AlphaYouWP
Insider buying
William P Scully bought $439K of Prothena Corp Public Ltd Co (PRTA) stock
William P Scully, 10% owner of Prothena Corp Public Ltd Co (PRTA), bought 50,000 shares of PRTA stock worth $439K, per an SEC Form 4 filed Aug 21, 2026.
It was an open-market purchase.
The trade happened on Aug 20, 2026, 1 day before it was made public.
PRTA has moved -5.8% since the trade date, from $9.03 to $8.51 (Sep 21, 2026 close).
- Traded
- Aug 20, 2026
- Disclosed
- Aug 21, 2026
- Filing delay
- 1 day
- Price since
- -5.8%
- Role
- 10% owner
- Source
- SEC Form 4
More PRTA insider and Congress trades
From a public SEC Form 4, linked above. Not investment advice, and not a recommendation to buy or sell.