Real time Form 13D and 13G transaction reports:
- 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.
- Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
- Shares have beem adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2025-11-14 7:47 pm Sale | 2025-09-30 | 13G | Prothena Corporation plc PRTA | ADAR1 Capital Management, LLC | 1,469,098 2.700% | -1,905,911 (-56.47%) | Filing History |
| 2025-11-12 3:51 pm Purchase | 2025-09-30 | 13G | Prothena Corporation plc PRTA | Fennell Todd W. | 4,495,846 8.400% | 145,000 (+3.33%) | Filing History |
| 2025-11-12 3:47 pm Sale | 2025-09-30 | 13G | Prothena Corporation plc PRTA | SCULLY WILLIAM P | 5,281,846 9.800% | -70,000 (-1.31%) | Filing History |
| 2025-10-17 4:07 pm Purchase | 2025-09-30 | 13G | Prothena Corporation plc PRTA | BlackRock Inc. BLK | 3,092,261 5.700% | 3,092,261 (New Position) | Filing History |
| 2025-08-14 8:17 pm Purchase | 2025-06-30 | 13G | Prothena Corporation plc PRTA | ADAR1 Capital Management, LLC | 3,375,009 6.300% | 3,375,009 (New Position) | Filing History |
| 2025-08-14 1:16 pm Sale | 2025-06-30 | 13G | Prothena Corporation plc PRTA | Logos Global Management LP | 0 0.000% | -2,950,000 (Position Closed) | Filing History |
| 2025-08-14 1:07 pm Sale | 2025-06-30 | 13G | Prothena Corporation plc PRTA | T. Rowe Price Associates, Inc. | 71,047 0.100% | -3,751,387 (-98.14%) | Filing History |
| 2025-08-13 4:14 pm Sale | 2025-06-30 | 13G | Prothena Corporation plc PRTA | SCULLY WILLIAM P | 5,351,846 9.900% | -255,902 (-4.56%) | Filing History |
| 2025-08-13 4:00 pm Sale | 2025-06-30 | 13G | Prothena Corporation plc PRTA | Fennell Todd W. | 4,350,846 8.100% | -239,959 (-5.23%) | Filing History |
| 2025-06-05 7:43 pm Sale | 2025-05-30 | 13G | Prothena Corporation plc PRTA | Wellington Management Group LLP | 108,208 0.200% | -5,022,668 (-97.89%) | Filing History |
| 2025-06-04 5:18 pm Purchase | 2025-05-29 | 13G | Prothena Corporation plc PRTA | Logos Global Management LP | 2,950,000 5.500% | 2,950,000 (New Position) | Filing History |
| 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 History |
| 2025-05-15 10:00 am Sale | 2025-03-31 | 13G | Prothena Corporation plc PRTA | Fennell Todd W. | 4,590,805 8.500% | -54,342 (-1.17%) | Filing History |
| 2025-05-14 10:34 am Purchase | 2025-03-31 | 13G | Prothena Corporation plc PRTA | SCULLY WILLIAM P | 5,607,748 10.400% | 49,458 (+0.89%) | Filing History |
| 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 History |
| 2025-02-21 2:49 pm Purchase | 2024-12-31 | 13G | Prothena Corporation plc PRTA | SCULLY WILLIAM P | 5,558,290 10.300% | 1,522,150 (+37.71%) | Filing History |
| 2025-02-14 3:35 pm Purchase | 2024-12-31 | 13G | Prothena Corporation plc PRTA | Fennell Todd W. | 4,645,147 8.600% | 1,476,320 (+46.59%) | Filing History |
| 2025-02-10 10:25 am Purchase | 2024-12-31 | 13G | Prothena Corporation plc PRTA | Wellington Management Group LLP | 5,130,876 9.500% | 952,088 (+22.78%) | Filing History |
| 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 History |
| 2024-11-14 1:22 pm Sale | 2024-09-30 | 13G | Prothena Corporation plc PRTA | T. Rowe Price Associates, Inc. | 3,822,434 7.100% | -420,576 (-9.91%) | Filing History |