SM Energy Company, an independent energy company, engages in the acquisition, exploration, development, and production of oil, gas, and natural gas liquids in the United States. The company holds working interests in oil and gas producing wells in the Midland Basin, South Texas, Uinta Basin, and DJ Basin. The company was formerly known as St. Mary Land & Exploration Company and changed its name to SM Energy Company in May 2010. SM Energy Company was founded in 1908 and is headquartered in Denver, Colorado.