{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-24-277254","form_type":"8-K","ticker":"NEU","cik":"0001282637","company_name":"NEWMARKET CORP","filed_at":"2024-12-12T23:59:59+00:00","discovered_at":"2026-05-14T18:03:07.965676+00:00","generated_at":"2026-05-29T03:53:06.059140+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"NewMarket Corp authorizes $500M share repurchase program through Dec 2027","bullets":["Board approved new $500M buyback program, replacing existing $500M program expiring Dec 31, 2024.","Repurchases may occur in open market, private transactions, block trades, or Rule 10b5-1 plans.","Program runs through December 31, 2027; no minimum share purchase obligation.","Company may terminate or suspend the program at any time."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-24-277254","json":"https://secwatch.observer/filing/0001193125-24-277254.json","markdown":"https://secwatch.observer/filing/0001193125-24-277254.md","text":"https://secwatch.observer/filing/0001193125-24-277254.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1282637/000119312524277254/0001193125-24-277254-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1282637/000119312524277254/d883521d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-29T03:53:06.059140+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"}