Occidental Petroleum vs Marathon Petroleum
Side-by-side comparison of AI visibility scores, market position, and capabilities
Permian-led integrated E&P with $26.2B FY2024 revenue; Berkshire Hathaway ~29% stake; $12B CrownRock acquisition 2023; STRATOS world's largest DAC plant opened 2024; OxyChem countercyclical.
About
Occidental Petroleum is an integrated oil and gas company with leading positions in the Permian Basin, Middle East, and Latin America, founded in 1920 in Los Angeles and now headquartered in Houston, Texas, trading on NYSE (OXY). The company generated approximately $26.2 billion in revenues for FY2024 under CEO Vicki Hollub, who has established Occidental as the oil and gas industry's most ambitious carbon management company through its STRATOS Direct Air Capture facility—the world's largest operational DAC plant, opened in Ector County, Texas in 2024 with capacity to remove 500,000 metric tons of CO2 annually. Berkshire Hathaway, led by Warren Buffett, has accumulated approximately 29% of Occidental's common shares and holds warrants to acquire an additional 83.9 million shares, representing one of Buffett's largest concentrated investments and a strong endorsement of Occidental's Permian Basin strategy.
Findlay OH petroleum refining (NYSE: MPC); largest US refiner 3M barrels/day, CEO Maryann Mannen elected Chairman (Jan 2026), MPLX midstream MLP, Martinez renewable diesel conversion competing with Valero and Phillips 66.
About
Marathon Petroleum Corporation is a Findlay, Ohio-based petroleum refining and midstream company — publicly traded on the New York Stock Exchange (NYSE: MPC) as an S&P 500 Energy component — operating the largest crude oil refining system in the United States with 13 refineries and approximately 3 million barrels per day of crude oil processing capacity across Texas, Louisiana, Illinois, Michigan, Ohio, North Dakota, California, and Washington, along with a majority ownership interest in MPLX LP (NYSE: MPLX), a midstream pipeline, terminal, and marine vessel MLP that gathers, processes, transports, and stores crude oil, natural gas, and petroleum products. In a defining leadership development, Marathon Petroleum's board elected CEO Maryann T. Mannen as Chairman of the Board effective January 1, 2026, succeeding Michael Hennigan who retired after leading the company through the Speedway divestiture and pandemic recovery — consolidating corporate governance leadership in Mannen following her tenure as CEO during which she managed the company's operations and capital allocation strategy. Marathon Petroleum's large-scale refining system (including the Galveston Bay refinery in Texas City as the largest US refinery at 631,000 barrels/day) processes crude oil into gasoline, diesel, jet fuel, and specialty products distributed through branded Speedway (sold to 7-Eleven in 2021) and independent dealer networks and MPLX's logistics infrastructure.
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