| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| 102.4 WISH FM LIMITED | 03134290 | 27/02/2019 | Dissolved |
| 4 Digital Group Ltd | 06069512 | 05/07/2007 | Dissolved |
| 99.9 RADIO NORWICH LIMITED | 05234082 | 25/02/2019 | Dissolved |
| ANGLIAN BROADCASTING COMPANY (HOLDINGS) LIMITED | 07252533 | 25/02/2019 | Dissolved |
| ANGLIAN RADIO LIMITED | 04248330 | 25/02/2019 | Dissolved |
| BAUER RADIO (ANDOVER) LIMITED | 05805908 | 31/01/2019 | Dissolved |
| BAUER RADIO (BCR) LIMITED | 03360681 | 31/01/2019 | Dissolved |
| BAUER RADIO (NEWBURY) LIMITED | 01158450 | 31/01/2019 | Dissolved |
| BAUER RADIO (SOUTH DEVON) LIMITED | 05364428 | 25/02/2019 | Dissolved |
| BAUER RADIO (SOUTH WEST) LIMITED | 05799853 | 31/01/2019 | Dissolved |
| BAUER RADIO (SOUTHAMPTON) LIMITED | 05740188 | 31/01/2019 | Dissolved |
| BAUER RADIO (TRL) LIMITED | 03515868 | 31/01/2019 | Dissolved |
| Bristol Channel Broadcasting Co Ltd | 02374839 | 01/10/2005 | Dissolved |
| CRB AUDIO GROUP LIMITED | 05176795 | 31/01/2019 | Dissolved |
| CRB AUDIO LIMITED | 05439096 | 25/02/2019 | Dissolved |
| Cool Radio Ltd | 03621922 | 01/10/2005 | Dissolved |
| DELTA RADIO LIMITED | 02642617 | 31/01/2019 | Dissolved |
| DEVON RADIO LTD | 07008884 | 31/01/2019 | Dissolved |
| EAST COAST RADIO (THE BEACH) LIMITED | 03018923 | 25/02/2019 | Dissolved |
| Ford Media Services Ltd. | 02927695 | 11/05/1994 | Dissolved |
| Forth 3 Ltd | SC269254 | 01/10/2005 | Dissolved |
| IVEL FM LIMITED | 04236073 | 31/01/2019 | Dissolved |
| KESTREL FM LIMITED | 03326134 | 31/01/2019 | Dissolved |
| Kerrang Radio Wales Ltd | 04287689 | 29/01/2008 | Dissolved |
| MELLOW 1557 LIMITED | 02475513 | 25/02/2019 | Dissolved |
| MIDWEST RADIO LIMITED | 05100102 | 31/01/2019 | Dissolved |
| NEON FM LTD | 05197156 | 01/10/2005 | Dissolved |
| NORTH NORFOLK RADIO LIMITED | 04318495 | 25/02/2019 | Dissolved |
| RADIOWAVE (BLACKPOOL) LIMITED | 02380110 | 27/02/2019 | Dissolved |
| SCORE DIGITAL LIMITED | SC186240 | 01/10/2005 | Dissolved |
| SCORE INTERACTIVE LIMITED | SC200910 | 01/10/2005 | Dissolved |
| SCOTTISH RADIO NETWORK SALES LIMITED | SC152242 | 01/10/2005 | Dissolved |
| SCOTTISH RADIO NEWS LIMITED | SC181515 | 01/10/2005 | Dissolved |
| SRH RADIO SALES LIMITED | SC071102 | 01/10/2005 | Dissolved |
| SWITCHDIGITAL (B&H) LIMITED | 04404178 | 27/02/2019 | Dissolved |
| SWITCHDIGITAL (S&S) LIMITED | 04342010 | 27/02/2019 | Dissolved |
| Scottish & Irish Radio Sales Ltd | SC181391 | 01/10/2005 | Dissolved |
| Srh Quest Ltd | SC207310 | 01/10/2005 | Dissolved |
| TOWN FM LIMITED | 04235210 | 25/02/2019 | Dissolved |
| VALE FM LIMITED | 02906631 | 31/01/2019 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BAUER DIGITAL RADIO LIMITED | 01875591 | 26/03/2007 | 16/04/2015 | Bronze |
| BAUER GROUP SECRETARIAT LIMITED | 00944753 | 01/10/2001 | 20/07/2005 | Gold |
| BAUER RADIO LIMITED | 01394141 | 13/11/1995 | 01/02/2000 | Amber |
| C. E. DIGITAL LIMITED | 03667131 | 10/02/2005 | 16/03/2006 | Gold |
| Emap Dormant 2 Ltd | 00965168 | 08/02/1995 | 13/11/1995 | Dissolved |
| Heml Ltd | 04343434 | 20/12/2001 | 20/07/2005 | Dissolved |
| North West Live F M Ltd | 02154992 | 07/03/1993 | 18/05/2007 | Dissolved |
| RADIO HALLAM LIMITED | 01115073 | 09/01/1996 | 15/12/1998 | Dissolved |
| RADIO JOINT AUDIENCE RESEARCH LIMITED | 02693823 | 14/03/2007 | 30/06/2023 | Bronze |
| RADIOCENTRE LIMITED | 02669040 | 30/04/2004 | 30/06/2023 | Bronze |
| RED ROSE RADIO LIMITED | 01372170 | 06/09/1994 | 09/01/1996 | Dissolved |
| RIVER RECORDS LIMITED | SC200911 | 01/10/2005 | 08/11/2006 | Amber |
| SOUTH COAST RADIO LIMITED | 05372263 | 01/10/2005 | 30/05/2008 | Dissolved |
| THE COMMERCIAL RADIO COMPANIES ASSOCIATION LIMITED | 01120214 | 12/02/2004 | 15/03/2007 | Dissolved |
| UK DIGITAL RADIO LIMITED | 04104532 | 30/03/2005 | 30/06/2023 | One Red Flag |
| UK RADIOPLAYER LIMITED | 07229400 | 05/03/2014 | 17/07/2023 | One Red Flag |