Fund HoldingsEcoR1 Capital, LLC

Total Portfolio Value
$2.20B
Total Bought
$253.91M
Total Sold
$587.89M
Net Transaction
-$333.98M
Filing Period:
Securities
SharesValue ($K)
Q3 2025
Q4 2025
Change
Q3 2025
Q4 2025
Weight (%)
Change
ZYMEWORKS INC(ZYME)22,970,38822,970,3880392,334604,81027.44%+212,476
ANAPTYSBIO INC7,880,0947,880,0940241,288382,02717.33%+140,738
JAZZ PHARMACEUTICALS PLC(JAZZ)1,706,4691,706,4690224,913290,10013.16%+65,187
CENTESSA PHARMACEUTICALS PLC550,0003,115,000+2,565,00013,33877,9063.53%+64,569
BRIDGEBIO ONCOLOGY THERAPEUT02,823,126+2,823,126035,3461.60%+35,346
CG ONCOLOGY INC(CGON)0772,000+772,000032,0531.45%+32,053
MBX BIOSCIENCES INC(MBX)2,123,6042,123,604037,16366,9783.04%+29,815
ZENAS BIOPHARMA INC(ZBIO)0789,500+789,500028,6671.30%+28,667
STRUCTURE THERAPEUTICS INC0334,380+334,380023,2561.06%+23,256
CRINETICS PHARMACEUTICALS IN(CRNX)4,288,1204,288,1200178,600199,6129.06%+21,012
VAXCYTE INC(PCVX)0450,000+450,000020,7630.94%+20,763
IMMUNOME INC(IMNM)4,079,4152,855,590-1,223,82547,77061,3382.78%+13,568
VOYAGER THERAPEUTICS INC670,3034,002,847+3,332,5443,13015,7310.71%+12,601
CG ONCOLOGY INC(CGON)(Call)0292,800+292,800012,157+12,157
MANNKIND CORP(MNKD)01,660,000+1,660,00009,4120.43%+9,412
NUVATION BIO INC(NUVB)963,333963,33303,5648,6310.39%+5,067
EVOLUS INC0675,000+675,00004,4890.20%+4,489
IBIO INC02,228,000+2,228,00004,3000.20%+4,300
NEUROGENE INC1,271,3421,271,342022,03226,1901.19%+4,157
MEREO BIOPHARMA GROUP PLC07,856,466+7,856,46603,2740.15%+3,274
AQUESTIVE THERAPEUTICS INC2,625,0002,625,000014,67416,9580.77%+2,284
ATARA BIOTHERAPEUTICS INC573,183573,18308,21410,3690.47%+2,155
CAMP4 THERAPEUTICS CORP0325,000+325,00001,9920.09%+1,992
XENCOR INC(XNCR)(Call)067,500+67,50001,033+1,033
SURROZEN INC66,6654,444-62,2218591000.00%-759
COMPASS PATHWAYS PLC(CMPS)265,1370-265,1371,5190-1,519
GALAPAGOS NV(LKFT)1,667,1191,667,119057,74954,5152.47%-3,234
PEPGEN INC800,0000-800,0003,6960-3,696
KURA ONCOLOGY INC(KURA)872,5000-872,5007,7220-7,722
PRIME MEDICINE INC1,543,3260-1,543,3268,5500-8,550
ETON PHARMACEUTICALS INC(ETON)2,030,5442,030,544044,12434,3361.56%-9,787
METSERA INC271,5290-271,52914,2090-14,209
ALKERMES PLC(ALKS)500,0000-500,00015,0000-15,000
CRISPR THERAPEUTICS AG(CRSP)1,389,2761,389,276090,03972,8543.31%-17,185
XENCOR INC(XNCR)6,144,7673,251,112-2,893,65572,07849,7752.26%-22,304
ORIC PHARMACEUTICALS INC(ORIC)6,728,1166,728,116080,73755,0362.50%-25,701
BRIDGEBIO ONCOLOGY THERAPEUT2,823,1260-2,823,12632,6920-32,692
AVIDITY BIOSCIENCES INC765,0000-765,00033,3310-33,331
MADRIGAL PHARMACEUTICALS INC(MDGL)75,0000-75,00034,4000-34,399
APELLIS PHARMACEUTICALS INC
COM
3,447,1560-3,447,15678,0090-78,009
TANGO THERAPEUTICS INC(TNGX)10,630,7360-10,630,73689,2980-89,298
UNIQURE NV(QURE)3,988,9710-3,988,971232,8360-232,836
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