| Raffineria di Milazzo | 50.00 | - | - | |
| Eni Iraq | 100.00 | - | - | |
| Sea Corridor | 49.90 | - | - | |
| Società Enipower Ferrara SRL | 51.00 | - | - | |
| Spanish Egyptian Gas Company | 50.00 | - | - | |
| AET-Raffineriebeteiligungsgesellschaft | 33.33 | - | - | |
| Eni International | 100.00 | - | - | |
| Nigeria LNG | 10.40 | - | - | |
| Eni JPDA 11-106 | 100.00 | - | - | |
| Eni Congo | 100.00 | - | - | |
| Eni Energy Group | - | - | - | |
| Eni Rewind | 100.00 | - | - | |
| North Caspian Operating Company NV | 16.81 | - | - | |
| Eni International (N.A.) NV | 100.00 | - | - | |
| Bayernoil Raffineriegesellschaft | 20.00 | - | - | |
| Baku-Tbilisi-Ceyhan Pipeline | 5.00 | - | - | |
| Enipower Mantova | 86.50 | - | - | |
| Karachaganak Petroleum Operating | 29.25 | - | - | |
| Transalpine Pipeline Group | - | - | - | |
| Enipower | 51.00 | - | - | |