Chesapeake Energy Corporation is an energy company based in Oklahoma City, Oklahoma, United States. It is primarily engaged in the exploration, development, and production of natural gas, oil, and natural gas liquids. The company was founded in 1989 and is one of the largest independent oil and natural gas producers in the United States. Chesapeake Energy has operations in various parts of the country, including the Appalachian Basin, the Permian Basin, and the Eagle Ford Shale. It also has a presence in international markets, including Canada, South America, and Australia. The company has faced financial challenges in recent years and has undergone significant restructuring.