PROTHENA CORP PUBLIC LTD CO ($PRTA) Insider Transactions

Last updated: 2026-03-14 11:56 UTC | Total transactions: 70

In the last 12 months, insiders at PROTHENA CORP PUBLIC LTD CO ($PRTA) filed 70 transactions with the SEC: 6 open-market purchases totaling $2,749,916 and 4 sales totaling $51,009,807. Net insider sentiment: net selling.

PROTHENA CORP PUBLIC LTD CO operates in the Pharmaceutical preparations industry (Life sciences sector).

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View all SEC Filings for PROTHENA CORP PUBLIC LTD CO (PRTA).

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Recent Insider Transactions

Transaction Date Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
March 3, 2026 Walker Karin L Chief Accounting Officer A Stock Option (Right to Buy) 150000 $0.00 150,000.0000 53,830,000 9999.99% 0.28%
March 3, 2026 Zago Wagner M. Chief Scientific Officer A Stock Option (Right to Buy) 190000 $0.00 190,000.0000 53,830,000 9999.99% 0.35%
March 3, 2026 Kinney Gene G. President and CEO A Stock Option (Right to Buy) 520000 $0.00 520,000.0000 53,830,000 9999.99% 0.97%
March 3, 2026 Malecek Michael J Chief Legal Officer A Stock Option (Right to Buy) 190000 $0.00 190,000.0000 53,830,000 9999.99% 0.35%
March 3, 2026 Nguyen Tran Chief Strategy Officer and CFO A Stock Option (Right to Buy) 230000 $0.00 230,000.0000 53,830,000 9999.99% 0.43%
March 3, 2026 Smith Brandon S. Chief Operating Officer A Stock Option (Right to Buy) 190000 $0.00 190,000.0000 53,830,000 9999.99% 0.35%
March 3, 2026 Swanson Chad J. Chief Development Officer A Stock Option (Right to Buy) 190000 $0.00 190,000.0000 53,830,000 9999.99% 0.35%
July 28, 2025 Walker Karin L Chief Accounting Officer A Ordinary Shares, par value $0.01 per share 25000 $0.00 25,000.0000 53,772,000 9999.99% 0.05%
July 28, 2025 Kinney Gene G. President and CEO A Ordinary Shares, par value $0.01 per share 140000 $0.00 152,793.0000 53,772,000 1094.35% 0.26%
July 28, 2025 Malecek Michael J Chief Legal Officer A Ordinary Shares, par value $0.01 per share 80000 $0.00 80,000.0000 53,772,000 9999.99% 0.15%
July 28, 2025 Zago Wagner M. Chief Scientific Officer A Ordinary Shares, par value $0.01 per share 85000 $0.00 85,000.0000 53,772,000 9999.99% 0.16%
July 28, 2025 Nguyen Tran Chief Strategy Officer and CFO A Ordinary Shares, par value $0.01 per share 95000 $0.00 97,205.0000 53,772,000 4308.39% 0.18%
July 28, 2025 Smith Brandon S. Chief Operating Officer A Ordinary Shares, par value $0.01 per share 130000 $0.00 130,000.0000 53,772,000 9999.99% 0.24%
July 28, 2025 Swanson Chad J. Chief Development Officer A Ordinary Shares, par value $0.01 per share 85000 $0.00 85,000.0000 53,772,000 9999.99% 0.16%
May 14, 2025 WELCH DANIEL G Not found A Stock Option (Right to Buy) 20183 $0.00 20,183.0000 53,772,000 9999.99% 0.04%
May 14, 2025 Selkoe Dennis J. Not found A Stock Option (Right to Buy) 20183 $0.00 20,183.0000 53,772,000 9999.99% 0.04%
May 14, 2025 Kim Helen Susan Not found A Stock Option (Right to Buy) 20183 $0.00 20,183.0000 53,772,000 9999.99% 0.04%
May 14, 2025 Ekman Lars Not found A Stock Option (Right to Buy) 20183 $0.00 20,183.0000 53,772,000 9999.99% 0.04%
May 14, 2025 Dunn William H. Jr. Not found A Stock Option (Right to Buy) 20183 $0.00 20,183.0000 53,772,000 9999.99% 0.04%
