Sarissa Capital Management LP is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q1 2026, the fund manages $158M in reported equity holdings across 9 positions. The largest holdings are INFY (31.5%), IRWD (20.5%), AMRN (15.3%), NBIX (9.7%), CYTK (9.6%). The portfolio is concentrated in Other (100.0%). Data sourced from SEC EDGAR 13F filings (CIK 1577524).