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RELIANT RESOURCES INC (RRI)

Reliant Energy, Inc. provides electricity and energy services to retail and wholesale customers in the United States. The company offers energy products and services to approximately 1.9 million retail electricity customers in Texas, including residential and business customers, and commercial, industrial, and governmental/institutional customers. It also provides capacity and ancillary services in the wholesale energy markets. The company offers asset management services, including transportation and storage, and supply management; emisions and renewable credit trading; and long-term energy-management solutions, including contract administration and accounting services, and financing. Reliant also serves commercial and industrial clients in the Pennsylvania, New Jersey, and Maryland interconnection. In addition, the company trades and markets power, natural gas, and other energy-related commodities, as well as provide related risk management services. As of December 31, 2004, it owned, had an interest in, or leased 50 operating electric power generation facilities with an aggregate net generating capacity of 18,737 MW in six regions of the United States. The company was incorporated in 2000 and was formerly known as Reliant Resources, Inc. It changed its name to Reliant Energy, Inc. in April 2004. Reliant Energy is based in Houston, Texas.


MAINE & MARITIMES CORPORATION (MAM)

Maine & Maritimes Corporation operates as the holding company for Maine Public Service Company and The Maricor Group. Its Maine Public Service Company (MPS) is a regulated electric transmission and distribution utility serving Aroostook County and a portion of Penobscot County in northern Maine. MPS provides energy transportation through its transmission and distribution wires infrastructure. As of December 31, 2004, MPS had approximately 380 circuit miles of transmission lines and MPS owned approximately 1,767 miles of distribution lines. The Maricor Group is an energy asset development and mechanical and electrical engineering consulting firm providing energy efficiency, facilities lifecycle asset management, facility condition assessment, fee-for-service design engineering and emissions reduction services primarily within the New England region of the United States and the eastern Canadian provinces, particularly Atlantic Canada. Its energy asset development activities include efforts to plan, develop, own, and operate customer-hosted energy assets, such as central utility and co-generation plants. In addition, The Maricor Group, through its other subsidiaries, engages in mechanical and electrical engineering, real estate development and investment, and software technology development. The company was founded in 1917 and is headquartered in Presque Isle, Maine.


NRG ENERGY INC (NRG)

NRG Energy, Inc. primarily engages in the ownership and operation of power generation facilities and the sale of energy, capacity, and related products in the United States and internationally. The company generates power through natural gas, coal, and oil fired facilities. It also trades energy, capacity, and related products. In addition, NRG Energy owns district heating and cooling systems. As of December 31, 2004, the company owned interests in 52 power projects in 5 countries having an aggregate net generation capacity of approximately 15,400 mega watts. NRG Energy was founded in 1989 and is headquartered in Princeton, New Jersey.


CENTRAL VERMONT PUB SVC (CV)

Central Vermont Public Service Corporation engages in the transmission, distribution, and sale of electricity to residential, commercial, and industrial customers in Vermont. It also invests in wind energy projects in the United States and the United Kingdom; and engages in the sale or rental of electric water heaters to customers in Vermont and New Hampshire. As of July 27, 2005, the company served approximately 150,000 customers. Central Vermont Public Service Corporation was incorporated in 1929 and is based in Rutland, Vermont.


BEACON POWER CORPORATION (BCON)

Beacon Power Corporation, a development stage company, engages in the design, development, configuration, and sale of products and services to support electricity grid operation. The company develops alternative sustainable energy storage and power conversion solutions that provide electric power for the renewable energy, telecommunications, distributed generation, and uninterrupted power supply markets in the United States. Its development stage products include Smart Energy matrix, Smart Power M5 inverter system, and Smart Energy system. Smart Energy matrix regulates the frequency of electricity on the power grid. It also regulates the frequency of electricity produced by a distributed generation facility and compensate for temporary differences between the demand for electricity and the amount being produced by that facility. Smart Power M5 inverter system converts direct current electricity produced by photovoltaic panels into alternating current electricity for residential and commercial use. Smart Energy system stores electricity for telecommunications, cable systems, computer networks, and Internet markets applications. Beacon Power Corporation was founded in 1997 and is based in Wilmington, Massachusetts.


ITC HOLDINGS CORP (ITC)

ITC Holdings Corp., through its subsidiaries, engages in the transmission of electricity in the United States. The company operates primarily as a conduit, moving power from generators to local distribution systems either entirely through its own system or in conjunction with neighboring transmission systems. It also offers upgrading services to existing electricity transmission systems, as well as constructs new electricity transmission systems or portions of systems. ITC Holdings Corp. offers its products and services to investor-owned utilities, municipalities, co-operatives, power marketers, and alternative energy suppliers primarily in Michigan and Kansas. The company was founded in 2001 and is based in Novi, Michigan.


TRANSALTA CORPORATION (TAC)

TransAlta Corporation engages in the production and sale of electric energy in Canada, the United States, Mexico, and Australia. The company operates in two segments, Generation and Energy Marketing. The Generation segment sells electricity and steam, as well as offers ancillary services. It owns and operates coal, gas, wind, geothermal, and hydro power plants in Canada, the United States, Mexico, and Australia. As of March 11, 2005, this segment had 8,444 megawatts of electrical generating capacity. The Energy Marketing segment engages in the wholesale trade of electricity and other energy-related commodities and derivatives, and physical and financial contracts in Canada and the United States. TransAlta has joint venture with EPCOR Utilities, Inc.; and with Newmont Power Pty Limited. The company was founded in 1911 and is headquartered in Calgary, Canada.


