144 0001405693 XXXXXXXX LIVE 0000707549 LAM RESEARCH CORP 000-12933 4650 CUSHING PKWY FREMONT CA 94538 5105720200 BETHANY MAYER Director COMMON CLASS A UBS Financial Services Inc

1000 Harbor Blvd 3rd Floor Weehawken NJ 07086

9557 3007970.18 1251321000 09/09/2026 NASDAQ COMMON CLASS A 10/31/2021 RSU VEST ISSUER N 5100 10/31/2021 N/A COMMON CLASS A 10/31/2023 RSU VEST ISSUER N 5630 10/31/2023 N/A COMMON CLASS A 10/31/2024 RSU VEST ISSUER N 2030 10/31/2024 N/A COMMON CLASS A 10/31/2025 RSU VEST ISSUER N 1622 10/31/2025 N/A Y BETHANY MAYER IS A DIRECTOR AT LRCX BUT THE JANTZEN/MAYER FAMILY 2002 TRUST IS THE SELLER. BETHANY IS TRUSTEE ON THE TRUST. 09/09/2026 /s/JOSEPH CASSIDY, for UBS Financial Services Inc, as attorney-in-fact for BETHANY MAYER