What kind of company is marathon petroleum? Marathon Petroleum Corporation is a leading, integrated, downstream energy company headquartered in Findlay, Ohio. The company operates the nation’s largest refining system with more than 3 million barrels per day of crude oil capacity across 16 refineries.How do i contact marathon oil company by email? For royalty payment and ownership inquiries: Marathon Oil Company. Division Order. PO Box 2069. Houston, TX 77252-9755. Toll-Free: 888-522-8871. Fax: 713-296-4490. Email: [email protected]. What does mpc stand for in marathon petroleum? Marathon Petroleum Corporation (MPC) is a leading, integrated, downstream energy company headquartered in Findlay, Ohio. The company operates the nation's largest refining system. MPC's marketing system includes branded locations across the United States, including Marathon brand retail outlets.What is the stock symbol for marathon oil? Marathon Oil's common stock is traded on the New York Stock Exchange under the common stock symbol MRO. Below you'll find information on account access, registration, and how you can protect your shares and take advantage of solutions to simplify record keeping.