Douglas H. Rook

Kraken Oil & Gas LLC explores, produces and develops oil and gas properties. It focuses on drilling and development opportunities in Montana and North Dakota primarily in the Williston Basin Bakken Shale play. The company was founded in 2012 and is headquartered in Houston, TX.

American Association of Professional Landmen consists of landmen and land-related persons throughout affiliated local associations in the United States and in Canada. It promotes standards of performance for all land professionals, which encourage responsible stewardship of energy and mineral resources. The company was founded on March 17, 1987 and is headquartered in Fort Worth, TX.

Rosetta Resources Inc. is an independent oil and gas exploration company, which engages in the acquisition and development of onshore energy resources in the U.S. The company also involves in the purchasing of new undeveloped leases, acquiring oil and gas producing properties and drilling prospects from third parties. Its operations are primarily located in the South Texas, including Eagle Ford shale and in the Southern Alberta Basin in Northwest Montana. The company was founded in June 2005 and is headquartered in Houston, TX.

Linn Energy, LLC engages in development, exploitation and acquisition of natural gas and oil. It seeks to be the operator of its properties so that it can develop drilling programs and projects. The company was founded by Michael C. Linn on March 14, 2003 and is headquartered in Houston, TX.

TXU Energy Services Co. LLC provides electricity supply and energy services. The company was founded on November 6, 2001 and is headquartered in Dallas, TX.

Part of Duke Energy Corp., Duke Energy Trading & Marketing LLC is an electric utility. The company is based in Charlotte, NC.

Part of KeyCorp, SONAT Exploration Co. is a company that provides petroleum exploration. The company is based in Houston, TX.