| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| GWM OPERATIONS LIMITED | 08644971 | 01/01/2014 | One Red Flag |
| OFFSHORE TERMINALS & TANKERS LTD. | 01219064 | 29/10/1991 | Amber |
| TRILOGY ASSETS LIMITED | 13056537 | 02/12/2020 | Bronze |
| TRILOGY VENTURES LTD | 12223035 | 23/09/2019 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AMINEX PETROLEUM SERVICES LTD. | 02081101 | 28/10/1991 | 18/10/1994 | Amber |
| AMINEX PETROLEUM SERVICES LTD. | 02081101 | 28/10/1991 | 31/08/2018 | Amber |
| AMOSSCO HOLDINGS LIMITED | 03995534 | 17/05/2000 | 23/12/2015 | Amber |
| AMOSSCO LIMITED | 02931885 | 16/08/1994 | 18/10/1994 | Silver |
| AMOSSCO LIMITED | 02931885 | 16/08/1994 | 23/12/2015 | Silver |
| AMOSSCO ODS LIMITED | 00646445 | 20/10/1994 | 23/12/2015 | Silver |
| BLACKLAND PARK EXPLORATION LIMITED | 01881647 | 25/09/1991 | 18/10/1994 | Silver |
| EAGLESTONE PETROLEUM LIMITED | 01579437 | 25/09/1992 | 18/10/1994 | Bronze |
| FORTUNE OIL LIMITED | 02173279 | 23/07/1991 | 18/10/1994 | Silver |
| HALYARD OFFSHORE LIMITED | 01246234 | 29/10/1991 | 18/10/1994 | Amber |
| HALYARD OFFSHORE LIMITED | 01246234 | 29/10/1991 | 31/08/2018 | Amber |
| OSCEOLA OIL AND GAS LIMITED | NI015987 | 04/08/1982 | 23/11/2015 | Amber |
| Roc Oil (Bel) Ltd | 01174987 | 25/09/1992 | 18/10/1994 | Dissolved |
| Roc Oil (E M O G) Ltd | 02245030 | 25/09/1992 | 18/10/1994 | Dissolved |
| SECURIT ROPES & PACKAGING LTD | 02992673 | 21/11/1994 | 21/08/2003 | Silver |