Comparable stake leader
DIMENSIONAL FUND ADVISORS LP
SEC ownership of MARTEN TRANSPORT LTD
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000799167.
Disclosed value leader
Randolph L. Marten
Comparable rows
50/50
Latest evidence
05 May 2026
- Public ticker
- MRTN on Nasdaq
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
DIMENSIONAL FUND ADVISORS LP
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
DIMENSIONAL FUND ADVISORS LP
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
05 May 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000799167
- Issuer location
- Mondovi, WI
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of MARTEN TRANSPORT LTD (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
DIMENSIONAL FUND ADVISORS LP
Disclosed value leader
Randolph L. Marten
Comparable rows
50/50
Latest evidence
05 May 2026
13F
13D/G
3/4/5
Lead comparable stake: 6%
13D/G row: DIMENSIONAL FUND ADVISORS LP
Showing 1-8 of 50 holder rows.
Quick read
DIMENSIONAL FUND ADVISORS LP leads the comparable SEC ownership view at 6%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens DIMENSIONAL FUND ADVISORS LP's linked filing trail.
Comparable ownership
Top 5
DIMENSIONAL FUND ADVISORS LP
6%
VANGUARD GROUP INC
4.9%
NUANCE INVESTMENTS, LLC
4.9%
VICTORY CAPITAL MANAGEMENT INC
3.9%
Randolph L. Marten
22%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| DIMENSIONAL FUND ADVISORS LP |
13F
13D/G
Company
|
6%
from 13D/G
|
$64,250,271
4,893,498 shares
|
— | 31 Mar 2026 |
| VANGUARD GROUP INC |
13D/G
The Vanguard Group
|
4.9%
|
$45,676,911
4,013,753 shares
|
$0 | 31 Dec 2025 |
| NUANCE INVESTMENTS, LLC |
13F
13D/G
Company
|
4.9%
from 13D/G
|
$63,160,816
4,810,420 shares
|
— | 31 Mar 2026 |
| VICTORY CAPITAL MANAGEMENT INC |
13D/G
13F
Company
|
3.9%
|
$43,631,952
3,184,814 shares
|
-$12,148,530 | 30 Jun 2025 |
| Randolph L. Marten |
3/4/5
Chairman of the Board and CEO, Director, 10%+ Owner
|
22%
|
$232,980,033
17,744,100 shares
|
— | 05 May 2026 |
| Timothy M. Kohl |
3/4/5
Chief Executive Officer
|
0.36%
|
$3,841,450
291,019 shares
|
— | 06 May 2025 |
| Larry B. Hagness |
3/4/5
Director
|
0.26%
|
$2,764,849
210,575 shares
|
— | 05 May 2026 |
| Jerry M. Bauer |
3/4/5
Director
|
0.23%
|
$2,429,627
185,044 shares
|
— | 05 May 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 21 Jul 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-14 of 14 reporting-owner rows connected to MARTEN TRANSPORT LTD. Open a relationship link for the CIK-to-CIK filing trail.
Rows
14
Largest Forms 3/4/5 holder
Randolph L. Marten
Net 12M change
$0
Latest report
05 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Randolph L. Marten | Chairman of the Board and CEO, Director, 10%+ Owner | $232,980,033 | Mixed | 05 May 2026 | ||
| Timothy M. Kohl | Chief Executive Officer | $3,841,450 | Mixed | 06 May 2025 | ||
| Larry B. Hagness | Director | $2,764,849 | Mixed | 05 May 2026 | ||
| Jerry M. Bauer | Director | $2,429,627 | Mixed | 05 May 2026 | ||
| James J. Hinnendael | EVP & Chief Financial Officer | $2,121,335 | Mixed | 05 May 2026 | ||
| John H. Turner | EVP Sales & Marketing | $1,677,436 | Mixed | 01 Mar 2022 | ||
| Thomas J. Winkel | Director | $1,144,509 | Mixed | 07 May 2024 | ||
| Robert L. Demorest | Director | $773,278 | Mixed | 05 May 2026 | ||
| Douglas Paul Petit | President | $532,881 | Mixed | 05 May 2026 | ||
| Ronald Richard Booth | Director | $424,742 | Mixed | 05 May 2026 | ||
| Kathleen P. Iverson | Director | $300,020 | Mixed | 05 May 2026 | ||
| Randall John Baier | Exec. VP & Chief Tech. Officer | $296,265 | Mixed | 05 May 2026 | ||
| Adam Daniel Phillips | EVP & Chief Operating Officer | $200,678 | Mixed | 05 May 2026 | ||
| Patricia L. Jones | Director | $198,263 | Mixed | 05 May 2026 |
Recent insider transactions for MARTEN TRANSPORT LTD
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Patricia L. Jones | MRTN | Common Stock | Award | 37.3% | 4,100 | 15,100 | 05 May 2026 | Direct | ||
| Larry B. Hagness | MRTN | Common Stock | Award | 1.99% | 4,100 | 210,575 | 05 May 2026 | Direct | ||
| Kathleen P. Iverson | MRTN | Common Stock | Award | 21.9% | 4,100 | 22,850 | 05 May 2026 | Direct | ||
| Ronald Richard Booth | MRTN | Common Stock | Award | 14.5% | 4,100 | 32,349 | 05 May 2026 | Direct | ||
| Jerry M. Bauer | MRTN | Common Stock | Award | 2.27% | 4,100 | 185,044 | 05 May 2026 | Direct | ||
| Robert L. Demorest | MRTN | Common Stock | Award | 7.48% | 4,100 | 58,894 | 05 May 2026 | Direct | ||
| James J. Hinnendael | MRTN | Common Stock | Award | 4.37% | 6,766 | 161,564 | 05 May 2026 | Direct | ||
| Randolph L. Marten | MRTN | Common Stock | Award | 0.07% | 12,300 | 17,744,100 | 05 May 2026 | Direct | ||
| Adam Daniel Phillips | MRTN | Common Stock | Award | 43.9% | 4,661 | 15,284 | 05 May 2026 | Direct | ||
| Douglas Paul Petit | MRTN | Common Stock | Award | 18.8% | 6,423 | 40,585 | 05 May 2026 | Direct | ||
| Randall John Baier | MRTN | Common Stock | Award | 27.1% | 4,817 | 22,564 | 05 May 2026 | Direct | ||
| Randolph L. Marten | MRTN | Common Stock | Tax liability | -0.03% | -4,657 | 17,731,800 | 20 Feb 2026 | Direct | ||
| James J. Hinnendael | MRTN | Common Stock | Tax liability | -1.83% | -2,885 | 154,798 | 20 Feb 2026 | Direct | ||
| Adam Daniel Phillips | MRTN | Common Stock | Tax liability | -9.62% | -1,131 | 10,623 | 20 Feb 2026 | Direct | ||
| Douglas Paul Petit | MRTN | Common Stock | Tax liability | -6.31% | -2,299 | 34,162 | 20 Feb 2026 | Direct | ||
| Randall John Baier | MRTN | Common Stock | Tax liability | -6.69% | -1,273 | 17,747 | 20 Feb 2026 | Direct | ||
| Robert L. Demorest | MRTN | Common Stock | Gift | -10.7% | -6,580 | 54,794 | 24 Dec 2025 | Direct | ||
| Randolph L. Marten | MRTN | Common Stock | Gift | -0.01% | -1,500 | 17,736,457 | 19 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.