Fund HoldingsRock Springs Capital Management LP

Total Portfolio Value
$4.06B
Total Bought
$744.54M
Total Sold
$600.51M
Net Transaction
+$144.04M
Filing Period:
Securities
SharesValue ($K)
Q3 2023
Q4 2023
Change
Q3 2023
Q4 2023
Weight (%)
Change
BLUEPRINT MEDICINES CORP2,685,2942,881,567+196,273134,855265,7966.54%+130,940
KARUNA THERAPEUTICS INC0515,024+515,0240163,0104.01%+163,010
CEREVEL THERAPEUTICS HLDNG I02,674,245+2,674,2450113,3882.79%+113,388
ELI LILLY & CO(LLY)069,500+69,500040,5131.00%+40,513
RHYTHM PHARMACEUTICALS INC(RYTM)1,597,1231,522,893-74,23036,61470,0071.72%+33,393
INSULET CORP(PODD)0431,750+431,750093,6812.31%+93,681
ULTRAGENYX PHARMACEUTICAL IN(RARE)01,754,038+1,754,038083,8782.06%+83,878
IMMUNOCORE HLDGS PLC(IMCR)02,661,507+2,661,5070181,8344.48%+181,834
EVOLENT HEALTH INC03,960,000+3,960,0000130,7993.22%+130,799
CELLDEX THERAPEUTICS INC NEW(CLDX)500,101969,646+469,54513,76338,4560.95%+24,693
ACADIA HEALTHCARE COMPANY IN(ACHC)01,073,500+1,073,500083,4752.05%+83,475
DEXCOM INC(DXCM)0596,000+596,000073,9581.82%+73,958
NEUROCRINE BIOSCIENCES INC(NBIX)1,236,0001,196,000-40,000139,050157,5853.88%+18,535
PHREESIA INC1,776,3912,206,700+430,30933,18351,0851.26%+17,902
KYMERA THERAPEUTICS INC(KYMR)01,522,238+1,522,238038,7560.95%+38,756
XENON PHARMACEUTICALS INC(XENE)1,178,0021,255,577+77,57540,24157,8321.42%+17,591
OLINK HLDG AB1,676,5001,676,500024,72842,1641.04%+17,436
MADRIGAL PHARMACEUTICALS INC(MDGL)0198,169+198,169045,8521.13%+45,852
IMMUNOVANT INC(IMVT)644,344983,301+338,95724,73641,4261.02%+16,690
IDEXX LABS INC(IDXX)0179,250+179,250099,4932.45%+99,493
FRESHPET INC(FRPT)662,500662,500043,64657,4791.41%+13,833
INTUITIVE SURGICAL INC0298,500+298,5000100,7022.48%+100,702
PENUMBRA INC(PEN)503,750537,500+33,750121,862135,2033.33%+13,341
STRUCTURE THERAPEUTICS INC0286,676+286,676011,6850.29%+11,685
INHIBRX INC(Call)0301,400+301,400011,453+11,453
INSPIRE MED SYS INC(INSP)44,50099,000+54,5008,83120,1400.50%+11,309
ACCOLADE INC2,913,0003,485,000+572,00030,82041,8551.03%+11,035
IMMUNOGEN INC759,365759,365012,05122,5150.55%+10,464
LIFESTANCE HEALTH GROUP INC(LFST)3,670,0004,535,000+865,00025,21335,5090.87%+10,296
BOSTON SCIENTIFIC CORP(BSX)1,160,0001,232,500+72,50061,24871,2511.75%+10,003
AZENTA INC(AZTA)477,500507,500+30,00023,96633,0590.81%+9,093
TRAVERE THERAPEUTICS INC(TVTX)1,807,7422,771,446+963,70416,16124,9150.61%+8,754
MEREO BIOPHARMA GROUP PLC7,676,4817,983,851+307,3709,90318,4430.45%+8,540
WARBY PARKER INC(WRBY)1,575,0002,028,300+453,30020,72728,5990.70%+7,872
ICOSAVAX INC868,409868,40906,73013,6860.34%+6,956
OSCAR HEALTH INC(OSCR)0735,000+735,00006,7250.17%+6,725
EXACT SCIENCES CORP(EXK)01,019,500+1,019,500075,4231.86%+75,423
MACROGENICS INC1,178,7961,178,79605,49311,3400.28%+5,847
UNITEDHEALTH GROUP INC(UNH)230,000230,0000115,964121,0882.98%+5,124
COLLEGIUM PHARMACEUTICAL INC(COLL)562,000562,000012,56117,2980.43%+4,738
EDWARDS LIFESCIENCES CORP0647,300+647,300049,3571.22%+49,357
IRHYTHM TECHNOLOGIES INC(IRTC)350,750350,750033,06237,5440.92%+4,483
MERUS N V838,428872,069+33,64119,77023,9820.59%+4,212
DISC MEDICINE INC(IRON)363,468363,468017,07620,9940.52%+3,918
PACIRA BIOSCIENCES INC(PCRX)01,055,500+1,055,500035,6130.88%+35,613
