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MURPHY OIL CORPORATION (MUR)

Murphy Oil Corporation operates as a holding company that engages in the exploration, production, refining, and marketing of oil and gas worldwide. Its activities are segregated into Exploration and Production, and Refining and Marketing divisions. The Exploration and Production division explores for and produces crude oil, natural gas, and natural gas liquids worldwide. The Refining and Marketing division primarily consists of operations that refine crude oil and other feedstocks into petroleum products, such as gasoline and distillates; buy and sell crude oil and refined products; and transport and market petroleum products. The company has an interest in a Canadian synthetic oil operation, owns two petroleum refineries in the United States, and has an interest in a refinery in the United Kingdom. As of December 31, 2004, Murphy Oil owned 661 gross and 328 net oil-producing wells, and 202 gross and 88 net gas producing wells. The company markets petroleum products under various brand names and to unbranded wholesale customers in North America and the United Kingdom. Murphy Oil was incorporated in 1950 as Murphy Corporation and changed its name to Murphy Oil Corporation in 1964. The company is based El Dorado, Arkansas.


SASOL LTD (SSL)

Sasol Limited, through its subsidiaries, operates as an integrated oil and gas company. It engages in exploring and producing crude oil offshore of Gabon; refining crude oil into liquid fuels in South Africa; and the retail of liquid fuels and lubricants through a network of retail service centers. It primarily offers liquid and gaseous fuels, including gasoline, diesel, jet fuel, fuel alcohol, illuminating paraffin, fuel oils, and liquefied petroleum gas, as well as lubricants. The company also produces and markets chemicals and synthetic fuels. Sasol manufactures syngas from natural gas and low-grade coal, as well as converts syngas into a range of products, including synfuels, chemical feedstock, and industrial pipeline gas; surfactants; surfactant intermediates, including alcohols and alkylates; monomers; and inorganic specialty chemicals derived mostly from coal and chemical feedstocks. In addition, it engages in the production and marketing of ethylene and propylene monomers, polypropylene, polyethylene, and polyvinyl chloride polymers, as well as a range of oxygenated solvents. Further, Sasol also involves in international petroleum and gas exploration and production; coal mining; and wax, fertilizer, and explosive products production. The company offers its products worldwide. Sasol was established in 1950 and is headquartered in Rosebank, South Africa.


FRONTIER OIL CORPORATION (FTO)

Frontier Oil Corporation (FOC), an energy company, engages in crude oil refining and the wholesale marketing of refined petroleum products. The company purchases crude oil to be refined and markets the refined petroleum products, including various grades of gasoline, diesel fuel, jet fuel, asphalt, chemicals, and petroleum coke. It operates refineries in Cheyenne, Wyoming and El Dorado, Kansas. The gasoline and diesel produced by Cheyenne refinery are primarily shipped via pipeline to terminals for distribution by truck or rail. The pipeline shipments from the Cheyenne refinery are handled mainly by the Kaneb pipeline, serving Denver and Colorado Springs, Colorado; and the ConocoPhillips pipeline, serving Sidney, Nebraska. The primary markets for the El Dorado refinery's refined products are Colorado and the Plains States, which include the Kansas City metropolitan area. The gasoline, diesel, and jet fuel produced by this refinery are primarily shipped via pipeline to terminals for distribution by truck or rail. The Kaneb pipeline serves the northern Plains States; the Magellan pipeline Denver, Colorado; and the Magellan pipeline serves Kansas City and Carthage, Missouri and Des Moines, Iowa. FOC also owns FGI, LLC, an asphalt terminal and storage facility in Grand Island, Nebraska. Frontier Oil, formerly known as Wainoco Oil Corporation, was incorporated in 1949 and is headquartered in Houston, Texas.


HESS CORPORATION (HES)

Hess Corporation, together with its subsidiaries, engages in the exploration, development, production, purchase, transportation, and sale of crude oil and natural gas. The company also manufactures, purchases, transports, trades, and markets refined petroleum, natural gas, and electricity, as well as offers distributed-electricity generating equipment to industrial and commercial customers. In addition, it owns a refinery through a 50% joint venture with HOVENSA L.L.C., as well as terminals and retail gasoline stations. The company markets its refined petroleum products to motoring public, wholesale distributors, petroleum companies, governmental agencies, and public utilities; and natural gas and electricity to utilities and other industrial and commercial customers. As of December 31, 2006, Hess Corporation had approximately 832 millions of barrels of crude oil and natural gas liquids; and 2,466 millions of thousand cubic feet of natural gas, as well as 1,350 HESS gasoline stations. The company was founded in 1920. It was formerly known as Amerada Hess Corporation and changed its name to Hess Corporation in 2006. Hess Corporation is based in New York, New York.


