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Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Income Taxes [Line Items]
Net unrecognized tax benefits	$ 3,953,000	$ 5,396,000
Accrued for estimated interest and penalties	1,345,000	1,793,000
Income taxes paid	$ 51,451,000	$ 47,528,000	$ 92,695,000
Domestic Tax Jurisdiction [Member]
Income Taxes [Line Items]
Corporate income tax rate	21.00%	21.00%	21.00%

Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock at Cost	Accumulated Other Comprehensive (Loss) Income
Beginning Balance (in shares) at Dec. 31, 2022		68,382,310
Treasury Stock Beginning Balance (in shares) at Dec. 31, 2022					32,455,300
Beginning Balance at Dec. 31, 2022	$ 887,221	$ 684	$ 258,487	$ 2,635,960	$ (1,992,886)	$ (15,024)
Net income	264,394			264,394
Dividends	(116,709)			(116,709)
Purchases of common stock (in shares)					319,332
Purchases of common stock	(54,267)				$ (54,267)
Issuance of stock related to stock-based compensation plans (in shares)		115,014			6,019
Issuance of stock related to stock-based compensation plans	(9,157)	$ 1	(8,127)		$ (1,031)
Stock-based compensation	4,282		4,282
Other comprehensive loss / income	8,159					8,159
Ending Balance (in shares) at Dec. 30, 2023		68,497,324
Treasury Stock Ending Balance (in shares) at Dec. 30, 2023					32,780,651
Ending Balance at Dec. 30, 2023	983,923	$ 685	254,642	2,783,645	$ (2,048,184)	(6,865)
Net income	195,946			195,946
Dividends	(119,675)			(119,675)
Purchases of common stock (in shares)					452,019
Purchases of common stock	(82,117)				$ (82,117)
Issuance of stock related to stock-based compensation plans (in shares)		61,945			10,526
Issuance of stock related to stock-based compensation plans	(3,928)	$ 1	(2,817)		$ (1,112)
Stock-based compensation	3,435		3,435
Other comprehensive loss / income	$ (5,145)					(5,145)
Ending Balance (in shares) at Dec. 28, 2024		68,559,269
Treasury Stock Ending Balance (in shares) at Dec. 28, 2024	33,243,196				33,243,196
Ending Balance at Dec. 28, 2024	$ 972,439	$ 686	255,260	2,859,916	$ (2,131,413)	(12,010)
Net income	115,007			115,007
Dividends	(122,243)			(122,243)
Purchases of common stock (in shares)					1,281,863
Purchases of common stock	(180,901)				$ (180,901)
Issuance of stock related to stock-based compensation plans (in shares)		31,439			6,923
Issuance of stock related to stock-based compensation plans	(933)		(2)		$ (931)
Stock-based compensation	5,998		5,998
Other comprehensive loss / income	$ 6,298					6,298
Ending Balance (in shares) at Dec. 27, 2025		68,590,708
Treasury Stock Ending Balance (in shares) at Dec. 27, 2025	34,531,982				34,531,982
Ending Balance at Dec. 27, 2025	$ 795,665	$ 686	$ 261,256	$ 2,852,680	$ (2,313,245)	$ (5,712)

Schedule of Information on Non - Vested Restricted Stock Units (Detail) - $ / shares			12 Months Ended
	Jan. 31, 2025	Feb. 02, 2024	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Number of Shares and Deferred Stock Units
Granted	6,050	58,268
Non Vested Restricted Stock and Deferred Stock Units
Number of Shares and Deferred Stock Units
Beginning Balance			47,519	46,348	47,795
Granted			31,439	31,525	22,714
Vested			(23,950)	(25,647)	(24,161)
Forfeited			(1,232)	(4,707)
Ending Balance			53,776	47,519	46,348
Weighted Average Grant Date Fair Value
Beginning Balance			$ 180.17	$ 158.38	$ 138.3
Granted			158.29	187.08	179.32
Vested			176.95	151.16	138.35
Forfeited			174.25	169.92
Ending Balance			$ 168.95	$ 180.17	$ 158.38

Segment Information - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 27, 2025 USD ($) Segment Customer	Dec. 28, 2024 USD ($) Customer	Dec. 30, 2023 USD ($) Customer
Segment Reporting Information [Line Items]
External revenue \| $	$ 4,743,760	$ 4,819,245	$ 5,303,322
Number of segments	2
Number of customers accounting for 10 percent or more of total revenue \| Customer	0	0	0
No single customer accounted for benchmark percentage to be considered major customer	10.00%	10.00%	10.00%
Number of reportable segments	2

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

Significant Accounting Policies

12 Months Ended

Dec. 27, 2025

Accounting Policies [Abstract]

Significant Accounting Policies

(1) Significant Accounting Policies

Consolidation

The consolidated financial statements include the accounts of Landstar System, Inc. and its subsidiary, Landstar System Holdings, Inc. (“LSHI”). Landstar System, Inc. and its subsidiary are herein referred to as “Landstar” or the “Company.” Significant intercompany accounts have been eliminated in consolidation.

Estimates

The preparation of the consolidated financial statements requires the use of management’s estimates. Actual results could differ from those estimates.

Fiscal Year

Landstar’s fiscal year is the 52 or 53 week period ending the last Saturday in December.

Revenue Recognition

The nature of the Company’s freight transportation services and its performance obligations to customers, regardless of the mode of transportation used to perform such services, relate to the safe and

on-time

pick-up

and delivery of a customer’s freight on a

shipment-by-shipment

basis. Landstar customers are typically invoiced on a

shipment-by-shipment

basis at a

pre-defined

rate, payable thirty to sixty

(30-60)

days after the customer’s receipt of such invoice. Payment terms to customers do not contain a significant financing component and the amount owed by the customer does not contain variable terms, embedded or otherwise. We have determined that revenue recognition over the freight transit period provides a faithful depiction of the transfer of services to the customer as our obligation for which we are primarily responsible for fulfilling is performed over the transit period. Accordingly, transportation revenue billed to a customer for the physical transportation of freight and related direct freight expenses are recognized on a gross basis over the freight transit period as the performance obligation to the customer is satisfied. The Company determines the transit period for a given shipment based upon the

pick-up

date and the delivery date, which may be estimated if delivery has not occurred as of the reporting date. Determining the transit period and how much of it has been completed as of a given reporting date may therefore require management to make judgments that affect the timing of revenue recognized. With respect to shipments with a

pick-up

date in one reporting period and a delivery date in another, the Company recognizes such transportation revenue based on relative transit time in each reporting period. A days in transit output method is used to measure the progress of the performance of the Company’s freight transportation services as of the reporting date and a portion of the total revenue that will be billed to the customer once a load is delivered is recognized in each reporting period based on the percentage of total transit time that has been completed at the end of the applicable reporting period. Reinsurance premiums of the insurance segment are recognized over the period earned, which is usually on a m

onthl

y basis. Fuel surcharges billed to customers for freight hauled by independent contractors who provide truck capacity to the Company under exclusive lease arrangements (the “BCO Independent Contractors”) are excluded from revenue and paid in entirety to the BCO Independent Contractors.

Revenue from Contracts with Customers – Disaggregation of Revenue

The following table summarizes (i) the percentage of consolidated revenue generated by mode of transportation and (ii) the total amount of truck transportation revenue hauled by BCO Independent Contractors and Truck Brokerage Carriers generated by equipment type during the fiscal years ended December 27, 2025, December 28, 2024 and December 30, 2023 (dollars in thousands):


	Fiscal Years Ended
Mode	December 27, 2025			December 28, 2024			December 30, 2023
Truck – BCO Independent Contractors		38	%		38	%		38	%
Truck – Truck Brokerage Carriers		53	%		52	%		53	%
Rail intermodal		2	%		2	%		2	%
Ocean and air cargo carriers		5	%		6	%		5	%
Truck Equipment Type
Van equipment	$	2,328,386		$	2,447,810		$	2,742,281
Unsided/platform equipment	$	1,527,802		$	1,455,663		$	1,490,393
Less-than-truckload	$	95,856		$	99,828		$	117,683
Other truck transportation (1)	$	383,970		$	343,253		$	479,173

(1)

Includes power-only, expedited, straight truck, cargo van, and miscellaneous other truck transportation revenue generated by the transportation logistics segment. Power-only refers to shipments where the Company furnishes a power unit and an operator but not trailing equipment, which is typically provided by the shipper or consignee.

Insurance Claim Costs

Landstar provides, primarily on an actuarially determined basis, for the estimated costs of cargo, property, casualty, general liability and workers’ compensation claims both reported and for claims incurred but not reported.

Landstar retains liability through a self-insured retention for commercial trucking claims up to $5 million per occurrence. The Company also maintains third party insurance arrangements providing coverage for commercial trucking liabilities in excess of $5

million. Historically, these third party insurance arrangements were based on policy year periods beginning on May 1 and ending on the subsequent April 30. Beginning with the policy year period commencing May 1, 2025, the Company and its third party insurance providers adjusted the applicable policy year period, beginning in 2026, to commence on June 1 and end on the subsequent May 31. All applicable third party insurance arrangements with a policy period ending April 30, 2026, have been amended to provide for a policy period ending May 31, 2026, as reflected below.

Effective May 1, 2023, the Company entered into a three year commercial auto liability insurance arrangement for losses incurred between $5 million and $10 million (the “2023 Initial Excess Policy”) with a third party insurance company. For commercial trucking claims incurred on or after May 1, 2023 through May 31, 2026, the 2023 Initial Excess Policy provides for an aggregate deductible of $18 million over the thirty-seven month term ending May 31, 2026. After payment of the deductible, the 2023 Initial Excess Policy provides for a limit for a single loss of $5 million, with an aggregate limit of $15 million for the thirty-seven month term ending May 31, 2026.

The Company also maintains third party insurance arrangements providing excess coverage for commercial trucking liabilities in excess of $10 million. These third party arrangements provide coverage on a per occurrence or aggregated basis. The Company from year to year manages the level of its financial exposure to commercial trucking claims in excess of $10 million, including through the use of additional self-insurance, deductibles, aggregate loss limits, quota shares and other structured arrangements with third party insurance companies, based on the availability of coverage within certain excess insurance coverage layers and estimated cost differentia

ls bet

ween proposed premiums from third party insurance companies and historical and actuarially projected losses experienced by the Company at various levels of excess insurance coverage.

Further, the Company retains liability of up to $2,000,000 for each general liability claim, $250,000 for each workers’ compensation claim and $250,000 for each cargo claim. In addition, under reinsurance arrangements by Signature of certain risks of the Company’s BCO Independent Contractors, the Company retains liability of up to $500,000, $1,000,000 or $2,000,000 with respect to certain occupational accident claims and up to $750,000 with respect to certain workers’ compensation claims.

Tires

Tires purchased as part of trailing equipment are capitalized as part of the cost of the e

quipm

ent. Replacement tires are charged to expense when placed in service.

Cash and Cash Equivalents

Included in cash and cash equivalents are all investments, except those provided for collateral, with an original maturity of 3 months or less.

Financial Instruments

The Company’s financial instruments include cash equivalents, short and long-term investments, trade and other accounts receivable, accounts payable, other accrued liabilities, and long-term debt plus current maturities (“Debt”). The carrying value of cash equivalents, trade and other accounts receivable, accounts payable, current insurance claims and other accrued liabilities approximates fair value as the assets and liabilities are short term in nature. Short and long-term investments are carried at fair value as further described in Note 3 in the Company’s consolidated financial statements. The Company’s Debt includes borrowings under the Company’s revolving credit facility, to the extent there are any, plus borrowings relating to finance lease obligations used to finance trailing equipment. The interest rates on borrowings under the revolving credit facility are typically tied to short-term interest rates that adjust monthly and, as such, carrying value approximates fair value. Interest rates on borrowings under finance leases approximate the interest rates that would currently be available to the Company under similar terms and, as such, carrying value approximates fair value.

Trade and Other Receivables

The allowance for doubtful accounts for both trade and other receivables represents management’s estimate of the amount of outstanding receivables that will not be collected. Estimates are used to determine the allowance for doubtful accounts for both trade and other receivables and are generally based on specific identification, historical collection results, current economic trends and changes in payment trends. Following is a summary of the activity in the allowance for doubtful accounts for fiscal years ending December 27, 2025, December 28, 2024 and December 30, 2023 (in thousands):


	Balance at Beginning of Period		Charged to Costs and Expenses		Write-offs, Net of Recoveries			Balance at End of Period
For the Fiscal Year Ended December 27, 2025
Trade receivables	$	12,904	$	5,835	$	(6,249	)	$	12,490
Other receivables		19,276		10,738		(5,402	)		24,612
Other non-current receivables		208		1		—			209

	$	32,388	$	16,574	$	(11,651	)	$	37,311

For the Fiscal Year Ended December 28, 2024
Trade receivables	$	11,738	$	6,449	$	(5,283	)	$	12,904
Other receivables		15,376		11,811		(7,911	)		19,276
Other non-current receivables		206		6		(4	)		208

	$	27,320	$	18,266	$	(13,198	)	$	32,388

For the Fiscal Year Ended December 30, 2023
Trade receivables	$	12,121	$	5,704	$	(6,087	)	$	11,738
Other receivables		11,745		8,325		(4,694	)		15,376
Other non-current receivables		203		3		—			206

	$	24,069	$	14,032	$	(10,781	)	$	27,320

Other Receivables and Other Assets

The Company provides financing to certain independent commission sales agents. Generally, these notes receivable include personal guarantees, may be collateralized by the assets and equity of the borrower and are due in periodic installments, including principal and interest payments, for terms of one to seven years. Notes receivable are recorded at amortized cost, net of the allowance for doubtful accounts. At December 27, 2025 and December 28, 2024, the Company had $30,761,000 and $26,606,000, respectively, of gross notes receivable from independent commission sales agents. The current portion is included within other receivables and the long-term portion is included in other assets in the consolidated balance sheets.

Operating Property

Operating property is recorded at cost. Depreciation is provided on a straight-line basis over the estimated useful lives of the related assets. Buildings and improvements are being depreciated over 30 years. Trailing equipment is being depreciated over 7 to 10 years. Information technology hardware and software is generally being depreciated over 3 to 7 years.

The Company evaluates its operating property whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable in accordance with ASC 360,

Property, Plant and Equipment

. When such events or changes in circumstances occur, a recoverability test is performed based on projected undiscounted cash flows expected to be realized from the use and eventual disposition of the asset or asset group. An impairment is recorded for any excess of the carrying amount over the estimated fair value. Fair value is determined based on quoted market values, discounted cash flows or external appraisals, as appropriate.

Goodwill

Goodwill represents the excess of the purchase price paid over the fair value of the net assets of acquired businesses. The Company has two

reporting units within the transportation logistics segment that report goodwill. The Company reviews its goodwill balance annually for impairment for each reporting unit, unless circumstances dictate more frequent assessments, and in accordance with ASU

2011-08,

Testing Goodwill for Impairment

. ASU

2011-08

permits an initial assessment, commonly referred to as “step zero,” of qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount and also provides a basis for determining whether it is necessary to perform the quantitative analysis required by ASC Topic 350.

As further discussed in Note 14, during the third fiscal quarter of 2025, in connection with the decision to actively market Landstar Metro (as defined below), management identified a triggering event to perform a quantitative goodwill impairment test. As part of its analysis, the Company used a combination of the discounted cash flow method and the market approach. Based on the quantitative assessment, the Company concluded that Landstar Metro’s goodwill was impaired and recorded a

non-cash

impairment charge of $

7,530,000

to goodwill within the transportation logistics segment. In the fourth fiscal quarter of 2025, the Company performed its annual qualitative assessment of remaining goodwill and determined it was more likely than not that the fair value of each of its reporting units would be greater than its carrying amount. Therefore, the Company determined it was not necessary to perform the quantitative goodwill impairment test. During fiscal year 2025, the change in the carrying amount of goodwill was primarily due to the $

7,530,000

impairment

, with the remaining change due to net foreign currency translation.

Income Taxes

Income tax expense is equal to the current year’s liability for income taxes and a provision for deferred income taxes. Deferred tax assets and liabilities are recorded for the future tax effects attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using the enacted tax rates expected to be applied to taxable income in the years in which those temporary differences are expected to be recovered or settled.

Share-Based Payments

The Company’s share-based payment arrangements include restricted stock units (“RSU”),

non-vested

restricted stock, Deferred Stock Units and stock options. The fair value of an RSU with a performance condition is determined based on the market value of the Company’s Common Stock on the date of grant, discounted for lack of marketability for a minimum post-vesting holding requirement. With respect to RSU awards with a performance condition, the Company reports compensation expense ratably over the life of the

award based on an estimated number of units that will vest over the life of the award, multiplied by the fair value of an RSU. The fair value of an RSU with a market condition is determined at the time of grant based on the expected achievement of the market condition at the end of each vesting period. With respect to RSU awards with a market condition, the Company recognizes compensation expense ratably over the requisite service period under an award based on the fair market value of the award at the time of grant, regardless of whet

her

the market condition is satisfied. Previously recognized compensation cost would be reversed, however, if the employee terminated employment prior to completing such requisite service period. The Company estimates the fair value of stock option awards on the date of grant using the Black-Scholes pricing model and recognizes compensation cost for stock option awards expected to vest on a straight-line basis over the requisite service period for the entire award. Forfeitures are estimated at grant date based on historical experience and anticipated employee turnover. The fair values of each share of

non-vested

restricted stock issued and Deferred Stock Unit granted are based on the fair value of a share of the Company’s Common Stock on the date of grant and compensation costs for

non-vested

restricted stock and Deferred Stock Units are recognized on a straight-line basis over the requisite service period for the award.

Earnings Per Share

Basic earnings per common share are based on the weighted average number of common shares outstanding, which includes outstanding

non-vested

restricted stock and outstanding Deferred Stock Units. Diluted earnings per share are based on the weighted average number of common shares outstanding plus the dilutive effect of outstanding stock awards, if applicable. Outstanding RSUs were excluded from the calculation of diluted earnings per share for all fiscal years because the performance metric requirements or market condition for vesting had not been satisfied. During and as of the fiscal years ended December 27, 2025 and December 28, 2024, there were no outstanding stock options issued by the Company. During the fiscal year ended December 30, 2023, the impact on earnings per share of future compensation expense related to outstanding, unvested time-based awards was greater than the incremental impact of outstanding dilutive stock options, and would therefore have an anti-dilutive effect on earnings per share if included in the calculation of earnings per share. Accordingly, the Company had no reconciling items between the average number of common shares outstanding used to calculate basic earnings per common share and the average number of common shares and common share equivalents outstanding used to calculate diluted earnings per share during the fiscal years ended December 27, 2025, December 28, 2024 and December 30, 2023.

