Matthew Gallagher

Parsley Energy LP is an oil and gas company. It also engages in the drilling of oil and gas wells. The company was founded by Bryan Sheffield in 2008 and is headquartered in Midland, 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.

Pioneer Southwest Energy Partners LP was a master limited partnership, which owns and acquires oil and gas assets. The company's assets consist of non-operated working interests in producing wells in the Spraberry field in the Permian Basin of West Texas. Its area of operations consisted of onshore Texas and eight counties in the southeast region of New Mexico. Pioneer Southwest Energy Partners was founded in June 2007 and was headquartered in Irving, TX.

Parsley Energy, Inc. is an oil and natural gas company, which engages in the acquisition, development and exploitation of unconventional oil and natural gas reserves. Its portfolio includes Midland and Southern Delaware basin. The company was founded by Bryan Sheffield, Mike Hinson, and Paul Treadwell in 2008 and is headquartered in Austin, 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.

Permian Basin Petroleum Association engages in the oil and gas exploration. It provides a wide variety of membership services to producers, service companies, employees, affiliates and families. The company was founded in 1961 and is headquartered in Midland, TX.