding as of September 30, 2024.
Note 6 – Other Comprehensive Income and Accumulated Other Comprehensive Income
The following information presents the Company’s Other comprehensive income (loss), both before and after-tax impacts, within the Condensed Consolidated Statements of Comprehensive Income, which also impacts Accumulated other comprehensive income (“AOCI”) in the Condensed Consolidated Balance Sheets and the Condensed Consolidated Statements of Equity.

23

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

Related Tax Effects Allocated to Each Component of Other Comprehensive Income (Loss):
Three Months Ended
September 30, 2024
Three Months Ended
September 30, 2023
(Thousands of dollars)
Before-
Tax
Amount
Tax
(Expense)
or Benefit (1)
Net-of-
Tax
Amount
Before-
Tax
Amount
Tax
(Expense)
or Benefit (1)
Net-of-
Tax
Amount
Defined benefit pension plans:
Amortization of prior service cost$44 $(11)$33 $44 $(11)$33 
Amortization of net actuarial (gain)/loss1,910 (458)1,452 333 (80)253 
Regulatory adjustment(1,448)347 (1,101)(118)28 (90)
Total other comprehensive income (loss) - Southwest Gas Corporation506 (122)384 259 (63)196 
Foreign currency translation adjustment1,675  1,675 (2,261) (2,261)
Total other comprehensive income (loss)2,181 (122)2,059 (2,002)(63)(2,065)
Total other comprehensive income (loss) - noncontrolling interest (2)
(319) (319)   
Total other comprehensive income (loss) - Southwest Gas Holdings, Inc.$1,862 $(122)$1,740 $(2,002)$(63)$(2,065)
Nine Months Ended
September 30, 2024
Nine Months Ended
September 30, 2023
(Thousands of dollars)
Before-
Tax
Amount
Tax
(Expense)
or Benefit (1)
Net-of-
Tax
Amount
Before-
Tax
Amount
Tax
(Expense)
or Benefit (1)
Net-of-
Tax
Amount
Defined benefit pension plans:
Amortization of prior service cost$132 $(33)$99 $132 $(33)$99 
Amortization of net actuarial (gain)/loss5,730 (1,375)4,355 1,000 (240)760 
Regulatory adjustment(4,343)1,043 (3,300)(356)86 (270)
Total other comprehensive income (loss) - Southwest Gas Corporation1,519 (365)1,154 776 (187)589 
Foreign currency translation adjustment(2,296) (2,296)130  130 
Total other comprehensive income (loss)(777)(365)(1,142)906 (187)719 
Total other comprehensive (income) loss - noncontrolling interest (2)
(150) (150)   
Total other comprehensive income (loss) - Southwest Gas Holdings, Inc.$(927)$(365)$(1,292)$906 $(187)$719 
(1)Tax amounts are calculated using a 24% rate. The Company has elected to indefinitely reinvest, in Canada, the earnings of Centuri’s Canadian subsidiaries, thus precluding deferred taxes on such earnings. As a result of this assertion, and no repatriation of earnings anticipated, the Company is not recognizing a tax effect or presenting a tax expense or benefit for currency translation adjustments reported in Other comprehensive income (loss).
(2)Amount reflects the portion of the foreign currency translation adjustment attributable to the noncontrolling interest in Centuri following the Centuri IPO.
The following table represents a rollforward of AOCI, presented on the Company’s Condensed Consolidated Balance Sheets and its Condensed Consolidated Statements of Equity:
 Defined Benefit PlansForeign Currency Items 
(Thousands of dollars)
Before-TaxTax
(Expense)
Benefit (3)
After-TaxBefore-TaxTax
(Expense)
Benefit
After-TaxAOCI
Beginning Balance AOCI December 31, 2023
$(53,352)$12,804 $(40,548)$(3,239)$ $(3,239)$(43,787)
Foreign currency translation adjustment— — — (2,296) (2,296)(2,296)
Amortization of prior service cost (1)132 (33)99 — — — 99 
Amortization of net actuarial loss (1)5,730 (1,375)4,355 — — — 4,355 
Regulatory adjustment (2)(4,343)1,043 (3,300)— — — (3,300)
Net current period other comprehensive income (loss)1,519 (365)1,154 (2,296) (2,296)(1,142)
Less current period other comprehensive (income) loss attributable to noncontrolling interest (4)
   (150) (150)(150)
Centuri IPO (5)
   1,204  1,204 1,204 
Net current period other comprehensive income (loss) attributable to Southwest Gas Holdings, Inc.1,519 (365)1,154 (1,242) (1,242)(88)
Ending Balance AOCI September 30, 2024
$(51,833)$12,439 $(39,394)$(4,481)$ $(4,481)$(43,875)
(1)These AOCI components are included in the computation of net periodic benefit cost (see Note 2 – Components of Net Periodic Benefit Cost for additional details).

24

SOUTHWEST GAS HOLDINGS, INC.  Form 10-Q
SOUTHWEST GAS CORPORATION  September 30, 2024

(2)The regulatory adjustment represents the portion of the activity above that is expected to be recovered through rates in the future (the related regulatory asset is included in Deferred charges and other assets on the Company’s and Southwest’s Condensed Consolidated Balance Sheets).
(3)Tax amounts are calculated using a 24% rate.
(4)Amount reflects the foreign currency translation adjustment attributable to the noncontrolling interest in Centuri following the Centuri IPO.
(5)Amount reflects the attributed proportion of the AOCI balance associated with the ownership interests in Centuri held by the new investors as of the Centuri IPO date, amounts for which were reclassified from AOCI to Additional paid-in capital on the Company’s Condensed Consolidated Balance Sheet.
The following table represents a rollforward of AOCI, presented on Southwest’s Condensed Consolidated Balance Sheets:
 Defined Benefit Plans
(Thousands of dollars)Before-Tax
Tax
(Expense)
Benefit (8)
After-Tax
Beginning Balance AOCI December 31, 2023
$(53,352)$12,804 $(40,548)
Amortization of prior service cost (6)
132 (33)99 
Amortization of net actuarial loss (6)
5,730 (1,375)4,355 
Regulatory adjustment (7)
(4,343)1,043 (3,300)
Net current period other comprehensive income attributable to Southwest Gas Corporation1,519 (365)1,154 
Ending Balance AOCI September 30, 2024
$(51,833)$12,439 $(39,394)
(6)These AOCI components are included in the computation of net periodic benefit cost (see Note 2 – Components of Net Periodic Benefit Cost for additional details).
(7)The regulatory adjustment represents the portion of the activity above that is expected to be recovered through rates in the future (the related regulatory asset is included in Deferred charges and other assets on Southwest’s Condensed Consolidated Balance Sheets).
(8)Tax amounts are calculated using a 24% rate.
The following table represents amounts (before income tax impacts) included in AOCI (in the tables above), that have not yet been recognized in net periodic benefit cost:
(Thousands of dollars)
September 30, 2024December 31, 2023
Net actuarial loss$(356,238)$(361,968)
Prior service cost(1,046)(1,178)
Less: amount recognized in regulatory assets305,451 309,794 
Recognized in AOCI$(51,833)$(53,352)
Note 7 – Segment Information
The Company has two reportable segments. Southwest comprises the natural gas distribution segment and Centuri comprises the utility infrastructure services segment. As a result of the MountainWest sale in February 2023 (previously comprising the pipeline and storage segment), the information for the nine months ended September 30, 2023 presented below for MountainWest reflects activity from January 1, 2023 through February 13, 2023 (the last full day of its ownership by the Company).
Centuri accounts for services provided to Southwest at contractual prices. Accounts receivable for these services, which are not eliminated during consolidation, are presented in the table below:
(Thousands of dollars)
September 30, 2024December 31, 2023
Centuri accounts receivable for services provided to Southwest$7,330 $13,017 
In order to reconcile the table below to net income (loss) as disclosed in the Condensed Consolidated Statements of Income, an Other column is included associated with impacts of corporate and administrative activities related to

25


Southwest Gas Holdings, Inc. The financial information pertaining to the natural gas distribution, utility infrastructure services, and pipeline and storage segments are as follows:
(Thousands of dollars)
Natural Gas
Distribution
Utility Infrastructure
Services
Pipeline and StorageOtherTotal
Three Months Ended September 30, 2024
Revenues from external customers$359,131 $692,822 $ $— $1,051,953 
Intersegment revenues 27,231  — 27,231 
Total$359,131 $720,053 $ $— $1,079,184 
Segment net income (loss)$572 $9,956 $ $(10,239)$289 
Three Months Ended September 30, 2023
Revenues from external customers$394,603 $745,639 $ $— $1,140,242 
Intersegment revenues 29,250  — 29,250 
Total$394,603 $774,889 $ $— $1,169,492 
Segment net income (loss)$(3,251)$17,956 $ $(11,474)$3,231 

