AlphaYouWP
Insider buying
William P Scully bought $843K of Prothena Corp Public Ltd Co (PRTA) stock
William P Scully, 10% owner of Prothena Corp Public Ltd Co (PRTA), bought 100,000 shares of PRTA stock worth $843K, per an SEC Form 4 filed Sep 21, 2026.
It was an open-market purchase.
The trade happened on Sep 18, 2026, 3 days before it was made public.
PRTA has moved +4.8% since the trade date, from $8.58 to $8.99 (Sep 22, 2026 close).
- Traded
- Sep 18, 2026
- Disclosed
- Sep 21, 2026
- Filing delay
- 3 days
- Price since
- +4.8%
- 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.