Arm Holdings grants CCO 17,288 RSUs

Arm’s Chief Commercial Officer received a time-vested equity award that increases his RSU-based ownership to 65,270 Ordinary Share equivalents.

Rhea-AI Filing Summary

ARM HOLDINGS PLC /UK (symbol: ARM) is the issuer of record for a Form 4 filing submitted to the SEC. Abbey William reported acquisition or exercise transactions in this Form 4 filing.

ARM HOLDINGS PLC (ARM) reported that Chief Commercial Officer William Abbey received a grant of 17,288 Restricted Stock Units on September 14, 2026. Each RSU represents one Ordinary Share held in the form of an ADS, bringing his directly held RSU-based Ordinary Share equivalent to 65,270 shares after the grant.

The award vests over time: 50% of the RSUs vest on August 15, 2028 and the remaining 50% on August 15, 2029, in each case subject to his continued service to Arm Holdings plc.

Insider Trade Summary

Grant/Award: 17,288 shares

Grant/Award 1 txn

Insider Abbey William

Role Chief Commercial Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units F1, F2, F3	17,288	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 65,270 contracts (Direct)

Footnotes (3)

1. F1. Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS.
2. F2. This RSU award was granted effective September 14, 2026. 50% will vest on each of August 15, 2028 and August 15, 2029, subject to continued service to Arm Holdings plc.
3. F3. 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.

Key Figures

RSUs granted: 17,288 RSUs Holdings after transaction: 65,270 shares First vesting tranche: 50% of 17,288 RSUs +1 more

4 metrics

RSUs granted 17,288 RSUs Restricted Stock Units granted to William Abbey on September 14, 2026

Holdings after transaction 65,270 shares Total RSU-based Ordinary Share equivalents held directly after the RSU grant

First vesting tranche 50% of 17,288 RSUs Scheduled to vest on August 15, 2028, subject to continued service

Second vesting tranche 50% of 17,288 RSUs Scheduled to vest on August 15, 2029, subject to continued service

Key Terms

Restricted Stock Units, Ordinary Shares, American Depositary Shares, ADSs

4 terms

Restricted Stock Units financial

"Each restricted stock unit ("RSU") represents the right to receive"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Ordinary Shares financial

"Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares")"

Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.

American Depositary Shares financial

"are held in the form of American Depositary Shares ("ADSs")"

American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.

ADSs financial

"Each ADS represents 1 Ordinary Share"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did ARM’s Chief Commercial Officer report on this Form 4?

William Abbey reported a grant of 17,288 Restricted Stock Units on September 14, 2026. The RSUs are a compensation-related equity award, not a market purchase or sale, and increase his RSU-based Ordinary Share equivalent holdings to 65,270 shares after the grant.

How many ARM (ARM) RSUs does William Abbey hold after this transaction?

After the September 14, 2026 RSU grant of 17,288 units, William Abbey holds RSU-based Ordinary Share equivalents totaling 65,270 shares directly. Each RSU corresponds to one Ordinary Share held in the form of an American Depositary Share.

What are the vesting terms of William Abbey’s new RSU award at ARM?

The RSU award granted effective September 14, 2026 vests in two equal tranches: 50% on August 15, 2028 and 50% on August 15, 2029, in each case subject to William Abbey’s continued service to Arm Holdings plc.

Does this ARM Form 4 involve any open-market buying or selling of shares?

No. The Form 4 reports a grant of 17,288 Restricted Stock Units as compensation. There are no reported open-market purchases or sales; the transaction is classified as a grant, award, or other acquisition of derivative securities.

How are ARM Ordinary Shares represented in this Form 4 for William Abbey?

The filing states that ARM Ordinary Shares, nominal value 0.001 GBP per share, are held in the form of American Depositary Shares (ADSs), and that each ADS represents one Ordinary Share. Each RSU corresponds to one such Ordinary Share.

Was the ARM RSU grant to William Abbey made under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not marked as affirming a plan for this transaction, and the footnotes do not state that the RSU grant was made pursuant to a Rule 10b5-1 or similar pre-arranged trading arrangement.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 09/16/2026 - 05:27 PM Accepted by SEC EDGAR 09/16/2026 - 05:26 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Abbey William

(Last) (First) (Middle)

C/O ARM HOLDINGS PLC

110 FULBOURN ROAD

(Street)

CAMBRIDGE CB1 9NJ

(City) (State) (Zip)

UNITED KINGDOM

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/14/2026

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	09/14/2026		A		17,288		(2)	(2)	Ordinary Shares(3)	17,288	$0	65,270	D

Explanation of Responses:

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

2. This RSU award was granted effective September 14, 2026. 50% will vest on each of August 15, 2028 and August 15, 2029, subject to continued service to Arm Holdings plc.

3. 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.

Remarks:

	/s/ George Kanelos, as Attorney-in-Fact for William Abbey	09/16/2026
	** 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 4 (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 4: SEC 1474 (03-26)