SM Energy Company, a prominent independent energy firm, has been actively involved in the acquisition, exploration, development, and production of oil, gas, and natural gas liquids in Texas, according to its website. The company also maintains working interests in oil and gas producing wells situated in the Midland Basin and South Texas. Prior to May 2010, the company was known as St. Mary Land & Exploration Company before it altered its name to SM Energy Company. Founded in 1908, the company is currently headquartered in Denver, Colorado.