{"schema_version":"secwatch.filing_event.v1","accession":"0001437749-23-024282","form_type":"8-K","ticker":"MRTN","cik":"0000799167","company_name":"MARTEN TRANSPORT LTD","filed_at":"2023-08-21T23:59:59+00:00","discovered_at":"2026-05-14T18:03:36.677367+00:00","generated_at":"2026-06-11T06:39:15.448722+00:00","sec_items":["5.03","9.01"],"event_type":"other","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"high","headline":"Marten Transport adopts amended bylaws with advance notice provisions for shareholder proposals","bullets":["Effective August 15, 2023, Board adopted Amended and Restated Bylaws.","Advance notice for nominations/proposals now must be received 90-120 days prior to annual meeting anniversary.","Notice must include detailed info on nominees, stock ownership, voting commitments, and legal proceedings.","Amendments also reflect technical changes required by SEC universal proxy rules."],"urls":{"canonical":"https://secwatch.observer/filing/0001437749-23-024282","json":"https://secwatch.observer/filing/0001437749-23-024282.json","markdown":"https://secwatch.observer/filing/0001437749-23-024282.md","text":"https://secwatch.observer/filing/0001437749-23-024282.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/799167/000143774923024282/0001437749-23-024282-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/799167/000143774923024282/mrtn20230818_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-11T06:39:15.448722+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":"5b10d84a5f054827f794cd038ef9c292bff7b96e","claim":"MARTEN TRANSPORT LTD: Adopted Amended and Restated Bylaws updating advance notice provisions for nominations and shareholder proposals, and making technical changes for universal proxy rules (effective 2023-08-15).","evidence_excerpt":"On August 15, 2023, the Board of Directors of Marten Transport, Ltd. (the “Company”) approved and adopted Amended and Restated Bylaws (the “Amended and Restated Bylaws”), effective immediately.","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/799167/000143774923024282/0001437749-23-024282-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"bylaw amendment"},{"label":"Effective","value":"2023-08-15"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}