Tara Nickerson, Chief Business Officer at Prothena Corp plc (PRTA), bought 1,656 shares at $21.00 ($35K) on 2014-05-12, disclosed to the SEC on 2014-05-12.
Open-market purchase of $35k PRTA by Chief Business Officer. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Something here stands out, but not much.
| Filing → |
| PRTA | SELL | 2015-12-11 | $662K | — | Filing → |
| PRTA | SELL | 2015-09-11 | $561K | — | Filing → |
| PRTA | SELL | 2015-06-09 | $533K | — | Filing → |