| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| SCOTTISH HYDRO ELECTRIC POWER DISTRIBUTION PLC | SC213460 | 30/06/2023 | Silver |
| SOUTHERN ELECTRIC POWER DISTRIBUTION PLC | 04094290 | 30/06/2023 | Silver |
| SSEN DISTRIBUTION LIMITED | SC742389 | 30/06/2023 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| G4S GOVERNMENT SERVICES LIMITED | 01450669 | 14/02/2018 | 02/11/2018 | Dissolved |
| G4S GURKHA SERVICES (UK) LIMITED | 06304482 | 14/02/2018 | 02/11/2018 | Dissolved |
| INNOVA PARK MANAGEMENT COMPANY LIMITED | 03080140 | 08/07/2022 | 30/03/2023 | One Red Flag |
| KENNET PROPERTIES LIMITED | 02498997 | 08/07/2022 | 30/03/2023 | One Red Flag |
| PWT PROJECTS LIMITED | 00090710 | 08/07/2022 | 30/03/2023 | Not Trading |
| THAMES WATER (KEMBLE) FINANCE PLC | 07516930 | 01/07/2019 | 22/02/2023 | Bronze |
| THAMES WATER COMMERCIAL SERVICES LIMITED | 08021020 | 08/07/2022 | 30/03/2023 | One Red Flag |
| THAMES WATER COMMERCIAL VENTURES FINANCE LIMITED | 08766303 | 08/07/2022 | 30/03/2023 | One Red Flag |
| THAMES WATER COMMERCIAL VENTURES HOLDINGS LIMITED | 08765700 | 08/07/2022 | 30/03/2023 | Amber |
| THAMES WATER INVESTMENTS LIMITED | 02567126 | 08/07/2022 | 30/03/2023 | Silver |
| THAMES WATER OVERSEAS LIMITED | 02909020 | 08/07/2022 | 30/03/2023 | Amber |
| THAMES WATER PROPERTY SERVICES LIMITED | 02606112 | 08/07/2022 | 30/03/2023 | One Red Flag |
| THAMES WATER UTILITIES FINANCE PLC | 02403744 | 01/07/2019 | 22/02/2023 | Silver |