Mark L. Grawe

EagleRidge Energy LLC engages in the exploration, development and production of oil and gas properties located in the Barnett Shale in North Texas. It owns and operates wells under lease in Denton and Wise counties. The company serves the oil and gas industry. The company was founded on February 11, 2009 and is headquartered in Dallas, TX.

Patara Holdings LLC explores and produces oil and gas. The company was founded on August 7, 2008 and is headquartered in Dallas, TX.

Patara Oil & Gas LLC engages in acquisition, development and production of natural gas and crude oil properties. The company is headquartered in Dallas, TX.

Part of Occidental Petroleum Corp., Union Pacific Resources, Inc. is a company that is involved in railroads, gas, and oil production. The company is based in Bethlehem, PA.

Part of Marathon Oil Corp., Texas Oil & Gas Corp. is an oil and gas exploration and American production company. Texas Oil & Gas was acquired by USX Corp. /Old/ on February 28, 1986 for $4,094.40 million.