ALGM Form 144: Notice to Sell 16,711 Shares

The filing is a Form 144 notice regarding ALGM securities held at Fidelity Brokerage Services LLC.

Rhea-AI Filing Summary

The filing is a Form 144 notice regarding ALGM securities held at Fidelity Brokerage Services LLC. The form lists 16,711 shares tied to restricted stock vesting and prior open-market purchases and gives a broker reference and an aggregate numeric value in the record. The filing enumerates vesting dates and specific share lots the holder intends to sell.

Insights

Equity Securities Specialist

Form 144 lists intent to sell 16,711 shares from vested restricted stock and prior purchases.

The filing records specific lots: restricted stock vesting on 08/04/2022, 08/03/2023, and 08/08/2024, plus open-market purchases on 02/03/2023 and 11/14/2023Fidelity Brokerage Services LLC as the broker.

Timing and method of actual sale are not stated here; subsequent trade reports or broker confirmations will show execution. Regulatory limits under Rule 144 may apply to any sale.

Key Figures

Shares listed: 16,711 shares Vested lot 1: 3,920 shares Vested lot 2: 8,363 shares +4 more

7 metrics

Shares listed 16,711 shares aggregate number shown in the filing record

Vested lot 1 3,920 shares Restricted Stock Vesting on <date>08/04/2022</date>

Vested lot 2 8,363 shares Restricted Stock Vesting on <date>08/03/2023</date>

Vested lot 3 3,838 shares Restricted Stock Vesting on <date>08/08/2024</date>

Open-market purchases 240 shares; 350 shares Purchases dated <date>02/03/2023</date> and <date>11/14/2023</date>

Numeric field present 759624.79 numeric value shown in the filing record

Reference outstanding figure 185,290,870 number present adjacent to <date>05/14/2026</date> in the record

Key Terms

Restricted Stock Vesting, Open Market Purchase, Rule 144

3 terms

Restricted Stock Vesting regulatory

"Restricted Stock Vesting | Issuer | 3,920 | 08/04/2022"

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.

Open Market Purchase market

"Open Market Purchase | Issuer | 240 | 02/03/2023"

An open market purchase is when a company buys its own shares on public stock exchanges the same way any investor would, rather than through a private deal. Investors care because these purchases reduce the number of shares available, can boost earnings per share and share price, signal that management thinks the stock is undervalued, and use company cash that might otherwise go to reinvestment or dividends — like a business quietly buying back its own tickets at the box office.

Rule 144 regulatory

"Form type indicated as 144 in the filing header"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

FAQ

What does ALGM's Form 144 list?

It lists an intent to sell specific Common shares totaling 16,711 shares. The form itemizes vested restricted-stock lots and prior open-market purchases held at Fidelity Brokerage Services LLC, including lot dates and share counts that the filer reports for public sale.

Does the Form 144 indicate the sale is completed for ALGM?

No, it reports an intent to sell but does not show completed trades. The form enumerates specific lots and broker details; execution, timing, and proceeds would appear in later trade reports or confirmations.

Which share lots are included on ALGM's Form 144?

Included are restricted-stock vesting lots of 3,920, 8,363, and 3,838 shares, plus open-market purchases of 240 and 350 shares. Each lot is tied to the dates shown on the filing.

Who is the broker listed on ALGM's Form 144?

The broker named is Fidelity Brokerage Services LLC at the address shown on the filing. The form lists the broker connection used to facilitate the intended resale under Rule 144 procedures.

What regulatory framework governs this ALGM filing?

This notice is submitted under Rule 144, which governs resale of restricted or controlled securities. The form discloses lots and broker info; any qualifying conditions under Rule 144 are not detailed in this excerpt.

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Accepted by SEC EDGAR 05/14/2026 - 02:10 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	0001784973
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	Lynch Susan D
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	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
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	16711	759624.79	185290870	05/14/2026	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	08/04/2022	Restricted Stock Vesting	Issuer			3920	08/04/2022	Compensation
Common	08/03/2023	Restricted Stock Vesting	Issuer			8363	08/03/2023	Compensation
Common	08/08/2024	Restricted Stock Vesting	Issuer			3838	08/08/2024	Compensation
Common	02/03/2023	Open Market Purchase	Issuer			240	02/03/2023	Cash
Common	11/14/2023	Open Market Purchase	Issuer			350	11/14/2023	Cash

* 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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	05/14/2026
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/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Susan Lynch
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)