SEC Form DEF 14A filed by Packaging Corporation of America

PACKAGING CORPORATION OF AMERICA

March 27, 2026

Dear PCA Stockholder:

You are cordially invited to attend the 2026 Annual Meeting of Stockholders to be held at our corporate office, located at 1 N. Field Court, Lake Forest, Illinois, on Tuesday, May 12, 2026 at 8:30 a.m., central time.

Following this page is the formal notice of the meeting and our Proxy Statement. Also enclosed is our 2025 Annual Report to Stockholders.

It is important that your shares are represented at the meeting. You may vote over the Internet or by mailing a proxy or voting instruction card. Whether or not you expect to attend the meeting, please vote your shares by following the voting instructions on your notice of availability of proxy materials or your proxy or voting instruction card.

Sincerely,

Mark W. Kowlzan Chairman and Chief Executive Officer

PACKAGING CORPORATION OF AMERICA

1 N. Field Court

Lake Forest, Illinois 60045

(847) 482-3000

NOTICE OF THE

2026 ANNUAL MEETING OF STOCKHOLDERS

MAY 12, 2026

The Annual Meeting of Stockholders of Packaging Corporation of America will be held at our corporate office located at 1 N. Field Court, Lake Forest, Illinois, on May 12, 2026, beginning at 8:30 a.m., central time. The purpose of the meeting is to:

Only stockholders of record at the close of business on March 16, 2026 are entitled to receive notice of and to vote at the meeting or any postponement or adjournment thereof.

Your vote is important. Whether you plan to attend the meeting or not, you are urged to vote your shares by following the voting instructions on your notice of availability of proxy materials or your proxy or voting instruction card. If you do attend the meeting, you may revoke your proxy and vote in person.

TABLE OF CONTENTS

PACKAGING CORPORATION OF AMERICA

1 N. Field Court

Lake Forest, Illinois 60045

(847) 482-3000

PROXY STATEMENT

This proxy statement contains information related to our 2026 Annual Meeting of Stockholders to be held on May 12, 2026 at 8:30 a.m., central time, at our corporate office located at 1 N. Field Court, Lake Forest, Illinois, or at such other time and place to which the annual meeting may be adjourned or postponed. The enclosed proxy is solicited by our board of directors. The proxy materials relating to the annual meeting are first being mailed on or about March 27, 2026 to stockholders entitled to vote at the meeting.

ABOUT THE MEETING

What is the purpose of the annual meeting?

At the annual meeting, stockholders will act upon the matters outlined in the accompanying notice of meeting, including the following:

The board of directors recommends that you vote your shares FOR each of the director nominees, and FOR Items 2 and 3.

Who is entitled to vote at the meeting?

Only stockholders of record at the close of business on the record date, March 16, 2026, are entitled to receive notice of the annual meeting of stockholders and to vote their shares of our common stock that they held on that date at the meeting, or any postponement or adjournment of the meeting. Except as otherwise required by law, holders of our common stock are entitled to one vote per share on each matter to be voted upon at the meeting.

As of March 16, 2026 we had 89,027,954 shares of our common stock outstanding.

Who can attend the meeting?

All stockholders as of the record date, or their duly appointed proxies, may attend the meeting upon presentation of proper identification. Registration and seating will begin at 8:00 a.m., central time. Cameras, recording devices and other electronic devices will not be permitted at the meeting. You may obtain directions to the meeting place by calling our corporate offices at (847) 482-3000.

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Please note that if you hold your shares in “street name” (that is, through a broker or other nominee), you will need to bring a copy of your voting instruction card or a brokerage statement reflecting your stock ownership as of the record date and check in at the registration desk at the meeting.

What constitutes a quorum?

A quorum is necessary to hold a valid meeting. The presence at the meeting, in person or by proxy, of the holders of a majority of our outstanding common stock on the record date will constitute a quorum for our meeting. Broker non-votes and proxies received but marked as abstentions will be included as present for purposes of establishing a quorum. A broker non-vote occurs when a nominee holding shares for a beneficial owner does not vote on a particular proposal because the nominee does not have discretionary voting power for the particular matter and has not received voting instructions from the beneficial owner. We expect that nominees will not have discretionary authority for Items 1 (Election of Directors) and 3 (Approval of Executive Compensation) and will have discretionary authority for Item 2 (Ratification of Independent Registered Public Accounting Firm).

If a quorum is not present at the annual meeting, the stockholders present may adjourn the annual meeting from time to time, without notice, other than by announcement at the meeting, until a quorum is present or represented. At any such adjourned meeting at which a quorum is present or represented, any business may be transacted that might have been transacted at the original meeting.

Why did I receive notice in the mail regarding the Internet availability of proxy materials instead of a full set of proxy materials?

The Securities and Exchange Commission (SEC) permits us to furnish proxy materials by providing access to those documents on the Internet. Stockholders will not receive printed copies of the proxy materials unless they request them. The notice instructs you as to how to submit your proxy on the Internet. If you would like to receive a paper or email copy of the proxy materials, you should follow the instructions in the notice for requesting those materials.

How do I vote if shares are held in my name?

If the shares of our common stock are held in your name, you may vote on matters to come before the meeting in three ways:

Your shares will be voted as you indicate. If you return a proxy card but you do not indicate your voting preferences, then the proxies named on the proxy card will vote your shares for all of the directors nominated, and for approval of Items 2 and 3. Should any other matter requiring a vote of stockholders arise, the stockholders confer upon the proxies discretionary authority to vote the shares represented by such proxy on any such other matter in accordance with their best judgment. All of the proxies are our officers.

How do I vote if I hold my shares through a broker, bank or other nominee?

Stockholders whose shares of our common stock are held in street name must either direct the record holder of their shares as to how to vote their shares of our common stock or obtain a proxy from the

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record holder to vote at the meeting. These stockholders should check the voting instruction cards used by their brokers or nominees for specific instructions on methods of voting, including by telephone or using the Internet.

How do I vote shares I hold in the 401(k) plan?

If you are one of our employees who holds common stock through the PCA Employee Stock Ownership Plan (which holds the PCA Common Stock Fund in both the Packaging Corporation of America Retirement Savings Plan for Salaried Employees and the Packaging Corporation of America Thrift Plan for Hourly Employees), you will receive from the plan trustee a request for voting instructions with respect to the shares of our common stock representing your proportionate interest in the plans. You are entitled to direct the plan trustee how to vote your proportionate interest of shares in those plans.

Greatbanc Trust Company (“GTC”) has the responsibility for monitoring the continued investment of PCA common stock held in the plans. GTC is an investment advisor under the Investment Advisors Act of 1940. If you do not elect to vote the proportionate interest of shares you hold in the plans, those shares will be voted by GTC, in its discretion.

How do I change my vote?

If your shares are held in your name, you may revoke your proxy at any time before it is exercised by:

If your shares are held in street name, you must contact your broker or nominee to revoke your proxy. In either case, your last vote will be the vote that is counted.

If your shares are held in the 401(k) plans, you may revoke your previously given voting instructions by filing with Computershare Trust Company, N.A., the tabulator of votes and our transfer agent, either a written notice of revocation or a properly completed and signed voting instruction card bearing a later date. Computershare must receive the notice of revocation or the voting instruction card no later than May 7, 2026.

What vote is required to approve each item?