COMPANHIA PARANAENSE DE ENERGIA (COPEL) (ELP)

Companhia Paranaense de EnergiaCOPEL engages in the generation, transmission, and distribution of electricity in the Brazilian State of Parana. As of December 31, 2004, it generated electricity at 17 hydroelectric plants and 1 thermoelectric plant, with a total installed capacity of 4,550 MW. As of the above date, the company owned and operated 6,996.3 kilometers of transmission lines and 165,576 kilometers of distribution lines in Brazil. In addition, COPEL provides telecommunications and communications services, as well as holds interests in other companies operating in, such areas as power generation and power marketing, piped gas, sanitation, fixed and mobile telephone services, Internet service providers, power and infrastructure projects, research and development, power and project management, and agribusiness. It also offers consulting services to various countries, including Argentina, Chile, China, Colombia, Malaysia, and Paraguay. The company was founded in 1954 and is headquartered in Curitiba, Brazil.


DYNEGY INC (DYN)

Dynegy, Inc., a holding company, engages in the power generation and natural gas liquids businesses principally in the United States. The company produces and sells electric power and related products and services, including capacity, into real-time and day-ahead markets, as well as on a forward basis. It provides wholesale power to utilities, cooperatives, municipalities, and commercial and industrial customers. Dynegy gathers and processes natural gas, and fractionates, stores, transports, and markets natural gas liquids. As of December 31, 2004, it owned interests in 17 gas processing plants, including 11 plants it operated. The company also operated approximately 9,385 miles of natural gas gathering pipeline systems, as of the above date. Its distribution and marketing services include refinery services and wholesale propane marketing, as well as purchasing mixed natural gas liquids and natural gas liquids products from natural gas liquids producers and other sources and selling the natural gas liquids products to petrochemical manufacturers, refineries, and other marketing and retail companies. Dynegy was founded in 1985 and is based in Houston, Texas.


PPL CORPORATION (PPL)

PPL Corporation, an energy and utility holding company, primarily engages in the generation, sale, and delivery of electricity. The company generates electricity and markets wholesale or retail energy primarily in the northeastern and western United States; delivers electricity to approximately five million customers in Pennsylvania, the United Kingdom, and Latin America; and provides energy services for businesses in the mid-Atlantic and northeastern United States. PPL Corporation was founded in 1920 and is headquartered in Allentown, Pennsylvania.


ORMAT TECHNOLOGIES INC (ORA)

Ormat Technologies, Inc. engages in the design, development, building, ownership, and operation of geothermal power plants and recovered energy-based power plants. Its products and services include power units for geothermal power plants and recovered energy-based power generation; remote power units and other generators; engineering, procurement, and construction of power plants; and operation and maintenance of power plants. As of March 31, 2005, the company had 21% ownership interest in Orzunil I de Electricidad, Limitada in the Province of Quetzaltenango, Guatemala; and 50% interest in the Mammoth Project, which comprised three geothermal power plants. The company was founded in 1965 and is headquartered in Sparks, Nevada. Ormat Technologies, Inc. operates as a subsidiary of Ormat Industries.


CONSTELLATION ENERGY GROUP INC (CEG)

Constellation Energy Group, Inc., a holding company, supplies electricity to commercial and industrial customers in North America. The company operates through three segments: Merchant Energy, Regulated Electric, and Regulated Gas. The Merchant Energy segment engages in the ownership, operation, and maintenance of fossil, nuclear, and hydroelectric generating facilities. It also provides risk management services for various customers, including hedging of output from generating facilities and fuel costs; coal sourcing services for the North American and international power generators; and operations and maintenance consulting services. In addition, the Merchant Segment provides customized energy related products and services to government, commercial, and industrial customers, which include utility infrastructure outsourcing, mechanical/electrical upgrades, utility data mining, and performance contracting. The Regulated Electric segment purchases, transmits, distributes, and sells electricity in Maryland. The Regulated Gas business purchases, transports, and sells natural gas in Maryland. Constellation Energy also designs, constructs, and operates heating, cooling, and cogeneration facilities for commercial, industrial, and governmental customers throughout North America. In addition, it sells home improvements, and sells and services heating, air conditioning, plumbing, electrical, and indoor air quality systems. Constellation Energy Group was founded in 1906 and is headquartered in Baltimore, Maryland.


ENTERGY CORPORATION (ETR)

Entergy Corporation, an integrated energy company, engages primarily in electric power production and retail electric distribution operations. The company operates in three segments: U.S. Utility, Non-Utility Nuclear, and Energy Commodity Services. The U.S. Utility segment generates, transmits, distributes, and sells electric power. It also operates a small natural gas distribution business. The Non-Utility Nuclear segment owns and operates 5 nuclear power plants in the northeastern United States; and sells the electric power produced by those plants to wholesale customers. It also provides services to other nuclear power plant owners. The Energy Commodity Services segment sells the electric power produced by power plants to wholesale customers. The company owns and operates power plants with approximately 30,000 megawatt of electric generating capacity, and nuclear power generator in the United States. Entergy delivers electricity primarily in Arkansas, Louisiana, Mississippi, and Texas. The company is based in New Orleans, Louisiana.


