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.

Unitil Corporation company serves about 100,500 electric customers and 70,000 natural gas customers. Unitil Energy Systems provides regulated electric utility services to 72,600 customers in New Hampshire, and subsidiary Fitchburg Gas and Electric has some 27,900 power and 15,120 natural gas customers in Massachusetts. Unitil's utility units provide retail supply services to customers who don't choose to purchase energy from a third-party marketer. Indirect subsidiary, Usource LLC, provides energy brokerage service to large energy users throughout the Northeast seeking competitive power or natural gas supplies.

Yankee Gas Services does not ride a pony into town like a Yankee Doodle Dandy, but it does pipe a lot of natural gas to 71 central and southwest Connecticut towns and cities. With approximately 205,000 commercial, industrial, and residential customers, the company, a subsidiary of Yankee Energy System (which is itself a unit of Northeast Utilities), is the largest natural gas distributor in Connecticut. Northeast Utilities Service Company, also a subsidiary of Northeast Utilities, performs administrative and accounting duties for Yankee Gas Services.

Public utility Green Mountain Power (GMP) lights up the hills of Vermont, supplying electricity to 95,000 customers in the state. The utility also markets wholesale electricity in New England. The company operates more than 4,720 miles of transmission and distribution lines and owns a minority stake in high-voltage transmission operator Vermont Electric Power (VELCO). GMP owns about 150 MW of capacity from hydroelectric and fossil-fueled power plants, but it purchases most of its power from other utilities. The company's long-term contracts with Vermont Yankee and Hydro-Quebec provide about 75% of GMP's power supply.

Sembcorp Industries can help your ship keep its shape or sell you electricity, among other things. Its 62%-held Sembcorp Marine subsidiary, the #2 offshore oil rig maker in the world, specializes in marine and offshore engineering services such as ship building and conversion, repair, and rig building. Sembcorp Utilities (also known as SembUtilities) is a leading retailer of electricity in Singapore; it also provides utility services and water management services (wastewater, reclaimed water, desalination, water for industrial use). Singapore's government (through investment company Temasek Holdings) controls 49% of Sembcorp Industries, which serves clients primarily in the Asia/Pacific region and in Europe.

The lights are big and bright deep in the heart of the Lone Star State thanks to AEP Texas Central (TCC). The utility, formerly named Central Power and Light, provides regulated electric utility services to 766.000 customers in its 100,000 sq. ml. service territory in south and west Texas. TCC operates more than 29,600 miles of transmission and distribution lines in Texas; its transmission assets are managed by ERCOT. In addition to distributing power, AEP Texas also reads electric meters. maintains and repairs power lines, and takes care of connections and disconnections.

New Jersey Natural Gas is the prinicipal subsidiary of New Jersey Resources, a Fortune 1000 company, which provides reliable energy and natural gas services including transportation, distribution, and asset management in states from the Gulf Coast to the New England regions, including the Mid-Continent region, the West Coast and Canada, while investing in and maintaining an extensive infrastructure to support future growth. With over $2.5 billion in annual revenues, NJR safely and reliably operates and maintains 6,700 miles of natural gas transportation and distribution infrastructure to serve nearly half a million customers; develops and manages a diverse portfolio of more than 777,000 dth/d of transportation capacity and 52 Bcf of storage capacity; and provides appliance installation, repair and contract service to approximately 150,000 homes and businesses. Additionally, NJR holds investments in midstream assets through equity partnerships including Steckman Ridge and Iroquois. Through Conserve to Preserve®, NJR is helping customers save energy and money by promoting conservation and encouraging efficiency.

First Electric Cooperative wasn't the first electric cooperative ever formed, but it was the first such entity created in its home state. The member-owned utility distributes power to more than 85,000 customers in 17 central and southeastern Arkansas counties. It also offers its members a range of energy products and value-added services, including energy efficient Marathon water heaters, surge and lightning protection equipment, and compact fluorescent light bulbs. Some 72% of the cooperative's revenues come from residential customers; commercial and industrial customers account for another 20%, and the rest comes from such sources as irrigation and street lighting.

Decatur Utilities (the operating name of the Municipal Utilities Board of Decatur) caters to the power, gas, water, and wastewater needs of more than 30,000 residents (including 14,600 gas customers) of the city of Decatur, and Morgan County, in Alabama. In an area that experiences heavy rain, Decatur Utilities spends approximately $1 million each year to repair clay sewer pipe and brick manholes and other aging infrastructure. The Municipal Utilities Board of Decatur was created by the Alabama Legislature in 1939 to provide safe and reliable utility services to the city of Decatur.

AES is one of the world's leading independent power producers. The company has interests in more than 120 generation facilities in about 30 countries throughout the Americas, Asia, Africa, Europe, and the Middle East that give it a combined net generating capacity of 40,300 MW. AES sells electricity to utilities and other energy marketers through wholesale contracts or on the spot market. AES also sells power directly to customers worldwide through its interests in distribution utilities, mainly in Latin America. In 2009 the company had 1,900 MW of power plants under development in four countries.

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