Fund Holdings — Rock Springs Capital Management LP

Total Portfolio Value
$1.70B
Total Bought
$184.61M
Total Sold
$388.71M
Net Transaction
-$204.10M
Filing Period:
Securities
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SharesValue ($K)
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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ENLIVEN THERAPEUTICS INC798,405826,500+28,09512,29532,3991.91%+20,103
MINIMED GROUP INC(MMED)01,055,000+1,055,000015,7410.93%+15,741
MIRUM PHARMACEUTICALS INC(MIRM)762,294811,294+49,00060,21474,9474.42%+14,734
ERASCA INC(ERAS)951,7101,103,469+151,7593,54017,8541.05%+14,314
REVOLUTION MEDICINES INC(RVMD)1,335,2701,209,465-125,805106,354117,6206.93%+11,266
XENON PHARMACEUTICALS INC(XENE)787,788763,020-24,76835,30944,3702.62%+9,061
ARCELLX INC
COMMON STOCK
169,859169,859011,07519,5031.15%+8,428
MADRIGAL PHARMACEUTICALS INC(MDGL)139,618170,999+31,38181,30589,5135.28%+8,208
PTC THERAPEUTICS INC(PTCT)61,879161,798+99,9194,70011,0230.65%+6,323
INDIVIOR PHARMACEUTICALS INC(INDV)0200,000+200,00006,0960.36%+6,096
CENTESSA PHARMACEUTICALS PLC324,015351,828+27,8138,10413,9750.82%+5,871
HEARTFLOW INC(HTFL)277,700572,500+294,8008,09513,9290.82%+5,834
AGIOS PHARMACEUTICALS INC(AGIO)799,163799,163021,75327,0361.59%+5,282
STRYKER CORPORATION(SYK)014,800+14,80004,8630.29%+4,863
TANGO THERAPEUTICS INC(TNGX)386,915386,91503,4288,0940.48%+4,666
SCHOLAR ROCK HLDG CORP(SRRK)733,477739,816+6,33932,31036,3692.14%+4,060
ACLARIS THERAPEUTICS INC(ACRS)4,453,7414,472,650+18,90913,40616,7720.99%+3,367
NOVO-NORDISK A S(NVO)090,000+90,00003,3080.19%+3,308
VIKING THERAPEUTICS INC(VKTX)096,000+96,00003,1240.18%+3,124
CENTURY THERAPEUTICS INC(IPSC)01,304,347+1,304,34702,9480.17%+2,948
CVS HEALTH CORP(CVS)040,000+40,00002,8730.17%+2,873
APELLIS PHARMACEUTICALS INC
COM
150,500162,750+12,2503,7816,5470.39%+2,767
KYMERA THERAPEUTICS INC(KYMR)496,871496,871038,66241,3842.44%+2,723
ALKERMES PLC(ALKS)139,228183,986+44,7583,8966,5060.38%+2,610
BICARA THERAPEUTICS INC429,095489,095+60,0007,2229,7280.57%+2,506
DIANTHUS THERAPEUTICS INC(DNTH)026,757+26,75702,2450.13%+2,245
PENUMBRA INC(PEN)120,500120,500037,46539,5692.33%+2,104
AGILON HEALTH INC(AGL)0260,000+260,00002,0570.12%+2,057
NEUROCRINE BIOSCIENCES INC(NBIX)125,500150,450+24,95017,80019,8201.17%+2,021
CELLDEX THERAPEUTICS INC NEW(CLDX)692,538650,270-42,26818,80920,6271.22%+1,817
TERNS PHARMACEUTICALS INC108,481113,748+5,2674,3835,9970.35%+1,614
BRIDGEBIO PHARMA INC(BBIO)103,500128,250+24,7507,9179,5240.56%+1,607
VAXCYTE INC(PCVX)47,00060,250+13,2502,1693,5010.21%+1,333
SUMMIT THERAPEUTICS INC(SMMT)710,000710,000012,41813,4620.79%+1,044
ZAI LAB LTD(ZLAB)811,546814,707+3,16114,31615,3250.90%+1,009
ASCENDIS PHARMA A/S(ASND)203,500194,000-9,50043,39444,3742.62%+979
PHARVARIS N V
COM
623,402645,533+22,13117,29918,2361.07%+937
AMYLYX PHARMACEUTICALS INC(AMLX)499,764499,76406,0376,9470.41%+910
EDAP TMS S A(FOCL)1,286,5001,378,000+91,5004,2335,1260.30%+894
UNITEDHEALTH GROUP INC(UNH)40,80053,000+12,20013,46814,3410.85%+873
JAZZ PHARMACEUTICALS PLC(JAZZ)1,7505,750+4,0002981,0870.06%+790
ROIVANT SCIENCES LTD(ROIV)88,75097,000+8,2501,9262,6870.16%+761
CYTOKINETICS INC(CYTK)35,85345,364+9,5112,2782,9900.18%+712
ARDELYX INC2,299,4732,299,473013,40613,7740.81%+368
MOONLAKE IMMUNOTHERAPEUTICS(MLTX)61,70061,70008131,1500.07%+337
CORCEPT THERAPEUTICS INC(CORT)50,25050,25001,7492,0260.12%+277
ORUKA THERAPEUTICS INC(ORKA)04,123+4,12302020.01%+202
JANUX THERAPEUTICS INC(JANX)358,798367,009+8,2114,9515,1010.30%+150
