| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| British Agip Oil Co Ltd | 00104274 | 30/09/1996 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ENI AUSTRALIA LIMITED | 01020949 | 11/12/2001 | 02/12/2002 | Amber |
| ENI BB LIMITED | 00261640 | 11/05/2000 | 10/05/2001 | Dissolved |
| ENI BRUPEX LIMITED | 00135247 | 11/05/2000 | 10/05/2001 | Dissolved |
| ENI COTE D'IVOIRE LIMITED | 02556415 | 11/05/2000 | 10/05/2001 | Amber |
| ENI ELGIN/FRANKLIN LIMITED | 03772746 | 11/05/2000 | 10/05/2001 | Silver |
| ENI HYDROCARBONS VENEZUELA LIMITED | 01452037 | 11/05/2000 | 10/05/2001 | Gold |
| ENI INDIA LIMITED | 02735371 | 01/10/1994 | 22/07/1998 | Amber |
| ENI INTERNATIONAL RESOURCES LIMITED | 04339898 | 13/12/2001 | 12/03/2003 | Bronze |
| ENI INVESTMENTS PLC | 04126448 | 12/12/2000 | 16/05/2006 | Gold |
| ENI JPDA 03-13 LIMITED | 02664257 | 11/05/2000 | 10/05/2001 | Silver |
| ENI LASMO PLC | 01008965 | 06/02/2001 | 29/09/2006 | Gold |
| ENI UK LIMITED | 00862823 | 28/09/1994 | 29/09/2006 | Silver |
| ENI VENTURES PLC | 03939723 | 22/03/2000 | 03/04/2006 | Dissolved |
| PRIME AEP LIMITED | 00307812 | 11/05/2000 | 10/05/2001 | Gold |
| PRIME PAKISTAN LIMITED | 00151940 | 02/06/2004 | 05/09/2004 | Silver |