RTW INVESTMENTS, LP is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q1 2026, the fund manages $10.0B in reported equity holdings across 88 positions. The largest holdings are MDGL (10.4%), INSM (7.9%), PTGX (5.3%), PTCT (5.3%), ARGX (5.2%). The portfolio is concentrated in Other (96.3%), Healthcare (3.7%). Data sourced from SEC EDGAR 13F filings (CIK 1493215).