Fund HoldingsRock Springs Capital Management LP

Total Portfolio Value
$3.94B
Total Bought
$593.69M
Total Sold
$614.78M
Net Transaction
-$21.09M
Filing Period:
Securities
SharesValue ($K)
Q4 2023
Q1 2024
Change
Q4 2023
Q1 2024
Weight (%)
Change
ELI LILLY & CO(LLY)69,500103,250+33,75040,51380,3242.04%+39,811
MADRIGAL PHARMACEUTICALS INC(MDGL)198,169285,931+87,76245,85276,3551.94%+30,503
SURGERY PARTNERS INC(SGRY)0985,000+985,000029,3830.75%+29,383
MERUS N V872,0691,146,560+274,49123,98251,6301.31%+27,648
OSCAR HEALTH INC(OSCR)735,0002,110,000+1,375,0006,72531,3760.80%+24,650
KYMERA THERAPEUTICS INC(KYMR)1,522,2381,522,238038,75661,1941.55%+22,438
VIKING THERAPEUTICS INC(VKTX)0261,000+261,000021,4020.54%+21,402
SHOCKWAVE MED INC0135,000+135,000043,9601.12%+43,960
FRESHPET INC(FRPT)662,500662,500057,47976,7571.95%+19,279
CELLDEX THERAPEUTICS INC NEW(CLDX)969,6461,372,185+402,53938,45657,5911.46%+19,134
NOVO-NORDISK A S(NVO)0147,500+147,500018,9390.48%+18,939
INTUITIVE SURGICAL INC298,500298,5000100,702119,1283.02%+18,426
PHARVARIS N V
COM
0752,924+752,924017,4000.44%+17,400
VERA THERAPEUTICS INC(VERA)0341,168+341,168014,7110.37%+14,711
CRINETICS PHARMACEUTICALS IN(CRNX)0289,400+289,400013,5470.34%+13,547
BOSTON SCIENTIFIC CORP(BSX)1,232,5001,232,500071,25184,4142.14%+13,163
CHARLES RIV LABS INTL INC(CRL)048,500+48,500013,1410.33%+13,141
DYNE THERAPEUTICS INC(DYN)0451,824+451,824012,8270.33%+12,827
INOZYME PHARMA INC3,681,1743,681,174015,68228,1980.72%+12,516
EDWARDS LIFESCIENCES CORP647,300647,300049,35761,8561.57%+12,499
JASPER THERAPEUTICS INC0404,335+404,335011,8710.30%+11,871
ALIGN TECHNOLOGY INC0220,000+220,000072,1421.83%+72,142
SAREPTA THERAPEUTICS INC(SRPT)0327,600+327,600042,4111.08%+42,411
ACADIA HEALTHCARE COMPANY IN(ACHC)1,073,5001,177,500+104,00083,47593,2822.37%+9,806
NUVALENT INC0125,302+125,30209,4090.24%+9,409
REVOLUTION MEDICINES INC(RVMD)725,152923,681+198,52920,79729,7700.76%+8,973
NEUMORA THERAPEUTICS INC.0646,118+646,11808,8840.23%+8,884
AZENTA INC(AZTA)507,500694,750+187,25033,05941,8801.06%+8,821
DEXCOM INC(DXCM)596,000596,750+75073,95882,7692.10%+8,812
MEREO BIOPHARMA GROUP PLC7,983,8518,142,109+158,25818,44326,8690.68%+8,426
IRHYTHM TECHNOLOGIES INC(IRTC)350,750392,250+41,50037,54445,5011.16%+7,957
INSPIRE MED SYS INC(INSP)99,000130,500+31,50020,14028,0300.71%+7,891
MACROGENICS INC1,178,7961,305,250+126,45411,34019,2130.49%+7,873
AKERO THERAPEUTICS INC01,299,888+1,299,888032,8350.83%+32,835
ENLIVEN THERAPEUTICS INC0428,571+428,57107,5390.19%+7,539
CG ONCOLOGY INC(CGON)0170,859+170,85907,5010.19%+7,501
ASCENDIS PHARMA A/S(ASND)0290,000+290,000043,8391.11%+43,839
APPLIED THERAPEUTICS INC895,1951,497,918+602,7232,99910,1860.26%+7,187
BIOHAVEN LTD(BHVN)0126,984+126,98406,9450.18%+6,945
AUTOLUS THERAPEUTICS PLC01,032,988+1,032,98806,5900.17%+6,590
MERSANA THERAPEUTICS INC3,046,7823,046,78207,06913,6500.35%+6,581
STRUCTURE THERAPEUTICS INC286,676412,649+125,97311,68517,6860.45%+6,001
WEST PHARMACEUTICAL SVSC INC(WST)0137,250+137,250054,3111.38%+54,311
KRYSTAL BIOTECH INC(KRYS)103,969103,969012,89818,4990.47%+5,601
PHREESIA INC2,206,7002,365,000+158,30051,08556,5941.44%+5,509
ALNYLAM PHARMACEUTICALS INC(ALNY)(Call)032,500+32,50004,857+4,857
COLLEGIUM PHARMACEUTICAL INC(COLL)562,000562,000017,29821,8170.55%+4,518
KYVERNA THERAPEUTICS INC0178,963+178,96304,4450.11%+4,445
