{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-24-038690","form_type":"8-K","ticker":"ATRA","cik":"0001604464","company_name":"Atara Biotherapeutics, Inc.","filed_at":"2024-03-29T23:59:59+00:00","discovered_at":"2026-05-14T18:03:24.784170+00:00","generated_at":"2026-06-04T05:21:59.522833+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"high","headline":"Director Eric Dobmeier to not stand for re-election at Atara's 2024 annual meeting","bullets":["Eric Dobmeier notified Atara on March 26, 2024, he will not stand for re-election at the 2024 annual meeting.","He will continue as director until his term expires at the 2024 Annual Meeting.","No disagreement with Board or management; decision not related to operations, policies, or practices."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-24-038690","json":"https://secwatch.observer/filing/0000950170-24-038690.json","markdown":"https://secwatch.observer/filing/0000950170-24-038690.md","text":"https://secwatch.observer/filing/0000950170-24-038690.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1604464/000095017024038690/0000950170-24-038690-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1604464/000095017024038690/atra-20240326.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-04T05:21:59.522833+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"a77ca9aeeb","claim":"Eric Dobmeier departed as Director at Atara Biotherapeutics, Inc..","evidence_excerpt":"On March 26, 2024, Eric Dobmeier, a member of the Board of Directors (the “Board”) of Atara Biotherapeutics, Inc., a Delaware corporation (the “Company”), notified the Company of his decision to not stand for re-election to the Board at the Company’s 2024 annual meeting of stockholders (“2024 Annual Meeting”).","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1604464/000095017024038690/0000950170-24-038690-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"not stand for re-election"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}