IMMUNOME INC(IMNM)347,666347,66607,4687,6030.45%+136
BIOCRYST PHARMACEUTICALS INC(BCRX)012,600+12,60001200.01%+120
OLEMA PHARMACEUTICALS INC(OLMA)98,240170,378+72,1382,4562,5400.15%+84
ACADIA HEALTHCARE COMPANY IN(ACHC)120,00075,500-44,5001,7031,7660.10%+63
REGENERON PHARMACEUTICALS(REGN)10,10010,10007,7967,8040.46%+8
LEGEND BIOTECH CORP(LEGN)33,80040,500+6,7007357330.04%-2
NUVATION BIO INC(NUVB)134,0280-134,028440—-44
NEUROGENE INC(NGNE)104,339104,33902,1492,1030.12%-46
TEVA PHARMACEUTICAL INDS LTD(TEVA)45,50045,50001,4201,3700.08%-50
SIONNA THERAPEUTICS INC(SION)99,42999,42904,0913,9860.23%-104
DYNE THERAPEUTICS INC(DYN)912,955972,198+59,24317,85717,6261.04%-231
MBX BIOSCIENCES INC(MBX)282,624287,967+5,3438,9148,5960.51%-318
ARCUS BIOSCIENCES INC(RCUS)180,000180,00004,2893,8880.23%-401
NEWAMSTERDAM PHARMA COMPANY
ORDINARY SHARES
557,194588,794+31,60019,54618,8471.11%-699
DEXCOM INC(DXCM)347,300355,600+8,30023,05022,3321.32%-719
THERMO FISHER SCIENTIFIC INC(TMO)10,00010,00005,7954,9150.29%-879
OCULAR THERAPEUTIX INC(OCUL)345,820383,716+37,8964,1983,2500.19%-948
JASPER THERAPEUTICS INC(JSPR)1,100,7261,100,72602,0149640.06%-1,050
TENET HEALTHCARE CORP(THC)125,000125,000024,84023,5891.39%-1,251
EYEPOINT INC(EYPT)258,739258,73904,7273,3350.20%-1,392
TALPHERA INC(TLPH)3,589,1863,589,18604,0922,6810.16%-1,411
LENZ THERAPEUTICS INC(LENZ)257,460257,46004,1192,3560.14%-1,764
SURGERY PARTNERS INC(SGRY)310,000208,000-102,0004,7902,4790.15%-2,310
DANAHER CORP DEL(DHR)61,50061,500014,07911,6600.69%-2,418
ALPHATEC HLDGS INC(ATEC)302,500350,000+47,5006,3653,8080.22%-2,557
SOLENO THERAPEUTICS INC247,053257,253+10,20011,4398,6130.51%-2,826
COMPASS THERAPEUTICS INC(CMPX)3,927,2023,305,308-621,89421,08917,4851.03%-3,604
MINERALYS THERAPEUTICS INC(MLYS)427,596439,751+12,15515,51711,9130.70%-3,605
ULTRAGENYX PHARMACEUTICAL IN(RARE)1,267,2411,218,773-48,46829,14725,5331.50%-3,613
INDIVIOR PLC105,1000-105,1003,7710—-3,771
ALNYLAM PHARMACEUTICALS INC(ALNY)71,25074,000+2,75028,33324,4841.44%-3,848
THERAVANCE BIOPHARMA INC(TBPH)208,7710-208,7713,9060—-3,906
INSMED INC(INSM)319,250314,300-4,95055,56251,3943.03%-4,168
MERSANA THERAPEUTICS INC152,5860-152,5864,4140—-4,414
AGILON HEALTH INC(AGL)6,500,0000-6,500,0004,4770—-4,477
EVOLENT HEALTH INC(EVH)2,675,0002,675,000010,7006,0990.36%-4,601
EDWARDS LIFESCIENCES CORP82,50028,900-53,6007,0332,3140.14%-4,719
OMADA HEALTH INC(OMDA)740,000541,000-199,00011,6776,8000.40%-4,877
INSPIRE MED SYS INC(INSP)131,000131,800+80012,0826,7980.40%-5,284
TARSUS PHARMACEUTICALS INC(TARS)260,344225,179-35,16521,31715,7960.93%-5,521
BOSTON SCIENTIFIC CORP(BSX)399,050515,300+116,25038,04932,3351.91%-5,714
COGENT BIOSCIENCES INC(COGT)849,030624,155-224,87530,15824,0241.42%-6,134
GOSSAMER BIO INC(GOSS)0006,5590—-6,559
AZENTA INC(AZTA)569,100569,100018,92812,0250.71%-6,903
RAPT THERAPEUTICS INC213,7310-213,7317,2390—-7,239
ZENAS BIOPHARMA INC(ZBIO)502,077502,077018,2309,8160.58%-8,415
CARIS LIFE SCIENCES INC(CAI)687,500563,000-124,50018,54910,0660.59%-8,482
VERA THERAPEUTICS INC(VERA)568,579503,585-64,99428,79320,2591.19%-8,534
INTUITIVE SURGICAL INC82,00082,000046,44237,8012.23%-8,640
GOSSAMER BIO INC(GOSS)3,266,9601,609,492-1,657,46810,1285290.03%-9,599
PHREESIA INC(PHR)876,600600,400-276,20014,8325,0310.30%-9,801
IRHYTHM HOLDINGS INC(IRTC)235,000261,750+26,75041,69830,8921.82%-10,807
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Rock Springs Capital Management LP — 13F Holdings — Q1 2026 | TickerTrail