Western Midstream - 10-Q quarterly report FY

00014239020001414475falsefalse20252025Q3Q3--12-31--12-3131111http://fasb.org/us-gaap/2024#AccruedLiabilitiesCurrent http://fasb.org/us-gaap/2024#OtherLiabilitiesNoncurrenthttp://fasb.org/us-gaap/2024#AccruedLiabilitiesCurrent http://fasb.org/us-gaap/2024#OtherLiabilitiesNoncurrentxbrli:sharesiso4217:USDiso4217:USDxbrli:sharesxbrli:purewes:unitwes:Mileswes:mBblsPerDaywes:Acres00014239022025-01-012025-09-300001423902wes:WesternMidstreamOperatingLPMember2025-01-012025-09-3000014239022025-10-310001423902wes:ServiceFeeBasedMember2025-07-012025-09-300001423902wes:ServiceFeeBasedMember2024-07-012024-09-300001423902wes:ServiceFeeBasedMember2025-01-012025-09-300001423902wes:ServiceFeeBasedMember2024-01-012024-09-300001423902wes:ServiceProductBasedMember2025-07-012025-09-300001423902wes:ServiceProductBasedMember2024-07-012024-09-300001423902wes:ServiceProductBasedMember2025-01-012025-09-300001423902wes:ServiceProductBasedMember2024-01-012024-09-300001423902us-gaap:ProductMember2025-07-012025-09-300001423902us-gaap:ProductMember2024-07-012024-09-300001423902us-gaap:ProductMember2025-01-012025-09-300001423902us-gaap:ProductMember2024-01-012024-09-300001423902us-gaap:ProductAndServiceOtherMember2025-07-012025-09-300001423902us-gaap:ProductAndServiceOtherMember2024-07-012024-09-300001423902us-gaap:ProductAndServiceOtherMember2025-01-012025-09-300001423902us-gaap:ProductAndServiceOtherMember2024-01-012024-09-3000014239022025-07-012025-09-3000014239022024-07-012024-09-3000014239022024-01-012024-09-300001423902srt:AffiliatedEntityMember2025-07-012025-09-300001423902srt:AffiliatedEntityMember2025-01-012025-09-300001423902srt:AffiliatedEntityMember2024-07-012024-09-300001423902srt:AffiliatedEntityMember2024-01-012024-09-3000014239022025-09-3000014239022024-12-310001423902srt:AffiliatedEntityMember2025-09-300001423902srt:AffiliatedEntityMember2024-12-310001423902wes:CommonUnitsMember2024-12-310001423902us-gaap:GeneralPartnerMember2024-12-310001423902us-gaap:NoncontrollingInterestMember2024-12-310001423902wes:CommonUnitsMember2025-01-012025-03-310001423902us-gaap:GeneralPartnerMember2025-01-012025-03-310001423902us-gaap:NoncontrollingInterestMember2025-01-012025-03-3100014239022025-01-012025-03-310001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2025-01-012025-03-310001423902wes:WesternMidstreamOperatingLPMember2025-01-012025-03-310001423902wes:CommonUnitsMember2025-03-310001423902us-gaap:GeneralPartnerMember2025-03-310001423902us-gaap:NoncontrollingInterestMember2025-03-3100014239022025-03-310001423902wes:CommonUnitsMember2025-04-012025-06-300001423902us-gaap:GeneralPartnerMember2025-04-012025-06-300001423902us-gaap:NoncontrollingInterestMember2025-04-012025-06-3000014239022025-04-012025-06-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2025-04-012025-06-300001423902wes:WesternMidstreamOperatingLPMember2025-04-012025-06-300001423902wes:CommonUnitsMember2025-06-300001423902us-gaap:GeneralPartnerMember2025-06-300001423902us-gaap:NoncontrollingInterestMember2025-06-3000014239022025-06-300001423902wes:CommonUnitsMember2025-07-012025-09-300001423902us-gaap:GeneralPartnerMember2025-07-012025-09-300001423902us-gaap:NoncontrollingInterestMember2025-07-012025-09-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2025-07-012025-09-300001423902wes:WesternMidstreamOperatingLPMember2025-07-012025-09-300001423902wes:CommonUnitsMember2025-09-300001423902us-gaap:GeneralPartnerMember2025-09-300001423902us-gaap:NoncontrollingInterestMember2025-09-300001423902wes:CommonUnitsMember2023-12-310001423902us-gaap:GeneralPartnerMember2023-12-310001423902us-gaap:NoncontrollingInterestMember2023-12-3100014239022023-12-310001423902wes:CommonUnitsMember2024-01-012024-03-310001423902us-gaap:GeneralPartnerMember2024-01-012024-03-310001423902us-gaap:NoncontrollingInterestMember2024-01-012024-03-3100014239022024-01-012024-03-310001423902us-gaap:NoncontrollingInterestMemberwes:ChipetaProcessingLimitedLiabilityCompanyMember2024-01-012024-03-310001423902wes:ChipetaProcessingLimitedLiabilityCompanyMember2024-01-012024-03-310001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2024-01-012024-03-310001423902wes:WesternMidstreamOperatingLPMember2024-01-012024-03-310001423902wes:CommonUnitsMember2024-03-310001423902us-gaap:GeneralPartnerMember2024-03-310001423902us-gaap:NoncontrollingInterestMember2024-03-3100014239022024-03-310001423902wes:CommonUnitsMember2024-04-012024-06-300001423902us-gaap:GeneralPartnerMember2024-04-012024-06-300001423902us-gaap:NoncontrollingInterestMember2024-04-012024-06-3000014239022024-04-012024-06-300001423902us-gaap:NoncontrollingInterestMemberwes:ChipetaProcessingLimitedLiabilityCompanyMember2024-04-012024-06-300001423902wes:ChipetaProcessingLimitedLiabilityCompanyMember2024-04-012024-06-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2024-04-012024-06-300001423902wes:WesternMidstreamOperatingLPMember2024-04-012024-06-300001423902wes:CommonUnitsMember2024-06-300001423902us-gaap:GeneralPartnerMember2024-06-300001423902us-gaap:NoncontrollingInterestMember2024-06-3000014239022024-06-300001423902wes:CommonUnitsMember2024-07-012024-09-300001423902us-gaap:GeneralPartnerMember2024-07-012024-09-300001423902us-gaap:NoncontrollingInterestMember2024-07-012024-09-300001423902us-gaap:NoncontrollingInterestMemberwes:ChipetaProcessingLimitedLiabilityCompanyMember2024-07-012024-09-300001423902wes:ChipetaProcessingLimitedLiabilityCompanyMember2024-07-012024-09-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2024-07-012024-09-300001423902wes:WesternMidstreamOperatingLPMember2024-07-012024-09-300001423902wes:CommonUnitsMember2024-09-300001423902us-gaap:GeneralPartnerMember2024-09-300001423902us-gaap:NoncontrollingInterestMember2024-09-3000014239022024-09-300001423902wes:ThirdPartiesMember2025-01-012025-09-300001423902wes:ThirdPartiesMember2024-01-012024-09-300001423902wes:ChipetaProcessingLimitedLiabilityCompanyMember2025-01-012025-09-300001423902wes:ChipetaProcessingLimitedLiabilityCompanyMember2024-01-012024-09-300001423902wes:WesternMidstreamOperatingLPMember2025-01-012025-09-300001423902wes:WesternMidstreamOperatingLPMember2024-01-012024-09-300001423902wes:WesternMidstreamOperatingLPMemberwes:ServiceFeeBasedMember2025-07-012025-09-300001423902wes:WesternMidstreamOperatingLPMemberwes:ServiceFeeBasedMember2024-07-012024-09-300001423902wes:WesternMidstreamOperatingLPMemberwes:ServiceFeeBasedMember2025-01-012025-09-300001423902wes:WesternMidstreamOperatingLPMemberwes:ServiceFeeBasedMember2024-01-012024-09-300001423902wes:WesternMidstreamOperatingLPMemberwes:ServiceProductBasedMember2025-07-012025-09-300001423902wes:WesternMidstreamOperatingLPMemberwes:ServiceProductBasedMember2024-07-012024-09-300001423902wes:WesternMidstreamOperatingLPMemberwes:ServiceProductBasedMember2025-01-012025-09-300001423902wes:WesternMidstreamOperatingLPMemberwes:ServiceProductBasedMember2024-01-012024-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:ProductMember2025-07-012025-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:ProductMember2024-07-012024-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:ProductMember2025-01-012025-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:ProductMember2024-01-012024-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:ProductAndServiceOtherMember2025-07-012025-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:ProductAndServiceOtherMember2024-07-012024-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:ProductAndServiceOtherMember2025-01-012025-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:ProductAndServiceOtherMember2024-01-012024-09-300001423902wes:WesternMidstreamOperatingLPMember2025-07-012025-09-300001423902wes:WesternMidstreamOperatingLPMember2024-07-012024-09-300001423902wes:WesternMidstreamOperatingLPMember2024-01-012024-09-300001423902srt:AffiliatedEntityMemberwes:WesternMidstreamOperatingLPMember2025-07-012025-09-300001423902srt:AffiliatedEntityMemberwes:WesternMidstreamOperatingLPMember2025-01-012025-09-300001423902srt:AffiliatedEntityMemberwes:WesternMidstreamOperatingLPMember2024-07-012024-09-300001423902srt:AffiliatedEntityMemberwes:WesternMidstreamOperatingLPMember2024-01-012024-09-300001423902wes:WesternMidstreamOperatingLPMember2025-09-300001423902wes:WesternMidstreamOperatingLPMember2024-12-310001423902srt:AffiliatedEntityMemberwes:WesternMidstreamOperatingLPMember2025-09-300001423902srt:AffiliatedEntityMemberwes:WesternMidstreamOperatingLPMember2024-12-310001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2024-12-310001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2024-12-310001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2025-01-012025-03-310001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2025-01-012025-03-310001423902wes:WesternMidstreamOperatingLPMember2025-01-012025-03-310001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMemberwes:WesternMidstreamPartnersLPMember2025-01-012025-03-310001423902wes:WesternMidstreamPartnersLPMemberwes:WesternMidstreamOperatingLPMember2025-01-012025-03-310001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2025-03-310001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2025-03-310001423902wes:WesternMidstreamOperatingLPMember2025-03-310001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2025-04-012025-06-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2025-04-012025-06-300001423902wes:WesternMidstreamOperatingLPMember2025-04-012025-06-300001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMemberwes:WesternMidstreamPartnersLPMember2025-04-012025-06-300001423902wes:WesternMidstreamPartnersLPMemberwes:WesternMidstreamOperatingLPMember2025-04-012025-06-300001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2025-06-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2025-06-300001423902wes:WesternMidstreamOperatingLPMember2025-06-300001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2025-07-012025-09-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2025-07-012025-09-300001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMemberwes:WesternMidstreamPartnersLPMember2025-07-012025-09-300001423902wes:WesternMidstreamPartnersLPMemberwes:WesternMidstreamOperatingLPMember2025-07-012025-09-300001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2025-09-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2025-09-300001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2023-12-310001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2023-12-310001423902wes:WesternMidstreamOperatingLPMember2023-12-310001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2024-01-012024-03-310001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2024-01-012024-03-310001423902wes:WesternMidstreamOperatingLPMember2024-01-012024-03-310001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMemberwes:ChipetaProcessingLimitedLiabilityCompanyMember2024-01-012024-03-310001423902wes:ChipetaProcessingLimitedLiabilityCompanyMemberwes:WesternMidstreamOperatingLPMember2024-01-012024-03-310001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMemberwes:WesternMidstreamPartnersLPMember2024-01-012024-03-310001423902wes:WesternMidstreamPartnersLPMemberwes:WesternMidstreamOperatingLPMember2024-01-012024-03-310001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2024-03-310001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2024-03-310001423902wes:WesternMidstreamOperatingLPMember2024-03-310001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2024-04-012024-06-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2024-04-012024-06-300001423902wes:WesternMidstreamOperatingLPMember2024-04-012024-06-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMemberwes:ChipetaProcessingLimitedLiabilityCompanyMember2024-04-012024-06-300001423902wes:ChipetaProcessingLimitedLiabilityCompanyMemberwes:WesternMidstreamOperatingLPMember2024-04-012024-06-300001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMemberwes:WesternMidstreamPartnersLPMember2024-04-012024-06-300001423902wes:WesternMidstreamPartnersLPMemberwes:WesternMidstreamOperatingLPMember2024-04-012024-06-300001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2024-06-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2024-06-300001423902wes:WesternMidstreamOperatingLPMember2024-06-300001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2024-07-012024-09-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2024-07-012024-09-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMemberwes:ChipetaProcessingLimitedLiabilityCompanyMember2024-07-012024-09-300001423902wes:ChipetaProcessingLimitedLiabilityCompanyMemberwes:WesternMidstreamOperatingLPMember2024-07-012024-09-300001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMemberwes:WesternMidstreamPartnersLPMember2024-07-012024-09-300001423902wes:WesternMidstreamPartnersLPMemberwes:WesternMidstreamOperatingLPMember2024-07-012024-09-300001423902wes:CommonUnitsMemberwes:WesternMidstreamOperatingLPMember2024-09-300001423902us-gaap:NoncontrollingInterestMemberwes:WesternMidstreamOperatingLPMember2024-09-300001423902wes:WesternMidstreamOperatingLPMember2024-09-300001423902wes:ThirdPartiesMemberwes:WesternMidstreamOperatingLPMember2025-01-012025-09-300001423902wes:ThirdPartiesMemberwes:WesternMidstreamOperatingLPMember2024-01-012024-09-300001423902wes:ChipetaProcessingLimitedLiabilityCompanyMemberwes:WesternMidstreamOperatingLPMember2025-01-012025-09-300001423902wes:ChipetaProcessingLimitedLiabilityCompanyMemberwes:WesternMidstreamOperatingLPMember2024-01-012024-09-300001423902wes:WesternMidstreamOperatingLPMemberwes:WesternMidstreamPartnersLPMember2025-01-012025-09-300001423902wes:WesternMidstreamOperatingLPMemberwes:OccidentalMember2025-01-012025-09-300001423902wes:OperatedMemberwes:NaturalGasGatheringSystemMember2025-09-300001423902wes:OperatedInterestMemberwes:NaturalGasGatheringSystemMember2025-09-300001423902us-gaap:EquityMethodInvesteeMemberwes:NaturalGasGatheringSystemMember2025-09-300001423902wes:OperatedMemberwes:NaturalGasTreatingFacilitiesMember2025-09-300001423902wes:OperatedInterestMemberwes:NaturalGasTreatingFacilitiesMember2025-09-300001423902wes:OperatedMemberus-gaap:NaturalGasProcessingPlantMember2025-09-300001423902wes:OperatedInterestMemberus-gaap:NaturalGasProcessingPlantMember2025-09-300001423902us-gaap:EquityMethodInvesteeMemberus-gaap:NaturalGasProcessingPlantMember2025-09-300001423902wes:OperatedMemberwes:NaturalGasLiquidsPipelineMember2025-09-300001423902us-gaap:EquityMethodInvesteeMemberwes:NaturalGasLiquidsPipelineMember2025-09-300001423902wes:OperatedMembernaics:ZZ4862102025-09-300001423902us-gaap:EquityMethodInvesteeMembernaics:ZZ4862102025-09-300001423902wes:OperatedMembernaics:ZZ4861102025-09-300001423902wes:OperatedInterestMembernaics:ZZ4861102025-09-300001423902us-gaap:EquityMethodInvesteeMembernaics:ZZ4861102025-09-300001423902wes:ChipetaProcessingLimitedLiabilityCompanyMember2025-09-300001423902wes:WesternMidstreamOperatingLPMember2025-09-300001423902srt:NaturalGasLiquidsReservesMember2025-09-300001423902srt:NaturalGasLiquidsReservesMember2024-12-310001423902wes:LongTermIncentivePlansMember2025-01-012025-09-300001423902wes:LongTermIncentivePlansMember2024-01-012024-09-300001423902wes:LongTermIncentivePlansMember2025-07-012025-09-300001423902wes:LongTermIncentivePlansMember2024-07-012024-09-300001423902wes:CustomersMember2025-09-300001423902wes:CustomersMember2024-12-3100014239022025-10-012025-09-3000014239022026-01-012025-09-3000014239022027-01-012025-09-3000014239022028-01-012025-09-3000014239022029-01-012025-09-3000014239022030-01-012025-09-300001423902wes:MarcellusInterestMemberwes:ProportionateConsolidationMember2024-04-012024-06-300001423902wes:MontBelvieuJointVentureMemberus-gaap:EquityMethodInvesteeMember2024-03-310001423902wes:WhitethornPipelineCompanyLimitedLiabilityCompanyMemberus-gaap:EquityMethodInvesteeMember2024-03-310001423902wes:PanolaPipelineCompanyLimitedLiabilityCompanyMemberus-gaap:EquityMethodInvesteeMember2024-03-310001423902wes:SaddlehornPipelineCompanyLimitedLiabilityCompanyMemberus-gaap:EquityMethodInvesteeMember2024-03-310001423902us-gaap:EquityMethodInvesteeMember2024-01-012024-03-310001423902wes:WesternMidstreamPartnersLPMember2025-01-012025-09-3000014239022024-10-012024-12-310001423902wes:WesternMidstreamOperatingLPMember2024-10-012024-12-310001423902wes:WesternMidstreamPartnersLPMemberwes:OccidentalMember2025-09-300001423902wes:WesternMidstreamPartnersLPMemberwes:OccidentalMember2025-01-012025-09-300001423902wes:WesternMidstreamPartnersLPMemberwes:PublicMember2025-09-300001423902wes:WesternMidstreamPartnersLPMemberwes:PublicMember2025-01-012025-09-3000014239022025-02-200001423902wes:PublicMember2025-01-012025-09-300001423902srt:AffiliatedEntityMemberwes:ServiceFeeBasedMember2025-07-012025-09-300001423902srt:AffiliatedEntityMemberwes:ServiceFeeBasedMember2024-07-012024-09-300001423902srt:AffiliatedEntityMemberwes:ServiceFeeBasedMember2025-01-012025-09-300001423902srt:AffiliatedEntityMemberwes:ServiceFeeBasedMember2024-01-012024-09-300001423902srt:AffiliatedEntityMemberwes:ServiceProductBasedMember2025-07-012025-09-300001423902srt:AffiliatedEntityMemberwes:ServiceProductBasedMember2024-07-012024-09-300001423902srt:AffiliatedEntityMemberwes:ServiceProductBasedMember2025-01-012025-09-300001423902srt:AffiliatedEntityMemberwes:ServiceProductBasedMember2024-01-012024-09-300001423902srt:AffiliatedEntityMemberus-gaap:ProductMember2025-07-012025-09-300001423902srt:AffiliatedEntityMemberus-gaap:ProductMember2024-07-012024-09-300001423902srt:AffiliatedEntityMemberus-gaap:ProductMember2025-01-012025-09-300001423902srt:AffiliatedEntityMemberus-gaap:ProductMember2024-01-012024-09-300001423902wes:WesternMidstreamOperatingLPMembersrt:AffiliatedEntityMember2025-01-012025-09-300001423902wes:WesternMidstreamOperatingLPMembersrt:AffiliatedEntityMember2024-01-012024-09-300001423902wes:NaturalGasMember2025-07-012025-09-300001423902wes:NaturalGasMember2025-01-012025-09-300001423902wes:NaturalGasMember2024-07-012024-09-300001423902wes:NaturalGasMember2024-01-012024-09-300001423902wes:CrudeOilandNGLsMember2025-07-012025-09-300001423902wes:CrudeOilandNGLsMember2025-01-012025-09-300001423902wes:CrudeOilandNGLsMember2024-07-012024-09-300001423902wes:CrudeOilandNGLsMember2024-01-012024-09-300001423902us-gaap:PublicUtilitiesInventoryWaterMember2025-07-012025-09-300001423902us-gaap:PublicUtilitiesInventoryWaterMember2025-01-012025-09-300001423902us-gaap:PublicUtilitiesInventoryWaterMember2024-07-012024-09-300001423902us-gaap:PublicUtilitiesInventoryWaterMember2024-01-012024-09-300001423902srt:AffiliatedEntityMember2021-01-012021-03-310001423902wes:MiVidaJointVentureLimitedLiabilityCompanyMemberus-gaap:EquityMethodInvesteeMember2025-09-300001423902wes:MiVidaJointVentureLimitedLiabilityCompanyMember2024-12-310001423902wes:MiVidaJointVentureLimitedLiabilityCompanyMember2025-01-012025-09-300001423902wes:MiVidaJointVentureLimitedLiabilityCompanyMember2025-09-300001423902wes:FrontRangePipelineLLCMemberus-gaap:EquityMethodInvesteeMember2025-09-300001423902wes:FrontRangePipelineLLCMember2024-12-310001423902wes:FrontRangePipelineLLCMember2025-01-012025-09-300001423902wes:FrontRangePipelineLLCMember2025-09-300001423902wes:RedBluffExpressPipelineLimitedLiabilityCompanyMemberus-gaap:EquityMethodInvesteeMember2025-09-300001423902wes:RedBluffExpressPipelineLimitedLiabilityCompanyMember2024-12-310001423902wes:RedBluffExpressPipelineLimitedLiabilityCompanyMember2025-01-012025-09-300001423902wes:RedBluffExpressPipelineLimitedLiabilityCompanyMember2025-09-300001423902wes:RendezvousMemberus-gaap:EquityMethodInvesteeMember2025-09-300001423902wes:RendezvousMember2024-12-310001423902wes:RendezvousMember2025-01-012025-09-300001423902wes:RendezvousMember2025-09-300001423902wes:TexasExpressPipelineLLCMemberus-gaap:EquityMethodInvesteeMember2025-09-300001423902wes:TexasExpressPipelineLLCMember2024-12-310001423902wes:TexasExpressPipelineLLCMember2025-01-012025-09-300001423902wes:TexasExpressPipelineLLCMember2025-09-300001423902wes:TexasExpressGatheringLLCMemberus-gaap:EquityMethodInvesteeMember2025-09-300001423902wes:TexasExpressGatheringLLCMember2024-12-310001423902wes:TexasExpressGatheringLLCMember2025-01-012025-09-300001423902wes:TexasExpressGatheringLLCMember2025-09-300001423902wes:WhiteCliffsMemberus-gaap:EquityMethodInvesteeMember2025-09-300001423902wes:WhiteCliffsMember2024-12-310001423902wes:WhiteCliffsMember2025-01-012025-09-300001423902wes:WhiteCliffsMember2025-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2025-09-300001423902us-gaap:FairValueInputsLevel2Memberwes:WesternMidstreamOperatingLPMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:SeniorNotesMember2025-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2024-12-310001423902us-gaap:FairValueInputsLevel2Memberwes:WesternMidstreamOperatingLPMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:SeniorNotesMember2024-12-310001423902wes:FinanceLeaseLiabilityShortTermMemberwes:WesternMidstreamOperatingLPMember2025-09-300001423902us-gaap:FairValueInputsLevel2Memberwes:FinanceLeaseLiabilityShortTermMemberwes:WesternMidstreamOperatingLPMemberus-gaap:MarketApproachValuationTechniqueMember2025-09-300001423902wes:FinanceLeaseLiabilityShortTermMemberwes:WesternMidstreamOperatingLPMember2024-12-310001423902us-gaap:FairValueInputsLevel2Memberwes:FinanceLeaseLiabilityShortTermMemberwes:WesternMidstreamOperatingLPMemberus-gaap:MarketApproachValuationTechniqueMember2024-12-310001423902us-gaap:FairValueInputsLevel2Memberus-gaap:MarketApproachValuationTechniqueMember2025-09-300001423902us-gaap:FairValueInputsLevel2Memberus-gaap:MarketApproachValuationTechniqueMember2024-12-310001423902wes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2025-09-300001423902us-gaap:FairValueInputsLevel2Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMemberus-gaap:MarketApproachValuationTechniqueMember2025-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2024-12-310001423902us-gaap:FairValueInputsLevel2Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMemberus-gaap:MarketApproachValuationTechniqueMember2024-12-310001423902wes:FinanceLeaseLiabilityLongTermMemberwes:WesternMidstreamOperatingLPMember2025-09-300001423902us-gaap:FairValueInputsLevel2Memberwes:FinanceLeaseLiabilityLongTermMemberwes:WesternMidstreamOperatingLPMemberus-gaap:MarketApproachValuationTechniqueMember2025-09-300001423902wes:FinanceLeaseLiabilityLongTermMemberwes:WesternMidstreamOperatingLPMember2024-12-310001423902us-gaap:FairValueInputsLevel2Memberwes:FinanceLeaseLiabilityLongTermMemberwes:WesternMidstreamOperatingLPMemberus-gaap:MarketApproachValuationTechniqueMember2024-12-310001423902wes:LongTermDebtObligationsMember2025-09-300001423902us-gaap:FairValueInputsLevel2Memberwes:LongTermDebtObligationsMemberus-gaap:MarketApproachValuationTechniqueMember2025-09-300001423902wes:LongTermDebtObligationsMember2024-12-310001423902us-gaap:FairValueInputsLevel2Memberwes:LongTermDebtObligationsMemberus-gaap:MarketApproachValuationTechniqueMember2024-12-310001423902wes:SeniorNotes3Point100PercentDue2025Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2025-09-300001423902wes:SeniorNotes3Point100PercentDue2025Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2025-01-012025-09-300001423902wes:SeniorNotes3Point950PercentDue2025Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2025-09-300001423902wes:SeniorNotes3Point950PercentDue2025Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2025-01-012025-09-300001423902wes:FinanceLeaseLiabilityMemberwes:WesternMidstreamOperatingLPMember2025-01-012025-09-300001423902wes:SeniorNotes4Point50PercentDue2030Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2025-09-300001423902wes:SeniorNotes5Point250PercentDue2050Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2025-09-300001423902wes:SeniorNotes4Point50PercentDue2030Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2024-09-300001423902wes:SeniorNotes5Point250PercentDue2050Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2024-09-300001423902wes:SeniorNotes4Point650PercentDue2026Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2025-09-300001423902wes:SeniorNotes5Point450PercentDue2034Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2024-12-310001423902wes:SeniorNotes5Point450PercentDue2034Memberwes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2025-09-300001423902wes:WesternMidstreamOperatingLPMemberus-gaap:SeniorNotesMember2024-01-012024-12-310001423902wes:SeniorRevolvingCreditFacility1Memberwes:WesternMidstreamOperatingLPMemberus-gaap:RevolvingCreditFacilityMemberwes:NonExtendingLenderMember2025-09-300001423902wes:SeniorRevolvingCreditFacility1Memberwes:WesternMidstreamOperatingLPMemberus-gaap:RevolvingCreditFacilityMember2025-09-300001423902wes:SeniorRevolvingCreditFacility1Memberwes:WesternMidstreamOperatingLPMemberus-gaap:RevolvingCreditFacilityMember2024-09-300001423902wes:SeniorRevolvingCreditFacility1Memberwes:WesternMidstreamOperatingLPMemberus-gaap:RevolvingCreditFacilityMember2025-01-012025-09-300001423902wes:SeniorRevolvingCreditFacility1Memberwes:WesternMidstreamOperatingLPMemberus-gaap:RevolvingCreditFacilityMember2024-01-012024-09-300001423902wes:CommercialPaperProgram1Memberwes:WesternMidstreamOperatingLPMemberus-gaap:CommercialPaperMember2025-09-300001423902wes:CommercialPaperProgram1Memberwes:WesternMidstreamOperatingLPMembersrt:MaximumMemberus-gaap:CommercialPaperMember2025-01-012025-09-300001423902wes:ArisWaterSolutionsInc.Memberus-gaap:SubsequentEventMember2025-10-152025-10-150001423902wes:ArisWaterSolutionsInc.Memberus-gaap:SubsequentEventMember2025-10-15

