Niska Gas Storage Partners LLC owns and operates natural gas storage assets in North America. It owns or contracts for approximately 185.5 billion cubic feet of total gas storage capacity. Niska Gas Storage Partners LLC owns and operates gas storage facilities in Alberta, Canada, as well as in northern California and Oklahoma, the United States. Its gas storage customers include financial institutions, producers, marketers, power generators, pipelines, and municipalities. The company was founded in 2006 and is headquartered in Houston, Texas.

NorthWestern, once a holding company for several energy-related businesses, is now blowing in one direction only -- providing power and gas through regulated utilites. Through its NorthWestern Energy subsidiary, the company provides electricity and natural gas to about 661,000 customers in Montana, Nebraska, and South Dakota. In Montana it delivers electricity to approximately 335,000 customers in 187 communities and surrounding rural areas, 15 rural electric cooperatives, and in Wyoming to the Yellowstone National Park. NorthWestern delivers gas to 180,100 Montana customers. In Nebraska and South Dakota it sells natural gas to 85,5100 customers.

NORESCO provides utility customers in the US with infrastructure development, design/build services, commissioning strategies, financing, and client-centered asset management services. The company develops and implements build/own/operate distributed generation, cogeneration, or combined heat and power projects; arranges, on a consulting basis, commodity electricity or gas supply; and provides firm contracting of energy supply. It also holds interests in independent power plants. Global leader in HVAC products and systems Carrier, a unit of UTC, owns NORESCO.

Pinnacle West Capital is at the peak of the energy pyramid in Arizona. It is the holding company for the state's largest electric utility, Arizona Public Service (APS), which transmits and distributes electricity to 1.1 million residential, commercial, and industrial customers throughout most of the state. The utility also has more than 6,280 MW of generating capacity. Through APS and other subsidiaries, Pinnacle West markets wholesale and retail power in Arizona and the western US. The company also develops and manages real estate and invests in energy ventures.

Enersis S.A., through its subsidiaries, engages in electric power generation, transmission, and distribution in Argentina, Brazil, Chile, Colombia, and Peru. It generates electricity using water, coal, oil or natural gas, and wind resources. The company also transports natural gas to refineries, generators, distribution companies, and industrial and mining clients; develops real estate; provides consulting and engineering services in various specialties; and engages in tunnel operation. In addition, it provides information technology (IT) services, which include outsourcing and infrastructure, data centers, contact centers and mass printing services, remote applications service provider, and assessment and implementation of technology solutions to support business processes; products integration, information systems services and technologies, and implementation and maintenance; and IT solution construction and development for high availability and complex business processes. Further, Enersis S.A. offers various products and services related to electricity comprising measuring and certification services; engineering, construction, assembly, and electric power operations; and energy consulting services to companies in various industrial sectors, such as retail, telecommunications, manufacturing, agro-industrial, and mining. As of December 31, 2008, it had an installed generation capacity of 13,893 MW, and supplied electricity to approximately 12 million customers. The company was formerly known as Compania Chilena Metropolitana de Distribucion Electrica S.A. and changed its name to Enersis S.A. in 1988. Enersis S.A. was founded in 1889 and is headquartered in Santiago, Chile. Enersis S.A. operates as a subsidiary of Endesa Latinoamerica SA.

Pepco Holdings has more power than any politician in the populace of the US capital. The holding company distributes electricity and natural gas through its Potomac Electric Power (Pepco), Delmarva Power & Light, and Atlantic City Electric utilities to about 1.9 million customers in Delaware, Maryland, New Jersey, and Washington, DC. Nonregulated operations include independent power production, wholesale and retail energy marketing, and energy management services, through the company's Pepco Energy Services units.

Mesa Power Group, it takes an oil tycoon from Texas to raise the profile of wind energy in North America. Controlled by veteran oilman and renewable energy proponent T. Boone Pickens, who gained national attention with the Pickens Plan, a campaign aimed at reducing US dependence on foreign oil, the company is engaged in developing and investing in wind power projects. It acquires these projects and completes development on them through a joint venture with GE called the American Wind Alliance (AWA). It typically targets projects in Canada and the US that have secured land control, access to transmission lines, and minimum capacity of 100 megawatts.

Wahlco likes to keep it clean. It designs and manufactures air pollution control equipment, specializing in ammonia handling, flue gas conditioning, nitrogen oxide control equipment which it installs at power plants and other industrial facilities, including cement plants, oil and gas refineries, pulp and paper mills, and steel mills. Wahlco also makes products such as low-watt density heaters and specialty thermocouples for industrial applications. The company's systems and equipment can be found in more than 500 locations in more than 17 countries. Wahlco was founded by a small group of experts in 1972.

Clay Electric Cooperative covers a lot of ground in Florida. The utility distributes electricity to 14 counties in the northeastern part of the state, including the suburbs of Jacksonville and Gainesville. It delivers power to its 165,000 residential, commercial, and industrial members over more than 12,800 miles of transmission lines. The consumer-owned utility offers electronic funds transfer, average billing, and a seniors payment plan to residential customers, and backup diesel power generation and special rate plans to businesses. The consumer-owned utility has a stake in Seminole Electric Cooperative, which provides generation services to Clay Electric and nine other cooperatives.

San Diego Gas & Electric (SDG&E) digs doling out energy in sandy Southern California. The company is a regulated utility that serves 1.4 million electricity customers and more than 840,000 natural gas customers in San Diego County and a portion of southern Orange County. The electric utility segment owns about 22,200 miles of power distribution lines, which serve about 25 communities; its 1,870 miles of transmission lines are managed by the California Independent System Operator. SDG&E also has limited power generation operations (it owns or contracts more than 5,500 MW of generating capacity). The gas utility operates almost 170 miles of transmission pipelines and about 8,420 miles of distribution mains.

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