| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Kerr-McGee Glamis Ltd | SC117458 | 10/03/1999 | Dissolved |
| Kerr-McGee Petroleum (U.K.) Ltd | 03519187 | 10/03/1999 | Dissolved |
| OPHL INVESTMENT LIMITED | 08845026 | 22/06/2015 | Dissolved |
| ORTUS PETROLEUM LIMITED | SC633413 | 09/10/2019 | Dissolved |
| VPHL MANAGEMENT INVESTMENT LIMITED | SC477185 | 30/07/2015 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CALENERGY SNS LIMITED | 08619688 | 22/06/2015 | 27/10/2016 | One Red Flag |
| CENTRAL GRABEN EXPLORATION LIMITED | 05000672 | 01/09/2004 | 02/02/2006 | Dissolved |
| ENQUEST BRITAIN LIMITED | 03628497 | 27/03/2006 | 13/01/2009 | Amber |
| ENQUEST HEATHER LIMITED | 02748866 | 27/03/2006 | 13/01/2009 | Silver |
| ENQUEST THISTLE LIMITED | 04487223 | 27/03/2006 | 13/01/2009 | Insolvent |
| HFA LIMITED | SC129298 | 14/04/2009 | 30/09/2011 | Gold |
| MAERSK OIL GRYPHON LIMITED | 01316633 | 20/01/2000 | 02/02/2006 | Dissolved |
| Maersk Oil York Ltd | 03078424 | 10/03/1999 | 02/02/2006 | Dissolved |
| NEO ENERGY (CNS) LIMITED | SC309081 | 22/07/2014 | 30/09/2019 | Bronze |
| NEO ENERGY (EXPLORATION) LIMITED | SC279866 | 22/07/2014 | 30/09/2019 | Silver |
| NEO ENERGY (NORTH SEA) LIMITED | 08649342 | 22/06/2015 | 30/09/2019 | Dissolved |
| NEO ENERGY (PRODUCTION) LIMITED | 05896824 | 22/07/2014 | 30/09/2019 | Bronze |
| NEO ENERGY (SNS) LIMITED | SC291165 | 22/07/2014 | 30/09/2019 | Amber |
| NEO ENERGY ENTERPRISES (NORTH SEA) LIMITED | 05073058 | 22/07/2014 | 30/09/2019 | Dissolved |
| NEO ENERGY ENTERPRISES LIMITED | 04388397 | 22/07/2014 | 30/09/2019 | Strike Off |
| NEO ENERGY EXPLORATION UK LIMITED | 08266502 | 28/10/2016 | 30/09/2019 | Bronze |
| NEO ENERGY GROUP LIMITED | SC470677 | 24/06/2015 | 30/09/2019 | Silver |
| NEO ENERGY OIL & GAS LIMITED | 05400854 | 22/07/2014 | 30/09/2019 | Strike Off |
| NEO ENERGY UPSTREAM UK LIMITED | SC279865 | 18/12/2014 | 30/09/2019 | Bronze |
| NORTHERN INTEGRATED SERVICES LIMITED | SC195682 | 30/04/2009 | 30/09/2011 | Dissolved |
| OFFSHORE CONTRACTORS ASSOCIATION | SC170910 | 28/05/2009 | 25/05/2011 | Dissolved |
| SIGMA 3 (NORTH SEA) LIMITED | SC224630 | 30/04/2009 | 16/05/2011 | Dissolved |
| THE UK OFFSHORE ENERGIES ASSOCIATION LIMITED | 01119804 | 27/03/2006 | 19/04/2007 | Bronze |
| TOTALENERGIES E&P NORTH SEA UK LIMITED | 03682299 | 24/02/1999 | 02/02/2006 | Silver |
| TOTALENERGIES E&P RESOURCES UK LIMITED | 03295116 | 10/03/1999 | 02/02/2006 | Not Trading |
| TOTALENERGIES OFFSHORE GB LIMITED | 03530988 | 10/03/1999 | 02/02/2006 | Silver |
| TOTALENERGIES OFFSHORE UK LIMITED | 00946986 | 10/03/1999 | 02/02/2006 | Silver |
| WOOD GROUP ENGINEERING (NORTH SEA) LIMITED | SC030715 | 14/04/2009 | 30/09/2011 | Gold |