39 transactions on file (6 open-market purchases and 19 open-market sales).
19 open-market sales by KROS insiders, between Oct 15, 2025 and Aug 18, 2026.
Discretionary.
Planned (10b5-1).
Not stated.
The 6 open-market purchases on file carry no plan label.
| Date | Insider | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-08-18 | Tanini Annita Corp. Controller & VP, Finance Open-market sale Discretionary | Open-market sale Discretionary | −1,224 | $10.29 | −12.59K | 45,144 |
| 2026-08-18 | Lerner Lorena Raquel Chief Scientific Officer Open-market sale Discretionary | Open-market sale Discretionary | −3,568 | $10.29 | −36.71K | 27,559 |
| 2026-08-18 | Cho Esther Chief Legal Officer Open-market sale Discretionary | Open-market sale Discretionary | −4,485 | $10.29 | −46.15K | 35,770 |
| 2026-08-18 | Newton Charles W. Director Open-market sale Planned (10b5-1) | Open-market sale Planned (10b5-1) | −551 | $10.30 | −5.68K | 12,114 |
| 2026-08-17 | BIENAIME JEAN JACQUES Director Open-market purchase | Open-market purchase | +1,000 | $10.27 | +10.27K | 19,592 |
34 more transactions are on Measure
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| Insider | Role | On Sep 23, 2025 | Now | Change | Sold | Shape |
|---|---|---|---|---|---|---|
| Pontifax Management 4 G.P. (2015) Ltd.10% owner | 10% owner | 2,284,612 | 0 | −100.00% | $84.98M$84.98M no plan | |
| ADAR1 Capital Management, LLC10% owner | 10% owner | 4,391,237 | 0 | −100.00% | $95.66M$95.66M no plan | |
| Lerner Lorena RaquelChief Science Officer | Chief Science Officer | 35,000 | 27,559 | −21.26% | $100K$100K no plan |
9 more insiders are on Measure
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The assistant answers from what KROS has actually filed: 7 annual reports filed with the SEC, 39 Form 4 filings from the last year and 3 funds that hold it. Every figure in a reply links to the filing it came from, so an answer can be checked rather than believed.
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Source
From SEC Form 4 filings, filed within two business days of a transaction.
Past transactions say nothing about future ones, and none of this is investment advice.
What each insider held after every open-market trade, over the last twelve months.
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Every filingMeasure
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Each stake priced at the quarter it was filed, and diffed against the quarter before: how big a bet it is for them, and by how much it moved.
Every position, sizedMeasure
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Whether this is one decision or a pattern, and how it compares with KROS's own history of insider activity.
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The table above says who traded. This says what KROS did over the following 30, 90 and 180 days after each open-market purchase and sale, from this company’s own record rather than a study about companies in general, and with the number of transactions shown beside every average.
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