Electric power companies : Electrabel : Eletrobras : KEC International, KPIT Cummins, TATA Power, NTPC, Adani Power, BHEL, Torrent Power, Reliance Power, JSW Energy, SJVN limited, CESC Ltd : EDF - SNET : E.ON - RWE : Endesa - Iberdrola - Union Fenosa : Enel : WAPDA, K-Electric, KAPCO : Electricidade de Portugal : Tokyo Electric Power Company, Tohoku Electric Power, Okinawa Electric Power Company, Hokkaido Electric Power Company, Chubu Electric Power, Shikoku Electric Power, Kansai Electric Power Company, Kyushu Electric Power, Chugoku Electric Power Company, Hokuriku Electric Power Company : Southern California Edison, Pacific Gas & Electric, San Diego Gas & Electric, Commonwealth Edison, Consolidated Edison, Pepco, Dynegy, NSTAR, Reliant Energy, Southern Company, Hawaiian Electric Industries, Arizona Public Service, Detroit Edison, Consumers Energy : BC Hydro, Manitoba Hydro, Hydro Ottawa, Yukon Electrical Company, Northland Utilities, Nova Scotia Power, SaskPower, Toronto Hydro, Toronto Electric Light Company, Hydro One, EPCOR, Qulliq Energy Corporation, Hydro-Québec, Bullfrog Power : Vattenfall
Nuclear power companies : Pakistan Atomic Energy Commission, Pakistan Institute of Nuclear Science and Technology : Siemens : Areva - Areva NC : Nuclear Power Corporation of India : Westinghouse
Oil companies : Saudi Aramco : Petrobras, Dommo Energia : Cenovus Energy, Suncor Energy : PetroChina, Sinopec : Ecopetrol : Repsol-YPF : Total : BP, BG Group : Wintershall : Reliance Industries, ONGC, BPCL, HPCL, Oil India, Indian Oil, Essar Energy Cairn India, CPCl, Castrol India, Mangalore Refinary and Petrochemicals, Indraprastha Gas, Petronet LNG, Nagarjuna Oil and Gas : ENI : Nippon Oil : Pemex : Royal Dutch Shell, Schlumberger : StatoilHydro : Gazprom, Rosneft, Lukoil, Surgutneftegas, TNK-BP Holding : Transocean : Exxon Mobil, Chevron, Occidental Petroleum, Marathon Oil, Hess, Anadarko Petroleum : Rex International Holding Limited
Renewable energy companies : SunOpta : Suntech : Vestas : Conergy, Enercon, Nordex, Q-Cells : Suzlon, NHPC : Kyocera, Sharp Solar : Abengoa, Acciona, Gamesa : Ausra, General Electric, SunPower : Infigen Energy
