Haas Rene A. 4

What Happened
Rene A. Haas, CEO of ARM Holdings plc (ARM), had performance-based restricted stock units (RSUs) vest on May 15, 2026. A total of 265,643 ADSs (each ADS = 1 ordinary share) were recorded as acquired from three vested award tranches. To satisfy tax withholding on the vesting, 143,316 shares were disposed (withheld) at $209.16 per ADS for aggregate proceeds/withholding of $29,975,975. The net increase from vesting after withholding was 122,327 ADSs.

Key Details

• Transaction dates: vesting and withholding occurred on 2026-05-15; Form 4 filed 2026-05-19 (filed within the standard 2-business-day window).
• Prices and value: 143,316 ADSs withheld/disposed at $209.16 each; total value $29,975,975 (~$29.98M). Acquisitions listed without per-share price (RSUs are awards).
• Shares acquired from vesting: 265,643 ADSs (sum of 51,952; 51,691; 162,000 grants). Net new shares retained after withholding: 122,327 ADSs.
• Footnotes: awards were performance-based RSUs granted on May 1, 2025; May 13, 2024; and May 23, 2023 and vested following certification of performance by the Remuneration Committee. ADSs represent ordinary shares 1:1. F6 indicates ordinary shares were withheld to satisfy tax withholding requirements on vesting.
• Transaction codes: A = award/acquisition (RSU vesting); F = shares withheld/disposed for taxes.
• Filing timeliness: filed May 19, 2026 for a May 15, 2026 vesting — within the typical 2-business-day SEC Form 4 deadline.

Context

• This was not an open-market sale for investment reasons but a routine tax-withholding disposition on RSU vesting (common for equity compensation).
• The filing shows grant/vesting and withholding activity; it does not state broader changes to Haas’s total holdings prior to these transactions.