WESTERN REFINING INC (WNR)

Western Refining, Inc., through its subsidiary, Western Refining LP, operates as an independent crude oil refiner and marketer of refined products. It refines crude oil into gasoline, diesel fuels, jet fuel, asphalt, and other refined products; and sells refined products purchased from third parties. Western Refining operates primarily in the southwest region of the United States, including Arizona, New Mexico, and West Texas. The company was founded in 1993 and is headquartered in El Paso, Texas.


TESORO PETROLEUM CORPORATION (TSO)

Tesoro Corporation and its subsidiaries engage in refining and marketing petroleum products in the United States. The company operates in two segments, Refining and Retail. The Refining segment owns and operates six petroleum refineries located in California, Washington, Hawaii, Alaska, North Dakota, and Utah. It manufactures various products, including gasoline and gasoline blendstocks, jet fuel, diesel fuel, and heavy fuel oils for sale to various commercial customers in the midcontinental and western United States. The company's Retail segment distributes motor fuels to wholesale and retail customers, as well as to commercial end-users through a network of gas stations primarily under the Tesoro and Mirastar brand names. It sells gasoline and diesel fuel to retail customers through company operated retail stations and branded jobber/dealers in the midcontinental and western United States. As of December 31, 2004, Retail segment included a network of 506 retail stations, which comprised 214 company operated retail gasoline stations and 292 jobber/dealer stations. Tesoro was founded in 1939. It was formerly known as Tesoro Petroleum Corporation and changed its name to Tesoro Corporation in November 2004. Tesoro is headquartered in San Antonio, Texas.


INTEROIL CORP (IOC)

InterOil Corporation, a vertically-integrated energy company, engages in the exploration and development of oil and gas properties in Papua New Guinea. InterOil conducts its operations through three segments: Exploration and Production, Refining and Marketing, and Wholesales and Retail Distribution. The Exploration and Production segment engages in the exploration and production of crude oil and natural gas. It owns approximately eight million acres of exploration licenses. The majority of these licenses are located onshore in the eastern Papuan Basin. The Refining and Marketing segment includes the refining of crude oil and the marketing of refined products. The Wholesales and Retail Distribution segment includes wholesale and retail distribution of refined products in Papua New Guinea. InterOil was founded in 1990 and is based in Cairns, Australia.


IMPERIAL OIL LIMITED (IMO)

Imperial Oil Limited operates as an integrated oil company in Canada. The company engages in the exploration, production, and sale of crude oil and natural gas, including upgraded crude oil and crude bitumen; owns and operates four refineries; owns and operates crude oil, natural gas liquids, and products pipelines in Alberta, Manitoba, and Ontario; and markets approximately 700 petroleum products throughout Canada. It also sells gasoline; heating, diesel, and jet fuels; heavy fuel oils; and lube oils and other products to large industrial and commercial accounts, as well as to other refiners and marketers. The company sells its petroleum products through approximately 2,000 Esso service stations, of which about 720 are company owned or leased. In addition, Imperial Oil manufactures and markets various chemicals, including ethylene, benzene, aromatic and aliphatic solvents, plasticizer intermediates, and polyethylene resin. The company was incorporated in 1880 and is headquartered in Toronto, Canada.


