DYKSTRA KAREN E 4

What Happened Karen E. Dykstra, a director of Arm Holdings plc (ARM), was granted 1,531 restricted stock units (RSUs) on May 15, 2026. The award is reported as an acquisition (derivative) at $0.00 per unit; no cash changed hands. Each RSU represents the right to receive one Ordinary Share in the form of an American Depositary Share (ADS) upon vesting. The RSUs vest in full on May 15, 2027, subject to her continued service, and delivery of the ADSs is deferred until termination of her board service per her election.

Key Details

• Transaction date: May 15, 2026; reported on Form 4 filed May 19, 2026.
• Instrument: 1,531 RSUs (derivative), reported acquisition price $0.00 (award).
• Vesting/delivery: RSUs vest in full on May 15, 2027 (subject to continued service); ADS delivery postponed until termination of board service under Dykstra’s deferral election.
• Share form: Ordinary shares are held as ADSs; each ADS = 1 Ordinary Share.
• Shares owned after transaction: Not disclosed in the filing.
• Timeliness: Form 4 was filed four days after the transaction; Form 4s are generally due within 2 business days, so this filing appears later than the typical deadline.

Context RSU grants to directors are routine compensation and do not involve an immediate open-market purchase or sale. Because these are time-vesting RSUs with deferred delivery, they do not reflect an immediate change in market exposure. There was no cash outlay or sale reported in this filing.