Item 6. EXHIBITS

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Item 6. EXHIBITS

Exhibit NumberDescription
31.1Certification of Chief Executive Officer, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. †
31.2Certification of Chief Financial Officer, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. †
32Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. §1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. †
101.INSInline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document. †
101.SCHInline XBRL Taxonomy Extension Schema Document. †
101.CALInline XBRL Taxonomy Extension Calculation Linkbase Document. †
101.DEFInline XBRL Taxonomy Extension Definition Linkbase Document. †
101.LABInline XBRL Taxonomy Extension Label Linkbase Document. †
101.PREInline XBRL Taxonomy Extension Presentation Linkbase Document. †
104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101). †

† Filed herewith.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Packaging Corporation of America
/s/ ROBERT P. MUNDY
Robert P. Mundy Executive Vice President and Chief Financial Officer

Date: August 8, 2024

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