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)


☒			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2025


☐			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to


WESTERN MIDSTREAM PARTNERS, LP
WESTERN MIDSTREAM OPERATING, LP
(Exact name of registrant as specified in its charter)


	Commission file number:	State or other jurisdiction of incorporation or organization:	I.R.S. Employer Identification No.:
Western Midstream Partners, LP	001-35753	Delaware	46-0967367
Western Midstream Operating, LP	001-34046	Delaware	26-1075808

Address of principal executive offices:

Zip Code:

Registrant’s telephone number, including area code:

Western Midstream Partners, LP

9950 Woodloch Forest Drive, Suite 2800

The Woodlands,

Texas

77380

(346)

786-5000

Western Midstream Operating, LP

9950 Woodloch Forest Drive, Suite 2800

The Woodlands,

Texas

77380

(346)

786-5000

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading symbol

Name of exchange
on which registered

Common units outstanding as of October 31, 2025:

Western Midstream Partners, LP

Common units

WES

New York Stock Exchange

407,995,725

Western Midstream Operating, LP

None

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Western Midstream Partners, LP

Yes

Western Midstream Operating, LP

Yes

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Western Midstream Partners, LP

Yes

Western Midstream Operating, LP

Yes

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Western Midstream Partners, LP

Large Accelerated Filer

Accelerated Filer

Non-accelerated Filer

Smaller Reporting Company

Emerging Growth Company

☐

Western Midstream Operating, LP

Large Accelerated Filer

Accelerated Filer

Non-accelerated Filer

Smaller Reporting Company

Emerging Growth Company

☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.


Western Midstream Partners, LP			¨
Western Midstream Operating, LP			¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Western Midstream Partners, LP

Yes

☐

Western Midstream Operating, LP

Yes

☐

FILING FORMAT

This quarterly report on Form 10-Q is a combined report being filed by two separate registrants: Western Midstream Partners, LP and Western Midstream Operating, LP. Western Midstream Operating, LP is a consolidated subsidiary of Western Midstream Partners, LP that has publicly traded debt, but does not have any publicly traded equity securities. Information contained herein related to any individual registrant is filed by such registrant solely on its own behalf. Each registrant makes no representation as to information relating exclusively to the other registrant.

Part I, Item 1 of this quarterly report includes separate financial statements (i.e., consolidated statements of operations, consolidated balance sheets, consolidated statements of equity and partners’ capital, and consolidated statements of cash flows) for Western Midstream Partners, LP and Western Midstream Operating, LP. The accompanying Notes to Consolidated Financial Statements, which are included under Part I, Item 1 of this quarterly report, and Management’s Discussion and Analysis of Financial Condition and Results of Operations, which is included under Part I, Item 2 of this quarterly report, are presented on a combined basis for each registrant, with any material differences between the registrants disclosed separately.


TABLE OF CONTENTS
		PAGE
PART I		FINANCIAL INFORMATION (UNAUDITED)
	Item 1.	Financial Statements
		Western Midstream Partners, LP
		Consolidated Statements of Operations for the three and nine months ended September 30, 2025 and 2024	6
		Consolidated Balance Sheets as of September 30, 2025, and December 31, 2024	7
		Consolidated Statements of Equity and Partners’ Capital for the three and nine months ended September 30, 2025 and 2024	8
		Consolidated Statements of Cash Flows for the nine months ended September 30, 2025 and 2024	10
		Western Midstream Operating, LP
		Consolidated Statements of Operations for the three and nine months ended September 30, 2025 and 2024	11
		Consolidated Balance Sheets as of September 30, 2025, and December 31, 2024	12
		Consolidated Statements of Equity and Partners’ Capital for the three and nine months ended September 30, 2025 and 2024	13
		Consolidated Statements of Cash Flows for the nine months ended September 30, 2025 and 2024	14
		Notes to Consolidated Financial Statements	15
		Note 1. Description of Business and Basis of Presentation	15
		Note 2. Revenue from Contracts with Customers	17
		Note 3. Acquisitions and Divestitures	19
		Note 4. Partnership Distributions	20
		Note 5. Equity and Partners’ Capital	21
		Note 6. Related-Party Transactions	22
		Note 7. Equity Investments	25

		Note 8. Selected Components of Working Capital	26
		Note 9. Debt	27
		Note 10. Commitments and Contingencies	28
		Note 11. Reportable Segment	29
		Note 12. Subsequent Event	30
	Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	31
		Cautionary Note Regarding Forward-Looking Statements	31
		Executive Summary	33
		Outlook	35
		Acquisitions and Divestitures	36

		Results of Operations	36
		Operating Results	36
		Reconciliation of Non-GAAP Financial Measures	42
		Key Performance Metrics	47
		Liquidity and Capital Resources	48
		Items Affecting the Comparability of Financial Results with WES Operating	51
		Critical Accounting Estimates	52
		Recent Accounting Developments	52
	Item 3.	Quantitative and Qualitative Disclosures About Market Risk	53
	Item 4.	Controls and Procedures	53
PART II		OTHER INFORMATION
	Item 1.	Legal Proceedings	54
	Item 1A.	Risk Factors	54
	Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	55
	Item 5.	Other Information	55
	Item 6.	Exhibits	56

COMMONLY USED ABBREVIATIONS AND TERMS

References to “we,” “us,” “our,” “WES,” “the Partnership,” or “Western Midstream Partners, LP” refer to Western Midstream Partners, LP (formerly Western Gas Equity Partners, LP) and its subsidiaries. The following list of abbreviations and terms are used in this document:


			Defined Term						Definition
			Aris						Aris Water Solutions, Inc., which was acquired by the Partnership on October 15, 2025.
			Barrel, Bbl, Bbls/d, MBbls/d						42 U.S. gallons measured at 60 degrees Fahrenheit, barrels per day, thousand barrels per day.

			Board						The board of directors of WES’s general partner.

			Chipeta						Chipeta Processing, LLC, in which we are the managing member and own a 75% interest.

			Condensate						A natural-gas liquid with a low vapor pressure compared to drip condensate, mainly composed of propane, butane, pentane, and heavier hydrocarbon fractions.
			DBM water systems						Produced-water gathering and disposal systems in West Texas.

			DJ Basin complex						The Platte Valley, Fort Lupton, Wattenberg, Lancaster, and Latham processing plants, and the Wattenberg gathering system.
			EBITDA						Earnings before interest, taxes, depreciation, and amortization. For a definition of “Adjusted EBITDA,” see Reconciliation of Non-GAAP Financial Measures under Part I, Item 2 of this Form 10-Q.

			Exchange Act						The Securities Exchange Act of 1934, as amended.


			FRP						Front Range Pipeline LLC, in which we own a 33.33% interest.
			GAAP						Generally accepted accounting principles in the United States.
			General partner						Western Midstream Holdings, LLC, the general partner of the Partnership.
			Imbalance						Imbalances result from (i) differences between gas and NGLs volumes nominated by customers and gas and NGLs volumes received from those customers and (ii) differences between gas and NGLs volumes received from customers and gas and NGLs volumes delivered to those customers.
			Marcellus Interest						The 33.75% interest in the Larry’s Creek, Seely, and Warrensville gas-gathering systems and related facilities located in northern Pennsylvania that we sold in April 2024 (see Note 3—Acquisitions and Divestitures in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q).
			Mcf, MMcf, MMcf/d						Thousand cubic feet, million cubic feet, million cubic feet per day.
			Meritage						Meritage Midstream Services II, LLC, which was acquired by the Partnership on October 13, 2023.

			Mi Vida						Mi Vida JV LLC, in which we own a 50% interest.
			MLP						Master limited partnership.
			MMBtu						Million British thermal units.
			Mont Belvieu JV						Enterprise EF78 LLC, in which we owned a 25% interest that we sold in February 2024 (see Note 3—Acquisitions and Divestitures in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q).
			Natural-gas liquid(s) or NGL(s)						The combination of ethane, propane, normal butane, isobutane, and natural gasolines that, when removed from natural gas, become liquid under various levels of pressure and temperature.

			Occidental						Occidental Petroleum Corporation and, as the context requires, its subsidiaries, excluding our general partner.


			Panola						Panola Pipeline Company, LLC, in which we owned a 15% interest that we sold in March 2024 (see Note 3—Acquisitions and Divestitures in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q).
			Powder River Basin complex						The Hilight system and assets acquired from Meritage, which includes a gathering system, processing plants, and the Thunder Creek NGL pipeline.
			Produced water						Byproduct associated with the production of crude oil and natural gas that often contains a number of dissolved solids and other materials found in oil and gas reservoirs.

			RCF						WES Operating’s $2.0 billion senior unsecured revolving credit facility.
			Red Bluff Express						Red Bluff Express Pipeline, LLC, in which we own a 30% interest.


			Defined Term						Definition
			Related parties						Occidental, the Partnership’s equity interests (see Note 7—Equity Investments in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q), and the Partnership and WES Operating for transactions that eliminate upon consolidation.
			Rendezvous						Rendezvous Gas Services, LLC, in which we own a 22% interest.
			Residue						The natural gas remaining after the unprocessed natural-gas stream has been processed or treated.
			Saddlehorn						Saddlehorn Pipeline Company, LLC, in which we owned a 20% interest that we sold in March 2024 (see Note 3—Acquisitions and Divestitures in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q).
			SEC						U.S. Securities and Exchange Commission.
			Services Agreement						That certain amended and restated Services, Secondment, and Employee Transfer Agreement, dated as of December 31, 2019, between WES Operating GP and Occidental.
			Skim oil						A crude-oil byproduct that is recovered during the produced-water gathering and disposal process.
			Springfield system						The Springfield gas-gathering system and Springfield oil-gathering system.


			TEG						Texas Express Gathering LLC, in which we own a 20% interest.
			TEP						Texas Express Pipeline LLC, in which we own a 20% interest.
			WES Operating						Western Midstream Operating, LP, formerly known as Western Gas Partners, LP, and its subsidiaries.
			WES Operating GP						Western Midstream Operating GP, LLC, the general partner of WES Operating.
			West Texas complex						The Delaware Basin Midstream complex and DBJV and Haley systems.
			WGRAH						WGR Asset Holding Company LLC, a subsidiary of Occidental.
			White Cliffs						White Cliffs Pipeline, LLC, in which we own a 10% interest.
			Whitethorn LLC						Whitethorn Pipeline Company LLC, in which we owned a 20% interest that we sold in February 2024 (see Note 3—Acquisitions and Divestitures in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q).
			Whitethorn						A crude-oil and condensate pipeline, and related storage facilities, owned by Whitethorn LLC.
			2025 Purchase Program						The $250.0 million buyback program ending December 31, 2026. The common units may be purchased from time to time in the open market at prevailing market prices or in privately negotiated transactions.

Table of Contents

PART I. FINANCIAL INFORMATION (UNAUDITED)

Item 1. Financial Statements

WESTERN MIDSTREAM PARTNERS, LP

CONSOLIDATED STATEMENTS OF OPERATIONS

(UNAUDITED)




	Three Months Ended September 30,				Nine Months Ended September 30,
thousands except per-unit amounts	2025		2024		2025		2024
Revenues and other
Service revenues – fee based	$	868,253	$	814,319	$	2,542,869	$	2,389,366
Service revenues – product based	33,919		49,115		143,613		177,321
Product sales	50,129		19,673		124,878		109,076
Other	183		255		562		957
Total revenues and other (1)	952,484		883,362		2,811,922		2,676,720
Equity income, net – related parties	16,847		23,977		64,410		84,227
Operating expenses
Cost of product	51,187		32,847		135,360		132,936
Operation and maintenance	212,385		231,066		663,528		649,324
General and administrative	64,119		64,726		197,051		195,498
Property and other taxes	15,725		12,635		51,356		43,984
Depreciation and amortization	170,323		166,015		512,896		487,438
Long-lived asset and other impairments	11,562		4,651		12,251		6,204

Total operating expenses (2)	525,301		511,940		1,572,442		1,515,384
Gain (loss) on divestiture and other, net	(2,470)		467		(8,048)		299,426
Operating income (loss)	441,560		395,866		1,295,842		1,544,989
Interest expense	(92,353)		(94,149)		(284,816)		(279,177)
Gain (loss) on early extinguishment of debt	—		—		—		5,403
Other income (expense), net	1,754		9,565		12,923		16,124
Income (loss) before income taxes	350,961		311,282		1,023,949		1,287,339
Income tax expense (benefit)	2,089		15,390		7,763		17,667
Net income (loss)	348,872		295,892		1,016,186		1,269,672
Net income (loss) attributable to noncontrolling interests	9,257		7,412		25,884		29,714
Net income (loss) attributable to Western Midstream Partners, LP	$	339,615	$	288,480	$	990,302	$	1,239,958
Limited partners’ interest in net income (loss):
Net income (loss) attributable to Western Midstream Partners, LP	$	339,615	$	288,480	$	990,302	$	1,239,958

General partner interest in net (income) loss	(7,885)		(6,708)		(22,985)		(28,845)
Limited partners’ interest in net income (loss) (3)	331,730		281,772		967,317		1,211,113
Net income (loss) per common unit – basic (3)	$	0.87	$	0.74	$	2.54	$	3.18
Net income (loss) per common unit – diluted (3)	$	0.87	$	0.74	$	2.53	$	3.17
Weighted-average common units outstanding – basic (3)	381,330		380,513		381,216		380,343
Weighted-average common units outstanding – diluted (3)	382,788		382,620		382,630		382,189

_________________________________________________________________________________________

(1)Total revenues and other includes related-party amounts of $586.0 million and $1.7 billion for the three and nine months ended September 30, 2025, respectively, and $545.2 million and $1.6 billion for the three and nine months ended September 30, 2024, respectively. See Note 6.

(2)Total operating expenses includes related-party amounts of $3.2 million and $(16.2) million for the three and nine months ended September 30, 2025, respectively, and $(12.1) million and $(37.7) million for the three and nine months ended September 30, 2024, respectively. See Note 6.

(3)See Note 5.

See accompanying Notes to Consolidated Financial Statements.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP

CONSOLIDATED BALANCE SHEETS

(UNAUDITED)





thousands except number of units	September 30, 2025		December 31, 2024
ASSETS
Current assets
Cash and cash equivalents	$	177,288	$	1,090,464
Accounts receivable, net	682,673		701,838
Other current assets	57,090		54,888
Total current assets	917,051		1,847,190
Property, plant, and equipment
Cost	15,985,933		15,509,910
Less accumulated depreciation	6,259,586		5,795,301
Net property, plant, and equipment	9,726,347		9,714,609
Goodwill	4,783		4,783
Other intangible assets	625,990		649,740
Equity investments	510,628		541,435
Other assets	340,553		387,028
Total assets (1)	$	12,125,352	$	13,144,785
LIABILITIES, EQUITY, AND PARTNERS’ CAPITAL
Current liabilities
Accounts and imbalance payables	$	297,029	$	312,945
Short-term debt	13,062		1,011,032
Accrued ad valorem taxes	51,035		38,319
Accrued liabilities	279,346		329,398
Total current liabilities	640,472		1,691,694
Long-term liabilities
Long-term debt	6,924,291		6,926,647
Deferred income taxes	31,915		29,679
Asset retirement obligations	389,829		370,195
Other liabilities	810,209		751,400
Total long-term liabilities	8,156,244		8,077,921
Total liabilities (2)	8,796,716		9,769,615
Equity and partners’ capital
Common units (381,333,269 and 380,556,643 units issued and outstanding at September 30, 2025, and December 31, 2024, respectively)	3,172,802		3,224,802
General partner units (9,060,641 units issued and outstanding at September 30, 2025, and December 31, 2024)	9,370		10,803
Total partners’ capital	3,182,172		3,235,605
Noncontrolling interests	146,464		139,565
Total equity and partners’ capital	3,328,636		3,375,170
Total liabilities, equity, and partners’ capital	$	12,125,352	$	13,144,785

________________________________________________________________________________________

(1)Total assets includes related-party amounts of $965.4 million and $991.1 million as of September 30, 2025, and December 31, 2024, respectively, which includes related-party Accounts receivable, net of $412.9 million and $401.3 million as of September 30, 2025, and December 31, 2024, respectively. See Note 6.

