| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Fused Silica Products Ltd | 01694002 | 16/08/1991 | Dissolved |
| M C P - Metelec Ltd | 01594527 | 30/08/1992 | Dissolved |
| M C P Equipment Ltd | 01499953 | 16/08/1991 | Dissolved |
| M C P Holdings Ltd | 01317861 | 30/08/1991 | Dissolved |
| M C P Metals Ltd | 00498543 | 16/08/1991 | Dissolved |
| M C P Technology Ltd | 00656787 | 16/08/1991 | Dissolved |
| M C P-Peko Ltd | 01087932 | 16/08/1991 | Dissolved |
| M.C.P. ELECTRONIC MATERIALS LIMITED | 00296753 | 30/08/1992 | Dissolved |
| McP Tooling Ltd | 03480318 | 12/07/2001 | Dissolved |
| The Rhondda Metal Co Ltd | 00373593 | 16/08/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 5N PLUS UK LIMITED | 00244498 | 16/08/1991 | 30/04/2008 | Dissolved |
| M C P METALS AND CHEMICALS LIMITED | 03903297 | 11/01/2000 | 30/04/2008 | Gold |
| MCP ARAMAYO LIMITED | 04526380 | 14/11/2002 | 30/04/2008 | Silver |
| MTT INVESTMENTS LIMITED | 06347444 | 20/08/2007 | 21/07/2010 | Not Trading |
| MTT TECHNOLOGIES LIMITED | 03903306 | 11/01/2000 | 21/07/2010 | Not Trading |
| WAFER TECHNOLOGY LIMITED | 01829722 | 30/08/1992 | 30/08/1994 | Silver |