Marten Transport Ltd
MRTN- Exchange
- Nasdaq
- Industry
- Trucking (No Local)
- SEC CIK
- 0000799167
No open-market purchases or sales by Marten Transport Ltd insiders were filed in the last 90 days; 230 institutions reported holding it in 13F filings for Q2 2026, worth $1.06B in total; no superinvestor holds it.
Holders of 5% or more of MRTN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Marten Transport Ltd, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Dimensional Fund Advisors LP | 13G/A | 6.00%4.86M shares | – | Feb 12, 20213 filings | Jan 21, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
12 Schedule 13D and 13G filings on Marten Transport Ltd, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Jul 6, 20261:22 PM ET | Nuance Investments, LLC | 13G/A | 4.90%0 shares | −2.79 ppfrom 7.69%Below 5% | Apr 10, 2026 | SEC |
| Jan 30, 20262:19 PM ET | Vanguard Group Inc | 13G/A | 4.92%4.01M shares | –Below 5% | Dec 31, 2025 | SEC |
| Jan 22, 20261:17 PM ET | Nuance Investments, LLC | 13G/A | 7.69%0 shares | +1.26 ppfrom 6.43% | Dec 31, 2025 | SEC |
| Jan 21, 20261:21 PM ET | Dimensional Fund Advisors LP | 13G/A | 6.00%4.86M shares | – | Dec 31, 2025 | SEC |
| Aug 8, 20251:05 PM ET | Victory Capital Management Inc | 13G/A | 3.91%3.18M shares | −1.09 ppfrom 5.00%Below 5% | Jun 30, 2025 | SEC |
| May 12, 20254:22 PM ET | Nuance Investments, LLC | 13G | 6.43%5.24M shares | New | Mar 31, 2025 | SEC |
| Jan 28, 20259:28 AM ET | Victory Capital Management Inc | 13G | 5.00%4.07M shares | – | Dec 31, 2024 | SEC |
| Feb 8, 2022 | Dimensional Fund Advisors LP | 13G/AOld format | – | – | – | SEC |
| Feb 2, 2022 | Victory Capital Management Inc | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2021 | Dimensional Fund Advisors LP | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2021 | Victory Capital Management Inc | 13GOld format | – | New | – | SEC |
| Jan 26, 20216:52 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Marten Transport Ltd shares.
No Form 144 notices for Marten Transport Ltd are on file.