| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| COAL & LAND HOLDINGS LIMITED | 03168881 | 20/01/1997 | Dissolved |
| CWM BARGOED MINING LIMITED | 04459355 | 12/06/2002 | Silver |
| CWMBARGOED ESTATES LIMITED | 10391868 | 18/10/2016 | Dissolved |
| FFYNONAU DUON MINES LIMITED | 01024041 | 02/08/2016 | Bronze |
| GLAMORGAN POWER COMPANY LIMITED | 02870335 | 12/01/1994 | Silver |
| MOUNTAIN TYRES LIMITED | 04459331 | 12/06/2002 | Strike Off |
| PEAKMAN LIMITED | 03175195 | 10/06/1996 | Bronze |
| ROMA ROOFING SUPPLIES LIMITED | 07205195 | 26/03/2010 | One Red Flag |
| STOCKSTEAD LIMITED | 03175183 | 10/06/1996 | Bronze |
| UNITED AGGREGATES LIMITED | 01156860 | 06/10/2008 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| FFOS-Y-FRAN (COMMONERS) LIMITED | 04892620 | 19/11/2003 | 19/05/2009 | Not Trading |
| FFYNONAU DUON MINES LIMITED | 01024041 | 31/07/1992 | 23/08/1999 | Bronze |
| MERTHYR (NOMINEE NO.1) LIMITED | 04261269 | 12/10/2001 | 19/05/2009 | Not Trading |
| MERTHYR (SOUTH WALES) LIMITED | 04261274 | 12/10/2001 | 07/01/2016 | Bronze |
| PEAKMAN LIMITED | 03175195 | 10/06/1996 | 24/06/1999 | Bronze |
| STOCKSTEAD LIMITED | 03175183 | 10/06/1996 | 24/06/1999 | Bronze |
| WESTERNAGENTS LIMITED | 02984232 | 14/07/1995 | 24/03/2003 | Dissolved |