| AEP | American Electric Power | DUK | Duke Energy | FE | FirstEnergy Corp | DRE | Sempra |
| ATO | Atmos Energy | ED | Consol Edison | NEE | NextEra Energy | VST | Vistra |
| AWK | American Water Works | EIX | Edison Intl | PEG | Public Service Energy & Gas | XEL | Xcel Energy |
| D | Dominion Res | EXC | Exelon Corp | SO | Southern Company |