LAM RESEARCH CORP

Rule 10b5-1 and Non-Rule 10b5-1 Trading Arrangements

During the Company’s fiscal quarter ended June 29, 2025, except for the following arrangements, none of the Company’s directors or officers adopted, modified, orterminated a trading arrangement for the purchase or sale of the Company’s common stock that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) (a “Rule 10b5-1 Trading Arrangement”) or a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K):

•On June 11, 2025, Vahid Vahedi, the Senior Vice President, Chief Technology and Sustainability Officer of the Company, adopted a Rule 10b5-1 Trading Arrangement. Dr. Vahedi’s Rule 10b5-1 Trading Arrangement provides for the potential sale of up to 52,190 shares of the Company’s common stock pursuant to the terms of the Rule 10b5-1 Trading Arrangement. Dr. Vahedi’s Rule 10b5-1 Trading Arrangement has a termination date of January 30, 2026.

The Rule 10b5-1 Trading Arrangement contains pricing conditions that preclude or limit the sale of shares below predetermined minimum prices. The Rule 10b5-1 Trading Arrangement will terminate on the earlier of: (a) its respective termination date indicated

Lam Research Corporation 2025 10-K 70 above; (b) execution of all trades or expiration of all the orders relating to such trades under the Rule 10b5-1 Trading Arrangement; or (c) such date as the Rule 10b5-1 Trading Arrangement is otherwise terminated according to its terms.