May 14, 2025 Cooke Shane Not found A Stock Option (Right to Buy) 20183 $0.00 20,183.0000 53,772,000 9999.99% 0.04%
May 14, 2025 COLLIER RICHARD T Not found A Stock Option (Right to Buy) 20183 $0.00 20,183.0000 53,772,000 9999.99% 0.04%
May 14, 2025 Cobb Paula K Not found A Stock Option (Right to Buy) 20183 $0.00 20,183.0000 53,772,000 9999.99% 0.04%
May 6, 2025 EcoR1 Capital, LLC TenPercentOwner S Ordinary Shares 1984053 $7.64 5,304,596.0000 53,772,000 27.22% 3.69%
May 5, 2025 EcoR1 Capital, LLC TenPercentOwner S Ordinary Shares 977693 $8.11 7,288,649.0000 53,772,000 11.83% 1.82%
May 2, 2025 EcoR1 Capital, LLC TenPercentOwner S Ordinary Shares 3317938 $8.36 8,266,342.0000 53,772,000 28.64% 6.17%
Dec. 31, 2024 SCULLY WILLIAM P Not found P Ordinary Shares, par value $0.01 per share 30000 $12.99 841,143.0000 53,790,000 3.70% 0.06%
Jan. 2, 2025 SCULLY WILLIAM P Not found G Ordinary Shares, par value $0.01 per share 13200 $0.00 827,943.0000 53,772,000 1.57% 0.02%
Jan. 3, 2025 SCULLY WILLIAM P Not found G Ordinary Shares, par value $0.01 per share 1000 $0.00 826,943.0000 53,772,000 0.12% 0.00%
Jan. 14, 2025 SCULLY WILLIAM P Not found P Ordinary Shares, par value $0.01 per share 100000 $12.79 926,943.0000 53,772,000 12.09% 0.19%
Dec. 20, 2024 SCULLY WILLIAM P Not found G Ordinary Shares, par value $0.01 per share 40000 $0.00 938,943.0000 53,790,000 4.09% 0.07%
Dec. 20, 2024 SCULLY WILLIAM P Not found G Ordinary Shares, par value $0.01 per share 500 $0.00 809,143.0000 53,790,000 0.06% 0.00%
Dec. 20, 2024 SCULLY WILLIAM P Not found P Ordinary Shares, par value $0.01 per share 2000 $15.91 809,643.0000 53,790,000 0.25% 0.00%
Dec. 19, 2024 SCULLY WILLIAM P Not found G Ordinary Shares, par value $0.01 per share 681000 $0.00 807,643.0000 53,790,000 45.75% 1.27%
Dec. 18, 2024 SCULLY WILLIAM P Not found P Ordinary Shares, par value $0.01 per share 73436 $13.93 1,488,643.0000 53,790,000 5.19% 0.14%
Dec. 18, 2024 SCULLY WILLIAM P Not found G Ordinary Shares, par value $0.01 per share 430000 $0.00 1,415,207.0000 53,790,000 43.65% 0.80%
Jan. 15, 2025 SCULLY WILLIAM P Not found G Ordinary Shares, par value $0.01 per share 12000 $0.00 926,943.0000 53,772,000 1.28% 0.02%
Dec. 31, 2024 SCULLY WILLIAM P Not found P Ordinary Shares, par value $0.01 per share 1200 $13.37 810,343.0000 53,790,000 0.15% 0.00%
Dec. 31, 2024 SCULLY WILLIAM P Not found P Ordinary Shares, par value $0.01 per share 800 $13.39 811,143.0000 53,790,000 0.10% 0.00%
March 5, 2025 Nguyen Tran Chief Strategy Officer and CFO A Stock Option (Right to Buy) 107500 $0.00 107,500.0000 53,772,000 9999.99% 0.20%
March 5, 2025 Zago Wagner M. Chief Scientific Officer A Stock Option (Right to Buy) 107500 $0.00 107,500.0000 53,772,000 9999.99% 0.20%
March 5, 2025 Walker Karin L Chief Accounting Officer A Stock Option (Right to Buy) 70000 $0.00 70,000.0000 53,772,000 9999.99% 0.13%
March 5, 2025 Swanson Chad J. Chief Development Officer A Stock Option (Right to Buy) 107500 $0.00 107,500.0000 53,772,000 9999.99% 0.20%
March 5, 2025 Smith Brandon S. Chief Operating Officer A Stock Option (Right to Buy) 107500 $0.00 107,500.0000 53,772,000 9999.99% 0.20%
March 5, 2025 Malecek Michael J Chief Legal Officer A Stock Option (Right to Buy) 107500 $0.00 107,500.0000 53,772,000 9999.99% 0.20%
