Sierra Pacific Resources, through its subsidiaries, engages in the generation, transmission, and distribution of electric energy in southern Nevada. It operates in three segments: NPC Electric, SPPC Electric, and SPPC Natural Gas. The NPC Electric segment consists of approximately 27 gas, oil, and coal generating units with a combined capacity of 3,148 megawatts. As of December 31, 2006, it served approximately 807,000 residential, commercial, industrial, and wholesale customers in Las Vegas, no ...

Vimpel-Communications provides wireless telecommunications services in Russia, Kazakhstan, Ukraine, Uzbekistan, and Tajikistan. The company offers its services under the Beeline, K-mobile, EXCESS, and Armentel brand names. Its wireless services include voice telephony services; value added services, including voice mail, short messaging service, call forwarding, wireless Internet access, entertainment and information services, and music and data transmission services; and access to both national ...

NiSource Inc. (NYSE: NI), based in Merrillville, Ind., is a Fortune 500 company engaged in natural gas transmission, storage and distribution, as well as electric generation, transmission and distribution. NiSource operating companies deliver energy to 3.8 million customers located within the high- demand energy corridor stretching from the Gulf Coast through the Midwest to New England.

NRG Energy, Inc. operates as a wholesale power generation company primarily in the United States. It engages in the ownership, development, construction, and operation of power generation facilities; and trading of energy, capacity, and related products, as well as engages in transacting and trading of fuel and transportation services. The company also has locations in Australia and Germany. As of December 31, 2006, the company's power generation assets consisted of approximately 10,470 megawatt ...

PPL Corporation, an energy and utility holding company, engages in the generation, transmission, and distribution of electricity primarily in the northeastern and western portions of the United States. As of December 31, 2006, it served approximately 5.1 million customers in Pennsylvania, the United Kingdom, and Latin America. The company also distributes natural gas and propane principally in Pennsylvania, Maryland, and Delaware, serving approximately 110,000 customers. In addition, PPL Corpora ...

TransCanada Corporation provides energy infrastructure principally in North America. It has two segments: Pipelines and Energy. The Pipelines segment focuses on natural gas transmission network in Canada, the United States, and Mexico. Its pipelines export natural gas from Western Canada Sedimentary Basin to eastern Canada. The company also exports its products to west, midwest, and northeast United States through its wholly owned pipeline systems, which include Canadian Mainline, Gas Transmissi ...

PGE Corporation, through its subsidiaries, engages in the generation, procurement, and transmission of electricity; and procurement, transportation, and storage of natural gas primarily in the in northern and central California. It owns and operates an integrated natural gas transportation, storage, and distribution system, as well as underground natural gas storage fields in California. The company primarily serves agricultural, industrial, residential, and commercial customers; public street a ...

ABB, Ltd. provides power and automation technologies to utility and industry customers worldwide. The company's Power Products division offers transmission and distribution products and services, including high-and medium-voltage switchgear and apparatus, circuit breakers, and power and distribution transformers. ABB's Power Systems division offers network management, utility communication, transmission and distribution substations, flexible alternating current transmission systems, high-voltage ...

Duke Energy Corporation, together with its subsidiaries, engages in the natural gas and electric businesses in the Americas. The company operates in six divisions: Franchised Electric, Natural Gas Transmission, Field Services, Duke Energy North America (DENA), International Energy, and Crescent Resources. 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 ...