PROTHENA CORP PUBLIC LTD CO insider trading
PRTA$8.27-0.09 (-1.08% today)
“Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise.”
Insider Trading vs Stock Price
Insider Trading vs Stock Price data
Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (-16.1%). 0 insider transactions plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Open market purchase
Open market sellNet dollar flow · Buy / Sell balance
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Insider activity
Fromto
| Company | Insider / role | Action | ΔOwn | Avg price | Amount | ||
|---|---|---|---|---|---|---|---|
| PRTA | William P. Scully | Open market purchase$1.41M | +13.9% | $8.68 | $1.41M | Sep 29, 2026 | Sep 30, 2026 |
| PRTA | William P. Scully | Open market purchase$890K | +9.7% | $8.60 | $890K | Sep 28, 2026 | Sep 29, 2026 |
| PRTA | William P. Scully | Open market purchase$843K | +10.4% | $8.43 | $843K | Sep 18, 2026 | Sep 21, 2026 |
| PRTA | William P. Scully | Open market purchase$256K | +2.9% | $9.47 | $256K | Sep 2, 2026 | Sep 3, 2026 |
| PRTA | William P. Scully | Open market purchase$439K | +5.7% | $8.79 | $439K | Aug 20, 2026 | Aug 21, 2026 |
| PRTA | William P. Scully | Open market purchase$30.2K | +0.4% | $8.62 | $30.2K | Aug 7, 2026 | Aug 10, 2026 |
| PRTA | William P. Scully | Open market purchase$293K | +3.8% | $8.62 | $293K | Aug 7, 2026 | Aug 10, 2026 |
| PRTA | Anne Evans Kingston | Open market sell$64.9K | -12.1% | $8.47 | $64.9K | Jul 29, 2026 | Jul 30, 2026 |
| PRTA | Michael John Isaacs | Open market sell$71.1K | -19.0% | $8.47 | $71.1K | Jul 29, 2026 | Jul 30, 2026 |
| PRTA | William P. Scully | Open market purchase$158K | +2.3% | $7.90 | $158K | Jun 16, 2026 | Jun 18, 2026 |
| PRTA | William P. Scully | Open market purchase$1.02M | +11.7% | $8.17 | $1.02M | Jun 11, 2026 | Jun 12, 2026 |
| PRTA | William P. Scully | Open market purchase$466K | +4.9% | $9.31 | $466K | Jun 4, 2026 | Jun 5, 2026 |
| PRTA | William P. Scully | Open market purchase$472K | +5.2% | $9.43 | $472K | Jun 2, 2026 | Jun 3, 2026 |
| PRTA | William P. Scully | Open market purchase$981K | +11.5% | $9.81 | $981K | May 22, 2026 | May 26, 2026 |