{"schema_version":"secwatch.filing_event.v1","accession":"0000104889-23-000023","form_type":"8-K","ticker":"GHC","cik":"0000104889","company_name":"Graham Holdings Co","filed_at":"2023-03-23T23:59:59+00:00","discovered_at":"2026-05-14T18:03:43.662704+00:00","generated_at":"2026-06-17T17:29:54.744623+00:00","sec_items":["8.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Graham Holdings: Don Graham becomes Chairman Emeritus; Anne Mulcahy elected Chair","bullets":["Donald E. Graham transitions from Chairman to Chairman Emeritus, effective May 2023.","Anne Mulcahy, former Xerox CEO and GHC board member since 2008, elected Chair.","Mulcahy also serves on boards of Johnson & Johnson and LPL Financial.","President and CEO Tim O'Shaughnessy expressed confidence in the new leadership structure."],"urls":{"canonical":"https://secwatch.observer/filing/0000104889-23-000023","json":"https://secwatch.observer/filing/0000104889-23-000023.json","markdown":"https://secwatch.observer/filing/0000104889-23-000023.md","text":"https://secwatch.observer/filing/0000104889-23-000023.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/104889/000010488923000023/0000104889-23-000023-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/104889/000010488923000023/ghc-20230323.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-17T17:29:54.744623+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"}