| Symbol | Name | Country | Exchange |
|---|---|---|---|
| SOIS | Striker Oil & Gas | US | OTC |
| REXHF | Rex International Holding Limited | US | US |
| EXE | Expand Energy Corporation | US | US |
| EXEEL | Expand Energy Corporation | US | US |
| EXEEW | Expand Energy Corporation | US | US |
| EXEEZ | Expand Energy Corporation | US | US |
| HOJ | Horizon Oil Limited | DE | F |
| PE1 | Patterson-UTI Energy Inc | DE | F |
| RXI | Rex International Holding Limited | DE | F |
| CMG | Computer Modelling Group Ltd. | CA | TO |
| SAVE | Savannah Energy PLC | GB | LSE |
| HZN | Horizon Oil Ltd | AU | AU |