| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CAMBRIDGE COMPUTER LAB RING | 04491100 | 14/04/2005 | Dissolved |
| EDSAC REPLICA PROJECT | 07824544 | 26/10/2011 | Amber |
| PRZYLEP LIMITED | 03388346 | 16/06/1998 | Dissolved |
| PRZYLEP LIMITED | 03388346 | 18/06/1997 | Dissolved |
| TXTEZ LIMITED | 08283627 | 04/01/2013 | Dissolved |
| Telescopix Ltd | 04121765 | 07/03/2001 | Dissolved |
| Verikeen Ltd | 03070388 | 20/06/1995 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| A T & T Laboratories-Cambridge Ltd | 02025860 | 31/12/1991 | 04/04/2003 | Dissolved |
| ADVENTIQ LIMITED | 05497388 | 30/09/2005 | 13/10/2009 | Silver |
| Adaptive Broadband Ltd | 03552746 | 01/09/1998 | 13/04/2001 | Dissolved |
| CABOT 1 LIMITED | 01708846 | 29/11/1996 | 01/06/1999 | Dissolved |
| CAMBRIDGE BROADBAND NETWORKS LIMITED | 03879840 | 29/12/1999 | 31/03/2006 | Dissolved |
| CAMBRIDGE COMMUNICATION SYSTEMS LIMITED | 07266974 | 22/07/2010 | 03/11/2010 | Insolvent |
| Cambridge 123 Ltd | 04041496 | 07/09/2004 | 15/05/2008 | Dissolved |
| Dormco 2004 Ltd | 03094237 | 23/08/1995 | 30/06/2003 | Dissolved |
| Globespanvirata | 02798338 | 24/03/1993 | 24/07/2000 | Dissolved |
| IQGEO GROUP PLC | 05589712 | 10/11/2005 | 31/12/2015 | Gold |
| REALVNC LIMITED | 04446945 | 16/09/2002 | 15/08/2021 | Bronze |
| UBISENSE LIMITED | 04489603 | 05/06/2003 | 21/04/2006 | One Red Flag |
| VNC GROUP LIMITED | 05822974 | 20/07/2006 | 15/08/2021 | Amber |
| VNC LIMITED | 05820267 | 20/07/2006 | 15/08/2021 | Dissolved |
| XILINX TECHNOLOGY LTD | 04441386 | 16/09/2002 | 02/05/2007 | Gold |