EcoR1 Capital, LLC — insider trades

Stock trades EcoR1 Capital, LLC reported on SEC Form 4 at ATRA Atara Biotherapeutics, Inc., TRAX First Tracks Biotherapeutics, Inc., AKTS Aktis Oncology, Inc., ADAP Adaptimmune Therapeutics PLC, ZYME Zymeworks Inc..

• May 7, 2026: bought 507,407 shares of ATRA Atara Biotherapeutics, Inc. ($4.74M)
• Apr 20, 2026: sold 4,705,575 shares of TRAX First Tracks Biotherapeutics, Inc. ($65.0M)
• Jan 12, 2026: bought 2,222,222 shares of AKTS Aktis Oncology, Inc. ($40.0M)
• Jul 30, 2025: sold 64,052,538 shares of ADAP Adaptimmune Therapeutics PLC ($6.74M)
• May 19, 2025: bought 55,421 shares of ZYME Zymeworks Inc. ($636K)
• May 15, 2025: bought 4,958,978 shares of ITOS iTeos Therapeutics, Inc. ($38.7M)
• May 6, 2025: sold 6,279,684 shares of PRTA PROTHENA CORP PUBLIC LTD CO ($50.8M)
• Apr 17, 2025: bought 128,713 shares of ZYME Zymeworks Inc. ($1.46M)
• Apr 4, 2025: bought 317,208 shares of ZYME Zymeworks Inc. ($3.62M)
• Apr 2, 2025: bought 127,415 shares of ZYME Zymeworks Inc. ($1.50M)