(2)Total liabilities includes related-party amounts of $634.8 million and $529.7 million as of September 30, 2025, and December 31, 2024, respectively, which includes related-party Accounts and imbalance payable of $32.8 million and $20.6 million as of September 30, 2025, and December 31, 2024, respectively. See Note 6.

See accompanying Notes to Consolidated Financial Statements.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP

CONSOLIDATED STATEMENTS OF EQUITY AND PARTNERS’ CAPITAL

(UNAUDITED)


	Partners’ Capital
thousands	Common Units		General Partner Units		Noncontrolling Interests		Total
Balance at December 31, 2024	$	3,224,802	$	10,803	$	139,565	$	3,375,170
Net income (loss)	301,837		7,170		7,545		316,552

Distributions to noncontrolling interest owner of WES Operating	—		—		(6,949)		(6,949)
Distributions to Partnership unitholders	(333,068)		(7,928)		—		(340,996)

Equity-based compensation expense	8,248		—		—		8,248

Other	(18,454)		—		—		(18,454)



Balance at March 31, 2025	$	3,183,365	$	10,045	$	140,161	$	3,333,571
Net income (loss)	333,750		7,930		9,082		350,762

Distributions to noncontrolling interest owner of WES Operating	—		—		(7,268)		(7,268)
Distributions to Partnership unitholders	(347,008)		(8,245)		—		(355,253)

Equity-based compensation expense	10,713		—		—		10,713

Other	(1,588)		—		2,500		912



Balance at June 30, 2025	$	3,179,232	$	9,730	$	144,475	$	3,333,437
Net income (loss)	331,730		7,885		9,257		348,872

Distributions to noncontrolling interest owner of WES Operating	—		—		(7,268)		(7,268)
Distributions to Partnership unitholders	(347,009)		(8,245)		—		(355,254)

Equity-based compensation expense	10,456		—		—		10,456

Other	(1,607)		—		—		(1,607)



Balance at September 30, 2025	$	3,172,802	$	9,370	$	146,464	$	3,328,636

See accompanying Notes to Consolidated Financial Statements.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP

CONSOLIDATED STATEMENTS OF EQUITY AND PARTNERS’ CAPITAL

(UNAUDITED)


	Partners’ Capital
thousands	Common Units		General Partner Units		Noncontrolling Interests		Total
Balance at December 31, 2023	$	2,894,231	$	3,193	$	131,706	$	3,029,130
Net income (loss)	559,500		13,330		13,386		586,216
Distributions to Chipeta noncontrolling interest owner	—		—		(1,085)		(1,085)
Distributions to noncontrolling interest owner of WES Operating	—		—		(4,591)		(4,591)
Distributions to Partnership unitholders	(218,228)		(5,210)		—		(223,438)

Equity-based compensation expense	9,423		—		—		9,423

Other	(19,364)		—		—		(19,364)



Balance at March 31, 2024	$	3,225,562	$	11,313	$	139,416	$	3,376,291
Net income (loss)	369,841		8,807		8,916		387,564
Distributions to Chipeta noncontrolling interest owner	—		—		(593)		(593)
Distributions to noncontrolling interest owner of WES Operating	—		—		(6,955)		(6,955)
Distributions to Partnership unitholders	(332,930)		(7,928)		—		(340,858)

Equity-based compensation expense	10,391		—		—		10,391

Other	(1,831)		—		—		(1,831)



Balance at June 30, 2024	$	3,271,033	$	12,192	$	140,784	$	3,424,009
Net income (loss)	281,772		6,708		7,412		295,892
Distributions to Chipeta noncontrolling interest owner	—		—		(550)		(550)
Distributions to noncontrolling interest owner of WES Operating	—		—		(6,956)		(6,956)
Distributions to Partnership unitholders	(332,931)		(7,928)		—		(340,859)

Equity-based compensation expense	8,759		—		—		8,759

Other	(2,778)		—		—		(2,778)



Balance at September 30, 2024	$	3,225,855	$	10,972	$	140,690	$	3,377,517

See accompanying Notes to Consolidated Financial Statements.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP

CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)




	Nine Months Ended September 30,
thousands	2025		2024
Cash flows from operating activities
Net income (loss)	$	1,016,186	$	1,269,672
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	512,896		487,438
Long-lived asset and other impairments	12,251		6,204

Non-cash equity-based compensation expense	29,417		28,573
Deferred income taxes	2,236		14,178
Accretion and amortization of long-term obligations, net	6,130		6,884
Equity income, net – related parties	(64,410)		(84,227)
Distributions from equity-investment earnings – related parties	69,217		83,091
(Gain) loss on divestiture and other, net	8,048		(299,426)
(Gain) loss on early extinguishment of debt	—		(5,403)

Other	286		239
Changes in assets and liabilities:
(Increase) decrease in accounts receivable, net	19,165		(12,595)
Increase (decrease) in accounts and imbalance payables and accrued liabilities, net	(56,482)		(78,884)
Change in other items, net	110,040		166,670
Net cash provided by operating activities	1,664,980		1,582,414
Cash flows from investing activities
Capital expenditures	(505,783)		(595,087)

Acquisitions from third parties	—		(443)

Distributions from equity investments in excess of cumulative earnings – related parties	26,000		27,560

Proceeds from the sale of assets to third parties	162		792,241
(Increase) decrease in materials and supplies inventory and other	3,329		(33,118)
Net cash (used in) provided by investing activities	(476,292)		191,153
Cash flows from financing activities
Borrowings, net of debt issuance costs	(1,171)		789,193
Repayments of debt	(1,000,589)		(143,852)
Commercial paper borrowings (repayments), net	—		(610,312)
Increase (decrease) in outstanding checks	(3,114)		(2,282)
Distributions to Partnership unitholders (1)	(1,051,503)		(905,155)
Distributions to Chipeta noncontrolling interest owner	—		(2,228)
Distributions to noncontrolling interest owner of WES Operating	(21,485)		(18,502)


Other	(24,002)		(28,479)
Net cash used in financing activities	(2,101,864)		(921,617)
Net increase (decrease) in cash and cash equivalents	(913,176)		851,950
Cash and cash equivalents at beginning of period	1,090,464		272,787
Cash and cash equivalents at end of period	$	177,288	$	1,124,737
Supplemental disclosures
Interest paid, net of capitalized interest	$	318,228	$	307,049
Income taxes paid (reimbursements received)	2,301		—
Accrued capital expenditures	62,118		128,508

_________________________________________________________________________________________

(1)Includes related-party amounts. See Note 6.

See accompanying Notes to Consolidated Financial Statements.

Table of Contents

WESTERN MIDSTREAM OPERATING, LP

CONSOLIDATED STATEMENTS OF OPERATIONS

(UNAUDITED)




	Three Months Ended September 30,				Nine Months Ended September 30,
thousands	2025		2024		2025		2024
Revenues and other
Service revenues – fee based	$	868,253	$	814,319	$	2,542,869	$	2,389,366
Service revenues – product based	33,919		49,115		143,613		177,321
Product sales	50,129		19,673		124,878		109,076
Other	183		255		562		957
Total revenues and other (1)	952,484		883,362		2,811,922		2,676,720
Equity income, net – related parties	16,847		23,977		64,410		84,227
Operating expenses
Cost of product	51,187		32,847		135,360		132,936
Operation and maintenance	212,385		231,066		663,528		649,324
General and administrative	63,780		64,017		196,599		193,497
Property and other taxes	15,725		12,635		51,356		43,984
Depreciation and amortization	170,323		166,015		512,896		487,438
Long-lived asset and other impairments	11,562		4,651		12,251		6,204

Total operating expenses (2)	524,962		511,231		1,571,990		1,513,383
Gain (loss) on divestiture and other, net	(2,470)		467		(8,048)		299,426
Operating income (loss)	441,899		396,575		1,296,294		1,546,990
Interest expense	(92,353)		(94,149)		(284,816)		(279,177)
Gain (loss) on early extinguishment of debt	—		—		—		5,403
Other income (expense), net	1,707		9,498		12,781		15,930
Income (loss) before income taxes	351,253		311,924		1,024,259		1,289,146
Income tax expense (benefit)	2,089		15,390		7,763		17,667
Net income (loss)	349,164		296,534		1,016,496		1,271,479
Net income (loss) attributable to noncontrolling interest	2,316		1,509		5,660		4,364
Net income (loss) attributable to Western Midstream Operating, LP	$	346,848	$	295,025	$	1,010,836	$	1,267,115

________________________________________________________________________________________

(2)Total operating expenses includes related-party amounts of $4.1 million and $(12.9) million for the three and nine months ended September 30, 2025, respectively, and $(11.2) million and $(34.7) million for the three and nine months ended September 30, 2024, respectively. See Note 6.

See accompanying Notes to Consolidated Financial Statements.

Table of Contents

WESTERN MIDSTREAM OPERATING, LP

CONSOLIDATED BALANCE SHEETS

(UNAUDITED)





thousands except number of units	September 30, 2025		December 31, 2024
ASSETS
Current assets
Cash and cash equivalents	$	170,739	$	1,084,446
Accounts receivable, net	703,237		701,814
Other current assets	55,341		53,775
Total current assets	929,317		1,840,035
Property, plant, and equipment
Cost	15,985,933		15,509,910
Less accumulated depreciation	6,259,586		5,795,301
Net property, plant, and equipment	9,726,347		9,714,609
Goodwill	4,783		4,783
Other intangible assets	625,990		649,740
Equity investments	510,628		541,435
Other assets	337,463		383,808
Total assets (1)	$	12,134,528	$	13,134,410
LIABILITIES, EQUITY, AND PARTNERS’ CAPITAL
Current liabilities
Accounts and imbalance payables	$	296,890	$	339,108
Short-term debt	13,062		1,011,032
Accrued ad valorem taxes	51,035		38,319
Accrued liabilities	220,696		248,589

Total current liabilities	581,683		1,637,048
Long-term liabilities
Long-term debt	6,924,291		6,926,647
Deferred income taxes	31,915		29,679
Asset retirement obligations	389,829		370,195
Other liabilities	806,637		744,715
Total long-term liabilities	8,152,672		8,071,236
Total liabilities (2)	8,734,355		9,708,284
Equity and partners’ capital
Common units (318,675,578 units issued and outstanding at September 30, 2025, and December 31, 2024)	3,365,537		3,399,650



Total partners’ capital	3,365,537		3,399,650
Noncontrolling interest	34,636		26,476
Total equity and partners’ capital	3,400,173		3,426,126
Total liabilities, equity, and partners’ capital	$	12,134,528	$	13,134,410

_________________________________________________________________________________________

(1)Total assets includes related-party amounts of $982.2 million and $987.4 million as of September 30, 2025, and December 31, 2024, respectively, which includes related-party Accounts receivable, net of $433.5 million and $401.3 million as of September 30, 2025, and December 31, 2024, respectively. See Note 6.

(2)Total liabilities includes related-party amounts of $634.8 million and $555.9 million as of September 30, 2025, and December 31, 2024, respectively, which includes related-party Accounts and imbalance payable of $32.8 million and $46.8 million as of September 30, 2025, and December 31, 2024, respectively. See Note 6.

See accompanying Notes to Consolidated Financial Statements.

Table of Contents

WESTERN MIDSTREAM OPERATING, LP

CONSOLIDATED STATEMENTS OF EQUITY AND PARTNERS’ CAPITAL

(UNAUDITED)



thousands	Common Units		Noncontrolling Interest		Total
Balance at December 31, 2024	$	3,399,650	$	26,476	$	3,426,126
Net income (loss)	315,076		1,242		316,318

Distributions to WES Operating unitholders	(347,356)		—		(347,356)
Contributions of equity-based compensation from WES	8,144		—		8,144





Balance at March 31, 2025	$	3,375,514	$	27,718	$	3,403,232
Net income (loss)	348,912		2,102		351,014

Distributions to WES Operating unitholders	(363,290)		—		(363,290)
Contributions of equity-based compensation from WES	10,563		—		10,563

Other	—		2,500		2,500



Balance at June 30, 2025	$	3,371,699	$	32,320	$	3,404,019
Net income (loss)	346,848		2,316		349,164

Distributions to WES Operating unitholders	(363,290)		—		(363,290)
Contributions of equity-based compensation from WES	10,280		—		10,280





Balance at September 30, 2025	$	3,365,537	$	34,636	$	3,400,173



thousands	Common Units		Noncontrolling Interest		Total
Balance at December 31, 2023	$	3,027,031	$	25,323	$	3,052,354
Net income (loss)	584,831		1,686		586,517
Distributions to Chipeta noncontrolling interest owner	—		(1,085)		(1,085)
Distributions to WES Operating unitholders	(229,446)		—		(229,446)
Contributions of equity-based compensation from WES	9,278		—		9,278





Balance at March 31, 2024	$	3,391,694	$	25,924	$	3,417,618
Net income (loss)	387,259		1,169		388,428
Distributions to Chipeta noncontrolling interest owner	—		(593)		(593)
Distributions to WES Operating unitholders	(347,675)		—		(347,675)
Contributions of equity-based compensation from WES	10,247		—		10,247





Balance at June 30, 2024	$	3,441,525	$	26,500	$	3,468,025
Net income (loss)	295,025		1,509		296,534
Distributions to Chipeta noncontrolling interest owner	—		(550)		(550)
Distributions to WES Operating unitholders	(347,675)		—		(347,675)
Contributions of equity-based compensation from WES	8,613		—		8,613





Balance at September 30, 2024	$	3,397,488	$	27,459	$	3,424,947

See accompanying Notes to Consolidated Financial Statements.

Table of Contents

WESTERN MIDSTREAM OPERATING, LP

CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)




	Nine Months Ended September 30,
thousands	2025		2024
Cash flows from operating activities
Net income (loss)	$	1,016,496	$	1,271,479
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	512,896		487,438
Long-lived asset and other impairments	12,251		6,204

Non-cash equity-based compensation expense	28,987		28,138
Deferred income taxes	2,236		14,178
Accretion and amortization of long-term obligations, net	6,130		6,884
Equity income, net – related parties	(64,410)		(84,227)
Distributions from equity-investment earnings – related parties	69,217		83,091
(Gain) loss on divestiture and other, net	8,048		(299,426)
(Gain) loss on early extinguishment of debt	—		(5,403)
Other	286		239
Changes in assets and liabilities:
(Increase) decrease in accounts receivable, net	(1,423)		(15,780)
Increase (decrease) in accounts and imbalance payables and accrued liabilities, net	(60,557)		(102,104)
Change in other items, net	113,658		166,545
Net cash provided by operating activities	1,643,815		1,557,256
Cash flows from investing activities
Capital expenditures	(505,783)		(595,087)

Acquisitions from third parties	—		(443)

Distributions from equity investments in excess of cumulative earnings – related parties	26,000		27,560

Proceeds from the sale of assets to third parties	162		792,241
(Increase) decrease in materials and supplies inventory and other	3,329		(33,118)
Net cash (used in) provided by investing activities	(476,292)		191,153
Cash flows from financing activities
Borrowings, net of debt issuance costs	(1,171)		789,193
Repayments of debt	(1,000,589)		(143,852)
Commercial paper borrowings (repayments), net	—		(610,312)
Increase (decrease) in outstanding checks	(3,180)		(2,245)
Distributions to WES Operating unitholders (1)	(1,073,936)		(924,796)




Distributions to Chipeta noncontrolling interest owner	—		(2,228)

Other	(2,354)		(4,505)
Net cash used in financing activities	(2,081,230)		(898,745)
Net increase (decrease) in cash and cash equivalents	(913,707)		849,664
Cash and cash equivalents at beginning of period	1,084,446		268,184
Cash and cash equivalents at end of period	$	170,739	$	1,117,848
Supplemental disclosures
Interest paid, net of capitalized interest	$	318,228	$	307,049
Income taxes paid (reimbursements received)	2,301		—
Accrued capital expenditures	62,118		128,508

________________________________________________________________________________________

(1)Includes related-party amounts. See Note 6.

See accompanying Notes to Consolidated Financial Statements.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

General. Western Midstream Partners, LP (the “Partnership”) is a Delaware master limited partnership formed in September 2012. Western Midstream Operating, LP (together with its subsidiaries, “WES Operating”) is a Delaware limited partnership formed in 2007 to acquire, own, develop, and operate midstream assets. The Partnership owns, directly and indirectly, a 98.0% limited partner interest in WES Operating, and directly owns all of the outstanding equity interests of Western Midstream Operating GP, LLC, which holds the entire non-economic general partner interest in WES Operating. In addition, Occidental owns the Partnership’s general partner and a 2.0% limited partner interest in WES Operating through its ownership of WGR Asset Holding Company LLC (“WGRAH”).

For purposes of these consolidated financial statements, the Partnership refers to Western Midstream Partners, LP in its individual capacity or to Western Midstream Partners, LP and its subsidiaries, including Western Midstream Operating GP, LLC and WES Operating, as the context requires. “WES Operating GP” refers to Western Midstream Operating GP, LLC, individually as the general partner of WES Operating. The Partnership’s general partner, Western Midstream Holdings, LLC (the “general partner”), is a wholly owned subsidiary of Occidental Petroleum Corporation. “Occidental” refers to Occidental Petroleum Corporation, as the context requires, and its subsidiaries, excluding the general partner. “Related parties” refers to Occidental (see Note 6), the Partnership’s investments accounted for under the equity method of accounting (see Note 7), and WES Operating for transactions with the Partnership that eliminate upon consolidation (see Note 6).

The Partnership is engaged in the business of gathering, compressing, treating, processing, and transporting natural gas; gathering, stabilizing, and transporting condensate, natural-gas liquids (“NGLs”), and crude oil; and gathering, transporting, recycling, treating, and disposing of produced water. In its capacity as a natural-gas processor, the Partnership also buys and sells residue, NGLs, and condensate on behalf of itself and its customers under certain contracts. As of September 30, 2025, the Partnership’s assets and investments consisted of the following:


	Wholly Owned and Operated	Operated Interests	Equity Interests
Gathering systems (1)	18	2	1
Treating facilities	43	3	—
Processing plants/trains	27	3	1
NGLs pipelines	3	—	4
Natural-gas pipelines	6	—	1
Crude-oil pipelines	2	1	1

_________________________________________________________________________________________

(1)Includes the DBM water systems.

These assets and investments are located in Texas, New Mexico, and the Rocky Mountains (Colorado, Utah, and Wyoming).

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

Basis of presentation. The consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and include the accounts of the Partnership and entities in which it holds a controlling or other financial interest, including WES Operating, WES Operating GP, proportionately consolidated interests, and equity investments. All significant intercompany transactions have been eliminated.

The consolidated financial results of WES Operating are included in the Partnership’s consolidated financial statements. Throughout these notes to consolidated financial statements, and to the extent material, any differences between the consolidated financial results of the Partnership and WES Operating are discussed separately. The Partnership’s consolidated financial statements differ from those of WES Operating primarily as a result of (i) the presentation of noncontrolling interest ownership (see Noncontrolling interests below), (ii) the elimination of WES Operating GP’s investment in WES Operating with WES Operating GP’s underlying capital account, (iii) the general and administrative expenses incurred by the Partnership, which are separate from, and in addition to, those incurred by WES Operating, (iv) the inclusion of the impact of Partnership equity balances and Partnership distributions, and (v) transactions between the Partnership and WES Operating that eliminate upon consolidation.

Certain information and note disclosures commonly included in annual financial statements have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, the accompanying consolidated financial statements and notes should be read in conjunction with the Partnership’s 2024 Form 10-K, as filed with the SEC on February 26, 2025. Management believes that the disclosures made are adequate to make the information not misleading.

Use of estimates. In preparing financial statements in accordance with GAAP, management makes informed judgments and estimates that affect the reported amounts of assets, liabilities, revenues, and expenses. Management evaluates its estimates and related assumptions regularly, using historical experience and other reasonable methods. Changes in facts and circumstances or additional information may result in revised estimates, and actual results may differ from these estimates. Effects on the business, financial condition, and results of operations resulting from revisions to estimates are recognized when the facts that give rise to the revisions become known. The information included herein reflects all normal recurring adjustments which are, in the opinion of management, necessary for a fair presentation of the consolidated financial statements.

Noncontrolling interests. The Partnership’s noncontrolling interests in the consolidated financial statements consist of (i) the 25% third-party interest in Chipeta and (ii) the 2.0% limited partner interest in WES Operating owned by an Occidental subsidiary. WES Operating’s noncontrolling interest in the consolidated financial statements consists of the 25% third-party interest in Chipeta.