ALLEGHENY ENERGY INC (AYE)

Allegheny Energy, Inc., through its directly and indirectly owned subsidiaries, engages in the ownership and operation of electric generation facilities, as well as in the delivery of electric and natural gas services. The company operates through two segments, Delivery and Services, and Generation and Marketing. The Delivery and Services segment operates electric and natural gas public utility systems. This segment also engages telecommunications and unregulated energy-related projects. The Generation and Marketing segment owns, operates, and controls electric generation facilities, as well as purchases and sells energy and energy-related commodities. As of December 31, 2004, this segment had 10,851 megawatts of generation capacity. Allegheny Energy offers its services to customers in Pennsylvania, West Virginia, Maryland, Virginia, and Ohio. The company was incorporated in 1925 and is headquartered in Greensburg, Pennsylvania.


EDISON INTERNATIONAL (EIX)

Edison International, through its subsidiary, Southern California Edison Company (SCE), supplies electric energy in central, coastal, and southern California. SCE owns and operates pressurized water nuclear units located on the California coastline between Los Angeles and San Diego; 33 hydroelectric plants located in California's Sierra Nevada, San Bernardino, and San Gabriel mountain ranges; a diesel-fueled generating plant and a hydroelectric plant located on Santa Catalina Island off the southern California coast; and coal-fueled generating units located in Clark County, Nevada. As of June 17, 2005, it served a population of approximately 13 million people via 4.6 million customer accounts. Edison International, through its indirect subsidiary Edison Mission Energy (EME), also engages in owning or leasing, operating, and selling energy from electric power generation facilities. EME conducts price risk management and energy trading activities in power markets. In addition, the company, through its other subsidiary, Edison Capital (EC), invests in energy and infrastructure projects, including power generation, electric transmission and distribution, transportation, and telecommunications worldwide. EC also has investments in housing projects located throughout the United States. Edison International was founded in 1886 and is based in Rosemead, California.


FPL GROUP INC (FPL)

FPL Group, Inc., through its principal subsidiary, Florida Power & Light Company, engages in the generation, transmission, distribution, and sale of electric energy principally in the state of Florida. The company produces electricity utilizing natural gas, wind, and nuclear resources. It also owns, develops, constructs, manages, and operates domestic electric-generating facilities in wholesale energy markets. FPL Group also provides fiber-optic and cable services to telecommunications companies and other customers throughout Florida. The company primarily serves residential, commercial, and industrial sectors. As of February 28, 2005, it served approximately 4.2 million customer accounts in Florida. FPL Group was incorporated in 1984 and is based in Juno Beach, Florida.


BLACK HILLS CORPORATION (BKH)

Black Hills Corporation operates as an energy company. The company operates through two groups, Whole Sale Energy and Retail Services. The Whole Sale Energy group's activities include production and sale of electric capacity and energy in the Rocky Mountain and western regions of the United States; production of natural gas and crude oil in the Rocky Mountain region of the United States; mining and production of coal; and marketing and transportion of fuel products in the western and mid-continent regions of the United States, and in western Canada. The Retail Services group consists of electric, communications, and combination electric and gas utilities. Its electric utility generates, transmits, and distributes electricity to approximately 62,000 customers in South Dakota, Wyoming, and Montana; and the sells electric energy and capacity on a wholesale or off-system basis. The group's communications utility provides broadband telecommunications services, including local and long distance telephone service, expanded cable television service, cable modem Internet access, and high speed data and video services to residential and business customers in South Dakota. Its combination electric and gas utility provides electricity to approximately 38,000 customers; and natural gas to 31,000 customers in Cheyenne, Wyoming, and vicinity. As of December 31, 2004, the company had 173,417 million cubic feet of total proved oil and natural gas reserves; and 294 millions of tons of coal reserves. It also operated approximately 516 oil and gas wells. Black Hills was incorporated in 1941 and is based in Rapid City, South Dakota.


OTTER TAIL CORPORATION (OTTR)

Otter Tail Corporation operates as a diversified company with interests in the electric, health services, manufacturing, plastics, and other businesses. The company operates in five segments: Electric, Plastics, Manufacturing, Health Services, and Other Business Operations. The Electric segment produces, transmits, distributes, and sells electric energy. It provides electricity to approximately 128,000 customers, including agricultural, residential, commercial, and industrial customers in Minnesota, North Dakota, and South Dakota. The Plastics segment produces polyvinyl chloride and polyethylene pipes for municipal water, rural water, wastewater, and other uses in the United States and Canada. It sells its products primarily to wholesalers and distributors throughout through independent sales representatives, company salespersons, and customer service representatives. The Manufacturing segment produces waterfront equipment, wind towers, frame-straightening equipment, and accessories for the auto body shop industry; material and handling trays and horticultural containers; fabrication of steel products; contract machining; and metal parts stamping and fabrication. The Health Services segment sells diagnostic medical equipment, patient monitoring equipment, and related supplies and accessories. It also provides service maintenance, diagnostic imaging, positron emission tomography and nuclear medicine imaging, and portable X-ray imaging, as well as rental of diagnostic medical imaging equipment. The Other Business Operations segment consists of businesses involved in food ingredient processing; residential, commercial, and industrial electric contracting industries; fiber optic and electric distribution systems; wastewater, water, and HVAC systems construction; transportation; and energy services and natural gas marketing. Otter Tail was established in 1907 and is headquartered in Fergus Falls, Minnesota.


