Marathon Petroleum MPC

EnergyMarket cap $111B3 connections

Marathon Petroleum is one of America's largest oil refiners, operating 13 refineries with 3M+ barrels/day of capacity. It converts crude oil into gasoline, diesel, and jet fuel sold through 7,000+ Speedway locations. Its MPLX midstream partnership gathers and transports crude from the Permian. Refining margins (the crack spread) are its key profit driver - they soared post-COVID as refinery capacity was permanently retired.

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Partners 1

Strategic partnerships, joint products and alliances

Valero EnergyEnergy · $111BCompeting petroleum refiners

Stakes owned 1

Companies Marathon Petroleum owns or has invested in

MPLXEnergy · $58BMarathon Petroleum owns and controls MPLXsince 2012

Competitors 1

Companies it competes with

ChevronEnergy · $404BRefining operations

Other Energy companies

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

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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.