Charlotte Claire Eaton - 15 May 2026 Form 4 Insider Report for ARM HOLDINGS PLC /UK (ARM)

Reporting relationship: Chief People Officer
Issuer ticker: ARM
Reported as of: 15 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 19 May 2026, 17:13:14 UTC
Prior SEC filing: 18 Mar 2026
Next SEC filing: 21 May 2026
Source filing: View source filing
Reporting owner signature: /s/ George Kanelos, as Attorney-in-Fact for Charlotte Claire Eaton

Key filing fact

Charlotte Claire Eaton filed Form 4 for ARM HOLDINGS PLC /UK (ARM) on 19 May 2026.

Key facts

This page summarizes Charlotte Claire Eaton's Form 4 filing for ARM HOLDINGS PLC /UK (ARM).
5 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 19 May 2026, 17:13.

Change

Previous filing in this sequence was filed on 18 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002102441 Primary reporting owner

Eaton Charlotte Claire

Relationship: Chief People Officer
Address: C/O ARM HOLDINGS PLC, 110 FULBOURN ROAD, CAMBRIDGE, UNITED KINGDOM
Signature: /s/ George Kanelos, as Attorney-in-Fact for Charlotte Claire Eaton
Signature date: 19 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ARM transaction

Ordinary Shares

Award

Transaction value
Shares: +5,612
Change %: +52%
Price
Shares after: 16,377
Date: 15 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

ARM transaction

Ordinary Shares

Options Exercise

Transaction value
Shares: +2,200
Change %: +13%
Price
Shares after: 18,577
Date: 15 May 2026
Ownership: Direct
Footnotes: F1, F3, F4

ARM transaction

Ordinary Shares

Tax liability

Transaction value
Shares: -3,672
Change %: -20%
Price: $209.16^*
Shares after: 14,905
Date: 15 May 2026
Ownership: Direct
Footnotes: F1, F5

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ARM transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +8,044
Change %: +6.8%
Price: $0.000000^*
Shares after: 125,705
Date: 15 May 2026
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 8,044
Exercise price
Footnotes: F3, F6

ARM transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -2,200
Change %: -1.8%
Price: $0.000000^*
Shares after: 123,505
Date: 15 May 2026
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 2,200
Exercise price
Footnotes: F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote 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.

Footnote F2

Represents performance-based restricted stock units granted on May 1, 2025, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee (the "Remuneration Committee") of the Board of Directors of the Company.

Footnote F3

Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS.

Footnote F4

This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company.

Footnote F5

Ordinary Shares withheld to satisfy tax withholding requirements on vesting of RSUs.

Footnote F6

This RSU award was granted effective May 15, 2026. 30% will vest on each of May 15, 2027, and May 15, 2028, and the remaining 40% will vest on May 15, 2029, subject to continued service to the Company.