Southwestern Energy is a natural gas exploration and production company organized in Delaware and headquartered in Spring, Texas. The company is ranked 642nd on the Fortune 500. In the 2018 Forbes Global 2000, Southwestern Energy was ranked at 1973, of the largest public companies in the world. The company's primary exploration and production activities are in the Appalachian Basin in Pennsylvania and West Virginia. The company also controls 2,518,519 net undeveloped acres in New Brunswick, Canada, which are subject to an indefinite moratorium on hydraulic fracturing and cannot be developed at this time.