NGL Energy Partners LP, through its subsidiaries, operates as a vertically-integrated energy company in the United States. The company operates in three segments: Midstream, Wholesale Supply and Marketing, and Retail Propane. The Midstream segment involves in the delivery of propane from pipelines or trucks to propane terminals and transfers the propane to third-party transport trucks for delivery to retailers, wholesalers, or other consumers in Illinois, Missouri, and New York. This segment owns three propane terminals located in East St. Louis, Illinois; Jefferson City, Missouri; and St. Catharines, Ontario. It serves 120 customers in Illinois, Missouri, and New York. The Wholesale Supply and Marketing segment provides propane procurement, storage, transportation, and supply services to approximately 500 customers in 30 states in the mid-continent, northeast, southeast regions of the United States. This segment serves refineries, national and regional distribution companies, and independent propane companies, as well as to national, regional and independent retail, industrial, wholesale, petrochemical, and propane production customers. Its services include shipping and maintaining storage on pipeline systems; and supplying to customers through terminals, refineries, third-party tank cars, and truck terminals. This segment also supplies propane and other natural gas liquids, primarily butane and natural gasoline. The Retail Propane segment markets, sells, and distributes propane to approximately 54,000 residential, agricultural, commercial, and industrial customers in Georgia, Illinois, Indiana, and Kansas. It operates 44 customer service locations and 37 satellite distribution locations. This segment also involves in the sale and lease of propane tanks, water conditioning equipment, and treatment supplies. NGL Energy Holdings LLC serves as the general partner of NGL Energy Partners LP. The company was founded in 1940 and is headquartered in Tulsa, Oklahoma.