American States Water Company, through its subsidiaries, provides water and electric utility services. It engages in the purchase, production, and distribution of water primarily for residential and commercial customers. In addition, the company provides water and wastewater services on a contract basis, including billing and meter reading, water marketing, and the operation and maintenance of water and wastewater systems to various municipalities, the U.S. government, and private entities.

Alabama Power is the second largest subsidiary of Southern Company, the nation’s largest generator of electricity. It provides the valuable combination of competitive prices, reliable electricity supply and unparalleled service to 1.3 million homes, businesses and industries in the southern two-thirds of Alabama.

AGL Resources is the preeminent distributor of natural gas on the East Coast, with six utilities serving 2.2 million customers. This core business is supported by related companies — an asset management company, salt-dome storage facilities and an active business development division — dedicated to ensuring a reliable supply of natural gas to AGL Resources’ residential, commercial and industrial customers.

Able Energy, Inc. includes a number of corporations engaged in the retail distribution and provision of services relating to heating oil, propane, diesel, kerosene, gasoline (Liquid Energy) and related energy products and services. In addition to selling Liquid Energy products, Able Energy offers HVAC (heating ventilation and air conditioning) service, repair and installation.

Sierra Pacific Resources provides electricity to over 1 million electric customers throughout Nevada and in northeastern California. Among the many communities it serves are Las Vegas, Reno-Sparks, Henderson, Elko and South Lake Tahoe. Sierra Pacific Power also provides natural gas to over 120,000 customers in the Reno-Sparks area.

Atmos Energy is the largest pure natural gas distributor in the United States. It delivers natural gas to more than 3.1 million residential, commercial, industrial and public-authority customers. It is known as one of the most efficient natural gas utilities in the industry. It serves 566 customers per employee, as compared with an average of 546 customers per employee served by its peer group.

Origin Energy is a leading Australian energy company which supplies natural gas, electricity and LP Gas to more than two million business and residential customers in Australia, New Zealand the Pacific. With more than 3,000 employees and more than 140 years experience meeting the energy needs of Australians, the expertise comes from the understanding and involvement across the supply chain that delivers energy to homes and businesses.

Nalco Company is the leading global provider of integrated water treatment and process improvement services, chemicals and equipment programs for a variety of industrial and institutional customers. Its products and services are used in water treatment applications to prevent corrosion, contamination and the buildup of harmful deposits, or in production processes to enhance process efficiency and improve its customers’ end products.

TransAlta is a power generation and wholesale marketing company focused on creating long-term shareholder value. It maintains a low-risk profile for investors by operating a highly contracted portfolio of assets in Canada, the U.S., Mexico and Australia.

DPL Inc. is a regional electric energy and utility company. It provides service to over 500,000 retail customers in West Central Ohio. It owns and operates approximately 4,400 megawatts of generation capacity, of which 2,800 megawatts are low cost coal-fired units and 1,600 megawatts are natural gas fired peaking units.

Red Electrica is the first company in the world devoted exclusively to electricity transmission and operation. It guarantees a balance between energy production and consumption, ensuring quality supply in all places and at all times and providing the market system with the safety and liquidity it needs.

MDU Resources Group, Inc., provides value-added natural resource products and related services that are essential to energy and transportation infrastructure. MDU Resources includes natural gas and oil production, construction materials and mining, domestic and international independent power production, electric and natural gas utilities, natural gas pipelines and energy services, and utility services.

OGE Energy Corp., with headquarters in Oklahoma City, is the parent company of Oklahoma Gas and Electric Company (OG&E), a regulated electric utility, and Enogex Inc., a natural gas pipeline business. OGE Energy and its subsidiaries have about 3,000 employees.

International Power is a leading independent power generation company with interests in 36 power stations in 17 countries around the world. It owns an asset portfolio that can generate enough power to light up 220 million light bulbs at any one time, or is the equivalent to the installed power generation capacity in Austria.

UGI Utilities, Inc. is a natural gas and electric utility headquartered in Reading, Pennsylvania. The company is a wholly owned subsidiary of UGI Corporation, based in Valley Forge.

Equitable Resources is an integrated energy company with emphasis on Appalachian area natural-gas supply, natural-gas transmission and distribution, and leading-edge energy-management services. Equitable Resources, its divisions and its subsidiaries, offer natural gas products and energy services to wholesale and retail customers through three business segments: Equitable Utilities, Equitable Supply and NORESCO.

