| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| 2 CROMWELL ROAD (MANAGEMENT) LIMITED | 06315034 | 18/01/2010 | Not Trading |
| HUGHES RESOURCES LIMITED | 06398574 | 15/10/2007 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AVALONIA ABBEYDALE LIMITED | 11648577 | 31/12/2018 | 11/11/2020 | Dissolved |
| AVALONIA ENERGY APPRAISAL LIMITED | 11999602 | 16/05/2019 | 11/11/2020 | Dissolved |
| AVALONIA ENERGY LIMITED | 11475497 | 31/12/2018 | 11/11/2020 | Dissolved |
| AVALONIA GODDARD LIMITED | 11586152 | 31/12/2018 | 11/11/2020 | Dissolved |
| CALENERGY INFRASTRUCTURE LIMITED | 07632910 | 19/04/2018 | 11/11/2020 | One Red Flag |
| CALENERGY NORTH SEA LIMITED | 07632999 | 19/04/2018 | 11/11/2020 | One Red Flag |
| CALENERGY RESOURCES (UK) LIMITED | 11999607 | 16/05/2019 | 28/10/2019 | Amber |
| CALENERGY SNS LIMITED | 08619688 | 19/04/2018 | 11/11/2020 | One Red Flag |
| EEEGR | 04117847 | 13/10/2005 | 14/10/2016 | Bronze |
| INEOS CLIPPER SOUTH B LIMITED | 04649606 | 09/05/2016 | 31/01/2018 | Gold |
| INEOS CLIPPER SOUTH C LIMITED | 04967270 | 09/05/2016 | 31/01/2018 | Bronze |
| INEOS OFFSHORE BCS LIMITED | 09687203 | 06/05/2016 | 31/01/2018 | One Red Flag |
| INEOS UK E&P HOLDINGS LIMITED | SC200459 | 09/05/2016 | 31/01/2018 | Amber |
| INEOS UK SNS LIMITED | 01021338 | 09/05/2016 | 31/01/2018 | Silver |
| IOG PLC | 07434350 | 19/04/2018 | 11/11/2020 | Insolvent |