ARM insider files Form 144 to sell American Depositary Shares

ARM filing reports a Form 144 notice for proposed sales of American Depositary Shares by Rene Haas.

Rhea-AI Filing Summary

ARM filing reports a Form 144 notice for proposed sales of American Depositary Shares by Rene Haas. The filing lists prior sales of ADS on 11/28/2025 (827,400.15), 12/31/2025 (678,956.89) and 01/30/2026 (653,938.87), and references restricted stock vesting on 03/01/2024.

Insights

Securities Compliance Officer

Form 144 filed reporting proposed ADS sales by Rene Haas and prior ADS dispositions.

The filing lists American Depositary Shares tied to a restricted stock vesting event dated 03/01/2024; it records three prior ADS sales on 11/28/2025, 12/31/2025, and 01/30/2026 with amounts shown.

These entries are procedural notices required for compliance with resale rules. Subsequent Form 4/144 amendments or broker reports would confirm actual transaction timing and volumes.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did ARM's Form 144 disclose?

The filing discloses a Form 144 notice for proposed sales of American Depositary Shares by Rene Haas. It lists prior ADS sales on 11/28/2025, 12/31/2025, and 01/30/2026 with amounts shown.

Who is the reporting person in the ARM Form 144?

The reporting person named is Rene Haas. The filing provides an address and lists prior ADS sales attributed to that individual on three dates with corresponding amounts.

Which securities are covered by the ARM Form 144?

The notice covers American Depositary Shares. The filing also references restricted stock vesting dated 03/01/2024 linked to compensation-related ADS issuance.

What prior ADS sales are shown in the filing?

The filing lists prior ADS sales on 11/28/2025 (827,400.15), 12/31/2025 (678,956.89), and 01/30/2026 (653,938.87), attributed to Rene Haas.

Does the Form 144 state how the proceeds will be used?

The filing does not attach a use-of-proceeds statement. It lists the securities type and prior sale amounts but does not state any recipient or use of sale proceeds within the provided excerpt.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 02/27/2026 - 10:20 AM Learn about SEC filing dates

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	0001998912
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ARM HOLDINGS PLC /UK
SEC File Number	001-41800
Address of Issuer	110 FULBOURN ROAD CAMBRIDGE UNITED KINGDOM CB1 9NJ
Phone	44 1223 400 400
Name of Person for Whose Account the Securities are To Be Sold	Haas Rene A.
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	Officer
Relationship to Issuer	Director

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	6152	776044.04	1056513738	02/27/2026	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	03/01/2024	Restricted Stock Vesting	Issuer			6152	03/01/2024	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
Rene Haas 110 Fulbourn Road Cambridge X0 CB1 9NJ	American Depositary Shares	11/28/2025	6152	827400.15
Rene Haas 110 Fulbourn Road Cambridge X0 CB1 9NJ	American Depositary Shares	12/31/2025	6152	678956.89
Rene Haas 110 Fulbourn Road Cambridge X0 CB1 9NJ	American Depositary Shares	01/30/2026	6152	653938.87

144: Remarks and Signature

Remarks
Date of Notice	02/27/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/11/2025
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	/s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Rene Haas
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)