| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Micto Control Technology Ltd | 01551471 | 12/06/1995 | Dissolved |
| The Pmes Employee Share Co Ltd | 03364115 | 30/11/1998 | Dissolved |
| Ue Dormant Three Ltd | 01899382 | 12/06/1995 | Dissolved |
| Ue Dormant Two Ltd | 01565504 | 12/06/1995 | Dissolved |
| Ultra Nominees Ltd | 02862208 | 09/09/1996 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DATEL DEFENCE LIMITED | 03270251 | 14/04/2000 | 17/05/2006 | Dissolved |
| DF GROUP LIMITED | 03574242 | 14/04/2000 | 17/05/2006 | Bronze |
| FERRANTI AIR SYSTEMS LIMITED | 03061216 | 14/04/2000 | 05/08/2005 | Dissolved |
| GOOCH & HOUSEGO PLC | 00526832 | 02/10/2006 | 31/12/2014 | Gold |
| POWER MAGNETICS AND ELECTRONIC SYSTEMS LIMITED | 02984371 | 30/11/1998 | 17/05/2006 | Dissolved |
| RADAMEC DEFENCE SYSTEMS LIMITED | 01799669 | 30/07/2003 | 05/08/2005 | Dissolved |
| SAFE MARINE LIMITED | SC206278 | 01/07/2003 | 05/08/2005 | Dissolved |
| SML TECHNOLOGIES LIMITED | SC157582 | 01/07/2003 | 05/08/2005 | Dissolved |
| SOCIETY OF BRITISH AEROSPACE COMPANIES (THE) | 00143447 | 13/06/2001 | 13/02/2002 | Dissolved |
| UE DORMANT ONE | 01332065 | 12/06/1995 | 05/08/2005 | Dissolved |
| ULTRA ELECTRONICS HOLDINGS LIMITED | 02830397 | 23/08/1993 | 21/04/2011 | Bronze |
| ULTRA ELECTRONICS LIMITED | 02830644 | 17/08/1993 | 05/08/2005 | Silver |