144 0001998912 XXXXXXXX LIVE 0001973239 ARM HOLDINGS PLC /UK 001-41800 110 FULBOURN ROAD CAMBRIDGE X0 CB1 9NJ 44 1223 400 400 Haas Rene A. Officer Director American Depositary Shares Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

6152 827400.15 1056513738 11/28/2025 NASDAQ American Depositary Shares 03/01/2024 Restricted Stock Vesting Issuer N 6152 03/01/2024 Compensation N Rene Haas

110 Fulbourn Road Cambridge X0 CB1 9NJ

American Depositary Shares 09/30/2025 6152 862347.54 Rene Haas

110 Fulbourn Road Cambridge X0 CB1 9NJ

American Depositary Shares 10/31/2025 6152 1042207.73 11/28/2025 06/11/2025 /s/ Paul Lostoski, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Rene Haas