| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ENIGMA AUDIO GROUP LIMITED | 11218230 | 21/02/2018 | One Red Flag |
| OPUS AUDIO TECHNOLOGIES LTD | 05634373 | 24/11/2005 | Dissolved |
| Opus Audio Developments Ltd | 03252221 | 19/09/1996 | Dissolved |
| Opussound Ltd | 02589319 | 27/03/1991 | Dissolved |
| QUANTUM AUDIO LIMITED | 11285800 | 03/04/2018 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Opus Audio Developments Ltd | 03252221 | 19/09/1996 | 04/10/1996 | Dissolved |