Rex Energy Corporation operates as an independent oil and gas company in the Illinois Basin and the Appalachian Basin. The oil and gas exploration and production company has estimated proved reserves of 11 million barrels of oil equivalent, primarily from three regions: the Illinois Basin (in Illinois and Indiana) and the Appalachian Basin (Pennsylvania and West Virginia). Rex Energy Corporation owns interests in the Lawrence Field ASP Flood project, which is an oil recovery project located in Lawrence County, Illinois; and the Marcellus Shale drilling projects located in Pennsylvania in the Appalachian Basin. As of December 31, 2008, Rex Energy Corporation operated approximately 2,314 wells. Rex Energy Corporation has a joint venture agreement with Stonehenge Energy Resources, L.P. to build a high pressure gathering system and cryogenic gas processing plant in Butler County, Pennsylvania. Rex Energy Corporation was incorporated in 2007 and is headquartered in State College, Pennsylvania.

China Huaneng Group (CHNG) is one of China's five largest power conglomerates. China Huaneng Group oversees the national government's interests in 10 subsidiaries, including a 51% stake in Huaneng Power International. Through subsidiaries it develops and operates more than 85 thermal and hydro power plants. In addition to its power-generation business, China Huaneng Group plans to enter other sectors, including finance, transportation, information technology, and renewable energy. In 2008 CHNG acquired Singapore-based Tuas Power from Temasek Holdings for $4.2 billion.

Enerplus Resources Fund was founded in 1986 and is headquartered in Calgary, Canada. Enerplus Resources Fund, together with its subsidiaries, operates as an open-end investment trust. Enerplus Resources Fund owns a diversified portfolio of crude oil and natural gas producing properties in the provinces of Alberta, British Columbia, Saskatchewan, and Manitoba, western Canada; and in the states of Montana, North Dakota, Wyoming, and Utah, the United States. As of December 31, 2008, Enerplus Resources Fund had proved plus probable reserves of approximately 120,694 thousand barrels of light and medium crude oil; 45,929 thousand barrels of heavy crude oil; and 17,817 thousand barrels of natural gas liquids and 1,487,668 million cubic feet of natural gas.

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.

Fluxys makes gas flow -- the company derives its name from fluxus, the Latin word for flow. Fluxys transports natural gas throughout Western Europe. The company maintains and operates a natural gas transport network in Belgium comprised of 3,730 kilometers of pipeline, associated infrastructure, a terminal for liquefied natural gas, and an underground storage unit. Its network includes 17 points of connection to natural gas sources and to neighboring networks. It also has a 10% stake in Interconnector UK, the operator of the subsea pipeline between Zeebrugge and Bacton. Primary shareholders of Fluxys are Suez-Tractebel (57%); and Publigaz (31%).

Coulson Oil Company was founded in 1969 and is based in North Little Rock, Arkansas. Coulson Oil Company, Inc. distributes gasoline and diesel fuel to convenience stores and fuel outlets in Arkansas, Tennessee, and Oklahoma. It offers c-store equipment installation, repair, and maintenance services, as well as provides loading, hauling, and delivery services. The company involves in buying, selling, and leasing convenience stores and commercial properties. It also offers pump repair and calibration, RPZ and fuel line testing, line leak/line leak detector testing, environmental compliance assistance, HVAC and refrigeration installation and repair, and EPOS installation and repair services.

Abraxas Petroleum Corporation company was founded in 1977 and is based in San Antonio, Texas. Abraxas Petroleum Corporation (Abraxas) is an independent energy company primarily engaged in the development and production of natural gas and crude oil. At December 31, 2008, the Company’s properties are located in the Rocky Mountain, Mid-Continent, Permian Basin and Gulf Coast regions of the United States. On January 31, 2008, Abraxas Operating , LLC, a wholly owned subsidiary of the Partnership, consummated the acquisition of certain oil and gas properties located in various states from St. Mary Land & Exploration Company (St. Mary) and certain other sellers. In October 2009, Abraxas Petroleum Corporation closed the merger with Abraxas Energy Partners, L.P.

Repsol YPF, Spain's largest oil company. A fully integrated oil and gas company, Repsol YPF operates in Latin America, the Middle East, and North Africa. The firm controls YPF, Argentina's #1 oil company, and has operations in about 30 other countries. Repsol YPF operates five refineries in Spain and one in Peru and produces chemicals, plastics, and polymers. Repsol YPF sells gas under the brands Campsa, Petronor, and Repsol at more than 6,000 service stations in Europe and Latin America. Repsol YPF is one of Spain's largest sellers of liquefied petroleum gas and liquefied natural gas. In 2008 Repsol YPF reported estimated proved reserves of 2.2 billion barrels of oil equivalent.

NuStar GP Holdings, LLC (NYSE: NSH) owns general partner and limited partner interests in NuStar Energy L.P. (NYSE: NS), one of the nation's largest asphalt refiners and marketers and operators of petroleum product terminals and petroleum liquids pipelines. The general partner manages the business affairs of NuStar Energy L.P., which is a master limited partnership based in San Antonio, with 8,417 miles of pipeline, 82 terminal facilities and four crude oil storage facilities. It has assets strategically located in major U.S. markets and in the Netherlands Antilles, Canada, Mexico, the Netherlands and the United Kingdom. NuStar Energy L.P.'s asphalt refineries, refined product terminals, petroleum and specialty liquids storage and terminaling operations, and crude oil storage tank facilities are predominantly located on waterways that are easily accessible by barge or vessel. Altogether, these facilities have over 91 million barrels of storage capacity. NuStar Energy L.P.'s crude oil and refined products pipeline systems largely serve growing markets in the Mid-Continent, Southwest and Texas-Mexico border region of the United States.

Paramount Resources' paramount business is discovery and development of natural gas assets, which accounts for 75% of its production. Paramount Resources Ltd. explores for, develops, processes, markets, and transports natural gas and petroleum. Paramount Resources Ltd. has interests in more than 2.3 million gross acres, primarily in Alberta and elsewhere in Western Canada (the Northwest Territories and British Columbia) and the US (Montana an North Dakota). In 2008 Paramount Resources reported proved plus probable reserves of about 36.4 million barrels of oil equivalent. Company management, led by chairman and CEO Clayton Riddell, controls Paramount Resources.

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