=== 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: Abbey William
CIK: 0001945497
Role: Officer (Chief Commercial Officer)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Ordinary Shares
Date: 2026-05-19 | Code: S (Open market sale)
Shares: -10,887 | Price: $224.14
Total Value: $2,440,212.18
Shares Owned After: 43,353 | 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.
[F2] Represents weighted average sales price. The shares were sold at prices ranging from $224.11 to $224.43. The reporting person will provide upon request, to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
[Transaction #2]
Security: Ordinary Shares
Date: 2026-05-20 | Code: S (Open market sale)
Shares: -5,069 | Price: $257.18
Total Value: $1,303,645.42
Shares Owned After: 38,284 | 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.
[F3] Represents weighted average sales price. The shares were sold at prices ranging from $257.15 to $257.35. The reporting person will provide upon request, to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
--- 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.
F2: Represents weighted average sales price. The shares were sold at prices ranging from $224.11 to $224.43. The reporting person will provide upon request, to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F3: Represents weighted average sales price. The shares were sold at prices ranging from $257.15 to $257.35. The reporting person will provide upon request, to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
--- Signature ---
/s/ /s/ George Kanelos, as Attorney-in-Fact for William Abbey (2026-05-21)
