{"schema_version":"secwatch.filing_event.v1","accession":"0001437749-26-021135","form_type":"8-K","ticker":"MRTN","cik":"0000799167","company_name":"MARTEN TRANSPORT LTD","filed_at":"2026-06-18T20:01:54+00:00","discovered_at":"2026-06-18T20:03:00.376736+00:00","generated_at":"2026-06-18T20:08:59.887767+00:00","sec_items":["1.01","2.03","9.01"],"event_type":"debt","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Marten Transport amends credit facility, increases letter of credit sublimit to $35M and aggregate capacity to $105M","bullets":["Letter of credit sublimit raised from $30M to $35M under existing unsecured revolving credit facility.","Maximum aggregate principal amount increased from $100M to $105M via accordion feature.","Amended and Restated Revolving Note for $35M replaces prior $30M note; U.S. Bank remains sole lender.","Facility terms otherwise unchanged; proceeds for general corporate and working capital purposes."],"urls":{"canonical":"https://secwatch.observer/filing/0001437749-26-021135","json":"https://secwatch.observer/filing/0001437749-26-021135.json","markdown":"https://secwatch.observer/filing/0001437749-26-021135.md","text":"https://secwatch.observer/filing/0001437749-26-021135.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/799167/000143774926021135/0001437749-26-021135-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/799167/000143774926021135/mrtn20260617_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-18T20:08:59.887767+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":"e7626a0a64b64ec50240d442077e248fb2fb4c3e","claim":"MARTEN TRANSPORT LTD amended credit facility of maximum aggregate principal amount of up to $105 million with U.S. Bank National Association.","evidence_excerpt":"On June 12, 2026, Marten entered into the First Amendment to Credit Agreement (the “Amendment”) to increase the sublimit for the issuance of letters of credit from $30 million to $35 million and increase the maximum aggregate principal amount from $100 million to $105 million.","evidence_source":"SEC 8-K Item 2.03/2.04","evidence_url":"https://www.sec.gov/Archives/edgar/data/799167/000143774926021135/0001437749-26-021135-index.htm","confidence":0.9,"family_label":"Debt Financings","details":[{"label":"Instrument","value":"credit facility"},{"label":"Principal","value":"maximum aggregate principal amount of up to $105 million"},{"label":"Counterparty","value":"U.S. Bank National Association"},{"label":"Event","value":"amendment"}],"fact_type":"debt_financing"},{"claim_id":"25f9c499d484e75203b80a1f2d157c37300b3817","claim":"MARTEN TRANSPORT LTD amended First Amendment to Credit Agreement with U.S. Bank National Association, as agent, and certain banks party thereto (effective 2026-06-12).","evidence_excerpt":"On June 12, 2026, Marten entered into the First Amendment to Credit Agreement (the “Amendment”) to increase the sublimit for the issuance of letters of credit from $30 million to $35 million and increase the maximum aggregate principal amount from $100 million to $105 million.","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/799167/000143774926021135/0001437749-26-021135-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"amendment"},{"label":"Agreement","value":"credit facility"},{"label":"Counterparty","value":"U.S. Bank National Association, as agent, and certain banks party thereto"},{"label":"Effective","value":"2026-06-12"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}