Fund HoldingsRock Springs Capital Management LP

Total Portfolio Value
$1.75B
Total Bought
$119.93M
Total Sold
$881.88M
Net Transaction
-$761.96M
Filing Period:
Securities
SharesValue ($K)
Q4 2024
Q1 2025
Change
Q4 2024
Q1 2025
Weight (%)
Change
AGILON HEALTH INC(AGL)06,950,000+6,950,000030,0941.72%+30,094
TARSUS PHARMACEUTICALS INC(TARS)110,889354,376+243,4876,14018,2041.04%+12,064
DANAHER CORPORATION(DHR)058,800+58,800012,0540.69%+12,054
MINERALYS THERAPEUTICS INC(MLYS)0320,813+320,81305,0950.29%+5,095
MERUS N V892,549980,751+88,20237,53241,2802.36%+3,748
KESTRA MED TECHNOLOGIES LTD
SHS
0145,000+145,00003,6130.21%+3,613
SOLENO THERAPEUTICS INC124,095124,09505,5788,8670.51%+3,289
EVOLENT HEALTH INC02,695,700+2,695,700025,5281.46%+25,528
89BIO INC552,741844,441+291,7004,3226,1390.35%+1,817
REGENERON PHARMACEUTICALS(REGN)02,800+2,80001,7760.10%+1,776
INSMED INC(INSM)0515,900+515,900039,3582.25%+39,358
LENZ THERAPEUTICS INC29,30583,082+53,7778462,1360.12%+1,290
AMYLYX PHARMACEUTICALS INC(AMLX)0343,228+343,22801,2150.07%+1,215
TENET HEALTHCARE CORP(THC)129,200130,000+80016,30917,4851.00%+1,176
COMPASS THERAPEUTICS INC5,779,5754,962,955-816,6208,3809,4300.54%+1,049
SIONNA THERAPEUTICS INC099,429+99,42901,0400.06%+1,040
AKERO THERAPEUTICS INC946,499672,759-273,74026,33227,2331.56%+902
ALPHATEC HLDGS INC(ATEC)200,000267,500+67,5001,8362,7120.16%+876
LEGEND BIOTECH CORP(LEGN)512,132512,932+80016,66517,4041.00%+739
GOSSAMER BIO INC3,266,9603,266,96002,9553,5940.21%+638
ARDELYX INC1,463,6291,604,975+141,3467,4217,8800.45%+460
SUMMIT THERAPEUTICS INC(SMMT)1,054,000995,000-59,00018,80919,1941.10%+385
GOSSAMER BIO INC0005,0705,2600.30%+191
VIGIL NEUROSCIENCE INC471,958471,95808028400.05%+38
NUVATION BIO INC(NUVB)134,028134,028031320.00%+1
TALPHERA INC316,460316,46001661570.01%-9
COMPUGEN LTD989,990989,99001,5151,4450.08%-69
VINCERX PHARMA INC891,7190-891,7192340-234
ZENAS BIOPHARMA INC(ZBIO)878,667878,66707,1966,9410.40%-255
DEXCOM INC(DXCM)353,000397,650+44,65027,45327,1561.55%-297
SPRUCE BIOSCIENCES INC2,609,1252,609,12501,0967570.04%-339
OSCAR HEALTH INC(OSCR)1,050,0001,050,000014,11213,7660.79%-346
PERSPECTIVE THERAPEUTICS INC444,383444,38301,4189470.05%-471
ENLIVEN THERAPEUTICS INC428,571465,871+37,3009,6439,1680.52%-475
NEVRO CORP0004890-489
APPLIED THERAPEUTICS INC02,074,891+2,074,89101,0140.06%+1,014
KYVERNA THERAPEUTICS INC178,9630-178,9636690-669
BIOMEA FUSION INC181,1470-181,1477030-703
KORRO BIO INC35,71935,71901,3606220.04%-738
APELLIS PHARMACEUTICALS INC
COM
80,00080,00002,5531,7500.10%-803
ADAPTIMMUNE THERAPEUTICS PLC2,483,4682,483,46801,3384890.03%-849
NEUROGENE INC95,407104,339+8,9322,1811,2220.07%-959
SAGIMET BIOSCIENCES INC787,808787,80803,5452,5680.15%-977
EDAP TMS S A1,591,8001,270,000-321,8003,5182,4890.14%-1,029
NOVAVAX INC(NVAX)650,000650,00005,2264,1670.24%-1,059
ALLAKOS INC1,100,4090-1,100,4091,3310-1,331
NEVRO CORP1,648,100800,494-847,6066,1314,6750.27%-1,456
ZAI LAB LTD(ZLAB)1,305,337904,592-400,74534,18732,6921.87%-1,495
PULMONX CORP772,151503,700-268,4515,2433,3900.19%-1,853
MACROGENICS INC1,053,6471,145,214+91,5673,4241,4540.08%-1,970
AUTOLUS THERAPEUTICS PLC1,032,9880-1,032,9882,4280-2,428
ACADIA HEALTHCARE COMPANY IN(ACHC)0681,100+681,100020,6511.18%+20,651
PROTHENA CORP PLC
SHS
644,601492,601-152,0008,9286,0960.35%-2,832
