Marathon is a supplier of gasoline and distillates to resellers and consumers within our market area in the Midwest, upper Great Plains, Gulf Coast and southeastern regions of the United States. The wholesale distribution of petroleum products to private brand marketers and to large commercial and industrial consumers and sales in the spot market accounted for 69 percent of our refined products sales volumes in 2007. We sold 49 percent of our gasoline volumes and 89 percent of our distillates volumes on a wholesale or spot market basis.

Sterling Energy plc was formed in October 2002 by the reversal of Sterling Energy Limited into Lepco plc, following which it was renamed Sterling Energy PLC. Oil and natural gas exploration and production company Sterling Energy is looking for sterling results from its operations in Africa (Cameroon, Gabon, Madagascar, and Mauritania) and the Middle East (Kurdistan). Sterling Energy has proved and probable reserves of more than 21.3 million barrels of oil equivalent. In 2009 Sterling Energy plc sold its interests in several producing gas fields in the Gulf of Mexico (where it also served as the operator for most of its projects) for $90 million, in order to focus on new opportunities on the African continent.

China Petrochemical (Sinopec Group) sees no sin in making a profit off fossil fuels. Asia's largest oil refiner operates businesses in oil and gas exploration and production; crude oil processing; oil products trading, transportation, distribution and marketing; and petrochemical products production, marketing and distribution through its main subsidiary China Petroleum & Chemical (Sinopec Corp.). The parent also participates in investment management, electrical and mechanical manufacturing, engineering, IT research and development, and importing and exporting as allowed by the State. Government controlled Sinopec Group works from nine offices in Europe, Asia, Russia, North America, and the Middle East.

Pan Andean Resources explores for and produces oil and gas from drilling operations in the US and South America. In the US Pan Andean Resources PLC produces gas from seven locations onshore and offshore Texas. In Bolivia Pan Andean Resources PLC produces oil and gas at the Monteagudo field, but taxes have made it difficult for the company to break even in costs. Pan Andean has also started an exploration project in Peru. Pan Andean Resources PLC has proved plus probable reserves of more than 3 million barrels of oil equivalent in the US (65% of all its total reserves are in Texas and the Gulf of Mexico) and more than 2 million barrels of oil equivalent in Bolivia and Peru. Pan Andean was formed in 1988.

Chevron is one of the world's largest integrated energy companies. Headquartered in San Ramon, California, Chevron U.K. Ltd conduct business in countries all around the globe. Chevron U.K. Ltd are engaged in every aspect of the crude oil and natural gas industry, including exploration and production, manufacturing, marketing and transportation, chemicals manufacturing and sales, geothermal, and power generation. Chevron U.K. Ltd also investing in renewables and advanced technologies. In 2008 two Britannia satellite fields (Callanish and Brodgar) began production. Chevron U.K. is also developing the North Sea-based Clair Field, in which it holds a 19% interest.

Enterra Energy Trust was founded in 1998 and is headquartered in Calgary, Canada with an additional office is in Carney, Oklahoma. Enterra Energy Trust, an open-end unincorporated investment trust, through its subsidiaries, engages in the exploration for and production of oil and gas in Canada and the United States. Enterra Energy Trust holds interests in various properties, including Clair, Provost-Alliance-Wainwright, Princess, and Ricinus in Alberta; Desan in British Columbia; and Liebenthal in Saskatchewan. Enterra Energy Trust also owns interests in properties located in Grant, Lincoln, and Logan counties in Oklahoma. As of December 31, 2008, Enterra Energy Trust had proved and probable reserves of 26,699 mboe.

Arctic Slope Regional Corporation (ASRC) was set up to manage 5 million acres on Alaska's North Slope after the Alaska Native Claims Settlement Act in 1971 cleared the way for oil development in the area. ASRC gets more than two-thirds of sales from its energy services subsidiary (ASRC Energy Services) and its petroleum refining and marketing unit (Petro Star). Other operations include construction, engineering, and governmental services. The family of companies of ASRC extends into the professional fields of engineering, financial management, oil and gas support services, petroleum refining and distribution, civil construction and communications.

Tengasco, Inc. engages in the exploration and production of oil and natural gas in Kansas and Tennessee. Tengasco, Inc. also leases producing and non-producing properties for exploration and development activities. In addition, Tengasco, Inc. owns and operates a 65-mile intrastate pipeline that transports natural gas to customers in Kingsport, Tennessee. Further, Tengasco, Inc. engages in developing and operating treatment and delivery facilities for the extraction of methane gas from non-conventional sources for delivery to natural gas customers through its pipeline system in Tennessee. Tengasco markets its crude oil principally to local refining companies, local utilities, and private industry end-users; and natural gas to local utilities, private industry end-users, and natural gas marketing companies. As of December 31, 2008, Tengasco, Inc. had 184 producing oil wells in Kansas; and 19 producing gas wells and 4 producing oil wells in Tennessee. Tengasco, Inc. was formerly known as Onasco Companies, Inc. and changed its name to Tengasco, Inc. in 1995 as a result of merger with Tengasco, Inc. Tengasco, Inc. was founded in 1916 and is based in Knoxville, Tennessee.

Now here's a company that pipes in the goods that keep the South fueled, naturally. Southern Natural Gas operates an 7,600-mile long natural gas pipeline (SNG System), which serves major markets across the southeastern US. This system transports more than 3 billion cu. ft. of natural gas per day. The SNG pipeline system has about 60 billion cu. ft. of underground working natural gas storage capacity. Major customers include Atlanta Gas Light Company, Alabama Gas, Southern Company, and SCANA. Southern Natural Gas is a part of El Paso Corporation's Pipeline Group.

Endeavour International Corporation was founded in 2000 and is based in Houston, Texas.Endeavour International Corporation, an independent energy company, focuses on the acquisition, exploration, and development of energy reserves in the North Sea and United States. Endeavour International Corporation has three major development projects in the United Kingdom sector of the North Sea and an exploration campaign onshore South Texas. As of December 31, 2008, it had proved reserves of 32,797 million cubic feet of natural gas; and 3,555 thousands of barrels of crude oil, condensate, and natural gas liquids.

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