Troy A. Hoefer

Approach Resources, Inc. engages in the exploration, development, production, and acquisition of oil and gas properties. It focuses on oil and natural gas reserves in oil shale and tight sands located in the Permian Basin in West Texas. It holds interests in the East Texas Basin and the Chama Basin in Northern New Mexico. The firm operates in one business segment, the exploration and production of oil, NGLs and natural gas. The company was founded by J. Ross Craft in September 2002 and is headquartered in Fort Worth, TX.

Pioneer Natural Resources Co. operates as an independent oil and gas exploration and production company. The firm engages in hydrocarbon exploration in the Cline Shale. It focuses on the operation of the Permian Basin, Eagle Ford Shale, Rockies, and West Panhandle projects. The company was founded by Scott Douglas Sheffield on April 2, 1997, and is headquartered in Irving, TX.

Society of Petroleum Engineers, Inc. provides petroleum engineering services. The non-profit company is based in Allen, TX and has subsidiaries in United States, India and Canada.