Allegro Microsystems (ALGM) CFO reports tax-related share withholding on RSU vesting

Rhea-AI Filing Summary

ALLEGRO MICROSYSTEMS, INC. executive Derek D’Antilio, EVP, CFO & Treasurer, reported an automatic share disposition tied to equity compensation. On this Form 4, 17,808 shares of common stock were withheld at $42.38 per share to cover taxes due when previously granted restricted stock units vested. After this tax-withholding event, he held 226,771 shares of Allegro common stock directly. This reflects routine administration of stock-based compensation rather than an open-market sale.

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^*

D'Antilio Derek

(Last) (First) (Middle)

955 PERIMETER ROAD

(Street)

MANCHESTER NH 03103

(City) (State) (Zip)

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)
	EVP, CFO & Treasurer

3. Date of Earliest Transaction (Month/Day/Year)
02/13/2026

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

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

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

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	02/13/2026		F		17,808(1)	D	$42.38	226,771	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 Derek P. D'Antilio	02/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What did ALGM executive Derek D’Antilio report in this Form 4 filing?

Derek D’Antilio reported a tax-related share disposition, where 17,808 Allegro Microsystems shares were withheld to cover taxes on vested restricted stock units. This was an automatic, compensation-related event, not an open-market stock sale initiated for investment reasons.

How many ALGM shares were involved in Derek D’Antilio’s tax-withholding transaction?

The transaction involved 17,808 shares of Allegro Microsystems common stock withheld at $42.38 per share. These shares were surrendered to satisfy tax obligations arising from the vesting of previously granted restricted stock units, rather than being sold on the open market for cash proceeds.

Does this ALGM Form 4 show Derek D’Antilio buying or selling shares on the market?

The Form 4 does not show an open-market buy or sell. Instead, it records 17,808 Allegro Microsystems shares being withheld to pay taxes on vested restricted stock units, a common administrative step in equity compensation programs, rather than a discretionary trading decision.

How many ALGM shares does Derek D’Antilio hold after this reported transaction?

After the tax-withholding disposition, Derek D’Antilio directly held 226,771 shares of Allegro Microsystems common stock. This post-transaction balance reflects his remaining direct ownership following the automatic share withholding used to satisfy the tax liability from RSU vesting.

What is the transaction code "F" in Derek D’Antilio’s ALGM Form 4?

Transaction code "F" indicates payment of an exercise price or tax liability by delivering securities. In this case, 17,808 Allegro Microsystems shares were withheld to cover taxes due when restricted stock units vested, rather than representing a voluntary sale into the market.