Marathon Petroleum Corporation is an American petroleum refining, marketing, and transportation company headquartered in Findlay, Ohio. It operates one of the largest refining systems in the United States, with multiple refineries processing crude oil into fuels and other petroleum products. The company engages in marketing through branded fuel stations such as Marathon and ARCO, serving retail and wholesale customers across various regions. Marathon Petroleum Corporation also manages extensive midstream infrastructure, including pipelines for petroleum, natural gas, and related products, along with railcars, barges, and terminals for efficient transportation and logistics. Additionally, it owns renewable fuels and feed facilities, renewable fuel pretreatment facilities, and a soy processing facility, supporting production of renewable diesel and biodiesel. Through its controlling interest in MPLX LP, a midstream master limited partnership, the company provides gathering, processing, fractionation, and storage services for crude oil and light products. Marathon Petroleum Corporation plays a vital role in the downstream energy sector, connecting refining operations with end-user markets nationwide.