Dividends Payable

On December 4, 2025, the Company announced that its Board of Directors declared a special cash dividend of $2.00 per share payable on January 21, 2026 to stockholders of record of its Common Stock as of January 6, 2026. Dividends payable of $68,117,000 related to this special dividend were included in current liabilities in the consolidated balance sheet at December 27, 2025.

On December 9, 2024, the Company announced that its Board of Directors declared a special cash dividend of $2.00 per share payable on January 21, 2025 to stockholders of record of its Common Stock as of January 7, 2025. Dividends payable of $70,632,000 related to this special dividend were included in current liabilities in the consolidated balance sheet at December 28, 2024.

Foreign Currency Translation

Assets and liabilities of the Company’s Canadian and Mexican operations are translated from their functional currency to U.S. dollars using exchange rates in effect at the balance sheet date and revenue and expense accounts are translated at average monthly exchange rates during the period. Adjustments resulting from the translation process are included in accumulated other comprehensive income. Transactional gains and losses arising from receivable and payable balances, including intercompany balances, in the normal course of business that are denominated in a currency other than the functional currency of the operation are recorded in the statements of income when they occur.

Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Detail) - USD ($) $ in Thousands	Dec. 27, 2025	Dec. 28, 2024
Operating Leased Assets [Line Items]
2026	$ 31,764
2027	20,966
2028	17,057
2029	12,678
2030	1,759
Thereafter	0
Total future minimum lease payments	84,224
Less amount representing interest (1.6% to 6.4%)	7,402
Present value of minimum lease payments	76,822
Current maturities of long-term debt	28,342	$ 33,116
Long-term debt, excluding current maturities	48,480	$ 69,191
2026	298
2027	264
2028	94
2029	0
2030	0
Thereafter	0
Total future minimum lease payments	656
Less amount representing interest (1.6% to 6.4%)	41
Present value of minimum lease payments	615
Operating lease, liability, current	$ 289
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current
Operating lease, liability, non-current	$ 326
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Deferred Income Taxes and Other Liabilities, Noncurrent

Equity	12 Months Ended
Equity	Dec. 27, 2025
Equity [Abstract]
Equity	(10) Equity On December 7, 2021, the Landstar System, Inc. Board of Directors authorized the Company to purchase up to 1,912,824 shares of the Company’s Common Stock from time to time in the open market and in privately negotiated transactions. This program was completed during fiscal year 2025. On December 6, 2022, the Landstar System, Inc. Board of Directors authorized the Company to purchase up to 1,900,826 additional shares of the Company’s Common Stock from time to time in the open market and in privately negotiated transactions. On December 4, 2023, the Landstar System, Inc. Board of Directors authorized the Company to purchase up to 319,332 additional shares of its Common Stock from time to time in the open market and in privately negotiated transactions under its share purchase program. As of December 27, 2025, the Company had authorization to purchase in the aggregate up to 1,266,118 shares of its Common Stock under these programs. No specific expiration date has been assigned to the December 6, 2022 or December 4, 2023 authorizations. During fiscal year 2025, Landstar purchased a total of 1,281,863 shares of its Common Stock at a total cost of $180,901,000 pursuant to its previously announced stock purchase program, including $179,139,000 in cash purchases and accrued excise tax of $1,762,000, which is included in other current liabilities in the consolidated balance sheet at December 27, 2025. The Company also paid $717,000 in excise tax on its common stock purchases, which was included in other current liabilities in the consolidated balance sheet at December 28, 2024. The Company has 2,000,000 shares of preferred stock authorized and unissued.

- Definition

The entire disclosure for equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Amounts Recognized in Financial Statements with Respect to Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total cost of the Plans during the period	$ 5,998	$ 3,435	$ 4,282
Amount of related income tax benefit recognized during the period	(1,364)	(1,963)	(3,622)
Net cost of the Plans during the period	$ 4,634	$ 1,472	$ 660

Segment Information (Tables)

12 Months Ended

Dec. 27, 2025

Segment Reporting [Abstract]

Information Regarding Reportable Business Segments

The following tables summarize information about the Company’s reportable business segments as of and for the fiscal years ending December 27, 2025, December 28, 2024 and December 30, 2023 (in thousands):


	Transportation
	Logistics		Insurance		Total
2025
External revenue	$	4,685,115	$	58,645	$	4,743,760
Internal revenue		—		57,694		57,694

Total revenue		4,685,115		116,339		4,801,454

Investment income				13,685		13,685
Purchased transportation		3,688,343				3,688,343
Commissions to agents		387,397				387,397
Other operating costs, net of gains on asset sales/dispositions		61,586				61,586
Insurance and claims		102,336		114,794		217,130
Selling, general and administrative		219,006		11,542		230,548
Depreciation and amortization		46,388				46,388
Impairment of intangible and other assets (1)		32,170				32,170

Operating income		147,889		3,688		151,577

Goodwill		34,005				34,005


	Transportation
	Logistics		Insurance		Total
2024
External revenue	$	4,756,008	$	63,237	$	4,819,245
Internal revenue		—		57,476		57,476

Total revenue		4,756,008		120,713		4,876,721

Investment income				14,810		14,810
Purchased transportation		3,745,241				3,745,241
Commissions to agents		392,751				392,751
Other operating costs, net of gains on asset sales/dispositions		58,781				58,781
Insurance and claims		92,712		78,693		171,405
Selling, general and administrative		204,089		13,619		217,708
Depreciation and amortization		56,738				56,738

Operating income		205,696		43,211		248,907

Goodwill		40,933				40,933


	Transportation
	Logistics		Insurance		Total
2023
External revenue	$	5,230,846	$	72,476	$	5,303,322
Internal revenue		—		67,977		67,977

Total revenue		5,230,846		140,453		5,371,299

Investment income				10,141		10,141
Purchased transportation		4,068,262				4,068,262
Commissions to agents		462,668				462,668
Other operating costs, net of gains on asset sales/dispositions		54,191				54,191
Insurance and claims		101,179		81,039		182,218
Selling, general and administrative		197,819		13,980		211,799
Depreciation and amortization		58,153				58,153

Operating income		288,574		55,575		344,149

Goodwill		42,275				42,275

(1)	Included in the $32,170,000 impairment of intangible and other assets was a goodwill impairment of $7,530,000 within the transportation logistics segment.


	Fiscal Years Ended
	December 27, 2025			December 28, 2024			December 30, 2023
Total revenue	$	4,801,454		$	4,876,721		$	5,371,299
Elimination of internal revenue		(57,694	)		(57,476	)		(67,977	)

Total consolidated revenue		4,743,760			4,819,245			5,303,322
Operating income	$	151,577		$	248,907		$	344,149
Interest and debt expense (income) ( 2 )		996			(5,419	)		(3,946	)

Income before income taxes		150,581			254,326			348,095

(2)

Interest and debt expense (income) includes (1) interest income earned on cash balances held by the transportation logistics segment of $4,590, $9,495 and $7,811 in 2025, 2024 and 2023, respectively and (2) consolidated total interest expense of $5,586, $4,076 and $3,865 in 2025, 2024 and 2023, respectively.

Investments - Additional Information (Detail) - USD ($)	12 Months Ended
Investments - Additional Information (Detail) - USD ($)	Dec. 27, 2025	Dec. 28, 2024
Debt Securities, Available-for-sale [Line Items]
Investments maximum maturity period	5 years
Unrealized gain (loss), net of unrealized gains/losses, on the investments in the bond portfolio	$ (504,000)	$ (3,573,000)
Guarantee Payment of Insurance Claims
Debt Securities, Available-for-sale [Line Items]
Letters of credit outstanding	75,331,000
Current Investments
Debt Securities, Available-for-sale [Line Items]
Investments providing collateral for letters of credit to guarantee insurance claims	55,531,000
Non-Current Investments
Debt Securities, Available-for-sale [Line Items]
Investments providing collateral for letters of credit to guarantee insurance claims	28,170,000
Total non-current investments	$ 91,482,000

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Schedule for Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024
Income Tax Disclosure [Line Items]
Gross unrecognized tax benefits – beginning of the year	$ 6,571	$ 5,454
Gross increases related to current year tax positions	430	598
Gross increases related to prior year tax positions	444	1,344
Lapse of statute of limitations	(2,625)	(825)
Gross unrecognized tax benefits – end of the year	$ 4,820	$ 6,571

Insider Trading Arrangements	12 Months Ended
Insider Trading Arrangements	Dec. 27, 2025
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Income Taxes (Tables)

12 Months Ended

Dec. 27, 2025

Income Tax Disclosure [Abstract]

Schedule of Provisions for Income Taxes

The provisions for income taxes consisted of the following (in thousands):


	Fiscal Years
	2025		2024			2023
Current:
Federal	$	28,799	$	54,621		$	76,827
State		3,099		9,750			13,305
Foreign		1,029		999			1,278

Total current	$	32,927	$	65,370		$	91,410

Deferred:
Federal	$	2,272	$	(5,441	)	$	(8,410	)
State		375		(1,549	)		701

Total deferred	$	2,647	$	(6,990	)	$	(7,709	)

Total:
Federal	$	31,071	$	49,180		$	68,417
State		3,474		8,201			14,006
Foreign		1,029		999			1,278

Total income taxes	$	35,574	$	58,380		$	83,701

Schedule of Provision for Income Taxes on Income Before Income Taxes

The provision for income taxes was based on income before income taxes which consisted of the following (in thousands):


	Fiscal Years
	2025		2024		2023
United States	$	148,000	$	250,586	$	345,146
Foreign		2,581		3,740		2,949

Income before income taxes	$	150,581	$	254,326	$	348,095

Schedule of Deferred Tax Assets and Liabilities

Temporary differences and carryforwards which gave rise to deferred tax assets and liabilities consisted of the following (in thousands):


	Dec. 27, 2025		Dec. 28, 2024
Deferred tax assets:
Receivable valuations	$	9,356	$	7,899
Share-based payments		1,212		1,139
Self-insured claims		8,006		4,659
Other		14,445		11,411

Total deferred tax assets	$	33,019	$	25,108

Deferred tax liabilities:
Operating property	$	44,263	$	35,131
Goodwill		4,942		4,366
Other		4,723		3,213

Total deferred tax liabilities	$	53,928	$	42,710

Net deferred tax liability	$	20,909	$	17,602

Schedule of Income Taxes Calculated on Income from Before Income Taxes and Provision for Income Taxes

The following table summarizes the differences between income taxes calculated at the federal income tax rate of 21% on income before income taxes and the provisions for income taxes (in thousands):


	Fiscal Year 2025						Fiscal Year 2024						Fiscal Year 2023
	Amount			Percent			Amount			Percent			Amount			Percent
U.S federal statutory income tax rate	$	31,622			21.0	%	$	53,409			21.0	%	$	73,100			21.0	%
State and local income taxes, net of federal income tax effect (1)		4,128			2.7	%		5,596			2.2	%		9,703			2.8	%
Foreign tax effects		487			0.3	%		214			0.1	%		659			0.2	%
Effect of cross-border tax laws		(50	)		0.0	%		(59	)		0.0	%		(69	)		0.0	%
Tax credits		(749	)		(0.5	%)		(2,591	)		(1.0	%)		(1,672	)		(0.5	%)
Non-taxable and non-deductible items		1,468			1.0	%		913			0.3	%		518			0.1	%
Changes in unrecognized tax benefits		(1,443	)		(1.0	)%		929			0.4	%		1,421			0.4	%
Other adjustments, net		111			0.1	%		(31	)		0.0	%		41			0.0	%

Effective tax rate	$	35,574			23.6	%	$	58,380			23.0	%	$	83,701			24.0	%

(1)	State taxes in Florida, Illinois, California and Texas make up the majority (greater than 50 percent) of the tax effect in this category.

Schedule for Gross Unrecognized Tax Benefits

The following table summarizes the rollforward of the total amounts of gross unrecognized tax benefits for fiscal years 2025 and 2024 (in thousands):


	Fiscal Years
	2025			2024
Gross unrecognized tax benefits – beginning of the year	$	6,571		$	5,454
Gross increases related to current year tax positions		430			598
Gross increases related to prior year tax positions		444			1,344
Lapse of statute of limitations		(2,625	)		(825	)

Gross unrecognized tax benefits – end of the year	$	4,820		$	6,571

Schedule of Income Taxes Paid

Landstar paid income taxes of $51,451,000 in fiscal year 2025, $47,528,000 in fiscal year 2024 and $92,695,000 in fiscal year 2023, which consisted of the following (in thousands):


	Fiscal Years
	2025		2024		2023
Federal	$	44,000	$	41,000	$	76,000
State		5,807		6,137		14,928
Foreign		1,644		391		1,767

Total income taxes paid, net of refunds	$	51,451	$	47,528	$	92,695

Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 27, 2025 USD ($) Segment $ / shares shares	Dec. 28, 2024 USD ($) $ / shares shares	Dec. 30, 2023 USD ($) shares
Significant Accounting Policies [Line Items]
Number of reporting units \| Segment	2
Dividends payable	$ 68,117,000	$ 70,632,000
Agent notes receivable	$ 30,761,000	$ 26,606,000
Weighted average number of shares outstanding, diluted, adjustment \| shares	0	0	0
Common Stock [Member] \| S 2025 A Dividends [Member]
Significant Accounting Policies [Line Items]
Dividends payable per share \| $ / shares	$ 2
Dividend payable date	Jan. 21, 2026
Dividend record date	Jan. 06, 2026
Dividends payable	$ 68,117,000
Dividend announced date	Dec. 04, 2025
Common Stock [Member] \| S 2024 A Dividends [Member]
Significant Accounting Policies [Line Items]
Dividends payable per share \| $ / shares		$ 2
Dividend payable date		Jan. 21, 2025
Dividend record date		Jan. 07, 2025
Dividends payable		$ 70,632,000
Dividend announced date		Dec. 09, 2024
Buildings And Improvements
Significant Accounting Policies [Line Items]
Depreciated life	30 years
Trailing Equipment \| Maximum
Significant Accounting Policies [Line Items]
Depreciated life	10 years
Trailing Equipment \| Minimum
Significant Accounting Policies [Line Items]
Depreciated life	7 years
Hardware And Software \| Maximum
Significant Accounting Policies [Line Items]
Depreciated life	7 years
Hardware And Software \| Minimum
Significant Accounting Policies [Line Items]
Depreciated life	3 years
Commercial Trucking Claims
Significant Accounting Policies [Line Items]
Company retained aggregate liability	$ 10,000,000
Self insurance excess value maintain third party	5,000,000
Commercial Trucking Claims \| Initial Excess Policy [Member]
Significant Accounting Policies [Line Items]
Liability for claims and claims adjustment expense	18,000,000
Commercial Trucking Claims \| Third Party Insurance [Member] \| Excess Coverage Policy [Member]
Significant Accounting Policies [Line Items]
Self insurance excess value maintain third party	10,000,000
Commercial Trucking Claims \| Maximum
Significant Accounting Policies [Line Items]
Company retained liability per claim	10,000,000
Commercial Trucking Claims \| Maximum \| Initial Excess Policy [Member]
Significant Accounting Policies [Line Items]
Company retained aggregate liability			$ 15,000,000
Commercial Trucking Claims \| Minimum
Significant Accounting Policies [Line Items]
Company retained liability per claim	5,000,000
Commercial Trucking Claims \| Minimum \| Initial Excess Policy [Member]
Significant Accounting Policies [Line Items]
Company retained aggregate liability			$ 5,000,000
General Liability Claim
Significant Accounting Policies [Line Items]
Company retained liability per claim	2,000,000
Workers' Compensation Claim
Significant Accounting Policies [Line Items]
Company retained liability per claim	250,000
Workers' Compensation Claim \| BCO Independent Contractor
Significant Accounting Policies [Line Items]
Company retained liability per claim	750,000
Cargo Claim
Significant Accounting Policies [Line Items]
Company retained liability per claim	250,000
Occupational Reinsurance Claims One [Member] \| BCO Independent Contractor
Significant Accounting Policies [Line Items]
Company retained liability per claim	500,000
Occupational Reinsurance Claims Two [Member] \| BCO Independent Contractor
Significant Accounting Policies [Line Items]
Company retained liability per claim	1,000,000
Occupational Reinsurance Claims Three [Member] \| BCO Independent Contractor
Significant Accounting Policies [Line Items]
Company retained liability per claim	$ 2,000,000
Transportation Logistics [Member]
Significant Accounting Policies [Line Items]
Goodwill, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]	Asset Impairment Charges
Goodwill, Impairment Loss	$ 7,530,000

Investments (Tables)

12 Months Ended

Dec. 27, 2025

Investments, Debt and Equity Securities [Abstract]

Amortized Cost and Fair Value of Available-for-Sale Investments

The amortized cost and fair values of

available-for-sale

investments are as follows at December 27, 2025 and December 28, 2024 (in thousands):


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
December 27, 2025
Money market investments	$	15,046	$	—	$	—	$	15,046
Asset-backed securities		19,380		43		1,128		18,295
Corporate bonds, commercial paper and direct obligations of government agencies		103,425		1,097		523		103,999
U.S. Treasury obligations		9,666		7		—		9,673

Total	$	147,517	$	1,147	$	1,651	$	147,013

December 28, 2024
Money market investments	$	13,473	$	—	$	—	$	13,473
Asset-backed securities		26,785		25		1,770		25,040
Corporate bonds, commercial paper and direct obligations of government agencies		107,180		198		2,026		105,352

Total	$	147,438	$	223	$	3,796	$	143,865

Schedule of Unrealized Loss on Available-for-Sale Investments

For those

available-for-sale

investments with unrealized losses at December 27, 2025 and December 28, 2024, the following table summarizes the duration of the unrealized loss (in thousands):


	Less than 12 months				12 months or longer				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
December 27, 2025
Asset-backed securities	$	2,768	$	386	$	10,425	$	742	$	13,193	$	1,128
Corporate bonds, commercial paper, and direct obligations of government agencies		16,772		56		13,818		467		30,590		523

Total	$	19,540	$	442	$	24,243	$	1,209	$	43,783	$	1,651

December 28, 2024
Asset-backed securities	$	9,663	$	37	$	12,596	$	1,733	$	22,259	$	1,770
Corporate bonds, commercial paper, and direct obligations of government agencies		18,409		169		59,609		1,857		78,018		2,026

Total	$	28,072	$	206	$	72,205	$	3,590	$	100,277	$	3,796

Information Regarding Reportable Business Segments (Parenthetical) (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 27, 2025

Dec. 28, 2024

Dec. 30, 2023

Segment Reporting Information [Line Items]

Impairment of intangible and other assets

$ 32,170

^[1]

$ 0

Total interest expense

5,586

4,076

3,865

Transportation Logistics

Segment Reporting Information [Line Items]

Impairment of intangible and other assets

^[1]

32,170

Goodwill impairment

7,530

Interest income earned on cash

$ 4,590

$ 9,495

$ 7,811

[1]	Included in the $32,170,000 impairment of intangible and other assets was a goodwill impairment of $7,530,000 within the transportation logistics segment.

