| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Acelimit Ltd | 02217502 | 16/11/1991 | Dissolved |
| Ledger Montgomery Ltd | 03175089 | 19/03/1996 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ACADEMY OF ST MARTIN IN THE FIELDS | 01808488 | 10/06/1991 | 20/06/2000 | Silver |
| ACTION MEDICAL RESEARCH | 00549089 | 14/03/1991 | 04/03/1992 | Silver |
| ANGUS MONTGOMERY LIMITED | 00576440 | 31/01/1991 | 14/12/2008 | Gold |
| Aspade Ltd. | 02843557 | 09/08/1993 | 14/12/2008 | Dissolved |
| Building Conservation Information Ltd | 01442943 | 31/10/1991 | 15/07/1991 | Dissolved |
| EXHIBITION CONSULTANTS LIMITED | 00571453 | 31/01/1991 | 14/12/2008 | Silver |
| Ecl (Exhibition Agencies) Ltd | 00987177 | 31/01/1991 | 14/12/2008 | Dissolved |
| Exhibition Audience Audits Ltd | 00990913 | 10/11/1991 | 29/12/1994 | Dissolved |
| Exhibition Consultants & Management Services (Scotland) Ltd | SC085402 | 07/03/1989 | 14/12/2008 | Dissolved |
| INTERBUILD EXHIBITIONS LIMITED | 01090170 | 31/01/1992 | 14/12/2008 | Dissolved |
| Interbuild Publications Ltd | 00524946 | 31/01/1991 | 14/12/2008 | Dissolved |
| MONTGOMERY EXHIBITIONS LIMITED | 01242502 | 31/01/1992 | 22/09/2005 | Amber |
| MONTGOMERY GROUP LIMITED | 00529362 | 31/01/1991 | 05/06/1997 | Silver |
| MONTGOMERY LIBYA LIMITED | 01433033 | 31/01/1992 | 14/12/2008 | Dissolved |
| MONTGOMERY SPECIALISED EXHIBITIONS LIMITED | 00987671 | 31/01/1991 | 14/12/2008 | Silver |
| Montbuild Ltd | 00990806 | 31/01/1992 | 14/12/2008 | Dissolved |
| OTSA LIMITED | 01090321 | 31/01/1991 | 15/09/2005 | Silver |
| OVERSEAS EXHIBITION SERVICES LIMITED | 00677971 | 31/01/1992 | 10/12/1997 | Dissolved |
| SCOTTISH INDUSTRIAL & TRADE EXHIBITIONS LIMITED | SC052538 | 07/03/1989 | 14/12/2001 | Dissolved |
| THAMES FESTIVAL TRUST | 03577462 | 04/04/2002 | 13/07/2006 | Gold |
| THE MONTGOMERY GROUP LIMITED | 00987381 | 31/01/1991 | 14/12/2008 | Dissolved |
| THE MONTGOMERY NETWORK LIMITED | 03264771 | 17/10/1996 | 22/01/2001 | Not Trading |
| UPKEEP : THE TRUST FOR TRAINING AND EDUCATION IN BUILDING MAINTENANCE | 01409696 | 31/10/1991 | 17/02/1993 | Dissolved |