Walker Karin L insider trades
Walker Karin L has filed 25 Form 4s with the SEC that we hold, for Prothena Corp Public LTD Co (PRTA) (Chief Accounting Officer) and Bio Green Med Solution, Inc. (CYCC) (Director). Across all of them we count 0 purchases worth $0 and 33 sales worth $7.2M reported on Form 4. None of these purchases or sales is dated in the last 12 months. The largest single trade was a sale of 19,115 shares of Prothena Corp Public LTD Co worth $1.1M, dated 2021-10-20. The first filing on our record is dated 2021-10-22 and the latest 2026-07-30.
Prothena Corp Public LTD Co (PRTA)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-10-20 | S, sale reported on Form 4 | 1,700 | $103.5K | 2021-10-22 |
| 2021-10-20 | S, sale reported on Form 4 | 2,185 | $135.3K | 2021-10-22 |
| 2021-10-20 | S, sale reported on Form 4 | 19,115 | $1.1M | 2021-10-22 |
| 2021-11-23 | S, sale reported on Form 4 | 2,700 | $155.3K | 2021-11-26 |
| 2021-11-23 | S, sale reported on Form 4 | 1,819 | $106.3K | 2021-11-26 |
| 2022-10-24 | S, sale reported on Form 4 | 7,907 | $445.9K | 2022-10-26 |
| 2022-10-24 | S, sale reported on Form 4 | 7,144 | $409.6K | 2022-10-26 |
| 2022-10-24 | S, sale reported on Form 4 | 3,785 | $220.5K | 2022-10-26 |
| 2022-10-24 | S, sale reported on Form 4 | 1,164 | $68.7K | 2022-10-26 |
| 2022-11-18 | S, sale reported on Form 4 | 226 | $13.2K | 2022-11-18 |
| 2022-11-18 | S, sale reported on Form 4 | 9,774 | $557.5K | 2022-11-18 |
| 2023-03-15 | S, sale reported on Form 4 | 10,569 | $514.3K | 2023-03-17 |
| 2023-03-15 | S, sale reported on Form 4 | 9,431 | $454.0K | 2023-03-17 |
| 2023-03-20 | S, sale reported on Form 4 | 3,903 | $185.4K | 2023-03-22 |
| 2023-03-20 | S, sale reported on Form 4 | 1,097 | $53.2K | 2023-03-22 |
| 2023-04-19 | S, sale reported on Form 4 | 2,083 | $110.9K | 2023-04-21 |
| 2023-04-19 | S, sale reported on Form 4 | 2,917 | $153.6K | 2023-04-21 |
| 2023-05-19 | S, sale reported on Form 4 | 2,823 | $207.9K | 2023-05-19 |
| 2023-05-19 | S, sale reported on Form 4 | 2,177 | $162.1K | 2023-05-19 |
| 2023-06-20 | S, sale reported on Form 4 | 529 | $37.0K | 2023-06-20 |
| 2023-06-20 | S, sale reported on Form 4 | 2,471 | $171.7K | 2023-06-20 |
| 2023-06-20 | S, sale reported on Form 4 | 2,000 | $135.8K | 2023-06-20 |
| 2023-07-19 | S, sale reported on Form 4 | 1,034 | $72.5K | 2023-07-19 |
| 2023-07-19 | S, sale reported on Form 4 | 3,966 | $273.5K | 2023-07-19 |
| 2023-08-18 | S, sale reported on Form 4 | 5,000 | $285.9K | 2023-08-18 |
| 2023-09-19 | S, sale reported on Form 4 | 5,000 | $261.8K | 2023-09-19 |
| 2023-10-25 | S, sale reported on Form 4 | 1,789 | $72.0K | 2023-10-25 |
| 2023-10-25 | S, sale reported on Form 4 | 294 | $12.4K | 2023-10-25 |
| 2023-10-25 | S, sale reported on Form 4 | 2,917 | $120.7K | 2023-10-25 |
| 2023-11-30 | S, sale reported on Form 4 | 5,000 | $170.0K | 2023-11-30 |
| 2023-12-20 | S, sale reported on Form 4 | 1,678 | $61.5K | 2023-12-20 |
| 2023-12-20 | S, sale reported on Form 4 | 3,322 | $124.4K | 2023-12-20 |
| 2024-01-24 | S, sale reported on Form 4 | 5,000 | $170.0K | 2024-01-24 |
Bio Green Med Solution, Inc. (CYCC)
No purchase or sale of common stock reported here; these filings cover grants, option exercises or other codes.
Counted from the Form 4 filings this reporting owner (SEC CIK 1559422) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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