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• Sohail U. Ahmed and Michael R. Cannon notified Lam Research's Board of their retirement decisions on August 24, 2026.
• Both directors will retire effective November 2, 2026.
• Ahmed served approximately seven years, including on audit, compensation and human resources, and innovation and technology committees.
• Cannon served approximately 16 years, including 12 years on the audit committee and seven years as chair of the nominating and governance committee.

5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements

• U.S. GAAP diluted EPS was $1.81, up 24.8% from $1.45 in the prior quarter; non-GAAP diluted EPS was $1.82, up 23.8% from $1.47.
• U.S. GAAP gross margin was 51.7% of revenue and operating margin was 37.4%; non-GAAP gross margin was 52.0% and operating margin was 38.4%.
• Cash, cash equivalents, and restricted cash increased to $5.60 billion from $4.77 billion at the end of the March 2026 quarter.
• For the September 2026 quarter, Lam guides revenue of $8.10 billion ± $400 million, non-GAAP gross margin of 52.0% ± 1%, non-GAAP operating margin of 39.5% ± 1%, and non-GAAP diluted EPS of $2.15 ± $0.15.

2.02 Results of Operations and Financial Condition · 9.01 Financial Statements and Exhibits

• GAAP diluted EPS was $1.45, up 15% sequentially; non-GAAP diluted EPS was $1.47, up 16% sequentially.
• GAAP gross margin was 49.8% of revenue, operating margin 35.0%; non-GAAP gross margin 49.9%, operating margin 35.0%.
• Cash, cash equivalents, and restricted cash decreased to $4.77 billion from $6.20 billion at the end of the prior quarter.
• For the June 2026 quarter, Lam guides revenue of $6.60 billion ± $400 million and non-GAAP diluted EPS of $1.65 ± $0.15.

2.02 Results of Operations and Financial Condition · 9.01 Financial Statements and Exhibits

• Dr. Devgan joined the Innovation and Technology Committee and will receive compensation consistent with the company's non-employee director policies.
• Patrick J. Lord, Ph.D., will retire as chief operating officer effective March 6, 2026, after more than two decades with Lam Research and Novellus.
• Seshasayee (Sesha) Varadarajan, age 51, was appointed executive vice president and chief operating officer, effective March 6, 2026, succeeding Dr. Lord.
• Karthik Rammohan will assume an expanded role as Senior Vice President, Global Operations and Enterprise Solutions, according to the press release.

5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements · 9.01 Financial Statements and Exhibits

• U.S. GAAP gross margin was 49.6%, operating income margin 33.9%, and diluted EPS $1.26.
• Non-GAAP gross margin was 49.7%, operating income margin 34.3%, and diluted EPS $1.27.
• For the March 2026 quarter, Lam guides revenue of $5.70 billion ± $300 million and non-GAAP diluted EPS of $1.35 ± $0.10.
• Cash and equivalents decreased to $6.2 billion from $6.7 billion, primarily due to capital return and capex.

2.02 Results of Operations and Financial Condition · 9.01 Financial Statements and Exhibits

• At the November 4, 2025 annual meeting, stockholders approved the 2025 Stock Incentive Plan with 93.79% of votes cast in favor.
• All 11 director nominees were elected, with support ranging from 80.80% (Michael R. Cannon) to 99.88% (Ita M. Brennan).
• The advisory 'Say on Pay' proposal was approved with 90.83% of votes cast in favor.
• A stockholder proposal to allow special shareholder meetings was not approved, receiving only 41.36% of votes cast.

3.03 Material Modification to Rights of Security Holders · 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements · 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year · 5.07 Submission of Matters to a Vote of Security Holders · 9.01 Financial Statements and Exhibits

• U.S. GAAP diluted EPS was $1.24, down 8% sequentially; non-GAAP diluted EPS was $1.26, down 5% sequentially.
• U.S. GAAP gross margin was 50.4% of revenue, and non-GAAP gross margin was 50.6%.
• For the December 2025 quarter, Lam guides revenue of $5.20 billion ± $300 million and non-GAAP diluted EPS of $1.15 ± $0.10.
• Cash, cash equivalents, and restricted cash increased to $6.7 billion at quarter-end from $6.4 billion.

2.02 Results of Operations and Financial Condition · 9.01 Financial Statements and Exhibits

• Effective the same date, the Committee engaged KPMG LLP as the independent auditor for the fiscal year 2026 audit.
• EY's audit reports for fiscal years ended June 29, 2025 and June 30, 2024 were unqualified, with no adverse opinion or modification.
• No disagreements or reportable events occurred between Lam Research and EY during the covered periods.
• EY provided a letter to the SEC dated September 11, 2025, agreeing with the company's statements, attached as Exhibit 16.1.

4.01 Changes in Registrant's Certifying Accountant · 9.01 Financial Statements and Exhibits