---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-26-028920"
form_type: "8-K"
ticker: "MRTN"
cik: "0000799167"
company_name: "MARTEN TRANSPORT LTD"
filed_at: "2026-08-25T20:19:16+00:00"
generated_at: "2026-08-25T20:20:10.134281+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Marten Transport amends credit agreement; extends term to 2031, raises LC limit to $50M

## Summary
- On Aug 19, 2026, entered Second Amendment to Credit Agreement with U.S. Bank and banks.
- Extends facility term to Aug 19, 2031; reduces max aggregate principal from $105M to $100M.
- Letter of credit sublimit increased from $35M to $50M; provides $50M Second Amended Revolving Note.
- Also updates applicable margins for Term SOFR advances.
- Original facility was $30M unsecured revolving credit with $30M LC sublimit (2022).

## SEC filing metadata
- accession: 0001437749-26-028920
- form_type: 8-K
- ticker: MRTN
- cik: 0000799167
- company_name: MARTEN TRANSPORT LTD
- filed_at: 2026-08-25T20:19:16+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 1.01, 2.03
- EDGAR index: https://www.sec.gov/Archives/edgar/data/799167/000143774926028920/0001437749-26-028920-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/799167/000143774926028920/mrtn20260825_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-26-028920
- JSON: https://secwatch.observer/filing/0001437749-26-028920.json
- Plain text: https://secwatch.observer/filing/0001437749-26-028920.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.