| Symbol | Name | Country | Exchange |
|---|---|---|---|
| AMSU | Amanasu Environment | US | OTC |
| ATMFF | Atmofizer Technologies Inc | US | OTC |
| BIRMF | Biorem Inc | US | OTC |
| CCTC | Clean Coal Technolog | US | OTC |
| PGTK | Pacific Green Techno | US | OTC |
| 006140 | PJ Electronics Co. Ltd | KR | KQ |
| 001120 | LX International Corp | KR | KO |
| 000637 | Maoming Petro-Chemical Shihua Co Ltd | CN | SHE |
| 300275 | Chongqing Mas Sci&Tech | CN | SHE |
| SENS | Sensirion Holding AG | CH | SW |