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: 2026-04-27 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: LAM RESEARCH CORP (LRCX) CIK: 0000707549 --- Reporting Owner --- Name: Harter Ava CIK: 0001642415 Role: Officer (Chief Legal Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-04-27 | Code: M (Exercise of derivative) Shares: +6,010 | Price: $77.04 Total Value: $463,004.39 Shares Owned After: 59,215.455 | Ownership: D (Direct) Footnotes: [F1] The amount reported includes shares subject to unvested restricted stock units. [Transaction #2] Security: Common Stock Date: 2026-04-27 | Code: S (Open market sale) Shares: -6,010 | Price: $258.66 Total Value: $1,554,546.60 Shares Owned After: 53,205.455 | Ownership: D (Direct) Footnotes: [F1] The amount reported includes shares subject to unvested restricted stock units. --- Derivative Transactions --- [Transaction #1] Security: Employee Stock Option (Right to Buy) Date: 2026-04-27 | Code: M (Exercise of derivative) Shares: -6,010 | Price: $0.00 Exercisable: N/A | Expires: 2031-08-05 Shares Owned After: 6,010 | Ownership: D (Direct) Footnotes: [F2] 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 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 (2026-04-27)