T. Rowe Price Associates, Inc. 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 |
| 2025-08-14 1:07 pm Sale | 2025-06-30 | 13G | PROTHENA CORP PLC SHS PRTA | T. Rowe Price Associates, Inc. | 71,047 0.100% | -3,751,387 (-98.14%) | Filing |
| 2024-11-14 1:22 pm Sale | 2024-09-30 | 13G | PROTHENA CORP PLC SHS PRTA | T. Rowe Price Associates, Inc. | 3,822,434 7.100% | -420,576 (-9.91%) | Filing |
| 2024-02-14 10:03 am Purchase | 2023-12-31 | 13G | PROTHENA CORP PLC SHS PRTA | T. Rowe Price Associates, Inc. | 4,243,010 7.900% | 1,037,107 (+32.35%) | Filing |
| 2023-02-14 12:38 pm Purchase | 2022-12-31 | 13G | PROTHENA CORP PLC SHS PRTA | T. Rowe Price Associates, Inc. | 3,205,903 6.300% | 198,392 (+6.60%) | Filing |
| 2022-08-10 2:56 pm Sale | 2022-07-31 | 13G | PROTHENA CORP PLC SHS PRTA | T. Rowe Price Associates, Inc. | 3,007,511 6.400% | -2,941,350 (-49.44%) | Filing |
| 2022-02-14 2:34 pm Purchase | 2021-12-31 | 13G | PROTHENA CORP PLC SHS PRTA | T. Rowe Price Associates, Inc. | 5,948,861 12.700% | 775,253 (+14.98%) | Filing |
| 2021-06-10 12:44 pm Purchase | 2021-05-31 | 13G | PROTHENA CORP PLC SHS PRTA | T. Rowe Price Associates, Inc. | 5,173,608 11.700% | 3,656,970 (+241.12%) | Filing |