PRTA PROTHENA CORP PUBLIC LTD CO Insider Trading

10% Owner William P Scully bought 50,000 PRTA shares at $9.43; stock down -24.7% from 52-week high, revenue collapsed -92.8% YoY

William P Scully, a 10% owner, purchased 50,000 shares at $9.43 on 2026-06-02, increasing his holdings by 50,000 shares to 886,000 shares. The timing follows significant recent downside: the stock is -24.7% from its 52-week high of $11.80 and down -17.6% over 30 days. However, his prior purchases at PRTA show a consistent pattern of underperformance at the 90-day mark: all 5 prior buys at this ticker declined or stalled by 90 days (ranging from -22.3% to -4.7%), with 0 of 5 well-timed at that horizon. Most critically, the company's fundamentals are deteriorating sharply: annual revenue growth of -92.8% year-over-year and full-year net income was negative, despite the latest quarter reporting $51.1M revenue and $32.7M net income. This disconnect—between recent quarterly profitability and full-year losses, combined with the deep revenue collapse—suggests structural headwinds that merit investor scrutiny.

10% owner Scully buys 100,000 shares at $9.81; stock down 8.9% in 30 days, 0 of 5 prior PRTA buys were 90-day profitable.

William P Scully, a 10% owner, purchased 100,000 shares at $9.81 on 2026-05-22, increasing his holdings from 736,000 to 836,000 shares. The transaction occurred near the upper end of the 52-week range ($4.32–$11.80), only 17.0% below the 52-week high. However, the stock has declined 8.9% in the 30 days following the trade. His prior trading pattern at PRTA is notably unfavorable: across 5 previous buys at this ticker, none showed positive returns at the 90-day mark, with outcomes ranging from -4.7% to -22.3%. His cross-ticker track record shows an average 90-day return of -11.5% across 6 prior buys (win rate 0.00%). Recent fundamentals show the company reported a net loss over its most recent full fiscal year despite a $32.7M gain in the latest quarter, paired with a dramatic 92.8% decline in annual revenue growth.