ATRA - Atara gains after insider purchase July, 22 2025 03:02 PM Atara Biotherapeutics Inc. 2025-07-22 15:02:37 ET More on Atara Biotherapeutics Atara Biotherapeutics prices $16M public offering Atara Biotherapeutics to reduce workforce by 30% Seeking Alpha’s Quant Rating on Atara Biotherapeutics Historical earnings data for Atara Biotherapeutics Financial information for Atara Biotherapeutics For further details see: Atara gains after insider purchase