ARM HOLDINGS PLC - Officer Transaction Filing

This filing details a transaction by Jason Child, Chief Financial Officer of ARM HOLDINGS PLC. On May 20, 2026, Mr. Child disposed of 31,920 ordinary shares at a price of $226.54 per share, resulting in a post-transaction holding of 174,232 shares. The transaction was executed as part of a Rule 10b5-1 trading plan adopted on May 30, 2025. The ordinary shares are held in the form of American Depositary Shares (ADSs), with each ADS representing one ordinary share.