| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Angry Troll Music Ltd | 04998472 | 19/12/2003 | Dissolved |
| Blue Room Loudspeakers Ltd | 03212685 | 17/06/1996 | Dissolved |
| Chrome Dome Ltd | 04790873 | 13/06/2003 | Dissolved |
| FIDELIO AUDIO LTD | 07872164 | 06/12/2011 | Dissolved |
| Just A Blip Ltd | 04578881 | 04/11/2002 | Dissolved |
| M E L T 2000 Ltd | 03161879 | 28/02/1996 | Dissolved |
| ROCK SOLID SOUND SYSTEMS LIMITED | 06675590 | 18/08/2008 | Dissolved |
| ROCK SOLID SOUND SYSTEMS LIMITED | 06675590 | 18/08/2008 | Dissolved |
| ROWLES MUSIC LIMITED | 04899087 | 18/04/2004 | One Red Flag |
| UNIT 6 AUDIO LTD | 09579818 | 07/05/2015 | Bronze |
| VIVID AUDIO UK LIMITED | 06853751 | 20/03/2009 | Bronze |
| VIVID AUDIO UK LIMITED | 06853751 | 20/03/2009 | Bronze |
| WORLD CLASS AUDIO LIMITED | 07482343 | 05/01/2011 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Aura Designs Ltd | 02372679 | 25/05/1993 | 14/08/1996 | Dissolved |
| B & W GROUP LTD | 00880499 | 25/06/1991 | 14/08/1996 | Bronze |
| BLAST LOUDSPEAKERS LIMITED | 03339093 | 25/03/1997 | 22/03/2022 | Gold |
| BROWNHILL FARM STUDIOS LIMITED | 03212688 | 17/06/1996 | 20/07/2006 | One Red Flag |
| Bowers,John,Ltd | 01650400 | 16/07/1991 | 01/04/1997 | Dissolved |
| JUNO REACTOR LIMITED | 04814025 | 01/07/2003 | 01/03/2005 | Silver |
| KRONOLOGIK MUSIC LIMITED | 04957490 | 01/12/2003 | 01/10/2007 | Dissolved |
| MADE UP MUSIC LIMITED | 04398944 | 22/03/2002 | 15/05/2013 | One Red Flag |
| PARTRIDGE MANAGEMENT LIMITED | 09158942 | 29/10/2015 | 17/02/2023 | Silver |
| Rock Solid Sounds Incorporated Ltd | 02379605 | 04/05/1990 | 25/07/1997 | Dissolved |
| Steyning Research Establishment Limited | 01669469 | 16/07/1991 | 02/08/1996 | Dissolved |
| VIVID AUDIO LIMITED | 04980884 | 04/12/2003 | 05/01/2022 | Amber |
| VIVID AUDIO LIMITED | 04980884 | 04/12/2003 | 19/05/2016 | Amber |