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: 2026-03-04 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: 2026-03-04 | Code: M (Exercise of derivative) Shares: +51,270 | Price: $49.09 Total Value: $2,516,946.84 Shares Owned After: 1,105,282 | Ownership: D (Direct) Footnotes: [F1] The amount reported includes shares subject to unvested restricted stock units. [Transaction #2] Security: Common Stock Date: 2026-03-04 | Code: M (Exercise of derivative) Shares: +26,480 | Price: $98.15 Total Value: $2,599,091.44 Shares Owned After: 1,131,762 | Ownership: D (Direct) Footnotes: [F1] The amount reported includes shares subject to unvested restricted stock units. [Transaction #3] Security: Common Stock Date: 2026-03-04 | Code: S (Open market sale) Shares: -50,057 | Price: $224.03 Total Value: $11,214,269.71 Shares Owned After: 1,081,705 | 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 $223.90 to $224.39, 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: 2026-03-04 | Code: M (Exercise of derivative) Shares: -51,270 | Price: $0.00 Exercisable: N/A | Expires: 2030-03-01 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F3] The stock options will become exercisable in three equal installments on 03/01/2024, 03/01/2025 and 03/01/2026. [Transaction #2] Security: Employee Stock Option (Right to Buy) Date: 2026-03-04 | Code: M (Exercise of derivative) Shares: -26,480 | Price: $0.00 Exercisable: N/A | Expires: 2031-03-01 Shares Owned After: 13,240 | Ownership: D (Direct) Footnotes: [F4] The stock options will become exercisable in three equal installments on 03/01/2025, 03/01/2026, and 03/01/2027. --- 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 $223.90 to $224.39, inclusive F3: The stock options will become exercisable in three equal installments on 03/01/2024, 03/01/2025 and 03/01/2026. F4: The stock options will become exercisable in three equal installments on 03/01/2025, 03/01/2026, and 03/01/2027. --- Signature --- /s/ Marta Woods by Power of Attorney (2026-03-05)