{"schema_version":"secwatch.filing_event.v1","accession":"0000354190-26-000184","form_type":"8-K","ticker":"AJG","cik":"0000354190","company_name":"Arthur J. Gallagher & Co.","filed_at":"2026-07-29T12:12:35+00:00","discovered_at":"2026-07-29T12:15:02.381805+00:00","generated_at":"2026-07-29T12:15:15.344349+00:00","sec_items":["8.01","9.01"],"event_type":"leadership","sentiment":"negative","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Arthur J. Gallagher & Co. Announces Passing of Lead Independent Director David Johnson","bullets":["David Johnson, Lead Independent Director, passed away on July 22, 2026.","Board reduced its size from nine to eight members following Mr. Johnson's death.","Ralph Nicoletti elected as new Lead Independent Director, effective immediately.","John Coldman appointed to the Compensation and Nominating/Governance Committees.","Press release dated July 29, 2026, announced the passing and board changes."],"urls":{"canonical":"https://secwatch.observer/filing/0000354190-26-000184","json":"https://secwatch.observer/filing/0000354190-26-000184.json","markdown":"https://secwatch.observer/filing/0000354190-26-000184.md","text":"https://secwatch.observer/filing/0000354190-26-000184.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/354190/000035419026000184/0000354190-26-000184-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/354190/000035419026000184/ajg-20260722.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-07-29T12:15:15.344349+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}