Fund Holdings — Rock Springs Capital Management LP

Total Portfolio Value
$1.71B
Total Bought
$165.92M
Total Sold
$257.88M
Net Transaction
-$91.96M
Filing Period:
Securities
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SharesValue ($K)
Q2 2025
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Q3 2025
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Change
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Q2 2025
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Q3 2025
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Weight (%)
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Change
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TRAVERE THERAPEUTICS INC(TVTX)1,908,2082,164,773+256,56528,24151,7383.02%+23,497
MADRIGAL PHARMACEUTICALS INC(MDGL)140,296137,746-2,55042,45963,1793.69%+20,719
RHYTHM PHARMACEUTICALS INC(RYTM)861,153717,102-144,05154,41672,4204.23%+18,004
CIDARA THERAPEUTICS INC134,133249,402+115,2696,53423,8831.40%+17,349
MIRUM PHARMACEUTICALS INC(MIRM)818,206761,126-57,08041,63955,7983.26%+14,160
REVOLUTION MEDICINES INC(RVMD)1,330,9601,335,270+4,31048,96662,3573.65%+13,391
MINERALYS THERAPEUTICS INC(MLYS)324,513408,313+83,8004,39115,4830.91%+11,093
COGENT BIOSCIENCES INC(COGT)800,1991,008,308+208,1095,74514,4790.85%+8,734
LENZ THERAPEUTICS INC(LENZ)83,982236,227+152,2452,46211,0030.64%+8,542
HEARTFLOW INC(HTFL)0250,000+250,00008,4150.49%+8,415
ARGENX SE(ARGX)175,750142,750-33,00096,877105,2876.15%+8,410
NEWAMSTERDAM PHARMA COMPANY
ORDINARY SHARES
536,111595,929+59,8189,70916,9480.99%+7,239
ZENAS BIOPHARMA INC(ZBIO)640,467580,677-59,7906,20612,8910.75%+6,685
KYMERA THERAPEUTICS INC(KYMR)450,374450,374019,65425,4911.49%+5,837
AGIOS PHARMACEUTICALS INC(AGIO)989,745958,542-31,20332,91938,4762.25%+5,557
ASCENDIS PHARMA A/S(ASND)217,000214,500-2,50037,45442,6452.49%+5,191
XENON PHARMACEUTICALS INC(XENE)931,681851,744-79,93729,16234,1982.00%+5,036
MBX BIOSCIENCES INC(MBX)0282,624+282,62404,9460.29%+4,946
DYNE THERAPEUTICS INC(DYN)580,998824,061+243,0635,53110,4240.61%+4,893
PHARVARIS N V
COM
623,402623,402010,97215,5540.91%+4,582
GOSSAMER BIO INC(GOSS)3,266,9603,266,96004,0188,5920.50%+4,574
BRIDGEBIO PHARMA INC(BBIO)085,000+85,00004,4150.26%+4,415
AMICUS THERAPEUTICS INC
COM
1,960,3341,947,374-12,96011,23315,3450.90%+4,113
ARDELYX INC2,286,2732,286,27308,96212,5970.74%+3,635
AMYLYX PHARMACEUTICALS INC(AMLX)499,764499,76403,2036,7920.40%+3,588
OCULAR THERAPEUTIX INC(OCUL)0300,000+300,00003,5070.21%+3,507
OMADA HEALTH INC(OMDA)919,951919,950-116,83520,3401.19%+3,505
VERA THERAPEUTICS INC(VERA)617,396617,396014,54617,9421.05%+3,396
ALKERMES PLC(ALKS)0106,537+106,53703,1960.19%+3,196
IRHYTHM TECHNOLOGIES INC(IRTC)242,500235,000-7,50037,33540,4182.36%+3,082
STRUCTURE THERAPEUTICS INC1,135,879951,154-184,72523,55826,6321.56%+3,074
TALPHERA INC(TLPH)316,4603,589,186+3,272,7261463,2060.19%+3,060
CARIS LIFE SCIENCES INC(CAI)793,651793,651021,20624,0081.40%+2,802
COMPASS THERAPEUTICS INC(CMPX)4,962,9554,474,702-488,25312,90415,6610.92%+2,758
BICARA THERAPEUTICS INC336,070370,666+34,5963,1225,8530.34%+2,731
SPDR SERIES TRUST
ST STR SP BIOT
151,750151,750012,58515,2050.89%+2,621
INSMED INC(INSM)525,000385,000-140,00052,83655,4443.24%+2,608
TENET HEALTHCARE CORP(THC)130,000125,000-5,00022,88025,3801.48%+2,500
ARCELLX INC
COMMON STOCK
186,314178,982-7,33212,26914,6940.86%+2,426
CELLDEX THERAPEUTICS INC NEW(CLDX)812,653721,538-91,11516,53718,6661.09%+2,129
EXACT SCIENCES CORP(EXK)572,000593,500+21,50030,39632,4701.90%+2,074
TARSUS PHARMACEUTICALS INC(TARS)373,750288,344-85,40615,14117,1361.00%+1,996
ACLARIS THERAPEUTICS INC(ACRS)4,769,3094,609,309-160,0006,7728,7580.51%+1,985
