Brian E. Hiebert

ProspEx Resources Ltd. is a oil and natural gas company. It explores, develops and produces of oil and natural gas in western Canada. The company was founded in August 13, 2004 and is headquartered in Calgary, Canada

Part of Advantage Energy Ltd., MarkWest Resources Canada Corp explores for and produces oil and gas. MarkWest Resources Canada was acquired by Advantage Energy Income Fund from MarkWest Hydrocarbon LLC on December 02, 2003 for $77.77 million.

Chevron Canada Resources Ltd. engages in the exploration, development, production, and marketing of crude oil, natural gas, and natural gas liquids in Canada. The company was founded in 1938 and is headquartered in Calgary, Canada.

Part of Marathon Petroleum Corp., Watford Energy Ltd is a Canadian company that provides natural gas processing services. The company is based in Calgary, Canada. Watford Energy was acquired by MarkWest Hydrocarbon LLC, part of Marathon Petroleum Corp. from February 21, 2008 on August 13, 2001 for $30.02 million.

MarkWest Hydrocarbon LLC provides natural gas processing services. It also provides transportation, fractionation, and storage of natural gas liquids and transportation of crude oil. The company was founded by John M. Fox in April 1998 and is headquartered in Denver, CO.

Part of Marathon Petroleum Corp., Leland Energy Canada Ltd is a Canadian company that provides natural gas processing services. The company is based in Calgary, Canada. Leland Energy Canada was acquired by MarkWest Hydrocarbon LLC, part of Marathon Petroleum Corp. from February 21, 2008 on August 13, 2001 for $21.82 million.