Linn Energy, LLC was founded in 2003 and is headquartered in Houston, Texas. Linn Energy, LLC, through its subsidiaries, engages in the development and acquisition of gas and oil properties in the United States. Linn Energy, LLC has oil and gas, and natural gas reserves in Mid-Continent, which includes the Texas Panhandle operating area; and Western region comprising the Brea Olinda field of the Los Angeles Basin in California. As of December 31, 2007 the company had proved reserves of 1,945.5 billion cubic feet equivalent of oil and gas, and natural gas liquids. Linn Energy, LLC also operated 7,305 gross productive wells.

TGC Industries, Inc. provides geophysical services for clients in the oil and gas industry in the continental United States and Canada. TGC Industries, Inc. conducts Three-D surveys and offers seismic data acquisition services primarily to domestic onshore oil and natural gas exploration and development companies for use in the onshore drilling and production of oil and natural gas. TGC Industries, Inc. also owns a data bank that contains gravity data and magnetic data, from oil and natural gas producing areas located in the United States. As of December 31, 2009, TGC Industries operated 11 seismic crews, which supplied seismic data to companies engaged in the domestic exploration and development of oil and natural gas on land and in land-to-water transition areas. The company was formerly known as Tidelands Geophysical Co., Inc. and changed its name to TGC Industries, Inc. in July 1986. TGC Industries, Inc. was founded in 1967 and is headquartered in Plano, Texas.

Spindletop Oil & Gas Co. was founded in 1985 and is headquartered in Dallas, Texas. Spindletop Oil & Gas Co., an independent oil and gas company, engages in the exploration, development, and production of oil and natural gas in the United States. Spindletop Oil & Gas Co., through its subsidiaries, holds approximately 90,873 gross acres under lease in six states. Spindletop Oil & Gas Co. also engages in renting oilfield equipments, as well as in gathering and marketing of natural gas. In addition, Spindletop Oil & Gas Co. owns approximately 26.1 miles of pipelines located in Texas, which are used for gathering natural gas, as well as transporting natural gas produced by the company and third parties. As of December 31, 2008, its proved oil and gas reserves were 261,712 barrels of crude oil and condensate; and 13.76 billion cubic feet of natural gas. Spindletop Oil & Gas Co. sells its crude oil and natural gas to oil and gas companies, brokers, pipelines, and distributors.

Sibir Energy plc is a fully integrated independent energy company with exploration and production operations in Western Siberia and refining and marketing in the City of Moscow and the Moscow region. Since its creation in 1996, Sibir has grown its attributable reserves to over 680 million barrels (Russian classification A+B+C1+C2) and daily production to over 80,000 barrels of oil per day (bopd) making Sibir one of the largest UK-listed energy companies. In ten years of doing business in Russia, Sibir’s Western management team has partnered with its largest Russian shareholder to overcome the challenges of doing business in this dynamic market and has strengthened the company at each turn. Upstream, Sibir’s production comes from its Yuzhnoye field, operated by Magma Oil Company (95% Sibir owned), and its joint venture with Shell in the Shell-operated Salym group of fields (50% Sibir owned). Sibir’s total current production is over 80,000 barrels of oil per day (bopd), including its 50% of production from the Salym Fields and its wholly owned Magma production unit. By the end of 2009 Sibir’s total production is expected to exceed 100,000 bopd.

Hilcorp Energy, an oil and natural gas producer founded in 1989 by Jeffrey Hildebrand, is one of the nation's largest privately held energy companies. Hilcorp Energy Company employs the latest technology to extract oil and gas from mature fields that have been abandoned by other operators. Hilcorp Energy Company pumps about 25 million barrels of oil and natural gas equivalent annually and has proved reserves of 120 million barrels. A former Exxon Mobil geologist, Hildebrand started the company with former partner Thomas Hook.

Quicksilver Gas Services LP engages in gathering and processing natural gas and natural gas liquids on the Barnett Shale formation of the Fort Worth Basin located in north Texas. Quicksilver Gas Services LP provides its gathering and processing services to Quicksilver Resources Inc. and natural gas producers under fee-based contracts. As of December 31, 2008, Quicksilver Gas Services LP owned the Cowtown Pipeline, which consists of a pipeline gathering system and gas compression facilities in the southern portion of the Fort Worth Basin; and the Cowtown Plant that comprises two natural gas processing units, as well as the Corvette Plant, which consists of a natural gas processing unit in Hood County, Texas. Quicksilver Gas Services GP LLC serves as the general partner of Quicksilver Gas Services LP. Quicksilver Gas Services LP was founded in 2004 and is based in Fort Worth, Texas. Quicksilver Gas Services LP operates as a subsidiary of Quicksilver Resources Inc.

PSEG Power LLC, created in 1999, is the independent power production and energy marketing subsidiary of Public Service Enterprise Group (PSEG). The unit manages PSEG Nuclear LLC (operating the Salem and Hope Creek generating stations) and PSEG Fossil LLC (which includes gas, oil, coal, and natural gas) power plants. PSEG Power has installed capaity of about 13,700 MW. Its PSEG Energy Resources and Trade unit buys and sells wholesale power, natural gas, and other energy commodities throughout New England, Connecticut, Illinois, New Jersey, New York, Ohio, and Virginia.

Diaz is an oil and gas exploration and development company with land holdings and production in Canada and the United States. Diaz Resources Ltd. principal business is the exploration for and marketing of natural gas with the majority of the Company's revenue being generated from gas production in Alberta and Texas. Diaz Resources Ltd. also explores for hydrocarbons in Saskatchewan. Diaz Resources has exploration operations in the Deep Wilcox Trend of Texas and in the Harmattan area of Alberta. Diaz Resources Ltd. is also involved in a shallow gas infill program at the Enchant and Retlaw areas of Alberta. In 2006 Diaz Resources Ltd. reported proved and probable reserves of 27.8 billion cu. ft. of natural gas and 437,000 barrels of oil and condensate. Diaz Resources Ltd. current focus is on the development of a heavy oil pool near Lloydminster, Alberta, and oil exploration in Alberta and Saskatchewan.

Shell Global Solutions International BV was formed in 1998. Shell Global Solutions coordinates the operations of half a dozen of Royal Dutch Shell technology businesses worldwide. Shell Global Solutions International BV provides research and technical services to a range of petroleum-related industry segments including additive process industries; automotive manufacture and supply; exploration and production; chemicals; gas and LNG processing; motorsports; refining; oil marketing; and supply and distribution. Shell Global Solutions International BV services include chemical analysis, crude oil evaluation, engineering, energy optimization, gas-to-liquids conversion, gasification, hydrocracking, inspections, thermodynamics, and water treatment.

Equitrans, an indirect subsidiary of integrated natural gas behemoth EQT provides natural gas gathering, storage and transmission services through pipelines that connect to delivery points in Kentucky, Pennsylvania, and West Virginia. EQT formed Equitrans to forge a new relationship between pipelines and their markets, where customers were not passive recipients of natural gas, but active, discriminating buyers of energy services. Equitrans is expanding it operations in the lucrative Marcellus Shale play in West Virginia and Pennsylvania, to better serve growing natural gas demand in the Northeast.

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