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ExxonMobil largest US oil company

ExxonMobil is the largest American oil company by market capitalization, with Chevron as a distant rival. The claim is based on market capitalization and integrated operations.

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Jan 15, 2026
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What is the largest American oil company?

ExxonMobil is the largest American oil company by market capitalization and is widely reported as the nation's biggest oil major . Multiple industry trackers and recent reporting — including S&P-deriv...