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Sunoco Inc. is an American petroleum and petrochemical manufacturer headquartered in Philadelphia, Pennsylvania, United States, formerly known as Sun Company Inc. (1886–1920 and 1976–1998) and Sun Oil Co. (1920–1976). Sunoco is one of the largest gasoline distribution companies in the United States, with Sunoco brand gasoline being sold in over 4,700 outlets spanning 26 states, just over a third hosting convenience stores.
Rose Rock Midstream is a Tulsa, OK-based company in the Energy and Utilities sector.
Tec Well Service Inc. is one of the leading companies in the Energy and Utilities sector.
National Fuel Gas Distribution Corporation is one of the leading companies in the Energy and Utilities sector.