Ronald D. Fisher - 18 Mar 2026 Form 3 Insider Report for ARM HOLDINGS PLC /UK (ARM)

Role: Director
Signature: /s/ George Kanelos, as Attorney-in-Fact for Ronald Fisher
Issuer symbol: ARM
Transactions as of: 18 Mar 2026
Net transactions value: $0
Form type: 3
Filing time: 18 Mar 2026, 16:53:13 UTC
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
FISHER RONALD D	Director	C/O ARM HOLDINGS PLC, 110 FULBOURN ROAD, CAMBRIDGE, UNITED KINGDOM	/s/ George Kanelos, as Attorney-in-Fact for Ronald Fisher	18 Mar 2026	0001065266

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	ARM	Ordinary Shares						35,615	18 Mar 2026	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	ARM	Restricted Stock Units							18 Mar 2026	Ordinary Shares	2,130		Direct	F1, F2, F3
holding	ARM	Restricted Stock Units							18 Mar 2026	Ordinary Shares	2,141		Direct	F1, F3, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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	The restricted stock units ("RSUs") vested in full on May 15, 2025, but the ADSs have not been delivered pursuant to Mr. Fisher's election to defer delivery until the date of termination of his service on the Board of Directors.
F3	Each RSU represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS.
F4	The RSUs will vest in full on May 15, 2026, subject to continued service to Arm Holdings plc, but the ADSs will not be delivered until the date of termination of his service on the Board of Directors pursuant to his election to defer such delivery.

Remarks:

Exhibit 24 - Power of Attorney