| Name | Type | Sector | Country | Joined On |
|---|---|---|---|---|
| Centrais Electricas de Santa Catarina S.A. - Celesc S.A. | Company | Electricity | Brazil | 03-Oct-2006 |
| EDP- Energias do Brasil S/A | Company | Electricity | Brazil | 22-Jun-2006 |
| Centrais Electricas Brasileiras S.A. - ELETROBRAS | Company | Electricity | Brazil | 12-Jun-2006 |
| Enel Cien | Small or Medium-sized Enterprise | Electricity | Brazil | 23-Aug-2005 |
| Eletropaulo Metropolitana Eletricidade de Sao Paulo S/A | Company | Electricity | Brazil | 28-Jun-2005 |
| CPFL Energia S.A. | Company | Electricity | Brazil | 17-Feb-2004 |
| Elektro Redes S/A | Company | Electricity | Brazil | 18-Sep-2003 |
| Furnas Centrais Eletricas S/A | Company | Electricity | Brazil | 27-Jun-2003 |
| COPEL- Companhia Paranaense de Energia | Company | Electricity | Brazil | 26-Jul-2001 |