| Name | Country | Market Cap (US$) |
|---|
| Electricite de France SA | France | 109,027 |
| E.ON AG | Germany | 72,761 |
| BG Group plc | United Kingdom | 48,877 |
| RWE AG | Germany | 48,416 |
| Iberdrola S.A. | Spain | 43,850 |
| GDF Suez | France | 43,576 |
| Endesa SA | Spain | 42,744 |
| The Tokyo Electric Power Company. Inc. | Japan | 41,194 |
| Enel S.p.A. | Italy | 38,783 |
| Exelon Corporation | United States | 36,416 |
| The Southern Company | United States | 27,567 |
| National Grid PLC | United Kingdom | 25,497 |
| The Kansai Electric Power Co., Inc. | Japan | 23,618 |
| Union Fenosa S.A. | Spain | 22,408 |
| CEZ a.s. | Czech Republic | 22,260 |
| Chubu Electric Power Co., Inc. | Japan | 21,016 |
| FPL Group, Inc. | United States | 20,886 |
| Dominion Resources, Inc. | United States | 20,620 |
| Centrica plc | United Kingdom | 20,257 |
| China Yangtze Power Company Limited | China | 20,175 |
| Duke Energy Corporation | United States | 19,498 |
| Areva SA | France | 17,073 |
| Alstom | France | 16,678 |
| TransCanada Corporation | Canada | 16,654 |
| CLP Holdings Limited | Hong Kong | 16,145 |
| Public Service Enterprise Group Inc. | United States | 15,758 |
| Scottish & Southern Energy | United Kingdom | 15,749 |
| Entergy Corporation | United States | 15,703 |
| Oesterreichische Elektrizitaetswirtschafts AG | Austria | 15,446 |
| FirstEnergy Corporation | United States | 14,559 |
| PG&E Corporation | United States | 13,703 |
| EDP-Energias de Portugal SA | Portugal | 13,655 |
| American Electric Power Co., Inc. | United States | 13,430 |
| Gas Natural SDG S.A. | Spain | 13,085 |
| Energie Baden-Württemberg AG (EnBW) | Germany | 12,857 |
| Enbridge Inc. | Canada | 12,613 |
| PPL Corporation | United States | 12,267 |
| Tokyo Gas Co., Ltd. | Japan | 12,197 |
| Tohoku Electric Power Company, Inc. | Japan | 12,137 |
| Centrais Eletricas Bras (Eletrobras) | Brazil | 11,750 |
| British Energy Group plc | United Kingdom | 11,741 |
| Hongkong Electric Holdings Ltd. | Hong Kong | 11,592 |
| Kyushu Electric Power Co., Inc. | Japan | 11,011 |
| Saudi Electricity Company | Saudi Arabia | 10,884 |
| Consolidated Edison, Inc. | United States | 10,797 |
| Southwestern Energy Company | United States | 10,647 |
| Sempra Energy Corporation | United States | 10,639 |
| Edison International | United States | 10,605 |
| The Hong Kong & China Gas Co., Ltd. | Hong Kong | 10,472 |
| Atel Holding Ltd. | Switzerland | 10,440 |
| Progress Energy, Inc. | United States | 9,908 |
| The Williams Companies, Inc. | United States | 9,328 |
| The Chugoku Electric Power Co., Inc. | Japan | 8,945 |
| Osaka Gas Co., Ltd. | Japan | 8,858 |
| Suez Environnement Company | France | 8,839 |
| Enersis S.A. | Chile | 8,773 |
| Xcel Energy, Inc. | United States | 8,294 |
| Huaneng Power International Co. | China | 8,256 |
| Tenaga Nasional Bhd. | Malaysia | 7,904 |
| Polskie Gornictwo Naftowe I Gazownictwo SA | Poland | 7,148 |
| Cia Energetica Minas Gerais (CEMIG) | Brazil | 7,037 |
| Shikoku Electric Power Co., Inc. | Japan | 6,979 |
| Ameren Corporation | United States | 6,944 |
| Power Grid Corporation of India Limited | India | 6,795 |
| Edison SpA | Italy | 6,664 |
| Distrigaz SA | Belgium | 6,613 |
| Terna Spa (Transmissione Elettricita Rete Nazionale) | Italy | 6,374 |
| International Power plc | United Kingdom | 6,290 |
| United Utilities Group PLC | United Kingdom | 6,240 |
| CPFL Energia S.A. | Brazil | 6,146 |
| The AES Corporation | United States | 6,139 |
| El Paso Corporation | United States | 6,064 |
| Datang International Power Generation Company Limited | China | 5,849 |
| DTE Energy Company | United States | 5,836 |
| Allegheny Energy, Inc. | United States | 5,751 |
| Reliance Power Ltd | India | 5,627 |
| NRG Energy, Inc. | United States | 5,619 |
| Electric Power Development Co., Ltd. | Japan | 5,553 |
| The Hokuriku Electric Power Co. | Japan | 5,333 |
| GAIL (India) Limited | India | 5,174 |
| Wisconsin Energy Corporation | United States | 5,047 |
| Federal Grid Company | Russia | 5,034 |
| Tractebel Energia, S.A. | Brazil | 4,973 |
| GD Power Development Co., Ltd | China | 4,847 |
| The Hokkaido Electric Power Co. | Japan | 4,771 |
| Constellation Energy Group, Inc. | United States | 4,760 |
| BKW FMB Energie AG | Switzerland | 4,743 |
| ONEOK Partners, L.P. | United States | 4,696 |
| CenterPoint Energy | United States | 4,495 |
| Equitable Resources, Inc. | United States | 4,420 |
| Public Power Corporation S.A. | Greece | 4,296 |
| AGL Energy Ltd | Australia | 4,271 |
| Perusahaan Gas Negara (Persero) Tbk | Indonesia | 4,216 |
| SCANA Corporation | United States | 4,173 |
| Canadian Utilities Ltd. | Canada | 4,113 |
| TransAlta Corporation | Canada | 4,093 |
| Severn Trent plc | United Kingdom | 4,072 |
| MDU Resources Group, Inc. | United States | 3,921 |
| Northeast Utilities, Inc. | United States | 3,878 |
| NSTAR | United States | 3,774 |
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