Robert Brain Carter

Ranger Oil Ltd. explores oil and gas properties. The company is located in Calgary, Canada.

Sterling Resources Ltd. engages in the exploration, appraisal, and development of crude oil and natural gas. It focuses on Peru, South America, in the Bretaña oil field. The company was founded by Robert G. Welty on August 31, 1979 and is headquartered in Houston, TX.

Cirrus Energy Corp. is engaged in petroleum and natural gas exploration, development, and production. Its holds a non-operated interest in the producing, onshore Coora oil field. The company was founded in 2002 and is headquartered in Calgary, Canada.

Vanguard Oil Corp. explores, produces and develops oil and gas properties. The company is headquartered in Calgary, Canada.

CYGAM Energy, Inc. explores and develops oil and gas properties. The firm currently conducts international activities through wholly-owned subsidiaries: Cygam Energy Italia S.p.A. in Italy and Rigo Oil Co. Tunisia Ltd. in Tunisia. It focuses on the acquisition, exploration and development of international oil and gas permits, primarily in Italy, Tunisia and the Mediterranean Basin. The company was founded on April 12, 1996 and is headquartered in Calgary, Canada.

One-Dyas UK Ltd. engages in the exploration for oil and natural gas. The company is headquartered in Westhill, the United Kingdom.

Asamera, Inc. is a Canadian company that produces oil and gas. It is a subsidiary of ConocoPhillips.