MRTN Marten Transport Ltd.
Marten Transport Ltd. (MRTN) Institutional Ownership
What the institutions did with MRTN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 10.1M | 16.4% |
| DIMENSIONAL FUND ADVISORS LP | 5.0M | 8.2% |
| AMERICAN CENTURY COMPANIES INC | 2.8M | 4.6% |
| STATE STREET CORP | 2.7M | 4.5% |
| FMR LLC | 2.7M | 4.4% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.5M | 4.1% |
| GOLDMAN SACHS GROUP INC | 2.1M | 3.4% |
| Nuveen, LLC | 1.9M | 3.2% |
| TWO SIGMA INVESTMENTS, LP | 1.8M | 3.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.6M | 2.5% |
| CRAMER ROSENTHAL MCGLYNN LLC | 1.5M | 2.5% |
| ROYCE & ASSOCIATES LP | 1.4M | 2.3% |
| MORGAN STANLEY | 1.4M | 2.2% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.2M | 2.0% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.2M | 2.0% |
| AMERIPRISE FINANCIAL INC | 1.1M | 1.8% |
| Boston Partners | 1.0M | 1.7% |
| Russell Investments Group, Ltd. | 922.4K | 1.5% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 919.7K | 1.5% |
| BESSEMER GROUP INC | 873.5K | 1.4% |
| LONDON CO OF VIRGINIA | 854.0K | 1.4% |
| 12th Street Asset Management Company, LLC | 758.6K | 1.2% |
| DEPRINCE RACE & ZOLLO INC | 742.4K | 1.2% |
| CITADEL ADVISORS LLC | 722.3K | 1.2% |
| NEXT CENTURY GROWTH INVESTORS LLC | 699.3K | 1.1% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| NUANCE INVESTMENTS, LLC | Reduced | 4.8M | 546.9K | -4.3M |
| CRAMER ROSENTHAL MCGLYNN LLC | New | 0 | 1.5M | +1.5M |
| GOLDMAN SACHS GROUP INC | Increased | 620.1K | 2.1M | +1.5M |
| Nuveen, LLC | Increased | 651.5K | 1.9M | +1.3M |
| FMR LLC | Increased | 1.8M | 2.7M | +933.2K |
| BESSEMER GROUP INC | Increased | 172 | 873.5K | +873.3K |
| 12th Street Asset Management Company, LLC | New | 0 | 758.6K | +758.6K |
| Boston Partners | Reduced | 1.7M | 1.0M | -650.7K |
| ROYCE & ASSOCIATES LP | Increased | 980.2K | 1.4M | +414.7K |
| TWO SIGMA INVESTMENTS, LP | Increased | 1.4M | 1.8M | +401.1K |
| 4D Advisors, LLC | Sold Out | 350.0K | 0 | -350.0K |
| MACKENZIE FINANCIAL CORP | New | 0 | 313.1K | +313.1K |
| BlackRock, Inc. | Increased | 9.8M | 10.1M | +298.9K |
| FIRST TRUST ADVISORS LP | Reduced | 304.2K | 10.0K | -294.2K |
| ALLIANCEBERNSTEIN L.P. | Reduced | 358.0K | 64.8K | -293.2K |
| NEXT CENTURY GROWTH INVESTORS LLC | Increased | 418.4K | 699.3K | +280.9K |
| Polar Asset Management Partners Inc. | New | 0 | 255.8K | +255.8K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 676.6K | 919.7K | +243.2K |
| Aptus Capital Advisors, LLC | New | 0 | 204.3K | +204.3K |
| TEACHER RETIREMENT SYSTEM OF TEXAS | Reduced | 546.8K | 363.0K | -183.8K |
| AMERICAN CENTURY COMPANIES INC | Increased | 2.6M | 2.8M | +180.9K |
| Mariner, LLC | Reduced | 286.0K | 107.4K | -178.6K |
| Russell Investments Group, Ltd. | Reduced | 1.1M | 922.4K | -174.9K |
| JPMORGAN CHASE & CO | Reduced | 769.2K | 604.4K | -164.8K |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Sold Out | 159.6K | 0 | -159.6K |
| HRT FINANCIAL LP | Sold Out | 142.9K | 0 | -142.9K |
| UBS Group AG | Increased | 120.7K | 250.9K | +130.2K |
| STATE STREET CORP | Increased | 2.6M | 2.7M | +126.1K |
| AMERIPRISE FINANCIAL INC | Increased | 970.0K | 1.1M | +111.6K |
| RAYMOND JAMES FINANCIAL INC | Reduced | 128.6K | 20.1K | -108.5K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 4.9M | 5.0M | +105.7K |
| Campbell & CO Investment Adviser LLC | Increased | 15.7K | 121.0K | +105.3K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 1.1M | 1.2M | +105.2K |
| SEI INVESTMENTS CO | Reduced | 220.3K | 120.6K | -99.8K |
| Hudson Bay Capital Management LP | Reduced | 203.1K | 106.8K | -96.3K |
| Connor, Clark & Lunn Investment Management Ltd. | Increased | 33.0K | 125.5K | +92.4K |
| Numerai GP LLC | Sold Out | 88.5K | 0 | -88.5K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.5M | 1.6M | +86.0K |
| Fulcrum Asset Management LLP | New | 0 | 85.5K | +85.5K |
| NICHOLAS COMPANY, INC. | Reduced | 397.0K | 315.1K | -81.9K |
| Atria Investments, Inc | New | 0 | 77.0K | +77.0K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Reduced | 1.3M | 1.2M | -76.3K |
| BANK OF AMERICA CORP /DE/ | Reduced | 557.1K | 486.0K | -71.1K |
| Treasurer of the State of North Carolina | New | 0 | 70.8K | +70.8K |
| US BANCORP \DE\ | Reduced | 268.8K | 200.5K | -68.2K |
| Trexquant Investment LP | Reduced | 74.5K | 10.7K | -63.8K |
| Canvas Wealth Advisors, LLC | Reduced | 73.6K | 12.7K | -60.9K |
| JANE STREET GROUP, LLC | Sold Out | 60.6K | 0 | -60.6K |
| MORGAN STANLEY | Increased | 1.3M | 1.4M | +58.9K |
| MILLENNIUM MANAGEMENT LLC | New | 0 | 55.4K | +55.4K |
| CITADEL ADVISORS LLC | Increased | 669.3K | 722.3K | +52.9K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 345.8K | 395.1K | +49.3K |
| Horizon Investments, LLC | New | 0 | 46.5K | +46.5K |
| Harber Asset Management LLC | Sold Out | 45.3K | 0 | -45.3K |
| Squarepoint Ops LLC | Sold Out | 44.5K | 0 | -44.5K |
| XTX Topco Ltd | Increased | 29.6K | 73.8K | +44.2K |
| GSA CAPITAL PARTNERS LLP | New | 0 | 43.8K | +43.8K |
| Voleon Capital Management LP | Sold Out | 41.7K | 0 | -41.7K |
| NORTHERN TRUST CORP | Increased | 626.3K | 667.7K | +41.4K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Reduced | 92.2K | 53.7K | -38.4K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.