- Octopus Energy
- EDF Energy
- British Gas
- E.ON UK
- SSE PLC
United States:
- TXU Energy
- Reliant Energy
- Constellation Energy
- NRG Energy
- Direct Energy
Canada:
- Enbridge Gas
- Fortis Gas & Utility
- Direct Energy Regulated Services
- Enercare Solutions Inc.
- Toronto Hydro Corporation
Australia:
- EnergyAustralia
- AGL Energy
- Origin Energy
- Simply Energy
- Alinta Energy
France:
- EDF S.A.
- Engie S.A.
- TotalEnergies
- ENI
- CNR Group
Germany:
- E.ON Energie Deutschland
- RWE Generation SE
- Vattenfall Europe AG
- EnBW Energie Baden-Wurttemberg
- Statkraft
Ireland:
- Electric Ireland
- Bord Gáis Energy
- Energia
- Flogas Energia Ltd
- SSE Airtricity
Japan:
- TEPCO
- Kansai Electric Power
- Tohoku Electric Power
- Chubu Electric Power
- Kyushu Electric Power
Mexico:
- CFE (Comisión Federal de Electricidad)
- Iberdrola México
- Naturgy México
- Enel Green Power México
- Engie México
