| Equinor Energy AS | 409 |
| ENI | 119 |
| PERENCO OIL & GAS | 69 |
| Aker BP ASA | 68 |
| ConocoPhillips Skandinavia AS | 61 |
| Mærsk | 54 |
| WIN | 52 |
| Vår Energi ASA | 51 |
| ROYAL DUTCH SHELL | 46 |
| NEPTUNE | 44 |
| NAM | 41 |
| TOTAL | 35 |
| Gassco AS | 31 |
| CHRYSAOR HOLDINGS | 28 |
| SPIRIT ENERGY | 26 |
| CEFAS | 25 |
| OKEA ASA | 25 |
| REPSOL SINOPEC RESOURCES | 18 |
| TOTALENERGIES UPSTREAM UK LIMITED | 18 |
| EDISON | 17 |
| INAgip | 17 |
| ENI UK LIMITED | 14 |
| APACHE CORPORATION | 12 |
| PETROGAS | 12 |
| Neptune Energy Norge AS | 10 |
| TAQA OFF | 10 |
| A/S Norske Shell | 9 |
| BP EXPLORATION | 9 |
| ITHACA ENERGY | 9 |
| Repsol Norge AS | 9 |
| Wintershall Dea Norge AS | 9 |
| Lundin Energy Norway AS | 8 |
| TAQA EUROPA B.V. | 8 |
| CNOOC INTERNATIONAL | 7 |
| CNR INTERNATIONAL | 7 |
| DANA | 7 |
| DONG E & P | 7 |
| GDFP | 7 |
| HARBOUR ENERGY PLC | 6 |
| ONE-DYAS | 6 |
| PSE Kinsale Energy | 6 |
| CENTRICA STORAGE HOLDINGS | 5 |
| ENQUEST PLC | 5 |
| ENI MEDITERRANEA IDROCARBURI | 4 |
| Hess Denmark | 4 |
| INEOS INDUSTRIES | 4 |
| NEPTUNE E&P | 4 |
| ONE | 4 |
| ALPHA PETROLEUM UK HOLDINGS | 3 |
| EMU LIMITED | 3 |
| EQUINOR ASA | 3 |
| FUGRO | 3 |
| Repsol Inv, (RIPSA) | 3 |
| SERICA ENERGY | 3 |
| TotalEnergies EP Norge AS | 3 |