Marathon Petroleum

A leading downstream energy company, Marathon Petroleum serves as home to the nation’s largest refining system. The company was formerly a subsidiary of Marathon Oil but split off into its own corporation in 2011. Marathon Petroleum, which is also the nation’s largest independent refiner, sells refined products to wholesale marketing customers domestically and internationally, to buyers on the spot market, to independent entrepreneurs, and through long-term supply contracts with direct dealers around the world. In May 2021 the company completed the closing of its $21 billion sale of Speedway, its convenience store and gas station chain subsidiary, to 7-Eleven.