Brocade Communications Systems, Inc. offers the industry’s leading intelligent platform for networking storage. Brocade-based SANs enable companies to more easily keep pace with rapid growth in data storage requirements, optimize asset utilization, increase productivity, and significantly reduce the total cost of ownership of their storage environments.

Saneamento Básico do Estado de São Paulo — SABESP is Brazil’s largest water company. It provides water services to some 21.3 million people through about 6 million connections. Sabesp offers sewage services through about 4.5 million connections to some 17.2 million people.

Questar Corporation is a natural gas-focused energy company with three principal subsidiaries — Questar Market Resources (gas and oil exploration, development and production; gas gathering and processing); Questar Pipeline (interstate gas transportation and storage); and Questar Gas (retail gas distribution).

Headquartered in Tampa, Florida, TECO Energy is an integrated energy provider with core businesses in the utility sector, complemented by a family of unregulated businesses. In addition to the regulated operations of Tampa Electric and Peoples Gas System, TECO Energy has interests in waterborne transportation, coal and synthetic fuel production and independent power.

Alliant Energy Corporation is an energy holding company with regulated utility providers as well as non-regulated companies involved in delivering energy-related products and services.

Mirant is a competitive energy company that produces and sells electricity in the United States, the Caribbean, and the Philippines. Mirant owns or leases more than 18,000 megawatts of electric generating capacity globally.

NStar is Massachusetts’ largest investor-owned electric and gas utility. It has been transmitting and delivering electricity and natural gas for more than 100 years. It serves nearly 1.4 million residential and business customers in over 100 Eastern Massachusetts communities.

Cemig is an integrated energy company engaged primarily in the generation, transmission and distribution of electricity in the State of Minas Gerais, Brazil. The Company is the second largest distribution utility and the fourth according to the installed generating capacity. It has the largest distribution network in Latin America.

AEM Milano operates power generation plants, distributes electricity and natural gas to regulated customers, and wholesale electricity and gas to buyers. It also owns a fiber-optic network that covers the city.

CMS Energy is an integrated energy company headquartered in Jackson, Michigan. Its two principal subsidiaries are Consumers Energy and CMS Enterprises. Consumers Energy is a public utility that provides natural gas and electricity to more than 6 million of Michigan’s 10 million residents and serves customers in all 68 of the state’s Lower Peninsula counties. CMS Enterprises’ primary businesses are independent power production and natural gas transmission.

Australian Gas Light (AGL) has been a major participant in the Australian energy industry since 1837. It began as a privately-owned gas utility in New South Wales and since then has built an extensive energy business across Australia. It is a major retailer of gas and electricity to about three million customers.

GAIL (India) Ltd is India’s principal gas transmission and marketing company. GAIL has expanded into Gas Processing, Petrochemicals, Liquefied Petroleum Gas Transmission and Telecommunications. The company has also extended its presence in Power, Liquefied Natural Gas re-gasification, City Gas Distribution and Exploration & Production through equity and joint ventures participations. GAIL is rated among the top 10 Indian companies in terms of profits and revenue according to October 2003 ET 500, a list of top 500 companies in India compiled by the Economic Times daily.

Kelda Group provides water and waste water services to customers in the UK and US, employing over 3,000 people. Yorkshire Water is Kelda’s main UK subsidiary, providing water and waste water services to more than 4.7 million people and 140,000 businesses. Every day the company supplies more than 1.3 billion litres of high quality water to homes and businesses in Yorkshire. Through the efficient operation of its extensive network of sewers and waste water treatment works, it also ensures that the region’s domestic and industrial waste is returned safely to the environment.

The Hong Kong and China Gas Company, operating under the name Towngas, distributes natural gas to more than 1.5 million customers throughout Hong Kong. The company offers a full range of gas resources, including industrial fuels and commercial and residential gas appliances. It also operates two gas production plants and has real estate development operations. With several joint ventures in place, Towngas is one of the first outside organizations to develop major gas projects in mainland China.

For more than a century, Pinnacle West and its affiliates have provided energy and energy-related products to people and businesses throughout Arizona. Based in Phoenix, Pinnacle West has consolidated assets of $9.9 billion and annual revenues of $2.9 billion.

The largest affiliate, Arizona Public Service (APS), generates, sells and delivers electricity and energy-related products and services. APS serves more than a million customers in 11 of Arizona’s 15 counties, and is the operator and co-owner of the Palo Verde Nuclear Generating Station – a primary source of electricity for the Southwest.

Northeast Utilities provides reliable, reasonably priced electricity, gas, and energyservices in the northeastern United States. A Fortune 500 diversified energy company with regulated and competitive subsidiaries, Northeast Utilities provides “energy for a changing world.”

