| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| DEVELOPMENT SECURITIES (NO.1) LIMITED | 03266774 | 29/01/2016 | Dissolved |
| HAMMERSMITH CENTRAL (GENERAL PARTNER) LIMITED | 06071749 | 12/09/2007 | Dissolved |
| HAMMERSMITH CENTRAL (NO.1) LIMITED | 06086302 | 29/01/2016 | Dissolved |
| HAMMERSMITH CENTRAL (NO.2) LIMITED | 06086303 | 29/01/2016 | Dissolved |
| HAMMERSMITH CENTRAL SOUTH (NOMINEES) LIMITED | 07356503 | 29/01/2016 | Dissolved |
| HAMMERSMITH CENTRAL SOUTH GENERAL PARTNER LIMITED | 07431059 | 10/11/2010 | Dissolved |
| THE HORNIMAN PUBLIC MUSEUM AND PUBLIC PARK TRUST | 02456393 | 19/10/2017 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ADVANCED RESEARCH CLUSTERS MANAGEMENT LIMITED | 08796523 | 29/01/2016 | 30/07/2019 | One Red Flag |
| B.I.P. MANAGEMENT LIMITED | 02923457 | 29/01/2016 | 11/06/2019 | One Red Flag |
| BECKET HOUSE ASSET MANAGEMENT LIMITED | 07750927 | 29/01/2016 | 30/07/2019 | Dissolved |
| BIRMINGHAM INTERNATIONAL PARK LIMITED | 01091753 | 29/01/2016 | 30/07/2019 | Dissolved |
| CAMBOURNE BUSINESS PARK LIMITED | 03618543 | 29/01/2016 | 30/07/2019 | Gold |
| CAMBOURNE BUSINESS PARK MANAGEMENT LIMITED | 03894720 | 29/01/2016 | 30/07/2019 | Not Trading |
| CIRCUS STREET DEVELOPMENTS LIMITED | 08212639 | 08/06/2017 | 30/07/2019 | One Red Flag |
| CURZON PARK LIMITED | 05680321 | 29/01/2016 | 30/07/2019 | One Red Flag |
| D S PROPERTY DEVELOPMENTS LIMITED | 00610733 | 29/01/2016 | 30/07/2019 | Dissolved |
| DEVELOPMENT SECURITIES (CURZON PARK) LIMITED | 05303295 | 29/01/2016 | 30/07/2019 | Not Trading |
| DEVELOPMENT SECURITIES (HAMMERSMITH) LIMITED | 07638529 | 29/01/2016 | 30/07/2019 | Not Trading |
| DEVELOPMENT SECURITIES (LICHFIELD) LIMITED | 05396102 | 25/09/2017 | 30/07/2019 | Dissolved |
| DEVELOPMENT SECURITIES (SLOUGH) LIMITED | 05680330 | 29/01/2016 | 30/07/2019 | One Red Flag |
| DEVELOPMENT SECURITIES ESTATES LIMITED | 00657311 | 29/01/2016 | 30/07/2019 | Not Trading |
| HARWELL OXFORD DEVELOPMENTS (GP) LIMITED | 08753118 | 29/01/2016 | 30/07/2019 | Silver |
| HARWELL OXFORD DEVELOPMENTS LIMITED | 08753117 | 29/01/2016 | 30/07/2019 | Amber |
| HDD LICHFIELD LIMITED | 07356450 | 25/09/2017 | 30/07/2019 | Dissolved |
| HDD NEWCASTLE UNDER LYME LIMITED | 06287508 | 25/09/2017 | 30/07/2019 | Dissolved |
| HEART OF SLOUGH MANAGEMENT COMPANY LIMITED | 06086244 | 29/01/2016 | 30/07/2019 | Not Trading |
| HSIC GP1 LIMITED | 08008701 | 29/01/2016 | 03/04/2017 | Not Trading |
| HSIC GP2 LIMITED | 08008736 | 29/01/2016 | 03/04/2017 | Not Trading |
| MAYFIELD DEVELOPMENT (GENERAL PARTNER) LIMITED | 10525869 | 14/12/2016 | 30/07/2019 | Gold |
| SPECTRE (HAYES) LIMITED | 09425124 | 25/09/2017 | 30/07/2019 | One Red Flag |
| THE HARWELL QUAD ONE LIMITED | 10289329 | 21/07/2016 | 03/04/2017 | Bronze |
| THE HARWELL SCIENCE AND INNOVATION CAMPUS GENERAL PARTNER LIMITED | 06456598 | 29/01/2016 | 03/04/2017 | Silver |
| THE HARWELL SCIENCE AND INNOVATION CAMPUS NOMINEE LIMITED | 06539339 | 29/01/2016 | 03/04/2017 | Not Trading |
| TLD (LANDMARK COURT) LIMITED | 11104333 | 08/12/2017 | 30/07/2019 | Silver |
| TTL SOUTHWARK PROPERTIES LIMITED | 08212651 | 29/01/2016 | 20/03/2018 | Bronze |
| U AND I (8AE) LIMITED | 10167296 | 06/05/2016 | 30/07/2019 | One Red Flag |
| U AND I (BROMLEY COMMERCIAL) LIMITED | 11143031 | 10/01/2018 | 30/07/2019 | Not Trading |
| U AND I (DEVELOPMENT AND TRADING) LIMITED | 02850465 | 01/08/2003 | 30/07/2019 | Gold |
| U AND I (PB) COMMERCIAL LIMITED | 11822935 | 12/02/2019 | 30/07/2019 | Silver |
| U AND I PPP LIMITED | 04378676 | 12/03/2018 | 30/07/2019 | Silver |