John Christmann

Apache Corp. operates as an energy company, which engages in the exploration, development, and production of natural gas, crude oil, and natural gas liquids. The company was founded by Truman Anderson, Raymond Plank, and Charles Arnao on December 6, 1954 and is headquartered in Houston, TX.

Apache Offshore Investment Partnership operates as a holding company which conducts oil and gas development and production operations. The company was founded on October 31, 1983 and is headquartered in Houston, TX.

Part of Arco Alaska, Inc., Arco Oil & Gas Co. is a private company that produces and sells oil and gas. The company is based in Plano, TX.

Vastar Resources, Inc. is one of the largest independent oil and natural gas exploration and production companies in the United States. The company is active in approximately 80 fields in some of the nation's most prolific producing areas, including the Gulf of Mexico, the Gulf Coast, the Oklahoma/Arklatex and the Rockies/Hugoton regions. In addition, the company's drilling rigs are exploring for new reserves both onshore and in the promising shelf and deepwater Gulf of Mexico drilling plays, the latter the site of rising industry activity and excitement.