MARTEN TRANS LTD MRTN
COM · Common Stock · CUSIP 573075108
American trucking company
- SectorIndustrials
- IndustryTrucking (No Local)
- HeadquartersMondovi, WI
- Websitemarten.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($2.1m this quarter). Holder counts are more reliable. Shares outstanding: 81.7m as of 2026-07-28, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $17.35. Options: 6 managers hold calls ($5.2m notional), 0 hold puts (—).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 204 |
| Q4 2022 | 210 |
| Q1 2023 | 205 |
| Q2 2023 | 196 |
| Q3 2023 | 194 |
| Q4 2023 | 190 |
| Q1 2024 | 202 |
| Q2 2024 | 191 |
| Q3 2024 | 200 |
| Q4 2024 | 196 |
| Q1 2025 | 194 |
| Q2 2025 | 215 |
| Q3 2025 | 216 |
| Q4 2025 | 205 |
| Q1 2026 | 225 |
| Q2 2026 | 229 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 86 | 96 |
| Q4 2024 | 97 | 89 |
| Q1 2025 | 98 | 86 |
| Q2 2025 | 116 | 91 |
| Q3 2025 | 128 | 101 |
| Q4 2025 | 106 | 115 |
| Q1 2026 | 120 | 84 |
| Q2 2026 | 116 | 105 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $134.3k | $180.8k | 1.35 |
| Q4 2025 | $0 | $5.7k | — |
| Q1 2026 | $4.0m | $74.8k | 0.02 |
| Q2 2026 | $5.2m | $0 | 0.00 |
Biggest buyers
| CRAMER ROSENTHAL MCGLYNN LLC | New | +1.5m |
| GOLDMAN SACHS GROUP INC | Added | +1.5m |
| Nuveen, LLC | Added | +1.3m |
| FMR LLC | Added | +933.2k |
| BESSEMER GROUP INC | Added | +873.3k |
| 12th Street Asset Management Company, LLC | New | +758.6k |
| ROYCE & ASSOCIATES LP | Added | +414.7k |
| TWO SIGMA INVESTMENTS, LP | Added | +401.1k |
| MACKENZIE FINANCIAL CORP | New | +313.1k |
| BlackRock, Inc. | Added | +298.9k |
Biggest sellers
| NUANCE INVESTMENTS, LLC | Reduced | -4.3m |
| Boston Partners | Reduced | -650.7k |
| 4D Advisors, LLC | Sold out | -350.0k |
| FIRST TRUST ADVISORS LP | Reduced | -294.2k |
| ALLIANCEBERNSTEIN L.P. | Reduced | -293.2k |
| TEACHER RETIREMENT SYSTEM OF TEXAS | Reduced | -183.8k |
| Mariner, LLC | Reduced | -178.6k |
| Russell Investments Group, Ltd. | Reduced | -174.9k |
| JPMORGAN CHASE & CO | Reduced | -164.8k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Sold out | -159.6k |
Biggest calls
| JANE STREET GROUP, LLC | Added | $1.4m78.2k shares |
| CITADEL ADVISORS LLC | Reduced | $1.2m70.5k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $1.1m62.0k shares |
| SIMPLEX TRADING, LLC | Added | $765.1k44.1k shares |
| CastleKnight Management LP | New | $520.5k30.0k shares |
| IMC-Chicago, LLC | Reduced | $227.3k13.1k shares |
Biggest puts
| None |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| DIMENSIONAL FUND ADVISORS LP 13G · institution filed 2026-01-21 | 6.0% |
Fell to 5% or below in the last year: NUANCE INVESTMENTS, LLC (4.9%, 2026-07-06), VANGUARD GROUP INC (4.9%, 2026-01-30)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 1 | $158.1k | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 1 | $257.6k | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.00% of their portfolio | 10.1m $174.5m | Added +298.9k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 5.0m $86.7m | Added +105.7k |
| AMERICAN CENTURY COMPANIES INC 0.02% of their portfolio | 2.8m $48.6m | Added +180.9k |
| STATE STREET CORP 0.00% of their portfolio | 2.7m $47.3m | Added +126.1k |
| FMR LLC 0.00% of their portfolio | 2.7m $46.9m | Added +933.2k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 2.5m $43.8m | Added +28.2k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 2.1m $36.5m | Added +1.5m |
| Nuveen, LLC 0.01% of their portfolio | 1.9m $33.7m | Added +1.3m |
| TWO SIGMA INVESTMENTS, LP 0.02% of their portfolio | 1.8m $31.8m | Added +401.1k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.6m $27.0m | Added +86.0k |
| CRAMER ROSENTHAL MCGLYNN LLC 1.34% of their portfolio | 1.5m $26.4m | New |