(Thousands of dollars)
Natural Gas
Distribution
Utility Infrastructure
Services
Pipeline and StorageOtherTotal
Nine Months Ended September 30, 2024
Revenues from external customers$1,922,157 $1,840,961 $ $— $3,763,118 
Intersegment revenues 79,190  — 79,190 
Total$1,922,157 $1,920,151 $ $— $3,842,308 
Segment net income (loss)$163,991 $(21,220)$ $(36,412)$106,359 
Nine Months Ended September 30, 2023
Revenues from external customers$1,797,348 $2,145,601 $35,132 $— $3,978,081 
Intersegment revenues 88,360  — 88,360 
Total$1,797,348 $2,233,961 $35,132 $— $4,066,441 
Segment net income (loss)$150,565 $24,902 $(16,288)$(81,159)$78,020 
The corporate and administrative activities for Southwest Gas Holdings, Inc. in the three months ending September 30, 2024 include approximately $11.5 million of interest expense, including amounts incurred under the $550 million Term Loan entered into in April 2023, along with the types of costs customarily incurred at the corporate/holding company level, offset by tax benefits experienced during the quarter.
Note 8 - Centuri Separation
In April 2024, the Company and Centuri Holdings, Inc. announced the completion of the Centuri IPO of 12,400,000 shares of Centuri’s common stock at a price of $21.00 per share. Centuri granted the underwriters a 30-day option to purchase up to an additional 1,860,000 shares of its common stock, which was exercised. In addition, Centuri announced the concurrent private placement of an additional 2,591,929 shares at a price equal to the Centuri IPO price, with Icahn Partners LP and Icahn Partners Master Fund LP, investment entities associated with Carl C. Icahn. Centuri’s common stock is listed on the New York Stock Exchange under the symbol “CTRI” and began trading on April 18, 2024. The net proceeds to Centuri from the Centuri IPO and the concurrent private placement, after deducting underwriting discounts and commissions of $18 million and offering expenses, were approximately $328 million. Centuri used the proceeds to repay a portion (approximately $316 million) of outstanding indebtedness under its revolving credit and term loan facility, with the remainder for general corporate purposes.
After completion of the Centuri IPO, the Company owns approximately 81% of all ownership interests in Centuri, and continues to consolidate the financial results of Centuri. As of the IPO date, management determined the carrying value of the noncontrolling interest based on the relationship that the ownership interest of the new investors bears to the carrying value (net

26


assets) of Centuri (as reflected in the Company’s consolidated financial information). The difference between the fair value of proceeds from the Centuri IPO and the carrying value of the noncontrolling interest is reflected as an increase in Additional paid-in capital of the Company. As of September 30, 2024, $176.9 million is reflected as equity attributable to noncontrolling interest in the Company’s Condensed Consolidated Balance Sheet. Net income attributable to noncontrolling interests for the three- and nine- months ended September 30, 2024 were $2.3 million and $4.2 million, respectively, which reflect from the time of the closing of the Centuri IPO on April 22, 2024 through the period ended September 30, 2024. Refer to the Company’s Condensed Consolidated Statement of Income and the Condensed Consolidated Statement of Equity for impacts associated with the noncontrolling interest in Centuri.
The following reflects the effects of changes in the Company’s ownership interest in Centuri on the Company’s equity:
Nine Months Ended
September 30,
(Thousands of dollars)2024
Net income attributable to Southwest Gas Holdings, Inc.$106,359 
Increase in additional paid-in capital as a result of Centuri IPO154,287 
Change from net income attributable to Southwest Gas Holdings, Inc. and transfers from noncontrolling interest
$260,646 
The Company intends to further reduce its ownership in future periods by means of: sales of its remaining Centuri shares into the market, a distribution of Centuri shares to Company stockholders, an exchange of Centuri shares for Southwest Gas Holdings, Inc. shares, or a combination thereof. The Company entered into several agreements with Centuri Holdings, Inc. in connection with the Centuri IPO and the planned separation of Centuri, providing a framework for the relationship between the Company and Centuri after the Centuri IPO, including a Separation Agreement, a Tax Matters Agreement, and a Registration Rights Agreement. Centuri’s new Board of Directors includes certain overlapping board members with the Company, including Andrew W. Evans, Anne L. Mariucci, and Karen S. Haller (the Company’s Chief Executive Officer).

27


ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Southwest Gas Holdings, Inc. is a holding company that owns all of the shares of common stock of Southwest Gas Corporation (“Southwest” or the “natural gas distribution” segment), until April 22, 2024, all of the shares of common stock of Centuri Group, Inc. (the “utility infrastructure services” segment), and until February 14, 2023, all of the shares of common stock of MountainWest Pipelines Holding Company (“MountainWest”). Southwest Gas Holdings, Inc. and its subsidiaries are collectively referred to as the “Company.” References to “Centuri” relate to Centuri Group, Inc., for periods prior to April 22, 2024, or subsequently, to Centuri Holdings, Inc.
In December 2022, the Company announced that its Board of Directors (the “Board”) unanimously determined to take strategic actions to simplify the Company’s portfolio of businesses. These actions included entering into a definitive agreement to sell 100% of MountainWest in an all-cash transaction that closed on February 14, 2023. Additionally, the Company determined it would pursue a separation of Centuri, including forming a new independent publicly traded utility infrastructure services company.
In April 2024, the Company and Centuri Holdings, Inc. announced the completion of an initial public offering (“IPO”) of Centuri’s common stock, with the issuance of 14,260,000 shares ($0.01 par value) at a price of $21.00 per share, along with a concurrent private placement of 2,591,929 shares, at a price equal to the IPO price, with Icahn Partners LP and Icahn Partners Master Fund LP, investment entities associated with Carl C. Icahn. The Company owns approximately 81% of Centuri following these events. Through the first quarter of 2024 and leading up to the IPO, Centuri was a wholly owned subsidiary of Southwest Gas Holdings, Inc. The net proceeds to Centuri from the IPO and the concurrent private placement totaled approximately $328 million, including optional purchase of IPO shares from underwriters. The Company intends to further reduce its ownership interest in future periods by means of: sales of its remaining Centuri shares into the market, a distribution of Centuri shares to Company stockholders, an exchange of Centuri shares for Southwest Gas Holdings, Inc. shares, or a combination thereof.
Our business includes Southwest, which is engaged in the business of purchasing, distributing, and transporting natural gas for customers in portions of Arizona, Nevada, and California. Southwest is the largest regulated distributor of natural gas in Arizona and Nevada, and also distributes and transports natural gas for customers in portions of California. Additionally, through its subsidiaries, Southwest operates two regulated interstate pipelines serving portions of Nevada and California. Southwest makes investments in infrastructure to support customer demand associated with population growth and economic development activity and the safe and reliable operation of its system through adherence to integrity management programs.
As of September 30, 2024, Southwest had 2,248,000 residential, commercial, industrial, and other natural gas customers, of which 1,205,000 customers were located in Arizona, 837,000 in Nevada, and 206,000 in California. Over the past twelve months, first-time meter sets were approximately 41,000, comparable to the number of new meter sets during the twelve months ended September 30, 2023. Residential and small commercial customers represented over 99% of the total customer base. During the twelve months ended September 30, 2024, 53% of operating margin (Regulated operations revenues less the net cost of gas sold) was earned in Arizona, 35% in Nevada, and 12% in California. During this same period, Southwest earned 86% of its operating margin from residential and small commercial customers, 4% from other sales customers, and 10% from transportation customers. These patterns are expected to remain materially consistent for the foreseeable future.
Southwest recognizes operating revenues from the distribution and transportation of natural gas (and related services) to customers. Operating margin is a financial measure defined by management as Regulated operations revenues less the net cost of gas sold. However, operating margin is not specifically defined in accounting principles generally accepted in the United States (“U.S. GAAP”). Thus, operating margin is considered a non-GAAP measure. Management uses this financial measure because Regulated operations revenues include the net cost of gas sold, which is a tracked cost that is passed through to customers without markup under purchased gas adjustment (“PGA”) mechanisms. Fluctuations in the net cost of gas sold impact revenues on a dollar-for-dollar basis, but do not impact operating margin or operating income. Therefore, management believes operating margin provides investors and other interested parties with useful and relevant information to analyze Southwest’s financial performance in a rate-regulated environment. The principal factors affecting changes in operating margin are general rate relief (including impacts of infrastructure trackers) and customer growth. Commission decisions on the amount and timing of relief may impact our earnings. Refer to the Summary Operating Results table below for a reconciliation of gross margin to operating margin, and refer to Rates and Regulatory Proceedings, in this Management’s Discussion and Analysis, for details of various rate proceedings.
The demand for natural gas is seasonal, with greater demand in the colder winter months and decreased demand in the warmer summer months. All of Southwest’s service territories have decoupled rate structures (alternative revenue programs), which are designed to eliminate the direct link between volumetric sales and revenue, thereby mitigating the impacts of weather

