| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BUCKINGHAM GATE LIMITED | 04121769 | 26/09/2018 | Silver |
| CALEDONIA INVESTMENTS PLC | 00235481 | 04/04/2005 | Gold |
| CALEDONIA US INVESTMENTS LIMITED | 12452849 | 01/12/2020 | Bronze |
| THE BRONZE OAK PROJECT LIMITED | 10072153 | 18/03/2016 | Dissolved |
| THE CAYZER FAMILY ARCHIVE | 06212781 | 29/05/2020 | Silver |
| THE CAYZER TRUST COMPANY LIMITED | 04987694 | 30/04/2009 | Gold |
| WILTSHIRE HISTORIC BUILDINGS TRUST LIMITED (THE) | 00909654 | 03/10/2023 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CLOSE BROTHERS GROUP PLC | 00520241 | 01/01/2008 | 22/11/2012 | Silver |
| HERITAGE OF LONDON TRUST LIMITED(THE) | 01485287 | 16/10/2012 | 31/03/2023 | Gold |
| OCEAN DIAL ASSET MANAGEMENT LIMITED | 05583807 | 07/12/2005 | 22/05/2013 | Silver |
| OCEAN DIAL GROUP LIMITED | 06621171 | 04/07/2008 | 22/05/2013 | Dissolved |
| THE HENDERSON SMALLER COMPANIES INVESTMENT TRUST PLC | 00025526 | 13/05/2011 | 01/10/2021 | Silver |
| THE SLOANE CLUB GROUP LIMITED | 02609321 | 18/12/2001 | 11/02/2014 | Dissolved |
| THE SLOANE CLUB MANAGEMENT LIMITED | 02611185 | 18/12/2001 | 21/03/2017 | Amber |