EcoR1 Capital Expands Position in Atara Biotherapeutics with $4.74 Million Purchase
EcoR1 Capital, LLC has increased its stake in Atara Biotherapeutics, Inc. (NASDAQ: ATRA) through a substantial acquisition of common stock. On May 7, 2026, the investment firm purchased 507,407 shares, representing a total transaction value of approximately $4,744,255. This move reinforces EcoR1 Capital's position as a major shareholder in the biot…