Terminal · Institutions
Every 13F-reported equity position this quarter, with its quarter-over-quarter change — each row traces back to the SEC filing.
Every 13F-reported equity position this quarter, with its quarter-over-quarter change — each row traces back to the SEC filing.
RTW INVESTMENTS, LP (CIK 1493215) reported $10.05B across 81 reported positions in its SEC 13F filing for 2026-03-31. Largest positions: MDGL ($1.04B, 10.38%), INSM ($791.9M, 7.88%), PTGX ($533.2M, 5.31%), PTCT ($527.8M, 5.25%), ARGX ($518.1M, 5.16%). Source: SEC Form 13F.
| Rank | Ticker | Company | Value | % Portfolio | Shares | Action |
|---|---|---|---|---|---|---|
| 1 | MDGL | MADRIGAL PHARMACEUTICALS INC | $1.04B | 10.38% | 2.0M | Hold |
| 2 | INSM | INSMED INC | $791.9M | 7.88% | 4.8M | Added |
| 3 | PTGX | PROTAGONIST THERAPEUTICS INC | $533.2M | 5.31% | 5.1M | Hold |
| 4 | PTCT | PTC THERAPEUTICS INC | $527.8M | 5.25% | 7.7M | Hold |
| 5 | ARGX | ARGENX SE | $518.1M | 5.16% | 709,446 | Added |
| 6 | CGON | CG ONCOLOGY INC | $472.7M | 4.70% | 7.0M | Added |
| 7 | CELC | CELCUITY INC | $346.9M | 3.45% | 3.0M | Added |
| 8 | TNGX | TANGO THERAPEUTICS INC | $278.2M | 2.77% | 13.3M | Added |
| 9 | ERAS | ERASCA INC | $261.4M | 2.60% | 16.2M | Added |
| 10 | NTRA | NATERA INC | $250.0M | 2.49% | 1.2M | Trimmed |
| 11 | RDNT | RADNET INC | $239.5M | 2.38% | 4.3M | Added |
| 12 | TARS | TARSUS PHARMACEUTICALS INC | $234.7M | 2.34% | 3.3M | Added |
| 13 | APGE | APOGEE THERAPEUTICS INC | $234.2M | 2.33% | 2.8M | Added |
| 14 | SYRE | SPYRE THERAPEUTICS INC | $210.4M | 2.09% | 4.2M | Hold |
| 15 | COGT | COGENT BIOSCIENCES INC | $210.1M | 2.09% | 5.5M | Trimmed |
| 16 | IRTC | IRHYTHM HOLDINGS INC | $196.9M | 1.96% | 1.7M | Added |
| 17 | STOK | STOKE THERAPEUTICS INC | $183.1M | 1.82% | 5.6M | Added |
| 18 | CYTK | CYTOKINETICS INC | $179.4M | 1.78% | 2.7M | Hold |
| 19 | ACAD | ACADIA PHARMACEUTICALS INC | $159.0M | 1.58% | 7.1M | Hold |
| 20 | ESTA | ESTABLISHMENT LABS HLDGS INC | $150.8M | 1.50% | 2.7M | Added |
| 21 | APLS | APELLIS PHARMACEUTICALS INC | $148.2M | 1.48% | 3.7M | Trimmed |
| 22 | IMCR | IMMUNOCORE HLDGS PLC | $146.8M | 1.46% | 4.9M | Hold |
| 23 | RGEN | REPLIGEN CORP | $142.1M | 1.41% | 1.2M | Added |
| 24 | NBIX | NEUROCRINE BIOSCIENCES INC | $139.9M | 1.39% | 1.1M | Hold |
| 25 | GH | GUARDANT HEALTH INC | $136.8M | 1.36% | 1.5M | Hold |
Source: SEC Form 13F filings · as of 2026-03-31