| Symbol | Name | Country | Exchange |
|---|---|---|---|
| AVTXF | Avantium N V | US | OTC |
| FUPBY | Fuchs Petrolub Se | US | OTC |
| IOFNF | Iofina Plc | US | OTC |
| MUEL | Paul Mueller Company | US | OTC |
| SKPO | Skye Petroleum Inc | US | OTC |
| SPXSF | Spirax-Sarco Engineering plc | US | OTC |
| WATR | Current Water Technologies Inc. | CA | TSXV |
| IOF | Iofina Plc | UK | LSE |
| ACO | Atlas Copco A ADR | DE | F |