| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| IPG STUDIOS UK LIMITED | 06519082 | 27/09/2022 | Silver |
| MCCANN-ERICKSON ADVERTISING LIMITED | 01372305 | 27/05/2020 | One Red Flag |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ART COMPANY (CREATIVE SERVICES) LIMITED(THE) | 01931739 | 30/11/2015 | 03/04/2020 | Dissolved |
| BEAUMONT-BENNETT LIMITED | 02186817 | 20/11/2015 | 03/04/2020 | Dissolved |
| BEYOND INTERACTIVE LIMITED | 03690647 | 26/08/2019 | 03/04/2020 | Dissolved |
| BLUE BARRACUDA MARKETING LIMITED | 04342237 | 15/04/2011 | 09/01/2014 | Dissolved |
| COGENT ANALYTICS LTD | 06568048 | 30/06/2008 | 12/01/2009 | Dissolved |
| COLLINSON DIGITAL (HOLDINGS) LIMITED | 06309858 | 11/07/2007 | 12/01/2009 | Dissolved |
| CREATIVE STRATEGY LIMITED | 02282899 | 20/11/2015 | 03/04/2020 | Dissolved |
| FCB EUROPE LIMITED | 03007253 | 16/04/2012 | 09/01/2014 | Gold |
| FCB INFERNO LIMITED | 02586852 | 24/02/2009 | 19/12/2013 | Amber |
| FINCHDEAN LIMITED | 04035920 | 12/09/2005 | 30/04/2007 | Dissolved |
| GLOBAL MARKETING SOFTWARE LIMITED | 05989119 | 13/06/2008 | 12/01/2009 | Dissolved |
| GREY ADVERTISING LIMITED | 00539916 | 20/04/2015 | 03/04/2020 | Gold |
| GREY DIRECT LIMITED | 01908998 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY EUROPE LIMITED | 02093893 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY GB LIMITED | 02475406 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY GROUP SERVICES LIMITED | 01819631 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY INTERACTIVE EUROPE LIMITED | 03837121 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY LIMITED | 04125873 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY LONDON LIMITED | 02499268 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY MIDLANDS LIMITED | 02499827 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY NETWORK LIMITED | 02126910 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY NORTH LIMITED | 01819542 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY NT LIMITED | 02098789 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY PTK ADVERTISING LIMITED | 01259894 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY TECHNOLOGY SERVICES LIMITED | 00856829 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREY WORLDWIDE LIMITED | 00932147 | 20/11/2015 | 03/04/2020 | Dissolved |
| GREYCOM LIMITED | 01864844 | 20/11/2015 | 03/04/2020 | Dissolved |
| HILTON ADVERTISING LIMITED | 00756971 | 20/11/2015 | 03/04/2020 | Dissolved |
| ICLP WORLDWIDE LTD | 06297514 | 29/06/2007 | 12/01/2009 | One Red Flag |
| INTERNATIONAL CUSTOMER LOYALTY PROGRAMMES (HOLDINGS) LIMITED | 06311788 | 13/07/2007 | 12/01/2009 | Silver |
| INTERNATIONAL CUSTOMER LOYALTY PROGRAMMES (OVERSEAS HOLDINGS) LIMITED | 06312662 | 13/07/2007 | 12/01/2009 | One Red Flag |
| MELLORS REAY & PARTNERS LIMITED | 02548639 | 20/11/2015 | 03/04/2020 | Dissolved |
| MIND OVER MEDIA LIMITED | 02300912 | 20/11/2015 | 03/04/2020 | Dissolved |
| MODULE COMMUNICATIONS GROUP LIMITED | 02252717 | 20/11/2015 | 03/04/2020 | Dissolved |
| MOONRAID LIMITED | 00702897 | 20/11/2015 | 03/04/2020 | Dissolved |
| PARTNERSHIP MARKETING (HOLDINGS) LIMITED | 06309857 | 11/07/2007 | 12/01/2009 | Dissolved |
| PARTNERSHIP MARKETING (OVERSEAS HOLDINGS) LIMITED | 06312660 | 13/07/2007 | 12/01/2009 | Dissolved |
| PARTNERSHIP MARKETING (UK HOLDINGS) LIMITED | 06311675 | 13/07/2007 | 12/01/2009 | Dissolved |
| PARTNERSHIP MARKETING AGENCY LIMITED | 05732839 | 13/06/2008 | 12/01/2009 | One Red Flag |
| RWG LIMITED | 00722208 | 20/11/2015 | 03/04/2020 | Dissolved |
| TELEBINGO LIMITED | 02104534 | 20/11/2015 | 03/04/2020 | Dissolved |
| THE BRAND FUTURES CONSULTANCY LIMITED | 02111818 | 20/11/2015 | 03/04/2020 | Dissolved |
| THE COLLINSON GROUP (IT) LIMITED | 06309843 | 11/07/2007 | 12/01/2009 | Dissolved |
| TWW GROUP LIMITED | 02481989 | 20/11/2015 | 03/04/2020 | Amber |
| VIVID LIME LTD | 03924823 | 13/06/2008 | 12/01/2009 | Silver |
| WILDFIRE WORD OF MOUTH LIMITED | 04571593 | 06/07/2015 | 03/04/2020 | Dissolved |