Who are the majority owners of oil refineries in the US?

The majority owners of oil refineries in the U.S. are typically large integrated oil and gas companies, such as ExxonMobil, Chevron, and Phillips 66. Additionally, independent refiners like Valero Energy and Marathon Petroleum play significant roles in the market. Many of these companies not only operate refineries but also engage in upstream exploration and production, as well as downstream marketing and distribution. Overall, the refining sector is dominated by a mix of major oil corporations and independent firms.