Arthur W. Homan, 10% Owner at PROTHENA CORP PUBLIC LTD CO (PRTA), bought 110,000 shares at $8.35 ($920K) on 2026-10-13, disclosed to the SEC on 2026-10-15.
Open-market purchase of $920k 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 | $8.35 | 100,000 | $835K | 90.8% |
| 2 | $8.46 | 10,000 | $85K | 9.2% |
| Total | $8.36 avg | 110,000 | $920K | 100% |
| Filing → |
| PRTA | BUY | 2026-10-06 | $857K | — | Filing → |
| PRTA | BUY | 2026-09-30 | $1.4M | — | Filing → |
| PRTA | BUY | 2026-09-29 | $890K | — | Filing → |