Marten Transport, Ltd.
US ˙ NasdaqGS ˙ US5730751089

SecurityMRTN / Marten Transport, Ltd.
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership914 shares
Latest Disclosed Value $ 10,401
Parallel Advisors, LLC ownership in MRTN / Marten Transport, Ltd.

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 914 shares of Marten Transport, Ltd. (US:MRTN) valued at $10,401 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 1,029 shares of Marten Transport, Ltd.. This represents a change in shares of -11.18% during the quarter. The current value of the position is $16,013 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (MRTN) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MRTN / Marten Transport, Ltd. Historical Put/Call Ratio
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)
2026-02-11 2025-12-31 13F MARTEN TRANS LTD COM Stock 573075108 914 -115 -11.18 10 0.00 0.0002
2025-11-13 2025-09-30 13F MARTEN TRANS LTD COM Stock 573075108 1,029 -3,605 -77.79 11 -83.33 0.0002
2025-07-08 2025-06-30 13F MARTEN TRANS LTD COM Stock 573075108 4,634 3,726 410.35 60 400.00 0.0012
2025-04-08 2025-03-31 13F MARTEN TRANS LTD COM Stock 573075108 908 -1,615 -64.01 12 -69.23 0.0003
2025-02-10 2024-12-31 13F MARTEN TRANS LTD COM Stock 573075108 2,523 30 1.20 39 -11.36 0.0009
2024-11-13 2024-09-30 13F MARTEN TRANS LTD COM Stock 573075108 2,493 80 3.32 44 0.00 0.0010
2024-08-08 2024-06-30 13F MARTEN TRANS LTD COM Stock 573075108 2,413 91 3.92 45 4.76 0.0011
2024-05-06 2024-03-31 13F MARTEN TRANS LTD COM Stock 573075108 2,322 -212 -8.37 43 -20.75 0.0012
2024-02-12 2023-12-31 13F MARTEN TRANS LTD COM Stock 573075108 2,534 -196 -7.18 53 0.00 0.0016
2024-05-20 2023-09-30 13F/A-1 MARTEN TRANS LTD COM Stock 573075108 2,730 -1,192 -30.39 54 -36.90 0.0018
2023-11-14 2023-09-30 13F MARTEN TRANS LTD COM Stock 573075108 2,730 -1,192 54 0.0018
2024-05-20 2023-06-30 13F/A-1 MARTEN TRANS LTD COM Stock 573075108 3,922 303 8.37 84 12.00 0.0027
2023-08-04 2023-06-30 13F MARTEN TRANS LTD COM Stock 573075108 3,922 303 84 0.0027
2024-05-20 2023-03-31 13F/A-1 MARTEN TRANS LTD COM Stock 573075108 3,619 194 5.66 76 11.94 0.0026
2023-04-25 2023-03-31 13F MARTEN TRANS LTD COM Stock 573075108 3,619 194 76 0.0026
2023-02-06 2022-12-31 13F MARTEN TRANS LTD COM Stock 573075108 3,425 116 3.51 68 6.35 0.0029
2022-11-10 2022-09-30 13F MARTEN TRANS LTD COM Stock 573075108 3,309 0 0.00 63 12.50 0.0029
2022-08-01 2022-06-30 13F MARTEN TRANS LTD COM Stock 573075108 3,309 -516 -13.49 56 -20.00 0.0026
2022-04-28 2022-03-31 13F MARTEN TRANS LTD COM Stock 573075108 3,825 174 4.77 70 11.11 0.0028
2022-01-20 2021-12-31 13F MARTEN TRANS LTD COM Stock 573075108 3,651 -92 -2.46 63 6.78 0.0023
2021-11-02 2021-09-30 13F/A-1 MARTEN TRANS LTD COM Stock 573075108 3,743 3,034 427.93 59 391.67 0.0024
2021-08-06 2021-06-30 13F MARTEN TRANS LTD COM Stock 573075108 709 -195 -21.57 12 -20.00 0.0005
2021-04-23 2021-03-31 13F MARTEN TRANS LTD COM Stock 573075108 904 -416 -31.52 15 -34.78 0.0007
2021-02-02 2020-12-31 13F MARTEN TRANS LTD COM Stock 573075108 1,320 379 40.28 23 53.33 0.0012
2020-10-27 2020-09-30 13F MARTEN TRANS LTD COM Stock 573075108 941 393 71.72 15 15.38 0.0009
2020-07-16 2020-06-30 13F MARTEN TRANS LTD COM Stock 573075108 548 180 48.91 13 85.71 0.0008
2020-04-27 2020-03-31 13F MARTEN TRANS LTD COM Stock 573075108 368 368 7 0.0006
2020-01-30 2019-12-31 13F MARTEN TRANS LTD COM Stock 573075108 0 -132 -100.00 0 -100.00
2019-11-01 2019-09-30 13F MARTEN TRANS LTD COM Stock 573075108 132 132 3 0.0003
2017-05-12 2017-03-31 13F/A-1 MARTEN TRANS LTD COM Stock 573075108 0 -131 -100.00 0 -100.00
2017-02-14 2016-12-31 13F MARTEN TRANS LTD COM Stock 573075108 131 131 3 0.0007
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F MARTEN TRANS LTD COM Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F MARTEN TRANS LTD COM Stock Call 709 12 n/a n/a n/a
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.