Atara Biotherapeutics, Inc. (NASDAQ:ATRA) Q1 2019 Earnings Conference Call May 9, 2019 8:30 AM ET Company Participants John Craighead - Vice President of Investor Relations and Corporate Communications Isaac Ciechanover - President and Chief Executive Officer Dietmar Berger - Global Head of Research and Development Utpal Koppikar - Chief Financial Officer Conference Call Participants Anupam Rama - JPMorgan John Newman - Canaccord Salim Syed - Mizuho Matt Phipps - William Blair Maryana Breitman - Goldman Sac ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-36548 | --- | --- | |------------------------------------------------------------------------------|--------------------------------------- ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-36548 | --- | --- | |-------------------------------------------------------------------------------------------------|-------------- ...