Election of Directors. The election of directors at the 2026 annual meeting will be an uncontested election. A “majority of the vote” of the shares present in person or represented by proxy and entitled to vote at the meeting is required for the election of each director (Item 1). Pursuant to our bylaws, a “majority of the vote” is achieved in an uncontested director election if a director receives more votes “for” than “against” his or her election, with abstentions and broker non-votes disregarded.

Other Matters. The affirmative vote of the majority of the votes present in person or represented by proxy and entitled to vote at the meeting is required to approve the matters in Items 2 and 3. If a stockholder abstains from voting or directs the stockholder’s proxy to abstain from voting on the matters, the shares are considered present at the meeting for such matters, but since they are not affirmative votes for the matters, they will have the same effect as votes against the matters. On the other hand, shares resulting in broker non-votes, if any, are not entitled to vote for such matter and will have no effect on the outcome of the vote.

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What happens if a nominee for director does not receive a majority of the vote in an uncontested election?

All nine nominees for election to the board of directors at the 2026 annual meeting are incumbent directors currently serving on the board and the election is uncontested. An incumbent director nominee who does not receive the necessary number of votes to be elected at the annual meeting would, under Delaware law, continue to serve on the board as a “holdover director.” However, under our bylaws, any director who fails to receive the necessary number of votes to be elected must tender his or her resignation to the board promptly. Our independent directors (excluding the director who tendered the resignation) would be required to determine whether to accept or reject the resignation, or whether to take any other action. The board would then act on the tendered resignation and publicly disclose its decision within 90 days following certification of the stockholder vote.

Who will be tabulating and certifying votes at the meeting?

We have engaged Computershare Trust Company, N.A., our transfer agent, to serve as the tabulator of votes and a representative of Computershare to serve as inspector of election and certify the votes.

How are we soliciting this proxy?

We are soliciting this proxy on behalf of our board of directors by mail and will pay all expenses associated with this solicitation. We have retained Georgeson Inc. to aid in the solicitation of proxy materials for a fee of $13,500 plus expenses. In addition to mailing these proxy materials, certain of our officers and other employees may, without additional compensation, solicit proxies by further mailing or personal conversations, or by telephone, facsimile or other electronic means. We will also, upon request, reimburse brokers and other persons holding stock in their names, or in the names of nominees, for their reasonable out-of-pocket expenses for forwarding proxy materials to the beneficial owners of our common stock and to obtain proxies.

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE

2026 ANNUAL MEETING OF STOCKHOLDERS TO BE HELD ON MAY 12, 2026

This proxy statement and our 2025 Annual Report to Stockholders are available at www.edocumentview.com/PKG

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ELECTION OF DIRECTORS

ITEM NO. 1 ON PROXY CARD

Our board currently has ten directors. The nine nominees named below are proposed to be elected at the annual meeting to serve until the 2027 Annual Meeting of Stockholders and until their successors are elected and qualified. All of the nominees have been nominated for election by our board of directors upon the recommendation of the nominating and governance committee of the board of directors.

A properly submitted proxy will be voted by the persons named on the proxy card for the election of each nominee, unless you vote against the nominee or abstain. If elected, each nominee will serve until the expiration of his or her term and his or her successor is elected and qualified or until his or her earlier resignation, removal or death. Each of the nominees is willing to serve if elected, and the board of directors has no reason to believe that any of the nominees will be unavailable for election. If such a situation should arise, the proxy will be voted in accordance with the best judgment of the proxy holder for such person or persons as may be designated by the board of directors, unless the stockholder has directed otherwise.

Set forth below is information regarding each nominee. Standing for election are:

Mark W. Kowlzan is 71 years old and has served as Chief Executive Officer and a director of PCA since July 2010 and as Chairman since January 2016. From 1998 through June 2010, Mr. Kowlzan led PCA’s containerboard mill system, first as Vice President and General Manager and then as Senior Vice President—Containerboard. From 1996 through 1998, Mr. Kowlzan served in various senior operating positions with PCA in its mill operations, including as manager of the Counce, Tennessee linerboard mill. Prior to joining PCA, Mr. Kowlzan spent 15 years at International Paper Company, where he held a series of operational and managerial positions within its mill organization. Mr. Kowlzan has been a member of the board of directors of American Forest & Paper Association since February 2011. Mr. Kowlzan was chosen to serve on our board primarily for his extensive leadership and technical expertise in the paper and packaging industries and his familiarity with our business through his leadership of our containerboard mill system and our company. Mr. Kowlzan self identifies as a Caucasian male.

Cheryl K. Beebe is 70 years old and has served as a director of PCA since May 2008. From February 2004 until her retirement in February 2014, Ms. Beebe served as the Chief Financial Officer of Ingredion Incorporated (formerly named Corn Products International, Inc.), a manufacturer and seller of a number of ingredients to food and industrial customers. Ms. Beebe previously served Ingredion as Vice President, Finance from July 2002 to February 2004, as Vice President from February 1999 to 2004 and as Treasurer from 1997 to February 2004. From 1980 to 1997, she served in various financial positions of increasing responsibility for Corn Products. Ms. Beebe is a member of the board of directors of The Mosaic Company and served on the boards of directors of Convergys Corporation and Hanesbrands, Inc. during the past five years. Ms. Beebe is a trustee of Goldman Sachs Asset Management funds. Ms. Beebe was chosen to serve on our board primarily for her experience as a chief financial officer of a public company, her extensive financial and accounting background, and her knowledge of the manufacturing industry and the strategic and business issues and risks similar to those facing PCA. Ms. Beebe self identifies as a Caucasian female.

Duane C. Farrington is 67 years old and has served as a director of PCA since August 2015. Mr. Farrington was employed by State Farm Mutual Automobile Insurance Company from 1980 until his retirement in 2020. He served State Farm as Senior Vice President for Sales and Operations in the mid-Atlantic operation from 2005 to 2008. He moved to the corporate headquarters in 2009 and was

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named Executive Vice President and Chief Administrative Officer in 2013 and served in such position until he retired in 2020. In his State Farm senior leadership role, he had overall responsibility for the organization’s information technology, systems and business integration, information security, and innovation functions. Mr. Farrington earned the Chartered Property Casualty Underwriter (CPCU) designation in 1995. Mr. Farrington was chosen to serve on our board primarily because of his extensive experience with information technology and security, as well as his business experience gained from 40 years of service at State Farm. Mr. Farrington self identifies as an African-American male.

Karen E. Gowland is 67 years old and has served as a director of PCA since May 2024. Before her retirement in March 2014, Ms. Gowland was Vice President, General Counsel, and Corporate Secretary for Boise Inc, a manufacturer of packaging and paper products, from February 2008 to July 2010 and Senior Vice President, General Counsel and Corporate Secretary from July 2010 until we acquired Boise in October 2013. From October 2004 to February 2008, Ms. Gowland served as Vice President, General Counsel, and Corporate Secretary of Boise Cascade, L.L.C. During her 30 years in the forest products, paper and packaging industries, Ms. Gowland held various legal and compliance positions, which included over 15 years of experience as a corporate secretary for various public and private entities. Ms. Gowland currently serves on the board of directors of Boise Cascade Company, a producer of engineered wood products and plywood and a distributor of building products. Ms. Gowland was chosen to serve on our board due to her relevant experience as an executive in our industry, including serving as a general counsel addressing risks and issues similar to those we face, as well as her background in governance and compliance matters. Ms. Gowland self identifies as a Caucasian female.

