| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ADVERTISING LOYALTY UK LTD | 07224879 | 27/09/2010 | Dissolved |
| AGENCY BUSINESS LIMITED | 05824012 | 22/05/2006 | Gold |
| EIGHT&FOUR GROUP LIMITED | 05433076 | 26/07/2022 | Gold |
| Perceptive Services Ltd | 03226775 | 13/08/1996 | Dissolved |
| Strategic Data Management Ltd | 02200302 | 12/10/1998 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AI LONDON LIMITED | 03535299 | 26/03/1998 | 06/04/1999 | Dissolved |
| AI LONDON LIMITED | 03535299 | 26/03/1998 | 06/04/1999 | Dissolved |
| ALL RESPONSE MEDIA LIMITED | 03056950 | 19/05/1995 | 31/12/2005 | Silver |
| Blau Direct International Ltd | 03015888 | 30/09/2002 | 05/01/2006 | Dissolved |
| Brann Holdings Ltd | 02860017 | 30/09/2002 | 05/01/2006 | Dissolved |
| CULTURE MAP LIMITED | 05663619 | 12/01/2008 | 27/09/2010 | Dissolved |
| CULTURE MAP LIMITED | 05663619 | 20/03/2007 | 27/09/2010 | Dissolved |
| Cognisance Ltd | 03594996 | 11/04/2003 | 05/01/2006 | Dissolved |
| E H S Brann Leeds Ltd | 03539275 | 07/04/1998 | 31/12/2005 | Dissolved |
| HAVAS EHS DISCOVERY LIMITED | 00908743 | 30/09/2002 | 05/01/2006 | Bronze |
| HAVAS HELIA LIMITED | 02548077 | 12/10/1992 | 31/12/2005 | One Red Flag |
| JEFFRIES PARSONS MYERS HARVEY LIMITED | 04546731 | 28/04/2008 | 30/03/2013 | Dissolved |
| NABS | 03588945 | 01/09/2016 | 10/07/2019 | Amber |
| Newbury Direct Marketing Services Ltd | 02676149 | 30/09/2002 | 05/01/2006 | Dissolved |
| Real Time Studios Ltd | 02249027 | 15/12/2003 | 31/12/2005 | Dissolved |
| S.J.A. Marketing Services Ltd | 01933818 | 30/09/2002 | 05/01/2006 | Dissolved |
| Zinc Ltd | 03618091 | 02/11/1998 | 09/05/2000 | Dissolved |