Item 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES

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Item 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES

(a)

The following documents are filed as a part of this report:

(1)

The financial statements listed in the “Index to Financial Statements.”

(2)

Financial Statement Schedule.

All schedules for which provision is made in the applicable accounting regulations of the Securities and Exchange Commission are not required under the related instructions, are inapplicable or not material, or the information called for thereby is otherwise included in the financial statements or the accompanying notes to the financial statements and therefore, have been omitted.

(3)

Exhibits


Exhibit Number		Description

2.1		Contribution Agreement, dated as of January 25, 1999, among Pactiv Corporation (formerly known as Tenneco Packaging Inc.) (“Pactiv”), PCA Holdings LLC (“PCA Holdings”) and Packaging Corporation of America (“PCA”). (Incorporated herein by reference to Exhibit 2.1 to PCA’s registration Statement on Form S-4, Registration No. 333-79511).

2.2		Letter Agreement Amending the Contribution Agreement, dated as of April 12, 1999, among Pactiv, PCA Holdings and PCA. (Incorporated herein by reference to Exhibit 2.2 to PCA’s Registration Statement on Form S-4, Registration No. 333-79511).

2.3		Agreement and Plan of Merger, dated September 16, 2013, between PCA, Bee Acquisition Corp. and Boise Inc. (Incorporated herein by reference to Exhibit 2.1 to PCA’s Current Report on Form 8-K filed September 17, 2013, File No. 1-15399). PCA will furnish supplementally a copy of any omitted schedule or exhibit to the SEC upon request; provided, however, that PCA may request confidential treatment pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended, for any schedule or exhibit so furnished.

2.4		Purchase and Sale Agreement, dated June 30, 2025, between PCA, Greif, Inc., and Greif Packaging LLC (Incorporated herein by reference to Exhibit 10.1 to PCA’s Current Report on Form 8-K filed July 3, 2025, File No. 1-15399). PCA will furnish supplementally a copy of any omitted schedule or exhibit to the SEC upon request; provided, however, that PCA may request confidential treatment pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended, for any schedule or exhibit so furnished.

3.1		Restated Certificate of Incorporation of PCA. (Incorporated herein by reference to Exhibit 3.1 to PCA’s Registration Statement on Form S-4, Registration No. 333-79511).

3.2		Certificate of Amendment to Restated Certificate of Incorporation of PCA. (Incorporated herein by reference to Exhibit 3.2 to PCA’s Registration Statement on Form S-4, Registration No. 333-109437.)

3.3		Amended and Restated By-laws of PCA. (Incorporated herein by reference to Exhibit 3.1 to PCA’s Current Report on Form 8-K filed December 13, 2020, File No. 1-15399.)

4.1		Form of certificate representing shares of common stock. (Incorporated herein by reference to Exhibit 4.9 to PCA’s Registration Statement on Form S-1, Registration No. 333-86963.)

4.2		Indenture, dated as of July 21, 2003, between PCA and U.S. Bank National Association. (Incorporated herein by reference to Exhibit 4.2 to PCA’s Quarterly Report on Form 10-Q for the period ended June 30, 2003, File No. 1-15399.)

4.3		First Supplemental Indenture, dated as of July 21, 2003, between PCA and U.S. Bank National Association. (Incorporated herein by reference to Exhibit 4.3 to PCA’s Quarterly Report on Form 10-Q for the period ended June 30, 2003, File No. 1-15399.)



4.4		Officers’ Certificate, dated as of November 21, 2019, pursuant to Section 301 of the Indenture establishing 3.000% Senior Notes due 2029 and 4.050% Senior Notes due 2049. (Incorporated herein by reference to Exhibit 4.1 to PCA’s Current Report on Form 8-K filed November 21, 2019, File No. 1-15399.)

4.5		3.000% Senior Notes due 2029. (Incorporated herein by reference to Exhibit 4.2 to PCA’s Current Report on Form 8-K filed November 21, 2019, File No. 1-15399.)