Donna A. Harman is 66 years old and has served as a director of PCA since December 2019. She served as President and Chief Executive Officer of American Forest and Paper Association (AF&PA), the national trade association of the paper and wood products industries, from 2007 until her retirement in 2019. Earlier in her career, she held positions as AF&PA’s Senior Vice President, Policy and Government Affairs, served in governmental affairs for Champion International Corporation and The Dow Chemical Company and served as a legislative assistant in Congress. Ms. Harman is the 2019 recipient of the Bryce Harlow award, which recognizes her exemplary career in business-government relations. Ms. Harman was chosen to serve on our board primarily for her considerable experience with sustainability, public policy matters relevant to our industry and senior leadership experience, through her service as president of AF&PA for more than a decade. Ms. Harman self identifies as a Caucasian female.

Robert C. Lyons is 62 years old and has served as a director of PCA since August 2011. Mr. Lyons has served as President and Chief Executive Officer of, and has served on the board of directors of, GATX Corporation, a rail, marine and industrial equipment leasing company, since April 2022. Prior to that, Mr. Lyons served as Executive Vice President and President—Rail North America of GATX Corporation from August 2018 to April 2022 and as Chief Financial Officer of GATX from November 2004 to August 2018. Mr. Lyons has been employed by GATX since 1997 and served in various positions of increasing responsibility through 2004. Prior to his employment with GATX, Mr. Lyons worked for the Financial Relations Board and in the corporate banking division of The Bank of Tokyo- Mitsubishi. Mr. Lyons was chosen to serve on our board primarily for his extensive financial and accounting background, experience as a chief executive officer, business unit leader and chief financial officer of a public company, and his familiarity with strategic and business issues and risks for companies similarly situated to PCA. Mr. Lyons self identifies as a Caucasian male.

Samuel M. Mencoff is 69 years old and has served as a director of PCA since January 1999 and served as Vice President of PCA from January 1999 through January 2000. Mr. Mencoff has been employed principally by Madison Dearborn Partners, LLC, a private equity firm, since 1993 and

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currently serves as Senior Advisor, after having served as Co-Chief Executive Officer from 2008 to 2023. From 1987 until 1993, Mr. Mencoff served as Vice President of First Chicago Venture Capital. Mr. Mencoff was chosen to serve on our board primarily for his substantial operational and financial experience gained from the acquisition and management of similarly-situated portfolio companies during his career at Madison Dearborn. Mr. Mencoff self identifies as a Caucasian male.

Roger B. Porter is 79 years old and has served as a director of PCA since May 2005. Mr. Porter is currently the IBM Professor of Business and Government at Harvard University and has served on the faculty at Harvard University since 1977. Mr. Porter also held senior economic policy positions in the Gerald Ford, Ronald Reagan and George H.W. Bush White Houses, serving as special assistant to the President and executive secretary of the Economic Policy board from 1974 to 1977, as deputy assistant to the President and director of the White House Office of Policy Development from 1981 to 1985, and as assistant to the President for economic and domestic policy from 1989 to 1993. Mr. Porter served as a director of Extra Space Storage Inc. during the last five years. Mr. Porter was chosen to serve on our board primarily for his perspectives and insights gained through his significant business, governmental and public policy experience. Mr. Porter self identifies as a Caucasian male.

Thomas S. Souleles is 57 years old and has served as a director of PCA since September 2010, and previously served on PCA’s Board of Directors from 1999 to 2008. Mr. Souleles has been employed principally by Madison Dearborn Partners, LLC, a private equity firm, since 1995 and currently serves as Vice Chairman, to which he was appointed in 2024 after having served as Co-Chief Executive Officer, to which he was appointed in 2023, and previously as Managing Director concentrating on investments in the basic industries sector. Mr. Souleles was chosen to serve on our board primarily for his substantial operational and financial experience gained from the acquisition and management of similarly-situated portfolio companies, including several in the paper and forest products industry during his career at Madison Dearborn and his expertise in financial analysis. Mr. Souleles self identifies as a Caucasian male.

Member of the Current Board Not Standing for Re-Election

Paul T. Stecko is 81 years old and has served as a director of PCA since March 1999, including as Chairman from March 1999 through December 2015. He served as a Senior Advisor to PCA from December 2015 through the end of 2017. He served as Executive Chairman of PCA from July 2010 until his retirement as an officer and employee of the company in December 2013. Mr. Stecko served as Chief Executive Officer of PCA from January 1999 to July 2010. From January 1997 to April 1999, Mr. Stecko served as Chief Operating Officer of Tenneco Inc. From December 1993 through January 1997, Mr. Stecko served as President and Chief Executive Officer of Tenneco Packaging Inc. Prior to joining Tenneco Packaging, Mr. Stecko spent 16 years with International Paper Company.

The board of directors unanimously recommends a vote

FOR the election of each of the nine director nominees.

Determination of Director Independence

Our corporate governance guidelines provide that a majority of the board of directors shall consist of independent directors. All of our directors other than Mark W. Kowlzan, our Chairman and Chief Executive Officer, and Paul T. Stecko, our former Chairman and Chief Executive Officer who served as an executive officer from 1999 to 2013 and in an advisory capacity through the end of 2017, are independent and not employed by us. In determining independence of those directors, the nominating and governance committee conducts an annual review and reports its findings to the full board. The nominating and governance committee determines if any material relationships exist that would impair the independence of any of the non-employee directors and makes a recommendation to the board as to the independence of the directors.

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A director may not qualify as independent unless the board of directors affirmatively determines that the director has no material relationship with us. The board of directors has not adopted categorical standards of materiality for independence purposes (other than those set forth in the New York Stock Exchange (“NYSE”) listing standards). In connection with the review performed at its February 25, 2026, meeting, the committee and the board were not aware of any relationship that would disqualify any nominee for director, other than Mr. Kowlzan, our current Chief Executive Officer, from being independent. The board and the nominating and governance committee considered the following relationships in making its determination:

Madison Dearborn Partners, which employs Mr. Souleles as Vice Chairman and previously as Co-Chief Executive Officer, is a private equity firm that has investments in companies that may purchase products or services from, or provide products and services to, us in the ordinary course of business in amounts that are not material in amount or significance. Mr. Souleles is not compensated directly or indirectly as a result of any such transactions, does not otherwise have an interest in such transactions and is not involved in any manner in such transactions. Accordingly, we do not consider any such transactions to impair his independence. As Mr. Souleles may be deemed to beneficially own more than 10% of certain portfolio companies, we report certain of these transactions under “Transactions with Related Persons” elsewhere in this proxy statement. Mr. Mencoff serves as Senior Advisor to Madison Dearborn, which is a non-executive position, after having served as Co-Chief Executive Officer through May 2023.

We purchase services in the ordinary course of business from GATX Corporation, which currently employs Mr. Lyons as President and Chief Executive Officer. The amount of 2025 purchases was approximately $310,000, which is less than 0.1% of the 2025 sales of each of GATX and PCA. Mr. Lyons is not directly involved in, and is not compensated as a result of, this business relationship. Accordingly, the board determined that this business relationship was not a material relationship between Mr. Lyons and PCA, and determined him to be independent and eligible to serve on the audit committee.

