| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| FOCUSRITE AUDIO ENGINEERING LIMITED | 02357989 | 17/03/1989 | Silver |
| FOCUSRITE PLC | 09312676 | 14/11/2014 | Silver |
| MARTIN AUDIO LIMITED | 04824341 | 30/12/2019 | Silver |
| Novation Digital Music Systems Ltd | 05160938 | 25/06/2004 | Dissolved |
| OPTIMAL AUDIO GROUP LIMITED | 11341979 | 30/12/2019 | One Red Flag |
| Thames Valley Research Ltd | 02333830 | 19/02/1993 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DISRUPTIVE GROUP HOLDINGS LIMITED | 07575049 | 31/10/2012 | 05/03/2013 | Dissolved |
| THE ASSOCIATION OF PROFESSIONAL RECORDING SERVICES LIMITED | 00502532 | 03/09/2003 | 01/01/2007 | Dissolved |