Inventory. As of September 30, 2025, and December 31, 2024, Other current assets includes (i) $2.3 million and $2.5 million, respectively, of NGLs inventory and (ii) $10.6 million and $0.6 million, respectively, of materials and supplies inventory that are classified as short term on the consolidated balance sheets. As of September 30, 2025, and December 31, 2024, Other assets includes (i) $3.1 million and $5.5 million, respectively, of NGLs line-fill inventory, and (ii) $109.5 million and $110.3 million, respectively, of materials and supplies inventory that are classified as long term on the consolidated balance sheets.

Segments. The Partnership’s operations continue to be organized into a single operating segment, the assets of which gather, compress, treat, process, and transport natural gas; gather, stabilize, and transport condensate, NGLs, and crude oil; and gather and dispose of produced water in the United States.

Accounting Standards Update 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures” was adopted on December 31, 2024, using a retrospective approach with no impact to the consolidated financial statements; however, the adoption did result in additional disclosure. See Note 11.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

Equity-based compensation. During the nine months ended September 30, 2025 and 2024, the Partnership issued 776,626 common units and 1,035,444 common units, respectively, under its long-term incentive plans. Compensation expense was $10.5 million and $29.4 million for the three and nine months ended September 30, 2025, respectively, and $8.8 million and $28.6 million for the three and nine months ended September 30, 2024, respectively.

New accounting pronouncements not yet adopted. In November 2024, the Financial Accounting Standards Board issued Accounting Standards Update 2024-03, “Income Statement—Reporting Comprehensive Income—Expense Disaggregation (Subtopic 220-40): Disaggregation of Income Statement Expenses.” The standard requires additional disclosure and disaggregation of certain income statement expense line items and may be applied prospectively or retrospectively. The Partnership plans to adopt the standard when it becomes effective beginning with the fiscal year 2027 annual financial statements. The Partnership is assessing the impact of this guidance on its disclosures in the Notes to the Consolidated Financial Statements.

2. REVENUE FROM CONTRACTS WITH CUSTOMERS

The following table summarizes revenue from contracts with customers:




	Three Months Ended September 30,				Nine Months Ended September 30,
thousands	2025		2024		2025		2024
Revenue from customers
Service revenues – fee based	$	868,253	$	814,319	$	2,542,869	$	2,389,366
Service revenues – product based	33,919		49,115		143,613		177,321
Product sales	50,129		19,673		124,878		109,076
Total revenue from customers	952,301		883,107		2,811,360		2,675,763
Revenue from other than customers


Other	183		255		562		957
Total revenues and other	$	952,484	$	883,362	$	2,811,922	$	2,676,720

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

2. REVENUE FROM CONTRACTS WITH CUSTOMERS

Contract balances. Receivables from customers, which are included in Accounts receivable, net on the consolidated balance sheets, were $671.4 million and $693.9 million as of September 30, 2025, and December 31, 2024, respectively.

Contract assets primarily relate to (i) revenue accrued but not yet billed under cost-of-service contracts with fixed and variable fees and (ii) accrued deficiency fees the Partnership expects to charge customers once the related performance periods are completed. The following table summarizes activity related to contract assets from contracts with customers:





thousands
Contract assets balance at December 31, 2024	$	43,186
Amounts transferred to Accounts receivable, net that were included in the contract assets balance at the beginning of the period (1)	(5,378)
Additional estimated revenues recognized (2)	3,533

Contract assets balance at September 30, 2025	$	41,341



Contract assets at September 30, 2025
Other current assets	$	17,511
Other assets	23,830
Total contract assets from contracts with customers	$	41,341

_________________________________________________________________________________________

(1)Includes $(1.8) million for the three months ended September 30, 2025.

(2)Includes $0.6 million for the three months ended September 30, 2025.

Contract liabilities primarily relate to (i) fixed and variable fees under cost-of-service contracts that are received from customers for which revenue recognition is deferred, (ii) aid-in-construction payments received from customers that must be recognized over the expected period of customer benefit, and (iii) fees that are charged to customers for only a portion of the contract term and must be recognized as revenues over the expected period of customer benefit.

The following table summarizes activity related to contract liabilities from contracts with customers:





thousands
Contract liabilities balance at December 31, 2024	$	610,571
Cash received or receivable, excluding revenues recognized during the period (1)	103,846
Revenues recognized that were included in the contract liability balance at the beginning of the period (2)	(9,722)


Contract liabilities balance at September 30, 2025	$	704,695



Contract liabilities at September 30, 2025
Accrued liabilities	$	10,929
Other liabilities	693,766
Total contract liabilities from contracts with customers	$	704,695

_________________________________________________________________________________________

(1)Includes $34.1 million for the three months ended September 30, 2025.

(2)Includes $(3.0) million for the three months ended September 30, 2025.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

2. REVENUE FROM CONTRACTS WITH CUSTOMERS

Transaction price allocated to remaining performance obligations. Revenues expected to be recognized from certain performance obligations that are unsatisfied (or partially unsatisfied) as of September 30, 2025, are presented in the table below. The Partnership applies the optional exemptions in Revenue from Contracts with Customers (Topic 606) and does not disclose consideration for remaining performance obligations with an original expected duration of one year or less or for variable consideration related to unsatisfied (or partially unsatisfied) performance obligations. Therefore, the following table represents only a portion of expected future revenues from existing contracts, as most future revenues from customers are dependent on future variable customer volumes and, in some cases, variable commodity prices for those volumes.


thousands
Remainder of 2025	$	251,545
2026	1,131,557
2027	1,153,720
2028	995,627
2029	685,667
Thereafter	2,586,102
Total	$	6,804,218

3. ACQUISITIONS AND DIVESTITURES

Marcellus Interest systems. During the second quarter of 2024, the Partnership closed on the sale of its 33.75% interest in the Marcellus Interest systems for proceeds of $206.2 million, resulting in a net gain on sale of $63.9 million that was recorded as Gain (loss) on divestiture and other, net in the consolidated statement of operations.

Mont Belvieu JV, Whitethorn LLC, Panola, and Saddlehorn. During the first quarter of 2024, the Partnership closed on the sale of the following equity investments to third parties: (i) the 25.00% interest in Enterprise EF78 LLC, (ii) the 20.00% interest in Whitethorn Pipeline Company LLC, (iii) the 15.00% interest in Panola Pipeline Company, LLC, and (iv) the 20.00% interest in Saddlehorn Pipeline Company, LLC. The combined proceeds received in the first quarter of 2024 of $588.6 million includes $5.9 million in pro-rata distributions through closing, resulting in a net gain on sale of $239.7 million that was recorded as Gain (loss) on divestiture and other, net in the consolidated statement of operations.

See Note 12 for information related to the acquisition of Aris Water Solutions, Inc. (“Aris”) that closed on October 15, 2025.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

4. PARTNERSHIP DISTRIBUTIONS

Partnership distributions. The Partnership distributes all of its available cash, as defined in the partnership agreement, to unitholders of record on the applicable record date within 55 days following each quarter’s end.

The Board of Directors of the general partner (the “Board”) declared the following cash distributions to the Partnership’s unitholders for the periods presented:


thousands except per-unit amounts Quarters Ended	Total Quarterly Per-unit Distribution		Total Quarterly Cash Distribution		Distribution Date	Record Date





2024
March 31	$	0.875	$	340,858	May 15, 2024	May 1, 2024
June 30	0.875		340,859		August 14, 2024	August 1, 2024
September 30	0.875		340,914		November 14, 2024	November 1, 2024
December 31	0.875		340,996		February 14, 2025	February 3, 2025
2025
March 31	$	0.910	$	355,253	May 15, 2025	May 2, 2025
June 30	0.910		355,254		August 14, 2025	August 1, 2025
September 30	0.910		379,521		November 14, 2025	October 31, 2025

WES Operating partnership distributions. WES Operating makes quarterly cash distributions to the Partnership and WGRAH, a subsidiary of Occidental, in proportion to their share of limited partner interests in WES Operating. WES Operating made and/or declared the following cash distributions to its limited partners for the periods presented:

thousands

Quarters Ended

Total Quarterly
Cash Distribution

Distribution
Date

2024

March 31

347,675

May 2024

June 30

347,675

August 2024

September 30

347,356

November 2024

December 31

347,356

February 2025

2025

March 31

363,290

May 2025

June 30

363,290

August 2025

September 30

391,568

October 2025

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

5. EQUITY AND PARTNERS’ CAPITAL

Holdings of Partnership equity. The Partnership’s common units are listed on the New York Stock Exchange under the ticker symbol “WES.” As of September 30, 2025, Occidental held 165,681,578 common units, representing a 42.4% limited partner interest in the Partnership, and through its ownership of the general partner, Occidental indirectly held 9,060,641 general partner units, representing a 2.3% general partner interest in the Partnership. The public held 215,651,691 common units, representing a 55.3% limited partner interest in the Partnership.

On October 15, 2025, the Partnership issued common units in connection with the acquisition of Aris. See Note 12 for additional information.

Partnership equity repurchases. In February 2025, the Board authorized the Partnership to buy back up to $250.0 million of the Partnership’s common units through December 31, 2026 (the “2025 Purchase Program”). The common units may be purchased from time to time in the open market at prevailing market prices or in privately negotiated transactions. During the nine months ended September 30, 2025, the Partnership repurchased no common units. As of September 30, 2025, the Partnership had an authorized amount of $250.0 million remaining under the program.

Partnership’s net income (loss) per common unit. The common and general partner unitholders’ allocation of net income (loss) attributable to the Partnership was equal to their cash distributions plus their respective allocations of undistributed earnings or losses in accordance with their weighted-average ownership percentage during each period using the two-class method.

The following table provides a reconciliation between basic and diluted net income (loss) per common unit:




	Three Months Ended September 30,				Nine Months Ended September 30,
thousands except per-unit amounts	2025		2024		2025		2024
Net income (loss)
Limited partners’ interest in net income (loss)	$	331,730	$	281,772	$	967,317	$	1,211,113
Weighted-average common units outstanding
Basic	381,330		380,513		381,216		380,343
Dilutive effect of non-vested phantom units	1,458		2,107		1,414		1,846
Diluted	382,788		382,620		382,630		382,189
Excluded due to anti-dilutive effect	—		—		—		2
Net income (loss) per common unit
Basic	$	0.87	$	0.74	$	2.54	$	3.18
Diluted	$	0.87	$	0.74	$	2.53	$	3.17

WES Operating’s net income (loss) per common unit. Net income (loss) per common unit for WES Operating is not calculated because it has no publicly traded units.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

6. RELATED-PARTY TRANSACTIONS

Summary of related-party transactions. The following tables summarize material related-party transactions included in the Partnership’s consolidated financial statements:



Statements of operations

	Three Months Ended September 30,				Nine Months Ended September 30,
thousands	2025		2024		2025		2024
Revenues and other
Service revenues – fee based	$	566,912	$	530,434	$	1,667,849	$	1,533,251
Service revenues – product based	5,416		13,664		29,529		44,214
Product sales	13,639		1,109		23,238		1,642
Total revenues and other	585,967		545,207		1,720,616		1,579,107
Equity income, net – related parties (1)	16,847		23,977		64,410		84,227
Operating expenses
Cost of product (2)	1,332		(14,638)		(21,710)		(46,685)
Operation and maintenance	1,833		2,523		5,314		8,665
General and administrative	—		45		210		299
Total operating expenses	3,165		(12,070)		(16,186)		(37,721)

_________________________________________________________________________________________

(1)See Note 7.

(2)Includes related-party natural-gas and NGLs imbalances.


Balance sheets


thousands	September 30, 2025		December 31, 2024
Assets
Accounts receivable, net	$	412,934	$	401,315
Other current assets	7,244		6,671
Equity investments (1)	510,628		541,435
Other assets	34,631		41,641
Total assets	965,437		991,062
Liabilities
Accounts and imbalance payables	32,827		20,609
Accrued liabilities	4,734		4,717
Other liabilities (2)	597,253		504,415
Total liabilities	634,814		529,741

_________________________________________________________________________________________

(1)See Note 7.

(2)Includes contract liabilities from contracts with customers. See Note 2.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

6. RELATED-PARTY TRANSACTIONS



Statements of cash flows

	Nine Months Ended September 30,
thousands	2025		2024
Distributions from equity-investment earnings – related parties	$	69,217	$	83,091



Distributions from equity investments in excess of cumulative earnings – related parties	26,000		27,560

Distributions to Partnership unitholders (1)	(470,929)		(451,613)
Distributions to WES Operating unitholders (2)	(21,485)		(18,502)

_________________________________________________________________________________________

(1)Represents common and general partner unit distributions paid to Occidental pursuant to the partnership agreement of the Partnership. See Note 4 and Note 5.

(2)Represents distributions paid to Occidental, through its ownership of WGRAH, pursuant to WES Operating’s partnership agreement. See Note 4 and Note 5.

The following tables summarize material related-party transactions for WES Operating (which are included in the Partnership’s consolidated financial statements) to the extent the amounts differ materially from the Partnership’s consolidated financial statements:



Statements of operations

	Three Months Ended September 30,				Nine Months Ended September 30,
thousands	2025		2024		2025		2024
General and administrative (1)	$	909	$	944	$	3,465	$	3,292

_________________________________________________________________________________________

(1)Includes an intercompany service fee between the Partnership and WES Operating.


Balance sheets


thousands	September 30, 2025		December 31, 2024
Accounts receivable, net (1)	$	433,522	$	401,315
Other current assets	6,496		6,263
Other assets	31,541		38,421
Accounts and imbalance payables (1)	32,827		46,773

_________________________________________________________________________________________

(1)Includes balances related to transactions between the Partnership and WES Operating.



Statements of cash flows

	Nine Months Ended September 30,
thousands		2025		2024
Distributions to WES Operating unitholders (1)		$	(1,073,936)	$	(924,796)

_________________________________________________________________________________________

(1)Represents distributions paid to the Partnership and Occidental, through its ownership of WGRAH, pursuant to WES Operating’s partnership agreement. See Note 4 and Note 5.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

6. RELATED-PARTY TRANSACTIONS

Related-party revenues. Related-party revenues include amounts earned by the Partnership from services provided to Occidental and from the sale of natural gas, condensate, and NGLs to Occidental.

Gathering and processing agreements. The Partnership has significant gathering, treating, processing, stabilization, and produced-water disposal arrangements with affiliates of Occidental on most of its systems. While Occidental is the contracting counterparty of the Partnership, these arrangements with Occidental include not just Occidental-produced volumes, but also, in some instances, the volumes of other working-interest owners of Occidental who rely on the Partnership’s facilities and infrastructure to bring their volumes to market. Natural-gas throughput (excluding equity-investment throughput) attributable to production owned or controlled by Occidental was 35% for both the three and nine months ended September 30, 2025, and 36% and 34% for the three and nine months ended September 30, 2024, respectively. Crude-oil and NGLs throughput (excluding equity-investment throughput) attributable to production owned or controlled by Occidental was 90% and 91% for the three and nine months ended September 30, 2025, respectively, and 92% and 90% for the three and nine months ended September 30, 2024, respectively. Produced-water throughput attributable to production owned or controlled by Occidental was 79% for both the three and nine months ended September 30, 2025, and 78% and 77% for the three and nine months ended September 30, 2024, respectively.

The Partnership is currently discussing varying interpretations of certain contractual provisions with Occidental regarding the calculation of the cost-of-service rates under an oil-gathering contract related to the Partnership’s DJ Basin oil-gathering system. If such discussions are resolved in a manner adverse to the Partnership, such resolution could have a negative impact on the Partnership’s financial condition and results of operations, including a reduction in rates and a non-cash charge to earnings.

Marketing Services. Prior to January 1, 2021, Occidental provided marketing-related services to certain of the Partnership’s subsidiaries. While the Partnership now markets and sells substantially all of its crude oil, residue gas, and NGLs directly to third parties, it does still have some marketing agreements with affiliates of Occidental, the activity for which is reflected in the related-party statements of operations above.

Operating leases. Certain surface-use and salt-water disposal agreements between an affiliate of Occidental and certain wholly owned subsidiaries of the Partnership are classified as operating leases (see Related-party commercial agreement below). In addition, the Partnership has operating leases for field offices with Occidental as the lessor.

Related-party expenses. Operation and maintenance expense includes amounts accrued for or paid to related parties for field-related costs, field offices, and easements (see Related-party commercial agreement below) supporting the Partnership’s operations at certain assets. General and administrative expense includes amounts accrued for or paid to Occidental for certain reimbursed expenses pursuant to the provisions of the Partnership’s and WES Operating’s agreements with Occidental. Cost of product expense includes amounts related to certain continuing marketing arrangements with affiliates of Occidental, related-party imbalances, and transactions with affiliates accounted for under the equity method of accounting. See Marketing Services in the section above. Related-party expenses bear no direct relationship to related-party revenues, and third-party expenses bear no direct relationship to third-party revenues.

Services Agreement. Occidental performed certain centralized corporate functions for the Partnership and WES Operating pursuant to the agreement dated as of December 31, 2019, between WES Operating GP and Occidental (“Services Agreement”). Most of the administrative and operational services previously provided by Occidental fully transitioned to the Partnership by December 31, 2021, with certain limited transition services remaining in place pursuant to the terms of the Services Agreement.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

6. RELATED-PARTY TRANSACTIONS

Construction reimbursement agreements and purchases and sales with related parties. From time to time, the Partnership enters into construction reimbursement agreements with Occidental providing that the Partnership will manage the construction of certain midstream infrastructure for Occidental in the Partnership’s areas of operation. Such arrangements generally provide for a reimbursement of costs incurred by the Partnership on a cost or cost-plus basis.

Additionally, from time to time, in support of the Partnership’s business, the Partnership purchases and sells equipment, inventory, and other miscellaneous assets from or to Occidental or its affiliates.

Related-party commercial agreement. During the first quarter of 2021, an affiliate of Occidental and the Partnership amended certain West Texas surface-use and salt-water disposal agreements to reduce usage fees owed by the Partnership in exchange for the forgiveness of certain deficiency fees owed by Occidental and other unrelated contractual amendments. The present value of the reduced usage fees under the amended agreements was $30.0 million at the time the agreement was executed. As a result of the amendments, (i) these agreements are classified as operating leases and (ii) a right-of-use (“ROU”) asset, included in Other assets on the consolidated balance sheets, was recognized during the first quarter of 2021. The ROU asset is being amortized to Operation and maintenance expense through 2038, the remaining term of the agreements.

Customer concentration. Occidental was the only customer from which revenues exceeded 10% of consolidated revenues for all periods presented in the consolidated statements of operations.

7. EQUITY INVESTMENTS

The following table presents the financial statement impact of the Partnership’s equity investments:


thousands	Percentage Ownership Interest		Balance at December 31, 2024		Equity income, net		Distributions		Distributions in excess of cumulative earnings (1)		Balance at September 30, 2025
Mi Vida	50.00	%	$	42,765	$	3,794	$	(3,872)	$	(7,960)	$	34,727
FRP	33.33	%	183,588		33,741		(35,821)		(5,116)		176,392
Red Bluff Express	30.00	%	115,085		11,664		(11,664)		(2,497)		112,588
Rendezvous	22.00	%	5,639		(1,803)		(640)		(1,491)		1,705
TEP	20.00	%	170,060		13,914		(14,103)		(5,895)		163,976
TEG	20.00	%	14,496		737		(754)		(391)		14,088
White Cliffs	10.00	%	9,802		2,363		(2,363)		(2,650)		7,152




Total			$	541,435	$	64,410	$	(69,217)	$	(26,000)	$	510,628

_________________________________________________________________________________________

(1)Distributions in excess of cumulative earnings, classified as investing cash flows in the consolidated statements of cash flows, are calculated on an individual-investment basis.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

8. SELECTED COMPONENTS OF WORKING CAPITAL

A summary of accounts receivable, net is as follows:


	The Partnership				WES Operating


thousands	September 30, 2025		December 31, 2024		September 30, 2025		December 31, 2024
Trade receivables, net	$	682,342	$	701,225	$	702,930	$	701,225
Other receivables, net	331		613		307		589
Total accounts receivable, net	$	682,673	$	701,838	$	703,237	$	701,814

A summary of other current assets is as follows:


	The Partnership				WES Operating


thousands	September 30, 2025		December 31, 2024		September 30, 2025		December 31, 2024
NGLs inventory	$	2,341	$	2,514	$	2,341	$	2,514
Materials and supplies	10,575		613		10,575		613
Imbalance receivables	6,318		7,253		6,318		7,253
Prepaid insurance	2,628		15,418		1,627		14,712
Contract assets	17,511		12,358		17,511		12,358
Other	17,717		16,732		16,969		16,325
Total other current assets	$	57,090	$	54,888	$	55,341	$	53,775

A summary of accrued liabilities is as follows:


	The Partnership				WES Operating


thousands	September 30, 2025		December 31, 2024		September 30, 2025		December 31, 2024
Accrued interest expense	$	93,823	$	133,365	$	93,823	$	133,365
Short-term asset retirement obligations	10,805		12,830		10,805		12,830
Short-term remediation and reclamation obligations	721		2,585		721		2,585
Income taxes payable	7,811		4,585		7,811		4,585
Contract liabilities	10,929		11,055		10,929		11,055
Accrued payroll and benefits	56,288		66,563		—		—
Short-term lease liabilities	62,627		58,897		62,627		58,897
Other	36,342		39,518		33,980		25,272
Total accrued liabilities	$	279,346	$	329,398	$	220,696	$	248,589

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

9. DEBT

WES Operating is the borrower for all outstanding debt and is expected to be the borrower for all future debt issuances. The following table presents the outstanding debt:



	September 30, 2025						December 31, 2024
thousands	Principal		Carrying Value		Fair Value (1)		Principal		Carrying Value		Fair Value (1)
Short-term debt




Senior Notes	$	—	$	—	$	—	$	1,000,589	$	1,000,076	$	997,666
Finance lease liabilities	13,062		13,062		13,062		10,956		10,956		10,956
Total short-term debt	$	13,062	$	13,062	$	13,062	$	1,011,545	$	1,011,032	$	1,008,622

Long-term debt














Senior Notes (2)	$	6,976,834	$	6,907,951	$	6,721,238	$	6,976,834	$	6,903,318	$	6,548,127
Finance lease liabilities	16,340		16,340		16,340		23,329		23,329		23,329
Total long-term debt	$	6,993,174	$	6,924,291	$	6,737,578	$	7,000,163	$	6,926,647	$	6,571,456

_________________________________________________________________________________________

(1)Fair value is measured using the market approach and Level-2 fair value inputs.

