| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| OIL & GAS INVESTMENTS LIMITED. | 04651928 | 03/02/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ATI OIL (ONSHORE) LIMITED | 05214052 | 31/08/2004 | 25/07/2013 | Dissolved |
| BALNAPALING ENERGY HOLDINGS LIMITED | 04329897 | 28/11/2001 | 25/07/2013 | Dissolved |
| CABOT ENERGY LIMITED | 02933545 | 08/04/1999 | 10/07/2013 | One Red Flag |
| NIGG ENVIRONMENTAL SERVICES LIMITED | 04330058 | 28/11/2001 | 25/07/2013 | Dissolved |
| NORTHERN PETROLEUM (UK) LIMITED | 03970675 | 13/04/2000 | 25/07/2013 | One Red Flag |
| NORTHERN PETROLEUM E&P HOLDINGS LIMITED | 03971175 | 13/04/2000 | 25/07/2013 | Dissolved |
| NORTHERN PETROLEUM LIMITED | 04993628 | 07/01/2004 | 25/07/2013 | Dissolved |
| NORTHERN PETROLEUM NEW VENTURES LIMITED | 05214033 | 31/08/2004 | 25/07/2013 | Dissolved |
| NORTHPET INVESTMENTS LIMITED | 05220748 | 02/09/2004 | 25/07/2013 | Strike Off |
| NP NETHERLANDS LIMITED | 04993632 | 11/11/2004 | 25/07/2013 | One Red Flag |
| NP OFFSHORE HOLDINGS (UK) LIMITED | 04993507 | 19/03/2004 | 25/07/2013 | Dissolved |
| NP OIL & GAS HOLDINGS LIMITED | 04991255 | 07/01/2004 | 25/07/2013 | Amber |
| POZAS LIMITED | 05081705 | 20/04/2005 | 25/07/2013 | Dissolved |
| UKOG (GB) LIMITED | 04050227 | 16/08/2000 | 25/07/2013 | Gold |
| UKOG SOLENT LIMITED | 05000092 | 19/03/2004 | 25/07/2013 | Dissolved |
| UKOG WEALD LIMITED | 04991234 | 07/01/2004 | 25/07/2013 | Dissolved |