- Definition

Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References + Details

- Definition

Amount of interest expense classified as operating and nonoperating. Includes, but is not limited to, cost of borrowing accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (d)
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 946
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-Section 45
-Paragraph 3
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479105/946-220-45-3

+ Details

Operating Property - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Property, Plant and Equipment [Line Items]
Finance leased assets gross	$ 152,921,000	$ 175,464,000
Finance leases balance sheet assets by major class net.	108,385,000	131,770,000
Finance leases	$ 7,732,000	$ 62,194,000	$ 4,093,000

Consolidated Statements of Cash Flows - USD ($)
$ in Thousands

12 Months Ended

Dec. 27, 2025

Dec. 28, 2024

Dec. 30, 2023

OPERATING ACTIVITIES

Net income

$ 115,007

$ 195,946

$ 264,394

Adjustments to reconcile net income to net cash provided by operating activities:

Depreciation and amortization

46,388

56,738

58,153

Non-cash interest charges

264

263

Provisions for losses on trade and other accounts receivable

16,574

18,266

14,032

Gains on sales/disposals of operating property

(1,807)

(1,597)

(4,574)

Impairment of intangible and other assets

32,170

^[1]

Deferred income taxes, net

2,647

(6,990)

(7,709)

Stock-based compensation

5,998

3,435

4,282

Changes in operating assets and liabilities:

(Increase) decrease in trade and other accounts receivable

(8,494)

37,834

222,895

Increase in other assets

(11,290)

(16,094)

(2,544)

Decrease in accounts payable

(14,058)

(12,355)

(131,392)

(Decrease) increase in other liabilities

(5,213)

8,509

(15,795)

Increase (decrease) in insurance claims

46,696

2,606

(8,357)

NET CASH PROVIDED BY OPERATING ACTIVITIES

224,882

286,561

393,648

INVESTING ACTIVITIES

Sales and maturities of investments

163,229

112,065

112,555

Purchases of investments

(162,630)

(101,312)

(101,639)

Purchases of operating property

(9,880)

(30,998)

(25,688)

Proceeds from sales of operating property

6,925

9,746

8,294

NET CASH USED BY INVESTING ACTIVITIES

(2,356)

(10,499)

(6,478)

FINANCING ACTIVITIES

Decrease in cash overdraft

(4,379)

(508)

(31,412)

Dividends paid

(124,758)

(120,476)

(117,130)

Proceeds from exercises of stock options

Taxes paid in lieu of shares issued related to stock-based compensation plans

(933)

(3,928)

(9,185)

Purchases of common stock

(179,856)

(81,400)

(53,919)

Principal payments on finance lease obligations

(33,217)

(31,027)

(36,353)

NET CASH USED BY FINANCING ACTIVITIES

(343,143)

(237,339)

(247,971)

Effect of exchange rate changes on cash and cash equivalents

2,472

(4,748)

2,263

(Decrease) increase in cash and cash equivalents, including cash and cash equivalents classified as assets held for sale

(118,145)

33,975

141,462

Less: Net change in cash and cash equivalents classified as assets held for sale

(179)

Net change in cash and cash equivalents

(118,324)

33,975

141,462

Cash and cash equivalents at beginning of period

515,018

481,043

339,581

Cash and cash equivalents at end of period

$ 396,694

$ 515,018

$ 481,043

[1]	Included in the $32,170,000 impairment of intangible and other assets was a goodwill impairment of $7,530,000 within the transportation logistics segment.

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 27, 2025

Accounting Policies [Line Items]

Consolidation

Estimates

The preparation of the consolidated financial statements requires the use of management’s estimates. Actual results could differ from those estimates.

Fiscal Year

Landstar’s fiscal year is the 52 or 53 week period ending the last Saturday in December.

Revenue Recognition

on-time

pick-up

and delivery of a customer’s freight on a

shipment-by-shipment

basis. Landstar customers are typically invoiced on a

shipment-by-shipment

basis at a

pre-defined

rate, payable thirty to sixty

(30-60)

pick-up

onthl

Revenue from Contracts with Customers – Disaggregation of Revenue


	Fiscal Years Ended
Mode	December 27, 2025			December 28, 2024			December 30, 2023
Truck – BCO Independent Contractors		38	%		38	%		38	%
Truck – Truck Brokerage Carriers		53	%		52	%		53	%
Rail intermodal		2	%		2	%		2	%
Ocean and air cargo carriers		5	%		6	%		5	%
Truck Equipment Type
Van equipment	$	2,328,386		$	2,447,810		$	2,742,281
Unsided/platform equipment	$	1,527,802		$	1,455,663		$	1,490,393
Less-than-truckload	$	95,856		$	99,828		$	117,683
Other truck transportation (1)	$	383,970		$	343,253		$	479,173

(1)

Insurance Claim Costs

ls bet

ween proposed premiums from third party insurance companies and historical and actuarially projected losses experienced by the Company at various levels of excess insurance coverage.

Tires

Tires purchased as part of trailing equipment are capitalized as part of the cost of the e

quipm

ent. Replacement tires are charged to expense when placed in service.

Cash And Cash Equivalents

Cash and Cash Equivalents

Included in cash and cash equivalents are all investments, except those provided for collateral, with an original maturity of 3 months or less.

Financial Instruments

Trade and Other Receivables


	Balance at Beginning of Period		Charged to Costs and Expenses		Write-offs, Net of Recoveries			Balance at End of Period
For the Fiscal Year Ended December 27, 2025
Trade receivables	$	12,904	$	5,835	$	(6,249	)	$	12,490
Other receivables		19,276		10,738		(5,402	)		24,612
Other non-current receivables		208		1		—			209

	$	32,388	$	16,574	$	(11,651	)	$	37,311

For the Fiscal Year Ended December 28, 2024
Trade receivables	$	11,738	$	6,449	$	(5,283	)	$	12,904
Other receivables		15,376		11,811		(7,911	)		19,276
Other non-current receivables		206		6		(4	)		208

	$	27,320	$	18,266	$	(13,198	)	$	32,388

For the Fiscal Year Ended December 30, 2023
Trade receivables	$	12,121	$	5,704	$	(6,087	)	$	11,738
Other receivables		11,745		8,325		(4,694	)		15,376
Other non-current receivables		203		3		—			206

	$	24,069	$	14,032	$	(10,781	)	$	27,320

Other Receivables and Other Assets

Operating Property

Property, Plant and Equipment

Goodwill

Goodwill represents the excess of the purchase price paid over the fair value of the net assets of acquired businesses. The Company has two

2011-08,

Testing Goodwill for Impairment

. ASU

2011-08

non-cash

impairment charge of $

7,530,000

impairment

, with the remaining change due to net foreign currency translation.

Income Taxes

Share-Based Payments

The Company’s share-based payment arrangements include restricted stock units (“RSU”),

non-vested

her

non-vested

restricted stock issued and Deferred Stock Unit granted are based on the fair value of a share of the Company’s Common Stock on the date of grant and compensation costs for

non-vested

restricted stock and Deferred Stock Units are recognized on a straight-line basis over the requisite service period for the award.

Earnings Per Share

Basic earnings per common share are based on the weighted average number of common shares outstanding, which includes outstanding

non-vested

Dividends Payable

Foreign Currency Translation

Held for Sale Subsidiary (Tables)

12 Months Ended

Dec. 27, 2025

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Disclosure of Long Lived Assets and Liabilities Held for Sale

As of December 27, 2025, the assets and liabilities of Landstar Metro are presented as held for sale at carrying value. A summary of assets and liabilities associated with Landstar Metro that are held for sale, is presented below (in thousands):


	As of December 27, 2025
Assets held for sale:
Cash and cash equivalents	$	179
Trade and other receivables		8,712
Operating property		7,981
Other assets		6,037
Less: valuation allowance		(10,678	)

Total assets held for sale (1)	$	12,231

Liabilities held for sale:
Accounts payable	$	2,640
Deferred income taxes and other liabilities		4,321

Total liabilities held for sale (1)	$	6,961

Cumulative translation loss of foreign entities held for sale (2)	$	1,205

(1)	Assets and liabilities held for sale are separately presented on the consolidated balance sheets.

(2)	Cumulative translation loss of foreign entities held for sale is included within accumulated other comprehensive loss on the consolidated balance sheets.

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
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+ Details

Impairment of Software Assets - Additional Information (Detail) - USD ($)

12 Months Ended

Dec. 27, 2025

^[1]

Dec. 28, 2024

Dec. 30, 2023

Acquired Indefinite-Lived Intangible Assets [Line Items]

Impairment of intangible and other assets

$ 32,170,000

$ 0

Software Development [Member]

Acquired Indefinite-Lived Intangible Assets [Line Items]

Impairment of intangible and other assets

$ 8,963,000

[1]	Included in the $32,170,000 impairment of intangible and other assets was a goodwill impairment of $7,530,000 within the transportation logistics segment.

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Net income	$ 115,007	$ 195,946	$ 264,394
Other comprehensive income (loss):
Unrealized holding gains on available-for-sale investments, net of tax expense of $660, $604 and $942	2,409	2,205	3,439
Foreign currency translation gains (losses)	3,889	(7,350)	4,720
Other comprehensive income (loss)	6,298	(5,145)	8,159
Comprehensive income	$ 121,305	$ 190,801	$ 272,553

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details

Supply Chain Fraud Matter	12 Months Ended
Supply Chain Fraud Matter	Dec. 27, 2025
Supply Chain Fraud Matter [Abstract]
Supply Chain Fraud Matter	(18) Supply Chain Fraud Matter During the last week of the Company’s 2025 first fiscal quarter, the Company identified a supply chain fraud (the “Supply Chain Fraud Matter”) relating to the Company’s international freight forwarding operations. The Supply Chain Fraud Matter did not involve the Company’s core North American truckload services. In connection with the Supply Chain Fraud Matter, consolidated revenue and purchased transportation as reported in the Company’s fiscal year 2024, 2023 and 2022 financial results were each overstated by approximately 2%, 1%, and less than 0.5%, respectively. As the overstated amount of revenue was approximately equal to the overstated amount of purchased transportation, the impact on each of operating income and net income, as reported, was less than 1% in fiscal year 2024 and less than 0.2% in fiscal years 2023 and 2022, respectively. The Company performed a quantitative and qualitative analysis of the impact of the Supply Chain Fraud Matter in respect of the 2025 first fiscal quarter and the financial statements for each prior fiscal year period during which identified instances of fraud relating to this matter occurred. In connection therewith, the Company concluded that such impact was immaterial with respect to each such fiscal period. The Company’s financial results for the fiscal year ended December 27, 2025 included a $4.8 million pre-tax expense, or $0.10 per basic and diluted share, relating to the Supply Chain Fraud Matter. This expense reflects the total currently anticipated aggregate adverse financial impact to Landstar relating to the Supply Chain Fraud Matter, net of certain actual and anticipated recoveries and before taking into account the cost of legal and other professional fees as well as additional potential recoveries in the future. This expense was reflected in the fiscal year 2025 provision for contractor bad debt expense within other operating costs on the Company’s consolidated statements of income. As of the December 27, 2025 consolidated balance sheet, this amount was included in the allowance for doubtful accounts related to other receivables.

Supply Chain Fraud Matter - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Supply Chain Fraud Matter [Line Items]
Percentage of supply chain fraud matter in consolidated revenue and purchased transportation		2.00%	1.00%
Pre tax expense per share	$ 0.1
Maximum [Member]
Supply Chain Fraud Matter [Line Items]
Percentage of supply chain fraud matter in consolidated revenue and purchased transportation				0.50%
Percentage of supply chain fraud matter in operating income and net income		1.00%	0.20%	0.20%
Cargo and Freight [Member]
Supply Chain Fraud Matter [Line Items]
Freight pre-tax expense	$ 4.8

Operating Property

12 Months Ended

Dec. 27, 2025

Property, Plant and Equipment [Abstract]

Operating Property

(5) Operating Property

Operating property is summarized as follows (in thousands):


	Dec. 27, 2025		Dec. 28, 2024
Land	$	17,389	$	17,389
Buildings and improvements		81,045		80,719
Trailing equipment		485,769		518,524
Information technology hardware and software		142,064		141,029
Other equipment		8,697		10,231

Total operating property, gross		734,964		767,892
Less accumulated depreciation and amortization		473,642		456,547

Total operating property, net	$	261,322	$	311,345

Included above is $152,921,000 in fiscal year 2025 and $175,464,000 in fiscal year 2024 of operating property under finance leases, $108,385,000 and $131,770,000, respectively, net of accumulated depreciation and amortization. Landstar acquired operating property by entering into finance leases in the amount of $7,732,000 in fiscal year 2025, $62,194,000 in fiscal year 2024 and $4,093,000 in fiscal year 2023.

Schedule of Information on Restricted Stock Units (Detail) - $ / shares

12 Months Ended

Jan. 31, 2025

Feb. 02, 2024

Dec. 27, 2025

Dec. 28, 2024

Dec. 30, 2023

Number of Shares

Granted

6,050

58,268

Restricted Stock Units (RSUs)

Number of Shares

Beginning Balance

162,652

132,722

151,780

Granted

54,402

102,997

41,638

Shares earned in excess of target

1,791

^[1]

79,176

^[2]

Vested shares, including shares earned in excess of target

(45,057)

(137,861)

Forfeited

(13,342)

(29,801)

(2,011)

Ending Balance

203,712

162,652

132,722

Weighted Average Grant Date Fair Value

Beginning Balance

$ 144.12

$ 138.93

$ 115.8

Granted

147.09

138.85

164.91

Shares earned in excess of target

51.42

^[1]

98.39

^[2]

Vested shares, including shares earned in excess of target

115.69

97.97

Forfeited

158.95

140.2

142.67

Ending Balance

$ 143.95

$ 144.12

$ 138.93

[1]	Represents additional shares earned under the April 24, 2018 and July 1, 2019 RSU awards as total shareholder return during the applicable performance period exceeded target performance level under each of those awards.
[2]	Represents additional shares earned (i) under the February 1, 2019 and January 31, 2020 RSU awards as fiscal year 2022 financial results exceeded target performance level and (ii) under the April 24, 2018 and July 1, 2019 RSU awards as total shareholder return during the applicable performance period exceeded target performance level under each of those awards.

Investments - Schedule of Unrealized Loss on Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Dec. 27, 2025	Dec. 28, 2024
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	$ 19,540	$ 28,072
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	442	206
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	24,243	72,205
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	1,209	3,590
Available-for-sale investments with unrealized losses, Fair Value, Total	43,783	100,277
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	1,651	3,796
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	2,768	9,663
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	386	37
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	10,425	12,596
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	742	1,733
Available-for-sale investments with unrealized losses, Fair Value, Total	13,193	22,259
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	1,128	1,770
Corporate bonds, commercial paper, and direct obligations of government agencies
Debt Securities, Available-for-sale [Line Items]
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value	16,772	18,409
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss	56	169
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value	13,818	59,609
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss	467	1,857
Available-for-sale investments with unrealized losses, Fair Value, Total	30,590	78,018
Available-for-sale investments with unrealized losses, Unrealized Loss, Total	$ 523	$ 2,026

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Investments - Amortized Cost and Fair Value of Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Dec. 27, 2025	Dec. 28, 2024
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 147,517	$ 147,438
Gross Unrealized Gains	1,147	223
Gross Unrealized Losses	1,651	3,796
Fair Value	147,013	143,865
Money market investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	15,046	13,473
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	15,046	13,473
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	19,380	26,785
Gross Unrealized Gains	43	25
Gross Unrealized Losses	1,128	1,770
Fair Value	18,295	25,040
Corporate bonds, commercial paper, and direct obligations of government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	103,425	107,180
Gross Unrealized Gains	1,097	198
Gross Unrealized Losses	523	2,026
Fair Value	103,999	$ 105,352
U.S. Treasury obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,666
Gross Unrealized Gains	7
Gross Unrealized Losses	0
Fair Value	$ 9,673

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 27, 2025	Dec. 28, 2024
Allowance on trade accounts receivable	$ 12,490	$ 12,904
Allowance on other receivables	18,759	17,812
Accumulated depreciation and amortization on operating property	$ 473,642	$ 456,547
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	160,000,000	160,000,000
Common stock, issued shares	68,590,708	68,559,269
Treasury stock, shares	34,531,982	33,243,196

Retirement Plan	12 Months Ended
Retirement Plan	Dec. 27, 2025
Retirement Benefits [Abstract]
Retirement Plan	(6) Retirement Plan Landstar sponsors an Internal Revenue Code section 401(k) defined contri buti on plan for the benefit of U.S. domiciled full-time employees who have completed three months of service. Eligible employees make voluntary contributions up to 75% of their base salary, subject to certain limitations. Landstar contributes an amount equal to 100% of the first 3% and 50% of the next 2% of such contributions, subject to certain limitations. The expense for the Company-sponsored defined contribution plan included in selling, general and administrative expense was $2,868,000 in fiscal year 2025, $2,805,000 in fiscal year 2024 and $2,812,000 in fiscal year 2023.

