Southwestern Energy Company is an independent energy company. The Company operates through two segments: Exploration and Production (E&P) and Marketing. It is engaged in the business of exploration and production of natural gas as well as associated natural gas liquids (NGLs) and oil in its core positions in the Appalachia and Haynesville natural gas basins in the United States. It is focused on the development of unconventional natural gas reservoirs located in Pennsylvania, West Virginia, Ohio and Louisiana. Its operations in Pennsylvania, West Virginia and Ohio (Appalachia) are primarily focused on the Marcellus Shale, the Utica and the Upper Devonian unconventional natural gas and liquids reservoirs. Its operations in Louisiana (Haynesville) are focused on the Haynesville and Bossier natural gas reservoirs. It operates a fleet of drilling rigs and has leased two pressure pumping spreads with a total capacity of 69,000 horsepower along with additional supporting pump down equipment.