Rock Springs Capital Management as of June 30, 2025
Portfolio Holdings for Rock Springs Capital Management
Rock Springs Capital Management holds 93 positions in its portfolio as reported in the June 2025 quarterly 13F filing
| Company (Ticker) | Portfolio Weight | Valued At | Change in Shares | Share Count | Share Price |
|---|---|---|---|---|---|
| Argenx Se Sponsored Adr (ARGX) | 6.0 | $97M | 176k | 551.22 | |
| Eli Lilly & Co. (LLY) | 5.7 | $91M | 117k | 779.53 | |
| Merus N V (MRUS) | 3.5 | $56M | 1.1M | 52.60 | |
| Rhythm Pharmaceuticals (RYTM) | 3.4 | $54M | 861k | 63.19 | |
| Insmed Com Par $.01 (INSM) | 3.3 | $53M | 525k | 100.64 | |
| Ultragenyx Pharmaceutical (RARE) | 3.2 | $51M | 1.4M | 36.36 | |
| Revolution Medicines (RVMD) | 3.1 | $49M | 1.3M | 36.79 | |
| Intuitive Surgical Com New (ISRG) | 2.8 | $45M | 82k | 543.41 | |
| Madrigal Pharmaceuticals (MDGL) | 2.6 | $43M | 140k | 302.64 | |
| Mirum Pharmaceuticals (MIRM) | 2.6 | $42M | 818k | 50.89 | |
| Boston Scientific Corporation (BSX) | 2.4 | $38M | 355k | 107.41 | |
| Ascendis Pharma A/s Sponsored Adr (ASND) | 2.3 | $38M | 217k | 172.60 | |
| Irhythm Technologies (IRTC) | 2.3 | $37M | 243k | 153.96 | |
| Akero Therapeutics (AKRO) | 2.1 | $34M | 641k | 53.36 | |
| Penumbra (PEN) | 2.1 | $33M | 129k | 256.63 | |
| Agios Pharmaceuticals (AGIO) | 2.1 | $33M | 990k | 33.26 | |
| Alnylam Pharmaceuticals (ALNY) | 2.0 | $33M | 100k | 326.09 | |
| Evolent Health Cl A (EVH) | 2.0 | $32M | 2.8M | 11.26 | |
| Zai Lab Adr (ZLAB) | 1.9 | $31M | 871k | 34.97 | |
| EXACT Sciences Corporation (EXAS) | 1.9 | $30M | 572k | 53.14 | |
| Xenon Pharmaceuticals (XENE) | 1.8 | $29M | 932k | 31.30 | |
| Travere Therapeutics (TVTX) | 1.8 | $28M | 1.9M | 14.80 | |
| Scholar Rock Hldg Corp (SRRK) | 1.8 | $28M | 794k | 35.42 | |
| Dex (DXCM) | 1.6 | $25M | 287k | 87.29 | |
| Phreesia (PHR) | 1.5 | $24M | 837k | 28.46 | |
| Blueprint Medicines (BPMC) | 1.5 | $24M | 186k | 128.18 | |
| Structure Therapeutics Sponsored Ads (GPCR) | 1.5 | $24M | 1.1M | 20.74 | |
| Tenet Healthcare Corp Com New (THC) | 1.4 | $23M | 130k | 176.00 | |
| Caris Life Sciences (CAI) | 1.3 | $21M | 794k | 26.72 | |
| Kymera Therapeutics (KYMR) | 1.2 | $20M | 450k | 43.64 | |
| Omada Health (OMDA) | 1.0 | $17M | 920k | 18.30 | |
| Celldex Therapeutics Com New (CLDX) | 1.0 | $17M | 813k | 20.35 | |
| Brooks Automation (AZTA) | 1.0 | $16M | 530k | 30.78 | |
| Acadia Healthcare (ACHC) | 1.0 | $16M | 696k | 22.69 | |
| UnitedHealth (UNH) | 1.0 | $16M | 51k | 311.97 | |
| Tarsus Pharmaceuticals (TARS) | 0.9 | $15M | 374k | 40.51 | |
| Summit Therapeutics (SMMT) | 0.9 | $15M | 710k | 21.28 | |
| Agilon Health (AGL) | 0.9 | $15M | 6.6M | 2.30 | |
| Oscar Health Cl A (OSCR) | 0.9 | $15M | 700k | 21.44 | |
| Vera Therapeutics Cl A (VERA) | 0.9 | $15M | 617k | 23.56 | |
| Enliven Therapeutics (ELVN) | 0.9 | $14M | 701k | 20.06 | |
| Inspire Med Sys (INSP) | 0.9 | $14M | 108k | 129.77 | |
| Soleno Therapeutics (SLNO) | 0.8 | $13M | 155k | 83.78 | |
| Compass Therapeutics (CMPX) | 0.8 | $13M | 5.0M | 2.60 | |
