| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ADVANCED MINERALS LIMITED | 02489444 | 27/09/2018 | One Red Flag |
| ALLMAT (EAST SURREY) LIMITED | 02612101 | 27/09/2018 | One Red Flag |
| EAST SURREY HOLDINGS LIMITED | 02660370 | 27/09/2018 | Amber |
| SES HOME SERVICES LIMITED | 10167931 | 10/01/2024 | Silver |
| SES WATER LIMITED | 10422139 | 27/09/2018 | Not Trading |
| SESW HOLDING COMPANY LIMITED. | 04151446 | 21/08/2018 | Silver |
| SURREY DOWNS ESTATES LIMITED | 02465343 | 27/09/2018 | One Red Flag |
| SURREY DOWNS PROPERTY INVESTMENT LIMITED | 02783440 | 27/09/2018 | Silver |
| SUTTON AND EAST SURREY GROUP HOLDINGS LIMITED | 08369318 | 10/01/2024 | Amber |
| SUTTON AND EAST SURREY WATER PLC | 02447875 | 18/07/2018 | Silver |
| SUTTON AND EAST SURREY WATER SERVICES LIMITED | 02446416 | 10/01/2024 | One Red Flag |
| THE CHEAM GROUP PLC | 02563259 | 27/09/2018 | One Red Flag |
| THE SUTTON DISTRICT WATER PLC | 02457380 | 27/09/2018 | Not Trading |
| UK WATER INDUSTRY RESEARCH LIMITED | 02862807 | 02/02/2022 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| KEMBLE WATER INVESTMENTS LIMITED | 05859428 | 19/03/2014 | 13/04/2018 | Dissolved |
| KEMBLE WATER LIBERTY LIMITED | 05819270 | 19/03/2014 | 13/04/2018 | Dissolved |
| KEMBLE WATER LIMITED | 05859424 | 19/03/2014 | 13/04/2018 | Dissolved |
| KEMBLE WATER STRUCTURE LIMITED | 05819276 | 19/03/2014 | 13/04/2018 | Dissolved |
| PWT PROJECTS LIMITED | 00090710 | 01/10/2013 | 13/04/2018 | Not Trading |
| THAMES WATER (KEMBLE) FINANCE PLC | 07516930 | 06/09/2013 | 13/04/2018 | Bronze |
| THAMES WATER COMMERCIAL SERVICES LIMITED | 08021020 | 29/09/2017 | 13/04/2018 | One Red Flag |
| THAMES WATER HOLDINGS LIMITED | 05685587 | 19/03/2014 | 13/04/2018 | Dissolved |
| THAMES WATER INTERNATIONAL SERVICES HOLDINGS LIMITED | 01920229 | 01/10/2013 | 13/04/2018 | Dissolved |
| THAMES WATER INTERNATIONAL SERVICES LIMITED | 01939768 | 01/10/2013 | 13/04/2018 | Dissolved |
| THAMES WATER OVERSEAS CONSULTANCY LIMITED | 00757959 | 01/10/2013 | 13/04/2018 | Dissolved |
| THAMES WATER OVERSEAS LIMITED | 02909020 | 01/10/2013 | 13/04/2018 | Amber |
| THAMES WATER PRODUCTS LIMITED | 02249185 | 01/10/2013 | 13/04/2018 | Not Trading |
| THAMES WATER UTILITIES FINANCE PLC | 02403744 | 06/09/2013 | 13/04/2018 | Silver |
| WATER PROJECTS INTERNATIONAL LIMITED | 00258985 | 01/10/2013 | 13/04/2018 | Dissolved |