PRTA Insider Trading Activity and SEC Form 4 Filings
PRTA insider trading summary
Over the past 12 months, insiders at Prothena Corp Public Ltd Co (PRTA) reported 16 open-market purchases worth $9.8M by 1 insider and 2 sales worth $136K by 2 insiders on SEC Form 4. Net insider buying was $9.7M.
Latest PRTA insider buys and sells
| Date | Insider | Role | Type | Value |
|---|---|---|---|---|
| Oct 23, 2026 | William P Scully | 10% Owner | Buy | $404K (50,000 @ $8.07) |
| Oct 22, 2026 | William P Scully | 10% Owner | Buy | $819K (100,000 @ $8.19) |
| Oct 14, 2026 | William P Scully | 10% Owner | Buy | $85K (10,000 @ $8.46) |
| Oct 13, 2026 | William P Scully | 10% Owner | Buy | $835K (100,000 @ $8.35) |
| Oct 2, 2026 | William P Scully | 10% Owner | Buy | $857K (100,000 @ $8.57) |
| Sep 29, 2026 | William P Scully | 10% Owner | Buy | $1.4M (162,000 @ $8.68) |
| Sep 28, 2026 | William P Scully | 10% Owner | Buy | $890K (103,500 @ $8.60) |
| Sep 18, 2026 | William P Scully | 10% Owner | Buy | $843K (100,000 @ $8.43) |
| Sep 2, 2026 | William P Scully | 10% Owner | Buy | $256K (27,000 @ $9.47) |
| Aug 20, 2026 | William P Scully | 10% Owner | Buy | $439K (50,000 @ $8.79) |
Source: SEC Form 4 filings. Open-market purchases (code P) and sales (code S) only; option exercises, grants and gifts are excluded.