Southwestern Energy Company is an independent energy company. The Company operates through two segments: Exploration and Production (E&P) and Marketing. The Company is engaged in the exploration and production of natural gas, oil and Natural gas liquids (NGLs), with operations focused on the development of unconventional natural gas and oil reservoirs located in Pennsylvania, West Virginia and Ohio. The Company’s operations in northeast Pennsylvania are primarily focused on the unconventional natural gas reservoir known as the Marcellus Shale. Operations in West Virginia, Ohio and southwest Pennsylvania, are focused on the Marcellus Shale, the Utica and the Upper Devonian unconventional natural gas and oil reservoirs. It also operates drilling rigs located in Appalachia. The Company's marketing activities capture opportunities that arise through the marketing and transportation of natural gas, oil and NGLs primarily produced in its E&P operations.