Atara Biotherapeutics(ATRA) - 2025 Q2 - Quarterly Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q | Title of Each Class | Trading Symbol(s) | Name of Each Exchange on Which Registered | | --- | --- | --- | | Common Stock, par value $0.0001 per share | ATRA | The Nasdaq Stock Market LLC | ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the tr ...