DELEK US HOLDINGS INC (DK)

Delek US Holdings, Inc., through its subsidiaries, engages in the refining and marketing of petroleum products in the United States. It operates through three segments: Refining, Marketing, and Retail. The Refining segment operates a refinery in Tyler, Texas, with a design crude distillation capacity of 60,000 barrels per day, along with an associated crude oil pipeline and light products loading facilities. This segment produces and sells gasoline, diesel, jet fuels, liquefied petroleum gas, and natural gas liquids, as well as petrochemicals, such as propane, refinery grade propylene, and butanes; and other products, including anode grade coke, slurry oil, sulfur, and other blendstocks. Its customers include oil companies, independent refiners and marketers, jobbers, distributors, utility and transportation companies, and independent retail fuel operators. The Marketing segment sells refined products on a wholesale basis in west Texas through company-owned and third party operated terminals. The Retail segment markets gasoline, diesel, and other refined petroleum products, as well as food, beverages, and convenience merchandise, such as tobacco products, dairy products, and groceries through company-operated retail fuel and convenience stores under the MAPCO Express', MAPCO Mart', East Coast', Fast Food and Fuel', and Discount Food Mart' brand names. As of December 31, 2006, this segment operated a network of 394 company-operated retail fuel and convenience stores in Alabama, Arkansas, Georgia, Kentucky, Louisiana, Mississippi, Tennessee, and Virginia. The company was founded in 2001 and is headquartered in Brentwood, Tennessee. Delek US Holdings, Inc. is a subsidiary of Delek Group, Ltd.


CALUMET SPECIALTY PRODUCTS PARTNERS L.P (CLMT)

Calumet Specialty Products Partners, L.P. operates as an independent producer of specialty hydrocarbon products in North America. It has two segments, Specialty Products and Fuel Products. The Specialty Products segment processes crude oil into various customized lubricating oils, including process oils, base oils, transformer oils, and refrigeration oils used in various industrial and automotive applications; solvents that are used in the manufacture of paints, cleaners, and automotive products; and waxes. This segment sells its products to customers, who purchase them primarily as raw material components for basic industrial, consumer, and automotive goods. The Fuel Products segment processes crude oil into various fuel and fuel-related products, including unleaded gasoline, diesel, and jet fuel. In addition, the company also produces asphalt and other by-products that can be processed or blended for coating and roofing applications; and fuel-related products, including fluid catalytic cracking feedstock, asphalt vacuum residual, and mixed butanes. Calumet GP, LLC serves as the general partner of the company. The company is based in Indianapolis, Indiana.


PETRO-CANADA (PCZ)

Petro-Canada, an oil and gas company, provides petroleum products and services in Canada. The company operates in the upstream and downstream sectors of oil and gas industry. Its upstream sector explores for, develops, produces, and markets crude oil, natural gas liquids (NGL), and natural gas in Canada and internationally. This sector involves in the exploration and production of natural gas in western Canada and the U.S. Rockies; marketing of natural gas in North America; exploration, development, and production of crude oil offshore Newfoundland and Labrador; and development and production of bitumen and synthetic crude oil in northeastern Alberta. It also explores, develops, produces, and markets oil and natural gas in northwest Europe, North Africa, and northern Latin America. The company's downstream sector refines crude oil and other feedstocks, as well as markets and distributes petroleum products, and related goods and services in Canada. This sector produces a range of refined petroleum products, such as gasoline, diesel oils, heating oils, aviation fuels, heavy fuel oils, asphalts, petrochemicals, and feedstocks for lubricants; and distributes refined products to retail outlets, and commercial and industrial customers. The company markets its own petroleum products and third parties products, through its retail outlets to farm, home heating, paving, small industrial, commercial, and truck markets. In addition, it offers various services, such as convenience stores, car washes, automotive repair, and maintenance services. As of December 31, 2004, Petro-Canada's network of retail sites consisted of 1,375 outlets in Canada, of which 863 were company controlled. The company is headquartered in Calgary, Canada.


MARATHON OIL CORPORATION (MRO)

Marathon Oil Corporation, through its subsidiaries, primarily engages in the energy business. The company operates in three segments: Exploration and Production (EP); Refining, Marketing, and Transportation (RMT); and Integrated Gas (IG). The EP segment engages in the exploration, development, and production of liquid hydrocarbon and natural gas in the United States, Norway, Angola, Equatorial Guinea, Canada, the United Kingdom, Ireland, and Russia. As of December 31, 2004, its net proved liquid hydrocarbon and natural gas reserves totaled approximately 1.139 billion barrels of oil equivalent. The RMT segment owns and operates seven refineries, which include crude oil atmospheric and vacuum distillation, fluid catalytic cracking, catalytic reforming, desulfurization, and sulfur recovery units. These refineries process various crude oils and produce typical refinery products, including reformulated gasoline. This segment also produces asphalt cements, polymerized asphalt, asphalt emulsions, and industrial asphalts, as well as manufactures petroleum pitch, aromatics, aliphatic hydrocarbons, cumene, base lube oil, polymer grade propylene, and slack wax. It markets its products to home heating, industrial, and chemical industries, as well as to contractors, government entities, and manufacturers. The IG segment's operations include natural gas liquefication and regasification operations, methanol operations, certain other gas processing facilities and pipeline operations, and marketing and transportation of natural gas. The company was founded in 1887 by Henry M. Ernst under the name The Ohio Oil Company. It changed its name to Marathon Oil Company in 1962. The company further changed its name to Marathon Oil Corporation in October 2001, following the spin-off of its steel and steel-related business. Marathon Oil Corporation is headquartered in Houston, Texas.


