    <SEC-DOCUMENT>0000950170-25-089738-index.html : 20250625
    <SEC-HEADER>0000950170-25-089738.hdr.sgml : 20250625
    <ACCEPTANCE-DATETIME>20250625074320
    ACCESSION NUMBER:		0000950170-25-089738
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20250328
    FILED AS OF DATE:		20250625
    DATE AS OF CHANGE:		20250625
    EFFECTIVENESS DATE:		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:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39675
    		FILM NUMBER:		251070980

    	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>ARS
    <SEQUENCE>1
    <FILENAME>algm_fy25_annual_report.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: algm_fy25_annual_report.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>