What SEC filings does Littelfuse, Inc. submit to the SEC?

Littelfuse, Inc. (LFUS) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about LFUS?

A Form 4 for LFUS discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Littelfuse, Inc.?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for LFUS?

The 10-K is Littelfuse, Inc.'s annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all LFUS SEC filings directly on EDGAR?

You can view all historical Littelfuse, Inc. filings on the SEC EDGAR company page for LFUS. Each filing card on this page links directly to the original SEC document.

How often does Littelfuse, Inc. file with the SEC?

Littelfuse, Inc. files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling LFUS shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

LFUS SEC Filing News — Littelfuse, Inc.

Latest SEC filings for Littelfuse, Inc. (LFUS) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-09-17.

Littelfuse, Inc. designs, manufactures, and sells electronic components, modules, and subassemblies. It operates through three segments: Electronics, Transportation, and Industrial. Its Electronics segment offers fuses and fuse accessories, coefficient resettable fuses, switches and interconnect solutions, polymer electrostatic discharge suppressors, varistors, reed switch based magnetic sensing, and gas discharge tubes; and discrete transient voltage suppressor diodes, TVS diode arrays, protect…

Sector: Technology Industry: Electronic Components Market Cap: $9.8B

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

What you're looking at: Each item below is parsed from an actual SEC filing submitted by Littelfuse, Inc.. Form 4 = confirmed insider transaction · Form 144 = proposed sale notice · 8-K = material event (earnings, M&A, leadership change, etc.) · 10-Q / 10-K = quarterly / annual report.

LFUS Filing Activity Snapshot 2026-08-17 — 2026-09-17

Insider Transactions (Form 4)

0 buys vs 0 sells

Insider buying and selling activity is balanced in this period.

Insider Transactions 18 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 18 filings in this group are Form 4s for Littelfuse, Inc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 18 insider filings shown, the breakdown is 17 compensation award and 1 tax withholding. None of the classified filings involved a discretionary open-market trade, so this period says nothing about what insiders think of the price.

What each transaction type means

Compensation award ×17: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Tax withholding ×1: Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

HUNTER GORDON (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	7	$414.24	$2.9K
`A`	Compensation award	1	$414.24	$414.24

Filing: Form 4 (Insider Transaction) Insider: HUNTER GORDON (Director) Shares: 8

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

Cerniglia Kristina A. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1	$414.24	$414.24

Filing: Form 4 (Insider Transaction) Insider: Cerniglia Kristina A. (Director) Shares: 1

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

GREEN MARIA C (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	3	$414.24	$1.2K

Filing: Form 4 (Insider Transaction) Insider: GREEN MARIA C (Director) Shares: 3

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

Kim Peter Sung-Jip (SVP & GM Industrial Business) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	5	$414.24	$2.1K

Filing: Form 4 (Insider Transaction) Insider: Kim Peter Sung-Jip (SVP & GM Industrial Business) Shares: 5

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

D'Angelo Anne-Marie W (SVP & CLO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	3	$414.24	$1.2K

Filing: Form 4 (Insider Transaction) Insider: D'Angelo Anne-Marie W (SVP & CLO) Shares: 3

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

Khandelwal Abhishek (Executive VP, CFO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	15	$414.24	$6.2K

Filing: Form 4 (Insider Transaction) Insider: Khandelwal Abhishek (Executive VP, CFO) Shares: 15

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

Chu Maggie (SVP, CHRO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	5	$414.24	$2.1K

Filing: Form 4 (Insider Transaction) Insider: Chu Maggie (SVP, CHRO) Shares: 5

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

CHUNG T J (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	17	$414.24	$7.0K
`A`	Compensation award	1	$414.24	$414.24

Filing: Form 4 (Insider Transaction) Insider: CHUNG T J (Director) Shares: 18

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

Ruppel David (SVP & GM Transportation Bus.) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	5	$414.24	$2.1K

Filing: Form 4 (Insider Transaction) Insider: Ruppel David (SVP & GM Transportation Bus.) Shares: 5

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

Kelsey Todd P. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1	$414.24	$414.24

Filing: Form 4 (Insider Transaction) Insider: Kelsey Todd P. (Director) Shares: 1

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

PAEPER HOLLY Beth (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1	$414.24	$414.24

Filing: Form 4 (Insider Transaction) Insider: PAEPER HOLLY Beth (Director) Shares: 1

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

Gorski Jeffrey G (SVP & Chief Accounting Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1	$414.24	$414.24

Filing: Form 4 (Insider Transaction) Insider: Gorski Jeffrey G (SVP & Chief Accounting Officer) Shares: 1

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

Nayar Deepak (SVP & GM Electronics Business) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	8	$414.24	$3.3K

Filing: Form 4 (Insider Transaction) Insider: Nayar Deepak (SVP & GM Electronics Business) Shares: 8

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

GRILLO ANTHONY (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	58	$414.24	$24.0K
`A`	Compensation award	3	$414.24	$1.2K

Filing: Form 4 (Insider Transaction) Insider: GRILLO ANTHONY (Director) Shares: 61

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

NOGLOWS WILLIAM P (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	6	$414.24	$2.5K
`A`	Compensation award	1	$414.24	$414.24

Filing: Form 4 (Insider Transaction) Insider: NOGLOWS WILLIAM P (Director) Shares: 7

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

Hamed Karim Wagdy (SVP & GM Semiconductor Busines) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	5	$414.24	$2.1K

Filing: Form 4 (Insider Transaction) Insider: Hamed Karim Wagdy (SVP & GM Semiconductor Busines) Shares: 5

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-08

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

Henderson Gregory N. (Director, President & CEO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	30	$414.24	$12.4K

Filing: Form 4 (Insider Transaction) Insider: Henderson Gregory N. (Director, President & CEO) Shares: 30

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-08-17

LFUS insider Form 4 filed for equity award, exercise, or tax withholding

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	168	$457.57	$76.9K

Filing: Form 4 (Insider Transaction) Insider: Ruppel David (SVP & GM Transportation Bus.) Shares: 168

View on SEC EDGAR → Open Filing Document →

Material Events 2 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 2 in this period for Littelfuse, Inc. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-09-17

LFUS filed 8-K — material company event

LITTELFUSE INC /DE filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-09-16

LFUS filed 8-K — material company event

LITTELFUSE INC /DE filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

How we classify Littelfuse, Inc.'s filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on LFUS. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — LFUS SEC Filings

More Tools for LFUS

LFUS Full Stock Analysis LFUS Live Chart Institutional Ownership Earnings Calendar Options Flow Scanner Semiconductor Demand Zone Tracker Sector Scanner Browse All Stocks

Want deeper LFUS analysis?

View valuation, growth metrics, the rule-based stock-page score, demand zones, peer comparison, and more — all on the LFUS stock analysis page.

LFUS Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

Data Sources · Methodology · AI Disclosure · Corrections Policy · Disclaimer