Adam Daniel Phillips - 05 May 2026 Form 4 Insider Report for MARTEN TRANSPORT LTD (MRTN)

Reporting relationship: EVP & Chief Operating Officer
Issuer ticker: MRTN
Reported as of: 05 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 07 May 2026, 16:36:23 UTC
Prior SEC filing: 23 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ James J. Hinnendael, attorney-in-fact

Key filing fact

Adam Daniel Phillips filed Form 4 for MARTEN TRANSPORT LTD (MRTN) on 07 May 2026.

Key facts

This page summarizes Adam Daniel Phillips's Form 4 filing for MARTEN TRANSPORT LTD (MRTN).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 07 May 2026, 16:36.

Change

Previous filing in this sequence was filed on 23 Feb 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002005041 Primary reporting owner

Phillips Adam Daniel

Relationship: EVP & Chief Operating Officer
Address: C/O MARTEN TRANSPORT, LTD., 129 MARTEN STREET, MONDOVI
Signature: /s/ James J. Hinnendael, attorney-in-fact
Signature date: 07 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MRTN transaction

Common Stock

Award

Transaction value
Shares: +4,661
Change %: +44%
Price: $0.000000^*
Shares after: 15,284
Date: 05 May 2026
Ownership: Direct
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

These shares granted under a Performance Unit Award Agreement will vest in equal increments over five years beginning on December 31, 2026.

Footnote F2

Includes: (i) 4,661 shares granted under a Performance Award Agreement that vest on 12/31/2026 through 12/31/2030; (ii) 4,098 shares granted under a Performance Award Agreement that vest on 12/31/2026 through 12/31/2029; (iii) 2,314 shares granted under a Performance Award Agreement that vest on 12/31/2026 through 12/31/2028; (iv) 600 shares granted under a Performance Award Agreement that vest on 12/31/2026 through 12/31/2027; and (v) 300 shares granted under a Performance Award Agreement that vest on 12/31/2026.