| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BIOGENERATION LIMITED | 02970302 | 07/03/2008 | 01/10/2009 | Dissolved |
| E.ON CLIMATE & RENEWABLES CARBON SOURCING LIMITED | 02884146 | 30/06/2009 | 22/06/2012 | Dissolved |
| E.ON UK INFRASTRUCTURE SERVICES LIMITED | 07537806 | 22/03/2011 | 22/06/2012 | Silver |
| Garnedd Power Co Ltd | 02603991 | 14/05/2003 | 17/11/2005 | Dissolved |
| LONDON ARRAY LIMITED | 04344423 | 05/08/2004 | 23/07/2007 | Bronze |
| RAMPION OFFSHORE WIND LIMITED | 07199847 | 21/04/2010 | 22/06/2012 | Silver |
| RWE RENEWABLES UK BLYTH LIMITED | 03834283 | 30/06/2003 | 22/06/2012 | Amber |
| RWE RENEWABLES UK LIMITED | 03758404 | 07/04/2008 | 22/06/2012 | Silver |
| RWE RENEWABLES UK OPERATIONS LIMITED | 02692529 | 16/05/2007 | 22/06/2012 | Gold |
| RWE RENEWABLES UK ROBIN RIGG EAST LIMITED | 03568724 | 24/11/2003 | 22/06/2012 | Silver |
| RWE RENEWABLES UK ROBIN RIGG WEST LIMITED | 04150735 | 24/11/2003 | 22/06/2012 | Silver |
| RWE RENEWABLES UK SCROBY SANDS LIMITED | 04127830 | 13/09/2001 | 22/06/2012 | Bronze |
| RWE RENEWABLES UK ZONE SIX LIMITED | 07054842 | 04/11/2009 | 22/06/2012 | Not Trading |
| TPG WIND LIMITED | 02682587 | 12/09/2001 | 22/06/2012 | Silver |
| WINDY HILLS LIMITED | NI027739 | 19/12/2006 | 20/06/2012 | Dissolved |
| YORKSHIRE WINDPOWER LIMITED | 02528475 | 30/06/2003 | 22/06/2012 | Silver |