AGIOS PHARMACEUTICALS INC(AGIO)01,764,505+1,764,505051,5941.31%+51,594
EDAP TMS S A1,386,4251,475,000+88,5757,32010,8410.28%+3,521
VINCERX PHARMA INC891,719891,71901,0524,5120.11%+3,460
ARGENX SE(ARGX)0229,250+229,250090,2602.29%+90,260
COMPASS THERAPEUTICS INC5,513,7885,513,78808,60210,9170.28%+2,316
AURINIA PHARMACEUTICALS INC(AUPH)412,5701,150,347+737,7773,7095,7630.15%+2,054
FULCRUM THERAPEUTICS INC727,673727,67304,9126,8690.17%+1,957
ADAPTIMMUNE THERAPEUTICS PLC2,425,4682,425,46801,9233,8320.10%+1,909
BEAM THERAPEUTICS INC(BEAM)111,430147,510+36,0803,0334,8740.12%+1,841
DISC MEDICINE INC(IRON)363,468363,468020,99422,6300.57%+1,636
TRAVERE THERAPEUTICS INC(TVTX)2,771,4463,424,818+653,37224,91526,4050.67%+1,490
ESSA PHARMA INC677,005677,00504,4685,7480.15%+1,280
GOSSAMER BIO INC3,266,9603,266,96002,9813,8550.10%+874
COMPUGEN LTD1,289,9901,289,99002,5543,3280.08%+774
XILIO THERAPEUTICS INC1,440,7591,440,75907921,5560.04%+764
ACUMEN PHARMACEUTICALS INC2,300,0592,300,05908,8329,3150.24%+483
GOSSAMER BIO INC0003,4883,8450.10%+356
ACLARIS THERAPEUTICS INC(ACRS)02,753,495+2,753,49503,4140.09%+3,414
MINERALYS THERAPEUTICS INC(MLYS)1,167,492792,615-374,87710,04010,2330.26%+192
SAGIMET BIOSCIENCES INC738,355770,671+32,3164,0024,1770.11%+175
TALPHERA INC316,460316,46002333260.01%+93
BIOMEA FUSION INC181,147181,14702,6302,7080.07%+78
TRAVERE THERAPEUTICS INC0002,7682,8420.07%+74
NEUROCRINE BIOSCIENCES INC(NBIX)0001,7531,8070.05%+54
RENEO PHARMACEUTICALS INC0751,730+751,73001,2480.03%+1,248
NUVATION BIO INC(NUVB)134,028134,02808410.00%+33
VIGIL NEUROSCIENCE INC471,958471,95801,5951,6090.04%+14
NEVRO CORP0004824740.01%-8
NOVAVAX INC(NVAX)537,625537,62502,5812,5700.07%-11
EVOLENT HEALTH INC3,960,0003,987,500+27,500130,799130,7503.32%-49
WARBY PARKER INC(WRBY)2,028,3002,080,000+51,70028,59928,3090.72%-290
ULTRAGENYX PHARMACEUTICAL IN(RARE)1,754,0381,774,938+20,90083,87882,8722.10%-1,006
LEAP THERAPEUTICS INC832,937911,937+79,0003,4532,4260.06%-1,027
PLIANT THERAPEUTICS INC384,996384,99606,9725,7360.15%-1,236
BIOMARIN PHARMACEUTICAL INC(BMRN)0148,832+148,832012,9990.33%+12,999
AMICUS THERAPEUTICS INC
COM
1,063,8061,152,656+88,85015,09513,5780.34%-1,517
LEGEND BIOTECH CORP(LEGN)492,444499,486+7,04229,63028,0160.71%-1,614
BIOCRYST PHARMACEUTICALS INC(BCRX)3,270,3813,496,256+225,87519,59017,7610.45%-1,829
EXACT SCIENCES CORP(EXK)1,019,5001,059,750+40,25075,42373,1861.86%-2,236
PULMONX CORP652,400652,40008,3186,0480.15%-2,270
DYNAVAX TECHNOLOGIES CORP01,675,474+1,675,474020,7930.53%+20,793
IDEXX LABS INC(IDXX)179,250179,250099,49396,7822.46%-2,710
OLINK HLDG AB1,676,5001,676,500042,16439,4151.00%-2,749
XENON PHARMACEUTICALS INC(XENE)1,255,5771,255,577057,83254,0531.37%-3,779
RHYTHM PHARMACEUTICALS INC(RYTM)1,522,8931,522,893070,00765,9871.68%-4,020
IMMUNOVANT INC(IMVT)983,3011,150,123+166,82241,42637,1600.94%-4,266
ACCOLADE INC3,485,0003,540,000+55,00041,85537,0990.94%-4,756
PACIRA BIOSCIENCES INC(PCRX)1,055,5001,055,500035,61330,8420.78%-4,771
AMYLYX PHARMACEUTICALS INC(AMLX)01,011,412+1,011,41202,8720.07%+2,872
SPRUCE BIOSCIENCES INC2,609,1252,609,12507,6452,0510.05%-5,594
LIFESTANCE HEALTH GROUP INC(LFST)4,535,0004,780,000+245,00035,50929,4930.75%-6,016
NEVRO CORP1,025,0001,065,000+40,00022,05815,3790.39%-6,679
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