[144] Arm Holdings plc American SEC Filing

Rhea-AI Filing Summary

Arm Holdings plc (ARM) Form 144 notice shows a proposed sale of 10,640 American Depositary Shares (ADS) through Fidelity Brokerage Services LLC on 09/10/2025, with an aggregate market value listed as $1,542,800.00. The ADS were acquired on 05/15/2024 via restricted stock vesting and were granted as compensation. The filer previously sold the same number of ADS on 09/05/2025, generating gross proceeds of $1,468,320.00. The filing lists total ADS outstanding as 1,056,513,738 and names the broker and sale venue as Fidelity Brokerage Services LLC and NASDAQ. The notice includes the standard representation that the seller is not aware of undisclosed material adverse information.

Positive

• Transaction disclosed under Rule 144, providing regulatory transparency
• ADS were acquired via restricted stock vesting and recorded as compensation, which is clearly stated

Negative

• None.

Insights

Securities Analyst

TL;DR: A routine insider sale of 10,640 ADS (~$1.54M) disclosed under Rule 144; size is immaterial versus total outstanding shares.

The Form 144 reports a proposed brokered sale of 10,640 ADS that were acquired through restricted stock vesting and recorded as compensation. Relative to the reported 1,056,513,738 ADS outstanding, this disposal represents a de minimis percentage of the float and is unlikely to be material to ARM's market capitalization or liquidity. The document also records a prior sale of the same amount five days earlier, with gross proceeds provided. This filing meets the disclosure requirement under Rule 144 and provides transparent details on acquisition date, nature of acquisition, broker, and estimated proceeds.

Corporate Governance Expert

TL;DR: The Form 144 appears compliant and includes required seller attestations; no governance red flags are evident from this notice alone.

The notice specifies the transaction type (restricted stock vesting), acquisition and proposed sale dates, broker information, and a seller representation regarding material undisclosed information. Those elements align with standard compliance expectations for public-company insider dispositions. Because the amount is small relative to total ADS outstanding and no insider trading plan date is provided, there is no clear governance concern raised by this single filing. Additional context (role of the seller, aggregate insider holdings) would be needed to assess any broader governance implications.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
American Depositary Shares	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	10640	1542800.00	1056513738	09/10/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
American Depositary Shares	05/15/2024	Restricted Stock Vesting	Issuer			10640	05/15/2024	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Jason E. Child 110 Fulbourn Road Cambridge X0 CB1 9NJ	American Depositary Shares	09/05/2025	10640	1468320.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What transaction does the ARM Form 144 disclose?

The form discloses a proposed sale of 10,640 ADS via Fidelity on 09/10/2025 with an aggregate market value of $1,542,800.00.

How and when were the ADS being sold acquired?

The ADS were acquired on 05/15/2024 through restricted stock vesting and the payment nature is listed as compensation.

Were there any recent sales of the same securities?

Yes. The filing reports a sale by Jason E. Child of 10,640 ADS on 09/05/2025 with gross proceeds of $1,468,320.00.

Which broker and exchange are named for the proposed sale?

The broker is listed as Fidelity Brokerage Services LLC and the exchange is NASDAQ.

How significant is this sale relative to ARM's outstanding ADS?

The filing lists 1,056,513,738 ADS outstanding; the 10,640 ADS reported represent a de minimis portion of that total.