ARM Holdings (ARM) CCO sells 4,200 shares at about $344 each

Rhea-AI Filing Summary

ARM Holdings PLC Chief Commercial Officer William Abbey sold 4,200 Ordinary Shares in an open-market transaction. The sale occurred on May 28, 2026 at a weighted average price of $343.81 per share, with individual trade prices ranging from $343.80 to $344.09. After this transaction, Abbey directly holds 27,129 Ordinary Shares. The shares are held in the form of American Depositary Shares, with each ADS representing one Ordinary Share.

Insider Trade Summary

Net Seller: 4,200 shares ($1,444,002)

Net Sell 1 txn

Insider Abbey William

Role Chief Commercial Officer

Sold 4,200 shs ($1.44M)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	4,200	$343.81	$1.44M

Holdings After Transaction: Ordinary Shares — 27,129 shares (Direct, null)

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. Represents weighted average sales price. The shares were sold at prices ranging from $343.80 to $344.09. 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.

Key Figures

Shares sold: 4,200 shares Average sale price: $343.81 per share Price range: $343.80–$344.09 +1 more

4 metrics

Shares sold 4,200 shares Ordinary Shares sold on May 28, 2026

Average sale price $343.81 per share Weighted average price for 4,200 shares sold

Price range $343.80–$344.09 Range of prices for the reported sales

Shares held after 27,129 shares Direct Ordinary Share holdings after the sale

Key Terms

Ordinary Shares, American Depositary Shares, weighted average sales price, open-market sale

4 terms

Ordinary Shares financial

"Ordinary Shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary 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"). Each ADS represents 1 Ordinary Share."

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.

weighted average sales price financial

"Represents weighted average sales price. The shares were sold at prices ranging from $343.80 to $344.09."

open-market sale financial

"transaction_action: "open-market sale" for the 4,200 Ordinary Shares"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

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Form 4 Insider Transactions: What Each Field Means →

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)
05/28/2026

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
Ordinary Shares(1)	05/28/2026		S		4,200	D	$343.81(2)	27,129	D

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

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. Represents weighted average sales price. The shares were sold at prices ranging from $343.80 to $344.09. 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.

Remarks:

	/s/ George Kanelos, as Attorney-in-Fact for William Abbey	06/01/2026
	** 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)

FAQ

What insider transaction did ARM (ARM) disclose for William Abbey?

ARM reported that Chief Commercial Officer William Abbey sold 4,200 Ordinary Shares in an open-market transaction. The trade occurred on May 28, 2026 and reduced his direct holdings to 27,129 Ordinary Shares.

At what price did William Abbey sell ARM (ARM) shares?

William Abbey sold 4,200 ARM Ordinary Shares at a weighted average price of $343.81 per share. Individual trades were executed between $343.80 and $344.09, according to the disclosed pricing range.

How many ARM (ARM) shares does William Abbey hold after the sale?

Following the reported sale, William Abbey directly holds 27,129 Ordinary Shares of ARM. This figure reflects his position after disposing of 4,200 shares in the May 28, 2026 open-market transaction.

What type of security did William Abbey sell in ARM (ARM)?

The transaction involved ARM Ordinary Shares, which are held in the form of American Depositary Shares. Each ADS represents one Ordinary Share, so the 4,200 shares sold correspond to 4,200 ADS-equivalent units.

Was William Abbey’s ARM (ARM) transaction a market sale or another type?

The filing identifies William Abbey’s transaction as an open-market sale of non-derivative Ordinary Shares. It is coded as a sale, not an option exercise, gift, tax withholding, or derivative-related transaction.