| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Acer Consultants Ltd | 03049171 | 21/03/2001 | Dissolved |
| Bps (Public Sector) Ltd | 03679842 | 21/03/2001 | Dissolved |
| CREIGIAU CARPENTRY SERVICES LIMITED | 05792090 | 24/04/2006 | Dissolved |
| CREIGIAU CARPENTRY SERVICES LIMITED | 05792090 | 24/04/2006 | Dissolved |
| Celtic Infrastructure Services Ltd | 02832791 | 18/09/1995 | Dissolved |
| Ecostream Ltd | 03116464 | 20/10/1995 | Dissolved |
| Hall & Stinson Limited | 02774186 | 13/03/1996 | Dissolved |
| Hyder Infrastructure Developments Ltd | 03049166 | 21/03/2001 | Dissolved |
| Infralec (1) Ltd | 03116470 | 20/10/1995 | Dissolved |
| Infralec (2) Ltd | 02202889 | 13/03/1996 | Dissolved |
| Infralec (3) Ltd | 02203261 | 13/03/1996 | Dissolved |
| Infralec Ltd | 03679827 | 21/03/2001 | Dissolved |
| Infralec Paypoint Ltd | 03244431 | 21/03/2001 | Dissolved |
| Norwich Systems & Accounting Ltd | 03954856 | 21/03/2001 | Dissolved |
| Nsa Managed Services Ltd | 03954854 | 21/03/2001 | Dissolved |
| South Wales Electricity Trading (Masnach Trydan De Cymru) Li | 02624618 | 11/09/1995 | Dissolved |
| Wales Electricity Contracting (Gwaith Contract Trydan Cymru) | 02202622 | 18/09/1995 | Dissolved |
| Wales Electricity Generating (Cynhyrchu Trydan Cymru) Ltd | 03116484 | 20/10/1995 | Dissolved |
| Wales Electricity Trading (Masnach Trydan Cymru) Limited | 02202875 | 18/09/1995 | Dissolved |
| Wales Power (Pwer Cymru) Ltd | 02222221 | 16/07/1995 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ABERDARE WINDFARM LIMITED | 02906784 | 11/10/1996 | 08/01/1997 | Dissolved |
| CILCIFFETH WINDFARM LIMITED | 02817691 | 08/05/1996 | 08/01/1997 | Dissolved |
| Croeso Systems Development Ltd | 02624610 | 27/06/1992 | 20/06/2002 | Dissolved |
| ESP PIPELINES LIMITED | 03405272 | 02/02/1998 | 27/12/2000 | One Red Flag |
| GELLIGAER WINDFARM LIMITED | 02904366 | 03/03/1994 | 08/01/1997 | Dissolved |
| Glyncorrwg Windfarm Ltd. | 02904350 | 03/03/1994 | 08/01/1997 | Dissolved |
| High Sharpley Windfarm Ltd | 02904800 | 04/03/1994 | 08/01/1997 | Dissolved |
| Hyder Services (Electricity) Ltd | 02624636 | 18/09/1995 | 15/01/1997 | Dissolved |
| Hyder Services (Water) Ltd | 03116475 | 20/10/1995 | 15/01/1997 | Dissolved |
| INFINIS (COE) LIMITED | 02203248 | 18/09/1995 | 20/12/2000 | Dissolved |
| Isopower Ltd | 02904260 | 03/03/1994 | 08/01/1997 | Dissolved |
| JORDANSTON WINDFARM LIMITED | 02904376 | 03/03/1994 | 08/01/1997 | Dissolved |
| Mynydd Uchaf Windfarm Ltd | 02904798 | 04/03/1994 | 08/01/1997 | Dissolved |
| PELICAN POINT POWER LIMITED | 02904282 | 03/03/1994 | 08/01/1997 | N/A |
| SOUTH WALES ELECTRICITY SHARE SCHEME TRUSTEES LIMITED | 02525006 | 13/03/1996 | 19/03/2001 | Silver |
| TRENEWYDD WINDFARM LIMITED | 02832855 | 13/03/1996 | 08/01/1997 | Dissolved |
| Welsh Water Ltd | 03049158 | 21/03/2001 | 20/05/2002 | Dissolved |
| Ysgubor Windfarm Ltd. | 02904401 | 03/03/1994 | 08/01/1997 | Dissolved |