| CNP | CenterPoint Energy |
| IDA | IDACORP |
| ETR | Entergy |
| OGE | OGE Energy |
| PNW | Pinnacle West Capital |
| LNT | Alliant Energy |
| AEE | Ameren |
| MGEE | MGE Energy |
| POR | Portland General Electric Company |
| CMS | CMS Energy |
| DTE | DTE Energy Company |
| EBR | Centrais Elétricas Brasileiras S.A. - Eletrobrás |
| EVRG | Evergy |