VALERO ENERGY CORPORATION (VLO)

Valero Energy Corporation operates as a refining and marketing company. It also produces a slate of gasolines, distillates, jet fuel, asphalt, petrochemicals, low-sulfur diesel fuel, and oxygenates. The company operates in two segments, Refining and Retail. The Refining segment includes refining operations, wholesale marketing, product supply and distribution, and transportation operations. This segment is segregated geographically into the Gulf Coast, Mid-Continent, West Coast, and northeast regions. As of September 22, 2005, the company owned and operated 18 refineries in the United States, Canada, and the Caribbean, with a combined throughput capacity of approximately 3.3 million barrels per day. The Retail segment comprises company-operated convenience stores, Canadian dealers/jobbers, truckstop facilities, cardlock facilities, and home heating oil operations. It operates approximately 4,700 retail and branded wholesale outlets in the United States, Canada, and the Caribbean under various brand names, including Valero, Diamond Shamrock, Shamrock, Ultramar, and Beacon. The company was founded in 1955. It was formerly known as Valero Refining and Marketing Company and changed its name to Valero Energy Corporation in 1997. Valero Energy is headquartered in San Antonio, Texas.


CROSSTEX ENERGY INC (XTXI)

Crosstex Energy, Inc., through its subsidiaries, engages in gathering, transmitting, treating, processing, and marketing natural gas. It connects the wells of natural gas producers to its gathering systems in order to purchase the gas production, treats natural gas to remove impurities, processes natural gas for the removal of natural gas liquids, and transports natural gas to various markets. In addition, the company purchases natural gas from producers not connected to its gathering systems for resale and sells natural gas on behalf of producers. As of December 31, 2004, Crosstex Energy operated approximately 4,500 miles of natural gas gathering and intrastate transmission pipelines, 5 natural gas processing plants connected to its gathering systems, and 90 natural gas treating plants. The company is headquartered in Dallas, Texas.


HOLLY CORPORATION (HOC)

Holly Corporation operates an independent petroleum refiner that engages in the refining, transportation, terminalling, and marketing of petroleum products. The company's activities are segregated into Refining and Pipeline Transportation segments. Refining segment involves the refining of crude oil and wholesale marketing of refined products, such as gasoline, diesel fuel, and jet fuel. The petroleum products produced by the segment are marketed in the southwestern United States, Utah, Wyoming, Montana, and northern Mexico. It also includes the company's 49% interest in NK Asphalt Partners, which manufactures and markets asphalt and asphalt products in Arizona and New Mexico. Pipeline Transportation segment includes approximately 500 miles of the company's pipeline assets in Texas and New Mexico. It principally engages in the pipeline transportation, rental, and terminalling operations. The segment also includes the company's 70% interest in Rio Grande Pipeline Company, which provides petroleum products transportation. In addition, the company engages in the exploration and production of oil and gas. It owns and operates three refineries, including Navajo Refinery in New Mexico; a refinery in Woods Cross, Utah; and a refinery in Great Falls, Montana, as well as owns and operates nine refined product storage terminals in Artesia, Moriarty, Bloomfield, and Lovington, New Mexico; El Paso, Texas; Woods Cross, Utah; Great Falls, Montana; Spokane, Washington; and Mountain Home, Idaho. The company owns interests in four refined product storage terminals in Albuquerque, New Mexico; Tucson, Arizona; and Burley and Boise, Idaho. It owns or leases approximately 2,000 miles of pipeline located principally in west Texas and New Mexico. The company was incorporated in Delaware in 1947 and has principal executive offices in Dallas, Texas.


