LAM RESEARCH CORP — Director's Dealing 2026

Feb 5, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: LAM RESEARCH CORP (LRCX)
CIK: 0000707549
Period of Report: 2026-02-03

Reporting Person: Bettinger Douglas R (Chief Financial Officer & EVP)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-03	Common Stock	M	76920	—	Acquired	1064157	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-03	Market-based Performance Restricted Stock Unit	$0	M	51280	Disposed		Common Stock (51280)	Direct

Footnotes

F1: On 03/01/2023, the Reporting Person received a grant of 51,280 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.