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Marathon Oil MRO

EnergyMarket cap $15B4 connections

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Customers 1

Companies Marathon Oil sells to

Phillips 66Energy · $102BCrude oil to refiners

Competitors 3

Companies it competes with

ChevronEnergy · $404BUS oil exploration
ConocoPhillipsEnergy · $153BUS oil production
EOG ResourcesEnergy · $74BShale oil competition

Other Energy companies

Saudi Aramco ExxonMobil Chevron Shell plc NextEra Energy ConocoPhillips TotalEnergies Marathon Petroleum Valero Energy Phillips 66

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Relationships are compiled by VexMap from company filings, announcements and reporting, and last reviewed September 2026. Spotted something wrong? Tell us. Not investment advice.