---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-21-023898"
form_type: "8-K"
ticker: "MRTN"
cik: "0000799167"
company_name: "MARTEN TRANSPORT LTD"
filed_at: "2021-10-19T23:59:59+00:00"
generated_at: "2026-06-28T20:08:41.408093+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Marten Transport Q3 net income up 17.9% to $21.3M; record revenue $251.3M

## Summary
- Diluted EPS of $0.26 vs $0.22 in Q3 2020, a 18.2% increase.
- Operating revenue rose 16.3% to a record $251.3M; ex-fuel surcharges revenue +12.8% to $221.2M.
- Operating income improved 16.8% to $28.5M; operating margin (ex-fuel) improved to 87.1% from 87.6%.
- Ended Q3 with 181 more drivers than start of quarter; refrigerated container fleet grew to 607.
- First nine months net income up 21.6% to $60.7M ($0.73 per diluted share).

## SEC filing metadata
- accession: 0001437749-21-023898
- form_type: 8-K
- ticker: MRTN
- cik: 0000799167
- company_name: MARTEN TRANSPORT LTD
- filed_at: 2021-10-19T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/799167/000143774921023898/0001437749-21-023898-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/799167/000143774921023898/mrtn20211017_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-21-023898
- JSON: https://secwatch.observer/filing/0001437749-21-023898.json
- Plain text: https://secwatch.observer/filing/0001437749-21-023898.txt

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