# EDGAR Filing Document

**Accession Number:** 0000707549
**File Stem:** 0001140361-25-036021
**Filing Date:** 2025-9
**Character Count:** 2165
**Document Hash:** c177a3d3f16213102ff67b70756c6806
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-25-036021.hdr.sgml**: 20250924

**ACCESSION NUMBER**: 0001140361-25-036021

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20250924

**DATE AS OF CHANGE**: 20250924

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** LAM RESEARCH CORP
- **CENTRAL INDEX KEY:** 0000707549
- **STANDARD INDUSTRIAL CLASSIFICATION:** SPECIAL INDUSTRY MACHINERY, NEC [3559]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 942634797
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0629

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-12933
- **FILM NUMBER:** 251338923

**BUSINESS ADDRESS:**
- **STREET 1:** 4650 CUSHING BLVD
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538
- **BUSINESS PHONE:** 5106590200

**MAIL ADDRESS:**
- **STREET 1:** 4650 CUSHING PARKWAY
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538

### UNITED STATES <br>

### SECURITIES AND EXCHANGE COMMISSION <br>

#### Washington, D.C. 20549

### SCHEDULE 14A

#### (Rule 14a-101)<br>

#### INFORMATION REQUIRED IN PROXY STATEMENT<br>

#### SCHEDULE 14A INFORMATION<br>

#### Proxy Statement Pursuant to Section 14(a) of<br>

#### the Securities Exchange Act of 1934
Filed by the Registrant ☒

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))** <br>

☐ Definitive Proxy Statement <br>

☒ Definitive Additional Materials <br>

☐ Soliciting Material Pursuant to §240.14a-12

## LAM RESEARCH CORPORATION<br>

#### (Name of Registrant as Specified In Its Charter) <br>

#### &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>

#### (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
Payment of Filing Fee (Check the appropriate box):

☒ 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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