| 8 Aug 2019 |
| BAKER BROS. ADVISORS LP |
| director, 10 percent owner: |
| P-Purchase |
| Acquired |
| 9,445 |
| $2.83 |
| 8 Aug 2019 | BAKER BROS. ADVISORS LP | director, 10 percent owner: | P-Purchase | Acquired | 4,564 | $3.15 |
| 8 Aug 2019 | BAKER BROS. ADVISORS LP | director, 10 percent owner: | P-Purchase | Acquired | 18,943 | $3.02 |
| 8 Aug 2019 | BAKER BROS. ADVISORS LP | director, 10 percent owner: | P-Purchase | Acquired | 531 | $2.96 |
| 8 Aug 2019 | BAKER BROS. ADVISORS LP | director, 10 percent owner: | P-Purchase | Acquired | 5,932 | $2.85 |
| 8 Aug 2019 | BAKER BROS. ADVISORS LP | director, 10 percent owner: | P-Purchase | Acquired | 855 | $2.83 |