MRTN Institutional Ownership & Shareholders
MARTEN TRANSPORT LTD (MRTN) is currently held by 228 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $949.81M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of MRTN tracked by InsiderSet, reporting ownership valued at approximately $174.52M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $118.09M, representing an estimated loss of -32.33% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 56% of the total disclosed MRTN value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Dimensional Fund Advisors Lp, American Century Companies Inc, and several other long-term asset managers with concentrated positions in MARTEN TRANSPORT LTD (MRTN).
This page ranks the largest institutional MRTN shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
228
Total Reported Value
$949.81M
Largest Holder
Blackrock, Inc.
Largest Position
$174.52M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
62
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 10,058,930 | $174,522,436 | $118,091,838 | -$56,430,598 | -32.33% | |
| Dimensional Fund Advisors Lp | 0.01% | 5,063,435 | $65,420,517 | $59,444,727 | -$5,975,790 | -9.13% | |
| American Century Companies Inc | 0.02% | 2,800,863 | $48,594,973 | $32,882,132 | -$15,712,841 | -32.33% | |
| State Street Corp | 0.00% | 2,723,602 | $47,254,495 | $31,975,087 | -$15,279,408 | -32.33% | |
| Vanguard Capital Management Llc | 0.00% | 2,524,859 | $43,806,304 | $29,641,845 | -$14,164,459 | -32.33% | |
| Goldman Sachs Group Inc | 0.00% | 2,101,794 | $36,466,135 | $24,675,062 | -$11,791,073 | -32.33% | |
| Nuveen, Llc | 0.01% | 1,945,243 | $33,749,951 | $22,837,153 | -$10,912,798 | -32.33% | |
| Two Sigma Investments, Lp | 0.02% | 1,830,565 | $31,760,303 | $21,490,833 | -$10,269,470 | -32.33% | |
| Cramer Rosenthal Mcglynn Llc | 1.34% | 1,523,757 | $26,437,184 | $17,888,907 | -$8,548,277 | -32.33% | |
| Royce & Associates Lp | 0.19% | 1,394,890 | $24,201,342 | $16,376,009 | -$7,825,333 | -32.33% | |
| Morgan Stanley | 0.00% | 1,353,069 | $23,475,803 | $15,885,030 | -$7,590,773 | -32.33% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,218,980 | $21,149,303 | $14,310,825 | -$6,838,478 | -32.33% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,198,050 | $20,786,168 | $14,065,107 | -$6,721,061 | -32.33% | |
| Geode Capital Management, Llc | 0.00% | 1,584,847 | $20,480,080 | $18,606,104 | -$1,873,976 | -9.15% | |
| Ameriprise Financial Inc | 0.00% | 1,081,606 | $18,765,866 | $12,698,054 | -$6,067,812 | -32.33% | |
| Boston Partners | 0.02% | 1,049,147 | $18,203,041 | $12,316,986 | -$5,886,055 | -32.34% | |
| Arrowstreet Capital, Limited Partnership | 0.01% | 919,740 | $15,957,489 | $10,797,748 | -$5,159,741 | -32.33% | |
| Bessemer Group Inc | 0.02% | 873,519 | $15,153,000 | $10,255,113 | -$4,897,887 | -32.32% | |
| London Co Of Virginia | 0.08% | 853,969 | $14,816,386 | $10,025,596 | -$4,790,790 | -32.33% | |
| 12Th Street Asset Management Company, Llc | 1.88% | 758,634 | $13,162,300 | $8,906,363 | -$4,255,937 | -32.33% | |
| Citadel Advisors Llc | 0.01% | 722,251 | $12,531,055 | $8,479,227 | -$4,051,828 | -32.33% | |
| Next Century Growth Investors Llc | 0.64% | 699,305 | $12,132,941 | $8,209,841 | -$3,923,100 | -32.33% | |
| Northern Trust Corp | 0.00% | 667,681 | $11,584,266 | $7,838,575 | -$3,745,691 | -32.33% | |
| Nuance Investments, Llc | 2.10% | 882,942 | $11,407,612 | $10,365,739 | -$1,041,873 | -9.13% | |
| Russell Investments Group, Ltd. | 0.01% | 828,731 | $10,707,199 | $9,729,302 | -$977,897 | -9.13% | |
| Jpmorgan Chase & Co | 0.00% | 604,366 | $10,606,623 | $7,095,257 | -$3,511,366 | -33.11% | |
| Deprince Race & Zollo Inc | 0.18% | 794,530 | $10,265,328 | $9,327,782 | -$937,546 | -9.13% | |
