---
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"
generated_at: "2026-06-11T06:39:15.448722+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Marten Transport adopts amended bylaws with advance notice provisions for shareholder proposals

## Summary
- 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.

## SEC filing metadata
- 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
- event_type: other
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 5.03, 9.01
- 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

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-23-024282
- JSON: https://secwatch.observer/filing/0001437749-23-024282.json
- Plain text: https://secwatch.observer/filing/0001437749-23-024282.txt

## Key facts
- Governance Changes
  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).
  - Change: bylaw amendment
  - Effective: 2023-08-15
  source text: 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_url: https://www.sec.gov/Archives/edgar/data/799167/000143774923024282/0001437749-23-024282-index.htm

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