| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BLOXHAM MILL LIMITED | 03897245 | 03/06/2000 | Silver |
| DERWENT HOUSE FREEHOLD LIMITED | 08295060 | 15/11/2012 | Not Trading |
| DERWENT HOUSE INVESTMENT LLP | OC380167 | 13/11/2012 | Silver |
| Eighty-Three Queen's Gate Ltd | 02494613 | 20/04/1991 | Dissolved |
| SMARTOLOGY LIMITED | 04597890 | 09/04/2014 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 83-85 QUEEN'S GATE LIMITED | 05912012 | 17/06/2010 | 31/03/2016 | Gold |
| BLOXHAM MILL LIMITED | 03897245 | 03/06/2000 | 30/03/2005 | Silver |
| DERWENT BELGRAVIA LIMITED | 07599117 | 11/04/2011 | 31/12/2019 | Bronze |
| M9 (IT) LIMITED | 04343900 | 04/02/2002 | 01/10/2008 | Dissolved |
| M9 (IT) LIMITED | 04343900 | 04/02/2002 | 03/11/2021 | Dissolved |
| M9 HOLDINGS (IT) LIMITED | 07961428 | 11/06/2013 | 03/11/2021 | Dissolved |
| M9 SOFTWARE LIMITED | 08099349 | 07/01/2013 | 19/04/2021 | Dissolved |