Fund HoldingsRock Springs Capital Management LP

Total Portfolio Value
$4.20B
Total Bought
$366.10M
Total Sold
$298.61M
Net Transaction
+$67.49M
Filing Period:
Securities
SharesValue ($K)
Q1 2023
Q2 2023
Change
Q1 2023
Q2 2023
Weight (%)
Change
BLUEPRINT MEDICINES CORP2,033,0482,186,672+153,62491,467138,1983.29%+46,731
IMMUNOCORE HLDGS PLC(IMCR)3,001,6623,028,410+26,748148,402181,5834.32%+33,181
ABCAM PLC2,242,5002,405,000+162,50030,18458,8501.40%+28,666
INTUITIVE SURGICAL INC298,500298,500076,258102,0692.43%+25,811
EXACT SCIENCES CORP(EXK)941,500943,500+2,00063,84388,5952.11%+24,752
CEREVEL THERAPEUTICS HLDNG I2,513,9162,513,916061,31479,9171.90%+18,603
KARUNA THERAPEUTICS INC493,527493,527089,644107,0212.55%+17,377
AKERO THERAPEUTICS INC1,454,2541,550,754+96,50055,64072,4051.72%+16,765
AGIOS PHARMACEUTICALS INC(AGIO)2,661,6052,686,167+24,56261,13776,0721.81%+14,935
PROTHENA CORP PLC
SHS
753,462753,462036,52051,4461.22%+14,926
BOSTON SCIENTIFIC CORP(BSX)0267,500+267,500014,4690.34%+14,469
MERUS N V0478,531+478,531012,6000.30%+12,600
IMMATICS N.V(IMTX)2,513,9232,536,144+22,22117,34629,2670.70%+11,921
ULTRAGENYX PHARMACEUTICAL IN(RARE)1,336,4011,384,269+47,86853,59063,8561.52%+10,267
ACADIA HEALTHCARE COMPANY IN(ACHC)860,868908,000+47,13262,19872,3131.72%+10,115
LEGEND BIOTECH CORP(LEGN)458,265458,265022,09831,6340.75%+9,536
DISC MEDICINE INC(IRON)313,468363,468+50,0006,64216,1380.38%+9,496
ACLARIS THERAPEUTICS INC3,961,8493,961,849032,05141,0840.98%+9,033
SHOCKWAVE MED INC115,100115,100024,95732,8510.78%+7,894
EDWARDS LIFESCIENCES CORP645,900645,900053,43560,9281.45%+7,492
WEST PHARMACEUTICAL SVSC INC(WST)202,000202,000069,98777,2591.84%+7,272
CONMED CORP(CNMD)205,000205,000021,29127,8570.66%+6,566
DEXCOM INC(DXCM)490,500490,500056,98663,0341.50%+6,048
ARGENX SE(ARGX)350,000350,0000130,403136,4063.25%+6,003
DYNAVAX TECHNOLOGIES CORP1,813,7581,813,758017,79323,4340.56%+5,641
PENUMBRA INC(PEN)433,500366,000-67,500120,812125,9263.00%+5,114
LIFESTANCE HEALTH GROUP INC(LFST)2,900,0002,900,000021,54726,4770.63%+4,930
MEREO BIOPHARMA GROUP PLC6,244,8977,042,391+797,4944,4159,2960.22%+4,881
KRYSTAL BIOTECH INC(KRYS)034,901+34,90104,0970.10%+4,097
MIRUM PHARMACEUTICALS INC(MIRM)1,795,7331,820,733+25,00043,13447,1021.12%+3,969
ICOSAVAX INC864,510868,409+3,8995,0148,6230.21%+3,609
REVOLUTION MEDICINES INC(RVMD)702,712702,712015,22118,7980.45%+3,577
CHINOOK THERAPEUTICS INC507,512396,280-111,23211,74915,2250.36%+3,476
LEAP THERAPEUTICS INC01,074,517+1,074,51703,3630.08%+3,363
XENON PHARMACEUTICALS INC(XENE)1,178,0021,178,002042,16145,3531.08%+3,192
AURA BIOSCIENCES INC1,019,7571,019,75709,46312,5940.30%+3,131
HUMANA INC(HUM)426,500470,000+43,500207,049210,1515.00%+3,102
ACELYRIN INC0141,876+141,87602,9650.07%+2,965
BLACK DIAMOND THERAPEUTICS I0563,233+563,23302,8440.07%+2,844
AZENTA INC431,200469,900+38,70019,24021,9350.52%+2,695
GUARDANT HEALTH INC(GH)200,000200,00004,6887,1600.17%+2,472
IMMUNOGEN INC0112,620+112,62002,1250.05%+2,125
WARBY PARKER INC(WRBY)1,300,0001,325,000+25,00013,76715,4890.37%+1,722
MINERALYS THERAPEUTICS INC(MLYS)1,167,4921,167,492018,28319,9060.47%+1,623
AMICUS THERAPEUTICS INC
COM
1,063,8061,063,806011,79813,3610.32%+1,564
ACCOLADE INC2,545,0002,820,000+275,00036,59737,9850.90%+1,388
