| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Fire (Realisation) Ltd | 01340786 | 29/04/1999 | Dissolved |
| Nationwide Security Group Plc | 03391100 | 29/04/1999 | Dissolved |
| Services (Realisation) Ltd | 01483831 | 29/04/1999 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BRITISH SECURITY INDUSTRY ASSOCIATION LIMITED(THE) | 00896431 | 09/04/2008 | 27/06/2012 | Silver |
| BRUNEL UNIVERSITY ENTERPRISES LIMITED | 04237327 | 17/09/2008 | 25/07/2011 | One Red Flag |
| COOPER SECURITY LIMITED | 01396471 | 17/08/1991 | 31/07/1996 | Dissolved |
| Codepoint Systems Ltd | 02094008 | 22/07/1996 | 26/02/1999 | Dissolved |
| FIRECOM LIMITED | 02215407 | 17/08/1991 | 30/07/1996 | Dissolved |
| HOMELINK TELECOM LIMITED | 01808627 | 17/08/1991 | 31/07/1996 | Dissolved |
| Icon Video Systems Ltd | 04172860 | 05/03/2001 | 01/07/2003 | Dissolved |
| Interlaced Technology Ltd | 02574015 | 09/03/1999 | 11/04/2003 | Dissolved |
| Molynx Ltd | 02027518 | 22/07/1996 | 26/02/1999 | Dissolved |
| RADIOMETRIX LIMITED | 01911097 | 17/08/1991 | 06/01/1992 | Gold |
| SCANTRONIC INTERNATIONAL LIMITED | 01669220 | 01/04/1993 | 31/07/1996 | Dissolved |
| Silvermines Electronic Holdings Ltd | 02547495 | 22/07/1996 | 01/05/1997 | Dissolved |
| Silvermines Equipment & Systems Ltd | 01793761 | 22/07/1996 | 01/05/1997 | Dissolved |
| Transcrypt Europe Ltd | 02783839 | 17/05/1993 | 25/08/1994 | Dissolved |
| VISLINK SECURITY LIMITED | 01100742 | 22/07/1996 | 26/02/1999 | Dissolved |