| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| DART ENERGY (CARBON STORAGE) LIMITED | SC323199 | 13/10/2015 | Dissolved |
| DART ENERGY (LOTHIAN) LIMITED | SC328864 | 13/10/2015 | Dissolved |
| IGAS EXPLORATION UK LIMITED | 04323945 | 13/10/2015 | Dissolved |
| SHOP WITH THE SCHOOL LIMITED | 04985353 | 10/07/2012 | Dissolved |
| SPEEDER PROPERTY SERVICES LLP | OC396188 | 30/10/2014 | Not Trading |
| STAR ENERGY (EAST MIDLANDS) LIMITED | 03966330 | 13/10/2015 | Dissolved |
| STAR ENERGY OIL & GAS LIMITED | 02275006 | 13/10/2015 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AOG FINANCE LIMITED | 05929234 | 15/11/2022 | 19/07/2024 | One Red Flag |
| AURELIAN OIL & GAS LIMITED | 01685863 | 15/11/2022 | 19/07/2024 | One Red Flag |
| CORNERSTONE RESOURCES GROUP PLC | 14953669 | 22/06/2023 | 16/10/2024 | Bronze |
| CRG HOLDCO LIMITED | 12901726 | 23/03/2022 | 16/10/2024 | Amber |
| DART ENERGY (EAST ENGLAND) LIMITED | 06760546 | 13/10/2015 | 31/07/2020 | One Red Flag |
| DART ENERGY (EUROPE) LIMITED | SC259898 | 13/10/2015 | 31/07/2020 | Gold |
| DART ENERGY (WEST ENGLAND) LIMITED | 06760557 | 13/10/2015 | 31/07/2020 | Amber |
| ENERGY AFRICA UK LIMITED | 02592792 | 05/08/2014 | 29/05/2015 | Dissolved |
| GREENPARK ENERGY TRANSPORTATION LIMITED | 06977962 | 13/10/2015 | 31/07/2020 | Not Trading |
| IGAS ENERGY DEVELOPMENT LIMITED | 07240286 | 13/10/2015 | 31/07/2020 | Bronze |
| IGAS ENERGY ENTERPRISE LIMITED | 05457589 | 13/10/2015 | 31/07/2020 | Bronze |
| IGAS ENERGY LIMITED | 05054503 | 13/10/2015 | 31/07/2020 | Gold |
| IGAS ENERGY PRODUCTION LIMITED | SC298739 | 13/10/2015 | 31/07/2020 | Bronze |
| ISLAND GAS (SINGLETON) LIMITED | 01021095 | 13/10/2015 | 31/07/2020 | Gold |
| ISLAND GAS LIMITED | 04962079 | 13/10/2015 | 31/07/2020 | Bronze |
| ISLAND GAS OPERATIONS LIMITED | 03999194 | 13/10/2015 | 31/07/2020 | Not Trading |
| PLANET OIL INTERNATIONAL LIMITED | 03589112 | 05/08/2014 | 29/05/2015 | Dissolved |
| SAN LEON ELI LIMITED | 12730851 | 15/11/2022 | 19/07/2024 | Three Red Flags (Highest) |
| SAN LEON ENERGY (UK) LIMITED | 08429495 | 15/11/2022 | 19/07/2024 | Bronze |
| SAN LEON HOLDINGS LIMITED | 12722890 | 15/11/2022 | 19/07/2024 | Bronze |
| SAN LEON OZA LIMITED | 12713718 | 15/11/2022 | 19/07/2024 | One Red Flag |
| STAR ENERGY GROUP PLC | 04981279 | 28/09/2015 | 14/06/2017 | Amber |
| STAR ENERGY LIMITED | 03806814 | 13/10/2015 | 31/07/2020 | Amber |
| STAR ENERGY WEALD BASIN LIMITED | 06293763 | 13/10/2015 | 31/07/2020 | One Red Flag |
| TULLOW CMS (NORTH SEA) LIMITED | 08593556 | 29/08/2014 | 29/05/2015 | Dissolved |
| TULLOW EXPLORATION & PRODUCTION UK LIMITED | SC359143 | 05/08/2014 | 29/05/2015 | Dissolved |
| TULLOW GREENLAND EXPLORATION LIMITED | 07781896 | 05/08/2014 | 29/05/2015 | Dissolved |
| TULLOW GROUP SERVICES LIMITED | 05660209 | 05/08/2014 | 29/05/2015 | Amber |
| TULLOW GUINEA LIMITED | 08233451 | 02/11/2012 | 29/05/2015 | Dissolved |
| TULLOW JAMAICA LIMITED | 09162755 | 24/09/2014 | 29/05/2015 | Dissolved |
| TULLOW MOZAMBIQUE LIMITED | 07672804 | 05/08/2014 | 29/05/2015 | Strike Off |
| TULLOW OIL (INTERNATIONAL) NORGE LIMITED | 08029991 | 05/08/2014 | 29/05/2015 | Dissolved |
| TULLOW OIL 101 LIMITED | 07639401 | 05/08/2014 | 29/05/2015 | Dissolved |
| TULLOW OIL FINANCE LIMITED | 08107505 | 11/10/2012 | 29/05/2015 | Bronze |
| TULLOW OIL SK LIMITED | 05287330 | 05/08/2014 | 29/05/2015 | Amber |
| TULLOW OIL SNS LIMITED | 05064884 | 05/08/2014 | 29/05/2015 | Dissolved |
| TULLOW OIL SPE LIMITED | 04609980 | 05/08/2014 | 29/05/2015 | Gold |
| TULLOW OIL TS LIMITED | 07117038 | 05/08/2014 | 29/05/2015 | Dissolved |
| TULLOW URUGUAY LIMITED | 08107466 | 05/08/2014 | 29/05/2015 | Gold |