Largest US Oil & Gas Companies by Market Cap

This list is limited to companies whose profile has sector Energy and country code US— integrated producers, E&P, midstream, refining, and related services in our data. Aramco, European majors, and other non-U.S. Energy names are excluded by design. Market cap is from the latest prices we store.

Third-party "oil & gas" screens may use different taxonomies. For a worldwide cap table without a country filter, use the full market cap ranking. For revenue-based size, see the revenue ranking.