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.
Rock Springs Capital Management LP (CIK 1595725) reported $1.70B across 97 reported positions in its SEC 13F filing for 2026-03-31. Largest positions: RVMD ($117.6M, 6.93%), LLY ($90.8M, 5.35%), MDGL ($89.5M, 5.28%), MIRM ($74.9M, 4.42%), ARGX ($71.9M, 4.24%). Source: SEC Form 13F.
| Rank | Ticker | Company | Value | % Portfolio | Shares | Action |
|---|---|---|---|---|---|---|
| 1 | RVMD | REVOLUTION MEDICINES INC | $117.6M | 6.93% | 1.2M | Trimmed |
| 2 | LLY | ELI LILLY & CO | $90.8M | 5.35% | 98,700 | Trimmed |
| 3 | MDGL | MADRIGAL PHARMACEUTICALS INC | $89.5M | 5.28% | 170,999 | Added |
| 4 | MIRM | MIRUM PHARMACEUTICALS INC | $74.9M | 4.42% | 811,294 | Added |
| 5 | ARGX | ARGENX SE | $71.9M | 4.24% | 98,500 | Trimmed |
| 6 | RYTM | RHYTHM PHARMACEUTICALS INC | $60.0M | 3.54% | 689,748 | Trimmed |
| 7 | INSM | INSMED INC | $51.4M | 3.03% | 314,300 | Trimmed |
| 8 | XENE | XENON PHARMACEUTICALS INC | $44.4M | 2.62% | 763,020 | Trimmed |
| 9 | ASND | ASCENDIS PHARMA A/S | $44.4M | 2.62% | 194,000 | Trimmed |
| 10 | TVTX | TRAVERE THERAPEUTICS INC | $43.9M | 2.59% | 1.5M | Trimmed |
| 11 | KYMR | KYMERA THERAPEUTICS INC | $41.4M | 2.44% | 496,871 | Hold |
| 12 | PEN | PENUMBRA INC | $39.6M | 2.33% | 120,500 | Hold |
| 13 | ISRG | INTUITIVE SURGICAL INC | $37.8M | 2.23% | 82,000 | Hold |
| 14 | SRRK | SCHOLAR ROCK HLDG CORP | $36.4M | 2.14% | 739,816 | Added |
| 15 | BSX | BOSTON SCIENTIFIC CORP | $32.3M | 1.91% | 515,300 | Added |
| 16 | ELVN | ENLIVEN THERAPEUTICS INC | $32.4M | 1.91% | 826,500 | Added |
| 17 | IRTC | IRHYTHM HOLDINGS INC | $30.9M | 1.82% | 261,750 | Added |
| 18 | GPCR | STRUCTURE THERAPEUTICS INC | $30.9M | 1.82% | 640,217 | Trimmed |
| 19 | AGIO | AGIOS PHARMACEUTICALS INC | $27.0M | 1.59% | 799,163 | Hold |
| 20 | RARE | ULTRAGENYX PHARMACEUTICAL IN | $25.5M | 1.50% | 1.2M | Trimmed |
| 21 | ALNY | ALNYLAM PHARMACEUTICALS INC | $24.5M | 1.44% | 74,000 | Added |
| 22 | COGT | COGENT BIOSCIENCES INC | $24.0M | 1.42% | 624,155 | Trimmed |
| 23 | THC | TENET HEALTHCARE CORP | $23.6M | 1.39% | 125,000 | Hold |
| 24 | DXCM | DEXCOM INC | $22.3M | 1.32% | 355,600 | Added |
| 25 | CLDX | CELLDEX THERAPEUTICS INC NEW | $20.6M | 1.22% | 650,270 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31