Fund HoldingsRock Springs Capital Management LP

Total Portfolio Value
$1.95B
Total Bought
$277.49M
Total Sold
$313.90M
Net Transaction
-$36.41M
Filing Period:
Securities
SharesValue ($K)
Q3 2025
Q4 2025
Change
Q3 2025
Q4 2025
Weight (%)
Change
REVOLUTION MEDICINES INC(RVMD)1,335,2701,335,270062,357106,3545.45%+43,997
ELI LILLY & CO(LLY)105,400105,400080,420113,2715.81%+32,851
TRAVERE THERAPEUTICS INC(TVTX)2,164,7732,210,322+45,54951,73884,4564.33%+32,718
EXACT SCIENCES CORP(EXK)593,500601,800+8,30032,47061,1193.13%+28,648
SPDR SERIES TRUST
ST STR SP BIOT
0222,000+222,000027,0681.39%+27,068
STRUCTURE THERAPEUTICS INC951,154748,236-202,91826,63252,0402.67%+25,408
CIDARA THERAPEUTICS INC249,402204,878-44,52423,88345,2562.32%+21,373
MADRIGAL PHARMACEUTICALS INC(MDGL)137,746139,618+1,87263,17981,3054.17%+18,127
COGENT BIOSCIENCES INC(COGT)1,008,308849,030-159,27814,47930,1581.55%+15,678
UNITEDHEALTH GROUP INC(UNH)040,800+40,800013,4680.69%+13,468
KYMERA THERAPEUTICS INC(KYMR)450,374496,871+46,49725,49138,6621.98%+13,170
AMICUS THERAPEUTICS INC
COM
1,947,3741,929,931-17,44315,34527,4821.41%+12,137
VERA THERAPEUTICS INC(VERA)617,396568,579-48,81717,94228,7931.48%+10,851
INTUITIVE SURGICAL INC82,00082,000036,67346,4422.38%+9,769
IMMUNOME INC(IMNM)0347,666+347,66607,4680.38%+7,468
DYNE THERAPEUTICS INC(DYN)824,061912,955+88,89410,42417,8570.92%+7,433
RAPT THERAPEUTICS INC0213,731+213,73107,2390.37%+7,239
PENUMBRA INC(PEN)120,500120,500030,52537,4651.92%+6,940
CENTESSA PHARMACEUTICALS PLC69,240324,015+254,7751,6798,1040.42%+6,425
COMPASS THERAPEUTICS INC4,474,7023,927,202-547,50015,66121,0891.08%+5,428
ZENAS BIOPHARMA INC(ZBIO)580,677502,077-78,60012,89118,2300.93%+5,339
NEUROCRINE BIOSCIENCES INC(NBIX)89,750125,500+35,75012,59917,8000.91%+5,201
SURGERY PARTNERS INC(SGRY)0310,000+310,00004,7900.25%+4,790
PTC THERAPEUTICS INC(PTCT)061,879+61,87904,7000.24%+4,700
ACLARIS THERAPEUTICS INC(ACRS)4,609,3094,453,741-155,5688,75813,4060.69%+4,648
MIRUM PHARMACEUTICALS INC(MIRM)761,126762,294+1,16855,79860,2143.09%+4,415
TERNS PHARMACEUTICALS INC0108,481+108,48104,3830.22%+4,383
ARCUS BIOSCIENCES INC(RCUS)0180,000+180,00004,2890.22%+4,289
EYEPOINT INC(EYPT)31,655258,739+227,0844514,7270.24%+4,276
TARSUS PHARMACEUTICALS INC(TARS)288,344260,344-28,00017,13621,3171.09%+4,181
MBX BIOSCIENCES INC(MBX)282,624282,62404,9468,9140.46%+3,968
THERAVANCE BIOPHARMA INC(TBPH)0208,771+208,77103,9060.20%+3,906
INSPIRE MED SYS INC(INSP)110,500131,000+20,5008,19912,0820.62%+3,883
INDIVIOR PLC0105,100+105,10003,7710.19%+3,771
ERASCA INC(ERAS)0951,710+951,71003,5400.18%+3,540
BRIDGEBIO PHARMA INC(BBIO)85,000103,500+18,5004,4157,9170.41%+3,502
TANGO THERAPEUTICS INC(TNGX)0386,915+386,91503,4280.18%+3,428
AZENTA INC(AZTA)540,400569,100+28,70015,52018,9280.97%+3,408
MERSANA THERAPEUTICS INC152,586152,58601,1844,4140.23%+3,230
BOSTON SCIENTIFIC CORP(BSX)360,250399,050+38,80035,17138,0491.95%+2,878
SCHOLAR ROCK HLDG CORP(SRRK)794,133733,477-60,65629,57432,3101.66%+2,736
NEWAMSTERDAM PHARMA COMPANY
ORDINARY SHARES
595,929557,194-38,73516,94819,5461.00%+2,598
OLEMA PHARMACEUTICALS INC(OLMA)098,240+98,24002,4560.13%+2,456
CYTOKINETICS INC(CYTK)035,853+35,85302,2780.12%+2,278
RHYTHM PHARMACEUTICALS INC(RYTM)717,102695,010-22,09272,42074,3943.81%+1,974
ALPHATEC HLDGS INC(ATEC)302,500302,50004,3986,3650.33%+1,966
