Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.
| Filed | Form | Filer | Stake | Shares | Intent | |
|---|---|---|---|---|---|---|
| 2026-06-04 | SCHEDULE 13G | Casdin Capital, LLC | — | — | view → | |
| 2026-05-22 | SCHEDULE 13D/A | Casdin Capital, LLC | 9.70% | 4,757,165 | view → | |
| 2025-08-13 | SCHEDULE | Casdin Capital, LLC | 15.00% | 7,207,165 | view → | |
| 2021-07-21 | SC | GIRSCHWEILER THOMAS | — | — | view → | |
| 2021-07-21 | SC | VILLIGER WALTER | — | — | view → | |
| 2020-07-24 | SC | GIRSCHWEILER THOMAS | — | — | view → | |
| 2020-07-24 | SC | VILLIGER WALTER | — | — | view → | |
| 2019-06-03 | SC | VILLIGER WALTER | — | — | view → | |
| 2018-05-02 | SC | GIRSCHWEILER THOMAS | — | — | view → |
| Settlement | Short Interest | Days to Cover | % Δ vs prior |
|---|---|---|---|
| 2026-07-15 | 2,856,425 | 4.97 | -5.2% |
| 2026-06-30 | 3,013,891 | 2.01 | -16.9% |
| 2026-06-15 | 3,625,070 | 4.93 | -8.8% |
| 2026-05-29 | 3,975,144 | 4.30 | +5.3% |
| 2026-05-15 | 3,775,495 | 10.72 | +4.1% |
| 2026-04-30 | 3,627,907 | 9.15 | +9.0% |
| 2026-04-15 | 3,329,098 | 10.49 | -7.5% |
| 2026-03-31 | 3,599,500 | 8.94 | +16.0% |
| 2026-03-13 | 3,101,825 | 4.85 | +3.5% |
| 2026-02-27 | 2,996,816 | 7.69 | -6.7% |
| 2026-02-13 | 3,213,301 | 7.18 | +10.0% |
| 2026-01-30 | 2,921,620 | 9.76 | +3.2% |
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