# EDGAR Filing Document

**Accession Number:** 0000855658
**File Stem:** 0001140361-26-010151
**Filing Date:** 2026-3
**Character Count:** 2025
**Document Hash:** d41e81903af02d54f8b96aa1cbfbff2c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-010151.hdr.sgml**: 20260318

**ACCESSION NUMBER**: 0001140361-26-010151

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260318

**DATE AS OF CHANGE**: 20260318

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** LATTICE SEMICONDUCTOR CORP
- **CENTRAL INDEX KEY:** 0000855658
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 930835214
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0103

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-18032
- **FILM NUMBER:** 26768765

**BUSINESS ADDRESS:**
- **STREET 1:** 5555 NE MOORE CT
- **CITY:** HILLSBORO
- **STATE:** OR
- **ZIP:** 97124
- **BUSINESS PHONE:** 5032688000

**MAIL ADDRESS:**
- **STREET 1:** 5555 NE MOORE CT
- **CITY:** HILLSBORO
- **STATE:** OR
- **ZIP:** 97124

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### 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 ☒ Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐<br> Preliminary Proxy Statement

☐ **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 Pursuant to §240.14a-12

### LATTICE SEMICONDUCTOR CORPORATION<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.

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