| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Aurelian Finance Ltd | 06713249 | 02/07/2009 | Dissolved |
| Bellerophon Oil & Gas Ltd | 02904794 | 09/03/1994 | Dissolved |
| EXCALIBUR EXPLORATION LIMITED | 03059175 | 08/05/2012 | Dissolved |
| Ezh Lenders Ltd | 06696653 | 12/09/2008 | Dissolved |
| Teredo Compania De Petroleos Limited | 02711179 | 30/04/1992 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AOG FINANCE LIMITED | 05929234 | 12/09/2006 | 07/09/2010 | One Red Flag |
| AURELIAN OIL & GAS LIMITED | 01685863 | 09/09/2002 | 25/05/2011 | One Red Flag |
| BALKAN EXPLORERS (BULGARIA) LIMITED | 05385260 | 11/03/2005 | 02/09/2010 | Dissolved |
| C MAW LIMITED | 02519643 | 16/02/2004 | 17/10/2023 | Dissolved |
| C-MAW WINES LIMITED | 07487605 | 10/01/2011 | 18/01/2022 | Dissolved |
| EXCALIBUR EXPLORATION (ASIA) LIMITED | 06851420 | 30/11/2013 | 20/02/2017 | Dissolved |
| ISLAND GAS (SINGLETON) LIMITED | 01021095 | 03/03/1992 | 07/06/1994 | One Red Flag |
| MEDUSA HYDROCARBONS LIMITED | 02684930 | 06/02/1993 | 27/01/2000 | Dissolved |
| MEDUSA OIL & GAS LIMITED | 03390249 | 17/06/1997 | 27/09/2002 | Dissolved |
| MONTROSE INDUSTRIES LIMITED | 00654944 | 14/02/1992 | 07/08/1997 | Silver |
| Marinex Exploration Ltd | 01520264 | 13/03/1991 | 07/06/1994 | Dissolved |
| Medusa Petroleum Ltd | 03307038 | 27/01/1997 | 31/12/2002 | Dissolved |
| ROCKHOPPER MEDITERRANEAN LIMITED | 05323487 | 10/05/2011 | 11/10/2012 | Silver |
| Ramco Bulgaria Ltd | SC210953 | 16/10/2000 | 27/09/2002 | Dissolved |
| Ramco Seven Heads Ltd | SC172163 | 12/02/2001 | 01/08/2002 | Dissolved |
| SEAENERGY PLC | SC062845 | 01/07/2001 | 30/09/2002 | Dissolved |
| TEREDO OILS LIMITED | 01740802 | 13/03/1991 | 18/11/1994 | Dissolved |
| TRAJAN OIL & GAS LIMITED | 07217669 | 14/04/2010 | 25/02/2019 | Dissolved |