| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Cambrensys Ltd | 02962940 | 09/11/1994 | Dissolved |
| Cambrian Environmental Services Ltd | 02656986 | 24/10/1992 | Dissolved |
| Engineering & Environment Ltd | 02366586 | 21/07/1992 | Dissolved |
| Intellect Expert Systems (Uk) Ltd | 02917835 | 26/05/1994 | Dissolved |
| Tinadale Ltd | 02965507 | 09/11/1994 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ARCADIS CONSULTING GROUP LIMITED | 02115472 | 21/02/1993 | 15/09/2000 | One Red Flag |
| BUSINESS IN THE COMMUNITY | 01619253 | 07/12/1993 | 17/10/2000 | Bronze |
| DWR CYMRU CYFYNGEDIG | 02366777 | 31/03/1992 | 18/09/2000 | Amber |
| Dawnleigh Ltd | 02661354 | 21/07/1992 | 29/01/1997 | Dissolved |
| HYDER INVESTMENTS LIMITED | 02898070 | 26/05/1994 | 21/09/2000 | Dissolved |
| HYDER LIMITED | 02366776 | 31/03/1992 | 15/09/2000 | Dissolved |
| Hamdden Ltd | 02705531 | 21/07/1992 | 01/04/1994 | Dissolved |
| Hyder Investments Overseas Holdings Ltd | 02958248 | 09/11/1994 | 15/09/2000 | Dissolved |
| Hyder Overseas Investments Ltd | 02906578 | 26/05/1994 | 21/09/2000 | Dissolved |
| Hyder Utilities (Holdings) Ltd | 03405267 | 19/05/1998 | 15/09/2000 | Dissolved |
| INSTITUTE OF WATER | 00539193 | 07/05/1992 | 21/04/1994 | Gold |
| Karma Innovations Ltd | 03804369 | 21/01/2005 | 30/03/2007 | Dissolved |
| METERMIMIC HOLDINGS LIMITED | 06224729 | 22/11/2011 | 31/01/2014 | Dissolved |
| METERMIMIC LIMITED | 03769854 | 30/07/2010 | 02/05/2011 | Dissolved |
| NATIONAL GRID ELECTRICITY DISTRIBUTION (SOUTH WALES) PLC | 02366985 | 30/01/1996 | 15/09/2000 | Bronze |
| NOVERA ENERGY GENERATION NO. 2 LIMITED | 02366593 | 01/01/1995 | 15/09/2000 | Amber |
| Pen Y Fan Properties (No. 2) Ltd | 02421859 | 21/07/1992 | 29/01/1997 | Dissolved |
| Queen Anne's Gate Holdings Limited | 02176278 | 31/12/1991 | 21/07/1994 | Dissolved |
| Queen Anne's Gate Investments Limited | 02176274 | 31/12/1991 | 21/07/1994 | Dissolved |
| Queen Anne's Gate Nominees Limited | 02176272 | 31/12/1991 | 21/07/1994 | Dissolved |
| Queen Anne's Gate Property Company Limited | 02176271 | 31/12/1991 | 21/07/1994 | Dissolved |
| The Water Services Association of England & Wales | 01710723 | 01/04/1993 | 15/01/1996 | Dissolved |
| UK HIGHWAYS M40 (HOLDINGS) LIMITED | 02939644 | 27/03/1995 | 01/07/1996 | Silver |
| UTILITIES AND SERVICE INDUSTRIES TRAINING LIMITED | 01741451 | 01/04/1993 | 09/06/1999 | Dissolved |
| WELSH WATER INTERNATIONAL LIMITED | 02366589 | 01/01/1995 | 02/04/1997 | Dissolved |
| WELSH WATER UTILITIES FINANCE PLC | 02869784 | 31/01/1994 | 15/09/2000 | Dissolved |
| WW SHARE SCHEMES TRUSTEES LIMITED | 02388914 | 31/03/1992 | 15/09/2000 | Dissolved |
| Wales European Centre Ltd | 03549892 | 28/02/2001 | 25/06/2001 | Dissolved |