Lam Research (LRCX)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-09 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: LAM RESEARCH CORP (LRCX) CIK: 0000707549 --- Reporting Owner --- Name: ARCHER TIMOTHY CIK: 0001343600 Role: Officer (President and CEO) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-09-09 | Code: M (Exercise of derivative) Shares: +30,000 | Price: $30.03 Total Value: $900,990.00 Shares Owned After: 1,105,966 | Ownership: D (Direct) Footnotes: [F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026. [F2] The amount reported includes shares subject to unvested restricted stock units. [Transaction #2] Security: Common Stock Date: 2026-09-09 | Code: S (Open market sale) Shares: -30,000 | Price: $319.26 Total Value: $9,577,800.00 Shares Owned After: 1,075,966 | Ownership: D (Direct) Footnotes: [F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026. [F2] The amount reported includes shares subject to unvested restricted stock units. --- Derivative Transactions --- [Transaction #1] Security: Employee Stock Option (Right to Buy) Date: 2026-09-09 | Code: M (Exercise of derivative) Shares: -30,000 | Price: $0.00 Exercise Price: $30.03 Exercisable: N/A | Expires: 2027-03-02 Shares Owned After: 31,400 | Ownership: D (Direct) Footnotes: [F3] The stock options will become exercisable in three equal installments on 03/02/2021, 03/02/2022, and 03/02/2023. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) [Holding #2] Security: Common Stock Ownership: I (Indirect) --- Footnotes (Complete Index) --- F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026. F2: The amount reported includes shares subject to unvested restricted stock units. F3: The stock options will become exercisable in three equal installments on 03/02/2021, 03/02/2022, and 03/02/2023. --- Signature --- /s/ Marta Woods by Power of Attorney (2026-09-10)