| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Cultural Resource Management Ltd | 01368076 | 17/07/1991 | Dissolved |
| HERITAGE PROJECTS LIMITED | 01732450 | 22/12/1991 | Dissolved |
| Simco No. 60 Limited | 01853011 | 20/02/1995 | Dissolved |
| Simco No. 60 Limited | 01853011 | 20/02/1995 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CONTINUUM (ENTERTAINMENT) LIMITED | 01950293 | 31/07/1991 | 05/08/2000 | Gold |
| COUNCIL FOR BRITISH ARCHAEOLOGY(THE) | 01760254 | 13/07/1992 | 30/09/1995 | Bronze |
| EBORACUM ROMAN CENTRE LIMITED | 02205858 | 29/08/1991 | 21/11/2003 | Not Trading |
| HERITAGE PROJECTS (CANTERBURY) LIMITED | 02022170 | 31/07/1991 | 05/08/2000 | Dissolved |
| HERITAGE PROJECTS (EDINBURGH) LIMITED | SC097137 | 27/12/1988 | 05/08/2000 | Amber |
| JVC RETAIL LIMITED | 03477326 | 04/02/1998 | 30/07/1999 | Bronze |
| MOUNT SCHOOL (YORK) (THE) | 01686186 | 11/06/1994 | 31/12/2001 | One Red Flag |
| NATIONAL COAL MINING MUSEUM FOR ENGLAND TRUST LTD | 01702426 | 24/03/1995 | 24/01/2003 | Silver |
| PAST FORWARD LIMITED | 02585043 | 03/05/1991 | 16/10/1995 | Dissolved |
| THE CONTINUUM GROUP LIMITED | 01969044 | 22/12/1991 | 05/08/2000 | Silver |
| The Barley Hall Trust Ltd | 03420264 | 18/08/1997 | 07/09/2007 | Dissolved |
| VISIT YORK | 02114529 | 19/02/1997 | 16/10/2002 | Dissolved |
| YORK MUSEUMS AND GALLERY TRUST | 04381647 | 30/08/2002 | 09/07/2008 | Bronze |
| YORKSHIRE ARCHAEOLOGICAL AND HISTORICAL SOCIETY | 00038346 | 19/06/1999 | 13/08/2005 | Silver |
| Yat Trading Ltd | 01668907 | 28/09/2001 | 21/11/2003 | Dissolved |