AMERICAN ELECTRIC POWER COMPANY INC (AEP)

American Electric Power Company, Inc. (AEC), a public utility holding company, which principally engages in the generation, transmission, and distribution of electric power in the United States. The company offers its electric services to the natural gas and oil production, oil refining, steel processing, aircraft maintenance, paper manufacturing and timber products, glass, chemicals, cement, plastics, aerospace manufacturing, telecommunications, rubber goods, concrete products, food processing, transportation equipment, electrical and electronic machinery, fabricated metal products, and various other industries. It offers its services primarily in the states of Arkansas, Indiana, Kentucky, Louisiana, Michigan, Ohio, Oklahoma, Tennessee, Texas, Virginia, and West Virginia. AEC also operates as an energy marketer in North America and the United Kingdom. The company was incorporated in 1906. It was formerly known as American Gas and Electric Company and changed its name to American Electric Power Company, Inc. in 1958. American Electric Power Company is based in Columbus, Ohio.


FIRSTENERGY CORPORATION (FE)

FirstEnergy Corp., through its subsidiaries, provides various energy services in the United States. It engages in the generation, transmission, and distribution of electricity; marketing of natural gas; and energy management and other energy-related services in the United States. The company also provides a range of services, including heating, ventilating, air conditioning, refrigeration, process piping, plumbing, electrical, building controls and systems, and facility management. FirstEnergy builds, operates, and controls telecommunications systems, as well as provides long-distance service, local phone service, and advanced data solutions. As of April 4, 2005, the company served 4.4 million customers within a 36,100 square-mile area of Ohio, Pennsylvania, and New Jersey. FirstEnergy was organized in 1996 and is based in Akron, Ohio.


POTOMAC ELECTRIC POWER COMPANY (POM)

Pepco Holdings, Inc., through its subsidiaries, operates as a diversified energy company. It engages in two principal businesses, electricity and natural gas delivery (Power Delivery); and competitive energy generation, marketing, and supply (Competitive Energy). The Power Delivery business consists of the transmission and distribution of electricity, and the distribution of natural gas in all or parts of Delaware, Maryland, New Jersey, Ohio, Pennsylvania, Virginia, West Virginia, and the District of Columbia. As of December 31, 2004, the company delivered electricity to approximately 1.8 million customers in the mid-Atlantic region, and distributed natural gas to approximately 118,000 customers in Delaware. The Competitive Energy business provides competitive generation, marketing, and supply of electricity and gas, and related energy management services, primarily in the mid-Atlantic region. It offers wholesale electric power, capacity, and ancillary services in the wholesale markets, and supplies electricity to other wholesale market participants under long-term bilateral contracts. The company also sells natural gas and fuel oil to end-users and to wholesale market participants, as well as retail electricity and natural gas to residential, commercial, industrial, and governmental customers. In addition, Competitive Energy provides integrated energy management services, including energy-efficiency contracting, development and construction of green power facilities, central plant and other equipment operation and maintenance, fuel management, and home service agreements for residential customers. Further, it offers high voltage construction and maintenance services to utilities and other customers throughout the United States; and low voltage electric and telecommunication construction, and maintenance services in the Washington, D.C. area. Pepco Holdings was founded in 1896 and is headquartered in Washington, D.C.


DTE ENERGY COMPANY (DTE)

DTE Energy Company, through its subsidiaries, provides electricity and natural gas sales and distribution services in southeastern Michigan. It operates through three segments: Energy Resources, Energy Distribution, and Energy Gas. The Energy Resources Segment (ERS) generates electricity from fossil plants, hydroelectric pumped storage plant, and nuclear plant; purchases electricity from various electricity generators, suppliers, and wholesalers; and sells to residential, commercial, industrial, and wholesale customers in Canada. Its energy services unit includes coal-based fuels operations that produce synthetic fuel from synfuel plants and coke from coke battery plants; owns and/or operates onsite facilities, including pulverized coal injection, power generation, steam production, chilled water, wastewater treatment, and compressed air; and operates peaking and gas-fired electric generating plants. In addition, ERS involves in wholesale electric and gas marketing, and trading operations; provides fuel, transportation, and equipment management services; and develops, owns, and operates landfill gas recovery systems. The Energy Distribution Segment distributes electricity generated by ERS' power generation business and alternative energy suppliers; develops, markets, and distributes a portfolio of distributed generation products; and provides application engineering services, as well as monitors and manages system operations. The Energy Gas Segment involves in gas distribution, providing gas sales and transportation delivery services to approximately 1.2 million residential, commercial, and industrial customers in Michigan; and gas production, including natural gas exploration, development, and production, as well as has interests in interstate transmission pipeline, Vector Pipeline, 7 carbon dioxide processing facilities, and a 9.7 billion cubic feet of natural gas storage field. DTE Energy was incorporated in 1995 and is headquartered in Detroit, Michigan.


DOMINION RESOURCES INC (D)

Dominion Resources, Inc. operates as an integrated gas and electric holding company. It operates through four segments: Dominion Delivery (DD), Dominion Energy (DE), Dominion Exploration and Production (DEP), and Dominion Generation (DG). Dominion Delivery segment manages the company's electric and gas distribution systems and customer service operations, as well as retail energy marketing operations. Dominion Energy segment operates gas transmission pipeline and storage system; electric transmission system; LNG import and storage facility; and energy trading, marketing, hedging, and arbitrage activities. Dominion Exploration and Production segment manages the company's gas and oil exploration, development, and production operations. Dominion Generation segment manages the generation operations of Dominion's electric utility and merchant fleet, and its power purchase agreements. Its generation facilities are located in Virginia, West Virginia, North Carolina, Connecticut, Illinois, Indiana, Pennsylvania, and Ohio. As of December 31, 2004, DD's electric distribution network included approximately 54,000 miles of distribution lines; DE had approximately 6,000 miles of electric transmission lines located in the states of North Carolina, Virginia, and West Virginia; DEP owned 5.9 trillion cubic feet of proved equivalent natural gas reserves; and DG had proved gas and oil reserves of 5,003 billion cubic feet and 148,598 barrels. The company serves governmental agencies and wholesale customers, such as rural electric cooperatives, municipalities, power marketers, and other utilities in Virginia and northeastern North Carolina, as well as residential, commercial, and industrial gas sales and transportation customer accounts in Ohio, Pennsylvania, and West Virginia. Dominion Resources was founded in 1909 and is headquartered in Richmond, Virginia.