Ms. Gowland was employed by Boise, Inc. (“Boise”) prior to her retirement in March 2014. We acquired Boise Inc. in October 2013. Between the time of the acquisition and her retirement, she served in a non-executive position, after having served as Senior Vice President, General Counsel and Secretary of Boise. She does not receive any compensation from us other than directors fees for serving on our board and pension and retirement benefits attributable to prior service with Boise. Due to the substantial length of time since her employment with Boise, that she did not serve in an executive capacity after we acquired Boise and that she has only received retirement benefits that are not contingent on present or future service, the board determined that she does not have a material relationship with us and is an independent director.

Based on the report and recommendation of the nominating and governance committee, the board of directors has determined that the following directors and nominees, which constitute eight of the nine nominees for election to the board, are independent: Cheryl K. Beebe, Duane C. Farrington, Karen E. Gowland, Donna A. Harman, Robert C. Lyons, Samuel M. Mencoff, Roger B. Porter, and Thomas S. Souleles.

2025 Board of Directors Meetings

The board met six times during 2025. All nominees for election at the 2026 annual meeting attended all of the meetings of the board and the committees on which he or she was a member held during the year. All of our directors attended the 2025 Annual Meeting of Stockholders in person or by teleconference, and all of our directors are expected to attend the 2026 Annual Meeting of Stockholders.

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Leadership Structure

Effective January 1, 2016, the board determined to combine the roles of Chairman and Chief Executive Officer because of the efficiency and effectiveness of board conduct and proceedings gained from Mr. Kowlzan’s familiarity with our operations as a result of serving as chief executive officer and a director, enabling the board to focus on the most relevant decisions, issues and risks involving the company. As the company’s strategy focuses on operational excellence and capital allocation to further such operational excellence, the board believes that familiarity with company operations is important to board leadership, which is achieved under the current leadership structures.

To help maintain a strong and appropriate independent director presence, the independent members of the board have elected Mr. Mencoff as the “lead director.” The lead director is an independent director elected by the independent directors on the board. In addition to presiding at executive sessions of independent directors, the lead director has the responsibility to: coordinate with the chairman regarding the establishment of the agenda and topics for board and stockholder meetings; retain independent advisors on behalf of the board as the board may determine is necessary or appropriate; serve as a liaison between the management directors and independent directors when circumstances dictate; participate actively in any recruitment of new directors; regularly meet with the CEO to provide board feedback; and perform such other functions as the independent directors may designate from time to time. The independent directors meet in executive sessions at every regularly scheduled board meeting and otherwise as necessary.

Risk Management

Issues relating to risk management are regularly discussed among management, the board and the audit committee. Financial risks, including risks relating to our internal controls, as well as information technology system-related risks are presented to, and discussed with the audit committee, including through our annual internal control assessment, periodic internal audit reports and through the annual internal audit plan. The company’s compliance program objectives and achievements are also discussed at least quarterly with the audit committee and annually with the full board. Business and operational risks are discussed with the board at every regularly scheduled meeting through the review of our performance, our business and industry operating conditions and our strategic direction. Management, through the chief financial officer, our internal audit department, our chief technology officer, our general counsel and our chairman and chief executive officer, periodically presents and discusses with the board risk assessments focusing on the key risks to PCA. The most recent presentation and discussion occurred at the May 7, 2025 board meeting and the next presentation and discussion is scheduled for the May 12, 2026 board meeting. Key topics discussed during the year included the assessment of our environmental, health and safety management and compliance programs, insurance and risk management, our legal compliance programs and objectives, cybersecurity risks, compensation policies and our management of key business and operating risks.

Board Committees

The board has standing nominating and governance, compensation, audit and sustainability committees. As required under NYSE rules and the committee charters, each of the nominating and

governance, compensation and audit committees consists solely of independent directors. Additional committee service eligibility requirements for audit committee members and compensation committee members are set forth in the committee charters and described below.

Nominating and Governance Committee

Mr. Porter (Chair), Ms. Gowland, Mr. Mencoff, and Mr. Souleles serve on the nominating and governance committee. The nominating and governance committee met two times during 2025.

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The nominating and governance committee’s primary responsibilities include, among other things:

The committee leads our board recruiting and nominating efforts, as well as annual performance evaluations of the board, its committees and its members. Areas covered include quality of information provided to the board, the quality of interaction between the board and management, the frequency of meetings of the board and the overall effectiveness of board proceedings, conduct and leadership.

The nominating and governance committee seeks to identify as candidates for director persons from various backgrounds, with a variety of life experiences, with a reputation for integrity and good business judgment, and who have experience in highly responsible positions in professions or industries relevant to the conduct of our business. In selecting potential new candidates, the committee will take into account the current composition of the board and the extent to which a candidate’s particular expertise and experience will complement the expertise and experience of other directors.

The committee does not target a specified percentage of gender or racially diverse members and endeavors to include racially or gender diverse candidates in the pool of available candidates in any director search. The committee believes that the diversity that exists in the board composition is a benefit to PCA, and, in accordance with its recruitment policy, will continue efforts to recruit candidates from a pool that includes qualified diverse candidates when openings on the board exist.

Among other things, the primary skills and experience sought by the committee and the board include relevant leadership or technical experience in the paper and packaging sectors, expertise in capital allocation and decision making, senior leadership experience in complex business environments, sustainability experience, governance or public policy experience and experience in finance, auditing and accounting and information technology systems and security experience. Multiple board members possess each of these attributes. Accordingly, the committee believes that the board nominees collectively satisfy the objectives described above, and recommended the nomination of each member for an additional term.

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The table below lists the skills and experience gained through prior business experience that we consider important in light of our current business strategy and structure and the self-identified gender and race of each director nominee by EEO-1 Classification:

Skill/Experience

Leadership or Technical Experience in the Paper / Packaging Sectors

X

X

X

Expertise in Capital Allocation and Decision Making

X

X

X

X

X

X

Senior Leadership Experience in Complex Business Environments

X

X

X

X

X

X

X

X

X

Sustainability Experience

X

X

X

Governance or Public Policy Experience

X

X

X

Finance, Auditing and Accounting Experience

X

X

X

X

Information Technology Systems and Security Experience

X

X

X

Gender

Male

X

X

X

X

X

X

Female

X

X

X

Race/Ethnicity

White

X

X

X

X

X

X

X

X

Hispanic

Black or African American

X

Asian

Native Hawaiian or other Pacific Islander

American Indian or Alaska Native

Two or more races

We have not established term limits or a mandatory retirement age from our board and we believe that the tenure of our board benefits our company and our shareholders. As our board is focused on our strategic goal of operational excellence and capital allocation in furtherance of more efficient and productive operations and customer service, it is important for board members to have a high degree of familiarity with our operations. We believe that experience gained from board service promotes this objective and has helped lead to a well-functioning and highly performing board, driving strong company performance that generates shareholder value, with PCA’s total stockholder return nearly doubling the return of the S&P 500 over the median tenure of our board members. The median tenure of our board members standing for re-election is 16 years.

For more information on consideration of nominees for our board, see “Other Information—Recommendations for Board Nominated Director Nominees.” The written charter of the nominating and governance committee is available on PCA’s website at www.packagingcorp.com under the section Investors—Corporate Governance.

