X0609 4 2026-04-14 0 0001871509 Portillo's Inc. PTLO 0001865702 DARDEN TONY J false 2001 SPRING ROAD SUITE 400 OAK BROOK IL 60523 0 1 0 0 Chief Operating Officer 0 Class A common stock 2026-04-14 4 A 0 1034 0 A 101807 D Class A common stock 2026-04-15 4 A 0 58876 0 A 160683 D Class A common stock 2026-04-15 4 F 0 2182 5.52 D 158501 D Represents restricted stock units subject to time-based vesting, one-third of which vest on each April 15, 2026, 2027 and 2028, respectively, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement. Represents restricted stock units subject to time-based vesting granted on April 15, 2026, one-third of which vest on each of the first three anniversaries of the grant date, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement. Represents shares deducted to satisfy tax withholding obligations on the vesting of previously disclosed awards. /s/ Kelly M. Kaiser, as attorney-infact for Tony J Darden 2026-04-16