| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ATI OIL (ONSHORE) LIMITED | 05214052 | 26/06/2013 | Dissolved |
| ATI OIL E&P LIMITED | 06749735 | 26/07/2013 | Dissolved |
| ATI OIL ITALY LIMITED | 06749686 | 26/06/2013 | Dissolved |
| BALNAPALING ENERGY HOLDINGS LIMITED | 04329897 | 26/07/2013 | Dissolved |
| NIGG ENVIRONMENTAL SERVICES LIMITED | 04330058 | 26/07/2013 | Dissolved |
| NORTHERN PETROLEUM NEW VENTURES LIMITED | 05214033 | 26/07/2013 | Dissolved |
| POZAS LIMITED | 05081705 | 26/07/2013 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| NORTHERN PETROLEUM (UK) LIMITED | 03970675 | 26/07/2013 | 01/08/2018 | One Red Flag |
| NORTHERN PETROLEUM E&P HOLDINGS LIMITED | 03971175 | 26/07/2013 | 01/08/2018 | Dissolved |
| NORTHERN PETROLEUM LIMITED | 04993628 | 26/07/2013 | 01/08/2018 | Dissolved |
| NORTHPET INVESTMENTS LIMITED | 05220748 | 26/07/2013 | 05/11/2018 | Strike Off |
| NP NETHERLANDS LIMITED | 04993632 | 26/07/2013 | 01/08/2018 | One Red Flag |
| NP OFFSHORE HOLDINGS (UK) LIMITED | 04993507 | 26/07/2013 | 01/08/2018 | Dissolved |
| NP OIL & GAS HOLDINGS LIMITED | 04991255 | 26/07/2013 | 11/07/2018 | Amber |
| UKOG (GB) LIMITED | 04050227 | 26/07/2013 | 17/10/2014 | Gold |
| UKOG SOLENT LIMITED | 05000092 | 26/07/2013 | 17/10/2014 | Dissolved |
| UKOG WEALD LIMITED | 04991234 | 26/07/2013 | 17/10/2014 | Dissolved |