EcoR1 Capital, LLC 13D and 13G filings for Prothena Corporation plc:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime |
Transaction Date |
Type | Company Symbol |
Filed By Symbol |
Shares Owned % Owned |
Shares Vs. Prev Report | View |
| 2025-05-29 9:08 pm Sale |
2025-05-27 | 13D | Prothena Corporation plc PRTA |
EcoR1 Capital, LLC | 0 0.000% |
-5,304,596 (Position Closed) |
Filing |
| 2025-05-06 7:08 pm Sale |
2025-05-02 | 13D | Prothena Corporation plc PRTA |
EcoR1 Capital, LLC | 5,304,596 9.900% |
-6,279,684 (-54.21%) |
Filing |
| 2025-01-03 7:45 pm Unchanged |
2024-12-31 | 13D | Prothena Corporation plc PRTA |
EcoR1 Capital, LLC | 11,584,280 21.500% |
0 (Unchanged) |
Filing |
| 2022-01-13 6:45 pm Purchase |
2022-01-12 | 13D | Prothena Corporation plc PRTA |
EcoR1 Capital, LLC | 11,584,280 24.900% |
2,157,640 (+22.89%) |
Filing |