Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.
| Filed | Form | Filer | Stake | Shares | Intent | |
|---|---|---|---|---|---|---|
| 2026-09-08 | SCHEDULE 13D/A | Venrock Healthcare Capital Partners III, L.P. | — | 0 | view → | |
| 2026-09-03 | SCHEDULE 13D/A | Fairmount Funds Management LLC | — | 0 | view → | |
| 2026-06-23 | SCHEDULE 13D/A | Fairmount Funds Management LLC | 9.99% | 6,713,519 | view → | |
| 2026-01-22 | SCHEDULE | Fairmount Funds Management LLC | 9.99% | 6,047,027 | view → | |
| 2025-10-14 | SCHEDULE | Fairmount Funds Management LLC | 9.99% | 5,776,881 | view → | |
| 2024-04-01 | SC | Fairmount Funds Management LLC | — | — | view → |
| Date | Insider | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-14 | Dambkowski Carl | officer | Gift | 8,000 | — | — |
| 2026-07-10 | HENDERSON MICHAEL THOMAS | director, officer | Gift | 75,046 | — | — |
| 2026-07-08 | HENDERSON MICHAEL THOMAS | director, officer | Sale | 20,000 | $133.63 | $2.67M |
| 2026-06-09 | Bollinger Lisa | director | Award | 7,657 | $85.00 | $651K |
| 2026-05-01 | Henderson Jane | officer | Sale | 811 | $81.02 | $66K |
| 2026-05-01 | Henderson Jane | officer | Sale | 900 | $82.60 | $74K |
| 2026-05-01 | Henderson Jane | officer | Sale | 289 | $83.16 | $24K |
| 2026-04-08 | HENDERSON MICHAEL THOMAS | director, officer | Sale | 17,800 | $82.48 | $1.47M |
| 2026-04-08 | HENDERSON MICHAEL THOMAS | director, officer | Sale | 2,000 | $83.26 | $167K |
| 2026-04-08 | HENDERSON MICHAEL THOMAS | director, officer | Sale | 200 | $85.00 | $17K |
| Settlement | Short Interest | Days to Cover | % Δ vs prior |
|---|---|---|---|
| 2026-08-31 | 4,203,052 | 3.47 | -1.6% |
| 2026-08-14 | 4,273,438 | 3.23 | +1.3% |
| 2026-07-31 | 4,217,209 | 4.03 | +2.0% |
| 2026-07-15 | 4,133,296 | 2.37 | -19.9% |
| 2026-06-30 | 5,161,455 | 1.00 | -50.7% |
| 2026-06-15 | 10,477,522 | 10.31 | -0.5% |
| 2026-05-29 | 10,526,394 | 9.36 | +12.3% |
| 2026-05-15 | 9,371,143 | 15.85 | -1.3% |
| 2026-04-30 | 9,489,537 | 14.29 | -0.8% |
| 2026-04-15 | 9,567,729 | 15.53 | -1.7% |
| 2026-03-31 | 9,729,380 | 6.07 | +10.6% |
| 2026-03-13 | 8,798,347 | 9.96 | +2.1% |
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