Insider Transaction Report - ARM HOLDINGS PLC /UK

This filing details insider transactions for ARM HOLDINGS PLC /UK, specifically focusing on Chief Accounting Officer Laura Kathleen Bartels. On May 15, 2026, there were several transactions involving Ordinary Shares and Restricted Stock Units (RSUs). Ms. Bartels acquired 3588, 862, and 2308 Ordinary Shares through RSU vesting, indicated by transaction code "M" and acquired disposed code "A", with post-transaction shares increasing accordingly. Additionally, 3383 Ordinary Shares were disposed of to cover tax withholding requirements upon RSU vesting, with a price per share of 209.16. Several RSU awards were granted and vested, with details on vesting schedules and underlying ordinary share conversions. The transactions are reported under Form 4, with the signature date being May 19, 2026.