What are Young Sohn’s Arm (ARM) share holdings after these transactions?

After the reported transactions, Young Sohn directly holds 2,396 Ordinary Shares. These are held as American Depositary Shares, each representing one Ordinary Share, reflecting his post-transaction equity position disclosed in the Form 4 summary.

Arm (ARM) director Young Sohn nets shares after RSU vesting and new grant

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Arm Holdings director Young Sohn reported equity compensation activity involving restricted stock units and ordinary shares. On May 15, 2026, 2,141 RSUs were exercised into 2,141 Ordinary Shares held as ADSs, and 429 Ordinary Shares were withheld to cover tax obligations on the RSU vesting. Following these transactions, Sohn directly holds 2,396 Ordinary Shares. On the same date, he received a new grant of 1,531 RSUs that will vest in full on May 15, 2027, with ADS delivery deferred until his service on the Board of Directors ends.

Insider Trade Summary

2,141 shares exercised/converted

Mixed 4 txns

Insider SOHN YOUNG

Role null

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	2,141	$0.00	--
Grant/Award	Restricted Stock Units	1,531	$0.00	--
Exercise	Ordinary Shares	2,141	$0.00	--
Tax Withholding	Ordinary Shares	429	$209.16	$90K

Holdings After Transaction: Restricted Stock Units — 0 shares (Direct, null); Ordinary Shares — 2,825 shares (Direct, null)

Footnotes (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, 2026. Each RSU represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Ordinary Shares withheld to satisfy tax withholding requirements on vesting of RSUs. The RSUs will vest in full on May 15, 2027, subject to continued service to Arm Holdings plc, but the ADSs will not be delivered until the date of termination of Mr. Sohn's service on the Board of Directors pursuant to his election to defer such delivery.

Key Figures

RSUs exercised: 2,141 shares Tax withholding shares: 429 shares Shares held after transactions: 2,396 shares +4 more

7 metrics

RSUs exercised 2,141 shares RSUs converted to Ordinary Shares on May 15, 2026

Tax withholding shares 429 shares Ordinary Shares withheld to satisfy tax on RSU vesting

Shares held after transactions 2,396 shares Ordinary Shares directly owned following May 15, 2026 activity

New RSU grant 1,531 RSUs Award granted May 15, 2026, vesting May 15, 2027

RSU exercise price $0.00 per share RSU conversion to Ordinary Shares on May 15, 2026

Tax withholding reference price $209.16 per share Price per Ordinary Share used for tax-withholding disposition

ADS to Ordinary Share ratio 1 ADS = 1 share Each ADS represents one Ordinary Share of Arm

Key Terms

Restricted Stock Units, American Depositary Shares, tax withholding requirements, Exercise or conversion of derivative security, +1 more

5 terms

Restricted Stock Units financial

"The restricted stock units ("RSUs") vested in full on May 15, 2026."

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.

American Depositary Shares financial

"Ordinary shares ... 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.

tax withholding requirements financial

"Ordinary Shares withheld to satisfy tax withholding requirements on vesting of RSUs."

Exercise or conversion of derivative security financial

"transaction_code_description": "Exercise or conversion of derivative security""

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

Form 4 Insider Transactions: What Each Field Means →

05/19/2026 - 04:53 PM

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^*

SOHN YOUNG

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Ordinary Shares⁽¹⁾	05/15/2026		M		2,141⁽²⁾	A	⁽³⁾	2,825	D
Ordinary Shares⁽¹⁾	05/15/2026		F⁽⁴⁾		429	D	$209.16	2,396	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	⁽³⁾	05/15/2026		M			2,141	⁽²⁾	⁽²⁾	Ordinary Shares	2,141	$0	0	D
Restricted Stock Units	⁽³⁾	05/15/2026		A		1,531		⁽⁵⁾	⁽⁵⁾	Ordinary Shares	1,531	$0	1,531	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, 2026.

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

4. Ordinary Shares withheld to satisfy tax withholding requirements on vesting of RSUs.

5. The RSUs will vest in full on May 15, 2027, subject to continued service to Arm Holdings plc, but the ADSs will not be delivered until the date of termination of Mr. Sohn's service on the Board of Directors pursuant to his election to defer such delivery.

Remarks:

	/s/ George Kanelos, as Attorney-in-Fact for Young Sohn	05/19/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What did Arm (ARM) director Young Sohn report in this Form 4?

Young Sohn reported routine equity compensation activity. On May 15, 2026, RSUs vested and converted into Ordinary Shares, some shares were withheld for taxes, and he received a new RSU grant subject to future vesting and service conditions.

How many Arm (ARM) shares did Young Sohn acquire through RSU exercises?

Sohn exercised 2,141 restricted stock units into 2,141 Ordinary Shares on May 15, 2026. These shares are held in the form of American Depositary Shares, with each ADS representing one Ordinary Share under Arm’s equity structure.

How many Arm (ARM) shares were withheld for taxes in this filing?

A total of 429 Ordinary Shares were withheld to satisfy tax withholding requirements upon RSU vesting. This tax-withholding disposition is not an open-market sale, but a share deduction to cover the related tax liability on the vested equity.

What new RSU award did Young Sohn receive from Arm (ARM)?

Sohn received a grant of 1,531 restricted stock units on May 15, 2026. These RSUs will vest in full on May 15, 2027, subject to his continued service, with the underlying ADSs delivered only when his Board service ends.

How do Arm (ARM) American Depositary Shares relate to Ordinary Shares?

Arm’s Ordinary Shares have a nominal value of 0.001 GBP and are held as American Depositary Shares. Each ADS represents one Ordinary Share, providing a direct one-to-one relationship between the ADS trading instrument and the underlying equity.