(2)As of September 30, 2025, maturity dates range from 2026 to 2050.

Debt activity. The following table presents the debt activity for the nine months ended September 30, 2025:


thousands	Carrying Value











Balance at December 31, 2024	$	7,937,679




Repayment of 3.100% Senior Notes due 2025	(663,831)
Repayment of 3.950% Senior Notes due 2025	(336,758)




Finance lease liabilities	(4,883)
Other	5,146
Balance at September 30, 2025	$	6,937,353

WES Operating Senior Notes. In January 2020, WES Operating issued the 4.050% Senior Notes due 2030 and 5.250% Senior Notes due 2050. Including the effects of the issuance prices, underwriting discounts, and interest-rate adjustments, the effective interest rates of the Senior Notes due 2030 and 2050, were 4.169% and 5.363%, respectively, at September 30, 2025 and 2024. The effective interest rate of these notes is subject to adjustment from time to time due to a change in credit rating.

During the second quarter of 2025, WES Operating retired the total principal amount outstanding of the 3.950% Senior Notes due 2025 at par value. During the first quarter of 2025, WES Operating retired the total principal amount outstanding of the 3.100% Senior Notes due 2025 at par value. See Debt activity above. As of September 30, 2025, the 4.650% Senior Notes due 2026 were classified as long-term debt on the consolidated balance sheet as WES Operating has the ability and intent to refinance these obligations using long-term debt.

During the third quarter of 2024, WES Operating completed the public offering of $800.0 million in aggregate principal amount of 5.450% Senior Notes due 2034. Net proceeds from the offering were used to repay a portion of the 3.100% and 3.950% Senior Notes due 2025, and for general partnership purposes, including the funding of capital expenditures. In addition, during 2024, WES Operating purchased and retired $150.0 million of certain of its senior notes via open-market repurchases with cash from operations.

As of September 30, 2025, WES Operating was in compliance with all covenants under the relevant governing indentures.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

9. DEBT

Revolving credit facility. In April 2025, WES Operating exercised an option to extend the maturity date of the RCF from April 2029 to April 2030, for each extending lender. The non-extending lender’s commitments mature in April 2028 and represent $120.0 million out of $2.0 billion of total commitments, which are expandable to a maximum of $2.5 billion, from all lenders.

As of September 30, 2025, there were no outstanding borrowings, resulting in $2.0 billion in effective borrowing capacity under the RCF. Any outstanding commercial paper borrowings (see below) reduce the effective borrowing capacity under the RCF as WES Operating maintains availability under the RCF as support for its commercial paper program. As of September 30, 2025 and 2024, the interest rate on any outstanding RCF borrowings was 5.43% and 6.15%, respectively. The facility-fee rate was 0.20% at September 30, 2025 and 2024. As of September 30, 2025, WES Operating was in compliance with all covenants under the RCF.

Commercial paper program. In November 2023, WES Operating entered into an unsecured commercial paper program under which it may issue (and have outstanding at any one time) an aggregate principal amount up to $2.0 billion. WES Operating intends to maintain a minimum aggregate available borrowing capacity under the RCF equal to the aggregate amount of outstanding commercial paper borrowings. The maturities of the notes may vary but may not exceed 397 days. As of September 30, 2025, there were no outstanding borrowings under the commercial paper program.

10. COMMITMENTS AND CONTINGENCIES

Environmental obligations. The Partnership is subject to various environmental-remediation obligations arising from federal, state, and local regulations regarding air and water quality, hazardous and solid waste disposal, and other environmental matters. As of September 30, 2025, and December 31, 2024, the consolidated balance sheets included $2.2 million and $4.0 million, respectively, of liabilities for remediation and reclamation obligations. The current portion of these amounts is included in Accrued liabilities, and the long-term portion of these amounts is included in Other liabilities. The majority of payments related to these obligations are expected to be made over the next five years. See Note 8.

Litigation and legal proceedings. From time to time, the Partnership is involved in legal, tax, regulatory, and other proceedings in various forums regarding performance, contracts, and other matters that arise in the ordinary course of business. Management is not aware of any such proceeding for which the final disposition could have a material adverse effect on the Partnership’s financial condition, results of operations, or cash flows.

Other commitments. The Partnership has payment obligations, or commitments, that include, among other things, a revolving credit facility, other third-party long-term debt, obligations related to the Partnership’s capital spending programs, pipeline and offload commitments, and various operating and finance leases. The payment obligations related to the Partnership’s capital spending programs, the majority of which is expected to be paid in the next 12 months, primarily relate to expansion, construction, and asset-integrity projects at the DBM water systems, West Texas complex, Powder River Basin complex, and DJ Basin complex.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

11. REPORTABLE SEGMENT

Segment overview. The Partnership’s chief operating decision maker (“CODM”) is the Partnership’s President and Chief Executive Officer who assesses performance and allocates resources on a consolidated basis due to the similar nature of services provided to customers across the Partnership’s domestic asset portfolio. The CODM does not assess performance and allocate resources separately for Western Midstream Operating, LP. Accordingly, the Partnership has a single operating and reportable segment, all the assets of which are in the United States and gather, compress, treat, process, and transport natural gas; gather, stabilize, and transport condensate, NGLs, and crude oil; and gather and dispose of produced water.

Performance measures. Adjusted EBITDA attributable to Western Midstream Partners, LP (“Adjusted EBITDA”) is used as the performance measure by the Partnership’s CODM in assessing performance and allocating resources to the Partnership’s single operating and reportable segment. Net income (loss) is the most comparable GAAP metric to the performance metric of non-GAAP Adjusted EBITDA. The Partnership defines Adjusted EBITDA as net income (loss), plus (i) distributions from equity investments, (ii) non-cash equity-based compensation expense, (iii) interest expense, (iv) income tax expense, (v) depreciation and amortization, (vi) impairments, and (vii) other expense (including lower of cost or market inventory adjustments recorded in cost of product), less (i) gain (loss) on divestiture and other, net, (ii) gain (loss) on early extinguishment of debt, (iii) income from equity investments, (iv) income tax benefit, (v) other income, (vi) other items impacting comparability with the Partnership’s core operating performance, and (vii) the noncontrolling interest owners’ proportionate share of revenues and expenses.

Adjusted EBITDA is a non-GAAP financial measure that the CODM utilizes to assess (i) the Partnership’s operating performance as compared to other publicly traded partnerships in the midstream industry, without regard to financing methods, capital structure, or historical cost basis, (ii) the ability of the Partnership’s assets to generate cash flow to make distributions, and (iii) the viability of acquisitions and capital expenditures and the returns on investment of various investment opportunities. The Partnership’s calculation of Adjusted EBITDA may or may not be comparable to similarly titled measures used by others.

Table of Contents

WESTERN MIDSTREAM PARTNERS, LP AND WESTERN MIDSTREAM OPERATING, LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

11. REPORTABLE SEGMENT

Summarized financial information. The following table presents information about the Partnership’s single operating and reportable segment including (i) total revenues and other, (ii) significant expenses, and (iii) other segment items:




	Three Months Ended September 30,				Nine Months Ended September 30,
thousands	2025		2024		2025		2024
Revenues from external customers (1)	$	952,301	$	883,107	$	2,811,360	$	2,675,763
Other revenues	183		255		562		957
Total revenues and other	952,484		883,362		2,811,922		2,676,720
Equity income, net – related parties	16,847		23,977		64,410		84,227
Less significant expenses: (2)
Operation and maintenance	212,385		231,066		663,528		649,324
Cash general and administrative costs (3)	52,320		55,111		164,033		164,187
Less other segment items:
Depreciation and amortization	170,323		166,015		512,896		487,438
Interest expense	92,353		94,149		284,816		279,177
Other (income) expense, net (4)	(1,754)		(9,565)		(12,923)		(16,124)
Income tax expense (benefit)	2,089		15,390		7,763		17,667
Other (5)	92,743		59,281		240,033		(90,394)
Net income (loss)	$	348,872	$	295,892	$	1,016,186	$	1,269,672

_________________________________________________________________________________________

(1)Includes Service revenue - fee based, Service revenue - product based, and Product sales.

(2)The significant expense categories and amounts align with the information that is regularly provided to the CODM.

(3)General and administrative expense as presented in the consolidated statements of operations less non-cash equity-based compensation expense and non-cash amortization of cloud-computing arrangements.

(4)Includes interest income earned on cash and cash equivalent balances.

(5)Other includes: (i) Cost of product, (ii) Non-cash equity-based compensation expense, (iii) non-cash amortization of cloud-computing arrangements, (iv) Property and other taxes, (v) Long-lived asset and other impairments, (vi) Gain (loss) on divestiture and other, net, and (vii) Gain (loss) on early extinguishment of debt.

The CODM uses consolidated total assets as the measure of the Partnership’s single reportable segment assets. As of September 30, 2025, and December 31, 2024, the consolidated balance sheets included $12.1 billion and $13.1 billion, respectively, of total assets, which includes $510.6 million and $541.4 million of assets related to equity investments as of September 30, 2025, and December 31, 2024, respectively.

Capital expenditures for additions to long-lived assets were $505.8 million and $595.1 million for the nine months ended September 30, 2025 and 2024, respectively.

12. SUBSEQUENT EVENT

Aris. On October 15, 2025, the Partnership closed on the acquisition of Aris by merger in an equity-and-cash transaction valued at $1.5 billion, plus Aris’s outstanding debt of approximately $500 million of senior notes. Based on Aris shareholder consideration elections, the Partnership issued approximately 26.6 million common units and paid $415.0 million in cash, funded with borrowings under the commercial paper program. Due to the timing of the closing of the transactions, the initial purchase price accounting was not yet completed at the time of filing.

Aris’s water infrastructure assets, located in Lea and Eddy Counties, New Mexico and West Texas, include approximately 790 miles of produced-water pipeline, 1,800 MBbls/d of produced-water handling capacity, 1,400 MBbls/d of water recycling capacity, and 625,000 dedicated acres.

Table of Contents

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion analyzes our financial condition and results of operations and should be read in conjunction with the Consolidated Financial Statements and Notes to Consolidated Financial Statements, wherein WES Operating is fully consolidated, and which are included under Part I, Item 1 of this quarterly report, and the historical consolidated financial statements, and the notes thereto, which are included under Part II, Item 8 of the 2024 Form 10-K as filed with the SEC on February 26, 2025.

The Partnership’s assets include assets owned and ownership interests accounted for by us under the equity method of accounting, through our 98.0% partnership interest in WES Operating, as of September 30, 2025 (see Note 7—Equity Investments in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q). We also own and control the entire non-economic general partner interest in WES Operating GP, and our general partner is owned by Occidental.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

We have made in this Form 10-Q, and may make in other public filings, press releases, and statements by management, forward-looking statements concerning our operations, economic performance, and financial condition. These forward-looking statements include statements preceded by, followed by, or that otherwise include the words “believes,” “expects,” “anticipates,” “intends,” “estimates,” “projects,” “target,” “goal,” “plans,” “objective,” “should,” or similar expressions or variations on such expressions. These statements discuss future expectations, contain projections of results of operations or financial condition, or include other “forward-looking” information.

Although we and our general partner believe that the expectations reflected in our forward-looking statements are reasonable, neither we nor our general partner can provide any assurance that such expectations will prove correct. These forward-looking statements involve risks and uncertainties. Important factors that could cause actual results to differ materially from expectations include, but are not limited to, the following:

•our ability to pay distributions to our unitholders and the amount of such distributions;

•our assumptions about the energy market;

•future throughput (including Occidental production) that is gathered or processed by, or transported through, our assets;

•our operating results;

•competitive conditions;

•technology;

•the availability of capital resources to fund acquisitions, capital expenditures, and other contractual obligations, and our ability to access financing through the debt or equity capital markets;

•the supply of, demand for, and price of oil, natural gas, NGLs, and related products or services;

•commodity-price risks inherent in percent-of-proceeds, percent-of-product, keep-whole, and fixed-recovery processing contracts;

•weather and natural disasters;

•inflation;

•the availability of goods and services;

•general economic conditions, internationally, domestically, or in the jurisdictions in which we are doing business;

•federal, state, and local laws and state-approved voter ballot initiatives, including those laws or ballot initiatives that limit producers’ hydraulic-fracturing activities or other oil and natural-gas development or operations;

•environmental liabilities;

•legislative or regulatory changes, including changes affecting our status as a partnership for federal income tax purposes;

•changes in the financial or operational condition of Occidental;

Table of Contents

•the creditworthiness of Occidental or our other counterparties, including financial institutions, operating partners, and other parties;

•changes in Occidental’s capital program, corporate strategy, or other desired areas of focus;

•our commitments to capital projects;

•our ability to access liquidity under the RCF and commercial paper program;

•our ability to repay debt;

•the resolution of litigation or other disputes;

•conflicts of interest among us and our general partner and its related parties, including Occidental, with respect to, among other things, the allocation of capital and operational and administrative costs, and our future business opportunities;

•our ability to maintain and/or obtain rights to operate our assets on land owned by third parties;

•our ability to acquire assets on acceptable terms from third parties;

•non-payment or non-performance of significant customers, including under gathering, processing, transportation, and disposal agreements;

•the timing, amount, and terms of future issuances of equity and debt securities;

•the outcome of pending and future regulatory, legislative, or other proceedings or investigations, and continued or additional disruptions in operations that may occur as we and our customers comply with any regulatory orders or other state or local changes in laws or regulations;

•cyber-attacks or security breaches; and

•other factors discussed below, in “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Estimates” included in the 2024 Form 10-K, in our quarterly reports on Form 10-Q, and in our other public filings and press releases.

Risk factors and other factors noted throughout or incorporated by reference in this Form 10-Q could cause actual results to differ materially from those contained in any forward-looking statement. Except as required by law, we undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise.

Table of Contents

EXECUTIVE SUMMARY

We are a midstream energy company organized as a publicly traded partnership, engaged in the business of gathering, compressing, treating, processing, and transporting natural gas; gathering, stabilizing, and transporting condensate, NGLs, and crude oil; and gathering, transporting, recycling, treating, and disposing of produced water. In our capacity as a natural-gas processor, we also buy and sell residue, NGLs, and condensate on behalf of ourselves and our customers under certain contracts. To provide superior midstream service, we focus on ensuring the reliability and performance of our systems, creating sustainable cost efficiencies, enhancing our safety culture, and protecting the environment. We own or have investments in assets located in Texas, New Mexico, and the Rocky Mountains (Colorado, Utah, and Wyoming). As of September 30, 2025, our assets and investments consisted of the following:


	Wholly Owned and Operated	Operated Interests	Equity Interests
Gathering systems (1)	18	2	1
Treating facilities	43	3	—
Processing plants/trains	27	3	1
NGLs pipelines	3	—	4
Natural-gas pipelines	6	—	1
Crude-oil pipelines	2	1	1

_________________________________________________________________________________________

(1)Includes the DBM water systems.

Significant financial and operational events during the nine months ended September 30, 2025, included the following:

•WES Operating retired the total principal amount outstanding of the 3.100% Senior Notes due 2025 at par value during the first quarter of 2025 and the 3.950% Senior Notes due 2025 at par value during the second quarter of 2025.

•Our third-quarter 2025 per-unit distribution is unchanged from the second-quarter 2025 per-unit distribution of $0.910.

•Completed the start-up of the North Loving plant in late-February 2025, increasing gas processing capacity at the West Texas complex by 250 MMcf/d to a total of 2,190 MMcf/d.

Table of Contents

The following table provides additional information on throughput for the periods presented below:




	Three Months Ended				Nine Months Ended

	September 30, 2025	June 30, 2025	Inc/ (Dec)		September 30, 2025	September 30, 2024	Inc/ (Dec)
Throughput for natural-gas assets (MMcf/d)
Delaware Basin	2,113	2,104	—	%	2,065	1,836	12	%
DJ Basin	1,497	1,447	3	%	1,449	1,414	2	%
Powder River Basin	424	479	(11)	%	455	446	2	%
Equity investments	553	575	(4)	%	559	507	10	%
Other	962	828	16	%	897	967	(7)	%
Total throughput for natural-gas assets	5,549	5,433	2	%	5,425	5,170	5	%

Throughput for crude-oil and NGLs assets (MBbls/d)
Delaware Basin	245	269	(9)	%	257	237	8	%
DJ Basin	105	96	9	%	99	88	13	%
Powder River Basin	27	28	(4)	%	27	24	13	%
Equity investments	102	112	(9)	%	105	152	(31)	%
Other	41	38	8	%	37	39	(5)	%
Total throughput for crude-oil and NGLs assets	520	543	(4)	%	525	540	(3)	%

Throughput for produced-water assets (MBbls/d)
Delaware Basin	1,242	1,242	—	%	1,225	1,124	9	%



Total throughput for produced-water assets	1,242	1,242	—	%	1,225	1,124	9	%

Table of Contents

OUTLOOK

We expect our business to be affected by the below-described key trends and uncertainties. Our expectations are based on assumptions made by us and information currently available to us. To the extent our underlying assumptions about, or interpretations of, available information prove incorrect, our actual results may vary materially from expected results.

Impact of producer activity. Our business is primarily driven by the level of production of crude oil and natural gas by producers in our areas of operation. This activity, however, can be impacted negatively by, among other things, commodity-price fluctuations and operational challenges. Fluctuating crude-oil, natural-gas, and NGLs prices can reduce the level of our customers’ activities and change the allocation of capital within their own asset portfolios. Such fluctuations can also impact us directly to the extent we take ownership of and sell certain volumes at the tailgate of our plants for our own account. The New York Mercantile Exchange West Texas Intermediate crude-oil daily settlement prices during 2024, ranged from a low of $65.75 per barrel in September 2024 to a high of $86.91 per barrel in April 2024, and prices during the nine months ended September 30, 2025, ranged from a low of $57.13 per barrel in May 2025 to a high of $80.04 per barrel in January 2025. The Waha Hub natural-gas prices during 2024, ranged from a low of ($6.23) per MMBtu in August 2024 to a high of $8.27 per MMBtu in January 2024, and prices during the nine months ended September 30, 2025, ranged from a low of ($2.77) per MMBtu in September 2025 to a high of $7.50 per MMBtu in January 2025. The extent and duration of commodity-price volatility, and the associated direct and indirect impact on our business, cannot be predicted. To address the risks posed by fluctuating commodity prices, we intend to continue evaluating the relevant price environments and adjust our capital spending plans to reflect our customers’ anticipated activity levels, while maintaining appropriate liquidity and financial flexibility.

Additionally, even in favorable commodity-price environments, our customers face operational challenges such as severe weather disruptions, oil and gas takeaway constraints, produced water recycling and disposal limitations, seismicity concerns, new regulatory requirements, and optimizing large, complex drilling programs. Our producers’ ability to mitigate or manage such challenges can significantly impact the volumes available for us to service in the short term. For this reason, we strive to work proactively with our customers whenever possible to provide high levels of reliability on our systems and help them meet these operational challenges as they arise.

Impact of inflation and tariffs. High inflation in the U.S. has raised our costs for steel products, automation components, power supply, labor, materials, fuel, and services, raising operating costs and capital expenditures. Additionally, the Trump administration has imposed significant import tariffs, including on imports of steel and aluminum, and may impose further tariffs on other U.S. trading partners. These tariffs could substantially increase our operating and capital costs. While future inflation and tariff impacts are uncertain, higher operating and capital costs could materially and negatively affect financial results. To the extent permitted by regulations and escalation provisions in certain of our existing agreements, we have the ability to recover a portion of increased costs in the form of higher fees.

Impact of interest rates. Interest rates can be volatile, affecting our interest expense on RCF and commercial paper borrowings. Future increased interest rates would likely result in additional increases in financing costs. As with other yield-oriented securities, our unit price could be impacted by our implied distribution yield relative to market interest rates. Therefore, changes in interest rates may affect investor yield requirements. A rising interest-rate environment could have an adverse impact on our unit price and ability to issue equity to make acquisitions, to reduce debt, or for other purposes. However, we expect our cost of capital to remain competitive, as our peers face similar interest-rate dynamics.

Table of Contents

ACQUISITIONS AND DIVESTITURES

During the second quarter of 2024, we closed on the sale of our 33.75% interest in the Marcellus Interest systems. During the first quarter of 2024, we closed on the sale of the following equity investments to third parties: (i) the 25.00% interest in Mont Belvieu JV, (ii) the 20.00% interest in Whitethorn LLC, (iii) the 15.00% interest in Panola, and (iv) the 20.00% interest in Saddlehorn. See Note 3—Acquisitions and Divestitures under Part I, Item 1 of this Form 10-Q.