28


variability and conservation on operating margin, allowing Southwest to pursue energy efficiency initiatives. Nearly all of our customers, and resulting revenue and margin, are included as part of mechanisms that reduce the impact of weather and volume variability on our earnings.
Centuri is a strategic infrastructure services company that partners with regulated utilities to build and maintain the energy network that fuels millions of homes and businesses across the United States (“U.S.”) and Canada. With a commitment to serve as long-term partners to customers and communities, Centuri’s employees enable regulated utilities to safely and reliably deliver natural gas and electricity, as well as achieve their goals for environmental sustainability. Centuri operates in 88 primary locations across 45 states and provinces in the U.S. and Canada. It operates in the U.S., primarily as NPL, Neuco, Linetec, and Riggs Distler, and in Canada, primarily as NPL Canada.
Utility infrastructure services activity can be impacted by changes in infrastructure replacement programs and capital budgets of utilities, weather, and local and federal regulation (including tax rates and incentives). Utilities continue to implement or modify system integrity management programs to enhance safety pursuant to federal and state mandates. These programs have resulted in multi-year utility system replacement projects throughout the U.S. Likewise, there has been similar attention placed on electric grid modernization through national infrastructure legislation and related initiatives. Generally, Centuri revenues are lowest during the first quarter of the year due to less favorable winter weather conditions. Revenues typically improve as more favorable weather conditions occur during the summer and fall months. In cases of severe weather, such as following a regional storm, Centuri may be engaged to perform restoration activities related to above-ground utility infrastructure, and related results impacts are not solely within the control of management. In addition, in certain circumstances, such as with large bid contracts (especially those of a longer duration), or unit-price contracts with revenue caps, results may be impacted by differences between costs incurred and those anticipated when the work was originally bid. Work awarded, or failing to be awarded, by individual large customers can impact operating results.
All of our businesses may be impacted by economic conditions that impact businesses generally, such as inflationary impacts on goods and services consumed in the business, rising or sustained high interest rates, labor markets and costs (including in regard to contracted or professional services), and the availability of those resources. Certain of these impacts may be more predominant in certain of our operations, such as with regard to fuel costs for work equipment and skilled/trade labor costs at Centuri.
This Management’s Discussion and Analysis (“MD&A”) of Financial Condition and Results of Operations should be read in conjunction with the unaudited condensed consolidated financial statements and notes thereto included in this Quarterly Report on Form 10-Q and the audited financial statements and notes thereto, as well as the MD&A, included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023, in addition to the Risk Factors included in these documents as may be updated from time to time.

















29


Executive Summary
The items discussed in this Executive Summary are intended to provide an overview of the results of the Company’s and Southwest’s operations and are covered in greater detail in later sections of MD&A.
Summary Operating Results
 Period Ended September 30,
 Three Months Nine Months
(In thousands, except per share amounts)2024202320242023
Contribution to net income
Natural gas distribution$572 $(3,251)$163,991 $150,565 
Utility infrastructure services9,956 17,956 (21,220)24,902 
Pipeline and storage— — — (16,288)
Corporate and administrative(10,239)(11,474)(36,412)(81,159)
Net income$289 $3,231 $106,359 $78,020 
Weighted average common shares71,880 71,626 71,816 70,488 
Basic earnings per share
Consolidated$— $0.05 $1.48 $1.11 
Natural Gas Distribution
Reconciliation of Gross Margin to Operating Margin (Non-GAAP measure)
Utility Gross Margin$91,650 $80,852 $471,235 $443,005 
Plus:
Operations and maintenance (excluding Admin. & General) expense81,616 74,427 246,071 233,302 
Depreciation and amortization expense74,153 69,268 220,663 218,763 
Operating margin$247,419 $224,547 $937,969 $895,070 
3rd Quarter 2024 overview and other recent developments
Southwest Gas Holdings highlights include the following:
Finished the third quarter of 2024 with more than $450 million of cash on a consolidated basis; the Company no longer expects to issue equity in 2024, and continues to expect limited capital market needs through the end of 2025 (depending on the post-IPO Centuri separation execution form)
Extended the $550 million term loan credit agreement in the third quarter of 2024, which now matures on July 31, 2025, with a 17.5 basis point reduction in the applicable spread
Corporate and administrative results at the parent holding company reflect lower expense levels and an improvement overall compared to the same period in 2023
Natural gas distribution highlights include the following:
Following earlier refreshed Nevada rates in April 2024, Great Basin rates were effective September 2024 (subject to refund), and the California rate case was filed in the third quarter of 2024; advanced Arizona rate case
Continuation of record twelve-month operating margin of $1.3 billion
41,000 first-time meters sets occurred over the past 12 months
Finished the quarter with over $400 million in cash (given collection of previously deferred purchased gas costs)
Extended the $400 million revolving credit facility in the third quarter of 2024, which now expires in August 2029
$644 million capital investment year-to-date
Utility infrastructure services highlights include the following:
Revenues of $720 million in the third quarter of 2024 reflect a decrease of $54.8 million, or 7%, compared to the third quarter of 2023 (which included favorable weather and more offshore wind and storm restoration work)
Operating income was $41.9 million in the third quarter of 2024, a decrease of $11 million, compared to the third quarter 2023 operating income
Entered into an accounts receivable securitization facility, resulting in incremental cash as of September 30, 2024
Capital allocation discipline and efficient asset utilization resulted in reductions in depreciation expense

30


Results of Natural Gas Distribution
Quarterly Analysis
Three Months Ended
September 30,
(Thousands of dollars)20242023
Regulated operations revenues$359,131 $394,603 
Net cost of gas sold111,712 170,056 
Operating margin247,419 224,547 
Operations and maintenance expense129,736 122,270 
Depreciation and amortization74,153 69,268 
Taxes other than income taxes22,283 21,147 
Operating income21,247 11,862 
Other income16,665 14,537 
Net interest deductions42,312 35,772 
Loss before income taxes
(4,400)(9,373)
Income tax benefit(4,972)(6,122)
Contribution to consolidated results$572 $(3,251)
Results from natural gas distribution operations improved $3.8 million between the third quarters of 2024 and 2023. The improvement was primarily due to an increase in Operating margin and Other income, offset by an increase in Operations and maintenance expense, Depreciation and amortization, and net interest deductions.
Operating margin increased $22.9 million quarter over quarter. Combined rate relief in Nevada and California added approximately $16 million of incremental margin, and an additional $2 million was attributable to customer growth, including approximately 41,000 first-time meter sets during the last twelve months. The combined impacts of increases in recovery/return associated with regulatory account balances ($1 million), and the variable interest expense adjustment mechanism in Nevada ($2 million) (for which amortization is recognized in interest expense), also resulted in incremental margin between comparable periods. The remaining variance primarily relates to changes in other miscellaneous revenue and revenue from customers outside of the decoupling mechanisms.
Operations and maintenance expense increased $7.5 million or 6% between quarters. General cost increases (net of amounts capitalized in Gas plant, where relevant, to support construction efforts) were experienced in a variety of areas, including $3.2 million (combined) of incremental labor-related and benefit costs, including incentive compensation costs, $1.6 million (combined) of incremental leak survey and line locating costs, $1.1 million of higher insurance costs, and $1.2 million of increased reserves for customer accounts deemed uncollectible. These increases, and others, were partially offset by a reduction in certain external contractor and professional services expenses.
Depreciation and amortization expense increased $4.9 million, or 7%, between quarters, primarily due to a $755 million, or 8% increase in average gas plant in service since the corresponding third quarter of 2023, in addition to $1 million of increased amortization related to regulatory account balances. The increase in plant was attributable to pipeline capacity reinforcement work, franchise requirements, scheduled pipe replacement activities, and new infrastructure.
Other income (which is net of other deductions) increased $2.1 million between quarters. The increase was primarily driven by a $4.7 million increase in values associated with company-owned life insurance (“COLI”) policies and a $1.9 million increase in the equity portion of the allowance for funds used during construction. Offsetting these increases was a $1 million increase in non-service-related costs associated with employee pension and other postretirement benefits and a $4.5 million decrease in interest income primarily reflecting a reduction in carrying charges associated with regulatory account balances, notably, deferred purchased gas cost balances, which, on a combined basis, decreased from an asset balance of $687 million as of September 30, 2023 to a net liability balance of $180 million as of September 30, 2024. Interest is earned when balances are assets and interest expense is incurred when balances are liabilities.
Net interest deductions increased approximately $6.5 million in the third quarter of 2024, as compared to the prior-year quarter, primarily due to the regulatory treatment associated with Southwest’s industrial development revenue bonds (the variable interest expense mechanism noted above), which incorporates the impacts of deferrals and return/recoveries. Surcharges/surcredits associated with the mechanism are included in revenue/operating margin when included in customer rates; however, related regulatory account amortization is reflected in interest expense. Additionally contributing to the increase was interest

