Fund Holdings — Rock Springs Capital Management LP

Total Portfolio Value:
$1.70B
Total Bought:
$184.61M
Total Sold:
$388.71M
Net Transaction:
-$204.10M
Notable People:
Rock Springs Capital Llc
Securities
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SharesValue
Q4 2025
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Q1 2026
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Change
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Q4 2025
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Q1 2026
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Weight (%)
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Change
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Revolution Medicines, Inc.(RVMD)1,335,2701,209,465-125,805$106.35M$117.62M6.93%+$11.27M
Eli Lilly and Company(LLY)105,40098,700-6,700$113.27M$90.78M5.35%-$22.49M
Madrigal Pharmaceuticals, Inc.(MDGL)139,618170,999+31,381$81.31M$89.51M5.28%+$8.21M
Mirum Pharmaceuticals, Inc.(MIRM)762,294811,294+49,000$60.21M$74.95M4.42%+$14.73M
argenx SEADR(ARGX)103,25098,500-4,750$86.83M$71.93M4.24%-$14.90M
Rhythm Pharmaceuticals, Inc.(RYTM)695,010689,748-5,262$74.39M$59.99M3.54%-$14.41M
Insmed Incorporated(INSM)319,250314,300-4,950$55.56M$51.39M3.03%-$4.17M
Ascendis Pharma A/SADR(ASND)203,500194,000-9,500$43.39M$44.37M2.62%+$979.3K
Xenon Pharmaceuticals Inc.(XENE)787,788763,020-24,768$35.31M$44.37M2.62%+$9.06M
Travere Therapeutics, Inc.(TVTX)2,210,3221,477,954-732,368$84.46M$43.91M2.59%-$40.55M
Kymera Therapeutics, Inc.(KYMR)496,871496,8710$38.66M$41.38M2.44%+$2.72M
Penumbra, Inc.(PEN)120,500120,5000$37.46M$39.57M2.33%+$2.10M
Intuitive Surgical, Inc.(ISRG)82,00082,0000$46.44M$37.80M2.23%-$8.64M
Scholar Rock Holding Corporation(SRRK)733,477739,816+6,339$32.31M$36.37M2.14%+$4.06M
Enliven Therapeutics Inc798,405826,500+28,095$12.30M$32.40M1.91%+$20.10M
Boston Scientific Corporation(BSX)399,050515,300+116,250$38.05M$32.34M1.91%-$5.71M
iRhythm Holdings, Inc.(IRTC)235,000261,750+26,750$41.70M$30.89M1.82%-$10.81M
Structure Therapeutics IncADS748,236640,217-108,019$52.04M$30.86M1.82%-$21.18M
Agios Pharmaceuticals, Inc.(AGIO)799,163799,1630$21.75M$27.04M1.59%+$5.28M
Ultragenyx Pharmaceutical Inc.(RARE)1,267,2411,218,773-48,468$29.15M$25.53M1.50%-$3.61M
Alnylam Pharmaceuticals, Inc.(ALNY)71,25074,000+2,750$28.33M$24.48M1.44%-$3.85M
Cogent Biosciences, Inc.(COGT)849,030624,155-224,875$30.16M$24.02M1.42%-$6.13M
Tenet Healthcare Corporation(THC)125,000125,0000$24.84M$23.59M1.39%-$1.25M
DexCom, Inc.(DXCM)347,300355,600+8,300$23.05M$22.33M1.32%-$718.6K
Celldex Therapeutics, Inc.(CLDX)692,538650,270-42,268$18.81M$20.63M1.22%+$1.82M
Vera Therapeutics, Inc.CL A(VERA)568,579503,585-64,994$28.79M$20.26M1.19%-$8.53M
