| Company | Symbol | Filed By | Filing Date | Filing |
|---|---|---|---|---|
| Iliad Research & Trading, L.p. | 2018-07-27 | |||
| Stonepine Capital Management, Llc | 2018-02-13 | |||
| Perkins Capital Management Inc | 2018-01-26 | |||
| Stonepine Capital Management, Llc | 2017-12-21 | |||
| Perkins Capital Management Inc | 2017-02-09 |