| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Bournemouth Water Plc | 02745054 | 27/04/1994 | Dissolved |
| Bournemouth Water Plc | 02745054 | 22/07/1993 | Dissolved |
| FISCHE LIMITED | 04983768 | 17/06/2010 | Dissolved |
| SURREY DOWNS ALARMS LIMITED | 02440217 | 12/01/2010 | Dissolved |
| THE COMPUTER SHOWER COMPANY LIMITED | 02490892 | 14/03/2014 | Dissolved |
| WATER COMPANIES(PENSION FUND)TRUSTEE COMPANY(THE) | 01163491 | 28/04/2010 | Bronze |
| West Hampshire Water Plc | 02745059 | 29/04/1994 | Dissolved |
| West Hampshire Water Plc | 02745059 | 22/07/1993 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ADVANCED MINERALS LIMITED | 02489444 | 17/06/2010 | 30/03/2020 | One Red Flag |
| ALDERNEY WATER LIMITED | 05598451 | 20/10/2005 | 03/06/2008 | Dissolved |
| ALLMAT (EAST SURREY) LIMITED | 02612101 | 12/01/2010 | 30/03/2020 | One Red Flag |
| AQUEDUCT CAPITAL (UK) LIMITED | 05590081 | 01/09/2008 | 04/02/2013 | Dissolved |
| BCL(LIBYA) LIMITED | 00868564 | 23/05/1991 | 29/10/1993 | Insolvent |
| BCL(LIBYA) LIMITED | 00868564 | 23/05/1991 | 11/07/1994 | Insolvent |
| BIWATER DESIGN LIMITED | 01324736 | 31/05/1992 | 29/10/1993 | Dissolved |
| BIWATER DESIGN LIMITED | 01324736 | 31/05/1992 | 11/07/1994 | Dissolved |
| BIWATER FILTRATION LIMITED | 00980731 | 31/05/1992 | 11/07/1994 | Dissolved |
| BIWATER PLANT HIRE LIMITED | 00838760 | 12/07/1991 | 11/07/1994 | Not Trading |
| BOURNEMOUTH WATER INVESTMENTS LIMITED | 05321147 | 09/03/2005 | 03/06/2008 | Dissolved |
| BOURNEMOUTH WATER INVESTMENTS LIMITED | 05321147 | 09/03/2005 | 03/06/2008 | Dissolved |
| BOURNEMOUTH WATER LIMITED | 02924312 | 25/04/1994 | 31/03/2008 | Dissolved |
| BOURNEMOUTH WATER LIMITED | 02924312 | 25/04/1994 | 03/06/2008 | Dissolved |
| BWH ENTERPRISES LIMITED | 03764413 | 29/04/1999 | 13/12/1999 | Dissolved |
| BWH ENTERPRISES LIMITED | 03764413 | 29/04/1999 | 03/06/2008 | Dissolved |
| EAST SURREY HOLDINGS LIMITED | 02660370 | 01/09/2008 | 27/02/2020 | Amber |
| MWH TREATMENT LIMITED | 01535477 | 01/01/1993 | 22/07/1993 | Silver |
| MWH TREATMENT LIMITED | 01535477 | 01/01/1993 | 22/07/1993 | Silver |
| PRE-HEAT LIMITED | 03266027 | 01/02/2007 | 03/06/2008 | Dissolved |
| SEMBCORP UTILITIES (BOURNEMOUTH) LIMITED | 06532827 | 12/03/2008 | 03/06/2008 | Dissolved |
| SES WATER LIMITED | 10422139 | 11/10/2016 | 29/02/2020 | Not Trading |
| SESW HOLDING COMPANY LIMITED. | 04151446 | 25/03/2009 | 30/03/2020 | Silver |
| SURREY DOWNS ESTATES LIMITED | 02465343 | 12/01/2010 | 30/03/2020 | One Red Flag |
| SURREY DOWNS PROPERTY INVESTMENT LIMITED | 02783440 | 12/01/2010 | 30/03/2020 | Silver |
| SUTTON AND EAST SURREY WATER PLC | 02447875 | 06/06/2008 | 27/11/2009 | Silver |
| SUTTON AND EAST SURREY WATER PLC | 02447875 | 06/06/2008 | 29/02/2020 | Silver |
| SUTTON AND EAST SURREY WATER SERVICES LIMITED | 02446416 | 12/01/2010 | 01/04/2016 | Amber |
| TCGL REALISATIONS NO. 1 LIMITED | 04176995 | 12/03/2001 | 25/09/2001 | Dissolved |
| THE CHEAM GROUP PLC | 02563259 | 08/07/2008 | 12/01/2010 | One Red Flag |
| THE CHEAM GROUP PLC | 02563259 | 12/01/2010 | 30/03/2020 | One Red Flag |
| THE SUTTON DISTRICT WATER PLC | 02457380 | 08/07/2008 | 12/01/2010 | Not Trading |
| THE SUTTON DISTRICT WATER PLC | 02457380 | 12/01/2010 | 30/03/2020 | Not Trading |
| THOMSON ENVIRONMENTAL CONSULTANTS EOT LIMITED | 12532418 | 24/03/2020 | 31/05/2022 | Not Trading |
| WATER UK | 03539600 | 30/03/2013 | 31/03/2023 | Bronze |
| WEST HAMPSHIRE WATER LIMITED | 05598453 | 20/10/2005 | 03/06/2008 | Dissolved |