The Speedway LLC retail chain, which includes approximately 4,000 retail outlets, is the second largest chain of company-owned and operated retail gasoline and convenience stores in the United States[5]. Leasehold or ownership interests in approximately 8,400 miles (13,500 km) of petroleum pipelines and 5,000 miles (8,050 km) of natural gas and natural gas liquids pipelines as well as related transportation and distribution assets such as railcars, barges, and processing terminals. A 20.4% interest, including a controlling 2% general partner interest, in MPLX, a public master limited partnership that owns pipelines and other midstream assets related to the transportation and storage of crude oil.