| Spdr Series Trust S&p Biotech (XBI) | 0.8 | $13M | 152k | 82.93 | |
| Arcellx Common Stock (ACLX) | 0.8 | $12M | 186k | 65.85 | |
| Mereo Biopharma Group Spon Ads (MREO) | 0.8 | $12M | 4.5M | 2.71 | |
| Danaher Corporation (DHR) | 0.7 | $12M | 59k | 197.54 | |
| Amicus Therapeutics (FOLD) | 0.7 | $11M | 2.0M | 5.73 | |
| West Pharmaceutical Services (WST) | 0.7 | $11M | 51k | 218.80 | |
| Neurocrine Biosciences (NBIX) | 0.7 | $11M | 89k | 125.69 | |
| Pharvaris N V (PHVS) | 0.7 | $11M | 623k | 17.60 | |
| Edwards Lifesciences (EW) | 0.6 | $10M | 131k | 78.21 | |
| Newamsterdam Pharma Company Ordinary Shares (NAMS) | 0.6 | $9.7M | 536k | 18.11 | |
| Ardelyx (ARDX) | 0.6 | $9.0M | 2.3M | 3.92 | |
| Nuvalent Inc-a (NUVL) | 0.4 | $7.1M | 93k | 76.30 | |
| Aclaris Therapeutics (ACRS) | 0.4 | $6.8M | 4.8M | 1.42 | |
| Cidara Therapeutics Com New (CDTX) | 0.4 | $6.5M | 134k | 48.71 | |
| Zenas Biopharma (ZBIO) | 0.4 | $6.2M | 641k | 9.69 | |
| Regeneron Pharmaceuticals (REGN) | 0.4 | $5.9M | 11k | 525.00 | |
| Cogent Biosciences (COGT) | 0.4 | $5.7M | 800k | 7.18 | |
| Dyne Therapeutics (DYN) | 0.3 | $5.5M | 581k | 9.52 | |
| Cullinan Oncology (CGEM) | 0.3 | $5.0M | 668k | 7.53 | |
| Gossamer Bio Note 5.000% 6/0 (Principal) | 0.3 | $5.0M | 9.6M | 0.52 | |
| Janux Therapeutics (JANX) | 0.3 | $4.9M | 210k | 23.10 | |
| Mineralys Therapeutics (MLYS) | 0.3 | $4.4M | 325k | 13.53 | |
| Thermo Fisher Scientific (TMO) | 0.3 | $4.1M | 10k | 405.46 | |
| Gossamer Bio (GOSS) | 0.3 | $4.0M | 3.3M | 1.23 | |
| Immunovant (IMVT) | 0.2 | $3.5M | 222k | 16.00 | |
| Amylyx Pharmaceuticals (AMLX) | 0.2 | $3.2M | 500k | 6.41 | |
| Bicara Therapeutics (BCAX) | 0.2 | $3.1M | 336k | 9.29 | |
| Jasper Therapeutics Com New (JSPR) | 0.2 | $3.0M | 545k | 5.55 | |
| Prothena Corp SHS (PRTA) | 0.2 | $3.0M | 493k | 6.07 | |
| Alphatec Hldgs Com New (ATEC) | 0.2 | $3.0M | 268k | 11.10 | |
| Lenz Therapeutics (LENZ) | 0.2 | $2.5M | 84k | 29.31 | |
| Edap Tms S A Sponsored Adr (EDAP) | 0.1 | $2.1M | 1.3M | 1.65 | |
| Compugen Ord (CGEN) | 0.1 | $1.8M | 990k | 1.78 | |
| Sionna Therapeutics (SION) | 0.1 | $1.7M | 99k | 17.35 | |
| Pulmonx Corp (LUNG) | 0.1 | $1.7M | 651k | 2.59 | |
| Neurogene (NGNE) | 0.1 | $1.6M | 104k | 14.95 | |
| Perspective Therapeutics Com New (CATX) | 0.1 | $1.5M | 444k | 3.44 | |
| Apellis Pharmaceuticals (APLS) | 0.1 | $1.5M | 84k | 17.31 | |
| Sarepta Therapeutics (SRPT) | 0.1 | $1.2M | 69k | 17.10 | |
| Mersana Therapeutics | 0.1 | $1.1M | 3.8M | 0.30 | |
| Applied Therapeutics (APLT) | 0.0 | $646k | 2.1M | 0.31 | |
| Adaptimmune Therapeutics Sponds Ads (ADAP) | 0.0 | $595k | 2.5M | 0.24 | |
| Korro Bio (KRRO) | 0.0 | $446k | 36k | 12.49 | |
| Charles River Laboratories (CRL) | 0.0 | $410k | 2.7k | 151.73 | |
| 89bio (ETNB) | 0.0 | $393k | 40k | 9.82 | |
| Vaxcyte (PCVX) | 0.0 | $361k | 11k | 32.51 | |
| Novavax Com New (NVAX) | 0.0 | $340k | 54k | 6.30 | |
| Talphera Com New (TLPH) | 0.0 | $146k | 317k | 0.46 | |
| Nuvation Bio *w Exp 02/10/202 (NUVB.WS) | 0.0 | $36k | 134k | 0.27 |
