| Symbol | Name | Country | Exchange |
|---|---|---|---|
| GENC | Gencor Industries Inc. | US | AMEX |
| SSL | Sasol Ltd. | US | NYSE |
| BOPO | Biopower Operations | US | OTC |
| TRNX | Taronis Technologies Inc | US | OTC |
| VLS | Velocys Plc | UK | LSE |
| SOL | Sasol Ltd | ZA | JSE |
| SOLBE1 | Sasol Ltd Bee | ZA | JSE |
| 8QF | QUADRISE FUELS INT.LS-01 | DE | F |
| REPA | Repsol S.A | DE | F |
| REP | Repsol | DE | XETRA |
| 8QF | Quadrise Fuels International plc | DE | STU |
| 0NQG | Repsol | GB | LSE |
| REP | Repsol | ES | MC |