ARM insider files to sell 40,941 ADS

Spencer Collins filed a Form 144 reporting a proposed sale of 40,941 American Depositary Shares following restricted stock vesting on 05/15/2026.

Rhea-AI Filing Summary

Spencer Collins filed a Form 144 reporting a proposed sale of 40,941 American Depositary Shares following restricted stock vesting on 05/15/2026. The sale is to be effected through Fidelity Brokerage Services LLC.

The notice shows prior sales of 51,961 ADS on 05/11/2026 with a reported dollar amount of $11,001,714.06.

Insights

Corporate Governance Analyst

Routine affiliate sale notice tied to vested compensation; timing and brokerage are specified.

The filing lists a proposed sale of 40,941 American Depositary Shares that vested on 05/15/2026 and identifies Fidelity Brokerage Services LLC as the broker. The record includes a prior sale of 51,961 ADS on 05/11/2026.

Cash‑flow treatment and whether sales are block or market trades are not stated in the excerpt; subsequent filings or trade reports would show execution details.

Key Figures

Proposed ADS to be sold: 40,941 shares ADS sold in prior 3 months: 51,961 shares Reported dollar amount (prior sale): $11,001,714.06 +1 more

4 metrics

Proposed ADS to be sold 40,941 shares restricted stock vesting on 05/15/2026

ADS sold in prior 3 months 51,961 shares sale on 05/11/2026

Reported dollar amount (prior sale) $11,001,714.06 associated with 51,961 ADS on 05/11/2026

Dollar figure listed near broker line $8,802,315.00 appears adjacent to broker/securities row dated 05/19/2026

Key Terms

Form 144, American Depositary Shares, Restricted Stock Vesting

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

American Depositary Shares financial

"American Depositary Shares | Fidelity Brokerage Services LLC"

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.

Restricted Stock Vesting financial

"Restricted Stock Vesting | Issuer | 05/15/2026"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

FAQ

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

What does the ARM Form 144 filed by Spencer Collins report?

It reports a proposed sale of 40,941 American Depositary Shares that vested on 05/15/2026, with brokerage via Fidelity Brokerage Services LLC. The filing also notes prior sales of 51,961 ADS on 05/11/2026.

Who is the broker handling the proposed ADS sale in the ARM Form 144?

The filing names Fidelity Brokerage Services LLC as the broker, located at 900 Salem Street, Smithfield, RI. The excerpt provides this broker identification without detailing execution method or timing.

How many ADS were sold by Spencer Collins in the prior three months for ARM?

The Form 144 shows prior sales of 51,961 American Depositary Shares on 05/11/2026, with an associated dollar figure of $11,001,714.06 in the presented excerpt.

Is the proposed sale in the ARM Form 144 tied to compensation?

Yes. The filing indicates the 40,941 ADS to be sold stem from a restricted stock vesting event on 05/15/2026, described in the excerpt as compensation‑related.

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

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Accepted by SEC EDGAR 05/19/2026 - 01:16 PM 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	0001999165
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	Collins Spencer
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	40941	8802315.00	1056513738	05/19/2026	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	05/15/2026	Restricted Stock Vesting	Issuer			40941	05/15/2026	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
Spencer Collins 110 Fulbourn Road Cambridge X0 CB1 9NJ	American Depositary Shares	05/11/2026	51961	11001714.06

144: Remarks and Signature

Remarks
Date of Notice	05/19/2026
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/ Eric Janiak, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Spencer Collins
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)