PORTLAND GENERAL ELECTRIC CO (POR)

Portland General Electric Company engages in the generation, purchase, transmission, distribution, and retail sale of electricity in the state of Oregon. It also sells electricity and natural gas in the wholesale market to utilities and power marketers in the western United States. The company provides its services to residential, commercial, and industrial customers. As of December 31, 2006, it had 1,974 MW of generating capability and served approximately 793,000 retail customers. Portland General Electric was founded in 1930 and is based in Portland, Oregon.


SOUTHERN COMPANY (SO)

The Southern Company, through its subsidiaries, primarily engages in the generation, transmission, distribution, and supply of electricity in the states of Alabama, Georgia, Florida, Mississippi, and Georgia. The company's retail activities are carried out by Southern Power Company, Alabama Power Company, Georgia Power Company, Gulf Power Company, Mississippi Power Company, and Savannah Electric and Power Company. Its other business activities include investments in synthetic fuels and leveraged lease projects, wireless telecommunication services, energy-related services, and natural gas marketing. The company serves approximately 4 million customers, as of April 26, 2005. Southern Company was incorporated in 1945 and is headquartered in Atlanta, Georgia.


EL PASO ELECTRIC COMPANY (EE)

El Paso Electric Company engages in the generation, transmission, and distribution of electricity in the United States. It serves retail customers in west Texas and southern New Mexico; and wholesale customers in Texas and the Republic of Mexico. The company owns or has ownership interests in 6 electrical generating facilities that comprise 15.8% interest in 3 nuclear generating units and common facilities at Palo Verde, Arizona; Newman Power Station in El Paso, Texas; Rio Grande Power Station in Sunland Park, New Mexico; and 7% interest in Units 4 and 5 at Four Corners station that located in northwestern New Mexico. El Paso Electric also has interests in Copper Power Station in El Paso, Texas; and Hueco Mountain Wind Ranch in Hudspeth County. In addition, it owns or has ownership interests in four 345 Kilovolt (kV) transmission lines in New Mexico, and three 500 kV lines in Arizona, as well as owns the transmission and distribution network within its New Mexico and Texas retail service area. As of July 21, 2005, the company served approximately 334,000 residential, commercial, industrial, and wholesale customers. El Paso Electric was incorporated in 1901 and is based in El Paso, Texas.


CLECO POWER LLC (CNL)

Cleco Corporation, through its subsidiaries, operates as an energy services company. Its subsidiary, Cleco Power LLC, provides electric utility services, which include generation, transmission, and distribution of electricity to approximately 265,000 retail and wholesale customers in 103 communities in central and southeastern Louisiana. As of December 31, 2004, Cleco Power owned 3 steam electric generating stations and 1 gas turbine with a combined electric net generating capacity of 1,359 MW; and 70 active transmission substations and 222 active distribution substations. The company's another subsidiary, Cleco Midstream Resources LLC, owns and operates two wholesale electric generation stations and invests in joint ventures that own and operate merchant generation stations in Louisiana and Texas. As of the above date, Cleco Midstream owned two steam electric generating stations, Evangeline and Perryville; and had a 50% ownership interest in an additional station, Acadia. The company also involves in energy management activities. It serves residential, commercial, and industrial customers. The company is headquartered in Pineville, Louisiana.


PUGET SOUND ENERGY (PSD)

Puget Energy, Inc., an energy services holding company, engages in the transmission, distribution, and generation of electric energy, as well as transmission and distribution of natural gas primarily in Washington. The company also provides infrastructure construction services to the electric and gas utility industries in the United States. It offers various services to the electric utility industry, which include overhead and underground power line and cable construction, installation, and maintenance, including high-voltage transmission and distribution lines, copper, and fiber optic cables; duct installation; revitalization and damage prevention for underground power lines and cables using the patented Cablecure treatment; substation construction; and other specialty services for new and existing infrastructures. Its services to the gas utility industry include large-diameter pipeline installation and maintenance; service lines and meters; conventional river crossings and bridge maintenance; and cathodic protection. Puget Energy also offers power station fabrication and installation; vacuum excavation; hydrostatic testing; internal pipeline inspection; product pipelines; and other specialty services for distribution and transmission pipeline services, including small, mid-size, and large-bore directional drilling for various pipeline diameters and soil conditions. As of December 31, 2004, the company had approximately 1,001,200 electric customers and approximately 672,000 gas customers. Puget Energy was founded in 1912 and is headquartered in Bellevue, Washington.


NSTAR (NST)

NSTAR, a holding company, engages in the transmission and distribution of energy principally in Massachusetts. The company primarily transports electricity and natural gas. As of January 19, 2005, it served approximately 1.4 million customers in eastern and central Massachusetts, including 1.1 million electric distribution customers in 81 communities, and 300,000 natural gas distribution customers in 51 communities. The company also conducts nonutility, unregulated operations, such as liquefied natural gas service and telecommunications. NSTAR was founded in 1886 and is based in Boston, Massachusetts.


