Marten Transport, Ltd.
US ˙ NasdaqGS ˙ US5730751089

SecurityMRTN / Marten Transport, Ltd.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership626,320 shares
Latest Disclosed Value $ 8,223,582
Northern Trust Corp reports 3.81% increase in ownership of MRTN / Marten Transport, Ltd.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 626,320 shares of Marten Transport, Ltd. (US:MRTN) valued at $8,223,582 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 603,319 shares of Marten Transport, Ltd.. This represents a change in shares of 3.81% during the quarter. The current value of the position is $11,123,443 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F MARTEN TRANS COM 573075108 626,320 23,001 3.81 8,224 19.78 0.0002
2026-02-17 2025-12-31 13F MARTEN TRANS COM 573075108 603,319 -26,571 -4.22 6,866 2.25 0.0002
2025-11-14 2025-09-30 13F MARTEN TRANS COM 573075108 629,890 -21,501 -3.30 6,715 -20.65 0.0009
2025-08-13 2025-06-30 13F MARTEN TRANS COM 573075108 651,391 -17,489 -2.61 8,462 -7.80 0.0012
2025-05-13 2025-03-31 13F MARTEN TRANS COM 573075108 668,880 -264,896 -28.37 9,177 -37.04 0.0014
2025-02-14 2024-12-31 13F MARTEN TRANS COM 573075108 933,776 40,237 4.50 14,576 -7.83 0.0021
2024-11-13 2024-09-30 13F MARTEN TRANS COM 573075108 893,539 11,881 1.35 15,816 -2.77 0.0026
2024-08-14 2024-06-30 13F MARTEN TRANS COM 573075108 881,658 -51,384 -5.51 16,267 -5.66 0.0027
2024-05-14 2024-03-31 13F MARTEN TRANS COM 573075108 933,042 -24,044 -2.51 17,243 -14.13 0.0030
2024-02-13 2023-12-31 13F MARTEN TRANS COM 573075108 957,086 -15,051 -1.55 20,080 4.80 0.0036
2023-11-13 2023-09-30 13F MARTEN TRANS COM 573075108 972,137 -2,500 -0.26 19,161 -8.56 0.0037
2023-08-11 2023-06-30 13F MARTEN TRANS COM 573075108 974,637 -9,725 -0.99 20,955 1.61 0.0040
2023-05-15 2023-03-31 13F MARTEN TRANS COM 573075108 984,362 -18,842 -1.88 20,622 3.93 0.0041
2023-02-13 2022-12-31 13F MARTEN TRANS COM 573075108 1,003,204 53 0.01 19,843 3.24 0.0042
2022-11-14 2022-09-30 13F MARTEN TRANS COM 573075108 1,003,151 -93,346 -8.51 19,220 4.21 0.0044
2022-08-12 2022-06-30 13F MARTEN TRANS COM 573075108 1,096,497 -12,647 -1.14 18,443 -6.38 0.0040
2022-05-13 2022-03-31 13F MARTEN TRANS COM 573075108 1,109,144 108,373 10.83 19,700 14.72 0.0035
2022-02-08 2021-12-31 13F MARTEN TRANS COM 573075108 1,000,771 -628 -0.06 17,172 9.29 0.0028
2021-11-15 2021-09-30 13F MARTEN TRANS COM 573075108 1,001,399 -164 -0.02 15,712 -4.86 0.0028
2021-08-13 2021-06-30 13F MARTEN TRANS COM 573075108 1,001,563 -3,506 -0.35 16,515 -3.17 0.0029
2021-05-12 2021-03-31 13F MARTEN TRANS COM 573075108 1,005,069 297 0.03 17,056 -1.48 0.0032
2021-02-11 2020-12-31 13F MARTEN TRANS COM 573075108 1,004,772 -9,025 -0.89 17,312 4.64 0.0034
2020-11-16 2020-09-30 13F MARTEN TRANS COM 573075108 1,013,797 323,973 46.96 16,545 -4.67 0.0036
2020-08-14 2020-06-30 13F MARTEN TRANS COM 573075108 689,824 -64,007 -8.49 17,356 12.21 0.0041
