Fund Holdings — EcoR1 Capital, LLC

Total Portfolio Value:
$2.34B
Total Bought:
$381.06M
Total Sold:
$240.99M
Net Transaction:
+$140.07M
Notable People:
Scott Eric Perlen
Securities
▲▼
SharesValue
Q4 2025
▲▼
Q1 2026
▲▼
Change
▲▼
Q4 2025
▲▼
Q1 2026
▲▼
Weight (%)
▲▼
Change
▲▼
Zymeworks Inc.(ZYME)22,970,38822,970,3880$604.81M$575.18M24.58%-$29.63M
Anaptysbio Inc7,880,0947,880,0940$382.03M$437.03M18.68%+$55.00M
Jazz Pharmaceuticals plcSHS USD(JAZZ)1,706,4691,706,4690$290.10M$322.61M13.79%+$32.51M
Centessa Pharmaceuticals PlcADS3,115,0006,000,000+2,885,000$77.91M$238.32M10.18%+$160.41M
Crinetics Pharmaceuticals In4,288,1204,288,1200$199.61M$155.74M6.66%-$43.87M
Aktis Oncology, Inc.COM ADDED(AKTS)04,824,469+4,824,469$0$86.31M3.69%+$86.31M
ORIC Pharmaceuticals, Inc.(ORIC)6,728,1166,728,1160$55.04M$85.25M3.64%+$30.21M
CG Oncology, Inc.(CGON)772,0001,102,000+330,000$32.05M$74.58M3.19%+$42.53M
CRISPR Therapeutics AGNAMEN AKT(CRSP)1,389,2761,389,2760$72.85M$66.09M2.82%-$6.77M
Eton Pharmaceuticals, Inc.(ETON)2,030,5442,171,938+141,394$34.34M$53.60M2.29%+$19.27M
Lakefront Biotherapeutics NVADR(LKFT)1,667,1191,667,1190$54.51M$50.01M2.14%-$4.50M
Xencor, Inc.(XNCR)3,251,1122,183,000-1,068,112$49.77M$26.33M1.13%-$23.45M
Neurogene Inc.(NGNE)1,271,3421,271,3420$26.19M$25.63M1.10%-$559.4K
BridgeBio Oncology Therapeutics, Inc.(BBOT)2,823,1262,823,1260$35.35M$25.27M1.08%-$10.08M
MBX Biosciences, Inc.(MBX)2,123,604777,000-1,346,604$66.98M$23.19M0.99%-$43.79M
Relay Therapeutics, Inc.(RLAY)01,904,762+1,904,762$0$18.95M0.81%+$18.95M
Zenas BioPharma, Inc.(ZBIO)789,500789,5000$28.67M$15.43M0.66%-$13.23M
Erasca, Inc.(ERAS)0900,000+900,000$0$14.56M0.62%+$14.56M
Eikon Therapeutics, Inc.COM ADDED(EIKN)0732,606+732,606$0$7.75M0.33%+$7.75M
Replimune Group, Inc.(REPL)01,000,000+1,000,000$0$7.65M0.33%+$7.65M
Zura Bio LimitedCL A(ZURA)01,179,715+1,179,715$0$7.02M0.30%+$7.02M
Phathom Pharmaceuticals, Inc.(PHAT)0625,000+625,000$0$6.94M0.30%+$6.94M
Mereo BioPharma Group plcADS(MREO)7,856,46613,368,855+5,512,389$3.27M$4.41M0.19%+$1.14M
Stoke Therapeutics, Inc.(STOK)0100,000+100,000$0$3.26M0.14%+$3.26M
Prelude Therapeutics Incorporated(PRLD)0947,049+947,049$0$3.24M0.14%+$3.24M
iBio, Inc.(IBIO)2,228,0001,583,000-645,000$4.30M$3.01M0.13%-$1.29M
Helix Acquisition Corp. IIICL A(HLXC)0200,000+200,000$0$2.03M0.09%+$2.03M
Atara Biotherapeutics Inc573,18399,593-473,590$10.37M$471.1K0.02%-$9.90M
Surrozen, Inc.W EXP 08 01 203(SRZN)4,4444,4440$100.4K$129.5K0.01%+$29.0K
Aquestive Therapeutics Inc2,625,0000-2,625,000$16.96M$0—-$16.96M
CAMP4 THERAPEUTICS CORPORATION(CAMP)325,0000-325,000$1.99M$0—-$1.99M
Evolus, Inc.(EOLS)675,0000-675,000$4.49M$0—-$4.49M
Immunome, Inc.(IMNM)2,855,5900-2,855,590$61.34M$0—-$61.34M
MannKind Corporation(MNKD)1,660,0000-1,660,000$9.41M$0—-$9.41M
Nuvation Bio Inc.W EXP 02 10 202(NUVB)963,3330-963,333$8.63M$0—-$8.63M
Structure Therapeutics IncADS334,3800-334,380$23.26M$0—-$23.26M
Vaxcyte, Inc.(PCVX)450,0000-450,000$20.76M$0—-$20.76M
Voyager Therapeutics, Inc.(VYGR)4,002,8470-4,002,847$15.73M$0—-$15.73M
Page 1 of 1
EcoR1 Capital, LLC — 13F Holdings — Q1 2026 | TickerTrail