DEFA14A - Portillo's

DEFA14AAdditional Proxy Materials

EX-10.1COOPERATION AGREEMENT, DATED APRIL 28, 2025, BY AND BETWEEN PORTILLO'S INC. AND ENGAGED CAPITAL FLAGSHIP MASTER FUND, LP, ENGAGED CAPITAL CO-INVEST XVII, LP, ENGAGED CAPITAL, LLC, ENGAGED CAPITAL HOLDINGS, LLC AND GLENN W. WELLING

EX-99.1PRESS RELEASE, DATED APRIL 28, 2025