UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 _________________ FORM 10-Q _________________ (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 25, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39675 _________________ ALLEGRO MICROSYSTEMS, INC. (Exact Name of Registrant as Specified ...