Rock Springs Capital Management LP 13F holdings, Q1 2025
Holdings as of March 31, 2025 · filings on SEC EDGAR · latest filing →
Rock Springs Capital Management LP disclosed 96 US equity positions worth $1.7bn in its Q1 2025 13F filing. The largest position was ARGX at 6.0% of the reported book, followed by LLY and 2655787D. Against the Q4 2024 filing, it opened 1 new position, added to 12 and reduced 34 among the top 50 holdings.
What did Rock Springs Capital Management LP own in Q1 2025? Top 50 positions
| # | Stock | Sector | Weight | Value | Shares | Δ shares | vs Q4 2024 |
|---|---|---|---|---|---|---|---|
| 1 | ARGX ARGENX SE | Healthcare | 6.0% | $104.0m | 175,750 | -23% | reduced |
| 2 | LLY ELI LILLY & CO | Healthcare | 5.4% | $93.7m | 113,500 | -21% | reduced |
| 3 | 2655787D BLUEPRINT MEDICINES CORP | 5.1% | $89.2m | 1,007,569 | -8% | reduced | |
| 4 | MDGL MADRIGAL PHARMACEUTICALS INC | Healthcare | 3.2% | $55.2m | 166,698 | -37% | reduced |
| 5 | UNH UNITEDHEALTH GROUP INC | Healthcare | 3.0% | $52.6m | 100,500 | -43% | reduced |
| 6 | TVTX TRAVERE THERAPEUTICS INC | Healthcare | 3.0% | $52.3m | 2,921,196 | -41% | reduced |
| 7 | ISRG INTUITIVE SURGICAL INC | Healthcare | 2.9% | $50.5m | 102,000 | -53% | reduced |
| 8 | RARE ULTRAGENYX PHARMACEUTICAL IN | Healthcare | 2.9% | $50.5m | 1,394,434 | -20% | reduced |
| 9 | PEN PENUMBRA INC | Healthcare | 2.6% | $45.7m | 171,000 | -29% | reduced |
| 10 | RVMD REVOLUTION MEDICINES INC | Healthcare | 2.6% | $45.3m | 1,281,640 | 6% | added |
| 11 | RYTM RHYTHM PHARMACEUTICALS INC | Healthcare | 2.5% | $44.2m | 834,188 | -28% | reduced |
| 12 | MIRM MIRUM PHARMACEUTICALS INC | Healthcare | 2.5% | $42.9m | 951,765 | -35% | reduced |
| 13 | MERUS N V | 2.4% | $41.3m | 980,751 | 10% | added | |
| 14 | INSM INSMED INC | Healthcare | 2.3% | $39.4m | 515,900 | -6% | reduced |
| 15 | ALNY ALNYLAM PHARMACEUTICALS INC | Healthcare | 2.2% | $38.7m | 143,250 | -44% | reduced |
| 16 | ASND ASCENDIS PHARMA A/S | Healthcare | 1.9% | $33.7m | 216,000 | -29% | reduced |
| 17 | ZLAB ZAI LAB LTD | Healthcare | 1.9% | $32.7m | 904,592 | -31% | reduced |
| 18 | XENE XENON PHARMACEUTICALS INC | Healthcare | 1.8% | $31.3m | 931,681 | -26% | reduced |
| 19 | NBIX NEUROCRINE BIOSCIENCES INC | Healthcare | 1.8% | $30.9m | 279,000 | -61% | reduced |
| 20 | NUVALENT INC | 1.7% | $30.3m | 427,532 | -1% | reduced | |
| 21 | AGL AGILON HEALTH INC | Healthcare | 1.7% | $30.1m | 6,950,000 | -7% | reduced |
| 22 | PHR PHREESIA INC | Healthcare | 1.7% | $29.4m | 1,148,336 | -44% | reduced |
| 23 | BSX BOSTON SCIENTIFIC CORP | Healthcare | 1.6% | $27.9m | 277,000 | -40% | reduced |
