ARM HOLDINGS PLC /UK (ARM) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-19 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ARM HOLDINGS PLC /UK (ARM) CIK: 0001973239 --- Reporting Owner --- Name: Collins Spencer CIK: 0001999165 Role: Officer (Chief Legal Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Ordinary Shares Date: 2026-05-19 | Code: S (Open market sale) Shares: -40,941 | Price: $215.00 Total Value: $8,802,315.00 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F1] Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. --- Footnotes (Complete Index) --- F1: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. --- Signature --- /s/ /s/ George Kanelos, as Attorney-in-Fact for Spencer Collins (2026-05-21)