| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Association of Market Survey Organisations Ltd | 00832568 | 03/12/1996 | Dissolved |
| IPSOS FOUNDATION | 09568658 | 28/05/2015 | Silver |
| IPSOS MORI NORTH LIMITED | 03879606 | 10/10/2006 | Dissolved |
| MORI FINANCIAL SERVICES LIMITED | 01986177 | 02/01/1997 | Dissolved |
| MORI INTERNATIONAL LIMITED | 03092994 | 11/09/1995 | Dissolved |
| Mori France Ltd | 02485079 | 26/03/1992 | Dissolved |
| ON-LINE TELEPHONE SERVICES LIMITED | 03141075 | 25/01/2006 | Dissolved |
| ON-LINE TELEPHONE SURVEYS LIMITED | 02276512 | 25/02/2006 | Dissolved |
| Socioconsult Ltd | 01969003 | 25/01/2006 | Dissolved |
| The Guillemont Trust | 04307247 | 22/07/2002 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| FIELD & TAB LIMITED | 01958269 | 22/06/1994 | 15/12/1995 | Dissolved |
| IPSOS (MARKET RESEARCH) LTD | 00948470 | 25/05/1991 | 30/06/2023 | Silver |
| IPSOS EMEA HOLDINGS LTD | 04997072 | 18/02/2004 | 30/06/2023 | Bronze |
| IPSOS MORI (IRELAND) LIMITED | NI020620 | 20/02/2002 | 01/04/2015 | Dissolved |
| MARKET DYNAMICS LIMITED | 03201038 | 01/10/2002 | 05/11/2013 | Dissolved |
| MEDIATRACK RESEARCH LTD | 02683017 | 21/02/1992 | 31/01/1994 | Dissolved |
| MORI LIMITED | 03904207 | 03/03/2000 | 30/06/2023 | Bronze |
| NUMBERS SERVICES LIMITED | 01986188 | 01/03/1995 | 04/04/1997 | Dissolved |
| PR TEST LIMITED | 02998981 | 25/01/2006 | 05/11/2013 | Dissolved |
| SIMPSON CARPENTER LIMITED | 03533706 | 01/06/1998 | 10/10/2006 | Gold |
| THE MARKET RESEARCH QUALITY STANDARDS ASSOCIATION | 03000427 | 12/12/1994 | 09/10/2001 | Dissolved |
| The British Market Research Association Ltd | 03419017 | 01/09/1998 | 12/12/2000 | Dissolved |