Gary S. Grinsfelder

The Exploration Company of Delaware, Inc. is an energy company engaged in the acquisition, exploration, development and production of oil and gas properties. The company focuses on developing oil and gas reserves on properties located in Texas, particularly the Maverick Basin in southwest Texas. TXCO also owns properties in South Dakota, North Dakota and Montana. In addition, the Company's natural gas gathering system has grown to more than 90 miles of pipeline. It is located in San Antonio, TX.

Part of Chevron Corp., Union Oil Company of California, Inc. is a company that explores and markets petrol. The company is based in El Segundo, CA. Union Oil Company of California was acquired by Hilcorp Energy Co. from Chevron Corp. on January 01, 2012.

Escalera Resources Co. engages in the exploration, development, production and sale of natural gas and crude oil, primarily in Rocky Mountain Basins of the western United States. The company was founded in January 19, 2007 and is headquartered in Denver, CO.

Output Exploration LLC provides oil and gas exploration and production services using advanced geophysical technologies and innovative techniques. Its operations are on three regions the Sacramento Basin in California, the Anadarko Basin in Oklahoma, and the Gulf Coast Basin of Texas and Louisiana. The company was founded in 1992 and is located in Stafford, TX.

LeFrak Organization, Inc. owns, develops and manages real estate properties. It provides services to residential and office sectors. The company was founded by in 1901 and is headquartered in New York, NY.

The Independent Petroleum Association of America manufactures oil and natural gas. The non-profit company is based in Washington. Barry Russell has been the CEO of the American company since 1980.