RESULTS OF OPERATIONS

OPERATING RESULTS

The following tables and discussion present a summary of our results of operations:




	Three Months Ended				Nine Months Ended

thousands	September 30, 2025		June 30, 2025		September 30, 2025		September 30, 2024
Total revenues and other (1)	$	952,484	$	942,322	$	2,811,922	$	2,676,720
Equity income, net – related parties	16,847		27,128		64,410		84,227
Total operating expenses (1)	525,301		524,060		1,572,442		1,515,384
Gain (loss) on divestiture and other, net	(2,470)		(911)		(8,048)		299,426
Operating income (loss)	441,560		444,479		1,295,842		1,544,989
Interest expense	(92,353)		(95,170)		(284,816)		(279,177)
Gain (loss) on early extinguishment of debt	—		—		—		5,403
Other income (expense), net	1,754		3,692		12,923		16,124
Income (loss) before income taxes	350,961		353,001		1,023,949		1,287,339
Income tax expense (benefit)	2,089		2,239		7,763		17,667
Net income (loss)	348,872		350,762		1,016,186		1,269,672
Net income (loss) attributable to noncontrolling interests	9,257		9,082		25,884		29,714
Net income (loss) attributable to Western Midstream Partners, LP (2)	$	339,615	$	341,680	$	990,302	$	1,239,958

_________________________________________________________________________________________

(1)Total revenues and other includes amounts earned from services provided to related parties and from the sale of natural gas, condensate, and NGLs to related parties. Total operating expenses includes amounts charged by related parties for services received. See Note 6—Related-Party Transactions in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

(2)For reconciliations to comparable consolidated results of WES Operating, see Items Affecting the Comparability of Financial Results with WES Operating within this Item 2.

For purposes of the following discussion, any increases or decreases “for the three months ended September 30, 2025” refer to the comparison of the three months ended September 30, 2025, to the three months ended June 30, 2025; and any increases or decreases “for the nine months ended September 30, 2025” refer to the comparison of the nine months ended September 30, 2025, to the nine months ended September 30, 2024.

Table of Contents

Throughput




	Three Months Ended				Nine Months Ended

	September 30, 2025	June 30, 2025	Inc/(Dec)		September 30, 2025	September 30, 2024	Inc/(Dec)
Throughput for natural-gas assets (MMcf/d)
Gathering, treating, and transportation	394	354	11	%	373	477	(22)	%
Processing	4,602	4,504	2	%	4,493	4,186	7	%
Equity investments (1)	553	575	(4)	%	559	507	10	%
Total throughput	5,549	5,433	2	%	5,425	5,170	5	%
Throughput attributable to noncontrolling interests (2)	191	182	5	%	184	172	7	%
Total throughput attributable to WES for natural-gas assets	5,358	5,251	2	%	5,241	4,998	5	%
Throughput for crude-oil and NGLs assets (MBbls/d)
Gathering, treating, and transportation	418	431	(3)	%	420	388	8	%
Equity investments (1)	102	112	(9)	%	105	152	(31)	%
Total throughput	520	543	(4)	%	525	540	(3)	%
Throughput attributable to noncontrolling interests (2)	10	11	(9)	%	10	11	(9)	%
Total throughput attributable to WES for crude-oil and NGLs assets	510	532	(4)	%	515	529	(3)	%
Throughput for produced-water assets (MBbls/d)
Gathering and disposal	1,242	1,242	—	%	1,225	1,124	9	%
Throughput attributable to noncontrolling interests (2)	25	25	—	%	24	22	9	%
Total throughput attributable to WES for produced-water assets	1,217	1,217	—	%	1,201	1,102	9	%

_________________________________________________________________________________________

(1)Represents our share of average throughput for investments accounted for under the equity method of accounting.

(2)Includes (i) the 2.0% limited partner interest in WES Operating owned by an Occidental subsidiary and (ii) for natural-gas assets, the 25% third-party interest in Chipeta, which collectively represent WES’s noncontrolling interests.

Natural-gas assets

Total throughput attributable to WES for natural-gas assets increased by 107 MMcf/d for the three months ended September 30, 2025, primarily due to (i) higher volumes at the Brasada complex and Springfield gas-gathering system due to downtime during the second quarter of 2025, (ii) higher volumes at the DJ Basin and Chipeta complexes due to increased production in the areas, (iii) higher volumes at the MIGC system due to certain temporary customer constraints during the second quarter of 2025, and (iv) higher volumes on the Red Bluff Express pipeline. These increases were offset partially by (i) a decrease in previously onloaded volumes at the Powder River Basin complex and (ii) lower volumes at the Mi Vida plant.

Total throughput attributable to WES for natural-gas assets increased by 243 MMcf/d for the nine months ended September 30, 2025, primarily due to (i) higher volumes at the West Texas, DJ Basin, and Chipeta complexes due to increased production in the areas, and (ii) higher volumes on the Red Bluff Express pipeline due to the addition of a new receipt point into the pipeline beginning in November 2024. These increases were offset partially by (i) lower volumes at the Marcellus Interest systems due to the sale of the asset during the second quarter of 2024 and (ii) lower volumes at the Springfield gas-gathering system due to decreased production in the area and downtime during the second quarter of 2025.

Table of Contents

Crude-oil and NGLs assets

Total throughput attributable to WES for crude-oil and NGLs assets decreased by 22 MBbls/d for the three months ended September 30, 2025, primarily due to lower volumes at the DBM oil system due to decreased production in the area.

Total throughput attributable to WES for crude-oil and NGLs assets decreased by 14 MBbls/d for the nine months ended September 30, 2025, primarily due to (i) the divestiture of Whitethorn LLC and Saddlehorn in the first quarter of 2024 and (ii) lower volumes on the TEP pipeline. These decreases were offset partially by higher volumes at the DBM oil system due to increased production in the area.

Produced-water assets

Total throughput attributable to WES for produced-water assets increased by 99 MBbls/d for the nine months ended September 30, 2025, due to higher production.

Revenues




	Three Months Ended						Nine Months Ended

thousands except percentages and per-unit amounts	September 30, 2025		June 30, 2025		Inc/(Dec)		September 30, 2025		September 30, 2024		Inc/(Dec)
Service revenues – fee based	$	868,253	$	851,419	2	%	$	2,542,869	$	2,389,366	6	%

Other revenues from customers
Service revenues – product based	$	33,919	$	50,442	(33)	%	$	143,613	$	177,321	(19)	%
Product sales	50,129		40,280		24	%	124,878		109,076		14	%
Total other revenues from customers	$	84,048	$	90,722	(7)	%	$	268,491	$	286,397	(6)	%

Per-unit gross average sales price:
Natural gas (per Mcf)	$	0.67	$	1.06	(37)	%	$	1.26	$	0.36	NM
NGLs (per Bbl)	24.18		24.85		(3)	%	26.55		28.55		(7)	%

_________________________________________________________________________________________

NM—Not meaningful

Service revenues – fee based

Service revenues – fee based increased by $16.8 million for the three months ended September 30, 2025, primarily due to an increase of $8.9 million at the DJ Basin complex due to increased throughput.

Service revenues – fee based increased by $153.5 million for the nine months ended September 30, 2025, primarily due to increases of (i) $94.8 million at the West Texas complex, $12.3 million at the DJ Basin complex, $10.7 million at the Powder River Basin complex, and $7.4 million at the Chipeta complex, all primarily due to increased throughput, (ii) $26.4 million at the DBM oil system due to increased throughput and deficiency fees on certain contracts with increasing throughput minimums, and (iii) $16.7 million at the DBM water systems due to increased throughput, partially offset by a change in contract terms effective January 1, 2025. These increases were offset partially by decreases of (i) $11.0 million at the Marcellus Interest systems due to the sale of the asset during the second quarter of 2024 and (ii) $8.4 million at the Springfield systems primarily due to decreased throughput.

Other revenues from customers

Other revenues from customers decreased by $6.7 million for the three months ended September 30, 2025, primarily due to a decrease of $12.8 million at the West Texas complex due to decreased product recoveries and average prices, partially offset by an increase of $2.9 million at the DJ Basin complex due to increased volumes sold.

Other revenues from customers decreased by $17.9 million for the nine months ended September 30, 2025, primarily due to (i) $31.1 million and $5.4 million at the DJ Basin and Granger complexes, respectively, due to decreased volumes sold and average prices and (ii) $7.0 million at the Chipeta complex due to contract changes effective during the third quarter of 2024. These decreases were offset partially by an increase of $24.9 million at the West Texas complex due to increased average prices and volumes sold.

Table of Contents

Equity Income, Net – Related Parties




	Three Months Ended						Nine Months Ended

thousands except percentages	September 30, 2025		June 30, 2025		Inc/(Dec)		September 30, 2025		September 30, 2024		Inc/(Dec)
Equity income, net – related parties	$	16,847	$	27,128	(38)	%	$	64,410	$	84,227	(24)	%

Equity income, net – related parties decreased by $10.3 million for the three months ended September 30, 2025, primarily due to a decrease of $4.1 million at Mi Vida.

Equity income, net – related parties decreased by $19.8 million for the nine months ended September 30, 2025, primarily due to decreases of $6.0 million at TEP and $5.5 million resulting from the sale of several equity investments to third parties in the first quarter of 2024. See Note 3—Acquisitions and Divestitures in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

Cost of Product and Operation and Maintenance Expenses




	Three Months Ended						Nine Months Ended

thousands except percentages	September 30, 2025		June 30, 2025		Inc/(Dec)		September 30, 2025		September 30, 2024		Inc/(Dec)
Natural-gas purchases	$	7,210	$	5,180	39	%	$	26,407	$	5,594	NM
NGLs purchases	50,846		63,301		(20)	%	174,565		194,603		(10)	%
Other	(6,869)		(25,800)		73	%	(65,612)		(67,261)		2	%
Cost of product	51,187		42,681		20	%	135,360		132,936		2	%
Operation and maintenance	212,385		224,629		(5)	%	663,528		649,324		2	%
Total Cost of product and Operation and maintenance expenses	$	263,572	$	267,310	(1)	%	$	798,888	$	782,260	2	%

Natural-gas purchases

Natural-gas purchases increased by $20.8 million for the nine months ended September 30, 2025, primarily due to higher average prices at the West Texas complex.

NGLs purchases

NGLs purchases decreased by $12.5 million for the three months ended September 30, 2025, primarily due to a decrease of $11.7 million at the West Texas complex due to decreased product recoveries.

NGLs purchases decreased by $20.0 million for the nine months ended September 30, 2025, primarily due to decreases of (i) $13.6 million at the DJ Basin complex due to lower purchased volumes and average prices, and (ii) $5.9 million at the Chipeta complex due to contract changes effective during the third quarter of 2024.

Other items

Other items increased by $18.9 million for the three months ended September 30, 2025, primarily due to changes in imbalance positions at the West Texas and Chipeta complexes.

Table of Contents

Operation and maintenance expense

Operation and maintenance expense decreased by $12.2 million for the three months ended September 30, 2025, primarily due to decreases of (i) $7.2 million in equipment and maintenance costs and (ii) $5.6 million in chemicals and treating services.

Operation and maintenance expense increased by $14.2 million for the nine months ended September 30, 2025, primarily due to increases of (i) $15.5 million in utility expense, (ii) $5.9 million in land-related costs, (iii) $5.7 million in salaries and wages costs, and (iv) $5.5 million in equipment and maintenance costs. These increases were offset partially by decreases of (i) $7.2 million in contract labor and consulting costs and (ii) $5.7 million in chemicals and treating services.

Other Operating Expenses




	Three Months Ended						Nine Months Ended

thousands except percentages	September 30, 2025		June 30, 2025		Inc/(Dec)		September 30, 2025		September 30, 2024		Inc/(Dec)
General and administrative	$	64,119	$	66,146	(3)	%	$	197,051	$	195,498	1	%
Property and other taxes	15,725		17,805		(12)	%	51,356		43,984		17	%
Depreciation and amortization	170,323		172,113		(1)	%	512,896		487,438		5	%
Long-lived asset and other impairments	11,562		686		NM		12,251		6,204		97	%

Total other operating expenses	$	261,729	$	256,750	2	%	$	773,554	$	733,124	6	%

Depreciation and amortization expense

Depreciation and amortization expense increased by $25.5 million for the nine months ended September 30, 2025, primarily due to capital projects being placed into service at the West Texas complex.

Property and other taxes

Property and other taxes increased by $7.4 million for the nine months ended September 30, 2025, primarily due to a higher ad valorem property tax accrual at the DJ Basin complex and DJ Basin oil system.

Long-lived asset and other impairment expense

Long-lived asset and other impairment expense increased by $10.9 million and $6.0 million for the three and nine months ended September 30, 2025, respectively, primarily due to a $9.9 million impairment at the Granger complex.

Table of Contents

Interest Expense




	Three Months Ended						Nine Months Ended

thousands except percentages	September 30, 2025		June 30, 2025		Inc/(Dec)		September 30, 2025		September 30, 2024		Inc/(Dec)
Long-term and short-term debt	$	(91,240)	$	(93,348)	(2)	%	$	(280,648)	$	(278,361)	1	%
Finance lease liabilities	(533)		(557)		(4)	%	(1,673)		(1,964)		(15)	%
Commitment fees and amortization of debt-related costs	(2,917)		(3,045)		(4)	%	(9,163)		(9,929)		(8)	%
Capitalized interest	2,337		1,780		31	%	6,668		11,077		(40)	%
Interest expense	$	(92,353)	$	(95,170)	(3)	%	$	(284,816)	$	(279,177)	2	%

Interest expense increased by $5.6 million for the nine months ended September 30, 2025, primarily due to increases of (i) $28.2 million of interest incurred on the 5.450% Senior Notes due 2034 that were issued during the third quarter of 2024 and (ii) $4.4 million due to lower capitalized interest. These increases were offset partially by decreases of (i) $19.3 million due to senior note repayments during 2025 and (ii) $5.4 million due to lower outstanding borrowings on the commercial paper program during 2025. See Liquidity and Capital Resources—Debt and credit facilities within this Item 2.

Income Tax Expense (Benefit)

We are not a taxable entity for U.S. federal income tax purposes; therefore, our federal statutory rate is zero percent. However, income apportionable to Texas is subject to Texas margin tax. Income tax expense decreased by $9.9 million for the nine months ended September 30, 2025, primarily due to a revaluation increasing the deferred tax liability balance in 2024 resulting from a state margin rate increase associated with no longer being included in Occidental’s affiliated group tax return beginning in September 2024 following Occidental’s sale of 19.5 million WES common units in August 2024 and the resulting decrease in WES ownership, inclusive of its ownership in WES Operating.

Table of Contents

RECONCILIATION OF NON-GAAP FINANCIAL MEASURES

Adjusted Gross Margin. We define Adjusted Gross Margin attributable to Western Midstream Partners, LP (“Adjusted Gross Margin”) as total revenues and other (less reimbursements for electricity-related expenses recorded as revenue), less cost of product, plus distributions from equity investments, and excluding the noncontrolling interest owners’ proportionate share of revenues and cost of product. We believe Adjusted Gross Margin is an important performance measure of our operations’ profitability and performance as compared to other companies in the midstream industry. Cost of product expenses include (i) costs associated with the purchase of natural gas and NGLs pursuant to our percent-of-proceeds, percent-of-product, and keep-whole contracts, (ii) costs associated with the valuation of gas and NGLs imbalances, (iii) costs associated with our obligations under certain contracts to redeliver a volume of natural gas to shippers, which is thermally equivalent to condensate retained by us and sold to third parties, and (iv) costs associated with our offload commitments with third parties providing firm-processing capacity. The electricity-related expenses included in our Adjusted Gross Margin definition relate to pass-through expenses that are recorded as Operation and maintenance expense with an offset recorded as revenue for the reimbursement by certain customers.

Adjusted EBITDA. We define Adjusted EBITDA attributable to Western Midstream Partners, LP (“Adjusted EBITDA”) as net income (loss), plus (i) distributions from equity investments, (ii) non-cash equity-based compensation expense, (iii) interest expense, (iv) income tax expense, (v) depreciation and amortization, (vi) impairments, and (vii) other expense (including lower of cost or market inventory adjustments recorded in cost of product), less (i) gain (loss) on divestiture and other, net, (ii) gain (loss) on early extinguishment of debt, (iii) income from equity investments, (iv) income tax benefit, (v) other income, (vi) other items impacting comparability with our core operating performance, and (vii) the noncontrolling interest owners’ proportionate share of revenues and expenses. We believe the presentation of Adjusted EBITDA provides information useful to investors in assessing our financial condition and results of operations and that Adjusted EBITDA is a widely accepted financial indicator of a company’s ability to incur and service debt, fund capital expenditures, and make distributions. Adjusted EBITDA is a supplemental financial measure that management and external users of our consolidated financial statements, such as industry analysts, investors, commercial banks, and rating agencies, use, among other measures, to assess the following:

•our operating performance as compared to other publicly traded partnerships in the midstream industry, without regard to financing methods, capital structure, or historical cost basis;

•the ability of our assets to generate cash flow to make distributions; and

•the viability of acquisitions and capital expenditures and the returns on investment of various investment opportunities.

Free Cash Flow. We define “Free Cash Flow” as net cash provided by operating activities less total capital expenditures and contributions to equity investments, plus distributions from equity investments in excess of cumulative earnings. Management considers Free Cash Flow an appropriate metric for assessing capital discipline, cost efficiency, and balance-sheet strength. Although Free Cash Flow is the metric used to assess our ability to make distributions to unitholders, this measure should not be viewed as indicative of the actual amount of cash that is available for distributions or planned for distributions for a given period. Instead, Free Cash Flow represents the amount of cash that is available in aggregate for distributions, debt repayments, and other general partnership purposes.

Table of Contents

Adjusted Gross Margin, Adjusted EBITDA, and Free Cash Flow are not defined in GAAP. The GAAP measure that is most directly comparable to Adjusted Gross Margin is gross margin. Net income (loss) and net cash provided by operating activities are the GAAP measures that are most directly comparable to Adjusted EBITDA. The GAAP measure that is most directly comparable to Free Cash Flow is net cash provided by operating activities. Our non-GAAP financial measures (i) should not be considered as alternatives to the comparable GAAP measures or any other measure of financial performance presented in accordance with GAAP, (ii) have important limitations as analytical tools because they exclude some, but not all, items that affect the comparable GAAP measures, (iii) should not be considered in isolation or as a substitute for analysis of our results as reported under GAAP, and (iv) may not be comparable to similarly titled measures of other companies in our industry, thereby diminishing their utility as comparative measures.

Management compensates for the limitations of our non-GAAP measures as analytical tools by reviewing the comparable GAAP measures, understanding the differences, and incorporating this knowledge into its decision-making processes. We believe that investors benefit from having access to the same financial measures that our management considers in evaluating our operating results.

The following tables present reconciliations of the GAAP measure to our non-GAAP measures:




	Three Months Ended				Nine Months Ended

thousands	September 30, 2025		June 30, 2025		September 30, 2025		September 30, 2024
Reconciliation of Gross margin to Adjusted Gross Margin
Total revenues and other	$	952,484	$	942,322	$	2,811,922	$	2,676,720
Less:
Cost of product	51,187		42,681		135,360		132,936
Depreciation and amortization	170,323		172,113		512,896		487,438
Gross margin	730,974		727,528		2,163,666		2,056,346
Add:
Distributions from equity investments	29,751		31,122		95,217		110,651
Depreciation and amortization	170,323		172,113		512,896		487,438
Less:
Reimbursed electricity-related charges recorded as revenues	34,803		30,256		94,063		86,072
Adjusted Gross Margin attributable to noncontrolling interests (1)	21,342		21,439		62,962		59,967
Adjusted Gross Margin	$	874,903	$	879,068	$	2,614,754	$	2,508,396

_________________________________________________________________________________________

(1)Includes (i) the 25% third-party interest in Chipeta and (ii) the 2.0% limited partner interest in WES Operating owned by an Occidental subsidiary, which collectively represent WES’s noncontrolling interests.

Table of Contents

To facilitate investor and industry analysis, we also disclose per-Mcf Adjusted Gross Margin for natural-gas assets, per-Bbl Adjusted Gross Margin for crude-oil and NGLs assets, and per-Bbl Adjusted Gross Margin for produced-water assets.






	Three Months Ended				Nine Months Ended

thousands except per-unit amounts	September 30, 2025		June 30, 2025		September 30, 2025		September 30, 2024
Gross margin
Gross margin for natural-gas assets (1)	$	540,393	$	539,462	$	1,606,999	$	1,539,081
Gross margin for crude-oil and NGLs assets (1)	107,877		106,839		315,991		287,627
Gross margin for produced-water assets (1)	90,837		89,341		264,754		250,565
Per-Mcf Gross margin for natural-gas assets (2)	1.06		1.09		1.09		1.09
Per-Bbl Gross margin for crude-oil and NGLs assets (2)	2.25		2.16		2.20		1.95
Per-Bbl Gross margin for produced-water assets (2)	0.80		0.79		0.79		0.81
Adjusted Gross Margin
Adjusted Gross Margin for natural-gas assets	$	623,691	$	629,093	$	1,871,236	$	1,795,065
Adjusted Gross Margin for crude-oil and NGLs assets	145,463		146,128		435,066		423,416
Adjusted Gross Margin for produced-water assets	105,749		103,847		308,452		289,915
Per-Mcf Adjusted Gross Margin for natural-gas assets (3)	1.27		1.32		1.31		1.31
Per-Bbl Adjusted Gross Margin for crude-oil and NGLs assets (3)	3.10		3.02		3.09		2.92
Per-Bbl Adjusted Gross Margin for produced-water assets (3)	0.94		0.94		0.94		0.96

_________________________________________________________________________________________

(1)Excludes corporate-level depreciation and amortization.

