| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CAMBRIDGE INDUSTRIAL ENTERPRISES LIMITED | 05232918 | 16/09/2004 | Dissolved |
| CAMBRIDGE INDUSTRIAL ENTERPRISES LIMITED | 12102816 | 15/07/2019 | Dissolved |
| CIEL ART LIMITED | 08064842 | 11/05/2012 | Dissolved |
| Ciel Technologies Ltd | 06037789 | 28/12/2006 | Dissolved |
| RUFUS RESEARCH LIMITED | 13271071 | 16/03/2021 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| APOLITICAL GROUP LIMITED | 09812036 | 01/03/2020 | 25/08/2022 | Amber |
| BORAX EUROPE LIMITED | 00036374 | 01/02/2006 | 31/07/2006 | Bronze |
| CHEESECAKE ENERGY LIMITED | 10317962 | 13/09/2021 | 16/11/2023 | Amber |
| COSWORTH GROUP HOLDINGS LIMITED | 06442393 | 19/12/2013 | 28/01/2019 | Silver |
| GKN HYBRID POWER LIMITED | 06005208 | 23/04/2010 | 21/06/2010 | Two Red Flags |
| LUZENAC MICRO MILLING LIMITED | 00929894 | 15/05/2006 | 20/11/2006 | Dissolved |
| MIND FOUNDRY LIMITED | 09882159 | 10/05/2016 | 30/04/2017 | Amber |
| OSLER DIAGNOSTICS LIMITED | 10001467 | 03/01/2019 | 20/07/2020 | Amber |
| OX MOUNTAIN LIMITED | 09518762 | 31/03/2015 | 28/08/2020 | Gold |
| OXFORD SEMANTIC TECHNOLOGIES LIMITED | 10531895 | 19/12/2016 | 16/07/2024 | Bronze |
| RIO TINTO MINERALS LIMITED | 01523652 | 26/01/2006 | 31/07/2006 | Dissolved |
| RIVER LEARNING TRUST | 07966500 | 10/12/2013 | 31/07/2020 | Silver |
| SPORTED TRADING LIMITED | 08623400 | 24/07/2013 | 30/11/2013 | Bronze |
| THE WILLIAMS F1 TEAM FOUNDATION | 07136191 | 26/01/2010 | 31/03/2012 | Not Trading |
| WGP TRUSTEES LIMITED | 07501975 | 21/01/2011 | 31/03/2012 | Not Trading |
| WILLIAMS GRAND PRIX ENGINEERING LIMITED | 01297497 | 18/09/2008 | 31/03/2012 | Amber |
| WILLIAMS GRAND PRIX HOLDINGS PLC | 07475805 | 21/12/2010 | 31/03/2012 | Insolvent |