Ownership Summary
Karyopharm Therapeutics Inc. (NASDAQ:KPTI) has 68 institutional investors that have filed 13F reports for the period ending December 2025.
- Their combined ownership stood at 92.3% of outstanding shares in December 2025, up from 33.8% in September 2025.
- Their total shares held in KPTI increased 251.8% quarter over quarter, and separately, investors owning Karyopharm Therapeutics stayed flat from a year ago.
- During the quarter, 47 of these 68 funds increased positions in KPTI, 4 reduced exposure, and 17 held steady.
- Altogether, these fund groups held 10.09Mn shares in KPTI by December 2025, up by 7.22Mn shares quarter on quarter, and with no net change year over year.
- As of December 31, 2025, the biggest holder of Karyopharm Therapeutics is Birchview Capital, LP at 83.95K shares, representing 0.77% of shares outstanding.
- The biggest buyers of Karyopharm Therapeutics for the quarter ending December 2025 included Birchview Capital, LP (83.95K).
- Business Quant data shows the 1 biggest positions in Karyopharm Therapeutics as of December 2025 are held by Birchview Capital, LP (83.95K).