From Maine to Maryland, NU companies provide a full range of energy products and services to millions of residential and business customers. NU is committed to safety, quality service, expanding consumers’ energy options, and protecting the environment.

Korea Gas Corporation (KOGAS) was established in August 1983 by the Korean Government to promote the public interest and to improve the quality of people’s lives by supplying a convenient form of clean-burning energy — natural gas. KOGAS produces and supplies natural gas, purifies and sells gas-related by-products, builds and operates production facilities and distribution network, and explores, imports and exports Liquified Natural Gas (LNG) for domestic and overseas markets. KOGAS imports LNG from foreign countries including Indonesia and Malaysia and sells it to power generation plants and city gas - or gas utility - companies. The Company is also in the process of establishing a nationwide gas infrastructure.

Hokuriku Electric Power provides electricity in the Japanese prefectures of Fukui, Ishikawa, and Toyama. The utility owns and operates hydroelectric, fossil-fueled, and nuclear power plants that generate 6,000 MW of capacity. Hokuriku Electric Power distributes electricity to approximately 2 million customers in its service territory, which is located in the central region of Japan’s largest island. In response to liberalization in the country’s power market, the company has expanded into new business arenas, such as telecommunications and environmental services.

Calpine is the first independent power producer to develop an integrated system approach for its energy centers. By pooling generating facilities into unique energy systems in strategic power markets, Calpine can supply customers with customized energy packages from a variety of generating facilities.

Calpine has vast industry expertise and products that enable it to manage every aspect of power generation and optimize plant performance, lower fuel costs and maximize value. It is organized to be a customer-focused operating company.

Oneok, Inc. is a diversified energy company involved in oil and gas production, natural gas processing, gathering, storage and transmission in the mid-continent areas of the United States. The company’s energy services operations focuses primarily on natural gas and provide service to customers in most states.

Wisconsin Energy Corporation, headquartered in Milwaukee, Wisconsin, is a holding company with more than $9 billion of assets in a diversified portfolio of subsidiaries engaged in electric generation; electric, gas, steam and water distribution; and other non-utility businesses.

Scana was established in 1987, starting off as a company primarily providing products and services to the oil and gas related industry. It developed over time into a company with a strong foothold in the steel and marine industries. In 1995 the company was listed on the Oslo Stock Exchange.

Scana is an industrial group with approximately 1700 employees (of whom more than 750 are working in China), and with an annual turnover in the range of EUR 160 million.

Scana’s head office is located in Stavanger, which is one of the largest cities in Norway. Stavanger is an industrial and commercial hub, and one of Europe’s main centres for offshore oil and gas activities.Scana’s operating companies are located in Norway, Sweden and China.

CenterPoint Energy is the third largest publicly traded natural gas delivery company in the U.S. with nearly 3 million natural gas customers in six states. It is also the third largest energy company employer in Houston. It is one of the nation’s largest combined electricity and natural gas delivery companies with approximately 5 million metered electric and natural gas customers. CenterPoint Energy provides electricity transmission and distribution service for the Houston metropolitan area.

The Pipelines Group owns and operates two interstate pipelines, gathers natural gas, provides maintenance and technical services to third-party clients and installs our remote wellhead monitoring and measuring product, ServiceStar. The assets total approximately $17 billion and our revenues are about $8 billion. It employs more than 9,000 people in nine states.

Energy East is the utility holding company that distributes electricity and natural gas in four northeastern states through subsidiaries Berkshire Gas, Central Maine Power, Connecticut Natural Gas, Maine Natural Gas, New York State Electric & Gas, Rochester Gas and Electric, and Southern Connecticut Gas. Overall, Energy East serves 1.8 million electricity customers as well as 900,000 natural gas customers. Other operations include power generation, district heating and cooling, wholesale and retail energy marketing, gas transportation and processing, propane distribution, telecommunications, and energy infrastructure and management services.

Pepco Holdings distributes electricity to more than 1.8 million customers and natural gas to nearly 120,000 customers through its utility subsidiaries. Deregulation has taken effect in the region, and the utilities have sold most of their regulated power plants. Nonregulated operations include independent power production (more than 5,000 MW of generating capacity), wholesale and retail energy marketing, and energy management services. The company also has international energy interests.