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Impairment of Software Assets	12 Months Ended
Impairment of Software Assets	Dec. 27, 2025
Asset Impairment Charges [Abstract]
Impairment of Software Assets	(15) Impairment of Software Assets During the 2025 fiscal year, the Company performed a strategic review of its operations. In connection with this strategic review, management evaluated its transportation management systems (“TMSs”), including the Landstar TMS, a cloud-based platform for truckload freight agent workflow, and the Blue TMS, a cloud-based platform built specifically to service the truckload brokerage contract services market. Management determined that the Landstar TMS, rather than the Blue TMS, would be the Company’s primary TMS used in the future to service the truckload brokerage contract services market. As a result of this decision, the Company also determined to wind-down the Blue TMS and, in connection therewith, the Company performed a recoverability test with respect to potential impairment of the software assets associated with the Blue TMS and determined estimated fair value based on discounted cash flows. The Company subsequently recorded an $ 8,963,000 impairment charge within its transportation logistics segment, which is included in impairment of intangible and other assets within the Company’s consolidated statements of income.

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
Cybersecurity Risk Management and Strategy Disclosure	Dec. 27, 2025
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	The Company recognizes the importance of assessing, identifying, and managing risks associated with cybersecurity threats. These risks include, among other things, operational risks; intellectual property theft; fraud; extortion; harm to employees, customers or the independent commission sales agents and third party capacity providers in our network; violation of privacy or security laws and other litigation and legal risk; and reputational risks. The Company has implemented cybersecurity processes, technologies, and controls to aid in its efforts to assess, identify, and manage such risks, including network and endpoint monitoring by a third party managed security services provider and Landstar IT professionals, access controls, vulnerability assessments, penetration testing, regular information security training for employees, and tabletop exercises to inform our IT professionals’ risk identification and assessment. Landstar maintains an Incident Response Plan that guides the actions the Company is to take in the event of a suspected or confirmed cybersecurity incident. The plan includes processes to triage, investigate, contain, and remediate the incident, and is designed to enable us to comply with applicable legal and regulatory obligations and mitigate financial and reputational damage. We also maintain a Business Continuity Plan, which provides procedures for maintaining the continuity of critical business processes in the event of business interruption, including any that involve cybersecurity incidents that may significantly impact our operations. Our cybersecurity risk management processes incorporate appropriate industry standards and are designed using the frameworks developed by National Institute of Standards and Technology (“NIST”) as a guide. The Company has established a Management Risk Committee. The Management Risk Committee meets at least quarterly and considers cybersecurity threat risks alongside other types of risks as part of the Company’s risk assessment and management process. Members of the Management Risk Committee regularly engage in discussions and meetings relating to cybersecurity risk management and strategy processes and the prevention, detection, mitigation and remediation of cybersecurity incidents. Members of our IT department collaborate with the Management Risk Committee, as necessary, to gather insights for identifying and assessing cybersecurity threats, their severity, and potential mitigations. Our cybersecurity risk management and strategy processes are led by the Chief Information Officer and the Chief Information Security Officer, who are each members of the Management Risk Committee. The Company has also established an Executive Risk Committee that meets monthly and focuses on enterprise risk management. The Executive Risk Committee is comprised of the Chief Executive Officer, the Chief Financial Officer, the Chief Safety and Operations Officer and the General Counsel. The Chief Information Officer and the Chief Information Security Officer regularly meet with the Executive Risk Committee to review and consider cybersecurity-related risks from an enterprise risk management perspective. The Chief Information Security Officer leads a team of IT professionals that includes individuals with significant cybersecurity expertise. The Chief Information Security Officer has over 30 years of experience in cybersecurity and information technology across multiple publicly traded organizations, with the responsibility for leading and managing cybersecurity, developing cybersecurity strategy, and designing and implementing effective cybersecurity programs. Prior to joining the Company in June 2025, the Chief Information Security Officer served as Chief Information Security Officer of LL Flooring. The team of IT professionals led by the Chief Information Security Officer includes individuals with relevant academic credentials and industry-recognized certifications, including Certified Information Security Systems Professional (CISSP), GIAC Foundational Cybersecurity Technologies (GFACT), GIAC Certified Incident Handler Certification (GCIH), GIAC Security Essentials (GSEC), ITIL 4 Foundations, Qualys Certified Specialist—Vulnerability Management Detection & Response, Microsoft Technology Associate: Security Fundamentals, Google Cloud Certified: Professional Cloud Security Engineer, Cisco Certified CyberOps Associate, Cisco Certified Network Associate (CCNA), CompTIA Security+, and CompTIA Pentest+. The Company also regularly engages with consultants, auditors, and other third parties, including by having an independent third party Qualified Security Assessor review our cybersecurity program twice each year to help identify areas for continued focus and enhancement. These third parties analyze data on the interactions of users of our information technology resources, including employees, and conduct penetration tests and vulnerability scanning exercises to assess the performance of our cybersecurity controls, systems and processes. Our cybersecurity risk management processes also address risks associated with our use of third party service providers, including those who have access to our employee data or our systems that support customers and our network of independent commission sales agents and third party capacity providers. Third party risks are included within our enterprise risk management assessment program, as well as our cybersecurity-specific risk identification program. Cybersecurity considerations affect the selection and oversight of our third party service providers. We perform diligence on third parties that have access to our systems, data or facilities that house such systems or data, and continually monitor cybersecurity threats identified through such diligence. Additionally, we may require certain third parties to agree by contract to manage their cybersecurity risks in specified ways, and to agree to be subject to cybersecurity audits, which we conduct as appropriate. During the period covered by this Annual Report, the Company has not experienced any cybersecurity incidents that have materially affected or are reasonably likely to materially affect our business strategy, results of operations, or financial condition. However, institutions like us, as well as our employees, service providers and other third parties, have experienced a significant increase in information security and cybersecurity risk in recent years and will likely continue to be the target of increasingly sophisticated cyber attacks. The Company describes whether and how risks from identified cybersecurity threats materially affected or are reasonably likely to materially affect us, including our business strategy, results of operations, or financial condition, under the heading “Disruptions or failures in the Company’s computer systems; cyber and other information security incidents” included as part of our risk factor disclosure at Item 1A of this Annual Report on Form 10-K, which disclosures are incorporated by reference herein. Cybersecurity is an important part of our risk management processes and an area of focus for our Board and management. The Safety and Risk Committee of the Board is responsible for the oversight of risks from cybersecurity threats. At least semi-annually, the Management Risk Committee and, subsequently, the Safety and Risk Committee of the Board receive an overview of our cybersecurity threat risk management and strategy processes from the Chief Information Officer and Chief Information Security Officer. These sessions typically cover topics such as data security posture, results from third party assessments, progress towards risk-mitigation-related goals, our incident response plan, cybersecurity vendors and products, and material risks from cybersecurity threats, incidents and developments, as well as the steps management has taken to respond to such risks. Material cybersecurity threat risks are also considered during separate Board and Board committee meeting discussions relating to matters such as enterprise risk management, IT strategy, internal controls over financial reporting and business continuity planning.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	The Company recognizes the importance of assessing, identifying, and managing risks associated with cybersecurity threats. These risks include, among other things, operational risks; intellectual property theft; fraud; extortion; harm to employees, customers or the independent commission sales agents and third party capacity providers in our network; violation of privacy or security laws and other litigation and legal risk; and reputational risks. The Company has implemented cybersecurity processes, technologies, and controls to aid in its efforts to assess, identify, and manage such risks, including network and endpoint monitoring by a third party managed security services provider and Landstar IT professionals, access controls, vulnerability assessments, penetration testing, regular information security training for employees, and tabletop exercises to inform our IT professionals’ risk identification and assessment.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]	During the period covered by this Annual Report, the Company has not experienced any cybersecurity incidents that have materially affected or are reasonably likely to materially affect our business strategy, results of operations, or financial condition. However, institutions like us, as well as our employees, service providers and other third parties, have experienced a significant increase in information security and cybersecurity risk in recent years and will likely continue to be the target of increasingly sophisticated cyber attacks. The Company describes whether and how risks from identified cybersecurity threats materially affected or are reasonably likely to materially affect us, including our business strategy, results of operations, or financial condition, under the heading “Disruptions or failures in the Company’s computer systems; cyber and other information security incidents” included as part of our risk factor disclosure at Item 1A of this Annual Report on Form 10-K, which disclosures are incorporated by reference herein.
Cybersecurity Risk Board of Directors Oversight [Text Block]	Cybersecurity is an important part of our risk management processes and an area of focus for our Board and management. The Safety and Risk Committee of the Board is responsible for the oversight of risks from cybersecurity threats. At least semi-annually, the Management Risk Committee and, subsequently, the Safety and Risk Committee of the Board receive an overview of our cybersecurity threat risk management and strategy processes from the Chief Information Officer and Chief Information Security Officer. These sessions typically cover topics such as data security posture, results from third party assessments, progress towards risk-mitigation-related goals, our incident response plan, cybersecurity vendors and products, and material risks from cybersecurity threats, incidents and developments, as well as the steps management has taken to respond to such risks. Material cybersecurity threat risks are also considered during separate Board and Board committee meeting discussions relating to matters such as enterprise risk management, IT strategy, internal controls over financial reporting and business continuity planning.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	The Company has established a Management Risk Committee. The Management Risk Committee meets at least quarterly and considers cybersecurity threat risks alongside other types of risks as part of the Company’s risk assessment and management process. Members of the Management Risk Committee regularly engage in discussions and meetings relating to cybersecurity risk management and strategy processes and the prevention, detection, mitigation and remediation of cybersecurity incidents. Members of our IT department collaborate with the Management Risk Committee, as necessary, to gather insights for identifying and assessing cybersecurity threats, their severity, and potential mitigations. Our cybersecurity risk management and strategy processes are led by the Chief Information Officer and the Chief Information Security Officer, who are each members of the Management Risk Committee. The Company has also established an Executive Risk Committee that meets monthly and focuses on enterprise risk management. The Executive Risk Committee is comprised of the Chief Executive Officer, the Chief Financial Officer, the Chief Safety and Operations Officer and the General Counsel. The Chief Information Officer and the Chief Information Security Officer regularly meet with the Executive Risk Committee to review and consider cybersecurity-related risks from an enterprise risk management perspective.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	The Chief Information Security Officer leads a team of IT professionals that includes individuals with significant cybersecurity expertise. The Chief Information Security Officer has over 30 years of experience in cybersecurity and information technology across multiple publicly traded organizations, with the responsibility for leading and managing cybersecurity, developing cybersecurity strategy, and designing and implementing effective cybersecurity programs. Prior to joining the Company in June 2025, the Chief Information Security Officer served as Chief Information Security Officer of LL Flooring. The team of IT professionals led by the Chief Information Security Officer includes individuals with relevant academic credentials and industry-recognized certifications, including Certified Information Security Systems Professional (CISSP), GIAC Foundational Cybersecurity Technologies (GFACT), GIAC Certified Incident Handler Certification (GCIH), GIAC Security Essentials (GSEC), ITIL 4 Foundations, Qualys Certified Specialist—Vulnerability Management Detection & Response, Microsoft Technology Associate: Security Fundamentals, Google Cloud Certified: Professional Cloud Security Engineer, Cisco Certified CyberOps Associate, Cisco Certified Network Associate (CCNA), CompTIA Security+, and CompTIA Pentest+.

Share-Based Payment Arrangements

12 Months Ended

Dec. 27, 2025

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Payment Arrangements

(9) Share-Based Payment Arrangements

As of December 27, 2025, the Company has an employee equity incentive plan, the 2011 equity incentive plan (the “2011 EIP”). The Company also has a stock compensation plan for members of its Board of Directors, the 2022 Directors Stock Compensation Plan (the “2022 DSCP”). 6,000,000 shares of the Company’s Common Stock were authorized for issuance under the 2011 EIP and 200,000 shares of the Company’s Common Stock were authorized for issuance under the 2022 DSCP. The 2011 EIP and 2022 DSCP are each referred to herein as a “Plan,” and, collectively, as the “Plans.” Amounts recognized in the financial statements with respect to these Plans are as follows (in thousands):


	Fiscal Years
	2025			2024			2023
Total cost of the Plans during the period	$	5,998		$	3,435		$	4,282
Amount of related income tax benefit recognized during the period		(1,364	)		(1,963	)		(3,622	)

Net cost of the Plans during the period	$	4,634		$	1,472		$	660

Included in income tax benefits recognized in the fiscal years ended December 27, 2025, December 28, 2024 and December 30, 2023 were tax deficiencies (excess tax benefits) from stock-based awards

of $106,000,

(

$1,122,000

)

and

(

$2,830,000

)

, respectively.

As of December 27, 2025, there were 172,859 shares of the Company’s Common Stock reserved for issuance under the 2022 DSCP and 2,681,782 shares of the Company’s Common Stock reserved for issuance under the 2011 EIP.

Restricted Stock Units

The following table summarizes information regarding the Company’s outstanding restricted stock unit (“RSU”) awards with either a performance condition or a market condition under the Plans:


	Number of RSUs			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2022		151,780		$	115.80
Granted		41,638		$	164.91
Shares earned in excess of target (1)		79,176		$	98.39
Vested shares, including shares earned in excess of target		(137,861	)	$	97.97
Forfeited		(2,011	)	$	142.67

Outstanding at December 30, 2023		132,722		$	138.93
Granted		102,997		$	138.85
Shares earned in excess of target (2)		1,791		$	51.42
Vested shares, including shares earned in excess of target		(45,057	)	$	115.69
Forfeited		(29,801	)	$	140.20

Outstanding at December 28, 2024		162,652		$	144.12
Granted		54,402		$	147.09
Forfeited		(13,342	)	$	158.95

Outstanding at December 27, 2025		203,712		$	143.95

(1)

Represents additional shares earned (i) under the February 1, 2019 and January 31, 2020 RSU awards as fiscal year 2022 financial results exceeded target performance level and (ii) under the April 24, 2018 and July 1, 2019 RSU awards as total shareholder return during the applicable performance period exceeded target performance level under each of those awards.

(2)	Represents additional shares earned under the April 24, 2018 and July 1, 2019 RSU awards as total shareholder return during the applicable performance period exceeded target performance level under each of those awards.

During fiscal years 2025, 2024 and 2023, the Company granted RSUs with a performance condition. During fiscal years 2025 and 2024, the Company also granted RSUs with a market condition.

RSUs with a performance condition granted on January 31, 2025 and February 3, 2025 may vest on January 31 of 2028, 2029 and 2030 based on growth in operating income and

pre-tax

income per diluted share from continuing operations as compared to the results from the 2024 fiscal year. RSUs with a performance condition granted on February 2, 2024 may vest on January 31 of 2027, 2028 and 2029 based on growth in operating income and

pre-tax

income per diluted share from continuing operations as compared to the results from the 2023 fiscal year. RSUs with a performance condition granted on February 3, 2023 may vest on January 31 of 2026, 2027 and 2028 based on growth in operating income and

pre-tax

income per diluted share from continuing operations as compared to the results from the 2022 fiscal year. At the time of grant, the target number of common shares available for issuance under the January 31, 2025, February 2, 2024 and February 3, 2023 grants equals

100

% of the number of RSUs granted, and the maximum number of common shares available for issuance under the January 31, 2025, February 2, 2024 and February 3, 2023 grants equals

200

% of the number of RSUs credited to the recipient. In the event actual results exceed the target, the number of shares that will be granted will exceed the number of RSUs granted. The fair value of an RSU with a performance condition was determined based on the market value of the Company’s Common Stock on the date of grant, discounted for lack of marketability for a minimum post-vesting holding requirement. The discount rate due to lack of marketability used for RSU award grants with a performance condition for all periods was

%. With respect to RSU awards with a performance condition, the Company reports compensation expense over the life of the award based on an estimated number of units that will vest over the life of the award, multiplied by the fair value of an RSU at the time of grant.

On January 31, 2025 and February 2, 2024, the Company granted

6,050

and

58,268

RSUs, respectively, that vest based on a market condition. These RSUs may vest based on the achievement of the target Company’s total shareholder return (“TSR”) compound annual growth rate, adjusted to reflect dividends (if any) paid during the periods and capital adjustments as may be necessary, and are eligible to vest annually starting after the sixth anniversary of the grant date and concluding after the tenth anniversary of the grant date. The fair value of these RSU awards was determined at the time of grants based on the expected achievement of the market condition. With respect to these RSU awards, the Company reports compensation expense ratably over the service period of the awards based on the number of units granted multiplied by the grant date fair value of the RSU. Previously recognized compensation cost would be reversed only if the employee did not complete the requisite service period due to termination of employment.

The

Company recognized approximately $

1,102,000

, ($

800,000

)

and $

581,000

of share-based compensation expense (benefit) related to RSU awards in fiscal years 2025, 2024 and 2023, respectively. As of December 27, 2025, there was a maximum of $

51.2

million of total unrecognized compensation cost related to RSU awards granted under the Plans with an expected average remaining life of approximately

2.8

years. With respect to RSU awards with a performance condition, the amount of future compensation expense to be recognized will be determined based on future operating results.

Non-vested

Restricted Stock and Deferred Stock Units

The 2011 EIP provides the Compensation Committee of the Board of Directors with the authority to issue shares of Common Stock of the Company, subject to certain vesting and other restrictions on transfer (“restricted stock”).

The following table summarizes information regarding the Company’s outstanding shares of

non-vested

restricted stock and Deferred Stock Units (defined below) under the Plans:


	Number of Shares and Deferred Stock Units			Weighted Average Grant Date Fair Value
Non-vested at December 31, 2022		47,795		$	138.30
Granted		22,714		$	179.32
Vested		(24,161	)	$	138.35

Non-vested at December 30, 2023		46,348		$	158.38
Granted		31,525		$	187.08
Vested		(25,647	)	$	151.16
Forfeited		(4,707	)	$	169.92

Non-vested at December 28, 2024		47,519		$	180.17
Granted		31,439		$	158.29
Vested		(23,950	)	$	176.95
Forfeited		(1,232	)	$	174.25

Non-vested at December 27, 2025		53,776		$	168.95

The fair value of each share of

non-vested

restricted stock issued and Deferred Stock Unit granted under the Plans is based on the fair value of a share of the Company’s Common Stock on the date of grant. Shares of

non-vested

restricted stock are generally subject to vesting in three equal annual installments either on the first, second and third anniversary of the date of grant or the third, fourth and fifth anniversary of the date of the grant, in two equal annual installments on the first and second anniversary of the date of the grant or 100% on the first, third or fifth anniversary of the date of the grant. For restricted stock awards granted under the 2022 DSCP, each recipient may elect to defer receipt of shares and instead receive restricted stock units (“Deferred Stock Units”), which represent contingent rights to receive shares of the Company’s Common Stock on the date of recipient separation from service from the Board of Directors, or, if earlier, upon a change in control event of the Company. Deferred Stock Units become vested 100% on the first anniversary of the date of the grant. Deferred Stock Units do not represent actual ownership in shares of the Company’s Common Stock and the recipient does not have voting rights or other incidents of ownership until the shares are issued. However, Deferred Stock Units do contain the right to receive dividend equivalent payments prior to settlement into shares.