XCEL ENERGY INC (XEL)

Xcel Energy, Inc., through its subsidiaries, operates as an electrical and natural gas company in the United States. Its activities include generation, purchase, transmission, distribution, and sale of electricity. The company also purchases, transports, and distributes natural gas to retail customers; and transports customer-owned natural gas. Xcel Energy serves customers in portions of Colorado, Kansas, Michigan, Minnesota, New Mexico, North Dakota, Oklahoma, South Dakota, Texas, and Wisconsin. As of December 31, 2004, it provided electricity services to approximately 3.3 million customers; and natural gas services to approximately 1.8 million customers in the United States. Xcel Energy was incorporated in 1909 and is based in Minneapolis, Minnesota.


PROGRESS ENERGY INC (PGN)

Progress Energy, Inc. operates as an integrated energy company primarily in the southeast region of the United States. It operates through Progress Energy Carolinas Electric (PEC Electric), Progress Energy Florida (PEF), Competitive Commercial Operations (CCO), Fuels, and Synthetic Fuels segments. The PEC Electric segment and PEF segment are primarily engaged in the generation, transmission, distribution, and sale of electric energy in portions of North Carolina and South Carolina, and Florida, respectively. These electric operations also distribute and sell electricity to other utilities, primarily on the east coast of the United States. The CCO segment engages in nonregulated electric generation operations and marketing activities primarily in Georgia, North Carolina, and Florida. The Fuels segment primarily engages in natural gas production in Texas and Louisiana; and coal mining, coal terminal services, and fuel transportation and delivery in Kentucky, West Virginia, and Virginia. The Synthetic Fuels segment engages in the production and sale of synthetic fuels, and the operation of synthetic fuel facilities for outside parties in Kentucky, West Virginia, and Virginia. The company had approximately 24,000 megawatts of electric generation capacity and serves approximately 2.9 million retail electric customers, as of December 31, 2004. Progress Energy, formerly known as CP&L Energy, Inc., was founded in 1925 and is headquartered in Raleigh, North Carolina.


EMPIRE DISTRICT ELECTRIC COMPANY (EDE)

The Empire District Electric Company engages in the generation, purchase, transmission, distribution, and sale of electricity in parts of Missouri, Kansas, Oklahoma, and Arkansas. It also provides water service to three towns in Missouri and has investments in certain nonregulated businesses, including fiber optics, Internet access, close-tolerance custom manufacturing, and customer information system software services. As of December 31, 2004, it owned and operated water pumping facilities and distribution systems consisting of approximately 84 miles of water mains. The company was founded in 1909 and is headquartered in Joplin, Missouri.


AES TRUST (AES)

The AES Corporation, through its subsidiaries, engages in the ownership and operation of electric power generation and distribution businesses worldwide. It operates in four segments: Contract Generation, Competitive Supply, Large Utilities, and Growth Distribution. The Contract Generation segment supplies wholesale electricity under long-term contracts. The Competitive Supply segment supplies wholesale electricity pursuant to short-term contracts or to spot electricity markets. Competitive Supply segment owns power plants, which sell electricity to wholesale customers. The Large Utility segment owns utilities that maintain a franchise within a defined service area. Growth Distribution segment operates electricity distribution facilities, which offers generation, transmission, distribution, and related services. As of December 31, 2004, the company generated approximately 44 gigawatts of capacity and sold approximately 88,890 gigawatt hours per year. The AES Corporation has a strategic partnership with XL Techgroup, Inc. to identify market needs across the energy sector, with an emphasis on opportunities in the renewable energy field. The company was formed in 1981 and is based in Arlington, Virginia.


TECO ENERGY INC (TE)

TECO Energy, Inc., through its subsidiaries, engages in the regulated utilities and other unregulated businesses. The company provides retail electric service to approximately 625,000 customers in west central Florida. It purchases and distributes natural gas for residential, commercial, industrial, and electric power generation customers in Florida. The company has interests in mineral rights. It owns or operates surface and underground mines, synthetic fuel production facilities, and coal processing and loading facilities in eastern Kentucky, Tennessee, and southwestern Virginia. The company also has interests in independent power projects in Virginia, Arkansas, Mississippi, and Arizona. In addition, TECO Energy provides waterborne transportation, storage, and transfer services of coal, and other dry-bulk commodities. TECO Energy was founded in 1899 and is headquartered in Tampa, Florida.


AMEN PROPERTIES INC (AMEN)

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 properties. As of June 30, 2005, the company has a commercial real estate portfolio consisting of majority ownership in two commercial office properties located in Midland, Texas comprising an aggregate of approximately 428,560 square feet of gross leasable area. Through Amen Minerals, LP, it owns two oil and gas royalty properties, one in Nowata County, Oklahoma and the other in Hemphill County, Texas. The company was founded in 1993. It was formerly known as DIDAX, Inc. and changed its name to Crosswalk.com, Inc. in 2002. Further, Crosswalk.com changed its name to AMEN Properties, Inc. in 2003. The company is headquartered in Midland, Texas.


