X0508 4 2026-03-02 0 0001871509 Portillo's Inc. PTLO 0001263765 Miles Michael C/O PORTILLO'S INC. 2001 SPRING ROAD, SUITE 400 OAK BROOK IL 60523 1 0 0 0 0 Class A common stock 2026-03-02 4 A 0 47004 0 A 446917 D Represents restricted stock units ("RSUs") granted on March 2, 2026, which will vest in full on December 31, 2026, subject to the Reporting Person's continued service with the Issuer through such vesting date and the terms of the applicable award agreement. By: /s/ Kelly M. Kaiser, as attorney-in-fact for Michael Miles 2026-03-04