Allegro SVP shares withheld for RSU taxes

ALLEGRO MICROSYSTEMS, INC. senior vice president and general counsel Sharon Briansky reported a routine tax-withholding transaction related to equity compensation.

Rhea-AI Filing Summary

ALLEGRO MICROSYSTEMS, INC. senior vice president and general counsel Sharon Briansky reported a routine tax-withholding transaction related to equity compensation. On this Form 4, 13,942 shares of common stock were withheld at $43.10 per share to cover taxes due when previously granted restricted stock units and performance-vesting restricted stock units vested. After this non-market disposition, she directly holds 79,753 shares of Allegro common stock.

Insider Trade Summary

Exercise Price or Tax Liability: 13,942 shares

Exercise Price or Tax Liability 1 txn

Insider Briansky Sharon

Role SVP, GC and Secretary

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	13,942	$43.10	$601K

Holdings After Transaction: Common Stock — 79,753 shares (Direct)

Footnotes (1)

1. F1. Represents shares withheld to cover taxes due upon the vesting of restricted stock units and performance-vesting restricted stock units that were previously granted by the Issuer

Key Figures

Shares withheld for taxes: 13,942 shares Withholding price: $43.10 per share Shares held after transaction: 79,753 shares

3 metrics

Shares withheld for taxes 13,942 shares Tax-withholding disposition on common stock

Withholding price $43.10 per share Value used for tax-withholding shares

Shares held after transaction 79,753 shares Direct common stock holdings post-transaction

Key Terms

restricted stock units, performance-vesting restricted stock units, tax-withholding disposition, Common Stock

4 terms

restricted stock units financial

"taxes due upon the vesting of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

performance-vesting restricted stock units financial

"vesting of restricted stock units and performance-vesting restricted stock units"

Performance-vesting restricted stock units are a form of employee pay where future company shares are granted only if the business meets specific targets, such as revenue, profit, or stock-price goals. Think of them as a bonus you earn only when certain milestones are hit; for investors they matter because they can increase the number of shares outstanding if goals are met and they reveal how management is being motivated to hit particular financial or operational objectives.

tax-withholding disposition financial

"transaction_action: tax-withholding disposition"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Common Stock financial

"security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What insider transaction did Allegro Microsystems (ALGM) report for Sharon Briansky?

Allegro reported a tax-related share disposition for SVP and general counsel Sharon Briansky. On the Form 4, 13,942 common shares were withheld to cover taxes triggered by the vesting of prior restricted stock unit awards.

How many Allegro (ALGM) shares were withheld for Sharon Briansky’s taxes?

The filing shows 13,942 Allegro common shares were withheld for taxes. These shares satisfied tax obligations arising when restricted stock units and performance-vesting restricted stock units previously granted by the company vested.

At what price were Sharon Briansky’s Allegro (ALGM) shares valued for tax withholding?

The tax-withholding disposition used a share value of $43.10 per Allegro common share. This price was applied to 13,942 shares that were withheld to satisfy the tax liability associated with vesting equity awards.

How many Allegro (ALGM) shares does Sharon Briansky hold after this Form 4 transaction?

Following the tax-withholding transaction, Sharon Briansky directly holds 79,753 Allegro common shares. This post-transaction balance reflects her remaining equity position after 13,942 shares were withheld to cover tax obligations on vested stock units.

Was Sharon Briansky’s Allegro (ALGM) Form 4 a market sale of shares?

No, the Form 4 reflects a tax-withholding disposition rather than an open-market sale. Shares were withheld by Allegro to pay taxes due upon the vesting of restricted stock units and performance-vesting restricted stock units previously granted to Sharon Briansky.

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

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Accepted by SEC EDGAR 05/19/2026 - 05:28 PM EDT Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Briansky Sharon

(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, GC and Secretary

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/16/2026

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	05/16/2026		F		13,942(1)	D	$43.1	79,753	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 and performance-vesting restricted stock units that were previously granted by the Issuer

	/s/ Raymond Myer, Attorney-in-Fact for Sharon S. Briansky	05/19/2026
	** 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)