GREAT PLAINS ENERGY INC (GXP)

Great Plains Energy Incorporated, through its subsidiaries, engages in the generation, transmission, distribution, and sale of electricity in the United States. Through its subsidiary, Kansas City Power & Light Co. (KCP&L), the company provides electricity to residences, commercial firms, industrials, municipalities, and other electric utilities in Missouri and Kansas. As of December 31, 2004, KCP&L served approximately 490,000 customers in 24 counties of western Missouri and eastern Kansas. The company, through its another subsidiary, Strategic Energy LLC, offers electricity supply services for commercial, institutional, and government customers in California, Connecticut, Maryland, Massachusetts, Michigan, New Jersey, New York, Ohio, Pennsylvania, and Texas. Great Plains Energy is headquartered in Kansas City, Missouri.


IDACORP INC (IDA)

IDACORP, Inc., through its Idaho Power Company (IPC) subsidiary, engages in the generation, purchase, transmission, distribution, and sale of electric energy primarily in southern Idaho and eastern Oregon. The company owns and operates 17 hydroelectric power plants and 1 natural gas-fired plant, as well as shares ownership in 3 coal-fired generating plants. IPC also supplies coal to the Jim Bridger generating plant. As of December 31, 2004, it supplied electric energy to approximately 440,000 general business customers. IDACORP, through its IDACORP Financial Services, Inc. (IFS) subsidiary, holds housing and other real estate investments. IFS's portfolio primarily comprises housing developments in 49 states, Puerto Rico, and the United States Virgin Islands, as well as historic rehabilitation projects, such as the Empire Building in Boise, Idaho. In addition, the company, through its other subsidiaries, develops integrated fuel cell systems; provides integrated telecommunications services, as well as commercial and residential Internet services, including video conferencing, voice-over Internet protocol, offsite training, gigabit Ethernet service, virtual private networks, firewalls, and Web hosting in Boise, Idaho; and Las Vegas and Reno, Nevada. IDACORP is headquartered in Boise, Idaho.


DUKE ENERGY CORPORATION (DUK)

Duke Energy Corporation (DEC) engages in the natural gas and electric businesses in America. The company also supplies, delivers, and processes energy. It operates in six divisions: Franchised Electric, Natural Gas Transmission, Field Services, Duke Energy North America (DENA), International Energy, and Crescent Resources (crescent). The Franchised Electric division generates, transmits, distributes, and sells electricity in central and western North Carolina and western South Carolina. The Natural Gas Transmission division provides transportation and storage of natural gas along the U.S. East Coast, the Southeast, and in Canada. It also provides natural gas sales and distribution service to retail customers in Ontario, and natural gas processing services to customers in Western Canada. The Field Services division gathers, compresses, treats, processes, transports, trades and markets, and stores natural gas; and fractionates, transports, trades and markets, and stores natural gas liquids. The DENA division operates and manages power plants, and markets electric power and natural gas in the U.S. and Canada. The International Energy division operates and manages power generation facilities, and sells and markets electric power and natural gas. The Crescent division develops and manages commercial, residential, and multi family real estate projects primarily in the southeastern and southwestern United States. In addition, the company develops, owns, and operates a fiber optic communications network primarily in the Carolinas. It serves wireless, local and long-distance communications companies, Internet service providers and other businesses and organizations through DukeNet Communications, LLC; and provides insurance and reinsurance of various business risks and losses, such as workers compensation, property, business interruption, and general liability of subsidiaries, through Bison Insurance Company Limited. DEC is headquartered in Charlotte, North Carolina.


UNISOURCE ENERGY CORPORATION (UNS)

UniSource Energy Corporation, through its subsidiaries, operates as an electric utility in Arizona. It conducts its business in four segments: TEP's Electric Utility, UNS Gas, UNS Electric, and Global Solar. The TEP's Electric Utility segment provides regulated electric service to the community of Tucson, Arizona. It also sells electricity to other utilities and power marketing entities in the western United States. TEP serves various industries, including copper mining, cement manufacturing, defense, health care, education, military bases, and other governmental entities. The UNS Gas segment distributes gas to residential customers. It serves approximately 133,000 retail customers in Mohave, Yavapai, Coconino, and Navajo Counties in northern Arizona, as well as Santa Cruz County in southeast Arizona. This segment also provides natural gas transportation services. The UNS Electric segment engages in the transmission and distribution of electric power primarily to residential, small commercial, and light and heavy industrial customers. It serves approximately 85,000 retail customers in Mohave and Santa Cruz counties, Arizona. In addition, UNS Electric owns and operates the Valencia Power Plant that consists of three gas and diesel-fueled combustion turbine units located in Nogales, Arizona. The Global Solar segment develops and manufactures light weight thin-film photovoltaic cells and panels for military, space, and commercial applications. The company also invests in unregulated businesses, including a developer of thin-film batteries; and a provider of electrical contracting services in Arizona to commercial, industrial, and governmental customers in high voltage and inside wiring capacities, and meter reading services. UniSource Energy was founded in 1902 and is headquartered in Tucson, Arizona.


PINNACLE WEST CAPITAL CORPORATION (PNW)

Pinnacle West Capital Corporation, through its subsidiaries, provides energy and energy-related products primarily in Arizona. It engages in the generation, transmission, and distribution of electricity in the western United States. The company provides commodity-related energy services, such as direct access commodity contracts, energy procurement, and energy supply consultation; and energy-related products and services, such as energy master planning, energy use consultation and facility audits, cogeneration analysis, and installation and project management to commercial, industrial, and institutional retail customers in the western United States. In addition, Pinnacle West develops residential, commercial, and industrial real estate projects in Arizona, Idaho, New Mexico, and Utah. Its assets consist primarily of land with improvements, commercial buildings, golf courses, and other real estate investments. Further, the company invests in companies offering energy-related technologies and services. Pinnacle West was founded in 1920 and is headquartered in Phoenix, Arizona.