(2)Average for period. Calculated as Gross margin for natural-gas assets, crude-oil and NGLs assets, or produced-water assets, divided by the respective total throughput (MMcf or MBbls) for natural-gas assets, crude-oil and NGLs assets, or produced-water assets.

(3)Average for period. Calculated as Adjusted Gross Margin for natural-gas assets, crude-oil and NGLs assets, or produced-water assets, divided by the respective total throughput (MMcf or MBbls) attributable to WES for natural-gas assets, crude-oil and NGLs assets, or produced-water assets.

Table of Contents




	Three Months Ended				Nine Months Ended

thousands	September 30, 2025		June 30, 2025		September 30, 2025		September 30, 2024
Reconciliation of Net income (loss) to Adjusted EBITDA
Net income (loss)	$	348,872	$	350,762	$	1,016,186	$	1,269,672
Add:
Distributions from equity investments	29,751		31,122		95,217		110,651
Non-cash equity-based compensation expense	10,456		10,713		29,417		28,573
Interest expense	92,353		95,170		284,816		279,177
Income tax expense	2,089		2,239		7,763		17,667
Depreciation and amortization	170,323		172,113		512,896		487,438
Long-lived asset and other impairments	11,562		686		12,251		6,204
Other expense	53		43		286		239
Less:
Gain (loss) on divestiture and other, net	(2,470)		(911)		(8,048)		299,426
Gain (loss) on early extinguishment of debt	—		—		—		5,403
Equity income, net – related parties	16,847		27,128		64,410		84,227
Other income	1,754		3,692		12,923		16,124

Adjusted EBITDA attributable to noncontrolling interests (1)	15,576		15,063		44,347		41,102
Adjusted EBITDA	$	633,752	$	617,876	$	1,845,200	$	1,753,339
Reconciliation of Net cash provided by operating activities to Adjusted EBITDA
Net cash provided by operating activities	$	570,210	$	563,977	$	1,664,980	$	1,582,414
Interest (income) expense, net	92,353		95,170		284,816		279,177
Accretion and amortization of long-term obligations, net	(1,896)		(2,032)		(6,130)		(6,884)
Current income tax expense (benefit)	1,865		1,940		5,527		3,489
Other (income) expense, net	(1,754)		(3,692)		(12,923)		(16,124)

Distributions from equity investments in excess of cumulative earnings – related parties	11,953		3,040		26,000		27,560
Changes in assets and liabilities:
Accounts receivable, net	(21,956)		31,425		(19,165)		12,595
Accounts and imbalance payables and accrued liabilities, net	40,837		(31,039)		56,482		78,884
Other items, net	(42,284)		(25,850)		(110,040)		(166,670)
Adjusted EBITDA attributable to noncontrolling interests (1)	(15,576)		(15,063)		(44,347)		(41,102)
Adjusted EBITDA	$	633,752	$	617,876	$	1,845,200	$	1,753,339
Cash flow information
Net cash provided by operating activities	$	570,210	$	563,977	$	1,664,980	$	1,582,414
Net cash (used in) provided by investing activities	(161,528)		(173,974)		(476,292)		191,153
Net cash used in financing activities	(361,126)		(708,718)		(2,101,864)		(921,617)

_________________________________________________________________________________________

Table of Contents




	Three Months Ended				Nine Months Ended

thousands	September 30, 2025		June 30, 2025		September 30, 2025		September 30, 2024
Reconciliation of Net cash provided by operating activities to Free Cash Flow
Net cash provided by operating activities	$	570,210	$	563,977	$	1,664,980	$	1,582,414
Less:
Capital expenditures	184,758		178,623		505,783		595,087

Add:
Distributions from equity investments in excess of cumulative earnings — related parties	11,953		3,040		26,000		27,560
Free Cash Flow	$	397,405	$	388,394	$	1,185,197	$	1,014,887
Cash flow information
Net cash provided by operating activities	$	570,210	$	563,977	$	1,664,980	$	1,582,414
Net cash (used in) provided by investing activities	(161,528)		(173,974)		(476,292)		191,153
Net cash used in financing activities	(361,126)		(708,718)		(2,101,864)		(921,617)

Gross margin. Refer to Operating Results within this Item 2 for a discussion of the components of Gross margin as compared to the prior periods, including Revenues, Cost of Product (Natural-gas purchases, NGLs purchases, and Other items), and Other Operating Expenses (Depreciation and amortization expense).

Gross margin increased by $107.3 million for the nine months ended September 30, 2025, primarily due to a $135.2 million increase in total revenues and other, partially offset by a $25.5 million increase in depreciation and amortization.

Net income (loss). Refer to Operating Results within this Item 2 for a discussion of the primary components of Net income (loss) as compared to the prior periods.

Net income (loss) decreased by $253.5 million for the nine months ended September 30, 2025, primarily due to (i) a $307.5 million decrease in gain (loss) on divestiture and other, net and (ii) a $57.1 million increase in total operating expenses. These amounts were offset partially by a $135.2 million increase in total revenues and other.

Net cash provided by operating activities. Refer to Historical cash flow within this Item 2 for a discussion of the primary components of Net cash provided by operating activities as compared to the prior periods.

Table of Contents

KEY PERFORMANCE METRICS




	Three Months Ended						Nine Months Ended

thousands except percentages and per-unit amounts	September 30, 2025		June 30, 2025		Inc/(Dec)		September 30, 2025		September 30, 2024		Inc/(Dec)
Adjusted Gross Margin	$	874,903	$	879,068	—	%	$	2,614,754	$	2,508,396	4	%
Per-Mcf Adjusted Gross Margin for natural-gas assets (1)	1.27		1.32		(4)	%	1.31		1.31		—	%
Per-Bbl Adjusted Gross Margin for crude-oil and NGLs assets (1)	3.10		3.02		3	%	3.09		2.92		6	%
Per-Bbl Adjusted Gross Margin for produced-water assets (1)	0.94		0.94		—	%	0.94		0.96		(2)	%
Adjusted EBITDA	633,752		617,876		3	%	1,845,200		1,753,339		5	%
Free Cash Flow	397,405		388,394		2	%	1,185,197		1,014,887		17	%

_________________________________________________________________________________________

(1)Average for period. Calculated as Adjusted Gross Margin for natural-gas assets, crude-oil and NGLs assets, or produced-water assets, divided by the respective total throughput (MMcf or MBbls) attributable to WES for natural-gas assets, crude-oil and NGLs assets, or produced-water assets.

Adjusted Gross Margin. Adjusted Gross Margin decreased by $4.2 million for the three months ended September 30, 2025, primarily due to (i) decreased product recoveries and average prices at the West Texas complex and (ii) decreased throughput at the Powder River Basin complex. These decreases were offset partially by increased throughput at the DJ Basin complex.

Adjusted Gross Margin increased by $106.4 million for the nine months ended September 30, 2025, primarily due to (i) increased throughput at the West Texas and Powder River Basin complexes, (ii) increased throughput and deficiency fees on certain contracts with increasing throughput minimums at the DBM oil system, and (iii) increased throughput at the DBM water systems, partially offset by a change in contract terms effective January 1, 2025. These increases were offset partially by (i) the sale of our interests in the Marcellus Interest systems, Saddlehorn, and Mont Belvieu JV during 2024, and (ii) decreased throughput at the Springfield gas-gathering system and Granger complex.

Per-Mcf Adjusted Gross Margin for natural-gas assets decreased by $0.05 for the three months ended September 30, 2025, primarily due to decreased product recoveries and average prices at the West Texas complex. This decrease was offset partially by higher throughput at the DJ Basin complex, which has a higher-than-average per-Mcf margin as compared to our other natural-gas assets.

Per-Bbl Adjusted Gross Margin for crude-oil and NGLs assets increased by $0.08 for the three months ended September 30, 2025, primarily due to increased deficiency fees on certain contracts with increasing throughput minimums at the DBM oil system.

Per-Bbl Adjusted gross margin for crude-oil and NGLs assets increased by $0.17 for the nine months ended September 30, 2025, primarily due to (i) increased throughput at the DBM oil system, which has a higher-than-average per-Bbl margin as compared to our other crude-oil and NGLs assets, (ii) lower throughput at TEP and FRP, which have a lower-than-average per-Bbl margin as compared to our other crude oil and NGLs assets, and (iii) the sale of our interest in Whitethorn LLC which had a lower-than-average per-Bbl margins as compared to our other crude oil and NGLs assets. These increases were offset partially by decreased revenues associated with demand volumes, partially offset by increased throughput and higher average fees resulting from cost-of-service rate redeterminations effective January 1, 2025, at the DJ Basin oil system.

Per-Bbl Adjusted Gross Margin for produced-water assets decreased by $0.02 for the nine months ended September 30, 2025, primarily due to a change in contract terms effective January 1, 2025.

Table of Contents

Adjusted EBITDA. Adjusted EBITDA increased by $15.9 million for the three months ended September 30, 2025, primarily due to (i) a $12.2 million decrease in operation and maintenance expenses and (ii) a $10.2 million increase in total revenues and other. These amounts were offset partially by an $8.5 million increase in cost of product (net of lower of cost or market inventory adjustments).

Adjusted EBITDA increased by $91.9 million for the nine months ended September 30, 2025, primarily due to a $135.2 million increase in total revenues and other. This amount was offset partially by (i) a $15.4 million decrease in distributions from equity investments, (ii) a $14.2 million increase in operation and maintenance expenses, and (iii) a $7.4 million increase in property taxes.

Free Cash Flow. Free Cash Flow increased by $9.0 million for the three months ended September 30, 2025, primarily due to (i) an $8.9 million increase in distributions from equity investments in excess of cumulative earnings and (ii) a $6.2 million increase in net cash provided by operating activities. These amounts were offset partially by a $6.1 million increase in capital expenditures.

Free Cash Flow increased by $170.3 million for the nine months ended September 30, 2025, primarily due to (i) an $89.3 million decrease in capital expenditures and (ii) an $82.6 million increase in net cash provided by operating activities.

See Capital Expenditures and Historical Cash Flow within this Item 2 for further information.

LIQUIDITY AND CAPITAL RESOURCES

Our primary cash uses include equity and debt service, operating expenses, acquisitions, and capital expenditures. Our sources of liquidity, as of September 30, 2025, included cash and cash equivalents, cash flows generated from operations, effective borrowing capacity under the RCF, our commercial paper program, and potential issuances of additional equity or debt securities. We believe that cash flows generated from these sources will be sufficient to satisfy our short-term working-capital requirements and long-term capital-expenditure and debt-service requirements.

The amount of future distributions to unitholders will be determined by the Board on a quarterly basis. We distribute all our available cash, as defined in our partnership agreement, within 55 days following each quarter’s end. The Board declared a cash distribution to unitholders for the third quarter of 2025 of $0.910 per unit, or $379.5 million in the aggregate. The cash distribution is payable on November 14, 2025, to our unitholders of record at the close of business on October 31, 2025. See Note 12—Subsequent Event under Part I, Item 1 of this Form 10-Q.

In February 2025, the Board authorized a buyback program of up to $250.0 million of our common units through December 31, 2026 (the “2025 Purchase Program”). The common units may be purchased from time to time in the open market at prevailing market prices or in privately negotiated transactions. The timing and amount of purchases under the program will be determined based on ongoing assessments of capital needs, our financial performance, the market price of our common units, and other factors, including organic growth and acquisition opportunities and general market conditions. The program does not obligate us to acquire any common units and the program may be suspended or discontinued at our discretion without prior notice.

Management continuously monitors our leverage position and other financial projections to manage the capital structure according to long-term objectives. We may, from time to time, seek to retire, rearrange, or amend some or all of our outstanding debt or financing agreements through cash purchases, exchanges, open-market repurchases, privately negotiated transactions, tender offers, or otherwise. Such transactions, if any, will depend on prevailing market conditions, our liquidity position and requirements, contractual restrictions, and other factors, and the amounts involved may be material. Our ability to generate cash flows is subject to a number of factors, some of which are beyond our control. Read Risk Factors under Part II, Item 1A of this Form 10-Q.

Table of Contents

Working capital. Working capital is an indication of liquidity and potential needs for short-term funding. Working capital requirements are driven by changes in accounts receivable and accounts payable and other factors such as credit extended to, and the timing of collections from, our customers, and the level and timing of our spending for acquisitions, maintenance, and other capital activities. As of September 30, 2025, we had a $276.6 million working capital surplus, which we define as the amount by which current assets exceed current liabilities. As of September 30, 2025, there was $2.0 billion in effective borrowing capacity under the RCF. Any outstanding commercial paper borrowings reduce the effective borrowing capacity under the RCF as WES Operating maintains availability under the RCF as support for its commercial paper program. See Note 8—Selected Components of Working Capital and Note 9—Debt in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

Capital expenditures. Capital expenditures in the consolidated statements of cash flows reflect capital expenditures on a cash basis, when payments are made. Capital incurred is presented on an accrual basis. Acquisitions and capital expenditures as presented in the consolidated statements of cash flows and capital incurred were as follows:




	Nine Months Ended September 30,
thousands	2025		2024
Acquisitions	$	—	$	443
Capital expenditures (1)	505,783		595,087
Capital incurred (1)	503,817		623,985

_________________________________________________________________________________________

(1)For the nine months ended September 30, 2025 and 2024, included $6.7 million and $11.1 million, respectively, of capitalized interest.

Capital expenditures decreased by $89.3 million for the nine months ended September 30, 2025, primarily due to decreases of (i) $180.5 million at the West Texas complex, primarily attributable to construction costs incurred in 2024 associated with the North Loving plant that was completed in the first quarter of 2025 and (ii) $21.3 million at the DBM water systems due to decreased construction of certain water-disposal wells, equipment, facilities, and well-connect projects. These decreases were offset partially by increases of (i) $64.5 million at the Powder River Basin complex primarily attributable to an increase in construction of facilities and well-connect projects, (ii) $27.1 million at the DBM oil system related to an increase in pipeline, oil pumping, and electrical distribution projects, and (iii) $16.4 million at the Chipeta complex primarily related to facility upgrades and gathering pipeline construction.

Table of Contents

Historical cash flow. The following table and discussion present a summary of our net cash flows provided by (used in) operating, investing, and financing activities:




	Nine Months Ended September 30,
thousands	2025		2024
Net cash provided by (used in):
Operating activities	$	1,664,980	$	1,582,414
Investing activities	(476,292)		191,153
Financing activities	(2,101,864)		(921,617)
Net increase (decrease) in cash and cash equivalents	$	(913,176)	$	851,950

Operating activities. Net cash provided by operating activities increased for the nine months ended September 30, 2025, primarily due to higher cash operating income, partially offset by lower distributions from equity-investment earnings and higher interest expense. Refer to Operating Results within this Item 2 for a discussion of our results of operations as compared to the prior periods.

Investing activities. Net cash used in investing activities for the nine months ended September 30, 2025, primarily included (i) capital expenditures, primarily related to expansion, construction, and asset-integrity projects at the West Texas complex, Powder River Basin complex, DBM water systems, DBM oil system, DJ Basin complex, and Chipeta complex and (ii) distributions received from equity investments in excess of cumulative earnings.

Net cash provided by investing activities for the nine months ended September 30, 2024, primarily included (i) proceeds related to the sale of several equity investments to third parties, (ii) proceeds related to the sale of our 33.75% interest in the Marcellus Interest systems to a third party, (iii) distributions received from equity investments in excess of cumulative earnings, (iv) capital expenditures, primarily related to expansion, construction, and asset-integrity projects at the West Texas complex, DBM oil system, Powder River Basin complex, DBM water systems, DJ Basin complex, and Chipeta complex, and (v) increases to materials and supplies inventory and other.

Financing activities. Net cash used in financing activities for the nine months ended September 30, 2025, primarily included (i) distributions paid to WES unitholders and noncontrolling interest owners and (ii) repayment of the total principal amount outstanding of the 3.950% Senior Notes due 2025 and 3.100% Senior Notes due 2025 at par value.

Net cash used in financing activities for the nine months ended September 30, 2024, primarily included (i) distributions paid to WES unitholders and noncontrolling interest owners, (ii) net repayments under the commercial paper program, (iii) retiring portions of certain of WES Operating’s senior notes via open-market repurchases, and (iv) proceeds from the 5.450% Senior Notes due 2034 issued in August 2024.

Debt and credit facilities. As of September 30, 2025, (i) the carrying value of outstanding debt was $6.9 billion, (ii) we have $440.5 million of borrowings under the 4.650% Senior Notes due 2026 that are classified as long-term debt on the consolidated balance sheet as WES Operating has the ability and intent to refinance these obligations using long-term debt, and (iii) we have $2.0 billion in effective borrowing capacity under WES Operating’s $2.0 billion RCF. Any outstanding commercial paper borrowings reduce the effective borrowing capacity under the RCF as WES Operating maintains availability under the RCF as support for its commercial paper program.

During the nine months ended September 30, 2025, WES Operating (i) retired the 3.950% Senior Notes due 2025 on the maturity date of June 1, 2025, for $336.8 million and (ii) retired the 3.100% Senior Notes due 2025 on the maturity date of February 3, 2025, for $663.8 million. WES Operating repaid the 3.950% Senior Notes due 2025 and 3.100% Senior Notes due 2025 with cash on hand, including proceeds received from the 2024 public offering of $800.0 million in aggregate principal amount of 5.450% Senior Notes due 2034.

For additional information on our senior notes, RCF, and commercial paper program, see Note 9—Debt in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

Table of Contents

Credit risk. We bear credit risk through exposure to non-payment or non-performance by our counterparties (e.g., Occidental and other customers, financial institutions, and other parties), including risks from a customer’s inability to satisfy payables to us for services rendered, minimum-volume-commitment deficiency payments owed, or volumes owed pursuant to gas- or NGLs-imbalance agreements. We examine and monitor the creditworthiness of customers and may establish credit limits for customers. We are subject to the risk of non-payment or late payment by producers for gathering, processing, transportation, and disposal fees. Additionally, we continue to evaluate counterparty credit risk and, in certain circumstances, are exercising our contractual rights to request adequate assurance of performance.

We expect our exposure to the concentrated risk of non-payment or non-performance to continue for as long as our commercial relationships with Occidental generate a significant portion of our revenues. While Occidental is our contracting counterparty, gathering and processing arrangements with affiliates of Occidental on most of our systems include not just Occidental-produced volumes, but also, in some instances, the volumes of other working-interest owners of Occidental who rely on our facilities and infrastructure to bring their volumes to market. See Note 6—Related-Party Transactions in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

Our ability to make cash distributions to our unitholders may be adversely impacted if Occidental becomes unable to perform under the terms of gathering, processing, transportation, and disposal agreements.

ITEMS AFFECTING THE COMPARABILITY OF FINANCIAL RESULTS WITH WES OPERATING

Our consolidated financial statements include the consolidated financial results of WES Operating. Our results of operations do not differ materially from the results of operations and cash flows of WES Operating, which are reconciled below.

Reconciliation of net income (loss). The differences between net income (loss) attributable to WES and WES Operating are reconciled as follows:




	Three Months Ended				Nine Months Ended

thousands	September 30, 2025		June 30, 2025		September 30, 2025		September 30, 2024
Net income (loss) attributable to WES	$	339,615	$	341,680	$	990,302	$	1,239,958
Limited partner interest in WES Operating not held by WES (1)	6,941		6,980		20,224		25,350
General and administrative expenses (2)	339		301		452		2,001
Other income (expense), net	(47)		(49)		(142)		(194)


Net income (loss) attributable to WES Operating	$	346,848	$	348,912	$	1,010,836	$	1,267,115

_________________________________________________________________________________________

(1)Represents the portion of net income (loss) allocated to the limited partner interest in WES Operating not held by WES. A subsidiary of Occidental held a 2.0% limited partner interest in WES Operating for all periods presented.

(2)Represents general and administrative expenses incurred by WES separate from, and in addition to, those incurred by WES Operating.

Table of Contents

Reconciliation of net cash provided by (used in) operating and financing activities. The differences between net cash provided by (used in) operating and financing activities for WES and WES Operating are reconciled as follows:




	Nine Months Ended September 30,
thousands	2025		2024
WES net cash provided by operating activities	$	1,664,980	$	1,582,414
General and administrative expenses (1)	452		2,001
Non-cash equity-based compensation expense	(430)		(435)
Changes in working capital	(21,045)		(26,530)
Other income (expense), net	(142)		(194)


WES Operating net cash provided by operating activities	$	1,643,815	$	1,557,256

WES net cash provided by (used in) financing activities	$	(2,101,864)	$	(921,617)
Distributions to WES unitholders (2)	1,051,503		905,155
Distributions to WES from WES Operating (3)	(1,052,451)		(906,294)
Increase (decrease) in outstanding checks	(66)		37

Other	21,648		23,974
WES Operating net cash provided by (used in) financing activities	$	(2,081,230)	$	(898,745)

_________________________________________________________________________________________

(1)Represents general and administrative expenses incurred by WES separate from, and in addition to, those incurred by WES Operating.

(2)Represents distributions to WES common unitholders paid under WES’s partnership agreement. See Note 4—Partnership Distributions and Note 5—Equity and Partners’ Capital in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

(3)Difference attributable to elimination in consolidation of WES Operating’s distributions on partnership interests owned by WES. See Note 4—Partnership Distributions and Note 5—Equity and Partners’ Capital in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

Noncontrolling interest. WES Operating’s noncontrolling interest consists of the 25% third-party interest in Chipeta.

