Exhibit 99.1 FOR IMMEDIATE RELEASE Lam Research Corporation Reports Financial Results for the Quarter Ended September 28, 2025 FREMONT, Calif., October 22, 2025 - Lam Research Corporation (the "Company," "Lam," "Lam Research") today announced financial results for the quarter ended September 28, 2025 (the "September 2025 quarter"). Highlights for the September 2025 quarter were as follows: Key Financial Data for the Quarters Ended September 28, 2025 and June 29, 2025 (in thousands, except per-share data, pe ...