Chesapeake Energy Corporation, an independent exploration and production company, engages in the acquisition, exploration, and development of properties to produce oil, natural gas, and natural gas liquids from underground reservoirs in the United States. The company holds interests in natural gas resource plays in the Marcellus Shale in the northern Appalachian Basin in Pennsylvania and the Haynesville/Bossier Shales in northwestern Louisiana. The company was founded in 1989 and is headquartered in Oklahoma City, Oklahoma.