| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| D MCMANUS CONSULTING LIMITED | 08177778 | 17/08/2014 | Dissolved |
| GENEL ENERGY | FC036102 | 05/02/2020 | Amber |
| PIONEER NATURAL RESOURCES UK LIMITED | 05392901 | 15/03/2005 | Dissolved |
| PIONEER NATURAL RESOURCES UK LIMITED | 05392901 | 15/03/2005 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ARCO BRITISH INTERNATIONAL, INC. | FC017837 | 03/01/1995 | 10/07/2000 | Dissolved |
| ARCO BRITISH LIMITED, LLC | FC005677 | 03/01/1995 | 10/07/2000 | Silver |
| ARCO EURASIA AND AFRICA LIMITED | 03123430 | 25/03/1996 | 10/07/2000 | Dissolved |
| ATLANTIC RICHFIELD OIL & GAS (ST JAMES) LIMITED | 02710823 | 31/01/1995 | 01/12/2000 | Dissolved |
| BG ASIA, INC. | FC018399 | 23/05/2000 | 30/09/2004 | Amber |
| BG EGYPT S.A. | FC016185 | 23/05/2000 | 30/09/2004 | Amber |
| BG ENERGY HOLDINGS LIMITED | 03763515 | 28/11/2000 | 30/09/2004 | Gold |
| BG GREAT BRITAIN LIMITED | 00909162 | 23/05/2000 | 30/09/2004 | Amber |
| BG INTERNATIONAL LIMITED | 00902239 | 23/05/2000 | 30/09/2004 | Gold |
| BG IRAN LIMITED | 02997897 | 23/05/2000 | 30/09/2004 | Dissolved |
| BG KARACHAGANAK LIMITED | 03294207 | 23/05/2000 | 30/09/2004 | Bronze |
| BG NORTH SEA HOLDINGS LIMITED | 02383911 | 23/05/2000 | 30/09/2004 | Silver |
| BG ROSETTA LIMITED | 05203667 | 11/08/2004 | 30/09/2004 | Silver |
| BG SOUTH EAST ASIA LIMITED | 02334822 | 23/05/2000 | 30/09/2004 | Not Trading |
| BG THAILAND LIMITED | 02466384 | 23/05/2000 | 30/09/2004 | Dissolved |
| CAPE INTERMEDIATE HOLDINGS LIMITED | 00040203 | 03/11/2004 | 17/06/2011 | Silver |
| CHRYSAOR NORTH SEA LIMITED | 00958880 | 23/05/2000 | 07/02/2001 | Silver |
| COSTAIN GROUP PLC | 01393773 | 12/05/2014 | 19/06/2020 | Gold |
| Gulfstream Qatar Ltd | 02532248 | 23/05/2000 | 15/01/2001 | Dissolved |
| HYDROCARBONS OFFSHORE SERVICES LIMITED | 01796415 | 23/05/2000 | 30/09/2004 | Dissolved |
| NEO ENERGY GROUP LIMITED | SC470677 | 16/05/2018 | 30/09/2019 | Silver |
| NEO ENERGY UPSTREAM UK LIMITED | SC279865 | 16/05/2018 | 30/09/2019 | Bronze |
| REPSOL TRANSPORTATION (UT) LIMITED | 03093642 | 09/10/1998 | 28/04/2000 | Gold |
| ROCKHOPPER EXPLORATION PLC | 05250250 | 30/09/2010 | 15/05/2019 | Silver |
| SHELL GAS MARKETING U.K LIMITED | 04246096 | 23/08/2004 | 30/09/2004 | Gold |
| SHELL TRINIDAD AND TOBAGO LIMITED | 02386676 | 23/05/2000 | 30/09/2004 | Silver |
| SHELL TUNISIA UPSTREAM LIMITED | 02750465 | 23/05/2000 | 30/09/2004 | Gold |
| Tricentrol | 00145954 | 09/10/1998 | 01/05/2005 | Dissolved |
| UNION TEXAS ENERGY DEVELOPMENT LIMITED | 03158814 | 09/10/1998 | 10/07/2000 | Dissolved |
| UNION TEXAS PETROLEUM | 00708552 | 09/10/1998 | 10/07/2000 | Dissolved |
| Union Texas Britannia | 02894635 | 09/10/1998 | 10/07/2000 | Dissolved |
| Union Texas Gas | 03347259 | 09/10/1998 | 10/07/2000 | Dissolved |