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).
Most Active Insiders
- EcoR1 Capital, LLC (TenPercentOwner) — 3 transactions totaling $50,839,807
- SCULLY WILLIAM P (Not found) — 13 transactions totaling $2,749,916
- Walker Karin L (Chief Accounting Officer) — 7 transactions totaling $237,650
- Ford David A (Chief People Officer) — 2 transactions totaling $0
- Swanson Chad J. (Chief Development Officer) — 4 transactions totaling $0
View all SEC Filings for PROTHENA CORP PUBLIC LTD CO (PRTA).
Set Up your own filters →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% |