LAM RESEARCH CORP

We are making these proxy materials available to you in connection with the solicitation of proxies by the Board of Directors (the “Board”) of Lam Research Corporation (“Lam Research,” “Lam,” the “Company,” “we,” “our,” or “us”) for use at our 2026 Annual Meeting of Stockholders (the “annual meeting”) to be held virtually on November 3, 2026 at 9:30 a.m. Pacific Time, or at any other time following adjournment or postponement thereof. You are invited to participate in the annual meeting and to vote on the proposals described in this proxy statement (the “proxy statement”). The proxy materials are first being made available or mailed to our stockholders on or about September 24, 2026. The following summary does not contain all of the information that you should consider. You should read the entire proxy statement carefully before voting.