Southwestern Energy Company is an integrated energy company headquartered in Houston, Texas, primarily focused on the exploration for and production of natural gas.

Southwestern is engaged in natural gas and oil exploration, development and production in Arkansas, Oklahoma, Texas, New Mexico, and Louisiana. At December 31, 2007, the Company's proved oil and gas reserves totaled 1,450 Bcf equivalent, of which approximately 96% were natural gas. The Company primarily conducts its exploration and production activities through its wholly-owned subsidiaries, Southwestern Energy Production Company and SEECO, Inc.

The Company's Midstream Services segment generates revenue through the marketing of its own gas production and some third-party natural gas and from gathering fees associated with the transportation of natural gas to market. The Company's gas marketing subsidiary, Southwestern Energy Services Company, enables the Company to capture downstream opportunities which arise through marketing and transportation activity. In 2004, the Company formed a new subsidiary, DeSoto Gathering Company, L.L.C., to engage in gathering activities related to the development of the Fayetteville Shale play.