GOSSAMER BIO INC(GOSS)0004,9526,7190.39%+1,766
CENTESSA PHARMACEUTICALS PLC069,240+69,24001,6790.10%+1,679
SCHOLAR ROCK HLDG CORP(SRRK)794,133794,133028,12829,5741.73%+1,445
NEUROCRINE BIOSCIENCES INC(NBIX)88,80089,750+95011,16112,5990.74%+1,438
ALPHATEC HLDGS INC(ATEC)267,500302,500+35,0002,9694,3980.26%+1,429
KORRO BIO INC(KRRO)35,71935,71904461,7110.10%+1,264
ALNYLAM PHARMACEUTICALS INC(ALNY)100,00074,250-25,75032,60933,8581.98%+1,249
SIONNA THERAPEUTICS INC(SION)99,42999,42901,7252,9240.17%+1,199
MERSANA THERAPEUTICS INC0152,586+152,58601,1840.07%+1,184
EDAP TMS S A(FOCL)1,270,0001,270,00002,0962,9080.17%+813
THERMO FISHER SCIENTIFIC INC(TMO)10,00010,00004,0554,8500.28%+796
APELLIS PHARMACEUTICALS INC
COM
84,30092,000+7,7001,4592,0820.12%+623
APPLIED THERAPEUTICS INC2,075,9912,075,99106461,2560.07%+610
DANAHER CORPORATION(DHR)59,00061,500+2,50011,65512,1930.71%+538
EYEPOINT PHARMACEUTICALS INC(EYPT)031,655+31,65504510.03%+451
REGENERON PHARMACEUTICALS(REGN)11,30011,30005,9336,3540.37%+421
JANUX THERAPEUTICS INC(JANX)210,266210,366+1004,8575,1410.30%+284
MERUS N V1,063,608597,051-466,55755,94656,2123.29%+267
NEUROGENE INC(NGNE)104,339104,33901,5601,8080.11%+248
MOONLAKE IMMUNOTHERAPEUTICS(MLTX)028,200+28,20002020.01%+202
NOVAVAX INC(NVAX)53,90045,000-8,9003403900.02%+51
VAXCYTE INC(PCVX)11,10011,10003614000.02%+39
CHARLES RIV LABS INTL INC(CRL)2,7002,70004104220.02%+13
PERSPECTIVE THERAPEUTICS INC(CATX)444,383444,38301,5291,5240.09%-4
NUVATION BIO INC(NUVB)134,028134,028036270.00%-9
ENLIVEN THERAPEUTICS INC701,408686,107-15,30114,07014,0450.82%-26
89BIO INC40,0000-40,0003930—-393
JASPER THERAPEUTICS INC(JSPR)545,1711,100,726+555,5553,0262,6200.15%-406
SUMMIT THERAPEUTICS INC(SMMT)710,000710,000015,10914,6690.86%-440
ADAPTIMMUNE THERAPEUTICS PLC(ADAPY)2,483,4680-2,483,4685950—-595
AZENTA INC(AZTA)530,400540,400+10,00016,32615,5200.91%-805
MERSANA THERAPEUTICS INC3,814,6840-3,814,6841,1290—-1,129
SAREPTA THERAPEUTICS INC(SRPT)68,6000-68,6001,1730—-1,173
PULMONX CORP(LUNG)651,1000-651,1001,6860—-1,686
COMPUGEN LTD(CGEN)989,99013,430-976,5601,762200.00%-1,742
IMMUNOVANT INC(IMVT)221,50072,965-148,5353,5441,1760.07%-2,368
PENUMBRA INC(PEN)128,500120,500-8,00032,97730,5251.78%-2,452
SOLENO THERAPEUTICS INC154,528154,528012,94610,4460.61%-2,500
MEREO BIOPHARMA GROUP PLC(MREO)4,465,2924,570,649+105,35712,1019,4160.55%-2,685
PROTHENA CORP PLC
SHS
492,60125,398-467,2032,9902480.01%-2,742
BOSTON SCIENTIFIC CORP(BSX)355,000360,250+5,25038,13135,1712.06%-2,959
EDWARDS LIFESCIENCES CORP131,00088,000-43,00010,2466,8440.40%-3,402
ZAI LAB LTD(ZLAB)871,392791,193-80,19930,47326,8141.57%-3,659
DEXCOM INC(DXCM)286,750316,900+30,15025,03021,3241.25%-3,706
AKERO THERAPEUTICS INC640,526626,526-14,00034,17829,7471.74%-4,431
CULLINAN THERAPEUTICS INC(CGEM)668,2330-668,2335,0320—-5,032
INSPIRE MED SYS INC(INSP)107,500110,500+3,00013,9508,1990.48%-5,751
PHREESIA INC(PHR)837,300749,116-88,18423,83017,6191.03%-6,210
EVOLENT HEALTH INC(EVH)2,820,7002,950,000+129,30031,76124,9571.46%-6,804
NUVALENT INC93,3280-93,3287,1210—-7,121
INTUITIVE SURGICAL INC82,00082,000044,56036,6732.14%-7,887
AGILON HEALTH INC(AGL)6,550,4006,966,300+415,90015,0667,1750.42%-7,891
WEST PHARMACEUTICAL SVSC INC(WST)51,0309,750-41,28011,1652,5580.15%-8,608
ELI LILLY & CO(LLY)116,500105,400-11,10090,81580,4204.70%-10,395
ACADIA HEALTHCARE COMPANY IN(ACHC)696,000170,000-526,00015,7924,2090.25%-11,583
ULTRAGENYX PHARMACEUTICAL IN(RARE)1,391,0721,246,341-144,73150,57937,4902.19%-13,089
OSCAR HEALTH INC(OSCR)700,0000-700,00015,0080—-15,008
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Rock Springs Capital Management LP — 13F Holdings — Q3 2025 | TickerTrail