Form 4 Filing for ARM HOLDINGS PLC /UK

William Abbey, Chief Commercial Officer of ARM HOLDINGS PLC /UK, acquired 17,288 Restricted Stock Units (RSUs) on September 14, 2026. The RSUs were granted with a transaction price of $0.00 and represent the right to receive Ordinary Shares. The award vests in two tranches: 50% on August 15, 2028, and the remaining 50% on August 15, 2029, contingent upon continued service to the company. Following this transaction, Mr. Abbey now holds 65,270 shares. The filing was made on September 16, 2026.