Arm Holdings (ARM) director details share and RSU holdings

Rhea-AI Filing Summary

Arm Holdings plc director Ronald D. Fisher filed an initial ownership report showing his equity position in the company. He directly holds 35,615 Ordinary Shares, which are represented by American Depositary Shares where each ADS equals one Ordinary Share.

He also holds two blocks of restricted stock units covering 2,130 and 2,141 underlying Ordinary Shares. One RSU grant vested in full on May 15, 2025, and another is scheduled to vest on May 15, 2026, with delivery of the ADSs deferred until his board service ends.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider FISHER RONALD D

Role Director

Type	Security	Shares	Price	Value
holding	Restricted Stock Units	--	--	--
holding	Restricted Stock Units	--	--	--
holding	Ordinary Shares	--	--	--

Holdings After Transaction: Restricted Stock Units — 2,130 shares (Direct); Ordinary Shares — 35,615 shares (Direct)

Footnotes (1)

1. 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. 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. Each RSU represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. 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.

Understanding Insider Trading Forms →

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

FISHER RONALD D

(Last) (First) (Middle)

C/O ARM HOLDINGS PLC

110 FULBOURN ROAD

(Street)

CAMBRIDGE CB1 9NJ

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
ARM HOLDINGS PLC /UK [ ARM ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares(1)	35,615	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(2)	(2)	Ordinary Shares(1)	2,130	(3)	D
Restricted Stock Units	(4)	(4)	Ordinary Shares(1)	2,141	(3)	D

Explanation of Responses:

1. 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.

2. 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.

3. Each RSU represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS.

4. 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

	/s/ George Kanelos, as Attorney-in-Fact for Ronald Fisher	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does Ronald D. Fisher’s Form 3 filing for ARM show?

The Form 3 shows Ronald D. Fisher’s initial ownership in Arm Holdings plc. He reports 35,615 Ordinary Shares plus restricted stock units tied to additional Ordinary Shares, establishing his baseline equity position as a director.

How many Arm Holdings ORD shares does Ronald D. Fisher directly hold?

Ronald D. Fisher directly holds 35,615 Ordinary Shares of Arm Holdings plc. These are held in the form of American Depositary Shares, with each ADS representing one Ordinary Share according to the filing footnotes.

What restricted stock units does Ronald D. Fisher report for ARM?

He reports two blocks of restricted stock units over 2,130 and 2,141 underlying Ordinary Shares. Each RSU represents the right to receive one Ordinary Share, delivered as an ADS after vesting and subject to his deferral elections.

How are Arm Holdings ADSs related to its Ordinary Shares in this filing?

The filing states that Arm Holdings Ordinary Shares are held as American Depositary Shares. Each ADS represents one Ordinary Share, so Fisher’s reported Ordinary Share and RSU amounts correspond directly to equal numbers of ADSs.

When do Ronald D. Fisher’s ARM restricted stock units vest and settle?

One RSU grant vested in full on May 15, 2025, and another will vest on May 15, 2026 if service continues. However, delivery of the related ADSs is deferred until his service on the Board of Directors ends.