| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| SUMITOMO CORPORATION EUROPE LIMITED | 01885117 | 01/04/2015 | Bronze |
| SUMMIT SESW HOLDINGS LIMITED | 08369330 | 27/06/2013 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| EAST SURREY HOLDINGS LIMITED | 02660370 | 11/06/2014 | 10/01/2024 | Amber |
| OSHIMA SHIPBUILDING EUROPE LIMITED | 15166896 | 26/09/2023 | 04/07/2024 | Amber |
| SES BUSINESS WATER LIMITED | 10167930 | 31/03/2022 | 10/01/2024 | Silver |
| SES HOME SERVICES LIMITED | 10167931 | 31/03/2022 | 10/01/2024 | Silver |
| SUMMIT WATER LIMITED | 08369311 | 27/06/2013 | 03/01/2019 | Amber |
| SUTTON AND EAST SURREY GROUP HOLDINGS LIMITED | 08369318 | 27/06/2013 | 03/01/2019 | Amber |
| SUTTON AND EAST SURREY WATER PLC | 02447875 | 05/06/2013 | 02/12/2014 | Silver |
| SUTTON AND EAST SURREY WATER SERVICES LIMITED | 02446416 | 01/04/2016 | 10/01/2024 | One Red Flag |
| THE JAPAN SOCIETY | 03371038 | 12/06/2012 | 18/07/2018 | Silver |