{"schema_version":"secwatch.filing_event.v1","accession":"0001437749-25-027355","form_type":"8-K","ticker":"MRTN","cik":"0000799167","company_name":"MARTEN TRANSPORT LTD","filed_at":"2025-08-19T23:59:59+00:00","discovered_at":"2026-05-14T18:02:46.406019+00:00","generated_at":"2026-05-17T11:39:28.424718+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Marten Transport CEO Kohl to retire Sept 30; Randolph Marten appointed Chairman & CEO","bullets":["CEO Timothy Kohl retiring effective Sept 30, 2025; company thanks him for his tenure.","Executive Chairman Randolph Marten, 72, named Chairman of the Board and CEO effective Oct 1, 2025.","Marten has been with Marten Transport since 1974; previously served as CEO from 2005 to 2021.","No material compensatory changes for Marten in connection with appointment; existing arrangements unchanged."],"urls":{"canonical":"https://secwatch.observer/filing/0001437749-25-027355","json":"https://secwatch.observer/filing/0001437749-25-027355.json","markdown":"https://secwatch.observer/filing/0001437749-25-027355.md","text":"https://secwatch.observer/filing/0001437749-25-027355.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/799167/000143774925027355/0001437749-25-027355-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/799167/000143774925027355/mrtn20250819_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T11:39:28.424718+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"}