| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BOOSTFOCAL LIMITED | 04395827 | 01/10/2003 | Bronze |
| BUTTINGTON PROPERTY LIMITED | 12976556 | 27/10/2020 | Bronze |
| COVELSTONE HOLDINGS LTD | 12969139 | 22/10/2020 | One Red Flag |
| COVELSTONE INVESTMENTS LIMITED | 02711977 | 06/05/1992 | One Red Flag |
| COVELSTONE LIMITED | 02263969 | 05/04/1991 | Silver |
| COVELSTONE PROPERTY LIMITED | 06278138 | 04/02/2008 | Silver |
| ENDOGUARD LIMITED | 06438937 | 27/11/2012 | Silver |
| EXOMEDICA LIMITED | 05044775 | 04/03/2004 | One Red Flag |
| KOVELSTON EUROPE LIMITED | 08404489 | 19/02/2013 | Silver |
| Wyvern Training Ltd | 01936258 | 26/05/1998 | Dissolved |
| Wyvern Training Ltd | 01936258 | 05/04/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BOOSTFOCAL LIMITED | 04395827 | 01/10/2003 | 20/03/2023 | Bronze |
| CIPHER SURGICAL LIMITED | SC378738 | 20/05/2021 | 23/11/2021 | One Red Flag |
| COVELSTONE INVESTMENTS LIMITED | 02711977 | 21/05/1998 | 20/03/2023 | One Red Flag |
| COVELSTONE LIMITED | 02263969 | 21/05/1998 | 20/03/2023 | Silver |
| COVELSTONE PROPERTY LIMITED | 06278138 | 04/02/2008 | 20/03/2023 | Silver |
| DATA AND MARKETING ASSOCIATION LIMITED | 02667995 | 03/12/1992 | 19/09/1995 | One Red Flag |
| FENMAN LIMITED | 02173351 | 08/04/2002 | 21/10/2003 | Silver |
| FENMAN LIMITED | 02173351 | 05/04/1991 | 21/10/2003 | Silver |
| Flexagonal Systems Ltd | 05304974 | 25/02/2005 | 14/07/2006 | Dissolved |
| Highbury-Wyvern Ltd | 01496358 | 21/05/1998 | 22/06/1999 | Dissolved |
| Highbury-Wyvern Ltd | 01496358 | 05/04/1991 | 22/06/1999 | Dissolved |
| INFINITE IDEAS LIMITED | 04784500 | 05/12/2003 | 30/10/2008 | Insolvent |
| PULSE DIAGNOSTICS LIMITED | 05663312 | 09/04/2013 | 04/12/2013 | Gold |
| Shalai Ltd | 04489190 | 16/03/2004 | 16/12/2004 | Dissolved |
| TRAINING JOURNAL LIMITED | 04779328 | 23/07/2003 | 21/10/2003 | Silver |