Form 4 Filing for ARM HOLDINGS PLC

This Form 4 filing details a transaction by Collins Spencer, Chief Legal Officer of ARM HOLDINGS PLC. On May 19, 2026, Spencer acquired 40,941 ordinary shares at a price of $215.0 per share. Following this transaction, the post-transaction shares owned by Spencer amount to 0. The shares are held directly. The filing also clarifies that the ordinary shares are represented by American Depositary Shares (ADSs), with each ADS representing one ordinary share.