PACKAGING CORP OF AMERICA (PKG) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-03 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: PACKAGING CORP OF AMERICA (PKG) CIK: 0000075677 --- Reporting Owner --- Name: Hassfurther Thomas A CIK: 0001318252 Role: Officer (President) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-08-03 | Code: S (Open market sale) Shares: -12,531 | Price: $250.00 Total Value: $3,132,750.00 Shares Owned After: 218,751 | Ownership: D (Direct) [Transaction #2] Security: Common Stock Date: 2026-08-05 | Code: S (Open market sale) Shares: -8,797 | Price: $257.00 Total Value: $2,260,829.00 Shares Owned After: 209,954 | Ownership: D (Direct) --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) [Holding #2] Security: Common Stock Ownership: I (Indirect) Footnotes: [F1] Reporting person disclaims beneficial ownership of shares held by spouse. [Holding #3] Security: Common Stock Ownership: I (Indirect) Footnotes: [F2] Reporting person disclaims beneficial ownership of shares held by investment entity except to the extent of his pecuniary interest therein. --- Footnotes (Complete Index) --- F1: Reporting person disclaims beneficial ownership of shares held by spouse. F2: Reporting person disclaims beneficial ownership of shares held by investment entity except to the extent of his pecuniary interest therein. --- Signature --- /s/ Kent A. Pflederer, attorney in fact (2026-08-05)