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.

Jointly owned by affiliates of Vectren Corporation and Citizens Energy Group, ProLiance Holdings, LLC is an energy related holding company with subsidiaries focused on serving and investing in the natural gas industry.Our largest subsidiary is ProLiance Energy, an Indianapolis based natural gas marketing and supply company that has been providing service to natural gas customers since 1996 and has an extensive network of industry partners from wellhead to consumer. ProLiance Energy purchases natural gas from various, geographically diverse supply basins and transports and stores natural gas utilizing many strategically located resources. Having the industry expertise to manage these upstream transactions, gives us the ability to serve over 1,600 industrial and commercial customer locations at more than 2,700 meter sites and to provide commodity and services to numerous municipalities and utilities. Signature Energy Management, a wholly-owned subsidiary of ProLiance Energy, provides natural gas price management, energy monitoring and sustainability products and services to energy customers nationwide. ProLiance Holdings also owns ProLiance Transportation and Storage, an asset investment and operations company that strengthens the corporate balance sheet and strategically complements its mission. Existing natural gas pipelines and storage facilities include White River Storage and the Ohio Valley Hub, and interests in Heartland Gas Pipeline, Lee 8 Storage, and Liberty Gas Storage.

Dixie Gas & Oil, a distributor of propane, heating oil, industrial lubricants, and other petroleum products to customers in Virginia and West Virginia. Dixie Gas & Oil Corporation also operates gas stations and convenience stores and provides fleeting fueling services. In addition to propane and petroleum, Dixie Gas & Oil supplies CITGO- and Castrol-branded commercial and food grade lubricants; Dixie Gas & Oil Corporation also supplies some retailers with BP and Pure petroleum products. Dixie Gas & Oil Corporation was founded as Dixie Bottled Gas Company in 1946. Dixie Gas & Oil's five gas stations/convenience stores offer BP fuels, Subway sandwiches and salads, as well as convenience food items.

Dril-Quip, Inc. designs, manufactures, fabricates, inspects, assembles, tests, and markets engineered offshore drilling and production equipment for use in deepwater, harsh environment, and severe service applications worldwide. Dril-Quip, Inc. principal products include subsea and surface wellheads, subsea and surface production trees, subsea control systems and manifolds, mudline hanger systems, specialty connectors and associated pipe, drilling and production riser systems, liner hangers, and wellhead connectors and diverters. Dril-Quip, Inc. products are used to explore for oil and gas on offshore drilling rigs, such as floating rigs and jack-ups. Dril-Quip, Inc. products are also used for drilling and production of oil and gas wells on offshore platforms; TLPs, which are floating production platforms connected to the ocean floor via vertical mooring tethers; Spars, a floating cylindrical structure; and floating production, storage, and offloading monohull moored vessels. In addition, Dril-Quip, Inc. provides services, including technical advisory services, rework and reconditioning services, and rental of running tools for use in the installation and retrieval of its products. Dril-Quip, Inc. serves integrated, independent, and foreign national oil and gas companies, as well as offshore drilling contractors, and engineering and construction companies. Dril-Quip, Inc. was founded in 1981 and is based in Houston, Texas.

TBX Resources, Inc. is an independent energy company engaged in the acquisition, production and development of proven domestic reserves. TBX Resources was formed in November of 1994 by its founder, Tim Burroughs. In 2006 TBX Resources, Inc. had proved reserves of 14,953 barrels of oil and 61.6 million cu. ft. of natural gas. Approximately 70% of TBX Resources, Inc. proved reserves are in the form of oil. TBX Resources owns or has interests in 23 oil wells in East Texas, two in Wise County, Texas, and four in the Anadarko Basin. Founder Tim Burroughs, the TB in TBX Resources, owns 9.4% of TBX Resources outright, and a further 13.1% through his family trust. TBX Resources also owns interest in 2 producing oil wells in Wise County; 1 producing gas well in Parker County; and 5 producing gas wells in Denton County, Texas, as well as a minor interest in 3 wells in Ellis County, Oklahoma. TBX Resources, Inc. was founded in 1995 and is based in Dallas, Texas.

Fugro helps the oil and gas, mining, and construction industries stay grounded. The geological engineering company operates three divisions. Fugro N.V. Survey unit offers geophysical surveys, inspection services, oceanographic mapping, aerial photography, and global positioning services. Fugro's Geotechnical division provides design and construction services, including pavement engineering, pipeline engineering, drilling, materials testing, structural monitoring, and foundation analysis and modeling, and primarily serves the oil and gas industry. Fugro N.V. Geosciences operations provide seismic and gravity surveys, reservoir services, and airborne mineral and petroleum exploration.

Schlumberger Limited and its subsidiaries supply technology, integrated project management, and information solutions to the oil and gas industry worldwide. Schlumberger Limited operates in two segments, Oilfield Services and WesternGeco. The Oilfield Services segment provides a range of exploration and production services required during the life of an oil and gas reservoir. Schlumberger Limited offers Wireline technologies comprising open-hole and cased-hole services; directional-drilling, measurement-while-drilling, and logging-while-drilling services; exploration and production pressure and flow-rate measurement services at the surface and downhole; services used during oil and gas well drilling and completion; and services used to maintain optimal production throughout the life of a well. Schlumberger Limited also provides well completion services and equipment; artificial lift; data and consulting services; and information solutions, including consulting, software, information management, and IT infrastructure services that support oil and gas industry operational processes. The WesternGeco segment provides reservoir imaging, monitoring, and development services, as well as operates data processing centers, and multiclient seismic library. Schlumberger Limited services range from 3D and time-lapse (4D) seismic surveys to multi-component surveys for delineating prospects and reservoir management. Schlumberger Limited has a joint venture agreement with National Oilwell Varco, Incorporated to provide high speed drill string telemetry systems. Schlumberger Limited was founded in 1927 and is based in Houston, Texas.

In 1929, when the United States was just beginning to enter the era of the Great Depression, Joe H. Glenn, Jr. and Bert L. Bennett, Sr., were beginning an era of their own. These two men shared very little in common, other than the fact that they both had a dream of owning an oil distributorship. This dream seemed unrealistic in the economic conditions that were present in 1929, but Joe Glenn and Bert Bennett, Sr. would not stop dreaming and looked beyond adversity to opportunity to make this dream come true. Quality Oil Company was organized in December 1929. Initially, the Company had been created to launch a distributorship for the then unheard of, Shell Oil Company. This distributorship was originally owned by W. H. Leonard and an unknown partner. Joe Glenn and his uncle, Bert Bennett, Sr. bought the business in 1930. Although the partnership changed hands, the original name of the distributorship remained the same. W. H. Leonard went on to form his own oil company, Leonard Oil Company, which was purchased by Quality Oil Company sixty years later.

Wintershall is a wholly owned subsidiary of BASF, which is based in Ludwigshafen, and specializes in energy. Wintershall is active in various regions of the world in the exploration and production of crude oil and natural gas. In Europe the BASF subsidiary trades and sells natural gas. Wintershall Holding AG also markets storage capacities for oil and gas, transportation capacities for gas as well as optic fiber capacities. Wintershall has been active in the exploration and production of oil and gas for more than 75 years, and with its headquarters in Kassel, Wintershall Holding AG is now Germany’s largest producer of crude oil and natural gas. In its exploration and production activities, Wintershall deliberately focuses on selected core regions where the company possesses a wealth of regional and technological expertise. These regions include Europe, North Africa, South America as well as Russia and the Caspian Sea region. In addition, these operations are complemented by the Wintershall Holding AG growing exploration activities in the Arabian Gulf.

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.

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