| Symbol | Name | Country | Exchange |
|---|---|---|---|
| 8PY | PyroGenesis Canada Inc | DE | F |
| CK7 | China Everbright Greentech Limited | DE | F |
| H2Y | CAPITAL ENVIRO.HLDG.HD-01 | DE | F |
| UBW1 | Babcock & Wilcox Enterprises Inc | DE | F |
| W9K | CO2 CAPSOL AS NK 1 | DE | F |
| ZAZZ-B | ZAZZ Energy of Sweden AB | SE | ST |
| ECT | Environmental Clean Technologies Ltd | AU | AU |