As of December 27, 2025, there was $4,549,000 of total unrecognized compensation cost related to

non-vested

shares of restricted stock and Deferred Stock Units granted under the Plans. The unrecognized compensation cost related to these

non-vested

shares of restricted stock and Deferred Stock Units is expected to be recognized over a weighted average period of 1.6 years.

Stock Options

The Company did not grant any stock options during its 2023, 2024 or 2025 fiscal years. Options outstanding under the Plans generally become exercisable in either five equal annual installments commencing on the first anniversary of the date of grant or 100% on the fifth anniversary from the date of grant, subject to acceleration in certain circumstances. All options granted under the Plans expire on the tenth anniversary of the date of grant. Under the Plans, the exercise price of each option equals the fair market value of the Company’s Common Stock on the date of grant.

The fair value of each option grant on its grant date was calculated using the Black-Scholes option pricing model. The Company utilized historical data, including exercise patterns and employee departure behavior, in estimating the term that options will be outstanding. Expected volatility was based on historical volatility and other factors, such as expected changes in volatility arising from planned changes to the Company’s business, if any. The risk-free interest rate was based on the yield of zero coupon U.S. Treasury bonds for terms that approximated the terms of the options granted.

The Company had no issued and outstanding vested or unvested stock options or unrecognized compensation costs related to

non-vested

stock options granted under the Plans as of or for the fiscal years ended December 27, 2025 and December 28, 2024.

The following table summarizes information regarding the Company’s outstanding stock options under the Plans for fiscal year 2023:


	Options Outstanding					Options Exercisable
	Number of Options			Weighted Average Exercise Price per Share		Number of Options		Weighted Average Exercise Price per Share
Options at December 31, 2022		1,900		$	56.40		1,900	$	56.40
Exercised		(1,900	)	$	56.40

Options at December 30, 2023		—					—

The total

intrinsic value of stock options exercised during fiscal year 2023 was $

218,000

Directors’ Stock Compensation Plan

Directors of the Company who are not employees of the Company (each an “Eligible Director”) are entitled under the 2022 DSCP to receive a grant of such number of restricted shares of the Company’s Common Stock or Deferred Stock Units equal to the quotient of $150,000 divided by the fair market value of a share of Common Stock on the date immediately following the date of each annual meeting of the stockholders of the Company (an “Annual Meeting”). In fiscal year 2025, 8,591 restricted shares were granted to Eligible Directors. In fiscal year 2024, 5,810 restricted shares were granted to Eligible Directors. In fiscal year 2023, 5,957 restricted shares were granted to Eligible Directors. No Deferred Stock Units were issued in fiscal years 2025, 2024 or 2023. Restricted shares granted in 2025, 2024 and 2023 vest on the date of the next Annual Meeting. During fiscal years 2025, 2024 and 2023, $1,062,000, $1,053,000 and $1,050,000, respectively, of compensation cost was recorded for the grant of these restricted shares.

Operating Property - Schedule of Operating Property (Detail) - USD ($) $ in Thousands	Dec. 27, 2025	Dec. 28, 2024
Property, Plant and Equipment [Line Items]
Land	$ 17,389	$ 17,389
Buildings and improvements	81,045	80,719
Trailing equipment	485,769	518,524
Information technology hardware and software	142,064	141,029
Other equipment	8,697	10,231
Total operating property, gross	734,964	767,892
Less accumulated depreciation and amortization	473,642	456,547
Total operating property, net	$ 261,322	$ 311,345

Investments

12 Months Ended

Dec. 27, 2025

Investments, Debt and Equity Securities [Abstract]

Investments

(3) Investments

Investments include primarily investment-grade corporate bonds, asset-backed securities, commercial paper and U.S. Treasury obligations having maturities of up to five years (the “bond portfolio”) and money market investments. Investments in the bond portfolio are reported as

available-for-sale

and are carried at fair value. Investments maturing less than one year from the balance sheet date are included in short-term investments and investments maturing more than one year from the balance sheet date are included in other assets in the consolidated balance sheets. Management performs an analysis of the nature of the unrealized losses on

available-for-sale

investments to determine whether an allowance for credit loss is necessary. Unrealized losses, representing the excess of the purchase price of an investment over its fair value as of the end of a period, considered to be a result of credit-related factors, are to be included as a charge in the statement of income, while unrealized losses considered to be a result of

non-credit-related

factors are to be included as a component of shareholders’ equity. Investments whose values are based on quoted market prices in active markets are classified within Level 1. Investments that trade in markets that are not considered to be active, but are valued based on quoted market prices, are classified within Level 2. As Level 2 investments include positions that are not traded in active markets, valuations may be adjusted to reflect illiquidity and/or

non-transferability,

which are generally based on available market information. Any transfers between levels are recognized as of the beginning of any reporting period. Fair value of the bond portfolio was determined using Level 1 inputs related to U.S. Treasury obligations and money market investments and Level 2 inputs related to investment-grade corporate bonds, asset-backed securities, commercial paper and direct obligations of government agencies. Unrealized losses, net of unrealized gains, on the investments in the bond portfolio were $504,000 and $3,573,000 at December 27, 2025 and December 28, 2024, respectively.

The amortized cost and fair values of

available-for-sale

investments are as follows at December 27, 2025 and December 28, 2024 (in thousands):


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
December 27, 2025
Money market investments	$	15,046	$	—	$	—	$	15,046
Asset-backed securities		19,380		43		1,128		18,295
Corporate bonds, commercial paper and direct obligations of government agencies		103,425		1,097		523		103,999
U.S. Treasury obligations		9,666		7		—		9,673

Total	$	147,517	$	1,147	$	1,651	$	147,013

December 28, 2024
Money market investments	$	13,473	$	—	$	—	$	13,473
Asset-backed securities		26,785		25		1,770		25,040
Corporate bonds, commercial paper and direct obligations of government agencies		107,180		198		2,026		105,352

Total	$	147,438	$	223	$	3,796	$	143,865

For those

available-for-sale

investments with unrealized losses at December 27, 2025 and December 28, 2024, the following table summarizes the duration of the unrealized loss (in thousands):


	Less than 12 months				12 months or longer				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
December 27, 2025
Asset-backed securities	$	2,768	$	386	$	10,425	$	742	$	13,193	$	1,128
Corporate bonds, commercial paper, and direct obligations of government agencies		16,772		56		13,818		467		30,590		523

Total	$	19,540	$	442	$	24,243	$	1,209	$	43,783	$	1,651

December 28, 2024
Asset-backed securities	$	9,663	$	37	$	12,596	$	1,733	$	22,259	$	1,770
Corporate bonds, commercial paper, and direct obligations of government agencies		18,409		169		59,609		1,857		78,018		2,026

Total	$	28,072	$	206	$	72,205	$	3,590	$	100,277	$	3,796

The Company believes unrealized losses on investments were primarily caused by rising interest rates rather than changes in credit quality. The Company expects to recover, through collection of all of the contractual cash flows of each security, the amortized cost basis of these securities as it does not intend to sell, and does not anticipate being required to sell, these securities before recovery of the cost basis. For these reasons, no losses have been recognized in the Company’s consolidated statements of income.

Short-term investments include $55,531,000 in current maturities of investments held by the Company’s insurance segment at December 27, 2025. The

non-current

portion of the bond portfolio of $91,482,000 is included in other assets. The short-term investments, together with $28,170,000 of

non-current

investments, provide collateral for the $75,331,000 of letters of credit issued to guarantee payment of insurance claims.

Investment income represents the earnings on the insurance segment’s assets. Investment income earned from the assets of the in

sur

ance segment are included as a component of operating income as the investment of these assets is critical to providing collateral, liquidity and earnings with respect to the operation of the Company’s insurance programs.

Equity - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023	Dec. 04, 2023	Dec. 06, 2022	Dec. 07, 2021
Equity [Line Items]
Shares authorized for repurchase				319,332	1,900,826	1,912,824
Remaining shares available for repurchase	1,266,118
Payments for repurchases of common stock excise tax	$ 717
Preferred stock, shares authorized and unissued	2,000,000
Accrued excise tax payable	$ 1,762	$ 717
Treasury stock, common, value	$ 180,901	$ 82,117	$ 54,267
Treasury Stock, Common Shares [Member]
Equity [Line Items]
Common stock repurchased during period, shares	1,281,863	452,019	319,332
Payments for repurchases of common stock excluding excise tax	$ 179,139
Treasury stock, common, value	$ 180,901	$ 82,117	$ 54,267

Schedule of Income Taxes Calculated on Income from Before Income Taxes and Provision for Income Taxes (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 27, 2025

Dec. 28, 2024

Dec. 30, 2023

Income Tax Disclosure [Line Items]

State and local income taxes, net of federal income tax effect

^[1]

$ 4,128

$ 5,596

$ 9,703

State and local income taxes, net of federal income tax effect, Percent

^[1]

2.70%

2.20%

2.80%

Foreign tax effects

$ 487

$ 214

$ 659

Foreign tax effects, Percent

0.30%

0.10%

0.20%

Effect of cross-border tax laws

$ (50)

$ (59)

$ (69)

Effect of cross-border tax laws, Percent

0.00%

Tax credits

$ (749)

$ (2,591)

$ (1,672)

Tax credits, Percent

(0.50%)

(1.00%)

(0.50%)

Non-taxable and non-deductible items

$ 1,468

$ 913

$ 518

Non-taxable and non-deductible items, Percent

1.00%

0.30%

0.10%

Changes in unrecognized tax benefits

$ (1,443)

$ 929

$ 1,421

Changes in unrecognized tax benefits, Percent

(1.00%)

0.40%

Other adjustments, net

$ 111

$ (31)

$ 41

Other adjustments, net, Percent

0.10%

0.00%

Total income taxes

$ 35,574

$ 58,380

$ 83,701

Effective tax rate, Percent

23.60%

23.00%

24.00%

Domestic Tax Jurisdiction [Member]

Income Tax Disclosure [Line Items]

U.S federal statutory income tax rate

$ 31,622

$ 53,409

$ 73,100

U.S federal statutory income tax rate, Percent

21.00%

[1]	State taxes in Florida, Illinois, California and Texas make up the majority (greater than 50 percent) of the tax effect in this category.

Income Taxes

12 Months Ended

Dec. 27, 2025

Income Tax Disclosure [Abstract]

Income Taxes

(4) Income Taxes

The provisions for income taxes consisted of the following (in thousands):


	Fiscal Years
	2025		2024			2023
Current:
Federal	$	28,799	$	54,621		$	76,827
State		3,099		9,750			13,305
Foreign		1,029		999			1,278

Total current	$	32,927	$	65,370		$	91,410

Deferred:
Federal	$	2,272	$	(5,441	)	$	(8,410	)
State		375		(1,549	)		701

Total deferred	$	2,647	$	(6,990	)	$	(7,709	)

Total:
Federal	$	31,071	$	49,180		$	68,417
State		3,474		8,201			14,006
Foreign		1,029		999			1,278

Total income taxes	$	35,574	$	58,380		$	83,701

The provision for income taxes was based on income before income taxes which consisted of the following (in thousands):


	Fiscal Years
	2025		2024		2023
United States	$	148,000	$	250,586	$	345,146
Foreign		2,581		3,740		2,949

Income before income taxes	$	150,581	$	254,326	$	348,095

Temporary differences and carryforwards which gave rise to deferred tax assets and liabilities consisted of the following (in thousands):


	Dec. 27, 2025		Dec. 28, 2024
Deferred tax assets:
Receivable valuations	$	9,356	$	7,899
Share-based payments		1,212		1,139
Self-insured claims		8,006		4,659
Other		14,445		11,411

Total deferred tax assets	$	33,019	$	25,108

Deferred tax liabilities:
Operating property	$	44,263	$	35,131
Goodwill		4,942		4,366
Other		4,723		3,213

Total deferred tax liabilities	$	53,928	$	42,710

Net deferred tax liability	$	20,909	$	17,602

The following table summarizes the differences between income taxes calculated at the federal income tax rate of 21% on income before income taxes and the provisions for income taxes (in thousands):


	Fiscal Year 2025						Fiscal Year 2024						Fiscal Year 2023
	Amount			Percent			Amount			Percent			Amount			Percent
U.S federal statutory income tax rate	$	31,622			21.0	%	$	53,409			21.0	%	$	73,100			21.0	%
State and local income taxes, net of federal income tax effect (1)		4,128			2.7	%		5,596			2.2	%		9,703			2.8	%
Foreign tax effects		487			0.3	%		214			0.1	%		659			0.2	%
Effect of cross-border tax laws		(50	)		0.0	%		(59	)		0.0	%		(69	)		0.0	%
Tax credits		(749	)		(0.5	%)		(2,591	)		(1.0	%)		(1,672	)		(0.5	%)
Non-taxable and non-deductible items		1,468			1.0	%		913			0.3	%		518			0.1	%
Changes in unrecognized tax benefits		(1,443	)		(1.0	)%		929			0.4	%		1,421			0.4	%
Other adjustments, net		111			0.1	%		(31	)		0.0	%		41			0.0	%

Effective tax rate	$	35,574			23.6	%	$	58,380			23.0	%	$	83,701			24.0	%

(1)	State taxes in Florida, Illinois, California and Texas make up the majority (greater than 50 percent) of the tax effect in this category.

The Company files a consolidated U.S. federal income tax return. The Company or its subsidiaries file state tax returns in the majority of the U.S. state tax jurisdictions. With few exceptions, the Company and its subsidiaries are no longer subject to U.S. federal or state income tax examinations by tax authorities for 2021 and prior years. The Company’s wholly-owned Canadian subsidiary, Landstar Canada, Inc., is subject to Canadian income and other taxes. The Company’s wholly-owned Mexican subsidiaries, Landstar Holdings, S. de R.L.C.V. and Landstar Metro, S.A.P.I. de C.V., are subject to Mexican income and other taxes. The Company’s Canadian and Mexican subsidiaries also may each be subject to U.S. income and other taxes.

As of December 27, 2025 and December 28, 2024, the Company had $3,953,000 and $5,396,000, respectively, of net unrecognized tax benefits representing the provision for the uncertainty of certain tax positions plus a component of interest and penalties. Estimated interest and penalties on the provision for the uncertainty of certain tax positions is included in income tax expense. At December 27, 2025 and December 28, 2024, there was $1,345,000 and $1,793,000, respectively, accrued for estimated interest and penalties related to the uncertainty of certain tax positions. The Company does not currently anticipate any significant increase or decrease to the unrecognized tax benefit during fiscal year 2026.

The following table summarizes the rollforward of the total amounts of gross unrecognized tax benefits for fiscal years 2025 and 2024 (in thousands):


	Fiscal Years
	2025			2024
Gross unrecognized tax benefits – beginning of the year	$	6,571		$	5,454
Gross increases related to current year tax positions		430			598
Gross increases related to prior year tax positions		444			1,344
Lapse of statute of limitations		(2,625	)		(825	)

Gross unrecognized tax benefits – end of the year	$	4,820		$	6,571

Landstar paid income taxes of $51,451,000 in fiscal year 2025, $47,528,000 in fiscal year 2024 and $92,695,000 in fiscal year 2023, which consisted of the following (in thousands):


	Fiscal Years
	2025		2024		2023
Federal	$	44,000	$	41,000	$	76,000
State		5,807		6,137		14,928
Foreign		1,644		391		1,767

Total income taxes paid, net of refunds	$	51,451	$	47,528	$	92,695

- Definition

The entire disclosure for income tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477617/942-740-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478822/944-740-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12C

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12B

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 270
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477891/740-270-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.5.Q1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/740/tableOfContent

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-14

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-21

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-17

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-2

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482603/740-30-50-2

+ Details

Schedule Of Revenue By Major Customers By Reporting Segments (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 27, 2025

Dec. 28, 2024

Dec. 30, 2023

Disaggregation of Revenue [Line Items]

Revenue

$ 4,743,760

$ 4,819,245

$ 5,303,322

BCO Independent Contractors – Truck

Disaggregation of Revenue [Line Items]

Percentage of Consolidated Revenue

38.00%

Brokerage Carriers - Truck

Disaggregation of Revenue [Line Items]

Percentage of Consolidated Revenue

53.00%

52.00%

53.00%

Rail Intermodal

Disaggregation of Revenue [Line Items]

Percentage of Consolidated Revenue

2.00%

Ocean and air cargo carriers

Disaggregation of Revenue [Line Items]

Percentage of Consolidated Revenue

5.00%

6.00%

5.00%

BCO Independent Contractor Truck and Brokerage Carriers Truck | Van Equipment

Disaggregation of Revenue [Line Items]

Revenue

$ 2,328,386

$ 2,447,810

$ 2,742,281

BCO Independent Contractor Truck and Brokerage Carriers Truck | Unsided/Platform Equipment

Disaggregation of Revenue [Line Items]

Revenue

1,527,802

1,455,663

1,490,393

BCO Independent Contractor Truck and Brokerage Carriers Truck | Less than Truckload

Disaggregation of Revenue [Line Items]

Revenue

95,856

99,828

117,683

BCO Independent Contractor Truck and Brokerage Carriers Truck | Other Truck Transportation

Disaggregation of Revenue [Line Items]

Revenue

^[1]

$ 383,970

$ 343,253

$ 479,173

[1]

Held for Sale Subsidiary - Disclosure of Long Lived Assets and Liabilities Held for Sale (Detail) - USD ($)
$ in Thousands

Dec. 27, 2025

Dec. 28, 2024

Assets held for sale:

Total assets held for sale

$ 12,231

$ 0

Liabilities held for sale:

Total liabilities held for sale

6,961

Cumulative translation loss of foreign entities held for sale

(5,712)

$ (12,010)

Landstar Metro [Member]

Assets held for sale:

Cash and cash equivalents

179

Trade and other receivables

8,712

Operating property

7,981

Other assets

6,037

Total assets held for sale

^[1]

12,231

Less: valuation allowance

(10,678)

Liabilities held for sale:

Accounts payable

2,640

Deferred income taxes and other liabilities

4,321

Total liabilities held for sale

^[1]

6,961

Cumulative translation loss of foreign entities held for sale

^[2]

$ 1,205

[1]	Assets and liabilities held for sale are separately presented on the consolidated balance sheets.
[2]	Cumulative translation loss of foreign entities held for sale is included within accumulated other comprehensive loss on the consolidated balance sheets.

