| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Lasmo (W P) Inc | FC005626 | 14/08/1990 | Dissolved |
| Lasmo International Petroleum Ltd | 04127245 | 13/12/2000 | Dissolved |
| Lasmo Iran Holdings Ltd | 04124506 | 08/12/2000 | Dissolved |
| Lasmo Libya Holdings Ltd | 04124540 | 08/12/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Blackfriars Oil & Gas Ltd | 00818091 | 29/05/1992 | 02/11/1993 | Dissolved |
| CARILLION JM LIMITED | 00077628 | 01/05/1997 | 23/02/2006 | Insolvent |
| DNO NORTH SEA PLC | 04622251 | 01/04/2003 | 31/08/2007 | Amber |
| ENI INTERNATIONAL LIMITED | 01431033 | 08/05/1992 | 16/02/1994 | Dissolved |
| ENI LASMO PLC | 01008965 | 08/05/1992 | 30/04/2001 | Gold |
| ENI LNS LIMITED | 00970280 | 08/05/1992 | 02/11/1993 | Not Trading |
| ENI MIDDLE EAST LIMITED | 03180997 | 04/04/1996 | 30/04/2001 | Amber |
| ENI MOG LIMITED | 03211318 | 14/06/1999 | 30/01/2001 | Dissolved |
| ENI TNS LIMITED | SC055200 | 05/01/1990 | 02/11/1993 | Not Trading |
| ENI TTO LIMITED | 00196665 | 08/05/1992 | 02/11/1993 | Dissolved |
| ENI ULT LIMITED | 00301317 | 29/05/1992 | 16/02/1994 | Silver |
| ENI ULX LIMITED | 00936223 | 29/05/1992 | 02/11/1993 | Silver |
| Eni International Exploration Ltd | 02451388 | 08/05/1992 | 16/02/1994 | Dissolved |
| Eni Overseas Holdings Ltd | 01431776 | 09/02/1993 | 16/02/1994 | Dissolved |
| Eni Tns Holdings Ltd | 00518762 | 08/05/1992 | 02/11/1993 | Dissolved |
| GREAT BRITISH NUCLEAR | 05027024 | 17/03/2005 | 31/12/2008 | Silver |
| Hautpas Ltd | 01137767 | 08/05/1992 | 02/11/1993 | Dissolved |
| L A S M O (Corby) Ltd | 01125087 | 29/05/1992 | 02/11/1993 | Dissolved |
| LASMO (TSA) LIMITED | SC034216 | 27/10/1988 | 02/11/1993 | Dissolved |
| LASMO PETROLEUM (MINERALS) LIMITED | 01073330 | 08/05/1992 | 02/11/1993 | Dissolved |
| Lasmo (Tsp) Ltd | SC049025 | 26/12/1988 | 02/11/1993 | Dissolved |
| Lasmo (U D G ) Plc | 01234982 | 29/05/1992 | 02/11/1993 | Dissolved |
| Lasmo Claymore Petroleum Ltd | SC056731 | 27/11/1991 | 02/11/1993 | Dissolved |
| Lasmo Cumi-Cumi Ltd | 02544269 | 08/05/1992 | 16/02/1994 | Dissolved |
| Lasmo Singapore Ltd | 01852008 | 25/01/1993 | 16/02/1994 | Dissolved |
| MALLARDS REACH (OAKLEY) MANAGEMENT COMPANY LIMITED | 04731934 | 15/11/2006 | 01/06/2010 | Dissolved |
| Neptune (T T 0) | 01499050 | 08/05/1992 | 02/11/1993 | Dissolved |
| PERENCO OIL AND GAS COLOMBIA LIMITED | 01789505 | 08/05/1992 | 16/02/1994 | Gold |
| Rothesay Forestry Limited | SC065418 | 26/12/1988 | 29/06/1990 | Dissolved |
| SELLAFIELD LIMITED | 01002607 | 23/01/2002 | 31/03/2005 | Silver |