Allegro Microsystems (ALGM) CEO uses 60,508 shares to cover taxes on vesting

Q: How many Allegro Microsystems (ALGM) shares were used for taxes?

The filing shows 60,508 common shares withheld at $43.10 per share to satisfy tax obligations on vested restricted stock units and performance-vesting restricted stock units that had been granted earlier.

Q: Is the ALGM CEO’s Form 4 transaction an open-market sale?

No, the transaction is described as a tax-withholding disposition , not an open-market sale. Shares were withheld by the issuer to cover taxes triggered by the vesting of equity awards previously granted to the CEO.

Q: What indirect ALGM holdings does the CEO report?

The Form 4 lists 252,797 common shares held indirectly by the Michael C. Doogue Revocable Trust of 2015 . This entry is reported as indirect ownership, separate from the CEO’s directly held Allegro Microsystems shares.

Filing Impact

(Very High)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

ALLEGRO MICROSYSTEMS, INC. President and CEO Michael Doogue reported routine share movements related to equity compensation. On the Form 4 date, 60,508 shares of common stock were withheld at $43.10 per share to cover taxes due upon the vesting of previously granted restricted stock units and performance-vesting restricted stock units. This tax-withholding disposition was not an open-market sale. After these transactions, Doogue held 279,076 common shares directly and 252,797 common shares indirectly through the Michael C. Doogue Revocable Trust of 2015.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Doogue Michael

Role President and CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	60,508	$43.10	$2.61M
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 279,076 shares (Direct, null); Common Stock — 252,797 shares (Indirect, By the Michael C. Doogue Revocable Trust of 2015)

Footnotes (1)

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Key Figures

Tax-withheld shares: 60,508 shares Tax-withholding price: $43.10 per share Direct holdings after transaction: 279,076 shares +2 more

5 metrics

Tax-withheld shares 60,508 shares Shares withheld to cover taxes on vesting equity awards

Tax-withholding price $43.10 per share Price for tax-withheld common stock

Direct holdings after transaction 279,076 shares Common stock held directly after tax-withholding disposition

Indirect trust holdings 252,797 shares Common stock held by Michael C. Doogue Revocable Trust of 2015

Tax-withholding transactions 1 transaction TaxWithholdingCount in transaction summary

Key Terms

restricted stock units, performance-vesting restricted stock units, tax-withholding disposition, indirect ownership

4 terms

restricted stock units financial

"vesting of restricted stock units and performance-vesting 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.

performance-vesting restricted stock units financial

"vesting of restricted stock units and performance-vesting restricted stock units that were previously granted"

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.

indirect ownership financial

"ownership_type": "indirect" for shares held by the Michael C. Doogue Revocable Trust of 2015"

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^*

Doogue Michael

(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)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	President and CEO

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		60,508⁽¹⁾	D	$43.1	279,076	D
Common Stock								252,797	I	By the Michael C. Doogue Revocable Trust of 2015

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 and performance-vesting restricted stock units that were previously granted by the Issuer.

	/s/ Raymond Myer, Attorney-in-Fact for Michael C. Doogue	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 ALGM CEO Michael Doogue report in this Form 4?

Michael Doogue reported a tax-related share disposition and updated holdings. 60,508 shares were withheld to cover taxes on vesting equity awards, and his direct and indirect common stock positions were updated accordingly in this filing.

How many Allegro Microsystems (ALGM) shares were used for taxes?

The filing shows 60,508 common shares withheld at $43.10 per share to satisfy tax obligations on vested restricted stock units and performance-vesting restricted stock units that had been granted earlier.

Is the ALGM CEO’s Form 4 transaction an open-market sale?

No, the transaction is described as a tax-withholding disposition, not an open-market sale. Shares were withheld by the issuer to cover taxes triggered by the vesting of equity awards previously granted to the CEO.

How many ALGM shares does the CEO hold directly after this filing?

After the tax-withholding disposition, Michael Doogue holds 279,076 shares of Allegro Microsystems common stock directly. This figure reflects his updated direct ownership position reported in the Form 4.

What indirect ALGM holdings does the CEO report?

The Form 4 lists 252,797 common shares held indirectly by the Michael C. Doogue Revocable Trust of 2015. This entry is reported as indirect ownership, separate from the CEO’s directly held Allegro Microsystems shares.

Why were ALGM restricted stock units and performance-vesting RSUs mentioned?

They explain the source of the tax liability. The footnote states shares were withheld to cover taxes due upon the vesting of restricted stock units and performance-vesting restricted stock units that the company had previously granted.