Debt	12 Months Ended
Debt	Dec. 27, 2025
Debt Disclosure [Abstract]
Debt	(7) Debt Other than the finance lease obligations as presented on the consolidated balance sheets, the Company had no outstanding debt as of December 27, 2025 and December 28, 2024. On July 1, 2022, Landstar entered into a second amended and restated credit agreement with a bank syndicate led by JPMorgan Chase Bank, N.A., as administrative agent (as further amended as of June 21, 2024, the “Credit Agreement”). The Credit Agreement, which matures July 1, 2027, provides for borrowing capacity in the form of a revolving credit facility of $300,000,000, $45,000,000 of which may be utilized in the form of letters of credit. The Credit Agreement also includes an “accordion” feature providing for a possible increase of up to an aggregate amount of borrowing capacity of $600,000,000. As of December 27, 2025, the Company had no borrowings outstanding under the Credit Agreement. The revolving credit loans under the Credit Agreement, at the option of Landstar, bear interest at (i) a forward-looking term rate based on the secured overnight financing rate plus 0.10% and an applicable margin ranging from 1.25% to 2.00%, or (ii) an alternate base rate plus an applicable margin ranging from 0.25% to 1.00%, in each case with the applicable margin determined based upon the Company’s Leverage Ratio, as defined in the Credit Agreement, at the end of the most recent applicable fiscal quarter for which financial statements have been delivered. The revolving credit facility bears a commitment fee, payable quarterly in arrears, of 0.20% to 0.30%, based on the Company’s Leverage Ratio at the end of the most recent applicable fiscal quarter for which financial statements have been delivered. The Credit Agreement contains a number of covenants that limit, among other things, the incurrence of additional indebtedness. The Company is required to, among other things, maintain a minimum fixed charge coverage ratio, as described in the Credit Agreement, and maintain a Leverage Ratio, as defined in the Credit Agreement, below a specified maximum. The Credit Agreement provides for a restriction on cash dividends and other distributions to stockholders on the Company’s capital stock to the extent there is a default under the Credit Agreement. In addition, the Credit Agreement under certain circumstances limits the amount of such cash dividends and other distributions to stockholders to the extent that, after giving effect to any payment made to effect such cash dividend or other distribution, the Leverage Ratio would exceed 2.5 to 1 on a pro forma basis as of the end of the Company’s most recently completed fiscal quarter. The Credit Agreement provides for an event of default in the event that, among other things, a person or group acquires 35% or more of the outstanding capital stock of the Company or obtains power to elect a majority of the Company’s directors or the directors cease to consist of a majority of Continuing Directors, as defined in the Credit Agreement. None of these covenants are presently considered by management to be materially restrictive to the Company’s operations, capital resources or liquidity. The Company is currently in compliance with all of the debt covenants under the Credit Agreement. The interest rates on borrowings under the revolving credit facility are typically tied to short-term interest rates and, as such, carrying value approximates fair value. Interest rates on borrowings under finance leases approximate the interest rates that would currently be available to the Company under similar terms and, as such, carrying value approximates fair value. Landstar paid interest of $5,326,000 in fiscal year 2025, $3,813,000 in fiscal year 2024 and $3,604,000 in fiscal year 2023.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 470
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/470/tableOfContent

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
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-Paragraph 2
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Segment Information

12 Months Ended

Dec. 27, 2025

Segment Reporting [Abstract]

Segment Information

(12) Segment Information

Landstar markets its integrated transportation management solutions primarily through independent commission sales agents and exclusively utilizes third party capacity providers to transport customers’ freight. Landstar’s independent commission sales agents enter into contractual arrangements with the Company and are responsible for locating freight, making that freight available to Landstar’s capacity providers and coordinating the transportation of the freight with customers and capacity providers. The Company’s third party capacity providers consist of BCO Independent Contractors, unrelated trucking companies who provide truck capacity to the Company under

non-exclusive

contractual arrangements (the “Truck Brokerage Carriers”), air cargo carriers, ocean cargo carriers and railroads. Through this network of agents and capacity providers linked together by Landstar’s ecosystem of digital technologies, Landstar operates an integrated transportation management solutions business primarily throughout North America with revenue of $4.7 billion during the most recently completed fiscal year. The Company reports the results of two operating segments: the transportation logistics segment and the insurance segment.

The transportation logistics segment provides a wide range of integrated transportation management solutions. Transportation services offered by the Company include truckload, less-than-truckload and other truck transportation, rail intermodal, air cargo, ocean cargo, expedited ground and air delivery of time-critical freight, heavy-haul/specialized, hazardous materials

(“haz-mat”),

cold chain/temperature-controlled, U.S.-Canada and U.S.-Mexico cross-border, intra-Mexico, intra-Canada, project cargo and customs brokerage. Examples of the industries serviced by the transportation logistics segment include automotive parts and assemblies, consumer durables, building products, metals, chemicals, foodstuffs, heavy machinery, retail, electronics, military equipment and general commodities. In addition, the transportation logistics segment provides transportation services to other transportation companies, including third party logistics and less-than-truckload service providers. The independent commission sales agents market services provided by the transportation logistics segment. Billings for freight transportation services are typically charged to customers on a per shipment basis for the physical transportation of freight and are referred to as transportation revenue. The results of operations from Landstar Blue and Landstar Metro are presented as part of the Company’s transportation logistics segment.

The insurance segment is comprised of Signature Insurance Company (“Signature”), a wholly owned offshore insurance subsidiary, and Risk Management Claim Services, Inc. The insurance segment provides risk and claims management services to certain of Landstar’s operating subsidiaries. In addition, it reinsures certain risks of the Company’s BCO Independent Contractors and provides certain property and casualty insurance and reinsurance directly to certain of Landstar’s operating subsidiaries. Revenue at the insurance segment represents reinsurance premiums from third party insurance companies that provide insurance programs to BCO Independent Contractors where all or a portion of the risk is ultimately borne by Signature. Internal revenue for premiums billed by the insurance segment to the transportation logistics segment is calculated each fiscal period based primarily on an actuarial calculation of historical loss experience and is believed to approximate the cost that would have been incurred by the transportation logistics segment had similar insurance been obtained from an unrelated third party.

The accounting policies of the segments are the same as those described in the summary of significant accounting policies. The Company’s chief operating decision maker (“CODM”) is our Chief Executive Officer. The CODM evaluates each segment’s performance and makes decisions about resource allocations primarily based on operating income, which is the principal financial metric utilized to monitor budgeted versus actual results by segment of the Company. Asset information by segment is not regularly provided to the CODM for purposes of evaluating performance or allocating resources, and therefore such information has not been presented.

No single customer accounted for more than 10% of the Company’s consolidated revenue in fiscal years 2025, 2024 and 2023. Substantially all of the Company’s revenue is generated in North America, primarily through customers located in the United States.


	Transportation
	Logistics		Insurance		Total
2025
External revenue	$	4,685,115	$	58,645	$	4,743,760
Internal revenue		—		57,694		57,694

Total revenue		4,685,115		116,339		4,801,454

Investment income				13,685		13,685
Purchased transportation		3,688,343				3,688,343
Commissions to agents		387,397				387,397
Other operating costs, net of gains on asset sales/dispositions		61,586				61,586
Insurance and claims		102,336		114,794		217,130
Selling, general and administrative		219,006		11,542		230,548
Depreciation and amortization		46,388				46,388
Impairment of intangible and other assets (1)		32,170				32,170

Operating income		147,889		3,688		151,577

Goodwill		34,005				34,005


	Transportation
	Logistics		Insurance		Total
2024
External revenue	$	4,756,008	$	63,237	$	4,819,245
Internal revenue		—		57,476		57,476

Total revenue		4,756,008		120,713		4,876,721

Investment income				14,810		14,810
Purchased transportation		3,745,241				3,745,241
Commissions to agents		392,751				392,751
Other operating costs, net of gains on asset sales/dispositions		58,781				58,781
Insurance and claims		92,712		78,693		171,405
Selling, general and administrative		204,089		13,619		217,708
Depreciation and amortization		56,738				56,738

Operating income		205,696		43,211		248,907

Goodwill		40,933				40,933


	Transportation
	Logistics		Insurance		Total
2023
External revenue	$	5,230,846	$	72,476	$	5,303,322
Internal revenue		—		67,977		67,977

Total revenue		5,230,846		140,453		5,371,299

Investment income				10,141		10,141
Purchased transportation		4,068,262				4,068,262
Commissions to agents		462,668				462,668
Other operating costs, net of gains on asset sales/dispositions		54,191				54,191
Insurance and claims		101,179		81,039		182,218
Selling, general and administrative		197,819		13,980		211,799
Depreciation and amortization		58,153				58,153

Operating income		288,574		55,575		344,149

Goodwill		42,275				42,275

(1)	Included in the $32,170,000 impairment of intangible and other assets was a goodwill impairment of $7,530,000 within the transportation logistics segment.


	Fiscal Years Ended
	December 27, 2025			December 28, 2024			December 30, 2023
Total revenue	$	4,801,454		$	4,876,721		$	5,371,299
Elimination of internal revenue		(57,694	)		(57,476	)		(67,977	)

Total consolidated revenue		4,743,760			4,819,245			5,303,322
Operating income	$	151,577		$	248,907		$	344,149
Interest and debt expense (income) ( 2 )		996			(5,419	)		(3,946	)

Income before income taxes		150,581			254,326			348,095

(2)

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 21
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+ Details

Held for Sale Subsidiary

12 Months Ended

Dec. 27, 2025

Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]

Held for Sale Subsidiary

(14) Held for Sale Subsidiary

During the 2025 fiscal year, the Company entered into an arrangement with a financial advisor to actively market its Mexican subsidiary, Landstar Metro, S.A.P.I. de C.V. (“Landstar Metro”) and to consider other strategic alternatives for this subsidiary, which may involve a sale or other disposition in whole or in part of Landstar Metro during the Company’s 2026 fiscal year. The Company determined that this planned divestiture does not represent a strategic shift that would be expected to have a significant effect on our consolidated results of operations, and therefore the results of Landstar Metro are not reported as discontinued operations. It is not anticipated that a sale or other disposition of Landstar Metro will adversely affect the Company’s ability to provide U.S.-Mexico cross-border services, given that Landstar Metro is principally engaged in intra-Mexico truck transportation services.

In connection with the decision to actively market Landstar Metro, management identified a triggering event to perform a quantitative goodwill impairment test. Based on the quantitative assessment, the Company concluded that Landstar Metro’s goodwill was impaired and recorded a

non-cash

impairment charge of $7,530,000 to goodwill within the transportation logistics segment. Further, based on the expected fair value of Landstar Metro, net of costs to sell, the Company recognized an impairment on assets held for sale of $10,678,000. Both impairments are included in impairment of intangible and other assets within the Company’s consolidated statements of income. No assurances can be provided that there will not be additional charges and expenses incurred by the Company in connection with this sale process or upon any ultimate disposition of Landstar Metro.


	As of December 27, 2025
Assets held for sale:
Cash and cash equivalents	$	179
Trade and other receivables		8,712
Operating property		7,981
Other assets		6,037
Less: valuation allowance		(10,678	)

Total assets held for sale (1)	$	12,231

Liabilities held for sale:
Accounts payable	$	2,640
Deferred income taxes and other liabilities		4,321

Total liabilities held for sale (1)	$	6,961

Cumulative translation loss of foreign entities held for sale (2)	$	1,205

(1)	Assets and liabilities held for sale are separately presented on the consolidated balance sheets.

(2)	Cumulative translation loss of foreign entities held for sale is included within accumulated other comprehensive loss on the consolidated balance sheets.

Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Income Tax Disclosure [Line Items]
Federal, Current	$ 28,799	$ 54,621	$ 76,827
State, Current	3,099	9,750	13,305
Foreign, Current	1,029	999	1,278
Total current	32,927	65,370	91,410
Federal, Deferred	2,272	(5,441)	(8,410)
State, Deferred	375	(1,549)	701
Total deferred	2,647	(6,990)	(7,709)
Federal	31,071	49,180	68,417
State	3,474	8,201	14,006
Foreign	1,029	999	1,278
Total income taxes	$ 35,574	$ 58,380	$ 83,701

Share-Based Payment Arrangements - Additional Information (Detail) - USD ($)			12 Months Ended
	Jan. 31, 2025	Feb. 02, 2024	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax deficiencies (excess tax benefits) from stock-based awards			$ 106,000	$ (1,122,000)	$ (2,830,000)
Stock awards granted, shares	6,050	58,268
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number					0	1,900
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number					0	1,900
February 2023 Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target available for common share issuance					100.00%
February 2024 Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target available for common share issuance				100.00%
January 2025 Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target available for common share issuance			100.00%
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount rate on stock awards			7.00%
Percentage of target available for common share issuance			100.00%
Stock awards granted, shares			54,402	102,997	41,638
Recognized share-based compensation expense			$ 1,102,000	$ (800,000)	$ 581,000
Unrecognized compensation cost, other than options			$ 51,200,000
Unrecognized compensation cost expected to be recognized over period, years			2 years 9 months 18 days
Non Vested Restricted Stock and Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted, shares			31,439	31,525	22,714
Unrecognized compensation cost, other than options			$ 4,549,000
Unrecognized compensation cost expected to be recognized over period, years			1 year 7 months 6 days
Terms of award			the Company’s Common Stock on the date of grant. Shares of non-vested restricted stock are generally subject to vesting in three equal annual installments either on the first, second and third anniversary of the date of grant or the third, fourth and fifth anniversary of the date of the grant, in two equal annual installments on the first and second anniversary of the date of the grant or 100% on the first, third or fifth anniversary of the date of the grant. For restricted stock awards granted under the 2022 DSCP, each recipient may elect to defer receipt of shares and instead receive restricted stock units (“Deferred Stock Units”), which represent contingent rights to receive shares of the Company’s Common Stock on the date of recipient separation
Directors Stock Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
FMV of restricted shares granted to Directors upon election			$ 150,000	$ 150,000	$ 150,000
Restricted shares granted			8,591	5,810	5,957
Compensation cost on restricted Shares Units granted			$ 1,062,000	$ 1,053,000	$ 1,050,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of stock options exercised during periods					$ 218,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number			0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number			0
Maximum \| Restricted Stock Units (RSUs) \| February 2023 Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of target available for common share issuance					200.00%
Maximum \| Restricted Stock Units (RSUs) \| February 2024 Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of target available for common share issuance				200.00%
Maximum \| Restricted Stock Units (RSUs) \| January 2025 Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of target available for common share issuance			200.00%
2011 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance			6,000,000
Common stock reserved for issuance			2,681,782
2022 Directors Stock Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance			200,000
Common stock reserved for issuance			172,859
2022 Directors Stock Compensation Plan \| Deferred Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting percentage			100.00%

Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Parenthetical) (Detail)	Dec. 27, 2025
Maximum [Member]
Leases [Line Items]
Finance lease Interest rate percentage	6.40%
Minimum [Member]
Leases [Line Items]
Finance lease Interest rate percentage	1.60%

Summary of Information Regarding Stock Options (Detail)	12 Months Ended
Summary of Information Regarding Stock Options (Detail)	Dec. 30, 2023 $ / shares shares
Number of Options
Beginning Balance, number of options	1,900
Exercised, number of options	(1,900)
Ending Balance, number of options	0
Weighted Average Exercise Price per Share
Beginning Balance, Weighted Average Exercise Price per Share \| $ / shares	$ 56.4
Exercised, Weighted Average Exercise Price per Share \| $ / shares	$ 56.4
Options Exercisable, Number of Options
Options exercisable at the beginning, Number of Options	1,900
Options exercisable at the ending, Number of Options	0
Options Exercisable, Weighted Average Exercise Price per Share
Options exercisable at the beginning, Weighted Average Exercise Price per Share \| $ / shares	$ 56.4

Debt - Additional Information (Detail) - USD ($)		12 Months Ended
Debt - Additional Information (Detail) - USD ($)	Jul. 01, 2022	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Debt Instrument [Line Items]
Debt Outstanding Excluding Capital Lease Obligations		$ 0	$ 0
Interest paid		5,326,000	$ 3,813,000	$ 3,604,000
Revolving Credit Facility
Debt Instrument [Line Items]
Debt Outstanding Excluding Capital Lease Obligations		$ 0
Credit facility, initiation date	Jul. 01, 2022
Credit facility, borrowing capacity	$ 45,000,000
Credit facility, maximum borrowing capacity	$ 600,000,000
Credit facility, debt covenants compliance		The Company is currently in compliance with all of the debt covenants under the Credit Agreement.
Additional overnight secured financing rate	0.10%
Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Credit facility, unused credit commitment fee		0.20%
Credit facility event of default, minimum percentage that a person or group should acquire outstanding capital stock		35.00%
Revolving Credit Facility \| Minimum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate		1.25%
Revolving Credit Facility \| Minimum \| Base Rate [Member]
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate		0.25%
Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Credit facility, borrowing capacity	$ 300,000,000
Credit facility, unused credit commitment fee		0.30%
Maximum Leverage ratio beyond which amount of cash dividends and other distributions to stockholders is limited		250.00%
Revolving Credit Facility \| Maximum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate		2.00%
Revolving Credit Facility \| Maximum \| Base Rate [Member]
Debt Instrument [Line Items]
Borrowings, basis spread on variable rate		1.00%

Share-Based Payment Arrangements (Tables)

12 Months Ended

Dec. 27, 2025

Share Based Payment Arrangements [Line Items]

Amounts Recognized in Financial Statements with Respect to Plans

Amounts recognized in the financial statements with respect to these Plans are as follows (in thousands):


	Fiscal Years
	2025			2024			2023
Total cost of the Plans during the period	$	5,998		$	3,435		$	4,282
Amount of related income tax benefit recognized during the period		(1,364	)		(1,963	)		(3,622	)

Net cost of the Plans during the period	$	4,634		$	1,472		$	660

Schedule of Information on Restricted Stock Units

The following table summarizes information regarding the Company’s outstanding restricted stock unit (“RSU”) awards with either a performance condition or a market condition under the Plans:


	Number of RSUs			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2022		151,780		$	115.80
Granted		41,638		$	164.91
Shares earned in excess of target (1)		79,176		$	98.39
Vested shares, including shares earned in excess of target		(137,861	)	$	97.97
Forfeited		(2,011	)	$	142.67

Outstanding at December 30, 2023		132,722		$	138.93
Granted		102,997		$	138.85
Shares earned in excess of target (2)		1,791		$	51.42
Vested shares, including shares earned in excess of target		(45,057	)	$	115.69
Forfeited		(29,801	)	$	140.20

Outstanding at December 28, 2024		162,652		$	144.12
Granted		54,402		$	147.09
Forfeited		(13,342	)	$	158.95

Outstanding at December 27, 2025		203,712		$	143.95

(1)

(2)	Represents additional shares earned under the April 24, 2018 and July 1, 2019 RSU awards as total shareholder return during the applicable performance period exceeded target performance level under each of those awards.

