# EDGAR Filing Document

**Accession Number:** 0000707549
**File Stem:** 0000707549-25-000078
**Filing Date:** 2025-9
**Character Count:** 8608
**Document Hash:** f0617486a3d01574c196bf5cb0b93079
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000707549-25-000078.hdr.sgml**: 20250911

**ACCESSION NUMBER**: 0000707549-25-000078

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20250908

**ITEM INFORMATION**: Changes in Registrant's Certifying Accountant

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20250911

**DATE AS OF CHANGE**: 20250911

**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:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-12933
- **FILM NUMBER:** 251308560

**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

?xml version='1.0' encoding='ASCII'? lrcx-20250908

<u>[**Table of Contents**](#i1ea87843a5db4cff81839f0426ade41e_7)</u>

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**FORM 8-K** 

**Current Report** 

**Pursuant to Section 13 or 15(d) of the** 

**Securities Exchange Act of 1934** 

**Date of report (Date of earliest event reported): September 8, 2025**

**LAM RESEARCH CORPORATION** 

**(Exact name of registrant as specified in its charter)** 

---

| | | |
|:---|:---|:---|
| **Delaware** | **0-12933** | **94-2634797** |
| **(State or Other Jurisdiction<br>of Incorporation)** | **(Commission<br>File Number)** | **(IRS Employer<br>Identification Number)** |

---

**4650 Cushing Parkway**

**Fremont, California 94538**

**(Address of principal executive offices including zip code)**

**(510) 572-0200**

**(Registrant's telephone number, including area code)**

**Not Applicable**

**(Former name or former address, if changed since last report)**

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol | Name of each exchange on which registered |
| Common Stock, Par Value $0.001 Per Share | LRCX | The Nasdaq Stock Market |
|  |  | (Nasdaq Global Select Market) |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company &nbsp;&nbsp;&nbsp;&nbsp;☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; ☐

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<u>[**Table of Contents**](#i1ea87843a5db4cff81839f0426ade41e_7)</u>

**Table of Contents**

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| | | |
|:---|:---|:---|
| Item 4.01. | <u>[Changes in Registrant's Certifying Accountant](#i1ea87843a5db4cff81839f0426ade41e_10)</u> | <u>[3](#i1ea87843a5db4cff81839f0426ade41e_10)</u> |
| Item 9.01. | <u>[F](#i1ea87843a5db4cff81839f0426ade41e_126)[inancial Stat](#i1ea87843a5db4cff81839f0426ade41e_126)[ements and Exhibits](#i1ea87843a5db4cff81839f0426ade41e_126)</u> | <u>[3](#i1ea87843a5db4cff81839f0426ade41e_126)</u> |
| <u>SIGNATURES</u> | <u>SIGNATURES</u> | <u>[4](#i1ea87843a5db4cff81839f0426ade41e_13)</u> |

---

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<u>[**Table of Contents**](#i1ea87843a5db4cff81839f0426ade41e_7)</u>

**Item 4.01.&nbsp;&nbsp;&nbsp;&nbsp;Changes in Registrant's Certifying Accountant**

On, and effective as of, September 8, 2025, the Audit Committee (the "Committee") of the Board of Directors of Lam Research Corporation (the "Company") approved the dismissal of Ernst & Young LLP ("EY") as the Company's independent registered public accounting firm. Also on, and effective as of, September 8, 2025, the Committee approved the engagement of KPMG LLP ("KPMG") as the Company's independent registered public accounting firm for the Company's fiscal year 2026 audit.

The audit reports of EY on the Company's financial statements as of and for the fiscal years ended June 29, 2025 and June 30, 2024 did not contain an adverse opinion or a disclaimer of opinion, nor were they qualified or modified as to uncertainty, audit scope or accounting principles.

During the fiscal years ended June 29, 2025 and June 30, 2024 and the subsequent interim period through September 8, 2025, there were: (i) no "disagreements" (within the meaning of Item 304(a)(1)(iv) of Regulation S-K and the related instructions) between the Company and EY on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedures, which disagreements, if not resolved to EY's satisfaction, would have caused EY to make reference thereto in its reports; and (ii) no "reportable events" (within the meaning of Item 304(a)(1)(v) of Regulation S-K).

The Company provided EY with a copy of this current report on Form 8-K and requested that EY furnish the Company with a letter addressed to the Securities and Exchange Commission stating whether EY agreed with the statements made by the Company set forth above. A copy of EY's letter, dated September 11, 2025, is attached as Exhibit 16.1 to this Current Report on Form 8-K.

During the fiscal years ended June 29, 2025 and June 30, 2024 and the subsequent interim period through September 8, 2025, neither the Company, nor anyone on behalf of the Company, consulted KPMG regarding: (i) the application of accounting principles to a specified transaction (either completed or proposed), or the type of audit opinion that might be rendered on the Company's financial statements, and neither a written report nor oral advice was provided to the Company that KPMG concluded was an important factor considered by the Company in reaching a decision as to the accounting, auditing or financial reporting issue; or (ii) any matter that was either the subject of a "disagreement" (within the meaning of Item 304(a)(1)(iv) of Regulation S-K) or a "reportable event" (within the meaning of Item 304(a)(1)(v) of Regulation S-K).

**Item 9.01.&nbsp;&nbsp;&nbsp;&nbsp;Financial Statements and Exhibits**

*(d) Exhibits*

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| | |
|:---|:---|
| 16.1 | <u>[Letter from Ernst & Young LLP to the Securities and Exchange Commission, dated as of September](lrcx_exx161xseptember112025.htm)[11](lrcx_exx161xseptember112025.htm)[, 2025](lrcx_exx161xseptember112025.htm)</u> |
| 104 | Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document |

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<u>[**Table of Contents**](#i1ea87843a5db4cff81839f0426ade41e_7)</u>

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
| Date: | September 11, 2025 | **LAM RESEARCH CORPORATION** |
| | | (Registrant) |
| | | /s/ Douglas R. Bettinger |
| | | **Douglas R. Bettinger** |
| | | **Executive Vice President, Chief Financial Officer** |

---

## Exhibit 16.1

**Exhibit 16.1**

September 11, 2025

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Commissioners:

We have read Item 4.01 of Form 8-K dated September 11, 2025, of Lam Research Corporation and are in agreement with the statements contained in the first sentence in the first paragraph and the second, third and fourth paragraphs on page 1 therein. We have no basis to agree or disagree with other statements of the registrant contained therein.

/s/ Ernst & Young LLP

<br>