March 5, 2025 Kinney Gene G. President and CEO A Stock Option (Right to Buy) 375000 $0.00 375,000.0000 53,772,000 9999.99% 0.70%
March 5, 2025 Karp Carol D. Chief Regulatory Officer A Stock Option (Right to Buy) 107500 $0.00 107,500.0000 53,772,000 9999.99% 0.20%
March 5, 2025 Ford David A Chief People Officer A Stock Option (Right to Buy) 107500 $0.00 107,500.0000 53,772,000 9999.99% 0.20%
April 8, 2020 Nguyen Tran Chief Strategy Officer and CFO J Ordinary Shares, par value $0.01 per share 995 $0.00 2,205.0000 0 31.09% 0.00%
Oct. 1, 2024 Swanson Chad J. Chief Development Officer A Stock Option (Right to Buy) 40000 $0.00 40,000.0000 53,790,000 9999.99% 0.07%
May 15, 2024 Cobb Paula K Not found A Stock Option (Right to Buy) 15000 $0.00 15,000.0000 53,216,000 9999.99% 0.03%
May 15, 2024 Cooke Shane Not found A Stock Option (Right to Buy) 15000 $0.00 15,000.0000 53,216,000 9999.99% 0.03%
May 15, 2024 COLLIER RICHARD T Not found A Stock Option (Right to Buy) 15000 $0.00 15,000.0000 53,216,000 9999.99% 0.03%
May 15, 2024 Dunn William H. Jr. Not found A Stock Option (Right to Buy) 15000 $0.00 15,000.0000 53,216,000 9999.99% 0.03%
May 15, 2024 Ekman Lars Not found A Stock Option (Right to Buy) 15000 $0.00 15,000.0000 53,216,000 9999.99% 0.03%
May 15, 2024 Kim Helen Susan Not found A Stock Option (Right to Buy) 15000 $0.00 15,000.0000 53,216,000 9999.99% 0.03%
May 15, 2024 Selkoe Dennis J. Not found A Stock Option (Right to Buy) 15000 $0.00 15,000.0000 53,216,000 9999.99% 0.03%
May 15, 2024 WELCH DANIEL G Not found A Stock Option (Right to Buy) 15000 $0.00 15,000.0000 53,216,000 9999.99% 0.03%
March 1, 2024 Ford David A Chief People Officer A Stock Option (Right to Buy) 85000 $0.00 85,000.0000 53,216,000 9999.99% 0.16%
Feb. 27, 2024 Garren Hideki Chief Medical Officer A Stock Option (Right to Buy) 85000 $0.00 85,000.0000 53,216,000 9999.99% 0.16%
Feb. 27, 2024 Kinney Gene G. President and CEO A Stock Option (Right to Buy) 307000 $0.00 307,000.0000 53,216,000 9999.99% 0.58%
Feb. 27, 2024 Smith Brandon S. Chief Operating Officer A Stock Option (Right to Buy) 85000 $0.00 85,000.0000 53,216,000 9999.99% 0.16%
Feb. 27, 2024 Nguyen Tran Chief Strategy Officer and CFO A Stock Option (Right to Buy) 85000 $0.00 85,000.0000 53,216,000 9999.99% 0.16%
Feb. 27, 2024 Malecek Michael J Chief Legal Officer A Stock Option (Right to Buy) 85000 $0.00 85,000.0000 53,216,000 9999.99% 0.16%
Feb. 27, 2024 Karp Carol D. Chief Regulatory Officer A Stock Option (Right to Buy) 85000 $0.00 85,000.0000 53,216,000 9999.99% 0.16%
Feb. 27, 2024 Zago Wagner M. Chief Scientific Officer A Stock Option (Right to Buy) 85000 $0.00 85,000.0000 53,216,000 9999.99% 0.16%
Feb. 27, 2024 Walker Karin L Chief Accounting Officer A Stock Option (Right to Buy) 54000 $0.00 54,000.0000 53,216,000 9999.99% 0.10%
Feb. 21, 2024 WELCH DANIEL G Not found A Stock Option (Right to Buy) 132000 $0.00 132,000.0000 53,216,000 9999.99% 0.25%
Jan. 24, 2024 Walker Karin L Chief Accounting Officer M Ordinary Shares, par value $0.01 per share 5000 $13.53 5,000.0000 53,216,000 9999.99% 0.01%
Jan. 24, 2024 Walker Karin L Chief Accounting Officer S Ordinary Shares, par value $0.01 per share 5000 $34.00 0.0000 53,216,000 100.00% 0.01%
Jan. 24, 2024 Walker Karin L Chief Accounting Officer M Stock Option (Right to Buy) 5000 $0.00 15,000.0000 53,216,000 25.00% 0.01%