LFUS · Nasdaq · CIK 0000889331

LITTELFUSE INC /DE

LITTELFUSE INC /DE’s most recent SEC filing in our snapshot is a Form 8-K filed on Sep 17, 2026. In fiscal 2025 (year ended Dec 27, 2025) it reported revenue of $2.4B and net income of -$71.7M, according to its XBRL data on EDGAR. Its EDGAR record lists 118 Form 4 insider filings from the 12 months before our last refresh.

SEC EDGAR snapshot updated Oct 27, 2026, 11:27 PM EDT. See all filings on sec.gov.

Revenue, FY2025
$2.4B
Net income, FY2025
-$71.7M
Form 4 filings on record, past 12 months
118

Company overview

Legal name (as filed)
LITTELFUSE INC /DE
Ticker
LFUS
SEC Central Index Key (CIK)
0000889331
Industry (SIC)
Switchgear & Switchboard Apparatus (code 3613)
Business address
ROSEMONT, IL
State or country of incorporation
DE
Fiscal year ends
December 26
SEC filer category
Large accelerated filer
Position in SEC ticker list
#968 of the 3,000 companies we track

Five-year financial highlights

Full-year figures from LITTELFUSE INC /DE’s annual reports, as tagged in XBRL and published by the SEC. Amounts are in U.S. dollars; the fiscal year is named for the calendar year in which it ends.

Revenue
$2.1BFY2022$2.5BFY2022$2.4BFY2023$2.2BFY2024$2.4BFY2025
Net income
$283.8MFY2022$373.3MFY2022$259.5MFY2023$100.2MFY2024-$71.7MFY2025
LFUS annual results
ItemFY2022
ended Jan 1, 2022		FY2022
ended Dec 31, 2022		FY2023
ended Dec 30, 2023		FY2024
ended Dec 28, 2024		FY2025
ended Dec 27, 2025
Revenue$2.1B$2.5B$2.4B$2.2B$2.4B
Net income$283.8M$373.3M$259.5M$100.2M-$71.7M
Diluted EPS$11.38$14.94$10.34$4.00-$2.89
Total assets$3.2B$3.9B$4.0B$3.9B$4.0B
Cash and equivalents$478.5M$562.6M$555.5M$724.9M$563.4M

XBRL tags used: revenue = RevenueFromContractWithCustomerIncludingAssessedTax; netIncome = NetIncomeLoss; assets = Assets; eps = EarningsPerShareDiluted; cash = CashAndCashEquivalentsAtCarryingValue. EPS is shown as originally reported for each year and may not be adjusted for later stock splits. A dash means the company did not report that item in a form we could match.

How to read these numbers

Revenue is the money a company brings in from selling its products and services; net income is what is left after all expenses, interest and taxes. Diluted EPS spreads net income across every share that could exist if options and convertible securities were exercised. Total assets and cash are balance-sheet figures measured on the last day of the fiscal year. For the full story — segment results, one-time charges, guidance — read Management’s Discussion and Analysis in the Form 10-K.

Latest key reports

The most recent filing of each major report type, even if it falls outside the 40 newest filings below.

LFUS latest annual, quarterly, current and proxy reports
FiledFormWhat it isOriginal
Feb 19, 202610-KAnnual report· period Dec 27, 2025Document · Index
Jul 29, 202610-QQuarterly report· period Jun 27, 2026Document · Index
Sep 17, 20268-KRegulation FD disclosure· period Sep 15, 2026Document · Index
Mar 12, 2026DEF 14ADefinitive proxy statement· period Apr 22, 2026Document · Index

Recent SEC filings

The 40 newest documents filed by or about LITTELFUSE INC /DE, by form type:

4 ×30144 ×48-K ×43 ×110-Q ×1
LFUS recent filings
FiledFormWhat it isOriginal
Sep 17, 20268-KRegulation FD disclosure· period Sep 15, 2026Document · Index
Sep 16, 20268-KDirector or officer change· period Sep 10, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Sep 8, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 3, 2026Document · Index
Aug 17, 20264Statement of changes in beneficial ownership (insider trade)· period Aug 14, 2026Document · Index
Aug 12, 20264Statement of changes in beneficial ownership (insider trade)· period Aug 11, 2026Document · Index
Aug 11, 20264Statement of changes in beneficial ownership (insider trade)· period Aug 6, 2026Document · Index
Aug 11, 20263Initial statement of beneficial ownership· period Aug 6, 2026Document · Index
Aug 11, 20268-KDirector or officer change; Regulation FD disclosure· period Aug 6, 2026Document · Index
Jul 31, 20264Statement of changes in beneficial ownership (insider trade)· period Jul 30, 2026Document · Index
Jul 29, 202610-QQuarterly report· period Jun 27, 2026Document · Index
Jul 29, 20268-KResults of operations; Regulation FD disclosure· period Jul 29, 2026Document · Index
Jul 17, 2026144Notice of proposed sale of securitiesDocument · Index
Jun 22, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 18, 2026Document · Index
Jun 18, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 18, 2026Document · Index
Jun 18, 2026144Notice of proposed sale of securitiesDocument · Index
Jun 16, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 15, 2026144Notice of proposed sale of securitiesDocument · Index
Jun 11, 2026144Notice of proposed sale of securitiesDocument · Index
Jun 11, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 11, 2026Document · Index
Jun 8, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 4, 2026Document · Index
Jun 8, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 4, 2026Document · Index
Jun 8, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 4, 2026Document · Index
Jun 8, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 4, 2026Document · Index
Jun 8, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 4, 2026Document · Index

Insider filing activity

118 Form 4 filings appear in LITTELFUSE INC /DE’s EDGAR record between Oct 28, 2025 and our last refresh. Most are reports by the company’s own directors, officers and 10% owners, but EDGAR also lists a Form 4 under a company when the company itself is the insider — for example, when it owns more than 10% of another public company. Foreign private issuers’ own insiders generally do not file Form 4. A high count is not by itself a signal: many Form 4s report routine stock awards, tax withholding or sales under pre-arranged Rule 10b5-1 plans. Open each filing to see the transaction code, share count and price. What a Form 4 shows.

Other companies in Switchgear & Switchboard Apparatus

All 2 companies in Switchgear & Switchboard Apparatus· Companies headquartered in Illinois

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Source

  • U.S. Securities and Exchange Commission, EDGAR submissions for CIK 0000889331 and XBRL company facts. LITTELFUSE INC /DE on EDGAR.
  • Snapshot updated Oct 27, 2026, 11:27 PM EDT. The SEC does not endorse OpenFilings. Company names and tickers are used only to identify the filer; no logos are shown.

Not investment advice. This page summarizes public SEC filings for information only. Figures may contain errors or omissions; confirm everything in the original filing before relying on it.