| Symbol | Name | Country | Exchange |
|---|---|---|---|
| CLZNF | Clariant Ag Nam Akt | US | OTC |
| CLZNY | Clariant Ag Unsp | US | OTC |
| IZCFF | International Zeolite Corp. | US | OTC |
| TOSCF | Tosoh Corp [Japan] | US | OTC |
| IZ | International Zeolite Corp. | CA | TSXV |
| 300779 | Qingdao Huicheng Environmental Co Ltd | CN | SHE |
| ARB3 | PROGRESSIVE PLANET SOL. | DE | F |
| PQGA | ECOVYST INC. DL-01 | DE | F |
| ZEON | INTL ZEOLITE | DE | F |
| IZ | International Zeolite Corp | CA | V |
| PLAN | Progressive Planet Solutions Inc | CA | V |