The Laclede Group, Inc. operates as a public utility holding company. The company’s principal subsidiary, Laclede Gas Company, provides natural gas service to approximately 630,000 residential, commercial, and industrial customers in metropolitan St. Louis and surrounding counties in eastern Missouri. Its primary non-regulated subsidiary, Laclede Energy Resources, Inc., markets natural gas and related services to on-system utility transportation customers and customers outside of its utility’s traditional service area. The Laclede Group company was founded in 1857 and is based in St. Louis, Missouri.

ATCO operates worldwide in utilities, power generation, and related services. Majority-owned Canadian Utilities oversees most of the group's energy businesses, including ATCO Electric and ATCO Gas (transmission and distribution) and ATCO Power (generation). Other holdings include gas gatherer and processor ATCO Midstream, and gas transporter ATCO Pipelines. ATCO I-Tek provides IT, billing, and customer care services. ATCO Structures & Logistics manufactures modular buildings and provides logistical and noise abatement services. Utilities ATCO Electric (with nearly 207,000 customers) and ATCO Gas (with more than 1 million customers) account for the largest slice of ATCO's revenues.

California Water Service Group, through its subsidiaries, provides water utility and other related services in California, Washington, New Mexico, and Hawaii. It engages in the production, purchase, storage, treatment, testing, distribution, and sale of water for domestic, industrial, public, and irrigation uses, as well as for fire protection. The company also provides non-regulated water-related services, including the operation of water and recycled water systems; leasing communication antenna sites on its properties; meter reading and billing services; sewer and refuse billing services; lab services for water quality testing; selling surplus property; and the marketing and billing of third party insurance programs to residential customers. As of December 31, 2009, it served approximately 467,100 customers in 83 communities in California; 15,600 customers in the Tacoma and Olympia areas in Washington; 7,800 water and wastewater customers in the Belen, Los Lunas, and Elephant Butte areas in New Mexico; and 4,200 water and wastewater customers on the islands of Maui and Hawaii. The company was founded in 1926 and is headquartered in San Jose, California.

British Columbia Hydro and Power Authority, which operates as BC Hydro, distributes electricity to the 1.8 million residential and business customers. The province-owned utility owns more than 46,500 miles of transmission and distribution lines, and it operates hydroelectric and fossil-fueled power plants about 11,350 MW of generating capacity. Subsidiary Powerex markets and trades energy throughout North America. To increase efficiencies in green power production, in 2010 BC Hydro consolidated its transmission operations with those of the province-owned British Columbia Transmission. A Crown corporation owned by British Columbia, BC Hydro is regulated by British Columbia Utilities Commission.

Active Power, Inc., together with its subsidiaries, designs, manufactures, and markets critical power quality solutions. It provides various products that deliver continuous clean power, and protects customers from voltage fluctuations, such as surges and sags, and frequency fluctuations, as well as offer temporary power to bridge the gap between a power outage and the restoration of utility power. The company offers CleanSource UPS, a battery free uninterruptible power supply system (UPS) that integrates UPS electronics and flywheel energy storage system into one compact cabinet. Active Power, Inc. also provides CleanSource DC, which is a battery-free replacement option for lead-acid batteries for use in bridging power; CoolAir DC; CoolAir UPS; and GenSTART, which is a battery-free, starting modular system. It offers continuous power systems that comprise UPS system, switchgear, and a generator under the PowerHouse brand name. Active Power, Inc. also provides services, including engineering, installation, start-up, monitoring, and repair for its products. The company serves data centers, manufacturing, technology, broadcast and communications, financial, utilities, healthcare, government, and airport industries. It sells its products through direct sales employees, value added resellers, manufacturers representatives, distributors, strategic IT partners, and original equipment manufacturer partners in the United States, Europe, the Middle East, Africa, the Asia Pacific, and Latin America. The company was founded in 1992 and is headquartered in Austin, Texas.

EcoWater Systems is in a pristine spot. The company manufactures commercial and residential water treatment systems. It sells its products through a network of more than 1,400 dealers, wholesalers, and private-label retailers. Products include water refiners, conditioners, and purifiers, and innovations such as reverse osmosis drinking water systems. Founded in 1925, EcoWater Systems is a member of Berkshire Hathaway's Marmon Group and maintains its autonomous management. In addition to the US, the company operates in Canada, the UK, Europe, and China.

Anaheim Public Utilities,the municipal utility's power division serves residential, industrial, and commercial customers and has interests in fossil-fueled, nuclear, and alternative generation facilities. Its water division gets its supply from its water well system and from the Metropolitan Water District of Southern California. Anaheim Public Utilities is the only municipal water and electric utility in Orange County.

STP Nuclear Operating Company (STPNOC) is pulling out all the stops to make sure that the lights burn brightly in the Lone Star State. The company manages the South Texas Project Electric Generating Station on a 12,220-acre site near Bay City, Texas. The nuclear power plant's two reactors, which went into operation in 1988 and in 1989, produce about 2,700 MW of electricity and serve 2 million homes in Texas. The company is jointly owned by NRG Energy (44%), CPS Energy (40%), and Austin Energy (16%). STPNOC accounts for about 7.5% of the power consumed in Texas.

Guangzhou Development Industry helps keep the lights on in China's Pearl River Delta. Established in 1997, the company is the largest power producer in Guangzhou province, with stake in about 10 coal-fired power plants with 2,100 MW of generating capacity. Guangzhou's energy logistics division operates an 80,000-ton deep-water coal-loading terminal and a 340,000-ton coal storage field. Nansha Oil Terminal, its joint venture with BP, has expanded Guangzhou's oil products distribution services throughout the region. The company is also a shareholder in Guangzhou Northern No. 2 Ring Expressway, a key toll road operating in the Pearl River Delta

Hongkong Electric Holdings Limited, an investment holding company, engages in the generation, transmission, and distribution of electricity to commercial and industrial customers in Hong Kong and internationally. It holds interests in eight coal-fired units, five gas turbine units, two combined cycle units, and one wind turbine. The company also offers engineering consulting services to the electricity supply industry; and engages in advertising and financing activities. It operates in Australia, Thailand, Canada, the United Kingdom, New Zealand, and mainland China. The company was founded in 1889 and is based in Hong Kong, Hong Kong.

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