UGI Corporation, through its subsidiaries, engages in the distribution and marketing of energy products and related services. It operates in five segments: AmeriGas Propane, International Propane, Gas Utility, Electric Utility, and Energy Services. AmeriGas Propane segment distributes propane serving approximately 1.3 million residential, commercial, agricultural, motor fuel, wholesale, and industrial users in the United States and Canada. As of September 30, 2006, it operated 600 district locat ...

NSTAR is the largest Massachusetts-based, investor-owned electric and gas utility, with revenues of approximately $3.6 billion and assets totaling approximately $7.8 billion. NSTAR transmits and delivers electricity and gas to 1.1 million electric customers in 81 communities and 300,000 gas customers in 51 communities. NSTAR employs more than 3,000 employees in its regulated business.

TECO Energy, Inc., through its subsidiaries, engages in diversified energy-related operations in the United States. The company's activities primarily include generation, purchase, transmission, distribution, and sale of electric energy. The company provides retail electric services to approximately 661,000 customers in the west central Florida. It also purchases, distributes, and sells natural gas to approximately 332,000 customers, including residential, commercial, industrial, and electric po ...

Cameco Corporation, together with its subsidiaries, engages primarily in the exploration, development, mining, refining, conversion, and fabrication of uranium for sale as fuel for generating electricity in nuclear power reactors in Canada and internationally. It operates in four segments: Uranium, Fuel Services, Electricity, and Gold. The Uranium segment involves in the exploration for, mining, milling, purchase, and sale of uranium concentrate. It operates four mines in Canada and the United S ...

Energy East Corporation, through its subsidiaries, operates as an energy services and delivery company. It engages in the transmission and distribution of electricity in upstate New York and Maine, as well as engages in the transportation, storage, and distribution of regulated natural gas in upstate New York, Connecticut, Maine, and Massachusetts. As of December 31, 2006, the company served approximately two million electricity customers and one million natural gas customers. It also owns elect ...

CMS Energy's business strategy is focused primarily on its principal subsidiary, Consumers Energy, an electric and natural gas utility serving about 6.5 million of Michigan's 10 million residents. With its CMS Enterprises subsidiary, CMS Energy also is engaged in independent power generation in several states.

Pinnacle West Capital Corporation, through its subsidiaries, provides energy services and energy-related products, as well as engages in real estate activities in the United States. It operates in two segments, Regulated Electricity and Real Estate. Regulated Electricity segment consists of traditional regulated retail and wholesale electricity businesses, and related activities, as well as includes electricity generation, transmission, and distribution. Real Estate segment involves in real esta ...

Through expansion and acquisitions, CONSOL Energy has evolved from a single-fuel mining company into a multi-energy producer of coal, gas and electricity. CONSOL produces both high-Btu coal and gas, which collectively fuels two-thirds of all U.S. power generation, from reserves located mainly east of the Mississippi River. CONSOL Energy is a major fuel supplier to the electric power industry in the northeast quadrant of the United States. In addition, CONSOL Energy has expanded the use of its va ...