Allegro Micro (NASDAQ: ALGM) SVP stock withheld for RSU tax event

Rhea-AI Filing Summary

ALLEGRO MICROSYSTEMS, INC. senior vice president of worldwide sales Richard Madormo reported a routine tax-related share disposition. On this Form 4, 6,498 shares of common stock were surrendered at $32.58 per share to cover taxes due upon the vesting of previously granted restricted stock units. After this withholding, Madormo directly holds 60,311 shares of Allegro common stock, indicating he retains a substantial equity stake while settling the tax obligation tied to his equity compensation.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Madormo Richard

(Last) (First) (Middle)

955 PERIMETER ROAD

(Street)

MANCHESTER NEW HAMPSHIRE 03103

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ALLEGRO MICROSYSTEMS, INC. [ ALGM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Worldwide Sales

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/24/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/24/2026		D		6,498(1)	D	$32.58	60,311	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares withheld to cover taxes due upon the vesting of restricted stock units that were previously granted by the Issuer.

	/s/ Raymond Myer, Attorney-in-Fact for Richard Madormo	03/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did ALGM SVP Richard Madormo report on this Form 4?

Richard Madormo reported a tax-related share disposition. The filing shows 6,498 shares of Allegro common stock were surrendered to the issuer at $32.58 per share to cover taxes triggered by the vesting of previously granted restricted stock units.

Was the ALGM insider transaction an open-market sale of shares?

No, the transaction was not an open-market sale. A footnote explains the 6,498 shares were withheld by Allegro to cover taxes due upon vesting of restricted stock units, making this a routine compensation-related tax event rather than a discretionary market sale.

How many ALGM shares does Richard Madormo hold after this Form 4 transaction?

Madormo holds 60,311 Allegro shares after the transaction. The Form 4 states his direct ownership of common stock stands at 60,311 shares following the tax withholding, indicating he maintains a meaningful ongoing equity position in ALLEGRO MICROSYSTEMS, INC.

What role does Richard Madormo hold at ALLEGRO MICROSYSTEMS, INC. (ALGM)?

Richard Madormo serves as SVP, Worldwide Sales at Allegro. The Form 4 identifies him as an officer of the company with the title “SVP, Worldwide Sales,” providing context that this tax-related share withholding is tied to executive equity compensation.

What type of security was involved in Richard Madormo’s ALGM Form 4 filing?

The transaction involved Allegro common stock. The filing specifies that the 6,498 shares surrendered to cover taxes were shares of common stock, arising from the vesting of restricted stock units previously granted by ALLEGRO MICROSYSTEMS, INC.