Matador Resources Company, an independent energy company, engages in the acquisition, exploration, development, and production of oil and natural gas resources in the United States. The company primarily focuses on oil and natural gas shale plays, and other unconventional resources. Its operations are located primarily in the Eagle Ford shale play in south Texas and the Haynesville shale play in northwest Louisiana and east Texas. The company also has acreage positions in southeast New Mexico and west Texas, and in southwest Wyoming and adjacent areas in Utah and Idaho. As of December 31, 2011, its estimated total proved reserves were 193.2 billion cubic feet of natural gas equivalents; and had properties, including approximately 51,000 gross acres and 29,000 net acres in the Eagle Ford shale play in Atascosa, DeWitt, Dimmit, Karnes, LaSalle, Gonzales, Webb, Wilson, and Zavala counties in south Texas. The company was formerly known as Matador Holdco, Inc. and changed its name to Matador Resources Company in August 2011. Matador Resources Company was founded in 2003 and is headquartered in Dallas, Texas.