Karin L. Walker serves as Executive at Prothena Corp plc, where they oversee executive responsibilities. Since joining the company, Karin L. Walker has executed 109 insider transactions totaling $10.1M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jul 28, 2025 involved receiving (via award) 25,000 shares valued at $0.
Karin L. Walker currently holds 25,000 shares of Prothena Corp plc (PRTA), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Karin L. Walker has been a net seller of PRTA stock. They have purchased $0 and sold $10.1M worth of shares.
Karin L. Walker's most recent insider trade was on Jul 28, 2025, when they sold 25,000 shares at $0.00 per share.
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| $13.53 |
| Planned |
| Jan 24, 2024 | PRTA | $170.0K | Sale | 5,000 | $34.00 | Planned |
| Dec 20, 2023 | PRTA | $124.4K | Sale | 3,322 | $37.45 | Planned |
| Dec 20, 2023 | PRTA | $67.7K | Option Exercise | 5,000 | $13.53 | Planned |
| Dec 20, 2023 | PRTA | $61.5K | Sale | 1,678 | $36.68 | Planned |
| Nov 30, 2023 | PRTA | $67.7K | Option Exercise | 5,000 | $13.53 | Planned |
| Nov 30, 2023 | PRTA | $170.0K | Sale | 5,000 | $34.00 | Planned |
| Oct 25, 2023 | PRTA | $67.7K | Option Exercise | 5,000 | $13.53 | Planned |
| Oct 25, 2023 | PRTA | $120.7K | Sale | 2,917 | $41.38 | Planned |
| Oct 25, 2023 | PRTA | $12.4K | Sale | 294 | $42.28 | Planned |
| Oct 25, 2023 | PRTA | $72.0K | Sale | 1,789 | $40.27 | Planned |
| Sep 19, 2023 | PRTA | $261.8K | Sale | 5,000 | $52.36 | Planned |
| Sep 19, 2023 | PRTA | $75.2K | Option Exercise | 5,000 | $15.04 | Planned |
| Aug 18, 2023 | PRTA | $285.9K | Sale | 5,000 | $57.18 | Planned |
| Aug 18, 2023 | PRTA | $75.2K | Option Exercise | 5,000 | $15.04 | Planned |
| Jul 19, 2023 | PRTA | $75.2K | Option Exercise | 5,000 | $15.04 | Planned |
| Jul 19, 2023 | PRTA | $273.5K | Sale | 3,966 | $68.96 | Planned |
| Jul 19, 2023 | PRTA | $72.5K | Sale | 1,034 | $70.08 | Planned |
| Jun 30, 2023 | CYCC | $0 | Award | 21,219 | $N/A | Discretionary |
| Jun 20, 2023 | PRTA | $135.8K | Sale | 2,000 | $67.88 | Planned |
| Jun 20, 2023 | PRTA | $171.7K | Sale | 2,471 | $69.49 | Planned |
| Jun 20, 2023 | PRTA | $37.0K | Sale | 529 | $69.99 | Planned |
| Jun 20, 2023 | PRTA | $75.2K | Option Exercise | 5,000 | $15.04 | Planned |
| May 19, 2023 | PRTA | $75.2K | Option Exercise | 5,000 | $15.04 | Planned |
| May 19, 2023 | PRTA | $162.1K | Sale | 2,177 | $74.47 | Planned |
| May 19, 2023 | PRTA | $207.9K | Sale | 2,823 | $73.63 | Planned |
| Apr 19, 2023 | PRTA | $153.6K | Sale | 2,917 | $52.64 | Planned |
| Apr 19, 2023 | PRTA | $75.2K | Option Exercise | 5,000 | $15.04 | Planned |
| Apr 19, 2023 | PRTA | $110.9K | Sale | 2,083 | $53.25 | Planned |