Neurocrine Biosciences, Inc.(NBIX)125,500150,450+24,950$17.80M$19.82M1.17%+$2.02M
Arcellx Inc
COMMON STOCK
169,859169,8590$11.07M$19.50M1.15%+$8.43M
Newamsterdam Pharma Company
ORDINARY SHARES
557,194588,794+31,600$19.55M$18.85M1.11%-$699.1K
Pharvaris N V
COM
623,402645,533+22,131$17.30M$18.24M1.07%+$936.9K
Erasca, Inc.(ERAS)951,7101,103,469+151,759$3.54M$17.85M1.05%+$14.31M
Dyne Therapeutics, Inc.(DYN)912,955972,198+59,243$17.86M$17.63M1.04%-$231.4K
Compass Therapeutics, Inc.(CMPX)3,927,2023,305,308-621,894$21.09M$17.49M1.03%-$3.60M
Aclaris Therapeutics, Inc.(ACRS)4,453,7414,472,650+18,909$13.41M$16.77M0.99%+$3.37M
Tarsus Pharmaceuticals, Inc.(TARS)260,344225,179-35,165$21.32M$15.80M0.93%-$5.52M
MiniMed Group, Inc.(MMED)01,055,000+1,055,000$0$15.74M0.93%+$15.74M
Zai Lab LimitedADR(ZLAB)811,546814,707+3,161$14.32M$15.32M0.90%+$1.01M
UnitedHealth Group Incorporated(UNH)40,80053,000+12,200$13.47M$14.34M0.85%+$872.8K
Centessa Pharmaceuticals PlcADS324,015351,828+27,813$8.10M$13.97M0.82%+$5.87M
Heartflow, Inc.(HTFL)277,700572,500+294,800$8.09M$13.93M0.82%+$5.83M
Ardelyx Inc2,299,4732,299,4730$13.41M$13.77M0.81%+$367.9K
Summit Therapeutics Inc.(SMMT)710,000710,0000$12.42M$13.46M0.79%+$1.04M
Azenta, Inc.(AZTA)569,100569,1000$18.93M$12.03M0.71%-$6.90M
Mineralys Therapeutics, Inc.(MLYS)427,596439,751+12,155$15.52M$11.91M0.70%-$3.60M
Danaher Corporation(DHR)61,50061,5000$14.08M$11.66M0.69%-$2.42M
PTC Therapeutics, Inc.(PTCT)61,879161,798+99,919$4.70M$11.02M0.65%+$6.32M
Caris Life Sciences, Inc.(CAI)687,500563,000-124,500$18.55M$10.07M0.59%-$8.48M
Zenas BioPharma, Inc.(ZBIO)502,077502,0770$18.23M$9.82M0.58%-$8.41M
Bicara Therapeutics Inc429,095489,095+60,000$7.22M$9.73M0.57%+$2.51M
BridgeBio Pharma, Inc.(BBIO)103,500128,250+24,750$7.92M$9.52M0.56%+$1.61M
Soleno Therapeutics Inc247,053257,253+10,200$11.44M$8.61M0.51%-$2.83M
MBX Biosciences, Inc.(MBX)282,624287,967+5,343$8.91M$8.60M0.51%-$318.1K
Tango Therapeutics, Inc.(TNGX)386,915386,9150$3.43M$8.09M0.48%+$4.67M
Regeneron Pharmaceuticals, Inc.(REGN)10,10010,1000$7.80M$7.80M0.46%+$7.8K
Immunome, Inc.(IMNM)347,666347,6660$7.47M$7.60M0.45%+$135.6K
Amylyx Pharmaceuticals, Inc.(AMLX)499,764499,7640$6.04M$6.95M0.41%+$909.6K
Omada Health, Inc.(OMDA)740,000541,000-199,000$11.68M$6.80M0.40%-$4.88M
Inspire Medical Systems, Inc.(INSP)131,000131,800+800$12.08M$6.80M0.40%-$5.28M
Apellis Pharmaceuticals Inc
COM
150,500162,750+12,250$3.78M$6.55M0.39%+$2.77M
Alkermes plcSHS(ALKS)139,228183,986+44,758$3.90M$6.51M0.38%+$2.61M
Evolent Health, Inc.CL A(EVH)2,675,0002,675,0000$10.70M$6.10M0.36%-$4.60M
Indivior Pharmaceuticals, Inc.(INDV)0200,000+200,000$0$6.10M0.36%+$6.10M
Terns Pharmaceuticals Inc108,481113,748+5,267$4.38M$6.00M0.35%+$1.61M
EDAP TMS S.A.ADR(FOCL)1,286,5001,378,000+91,500$4.23M$5.13M0.30%+$893.6K
