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| ????–2010 | 2010–2023 | 2023–present |
????–2010[]
2010–2023[]
Central Maine Power's history of its own distinct identity ended on December 21, 2010, when a new logo, based its corporate parent Iberdrola's logo, was presented.
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):  |