Compensation Committee

Mr. Souleles (Chair), Ms. Gowland, Mr. Mencoff, and Mr. Porter serve on the compensation committee. Each member of the compensation committee must satisfy all independence standards applicable to compensation committee members as set forth in the rules of the SEC and the listing standards of the New York Stock Exchange. The committee must have at least two members who qualify as “non-employee directors” pursuant to SEC Rule 16b-3. As composed, the committee satisfies these standards. The committee met six times during 2025.

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The compensation committee’s primary responsibilities include, among other things:

The committee maintains a compensation subcommittee, which currently consists of Ms. Gowland (Chair), Mr. Porter and Mr. Mencoff. This subcommittee has the responsibility of considering and awarding equity compensation that is intended to qualify to the “short swing trading” exemption provided by Rule 16b-3 under the Securities Exchange Act of 1934.

The written charters of the compensation committee and the subcommittee are available on PCA’s website at www.packagingcorp.com under the section Investors—Corporate Governance.

The agenda for meetings of the committee and the subcommittee is determined by its chairman with the assistance of our compensation consultant, general counsel and corporate secretary and our human resources department. Mr. Kowlzan regularly attends meetings along with members of our human resources department. Due to his familiarity with our compensation history, philosophy and objectives, Mr. Stecko also attends meetings of the committee by invitation. At meetings in which compensation decisions are made for the executive officers, the committee or subcommittee meets in executive session with no members of management present. For compensation matters on which the board acts, the chairman of the committee or subcommittee reports the recommendations on executive compensation to the board. Independent advisors and the human resources department support the committee and the subcommittee in their duties and may be delegated authority to fulfill certain administrative duties regarding the compensation programs. The committee has authority under its charter to retain, approve fees for and terminate advisors, consultants and agents, as it deems necessary to assist in the fulfillment of its responsibilities. Before engaging compensation consultants, independent legal counsel and other compensation advisors, the committee will assess the independence of any such persons, taking into consideration all factors relevant to that person’s independence from management.

Compensation Committee Interlocks and Insider Participation

The compensation committee is composed of directors who are not our employees and have not served as an officer. None of our executive officers serve as a member of the board of directors or compensation committee of any entity that has one or more executive officers serving on our board or compensation committee.

Madison Dearborn Partners, which employs Mr. Souleles as Vice Chairman and previously as Co-Chief Executive Officer, is a private equity firm that has investments in companies that may purchase products or services from, or provide products and services to, us in the ordinary course of business in amounts that are not material in amount or significance. Mr. Souleles is not compensated directly or indirectly as a result of any such transactions, does not otherwise have an interest in such transactions and is not involved in any manner in such transactions. As Mr. Souleles may be deemed to beneficially own more than 10% of certain portfolio companies, we report certain of these

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transactions under “Transactions with Related Persons” elsewhere in this proxy statement. Mr. Mencoff serves as Senior Advisor to Madison Dearborn, which is a non-executive position, after having served as Co-Chief Executive Officer through May 2023.

Audit Committee

Ms. Beebe (Chair), Mr. Farrington, Ms. Harman and Mr. Lyons serve on the audit committee. Each member of the audit committee must be financially literate as required under the NYSE listing standards and meet the heightened independence standards required for audit committee members under SEC rules and the NYSE listing standards. All committee members were determined to satisfy these standards. The board of directors has determined that each of Ms. Beebe and Mr. Lyons is an “audit committee financial expert” within the meaning of SEC rules. The committee met ten times during 2025.

The audit committee’s primary responsibilities include, among other things:

Both the independent registered public accounting firm and the internal auditors regularly meet privately with the audit committee and have unrestricted access to the audit committee. The committee meets with the internal auditors and the independent registered public accounting firm, with and without management present, to discuss the results of their examinations, their evaluations of our internal controls and the overall quality of our financial reporting.

The written charter of the audit committee is available on our website at www.packagingcorp.com under the section Investors—Corporate Governance.

Sustainability Committee

Ms. Harman (chair), Mr. Farrington, Mr. Kowlzan, and Mr. Porter serve on the sustainability committee. The sustainability committee met four times during 2025. The sustainability committee’s primary responsibilities include, among other things:

The written charter of the sustainability committee is available on our website at www.packagingcorp.com under the section Investors—Corporate Governance.

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Communication with the Board of Directors

Interested parties, including stockholders, may communicate directly with the lead director, the chairman of the audit committee, the board of directors or the independent directors as a group by writing to those individuals or the group at the following address: c/o S. Ellis Cunningham, Corporate Secretary, Packaging Corporation of America, 1 N. Field Court, Lake Forest, IL 60045. Correspondence will be forwarded to the appropriate person or persons. When reporting a concern, please supply sufficient information so that the matter may be addressed properly. Although you are encouraged to identify yourself to assist us in effectively addressing your concern, you may choose to remain anonymous, and we will use our reasonable efforts to protect your identity to the extent appropriate or permitted by law. In addition, employees may communicate confidentially any concerns related to our accounting, internal accounting controls or auditing matters, business principles or policies, or suspected violations, by calling the toll-free help line established by us. The toll-free help line is monitored by non-PCA personnel and all calls are communicated to our corporate security department. Any complaints regarding accounting, internal controls or auditing matters are forwarded directly to the chairman of the audit committee and the chief financial officer.

Code of Ethics

All of our employees, including all officers, are required to abide by our Code of Ethics and Business Conduct. Also, separate Codes of Ethics for our executive officers and principal accounting personnel, as well as our directors, are in place to help ensure that our business is conducted in a consistently legal and ethical manner. These documents cover all areas of professional conduct, including employment policies, conflicts of interest, fair dealing and the protection of confidential information, as well as strict adherence to all laws and regulations applicable to the conduct of our business. We conduct regular training on the Code for our officers and employees. The full text of our Code of Ethics and Business Conduct and the Codes of Ethics are published on our website at www.packagingcorp.com under the section Investors—Corporate Governance.

We will disclose future amendments to, or waivers from, certain provisions of these Codes of Ethics for executive officers and directors on our website within four business days following the date of such amendment or waiver, if they occur.

Corporate Governance Guidelines

We have in place Corporate Governance Guidelines governing the function and performance of the board and its committees, which, among other things, sets forth the qualifications and other criteria for director nominees. The current guidelines appear on our website at www.packagingcorp.com under the section Investors—Corporate Governance.

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RATIFICATION OF APPOINTMENT OF THE INDEPENDENT REGISTERED PUBLIC

ACCOUNTING FIRM

ITEM NO. 2 ON PROXY CARD

The audit committee has appointed KPMG LLP as the independent registered public accounting firm to serve as our auditors for the year ending December 31, 2026, and has further directed that we submit the selection of the independent registered public accounting firm for ratification by the stockholders at the annual meeting. Representatives of KPMG LLP are expected to be present at the meeting. They will have the opportunity to make a statement if they wish to do so and will be available to respond to appropriate questions.

Stockholder Ratification

We are not required to submit the appointment of KPMG LLP for ratification by our stockholders. However, we are doing so as a matter of good corporate practice. If the stockholders do not ratify the appointment, the audit committee will reconsider whether or not to retain that firm. Even if the selection is ratified, the audit committee in its discretion may direct the appointment of a different independent registered public accounting firm at any time during the year if the committee determines that such an appointment would be in our best interests and that of our stockholders.

