| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| COMTRACK (UK) LIMITED | 09411128 | 09/09/2015 | Amber |
| GAPS GEOLOGICAL CONSULTANTS UK LIMITED | 05450712 | 16/05/2005 | Dissolved |
| Pegasus Energy Ventures Ltd | 03007042 | 06/01/1995 | Dissolved |
| REGNENSES EXPLORATION LIMITED | 11350967 | 09/05/2018 | Dissolved |
| SBC RESOURCES LIMITED | 11229515 | 28/02/2018 | Dissolved |
| SIMCO ENERGY MANAGEMENT LIMITED | 03083009 | 24/07/1995 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CORETON LIMITED | 01302137 | 04/08/1993 | 21/03/1997 | Not Trading |
| Drake Partners Ltd | 02934629 | 29/06/1995 | 19/09/1999 | Dissolved |
| Fitzbrook Petroleum Ltd | 05309255 | 03/02/2005 | 04/06/2007 | Dissolved |
| Gaps Geological Consultants Ltd | 01676595 | 18/12/1992 | 17/07/1997 | Dissolved |
| LABTON LIMITED | 02502923 | 01/08/1994 | 21/03/1997 | Not Trading |
| PETROGAS E&P UK LIMITED | 05152884 | 23/12/2004 | 11/11/2009 | Amber |
| REABOLD SOUTHERN NORTH SEA LIMITED | 07905535 | 20/05/2015 | 03/01/2023 | Silver |
| STORECORE LIMITED | 02784918 | 28/04/1993 | 29/03/1996 | Dissolved |
| Trinidad Exploration & Development Ltd | 02575280 | 17/12/1996 | 05/02/1998 | Dissolved |