| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CHEMRING GROUP PLC | 00086662 | 03/06/2020 | Bronze |
| COSTAIN GROUP PLC | 01393773 | 06/04/2022 | Gold |
| E P I LIMITED | 04458520 | 01/07/2019 | Amber |
| EPI AMERICAS LTD | 08966711 | 01/07/2019 | One Red Flag |
| EPI GLOBAL LTD | 08938405 | 01/07/2019 | One Red Flag |
| EPI GROUP HOLDINGS LTD | 08960180 | 01/07/2019 | Bronze |
| FALKLAND OIL AND GAS LIMITED | FC026234 | 18/01/2016 | Dissolved |
| FERREXPO PLC | 05432915 | 12/08/2019 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CORO ENERGY PLC | 10472005 | 12/12/2017 | 25/03/2022 | Amber |
| DESIRE PETROLEUM LIMITED | 03168611 | 18/01/2016 | 04/07/2017 | Silver |
| ECHO ENERGY ARGENTINA HOLDINGS LIMITED | 11023721 | 20/10/2017 | 20/12/2018 | Not Trading |
| ECHO ENERGY BOLIVIA (HOLD CO 1) UK LTD | 10760859 | 05/07/2017 | 20/12/2018 | Not Trading |
| ECHO ENERGY BOLIVIA (HOLD CO 2) UK LTD | 10762120 | 05/07/2017 | 20/12/2018 | Not Trading |
| ECHO ENERGY BOLIVIA (OP CO 1) UK LTD | 10761861 | 05/07/2017 | 20/12/2018 | Silver |
| ECHO ENERGY BOLIVIA (OP CO 2) UK LTD | 10763803 | 05/07/2017 | 20/12/2018 | Not Trading |
| ECHO ENERGY C D AND LLC LTD | 11029613 | 24/10/2017 | 20/12/2018 | Not Trading |
| ECHO ENERGY HOLDINGS (UK) LTD | 10756541 | 05/07/2017 | 20/12/2018 | Not Trading |
| ECHO ENERGY TAPI AIKE LTD | 11029574 | 24/10/2017 | 20/12/2018 | Not Trading |
| ECO ENERGY CDL OP LTD | 11031406 | 25/10/2017 | 20/12/2018 | Silver |
| ECO ENERGY TA OP LTD | 11031381 | 25/10/2017 | 20/12/2018 | Silver |
| INDEPENDENT RESOURCES (KSAR HADADA) LIMITED | 05509934 | 05/07/2017 | 20/12/2018 | Dissolved |
| INDEPENDENT RESOURCES (SAHARA) LIMITED | 09822830 | 05/07/2017 | 20/12/2018 | Dissolved |
| INDEPENDENT RESOURCES (TUNISIA) LIMITED | 09865825 | 05/07/2017 | 20/12/2018 | Dissolved |
| IOG PLC | 07434350 | 10/07/2018 | 02/05/2023 | Insolvent |
| NATIVO RESOURCES PLC | 05483127 | 05/07/2017 | 31/05/2019 | One Red Flag |
| ROCKHOPPER CROATIA LIMITED | 09394182 | 19/01/2015 | 04/07/2017 | Not Trading |
| ROCKHOPPER EXPLORATION (HYDROCARBONS) LIMITED | 05376027 | 31/01/2014 | 04/07/2017 | Bronze |
| ROCKHOPPER EXPLORATION (OIL) LIMITED | 05357356 | 31/01/2014 | 04/07/2017 | Not Trading |
| ROCKHOPPER EXPLORATION (PETROCHEMICALS) LIMITED | 05360110 | 31/01/2014 | 04/07/2017 | Not Trading |
| ROCKHOPPER EXPLORATION PLC | 05250250 | 15/03/2013 | 04/07/2017 | Silver |
| ROCKHOPPER RESOURCES LIMITED | 03010287 | 31/01/2014 | 04/07/2017 | Not Trading |