<SEC-DOCUMENT>0000950170-25-089737-index.html : 20250625
<SEC-HEADER>0000950170-25-089737.hdr.sgml : 20250625
<ACCEPTANCE-DATETIME>20250625074036
ACCESSION NUMBER:		0000950170-25-089737
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20250625
DATE AS OF CHANGE:		20250625

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALLEGRO MICROSYSTEMS, INC.
		CENTRAL INDEX KEY:			0000866291
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				462405937
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39675
		FILM NUMBER:		251070979

	BUSINESS ADDRESS:	
		STREET 1:		955 PERIMETER ROAD
		CITY:			MANCHESTER
		STATE:			NH
		ZIP:			03103
		BUSINESS PHONE:		(603) 626-2300

	MAIL ADDRESS:	
		STREET 1:		955 PERIMETER ROAD
		CITY:			MANCHESTER
		STATE:			NH
		ZIP:			03103

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALLEGRO MICROSYSTEMS INC
		DATE OF NAME CHANGE:	19900730
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>algm_2025_proxy_addtl_ma.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: algm_2025_proxy_addtl_ma.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>img186737531_0.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: img186737531_0.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>img186737531_1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: img186737531_1.jpg

</DOCUMENT>
</SEC-DOCUMENT>