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Summary of Significant Accounting Policies and Other Information | 9 Months Ended
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Sep. 27, 2025
Accounting Policies [Abstract] |
Summary of Significant Accounting Policies and Other Information | Summary of Significant Accounting Policies and Other Information Nature of Operations Founded in 1927, Littelfuse, Inc. ("Littelfuse" or the "Company") is a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world. Across more than 20 countries, and with approximate l y 16,000 g lob al associates, the Company partners with customers to design and deliver innovative, reliable solutions. Serving over 100,000 end customers, the Company’s products are found in a variety of industrial, transportation and electronics end markets – everywhere, every day. Basis of Presentation The Company’s accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles ("GAAP") for interim financial information, the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, certain information and disclosures normally included in the consolidated balance sheets, statements of net income and comprehensive income, statements of cash flows, and statements of stockholders' equity prepared in conformity with U.S. GAAP have been condensed or omitted as permitted by such rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. They have been prepared in accordance with accounting policies described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 28, 2024, which should be read in conjunction with the disclosures therein. In the opinion of management, all adjustments considered necessary for a fair presentation have been included and are of a normal, recurring nature. Operating results for interim periods are not necessarily indicative of annual operating results. Revenue Recognition Revenue Disaggregation The following tables disaggregate the Company’s revenue by primary business units for the three and nine months ended September 27, 2025 and September 28, 2024:
|  | Three Months Ended September 27, 2025 |  | Nine Months Ended September 27, 2025
(in thousands) |  | Electronics Segment |  | Transportation Segment |  | Industrial Segment |  | Total |  | Electronics Segment |  | Transportation Segment |  | Industrial Segment |  | Total
Electronics – Semiconductor |  | $ | 174,073 |  |  | $ | — |  |  | $ | — |  |  | $ | 174,073 |  |  | $ | 499,329 |  |  | $ | — |  |  | $ | — |  |  | $ | 499,329 |
Electronics – Passive Products and Sensors |  | 183,384 |  |  | — |  |  | — |  |  | 183,384 |  |  | 501,043 |  |  | — |  |  | — |  |  | 501,043 |
Commercial Vehicle Products |  | — |  |  | 80,272 |  |  | — |  |  | 80,272 |  |  | — |  |  | 244,301 |  |  | — |  |  | 244,301 |
Passenger Car Products |  | — |  |  | 75,636 |  |  | — |  |  | 75,636 |  |  | — |  |  | 220,822 |  |  | — |  |  | 220,822 |
Automotive Sensors |  | — |  |  | 15,403 |  |  | — |  |  | 15,403 |  |  | — |  |  | 47,450 |  |  | — |  |  | 47,450 |
Industrial Products |  | — |  |  | — |  |  | 95,872 |  |  | 95,872 |  |  | — |  |  | — |  |  | 279,415 |  |  | 279,415 |
Total |  | $ | 357,457 |  |  | $ | 171,311 |  |  | $ | 95,872 |  |  | $ | 624,640 |  |  | $ | 1,000,372 |  |  | $ | 512,573 |  |  | $ | 279,415 |  |  | $ | 1,792,360 |
|  | Three Months Ended September 28, 2024 |  | Nine Months Ended September 28, 2024
(in thousands) |  | Electronics Segment |  | Transportation Segment |  | Industrial Segment |  | Total |  | Electronics Segment |  | Transportation Segment |  | Industrial Segment |  | Total
Electronics – Semiconductor |  | $ | 151,954 |  |  | $ | — |  |  | $ | — |  |  | $ | 151,954 |  |  | $ | 469,389 |  |  | $ | — |  |  | $ | — |  |  | $ | 469,389 |
Electronics – Passive Products and Sensors |  | 152,234 |  |  | — |  |  | — |  |  | 152,234 |  |  | 431,543 |  |  | — |  |  | — |  |  | 431,543 |
Commercial Vehicle Products |  | — |  |  | 82,077 |  |  | — |  |  | 82,077 |  |  | — |  |  | 242,350 |  |  | — |  |  | 242,350 |
Passenger Car Products |  | — |  |  | 71,299 |  |  | — |  |  | 71,299 |  |  | — |  |  | 210,597 |  |  | — |  |  | 210,597 |
Automotive Sensors |  | — |  |  | 18,005 |  |  | — |  |  | 18,005 |  |  | — |  |  | 57,764 |  |  | — |  |  | 57,764 |
Industrial Products |  | — |  |  | — |  |  | 91,821 |  |  | 91,821 |  |  | — |  |  | — |  |  | 249,620 |  |  | 249,620 |
Total |  | $ | 304,188 |  |  | $ | 171,381 |  |  | $ | 91,821 |  |  | $ | 567,390 |  |  | $ | 900,932 |  |  | $ | 510,711 |  |  | $ | 249,620 |  |  | $ | 1,661,263 |
