X0609 4 2026-05-12 0000075677 PACKAGING CORP OF AMERICA PKG 0001796937 Harman Donna A. false 1 N. FIELD CT LAKE FOREST IL 60045 true false false false false Common Stock 2026-05-12 4 A false 591 0 A 5179 D Share award for equity portion of directors fees. Kent A. Pflederer, attorney in fact 2026-05-12