Marathon Petroleum Corporation is an integrated downstream energy company with two segments- Refining & Marketing, and Midstream, that primarily operates in the United States. The Refining & Marketing segment refines crude oil and manufactures related products for wholesale marketing customers in the US and internationally. The Midstream segment stores, distributes, and markets crude oil and refined products, transports natural gas, and operates jobber outlets across 37 US states, the District of Columbia, and Mexico.