Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.
| Filed | Form | Filer | Stake | Shares | Intent | |
|---|---|---|---|---|---|---|
| 2026-05-29 | SCHEDULE 13G | Farallon Capital Partners, L.P. | — | — | view → | |
| 2026-04-02 | SCHEDULE 13D/A | VIKING GLOBAL INVESTORS LP | 6.10% | 11,842,434 | view → | |
| 2025-07-01 | SCHEDULE | VIKING GLOBAL INVESTORS LP | 9.80% | 18,602,920 | view → | |
| 2025-05-14 | SCHEDULE | KKR Genetic Disorder L.P. | 7.00% | 13,260,971 | view → | |
| 2025-03-07 | SCHEDULE | KKR Genetic Disorder L.P. | 10.10% | 19,260,971 | view → | |
| 2025-01-31 | SCHEDULE | VIKING GLOBAL INVESTORS LP | 11.70% | 22,055,375 | view → | |
| 2023-07-20 | SC | VIKING GLOBAL INVESTORS LP | — | — | view → | |
| 2021-01-26 | SC | Eidos Therapeutics, Inc. | — | — | view → | |
| 2020-06-01 | SC | KKR Genetic Disorder L.P. | — | — | view → |
| Settlement | Short Interest | Days to Cover | % Δ vs prior |
|---|---|---|---|
| 2026-05-29 | 24,391,359 | 9.60 | +0.9% |
| 2026-05-15 | 24,163,037 | 8.73 | +0.6% |
| 2026-04-30 | 24,026,982 | 7.59 | +6.0% |
| 2026-04-15 | 22,676,856 | 13.68 | -3.0% |
| 2026-03-31 | 23,366,752 | 14.73 | -0.6% |
| 2026-03-13 | 23,505,637 | 8.95 | +7.0% |
| 2026-02-27 | 21,964,843 | 6.98 | +3.8% |
| 2026-02-13 | 21,167,249 | 5.65 | +5.9% |
| 2026-01-30 | 19,980,855 | 7.14 | +8.8% |
| 2026-01-15 | 18,370,031 | 5.91 | +6.7% |
| 2025-12-31 | 17,211,114 | 10.19 | -8.4% |
| 2025-12-15 | 18,793,079 | 10.18 | -3.0% |
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