| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| DRUM OMG LIMITED | 02904456 | 15/07/2024 | Amber |
| EMPYREAN OMG LIMITED | 13240527 | 03/03/2021 | One Red Flag |
| HEARTS & SCIENCE LIMITED | 10445362 | 26/09/2019 | One Red Flag |
| OMNICOM MEDIA GROUP UK LIMITED | 04431736 | 27/05/2008 | One Red Flag |
| OPERA MEDIA LIMITED | 05139491 | 29/06/2004 | Dissolved |
| TRKKN UK LIMITED | 03802728 | 23/09/2019 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| EXHIBEO LIMITED | 08278467 | 20/12/2013 | 30/04/2015 | Dissolved |
| FARNBOROUGH PARK ESTATE LIMITED | 02662858 | 21/11/2019 | 02/10/2024 | Silver |
| FUSE INTERNATIONAL LIMITED | 06803568 | 18/06/2021 | 01/11/2022 | Silver |
| OMD CONNECT LIMITED | 02826942 | 09/07/2002 | 30/07/2012 | Dissolved |
| OMD EMEA LIMITED | 04094368 | 02/07/2002 | 01/03/2017 | Bronze |
| OMD GROUP LIMITED | 02078820 | 22/05/2002 | 04/05/2012 | One Red Flag |
| PHD INTERNATIONAL LIMITED | 03750670 | 26/04/2010 | 21/02/2017 | One Red Flag |
| TALON OUTDOOR LIMITED | 06347960 | 30/01/2015 | 27/03/2017 | Silver |
| THE INSTITUTE OF PRACTITIONERS IN ADVERTISING (PRE-CHARTER) | 00221167 | 20/03/2014 | 23/03/2017 | Dissolved |
| TRKKN UK LIMITED | 03802728 | 08/05/2009 | 28/02/2017 | Silver |