(Mark One) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGEACT OF1934 For the quarterly period endedSeptember28, 2025or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGEACT OF1934 For the transition period fromtoCommission file number0-12933___________________________________________________________ LAM RESEARCH CORPORATION (Exact name of registrant as specified in its charter)___________________________________________________________ 94-2634797 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) (Nasdaq Global Select Market) Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d)of the Securities Exchange Act of1934 during the preceding 12months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject to such filingrequirements for the past 90days.Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit suchfiles).Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, oran emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growthcompany” in Rule12b-2 of the Exchange Act. If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with anynew or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule12b-2 of the Exchange Act).Yes☐No☒ LAM RESEARCH CORPORATION TABLE OF CONTENTS PART I. Financial Information Item1.Financial Statements (Unaudited):Condensed Consolidated Statements of Operations for the three months ended September 28, 2025, andSeptember 29, 20243Condensed Consolidated Statements of Comprehensive Income for the three months ended September 28,2025, and September 29, 20244Condensed Consolidated Balance Sheets as of September 28, 2025, and June 29, 20255Condensed Consolidated Statements of Cash Flows for the three months ended September 28, 2025, andSeptember 29, 20246Condensed Consolidated Statements of Stockholders’ Equity for the three months ended September 28, 2025,and September 29, 20247Notes to Condensed Consolidated Financial Statements8Item2.Management’s Discussion and Analysis of Financial Condition and Results of Operations16Item3.Quantitative and Qualitative Disclosures about Market Risk22Item4.Controls and Procedures23 PART II. Other Information Item1.Legal Proceedings24Item1A.Risk Factors24Item2.Unregistered Sales of Equity Securities and Use of Proceeds37Item3.Defaults Upon Senior Securities37Item4.Mine Safety Disclosures37Item5.Other Information37Item6.Exhibits38Signatures39 PART I. FINANCIAL INFORMATION LAM RESEARCH CORPORATIONCONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS(in thousands, except per share data)(unaudited) LAM RESEARCH CORPORATIONCONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME(in thousands)(unaudited) Lam Research Corporation 2025 Q3 10-Q4 See Notes to Condensed Consolidated Financial Statements LAM RESEARCH CORPORATIONNOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTSSeptember28, 2025(Unaudited) NOTE 1 —BASIS OF PRESENTATION The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. generallyaccepted accounting principles (“GAAP”) for interim financial information and the instructions to Article10 of RegulationS-X. Accordingly,they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion ofmanagement, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have beenincluded. The accompanying unaudited Condensed Consolidated Financial Statements should be read in conjunction with the auditedConsolidated Financial Statements of Lam Research Corporation (“Lam Research” or the “Company”) for the fiscal year ended June29,2025, which are included in the Company’s Annual Report on Form 10-K as of and for the year ended June29, 2025 (the “2025 Form 10-K”). The condensed consolidated financial statements include the accounts of Lam Research and its wholly-owned subsidiaries. Allintercompany accounts and transactions have been eliminated in consolidation.The Company’s reporting period is a 52/53-week fiscalyear. The Company’s current fiscal year will end June 28, 2026 and includes 52weeks.The quarters ended September28, 2025