Hongkong Electric Holdings Limited (HEH) is the holding company of the Hongkong Electric Group, which is primarily comprised of The Hongkong Electric Company, Limited (HEC), Hongkong Electric International Limited (HEI), Associated Technical Services Limited (ATS). HEC is engaged in the generation and supply of electricity for Hong Kong Island and Lamma Island. Its power station is located on Lamma Island with a total installed capacity of 3,420 megawatts, serving approximately 544,000 customers. HEI functions as the international investment arm of HEH. Its core business involves investments in power generation, transmission and distribution, as well as other power-related investments.

Kinder Morgan Management (KMR) was created in 2001 by pipeline operator Kinder Morgan, Inc.(KMI), to become general partner of Kinder Morgan Energy Partners (KMP). Kinder Morgan Management oversees KMP’s five business segments: pipelines that transport refined petroleum products (including gasoline, diesel, jet fuel, and natural gas liquids); natural gas pipelines; pipelines that transport carbon dioxide for oil field use; bulk terminals that handle coal, petroleum coke, and other products; and liquids terminals that handle refined petroleum products and chemicals. Kinder Morgan, Inc., controls Kinder Morgan Management and owns 20% of KMP.

Severn Trent is today an international group offering a wide range of services to the environment sector. It also operates in the USA and Belgium through several subsidiaries: Severn Trent Water distributes drinking water to millions of customers, Biffa Waste Services treats wastewater. Severn Trent Services offers a variety of solutions to improve the environment: sample analysis, water purification solutions, diagnostics, inspection and repair. Severn Trent Systems develops software solutions for right-on-time management of customer relations and services for the electricity, gas, water and telecommunications industries. Severn Trent Property is involved in urban planning and Haswell Consulting specializes in engineering without forgetting Aseriti( IT solutions and services) and Worsuite (work management and services).

Huaneng Power International Incorporated. The Group’s principal activity is the generation of electric power to regional and provincial power companies in China. In 2002, the Group acquired Shanghai Shidongkou First Power Plant, Taicang Power Company, Huaiyin Power Company and Changxing Power Plant . It now owns 13 power plants located in Liaoning, Hebei, Jiangsu, Fujian, Guangdong, Shanghai and Shandong provinces.

Reliant Energy (formerly Reliant Resources) relies on its status as a leading US independent power producer and marketer. The company has generating plants that give it a primarily fossil-fueled capacity of approximately 19,000 MW. Reliant Energy is a top competitive retail power supplier in Texas, where it serves 1.9 million customers. The company also markets energy commodities to wholesale customers; however, it is exiting the proprietary trading business due to volatile conditions in the energy market.

Shikoku Electric Power is one of 10 regional electric utilities licensed by the Japanese government to generate, transmit, and distribute power, Shikoku (known as Yonden in Japan) provides electricity to nearly 2.9 million customers on Shikoku Island. The company has a generating capacity of 6,900 MW, primarily from nuclear and fossil-fueled plants. Deregulation in the Japanese electric market has prompted Shikoku to expand beyond its power utility business into activities such as Internet access, cable TV, and remote monitoring and control systems. Shikoku also has real estate, engineering, aviation, and energy equipment manufacturing operations.

Hokkaido Electric Power Co. (HEPCO) distributes electricity to 3.7 million residential, commercial, and industrial customers on the northernmost Japanese island, Hokkaido. The company operates 46,000 miles of transmission and distribution lines, and it owns thermal, hydroelectric, and nuclear power plants with approximately 6,600 MW of capacity. HEPCO also purchases and markets wholesale energy; other operations include engineering and construction, energy consulting, electrical appliance sales, telecommunications, information technology, and utility related services.

Eletrobras is a publicly traded government holding company for Brazilian electric companies. Eletrobras’ subsidiaries generate and transmit approximately 60% of Brazil’s electric supply. Eletrobras has a generating capacity of about 30,000 MW, most of which comes from hydroelectric plants. The company had planned to divest generation assets, however, Brazil has revised its privatization strategy to make Eletrobras and its primary subsidiaries (Furnas, Chesf, Cgtee, Eletrosul, and Eletronorte) excluded from the scheme.

Vattenfall Europe is a vertically integrated energy company which is organised in business units along the value creation chain. Vattenfall Europe’s assets include opencast mines in the Lusatian region, large state-of-the-art power stations in eastern and northern Germany, and the transmission grid covering the whole of eastern Germany. They also cover HEW and Bewag, the energy utilities for the cities of Hamburg and Berlin, with their cogeneration plants and distribution and district heating networks. To generate power, Vattenfall Europe uses a broad range of primary energy sources such as lignite and hard coal, gas, hydropower and nuclear energy.