LAM RESEARCH CORP (LRCX) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-03-02 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: LAM RESEARCH CORP (LRCX) CIK: 0000707549 --- Reporting Owner --- Name: Bettinger Douglas R CIK: 0001469469 Role: Officer (Chief Financial Officer & EVP) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-03-02 | Code: M (Exercise of derivative) Shares: +16,620 | Price: $59.88 Total Value: $995,222.22 Shares Owned After: 1,044,651 | Ownership: D (Direct) Footnotes: [F1] The amount reported includes shares subject to unvested restricted stock units. [Transaction #2] Security: Common Stock Date: 2026-03-02 | Code: M (Exercise of derivative) Shares: +37,980 | Price: $54.06 Total Value: $2,053,084.86 Shares Owned After: 1,082,631 | Ownership: D (Direct) Footnotes: [F1] The amount reported includes shares subject to unvested restricted stock units. [Transaction #3] Security: Common Stock Date: 2026-03-02 | Code: M (Exercise of derivative) Shares: +11,710 | Price: $30.03 Total Value: $351,686.43 Shares Owned After: 1,094,341 | Ownership: D (Direct) Footnotes: [F1] The amount reported includes shares subject to unvested restricted stock units. [Transaction #4] Security: Common Stock Date: 2026-03-02 | Code: S (Open market sale) Shares: -40,329 | Price: $230.22 Total Value: $9,284,542.38 Shares Owned After: 1,054,012 | Ownership: D (Direct) Footnotes: [F2] The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $230.07 .00 to $230.39, inclusive [F1] The amount reported includes shares subject to unvested restricted stock units. --- Derivative Transactions --- [Transaction #1] Security: Employee Stock Option (Right to Buy) Date: 2026-03-02 | Code: M (Exercise of derivative) Shares: -16,620 | Price: $0.00 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: 2026-03-02 | Code: M (Exercise of derivative) Shares: -37,980 | Price: $0.00 Exercisable: N/A | Expires: 2029-03-01 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F4] The stock options will become exercisable in three equal installments on 03/01/2023, 03/01/2024 and 03/01/2024. [Transaction #3] Security: Employee Stock Option (Right to Buy) Date: 2026-03-02 | Code: M (Exercise of derivative) Shares: -11,710 | Price: $0.00 Exercisable: N/A | Expires: 2027-03-02 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F5] The stock options will become exercisable in three equal installments on 03/02/2021, 03/02/2022, and 03/02/2023. --- Footnotes (Complete Index) --- F1: The amount reported includes shares subject to unvested restricted stock units. F2: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $230.07 .00 to $230.39, inclusive 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 03/01/2023, 03/01/2024 and 03/01/2024. F5: 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 (2026-03-03)