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RA Capital boosts Karyopharm (KPTI) stake to 9.99% beneficial ownership cap
RA Capital Management, L.P. and its affiliated reporting persons have reported a 9.99% beneficial ownership stake in Karyopharm Therapeutics Inc. (KPTI) as of June 30, 2026. This stake, totaling 2,302,504 shares, is held through RA Capital Healthcare Fund, L.P., and is capped at 9.99% due to "Beneficial Ownership Blockers" in warrants. The filing, an amended passive investment disclosure …