| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BOYER INVESTMENTS LIMITED | 06032199 | 18/12/2006 | Bronze |
| H H Martyn Ltd | 02667820 | 19/02/1992 | Dissolved |
| PRIME ESTATES LIMITED | 01823607 | 26/09/2003 | Silver |
| PRIME ESTATES SERVICES LIMITED | 00502714 | 26/09/2003 | Bronze |
| The Matrix Consultancy Ltd | 02382807 | 23/01/1991 | Dissolved |
| Towing Technology International Ltd | 02779219 | 13/01/1993 | Dissolved |
| Trident Partners Ltd | 02572340 | 08/01/1992 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALTRIKA LIMITED | SC353149 | 07/01/2009 | 19/12/2011 | Dissolved |
| BENGALE LIMITED | 02130049 | 09/12/2011 | 05/03/2014 | Not Trading |
| BSG WIRELESS SOLUTIONS LTD | 04372063 | 01/01/2004 | 07/09/2005 | Dissolved |
| ELCOGEN GROUP PLC | 13290541 | 26/05/2021 | 20/12/2022 | Silver |
| FORUM FOR THE FUTURE | 02959712 | 26/04/2006 | 25/04/2013 | Gold |
| ILIKA PLC | 07187804 | 12/03/2010 | 30/09/2015 | Amber |
| ILIKA TECHNOLOGIES LTD | 05048795 | 29/06/2004 | 30/09/2015 | Amber |
| IQUR LIMITED | 04665665 | 15/07/2004 | 05/09/2014 | Silver |
| LAIRD LIMITED | 00055513 | 07/05/2013 | 29/04/2016 | Silver |
| MITIE GROUP PLC | SC019230 | 01/06/2013 | 31/08/2018 | Silver |
| RICARDO PLC | 00222915 | 05/09/2019 | 31/07/2024 | Silver |
| SOUTHAMPTON ASSET MANAGEMENT LIMITED | 04367489 | 10/06/2004 | 04/07/2013 | Bronze |
| THE GODOLPHIN AND LATYMER SCHOOL FOUNDATION | 03598439 | 22/06/2004 | 24/06/2014 | Silver |
| TT ELECTRONICS PLC | 00087249 | 10/06/2016 | 10/05/2024 | Silver |
| Trident Components Group Ltd | 03152066 | 06/03/1996 | 07/04/1997 | Dissolved |
| Trident Components Group Ltd | 03152066 | 06/03/1996 | 20/04/2004 | Dissolved |
| Trident Components Trustees Ltd | 04479549 | 30/08/2002 | 20/04/2004 | Dissolved |