W. Worth Carlin

Kerr-McGee Corp. is an energy and inorganic chemical. It subsidiaries, joint ventures and other affiliates have operations throughout the world. The company core business, which include exploration, production of oil and gas resources. It was founded in 1929 and is headquartered Oklahoma City, Ok

ETC Sunoco Holdings LLC engages in refining, marketing, and distributing of petroleum and petrochemical products. Its products include race fuels, related apparel, hats, collectibles, and limited branded merchandise. The company was founded by Joseph Newton Pew and Edward O. Emerson on March 27, 1886 and is headquartered in Newton Square, PA.

Ultra Petroleum Corp. engages in the development, production, operation, exploration, and acquisition of oil and natural gas properties. It focuses on developing a tight gas sand trend located in the Green River Basin of southwest Wyoming; and assessing, exploring, and developing its position in the Marcellus Shale and other horizons located in the north-central Pennsylvania area of the Appalachian Basin of Pennsylvania. The company was founded on November 14, 1979 and is headquartered in Englewood, CO.

Ovintiv USA, Inc. provides oil and gas exploration and production services. The company was founded in 2000 and is headquartered in Denver, CO.

Vantage Energy LLC operates as an independent oil and natural gas company, which engages in the acquisition, development, and exploration of oil and natural gas properties in the United States. The company was founded by Roger Biemans and Tom Tyree in December 2006 and is headquartered in Englewood, CO.

Vantage Energy II LLC acquires, explores and develops natural gas projects. It focuses on unconventional resources in the Appalachian Basin of the United States. The company was founded by Roger J. Biemans and Thomas B. Tyree, Jr. and is headquartered in Englewood, CO.