SM Energy Company, an independent energy company, engages in the acquisition, exploration, development, and production of crude oil and condensate, natural gas, and natural gas liquids in onshore North America. It primarily has operations in the Midland Basin and the Eagle Ford shale in Texas. As of December 31, 2017, the company had 468.1 million barrels of oil equivalent of estimated proved reserves; and working interests in 919 net productive oil wells and 489 net productive gas wells. 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.