Stone Energy Corporation was founded in 1993 and is headquartered in Lafayette, Louisiana with additional offices in Houston, Texas, and Morgantown, West Virginia. Stone Energy Corporation engages in the acquisition, exploration, development, operation, and production of oil and gas properties located in the Gulf of Mexico and Appalachia region. As of December 31, 2008, Stone Energy Corporation had estimated proved oil and natural gas reserves of approximately 518.9 Bcfe.With rising oil prices Stone Energy Corporation has been able to acquire more properties. Stone Energy Corporation has sold the bulk of its Rocky Mountain oil and gas properties in order to focus its energy on targeting reserves and production in the deep shelf and deep water areas of the Gulf of Mexico. In 2008 the company acquired fellow Gulf explorer Bois d'Arc Energy for about $1.7 billion.

Bill Barrett Corporation was founded in 2002 and is headquartered in Denver, Colorado. Bill Barrett Corporation, an independent oil and gas company, engages in the exploration, development, and production of natural gas and crude oil in the Wind River, Uinta, Piceance, Powder River, Big Horn, and Paradox Basins and the Montana Overthrusts. Barrett holds about 1.2 million net undeveloped leasehold acres. Some 90% of the company's properties are unconventional resources, such as coal bed methane and shale gas. In 2008 the oil and gas firm had working interests in 950 drilling locations and had estimated net proved reserves of 818.3 billion cu. ft. of natural gas equivalent. Bill Barrett Corporation also directly operates 97% of its net production.

Part of a network of companies that was founded by a samurai centuries ago, Mitsui & Co. battles to make money. Mitsui & Co., a leading Japanese general trading firm, has more than 700 subsidiaries in a wide range of industries. The company has reorganized its business units into eight main classifications: chemicals, electronics and information, energy, foods, iron and steel, non-ferrous metals, textiles, and machinery. Mitsui & Co. is part of Mitsui Group, one of Japan's largest "keiretsu" (companies loosely connected through cross-ownership). The company's largest revenue generators are its trading activities in the energy and chemical sectors.

SK Energy (formerly SK Corp.) is the energy and chemical affiliate of South Korea's SK Group, which also operates trading and telecommunications units. Korea's largest oil refiner (1.1 million barrels of daily refining capacity), SK Energy controls about 35% of Korea's fuel retailing market and operates 4,270 service stations. The firm is involved in oil exploration and production in 15 countries and has proved reserves 500 million barrels of oil equivalent. SK Energy imports coal and liquid petroleum gas (LPG), and claims a 44% share of the Korean LPG market. SK Energy supplies natural gas to Seoul and other cities in Korea. The company also makes lubricants, low-pollutant gasoline, and petrochemicals.

Cudd Energy Services began operations in 1977 uder the name Cudd Pressure Control, Inc. in Woodward, Oklahoma with eight employees and a hydraulic snubbing unit. The level of activity was high in Western Oklahoma which allowed for immediate growth. A second snubbing unit was added in this region and then a third in Rock Springs, Wyoming in 1978. Expansion into Texas and Louisiana followed in 1979 with the acquisition of several other companies. Cudd Energy Services, a subsidiary of RPC, provides coil tubing injections, snubbing (a process used to repair damaged tubing in high-pressure wells), wireline, well control, and well pumping services to oil and gas companies operating worldwide. The oilfield services company's portfolio of equipment consists of coiled tubing units, snubbing units, nitrogen units, wireline units, fluid pumps, and lift boats. Cudd Energy Services' customers include Chevron, Exxon Mobil, Houston Exploration, and Shell.

Tesoro Refining and Marketing manages the refining and marketing businesses of Tesoro Corporation. The parent company's seven refineries have a capacity of 658,000 barrels per day and produce a range of motor fuels and other petroleum products. Tesoro Refining and Marketing markets fuel to 880 branded retail gas stations (including 290 company-owned stations under the Tesoro, Shell, Mirastar, and USA Gasoline brands), in Alaska, Hawaii, and 15 western states. On the wholesale side, it markets 643,000 barrels of oil products per day. It also supplies jet fuel to the vast majority of commercial airlines with routes in the West.

Legacy Reserves LP was founded in 2005 and is headquartered in Midland, Texas. Legacy Reserves LP, an independent oil and natural gas limited partnership, engages in the acquisition and development of oil and natural gas properties, primarily located in the Permian Basin and Mid-continent regions of the United States. As of December 31, 2008, Legacy Reserves LP had proved reserves of approximately 30.8 million barrels of crude oil equivalent. Legacy Reserves LP owned interests in producing oil and natural gas properties in 270 fields in the Permian Basin, Texas Panhandle, Oklahoma, and various other states; operated 1,603 gross productive wells; and owned non-operated interests in 2,247 gross productive wells. Legacy Reserves GP, LLC serves as the general partner of Legacy Reserves LP.

Vero Energy Inc. is a Calgary based, growth oriented company engaged in the exploration, development and production of natural gas, natural gas liquids and oil in Western Canada. Since its inception in November of 2005, Vero has achieved significant growth in: production and production per share; cash flow and cash flow per share; reserves and reserves per share. Vero is committed to growing mainly through the drill bit, but also explores prudent acquisition opportunities that are a strategic fit. Vero has a solid land base of over 149,000 net undeveloped acres and over 280 drilling locations. Vero Energy Inc. produces more than 8,000 boe/d (barrels of oil equivalent per day), with natural gas products constituting about 80% of total production. Vero Energy Inc. has more than 175,000 acres of undeveloped land and about 245 drilling locations, but its core operations are located in Edson, where it controls about 32,000 acres; it also has major operations in Corbett. Vero Energy Inc. was founded in 2005.

Petrel Resources is incorporated in Ireland. Petrel Resources plc had signed a working agreement to explore Block 6 in Iraq's Western Desert during the reign of Saddam Hussein. Following the fall of Saddam, Petrel Resources has been seeking an agreement to develop three existing oil fields in Southern Iraq, while Petrel Resources plc renegotiates its Western Desert arrangements with the Iraqi government. Petrel Resources plc secured the first and largest contract awarded since 2003 by the Iraqi Ministry of Oil. Its core interest since 1999 has been the Subbha & Luhais project. Petrel Resources plc also has exploration interests in Jordan and Syria. Petrel Resources was founded in 1982 as Kish Developments.

TransGlobe Energy Corporation was founded in 1968 and is headquartered in Calgary, Canada. TransGlobe Energy Corporation engages in the exploration, development, and production of crude oil, natural gas liquids, and natural gas the Arab Republic of Egypt and the Republic of Yemen. TransGlobe Energy Corporation has interests in two production sharing concessions in Egypt; and five production sharing agreements in Yemen. The company was formerly known as Dusty Mac Mines, Ltd. and changed its name to TransGlobe Energy Corporation in April 1996 as a result of its business focus shift from mineral exploration and extraction to oil and gas business. TransGlobe Energy Corporation has interests in seven international blocks totaling 4.9 million acres, with active programs of exploration and development drilling underway.

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