Alan Clayton

Natural Gas Partners LLC (NGP) is a private equity firm, a subsidiary of NGP Energy Capital Management, LLC founded in 1988 by David Russell Albin and Kenneth Alfredo Hersh. The firm is headquartered in Dallas, Texas.

Southern Methodist University is a private university near the center of Dallas, SMU offers undergraduate, graduate, and professional programs through seven schools in the humanities and sciences, business, the performing, visual, and communication arts, engineering, education and human development, law, and theology.

Barclays Capital, Inc. is a registered broker/dealer headquartered in New York City. The firm was founded in 1997 and is a subsidiary of Barclays Group US, Inc., ultimately owned by Barclays plc (LON: BARC) in Great Britain. Barclays Capital provides large corporate, government and institutional clients a full spectrum of prime brokerage services which includes equities and fixed income financing, OTC Clearing, Futures and Foreign Exchange Prime Brokerage and access to industry insights and analytics from their Strategic Consulting team.

Main Street Capital Partners LLC(Main Street Capital Partners) is a private equity firm founded in 1990 by Vincent Foster. The firm is headquartered at Houston, Texas.