| AEP | American Electric Power |
| CMS | CMS Energy |
| CNP | CenterPoint Energy |
| D | Dominion Energy |
| DUK | Duke Energy |
| ED | Consolidated Edison |
| EIX | Edison |
| ETR | Entergy |
| EVRG | Evergy |
| FE | FirstEnergy |
| LNT | Alliant Energy |
| NEE | NextEra Energy |
| PEG | Public Service Enterprise Group |
| PNW | Pinnacle West Capital |
| PPL | PPL |
| SO | Southern |
| WEC | WEC Energy Group |