PULMONX CORP652,400652,40007,2948,5530.20%+1,259
MIRATI THERAPEUTICS INC1,065,2611,121,647+56,38639,60640,5250.96%+919
HEALTH CATALYST INC929,900929,900010,85211,6240.28%+772
INOZYME PHARMA INC3,214,9003,428,084+213,18418,42119,0940.45%+673
RENEO PHARMACEUTICALS INC1,143,1851,143,18506,8367,4990.18%+663
SELECT SECTOR SPDR TR
ST STR CARE ETF
200,000200,000025,89226,5460.63%+654
COMPUGEN LTD01,289,990+1,289,99001,4710.03%+1,471
AEGLEA BIOTHERAPEUTICS INC03,413,906+3,413,90601,5380.04%+1,538
APPLIED THERAPEUTICS INC0780,791+780,79109990.02%+999
FULCRUM THERAPEUTICS INC0727,673+727,67302,4010.06%+2,401
NOVAVAX INC(NVAX)535,400536,700+1,3003,7103,9880.09%+277
GOSSAMER BIO INC00002,8890.07%+2,889
DESIGN THERAPEUTICS INC0460,391+460,39102,9000.07%+2,900
BIOHAVEN LTD(BHVN)685,623401,624-283,9999,3669,6070.23%+241
ESSA PHARMA INC0663,317+663,31701,7910.04%+1,791
VINCERX PHARMA INC0891,719+891,71901,1590.03%+1,159
THESEUS PHARMACEUTICALS INC437,329437,32903,8834,0800.10%+197
BEAM THERAPEUTICS INC(BEAM)111,430111,43003,4123,5580.08%+146
ACELRX PHARMACEUTICALS INC0316,460+316,46003510.01%+351
NUVATION BIO INC(NUVB)0134,028+134,0280220.00%+22
SPERO THERAPEUTICS INC0669,533+669,53309710.02%+971
NEVRO CORP00004620.01%+462
ATRECA INC0362,530+362,53003550.01%+355
GOSSAMER BIO INC01,100,274+1,100,27401,3200.03%+1,320
NEUROCRINE BIOSCIENCES INC(NBIX)00001,2760.03%+1,276
ALTIMMUNE INC0223,255+223,25507880.02%+788
SPRUCE BIOSCIENCES INC2,728,1252,728,12506,0295,8650.14%-164
VIGIL NEUROSCIENCE INC471,958471,95804,6204,4360.11%-184
FRESHPET INC(FRPT)662,500662,500043,85143,5991.04%-252
TRAVERE THERAPEUTICS INC0003,1262,8570.07%-270
ADAPTIMMUNE THERAPEUTICS PLC2,787,8452,787,84503,0392,5790.06%-460
EDAP TMS S A1,030,0001,186,300+156,30011,40210,9380.26%-464
COMPASS THERAPEUTICS INC5,513,7885,513,788018,03017,5340.42%-496
GAMIDA CELL LTD0715,023+715,02301,3800.03%+1,380
PARATEK PHARMACEUTICALS INC1,734,0371,734,03704,4043,8320.09%-572
FATE THERAPEUTICS INC612,215612,21503,4902,9140.07%-575
AURINIA PHARMACEUTICALS INC(AUPH)479,540479,54005,2564,6420.11%-614
PACIRA BIOSCIENCES INC(PCRX)1,032,6001,035,000+2,40042,14041,4720.99%-668
NKARTA INC0331,571+331,57107260.02%+726
XILIO THERAPEUTICS INC1,440,7591,440,75904,5673,7750.09%-792
CELLDEX THERAPEUTICS INC NEW(CLDX)421,504421,615+11115,16614,3050.34%-860
CYTOKINETICS INC(CYTK)447,600447,600015,75114,6010.35%-1,150
TEMPEST THERAPEUTICS INC0536,214+536,21406810.02%+681
ZAI LAB LTD(ZLAB)1,059,7001,222,423+162,72335,24633,8980.81%-1,348
LEAP THERAPEUTICS INC000000
PHREESIA INC1,302,5001,305,000+2,50042,05840,4680.96%-1,590
COLLEGIUM PHARMACEUTICAL INC(COLL)650,000650,000015,59413,9690.33%-1,625
NEUROCRINE BIOSCIENCES INC(NBIX)1,210,1001,279,500+69,400122,486120,6572.87%-1,829
BIOCRYST PHARMACEUTICALS INC(BCRX)2,334,0852,497,193+163,10819,46617,5800.42%-1,886
MACROGENICS INC1,123,0961,123,09608,0536,0090.14%-2,044
RHYTHM PHARMACEUTICALS INC(RYTM)1,597,1231,597,123028,49326,3370.63%-2,156
KYMERA THERAPEUTICS INC(KYMR)1,228,3791,487,551+259,17236,39734,1990.81%-2,198
NOVOCURE LTD(NVCR)125,000125,00007,5185,1880.12%-2,330
KINNATE BIOPHARMA INC746,973746,97304,6692,2630.05%-2,405
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