4.6		4.050% Senior Notes due 2049. (Incorporated herein by reference to Exhibit 4.3 to PCA’s Current Report on Form 8-K filed November 21, 2019, File No. 1-15399.)

4.7		Officer’s Certificate, dated December 13, 2017, pursuant to Section 301 of the Indenture establishing 2.450% Senior Notes due 2020 (redeemed and no longer outstanding) and 3.400% Senior Notes due 2027. (Incorporated herein by reference to Exhibit 4.1 to PCA’s Current Report on Form 8-K filed December 13, 2017, File No. 1-15399).

4.8		3.400% Senior Notes due 2027 (Incorporated herein by reference to Exhibit 4.3 to PCA’s Current Report on Form 8-K filed December 13, 2017, File No. 1-15399).

4.9		Officer’s Certificate, dated September 21, 2021, pursuant to Section 301 of the Indenture establishing 3.050% Senior Notes due 2051. (Incorporated herein by reference to Exhibit 4.1 to PCA’s Current Report on Form 8-K filed September 21, 2021, File No. 1-15399).

4.10		3.050% Senior Notes due 2051 (Incorporated herein by reference to Exhibit 4.2 to PCA’s Current Report on Form 8-K filed September 21, 2021, File No 1-15399.)

4.11		Officers’ Certificate, dated November 30, 2023, pursuant to Section 301 of the Indenture establishing 5.700% Senior Notes due 2033. (Incorporated herein by reference to Exhibit 4.1 to PCA's Current Report on Form 8-K filed November 30, 2023, File No. 1-15399).

4.12		5.700% Senior Notes due 2033 (Incorporated herein by reference to Exhibit 4.2 to PCA’s Current Report on Form 8-K filed November 30, 2023, File No. 1-15399).

4.13		Officers’ Certificate, dated August 15, 2025, pursuant to Section 301 of the Indenture establishing 5.200% Senior Notes due 2035. (Incorporated herein by reference to Exhibit 4.1 to PCA's Current Report on Form 8-K filed August 15, 2025, File No. 1-15399).

4.14		5.200% Senior Notes due 2035 (Incorporated herein by reference to Exhibit 4.2 to PCA’s Current Report on Form 8-K filed August 15, 2025, File No. 1-15399).

4.15		Description of Common Stock. (Incorporated herein by reference to Exhibit 4.13 to PCA’s Annual Report on Form 10-K for the year ended December 31, 2019, File No. 1-15399).

10.1		Credit Agreement, dated July 31, 2025 between Packaging Corporation of America and the lenders and agents named therein. (Incorporated herein by reference to Exhibit 10.1 to PCA’s Current Report on Form 8-K filed August 6, 2025, File No. 1-15399).



10.2		Credit Agreement, dated July 31, 2025 between Packaging Corporation of America and the lenders and agents named therein. (Incorporated herein by reference to Exhibit 10.2 to PCA’s Current Report on Form 8-K filed August 6, 2025, File No. 1-15399).

10.3		Packaging Corporation of America Thrift Plan for Hourly Employees and First Amendment of Packaging Corporation of America Thrift Plan for Hourly Employees, effective February 1, 2000. (Incorporated herein by reference to Exhibit 4.5 to PCA’s Registration Statement on Form S-8, Registration No. 333-33176.)

10.4		Packaging Corporation of America Retirement Savings Plan, effective February 1, 2000. (Incorporated herein by reference to Exhibit 4.6 to PCA’s Registration Statement on Form S-8, Registration No. 333-33176.)*

10.5		Packaging Corporation of America Supplemental Executive Retirement Plan, as Amended and Restated Effective as of January 1, 2023. (Incorporated herein by reference to Exhibit 10.4 to PCA’s Annual Report on Form 10-K for the year ended December 31, 2022, File No. 1-15399).*

10.6		Packaging Corporation of America Deferred Compensation Plan, as Amended and Restated Effective as of February 27, 2019. (Incorporated herein by reference to Exhibit 10.5 to PCA's Annual Report on Form 10-K for the year ended December 31, 2019, File No. 1-15399).*