See Note 14, Segment Information, for net sales by segment and country. Revenue Recognition The Company recognizes revenue on product sales in the period in which the Company satisfies its performance obligation and control of the product is transferred to the customer. The Company’s sales arrangements with customers are predominately short term in nature and generally provide for transfer of control at the time of shipment as this is the point at which title and risk of loss of the product transfers to the customer. At the end of each period, for those shipments where title to the products and the risk of loss and rewards of ownership do not transfer until the product has been received by the customer, the Company adjusts revenues and cost of sales for the delay between the time that the products are shipped and when they are received by the customer. The amount of revenue recorded reflects the consideration to which the Company expects to be entitled in exchange for goods and may include adjustments for customer allowances, rebates and price adjustments. The Company’s distribution channels are primarily through direct sales and independent third-party distributors. The Company has elected the practical expedient under Accounting Standards Codification ("ASC") 340-40-25-4 to expense commissions when incurred as the amortization period of the commission asset the Company would have otherwise recognized is less than one year. Revenue and Billing The Company generally accepts orders from customers through receipt of purchase orders or electronic data interchange based on written sales agreements and purchasing contracts. Contract pricing and selling agreement terms are based on market factors, costs, and competition. Pricing is often negotiated as an adjustment (premium or discount) from the Company’s published price lists. The customer is invoiced when the Company’s products are shipped to them in accordance with the terms of the sales agreement. As the Company’s standard payment terms are less than one year, the Company elected the practical expedient under ASC 606-10-32-18 to not assess whether a contract has a significant financing component. The Company also elected the practical expedient provided in ASC 606-10-25-18B to treat all product shipping and handling activities as fulfillment activities, and therefore recognize the gross revenue associated with the contract, inclusive of any shipping and handling revenue. Ship and Debit Program Some of the terms of the Company’s sales agreements and normal business conditions provide customers (distributors) the ability to receive price adjustments on products previously shipped and invoiced. This practice is common in the industry and is referred to as a “ship and debit” program. This program allows the distributors to debit the Company for the difference between the distributors’ contracted price and a lower price for specific transactions. Under certain circumstances (usually in a competitive situation or large volume opportunity), a distributor will request authorization for pricing allowances to reduce its price. When the Company approves such a reduction, the distributor is authorized to “debit” its account for the difference between the contracted price and the lower approved price. The Company establishes reserves for this program based on historical activity, distributor inventory levels and actual authorizations for the debit and recognizes these debits as a reduction of revenue. Return to Stock The Company has a return to stock policy whereby certain customers, with prior authorization from the Company's management, can return previously purchased goods for full or partial credit. The Company establishes an estimated allowance for these returns based on historical activity. Sales revenue and cost of sales are reduced to anticipate estimated returns. Volume Rebates The Company offers volume-based sales incentives to certain customers to encourage greater product sales. If customers achieve their specific quarterly or annual sales targets, they are entitled to rebates. The Company estimates the projected amount of rebates that will be achieved by the customer and recognizes this estimated cost as a reduction to revenue as products are sold. Cash, Cash Equivalents, and Restricted Cash The following table provides a reconciliation of cash, cash equivalents, and restricted cash at September 27, 2025 and December 28, 2024 reported within the Condensed Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Condensed Consolidated Statement of Cash Flows.
