| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ARDMORE RESOURCES LIMITED | 03304237 | 23/01/1997 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BAYFIELD ENERGY (ALPHA) LTD | 07349534 | 18/08/2010 | 03/06/2011 | Dissolved |
| BAYFIELD ENERGY (BETA) LTD | 07349346 | 18/08/2010 | 03/06/2011 | Dissolved |
| BAYFIELD ENERGY LIMITED | 06395419 | 17/06/2008 | 03/06/2011 | One Red Flag |
| BAYFIELD ENERGY NEW VENTURES LIMITED | 07430822 | 05/11/2010 | 03/06/2011 | Dissolved |
| BEACON RESOURCES LIMITED | 03272632 | 20/11/1996 | 30/09/2016 | Gold |
| BURREN ENERGY (EGYPT) LIMITED | 04948245 | 07/01/2004 | 01/02/2008 | One Red Flag |
| BURREN ENERGY PLC | 03492720 | 10/03/1998 | 12/09/2003 | Gold |
| Burren Energy (Oman) Ltd | 05650588 | 09/12/2005 | 01/02/2008 | Dissolved |
| Burren Energy New Ventures Ltd | 05890173 | 07/08/2006 | 01/02/2008 | Dissolved |
| ENI YEMEN LIMITED | 05567365 | 19/09/2005 | 01/02/2008 | Gold |
| Penlan Consulting Ltd | 03408159 | 28/08/1997 | 01/10/1998 | Dissolved |
| TRINITY EXPLORATION AND PRODUCTION (PLETMOS) LIMITED | 07433783 | 09/11/2010 | 03/06/2011 | Dissolved |
| TRINITY EXPLORATION AND PRODUCTION SERVICES (UK) LIMITED | 06581076 | 10/07/2008 | 03/06/2011 | One Red Flag |