10.7		Second Amended and Restated 1999 Long-Term Equity Incentive Plan, effective as of May 8, 2024, conformed to incorporate all amendments. (Incorporated herein by reference to Appendix B to PCA’s Proxy Statement for the 2024 Annual Meeting of Stockholders)*

10.8		Amended and Restated Executive Incentive Compensation Plan, effective as of December 29, 2017. (Incorporated herein by reference to Exhibit 10.10 to PCA’s Annual Report on Form 10-K for the year ended December 31, 2017, File No. 1-15399.)*

10.9		Trade Vendor Purchasing Agreement, dated December 6, 2019, between Boise White Paper, L.L.C. and Office Depot, Inc. (Incorporated by reference to Exhibit 10.11 to PCA’s Annual Report on Form 10-K for the year ended December 31, 2019, File No. 1-15399)**

10.10		Form of Return on Invested Capital Performance Unit Agreement for executive officer awards. (Incorporated by reference to Exhibit 10.2 to PCA’s Quarterly Report on Form 10-Q for the period ended June 30, 2018, File No. 1-15399).*

10.11		Form of Total Shareholder Return Performance Unit Agreement for executive officer awards. (Incorporated by reference to Exhibit 10.3 to PCA’s Quarterly Report on Form 10-Q for the period ended June 30, 2018, File No. 1-15399).*

10.12		Form of Restricted Stock Agreement for executive officer awards. (Incorporated by reference to Exhibit 10.1 to PCA’s Quarterly Report on Form 10-Q for the period ended June 30, 2018, File No. 1-15399).*

19.1		Packaging Corporation of America Insider Trading Policy adopted December 7, 2011 with Addendum applicable to certain designated persons. (Incorporated herein by reference to Exhibit 19 to PCA’s Annual Report on Form 10-K for the year ended December 31, 2024, File No. 1-15399).

21.1		Subsidiaries of the Registrant.†

23.1		Consent of KPMG LLP.†

24.1		Powers of Attorney.†

31.1		Certification of Chief Executive Officer, As Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.†

31.2		Certification of Chief Financial Officer, As Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.†



32		Certification 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.†

97		Packaging Corporation of America Clawback Policy, adopted as of December 1, 2023. (Incorporated herein by reference to Exhibit 97 to PCA’s Annual Report on Form 10-K for the year ended December 31, 2023, File No. 1-15399).

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Management contract or compensatory plan or arrangement.

** Confidential information in this exhibit has been omitted.

† Filed herewith.

SIG****NATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on their behalf by the undersigned, thereunto duly authorized on February 26, 2026.


		Packaging Corporation of America

		/s/ MARK W. KOWLZAN
		Mark W. Kowlzan
		Chairman of the Board and Chief Executive Officer
		Principal Executive Officer

		/s/ KENT A. PFLEDERER
		Kent A. Pflederer
		Executive Vice President and Chief Financial Officer
		Principal Financial Officer and Principal Accounting Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below on February 26, 2026, by the following persons on behalf of the registrants and in the capacities indicated.


Signature		Capacity


/s/ MARK W. KOWLZAN		Chairman of the Board and Chief Executive Officer
Mark W. Kowlzan		(Principal Executive Officer)


/s/ KENT A. PFLEDERER		Executive Vice President and Chief Financial Officer
Kent A. Pflederer		(Principal Financial Officer and Principal Accounting Officer)


*		Director
Cheryl K. Beebe

*		Director
Duane C. Farrington

*		Director
Karen E. Gowland

*		Director
Donna A. Harman

*		Director
Robert C. Lyons

*		Director
Samuel M. Mencoff

*		Director
Roger B. Porter

*		Director
Thomas S. Souleles

*		Director
Paul T. Stecko


/s/ KENT A. PFLEDERER
Kent A. Pflederer
(Attorney-In-Fact)

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