Landstar System, Inc.
US ˙ NasdaqGS ˙ US5150981018

SecurityLSTR / Landstar System, Inc.
InstitutionBrown Advisory Inc
Latest Disclosed Ownership6,432 shares
Latest Disclosed Value $ 1,031,114
Brown Advisory Inc reports 10.84% decrease in ownership of LSTR / Landstar System, Inc.

On May 15, 2026 - Brown Advisory Inc filed a 13F-HR form disclosing ownership of 6,432 shares of Landstar System, Inc. (US:LSTR) valued at $1,031,114 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 7,214 shares of Landstar System, Inc.. This represents a change in shares of -10.84% during the quarter. The current value of the position is $1,384,488 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 LANDSTAR SYS COM 515098101 6,432 -782 -10.84 1,031 -0.48 0.0008
2026-02-13 2025-12-31 13F LANDSTAR SYS COM 515098101 7,214 -38 -0.52 1,037 16.67 0.0014
2025-11-14 2025-09-30 13F LANDSTAR SYS COM 515098101 7,252 -138 -1.87 889 -13.53 0.0012
2025-08-13 2025-06-30 13F LANDSTAR SYS COM 515098101 7,390 -766 -9.39 1,027 -16.16 0.0014
2025-04-30 2025-03-31 13F LANDSTAR SYS COM 515098101 8,156 1,961 31.65 1,225 15.13 0.0018
2025-02-14 2024-12-31 13F LANDSTAR SYS COM 515098101 6,195 -3 -0.05 1,065 -9.06 0.0014
2024-11-13 2024-09-30 13F LANDSTAR SYS COM 515098101 6,198 -20 -0.32 1,171 2.01 0.0015
2024-08-14 2024-06-30 13F LANDSTAR SYS COM 515098101 6,218 -411 -6.20 1,147 -10.18 0.0015
2024-04-24 2024-03-31 13F LANDSTAR SYS COM 515098101 6,629 322 5.11 1,278 4.59 0.0017
2024-02-08 2023-12-31 13F LANDSTAR SYS COM 515098101 6,307 -500 -7.35 1,221 1.41 0.0017
2023-10-25 2023-09-30 13F LANDSTAR SYS COM 515098101 6,807 0 0.00 1,204 -8.09 0.0020
2023-07-31 2023-06-30 13F LANDSTAR SYS COM 515098101 6,807 0 0.00 1,311 7.38 0.0020
2023-05-08 2023-03-31 13F LANDSTAR SYS COM 515098101 6,807 0 0.00 1,220 10.11 0.0021
2023-02-13 2022-12-31 13F LANDSTAR SYS COM 515098101 6,807 0 0.00 1,109 12.72 0.0021
2022-11-14 2022-09-30 13F LANDSTAR SYS COM 515098101 6,807 4,043 146.27 983 144.53 0.0019
2022-11-14 2022-06-30 13F/A-2 LANDSTAR SYS COM 515098101 2,764 -8,042 -74.42 402 -75.34 0.0008
2022-09-13 2022-06-30 13F/A-1 LANDSTAR SYS COM 515098101 2,764 -8,042 402 0.0007
2022-08-02 2022-06-30 13F LANDSTAR SYS COM 515098101 6,378 -5,375 1,098 0.0018
2022-11-14 2022-03-31 13F/A-2 LANDSTAR SYS COM 515098101 10,806 -905 -7.73 1,630 -22.27 0.0024
2022-09-13 2022-03-31 13F/A-1 LANDSTAR SYS COM 515098101 10,806 -905 1,630 0.0023
2022-05-09 2022-03-31 13F LANDSTAR SYS COM 515098101 11,753 42 1,916 0.0026
2022-01-27 2021-12-31 13F LANDSTAR SYS COM 515098101 11,711 945 8.78 2,097 23.43 0.0026
2021-11-12 2021-09-30 13F LANDSTAR SYS COM 515098101 10,766 2 0.02 1,699 -0.12 0.0025
2021-07-29 2021-06-30 13F LANDSTAR SYS COM 515098101 10,764 -727 -6.33 1,701 -10.28 0.0026
2021-05-14 2021-03-31 13F LANDSTAR SYS COM 515098101 11,491 -459 -3.84 1,896 17.84 0.0032
2021-02-12 2020-12-31 13F LANDSTAR SYS COM 515098101 11,950 170 1.44 1,609 8.86 0.0029
