Marathon Petroleum Corp is a leading energy company with a focus on refining and marketing petroleum products, including gasoline, diesel, and asphalt, across the United States. With refineries in key regions such as the Gulf Coast and West Coast, it supplies fuel to wholesale and retail customers, including Marathon branded outlets and ARCO brand locations. The company also has a Midstream segment that deals with the transportation and marketing of crude oil, natural gas, and natural gas liquids, ensuring a comprehensive approach to energy distribution.