| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| LONDON & STRATEGIC ESTATES LIMITED | 01587092 | 23/09/1999 | Silver |
| Rigby Lane Management Co Ltd | 03500773 | 04/03/1998 | Dissolved |
| Slough Business Park Ltd | 06673546 | 15/08/2008 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 1-11 WILLOW LANE MANAGEMENT COMPANY LIMITED | 05413511 | 04/04/2005 | 22/09/2006 | Silver |
| ASHBY MILLS SCHOOL MANAGEMENT COMPANY LIMITED | 03897321 | 20/12/1999 | 07/01/2003 | Silver |
| BIRCH DEVELOPMENTS LIMITED | 01917322 | 20/02/1992 | 25/04/1994 | Dissolved |
| BOREHAMWOOD BUSINESS PARK MANAGEMENT LIMITED | 06491441 | 01/02/2008 | 12/04/2010 | Dissolved |
| BROOKES MARKET MANAGEMENT COMPANY LIMITED | 03152625 | 11/06/1997 | 10/11/1999 | Silver |
| CASSLAND ROAD MANAGEMENT COMPANY LIMITED | 03809455 | 19/07/1999 | 28/06/2002 | Not Trading |
| CHESHAM BUSINESS PARK MANAGEMENT LIMITED | 05858062 | 26/06/2006 | 20/05/2008 | Dissolved |
| COMMERCE ROAD BUSINESS PARK MANAGEMENT COMPANY LIMITED | 05182439 | 19/07/2004 | 07/04/2006 | Bronze |
| GREENWICH ACADEMY MANAGEMENT COMPANY LIMITED | 03149735 | 10/02/1997 | 31/03/2000 | Silver |
| HAWLEY LANE BUSINESS PARK MANAGEMENT COMPANY LIMITED | 07282566 | 14/06/2010 | 20/12/2012 | One Red Flag |
| JOHNSON STREET MANAGEMENT COMPANY LIMITED | 05926944 | 06/09/2006 | 15/07/2008 | Bronze |
| Long Drive Management Co Ltd | 05182433 | 19/07/2004 | 14/02/2007 | Dissolved |
| MANOR HOUSE BUSINESS PARK MANAGEMENT COMPANY LIMITED | 07203434 | 12/04/2010 | 10/05/2012 | One Red Flag |
| Metro House Management Co Ltd | 02992430 | 11/06/1997 | 24/11/1997 | Dissolved |
| PROSPECT WORKS MANAGEMENT COMPANY LIMITED | 05376232 | 25/02/2005 | 11/07/2007 | Silver |
| SIGNALGRANGE LIMITED | 01933207 | 28/01/2000 | 28/09/2015 | Gold |
| SOUTH SIDE QUARTER MANAGEMENT COMPANY LIMITED | 03152606 | 11/06/1997 | 22/05/1998 | Silver |
| SOUTH WALK MANAGEMENT COMPANY LIMITED | 03152598 | 11/06/1997 | 13/10/1997 | Silver |
| THE LYCEE MANAGEMENT COMPANY LIMITED | 03313576 | 06/02/1997 | 29/11/1999 | Not Trading |
| THE OLD HYDE FARM SCHOOL MANAGEMENT COMPANY LIMITED | 03628201 | 08/09/1998 | 21/08/2000 | Gold |
| THE PARAGON CENTRE MANAGEMENT COMPANY LIMITED | 03398727 | 04/07/1997 | 31/03/2000 | Not Trading |
| VANTAGE BUSINESS PARK MANAGEMENT COMPANY LIMITED | 05016814 | 15/01/2004 | 01/11/2004 | Gold |
| WATERSIDE TRADING CENTRE MANAGEMENT COMPANY LIMITED | 02384290 | 11/06/1997 | 21/01/1998 | Silver |
| WIDETOWER LIMITED | 04009436 | 27/07/2000 | 14/05/2009 | Dissolved |
| WILLIAM SAPCOTE DEVELOPMENT LIMITED | 01604265 | 31/03/1996 | 31/12/2012 | Silver |