Randy Limbacher

Burlington Resources, Inc. explored, developed and produced oil and gas. The company is headquartered in Houston, TX.

CARBO Ceramics, Inc. is an oilfield services technology company. The firm manufactures and supplies ceramic proppant and resin-coated sand. It operates through the following segments: Oilfield and Industrial Technologies and Services; and Environmental Technologies and Services. The Oilfield and Industrial Technologies and Services segment manufactures and sells ceramic technology products and services, base ceramic proppant and frac sand for both the oilfield and industrial sectors. The Environmental Technologies and Services segment intends to protect operator?s assets and minimize environmental risks and lower lease operating expense. The company was founded in 1987 and is headquartered in Houston, TX.

Chrysaor Resources (UK) Holdings Ltd. used to explore crude oil and natural gas. It was an operating unit of Burlington Resource's International Division, which had offices in London and Houston. The company was headquartered in London, the United Kingdom.

Rosetta Resources Inc. is an independent oil and gas exploration company, which engages in the acquisition and development of onshore energy resources in the U.S. The company also involves in the purchasing of new undeveloped leases, acquiring oil and gas producing properties and drilling prospects from third parties. Its operations are primarily located in the South Texas, including Eagle Ford shale and in the Southern Alberta Basin in Northwest Montana. The company was founded in June 2005 and is headquartered in Houston, TX.

TransCanada PipeLines Ltd. provides pipeline services for the gas and oil industries. It operates through the following segments: Natural Gas Pipelines, Liquids Pipelines and Power and Storage. The company was founded on March 21, 1951 and is headquartered in Calgary, Canada.

Bruce Power LP operates nuclear power generating facilities. The firm is involved in the electricity wholesale market in Ontario and also sells electricity at the retail level in Ontario. The company was founded in 2001 and is headquartered in Tiverton, Canada.

Alta Mesa Holdings LP engages in the acquisition, exploration, development and production of oil, natural gas, and natural gas liquids within the United States. It specializes in engineering analytics and enhanced geological techniques including three-dimensional seismic analysis, and drilling, stimulation, completion, and production methods. The company was founded by Michael E. Ellis in 1987 and is headquartered in Houston, TX.