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: No --- Issuer --- Name: LAM RESEARCH CORP (LRCX) CIK: 0000707549 --- Reporting Owner --- Name: Mayer Bethany CIK: 0001405693 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-09-09 | Code: S (Open market sale) Shares: -9,557 | Price: $314.74 Total Value: $3,007,970.18 Shares Owned After: 20,995 | Ownership: I (Indirect) | Nature: By Trust Footnotes: [F1] The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $314.08 to $314.99, inclusive --- Holdings --- [Holding #1] Security: Common Stock Ownership: D (Direct) Footnotes: [F2] The amount reported includes shares subject to unvested restricted stock units. --- Footnotes (Complete Index) --- F1: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $314.08 to $314.99, inclusive F2: The amount reported includes shares subject to unvested restricted stock units. --- Signature --- /s/ Marta Woods by Power of Attorney (2026-09-10)