2020-05-14 2020-03-31 13F MARTEN TRANS COM 573075108 753,831 -321,874 -29.92 15,468 -33.09 0.0044
2020-02-14 2019-12-31 13F MARTEN TRANS COM 573075108 1,075,705 20 0.00 23,117 3.41 0.0052
2019-11-13 2019-09-30 13F MARTEN TRANS COM 573075108 1,075,685 13,227 1.24 22,354 15.93 0.0054
2019-08-13 2019-06-30 13F MARTEN TRANS COM 573075108 1,062,458 26,712 2.58 19,283 4.41 0.0046
2019-05-13 2019-03-31 13F MARTEN TRANS COM 573075108 1,035,746 44,579 4.50 18,468 15.08 0.0046
2019-02-12 2018-12-31 13F MARTEN TRANS COM 573075108 991,167 5,893 0.60 16,048 -22.62 0.0045
2018-11-14 2018-09-30 13F MARTEN TRANS COM 573075108 985,274 -1,846 -0.19 20,740 -10.40 0.0051
2018-09-18 2018-06-30 13F/A-1 MARTEN TRANS COM 573075108 987,120 70,744 7.72 23,148 10.80 0.0059
2018-08-14 2018-06-30 13F MARTEN TRANS COM 573075108 990,665 74,289 23,231
2018-05-09 2018-03-31 13F MARTEN TRANS COM 573075108 916,376 13,778 1.53 20,892 14.03 0.0054
2018-02-14 2017-12-31 13F MARTEN TRANS COM 573075108 902,598 -8,639 -0.95 18,322 -2.15 0.0046
2017-11-13 2017-09-30 13F MARTEN TRANS COM 573075108 911,237 275,250 43.28 18,725 7.46 0.0049
2017-08-11 2017-06-30 13F MARTEN TRANS COM 573075108 635,987 139,743 28.16 17,425 49.75 0.0049
2017-05-12 2017-03-31 13F MARTEN TRANS COM 573075108 496,244 -4,212 -0.84 11,636 -0.21 0.0034
2017-02-13 2016-12-31 13F MARTEN TRANS COM 573075108 500,456 -184,364 -26.92 11,660 -18.92 0.0036
2016-11-09 2016-09-30 13F MARTEN TRANS COM 573075108 684,820 117,651 20.74 14,381 28.06 0.0045
2016-08-12 2016-06-30 13F MARTEN TRANS COM 573075108 567,169 -6,998 -1.22 11,230 7.56 0.0036
2016-08-19 2016-03-31 13F/A-1 MARTEN TRANS COM 573075108 574,167 18,873 3.40 10,441 6.24 0.0035
2016-05-13 2016-03-31 13F Marten Trans COMM 573075108 574,165 10,749
2016-02-12 2015-12-31 13F Marten Trans COMM 573075108 555,294 24,895 4.69 9,828 14.59 0.0033
2015-11-12 2015-09-30 13F Marten Trans COMM 573075108 530,399 530,399 0.00 8,577 0.0029
2015-08-13 2015-06-30 13F Marten Trans COMM 573075108 0 -450,813 -100.00 0 -100.00
2015-05-14 2015-03-31 13F Marten Trans COMM 573075108 450,813 91,564 25.49 10,459 33.18 0.0031
2015-02-12 2014-12-31 13F Marten Trans COM 573075108 359,249 -15,755 -4.20 7,853 17.58 0.0024
2014-11-13 2014-09-30 13F Marten Trans COMM 573075108 375,004 19,440 5.47 6,679 -15.96 0.0021
2014-08-14 2014-06-30 13F MARTEN TRANS com 573075108 355,564 -38,897 -9.86 7,947 -6.38 0.0025
2014-05-14 2014-03-31 13F MARTEN TRANS COMM 573075108 394,461 -791 -0.20 8,489 6.37 0.0027
2014-02-21 2013-12-31 13F/A-1 MARTEN TRANS COM 573075108 395,252 7,116 1.83 7,981 19.80 0.0026
2014-02-12 2013-12-31 13F MARTEN TRANS COM 573075108 395,252 7,981
2013-11-13 2013-09-30 13F MARTEN TRANS COM 573075108 388,136 21,269 5.80 6,662 15.88 0.0023
2013-08-09 2013-06-30 13F MARTEN TRANS COM 573075108 366,867 366,867 5,749 0.0021
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.