X0508 4 2026-01-02 0 0001871509 Portillo's Inc. PTLO 0001350874 Hartung Jack C/O PORTILLO'S INC. 2001 SPRING ROAD, SUITE 400 OAK BROOK IL 60523 1 0 0 0 0 Class A common stock 2026-01-02 4 A 0 43572 0 A 132628 D Represents restricted stock units ("RSUs") granted on January 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. Upon vesting of the RSUs, the settlement has been deferred by the Reporting Person, pursuant to the Reporting Person's election made on December 23, 2025 and maintained by the Issuer. /s/ Kelly M. Kaiser, as attorney-in-fact for Jack Hartung 2026-01-05