31


incurred on the over-collected balance of the PGA, and a lower level of debt-related allowance for funds used during construction (“AFUDC”). By its nature, debt-related AFUDC is recognized as a reduction/offset to interest expense; however, such offsetting amounts were lower in the third quarter of 2024 (more pronounced in the third quarter of 2023), thereby increasing interest expense between comparative periods.
Results of Natural Gas Distribution
Nine-Month Analysis
Nine Months Ended
September 30,
(Thousands of dollars)20242023
Regulated operations revenues$1,922,157 $1,797,348 
Net cost of gas sold984,188 902,278 
Operating margin937,969 895,070 
Operations and maintenance expense390,229 378,189 
Depreciation and amortization220,663 218,763 
Taxes other than income taxes66,414 65,491 
Operating income260,663 232,627 
Other income48,976 51,722 
Net interest deductions118,595 111,498 
Income before income taxes191,044 172,851 
Income tax expense27,053 22,286 
Contribution to consolidated results$163,991 $150,565 
Results from natural gas distribution operations improved approximately $13 million between the first nine months of 2024 and 2023. The improvement was primarily due to an increase in Operating margin, offset by an increase in Operations and maintenance expense and Net interest deductions.
Operating margin increased $43 million period over period. Approximately $9 million of incremental margin was attributable to customer growth, including approximately 41,000 first-time meter sets during the last twelve months. Combined rate relief across all our service territories added approximately $44 million of incremental margin. Favorable impacts ($6.4 million, combined) were also realized in connection with certain rate components of infrastructure trackers and the Nevada variable interest expense mechanism. Furthermore, late fee assessments on customer account balances provided approximately $3 million in incremental margin. Offsetting these increases was a decrease in recoveries associated with other regulatory programs, totaling $8.6 million, for which an associated comparable decrease is also reflected in amortization expense (discussed below). In addition, an $8 million out-of-period favorable gas cost adjustment in the prior-year period did not recur in 2024. Customary gas used in operations (the effects of which are offset in Operations and maintenance expense) also reduced operating margin ($3.8 million) in the current period. Changes in miscellaneous revenue and customers outside of the decoupling mechanisms comprise the remaining variance.
Operations and maintenance expense increased $12 million, or 3%, between periods. General cost increases (net of amounts capitalized in Gas plant, where relevant, to support construction efforts), were experienced in a variety of areas, including $7.6 million of (combined) incremental employee labor-related and benefit costs, including incentive compensation costs, $5.3 million (combined) of incremental leak survey and line locating costs, and $2 million in higher insurance costs. These increases, along with others, were partially offset by impacts from the cost of fuel used in operations as noted above and a reduction in other contractor and professional services.
Depreciation and amortization expense increased approximately $1.9 million, or 1%, between periods, due primarily to an increase in depreciation on gas plant, reflective of a $710 million, or 7%, increase in average gas plant in service since the corresponding period of 2023. The increase in plant was attributable to pipeline capacity reinforcement work, franchise requirements, scheduled pipe replacement activities, and new infrastructure. This increase was largely offset by a decrease of $8.6 million in amortization associated with the recovery of regulatory program balances (noted earlier), including a sizeable difference in the amount of the California Climate Credit between periods.
Other income (which is net of other deductions) decreased approximately $2.7 million. Interest income declined $12.6 million between periods primarily reflecting a reduction to carrying charges associated with regulatory account balances, notably, deferred purchased gas cost balances, which decreased from an asset balance of $687 million as of September 30, 2023 to a net

32


liability balance of $180 million as of September 30, 2024. Additionally, non-service-related costs associated with employee pension and other postretirement benefits increased by $3 million. Offsetting these was a $5.5 million increase in the equity portion of the allowance for funds used during construction, a $3 million increase in values associated with COLI policies (the comparative prior-year period also included net death benefits), and $3.8 million related to nonrecoverable software write-offs and market adjustments on other property in the prior year period that did not recur in 2024.
Net interest deductions increased $7.1 million in the first nine months of 2024, as compared to the prior-year period, including the impacts of the regulatory treatment associated with Southwest’s industrial development revenue bonds, and due to a lower level of debt-related AFUDC, which had the impact of increasing interest expense on a relative basis in 2024. Offsetting these impacts was a decrease in interest related to the payoff in April 2023 of a $450 million term loan.
Results of Utility Infrastructure Services
Quarterly Analysis
Three Months Ended
September 30,
(Thousands of dollars)20242023
Utility infrastructure services revenues$720,053 $774,889 
Operating expenses:
Utility infrastructure services expenses644,928 685,687 
Depreciation and amortization33,208 36,252 
Operating income 41,917 52,950 
Other income (deductions)160 108 
Net interest deductions23,925 26,131 
Income before income taxes18,152 26,927 
Income tax expense5,822 8,235 
Net income12,330 18,692 
Net income attributable to noncontrolling interests2,374 736 
Contribution to consolidated results $9,956 $17,956 
Utility infrastructure services revenues decreased $54.8 million, or 7%, in the third quarter of 2024 when compared to the prior-year quarter, driven primarily by decreased gas utility infrastructure services (“Gas”) revenues of $33.9 million and decreased electric utility infrastructure services (“Electric”) revenues of $14.3 million. The decrease in Gas revenues was primarily due to a reduction in net volumes under existing master services agreements (“MSAs”). The decrease in Electric revenues was primarily due to a decrease in offshore wind revenues of $38 million compared to the prior-year period, partially offset by an increase in emergency restoration services revenue of approximately $22.5 million.
Utility infrastructure services expenses decreased $40.8 million, or 6%, in the third quarter of 2024 when compared to the prior-year quarter due primarily to a lower volume of infrastructure services provided. Subcontractor costs, a significant component of these expenses, decreased during the third quarter of 2024 compared to the prior-year quarter primarily due to decreased work under offshore wind projects and changes in the mix of work. Profit margin in the third quarter of 2024 also decreased on a relative basis, primarily due to lower margins on bid work (as the prior year quarter benefited from a highly profitable project bid that did not recur in the current quarter), decreased volumes on MSAs leading to underutilization of fixed costs, and unfavorable changes in the mix of work. Included in total Utility infrastructure services expenses were general and administrative costs, which increased approximately $0.6 million between quarters. Gains on sale of equipment in the third quarter of 2024 and 2023 (reflected as an offset to Utility infrastructure services expenses) were approximately $0.7 million and $1.1 million, respectively.
Depreciation and amortization expense decreased $3 million between periods, primarily due to a number of small tools within Electric operations becoming fully depreciated in 2023 and not requiring replacement based on project needs. Additionally, more efficient utilization of existing fixed assets in recent periods has slowed the growth of the depreciable asset base, with capital expenditures of $106.6 million in 2023 compared to capital expenditures of $130.2 million in 2022, which impacted depreciation on a relative basis in the periods following.
The decrease in net interest deductions of $2.2 million between quarters was primarily due to a reduction in the average debt balance, as Centuri paid down $156 million of debt under its revolving credit facility and $160 million of debt under its term loan facility with proceeds from its April 2024 IPO and private placement.

33


Income tax expense decreased $2.4 million between quarters, primarily due to a decrease in pre-tax income in 2024.
Results of Utility Infrastructure Services
Nine-Month Analysis
Nine Months Ended
September 30,
(Thousands of dollars)20242023
Utility infrastructure services revenues$1,920,151 $2,233,961 
Operating expenses:
Utility infrastructure services expenses1,765,116 2,005,084 
Depreciation and amortization101,912 110,982 
Operating income53,123 117,895 
Other income (deductions)900 311 
Net interest deductions70,653 73,032 
Income (loss) before income taxes(16,630)45,174 
Income tax expense514 16,416 
Net income (loss)(17,144)28,758 
Net income attributable to noncontrolling interests4,076 3,856 
Contribution to consolidated results $(21,220)$24,902 
Utility infrastructure services revenues decreased $313.8 million, or 14%, in the first nine months of 2024 when compared to the corresponding period in the prior year driven primarily by decreases in Electric revenues of $163.2 million, and $129.6 million in Gas revenues. The decline in Electric revenues was primarily due to a net reduction in volumes under MSAs, as well as a decrease in offshore wind revenues of $71.4 million compared to the prior-year period. Included in Electric revenue was $87 million from emergency restoration services following storm damage to customers’ above-ground utility infrastructure throughout the U.S. during 2024, compared to $83.4 million in emergency restoration services in the prior year. The decrease in Gas revenues was primarily due to a reduction in net volumes under existing customer MSAs and timing of bid projects, as the prior year benefited from the commencement of a large project that has since been completed.
Utility infrastructure services expenses decreased $240 million, or 12%, between periods. The decrease was primarily due to lower volume of infrastructure services provided overall. Subcontractor costs, a significant component of these expenses, decreased during the first nine months of 2024 compared to the comparable prior-year period, primarily due to decreased work under offshore wind projects and changes in mix of work. Profit margin also decreased on a relative basis in the current period as compared to the prior period, due to lower margins on bid work, decreased volumes leading to underutilization of fixed costs, and unfavorable changes in the mix of work. General and administrative costs included in total utility infrastructure services expenses decreased approximately $3.9 million between comparative periods, primarily due to lower incentive compensation and lower corporate salary and benefit costs during the current period, partially offset by an increase in one-time severance cost. Gains on sale of equipment (reflected as an offset to Utility infrastructure services expenses) were approximately $2.7 million and $3 million for the nine months ended September 30, 2024 and 2023, respectively.
Depreciation and amortization expense decreased $9.1 million between the current and prior-year nine-month periods, primarily due to a number of small tools within Electric operations becoming fully depreciated in 2023 and not requiring replacement based on project needs. Additionally, more efficient utilization of existing fixed assets in recent periods has slowed the growth of the depreciable asset base, with capital expenditures of $106.6 million in 2023 compared to capital expenditures of $130.2 million in 2022.
The decrease in net interest deductions of $2.4 million between the current and prior-year nine-month periods was primarily due to a reduction in the average debt balance, as Centuri paid down $156 million of debt under its revolving credit facility and $160 million of debt under its term loan facility with proceeds from its April 2024 IPO and private placement.
Income tax expense decreased by $15.9 million between periods, primarily due to reduced pre-tax income during the nine-months ended September 30, 2024.