Schedule of Information on Non-Vested Restricted Stock and Deferred Stock Units

The following table summarizes information regarding the Company’s outstanding shares of

non-vested

restricted stock and Deferred Stock Units (defined below) under the Plans:


	Number of Shares and Deferred Stock Units			Weighted Average Grant Date Fair Value
Non-vested at December 31, 2022		47,795		$	138.30
Granted		22,714		$	179.32
Vested		(24,161	)	$	138.35

Non-vested at December 30, 2023		46,348		$	158.38
Granted		31,525		$	187.08
Vested		(25,647	)	$	151.16
Forfeited		(4,707	)	$	169.92

Non-vested at December 28, 2024		47,519		$	180.17
Granted		31,439		$	158.29
Vested		(23,950	)	$	176.95
Forfeited		(1,232	)	$	174.25

Non-vested at December 27, 2025		53,776		$	168.95

Summary of Information Regarding Stock Options

The following table summarizes information regarding the Company’s outstanding stock options under the Plans for fiscal year 2023:


	Options Outstanding					Options Exercisable
	Number of Options			Weighted Average Exercise Price per Share		Number of Options		Weighted Average Exercise Price per Share
Options at December 31, 2022		1,900		$	56.40		1,900	$	56.40
Exercised		(1,900	)	$	56.40

Options at December 30, 2023		—					—

Leases - Weighted Average Remaining Lease Term and the Weighted Average Discount Rate for Finance and Operating leases (Detail)	Dec. 27, 2025
Leases [Abstract]
Weighted average remaining lease term (years)	3 years 3 months 18 days
Weighted average discount rate	5.20%
Weighted average remaining lease term (years)	2 years 3 months 18 days
Weighted average discount rate	5.50%

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 27, 2025	Dec. 28, 2024
Current Assets
Cash and cash equivalents	$ 396,694	$ 515,018
Short-term investments	55,531	51,619
Trade accounts receivable, less allowance of $12,490 and $12,904	670,137	683,841
Other receivables, including advances to independent contractors, less allowance of $18,759 and $17,812	52,784	47,160
Assets held for sale	12,231	0
Other current assets	28,949	22,229
Total current assets	1,216,326	1,319,867
Operating property, less accumulated depreciation and amortization of $473,642 and $456,547	261,322	311,345
Goodwill	34,005	40,933
Other assets	124,282	141,166
Total assets	1,635,935	1,813,311
Current Liabilities
Cash overdraft	56,654	61,033
Accounts payable	369,567	383,625
Current maturities of long-term debt	28,342	33,116
Insurance claims	87,343	40,511
Dividends payable	68,117	70,632
Liabilities held for sale	6,961	0
Other current liabilities	78,856	84,237
Total current liabilities	695,840	673,154
Long-term debt, excluding current maturities	48,480	69,191
Insurance claims	62,706	62,842
Deferred income taxes and other noncurrent liabilities	33,244	35,685
Shareholders' Equity
Common stock, $0.01 par value, authorized 160,000,000 shares, issued 68,590,708 and 68,559,269 shares	686	686
Additional paid-in capital	261,256	255,260
Retained earnings	2,852,680	2,859,916
Cost of 34,531,982 and 33,243,196 shares of common stock in treasury	(2,313,245)	(2,131,413)
Accumulated other comprehensive loss	(5,712)	(12,010)
Total shareholders' equity	795,665	972,439
Total liabilities and shareholders' equity	$ 1,635,935	$ 1,813,311

Recent Accounting Pronouncements	12 Months Ended
Recent Accounting Pronouncements	Dec. 27, 2025
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	(17) Recent Accounting Pronouncements Adoption of New Accounting Standards In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures (“ASU 2023-09”), which expands disclosures in an entity’s income tax rate reconciliation table and regarding cash taxes paid both in the U.S. and foreign jurisdictions. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. The Company adopted ASU 2023-09 on December 27, 2025 retrospectively to all prior periods presented in the consolidated financial statements. Accounting Standards Issued But Not Yet Adopted In November 2024, the FASB issued ASU 2024-03, Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses (“ASU 2024-03”), which expands disclosures about certain categories of expenses. ASU 2024-03 is effective for annual periods beginning after December 15, 2026. The Company is currently evaluating the impact of ASU 2024-03 on its consolidated financial statements and disclosures.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476173/280-10-65-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-7

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 848
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483550/848-10-65-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 848
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483550/848-10-65-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 848
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483550/848-10-65-1

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 5
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-URI https://asc.fasb.org/1943274/2147480530/250-10-S99-5

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 65
-Paragraph 6
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-URI https://asc.fasb.org/1943274/2147480528/815-20-65-6

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
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Reference 23: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
-Name Accounting Standards Codification
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Reference 24: http://www.xbrl.org/2003/role/disclosureRef
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Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480530/250-10-S99-6

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481538/470-20-65-4

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481538/470-20-65-4

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 250
-Publisher FASB
-URI https://asc.fasb.org/250/tableOfContent

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

+ Details

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 115,007	$ 195,946	$ 264,394

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Information Regarding Reportable Business Segments (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 27, 2025

Dec. 28, 2024

Dec. 30, 2023

Segment Reporting Information [Line Items]

Revenue

$ 4,743,760

$ 4,819,245

$ 5,303,322

Gross revenue

4,801,454

4,876,721

5,371,299

Elimination of internal revenue

(57,694)

(57,476)

(67,977)

Total consolidated revenue

4,743,760

4,819,245

5,303,322

Investment income

13,685

14,810

10,141

Purchased transportation

3,688,343

3,745,241

4,068,262

Commissions to agents

387,397

392,751

462,668

Other operating costs, net of gains on asset sales/dispositions

61,586

58,781

54,191

Insurance and claims

217,130

171,405

182,218

Selling, general and administrative

230,548

217,708

211,799

Impairment of intangible and other assets

32,170

^[1]

Depreciation and amortization

46,388

56,738

58,153

Operating income

151,577

248,907

344,149

Interest and debt expense (income)

^[2]

996

(5,419)

(3,946)

Income before income taxes

150,581

254,326

348,095

Goodwill

34,005

40,933

42,275

Related Party [Member]

Segment Reporting Information [Line Items]

Revenue

57,694

57,476

67,977

Total consolidated revenue

57,694

57,476

67,977

Transportation Logistics

Segment Reporting Information [Line Items]

Revenue

4,685,115

4,756,008

5,230,846

Gross revenue

4,685,115

4,756,008

5,230,846

Total consolidated revenue

4,685,115

4,756,008

5,230,846

Purchased transportation

3,688,343

3,745,241

4,068,262

Commissions to agents

387,397

392,751

462,668

Other operating costs, net of gains on asset sales/dispositions

61,586

58,781

54,191

Insurance and claims

102,336

92,712

101,179

Selling, general and administrative

219,006

204,089

197,819

Impairment of intangible and other assets

^[1]

32,170

Depreciation and amortization

46,388

56,738

58,153

Operating income

147,889

205,696

288,574

Goodwill

34,005

40,933

42,275

Insurance

Segment Reporting Information [Line Items]

Revenue

58,645

63,237

72,476

Gross revenue

116,339

120,713

140,453

Total consolidated revenue

58,645

63,237

72,476

Investment income

13,685

14,810

10,141

Insurance and claims

114,794

78,693

81,039

Selling, general and administrative

11,542

13,619

13,980

Operating income

3,688

43,211

55,575

Insurance | Related Party [Member]

Segment Reporting Information [Line Items]

Revenue

57,694

57,476

67,977

Total consolidated revenue

$ 57,694

$ 57,476

$ 67,977

[1]	Included in the $32,170,000 impairment of intangible and other assets was a goodwill impairment of $7,530,000 within the transportation logistics segment.
[2]	Interest and debt expense (income) includes (1) interest income earned on cash balances held by the transportation logistics segment of $4,590, $9,495 and $7,811 in 2025, 2024 and 2023, respectively and (2) consolidated total interest expense of $5,586, $4,076 and $3,865 in 2025, 2024 and 2023, respectively.

Leases

12 Months Ended

Dec. 27, 2025

Leases [Abstract]

Leases

(8) Leases

Landstar’s noncancelable leases are primarily comprised of finance leases for the acquisition of new trailing equipment. Each finance lease for the acquisition of trailing equipment is a five year lease with a $1 purchase option for the applicable equipment at lease expiration. Substantially all of Landstar’s operating lease

right-of-use

assets and operating lease liabilities represent leases for facilities maintained in support of the Company’s network of BCO Independent Contractors and office space used to conduct Landstar’s business. These leases do not have significant rent escalation holidays, concessions, leasehold improvement incentives or other

build-out

clauses. Further, the leases do not contain contingent rent provisions. Landstar also rents certain trailing equipment to supplement the Company-owned trailer fleet under

“month-to-month”

lease terms, which are not required to be recorded on the balance sheet due to the less than twelve month lease term exemption. Sublease income is primarily comprised of weekly trailing equipment rentals to BCO Independent Contractors.

Most of Landstar’s operating leases include one or more options to renew. The exercise of lease renewal options is typically at Landstar’s sole discretion, and, as such, the majority of renewals to extend the lease terms are not included in the

right-of-use

assets and lease liabilities as they are not reasonably certain of exercise. Landstar regularly evaluates the renewal options, and when they are reasonably certain of exercise, Landstar includes the renewal period in the lease term.

As most of Landstar’s operating leases do not provide an implicit rate, Landstar utilized its incremental borrowing rate based on the infor

matio

n available at the lease commencement date in determining the present value of the lease payments. Landstar has a centrally managed treasury function; therefore, based on the applicable lease terms and the current economic environment, the Company applies a portfolio approach for determining t

incremental borrowing rate.

The components of lease cost for finance leases and operating leases for the fiscal year ended December 27, 2025 were (in thousands):


Finance leases:
Amortization of right-of-use assets	$	18,276
Interest on lease liability		4,305

Total finance lease cost		22,581
Operating leases:
Lease cost		5,079
Variable lease cost		—
Sublease income		(6,219	)

Total net operating lease income		(1,140	)

Total net lease cost	$	21,441

Total net operating lease income, net of rent expense under operating leases, was $1,769,000 and $1,853,000 in fiscal years 2024 and 2023, respectively.

A summary of the lease classification on the Company’s consolidated balance sheet as of December 27, 2025 is as follows (in thousands):

Assets:



Operating lease right-of-use assets	Other assets	$	615
Finance lease assets	Operating property, less accumulated depreciation and amortization		108,385

Total lease assets		$	109,000

Liabilities:

The following table reconciles the undiscounted cash flows for the finance and operating leases to the finance and operating lease liabilities recorded on the balance sheet at December 27, 2025 (in thousands):


	Finance Leases		Operating Leases
2026	$	31,764	$	298
2027		20,966		264
2028		17,057		94
2029		12,678		—
2030		1,759		—
Thereafter		—		—

Total future minimum lease payments		84,224		656
Less amount representing interest (1.6% to 6.4%)		7,402		41

Present value of minimum lease payments	$	76,822	$	615

Current maturities of long-term debt		28,342
Long-term debt, excluding current maturities		48,480
Other current liabilities				289
Deferred income taxes and other noncurrent liabilities				326

The weighted average remaining lease term and the weighted average discount rate for finance and operating leases as of December 27, 2025 we

re:


	Finance Leases			Operating Leases
Weighted average remaining lease term (years)		3.3			2.3
Weighted average discount rate		5.2	%		5.5	%

Leases (Tables)

12 Months Ended

Dec. 27, 2025

Leases [Abstract]

Lease, Cost [Table Text Block]

The components of lease cost for finance leases and operating leases for the fiscal year ended December 27, 2025 were (in thousands):


Finance leases:
Amortization of right-of-use assets	$	18,276
Interest on lease liability		4,305

Total finance lease cost		22,581
Operating leases:
Lease cost		5,079
Variable lease cost		—
Sublease income		(6,219	)

Total net operating lease income		(1,140	)

Total net lease cost	$	21,441

Schedule Of Supplemental Balance Sheet Information Related To Leases [Table Text Block]

A summary of the lease classification on the Company’s consolidated balance sheet as of December 27, 2025 is as follows (in thousands):

Assets:



Operating lease right-of-use assets	Other assets	$	615
Finance lease assets	Operating property, less accumulated depreciation and amortization		108,385

Total lease assets		$	109,000

Finance And Operating Lease Maturity [Table Text Block]


	Finance Leases		Operating Leases
2026	$	31,764	$	298
2027		20,966		264
2028		17,057		94
2029		12,678		—
2030		1,759		—
Thereafter		—		—

Total future minimum lease payments		84,224		656
Less amount representing interest (1.6% to 6.4%)		7,402		41

Present value of minimum lease payments	$	76,822	$	615

Current maturities of long-term debt		28,342
Long-term debt, excluding current maturities		48,480
Other current liabilities				289
Deferred income taxes and other noncurrent liabilities				326

Schedule Discount Rate And Lease Term Used In Calculating Lease Liabilities And Assets [Table Text Block]

The weighted average remaining lease term and the weighted average discount rate for finance and operating leases as of December 27, 2025 we

re:


	Finance Leases			Operating Leases
Weighted average remaining lease term (years)		3.3			2.3
Weighted average discount rate		5.2	%		5.5	%

Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 27, 2025	Dec. 28, 2024
Income Tax Disclosure [Line Items]
Receivable valuations	$ 9,356	$ 7,899
Share-based payments	1,212	1,139
Self-insured claims	8,006	4,659
Other	14,445	11,411
Total deferred tax assets	33,019	25,108
Operating property	44,263	35,131
Goodwill	4,942	4,366
Other	4,723	3,213
Total deferred tax liabilities	53,928	42,710
Net deferred tax liability	$ 20,909	$ 17,602

Other Comprehensive Income (Tables)

12 Months Ended

Dec. 27, 2025

Other Comprehensive Income (Loss), Net of Tax [Abstract]

Components of and Changes in Accumulated Other Comprehensive Income, Net of Related Income Taxes

The following table presents the components of and changes in accumulated other comprehensive income (loss), net of related income taxes, as of and for the fiscal years ended December 27, 2025, December 28, 2024 and December 30, 2023 (in thousands):


	Unrealized Holding Gains (Losses) on Available-for-Sale Securities			Foreign Currency Translation			Total
Balance as of December 31, 2022	$	(8,449	)	$	(6,575	)	$	(15,024	)
Other comprehensive income		3,439			4,720			8,159

Balance as of December 30, 2023		(5,010	)		(1,855	)		(6,865	)
Other comprehensive income (loss)		2,205			(7,350	)		(5,145	)

Balance as of December 28, 2024		(2,805	)		(9,205	)		(12,010	)
Other comprehensive income		2,409			3,889			6,298

Balance as of December 27, 2025	$	(396	)	$	(5,316	)	$	(5,712	)

Other Comprehensive Income

12 Months Ended

Dec. 27, 2025

Other Comprehensive Income (Loss), Net of Tax [Abstract]

Other Comprehensive Income

(2) Other Comprehensive Income


	Unrealized Holding Gains (Losses) on Available-for-Sale Securities			Foreign Currency Translation			Total
Balance as of December 31, 2022	$	(8,449	)	$	(6,575	)	$	(15,024	)
Other comprehensive income		3,439			4,720			8,159

Balance as of December 30, 2023		(5,010	)		(1,855	)		(6,865	)
Other comprehensive income (loss)		2,205			(7,350	)		(5,145	)

Balance as of December 28, 2024		(2,805	)		(9,205	)		(12,010	)
Other comprehensive income		2,409			3,889			6,298

Balance as of December 27, 2025	$	(396	)	$	(5,316	)	$	(5,712	)

Amounts reclassified from accumulated other comprehensive income to investment income due to the realization of previously unrealized gains and losses in the accompanying consolidated statements of income were not significant for the fiscal years ended December 27, 2025, December 28, 2024 and December 30, 2023.