The board of directors, based upon the recommendation of the audit committee, unanimously recommends a vote FOR the ratification of the appointment of KPMG LLP as the independent registered public accounting firm to serve as PCA’s auditors for 2026.

Fees to the Independent Registered Public Accounting Firm

Audit Fees. Fees to KPMG LLP for audit services totaled approximately $3,875,000 for 2024 and $4,705,000 for 2025, including, fees associated with the annual audit (including internal control reporting), reviews of our quarterly reports on Form 10-Q and accounting consultations, and, in 2025, fees associated with a registered public offering of debt, including delivery of a comfort letter to the underwriters, and procedures related to the Greif, Inc. acquisition.

Audit-Related Fees. Fees to KPMG LLP for audit-related services totaled approximately $16,000 for both 2024 and 2025.

Tax Fees. Tax fees include fees for tax compliance, tax advice and tax planning services. We did not pay any tax fees to KPMG LLP in 2024 or 2025.

All Other Fees. We did not pay any other fees to KPMG LLP in 2024. In 2025, we paid approximately $110,000 associated with sustainability reporting readiness assessments and related services.

Audit Committee Pre-Approval Policy for Audit and Non-Audit Services

Pursuant to its written charter, the audit committee is responsible for adopting, and has adopted, a policy to pre-approve all audit and permitted non-audit services to be performed for us by the independent registered public accounting firm. Prior to engagement of the independent registered public accounting firm for the next year’s audit, we or the independent registered public accounting firm submit to the committee for approval an aggregate request of services expected to be rendered during that year for each of the four categories of services outlined above. Prior to engagement, the committee pre-approves these services by category of service. The fees are budgeted and the committee requires the independent registered public accounting firm and us to report actual fees versus the budget periodically throughout the year by category of service. During the year,

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circumstances may arise when it may become necessary to engage the independent registered public accounting firm for additional services not contemplated in the original pre-approval. In those instances, the audit committee requires specific pre-approval before engaging the independent registered public accounting firm. The committee may delegate pre-approval authority to one or more of its members. The member or members to whom such authority is delegated must report, for information purposes only, any pre-approval decisions to the entire audit committee at its next scheduled meeting.

Report of the Audit Committee

The following report does not constitute soliciting material and should not be deemed filed or incorporated by reference into any other PCA filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent that we specifically incorporate this report.

Management is responsible for PCA’s internal controls and the financial reporting process. The independent registered public accounting firm has the responsibility for performing an audit of our financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States) and for expressing an opinion on those financial statements based on its audit as well as expressing an opinion on the effectiveness of internal control over financial reporting. The audit committee reviews these processes on behalf of the board of directors.

In connection with the financial statements for the year ended December 31, 2025, the audit committee has:

Based upon these reviews and discussions, the audit committee recommended to the board of directors at its February 25, 2026 meeting that PCA’s audited financial statements be included in the Annual Report on Form 10-K for the year ended December 31, 2025 for filing with the Securities and Exchange Commission. Upon recommendation of the audit committee, the board approved such inclusion.

The Audit Committee

Cheryl K. Beebe, Chair

Duane C. Farrington

Donna A. Harman

Robert C. Lyons

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PROPOSAL ON EXECUTIVE COMPENSATION

ITEM NO. 3 ON PROXY CARD

We are requesting our stockholders to approve an advisory resolution on the compensation for our named executive officers, which is more fully described in this proxy statement. Please refer to the “Compensation Discussion and Analysis” and “Executive Officer Compensation” sections of this proxy statement immediately following to find information regarding the compensation paid to our named executive officers and a complete discussion of our compensation program.

We believe that our compensation is appropriate to further our business objectives, is competitive and aligns the interests of management and our stockholders. We believe that our program has been a key factor in the successful management of our company, driving our consistently strong performance in the paper and packaging industry. We discuss our compensation philosophy, the elements of compensation and our compensation decisions in more detail in the “Compensation Discussion and Analysis.”

We are asking stockholders to approve the following advisory resolution at the 2026 Annual Meeting:

RESOLVED, that the stockholders approve, on an advisory basis, the compensation of PCA’s named executive officers as disclosed in the Proxy Statement for the Company’s 2026 Annual Meeting of Stockholders pursuant to the compensation disclosure rules of the Securities and Exchange Commission, including the Compensation Discussion and Analysis, the Summary Compensation Table and the related compensation tables.

This advisory resolution, commonly referred to as a “say-on-pay” resolution, is non-binding on the board of directors and the company. Although non-binding, we will carefully review and consider the voting results when evaluating our executive compensation program. Our current policy is to include an advisory resolution to approve the compensation of our named executive officers annually. Accordingly, unless we modify our policy on the frequency of future “say on pay” votes, the next advisory vote to approve our executive compensation will occur at the 2027 Annual Meeting of Stockholders.

The board of directors, based upon the recommendation of the compensation committee, unanimously recommends a vote FOR the approval of the advisory resolution approving our executive compensation.

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COMPENSATION DISCUSSION AND ANALYSIS

Compensation Objectives

The compensation committee of our board of directors oversees the executive compensation program. The committee intends for the program to accomplish the following:

The committee believes that these objectives have been accomplished consistently, with the company’s management driving strong performance and substantial returns for our investors since our inception.

2025 Summary

PCA had a strong year in 2025, despite experiencing some challenging business conditions. We completed the acquisition of the Greif business and achieved significant progress on integration and improving operations. During the fourth quarter of 2025, we announced our plan to reconfigure the Wallula, Washington mill, which will streamline operations at the facility and significantly lower our cost of production beginning in 2026. We successfully completed several other capital and operational projects to improve our capabilities and efficiency in our packaging business. We grew our net sales from $8.4 billion in 2024 to $9.0 billion in 2025, and our earnings, excluding special items¹, from $9.04 per share in 2024 to $9.84 per share in 2025.

By all measures, we remain financially strong. We generated approximately $1.6 billion of operating cash flow and, after approximately $829 million of capital expenditures which included substantial reinvestment in growth opportunities for our business, $729 million of free cash flow². We ended the year with $668 million of cash and marketable securities and liquidity of $1.2 billion. We continue to have a strong balance sheet, and we have the flexibility to take advantage of internal and external investment opportunities that generate shareholder value and to continue to return significant value to shareholders.

¹ Earnings per share excluding special items is a Non-GAAP financial measure, which we present throughout this proxy statement. Important information relating to our use of Non-GAAP financial measures and a reconciliation of this Non-GAAP financial measure to the most comparable financial measure presented in accordance with Generally Accepted Accounting Principles (GAAP) is included in our Annual Report on Form 10-K for the year ended December 31, 2025 (the “2025 Form 10-K”) in “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures.”

² Free cash flow is a Non-GAAP financial measure, which we calculate by subtracting our “Additions to Property, Plant and Equipment” of $828.9 million as reported on our Consolidated Statement of Cash Flows included in our audited financial statements in the 2025 Form 10-K (the “Statement of Cash Flows”) from our “Net cash provided by operating activities” of $1,557.5 million reported in the Statement of Cash Flows.

