| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CROFT (UK) LIMITED | 03296644 | 16/08/1999 | Dissolved |
| CROFT (UK) LIMITED | 03296644 | 15/06/2000 | Dissolved |
| CROFT EXPLORATION LIMITED | SC092120 | 16/08/1999 | Dissolved |
| CROFT EXPLORATION LIMITED | SC092120 | 15/06/2000 | Dissolved |
| CROFT OFFSHORE OIL LIMITED | SC152234 | 16/08/1999 | Dissolved |
| CROFT OFFSHORE OIL LIMITED | SC152234 | 15/06/2000 | Dissolved |
| CROFT OIL AND GAS PLC | SC117890 | 16/08/1999 | Dissolved |
| CROFT OIL AND GAS PLC | SC117890 | 15/06/2000 | Dissolved |
| ROC OIL (FALKLANDS) LIMITED | 03532459 | 06/06/2000 | Dissolved |
| ROC OIL (NORTH SEA) LIMITED | 07302482 | 26/08/2010 | Dissolved |
| Roc Oil (Bel) Ltd | 01174987 | 16/08/1999 | Dissolved |
| Roc Oil (Bel) Ltd | 01174987 | 25/05/2000 | Dissolved |
| Roc Oil (E M O G) Ltd | 02245030 | 16/08/1999 | Dissolved |
| Roc Oil (E M O G) Ltd | 02245030 | 25/05/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DNO NORTH SEA (ROGB) LIMITED | 01852301 | 16/08/1999 | 05/11/2015 | Bronze |
| DNO NORTH SEA (ROGB) LIMITED | 01852301 | 25/05/2000 | 05/11/2015 | Bronze |
| DURMINE HOLDINGS LIMITED | 05202752 | 08/11/2004 | 05/11/2015 | Dissolved |
| DURMINE HOLDINGS LIMITED | 05202752 | 08/11/2004 | 05/11/2015 | Dissolved |
| ROC OIL (EUROPE) LIMITED | 02789239 | 16/08/1999 | 30/04/2020 | Dissolved |
| SALTFLEETBY ENERGY LIMITED | 00953066 | 16/08/1999 | 21/01/2005 | Bronze |
| SALTFLEETBY ENERGY LIMITED | 00953066 | 25/05/2000 | 21/01/2005 | Bronze |
| WINGAS STORAGE ENTERPRISE LIMITED | 00989348 | 16/08/1999 | 21/01/2005 | Dissolved |
| WINGAS STORAGE ENTERPRISE LIMITED | 00989348 | 25/05/2000 | 21/01/2005 | Dissolved |