34


Rates and Regulatory Proceedings
Southwest is subject to the regulation of the Arizona Corporation Commission (“ACC”), the Public Utilities Commission of Nevada (the “PUCN”), and the California Public Utilities Commission (the “CPUC”), and two of Southwest’s subsidiaries are subject to regulation by the Federal Energy Regulatory Commission (the “FERC”).
Arizona Jurisdiction
Arizona General Rate Case. Southwest filed its 2024 Arizona rate case application in early February 2024, proposing an increase in revenue of approximately $126 million to reflect the continued significant capital investments in the state and to update rates to more closely align with Southwest’s current level of operations and maintenance expense. The request included a return on common equity of 10.15% and a 0.81% fair value increment, relative to a 50% target equity ratio and a proposed twelve-month post-test year adjustment for non-revenue producing plant. In addition to proposing the continuation of full revenue decoupling under the Delivery Charge Adjustment (“DCA”) mechanism, Southwest proposed the establishment of a System Improvement Benefit (“SIB”) mechanism, a capital tracker designed to support required code and regulatory-related infrastructure replacements. Southwest also proposed to set the carrying cost for the interest component of the DCA and Gas Cost Balancing Account (“GCBA”) rate adjustment mechanisms to equal the Commission-authorized Weighted Average Cost of Capital, and to establish an Unrecovered Gas Cost Expense Provision (“UGCE”), which represents the gas cost-related portion of net write-offs of uncollectible customer accounts. The UGCE would allow Southwest to more timely recover commodity and related components of such accounts. While testimony has been filed by the Utilities Division Staff of the ACC and intervenors in the case, management can provide no assurances as to the ultimate outcome. Additional testimony dates and hearings are scheduled for late November 2024. A decision is expected in the first quarter of 2025, with new rates anticipated to become effective in the second quarter of 2025. Southwest’s existing general rates became effective February 1, 2023 following the conclusion of the previous general rate case.
Delivery Charge Adjustment. The DCA, or Arizona decoupling mechanism, as described above, includes a filing each April, which along with other reporting requirements, contemplates a rate to return/recover the over- or under-collected margin balance. The existing rate to return the over-collected balance of $17.5 million existing as of March 31, 2024 was approved and became effective August 1, 2024.
Tax Reform. A Tax Expense Adjustor Mechanism (“TEAM”) was approved in Southwest’s 2019 general rate case to timely recognize tax rate changes resulting from federal or state tax legislation following the TEAM implementation. In addition, the TEAM tracks and returns/recovers the revenue requirement impact of changes in the amortization of excess accumulated deferred income taxes (“EADIT”), including that which resulted from 2017 U.S. federal tax reform, compared to the amount authorized in the most recently concluded rate case. Following the inaugural surcredit rate establishment under the TEAM mechanism in December 2022, Southwest has filed subsequent TEAM rate applications, including a recent filing, which proposed to update the TEAM surcredit to refund $5 million of additional estimated EADIT. The adjusted rate became effective June 1, 2024.
Customer-Owned Yard Line (“COYL”) Program. Southwest originally received approval, in connection with its 2010 Arizona general rate case, to implement a program to conduct leak surveys, and if leaks were present, to replace and relocate service lines and meters for Arizona customers whose meters were placed away from the customer’s home, representing a non-traditional configuration. The COYL program has been subject to proceedings to recover investments since that time. In February 2024, Southwest requested approval to recover the outstanding revenue requirement of approximately $1.8 million associated with 2023 COYL investments. The adjusted rate became effective June 15, 2024.
PGA Modification. On March 1, 2023, Southwest filed a request to adjust the interest rate applicable to the outstanding Purchased Gas Adjustment (“PGA”) balance to more closely match the interest expense incurred to finance the balance. In the alternative, the filing requested an expansion of the current GCBA adjustment to clear the balance then existing. In July 2023, the ACC approved an increase to the GCBA rate (over a two-year period) effective August 1, 2023, to support the timely recovery of the approximately $358 million balance as of May 31, 2023. The increased GCBA was authorized to remain in place for up to two years or until the balance dropped below $10 million. The GCBA rate was later set to $0.00 per therm, effective October 1, 2024, where it will remain until the under- or over-collected balance exceeds $10 million. The ongoing deferred energy rates, separate from the GCBA rates, continue to be updated monthly.

35


Nevada Jurisdiction
Nevada General Rate Case. Southwest filed its most recent general rate case in September 2023 based on the test year ended May 2023. The initial request was updated with a certification filing primarily for plant placed in service and incremental annual leak survey costs through November 2023. Those updates resulted in an updated overall request of $74 million, an increase over the initial request of $69.8 million. A stipulation was reached with Regulatory Operations Staff and the Bureau of Consumer Protection, settling certain issues, and agreeing to a black box settlement with a statewide increase of $65.6 million, before any adjustments for the cost of capital. Following a hearing on cost of capital issues, the PUCN issued a decision approving an annual increase in revenues of $59 million, approving the proposed settlement, and authorizing a return on common equity of 9.5%, including the use of a hypothetical capital structure of 50% debt and 50% equity. Included in the settled items were: a continuation of full revenue decoupling; authority to continue tracking incremental annual leak survey costs in a regulatory asset (discussed further below); and refreshed depreciation rates that are somewhat lower than proposed. New rates became effective in April 2024.
General Revenues Adjustment. The General Revenues Adjustment (“GRA”), or Nevada decoupling mechanism, was affirmed as part of Southwest’s most recently concluded general rate case and adjustments are included in the Annual Rate Adjustment (“ARA”) filings intended to update rates to recover/return amounts associated with various regulatory mechanisms, including the GRA. Southwest made its most recent ARA filing in November 2023 related to the approximate $8.7 million over-collected GRA balance as of September 30, 2023. Recovery of rates and adjustments thereto as part of the ARA primarily impact cash flows, but not net income overall. Updated rates for the GRA and other regulatory mechanisms included in the ARA filing became effective May 1, 2024, earlier than the typical July 1, 2024 effective date. The next ARA filing will be made in November 2024, considering balances as of September 30, 2024. Updated rates are anticipated July 1, 2025.
Nevada Leak Survey. In 2019, the PUCN opened an Investigation and Rulemaking action to consider certain amendments to the Nevada Administrative Code requiring annual leak surveys of distribution pipelines transporting natural gas or liquid petroleum. The increased survey activity was to focus on business districts and to be conducted generally on an annual basis (not exceeding 15-month survey intervals). The proposed regulations were permanently adopted effective January 1, 2023. Regulatory asset treatment was approved for the purpose of tracking incremental costs associated with implementing the increased leak surveys. Continuation of the program, along with recovery of earlier incurred amounts over a two-year period, was approved in conjunction with Southwest’s recently completed general rate case.
California Jurisdiction
California General Rate Case. Southwest filed its most recent general rate case in September 2024 related to a future test year (2026), proposing a statewide revenue increase of approximately $49 million, consisting of a revenue increase of $38.5 million for the southern California rate jurisdiction, an increase of $63,000 for the northern California rate jurisdiction, and an increase of $10.2 million for the South Lake Tahoe rate jurisdiction. The request is based on a capital structure consisting of 50% long-term debt and 50% common equity with a requested return on common equity of 11.35%, a modest increase to the 11.16% currently authorized. A continuation of Southwest’s Post Test Year (“PTY”) margin attrition adjustment for attrition years 2027 – 2030 is included, as well as continued use of the Automatic Trigger Mechanism in lieu of annual cost of capital filings. Southwest’s filing also includes a risk-based decision-making framework proposing the continuation of the Targeted Pipe Replacement Program, the Meter Protection Program, and COYL Program, along with the addition of a new Annual Leak Survey Program, collectively under the Infrastructure Reliability and Replacement Adjustment Mechanism umbrella. Authority to establish a Damage Prevention Cost Balancing Account to record and recover (or return) certain costs associated with damage prevention expenses, specifically those related to line locating activities, was also requested. Consolidation of Southwest’s northern California and South Lake Tahoe rate jurisdictions into a single rate-making jurisdiction is also proposed. The rate case will be processed during 2025 with a final decision expected in the fourth quarter of 2025, and new rates are expected to be effective in January 2026.
Attrition Filing. Following the 2021 implementation of rates approved as part of the previous general rate case, the continuation of annual PTY margin attrition increases of 2.75% began in January 2022. The most recent increase included the attrition component, along with adjustments related to the amortization of EADIT, the impact of the Automatic Trigger Mechanism on authorized rate base, and margin associated with the North Lake Tahoe Lateral replacement project. The Automatic Trigger Mechanism adjusts the rate of return up or down (in this case, up) as a result of changes in the average utility bond yield that exceed 100 basis points. The cumulative impact resulted in an annual increase of $11.6 million effective January 2024 for Southwest’s combined southern California, northern California, and South Lake Tahoe rate jurisdictions. The PTY increase of $4.7 million associated with the North Lake Tahoe Lateral revenue requirement became effective February 1, 2024.
Service Area Extension. Southwest filed a request to expand its southern California certificated service area, a Certificate of Public Convenience and Necessity (“CPCN”), to include the Army’s National Training Center at Fort Irwin, located northeast

