| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| The Girls' Day School Trust (1872) | 02847728 | 01/09/2006 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ABBERLEY HALL LIMITED | 00602279 | 15/12/1991 | 21/06/1996 | Amber |
| C.E. PUBLICATIONS UNLIMITED | 01109913 | 15/03/1993 | 28/01/1999 | Dissolved |
| DRAGON SCHOOL TRUST LIMITED | 00524331 | 01/07/1991 | 10/06/2017 | Silver |
| DUMPTON SCHOOL | 00936623 | 21/05/1993 | 26/01/2004 | Gold |
| DURLSTON COURT SCHOOL TRUST LIMITED | 01091930 | 16/03/1991 | 26/06/1998 | One Red Flag |
| EXETER SCHOOL | 04470478 | 16/03/2005 | 24/06/2015 | Silver |
| GDST (ENTERPRISES) LIMITED | 02971891 | 06/12/2006 | 31/08/2017 | Silver |
| HMC - THE HEADS' CONFERENCE | 00101760 | 20/09/1991 | 31/08/2005 | Gold |
| KNIGHTON HOUSE SCHOOL LIMITED | 00485057 | 20/05/1991 | 17/06/2005 | Bronze |
| NSSO TRUST | 03373524 | 29/09/2005 | 17/03/2008 | Dissolved |
| PORT REGIS SCHOOL LIMITED | 00440436 | 16/03/1992 | 24/05/2013 | Silver |
| THE ASSOCIATION OF GOVERNING BODIES OF INDEPENDENT SCHOOLS | 05217162 | 27/02/2006 | 12/03/2012 | Bronze |
| THE BRYANSTON SOCIETY LIMITED | 03522001 | 04/03/1998 | 10/11/2005 | Silver |
| THE GIRLS' DAY SCHOOL TRUST | 00006400 | 01/09/2006 | 31/08/2017 | Silver |
| WALHAMPTON SCHOOL TRUST LTD | 00871641 | 28/02/1992 | 06/01/1998 | Silver |