Devon Energy Corporation, an independent energy company, engages primarily in exploration, development, and production of oil, natural gas, and natural gas liquids (NGLs). The company holds interest in various properties located in Rocky Mountains, Mid-Continent, Permian Basin, and Gulf Coast regions of the United States. It also owns oil and gas properties in Alberta, British Columbia, and Saskatchewan provinces of Canada. As of December 31, 2012, the company had total proved reserves of 2,963 million barrels of oil equivalent. It also operates approximately 25,000 wells. In addition, it offers marketing and midstream services, including selling of processed gas and NGLs, as well as natural gas processing plants, natural gas gathering systems, and oil pipelines. Devon Energy Corporation was founded in 1971 and is headquartered in Oklahoma City, Oklahoma.