Chesapeake Energy Corporation, an independent exploration and production company, engages in the acquisition, exploration, and development of properties for the production of 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; and the liquids-rich resource play in the Eagle Ford Shale in South Texas. As of December 31, 2021, it owned interests in approximately 8,200 gross productive wells, including 6,500 wells with working interest and 1,700 wells with an overriding or royalty interest; and had estimated proved reserves of 661 million barrels of oil equivalent. The company was founded in 1989 and is headquartered in Oklahoma City, Oklahoma.