William P Scully, 10% owner at Prothena Corp Public, bought PRTA on Aug 20, 2026
Data as of Oct 16
- Traded
- Aug 20, 2026
- Disclosed
- Aug 21, 2026
- Filed
- 1 day after the trade
Form 4s are due within two business days.
Official filing (SEC Form 4) ↗
The price around the disclosure
PRTA since disclosure
−11.6%
Similar stocks (XLV) since disclosure
+1.2%
XLV — its sector index fund
Change in closing price from Aug 21, 2026 (the first trading day on or after disclosure) to Oct 16, 2026. Dividends excluded. Not a return anyone earned.
Our take
None of our tested rules fired on this trade.