Lam Research (LRCX)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-02-04 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: LAM RESEARCH CORP (LRCX) CIK: 0000707549 --- Reporting Owner --- Name: ARCHER TIMOTHY CIK: 0001343600 Role: Officer (President and CEO) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-02-04 | Code: M (Exercise of derivative) Shares: +271,530 | Price: $0.00 Shares Owned After: 1,203,939 | Ownership: D (Direct) Footnotes: [F1] On 03/01/2023, the Reporting Person received a grant of 181,020 Market-based Performance Restricted Stock Units vesting between 0% and 150% on 03/01/2026. The vesting of this award is based on the total return stock price performance of Lam Research shares (assuming reinvestment of dividends) relative to the market price performance of the PHLX Semiconductor Sector Total Return Index, comparing the 50-trading day trailing average closing price over the performance period from 02/01/2023 through 01/31/2026. [F2] The amount reported includes shares subject to unvested restricted stock units. --- Derivative Transactions --- [Transaction #1] Security: Market-based Performance Restricted Stock Unit Date: 2026-02-04 | Code: M (Exercise of derivative) Shares: -181,020 | Price: $0.00 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F3] The Market-based performance restricted stock units will vest between 0% and 150% on 03/01/2026. The performance of this award is based on the Lam Research Total Shareholder Return performance relative to the PHLX Semiconductor Total Return Index Total Shareholder Return during the performance period of 02/01/2023 through 01/31/2026. [F3] The Market-based performance restricted stock units will vest between 0% and 150% on 03/01/2026. The performance of this award is based on the Lam Research Total Shareholder Return performance relative to the PHLX Semiconductor Total Return Index Total Shareholder Return during the performance period of 02/01/2023 through 01/31/2026. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) [Holding #2] Security: Common Stock Ownership: I (Indirect) --- Footnotes (Complete Index) --- F1: On 03/01/2023, the Reporting Person received a grant of 181,020 Market-based Performance Restricted Stock Units vesting between 0% and 150% on 03/01/2026. The vesting of this award is based on the total return stock price performance of Lam Research shares (assuming reinvestment of dividends) relative to the market price performance of the PHLX Semiconductor Sector Total Return Index, comparing the 50-trading day trailing average closing price over the performance period from 02/01/2023 through 01/31/2026. F2: The amount reported includes shares subject to unvested restricted stock units. F3: The Market-based performance restricted stock units will vest between 0% and 150% on 03/01/2026. The performance of this award is based on the Lam Research Total Shareholder Return performance relative to the PHLX Semiconductor Total Return Index Total Shareholder Return during the performance period of 02/01/2023 through 01/31/2026. --- Signature --- /s/ Marta Woods by Power of Attorney (2026-02-05)