| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Caber Oil Ltd | SC049154 | 18/06/1999 | Dissolved |
| Macmillan Natural Resources Ltd | 01010995 | 18/06/1999 | Dissolved |
| Pict Petroleum (Tunisia) Limited | SC141224 | 18/06/1999 | Dissolved |
| Premier Oil Halmahera Ltd | 00560601 | 18/06/1999 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AL HAJ PAKISTAN EXPLORATION LIMITED | 01164960 | 18/06/1999 | 29/11/2002 | Bronze |
| MAGHREB OFFSHORE LIMITED | 01057332 | 18/06/1999 | 29/03/2006 | Dissolved |
| PREMCO PETROLEUM (OIL AND GAS) LIMITED | 00868620 | 18/06/1999 | 29/03/2006 | Dissolved |
| PREMIER ENERGY ENTERPRISES LIMITED | 01164959 | 18/06/1999 | 29/03/2006 | Dissolved |
| PREMIER OIL (EBURY GATE) LIMITED | 03682706 | 18/06/1999 | 29/03/2006 | Dissolved |
| PREMIER OIL (NW NATUNA) LIMITED | 00963192 | 18/06/1999 | 29/03/2006 | Dissolved |
| PREMIER OIL ABERDEEN SERVICES LIMITED | 01164961 | 18/06/1999 | 29/03/2006 | Bronze |
| PREMIER OIL AND GAS SERVICES LIMITED | 03468792 | 18/06/1999 | 29/03/2006 | Gold |
| PREMIER OIL EXPLORATION LIMITED | SC021265 | 18/06/1999 | 29/03/2006 | Amber |
| PREMIER OIL FAR EAST LIMITED | 01135444 | 18/06/1999 | 29/03/2006 | Gold |
| PREMIER OIL HOLDINGS LIMITED | 03689620 | 18/06/1999 | 29/03/2006 | Amber |
| PREMIER OIL SOUTH ANDAMAN LIMITED | 01474678 | 18/06/1999 | 29/03/2006 | Amber |
| PREMIER OIL UK LIMITED | SC048705 | 18/06/1999 | 29/03/2006 | Silver |
| PREMIER OVERSEAS HOLDINGS LIMITED | 03689626 | 18/06/1999 | 29/03/2006 | Dissolved |
| Parambe Oil & Gas Operations Ltd | 01121594 | 18/06/1999 | 29/03/2006 | Dissolved |
| Premier Oil Albania (Holdings) Ltd | 03664109 | 18/06/1999 | 29/03/2006 | Dissolved |
| Premier Oil Dorset Ltd | 01165601 | 18/06/1999 | 29/03/2006 | Dissolved |
| Premier Oil Pangkah Ltd | 01012762 | 18/06/1999 | 29/03/2006 | Dissolved |
| Rocky Mountains Oil & Gas Ltd | 01505884 | 18/06/1999 | 29/03/2006 | Dissolved |