OGE ENERGY CORPORATION (OGE)

OGE Energy Corp. operates as an energy and energy services provider that offers delivery and management of electricity and natural gas primarily in the south central United States. The company, through its subsidiary, Oklahoma Gas and Electric Company, engages in the generation, transmission, distribution, and sale of electric energy in Oklahoma and western Arkansas. OGE Energy, through Enogex, Inc., engages in the transportation, storage, gathering, processing, and marketing of natural gas. As of December 31, 2004, the company provided electricity to approximately 1.9 million customers and operated approximately 8,200 miles of intrastate gas gathering and transportation pipelines. OGE Energy was incorporated in 1995 and is based in Oklahoma City, Oklahoma.


UIL HOLDINGS CORPORATION (UIL)

UIL Holdings Corporation provides electricity and related services, electrical contracting, and voice-data-video systems integration services in the United States. It operates in two segments Utility and Electrical Contracting. The Utility segment engages in the purchase, transmission, distribution, and sale of electricity for residential, commercial, and industrial purposes. It offers its services to approximately 320,000 customers in urban and suburban areas of New Haven and Bridgeport. The Electrical Contracting segment provides electrical, mechanical, and voice-data-video design, construction, and related services. Its services include designing, building, maintaining, and servicing electrical data communications and utilities systems. Its electrical contracting services include design of the electrical distribution systems within a building; procurement and installation of wiring and connection to power sources and end-use equipment; and contract maintenance. Its mechanical contracting services include the design, procurement, and installation of systems for heating, ventilation, air conditioning, and refrigeration; room ventilation systems; and plumbing, process, and fire protection piping systems. The Electrical Contracting segment offers its services to contractors, property managers and developers, corporations, government agencies and municipalities, utilities, gaming facilities, and homeowners. It also provides computer network systems integration services, which include design, installation, management, and support of various network needs, including point-to-point data and communications installations, and wide area data and communication networks. It offers these services to healthcare and educational facilities, as well as to technology, financial services, and pharmaceutical companies. In addition, UIL Holdings owns and operates two heating and cooling energy centers. The company was founded in 1899 and is headquartered in New Haven, Connecticut.


HAWAIIAN ELECTRIC INDUSTRIES INC (HE)

Hawaiian Electric Industries, Inc. and its subsidiaries engage in electric utility, banking, and other businesses in Hawaii. It engages in the production, purchase, transmission, distribution, and sale of electricity on the islands of Oahu; Maui, Lanai, and Molokai; and Hawaii. The company supplies approximately 93% of the Hawaii electric public utility market that include residential, commercial, and light and power customers. In addition, it provides an array of banking and other financial services to consumers and businesses. As of December 31, 2004, Hawaiian Electric Industries operated a network of 66 branches in Hawaii. The company was incorporated in 1891 and is headquartered in Honolulu, Hawaii.


ENVIRONMENTAL POWER CORPORATION (EPG)

Environmental Power Corporation (EPC), through its subsidiaries, engages in the development, ownership, and operation of noncommodity, renewable, and alternative energy facilities. The company's production facilities produces biofuels or electricity by utilizing fuel derived from its agricultural waste management processes or alternative fuel sources, such as waste coal. EPC, through its subsidiary, Microgy, Inc., develops and deploys a technology for the extraction of methane gas from animal wastes and other organic wastes, which is useful for electricity or thermal energy generation. In addition, the company produces electricity through a waste coal-fired electric generating station in Venango County. EPC was founded by Joseph E. Cresci and Donald A. Livingston in 1982 and is headquartered in Portsmouth, New Hampshire.


ACTIVE POWER INC (ACPW)

Active Power, Inc. (API) engages in the design, manufacture, and marketing of battery-free power products that provide electric power in the United States, Europe, and Africa. It offers CleanSource UPS, a battery-free uninterruptible power supply (UPS) under the Caterpillar brand name, Cat UPS. The company also provides a battery-free DC system, CleanSource DC that is used as a bridging energy source in power quality installations and compatible with various UPS brands. API's family of battery-free UPS products ranges from 65 kVA1200 kVA. In addition, it develops GenSTART, a battery-free, starting modular system that adds additional lines of availability to multiple standby generator sets. API distributes its products through various channels, including original equipment manufacturers, independent representatives, and direct sales personnel. The company, formerly known as Magnetic Bearing Technologies, Inc., was founded by Joseph F. Pinkerton in 1992. It changed its name to Active Power, Inc. in 1996. The company is headquartered in Austin, Texas.


EVERGREEN ENERGY INC (EEE)

Evergreen Energy, Inc., together with its subsidiaries, provides energy, environmental, and economic solutions to industrial and public utility markets in the United States and internationally. Its K-Fuel process uses heat and pressure to physically and chemically transform high moisture and low-Btu coals, such as subbituminous coal and lignite, into lower-emission fuel. The K-Fuel process also reduces mercury content, sulfur dioxide, nitrous oxides, and carbon dioxide emissions. In addition, Evergreen licenses its technology to third parties. The company was founded in 1981. It was formerly known as KFx, Inc. and changed its name to Evergreen Energy, Inc. in 2006. Evergreen is headquartered in Denver, Colorado.