| Bank Of America Corp | 0.00% | 486,041 | $8,432,812 | $5,706,121 | -$2,726,691 | -32.33% | |
| Aqr Capital Management Llc | 0.00% | 395,125 | $6,855,412 | $4,638,768 | -$2,216,645 | -32.33% | |
| Fmr Llc | 0.00% | 495,058 | $6,792,196 | $5,811,981 | -$980,215 | -14.43% | |
| Vanguard Fiduciary Trust Co | 0.00% | 384,638 | $6,673,469 | $4,515,650 | -$2,157,819 | -32.33% | |
| Norges Bank | 0.00% | 379,000 | $6,575,650 | $4,449,460 | -$2,126,190 | -32.33% | |
| Teacher Retirement System Of Texas | 0.02% | 363,027 | $6,298,519 | $4,261,937 | -$2,036,582 | -32.33% | |
| Creative Planning | 0.00% | 476,367 | $6,154,661 | $5,592,549 | -$562,112 | -9.13% | |
| Heartland Advisors Inc | 0.27% | 350,000 | $6,072,500 | $4,109,000 | -$1,963,500 | -32.33% | |
| Invesco Ltd. | 0.00% | 323,199 | $5,607,503 | $3,794,356 | -$1,813,147 | -32.33% | |
| Stanley-Laman Group, Ltd. | 0.55% | 390,996 | $5,051,666 | $4,590,293 | -$461,373 | -9.13% | |
| Buckland Partners Management Co Llc | 2.27% | 267,594 | $4,642,756 | $3,141,554 | -$1,501,202 | -32.33% | |
| Polar Asset Management Partners Inc. | 0.08% | 255,800 | $4,438,130 | $3,003,092 | -$1,435,038 | -32.33% | |
| Ubs Group Ag | 0.00% | 250,880 | $4,352,768 | $2,945,331 | -$1,407,437 | -32.33% | |
| Bank Of New York Mellon Corp | 0.00% | 327,908 | $4,236,568 | $3,849,640 | -$386,928 | -9.13% | |
| Allianz Asset Management Gmbh | 0.00% | 241,291 | $4,186,399 | $2,832,756 | -$1,353,643 | -32.33% | |
| Nicholas Company, Inc. | 0.07% | 315,135 | $4,071,544 | $3,699,685 | -$371,859 | -9.13% | |
| Principal Financial Group Inc | 0.00% | 277,152 | $3,580,804 | $3,253,764 | -$327,040 | -9.13% | |
| Aptus Capital Advisors, Llc | 0.03% | 204,337 | $3,545,247 | $2,398,916 | -$1,146,331 | -32.33% | |
| Public Sector Pension Investment Board | 0.01% | 198,609 | $3,445,866 | $2,331,670 | -$1,114,196 | -32.33% | |
| Us Bancorp \De\ | 0.00% | 200,361 | $2,588,664 | $2,352,238 | -$236,426 | -9.13% | |
| Rhumbline Advisers | 0.00% | 146,904 | $2,548,802 | $1,724,653 | -$824,149 | -32.33% | |
| Legal & General Group Plc | 0.00% | 132,866 | $2,305,224 | $1,559,847 | -$745,377 | -32.33% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 125,451 | $2,176,575 | $1,472,795 | -$703,780 | -32.33% |
Frequently asked questions about MRTN
Who are the largest institutional holders of MRTN?
The largest institutional holders of MRTN reported in the latest SEC Form 13F filings include Blackrock, Inc., Dimensional Fund Advisors Lp, American Century Companies Inc, State Street Corp, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported MRTN position.
What is MRTN institutional ownership?
This page tracks MRTN positions reported by institutional investment managers through SEC Form 13F. MARTEN TRANSPORT LTD (MRTN) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own MRTN?
InsiderSet currently tracks 228 institutional managers reporting MRTN holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of MRTN shareholders.
How much MRTN stock do institutions own?
Institutional investment managers disclosed approximately $949.81M in MRTN holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was MRTN institutional ownership last updated?
The latest MRTN institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional MRTN holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its MRTN position after the reporting date.
Are institutions buying or selling MRTN?
Institutional buying and selling can be analyzed by comparing MRTN positions across consecutive 13F reporting periods. InsiderSet's MRTN Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View MRTN ownership changes.
How has MRTN institutional ownership changed over time?
InsiderSet tracks MRTN institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.