The Analysis of EcoR1 Capital, LLC's Holdings


Currently, EcoR1 Capital, LLC holds 28 types of securities in its portfolio with a total value $2.2B. In the most recent quarter, they have increased their positions in N/A (+23.0M shares, valued at $604.8M), ANAB (+7.9M shares, valued at $382.0M), JAZZ (+1.7M shares, valued at $290.1M); initiated new positions in N/A (+23.0M shares, valued at $604.8M), ANAB (+7.9M shares, valued at $382.0M), JAZZ (+1.7M shares, valued at $290.1M).


Top Holding Treemap

Stock Holdings
TickerCompany NameSharesShares â–ŗ%Event DateReport DateHistory
ZYMEWORKS INC ZYMEWORKS INC23.0M sharesnew addition2025-12-312026-02-17history
ANAB ANAPTYSBIO INC7.9M sharesnew addition2025-12-312026-02-17history
JAZZ JAZZ PHARMACEUTICALS PLC1.7M sharesnew addition2025-12-312026-02-17history
CRNX CRINETICS PHARMACEUTICALS IN4.3M sharesnew addition2025-12-312026-02-17history
CNTA CENTESSA PHARMACEUTICALS PLC3.1M sharesnew addition2025-12-312026-02-17history
CRSP CRISPR THERAPEUTICS AG1.4M sharesnew addition2025-12-312026-02-17history
MBX MBX BIOSCIENCES INC2.1M sharesnew addition2025-12-312026-02-17history
IMNM IMMUNOME INC2.9M sharesnew addition2025-12-312026-02-17history
Sponsored
ORIC ORIC PHARMACEUTICALS INC6.7M sharesnew addition2025-12-312026-02-17history
GLPG GALAPAGOS NV1.7M sharesnew addition2025-12-312026-02-17history
XNCR XENCOR INC3.3M sharesnew addition2025-12-312026-02-17history
MREO MEREO BIOPHARMA GROUP PLC74.5M shares848.26%2026-01-022026-01-09history
BRIDGEBIO ONCOLOGY THERAPEUT BRIDGEBIO ONCOLOGY THERAPEUT2.8M sharesnew addition2025-12-312026-02-17history
ETON ETON PHARMACEUTICALS INC2.0M sharesnew addition2025-12-312026-02-17history
CGON CG ONCOLOGY INC772.0K sharesnew addition2025-12-312026-02-17history
ZBIO ZENAS BIOPHARMA INC789.5K sharesnew addition2025-12-312026-02-17history
Sponsored
NGNE NEUROGENE INC1.3M sharesnew addition2025-12-312026-02-17history
GPCR STRUCTURE THERAPEUTICS INC334.4K sharesnew addition2025-12-312026-02-17history
PCVX VAXCYTE INC450.0K sharesnew addition2025-12-312026-02-17history
AQST AQUESTIVE THERAPEUTICS INC2.6M sharesnew addition2025-12-312026-02-17history
VYGR VOYAGER THERAPEUTICS INC4.0M sharesnew addition2025-12-312026-02-17history
ATARA BIOTHERAPEUTICS INC ATARA BIOTHERAPEUTICS INC573.2K sharesnew addition2025-12-312026-02-17history
MNKD MANNKIND CORP1.7M sharesnew addition2025-12-312026-02-17history
NUVB.WS NUVATION BIO INC963.3K sharesnew addition2025-12-312026-02-17history
Sponsored
EOLS EVOLUS INC675.0K sharesnew addition2025-12-312026-02-17history
IBIO INC IBIO INC2.2M shares0.00%2025-12-312026-02-17history
CAMP CAMP4 THERAPEUTICS CORP325.0K sharesnew addition2025-12-312026-02-17history
SRZNW SURROZEN INC4.4K sharesnew addition2025-12-312026-02-17history

Call Option Holdings
CGON Call CallCG ONCOLOGY INC292.8K sharesnew addition2025-12-312026-02-17history
XNCR Call CallXENCOR INC67.5K sharesnew addition2025-12-312026-02-17history

Put Option Holdings
No put option holdings data available