Southwestern Energy Company, founded in 1929, explores, produces and distributes natural gas and oil throughout the United States, including Arkansas, Texas, Louisiana, New Mexico, and Oklahoma. The company conducts its exploration and production activities through its wholly owned subsidiaries, Southwestern Energy Production Company and SEECO. It has oil drilling operations in the Arkoma Basin and East Texas, and exploration facilities in New Mexico. The company s subsidiary, Arkansas Western Gas Company, distributes and transmits natural gas to more than 1 million residential, commercial and industrial customers in northern Arkansas. It also provides natural gas storage and transportation facilities to third-party clients. Southwestern Energy Company is headquartered in Houston.