|
|
|
| 1990-2007 | 2007-2023 | 2023-present |
1990-2007[]
2007-2023[]
2023-present[]
| Avangrid (United States): Berkshire Gas | Central Maine Power | Connecticut Natural Gas | Maine Natural Gas | NYSEG | Rochester Gas & Electric | Southern Connecticut Gas | United Illuminating Scottish Power (United Kingdom) Neoenergia (Brazil):  |