Stephen A. Holditch

Triangle Petroleum Corp. engages in the business of exploring oil and natural gas. The company was founded on December 11, 2003 and is headquartered in Denver, CO.

Gastar Exploration LLC engaged in the exploration, development and production of oil, natural gas, condensate and natural gas liquids. Its principal business activities included the identification, acquisition, and subsequent exploration and development of oil and natural gas properties with an emphasis on unconventional reserves, such as shale resource plays. The company was founded by Thomas E. Robinson in 1987 and is headquartered in Houston, TX.

Oxane Materials, Inc. manufactures and markets ceramic proppants. It offers products in the areas of sour gas abatement technologies, PEM fuel cell membranes, and composite agents. The firm’s advanced ceramic proppants, travel more deeply and more uniformly into oil and gas formations than conventional proppants while also affording a more conductive channel for oil and gas to flow to the wellbore. The company was founded by Mark Wiesner, Christopher E. Coker, Gregory P. William and Andrew Barron in 2002 and is headquartered in Houston, TX.

Matador Petroleum Corp. previously engaged in exploring, developing, producing and selling of crude oil and natural gas products. Its name was changed to Matador Resources Co. following the sale of its assets to Tom Brown, Inc. It was headquartered in Dallas, TX.