Marten Transport, Ltd.
US ˙ NasdaqGS ˙ US5730751089

SecurityMRTN / Marten Transport, Ltd.
InstitutionD. E. Shaw & Co., Inc.
ManagerDE Shaw
Latest Disclosed Ownership32,322 shares
Latest Disclosed Value $ 424,388
D. E. Shaw & Co., Inc. reports 76.32% decrease in ownership of MRTN / Marten Transport, Ltd.

On May 15, 2026 - D. E. Shaw & Co., Inc. filed a 13F-HR form disclosing ownership of 32,322 shares of Marten Transport, Ltd. (US:MRTN) valued at $424,388 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 136,501 shares of Marten Transport, Ltd.. This represents a change in shares of -76.32% during the quarter. The current value of the position is $566,281 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)
2026-05-15 2026-03-31 13F MARTEN TRANS COM 573075108 32,322 -104,179 -76.32 424 -72.70 0.0003
2026-02-17 2025-12-31 13F MARTEN TRANS COM 573075108 136,501 -99,955 -42.27 1,553 -38.37 0.0009
2025-11-14 2025-09-30 13F MARTEN TRANS COM 573075108 236,456 34,592 17.14 2,521 -3.89 0.0014
2025-08-14 2025-06-30 13F MARTEN TRANS COM 573075108 201,864 -195,600 -49.21 2,622 -51.92 0.0019
2025-05-15 2025-03-31 13F MARTEN TRANS COM 573075108 397,464 140,905 54.92 5,453 36.19 0.0049
2025-02-14 2024-12-31 13F MARTEN TRANS COM 573075108 256,559 61,938 31.82 4,005 16.26 0.0029
2024-11-14 2024-09-30 13F MARTEN TRANS COM 573075108 194,621 -68,896 -26.14 3,445 -29.15 0.0030
2024-08-14 2024-06-30 13F MARTEN TRANS COM 573075108 263,517 163,071 162.35 4,862 161.91 0.0045
2024-05-15 2024-03-31 13F MARTEN TRANS COM 573075108 100,446 43,742 77.14 1,856 56.10 0.0016
2024-02-14 2023-12-31 13F MARTEN TRANS COM 573075108 56,704 -80,157 -58.57 1,190 -55.91 0.0010
2023-11-14 2023-09-30 13F MARTEN TRANS COM 573075108 136,861 18,892 16.01 2,698 6.35 0.0028
2023-08-14 2023-06-30 13F MARTEN TRANS COM 573075108 117,969 22,362 23.39 2,536 26.67 0.0026
2023-05-15 2023-03-31 13F MARTEN TRANS COM 573075108 95,607 95,607 2,003 0.0021
2022-08-15 2022-06-30 13F MARTEN TRANS COM 573075108 0 -14,091 -100.00 0 -100.00
2022-05-16 2022-03-31 13F MARTEN TRANS COM 573075108 14,091 -46,864 -76.88 250 -76.10 0.0002
2022-02-14 2021-12-31 13F MARTEN TRANS COM 573075108 60,955 37,489 159.76 1,046 184.24 0.0009
2021-11-15 2021-09-30 13F MARTEN TRANS COM 573075108 23,466 -38,804 -62.32 368 -64.17 0.0003
2021-08-16 2021-06-30 13F MARTEN TRANS COM 573075108 62,270 -33,779 -35.17 1,027 -36.99 0.0009
2021-05-17 2021-03-31 13F MARTEN TRANS COM 573075108 96,049 84,045 700.14 1,630 687.44 0.0016
2021-02-16 2020-12-31 13F MARTEN TRANS COM 573075108 12,004 12,004 207 0.0002
2019-11-14 2019-09-30 13F MARTEN TRANS COM 573075108 0 -45,187 -100.00 0 -100.00
2019-08-14 2019-06-30 13F MARTEN TRANS COM 573075108 45,187 -7,639 -14.46 820 -12.95 0.0010
2019-05-15 2019-03-31 13F MARTEN TRANS COM 573075108 52,826 -67,170 -55.98 942 -51.52 0.0012
2019-02-14 2018-12-31 13F MARTEN TRANS COM 573075108 119,996 41,230 52.34 1,943 17.19 0.0027
2018-11-14 2018-09-30 13F MARTEN TRANS COM 573075108 78,766 53,868 216.35 1,658 183.90 0.0020
2018-08-14 2018-06-30 13F MARTEN TRANS COM 573075108 24,898 -54,150 -68.50 584 -67.59 0.0008
2018-05-15 2018-03-31 13F MARTEN TRANS COM 573075108 79,048 -42,619 -35.03 1,802 -27.04 0.0025
2018-02-14 2017-12-31 13F MARTEN TRANS COM 573075108 121,667 20,202 19.91 2,470 18.47 0.0034
2017-11-14 2017-09-30 13F MARTEN TRANS COM 573075108 101,465 38,256 60.52 2,085 20.38 0.0032
2017-08-14 2017-06-30 13F MARTEN TRANS COM 573075108 63,209 14,740 30.41 1,732 52.33 0.0029
2017-05-15 2017-03-31 13F MARTEN TRANS COM 573075108 48,469 -16,336 -25.21 1,137 -24.70 0.0020
2017-02-14 2016-12-31 13F MARTEN TRANS COM 573075108 64,805 31,960 97.31 1,510 118.84 0.0026
2016-11-14 2016-09-30 13F MARTEN TRANS COM 573075108 32,845 -22,987 -41.17 690 -37.56 0.0012
2016-08-15 2016-06-30 13F MARTEN TRANS COM 573075108 55,832 -7,243 -11.48 1,105 -6.44 0.0020
2016-05-16 2016-03-31 13F MARTEN TRANS COM 573075108 63,075 52,667 506.02 1,181 541.85 0.0021
2016-02-16 2015-12-31 13F MARTEN TRANS COM 573075108 10,408 -1,671 -13.83 184 -5.64 0.0003
2015-11-16 2015-09-30 13F MARTEN TRANS COM 573075108 12,079 -63,376 -83.99 195 -88.09 0.0003
2015-08-14 2015-06-30 13F MARTEN TRANS COM 573075108 75,455 60 0.08 1,637 -6.46 0.0024
2015-05-15 2015-03-31 13F MARTEN TRANS COM 573075108 75,395 3,816 5.33 1,750 11.82 0.0027
2015-02-17 2014-12-31 13F MARTEN TRANS COM 573075108 71,579 29,441 69.87 1,565 108.67 0.0020
2014-11-14 2014-09-30 13F MARTEN TRANS COM 573075108 42,138 42,138 228.02 750 240.91 0.0010
2014-02-14 2013-12-31 13F MARTEN TRANS COM 573075108 0 -12,846 -100.00 0 -100.00
2013-11-20 2013-09-30 13F/A-1 MARTEN TRANS COM 573075108 12,846 -32,908 -71.92 220 -69.32 0.0004
2013-11-14 2013-09-30 13F MARTEN TRANS COM 573075108 12,846 220
2013-08-14 2013-06-30 13F MARTEN TRANS COM 573075108 45,754 45,754 717 0.0013
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.