| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Aquator Ltd | 02304627 | 12/07/2002 | Dissolved |
| Aquator Ltd | 02304627 | 12/07/2002 | Dissolved |
| Aquator Services Ltd | 02277596 | 12/07/2002 | Dissolved |
| Azurix International Ltd | 03746977 | 01/10/2000 | Dissolved |
| Dwr Gwalia Cyfyngedig | 04124563 | 12/07/2002 | Dissolved |
| Dwr Gwalia Cyfyngedig | 04124563 | 12/07/2002 | Dissolved |
| PROGRESSIVE WATER LIMITED | 09454289 | 23/02/2015 | Dissolved |
| Uk Water International Ltd | 03074610 | 12/07/2002 | Dissolved |
| Uk Water International Ltd | 03074610 | 12/07/2002 | Dissolved |
| Water Management International Ltd | 02933201 | 12/07/2002 | Dissolved |
| Water Management International Ltd | 02933201 | 12/07/2002 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Azurix Europe Ltd. | 03570749 | 01/10/2000 | 06/03/2002 | Dissolved |
| GENECO LIMITED | 06842738 | 01/04/2009 | 30/11/2015 | One Red Flag |
| WESSEX ELECTRICITY UTILITIES LIMITED | 06718971 | 07/11/2008 | 08/12/2015 | Dissolved |
| WESSEX ELECTRICITY UTILITIES LIMITED | 06718971 | 08/10/2008 | 07/11/2008 | Dissolved |
| WESSEX LOGISTICS LIMITED | 02306465 | 12/07/2002 | 30/11/2015 | Dissolved |
| WESSEX LOGISTICS LIMITED | 02306465 | 12/07/2002 | 25/02/2016 | Dissolved |
| WESSEX PROMOTIONS LIMITED | 05421311 | 11/04/2005 | 30/11/2015 | Dissolved |
| WESSEX PROMOTIONS LIMITED | 05421311 | 11/04/2005 | 25/02/2016 | Dissolved |
| WESSEX PROPERTY SERVICES LIMITED | 02277590 | 12/07/2002 | 08/12/2015 | Dissolved |
| WESSEX SPRING WATER LIMITED | 02281033 | 12/07/2002 | 30/11/2015 | Dissolved |
| WESSEX SPRING WATER LIMITED | 02281033 | 12/07/2002 | 25/02/2016 | Dissolved |
| WESSEX UTILITY SOLUTIONS LIMITED | 06718997 | 07/11/2008 | 30/11/2015 | Silver |
| WESSEX UTILITY SOLUTIONS LIMITED | 06718997 | 08/10/2008 | 07/11/2008 | Silver |
| WESSEX WATER COMMERCIAL LIMITED | 02372795 | 12/07/2002 | 30/11/2015 | Dissolved |
| WESSEX WATER ENGINEERING SERVICES LIMITED | 02286860 | 12/07/2002 | 30/11/2015 | Dissolved |
| WESSEX WATER ENGINEERING SERVICES LIMITED | 02286860 | 12/07/2002 | 25/02/2016 | Dissolved |
| WESSEX WATER ENTERPRISES LIMITED | 02279151 | 12/07/2002 | 30/11/2015 | Bronze |
| WESSEX WATER LIMITED | 02366633 | 12/07/2002 | 30/11/2015 | Bronze |
| WESSEX WATER SERVICES FINANCE PLC | 03704265 | 12/07/2002 | 30/11/2015 | Bronze |
| WESSEX WATER SERVICES LIMITED | 02366648 | 12/07/2002 | 30/11/2015 | Bronze |
| WESSEX WATER TRUSTEE COMPANY LIMITED | 02278257 | 12/07/2002 | 30/11/2015 | Not Trading |
| WESSEX WATER TRUSTEE COMPANY LIMITED | 02278257 | 12/07/2002 | 25/02/2016 | Not Trading |
| YTL EDUCATION (UK) LIMITED | 04906041 | 19/09/2003 | 30/11/2015 | Not Trading |
| YTL EDUCATION (UK) LIMITED | 04906041 | 19/09/2003 | 25/02/2016 | Not Trading |
| YTL ENGINEERING LIMITED | 03696600 | 12/07/2002 | 30/11/2015 | Dissolved |
| YTL EVENTS LIMITED | 04776317 | 23/05/2003 | 30/11/2015 | Not Trading |
| YTL SERVICES LIMITED | 02277608 | 12/07/2002 | 30/11/2015 | Not Trading |
| YTL SERVICES LIMITED | 02277608 | 12/07/2002 | 25/02/2016 | Not Trading |