| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Deroca Limited | 02086709 | 31/10/1991 | Dissolved |
| Deroca Limited | 02086709 | 31/10/1991 | Dissolved |
| Energylaw Llp | OC321540 | 10/08/2006 | Dissolved |
| SDC LNC LIMITED | 09125606 | 10/07/2014 | Dissolved |
| SDS ENERGY CONSULTANTS LIMITED | 04961093 | 12/11/2003 | Strike Off |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Blackfriars Oil & Gas Ltd | 00818091 | 19/07/1995 | 01/04/1996 | Dissolved |
| CALEDONIA EUROPE RESOURCES | 03568322 | 06/11/2001 | 23/10/2003 | Dissolved |
| CALEDONIA OFFSHORE DEVELOPMENT LIMITED | 02042719 | 06/11/2001 | 23/10/2003 | Dissolved |
| CENTRICA PRODUCTION (DMF) LIMITED | 01483729 | 30/09/1996 | 01/02/1999 | Dissolved |
| Caledonia Europe Hydrocarbons | 03568440 | 06/11/2001 | 23/10/2003 | Dissolved |
| E.ON RUHRGAS UK CAISTER LIMITED | 03883559 | 06/11/2001 | 23/10/2003 | Dissolved |
| E.On Ruhrgas Uk Holding Ltd | 03722631 | 06/11/2001 | 23/10/2003 | Dissolved |
| E.On Ruhrgas Uk Median Ltd | 03974196 | 06/11/2001 | 23/10/2003 | Dissolved |
| ENI LNS LIMITED | 00970280 | 19/07/1995 | 01/04/1996 | Not Trading |
| ENI TNS LIMITED | SC055200 | 19/07/1995 | 01/04/1996 | Not Trading |
| ENI TTO LIMITED | 00196665 | 19/07/1995 | 01/04/1996 | Dissolved |
| ENI ULX LIMITED | 00936223 | 15/06/1993 | 02/11/1993 | Silver |
| Eni Tns Holdings Ltd | 00518762 | 19/07/1995 | 01/04/1996 | Dissolved |
| FIRST OIL SNS LIMITED | 00986309 | 05/02/2002 | 23/10/2003 | Dissolved |
| Hautpas Ltd | 01137767 | 19/07/1995 | 01/04/1996 | Dissolved |
| ITHACA ALPHA (N.I.) LIMITED | NI073431 | 07/10/2011 | 25/04/2013 | Silver |
| ITHACA CAUSEWAY LIMITED | 06167799 | 22/05/2007 | 25/04/2013 | Not Trading |
| ITHACA DELTA LIMITED | 07541789 | 25/05/2011 | 25/04/2013 | Dissolved |
| ITHACA EPSILON LIMITED | 05979869 | 01/08/2011 | 25/04/2013 | Bronze |
| ITHACA EXPLORATION LIMITED | 05914627 | 07/09/2006 | 25/04/2013 | Gold |
| ITHACA GAMMA LIMITED | 05929104 | 28/05/2009 | 25/04/2013 | Bronze |
| ITHACA NORTH SEA LIMITED | 02548026 | 03/08/2005 | 25/04/2013 | Dissolved |
| ITHACA PETROLEUM LIMITED | 05223667 | 03/08/2005 | 25/04/2013 | Bronze |
| L A S M O (Corby) Ltd | 01125087 | 01/04/1996 | 14/07/1997 | Dissolved |
| LASMO (TSA) LIMITED | SC034216 | 19/07/1995 | 01/04/1996 | Dissolved |
| LASMO PETROLEUM (MINERALS) LIMITED | 01073330 | 19/07/1995 | 01/04/1996 | Dissolved |
| Lasmo (Tsp) Ltd | SC049025 | 19/07/1995 | 01/04/1996 | Dissolved |
| Lasmo (U D G ) Plc | 01234982 | 19/07/1995 | 01/04/1996 | Dissolved |
| Lasmo (W P) Inc | FC005626 | 03/04/1996 | 01/02/1999 | Dissolved |
| Lasmo Claymore Petroleum Ltd | SC056731 | 19/07/1995 | 01/04/1996 | Dissolved |
| Neptune (T T 0) | 01499050 | 19/07/1995 | 01/04/1996 | Dissolved |
| OXFORD CATALYSTS TRUSTEES LIMITED | 07788054 | 10/02/2016 | 30/09/2021 | Not Trading |
| PREMIER OIL E&P UK ENERGY TRADING LIMITED | 04103928 | 06/11/2001 | 23/10/2003 | Dissolved |
| PREMIER OIL E&P UK EU LIMITED | 02907493 | 06/11/2001 | 23/10/2003 | Silver |
| PTP ASSOCIATES LIMITED | 02992121 | 26/09/1995 | 21/04/2015 | Dissolved |
| VELOCYS PLC | 05712187 | 01/10/2012 | 30/09/2021 | Silver |