---
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"
generated_at: "2026-05-17T11:39:28.424718+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Marten Transport CEO Kohl to retire Sept 30; Randolph Marten appointed Chairman & CEO

## Summary
- 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.

## SEC filing metadata
- 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
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- 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

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-25-027355
- JSON: https://secwatch.observer/filing/0001437749-25-027355.json
- Plain text: https://secwatch.observer/filing/0001437749-25-027355.txt

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