Louis Scott Biar

Stewart & Stevenson Services, Inc. is a manufacturer and marketer of specialized equipment and provider of aftermarket parts and service to the oil and gas and other industries. The company's product offerings include equipment for well stimulation, well workover and service, drilling, coiled tubing, cementing, nitrogen pumping, power generation and electrical systems as well as engines, transmissions and material handling equipment. Stewart & Stevenson was founded in 1902 and is headquartered in Houston, TX.

BJ Services Co. LLC engages in the provision of pressure pumping, cementing, stimulation, and coiled tubing services. The company was founded on May 30, 1990 and is headquartered in Houston, TX.

OHA Investment Corp. is a closed-end, non-diversified management investment company. Its investment objective is to generate both current income and capital appreciation primarily through debt investments, some of which may include equity components. The company was founded in July 2004 and is headquartered in New York, NY.

Founded in 2004, NGP Capital Management is a private equity firm located in Houston, Texas. The firm manages NGP Capital Resources Company (Nasdaq: NGPC), a closed-end, non-diversified management investment company that is regulated as a Business Development Company under the Investment Company Act of 1940 and is a Regulated Investment Company under the Internal Revenue Code.

Part of NGP Energy Capital Management, LLC, NGP Investment Advisor LP provides investment advice. The company is based in Houston, TX. The CEO of the company is Steve K. Gardner.

NGP Energy Capital Management LLC operates as a private equity firm in the natural resources industry. It considers investment in companies specializing in the oil and gas acquisitions and exploitation; oil and gas development drilling; midstream acquisitions and development opportunities; and oil and gas minerals and royalties. The company was founded by Kenneth Alfredo Hersh and David Russell Albin in 1988 and is headquartered in Dallas, TX.