William P. Scully, 10% Owner at PROTHENA CORP PUBLIC LTD CO (PRTA), bought 37,500 shares at $8.62 ($323K) on 2026-08-07, disclosed to the SEC on 2026-08-10.
Open-market purchase of $323k PRTA by 10% Owner. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history). Context: insider career grade D.
Negative factors outweigh the positive ones.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $8.62 | 3,500 | $30K | 9.3% |
| 2 | $8.62 | 34,000 | $293K | 90.7% |
| Total | $8.62 avg | 37,500 | $323K | 100% |
| Filing → |
| PRTA | BUY | 2026-06-12 | $1.0M | — | Filing → |
| PRTA | BUY | 2026-06-05 | $465K | — | Filing → |
| PRTA | BUY | 2026-06-03 | $471K | — | Filing → |