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PCA’s performance has rewarded its shareholders with significant long-term growth. Through the end of 2025, PCA’s one, three and five year cumulative total stockholder return (assuming reinvestment of dividends) is as follows:

2025 Compensation Program Summary

We regularly review our compensation program and structure, both to assure appropriate incentives to drive industry-leading performance and alignment with the expectations of our shareholders. During 2025, FW Cook served as our compensation committee’s independent consultant and, among other things, assisted with the ongoing review and assessment of our compensation practices. PCA annually reviews its compensation against a peer group in terms of amount and structure. We did not make significant changes to the overall program during the year.

PCA’s compensation program emphasizes long-term performance, with equity awards comprising the majority of compensation for all of our named executive officers and with two-thirds of those awards subject to the achievement of rigorous long-term performance goals. PCA’s annual incentive compensation is also paid out subject to objective performance measures.

PCA does not contractually entitle any executive officer to severance payments and does not have employment agreements with its officers. We have robust stock ownership guidelines (six times base salary for our CEO), substantial stock ownership among our executive officers and policies to prevent our officers from hedging or pledging stock. Our equity incentive plan prohibits repricing of awards and does not utilize “single trigger” vesting upon a change of control.

Our CEO’s 2025 target awarded compensation and actual awarded compensation were both $16.1 million. “Awarded compensation” includes salary, the grant date fair value of stock awards and the annual cash incentive award. The elements of compensation were as follows:

PCA’s actual awarded compensation for 2025 for our CEO increased approximately 3.9% from 2024 awarded compensation. The increase was primarily due to a higher value of the annual equity award and an increase in base salary.

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2025 Say on Pay Vote

We believe that our compensation practices have historically achieved an appropriate alignment of pay with company performance. Shareholders have overwhelmingly supported our practices, with our “say-on-pay” vote receiving at least 93% votes in favor over each of the last five years, with last year’s say-on-pay vote receiving more than 94% of the vote, excluding abstentions. Our compensation program has largely remained consistent in terms of practices and structure during such five-year period and we did not make material changes to our compensation practices in response to the vote. We consider shareholder expectations generally in light of best compensation practices when making compensation decisions and assessing our compensation program.

Compensation Consultant

During 2025, FW Cook served as the committee’s independent compensation consultant. FW Cook attends meetings of the committee, assesses the company’s compensation practices and advises on the committee’s decision-making process. The committee has the sole authority to retain FW Cook, approve its fees and determine the other terms and conditions of FW Cook’s engagement. FW Cook works solely for the committee and provides no other services to the Company. FW Cook is independent from the company, and FW Cook has attested in writing as to its independence.

Management retains Meridian Compensation Partners (“Meridian”) as a compensation consultant to provide and analyze benchmarking data, provide valuation services, and perform other consulting services as needed. Representatives of Meridian do not attend meetings of the committee.

Comparative Assessments

Consistent with our compensation objectives described above, our executive compensation program is designed to be competitive with the programs that are offered at paper, packaging and related manufacturing companies comparable to us. While comparing our compensation to other companies may not always be totally appropriate due to aspects of our business, these comparisons assist the committee’s decision-making process.

We annually obtain an assessment of the compensation of our named executive officers relative to a group of named executive officers at other peer companies that provides us with information in support of our compensation practices. The assessments include the compilation of compensation data from the peer group companies approved by the committee, and the comparison of the compensation of each of our named executive officers relative to similar officers at the peer group companies.

Compensation is compared to a peer group designed to include: (1) direct industry competitors, (2) companies viewed by PCA and its investors as operating in related paper, packaging, container or forest products industries and that are comparable in size or scope, across such measures as total revenues, taking into account the integrated nature of PCA’s business, and market capitalization; (3) other companies of similar size and scope in the basic materials sector and (4) manufacturing companies of similar size or scope headquartered near the location of PCA’s headquarters. Certain information regarding the peer group used in connection with the assessment of 2025 compensation is as follows:

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³ Berry Global, Inc. was a part of the peer group for 2025, but it was acquired by Amcor plc in an all-stock transaction in 2025. Ashland Global Holdings was removed from the peer group for 2026, as it was the smallest peer by revenue and second-smallest by market capitalization, both below desired size ranges.

⁴ This amount represents revenue for 11 months, due to a change in fiscal year.

PCA’s 2025 revenues are near the median of the group, its market capitalization is around the 75th percentile of the group, its one-year TSR is above the 60th percentile of the group and its three-year TSR is the highest of the group.

Annually, our compensation consultant completes a compensation assessment against the peer group, using the most recently filed proxy statements and public filings to obtain comparative compensation data. The committee uses the assessment to help ensure that our executive compensation is competitive and in line with industry and market practice. The committee also uses these assessments as a guide when determining each element of incentive compensation, the mix of base salary, annual performance-based, cash incentive awards and equity grants within the overall compensation package, and the total compensation compared to the peer group companies. There is no pre-established policy or target for the mix between cash and non-cash, or short and long-term incentive compensation though the substantial majority of compensation awarded to our top two officers is in the form of long-term equity compensation.

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Elements of Compensation

Base Salary

We provide a base salary to attract and retain executive officers and compensate them for their services during the year. Base salary levels are designed to be competitive with peer companies, while taking into account individual experience, performance and accomplishments. Each officer serving as a named executive officer has extensive experience with the company.

Merit-based increases to salaries of named executive officers are generally based on the committee’s assessment of the individual’s performance and are consistent with merit-based increases for the overall salaried employee population. Effective January 1, 2025, base salaries were increased by approximately 3.5% for each named executive officer, consistent with the increases for non-executive employees.

In February 2025, Mr. Shirley was promoted to Executive Vice President, Corrugated Products, and his base salary was increased to $750,000. In February 2025, Mr. Mundy announced his decision to step down as Chief Financial Officer effective May 1, 2025, and he remained employed by PCA in an advisory role through his retirement date of March 1, 2026. On May 1, 2025, Mr. Pflederer was promoted from Senior Vice President, General Counsel and Secretary to Executive Vice President and Chief Financial Officer, and his base salary was increased to $750,000.

Annual Cash Incentive Awards

Overview. Our annual cash incentive award program under our Executive Incentive Compensation Plan (EICP) is designed to motivate performance in the most important aspects of our business. Threshold, target and maximum awards and performance measures to be considered for actual payouts are determined during the year, and payouts are determined based on consideration of actual performance at or around year end. In 2025 and historically, annual earnings per share, excluding special items, served as the performance measure for the annual cash incentive award. We use earnings per share after special items as the performance measure because it measures management’s effectiveness in generating shareholder value, provides a measure of affordability for award payouts and measure management’s effectiveness in running the business against the internal profit plan.

Target Award Levels and Payout Matrix. Target, threshold and maximum award levels are determined based upon our review of competitive information and historical award payouts and the importance to our business of, and our expectations for, the individual positions. The committee has historically considered affordability into its award determination (i.e., higher or lower absolute earnings drive higher or lower potential award payouts). In order to achieve such objective, the committee varies target award levels each year by comparing the year-over-year change in forecasted earnings.

Our maximum 2025 EICP award level was 130% of target awards for each of our officers, down significantly from 160% in 2024. The 2025 target award was $3,070,000 for Mr. Kowlzan, our CEO, which was approximately 25% higher than the target award in 2024. The resulting maximum award level was $3.99 million for Mr. Kowlzan, which was slightly higher as compared to 2024. The 2025 target awards ranged from $1,000,000 to $2,090,000 for the other named executive officers, other than Mr. Mundy.