SULPHCO INC (SUF)

SulphCo, Inc., a developmental stage company, engages in the development and commercialization of technology for the upgrading of crude oil. The company's Sonocracking process is based upon the use of ultrasonics that include the application of energy and frequency sound waves, which alters the molecular structure of crude oil, decreases the relative density and the viscosity of crude oil, and increases the amount of lighter oils that can be recovered during the refinery processes. This technology also reduces the weight percentage of sulfur and parts per million of nitrogen in the chemical composition of crude oil. The company serves crude oil producers and refiners. SulphCo has a collaboration agreement with ChevronTexaco Energy Technology Company; and a joint venture with Trans Gulf Petroleum Co. to implement SulphCo's Sonocracking desulfurization technology. The company was founded in 1999 and is based in Sparks, Nevada.


SUNOCO INC (SUN)

Sunoco, Inc., through its subsidiaries, engages in the manufacture and marketing of petroleum and petrochemical products in the United States. The company operates in five segments: Refining and Supply, Retail Marketing, Chemicals, Logistics, and Coke. The Refining and Supply segment manufactures petroleum products, including gasoline; middle distillates, primarily jet fuel, heating oil, and diesel fuel; and residual fuel oil. It also produces commodity petrochemicals, including olefins and their derivatives, such as ethylene, ethylene oxide polymers, and refinery-grade propylene; and aromatics and their derivatives, which include benzene, cyclohexane, toluene, and xylene. The segment also manufactures petroleum and lubricant products. It sells its products primarily to wholesale and industrial customers. The Retail Marketing segment engages in the retail sale of gasoline and middle distillates, as well as the operation of convenience stores in 24 states, primarily on the East Coast and in the midwest region of the United States. The Chemicals segment manufactures, distributes, and markets commodity and intermediate petrochemicals. These chemicals consist of aromatic derivatives, such as cumene, phenol, acetone, and bisphenol-A; and polypropylene. The Logistics segment operates refined product crude oil pipelines and terminals, and conducts crude oil acquisition and marketing activities. The Coke segment manufactures metallurgical coke for use in the steel industry. Sunoco was founded in 1886 and is headquartered in Philadelphia, Pennsylvania.


ALON USA ENERGY INC (ALJ)

Alon USA Energy, Inc., together with its subsidiaries, engages in refining and marketing petroleum products primarily in the south central, southwestern, and western regions of the United States. The company operates in three segments: Refining and Marketing, Asphalt, and Retail. The Refining and Marketing segment includes sour and heavy crude oil refineries located in Big Spring, Texas; and Paramount and Long Beach, California. It refines crude oil into petroleum products, including gasoline, diesel, jet fuel, petrochemicals, feedstocks, asphalts, and other petroleum-based products. This segment primarily markets its gasoline and diesel fuels under the FINA brand name through a network of approximately 1,200 locations. The Asphalt segment includes refinery/terminal locations in Big Spring, Texas; Paramount, Long Beach, Elk Grove, Bakersfield, and Mojave, California; Willbridge, Oregon; Richmond Beach, Washington; Fernley, Nevada; and Phoenix, Flagstaff, and Fredonia, Arizona, as well as holds a 50% interest in Wright, which markets patented tire rubber modified asphalt products. This segment produces both paving and roofing grades of asphalt; and performance-graded asphalts, emulsions, and cutbacks. As of December 31, 2006, the Retail segment operated 206 owned and leased convenience stores in west Texas and New Mexico. Its stores offer various grades of gasoline, diesel fuel, food products, tobacco products, non-alcoholic and alcoholic beverages, and general merchandise to the general public under the 7-Eleven and FINA brand names. The company was founded in 2000 and is based in Dallas, Texas. Alon USA Energy, Inc. is a subsidiary of Alon Israel Oil Company, Ltd.


BP PRUDHOE BAY ROYALTY TRUST (BPT)

BP Prudhoe Bay Royalty Trust operates as a grantor trust in the United States. The trust holds overriding royalty interest in the Prudhoe Bay Unit located on the North Slope in Alaska. The royalty interest constitutes a nonoperational interest in minerals, which entitles the trust to a royalty on 16.4246% of the first 90,000 barrels of the average actual daily net production of oil and condensate per quarter. BP Prudhoe Bay Royalty Trust was formed in 1989 and is based in New York City.