36


of Barstow, California. The CPCN was approved by the CPUC in April 2024 and authorizes Southwest to construct approximately 21 miles of distribution main pipeline to deliver natural gas service to the newly certificated area of Fort Irwin, which at the time of filing was estimated to cost approximately $38.7 million.
FERC Jurisdiction
General Rate Case. Great Basin Gas Transmission Company (“Great Basin”), a wholly owned subsidiary of Southwest, filed notice of a change in rates (pursuant to applicable regulations) on March 6, 2024, requesting that rates for natural gas service subject to the filing be made effective April 6, 2024. The FERC, however, suspended the case for a five-month period, which allowed rates to go into effect, subject to refund, on September 6, 2024. The filing included a request to continue a term-differentiated rate structure which was adopted as part of Great Basin’s previous general rate case, provide an overall annual revenue increase of approximately $16 million, and a return on equity of 14.05% and 13.05% applicable to each category of shippers, as applicable, and a capital structure of 44% long-term debt and 56% common equity. A primary driver of the proposed increase was approximately $99 million of capital investments, much of which was placed in service by the end of the August 31, 2024 test year. Motion rates, subject to refund, became effective in September 2024, with an initial decision expected during the second quarter of 2025. A portion of the rates implemented subject to refund will be appropriately reserved pending the final outcome in the case.
PGA Filings
The rate schedules in all of Southwest’s service territories contain provisions that permit adjustment to rates as the cost of purchased gas changes. These deferred energy provisions and purchased gas adjustment clauses are collectively referred to as “PGA” clauses. Differences between gas costs recovered from customers and amounts paid for gas by Southwest result in over- or under-collections. Balances are recovered from or refunded to customers on an ongoing basis with interest. As of September 30, 2024, under-collections in California resulted in an asset of approximately $9.3 million and over-collections in Arizona and southern and northern Nevada resulted in a liability of approximately $189 million on the Company’s and Southwest’s Condensed Consolidated Balance Sheets. The substantial reduction in balances between periods in the table below reflects a combination of specific recovery rates in place to collect the build-up of earlier balances as a result of the cost paid for gas in those earlier periods, and recent conditions whereby base rates under the mechanisms have exceeded the cost of recent gas supply purchases by Southwest.
Filings to change rates in accordance with PGA clauses are subject to audit by state regulatory commission staffs. PGA changes impact cash flows but have no direct impact on operating margin. However, gas cost deferrals and recoveries can impact comparisons between periods of individual consolidated income statement components. These include Regulated operations revenues, Net cost of gas sold, Net interest deductions, and Other income (deductions).
The following table presents Southwest’s outstanding PGA balances receivable/(payable):
(Thousands of dollars)September 30, 2024December 31, 2023September 30, 2023
Arizona$(17,365)$251,416 $301,321 
Northern Nevada(32,153)45,757 56,975 
Southern Nevada(139,467)218,761 294,624 
California9,270 36,951 34,217 
$(179,715)$552,885 $687,137 
Capital Resources and Liquidity
Historically, cash on hand and cash flows from operations have provided a substantial portion of cash used in investing activities (primarily for construction expenditures and property additions). In recent years, Southwest has undertaken significant pipe replacement activities to fortify system integrity and reliability, including on an accelerated basis in association with certain gas infrastructure replacement programs. In addition, certain national events, including several major storms in recent years affecting central portions of the U.S., contributed to the periodic run-up in gas supply costs, before commodity costs significantly dropped in more recent periods. This collective activity necessitated the issuance of both debt and equity securities to supplement cash flows from operations, before cash reserves built up at the utility in more recent periods, including from collections under the PGA mechanisms. Southwest Gas Holdings, Inc. and Southwest’s capitalization strategy is to maintain an

37


appropriate balance of equity and debt to preserve investment-grade credit ratings, which help minimize interest costs. Investment-grade credit ratings have been maintained by Southwest Gas Holdings, Inc. and Southwest.
Cash Flows
Southwest Gas Holdings, Inc.:
Operating Cash Flows. Cash flows provided by consolidated operating activities increased $956 million in the first nine months of 2024 as compared to the same period of 2023. The increase was primarily driven by the collection of previously deferred purchased gas costs for Southwest. As noted above, in earlier periods rates billed to customers for gas supply costs were lower than actual expenditures. These differences were deferred and have since been collected, providing a significant source of available funds in the current period. The improvement in cash flows also reflects the impacts of changes in other components of working capital overall, including the timing and amount of accounts receivable/payable and other current asset and liability balances.
Investing Cash Flows. Cash flows from investing activities decreased $1.04 billion in the first nine months of 2024 as compared to the same period of 2023. The overall decrease was driven by $1.05 billion in proceeds received in connection with the MountainWest sale (net of cash sold) in 2023, partially offset by proceeds from the sale of other property in 2024. Outflows for construction expenditures and property additions were also higher in the first nine months of 2024.
Financing Cash Flows. Cash flows from consolidated financing activities increased $481 million in the first nine months of 2024 as compared to the same period of 2023. The overall increase was primarily due to activity in 2023, including the first quarter 2023 repayment ($1.1 billion) of the then remaining balance of the term loan entered into by Southwest Gas Holdings, Inc. in connection with the 2021 acquisition of MountainWest, offset by Southwest’s issuance of $300 million in 5.45% senior notes in March 2023 that will mature in 2028, as well as the Southwest Gas Holdings, Inc. proceeds received in April 2023 from a $550 million term loan now maturing in July 2025, in addition to various other borrowing and repayment activity. Net financing activities in 2024 include net proceeds received from Centuri’s April 2024 IPO and private placement ($328 million), with the majority of the proceeds used by Centuri to pay down portions of its revolving credit and term loan facility. Financing cash flows also include Centuri’s redemption of the previously remaining redeemable noncontrolling interest in Linetec for $92 million in 2024 (compared to $40 million of partial redemption in the comparable period in the prior year), in addition to utilization of its credit facility for this and other purposes. The prior year period also included proceeds received from the issuance of common stock in an underwritten public offering in March 2023, with no comparable issuance in the current year. Those proceeds were used at that time to pay down Company indebtedness. Other financing cash flows include borrowings and repayments under the companies’ credit facilities, and an increase in dividends paid between periods.
Corporate and administrative expenses/outflows for Southwest Gas Holdings, Inc. in the first nine months of 2024 overall primarily include interest paid on outstanding borrowings and costs associated with the Centuri separation. Combined borrowing costs and other corporate and administrative expenses of the holding company were substantially higher in 2023, primarily related to the strategic process and sale of MountainWest in that year.
The capital requirements and resources of the Company generally are determined independently for the individual business segments. Each business segment is generally responsible for securing its own debt financing sources. However, the holding company may raise funds through stock issuances or other external financing sources in support of each business segment.
Southwest Gas Corporation:
Operating Cash Flows. Cash flows provided by operating activities increased approximately $926 million in the first nine months of 2024 as compared to the same period of 2023. The improvement in operating cash flows was primarily attributable to the collection of deferred purchased gas costs (as discussed above), as well as cash flows from other working capital changes overall.
Investing Cash Flows. Cash used in investing activities increased $39 million in the first nine months of 2024 as compared to the same period of 2023. While outflows for capital expenditures increased by $63 million between periods, the current period also reflects inflows from the sale of property, as well as reduced outflows related to customer advances for construction. See also Natural Gas Distribution Segment Construction Expenditures, Debt Maturities, and Financing below.
Financing Cash Flows. Net cash from financing activities decreased $576 million in the first nine months of 2024 as compared to the same period of 2023. The decline was primarily due to activity in 2023, including proceeds from $300 million of 5.45% senior notes issued that year. Separately, parent contributions and term loan proceeds in 2023 exceeded short-term debt repayments (including of the term loan) that same year, with no similar comparable financing inflows in 2024. Outflows for dividend payments increased in the current period. Other impacts primarily relate to activity under Southwest’s credit facility in 2023. See Note 5 – Debt.

