Trade Summary

5 days ago, SCULLY WILLIAM P, serving as 10% owner Owner at PROTHENA CORP PUBLIC LTD CO (PRTA), purchased 100,000 shares at $9.81 per share, for a total transaction value of $981,300.00. Following this transaction, SCULLY WILLIAM P now holds 836,000 shares of PRTA.

This purchase represents a 13.59% increase in SCULLY WILLIAM P's stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Friday, May 22, 2026 and publicly disclosed via SEC Form 4 filing on Tuesday, May 26, 2026 at 2:51 PM ET, 4 days after the trade was made.

PROTHENA CORP PUBLIC LTD CO operates in the HEALTHCARE sector, specifically within the BIOTECHNOLOGY industry. Insider buying activity in this sector can provide valuable signals about industry trends and company-specific developments.