| HE | Hawaiian Electric Industries |
| OGE | OGE Energy |
| CEPU | Central Puerto |
| LNT | Alliant Energy |
| KEP | Korea Electric Power |
| PNM | PNM Resources |
| IDA | IDACORP |
| MGEE | MGE Energy |
| GNE | Genie Energy |
| ENIC | Enel Chile |
| EBR | Centrais Elétricas Brasileiras S.A. - Eletrobrás |
| POR | Portland General Electric Company |
| CMS | CMS Energy |