Erin Hagen of Allegro Microsystems (ALGM) awarded 9,058 RSUs in equity grant

Rhea-AI Filing Summary

Hagen Erin reported acquisition or exercise transactions in this Form 4 filing.

ALLEGRO MICROSYSTEMS, INC. reported that SVP and Chief Human Resources Officer Erin Hagen received an equity award in the form of restricted stock units. On May 13, 2026, she was granted 9,058 RSUs, each representing a contingent right to receive one share of common stock.

The RSUs will vest in three equal annual installments beginning on May 16, 2027, spreading the award over three years and linking it to continued service. Following this grant, Hagen holds a total of 39,152 shares of common stock directly, showing her ongoing equity stake in the company.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Hagen Erin

Role SVP, CHRO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	9,058	$0.00	--

Holdings After Transaction: Common Stock — 39,152 shares (Direct, null)

Footnotes (1)

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Key Figures

RSUs granted: 9,058 RSUs Vesting schedule: 3 equal annual installments Shares held after grant: 39,152 shares

3 metrics

RSUs granted 9,058 RSUs Awarded to Erin Hagen on May 13, 2026

Vesting schedule 3 equal annual installments Beginning May 16, 2027

Shares held after grant 39,152 shares Total common stock directly held by Erin Hagen

Key Terms

Restricted Stock Units ("RSUs"), contingent right, vest

3 terms

Restricted Stock Units ("RSUs") financial

"Represents an award of Restricted Stock Units ("RSUs") granted on May 13, 2026."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

contingent right financial

"Each RSU represents a contingent right to receive one share of common stock."

vest financial

"The RSUs will vest in three equal annual installments beginning on May 16, 2027."

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

Form 4 Insider Transactions: What Each Field Means →

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)
05/13/2026

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	05/13/2026		A		9,058(1)	A	$0.00	39,152	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 an award of Restricted Stock Units ("RSUs") granted on May 13, 2026. Each RSU represents a contingent right to receive one share of common stock. The RSUs will vest in three equal annual installments beginning on May 16, 2027.

	/s/ Raymond Myer, Attorney-in-Fact for Erin E. Hagen	05/15/2026
	** 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 Allegro Microsystems (ALGM) report for Erin Hagen?

Allegro Microsystems reported that SVP and CHRO Erin Hagen received 9,058 restricted stock units on May 13, 2026. Each unit represents a contingent right to one common share, increasing her direct holdings to 39,152 shares after the grant.

How many RSUs did Erin Hagen receive from Allegro Microsystems (ALGM)?

Erin Hagen received 9,058 restricted stock units from Allegro Microsystems. These RSUs are a form of equity compensation, with each unit convertible into one share of common stock, subject to the award’s vesting schedule over future years.

What is the vesting schedule for Erin Hagen’s Allegro Microsystems (ALGM) RSUs?

The 9,058 RSUs granted to Erin Hagen will vest in three equal annual installments. Vesting begins on May 16, 2027, meaning one-third of the award vests each year, aligning her compensation with multi-year employment and company performance.

What are Erin Hagen’s Allegro Microsystems (ALGM) holdings after the RSU grant?

After the RSU grant, Erin Hagen directly holds 39,152 shares of Allegro Microsystems common stock. This total reflects her position following the May 13, 2026 award and shows her ongoing equity exposure as a senior executive.

What does an RSU grant mean for Allegro Microsystems (ALGM) executives?

An RSU grant gives Allegro Microsystems executives a contingent right to receive shares over time. For Erin Hagen, 9,058 RSUs will convert into common stock as they vest, creating a longer-term alignment between her compensation and shareholder interests.