# EDGAR Filing Document

**Accession Number:** 0001533913
**File Stem:** 0001973239-26-000037
**Filing Date:** 2026-3
**Character Count:** 9244
**Document Hash:** 939fd519b28f6264353bf5df9fa383bf
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001973239-26-000037.hdr.sgml**: 20260415

**ACCESSION NUMBER**: 0001973239-26-000037

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 4

**CONFORMED PERIOD OF REPORT**: 20260318

**FILED AS OF DATE**: 20260318

**DATE AS OF CHANGE**: 20260318

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Child Jason
- **CENTRAL INDEX KEY:** 0001533913

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41800
- **FILM NUMBER:** 26770311

**MAIL ADDRESS:**
- **STREET 1:** C/O ARM INC.
- **STREET 2:** 120 ROSE ORCHARD WAY
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95134
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ARM HOLDINGS PLC /UK
- **CENTRAL INDEX KEY:** 0001973239
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **STATE OF INCORPORATION:** X0
- **FISCAL YEAR END:** 0331

**BUSINESS ADDRESS:**
- **STREET 1:** 110 FULBOURN ROAD
- **CITY:** CAMBRIDGE
- **STATE:** X0
- **ZIP:** CB1 9NJ
- **BUSINESS PHONE:** 44 1223 400 400

**MAIL ADDRESS:**
- **STREET 1:** 110 FULBOURN ROAD
- **CITY:** CAMBRIDGE
- **STATE:** X0
- **ZIP:** CB1 9NJ

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Arm Holdings Ltd
- **DATE OF NAME CHANGE:** 20230411

## Ex-24

![](armholdings-section16apo001.jpg)

POWER OF ATTORNEY The undersigned hereby appoints each of George Kanelos, Katy Roosevelt, Danielle McKenna and any duly appointed Corporate Secretary of Arm Holdings plc (the "Company"), or any of them signing singly, and with full power of substitution, the undersigned's true and lawful attorney-in-fact to: (1) execute for and on behalf of the undersigned, in the undersigned's capacity as an officer and/or director of the Company, Forms 3, 4, and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and the rules thereunder and any other forms or reports the undersigned may be required to file in connection with the undersigned's ownership, acquisition, or disposition of securities of the Company; (2) seek or obtain, as the undersigned's representative and on the undersigned's behalf, information on transactions in the Company's securities from any third party, including brokers, employee benefit plan administrators and trustees, and the undersigned hereby authorizes any such person to release any such information to each of the undersigned's attorneys-in-fact appointed by this Power of Attorney and approves and ratifies any such release of information; (3) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4, or 5 or any amendment or amendments thereto, and timely file such form with the U.S. Securities and Exchange Commission and any stock exchange or similar authority; and (4) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion. The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in- fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Exchange Act and the rules thereunder. This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of and

------

![](armholdings-section16apo002.jpg)

2 transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact. IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 30th day of January, 2026. Signature Jason Child /s/ Jason Child

------

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Child Jason<br><sub>(Last) (First) (Middle)</sub><br>c/o Arm Holdings plc<br>110 Fulbourn Road<br><sub>(Street)</sub><br>Cambridge,  CB1 9NJ<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>ARM HOLDINGS PLC /UK [ ARM ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-03-18 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [ ] 10% Owner<br>[X] Officer (give title below)   [ ] Other (specify below)<br>_Chief Financial Officer_ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Ordinary Shares<sup>(1)</sup> | 195986 | D |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Restricted Stock Units | <sup>(2)</sup> | <sup>(2)</sup> | Ordinary Shares<sup>(1)</sup> | 108015 | <sup>(3)</sup> | D |  |
| Restricted Stock Units | <sup>(4)</sup> | <sup>(4)</sup> | Ordinary Shares<sup>(1)</sup> | 15568 | <sup>(3)</sup> | D |  |
| Restricted Stock Units | <sup>(5)</sup> | <sup>(5)</sup> | Ordinary Shares<sup>(1)</sup> | 10843 | <sup>(3)</sup> | D |  |

---

### 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.

(2) This restricted stock unit ("RSU") award was granted on December 9, 2025. 30% will vest on each of November 15, 2026, and November 15, 2027, and the remaining 40% will vest on November 15, 2028, subject to continued service to Arm Holdings plc (the "Company").

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

(4) This RSU award was granted on May 1, 2025. 30% will vest on each of May 15, 2026 and May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company.

(5) This RSU award of 15,490 was granted on May 13, 2024, of which 30% already vested on May 15, 2025. 30% will vest on May 15, 2026 and 40% will vest on May 15, 2027, subject to continued service to the Company.

**Remarks:**
Exhibit 24 - Power of Attorney

**Signature:** /s/ George Kanelos, as Attorney-in-Fact for Jason Child  
**Date:** 2026-03-18

### Remarks:

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.**