| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ALUSID LIMITED | 08121977 | 16/09/2015 | One Red Flag |
| B1 MEDICAL LIMITED | SC280652 | 14/07/2006 | Dissolved |
| CAMBRIDGE RAMAN IMAGING LTD | 11256678 | 18/01/2023 | One Red Flag |
| CAMGRAPHIC LTD. | 11651312 | 03/02/2023 | Amber |
| FRONTIER IP FOUNDER PARTNERS LIMITED | SC360333 | 21/07/2009 | Dissolved |
| FRONTIER IP GP DUNDEE LIMITED | SC360336 | 01/04/2014 | Dissolved |
| FRONTIER IP GP RG LIMITED | SC360329 | 03/04/2014 | Dissolved |
| FRONTIER IP GROUP PLC | 06262177 | 13/05/2009 | Silver |
| FRONTIER IP INVESTMENTS LIMITED | SC360330 | 21/07/2009 | Dissolved |
| FRONTIER IP LIMITED | SC335992 | 10/01/2008 | Silver |
| FRONTIER IP MANAGEMENT LIMITED | SC465298 | 07/02/2014 | One Red Flag |
| GRAPHENERGYTECH LTD | 14406810 | 10/10/2022 | Bronze |
| GULLIVERS WHARF FREEHOLD LIMITED | 03172147 | 17/04/2001 | Bronze |
| INTELLIGENT FLOW SOLUTIONS LTD | SC382981 | 27/03/2012 | Dissolved |
| Investhink Ltd | 03761943 | 28/04/1999 | Dissolved |
| Madge Ltd | 04682844 | 25/08/2004 | Dissolved |
| Micap Plc | 04000124 | 11/09/2000 | Dissolved |
| PHOTO THERAPEUTICS GROUP LIMITED | 04197580 | 20/05/2004 | Dissolved |
| PULSIV LIMITED | 08772178 | 12/11/2013 | Amber |
| PULSIV SOLAR LIMITED | 13302943 | 30/03/2021 | Not Trading |
| Power X Ltd | 02949813 | 19/08/1999 | Dissolved |
| QUPIC LIMITED | 13808413 | 20/12/2021 | Not Trading |
| Weather Index Ltd | 03811378 | 28/06/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ARC INTERNATIONAL CAMBRIDGE LIMITED | 03901841 | 10/05/2004 | 14/06/2007 | Dissolved |
| CAMBRIDGE SENSOR INNOVATION LIMITED | 09449170 | 16/08/2017 | 10/05/2018 | Silver |
| CATALYST MEDIA INVESTMENTS LIMITED | 04182869 | 20/03/2001 | 01/07/2002 | Dissolved |
| CELERUM LIMITED | SC464904 | 07/03/2014 | 31/10/2021 | One Red Flag |
| COMPANY HEALTH GROUP PLC | 04021148 | 31/12/2003 | 25/04/2005 | Dissolved |
| Catalyst Media Management Ltd | 04119739 | 01/04/2001 | 01/07/2002 | Dissolved |
| HATTON HOUSE DISTRIBUTION LIMITED | SC348857 | 22/12/2009 | 15/06/2018 | Dissolved |
| MCLAREN SOFTWARE GROUP LIMITED | SC249930 | 01/07/2003 | 31/12/2008 | Not Trading |
| MICAP INGREDIENTS LIMITED | 03608447 | 01/07/2000 | 13/02/2001 | Dissolved |
| Managed Information Group Ltd | 05053011 | 19/12/2005 | 02/06/2006 | Dissolved |
| NANDI PROTEINS LIMITED | SC213462 | 19/03/2004 | 11/05/2006 | Amber |
| PLANSEA LIMITED | SC452467 | 07/03/2014 | 07/03/2014 | Dissolved |
| POREXPERT LIMITED | 08202603 | 30/11/2012 | 19/11/2024 | Bronze |
| REABOLD RESOURCES PLC | 03542727 | 09/05/2002 | 31/10/2010 | Silver |
| SIGMA CAPITAL GROUP LIMITED | 03942129 | 09/03/2000 | 27/03/2000 | Gold |
| SIGMA CAPITAL GROUP LIMITED | 03942129 | 09/03/2000 | 20/06/2008 | Gold |
| SIGMA ENGLISH GP NO.2 LIMITED | 05084416 | 25/03/2004 | 12/11/2008 | Dissolved |
| SIGMA GP NO 3 LIMITED | SC320072 | 06/06/2007 | 12/11/2008 | Dissolved |
| SIGMA INNOVATION PARTNERS LIMITED | SC227778 | 08/02/2002 | 12/11/2008 | Dissolved |
| SIGMA SCOTTISH GP NO.2 LIMITED | SC265488 | 25/03/2004 | 12/11/2008 | Dissolved |
| SIGMA TECHNOLOGY FOUNDER PARTNERS LIMITED | 04080037 | 26/03/2001 | 12/11/2008 | Silver |
| SIGMA TECHNOLOGY GROUP LIMITED | 05679032 | 19/06/2006 | 12/11/2008 | Dissolved |
| SIGMA TECHNOLOGY INVESTMENTS LIMITED | 03970359 | 06/04/2000 | 12/11/2008 | One Red Flag |
| SIGMA TECHNOLOGY MANAGEMENT LIMITED | 03289432 | 09/01/1997 | 12/11/2008 | Silver |
| SIGMA TECHNOLOGY VENTURE PARTNERS LIMITED | 04080034 | 19/03/2001 | 12/11/2008 | Dissolved |
| STRATEGIC INVESTMENT MANAGEMENT LIMITED | SC220417 | 26/06/2001 | 12/11/2008 | Dissolved |
| Transoft Software Ltd | 03203472 | 07/08/1997 | 30/04/2002 | Dissolved |
| VIANET LIMITED | SC138846 | 20/05/1997 | 06/03/2000 | Amber |
| Vividas Group Plc | 04765486 | 21/08/2003 | 04/12/2007 | Dissolved |
| Zorba Products Plc | 03446143 | 12/07/2000 | 13/02/2001 | Dissolved |