38


Natural Gas Distribution Segment Construction Expenditures, Debt Maturities, and Financing
During the nine-month period ended September 30, 2024, construction expenditures for the natural gas distribution segment were $644 million. The majority of these expenditures, approximately 55%, were associated with the replacement of existing transmission and distribution pipeline facilities to fortify system integrity and reliability, as well as other general plant expenditures, with the remainder related to new construction.
Management estimates natural gas segment construction expenditures during the three-year period ending December 31, 2026 will be approximately $2.4 billion. Of this amount, approximately $830 million is expected to be incurred during calendar year 2024. Southwest plans to continue to request regulatory support to undertake projects, or to accelerate projects as necessary for the improvement of system flexibility and reliability, or to expand, where relevant, to unserved or underserved areas. Southwest may expand existing, or initiate new, programs. Significant replacement activities are expected to continue well beyond the next few years. See also Rates and Regulatory Proceedings. In August 2024, Southwest entered into a new credit facility to replace the existing credit facility that was otherwise set to expire in 2025; the new agreement includes similar terms to the existing facility, but the new agreement extends the maturity date to 2029. Otherwise, Southwest has $75 million of long-term debt maturing in 2026, but no debt maturities in either 2024 or 2025. Also during that same three-year period, cash flows from operating activities of Southwest are expected to provide approximately 78% of the funding for gas operations of Southwest and total construction expenditures and dividend requirements. Any additional cash requirements, including construction-related, and any paydown or refinancing of debt, are expected to be provided by existing credit facilities, parent equity contributions, and/or other external financing sources. The timing, types, and amounts of additional external financings will be dependent on a number of factors, including the cost of gas purchases, conditions in capital markets, timing and amount of rate relief, timing and amount of surcharge collections from, or amounts returned to, customers related to regulatory mechanisms and programs, as well as growth levels in Southwest’s service areas and earnings. External financings may include the issuance of debt securities, bank and other short-term borrowings, and other forms of financing.
Dividend Policy
Dividends are payable on the Company’s common stock at the discretion of the Board. In setting the dividend rate, the Board considers, among other factors, current and expected future earnings levels, our ongoing capital expenditure plans, expected external funding needs, our payout ratio, and our ability to maintain investment-grade credit ratings and liquidity. The Company has paid dividends on its common stock since 1956. In February 2024, the Board determined to maintain the quarterly dividend at $0.62 per share, effective with the June 2024 payment. Although no assurances can be provided on our future dividend payments, the Board currently intends to reevaluate the dividend upon the completion of the Centuri separation, and it is anticipated that we will pay a dividend at a level consistent with industry peers.
Liquidity
Several factors (some of which are out of the control of the Company) that could significantly affect liquidity in the future include: variability of natural gas prices, changes in ratemaking policies of regulatory commissions, regulatory lag, customer growth in the natural gas distribution segment, the ability to access and obtain capital from external sources, interest rates, income tax laws and changes thereto, pension funding requirements, inflation, and the level of earnings. Natural gas prices and related gas cost recovery rates, as well as plant investment, have historically had the most significant impact on liquidity.
On an interim basis, Southwest defers over- or under-collections of gas costs to PGA balancing accounts. In addition, Southwest uses this mechanism to either refund amounts over-collected or recoup amounts under-collected as compared to the price paid for natural gas during the period since the last PGA rate change went into effect. At September 30, 2024, the balance in the PGA accounts included an under-collection of approximately $9.3 million pertaining to the California jurisdiction and an over-collection of $189 million pertaining to Arizona and Nevada. The substantial reduction in the PGA balance as of this date compared to balances existing in recently concluded and comparable earlier periods is also highlighted by the substantial cash balance of $402 million existing as of September 30, 2024. See PGA Filings for more information.
Southwest Gas Holdings, Inc. has a credit facility with a borrowing capacity of $300 million that expires in December 2026. This facility is intended for short-term financing needs. At September 30, 2024, $113 million was outstanding under this facility.
As described above, in April 2023, Southwest Gas Holdings, Inc. entered into a $550 million Term Loan Credit Agreement (the “Term Loan”) that was set to mature in October 2024. Southwest Gas Holdings, Inc. utilized a majority of the proceeds to make an equity contribution to Southwest. In August 2024, the Company amended its Term Loan agreement, which extended the maturity date to July 31, 2025 and changed the interest with reference to SOFR from an applicable margin of 1.300% to 1.125%, among other miscellaneous changes.

39


Southwest has a credit facility with a borrowing capacity of $400 million, which was set to expire in April 2025, before it was replaced in August 2024, extending the maturity date to 2029. The operations, designations, and key business terms are comparable to the prior facility. Southwest designates $150 million of capacity under the facility for long-term borrowing needs and the remaining $250 million for working capital purposes. There was no activity on either the long-term or short-term portions of the existing facility during the nine-month period ending September 30, 2024. Additionally, at September 30, 2024, no borrowings were outstanding on either the long-term or short-term portions of the existing facility. The credit facility can be used as necessary to meet liquidity requirements, including temporarily financing under-collected PGA balances, or meeting the refund needs of over-collected balances. The credit facility in place has generally been adequate for Southwest’s working capital needs outside of funds raised through operations and other types of external financing. Any additional cash requirements would include utilization of the credit facility, equity contributions from the Company, and/or other external financing sources.
Southwest has a $50 million commercial paper program. Any issuance under the commercial paper program is supported by Southwest’s revolving credit facility and, therefore, does not represent additional borrowing capacity. Any borrowing under the commercial paper program is designated as long-term debt. Interest rates for the commercial paper program are calculated at the current commercial paper rate during the borrowing term. At September 30, 2024, there were no borrowings outstanding under this program.
Centuri has a $1.545 billion secured revolving credit and term loan multi-currency facility. The capacity of the line of credit is $400 million, with related amounts borrowed and repaid being generally available to be re-borrowed; the term loan facility has a limit of $1.145 billion. The term loan facility expires on August 27, 2028 and the revolving credit facility expires on August 27, 2026. This multi-currency facility allows the borrower to request loan advances in either Canadian or U.S. dollars. The obligations under the credit agreement are secured by present and future ownership interests in substantially all direct and indirect subsidiaries of Centuri, substantially all of the tangible and intangible personal property of each borrower, certain of their direct and indirect subsidiaries, and all products, profits, and proceeds of the foregoing. Centuri assets securing the facility at September 30, 2024 totaled $2.4 billion. The maximum amount outstanding on the combined facility during the first nine months of 2024 was $1.1 billion. As of September 30, 2024, $116 million was outstanding on the revolving credit facility, in addition to $731 million that was outstanding on the term loan portion of the facility. Also at September 30, 2024, there was approximately $218 million, net of letters of credit, available for borrowing under the line of credit.
In April 2024, Centuri successfully completed an IPO of 14,260,000 shares of Centuri common stock at a price of $21.00 per share, in addition to a concurrent private placement of 2,591,929 shares at a price equal to the IPO price. The collective net proceeds to Centuri approximated $328 million. Centuri used $316 million of the proceeds to repay amounts outstanding under its revolving credit and term loan facility, with the remainder intended for general corporate purposes. Following the IPO, the Company owns approximately 81% of the outstanding shares of Centuri common stock. The Company intends to further reduce its ownership in Centuri in future periods through: sales of its remaining Centuri shares into the market, a distribution of Centuri shares to Company stockholders, through an exchange of Centuri shares for Southwest Gas Holdings, Inc. shares, or a combination thereof.
Critical Accounting Policies and Estimates
As of September 30, 2024, there have been no significant changes with regard to the critical accounting policies and estimates disclosed in the MD&A in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2023.
Forward-Looking Statements
This quarterly report contains statements which constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 (“Reform Act”), Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical fact included or incorporated by reference in this quarterly report are forward-looking statements, including, without limitation, statements regarding the Company’s plans, objectives, goals, intentions, projections, strategies, future events or performance, negotiations, and underlying assumptions. The words “may,” “if,” “will,” “should,” “could,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “project,” “continue,” “forecast,” “intend,” “endeavor,” “promote,” “seek,” “pursue,” and similar words and expressions are generally used and intended to identify forward-looking statements. For example, statements regarding plans to refinance near-term debt maturities, those regarding separating from Centuri following the completed IPO, by means of sales into the market, a distribution to Company stockholders, or through an exchange of Centuri shares for Southwest Gas Holdings, Inc. shares, or a combination thereof, and any references as to the timing of any separation of Centuri, those regarding operating margin patterns, customer growth, the composition of our customer base, price volatility, utility optimization initiatives, the level of expense or cost containment, seasonal patterns, the ability to pay debt, the Company’s COLI strategy, the magnitude of future acquisition or divestiture purchase price true-ups or post-closing payments and related impairments or losses related thereto, replacement market and new construction market, impacts from pandemics, including on