PETROLEUM DEVELOPMENT CORPORATION (PETD)

Petroleum Development Corporation engages in the development, production, and marketing of natural gas in the United States. The company's operations include drilling and development activities, the acquisition of producing natural gas and oil wells, and the expansion of its natural gas marketing activities. The company operates approximately 2,700 wells located in the Appalachian basin, Michigan, and the Rocky Mountain Region, with gross proved reserves of approximately 523 billion cubic feet equivalent of natural gas. The company also purchases, aggregates, and resells natural gas developed by other producers to industrial end-users, utilities, other gas marketers, and other wholesale gas purchasers. Petroleum Development was incorporated in 1955 and is headquartered in Bridgeport, West Virginia.


EAGLE ROCK ENERGY PARTNERS L.P (EROC)

Eagle Rock Energy Partners, L.P. engages in gathering, compressing, treating, processing, transporting, and selling natural gas, as well as fractionating and transporting natural gas liquids. It has its natural gas gathering and processing assets located in Texas Panhandle, southeast Texas, and Louisiana. The company's Texas Panhandle operations consist of the east Panhandle system and the west Panhandle system. East Panhandle system includes 773 miles of natural gas gathering pipelines; 3 natural gas processing plants; and 2 natural gas treating facilities. West Panhandle system consists of approximately 2,736 miles of natural gas gathering pipelines, 4 natural gas processing plants, 3 natural gas treating facilities, 1 propane fractionation facility, and 1 condensate collection facility. Its southeast Texas and Louisiana operations comprise the operation of approximately 1,049 miles of natural gas gathering pipelines, 2 cryogenic processing plants, and a 19 mile natural gas liquid pipeline. The company was founded in 2002 and is based in Houston, Texas.


ENTERPRISE GP HOLDINGS L.P (EPE)

Enterprise GP Holdings L.P., through its subsidiaries, develops pipeline and other midstream energy infrastructure in the continental United States and Gulf of Mexico. Its midstream energy asset network links producers of natural gas, NGLs, and crude oil from supply basins in the United States, Canada, and the Gulf of Mexico. The company operates through four segments: NGL Pipelines and Services; Onshore Natural Gas Pipelines and Services; Offshore Pipelines and Services; and Petrochemical Services. The NGL Pipelines and Services segment engages in natural gas processing and related NGL marketing activities; operates NGL pipelines, storage facilities, and import/export terminals; and owns interests in seven NGL fractionation facilities located in Texas and Louisiana. The Onshore Natural Gas Pipelines and Services segment provides gathering and transmission of natural gas through onshore natural gas pipeline systems in Alabama, Colorado, Louisiana, Mississippi, New Mexico, Texas, and Wyoming. This segment also owns two salt dome natural gas storage facilities located in Mississippi and lease natural gas storage facilities located in Texas and Louisiana. The offshore Pipelines and Services segment provides gathering and transmission of natural gas from production developments through offshore natural gas pipeline systems. This segment also owns interests in seven offshore oil pipeline systems and six multipurpose offshore hub platforms in the Gulf of Mexico. The Petrochemical Services segment operates four propylene fractionation facilities located in Texas and Louisiana. Enterprise GP Holdings was founded in 2005 and is headquartered in Houston, Texas.


YPF SOCIEDAD ANONIMA (YPF)

YPF Sociedad Anonima (YPF) engages in the exploration, development, and production of oil and gas in Argentina. It also involves in the refining, marketing, transportation, and distribution of crude oil and various petroleum products, its derivatives, petrochemicals, and liquid petroleum gas (LPG) and natural gas. The company markets refined petroleum products, such as gasoline, diesel, jet fuel, kerosene, and heavy fuel oil; as well as other crude oil products, such as motor oils, industrial lubricants, LPG, asphalts, and naphthas. It also engages in electricity-generation activities and participates in four electric generation power stations, which generate approximately 9,409 Gigawatt per hour. As of December 31, 2004, YPF had proved developed reserves of 908 million barrels of crude oil, condensate, and natural gas liquids; and 5,041 billion cubic feet of natural gas. The company was formed in 1977 and is based in Buenos Aires, Argentina. YPF Sociedad Anonima is a subsidiary of Repsol YPF, S.A.