Erin Hagen - 15 May 2025 Form 4 Insider Report for ALLEGRO MICROSYSTEMS, INC. (ALGM)

Role: SVP, CHRO
Signature: /s/ Raymond Myer, Attorney-in-Fact for Erin E. Hagen
Issuer symbol: ALGM
Transactions as of: 15 May 2025
Net transactions value: -$134,771
Form type: 4
Filing time: 19 May 2025, 16:20:10 UTC
Previous filing: 14 May 2025
Next filing: 05 Aug 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Hagen Erin	SVP, CHRO	955 PERIMETER ROAD, MANCHESTER	/s/ Raymond Myer, Attorney-in-Fact for Erin E. Hagen	19 May 2025	0002022960

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ALGM	Common Stock	Award	$0	+18,153	+69%	$0.000000	44,630	15 May 2025	Direct	F1
transaction	ALGM	Common Stock	Tax liability	$134,771	-4,899	-11%	$27.51	39,731	16 May 2025	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents an award of Restricted Stock Units ("RSUs") granted on May 15, 2025. 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, 2026.
F2	Represents shares withheld to cover taxes due upon the vesting of performance-vesting restricted stock units and RSUs that were previously granted by the Issuer.