ALLEGRO MICROSYSTEMS, INC. — Director's Dealing 2021

May 19, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ALLEGRO MICROSYSTEMS, INC. (ALGM)
CIK: 0000866291
Period of Report: 2021-05-18

Reporting Person: Walsh Paul V Jr (SVP, CFO & Treasurer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-18	Common Stock	S	65275	$23.98	Disposed	1309576	Indirect
2021-05-19	Common Stock	S	4725	$23.59	Disposed	1304851	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	97493	Direct

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 5, 2021.

F2: The reported transaction involves sale transactions ranging from $23.66 to $24.37 per share. The weighted average price per share was $23.98. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

F3: The reported transaction involves sale transactions ranging from $23.08 to $23.85 per share. The weighted average price per share was $23.59. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.