| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CHAMBRE DE COMMERCE FRANCAISE DE GRANDE-BRETAGNE LIMITED | 00322528 | 01/01/2019 | Gold |
| EDF ENERGY (UK) LIMITED | 02622406 | 01/11/2017 | Amber |
| EDF ENERGY GROUP HOLDINGS LIMITED | 03261188 | 01/11/2017 | Dissolved |
| EDF ENERGY HOLDINGS LIMITED | 06930266 | 27/07/2017 | Bronze |
| EDF ENERGY LAKE LIMITED | 09200461 | 01/11/2017 | Silver |
| EDF ENERGY LIMITED | 02366852 | 01/11/2017 | Silver |
| LAKE ACQUISITIONS LIMITED | 06612465 | 01/11/2017 | Silver |
| NNB HOLDING COMPANY (HPC) LIMITED | 06937080 | 01/11/2017 | Bronze |
| NNB TOP COMPANY HPC (A) LTD | 09284749 | 01/11/2017 | Bronze |
| NNB TOP COMPANY HPC (B) LTD | 09284753 | 01/11/2017 | Bronze |
| NNB TOP COMPANY HPC (C) LIMITED | 13815312 | 23/12/2021 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ARABELLE SOLUTIONS UK LIMITED | 14767051 | 29/03/2023 | 31/05/2024 | Not Trading |
| EDF ENERGY (TSO) LIMITED | 03432165 | 24/10/2019 | 05/01/2024 | Bronze |
| EDF ENERGY SERVICES LIMITED | 10275207 | 06/02/2019 | 21/12/2023 | Silver |
| SIZEWELL C (HOLDING) LIMITED | 09284751 | 01/11/2017 | 01/12/2022 | Silver |