WES Operating distributions. WES Operating distributes all of its available cash on a quarterly basis to WES Operating unitholders in proportion to their share of limited partner interests in WES Operating. See Note 4—Partnership Distributions in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

CRITICAL ACCOUNTING ESTIMATES

The preparation of consolidated financial statements in accordance with GAAP requires management to make informed judgments and estimates that affect the amounts of assets and liabilities as of the date of the financial statements and the amounts of revenues and expenses recognized during the periods reported. There have been no significant changes to our critical accounting estimates from those disclosed in our annual report on Form 10-K for the fiscal year ended December 31, 2024.

RECENT ACCOUNTING DEVELOPMENTS

See Note 1—Description of Business and Basis of Presentation in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

Table of Contents

Item 3. Quantitative and Qualitative Disclosures About Market Risk

Commodity-price risk. There have been no significant changes to our commodity-price risk discussion from the disclosure set forth under Part II, Item 7A in our Form 10-K for the year ended December 31, 2024, except as noted below and in Outlook under Part I, Item 2 of this Form 10-Q.

For the nine months ended September 30, 2025, 98% of our wellhead natural-gas volume (excluding equity investments) and 100% of our crude-oil and produced-water throughput (excluding equity investments) were serviced under fee-based contracts. A 10% increase or decrease in commodity prices would not have a material impact on our operating income (loss), financial condition, or cash flows for the next 12 months, excluding the effect of imbalances.

Interest-rate risk. The Federal Open Market Committee lowered its target range for the federal funds rate three times in 2024, and decreased it once during the nine months ended September 30, 2025. Any future increases in the federal funds rate likely will result in an increase in financing costs. As of September 30, 2025, WES Operating had (i) no outstanding borrowings under the RCF that bear interest at a rate based on the Secured Overnight Financing Rate (“SOFR”) or an alternative base rate at WES Operating’s option and (ii) no outstanding commercial paper borrowings. While a 10% change in the applicable benchmark interest rate would not materially impact interest expense on our outstanding borrowings at September 30, 2025, it would impact the fair value of the senior notes.

Additional short-term or variable-rate debt may be issued in the future, either under the RCF or other financing sources, including commercial paper borrowings or debt issuances.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures. The Chief Executive Officer and Chief Financial Officer of WES’s general partner and WES Operating GP (for purposes of this Item 9A, “Management”) performed an evaluation of WES’s and WES Operating’s disclosure controls and procedures as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act. WES’s and WES Operating’s disclosure controls and procedures are designed to ensure that information required to be disclosed in the reports that are filed or submitted under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in the rules and forms of the SEC, and to ensure that the information required to be disclosed in the reports that are filed or submitted under the Exchange Act is accumulated and communicated to management, including the principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure. Based on this evaluation, Management concluded that WES’s and WES Operating’s disclosure controls and procedures were effective as of September 30, 2025.

Changes in Internal Control Over Financial Reporting. There were no changes in WES’s or WES Operating’s internal control over financial reporting during the quarter ended September 30, 2025, that have materially affected, or are reasonably likely to materially affect, WES’s or WES Operating’s internal control over financial reporting.

Table of Contents

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

Solaris Water Midstream, LLC (“Solaris”) and certain affiliates are named defendants in Cause No. 23-05-1085, Stateline Operating, LLC and Stateline Royalties, LP vs. Devon Energy Corporation, Stateline Water, LLC, Devon Energy Production Company, LP, Solaris Water Midstream, LLC, Solaris Midstream DB-TX LLC, and Aris Water Solutions, Inc., in the 143rd District Court, Loving County, Texas, which was filed on May 4, 2023. In this action, Plaintiffs sue Defendants for, among other things, negligence, waste, trespass, and nuisance based on Plaintiffs’ allegations that Defendants’ operations have harmed Plaintiffs’ oil and gas lease through the injection of disposed saltwater. Defendants dispute Plaintiffs’ claims of liability and damages in this matter. Trial is currently scheduled for June 1, 2026.

We have elected to use a $1.0 million threshold for disclosing certain proceedings arising under federal, state, or local environmental laws when a government authority is a party and potential monetary sanctions are involved. We believe proceedings under this threshold are not material to our business and financial proceedings.

Other than the items listed herein, we are not a party to any legal, regulatory, or administrative proceedings other than proceedings arising in the ordinary course of business. Management believes that there are no such proceedings for which a final disposition could have a material adverse effect on results of operations, cash flows, or financial condition, or for which disclosure is otherwise required by Item 103 of Regulation S-K.

Item 1A. Risk Factors

Security holders and potential investors in our securities should carefully consider the risk factor included below and those set forth under Part I, Item 1A in our Form 10-K for the year ended December 31, 2024, together with all of the other information included in this document, and in our other public filings, press releases, and public discussions with management.

We may fail to successfully combine our business with the assets and business of Aris, which could have an adverse impact on our future results.

The Aris acquisition closed on October 15, 2025. The integration of these acquired assets involves potential risks, including the failure to realize expected profitability, growth, or accretion; environmental or regulatory compliance matters or liabilities; diversion of management’s attention from our existing business; and the incurrence of unanticipated liabilities and costs for which indemnification is unavailable or inadequate.

If any of the risks described above or other anticipated or unanticipated liabilities were to materialize, it could have an adverse effect on our business, financial condition, and results of operations.

Table of Contents

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

The following table sets forth information with respect to repurchases made by WES of its common units in the open market or in privately negotiated transactions under the 2025 Purchase Program during the third quarter of 2025:


Period	Total number of units purchased	Average price paid per unit		Total number of units purchased as part of publicly announced plans or programs (1)	Approximate dollar value of units that may yet be purchased under the plans or programs (1)
July 1-31, 2025	—	$	—	—	$	250,000,000
August 1-31, 2025	—	—		—	250,000,000
September 1-30, 2025	—	—		—	250,000,000
Total	—	—		—

______________________________________________________________________________________

(1)In 2025, the Board authorized WES to buy back up to $250.0 million of our common units through December 31, 2026. See Note 5—Equity and Partners’ Capital in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q for additional details.

Item 5. Other Information

Insider Trading Arrangements

Rule 10b5-1 under the Exchange Act provides an affirmative defense that enables prearranged transactions in securities in a manner that avoids concerns about initiating transactions at a future date while possibly in possession of material nonpublic information. Our Insider Trading Policy permits our directors and executive officers to enter into trading plans designed to comply with Rule 10b5-1. During the three months ended September 30, 2025, none of our executive officers or directors adopted or terminated a Rule 10b5-1 trading arrangement (as defined in Item 408(a)(1)(i) of Regulation S-K) or adopted or terminated a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K).

Table of Contents

Item 6. Exhibits

Exhibits designated by an asterisk (*) are filed herewith and those designated with asterisks (**) are furnished herewith; all exhibits not so designated are incorporated herein by reference to a prior filing as indicated.

Exhibit Index


Exhibit Number			Description
#	2.	1	Contribution Agreement and Agreement and Plan of Merger, dated as of November 7, 2018, by and among Anadarko Petroleum Corporation, Anadarko E&P Onshore LLC, APC Midstream Holdings, LLC, Western Gas Equity Partners, LP, Western Gas Equity Holdings, LLC, Western Gas Partners, LP, Western Gas Holdings, LLC, Clarity Merger Sub, LLC, WGR Asset Holding Company LLC, WGR Operating, LP, Kerr-McGee Gathering LLC, Kerr-McGee Worldwide Corporation and Delaware Basin Midstream, LLC (incorporated by reference to Exhibit 2.1 to Western Gas Equity Partners, LP’s Current Report on Form 8-K filed on November 8, 2018, File No. 001-35753).
	2.	2	Agreement and Plan of Merger, dated as of August 6, 2025, by and among Western Midstream Partners, LP, Arrakis OpCo Merger Sub LLC, Arrakis Holdings Inc., Arrakis Unit Merger Sub LLC, Arrakis Cash Merger Sub LLC, Aris Water Solutions, Inc. and Aris Water Holdings, LLC (incorporated by reference to Exhibit 2.1 to Western Midstream Partners, LP’s Current Report on Form 8-K filed on August 6, 2025, File No. 001-35753).
	3.	1	Certificate of Limited Partnership of Western Gas Equity Partners, LP (incorporated by reference to Exhibit 3.1 to the Registration Statement on Form S-1 of Western Gas Equity Partners, LP filed on November 5, 2012, File No. 333-184763).
	3.	2	Certificate of Amendment to Certificate of Limited Partnership of Western Gas Equity Partners, LP, effective as of February 28, 2019 (incorporated by reference to Exhibit 3.1 to Western Midstream Partners, LP’s Current Report on Form 8-K filed on February 28, 2019, File No. 001-35753).
	3.	3	Second Amended and Restated Agreement of Limited Partnership of Western Midstream Partners, LP, dated as of December 31, 2019 (incorporated by reference to Exhibit 3.1 to Western Midstream Partners, LP’s Current Report on Form 8-K filed on January 6, 2020, File No. 001-35753).
	3.	4	Certificate of Formation of Western Gas Equity Holdings, LLC (incorporated by reference to Exhibit 3.3 to Western Gas Equity Partners, LP’s Registration Statement on Form S-1 filed on November 5, 2012, File No. 333-184763).
	3.	5	Certificate of Amendment to Certificate of Formation of Western Gas Equity Holdings, LLC, effective as of February 28, 2019 (incorporated by reference to Exhibit 3.2 to Western Midstream Partners, LP’s Current Report on Form 8-K filed on February 28, 2019, File No. 001-35753).
	3.	6	Second Amended and Restated Limited Liability Company Agreement of Western Midstream Holdings, LLC, dated as of February 28, 2019 (incorporated by reference to Exhibit 3.7 to Western Midstream Partners, LP’s Current Report on Form 8-K filed on February 28, 2019, File No. 001-35753).
	3.	7	Amendment No. 1 to Second Amended and Restated Limited Liability Company Agreement of Western Midstream Holdings, LLC, dated February 28, 2019 (incorporated by reference to Exhibit 3.1 to Western Midstream Partners, LP’s Current Report on Form 8-K filed on March 26, 2019, File No. 001-35753).
	3.	8	Certificate of Limited Partnership of Western Gas Partners, LP (incorporated by reference to Exhibit 3.1 to Western Gas Partners, LP’s Registration Statement on Form S-1 filed on October 15, 2007, File No. 333-146700).
	3.	9	Third Amended and Restated Agreement of Limited Partnership of Western Midstream Operating, LP, dated as of February 28, 2019 (incorporated by reference to Exhibit 3.5 to Western Midstream Partners, LP’s Current Report on Form 8-K filed on February 28, 2019, File No. 001-35753).
	3.	10	Certificate of Formation of Western Gas Holdings, LLC (incorporated by reference to Exhibit 3.3 to Western Gas Partners, LP’s Registration Statement on Form S-1 filed on October 15, 2007, File No. 333-146700).
	3.	11	Certificate of Amendment to Certificate of Formation of Western Gas Holdings, LLC, effective as of February 28, 2019 (incorporated by reference to Exhibit 3.4 to Western Midstream Partners, LP’s Current Report on Form 8-K filed on February 28, 2019, File No. 001-35753).
	3.	12	Third Amended and Restated Limited Liability Company Agreement of Western Midstream Operating GP, LLC, dated as of February 28, 2019 (incorporated by reference to Exhibit 3.8 to Western Midstream Partners, LP’s Current Report on Form 8-K filed on February 28, 2019, File No. 001-35753).

Table of Contents


Exhibit Number			Description
	3.	13	Certificate of Merger of Clarity Merger Sub, LLC with and into Western Gas Partners, LP, effective as of February 28, 2019 (incorporated by reference to Exhibit 3.3 to Western Midstream Partners, LP’s Current Report on Form 8-K filed on February 28, 2019, File No. 001-35753).
	4.	1	Description of the registrant’s securities registered pursuant to Section 12 of the Securities Exchange Act of 1934 (incorporated by reference to Exhibit 4.1 to Western Midstream Partners, LP’s Annual Report on Form 10-K filed on February 21, 2024, File No. 001-35753).
	4.	2	Specimen Unit Certificate for the Common Units (incorporated by reference to Exhibit 4.1 to Western Gas Partners, LP’s Quarterly Report on Form 10-Q filed on June 13, 2008, File No. 001-34046).
	4.	3	Indenture, dated as of May 18, 2011, among Western Gas Partners, LP, as Issuer, the Subsidiary Guarantors named therein, as Guarantors, and Wells Fargo Bank, National Association, as Trustee (incorporated by reference to Exhibit 4.1 to Western Gas Partners, LP’s Current Report on Form 8-K filed on May 18, 2011, File No. 001-34046).
	4.	4	Sixth Supplemental Indenture, dated as of March 20, 2014, among Western Gas Partners, LP, as Issuer, and Wells Fargo Bank, National Association, as Trustee (incorporated by reference to Exhibit 4.2 to Western Gas Partners, LP’s Current Report on Form 8-K filed on March 20, 2014, File No. 001-34046).
	4.	5	Form of 5.450% Senior Notes due 2044 (incorporated by reference to Exhibit 4.4, which is included as Exhibit A to Exhibit 4.2, to Western Gas Partners, LP’s Current Report on Form 8-K filed on March 20, 2014, File No. 001-34046).
	4.	6	Seventh Supplemental Indenture, dated as of June 4, 2015, among Western Gas Partners, LP, as Issuer, and Wells Fargo Bank, National Association, as Trustee (incorporated by reference to Exhibit 4.1 to Western Gas Partners, LP’s Current Report on Form 8-K filed on June 4, 2015, File No. 001-34046).
	4.	7	Form of 3.950% Senior Notes due 2025 (incorporated by reference to Exhibit 4.2, which is included as Exhibit A to Exhibit 4.1, to Western Gas Partners, LP’s Current Report on Form 8-K filed on June 4, 2015, File No. 001-34046).
	4.	8	Eighth Supplemental Indenture, dated as of July 12, 2016, among Western Gas Partners, LP, as Issuer, and Wells Fargo Bank, National Association, as Trustee (incorporated by reference to Exhibit 4.1 to Western Gas Partners, LP’s Current Report on Form 8-K filed on July 12, 2016, File No. 001-34046).
	4.	9	Form of 4.650% Senior Notes due 2026 (incorporated by reference to Exhibit 4.2, which is included as Exhibit A to Exhibit 4.1, to Western Gas Partners, LP’s Current Report on Form 8-K filed on July 12, 2016, File No. 001-34046).
	4.	10	Ninth Supplemental Indenture, dated as of March 2, 2018, among Western Gas Partners, LP, as Issuer, and Wells Fargo Bank, National Association, as Trustee (incorporated by reference to Exhibit 4.1 to Western Gas Partners, LP’s Current Report on Form 8-K filed on March 2, 2018, File No. 001-34046).
	4.	11	Form of 4.500% Senior Notes due 2028 (incorporated by reference to Exhibit 4.2, which is included as Exhibit A-1 to Exhibit 4.1, to Western Gas Partners, LP’s Current Report on Form 8-K filed on March 2, 2018, File No. 001-34046).
	4.	12	Form of 5.300% Senior Notes due 2048 (incorporated by reference to Exhibit 4.3, which is included as Exhibit A-2 to Exhibit 4.1, to Western Gas Partners, LP’s Current Report on Form 8-K filed on March 2, 2018, File No. 001-34046).
	4.	13	Tenth Supplemental Indenture, dated as of August 9, 2018, by and between Western Gas Partners, LP, as Issuer, and Wells Fargo Bank, National Association, as Trustee (incorporated by reference to Exhibit 4.1 to Western Gas Partners, LP’s Current Report on Form 8-K filed on August 9, 2018, File No. 001-34046).
	4.	14	Form of 4.750% Senior Notes due 2028 (incorporated by reference to Exhibit 4.2, which is included as Exhibit A-1 to Exhibit 4.1, to Western Gas Partners, LP’s Current Report on Form 8-K filed on August 9, 2018, File No. 001-34046).
	4.	15	Form of 5.500% Senior Notes due 2048 (incorporated by reference to Exhibit 4.3, which is included as Exhibit A-2 to Exhibit 4.1, to Western Gas Partners, LP’s Current Report on Form 8-K filed on August 9, 2018, File No. 001-34046).
	4.	16	Eleventh Supplemental Indenture, dated as of January 13, 2020, by and between Western Midstream Operating, LP, as Issuer, and Wells Fargo Bank, National Association, as Trustee (incorporated by reference to Exhibit 4.1 to Western Midstream Operating, LP’s Current Report on Form 8-K filed on January 13, 2020, File No. 001-34046).
	4.	17	Form of 3.100% Senior Notes due 2025 (incorporated by reference to Exhibit 4.3, which is included as Exhibit A-2 to Exhibit 4.1 to Western Midstream Operating, LP’s Current Report on Form 8-K filed on January 13, 2020, File No. 001-34046).

Table of Contents


Exhibit Number			Description
	4.	18	Form of 4.050% Senior Notes due 2030 (incorporated by reference to Exhibit 4.4, which is included as Exhibit A-3 to Exhibit 4.1 to Western Midstream Operating, LP’s Current Report on Form 8-K filed on January 13, 2020, File No. 001-34046).
	4.	19	Form of 5.250% Senior Notes due 2050 (incorporated by reference to Exhibit 4.5, which is included as Exhibit A-4 to Exhibit 4.1 to Western Midstream Operating, LP’s Current Report on Form 8-K filed on January 13, 2020, File No. 001-34046).
	4.	20	Twelfth Supplemental Indenture, dated as of April 4, 2023, by and between Western Midstream Operating, LP, as Issuer, and Computershare Trust Company, National Association, as Trustee (incorporated by reference to Exhibit 4.1 to Western Midstream Operating, LP’s Current Report on Form 8-K filed on April 5, 2023, File No. 001-34046).
	4.	21	Form of 6.150% Senior Notes due 2033 (incorporated by reference to Exhibit 4.2, which is included as Exhibit A to Exhibit 4.1 to Western Midstream Operating, LP’s Current Report on Form 8-K filed on April 5, 2023, File No. 001-34046).
	4.	22	Thirteenth Supplemental Indenture, dated as of September 29, 2023, by and between Western Midstream Operating, LP, as Issuer, and Computershare Trust Company, National Association, as Trustee (incorporated by reference to Exhibit 4.1 to Western Midstream Operating, LP’s Current Report on Form 8-K filed on September 29, 2023, File No. 001-34046).
	4.	23	Form of 6.350% Senior Notes due 2029 (incorporated by reference to Exhibit 4.2, which is included as Exhibit A to Exhibit 4.1 to Western Midstream Operating, LP’s Current Report on Form 8-K filed on September 29, 2023, File No. 001-34046).
	4.	24	Fourteenth Supplemental Indenture, dated as of August 20, 2024, by and between Western Midstream Operating, LP, as Issuer, and Computershare Trust Company, National Association, as Trustee (incorporated by reference to Exhibit 4.1 to Western Midstream Operating, LP’s Current Report on Form 8-K filed on August 20, 2024, File No. 001-34046).
	4.	25	Form of 5.450% Senior Notes due 2034 (incorporated by reference to Exhibit 4.2, which is included as Exhibit A to Exhibit 4.1 to Western Midstream Operating, LP’s Current Report on Form 8-K filed on August 20, 2024, File No. 001-34046).



































*	31.	1	Certification of Chief Executive Officer, pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 - Western Midstream Partners, LP.
*	31.	2	Certification of Chief Financial Officer, pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 - Western Midstream Partners, LP.
*	31.	3	Certification of Chief Executive Officer, pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 - Western Midstream Operating, LP.
*	31.	4	Certification of Chief Financial Officer, pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 - Western Midstream Operating, LP.
**	32.	1	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 - Western Midstream Partners, LP.
**	32.	2	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 - Western Midstream Operating, LP.

*	101.	INS	XBRL Instance Document (the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document)
*	101.	SCH	Inline XBRL Schema Document
*	101.	CAL	Inline XBRL Calculation Linkbase Document
*	101.	DEF	Inline XBRL Definition Linkbase Document
*	101.	LAB	Inline XBRL Label Linkbase Document
*	101.	PRE	Inline XBRL Presentation Linkbase Document
*	104		Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

______________________________________________________________________________________




#			Pursuant to Item 601(b)(2) of Regulation S-K, the registrant agrees to furnish supplementally a copy of any omitted schedule to the Securities and Exchange Commission upon request.

Table of Contents

SIGNATURES

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


			WESTERN MIDSTREAM PARTNERS, LP

November 4, 2025
			/s/ Oscar K. Brown
			Oscar K. Brown President and Chief Executive Officer Western Midstream Holdings, LLC (as general partner of Western Midstream Partners, LP)

November 4, 2025
			/s/ Kristen S. Shults
			Kristen S. Shults Senior Vice President and Chief Financial Officer Western Midstream Holdings, LLC (as general partner of Western Midstream Partners, LP)


			WESTERN MIDSTREAM OPERATING, LP

November 4, 2025
			/s/ Oscar K. Brown
			Oscar K. Brown President and Chief Executive Officer Western Midstream Operating GP, LLC (as general partner of Western Midstream Operating, LP)

November 4, 2025
			/s/ Kristen S. Shults
			Kristen S. Shults Senior Vice President and Chief Financial Officer Western Midstream Operating GP, LLC (as general partner of Western Midstream Operating, LP)

Western Midstream - 10-Q quarterly report FY

What is the market capitalization of a company?

DISCLAIMER

Contact

Links