| ROYCE & ASSOCIATES LP 0.19% of their portfolio | 1.4m $24.2m | Added +414.7k |
| MORGAN STANLEY 0.00% of their portfolio | 1.4m $23.5m | Added +58.9k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 1.2m $21.1m | Added +105.2k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 1.2m $20.8m | Reduced -76.3k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 1.1m $18.8m | Added +111.6k |
| Boston Partners 0.02% of their portfolio | 1.0m $18.2m | Reduced -650.7k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 922.4k $16.0m | Reduced -174.9k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio | 919.7k $16.0m | Added +243.2k |
| BESSEMER GROUP INC 0.02% of their portfolio | 873.5k $15.2m | Added +873.3k |
| LONDON CO OF VIRGINIA 0.08% of their portfolio | 854.0k $14.8m | Reduced -35.3k |
| 12th Street Asset Management Company, LLC 1.88% of their portfolio | 758.6k $13.2m | New |
| DEPRINCE RACE & ZOLLO INC 0.22% of their portfolio | 742.4k $12.9m | Reduced -25.3k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 722.3k $12.5m | Added +52.9k |
| NEXT CENTURY GROWTH INVESTORS LLC 0.64% of their portfolio | 699.3k $12.1m | Added +280.9k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 667.7k $11.6m | Added +41.4k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 604.4k $10.6m | Reduced -164.8k |
| NUANCE INVESTMENTS, LLC 1.61% of their portfolio | 546.9k $9.5m | Reduced -4.3m |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 486.0k $8.4m | Reduced -71.1k |
| Creative Planning 0.00% of their portfolio | 419.4k $7.3m | Added +20.9k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 395.1k $6.9m | Added +49.3k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 384.6k $6.7m | Added +4.6k |
| NORGES BANK 0.00% of their portfolio | 379.0k $6.6m | Not comparable |
| TEACHER RETIREMENT SYSTEM OF TEXAS 0.02% of their portfolio | 363.0k $6.3m | Reduced -183.8k |
| HEARTLAND ADVISORS INC 0.27% of their portfolio | 350.0k $6.1m | Unchanged |
| Bank of New York Mellon Corp 0.00% of their portfolio | 329.7k $5.7m | Added +8.0k |
| Invesco Ltd. 0.00% of their portfolio | 323.2k $5.6m | Reduced -37.0k |
| NICHOLAS COMPANY, INC. 0.10% of their portfolio | 315.1k $5.5m | Reduced -81.9k |
| MACKENZIE FINANCIAL CORP 0.01% of their portfolio | 313.1k $5.4m | New |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 280.0k $4.9m | Reduced -1.4k |
| Stanley-Laman Group, Ltd. 0.48% of their portfolio | 270.4k $4.7m | Reduced -2.0k |
| Buckland Partners Management Co LLC 2.27% of their portfolio | 267.6k $4.6m | Unchanged |
| Polar Asset Management Partners Inc. 0.08% of their portfolio | 255.8k $4.4m | New |
| UBS Group AG 0.00% of their portfolio | 250.9k $4.4m | Added +130.2k |
| Allianz Asset Management GmbH 0.00% of their portfolio | 241.3k $4.2m | Added +22.2k |
| Aptus Capital Advisors, LLC 0.03% of their portfolio | 204.3k $3.5m | New |
| US BANCORP \DE\ 0.00% of their portfolio | 200.5k $3.5m | Reduced -68.2k |
| Public Sector Pension Investment Board 0.01% of their portfolio | 198.6k $3.4m | Reduced -8.5k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 146.9k $2.5m | Reduced -17.7k |
| Legal & General Group Plc 0.00% of their portfolio | 132.9k $2.3m | Reduced -2.9k |
| Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio | 125.5k $2.2m | Added +92.4k |
| Verition Fund Management LLC 0.02% of their portfolio | 123.9k $2.2m | Reduced -32.5k |
| Campbell & CO Investment Adviser LLC 0.11% of their portfolio | 121.0k $2.1m | Added +105.3k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 120.6k $2.1m | Reduced -99.8k |
| Swiss National Bank 0.00% of their portfolio | 114.5k $2.0m | Reduced -6.1k |
