| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Collier,C,& Son Ltd | 00374274 | 09/12/1999 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 21 SEYMOUR STREET LIMITED | 02953826 | 28/10/2003 | 05/04/2016 | Bronze |
| BERKELEY STREET NOMINEES LIMITED | 06073998 | 08/02/2007 | 31/12/2014 | Not Trading |
| BRITISH PROPERTY FEDERATION | 00778293 | 26/02/1998 | 11/12/1998 | Silver |
| CANTIUM ESTATES LIMITED | 02902074 | 01/05/1996 | 06/09/2000 | Dissolved |
| CUSHMAN & WAKEFIELD DEBENHAM TIE LEUNG LIMITED | 02757768 | 18/02/1993 | 06/09/2000 | Bronze |
| CUSHMAN & WAKEFIELD INTERNATIONAL LIMITED | 02401046 | 02/11/1991 | 06/09/2000 | One Red Flag |
| D T & C LIMITED | 02047066 | 02/11/1991 | 06/09/2000 | Dissolved |
| DERWENT LONDON BAKER STREET LIMITED | 00806862 | 09/12/1999 | 01/07/2015 | Silver |
| DTZ HOLDINGS PLC. | 02088415 | 04/09/1991 | 06/09/2000 | Dissolved |
| DTZ IM (SPFS) LIMITED | 02047065 | 04/12/1991 | 06/09/2000 | Strike Off |
| Dtc Services Ltd | 02127406 | 14/09/1992 | 06/09/2000 | Dissolved |
| Dtz Newthorpe Ltd | 02776704 | 03/03/1993 | 06/09/2000 | Dissolved |
| NO. 1 EATON GATE MANAGEMENT COMPANY LIMITED | 01260616 | 13/09/1991 | 20/05/1994 | One Red Flag |
| PORTMAN BURTLEY ESTATE COMPANY LIMITED | 00554747 | 15/12/1999 | 05/04/2016 | Bronze |
| PORTMAN ESTATE MANAGEMENT LIMITED | 06325414 | 26/07/2007 | 31/12/2014 | Not Trading |
| PORTMAN INVESTMENTS (FARNHAM) LIMITED | 03662544 | 09/12/1999 | 07/12/2009 | Dissolved |
| PORTMAN SETTLED ESTATES LIMITED | 01055334 | 21/09/1999 | 31/12/2014 | Bronze |
| SEYMOUR STREET NOMINEES LIMITED | 01711120 | 09/12/1999 | 31/12/2014 | Not Trading |
| THE PORTMAN ESTATE NOMINEES (ONE) LIMITED | 05175327 | 16/12/2004 | 05/04/2016 | Not Trading |
| THE PORTMAN ESTATE NOMINEES (TWO) LIMITED | 05175370 | 16/12/2004 | 05/04/2016 | Not Trading |