| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BIRSAY ENERGY LIMITED | 03948272 | 28/12/2007 | Silver |
| HAMMARS HILL ENERGY LIMITED | SC301103 | 01/05/2009 | Bronze |
| ORKNEY RENEWABLE ENERGY LIMITED | SC232619 | 11/02/2004 | Gold |
| ORKNEY SUSTAINABLE ENERGY LIMITED | SC160432 | 10/11/1995 | Silver |
| Orkney Wind Ltd | SC180413 | 27/08/1999 | Dissolved |
| SAMTO LIMITED | SC475717 | 22/04/2014 | Dissolved |
| Sustainable Resources Ltd | SC143682 | 02/04/1993 | Dissolved |
| THORKELL RENEWABLE ENERGY LIMITED | SC365949 | 02/07/2010 | Silver |
| WESTRAY WIND POWER LIMITED | SC375464 | 11/04/2016 | Gold |
| WORKING ENERGY LIMITED | 14707632 | 06/03/2023 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BALNAMOON RENEWABLES LIMITED | SC272029 | 07/09/2004 | 01/07/2022 | Silver |
| NORTH WIND ASSOCIATES LIMITED | SC323888 | 17/05/2007 | 31/05/2010 | One Red Flag |
| REDLAND RENEWABLES LIMITED | SC272713 | 31/08/2004 | 31/08/2013 | Dissolved |
| STROMNESS COMMUNITY DEVELOPMENT TRUST | SC305725 | 20/07/2006 | 31/10/2018 | Silver |