2020-11-16 2020-09-30 13F LANDSTAR SYS COM 515098101 11,780 -8 -0.07 1,478 11.63 0.0031
2020-08-14 2020-06-30 13F LANDSTAR SYS COM 515098101 11,788 8 0.07 1,324 17.27 0.0031
2020-05-15 2020-03-31 13F LANDSTAR SYS COM 515098101 11,780 0 0.00 1,129 -15.87 0.0035
2020-02-14 2019-12-31 13F LANDSTAR SYS COM 515098101 11,780 2,000 20.45 1,342 21.89 0.0034
2019-11-14 2019-09-30 13F LANDSTAR SYS COM 515098101 9,780 200 2.09 1,101 6.38 0.0031
2019-08-12 2019-06-30 13F LANDSTAR SYS COM 515098101 9,580 -5,601 -36.89 1,035 -37.69 0.0030
2019-05-15 2019-03-31 13F LANDSTAR SYS COM 515098101 15,181 -11,685 -43.49 1,661 -35.37 0.0047
2019-02-13 2018-12-31 13F LANDSTAR SYS COM 515098101 26,866 -340 -1.25 2,570 -22.59 0.0086
2018-11-13 2018-09-30 13F LANDSTAR SYS COM 515098101 27,206 -3,000 -9.93 3,320 0.64 0.0094
2018-08-10 2018-06-30 13F LANDSTAR SYS COM 515098101 30,206 0 0.00 3,299 -0.42 0.0101
2018-06-28 2018-03-31 13F/A-1 LANDSTAR SYS COM 515098101 30,206 0 0.00 3,313 5.34 0.0107
2018-05-14 2018-03-31 13F LANDSTAR SYS COM 515098101 18,901 -11,305 2,072
2018-02-12 2017-12-31 13F LANDSTAR SYS COM 515098101 30,206 -579 -1.88 3,145 2.51 0.0100
2017-11-13 2017-09-30 13F LANDSTAR SYS COM 515098101 30,785 -5,612 -15.42 3,068 -1.54 0.0102
2017-08-14 2017-06-30 13F LANDSTAR SYS COM 515098101 36,397 5,210 16.71 3,116 16.62 0.0095
2017-05-15 2017-03-31 13F LANDSTAR SYS COM 515098101 31,187 2,241 7.74 2,672 8.22 0.0091
2017-02-13 2016-12-31 13F LANDSTAR SYS COM 515098101 28,946 0 0.00 2,469 25.33 0.0088
2016-11-14 2016-09-30 13F LANDSTAR SYS COM 515098101 28,946 -598 -2.02 1,970 -2.86 0.0068
2016-08-09 2016-06-30 13F LANDSTAR SYS COM 515098101 29,544 -978 -3.20 2,028 2.84 0.0071
2016-05-13 2016-03-31 13F LANDSTAR SYS COM 515098101 30,522 -118,282 -79.49 1,972 -77.40 0.0068
2016-02-08 2015-12-31 13F LANDSTAR SYS COM 515098101 148,804 2,549 1.74 8,727 -5.99 0.0296
2015-11-13 2015-09-30 13F LANDSTAR SYS COM 515098101 146,255 -295,622 -66.90 9,283 -68.58 0.0331
2015-08-11 2015-06-30 13F LANDSTAR SYS COM 515098101 441,877 -61,594 -12.23 29,548 -11.48 0.0962
2015-05-14 2015-03-31 13F LANDSTAR SYS COM 515098101 503,471 -11,829 -2.30 33,380 -10.69 0.1063
2015-02-13 2014-12-31 13F/A-1 LANDSTAR SYS COM 515098101 515,300 -51,070 -9.02 37,374 -8.59 0.1178
2015-02-09 2014-12-31 13F LANDSTAR SYS COM 515098101 516,895 37,478
2014-11-10 2014-09-30 13F LANDSTAR SYS COM 515098101 566,370 -907 -0.16 40,885 12.62 0.1314
2014-08-08 2014-06-30 13F LANDSTAR SYS COM 515098101 567,277 5,968 1.06 36,305 9.22 0.1142
2014-05-13 2014-03-31 13F LANDSTAR SYS COM 515098101 561,309 10,067 1.83 33,241 4.96 0.1059
2014-02-11 2013-12-31 13F LANDSTAR SYS COM 515098101 551,242 1,610 0.29 31,669 2.93 0.1027
2013-11-08 2013-09-30 13F LANDSTAR SYS COM 515098101 549,632 60,721 12.42 30,768 22.20 0.1099
2013-08-13 2013-06-30 13F LANDSTAR SYS COM 515098101 488,911 488,911 25,179 0.1008
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.