Roald G. Webster - 13 May 2025 Form 4 Insider Report for ALLEGRO MICROSYSTEMS, INC. (ALGM)

Role: VP, Chief Accounting Officer
Signature: /s/ Raymond Myer, Attorney-in-Fact for Roald G. Webster
Issuer symbol: ALGM
Transactions as of: 13 May 2025
Net transactions value: $0
Form type: 4
Filing time: 14 May 2025, 16:30:19 UTC
Previous filing: 13 Jun 2024
Next filing: 19 May 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Webster Roald Graham	VP, Chief Accounting Officer	955 PERIMETER ROAD, MANCHESTER	/s/ Raymond Myer, Attorney-in-Fact for Roald G. Webster	14 May 2025	0001970184

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ALGM	Common Stock	Award	$0	+1,002	+5.1%	$0.000000	20,749	13 May 2025	Direct	F1

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

Explanation of Responses:

Id	Content
F1	On June 11, 2024, the Reporting Person was granted an award of performance-vesting restricted stock units (the "PSUs"). The PSUs were subject to the Issuer's attainment of certain performance objectives over the Issuer's 2025 fiscal year, and the PSUs are scheduled to vest in full on May 16, 2025 in the form of common stock. On May 13, 2025, the Compensation Committee of the Issuer's Board of Directors determined that the performance objective goals of the PSUs for the period ending March 28, 2025 had been met for the aggregate number of shares shown. Following certification, the award remains subject to the time-based vesting conditions, with the amount shown scheduled to vest in full on May 16, 2025.

Content

On June 11, 2024, the Reporting Person was granted an award of performance-vesting restricted stock units (the "PSUs"). The PSUs were subject to the Issuer's attainment of certain performance objectives over the Issuer's 2025 fiscal year, and the PSUs are scheduled to vest in full on May 16, 2025 in the form of common stock. On May 13, 2025, the Compensation Committee of the Issuer's Board of Directors determined that the performance objective goals of the PSUs for the period ending March 28, 2025 had been met for the aggregate number of shares shown. Following certification, the award remains subject to the time-based vesting conditions, with the amount shown scheduled to vest in full on May 16, 2025.