| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| A.O. Lambert Consultancy Ltd | 03115092 | 20/07/1998 | Dissolved |
| Bristol Water Commercial Holdings Ltd | 04298948 | 04/10/2001 | Dissolved |
| Elementa Facilities Maintenance Ltd | 02780364 | 07/03/2001 | Dissolved |
| Newbore Systems Ltd | 03559385 | 07/05/1998 | Dissolved |
| The Gas Design Consultancy Ltd | 04153940 | 24/12/2003 | Dissolved |
| WATER COMPANIES(PENSION FUND)TRUSTEE COMPANY(THE) | 01163491 | 30/11/2007 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BRISTOL WATER CORE HOLDINGS LIMITED | 04637554 | 28/04/2003 | 30/09/2011 | Silver |
| BRISTOL WATER HOLDINGS LIMITED | 02630760 | 01/10/1991 | 30/09/2011 | Bronze |
| BRISTOL WATER HOLDINGS UK LIMITED | 04789566 | 14/08/2003 | 31/08/2009 | Bronze |
| BRISTOL WATER PLC | 02662226 | 12/12/1993 | 30/09/2011 | Amber |
| BRISTOL WESSEX BILLING SERVICES LIMITED | 04143955 | 31/05/2001 | 03/05/2011 | Bronze |
| Elementa Facilities Maintenance Ltd | 02780364 | 18/01/1993 | 17/05/1999 | Dissolved |
| KEMIRA PURTON LTD | SC141139 | 10/03/2001 | 17/12/2004 | Bronze |
| OPERATIONAL (UK) LIMITED | 02589285 | 07/03/2001 | 23/03/2002 | Gold |
| SUEZ ADVANCED SOLUTIONS UK LIMITED | 05687775 | 25/01/2006 | 14/07/2009 | Amber |
| UTILITIES AND SERVICE INDUSTRIES TRAINING LIMITED | 01741451 | 01/04/2000 | 20/02/2006 | Dissolved |
| VERDAN GROUP LIMITED | 02701425 | 24/03/1992 | 30/09/2011 | Dissolved |
| VERDAN SERVICES LIMITED | 02780366 | 18/01/1993 | 30/09/2011 | Dissolved |
| WALTER LAWRENCE CIVIL & MECHANICAL LIMITED | 00499243 | 28/11/1992 | 14/05/1999 | Dissolved |
| WATER UK | 03539600 | 01/04/2000 | 21/05/2010 | Bronze |
| WATERGRID LIMITED | 04392493 | 15/11/2002 | 27/07/2005 | Dissolved |
| WATERNET LIMITED | 04078871 | 08/11/2002 | 27/07/2005 | Dissolved |
| WE THE CURIOUS (ENTERPRISES) LIMITED | 03867925 | 26/01/2012 | 28/03/2019 | One Red Flag |
| WE THE CURIOUS LIMITED | 03046496 | 26/01/2012 | 28/03/2019 | Silver |