| CTRI | Centuri |
| HTO | H2O America |
| ELPC | Companhia Paranaense de Energia |
| CPK | Chesapeake Utilities |
| CEPU | Central Puerto |
| AWR | American States Water |
| HE | Hawaiian Electric Industries |
| CWT | California Water Service Group |
| SPH | Suburban Propane Partners |
| EDN | Empresa Distribuidora y Comercializadora Norte Sociedad Anónima |