| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Equiinet Employee Benefit Trust Co Ltd | 03926227 | 25/02/2000 | Dissolved |
| Garsdon Mill Ltd | 03310162 | 21/03/1997 | Dissolved |
| Imigix Ltd | 03579767 | 11/06/1998 | Dissolved |
| LATERAL EDGE LIMITED | 03986098 | 28/04/2000 | Dissolved |
| Pixmedia Ltd | 05030381 | 20/07/2004 | Dissolved |
| Quantum Electronics (Holdings) Ltd | 04013706 | 27/09/2000 | Dissolved |
| Quantum Electronics Manufacturing Ltd | 03412166 | 01/06/1998 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AVAYA ECS LIMITED | 02644861 | 24/10/1997 | 08/09/1998 | Silver |
| CASE COMMUNICATIONS LIMITED | 03913540 | 28/01/2015 | 11/02/2020 | Silver |
| CULLOMA TECHNOLOGIES LIMITED | 07321658 | 03/06/2011 | 10/11/2012 | Amber |
| Chevin Ltd | 02344315 | 31/12/1998 | 03/12/2001 | Dissolved |
| Dica Technologies Ltd | 03511234 | 14/04/1999 | 01/12/2000 | Dissolved |
| JODEN (BUILDERS) LIMITED | 02868022 | 14/11/1993 | 12/10/2004 | Gold |
| NETEVENTS INTERNATIONAL LIMITED | 04854005 | 22/02/2008 | 13/09/2008 | Amber |
| Polaris Telemetry Ltd | 02588475 | 31/07/1995 | 30/05/1997 | Dissolved |
| X-PILOT LIMITED | 04211762 | 09/05/2001 | 13/11/2009 | Dissolved |