| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CK WILLIAM MIDCO 1 LIMITED | 10004197 | 20/09/2017 | N/A |
| NORTHERN GAS NETWORKS GENERAL PARTNER LIMITED | SC575600 | 06/09/2017 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AFFINITY WATER LIMITED | 02546950 | 19/12/2019 | 18/07/2022 | Amber |
| KELLEN CAPITAL LIMITED | 06393979 | 26/04/2024 | 18/07/2024 | Gold |
| KELLEN INVESTMENTS LIMITED | 05366077 | 26/04/2024 | 18/07/2024 | Silver |
| LIONRAI INVESTMENTS NO.1 LIMITED | 08611798 | 26/04/2024 | 18/07/2024 | Amber |
| LIONRAI INVESTMENTS NO.2 LIMITED | 08612000 | 26/04/2024 | 18/07/2024 | One Red Flag |
| PHOENIX DISTRIBUTION HOLDINGS LIMITED | 06455596 | 26/04/2024 | 18/07/2024 | Silver |
| PHOENIX ENERGY HOLDINGS LIMITED | 04135896 | 26/04/2024 | 18/07/2024 | One Red Flag |
| PHOENIX ENERGY SERVICES LIMITED | NI041410 | 26/04/2024 | 18/07/2024 | Silver |
| PHOENIX NATURAL GAS PP FINANCE PLC | 10636561 | 26/04/2024 | 18/07/2024 | Bronze |