Lam Research (LRCX)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-02 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: LAM RESEARCH CORP (LRCX) CIK: 0000707549 --- Reporting Owner --- Name: Varadarajan Seshasayee CIK: 0001707827 Role: Officer (Senior Vice President) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-09-02 | Code: S (Open market sale) Shares: -20,000 | Price: $291.32 Total Value: $5,826,400.00 Shares Owned After: 205,546 | Ownership: D (Direct) Footnotes: [F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 4, 2026. [F2] The amount reported includes shares subject to unvested restricted stock units. [Transaction #2] Security: Common Stock Date: 2026-09-02 | Code: M (Exercise of derivative) Shares: +12,270 | Price: $59.88 Total Value: $734,739.87 Shares Owned After: 217,816 | Ownership: D (Direct) Footnotes: [F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 4, 2026. [F2] The amount reported includes shares subject to unvested restricted stock units. [Transaction #3] Security: Common Stock Date: 2026-09-02 | Code: S (Open market sale) Shares: -12,270 | Price: $291.32 Total Value: $3,574,496.40 Shares Owned After: 205,546 | Ownership: D (Direct) Footnotes: [F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 4, 2026. [F2] The amount reported includes shares subject to unvested restricted stock units. [Transaction #4] Security: Common Stock Date: 2026-09-02 | Code: M (Exercise of derivative) Shares: +27,480 | Price: $30.03 Total Value: $825,306.84 Shares Owned After: 233,026 | Ownership: D (Direct) Footnotes: [F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 4, 2026. [F2] The amount reported includes shares subject to unvested restricted stock units. [Transaction #5] Security: Common Stock Date: 2026-09-02 | Code: S (Open market sale) Shares: -27,480 | Price: $291.32 Total Value: $8,005,473.60 Shares Owned After: 205,546 | Ownership: D (Direct) Footnotes: [F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 4, 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: 2026-09-02 | Code: M (Exercise of derivative) Shares: -12,270 | Price: $0.00 Exercise Price: $59.88 Exercisable: N/A | Expires: 2028-03-01 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F3] The stock options will become exercisable in three equal installments on 03/01/2022, 03/01/2023, and 03/01/2024. [Transaction #2] Security: Employee Stock Option (Right to Buy) Date: 2026-09-02 | Code: M (Exercise of derivative) Shares: -27,480 | Price: $0.00 Exercise Price: $30.03 Exercisable: N/A | Expires: 2027-03-02 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F4] 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) --- Footnotes (Complete Index) --- F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 4, 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 03/01/2022, 03/01/2023, and 03/01/2024. F4: 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 (2026-09-03)