| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Advantage Ddb Ltd | SC131083 | 07/11/2001 | Dissolved |
| Billco Ltd | 01595986 | 20/06/1991 | Dissolved |
| Bmp Interaction Ltd | 02069921 | 20/09/1999 | Dissolved |
| HISTORY OF ADVERTISING TRUST(THE) | 01354445 | 01/01/2016 | Silver |
| SHIRLEY WATSON CONSULTANCY LIMITED | 09265996 | 15/10/2014 | Silver |
| Solutions in Media Ltd | 01478937 | 21/05/2001 | Dissolved |
| THE COMMUNITY CHANNEL | 03655220 | 09/09/2014 | Dissolved |
| Tribal D D B London Ltd | 02677073 | 01/12/2000 | Dissolved |
| Tribal Ddb Europe Ltd | 04003942 | 01/12/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ADELPHI-MAPI PARTNERSHIP LIMITED | SC129493 | 07/11/2001 | 01/12/2008 | Dissolved |
| DDB UK LIMITED | 00933578 | 20/06/1992 | 31/08/2014 | Bronze |
| Jones Mason Barton Antenen Ltd | 01642875 | 02/03/1999 | 14/02/2002 | Dissolved |
| MEDIA TRUST TRADING LIMITED | 10942812 | 01/09/2017 | 23/05/2018 | Not Trading |
| NEW COMMERCIAL ARTS GROUP LIMITED | 12455030 | 11/02/2020 | 15/05/2020 | Silver |
| NEW COMMERCIAL ARTS LONDON LIMITED | 12482753 | 25/02/2020 | 15/05/2020 | Silver |
| OMD CONNECT LIMITED | 02826942 | 12/12/2000 | 09/07/2002 | Dissolved |
| OMD EMEA LIMITED | 04094368 | 21/05/2001 | 02/07/2002 | Bronze |
| OMD GROUP LIMITED | 02078820 | 20/06/1992 | 22/05/2002 | One Red Flag |
| THE MEDIA TRUST | 02895790 | 09/09/2014 | 23/05/2018 | Gold |
| VIRION INTERACTIVE LIMITED | 06296542 | 16/09/2008 | 28/08/2009 | Dissolved |