Fund Holdings — EcoR1 Capital, LLC

Total Portfolio Value
$2.34B
Total Bought
$381.06M
Total Sold
$240.99M
Net Transaction
+$140.07M
Filing Period:
Securities
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SharesValue ($K)
Q4 2025
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Q1 2026
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Change
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Q4 2025
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Q1 2026
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Weight (%)
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Change
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CENTESSA PHARMACEUTICALS PLC3,115,0006,000,000+2,885,00077,906238,32010.18%+160,414
AKTIS ONCOLOGY INC(AKTS)04,824,469+4,824,469086,3103.69%+86,310
ANAPTYSBIO INC7,880,0947,880,0940382,027437,03018.68%+55,003
CG ONCOLOGY INC(CGON)772,0001,102,000+330,00032,05374,5833.19%+42,530
JAZZ PHARMACEUTICALS PLC(JAZZ)1,706,4691,706,4690290,100322,60813.79%+32,508
ORIC PHARMACEUTICALS INC(ORIC)6,728,1166,728,116055,03685,2453.64%+30,209
ETON PHARMACEUTICALS INC(ETON)2,030,5442,171,938+141,39434,33653,6032.29%+19,267
RELAY THERAPEUTICS INC(RLAY)01,904,762+1,904,762018,9520.81%+18,952
ERASCA INC(ERAS)0900,000+900,000014,5620.62%+14,562
EIKON THERAPEUTICS INC(EIKN)0732,606+732,60607,7510.33%+7,751
REPLIMUNE GROUP INC(REPL)01,000,000+1,000,00007,6500.33%+7,650
ZURA BIO LTD(ZURA)01,179,715+1,179,71507,0190.30%+7,019
PHATHOM PHARMACEUTICALS INC(PHAT)0625,000+625,00006,9440.30%+6,944
STOKE THERAPEUTICS INC(STOK)0100,000+100,00003,2560.14%+3,256
PRELUDE THERAPEUTICS INC(PRLD)0947,049+947,04903,2390.14%+3,239
HELIX ACQUISITION CORP III USD(HLXC)0200,000+200,00002,0320.09%+2,032
MEREO BIOPHARMA GROUP PLC(MREO)7,856,46613,368,855+5,512,3893,2744,4120.19%+1,138
SURROZEN INC(SRZN)4,4444,44401001290.01%+29
NEUROGENE INC(NGNE)1,271,3421,271,342026,19025,6301.10%-559
IBIO INC(IBIO)2,228,0001,583,000-645,0004,3003,0080.13%-1,292
CAMP4 THERAPEUTICS CORP(CAMP)325,0000-325,0001,9920—-1,992
EVOLUS INC(EOLS)675,0000-675,0004,4890—-4,489
GALAPAGOS NV(LKFT)1,667,1191,667,119054,51550,0142.14%-4,501
CRISPR THERAPEUTICS AG(CRSP)1,389,2761,389,276072,85466,0882.82%-6,766
NUVATION BIO INC(NUVB)963,3330-963,3338,6310—-8,631
MANNKIND CORP(MNKD)1,660,0000-1,660,0009,4120—-9,412
ATARA BIOTHERAPEUTICS INC573,18399,593-473,59010,3694710.02%-9,898
BRIDGEBIO ONCOLOGY THERAPEUT(BBOT)2,823,1262,823,126035,34625,2671.08%-10,079
ZENAS BIOPHARMA INC(ZBIO)789,500789,500028,66715,4350.66%-13,232
VOYAGER THERAPEUTICS INC(VYGR)4,002,8470-4,002,84715,7310—-15,731
AQUESTIVE THERAPEUTICS INC2,625,0000-2,625,00016,9580—-16,957
VAXCYTE INC(PCVX)450,0000-450,00020,7630—-20,763
STRUCTURE THERAPEUTICS INC334,3800-334,38023,2560—-23,256
XENCOR INC(XNCR)3,251,1122,183,000-1,068,11249,77526,3271.13%-23,448
ZYMEWORKS INC(ZYME)22,970,38822,970,3880604,810575,17924.58%-29,632
MBX BIOSCIENCES INC(MBX)2,123,604777,000-1,346,60466,97823,1930.99%-43,785
CRINETICS PHARMACEUTICALS IN(CRNX)4,288,1204,288,1200199,612155,7456.66%-43,867
IMMUNOME INC(IMNM)2,855,5900-2,855,59061,3380—-61,338
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EcoR1 Capital, LLC — 13F Holdings — Q1 2026 | TickerTrail