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Occidental Petroleum is an independent exploration and production company with operations in the United States, Latin America, and the Middle East. At the end of 2023, the company reported net proved reserves of nearly 4 billion barrels of oil equivalent. Net production averaged 1,234 thousand barrels of oil equivalent per day in 2023 at a ratio of roughly 50% oil and natural gas liquids and 50% natural gas.

Fort Worth-based Range Resources is an independent exploration and production company with that focuses entirely on its operations in the Marcellus Shale in Pennsylvania. At year-end 2023, Range Resources' proven reserves totaled 18.1 trillion cubic feet equivalent, with net production of 2.14 billion cubic feet equivalent per day. Natural gas accounted for 69% of production.

Chevron is an integrated energy company with exploration, production, and refining operations worldwide. It is the second-largest oil company in the United States with production of 3.1 million of barrels of oil equivalent a day, including 7.7 million cubic feet a day of natural gas and 1.8 million of barrels of liquids a day. Production activities take place in North America, South America, Europe, Africa, Asia, and Australia. Its refineries are in the US and Asia for total refining capacity of 1.8 million barrels of oil a day. Proven reserves at year-end 2023 stood at 11.1 billion barrels of oil equivalent, including 6.0 billion barrels of liquids and 30.4 trillion cubic feet of natural gas.

Hess is an independent oil and gas producer with key assets in the Bakken Shale, Guyana, the Gulf of Mexico, and Southeast Asia. At the end of 2023, the company reported net proved reserves of 1.4 billion barrels of oil equivalent. Net production averaged 391 thousand barrels of oil equivalent per day in 2023, at a ratio of 74% oil and natural gas liquids and 26% natural gas.