0000866291 2022-03-26 2023-03-31 0000866291 false 8-K 2022-07-28 ALLEGRO MICROSYSTEMS, INC. DE 001-39675 46-2405937 955 Perimeter Road Manchester, NH 03103 (603) 626-2300 false false false false Common Stock, par value $0.01 per share ALGM NASDAQ false false