Fund HoldingsEcoR1 Capital, LLC

Total Portfolio Value
$2.06B
Total Bought
$432.57M
Total Sold
$889.56M
Net Transaction
-$456.99M
Filing Period:
Securities
SharesValue ($K)
Q1 2026
Q2 2026
Change
Q1 2026
Q2 2026
Weight (%)
Change
AKTIS ONCOLOGY INC(AKTS)04,824,469+4,824,4690155,4937.56%+155,493
ANAPTYSBIO INC7,880,0947,880,0940437,030531,90625.86%+94,876
FIRST TRACKS BIOTHERAPEUTICS03,174,519+3,174,519063,8713.11%+63,871
CG ONCOLOGY INC(CGON)(Call)0561,500+561,500039,895+39,895
CG ONCOLOGY INC(CGON)1,102,0001,494,300+392,30074,583106,1705.16%+31,587
ZYMEWORKS INC(ZYME)22,970,38822,970,3880575,179600,44629.19%+25,267
ETON PHARMACEUTICALS INC(ETON)2,171,9382,171,938053,60378,6243.82%+25,021
FULCRUM THERAPEUTICS INC06,549,866+6,549,866023,9731.17%+23,973
LEGEND BIOTECH CORP(LEGN)0800,000+800,000023,1041.12%+23,104
STOKE THERAPEUTICS INC(STOK)100,000735,000+635,0003,25624,0491.17%+20,793
ATARA BIOTHERAPEUTICS INC99,5931,552,000+1,452,40747117,8170.87%+17,346
NEUROGENE INC1,271,3421,271,342025,63039,9841.94%+14,353
AURA BIOSCIENCES INC01,666,667+1,666,667011,8330.58%+11,833
ODYSSEY THERAPEUTICS INC0555,555+555,555010,3940.51%+10,394
CRISPR THERAPEUTICS AG(CRSP)1,389,2761,389,276066,08875,7713.68%+9,683
EIKON THERAPEUTICS INC0732,606+732,60609,5610.46%+9,561
PHARVARIS N V
COM
0235,000+235,00008,1260.40%+8,126
NURIX THERAPEUTICS INC(NRIX)0270,000+270,00006,5500.32%+6,550
ELOXX PHARMACEUTICALS INC0400,000+400,00005,5520.27%+5,552
ZENAS BIOPHARMA INC(ZBIO)789,500789,500015,43520,0380.97%+4,603
AARDVARK THERAPEUTICS INC0396,194+396,19402,2820.11%+2,282
HELIX ACQUISITION CORP III USD0200,000+200,00002,1280.10%+2,128
AARDVARK THERAPEUTICS INC(Call)014,700+14,700085+85
SURROZEN INC4,4444,44401291150.01%-14
LAKEFRONT BIOTHERAPEUTICS NV(LKFT)1,667,1191,667,119050,01449,9802.43%-33
ZURA BIO LTD1,179,7151,179,71507,0196,9600.34%-59
PHATHOM PHARMACEUTICALS INC625,000625,00006,9446,7810.33%-162
MBX BIOSCIENCES INC(MBX)777,000388,500-388,50023,19321,4451.04%-1,748
HELIX ACQUISITION CORP III USD200,0000-200,0002,0320-2,032
IBIO INC1,583,0000-1,583,0003,0080-3,008
PRELUDE THERAPEUTICS INC947,0490-947,0493,2390-3,239
BRIDGEBIO ONCOLOGY THERAPEUT2,823,1262,823,126025,26721,5121.05%-3,755
MEREO BIOPHARMA GROUP PLC13,368,8551,000,000-12,368,8554,4123180.02%-4,094
RELAY THERAPEUTICS INC(RLAY)1,904,762697,948-1,206,81418,95213,0590.63%-5,894
REPLIMUNE GROUP INC(REPL)1,000,0000-1,000,0007,6500-7,650
EIKON THERAPEUTICS INC732,6060-732,6067,7510-7,751
ERASCA INC(ERAS)900,000330,000-570,00014,5626,0460.29%-8,516
ORIC PHARMACEUTICALS INC(ORIC)6,728,1166,728,116085,24572,8653.54%-12,380
CENTESSA PHARMACEUTICALS PLC(Call)410,8000-410,80016,3170-16,317
XENCOR INC(XNCR)2,183,0000-2,183,00026,3270-26,327
AKTIS ONCOLOGY INC(AKTS)4,824,4690-4,824,46986,3100-86,310
CRINETICS PHARMACEUTICALS IN(CRNX)4,288,1200-4,288,120155,7450-155,745
CENTESSA PHARMACEUTICALS PLC6,000,0000-6,000,000238,3200-238,320
JAZZ PHARMACEUTICALS PLC(JAZZ)1,706,4690-1,706,469322,6080-322,608
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