|
|
|
| ????–2010 | 2010–2023 | 2023–present |
????–2010[]
|
LOGO MISSING |
2010–2023[]
|
|
LOGO MISSING |
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):  |