Sandy F. Vaughan

O-Tex Pumping LLC provided down hole cementing services. It specialized in quality cementing acidizing operations and pump down services. The company was founded in 2008 and was headquartered in Midland, TX.

ABN AMRO Asset Management (AAM) is the separately organized U.S. investment management business of ABN AMRO Holding NV (NYSE: ABN). AAM offers a line of global, regional and domestic investment strategies to institutional and individual investors worldwide as segregated accounts, as well as through ABN AMRO mutual funds. The firm is based in Chicago.

Part of JPMorgan Chase & Co., Houston Energy Group invests in North American power generation assets. The company is based in The Woodlands, TX.

Part of Koch Industries, Inc., Invista Equities LLC is a company that manufactures and sells nylon, polymers and fibers. The company is based in McPherson, KS.

White Deer Management LLC (White Deer Management) is a private equity firm founded in 2008 by Benjamin Allen Guill and Thomas Jeffery Edelman. The firm is headquartered in Houston, Texas with additional office in New York.

Part of White Deer Management LLC, Edelman & Guill Energy Ltd. is a company based in Houston, TX. Edelman & Guill Energy Ltd. was founded in 2008.