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
of Incorporation)

(Commission
File Number)

(IRS Employer
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 ☐

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. ☐

Table of Contents


Item 4.01.	Changes in Registrant's Certifying Accountant	3
Item 9.01.	F inancial Stat ements and Exhibits	3
SIGNATURES		4

Table of Contents

Item 4.01. 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. Financial Statements and Exhibits

(d) Exhibits


16.1			Letter from Ernst & Young LLP to the Securities and Exchange Commission, dated as of September 11 , 2025
104			Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

Table of Contents

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

LAM RESEARCH CORP 8-K