XILIO THERAPEUTICS INC3,003,2590-3,003,2592,8680-2,868
ACUMEN PHARMACEUTICALS INC1,838,9160-1,838,9163,1630-3,163
BEAM THERAPEUTICS INC(BEAM)252,223150,020-102,2036,2552,9300.17%-3,325
NUVALENT INC429,994427,532-2,46233,66030,3211.73%-3,339
BICARA THERAPEUTICS INC445,975336,070-109,9057,7694,3790.25%-3,390
MERSANA THERAPEUTICS INC3,431,6843,814,684+383,0004,9071,3130.08%-3,594
LEAP THERAPEUTICS INC1,266,5460-1,266,5463,6410-3,641
CULLINAN THERAPEUTICS INC(CGEM)742,114644,633-97,4819,0394,8800.28%-4,159
EXACT SCIENCES CORP(EXK)0480,000+480,000020,7791.19%+20,779
PLIANT THERAPEUTICS INC404,796589,996+185,2005,3317960.05%-4,535
BIOHAVEN LTD(BHVN)129,8580-129,8584,8500-4,850
PHARVARIS N V
COM
775,131623,402-151,72914,8599,7870.56%-5,072
JANUX THERAPEUTICS INC(JANX)204,466204,466010,9475,5210.32%-5,427
AGIOS PHARMACEUTICALS INC(AGIO)0342,180+342,180010,0260.57%+10,026
DYNE THERAPEUTICS INC(DYN)474,528524,499+49,97111,1805,4860.31%-5,694
IMMUNOVANT INC(IMVT)0975,803+975,803016,6760.95%+16,676
BLUEPRINT MEDICINES CORP1,096,8991,007,569-89,33095,67289,1805.10%-6,492
SCHOLAR ROCK HLDG CORP(SRRK)716,782761,541+44,75930,97924,4841.40%-6,496
WARBY PARKER INC(WRBY)920,000835,000-85,00022,27315,2220.87%-7,051
AZENTA INC(AZTA)475,000475,000023,75016,4540.94%-7,296
JASPER THERAPEUTICS INC463,088545,171+82,0839,9012,3440.13%-7,557
INOZYME PHARMA INC3,861,9833,445,299-416,68410,6983,1350.18%-7,562
ACLARIS THERAPEUTICS INC(ACRS)6,204,3095,046,309-1,158,00015,3877,7210.44%-7,666
REVOLUTION MEDICINES INC(RVMD)1,213,2571,281,640+68,38353,06845,3192.59%-7,749
VERA THERAPEUTICS INC(VERA)487,863520,796+32,93320,63212,5100.72%-8,122
INSPIRE MED SYS INC(INSP)130,00099,250-30,75024,09915,8090.90%-8,291
ASCENDIS PHARMA A/S(ASND)305,000216,000-89,00041,98933,6661.93%-8,324
NEWAMSTERDAM PHARMA COMPANY
ORDINARY SHARES
767,522536,111-231,41119,72510,9740.63%-8,751
AMICUS THERAPEUTICS INC
COM
2,599,4251,909,362-690,06324,48715,5800.89%-8,906
XENCOR INC(XNCR)401,0130-401,0139,2150-9,215
IRHYTHM TECHNOLOGIES INC(IRTC)397,500254,300-143,20035,84326,6201.52%-9,222
STRUCTURE THERAPEUTICS INC01,132,979+1,132,979019,6121.12%+19,612
NEUMORA THERAPEUTICS INC.955,1060-955,10610,1240-10,124
PENUMBRA INC(PEN)240,000171,000-69,00056,99545,7272.62%-11,268
SPRINGWORKS THERAPEUTICS INC328,9110-328,91111,8840-11,884
BOSTON SCIENTIFIC CORP(BSX)460,000277,000-183,00041,08727,9441.60%-13,143
CRINETICS PHARMACEUTICALS IN(CRNX)294,1000-294,10015,0370-15,037
CELLDEX THERAPEUTICS INC NEW(CLDX)1,222,182812,653-409,52930,88514,7500.84%-16,135
ELI LILLY & CO(LLY)0113,500+113,500093,7415.36%+93,741
XENON PHARMACEUTICALS INC(XENE)1,251,859931,681-320,17849,07331,2581.79%-17,815
MIRUM PHARMACEUTICALS INC(MIRM)1,471,564951,765-519,79960,84942,8772.45%-17,972
BIOCRYST PHARMACEUTICALS INC(BCRX)2,677,996222,011-2,455,98520,1391,6650.10%-18,473
MEREO BIOPHARMA GROUP PLC9,599,1706,684,247-2,914,92333,59715,0400.86%-18,558
LIFESTANCE HEALTH GROUP INC(LFST)2,550,0000-2,550,00018,7940-18,793
KYMERA THERAPEUTICS INC(KYMR)1,034,137794,437-239,70041,60321,7441.24%-19,860
RHYTHM PHARMACEUTICALS INC(RYTM)1,162,718834,188-328,53065,08944,1872.53%-20,902
ALNYLAM PHARMACEUTICALS INC(ALNY)256,200143,250-112,95060,28638,6802.21%-21,606
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