| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Agip Trading Services Ltd | 03005842 | 06/07/2007 | Dissolved |
| E N I Liverpool Bay Ltd | 02566262 | 16/05/2006 | Dissolved |
| ENI ANS LIMITED | 02554093 | 24/05/2006 | Dissolved |
| ENI BB LIMITED | 00261640 | 16/05/2006 | Dissolved |
| ENI MEP LIMITED | 00231611 | 16/05/2006 | Dissolved |
| ENI TTO LIMITED | 00196665 | 16/05/2006 | Dissolved |
| ENI VENTURES PLC | 03939723 | 16/05/2006 | Dissolved |
| Eni Securities Ltd | 02351633 | 16/05/2006 | Dissolved |
| Lasmo Grand Maghreb Ltd | 02466698 | 06/07/2007 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ENI AMBALAT LIMITED | 03968980 | 16/05/2006 | 10/04/2012 | Not Trading |
| ENI AUSTRALIA LIMITED | 01020949 | 16/05/2006 | 10/04/2012 | Amber |
| ENI BUKAT LIMITED | 03856870 | 16/05/2006 | 10/04/2012 | Not Trading |
| ENI CBM LIMITED | 07036327 | 06/10/2009 | 10/04/2012 | Gold |
| ENI COTE D'IVOIRE LIMITED | 02556415 | 16/05/2006 | 10/04/2012 | Amber |
| ENI GANAL LIMITED | 03771954 | 16/05/2006 | 10/04/2012 | Not Trading |
| ENI HEWETT LIMITED | SC090159 | 28/11/2008 | 10/04/2012 | Silver |
| ENI HYDROCARBONS VENEZUELA LIMITED | 01452037 | 16/05/2006 | 10/04/2012 | Gold |
| ENI INDIA LIMITED | 02735371 | 16/05/2006 | 10/04/2012 | Amber |
| ENI INDONESIA LIMITED | 02334535 | 16/05/2006 | 10/04/2012 | Not Trading |
| ENI INTERNATIONAL RESOURCES LIMITED | 04339898 | 14/05/2007 | 30/04/2012 | Bronze |
| ENI INVESTMENTS PLC | 04126448 | 16/05/2006 | 30/04/2012 | Gold |
| ENI JPDA 03-13 LIMITED | 02664257 | 16/05/2006 | 10/04/2012 | Silver |
| ENI KRUENG MANE LIMITED | 03562003 | 16/05/2006 | 10/04/2012 | Not Trading |
| ENI LASMO PLC | 01008965 | 16/05/2006 | 10/04/2012 | Gold |
| ENI LIVERPOOL BAY OPERATING COMPANY LIMITED | 01003825 | 16/05/2006 | 10/04/2012 | Not Trading |
| ENI LNS LIMITED | 00970280 | 16/05/2006 | 10/04/2012 | Not Trading |
| ENI OIL ALGERIA LIMITED | 02274210 | 16/05/2006 | 10/04/2012 | Silver |
| ENI PAPALANG LIMITED | 04530307 | 16/05/2006 | 10/04/2012 | Dissolved |
| ENI POPODI LIMITED | 04530309 | 16/05/2006 | 10/04/2012 | Dissolved |
| ENI RAPAK LIMITED | 03771987 | 16/05/2006 | 10/04/2012 | Not Trading |
| ENI TNS LIMITED | SC055200 | 16/05/2006 | 10/04/2012 | Not Trading |
| ENI UHL LIMITED | 00916179 | 16/05/2006 | 10/04/2012 | Silver |
| ENI UK HOLDING PLC | 06428648 | 21/11/2007 | 10/04/2012 | Silver |
| ENI UK LIMITED | 00862823 | 16/05/2006 | 10/04/2012 | Silver |
| ENI ULT LIMITED | 00301317 | 16/05/2006 | 10/04/2012 | Silver |
| ENI ULX LIMITED | 00936223 | 16/05/2006 | 10/04/2012 | Silver |
| ITHACA EF LIMITED | 03772746 | 16/05/2006 | 10/04/2012 | Silver |
| ITHACA UKCS LIMITED | 01019748 | 16/05/2006 | 10/04/2012 | Silver |
| PRIME AEP LIMITED | 00307812 | 16/05/2006 | 10/04/2012 | Gold |
| PRIME PAKISTAN LIMITED | 00151940 | 16/05/2006 | 10/04/2012 | Silver |
| VIC CBM LIMITED | 07079191 | 17/11/2009 | 10/04/2012 | Amber |
| VIRGINIA INDONESIA CO. CBM LIMITED | 07079220 | 17/11/2009 | 10/04/2012 | Amber |