| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| PREMCO PETROLEUM (OIL AND GAS) LIMITED | 00868620 | 12/07/2006 | Dissolved |
| PREMIER ENERGY ENTERPRISES LIMITED | 01164959 | 12/07/2006 | Dissolved |
| PREMIER OIL (EBURY GATE) LIMITED | 03682706 | 12/07/2006 | Dissolved |
| PREMIER OIL (NW NATUNA) LIMITED | 00963192 | 12/07/2006 | Dissolved |
| Parambe Oil & Gas Operations Ltd | 01121594 | 12/07/2006 | Dissolved |
| Premier Oil Dorset Ltd | 01165601 | 12/07/2006 | Dissolved |
| Premier Oil Gabon Ltd | 04718829 | 12/07/2006 | Dissolved |
| Premier Oil Pangkah Ltd | 01012762 | 12/07/2006 | Dissolved |
| Rocky Mountains Oil & Gas Ltd | 01505884 | 12/07/2006 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AL HAJ PAKISTAN EXPLORATION LIMITED | 01164960 | 11/07/2006 | 14/07/2010 | Silver |
| Enron Secretaries Ltd | 04182052 | 08/10/2001 | 30/11/2001 | Dissolved |
| MAGHREB OFFSHORE LIMITED | 01057332 | 12/07/2006 | 14/07/2010 | Dissolved |
| PKP EXPLORATION 2 LIMITED | 05951450 | 29/09/2006 | 29/06/2007 | Bronze |
| PREMIER OIL ABERDEEN SERVICES LIMITED | 01164961 | 12/07/2006 | 14/07/2010 | Amber |
| PREMIER OIL AND GAS SERVICES LIMITED | 03468792 | 12/07/2006 | 14/07/2010 | Silver |
| PREMIER OIL EXPLORATION LIMITED | SC021265 | 12/07/2006 | 14/07/2010 | Silver |
| PREMIER OIL EXPLORATION ONS LIMITED | 01241035 | 21/05/2008 | 14/07/2010 | Insolvent |
| PREMIER OIL FAR EAST LIMITED | 01135444 | 12/07/2006 | 14/07/2010 | Bronze |
| PREMIER OIL HOLDINGS LIMITED | 03689620 | 12/07/2006 | 14/07/2010 | Amber |
| PREMIER OIL ONS LIMITED | 04453364 | 21/05/2008 | 14/07/2010 | Not Trading |
| PREMIER OIL SOUTH ANDAMAN LIMITED | 01474678 | 12/07/2006 | 14/07/2010 | Bronze |
| PREMIER OIL UK LIMITED | SC048705 | 12/07/2006 | 14/07/2010 | Amber |
| PREMIER OVERSEAS HOLDINGS LIMITED | 03689626 | 12/07/2006 | 14/07/2010 | Dissolved |
| Premier Oil Albania (Holdings) Ltd | 03664109 | 12/07/2006 | 14/07/2010 | Dissolved |