0000950170-25-030872.txt : 20250303 0000950170-25-030872.hdr.sgml : 20250303 20250303161607 ACCESSION NUMBER: 0000950170-25-030872 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20250227 FILED AS OF DATE: 20250303 DATE AS OF CHANGE: 20250303 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: D'Antilio Derek CENTRAL INDEX KEY: 0001904082 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-39675 FILM NUMBER: 25698134 MAIL ADDRESS: STREET 1: C/O ALLEGRO MICROSYSTEMS, INC. STREET 2: 955 PERIMETER ROAD CITY: MANCHESTER STATE: NH ZIP: 03103 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: ALLEGRO MICROSYSTEMS, INC. CENTRAL INDEX KEY: 0000866291 STANDARD INDUSTRIAL CLASSIFICATION: SEMICONDUCTORS & RELATED DEVICES [3674] ORGANIZATION NAME: 04 Manufacturing IRS NUMBER: 462405937 FISCAL YEAR END: 0331 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 4 1 ownership.xml 4 X0508 4 2025-02-27 0000866291 ALLEGRO MICROSYSTEMS, INC. ALGM 0001904082 D'Antilio Derek 955 PERIMETER ROAD MANCHESTER NH 03103 false true false false EVP, CFO & Treasurer false Common Stock 2025-02-27 4 A false 20671 0 A 188097 D Represents an award of Restricted Stock Units ("RSUs") granted on February 27, 2025. Each RSU represents a contingent right to receive one share of common stock. The RSUs will vest in full on February 27, 2026. /s/ Raymond Myer, Attorney-in-Fact for Derek P. D'Antilio 2025-03-03