| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| MANNING GOTTLIEB OMD | 02477134 | 29/01/2010 | Dissolved |
| OMEL | 03591684 | 29/01/2010 | Dissolved |
| OMNICOM HOLDINGS LIMITED | 04809332 | 17/04/2008 | Dissolved |
| OMNICOM NETWORK HOLDINGS LIMITED | 09290664 | 06/08/2015 | Dissolved |
| TBWA UK | 01482152 | 29/01/2010 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AMV MARKETING SERVICES LIMITED | 12215989 | 19/09/2019 | 04/11/2019 | One Red Flag |
| CARDINIA EUROPE LIMITED | 09290662 | 06/08/2015 | 31/07/2021 | Gold |
| CARDINIA REAL ESTATE UK LIMITED | 09111047 | 01/07/2014 | 31/07/2021 | Bronze |
| OMNICOM APIMA INVESTMENTS LIMITED | 11056434 | 09/11/2017 | 31/07/2021 | Silver |
| OMNICOM DDB HOLDINGS LIMITED | 09290676 | 08/10/2020 | 31/07/2021 | Silver |
| OMNICOM EMEA HOLDINGS LIMITED | 09461219 | 06/08/2015 | 31/07/2021 | Silver |
| OMNICOM EMEA INVESTMENTS LIMITED | 10537408 | 22/12/2016 | 31/07/2021 | Strike Off |
| OMNICOM EUROPE SUBHOLDINGS LIMITED | 10473204 | 10/11/2016 | 31/07/2021 | Silver |
| OMNICOM FINANCE BRAZIL LIMITED | 09913603 | 11/12/2015 | 31/07/2021 | Strike Off |
| OMNICOM FINANCE HOLDINGS PLC | 11432221 | 25/06/2018 | 31/07/2021 | Bronze |
| OMNICOM FINANCE INVESTMENTS LIMITED | 10968648 | 20/10/2017 | 31/07/2021 | Gold |
| OMNICOM FINANCE LIMITED | 01064095 | 09/05/2000 | 31/07/2021 | Gold |
| OMNICOM FINANCIAL SERVICES (HOLDINGS) | 05492015 | 27/06/2005 | 25/07/2012 | Dissolved |
| OMNICOM INTERNATIONAL FINANCE | 05492018 | 17/04/2008 | 31/07/2021 | Gold |
| OMNICOM LATAM HOLDINGS LIMITED | 09913460 | 11/12/2015 | 08/02/2016 | Dissolved |
| OMNICOM LATAM SUBHOLDINGS LIMITED | 09913612 | 01/04/2016 | 31/07/2017 | Dissolved |
| OMNICOM MANAGEMENT EUROPE | 05291536 | 17/04/2008 | 05/07/2021 | Dissolved |
| OMNICOM MANAGEMENT LIMITED | 12236983 | 01/10/2019 | 31/07/2021 | Amber |
| OMNICOM PACIFIC FINANCE LIMITED | 07496844 | 18/01/2011 | 31/07/2021 | Dissolved |
| OMNICOM REGIONAL INVESTMENTS LIMITED | 11026849 | 23/10/2017 | 31/07/2021 | Silver |
| SOUTHWARK FINANCE LIMITED | 12539476 | 30/03/2020 | 31/07/2021 | Gold |
| SOUTHWARK FINANCIAL SERVICES LIMITED | 12540769 | 31/03/2020 | 31/07/2021 | Silver |
| SOUTHWARK INVESTMENT HOLDINGS LIMITED | 12464129 | 14/02/2020 | 31/07/2021 | Amber |
| TBWA EMEA LIMITED | 09290668 | 06/07/2015 | 31/07/2021 | Silver |
| TEQUILA INTERNATIONAL HOLDINGS LIMITED | 03510720 | 04/09/2015 | 31/07/2021 | Amber |
| TEQUILA UK | 02677234 | 04/09/2015 | 31/07/2021 | Not Trading |
| WAG BBDO HOLDINGS LIMITED | 09913919 | 21/12/2015 | 01/02/2016 | Dissolved |