| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Certa (Europe) Ltd | 03393671 | 23/06/1997 | Dissolved |
| Certa (International) Ltd | 03393766 | 23/06/1997 | Dissolved |
| Certa Holdings (Uk) Ltd | 03393773 | 23/06/1997 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BAR MUTUAL MANAGEMENT COMPANY | 02183269 | 31/12/1991 | 07/07/1993 | Dissolved |
| CODAL LIMITED | 01901413 | 01/01/2000 | 14/12/2004 | Dissolved |
| Certa (U K) Ltd | 03393662 | 23/06/1997 | 01/03/2005 | Dissolved |
| H.A.P.M. MANAGEMENT COMPANY LIMITED | 02448927 | 04/12/1991 | 01/08/1998 | Amber |
| SIGNUM SERVICES LTD. | 02044712 | 31/12/1991 | 28/02/2006 | Gold |
| THOMAS MILLER & CO. LIMITED | 01898192 | 01/01/1995 | 01/03/2006 | Silver |
| THOMAS MILLER (UK) HOLDINGS COMPANY LTD | 03766242 | 11/06/1999 | 28/02/2006 | Silver |
| THOMAS MILLER HAMILTON LTD | 01901414 | 31/12/1991 | 31/12/2004 | Dissolved |
| THOMAS MILLER HOLDINGS LTD. | FC021864 | 25/06/1999 | 11/06/2010 | Silver |
| THOMAS MILLER INVESTMENT LTD. | 02187502 | 08/03/1999 | 02/10/2007 | Gold |
| THOMAS MILLER PROFESSIONAL INDEMNITY LIMITED | 02131193 | 31/12/1991 | 07/07/1993 | Bronze |