
Valued at a market cap of around $43 billion, Marathon Petroleum Corporation (MPC) is an integrated, downstream energy company. Based in Findlay, Ohio, the company operates through three segments: Refining & Marketing; Midstream; and Renewable Diesel.
Companies valued at $10 billion or more are generally labeled as “large-cap” stocks and Marathon Petroleum fits this criterion perfectly. The company operates the nation's largest refining system. It refines, markets, and distributes crude oil, transportation fuels, natural gas liquids, and renewable diesel.