LAM RESEARCH CORP Chief Legal Officer Stock Transactions

On October 27, 2025, Harter Ava, the Chief Legal Officer of LAM RESEARCH CORP, engaged in several stock transactions. Ava sold 3,000 shares of common stock at $157.48 per share, acquired 6,010 shares at $77.039 per share, and then sold 6,010 shares at $157.46 per share. Additionally, Ava disposed of 6,010 employee stock options with an exercise price of $77.039 per share, which will vest in three equal installments starting March 1, 2025. Following these transactions, Ava owns 56,786.455 shares of common stock and 12,020 employee stock options. The transactions were reported in a Form 4 filing with the SEC.