Form 144: Insider Sale Notice for ALGM

Form 144 filing for ALGM: The filing lists reported dispositions by Sharon Briansky of 27,873 common shares on 12/10/2025 and 9,258 common shares on 02/17/2026.

Rhea-AI Filing Summary

Form 144 filing for ALGM: The filing lists reported dispositions by Sharon Briansky of 27,873 common shares on 12/10/2025 and 9,258 common shares on 02/17/2026. The filing also records a Restricted Stock Vesting event of 9,727 common shares on 02/27/2026.

FAQ

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

What transactions does the ALGM Form 144 show?

The filing shows two sales by Sharon Briansky and a restricted stock vesting. It reports sale of 27,873 shares on 12/10/2025, sale of 9,258 shares on 02/17/2026, and a restricted stock vesting of 9,727 shares on 02/27/2026.

Who is the reporting person on the ALGM Form 144?

The filing names Sharon Briansky as the reporting person. The document lists her address and shows two dispositions of common shares on the dates 12/10/2025 and 02/17/2026, plus a restricted stock vesting on 02/27/2026.

How many shares were sold in the ALGM Form 144 transactions?

The disclosed sales total 37,131 common shares across two transactions. Specifically, 27,873 shares were sold on 12/10/2025 and 9,258 shares on 02/17/2026, as reported in the filing.

Does the ALGM filing show any vesting or compensation-related shares?

Yes. The filing records a Restricted Stock Vesting event. It lists 9,727 common shares vesting under a compensation arrangement on 02/27/2026 in the Securities To Be Sold section.

Where were the ALGM shares held according to the filing?

The filing references Fidelity Brokerage Services LLC at 900 Salem Street, Smithfield, RI. It shows an entry with 340,445.00 tied to that brokerage in the Securities Information section of the Form 144 content.

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

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Accepted by SEC EDGAR 03/02/2026 - 01:21 PM EST 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	0001897651
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	ALLEGRO MICROSYSTEMS, INC.
SEC File Number	001-39675
Address of Issuer	955 PERIMETER ROAD MANCHESTER NEW HAMPSHIRE 03103
Phone	(603) 626-2300
Name of Person for Whose Account the Securities are To Be Sold	Briansky Sharon
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

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
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	9727	340445.00	185290870	03/02/2026	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 *
Common	02/27/2026	Restricted Stock Vesting	Issuer			9727	02/27/2026	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
Sharon Briansky 955 Perimeter Road Manchester NH 03103	Common	12/10/2025	27873	836190.00
Sharon Briansky 955 Perimeter Road Manchester NH 03103	Common	02/17/2026	9258	384762.48

144: Remarks and Signature

Remarks
Date of Notice	03/02/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	08/02/2025
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/ Audrey McMillen, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Sharon Briansky
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)