Janux Therapeutics, Inc.(JANX)358,798367,009+8,211$4.95M$5.10M0.30%+$150.0K
Phreesia, Inc.(PHR)876,600600,400-276,200$14.83M$5.03M0.30%-$9.80M
Thermo Fisher Scientific Inc.(TMO)10,00010,0000$5.79M$4.92M0.29%-$879.2K
Stryker Corporation(SYK)014,800+14,800$0$4.86M0.29%+$4.86M
Sionna Therapeutics, Inc.(SION)99,42999,4290$4.09M$3.99M0.23%-$104.4K
Arcus Biosciences, Inc.(RCUS)180,000180,0000$4.29M$3.89M0.23%-$401.4K
Spdr Series TrustSTATE STREET SPD
ST STR SP BIOT
222,00030,000-192,000$27.07M$3.83M0.23%-$23.24M
Alphatec Holdings, Inc.(ATEC)302,500350,000+47,500$6.36M$3.81M0.22%-$2.56M
Vaxcyte, Inc.(PCVX)47,00060,250+13,250$2.17M$3.50M0.21%+$1.33M
EyePoint, Inc.(EYPT)258,739258,7390$4.73M$3.34M0.20%-$1.39M
Novo Nordisk A/SADR(NVO)090,000+90,000$0$3.31M0.19%+$3.31M
Ocular Therapeutix, Inc.(OCUL)345,820383,716+37,896$4.20M$3.25M0.19%-$948.2K
Viking Therapeutics, Inc.(VKTX)096,000+96,000$0$3.12M0.18%+$3.12M
Cytokinetics, Incorporated(CYTK)35,85345,364+9,511$2.28M$2.99M0.18%+$711.8K
Century Therapeutics, Inc.(IPSC)01,304,347+1,304,347$0$2.95M0.17%+$2.95M
CVS Health Corporation(CVS)040,000+40,000$0$2.87M0.17%+$2.87M
Roivant Sciences Ltd.SHS(ROIV)88,75097,000+8,250$1.93M$2.69M0.16%+$761.0K
Talphera, Inc.(TLPH)3,589,1863,589,1860$4.09M$2.68M0.16%-$1.41M
Olema Pharmaceuticals, Inc.(OLMA)98,240170,378+72,138$2.46M$2.54M0.15%+$84.3K
Surgery Partners, Inc.(SGRY)310,000208,000-102,000$4.79M$2.48M0.15%-$2.31M
LENZ Therapeutics, Inc.(LENZ)257,460257,4600$4.12M$2.36M0.14%-$1.76M
Edwards Lifesciences Corp82,50028,900-53,600$7.03M$2.31M0.14%-$4.72M
Dianthus Therapeutics, Inc.(DNTH)026,757+26,757$0$2.25M0.13%+$2.25M
Neurogene Inc.(NGNE)104,339104,3390$2.15M$2.10M0.12%-$45.9K
agilon health, inc.(AGL)0260,000+260,000$0$2.06M0.12%+$2.06M
Corcept Therapeutics Incorporated(CORT)50,25050,2500$1.75M$2.03M0.12%+$276.9K
Acadia Healthcare Company, Inc.(ACHC)120,00075,500-44,500$1.70M$1.77M0.10%+$63.1K
Teva Pharmaceutical Industries LimitedADS(TEVA)45,50045,5000$1.42M$1.37M0.08%-$49.6K
MoonLake ImmunotherapeuticsCL A(MLTX)61,70061,7000$813.2K$1.15M0.07%+$336.9K
Jazz Pharmaceuticals plcSHS USD(JAZZ)1,7505,750+4,000$297.5K$1.09M0.06%+$789.5K
Jasper Therapeutics, Inc.(JSPR)1,100,7261,100,7260$2.01M$964.5K0.06%-$1.05M
Legend Biotech CorporationADS(LEGN)33,80040,500+6,700$734.8K$732.6K0.04%-$2.2K
Gossamer Bio, Inc.(GOSS)3,266,9601,609,492-1,657,468$10.13M$528.7K0.03%-$9.60M
Amicus Therapeutic
COM
1,929,93121,062-1,908,869$27.48M$304.6K0.02%-$27.18M
Oruka Therapeutics, Inc.(ORKA)04,123+4,123$0$202.2K0.01%+$202.2K
BioCryst Pharmaceuticals, Inc.(BCRX)012,600+12,600$0$120.0K0.01%+$120.0K
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Rock Springs Capital Management LP — 13F Holdings — Q1 2026 | TickerTrail