| Symbol | Name | Country | Exchange |
|---|---|---|---|
| ATNM | Actinium Pharmaceuticals, Inc. | US | AMEX |
| NAVB | Navidea Biopharmaceuticals, Inc. | US | AMEX |
| SQM | Sociedad Quimica y Minera S.A. | US | NYSE |
| BLGO | Biolargo Inc | US | OTC |
| IOFNF | Iofina Plc | US | OTC |
| IOF | Iofina Plc | UK | LSE |
| 000931 | Beijing Centergate Technologies Holding Co Ltd | CN | SHE |
| EUZ | Eckert & Ziegler Strahlen- und Medizintechnik AG | DE | XETRA |