SemGroup, L.P., is a midstream service company providing the energy industry means to move products from the wellhead to the wholesale marketplace. SemGroup provides diversified services for end users and consumers of crude oil, natural gas, natural gas liquids, refined products and asphalt. Services include purchasing, selling, processing, transporting, terminaling and storing energy. SemGroup serves customers in the
United States, Canada, Mexico, Wales, Switzerland and Vietnam.