| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| DRINKING WATER LIMITED | 04749403 | 29/10/2004 | Dissolved |
| DRINKING WATER SERVICES LIMITED | 04687554 | 29/10/2004 | Dissolved |
| DYNAMCO LIMITED | 02477864 | 20/12/2012 | Dissolved |
| EASTBOURNE WATER LIMITED | 02679876 | 20/12/2012 | Dissolved |
| MID SOUTHERN WATER LIMITED | 02635467 | 20/12/2012 | Dissolved |
| MID-SUSSEX WATER LIMITED | 02569593 | 20/12/2012 | Dissolved |
| MKW HOLDCO 2 LIMITED | 05265399 | 20/12/2012 | Dissolved |
| Mid Kent Financing Ltd | 04493385 | 19/12/2007 | Dissolved |
| Mid Kent Water Ltd | 02559449 | 19/12/2007 | Dissolved |
| OPTIMUM INFORMATION SYSTEMS LIMITED | 02895316 | 20/12/2012 | Dissolved |
| SOUTHERN UTILITIES LIMITED | 02246962 | 20/12/2012 | Dissolved |
| WATERCALL LIMITED | 02290091 | 02/10/2006 | Dissolved |
| WEST KENT WATER LIMITED | 02679875 | 20/12/2012 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CASTLE WATER (SOUTH EAST) LIMITED | 03037009 | 04/07/2005 | 01/11/2006 | Amber |
| DYNAMCO LIMITED | 02477864 | 02/10/2006 | 16/03/2011 | Dissolved |
| EASTBOURNE WATER LIMITED | 02679876 | 02/10/2006 | 16/03/2011 | Dissolved |
| HALCROW WATER SERVICES LIMITED | 03055857 | 20/09/2005 | 31/07/2006 | Dissolved |
| HASTINGS WATER (UK) LIMITED | 04866247 | 02/10/2006 | 16/03/2011 | One Red Flag |
| HDF (UK) HOLDINGS LIMITED | 05462865 | 09/03/2007 | 20/12/2010 | Bronze |
| MID KENT FISHERIES LIMITED | 04587363 | 04/07/2005 | 01/11/2006 | Strike Off |
| MID KENT PENSION TRUSTEE LIMITED | 03483666 | 05/08/2003 | 01/11/2006 | Not Trading |
| MID SOUTHERN WATER LIMITED | 02635467 | 02/10/2006 | 16/03/2011 | Dissolved |
| MID-SUSSEX WATER LIMITED | 02569593 | 02/10/2006 | 16/03/2011 | Dissolved |
| MKW HOLDCO 1 | 05265406 | 19/12/2007 | 16/03/2011 | Silver |
| MKW HOLDCO 2 LIMITED | 05265399 | 19/12/2007 | 16/03/2011 | Dissolved |
| Mid Kent Financing Ltd | 04493385 | 25/04/2005 | 01/11/2006 | Dissolved |
| Mid Kent Water Ltd | 02559449 | 31/07/2003 | 19/08/2003 | Dissolved |
| Mid Kent Water Ltd | 02559449 | 10/05/2000 | 02/10/2006 | Dissolved |
| OPTIMUM INFORMATION SYSTEMS LIMITED | 02895316 | 02/10/2006 | 16/03/2011 | Dissolved |
| SOUTH EAST WATER (HOLDINGS) LIMITED | 04771490 | 02/10/2006 | 16/03/2011 | Bronze |
| SOUTH EAST WATER LIMITED | 02679874 | 02/10/2006 | 31/07/2020 | One Red Flag |
| SOUTHERN UTILITIES (HOLDINGS) LIMITED | 02049449 | 20/12/2012 | 31/07/2020 | Not Trading |
| SOUTHERN UTILITIES LIMITED | 02246962 | 02/10/2006 | 16/03/2011 | Dissolved |
| SWAN GROUP | 02288754 | 25/04/2005 | 01/11/2006 | Silver |
| SWAN PROPERTY LIMITED | 04529346 | 19/12/2007 | 31/07/2020 | Silver |
| UK WATER INDUSTRY RESEARCH LIMITED | 02862807 | 01/07/2003 | 15/10/2012 | Bronze |
| WATER UK | 03539600 | 01/01/2006 | 21/05/2010 | Bronze |
| WEST KENT WATER LIMITED | 02679875 | 02/10/2006 | 16/03/2011 | Dissolved |