{"schema_version":"secwatch.filing_event.v1","accession":"0001125345-23-000011","form_type":"8-K","ticker":"MGNX","cik":"0001125345","company_name":"MACROGENICS INC","filed_at":"2023-01-05T23:59:59+00:00","discovered_at":"2026-05-14T18:03:43.928855+00:00","generated_at":"2026-06-20T19:18:51.542999+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"MacroGenics appoints Dr. Margaret Liu and Meenu Chhabra Karson to Board of Directors","bullets":["Appointments effective January 3, 2023; Liu joins Science & Tech Committee, Karson joins Audit Committee.","Board expands to ten directors, nine of whom are independent.","Dr. Liu is a gene therapy, vaccines, and immunotherapy expert; former exec at Merck and Chiron.","Meenu Chhabra Karson is a biopharma executive; previously CEO of Proteostasis Therapeutics and led its IPO.","Karson received an option to purchase 36,000 shares vesting monthly over 36 months."],"urls":{"canonical":"https://secwatch.observer/filing/0001125345-23-000011","json":"https://secwatch.observer/filing/0001125345-23-000011.json","markdown":"https://secwatch.observer/filing/0001125345-23-000011.md","text":"https://secwatch.observer/filing/0001125345-23-000011.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1125345/000112534523000011/0001125345-23-000011-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1125345/000112534523000011/mgnx-20230103.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-20T19:18:51.542999+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":"db790d5454","claim":"Meenu Chhabra Karson was appointed as Director at MACROGENICS INC.","evidence_excerpt":"On January 3, 2023, the Board of Directors (the \"Board\") of MacroGenics, Inc. (the \"Company\") approved the appointment of Meenu Chhabra Karson to serve as a director on the Board, effective January 3, 2023 (the “Effective Date”).","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534523000011/0001125345-23-000011-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"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"}