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ExxonMobil is an integrated oil and gas company that explores for, produces, and refines oil worldwide. In 2025, it produced 3.3 million barrels of liquids and 8.4 billion cubic feet of natural gas per day. At the end of 2025, reserves were 19.3 billion barrels of oil equivalent, 69% of which were liquids. The company is one of the world's largest refiners, with a total global refining capacity of 4.1 million barrels of oil per day, and is one of the world's largest manufacturers of commodity and specialty chemicals.

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 2025 worldwide net oil-equivalent production of 3.7 million barrels per day, including 8.5 billion cubic feet per day of natural gas and 2.3 million barrels of liquids per day. Production takes place in North America, South America, Europe, Africa, Asia, and Australia. The company's refining networks arelocated in the United States and Asia, with a total worldwide refining capacity of 1.8 million barrels of oil a day at year-end 2025. Net proved reserves at year-end 2025 stood at 10.6 billion barrels of oil equivalent, consisting of 5.7 billion barrels of liquids and 29.2 trillion cubic feet of natural gas.

Valero Energy is one of the largest independent refiners in the United States. It operates 15 refineries, with a total throughput capacity of 3.2 million barrels a day in the US, Canada, and the United Kingdom. Valero also owns 12 ethanol plants with capacity of 1.6 billion gallons a year and holds a 50% stake in Diamond Green Diesel, which can produce 1.2 billion gallons per year of renewable diesel.

The Vickers Top Buyers & Sellers is a daily report that identifies the five companies the largest insider purchase transactions based on the dollar value of the transactions as well as the five companies the largest insider sales transactions based on the dollar value of the transactions.