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 |