Leases - Additional Information (Detail) - USD ($)	12 Months Ended
Leases - Additional Information (Detail) - USD ($)	Dec. 28, 2024	Dec. 30, 2023	Dec. 27, 2025
Leases Disclosure [Line Items]
Finance Lease Option to Purchase Option Value			$ 1
Lessee, Finance Lease, Term of Contract			5 years
Sublease rent income, net of rent expense	$ 1,769,000	$ 1,853,000

Other Comprehensive Income - Components of and Changes in Accumulated Other Comprehensive (loss) Income, Net of Related Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 972,439
Other comprehensive income (loss)	6,298	$ (5,145)	$ 8,159
Ending Balance	795,665	972,439
Unrealized Holding Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,805)	(5,010)	(8,449)
Other comprehensive income (loss)	2,409	2,205	3,439
Ending Balance	(396)	(2,805)	(5,010)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(9,205)	(1,855)	(6,575)
Other comprehensive income (loss)	3,889	(7,350)	4,720
Ending Balance	(5,316)	(9,205)	(1,855)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(12,010)	(6,865)	(15,024)
Other comprehensive income (loss)	6,298	(5,145)	8,159
Ending Balance	$ (5,712)	$ (12,010)	$ (6,865)

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

- Definition

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 15: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

Commitments and Contingencies - Additional Information (Detail) - USD ($)			3 Months Ended	12 Months Ended
	Jan. 13, 2026	Aug. 06, 2025	Dec. 27, 2025	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Commitments and Contingencies Disclosure [Line Items]
Insurance and claims				$ 159,436,000	$ 113,929,000	$ 114,241,000
Litigation settlement, amount awarded to other party	$ 22,800,000	$ 22,800,000
Loss contingency, estimate of possible loss		$ 3,420,000
Insurance recoveries				12,000,000
Percentage of contingency	100.00%	15.00%
Revolving Credit Facility
Commitments and Contingencies Disclosure [Line Items]
Letters of credit outstanding			$ 34,916,000	34,916,000
Guarantee Payment of Insurance Claims
Commitments and Contingencies Disclosure [Line Items]
Letters of credit outstanding			75,331,000	75,331,000
Judgment Incremental Pretax Expense
Commitments and Contingencies Disclosure [Line Items]
Insurance and claims			$ 5,700,000	$ 5,700,000

Consolidated Statements of Income - USD ($)
$ in Thousands

12 Months Ended

Dec. 27, 2025

Dec. 28, 2024

Dec. 30, 2023

Revenue

$ 4,743,760

$ 4,819,245

$ 5,303,322

Investment income

13,685

14,810

10,141

Costs and expenses:

Purchased transportation

3,688,343

3,745,241

4,068,262

Commissions to agents

387,397

392,751

462,668

Other operating costs, net of gains on asset sales/dispositions

61,586

58,781

54,191

Insurance and claims

159,436

113,929

114,241

Selling, general and administrative

230,548

217,708

211,799

Depreciation and amortization

46,388

56,738

58,153

Impairment of intangible and other assets

32,170

^[1]

Total costs and expenses

4,605,868

4,585,148

4,969,314

Operating income

151,577

248,907

344,149

Interest and debt expense (income)

^[2]

996

(5,419)

(3,946)

Income before income taxes

150,581

254,326

348,095

Income taxes

35,574

58,380

83,701

Net income

$ 115,007

$ 195,946

$ 264,394

Basic earnings per share

$ 3.31

$ 5.51

$ 7.36

Diluted earnings per share

$ 3.31

$ 5.51

$ 7.36

Average basic shares outstanding

34,717,000

35,538,000

35,920,000

Average diluted shares outstanding

34,717,000

35,538,000

35,920,000

Dividends per common share

$ 3.56

$ 3.38

$ 3.26

[1]	Included in the $32,170,000 impairment of intangible and other assets was a goodwill impairment of $7,530,000 within the transportation logistics segment.
[2]	Interest and debt expense (income) includes (1) interest income earned on cash balances held by the transportation logistics segment of $4,590, $9,495 and $7,811 in 2025, 2024 and 2023, respectively and (2) consolidated total interest expense of $5,586, $4,076 and $3,865 in 2025, 2024 and 2023, respectively.

Impairment of Equity Investment - Additional Information (Detail)	Dec. 27, 2025 USD ($)
Equity Securities without Readily Determinable Fair Value [Line Items]
Equity investment	$ 4,999,000

Leases - Components of Lease Cost for Finance Leases and Operating Leases (Detail) $ in Thousands	12 Months Ended
	Dec. 27, 2025 USD ($)
Finance leases:
Amortization of right-of-use assets	$ 18,276
Interest on lease liability	4,305
Total finance lease cost	22,581
Operating leases:
Lease cost	5,079
Variable lease cost	0
Sublease income	(6,219)
Total net operating lease income	(1,140)
Total net lease cost	$ 21,441

Change in Accounting Estimate for Self-Insured Claims - Effect of Increase in Cost of Insurance and Claims (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Change in Accounting Estimate [Line Items]
Operating income	$ 151,577	$ 248,907	$ 344,149
Net income	$ 115,007	$ 195,946	$ 264,394
Basic earnings per share	$ 3.31	$ 5.51	$ 7.36
Diluted earnings per share	$ 3.31	$ 5.51	$ 7.36
Development of Prior Year Self Insured Claims Estimates
Change in Accounting Estimate [Line Items]
Operating income	$ 32,082	$ 8,824	$ 6,058
Net income	$ 24,511	$ 6,794	$ 4,598
Basic earnings per share	$ 0.71	$ 0.19	$ 0.13
Diluted earnings per share	$ 0.71	$ 0.19	$ 0.13

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
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-Name Accounting Standards Codification
-Section 50
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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

+ Details

Summary of Activity in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 32,388	$ 27,320	$ 24,069
Charged to Costs and Expenses	16,574	18,266	14,032
Write-offs, Net of Recoveries	(11,651)	(13,198)	(10,781)
Balance at End of Period	37,311	32,388	27,320
Trade Receivables
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	12,904	11,738	12,121
Charged to Costs and Expenses	5,835	6,449	5,704
Write-offs, Net of Recoveries	(6,249)	(5,283)	(6,087)
Balance at End of Period	12,490	12,904	11,738
Other Receivables
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	19,276	15,376	11,745
Charged to Costs and Expenses	10,738	11,811	8,325
Write-offs, Net of Recoveries	(5,402)	(7,911)	(4,694)
Balance at End of Period	24,612	19,276	15,376
Other Non-Current Receivables
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	208	206	203
Charged to Costs and Expenses	1	6	3
Write-offs, Net of Recoveries	0	(4)	0
Balance at End of Period	$ 209	$ 208	$ 206

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Change in Accounting Estimate for Self-Insured Claims (Tables)

12 Months Ended

Dec. 27, 2025

Accounting Changes and Error Corrections [Abstract]

Effect of Increase in Cost of Insurance and Claims

The following table summarizes the adverse effect of the increase in the cost of insurance claims resulting from net unfavorable development of prior year self-insured claims estimates on operating income, net income and basic and diluted earnings per share set forth in the consolidated statements of income for the fiscal years ended December 27, 2025, December 28, 2024 and December 30, 2023 (in thousands, except per share amounts):


	Fiscal Years Ended
	December 27, 2025		December 28, 2024		December 30, 2023
Operating income	$	32,082	$	8,824	$	6,058
Net income	$	24,511	$	6,794	$	4,598
Basic and diluted earnings per share	$	0.71	$	0.19	$	0.13

Schedule of Provision for Income Taxes on Income Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Income Tax Disclosure [Line Items]
United States	$ 148,000	$ 250,586	$ 345,146
Foreign	2,581	3,740	2,949
Income before income taxes	$ 150,581	$ 254,326	$ 348,095

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details

Operating Property (Tables)

12 Months Ended

Dec. 27, 2025

Property, Plant and Equipment [Abstract]

Schedule of Operating Property

Operating property is summarized as follows (in thousands):


	Dec. 27, 2025		Dec. 28, 2024
Land	$	17,389	$	17,389
Buildings and improvements		81,045		80,719
Trailing equipment		485,769		518,524
Information technology hardware and software		142,064		141,029
Other equipment		8,697		10,231

Total operating property, gross		734,964		767,892
Less accumulated depreciation and amortization		473,642		456,547

Total operating property, net	$	261,322	$	311,345

Impairment of Equity Investment	12 Months Ended
Impairment of Equity Investment	Dec. 27, 2025
Impairment of Equity Securities Without Readily Determinable Fair Value Annual Amount [Abstract]
Impairment of Equity Investment	(16) Impairment of Equity Investment In 2022, the Company acquired a minority equity investment in Cavnue, LLC (“Cavnue”), a privately held start-up company focused on combining technology and road infrastructure to unlock the full potential of connected and autonomous vehicles. This non-controlling investment in units of Cavnue is considered an investment in non-marketable equity securities without a readily determinable market value. The carrying value of the non-marketable equity securities is adjusted to fair value upon observable transactions for identical or similar investments of the same issuer or impairment (referred to as the measurement alternative). During the 2025 fiscal year, the Company determined that there were indicators of potential impairment related to the value of its equity investment in Cavnue related to the financial performance of the company and its ability to raise additional capital to finance continued investment in its operations. As such, the Company recorded a impairment charge for the carrying value of its investment in Cavnue of $ 4,999,000 during the fiscal year ended December 27, 2025, which is included in impairment of intangible and other assets within the Company’s consolidated statements of income. The Company subsequently fully divested itself of its interests in Cavnue in January 2026.

Held for Sale Subsidiary - Additional Information (Detail) - Landstar Metro [Member]	12 Months Ended
	Dec. 27, 2025 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill, Impairment Loss	$ 7,530,000
Impairment of Long-Lived Assets to be Disposed of	$ 10,678,000

- Definition

+ References + Details

Change in Accounting Estimate for Self-Insured Claims - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 27, 2025	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Change in Accounting Estimate [Line Items]
Insurance and claims		$ 159,436	$ 113,929	$ 114,241
Judgment Incremental Pretax Expense
Change in Accounting Estimate [Line Items]
Insurance and claims	$ 5,700	$ 5,700

Leases - Classification on our Consolidated Balance Sheet (Detail) $ in Thousands	Dec. 27, 2025 USD ($)
Leases [Line Items]
Operating lease right-of-use assets	$ 615
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent
Finance lease assets	$ 108,385
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net
Total lease assets	$ 109,000

Change in Accounting Estimate for Self-Insured Claims

12 Months Ended

Dec. 27, 2025

Accounting Changes and Error Corrections [Abstract]

Change in Accounting Estimate for Self-Insured Claims

(13) Change in Accounting Estimate for Self-Insured Claims

Landstar provides for the estimated costs of self-insured claims primarily on an actuarial basis. The amount recorded for the estimated liability for claims incurred is based upon the facts and circumstances known on the applicable balance sheet date. The ultimate resolution of these claims may be for an amount greater or less than the amount estimated by management. The Company continually revises its existing claim estimates as new or revised information becomes available on the status of each claim. Historically, the Company has experienced both favorable and unfavorable development of prior years’ claims estimates within its various programs.


	Fiscal Years Ended
	December 27, 2025		December 28, 2024		December 30, 2023
Operating income	$	32,082	$	8,824	$	6,058
Net income	$	24,511	$	6,794	$	4,598
Basic and diluted earnings per share	$	0.71	$	0.19	$	0.13

The unfavorable development of prior years’ claims during the fiscal year ended December 27, 2025 was primarily attributable to several specific commercial trucking claims, including approximately $5.7 million related to the Judgment in the Cabral Matter, and elevated cargo loss experience as a result of fraud and theft in the supply chain. The unfavorable development of prior years’ claims in the fiscal years ended December 28, 2024 and December 30, 2023 was primarily attributable in each year to several specific claims.

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Unrealized holding gains on available-for-sale investments, net of tax expense	$ 660	$ 604	$ 942

Schedule of Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
Schedule of Income Taxes (Detail) - USD ($) $ in Thousands	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Income Tax Disclosure [Line Items]
Federal	$ 44,000	$ 41,000	$ 76,000
State	5,807	6,137	14,928
Foreign	1,644	391	1,767
Total income taxes paid, net of refunds	$ 51,451	$ 47,528	$ 92,695

Significant Accounting Policies (Tables)

12 Months Ended

Dec. 27, 2025

Accounting Policies [Abstract]

Schedule of Disaggregation of Revenue


	Fiscal Years Ended
Mode	December 27, 2025			December 28, 2024			December 30, 2023
Truck – BCO Independent Contractors		38	%		38	%		38	%
Truck – Truck Brokerage Carriers		53	%		52	%		53	%
Rail intermodal		2	%		2	%		2	%
Ocean and air cargo carriers		5	%		6	%		5	%
Truck Equipment Type
Van equipment	$	2,328,386		$	2,447,810		$	2,742,281
Unsided/platform equipment	$	1,527,802		$	1,455,663		$	1,490,393
Less-than-truckload	$	95,856		$	99,828		$	117,683
Other truck transportation (1)	$	383,970		$	343,253		$	479,173

(1)

Summary of Activity in Allowance for Doubtful Accounts

Following is a summary of the activity in the allowance for doubtful accounts for fiscal years ending December 27, 2025, December 28, 2024 and December 30, 2023 (in thousands):


	Balance at Beginning of Period		Charged to Costs and Expenses		Write-offs, Net of Recoveries			Balance at End of Period
For the Fiscal Year Ended December 27, 2025
Trade receivables	$	12,904	$	5,835	$	(6,249	)	$	12,490
Other receivables		19,276		10,738		(5,402	)		24,612
Other non-current receivables		208		1		—			209

	$	32,388	$	16,574	$	(11,651	)	$	37,311

For the Fiscal Year Ended December 28, 2024
Trade receivables	$	11,738	$	6,449	$	(5,283	)	$	12,904
Other receivables		15,376		11,811		(7,911	)		19,276
Other non-current receivables		206		6		(4	)		208

	$	27,320	$	18,266	$	(13,198	)	$	32,388

For the Fiscal Year Ended December 30, 2023
Trade receivables	$	12,121	$	5,704	$	(6,087	)	$	11,738
Other receivables		11,745		8,325		(4,694	)		15,376
Other non-current receivables		203		3		—			206

	$	24,069	$	14,032	$	(10,781	)	$	27,320

Retirement Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Retirement Plans [Line Items]
Defined contribution plan maximum employee contribution as a percentage of base salary	75.00%
Expense for the Company-sponsored defined contribution plan	$ 2,868,000	$ 2,805,000	$ 2,812,000
First 3% of Contributions on Defined Contribution Plan
Retirement Plans [Line Items]
Defined contribution plan employer contribution as a percentage of base salary	100.00%
Threshold to determine company matching percentage	3.00%
Next 2% of Contributions on Defined Contribution Plan
Retirement Plans [Line Items]
Defined contribution plan employer contribution as a percentage of base salary	50.00%
Threshold to determine company matching percentage	2.00%

Cover Page - USD ($)	12 Months Ended
Cover Page - USD ($)	Dec. 27, 2025	Jan. 23, 2026	Jun. 28, 2025
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Document Annual Report	true
Entity Central Index Key	0000853816
Document Transition Report	false
Current Fiscal Year End Date	--12-27
Document Period End Date	Dec. 27, 2025
Entity Registrant Name	Landstar System, Inc.
Entity Filer Category	Large Accelerated Filer
Trading Symbol	LSTR
Title of 12(b) Security	Common Stock
Security Exchange Name	NASDAQ
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		34,058,726
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity File Number	0-21238
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	06-1313069
Entity Address, Address Line One	13410 Sutton Park Drive South
Entity Address, City or Town	Jacksonville
Entity Address, Postal Zip Code	32224
City Area Code	904
Local Phone Number	398-9400
Entity Address, State or Province	FL
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Public Float			$ 4,792,022,000
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Auditor Firm ID	185
Auditor Name	KPMG LLP
Auditor Location	Jacksonville, Florida

Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Dividends per common share	$ 3.56	$ 3.38	$ 3.26

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 27, 2025
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	(11) Commitments and Contingencies At December 27, 2025, in addition to the $75,331,000 letters of credit secured by investments, Landstar had $34,916,000 of letters of credit outstanding under the Company’s Credit Agreement. As previously disclosed by the Company in its Quarterly Report on Form 10-Q for the 2025 second quarter filed with the SEC on July 29, 2025, the Current Report on Form 8-K filed with the SEC on August 13, 2025, the Quarterly Report on Form 10-Q for the 2025 third quarter filed with the SEC on October 28, 2025, and the Current Report on Form 8-K filed with the SEC on January 21, 2026, a trial verdict (the “Verdict”) was rendered on August 6, 2025 in state court in El Paso County, Texas, in the matter of Eduardo Cabral, et. al. v. Landstar Ranger, Inc., et. al. (the “Cabral Matter”). As previously disclosed, the Verdict included a determination by the jury that Landstar Ranger, Inc. (“Landstar Ranger”) acted as a broker and not as a motor carrier with respect to the transportation of the shipment involved in a tragic accident. The Verdict also determined total monetary damages of $ 22.8 million and that 15 % of such damages, or $ 3.42 million, was attributable to Landstar Ranger, with the remainder of the total monetary damages attributable to the hauling motor carrier and the hauling motor carrier’s employee truck driver. On January 13, 2026, the trial court entered a judgment (the “Judgment”) with respect to the Verdict that found Landstar Ranger financially responsible for 100 %, rather than 15 %, of the $ 22.8 million of monetary damages awarded to the plaintiffs, plus pre-judgment interest. As a result of the Judgment, the Company recorded a pre-tax charge of approximately $ 5.7 million during the 2025 fiscal fourth quarter to insurance and claim costs. As also previously disclosed, during fiscal year 2025, the company received cash payments of $ 12,000,000 from third party reinsurance providers in the form of a “no claims bonus” due to favorable loss experience with respect to claims incurred during the applicable policy period. In connection with the Judgment, the Company has reclassified this “no claims bonus” from current liabilities to current insurance claims in the consolidated balance sheet as of December 27, 2025. The Company intends to vigorously appeal the Cabral Matter, including the Judgment; however, no assurances can be provided as to the probability of success with respect to any potential appeals relating to the Cabral Matter, generally, or the Judgment, specifically, or the ultimate outcome of any such appeals. The total cost associated with the Cabral Matter, which may include post-judgment interest, bonding-related costs and legal and other professional fees, will depend on many factors and the ultimate financial impact, as well as the timing of the ultimate resolution of this matter, are difficult to predict. The Company is involved in certain other claims and pending litigation arising from the normal conduct of business. Many of these claims are covered in whole or in part by insurance. Based on knowledge of the facts and, in certain cases, opinions of outside counsel, management believes that adequate provisions have been made for probable and reasonably estimable losses with respect to the resolution of all such claims and pending litigation and that the ultimate outcome, after provisions therefor, will not have a material adverse effect on the financial condition of the Company, but could have a material effect on the results of operations in a given quarter or year.