| CastleKnight Management LP 0.07% of their portfolio | 108.4k $1.9m | Unchanged |
| Mariner, LLC 0.00% of their portfolio | 107.4k $1.9m | Reduced -178.6k |
| Hudson Bay Capital Management LP 0.01% of their portfolio | 106.8k $1.9m | Reduced -96.3k |
| WINTON GROUP Ltd 0.05% of their portfolio | 92.4k $1.6m | Reduced -19.6k |
| Fulcrum Asset Management LLP 0.15% of their portfolio | 85.5k $1.5m | New |
| CITIGROUP INC 0.00% of their portfolio | 79.9k $1.4m | Added +25.0k |
| Atria Investments, Inc 0.01% of their portfolio | 77.0k $1.3m | New |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 76.9k $1.3m | Reduced -6.0k |
| CONFLUENCE INVESTMENT MANAGEMENT LLC 0.02% of their portfolio | 75.3k $1.3m | Reduced -5.4k |
| Quantinno Capital Management LP 0.00% of their portfolio | 75.2k $1.3m | Added +13.7k |
| XTX Topco Ltd 0.02% of their portfolio | 73.8k $1.3m | Added +44.2k |
| BARCLAYS PLC 0.00% of their portfolio | 72.5k $1.3m | Reduced -8.2k |
| Treasurer of the State of North Carolina 0.00% of their portfolio | 70.8k $1.2m | New |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 66.9k $1.2m | Added +4.1k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 64.8k $850.6k | Reduced -293.2k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 62.9k $1.1m | Added +6.5k |
| MARTINGALE ASSET MANAGEMENT L P 0.03% of their portfolio | 61.9k $1.1m | Reduced -1.9k |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 60.7k $1.1m | Added +730 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 59.0k $1.0m | Added +3.2k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 56.4k $979.4k | Added +24.7k |
| Ausbil Investment Management Ltd 0.45% of their portfolio | 56.4k $984.8k | Reduced -15.9k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 55.4k $961.6k | New |
| EntryPoint Capital, LLC 0.23% of their portfolio | 54.3k $942.6k | Added +15.3k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.00% of their portfolio | 53.7k $932.0k | Reduced -38.4k |
| SG Americas Securities, LLC 0.00% of their portfolio | 51.2k $889.0k | Reduced -29.4k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 51.1k $886.4k | Added +28.5k |
| PDT Partners, LLC 0.04% of their portfolio | 47.1k $816.5k | Unchanged |
| Horizon Investments, LLC 0.01% of their portfolio | 46.5k $806.0k | New |
| CANADA LIFE ASSURANCE Co 0.00% of their portfolio | 45.5k $790.0k | Reduced -4.1k |
| VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio | 44.5k $771.5k | Unchanged |
| MERCER GLOBAL ADVISORS INC /ADV 0.00% of their portfolio | 44.2k $766.0k | Added +16.4k |
| GSA CAPITAL PARTNERS LLP 0.05% of their portfolio | 43.8k $760.0k | New |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 43.7k $760.7k | Reduced -35.4k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 43.4k $753.7k | Added +8.5k |
| Vanguard Personalized Indexing Management, LLC 0.01% of their portfolio | 40.5k $702.3k | Reduced -2.0k |
| Inspire Investing, LLC 0.03% of their portfolio | 39.0k $677.3k | Reduced -461 |
| Thrivent Financial for Lutherans 0.00% of their portfolio | 38.0k $660.0k | Reduced -605 |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 35.8k $620.4k | Added +10.7k |
| MetLife Investment Management, LLC 0.00% of their portfolio | 35.0k $607.1k | Added +6.2k |
| Simplicity Wealth,LLC 0.02% of their portfolio | 32.7k $566.6k | New |
| Illinois Municipal Retirement Fund 0.01% of their portfolio | 30.1k $522.8k | Reduced -3.5k |
| DARK FOREST CAPITAL MANAGEMENT LP 0.03% of their portfolio | 29.3k $508.4k | Added +3.8k |
| Jupiter Topco LLC 0.00% of their portfolio | 28.1k $488.5k | First filing |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 27.3k $474.1k | Reduced -29 |
| Cetera Investment Advisers 0.00% of their portfolio | 27.3k $473.5k | Added +2.1k |