# EDGAR Filing Document

**Accession Number:** 0000889331
**File Stem:** 0001140361-26-009258
**Filing Date:** 2026-3
**Character Count:** 2037
**Document Hash:** 5f1234f3b09785ed4f801540fdbf61b7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-009258.hdr.sgml**: 20260312

**ACCESSION NUMBER**: 0001140361-26-009258

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260312

**DATE AS OF CHANGE**: 20260312

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** LITTELFUSE INC /DE
- **CENTRAL INDEX KEY:** 0000889331
- **STANDARD INDUSTRIAL CLASSIFICATION:** SWITCHGEAR & SWITCHBOARD APPARATUS [3613]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 363795742
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1227

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-20388
- **FILM NUMBER:** 26748995

**BUSINESS ADDRESS:**
- **STREET 1:** 6133 NORTH RIVER ROAD
- **STREET 2:** SUITE 500
- **CITY:** ROSEMONT
- **STATE:** IL
- **ZIP:** 60018
- **BUSINESS PHONE:** 773-628-1000

**MAIL ADDRESS:**
- **STREET 1:** 6133 NORTH RIVER ROAD
- **STREET 2:** SUITE 500
- **CITY:** ROSEMONT
- **STATE:** IL
- **ZIP:** 60018

### UNITED STATES <br>

### SECURITIES AND EXCHANGE COMMISSION <br>

#### WASHINGTON, D.C. 20549

### SCHEDULE 14A

#### PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE <br>

#### SECURITIES EXCHANGE ACT OF 1934
☒<br> Filed by the Registrant

☐<br> Filed by a Party other than the Registrant

Check the appropriate box:

☐<br> Preliminary Proxy Statement

☐<br> CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2))

☐ Definitive Proxy Statement

☒<br> Definitive Additional Materials

☐<br> Soliciting Material under Section 240.14a-12

## LITTELFUSE, INC. <br>

#### (Name of Registrant as Specified in its Charter)
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

☒<br> No fee required

☐<br> Fee paid previously with preliminary materials

☐<br> Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

------

![](ny20057422x3-pc_1.jpg)

------

![](ny20057422x3-pc2_.jpg)