| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ECOLOGICAL CONTINUITY TRUST | 06652160 | 25/07/2008 | Gold |
| ECOLOGICAL CONTINUITY TRUST | 06652160 | 25/07/2008 | Gold |
| NATUREBUREAU LIMITED | 02369556 | 02/11/2007 | Gold |
| SYLVA FOUNDATION | 06589157 | 10/07/2017 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BERKSHIRE WILDLIFE TRUST LIMITED | 03769671 | 13/05/1999 | 18/11/2006 | Not Trading |
| BERKSHIRE,BUCKINGHAMSHIRE AND OXFORDSHIRE NATURALISTS' TRUST LTD | 03769693 | 13/05/1999 | 18/11/2006 | Not Trading |
| BERKSHIRE,BUCKINGHAMSHIRE AND OXFORDSHIRE WILDLIFE TRUST | 00680007 | 25/10/1996 | 18/11/2006 | Silver |
| BERKSHIRE,BUCKINGHAMSHIRE AND OXFORDSHIRE WILDLIFE TRUST | 00680007 | 01/10/1991 | 01/07/2005 | Silver |
| BUCKINGHAMSHIRE WILDLIFE TRUST LIMITED | 03769684 | 13/05/1999 | 18/11/2006 | Not Trading |
| EARTH TRUST | 04381522 | 06/12/2002 | 12/06/2003 | Bronze |
| EARTH TRUST | 04381522 | 26/02/2002 | 01/07/2005 | Bronze |
| FUTURE NATURE WTC LTD | 02648728 | 03/05/2002 | 18/11/2006 | Not Trading |
| FUTURE NATURE WTC LTD | 02648728 | 09/02/1998 | 24/01/2006 | Not Trading |
| OXFORDSHIRE WILDLIFE TRUST LIMITED | 03769703 | 13/05/1999 | 18/11/2006 | Not Trading |
| THAMES VALLEY WILDLIFE TRUST LIMITED | 03808836 | 16/07/1999 | 18/11/2006 | Not Trading |
| THE INSTITUTE OF ECOLOGY AND ENVIRONMENTAL MANAGEMENT | 02639067 | 27/11/2002 | 30/06/2005 | Gold |
| THE INSTITUTE OF ECOLOGY AND ENVIRONMENTAL MANAGEMENT | 02639067 | 11/11/2009 | 06/11/2013 | Gold |
| TRUST FOR OXFORDSHIRE'S ENVIRONMENT (TOE) LTD | 07492087 | 14/01/2011 | 25/09/2014 | Silver |
| TRUST FOR OXFORDSHIRE'S ENVIRONMENT LIMITED | 03578107 | 09/06/1998 | 26/05/2005 | Dissolved |
| WILD OXFORDSHIRE | 06828051 | 24/02/2009 | 08/12/2014 | Silver |