{"schema_version":"secwatch.filing_event.v1","accession":"0000104889-21-000058","form_type":"8-K","ticker":"GHC","cik":"0000104889","company_name":"Graham Holdings Co","filed_at":"2021-12-23T23:59:59+00:00","discovered_at":"2026-05-14T18:04:11.264433+00:00","generated_at":"2026-06-27T22:28:53.673757+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Director Jack Markell resigns from Graham Holdings Board, effective Dec 31, 2021","bullets":["Jack A. Markell resigned from the Board effective December 31, 2021.","Resignation due to confirmation as US Ambassador to the OECD.","No disagreement with the Company's operations, policies, or practices."],"urls":{"canonical":"https://secwatch.observer/filing/0000104889-21-000058","json":"https://secwatch.observer/filing/0000104889-21-000058.json","markdown":"https://secwatch.observer/filing/0000104889-21-000058.md","text":"https://secwatch.observer/filing/0000104889-21-000058.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/104889/000010488921000058/0000104889-21-000058-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/104889/000010488921000058/ghc-20211221.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-27T22:28:53.673757+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":"d386d68dc5","claim":"Jack A. Markell resigned as Director at Graham Holdings Co.","evidence_excerpt":"On December 21, 2021, Jack A. Markell resigned from the Board of Directors of Graham Holdings Company (the “Company”) effective December 31, 2021.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/104889/000010488921000058/0000104889-21-000058-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"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"}