| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| AUPEC LIMITED | SC177095 | 17/04/1998 | Bronze |
| CROSS VENTURES (GP) UNLIMITED | SC396525 | 29/03/2011 | One Red Flag |
| DEO PETROLEUM EXPLORATION LIMITED | 07872978 | 09/08/2012 | Dissolved |
| DEO PETROLEUM LIMITED | 03882653 | 09/08/2012 | Strike Off |
| DEO PETROLEUM U.K. LIMITED | 07336090 | 09/08/2012 | Strike Off |
| ENERGY MANAGEMENT ASSOCIATES LIMITED | SC144476 | 20/05/1993 | Amber |
| HIGH BLACKWOOD WIND ENERGY LIMITED | SC765118 | 05/04/2023 | Dissolved |
| KEMPSTONE HILL WIND ENERGY LIMITED | SC387256 | 31/01/2022 | Bronze |
| LOCHARD ENERGY GROUP LIMITED | 05209284 | 25/07/2013 | Dissolved |
| OBSIDIAN RESOURCES LIMITED | SC309296 | 24/11/2011 | Strike Off |
| PARKMEAD (E&P) LIMITED | SC397002 | 04/04/2011 | One Red Flag |
| PARKMEAD EMPLOYEE BENEFIT TRUST LIMITED | 04676351 | 15/03/2011 | Dissolved |
| PITREADIE FARM LIMITED | SC510252 | 20/01/2020 | Silver |
| THE PARKMEAD GROUP PLC | 03914068 | 06/10/2006 | Gold |
| TILESTAMP LIMITED | SC213858 | 26/02/2001 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ABERNESS LTD. | SC050246 | 23/02/2001 | 31/05/2002 | Dissolved |
| ANTARES PROPERTY DEVELOPMENT LIMITED | SC460023 | 24/09/2014 | 31/03/2021 | One Red Flag |
| DANA PETROLEUM (BVUK) LIMITED | 03337437 | 30/04/2009 | 08/11/2010 | Silver |
| DANA PETROLEUM (E&P) LIMITED | 02294746 | 05/09/1997 | 08/11/2010 | Silver |
| DANA PETROLEUM (RUSSIA) LIMITED | 02240304 | 30/12/1994 | 02/02/2000 | Dissolved |
| DANA PETROLEUM LIMITED | 03456891 | 23/10/1997 | 08/11/2010 | Amber |
| THE UK OFFSHORE ENERGIES ASSOCIATION LIMITED | 01119804 | 01/06/2005 | 19/04/2007 | Bronze |