ROIVANT SCIENCES LTD(ROIV)088,750+88,75001,9260.10%+1,926
DANAHER CORPORATION(DHR)61,50061,500012,19314,0790.72%+1,886
VAXCYTE INC(PCVX)11,10047,000+35,9004002,1690.11%+1,769
CORCEPT THERAPEUTICS INC(CORT)050,250+50,25001,7490.09%+1,749
PHARVARIS N V
COM
623,402623,402015,55417,2990.89%+1,746
DEXCOM INC(DXCM)316,900347,300+30,40021,32423,0501.18%+1,726
APELLIS PHARMACEUTICALS INC
COM
92,000150,500+58,5002,0823,7810.19%+1,699
GOSSAMER BIO INC3,266,9603,266,96008,59210,1280.52%+1,535
REGENERON PHARMACEUTICALS(REGN)11,30010,100-1,2006,3547,7960.40%+1,442
TEVA PHARMACEUTICAL INDS LTD(TEVA)045,500+45,50001,4200.07%+1,420
BICARA THERAPEUTICS INC370,666429,095+58,4295,8537,2220.37%+1,369
EDAP TMS S A1,270,0001,286,500+16,5002,9084,2330.22%+1,324
IRHYTHM TECHNOLOGIES INC(IRTC)235,000235,000040,41841,6982.14%+1,281
SIONNA THERAPEUTICS INC99,42999,42902,9244,0910.21%+1,166
XENON PHARMACEUTICALS INC(XENE)851,744787,788-63,95634,19835,3091.81%+1,111
SOLENO THERAPEUTICS INC154,528247,053+92,52510,44611,4390.59%+992
THERMO FISHER SCIENTIFIC INC(TMO)10,00010,00004,8505,7950.30%+944
TALPHERA INC3,589,1863,589,18603,2064,0920.21%+886
ARDELYX INC2,286,2732,299,473+13,20012,59713,4060.69%+809
ASCENDIS PHARMA A/S(ASND)214,500203,500-11,00042,64543,3942.23%+750
LEGEND BIOTECH CORP(LEGN)033,800+33,80007350.04%+735
ALKERMES PLC(ALKS)106,537139,228+32,6913,1963,8960.20%+699
OCULAR THERAPEUTIX INC(OCUL)300,000345,820+45,8203,5074,1980.22%+691
MOONLAKE IMMUNOTHERAPEUTICS(MLTX)28,20061,700+33,5002028130.04%+611
NEUROGENE INC104,339104,33901,8082,1490.11%+341
JAZZ PHARMACEUTICALS PLC(JAZZ)01,750+1,75002980.02%+298
NEWAMSTERDAM PHARMA COMPANY(Call)
ORDINARY SHARES
31,60031,60008991,109+210
EDWARDS LIFESCIENCES CORP88,00082,500-5,5006,8447,0330.36%+189
CELLDEX THERAPEUTICS INC NEW(CLDX)721,538692,538-29,00018,66618,8090.96%+143
INSMED INC(INSM)385,000319,250-65,75055,44455,5622.85%+118
MINERALYS THERAPEUTICS INC(MLYS)408,313427,596+19,28315,48315,5170.80%+34
NUVATION BIO INC(NUVB)134,028134,028027440.00%+17
COMPUGEN LTD13,4300-13,430200-20
GOSSAMER BIO INC0006,7196,5590.34%-159
JANUX THERAPEUTICS INC(JANX)210,366358,798+148,4325,1414,9510.25%-190
PROTHENA CORP PLC
SHS
25,3980-25,3982480-248
HEARTFLOW INC(HTFL)250,000277,700+27,7008,4158,0950.42%-320
NOVAVAX INC(NVAX)45,0000-45,0003900-390
CHARLES RIV LABS INTL INC(CRL)2,7000-2,7004220-422
TENET HEALTHCARE CORP(THC)125,000125,000025,38024,8401.27%-540
JASPER THERAPEUTICS INC1,100,7261,100,72602,6202,0140.10%-605
AMYLYX PHARMACEUTICALS INC(AMLX)499,764499,76406,7926,0370.31%-755
IMMUNOVANT INC(IMVT)72,9650-72,9651,1760-1,176
APPLIED THERAPEUTICS INC2,075,9910-2,075,9911,2560-1,256
PERSPECTIVE THERAPEUTICS INC444,3830-444,3831,5240-1,524
KORRO BIO INC35,7190-35,7191,7110-1,711
ENLIVEN THERAPEUTICS INC686,107798,405+112,29814,04512,2950.63%-1,749
SUMMIT THERAPEUTICS INC(SMMT)710,000710,000014,66912,4180.64%-2,251
ACADIA HEALTHCARE COMPANY IN(ACHC)170,000120,000-50,0004,2091,7030.09%-2,506
WEST PHARMACEUTICAL SVSC INC(WST)9,7500-9,7502,5580-2,558
AGILON HEALTH INC(AGL)6,966,3006,500,000-466,3007,1754,4770.23%-2,699
PHREESIA INC749,116876,600+127,48417,61914,8320.76%-2,787
ARCELLX INC
COMMON STOCK
178,982169,859-9,12314,69411,0750.57%-3,620
CARIS LIFE SCIENCES INC(CAI)793,651687,500-106,15124,00818,5490.95%-5,459
Page 1 of 1