(in thousands) |  | September 27, 2025 |  | December 28, 2024
Cash and cash equivalents |  | $ | 814,733 |  |  | $ | 724,924 |
Restricted cash included in other long-term assets |  | 1,696 |  |  | 1,513 |
Total cash, cash equivalents, and restricted cash |  | $ | 816,429 |  |  | $ | 726,437 |
Recently Issued Accounting Standards In September 2025, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Updates ("ASU") No. 2025-06, "Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software." The amendments in this update require the entity to start capitalizing software costs when both of the following criteria are met: (1) management has authorized and committed to funding the software project, and (2) it is probable that the project will be completed and the software will be used to perform the function intended (referred to as the "probable-to-complete recognition threshold"). The amendments clarify that the intangibles disclosures are not required for capitalized internal-use software costs. Additionally, the amendments in this update supersede the website development costs guidance and incorporate the recognition requirements for website-specific development costs. The guidance is effective for fiscal years beginning after December 15, 2027 with early adoption permitted. The Company is currently evaluating the potential effects of these amendments on its Condensed Consolidated Financial Statements. In September 2025, the FASB issued ASU No. 2025-05, "Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets." The amendments in this update provide entities with a practical expedient when estimating expected credit losses for current accounts receivable and current contract assets arising from transactions accounted for under Topic 606. In developing reasonable and supportable forecasts as part of estimating expected credit losses, the practical expedient allows entities to assume that current conditions as of the balance sheet date do not change for the remaining life of the asset. The guidance is effective for fiscal years beginning after December 15, 2025 with early adoption permitted. The Company does not expect any material effect of the adoption of this guidance on the Company's Condensed Consolidated Financial Statements. In November 2024, the FASB issued ASU No. 2024-03, "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40)." The amendments in this update require disclosure, in the notes to financial statements, of specified information about certain costs and expenses. The amendments require that at each interim and annual reporting period an entity (a) disclose the amounts of (i) purchases of inventory, (ii) employee compensation, (iii) depreciation, (iv) intangible asset amortization, and (v) depreciation, depletion, and amortization recognized as part of oil and gas producing activities ("DD&A") included in each relevant expense caption. A relevant expense caption is an expense caption presented on the face of the income statement within continuing operations that contains any of the expense categories listed in (i)-(v); (b) include certain amounts that are already required to be disclosed under current GAAP in the same disclosure as the other disaggregation requirements (c) disclose a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively (d) disclose the total amount of selling expenses and, in annual reporting periods, an entity’s definition of selling expenses. The guidance is effective for fiscal years beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027, with early adoption permitted. The adoption of this guidance will increase the Company's disclosures in its Consolidated Financial Statements. The Company is currently evaluating the potential impact on the disclosures in the Company's Condensed Consolidated Financial Statements. In December 2023, the FASB issued ASU No. 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures." The amendments in this update provide more transparency about income tax information through improvements to the income tax disclosure primarily related to the income tax rate reconciliation and income taxes paid information. These requirements include: (1) consistent categories and greater disaggregation of information in the rate reconciliation and (2) income taxes paid disaggregated by jurisdiction. The other amendments in this update improve the effectiveness and comparability of disclosures by (3) adding disclosures of pretax income (or loss) and income tax expense (or benefit), and (4) removing disclosures that are no longer considered cost beneficial or relevant. The guidance is effective for fiscal years beginning after December 15, 2024 with early adoption permitted. The adoption of this guidance will modify disclosures in the Company's Condensed Consolidated Financial Statements. In October 2023, the FASB issued ASU No. 2023-06, "Disclosure Improvements." The amendments in this update represent changes to clarify or improve the disclosure or presentation requirements of a variety of Topics in the ASC. The Company may be affected by one or more of those amendments. The amendments in this ASU should be applied prospectively and will not be effective until June 30, 2027. The Company is currently evaluating the potential effects of these amendments on its Condensed Consolidated Financial Statements.

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