Atara Biotherapeutics: EcoR1 Capital files initial beneficial ownership statement

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  • EcoR1 Capital filed Form 3 disclosing indirect beneficial ownership of 1,044,593 shares of Atara Biotherapeutics common stock.
  • Filing listed EcoR1 as a 10% owner, with event date May 7, 2026.
  • EcoR1 Capital Fund Qualified L.P. reported beneficial ownership of 970,829 shares within total stake.


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