{"schema_version":"secwatch.filing_event.v1","accession":"0001213900-24-071450","form_type":"8-K","ticker":null,"cik":"0001845459","company_name":"NKGen Biotech, Inc.","filed_at":"2024-08-21T23:59:59+00:00","discovered_at":"2026-05-14T18:03:14.871377+00:00","generated_at":"2026-05-31T08:18:18.640057+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"NKGen Biotech COO Pierre Gagnon resigns, stays as advisor through Nov 30","bullets":["Pierre Gagnon resigned as COO effective August 15, 2024; will remain as non-executive employee in transition role until November 30, 2024.","Resignation not due to any disagreements with the Company regarding operations, policies, or practices.","No successor has been named as of the filing date."],"urls":{"canonical":"https://secwatch.observer/filing/0001213900-24-071450","json":"https://secwatch.observer/filing/0001213900-24-071450.json","markdown":"https://secwatch.observer/filing/0001213900-24-071450.md","text":"https://secwatch.observer/filing/0001213900-24-071450.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1845459/000121390024071450/0001213900-24-071450-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1845459/000121390024071450/ea0211985-8k_nkgen.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-31T08:18:18.640057+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":"035f8fc826","claim":"Pierre Gagnon resigned as Chief Operating Officer at NKGen Biotech, Inc..","evidence_excerpt":"On August 15, 2024, Pierre Gagnon, who currently serves as Chief Operating Officer of NKGen Biotech, Inc. (the “Company”), notified the Company of his intent to resign from his role as Chief Operating Officer and as an officer of the Company, effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1845459/000121390024071450/0001213900-24-071450-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Chief Operating Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}