PRTA PROTHENA CORP PLC
FollowStock (common), issuer CIK 1559053
Filings received so far for Q3 2026: 4 13F filers report a position in PRTA shares at 2026-09-30. The quarter is not complete: its 13F deadline is 2026-11-14, and the counts grow as filings arrive.
13D and 13G filers
No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.
Insider trades
| Owner | Date | Shares | Price | Filing |
|---|---|---|---|---|
| SCULLY WILLIAM P10% owner | 2026-10-08 | +90,000 P | $8.5656 | Form 4 |
| SCULLY WILLIAM P10% owner | 2026-10-07 | +125,000 P | $8.4012 | Form 4 |
| SCULLY WILLIAM P10% owner | 2026-10-02 | +100,000 P | $8.5724 | Form 4 |
13F holders, Q3 2026
Filers in the available 13F reports with a share position at 2026-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.
| Holder | Shares | Value | % of portfolio | Change | Source |
|---|---|---|---|---|---|
| Versant Capital Management, Inc | 5,704 | $47.8K | <0.01% | +3,660 | 13F-HRTimeline |
| Farther Finance Advisors, LLC | 2,786 | $23.3K | <0.01% | +298 | 13F-HRTimeline |
| GAMMA Investing LLC | 2,246 | $18.8K | <0.01% | -342 | 13F-HRTimeline |
| CoreCap Advisors, LLC | 11 | $92 | <0.01% | 0 | 13F-HRTimeline |
Events
SCULLY WILLIAM P bought 215,000 PRTA shares between 2026-10-07 and 2026-10-08, Form 4 filed 2026-10-09. 0001045463-26-000020
Accepted , ingestedSCULLY WILLIAM P bought 100,000 PRTA shares on 2026-10-02, Form 4 filed 2026-10-06. 0001045463-26-000019
Accepted , ingested