AMGEN INC(AMGN)68,00074,500+6,50018,27621,4570.53%+3,182
MERSANA THERAPEUTICS INC3,403,1333,046,782-356,3514,3227,0690.17%+2,747
KRYSTAL BIOTECH INC(KRYS)90,560103,969+13,40910,50512,8980.32%+2,393
ESSA PHARMA INC677,005677,00502,0924,4680.11%+2,376
AMICUS THERAPEUTICS INC
COM
1,063,8061,063,806012,93615,0950.37%+2,160
LEAP THERAPEUTICS INC1,074,517832,937-241,5801,4833,4530.08%+1,970
RELAY THERAPEUTICS INC(RLAY)673,966673,96605,6687,4200.18%+1,752
FULCRUM THERAPEUTICS INC727,673727,67303,2314,9120.12%+1,681
PULMONX CORP652,400652,40006,7398,3180.20%+1,579
BIOCRYST PHARMACEUTICALS INC(BCRX)2,551,2263,270,381+719,15518,06319,5900.48%+1,527
SPRUCE BIOSCIENCES INC2,728,1252,609,125-119,0006,1667,6450.19%+1,479
COMPUGEN LTD1,289,9901,289,99001,2002,5540.06%+1,354
ZAI LAB LTD(ZLAB)1,237,0231,137,023-100,00030,07231,0750.76%+1,003
APPLIED THERAPEUTICS INC808,809895,195+86,3862,0142,9990.07%+985
REVOLUTION MEDICINES INC(RVMD)725,152725,152020,07220,7970.51%+725
BEAM THERAPEUTICS INC(BEAM)111,430111,43002,6803,0330.07%+353
GOSSAMER BIO INC3,266,9603,266,96002,7212,9810.07%+260
NEUROCRINE BIOSCIENCES INC(NBIX)0001,4981,7530.04%+256
INOZYME PHARMA INC3,681,1743,681,174015,46115,6820.39%+221
VINCERX PHARMA INC891,719891,71909011,0520.03%+152
BIOMEA FUSION INC0181,147+181,14702,6300.06%+2,630
TRAVERE THERAPEUTICS INC0002,6772,7680.07%+90
ACELRX PHARMACEUTICALS INC316,460316,46001842330.01%+49
NEVRO CORP0004724820.01%+10
NUVATION BIO INC(NUVB)134,028134,02801380.00%-5
AURINIA PHARMACEUTICALS INC(AUPH)479,540412,570-66,9703,7263,7090.09%-17
GAMIDA CELL LTD52,0150-52,015540-54
SPERO THERAPEUTICS INC57,3730-57,373690-69
ATRECA INC362,5300-362,530950-95
TEMPEST THERAPEUTICS INC536,2140-536,2141630-163
MIRATI THERAPEUTICS INC1,131,207835,776-295,43149,27549,1021.21%-174
GOSSAMER BIO INC0003,7083,4880.09%-220
ADAPTIMMUNE THERAPEUTICS PLC2,787,8452,425,468-362,3772,1751,9230.05%-251
INVITAE CORP585,6590-585,6593540-354
CERVOMED INC80,0330-80,0333700-370
NKARTA INC331,5710-331,5714610-461
KINNATE BIOPHARMA INC405,8110-405,8115680-568
VIGIL NEUROSCIENCE INC471,958471,95802,5441,5950.04%-949
MINERALYS THERAPEUTICS INC(MLYS)01,167,492+1,167,492010,0400.25%+10,040
DESIGN THERAPEUTICS INC(DSGN)460,3910-460,3911,0870-1,087
LEGEND BIOTECH CORP(LEGN)458,265492,444+34,17930,78229,6300.73%-1,151
THESEUS PHARMACEUTICALS INC437,3290-437,3291,1760-1,176
NEVRO CORP1,211,6001,025,000-186,60023,28722,0580.54%-1,229
FATE THERAPEUTICS INC612,2150-612,2151,2980-1,298
ACELYRIN INC141,8760-141,8761,4430-1,443
PLIANT THERAPEUTICS INC491,221384,996-106,2258,5186,9720.17%-1,545
AEGLEA BIOTHERAPEUTICS INC(SYRE)136,5560-136,5561,6730-1,673
IMMATICS N.V(IMTX)1,875,4661,875,466021,71819,7490.49%-1,969
NOVAVAX INC(NVAX)647,700537,625-110,0754,6892,5810.06%-2,109
EDAP TMS S A1,360,0001,386,425+26,4259,5477,3200.18%-2,227
XILIO THERAPEUTICS INC1,440,7591,440,75903,0407920.02%-2,248
COMPASS THERAPEUTICS INC5,513,7885,513,788010,8628,6020.21%-2,261
SAGIMET BIOSCIENCES INC738,355738,35506,4984,0020.10%-2,496
ACUMEN PHARMACEUTICALS INC2,812,5792,300,059-512,52011,6728,8320.22%-2,840
MIRUM PHARMACEUTICALS INC(MIRM)1,820,7331,851,464+30,73157,53554,6551.35%-2,880
Page 1 of 1