PROTHENA CORP PUBLIC LTD CO
On October 6, 2026, 91 insider transactions were reported. Berkshire Hathaway bought 842,753 LENNAR CORP shares for $67.45M. BORR DRILLING LTD's Tor Olav Troim bought 1.5M shares. ANTERIS TECHNOLOGIES GLOBAL CORP's L1 Capital bought 648,455 shares. ACCELEVATION HOLDINGS CORP's CEO bought 200,000 shares. PROTHENA CORP's William P Scully bought 100,000 shares.
SCULLY WILLIAM P purchased 100,000 indirectly-held shares of PROTHENA CORP PUBLIC LTD CO (PRTA) at $8.57 ($0.86M total) on 2026-10-02.
Prothena announced that Chad J. Swanson, Ph.D., will resign as Chief Development Officer effective October 9, 2026, to join a strategic partner. The company did not disclose a replacement.
Over the past 7 days, AlphAI's AI scored 3 news stories mentioning PRTA (PROTHENA CORP PUBLIC LTD CO). Coverage has been balanced: 1 bullish, 1 neutral, and 1 bearish.
Recent PRTA coverage spans insider activity, financial news and corporate actions.
In the last 30 days, PRTA insiders filed 4 SEC Form 4 transactions — 4 purchases ($4.0M) and no sales. The most active reporter was SCULLY WILLIAM P with 4 filings.
May generate modest bullish bias for PRTA.
Insider buying may signal positive outlook, modest upward pressure on the stock.
The resignation may cause short-term uncertainty and modest sell pressure.
The departure of a senior R&D executive may raise concerns about pipeline continuity and could weigh on the stock.
Insider purchase by a major shareholder may signal confidence and could support the stock price.
AlphAI scores every news story that mentions PRTA with an AI model for sentiment and relevance, and aggregates insider trades from PROTHENA CORP PUBLIC LTD CO's SEC EDGAR Form 4 filings. Figures refresh continuously.
On October 6, 2026, 91 insider transactions were reported. Berkshire Hathaway bought 842,753 LENNAR CORP shares for $67.45M. BORR DRILLING LTD's Tor Olav Troim bought 1.5M shares. ANTERIS TECHNOLOGIES GLOBAL CORP's L1 Capital bought 648,455 shares. ACCELEVATION HOLDINGS CORP's CEO bought 200,000 shares. PROTHENA CORP's William P Scully bought 100,000 shares.
2 min readSCULLY WILLIAM P purchased 100,000 indirectly-held shares of PROTHENA CORP PUBLIC LTD CO (PRTA) at $8.57 ($0.86M total) on 2026-10-02.
1 min readProthena announced that Chad J. Swanson, Ph.D., will resign as Chief Development Officer effective October 9, 2026, to join a strategic partner. The company did not disclose a replacement.
1 min readPROTHENA CORP PUBLIC LTD CO (PRTA) filed an SEC Form 8-K — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers. Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On October 2, 2026, Chad J. Swanson, Ph.D., Chief Development Officer of Prothena Corporation plc (the “Company”) notified
1 min readSCULLY WILLIAM P purchased 162,000 indirectly-held shares of PROTHENA CORP PUBLIC LTD CO (PRTA) at $8.68 ($1.41M total) on 2026-09-29.
1 min readSCULLY WILLIAM P purchased 103,500 indirectly-held shares of PROTHENA CORP PUBLIC LTD CO (PRTA) at $8.60 ($0.89M total) on 2026-09-28.
1 min readOn September 24, 2026, insiders made notable stock purchases: CAPSOVISION ($CV) insider bought 878,735 shares for $5M; NAYAX ($NYAX) CEO bought 104,511 shares for $4.6M; UXIN ($UXIN) insider bought 104.9M shares for $996K; PROTHENA ($PRTA) insider bought 100,000 shares for $843K; BRADESCO ($BBD) executive bought 43,620 shares for $784K.
2 min readSCULLY WILLIAM P purchased 100,000 shares of PROTHENA CORP PUBLIC LTD CO (PRTA) at $8.43 ($0.84M total) on 2026-09-18.
1 min readSCULLY WILLIAM P purchased 27,000 shares of PROTHENA CORP PUBLIC LTD CO (PRTA) at $9.47 ($0.26M total) on 2026-09-02.
1 min readSCULLY WILLIAM P purchased 50,000 shares of PROTHENA CORP PUBLIC LTD CO (PRTA) at $8.79 ($0.44M total) on 2026-08-20.
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