Antero Resources is an independent exploration and production company engaged in the acquisition, development, and production of unconventional natural gas resources in the United States. Unconventional play types for Antero include tight sands and fractured shales. The company was fromed in 2002 by Paul M. Rady and Glen Warren following their success with Pennaco Energy. Corporate headquarters are located in Denver, Colorado. Antero Resources Corporation operates as a subsidiary of XTO Energy Inc.