LAM RESEARCH CORP

To assist you in reviewing the proposals to be acted upon at the annual meeting, we call your attention to the following summarized information about the Company, the proposals and voting recommendations, the Company’s director nominees, director nominee composition highlights, highlights of the directors’ key qualifications, skills and experiences, corporate governance, executive compensation, environmental, social, and governance (or “ESG”) matters, and the Lam 2025 Stock Incentive Plan. For more information about these topics, please review the complete proxy statement before voting. We also encourage you to read our latest annual report on Form 10-K, which is available atinvestor.lamresearch.com, and our latest Global Impact report, which is available at lamresearch.com/company/environmental-social-and-governance/. The content of any website or report referred to in this proxy statement is not a part of nor incorporated by reference in this proxy statement unless expressly noted. The Global Impact report

shall not be deemed soliciting material.

We use the terms “Lam Research,” “Lam,” the “Company,” “we,” “our,” and “us” in this proxy statement to refer to Lam Research Corporation, a Delaware corporation. We also use the term “Board” to refer to the Company’s Board of Directors.

On October 2, 2024, the Company effected a ten-for-one stock split of its common stock and a proportional increase in the number of authorized shares. All references made to share or per share amounts throughout this proxy statement have been retroactively adjusted to reflect the stock split.

This proxy statement contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include any statements that are not statements of historical fact, including statements regarding our environmental, social and governance plans and goals. Forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from the expectations expressed, including the risks and uncertainties described in our filings with the U.S. Securities and Exchange Commission (“SEC”), including specifically the Risk Factors described in our annual report on Form 10-K and our quarterly reports on Form 10-Q. You should not place undue reliance on forward-looking statements. We undertake no obligation to update any forward-looking statements.