| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ENI ENGINEERING E&P LIMITED | 08324293 | 13/06/2017 | Dissolved |
| KARACHAGANAK PROJECT DEVELOPMENT LIMITED | 03294212 | 15/06/2017 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BURREN ENERGY INDIA LIMITED | 05319270 | 13/06/2017 | 24/03/2022 | Gold |
| BURREN ENERGY PLC | 03492720 | 13/06/2017 | 24/03/2022 | Gold |
| ENI AMBALAT LIMITED | 03968980 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI ARGUNI I LIMITED | 07683960 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI AUSTRALIA LIMITED | 01020949 | 13/06/2017 | 24/03/2022 | Amber |
| ENI BTC LIMITED | 01044120 | 13/06/2017 | 24/03/2022 | Amber |
| ENI BUKAT LIMITED | 03856870 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI CBM LIMITED | 07036327 | 13/06/2017 | 24/03/2022 | Gold |
| ENI EAST GANAL LIMITED | 11409270 | 11/06/2018 | 24/03/2022 | Not Trading |
| ENI EAST SEPINGGAN LIMITED | 08102459 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI GANAL LIMITED | 03771954 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI HEWETT LIMITED | SC090159 | 13/06/2017 | 24/03/2022 | Silver |
| ENI INDIA LIMITED | 02735371 | 13/06/2017 | 24/03/2022 | Amber |
| ENI INDONESIA LIMITED | 02334535 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI INTERNATIONAL RESOURCES LIMITED | 04339898 | 27/06/2017 | 09/04/2019 | Bronze |
| ENI INVESTMENTS PLC | 04126448 | 27/06/2017 | 24/03/2022 | Gold |
| ENI JPDA 03-13 LIMITED | 02664257 | 13/06/2017 | 24/03/2022 | Silver |
| ENI KRUENG MANE LIMITED | 03562003 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI LASMO PLC | 01008965 | 13/06/2017 | 24/03/2022 | Gold |
| ENI LIVERPOOL BAY OPERATING COMPANY LIMITED | 01003825 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI LNS LIMITED | 00970280 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI MOZAMBIQUE ENGINEERING LIMITED | 09104675 | 10/09/2020 | 24/03/2022 | Dissolved |
| ENI NORTH GANAL LIMITED | 07814541 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI OIL ALGERIA LIMITED | 02274210 | 13/06/2017 | 24/03/2022 | Silver |
| ENI RAPAK LIMITED | 03771987 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI TNS LIMITED | SC055200 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI UHL LIMITED | 00916179 | 13/06/2017 | 24/03/2022 | Silver |
| ENI UK HOLDING PLC | 06428648 | 13/06/2017 | 24/03/2022 | Silver |
| ENI UK LIMITED | 00862823 | 13/06/2017 | 08/04/2021 | Silver |
| ENI ULT LIMITED | 00301317 | 13/06/2017 | 24/03/2022 | Silver |
| ENI ULX LIMITED | 00936223 | 13/06/2017 | 24/03/2022 | Silver |
| ENI WEST GANAL LIMITED | 12227735 | 25/09/2019 | 24/03/2022 | Not Trading |
| ENI WEST TIMOR LIMITED | 06606325 | 13/06/2017 | 24/03/2022 | Not Trading |
| ENI YEMEN LIMITED | 05567365 | 13/06/2017 | 24/03/2022 | Gold |
| ITHACA EF LIMITED | 03772746 | 13/06/2017 | 24/03/2022 | Silver |
| ITHACA UKCS LIMITED | 01019748 | 13/06/2017 | 24/03/2022 | Silver |
| LIVERPOOL BAY LIMITED | 08555007 | 13/06/2017 | 24/03/2022 | Dissolved |
| NORTH SEA WIND LIMITED | 13029372 | 18/11/2020 | 24/03/2022 | Silver |
| OIL SPILL RESPONSE LIMITED | 01808594 | 13/06/2019 | 10/03/2022 | Silver |
| PRIME AEP LIMITED | 00307812 | 13/06/2017 | 24/03/2022 | Gold |
| PRIME PAKISTAN LIMITED | 00151940 | 13/06/2017 | 24/03/2022 | Silver |
| VIC CBM LIMITED | 07079191 | 14/06/2017 | 24/03/2022 | Amber |
| VIRGINIA INDONESIA CO. CBM LIMITED | 07079220 | 14/06/2017 | 24/03/2022 | Amber |