A Dark Vector Cognition product

Item 6. EXHIBITS

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Item 6. EXHIBITS

Exhibit NumberDescription
10.1Form of Performance Unit Agreement (Return on Invested Capital) for executive officer awards, as approved on February 25, 2026. (Incorporated herein by reference to Exhibit 10.1 to PCA’s Current Report on Form 8-K filed March 3, 2026, File No. 1-15399).
10.2Form of Performance Unit Agreement (Total Shareholder Return) for executive officer awards, as approved on February 25, 2026. (Incorporated herein by reference to Exhibit 10.2 to PCA’s Current Report on Form 8-K filed March 3, 2026, File No. 1-15399).
10.3Form of Restricted Stock Unit Agreement for executive officer awards, as approved on February 25, 2026. (Incorporated herein by reference to Exhibit 10.3 to PCA’s Current Report on Form 8-K filed March 3, 2026, File No. 1-15399).
10.4Post Retirement Agreement, dated as of March 1, 2026, between PCA and Robert Mundy. (Incorporated herein by reference to Exhibit 10.4 to PCA’s Current Report on Form 8-K filed March 3, 2026, File No. 1-15399).
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. †
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/ FABIAN C. STRAUSS
FABIAN C. STRAUSS Senior Vice President, Finance, Controller and Treasurer

Date: May 8, 2026

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