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Marathon Petroleum Corporation (MPC) is an energy company in the americas oil processing facilities industry, based in Findlay, United States, with about 18,500 full-time employees.
In Q2 2026 (the quarter ended June 30, 2026) revenue was $51.99 billion. Its largest business segment, Refining & Marketing, brought in 90% of segment revenue in fiscal year 2025. Its market capitalization was $132.84 billion as of October 9, 2026.
Figures from company filings and market data; latest fiscal year ended December 31, 2025; market data as of October 9, 2026.
Marathon Petroleum Corporation, together with its subsidiaries, operates as an integrated downstream energy company in the United States. The company operates through three segments: Refining & Marketing; Midstream; and Renewable Diesel.
Refining & Marketing, with $124.31 billion or 90% of segment revenue in fiscal year 2025. Next: Midstream (8%) and Renewable Diesel (2%).
$132.84 billion as of October 9, 2026.
Listed companies of a similar size in the same industry (americas oil processing facilities) include Valero Energy Corporation (VLO), Phillips 66 (PSX), Cenovus Energy Inc. (CVE), HF Sinclair Corporation (DINO).