40


our employees, customers, business, financial position, earnings, bad debt expense, work deployment and related uncertainties, expected impacts of valuation adjustments associated with any redeemable noncontrolling interests, the profitability of storm work, mix of work, or absorption of fixed costs by larger infrastructure services customers (including Southwest), the impacts of U.S. tax reform including disposition in any regulatory proceeding and bonus depreciation tax deductions, plans and expectations regarding the tax treatment of a separation of Centuri, the impact of any Pipeline and Hazardous Materials Safety Administration rulemaking, the amounts and timing for completion of estimated future construction expenditures, plans to pursue infrastructure programs or programs under SB 151 legislation in Nevada, forecasted operating cash flows and results of operations, net earnings impacts or recovery of costs from gas infrastructure replacement programs and surcharges, funding sources of cash requirements, amounts generally expected to be reflected in future period revenues from regulatory rate proceedings including amounts requested or settled from recent and ongoing general rate cases or other regulatory proceedings, rates and surcharges, PGA administration, recovery and timing, and other rate adjustments, sufficiency of working capital and current credit facilities or the ability to cure negative working capital balances, bank lending practices, the Company’s views regarding its liquidity position, ability to raise funds and receive external financing capacity and the intent and ability to issue various financing instruments and stock under a planned at-the-market equity program or otherwise, future dividends or increases and the Board’s current payout strategy, pension and postretirement benefits, certain impacts of tax acts and provisions, including but not limited to those resulting from Revenue Procedure 2023-15, the effect of any other rate changes or regulatory proceedings, contract or construction change order negotiations, impacts of accounting standard updates, statements regarding future gas prices, gas purchase contracts and pipeline imbalance charges or claims related thereto, recoverability of regulatory assets, the impact of certain legal proceedings or claims, and the timing and results of future rate hearings, including any ongoing or future general rate cases and other proceedings, and statements regarding pending approvals, including proposed regulatory mechanisms, or references to impacts believed to be timing-related, are forward-looking statements. All forward-looking statements are intended to be subject to the safe harbor protection provided by the Reform Act.
A number of important factors affecting the business and financial results of the Company could cause actual results to differ materially from those stated in the forward-looking statements. These factors include, but are not limited to, customer growth rates, conditions in the housing market, inflation, interest rates and related government actions, sufficiency of labor markets and ability to timely hire qualified employees or similar resources, acquisition and divestiture decisions including prices paid or received, adjustments, indemnifications, or commitments related thereto, and their impacts to impairments, write-downs, or losses or expenses generally, the impacts of pandemics including that which may result from a restriction by government officials or otherwise, including impacts on employment in our territories, the health impacts to our customers and employees, the ability to collect on customer accounts due to the earlier suspension or lifted moratorium on late fees or service disconnection or otherwise in any or all jurisdictions, the ability to obtain regulatory recovery of related costs, the ability of the infrastructure services business to conduct work and the impact of a delay or termination of work, and decisions of Centuri customers (including Southwest) as to whether to pursue capital projects due to economic impacts resulting from a pandemic or otherwise, the ability to recover or requirement to return, as applicable, and timing thereof related to costs associated with the PGA mechanisms or other regulatory assets or programs, the effects of regulation/deregulation, governmental or regulatory policy regarding pipeline safety, greenhouse gas emissions, natural gas generally, including potential prohibitions on the use of natural gas by customers or potential customers, including related to electric generation or natural gas appliances, or regarding alternative energy, the regulatory support for ongoing infrastructure programs or expansions, the timing and amount of rate relief, the impact of other regulatory proceedings, the timing and methods determined by regulators to refund amounts to customers resulting from U.S. tax reform, changes in rate design, impacts of other tax regulations, including industry-specific tax regulations, variability in volume of gas or transportation service sold to customers, changes in gas procurement practices, changes in capital requirements and funding, the impact of credit rating actions and conditions in the capital markets on financing costs, changes in construction expenditures and financing, resources/efforts dedicated to construction activities and all other business activities, levels of or changes in operations and maintenance expenses, or other costs, including fuel costs and other costs impacted by inflation or otherwise, benefit plan actuarial estimates, other estimates, and changes thereto, the results of any cost containment efforts, geopolitical influences on the business or its costs, effects of pension or other postretirement benefit expense forecasts or plan modifications, accounting changes and regulatory treatment related thereto, currently unresolved and future liability claims and disputes, changes in pipeline capacity for the transportation of gas and related costs, results of Centuri bid work, the impact of weather, delays, or customer budgetary plans on Centuri’s operations, projections about acquired businesses’ earnings, or those that may be planned, future acquisition-related costs, differences between the actual experience and projections in costs to integrate or stand-up portions of newly acquired business operations, impacts of changes in the value of any redeemable noncontrolling interests if at other than fair value, Centuri utility infrastructure expenses, differences between actual and originally expected outcomes of Centuri bid or other fixed-price construction agreements, outcomes from contract and change order negotiations, ability to successfully procure new work and impacts from work awarded or failing to be awarded from significant customers (collectively, including from Southwest) or related to significant projects, the mix of work awarded, the amount of work awarded to Centuri following the lifting of work stoppages

41


or reduction, the result of productivity inefficiencies from regulatory requirements or efficiencies in performing storm-related or other types of work, the frequency or amount of work associated with storms, customer supply chain challenges, or otherwise, delays or challenges in commissioning individual projects, acquisitions and management’s plans related thereto, the ability of management to successfully finance, close, and assimilate any acquired businesses, the timing and ability of management to successfully consummate the Centuri separation following the completed IPO, the proportional ownership interest in Centuri (and changes thereto) and the related impact on Company earnings, the impact on our stock price or our credit ratings due to undertaking or failing to undertake acquisition or divestiture activities or other strategic endeavors, the impact on our stock price, costs, actions or disruptions or continuation thereof related to significant stockholders and their activism, competition, our ability to raise capital in external financings, our ability to continue to remain within the ratios and other limits subject to our debt covenants, and ongoing evaluations in regard to goodwill, other intangible assets, and utility optimization initiatives. In addition, the Company can provide no assurance that its discussions regarding certain trends or plans relating to its financing and operating expenses will continue, proceed as planned, or cease to continue, or fail to be alleviated, in future periods. For additional information on the risks associated with the Company’s business, see Item 1A. Risk Factors and Item 7A. Quantitative and Qualitative Disclosures About Market Risk in the Annual Report on Form 10-K for the year ended December 31, 2023.
All forward-looking statements in this quarterly report are made as of the date hereof, based on information available to the Company and Southwest as of the date hereof, and the Company and Southwest assume no obligation to update or revise any of its forward-looking statements, even if experience or future changes show that the indicated results or events will not be realized. We caution you not to unduly rely on any forward-looking statement(s).
ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
See Item 7A. Quantitative and Qualitative Disclosures about Market Risk in the 2023 Annual Report on Form 10-K filed with the SEC. No material changes have occurred related to the disclosures about market risk since December 31, 2023.
ITEM 4. CONTROLS AND PROCEDURES
Management of Southwest Gas Holdings, Inc. and Southwest Gas Corporation has established disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) that are designed to provide reasonable assurance that information required to be disclosed in their respective reports filed or submitted under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms and to provide reasonable assurance that such information is accumulated and communicated to management of each company, including each respective Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosures. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and benefits of controls must be considered relative to their costs. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or management override of the control. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and may not be detected.
Based on the most recent evaluation, as of September 30, 2024, management of Southwest Gas Holdings, Inc. and Southwest Gas Corporation, including the Chief Executive Officer and Chief Financial Officer, believes the Company’s and Southwest’s disclosure controls and procedures are effective at attaining the level of reasonable assurance noted above.
There have been no changes in the Company’s or Southwest’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) during the third quarter of 2024 that have materially affected, or are likely to materially affect the Company’s internal control over financial reporting.

42


PART II - OTHER INFORMATION
ITEM 1. LEGAL PROCEEDINGS
The Company and Southwest are named as defendants in various legal proceedings. The ultimate dispositions of these proceedings are not presently determinable; however, it is the opinion of management that none of these legal proceedings individually or in the aggregate will have a material adverse impact on the Company’s or Southwest’s financial position or results of operations.
ITEM 1A. As of September 30, 2024, there have been no material changes to the risk factors previously disclosed in response to “Part I - Item1A. ‘Risk Factors’” in our Annual Report on Form 10-K for the year ended December 31, 2023.
ITEM 2 through 3. None.
ITEM 4. MINE SAFETY DISCLOSURES Not applicable.
ITEM 5. OTHER INFORMATION
During the fiscal quarter ended September 30, 2024, none of our directors or Section 16 officers adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as those terms are defined in Regulation S-K, Item 408.

43


ITEM 6. EXHIBITS
The following documents are filed, or furnished, as applicable, as part of this report on Form 10-Q:
Exhibit 10.1
Exhibit 10.2
Exhibit 10.3
Exhibit 31.01#-
Exhibit 31.02#-
Exhibit 32.01#-
Exhibit 32.02#-
Exhibit 101#-
The following materials from the Quarterly Report on Form 10-Q of Southwest Gas Holdings, Inc. and Southwest Gas Corporation for the quarter ended September 30, 2024, were formatted in Inline XBRL (Extensible Business Reporting Language): (1) Southwest Gas Holdings, Inc. and Subsidiaries Condensed Consolidated Balance Sheets, (ii) Southwest Gas Holdings, Inc. and Subsidiaries Condensed Consolidated Statements of Income, (iii) Southwest Gas Holdings, Inc. and Subsidiaries Condensed Consolidated Statements of Comprehensive Income, (iv) Southwest Gas Holdings, Inc. and Subsidiaries Condensed Consolidated Statements of Cash Flows, (v) Southwest Gas Holdings, Inc. and Subsidiaries Condensed Consolidated Statements of Equity, (vi) Southwest Gas Corporation and Subsidiaries Condensed Consolidated Balance Sheets, (vii) Southwest Gas Corporation and Subsidiaries Condensed Consolidated Statements of Income, (viii) Southwest Gas Corporation and Subsidiaries Condensed Consolidated Statements of Comprehensive Income, (ix) Southwest Gas Corporation and Subsidiaries Condensed Consolidated Statements of Cash Flows, (x) Southwest Gas Corporation and Subsidiaries Condensed Consolidated Statements of Equity. The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
104#Cover Page Interactive Data File (embedded within the Inline XBRL document).
# Filed herewith.

44


SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
Southwest Gas Holdings, Inc.
(Registrant)
Dated: November 6, 2024
/s/ LORI L. COLVIN
Lori L. Colvin
Vice President/Controller and Chief Accounting Officer
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
Southwest Gas Corporation
(Registrant)
Dated: November 6, 2024
/s/ LORI L. COLVIN
Lori L. Colvin
Vice President/Controller and Chief Accounting Officer


45