GeoPetro Resources Company was incorporated in 1994 and is based in San Francisco, California. GeoPetro Resources Company, an oil and gas company, together with its subsidiaries, engages in the exploration for, and leasehold acquisition, development drilling, and production of crude oil and natural gas reserves in North America, Australia, and Indonesia. GeoPetro Resources Company's projects encompass approximately 379,547 gross acres, consisting of mineral leases, production sharing contracts, and exploration permits that provide the right to explore for, develop, and produce oil and natural gas. GeoPetro Resources Company was formerly known as GeoPetro Company and changed its name to GeoPetro Resources Company in June 1996 as a result of merger with its subsidiary, GeoPetro Resources Subsidiary Company.

Yangarra Resources Ltd. wants to yank some oil and natural gas from reserves in Western Canada. The exploration and production company (formed from the 2005 merger of TriOil and the former Yangarra Resources Inc.) has three core operating areas in the province of Alberta: Ferrier, Medicine Hat, and Jaslan. Yangarra Resources Ltd. also has noncore operations in Saskatchewan and other areas of Alberta. Yangarra Resources Ltd. has an inventory of more than 50 locations that are prospects for drilling. Yangarra Resources has proved and probable reserves of 2.9 million barrels of oil equivalent. In 2009 it filed for Canada's version of bankruptcy protection and then bought Athabaska Energy, which also produced natural gas in Alberta.

George E. Warren is a major private wholesale distributor of petroleum in the eastern US. Founded in Boston by George E. Warren in 1907 as a coal and oil distributor, George E. Warren Corporation moved to Florida in 1989. The company distributes product mostly by barge and pipeline, though George E. Warren Corporation uses some tank trucks as well. Warren has distribution facilities in the southeastern and southwestern US.George E. Warren Corporation distributes products including ethylene and heating oil to various industries. President and CEO Thomas Corr owns the company.

Petro Star built their first refinery in a matter of months and strategically positioned it along the Trans-Alaska Pipeline at North Pole. Here PSI could obtain crude oil directly from the pipeline and still enjoy all the commercial and transportation advantages available in Fairbanks.PSI soon acquired fuel distribution companies, including Sourdough Fuel in 1986, and began to distribute its products throughout Interior Alaska and the Arctic Slope, including Prudhoe Bay. Petro Star is an oil refining and fuel marketing shining star that brings heating fuel and energy (diesel, gasoline, and aviation and marine fuel)s to the citizens of the communities in the vast, cold, and lonely expanses of the US' largest state, Alaska. It operates refineries at North Pole and Valdez and distributes fuels and lubricants throughout Interior Alaska, Dutch Harbor, Kodiak, and Valdez. Started in 1984 by a group of petroleum industry veterans, the company built its first refinery operations along the Trans-Alaska Pipeline at North Pole, Alaska. Petro Star is a subsidiary of Arctic Slope Regional Corp..

Devon Energy Corporation was founded in 1971 and is based in Oklahoma City, Oklahoma.Devon Energy Corporation, together with its subsidiaries, primarily engages in oil and gas exploration, development, and production; the transportation of oil, gas, and natural gas liquids; and the processing of natural gas. Devon Energy Corporation owns oil and gas properties principally in the Mid-Continent area of the central and southern United States; the Permian Basin within Texas and New Mexico; the Rocky Mountains area of the United States; the offshore areas of the Gulf of Mexico; and the onshore areas of the Gulf Coast, principally in south Texas and south Louisiana. Devon Energy Corporation also owns oil and gas properties in the provinces of Alberta, British Columbia, and Saskatchewan, Canada. In addition, Devon Energy Corporation owns properties located in Azerbaijan, Brazil, and China. Further, Devon Energy's marketing and midstream operations include the marketing of oil, gas, and natural gas liquids, as well as the construction and operation of pipelines, storage and treating facilities, and gas processing plants in North America. As of December 31, 2008, Devon Energy Corporation had proved developed reserves of approximately 1,934 million barrel of oil equivalent. Devon Energy sells its gas production to various customers, including pipelines, utilities, gas marketing firms, industrial users, and local distribution companies; and crude oil production to refiners and remarketers.

Peninsula Petroleum Ltd is a major physical bunker and lubricant supplier at the ports of Gibraltar, Ceuta, Canary Islands and Panama and is active as a worldwide trader with annual sales in excess of 5,000,000 metric tonnes. Peninsula Petroleum guarantees high quality products and first-class customer care. From our offices in London, Gibraltar, Geneva, Tønsberg, Athens, Dubai, Singapore, Shanghai and Montevideo our staff bring the benefits of their experience and expertise to provide clients with a professional, cost-effective means of meeting their fuel requirements on a global basis.

Marathon Oil Company, founded in 1887, operates the upstream business of integrated oil concern Marathon Oil Corporation. Marathon Oil Company focuses on oil and gas exploration and production in eight countries (Angola, Equatorial Guinea, Gabon, Ireland, Libya, Norway, the UK, and the US). In 2007 Marathon Oil Company reported proved reserves of 650 million barrels of oil and 3.5 trillion cu. ft. of natural gas. That year Marathon Oil Company also drilled 6,900 oil wells and more than 5,300 gas wells and had about 22.4 million gross acres of landholding worldwide. Operating across the globe, Marathon is among the world’s leading integrated energy companies – applying innovative technologies to discover and develop valuable energy resources, providing high-quality products to the marketplace and delivering value to all of the Company’s stakeholders.

Castle Oil, the largest independent heating oil distribution outfit in the New York metropolitan area. The company predominantly delivers heating oil to around 10,000 commercial, industrial, and real estate development customers through a fleet of more than 100 vehicles; it also provides homeowner delivery. Castle Oil owns three deep-water storage terminals in the area. It also markets natural gas as an alternative heating fuel to some 3,000 clients. The company was founded by Mauro Romita Sr., and is now owned and run by his descendants.

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.

Amen Properties, Inc., a real estate and energy company, engages in the ownership and management of real estate, oil and gas royalties, and energy-related business ventures in the United States. The company, through its subsidiary, Priority Power Management, LLC, provides energy management and consulting services in the areas of energy information, supply and risk management, and demand-side management. Its energy supply management services include procurement, aggregation, portfolio management, utility tariff audits, risk management, renewable energy supply, strategy development, utility data analysis, supplier bill audits, contract management, metering solutions, and regulatory outlooking; energy information management services comprise utility bill processing and information access, energy bill analysis, and robust reporting; energy demand management consists of facility energy audits, capital projects, distributive generation, demand response programs, and efficiency projects; and energy risk management services encompass evaluatation of fundamental and technical factors, preparation of periodic reports for client management, and assistance in the identification, assessment, development, and implementation of a price risk management strategy. The company’s client base includes oil and gas companies, industrial manufacturing, healthcare, commercial real estate, institutional, governmental, food service, hospitality, retail, and financial services firms. In addition, Amen Properties owns commercial real estate properties located in Midland, Texas, as well as royalty and working interests in approximately 1,200 oil and gas properties in 12 states. The company was founded in 1993 and is based in Midland, Texas.

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