Sarissa Capital Management LP is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q4 2025, the fund manages $223M in reported equity holdings across 9 positions. The largest holdings are INFY (25.3%), IRWD (24.1%), NBIX (19.3%), CYTK (11.3%), AMRN (10.5%). The portfolio is concentrated in Other (100.0%). Data sourced from SEC EDGAR 13F filings (CIK 1577524).