Fund Holdings — EcoR1 Capital, LLC

Total Portfolio Value:
$2.19B
Total Bought:
$205.38M
Total Sold:
$555.20M
Net Transaction:
-$349.82M
Notable People:
Scott Eric Perlen
Securities
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SharesValue
Q3 2025
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Q4 2025
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Change
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Q3 2025
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Q4 2025
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Weight (%)
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Change
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Zymeworks Inc.(ZYME)22,970,38822,970,3880$392.33M$604.81M27.61%+$212.48M
Anaptysbio Inc7,880,0947,880,0940$241.29M$382.03M17.44%+$140.74M
Jazz Pharmaceuticals plcSHS USD(JAZZ)1,706,4691,706,4690$224.91M$290.10M13.24%+$65.19M
Crinetics Pharmaceuticals In4,288,1204,288,1200$178.60M$199.61M9.11%+$21.01M
Centessa Pharmaceuticals PlcADS550,0003,115,000+2,565,000$13.34M$77.91M3.56%+$64.57M
CRISPR Therapeutics AGNAMEN AKT(CRSP)1,389,2761,389,2760$90.04M$72.85M3.33%-$17.19M
MBX Biosciences, Inc.(MBX)2,123,6042,123,6040$37.16M$66.98M3.06%+$29.82M
Immunome, Inc.(IMNM)4,079,4152,855,590-1,223,825$47.77M$61.34M2.80%+$13.57M
ORIC Pharmaceuticals, Inc.(ORIC)6,728,1166,728,1160$80.74M$55.04M2.51%-$25.70M
Lakefront Biotherapeutics NVADR(LKFT)1,667,1191,667,1190$57.75M$54.51M2.49%-$3.23M
Xencor, Inc.(XNCR)6,144,7673,251,112-2,893,655$72.08M$49.77M2.27%-$22.30M
BridgeBio Oncology Therapeutics, Inc.(BBOT)2,823,1262,823,1260$32.69M$35.35M1.61%+$2.65M
Eton Pharmaceuticals, Inc.(ETON)2,030,5442,030,5440$44.12M$34.34M1.57%-$9.79M
CG Oncology, Inc.(CGON)0772,000+772,000$0$32.05M1.46%+$32.05M
Zenas BioPharma, Inc.(ZBIO)0789,500+789,500$0$28.67M1.31%+$28.67M
Neurogene Inc.(NGNE)1,271,3421,271,3420$22.03M$26.19M1.20%+$4.16M
Structure Therapeutics IncADS0334,380+334,380$0$23.26M1.06%+$23.26M
Vaxcyte, Inc.(PCVX)0450,000+450,000$0$20.76M0.95%+$20.76M
Aquestive Therapeutics Inc2,625,0002,625,0000$14.67M$16.96M0.77%+$2.28M
Voyager Therapeutics, Inc.(VYGR)670,3034,002,847+3,332,544$3.13M$15.73M0.72%+$12.60M
Atara Biotherapeutics Inc573,183573,1830$8.21M$10.37M0.47%+$2.16M
MannKind Corporation(MNKD)01,660,000+1,660,000$0$9.41M0.43%+$9.41M
Nuvation Bio Inc.W EXP 02 10 202(NUVB)963,333963,3330$3.56M$8.63M0.39%+$5.07M
Evolus, Inc.(EOLS)0675,000+675,000$0$4.49M0.20%+$4.49M
iBio, Inc.(IBIO)02,228,000+2,228,000$0$4.30M0.20%+$4.30M
Mereo BioPharma Group plcADS(MREO)07,856,466+7,856,466$0$3.27M0.15%+$3.27M
CAMP4 THERAPEUTICS CORPORATION(CAMP)0325,000+325,000$0$1.99M0.09%+$1.99M
Surrozen, Inc.W EXP 08 01 203(SRZN)66,6654,444-62,221$859.3K$100.4K0.00%-$758.9K
Alkermes plcSHS(ALKS)500,0000-500,000$15.00M$0—-$15.00M
Apellis Pharmaceuticals Inc
COM
3,447,1560-3,447,156$78.01M$0—-$78.01M
Avidity Biosciences Inc765,0000-765,000$33.33M$0—-$33.33M
COMPASS Pathways plcADS(CMPS)265,1370-265,137$1.52M$0—-$1.52M
Kura Oncology, Inc.(KURA)872,5000-872,500$7.72M$0—-$7.72M
Madrigal Pharmaceuticals, Inc.(MDGL)75,0000-75,000$34.40M$0—-$34.40M
Metsera Inc271,5290-271,529$14.21M$0—-$14.21M
PepGen Inc.(PEPG)800,0000-800,000$3.70M$0—-$3.70M
Prime Medicine, Inc.(PRME)1,543,3260-1,543,326$8.55M$0—-$8.55M
Tango Therapeutics, Inc.(TNGX)10,630,7360-10,630,736$89.30M$0—-$89.30M
uniQure N.V.SHS(QURE)3,988,9710-3,988,971$232.84M$0—-$232.84M
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EcoR1 Capital, LLC — 13F Holdings — Q4 2025 | TickerTrail