What was the reported price per share for Erin Hagen’s Allegro Microsystems (ALGM) tax withholding?

The Form 4 reports a price of $43.10 per Allegro Microsystems share for the 5,815 shares withheld. This figure is used to calculate the value of shares applied toward Hagen’s tax liability on vested restricted stock units.

Allegro Microsystems (ALGM) SVP has 5,815 shares withheld for RSU taxes

Filing Impact

(Moderate)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

ALLEGRO MICROSYSTEMS, INC. executive Erin Hagen, the company’s SVP and chief human resources officer, had 5,815 shares of Common Stock withheld on May 16, 2026 to cover taxes due on previously granted restricted stock units that vested. After this tax-withholding disposition, Hagen directly owns 33,337 shares of Allegro common stock, indicating this was a routine compensation-related event rather than an open‑market trade.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Hagen Erin

Role SVP, CHRO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	5,815	$43.10	$251K

Holdings After Transaction: Common Stock — 33,337 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares withheld for taxes: 5,815 shares Withholding price per share: $43.10 per share Shares owned after transaction: 33,337 shares +1 more

4 metrics

Shares withheld for taxes 5,815 shares Tax-withholding disposition on May 16, 2026

Withholding price per share $43.10 per share Value applied to tax liability

Shares owned after transaction 33,337 shares Direct ownership following tax withholding

Transaction date May 16, 2026 Date of tax-withholding disposition

Key Terms

restricted stock units, tax-withholding disposition, Common Stock, Form 4

4 terms

restricted stock units financial

"upon the vesting of restricted stock units that were previously granted"

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.

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.

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

05/19/2026 - 05:30 PM

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^*

Hagen Erin

(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, CHRO

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/16/2026		F		5,815⁽¹⁾	D	$43.1	33,337	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 Erin E. Hagen	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)

Source: View Original Filing on SEC EDGAR

FAQ

What did Allegro Microsystems (ALGM) SVP Erin Hagen report in this Form 4?

Erin Hagen reported a tax-related share disposition, where 5,815 Allegro Microsystems common shares were withheld to cover taxes on vested restricted stock units. This is a routine compensation event rather than an open‑market stock sale.

How many Allegro Microsystems (ALGM) shares were withheld for taxes from Erin Hagen?

A total of 5,815 Allegro Microsystems common shares were withheld to cover tax obligations tied to the vesting of restricted stock units. The withholding price was reported as $43.10 per share in the Form 4 insider transaction details.

Does the Form 4 show an open-market sale by Allegro Microsystems (ALGM) executive Erin Hagen?

No, the Form 4 shows a tax-withholding disposition, not an open-market sale. Shares were withheld by the issuer to pay taxes on vested restricted stock units previously granted as part of Hagen’s equity compensation.

How many Allegro Microsystems (ALGM) shares does Erin Hagen hold after this transaction?

After the tax-withholding transaction, Erin Hagen directly holds 33,337 Allegro Microsystems common shares. This remaining position reflects her ongoing equity stake following the vesting and related tax settlement of restricted stock units.

What triggered the tax-withholding disposition for Allegro Microsystems (ALGM) insider Erin Hagen?

The disposition was triggered by the vesting of restricted stock units previously granted by Allegro Microsystems. When these RSUs vested, 5,815 shares of common stock were withheld by the company to satisfy Hagen’s associated tax obligations.