ARM (ARM) CFO Jason Child sells 21,280 shares in planned trade

Rhea-AI Filing Summary

ARM Holdings' Chief Financial Officer Jason Child sold 21,280 Ordinary Shares in an open-market transaction. The sale occurred at a price of $180.00 per share on April 22, 2026. After this sale, he continues to hold 153,426 Ordinary Shares directly.

The Ordinary Shares are held in the form of American Depositary Shares, with each ADS representing one Ordinary Share. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan adopted by the reporting person, indicating the sale was scheduled in advance.

Insider Trade Summary 10b5-1

Net Seller: 21,280 shares ($3,830,400)

Net Sell 1 txn

Insider Child Jason

Role Chief Financial Officer

Sold 21,280 shs ($3.83M)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	21,280	$180.00	$3.83M

Holdings After Transaction: Ordinary Shares — 153,426 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. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 30, 2025.

Key Figures

Shares sold: 21,280 shares Sale price: $180.00 per share Shares held after transaction: 153,426 shares +1 more

4 metrics

Shares sold 21,280 shares Open-market sale on April 22, 2026

Sale price $180.00 per share Price for Ordinary Shares sold

Shares held after transaction 153,426 shares Direct holdings after April 22, 2026 sale

Security type Ordinary Shares / ADSs Each ADS represents 1 Ordinary Share

Key Terms

Ordinary Shares, American Depositary Shares, Rule 10b5-1 trading plan, 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.

Rule 10b5-1 trading plan regulatory

"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open-market sale financial

"transaction_action": "open-market sale""

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.

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).

X

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^*

Child Jason

(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 Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/22/2026

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)	04/22/2026		S(2)		21,280	D	$180	153,426	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. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 30, 2025.

Remarks:

	/s/ George Kanelos, as Attorney-in-Fact for Jason Child	04/23/2026
	** 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 Jason Child?

ARM disclosed that Chief Financial Officer Jason Child completed an open-market sale of 21,280 Ordinary Shares at $180.00 per share. This transaction was reported on a Form 4 and reflects a direct ownership change in the company’s equity.

How many ARM (ARM) shares does Jason Child hold after this sale?

Following the reported sale, Jason Child holds 153,426 Ordinary Shares of ARM directly. This remaining stake shows he continues to have a substantial equity interest in the company even after the open-market disposition disclosed in the Form 4.

At what price were the ARM (ARM) shares sold in the Form 4 filing?

The Form 4 shows Jason Child’s open-market sale of ARM Ordinary Shares at an average price of $180.00 per share. This per-share price is the transaction value used to calculate the proceeds from the 21,280 shares sold on that trade date.

Was Jason Child’s ARM (ARM) share sale under a Rule 10b5-1 plan?

Yes. A footnote explains the transaction was effected under a Rule 10b5-1 trading plan adopted by Jason Child. Such plans pre-schedule trades, indicating the timing of this sale was determined in advance rather than decided opportunistically.

What type of security did Jason Child sell in ARM (ARM)?

Jason Child sold ARM Ordinary Shares, which are held in the form of American Depositary Shares (ADSs). Each ADS represents one Ordinary Share, so the 21,280 shares reported correspond to the same number of ADSs in the U.S. market.