| 24 | AKERO THERAPEUTICS INC | 1.6% | $27.2m | 672,759 | -29% | reduced | |
| 25 | DXCM DEXCOM INC | Healthcare | 1.6% | $27.2m | 397,650 | 13% | added |
| 26 | IRTC IRHYTHM TECHNOLOGIES INC | Healthcare | 1.5% | $26.6m | 254,300 | -36% | reduced |
| 27 | EVH EVOLENT HEALTH INC | Healthcare | 1.5% | $25.5m | 2,695,700 | 31% | added |
| 28 | SRRK SCHOLAR ROCK HLDG CORP | Healthcare | 1.4% | $24.5m | 761,541 | 6% | added |
| 29 | KYMR KYMERA THERAPEUTICS INC | Healthcare | 1.2% | $21.7m | 794,437 | -23% | reduced |
| 30 | EXK EXACT SCIENCES CORP | Basic Materials | 1.2% | $20.8m | 480,000 | 7% | added |
| 31 | ACHC ACADIA HEALTHCARE COMPANY IN | Healthcare | 1.2% | $20.7m | 681,100 | 17% | added |
| 32 | GPCR STRUCTURE THERAPEUTICS INC | Healthcare | 1.1% | $19.6m | 1,132,979 | 5% | added |
| 33 | SMMT SUMMIT THERAPEUTICS INC | Healthcare | 1.1% | $19.2m | 995,000 | -6% | reduced |
| 34 | EW EDWARDS LIFESCIENCES CORP | Healthcare | 1.1% | $18.5m | 255,000 | -53% | reduced |
| 35 | TARS TARSUS PHARMACEUTICALS INC | Healthcare | 1.0% | $18.2m | 354,376 | 220% | added |
| 36 | THC TENET HEALTHCARE CORP | Healthcare | 1.0% | $17.5m | 130,000 | 1% | added |
| 37 | LEGN LEGEND BIOTECH CORP | Healthcare | 1.0% | $17.4m | 512,932 | 0% | held |
| 38 | IMVT IMMUNOVANT INC | Healthcare | 1.0% | $16.7m | 975,803 | 7% | added |
| 39 | AZTA AZENTA INC | Healthcare | 0.9% | $16.5m | 475,000 | 0% | held |
| 40 | INSP INSPIRE MED SYS INC | Healthcare | 0.9% | $15.8m | 99,250 | -24% | reduced |
| 41 | AM6 AMICUS THERAPEUTICS INC | 0.9% | $15.6m | 1,909,362 | -27% | reduced | |
| 42 | WRBY WARBY PARKER INC | Healthcare | 0.9% | $15.2m | 835,000 | -9% | reduced |
| 43 | MREO MEREO BIOPHARMA GROUP PLC | Healthcare | 0.9% | $15.0m | 6,684,247 | -30% | reduced |
| 44 | CLDX CELLDEX THERAPEUTICS INC NEW | Healthcare | 0.8% | $14.7m | 812,653 | -34% | reduced |
| 45 | OSCR OSCAR HEALTH INC | Healthcare | 0.8% | $13.8m | 1,050,000 | 0% | held |
| 46 | WST WEST PHARMACEUTICAL SVSC INC | Healthcare | 0.8% | $13.5m | 60,250 | -64% | reduced |
| 47 | VERA VERA THERAPEUTICS INC | Healthcare | 0.7% | $12.5m | 520,796 | 7% | added |
| 48 | DHR DANAHER CORPORATION | Healthcare | 0.7% | $12.1m | 58,800 | – | new |
| 49 | NEWAMSTERDAM PHARMA COMPANY | 0.6% | $11.0m | 536,111 | -30% | reduced | |
| 50 | SRPT SAREPTA THERAPEUTICS INC | Healthcare | 0.6% | $10.2m | 159,300 | -48% | reduced |
Weights are shares of the reported long US equity book (options excluded). Values are as filed, normalised to whole dollars. Share changes compare against the immediately preceding filing only.