{"schema_version":"secwatch.filing_event.v1","accession":"0000950157-25-000633","form_type":"8-K","ticker":"MLM","cik":"0000916076","company_name":"MARTIN MARIETTA MATERIALS INC","filed_at":"2025-08-07T23:59:59+00:00","discovered_at":"2026-05-14T18:02:46.693603+00:00","generated_at":"2026-05-17T18:45:40.377882+00:00","sec_items":["1.01","9.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":0.85,"calibrated_materiality_score":0.85,"confidence":"high","headline":"Martin Marietta swaps cement assets for Quikrete aggregates and $450M cash","bullets":["Martin Marietta transfers its Midlothian cement plant and North Texas ready-mix concrete operations to Quikrete.","Martin Marietta receives Quikrete's aggregates operations in Virginia, Missouri, Kansas, and Western Canada plus $450M.","Closing conditioned on HSR and Canadian Competition Act approvals; outside date August 3, 2026 (3-month extension possible).","Exchange includes customary reps, warranties, covenants, non-compete, and indemnification provisions."],"urls":{"canonical":"https://secwatch.observer/filing/0000950157-25-000633","json":"https://secwatch.observer/filing/0000950157-25-000633.json","markdown":"https://secwatch.observer/filing/0000950157-25-000633.md","text":"https://secwatch.observer/filing/0000950157-25-000633.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/916076/000095015725000633/0000950157-25-000633-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/916076/000095015725000633/form8-k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T18:45:40.377882+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"}