The committee establishes a payout matrix annually and reviews the payout matrix at every meeting in light of business conditions and forecasted performance. In establishing its payout matrix, the committee considers prior year award levels and the company’s forecasted performance against the prior year. The payout matrix was developed in connection with the review of the company’s annual

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“Summary Compensation Table.” As previously disclosed, beginning with the grants made in February 2026, we are issuing time vesting restricted stock units to our executive officers instead of time vesting restricted stock.

Our restricted stock awards cliff vest four years after the date of award and the ROIC Units and TSR Units vest based upon relative ROIC and TSR performance, respectively, against a peer group over the relevant performance period. ROIC is used as a performance measure to reward sustained long-term return-on-capital performance against peer companies with whom we are compared by investors. We selected TSR as a performance measure because it is the ultimate measurement of generation of value for our stockholders and is commonly used by peer companies as a portion of long-term compensation awarded to executive officers.

Based upon our review of competitive market survey information for peer companies, we believe that our equity award structure is rigorous and highly performance-based. Our restricted stock and ROIC Unit awards do not vest for four years, providing a longer-term performance horizon and retention incentive. Our TSR Units require performance at the top of the peer group to pay out at maximum, which is a more challenging slope than typically used by peer companies, which often pay out at maximum if 75^th percentile performance is achieved. We also cap payout on the ROIC Units at 120%, instead of a more commonly used 200% and, in practice, performance around or above the 90th percentile is required to pay above target.

The amount paid out under the ROIC Units and the TSR Units issued in February 2025 will be determined based upon our performance on the applicable performance measure compared to a peer group consisting of the following companies: Amcor Plc; AptarGroup, Inc; Avery Dennison Corporation; Ball Corporation; Cascades, Inc.; Celanese Corporation; Clearwater Paper Corporation; Crown Holdings, Inc.; Graphic Packaging Holding Company; Greif, Inc.; International Paper Company; Magnera Corporation; OI Glass, Inc.; Sealed Air Corporation; The Sherwin Williams Corporation; Silgan Holdings Inc.; Smurfit WestRock Plc; Sonoco Products Co.; and Sylvamo Company. Holders will also receive dividend equivalents upon vesting with a value equal to the amount of dividends accrued on the shares that actually vest. Dividend equivalents will be paid in cash unless the committee determines to pay them in shares.

The peer group is intended to be a comprehensive group of publicly traded paper, packaging and other industrial companies, which may compete with us for investor capital. The peer group changed from 2024 as follows: Ball Corporation was added to the peer group; Smurfit Westrock Plc replaced WestRock Company; Amcor Plc replaced Berry Global Inc.; and Magnera Corporation replaced PH Glatfelter Co. This group is not intended to be the same group used for comparative assessments as described above under “—Comparative Assessments.”

For the ROIC Units, annual ROIC for PCA and each peer company will be calculated for each of 2025, 2026, 2027 and 2028 and averaged. ROIC means pre-tax operating profit before publicly reported special items divided by the sum of net debt and equity. The ROIC Units will vest on, and pay out on or promptly after, February 26, 2029, the fourth anniversary of the date of the award, as long as the recipient is employed by, or otherwise provides services to, PCA. PCA must perform above the median of the group for the ROIC units to pay out at or above target. If PCA performs in the top three companies in the group, the units will pay out at 120% for first place, 113.33% for second place and 106.66% for third place. If PCA performs between median and fourth place, the units will pay out at 100%. If PCA performs in the third quartile of the group, a number of shares between 40% and 100% of the target number of shares will pay out. If PCA performs in the fourth quartile, no shares will vest.

For the TSR Units, TSR for PCA and each peer company will be calculated for the period beginning on March 1, 2025 and ending on February 29, 2028 with the beginning and ending Stock price determined on a 20-day, volume weighted average price basis preceding such dates. The TSR Units will vest and

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pay out after certification of performance by the committee promptly after the end of the performance period. PCA must perform above the median of the group for the TSR Units to pay out at or above target. If PCA is the highest performer in the peer group, 200% of the target number of shares will vest. If PCA performs between the median and the highest performer of the group, a number of shares between 100% and 200% of the target number of shares will vest. If PCA performs between the 33.33rd percentile and the median, a number of shares between 0% and 100% of the target number of shares will vest. If PCA performs below the 33.33rd percentile, then no shares will vest. The actual number of shares vesting within each range will be determined based upon linear interpolation of PCA’s performance within that range.

The terms of the units are consistent with prior years.

2025 Award Levels. Our historical approach has been to vary award levels based upon the change in our stock price; i.e., higher or lower stock price drives higher or lower absolute award levels for each officer, and we consider individual adjustments based upon competitive market information, individual performance, retention needs or changes in responsibilities. Given the significant year over year stock price improvement in 2024, we increased grant date values for each officer who previously served in their current position by approximately 8%. The grant date value for Mr. Carter was increased by 40.0% to recognize his importance to PCA. The grant date values for Mr. Shirley and Mr. Pflederer were increased by 22.1% and 36.4%, respectively, as a result of their promotions into new roles at PCA. Mr. Mundy did not receive an equity grant in 2025.

Payout of Prior Year Performance Unit Awards.

The performance period for the ROIC performance units awarded in 2021 ended on December 31, 2024 and vested, subject to continued service, on February 23, 2025. PCA achieved the second-highest average ROIC of the peer group companies (approximately the 95th percentile) for the four years in the performance period, resulting in 114% of the target shares under the units being earned plus dividend equivalents, which are reported in the “2025 Stock Vested” table. The committee determined to remove Domtar Corporation and Resolute Forest Products from the peer group, as they were acquired during the performance period.

The performance period for the ROIC performance units awarded in 2022 ended on December 31, 2025 and vested, subject to continued service, on February 23, 2026. The compensation subcommittee certified the performance attainment for these units on March 6, 2026. PCA achieved the fourth-highest average ROIC of the peer group companies (approximately the 83rd percentile) for the four years in the performance period, resulting in 100% of the target shares under the units being earned plus dividend equivalents. These units are reported in the “Outstanding Equity Awards Held by the Named Executive Officers at December 31, 2025” table at the attained level of performance. The subcommittee determined to remove Resolute Forest Products and Berry Global, Inc. from the peer group, as they were acquired during the performance period.

The three-year performance period for the TSR performance units awarded in 2022 began on March 1, 2022 and ended on February 28, 2025. PCA’s total shareholder return of 56.8% was at the 94th percentile of the peer group, resulting in the units paying out in shares equal to 187.4% of the number of target shares plus dividend equivalents, which are reported in the “2025 Stock Vested” table. The committee determined to remove Resolute Forest Products from the peer group, as it was acquired during the performance period.

Defined Benefit Retirement Plans

Effective May 1, 2004, we adopted a grandfathered pension plan for certain salaried employees (the “PCA Pension Plan”), including Mr. Kowlzan, Mr. Hassfurther and Mr. Shirley, each of whom previously

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had participated in the pension plan of our former parent company, Pactiv Corporation. During the period from April 12, 1999, when we became a stand-alone company, through April 30, 2004, PCA eligible salaried employees, including Mr. Kowlzan, Mr. Hassfurther and Mr. Shirley, were allowed to continue to participate in the Pactiv pension plans and Pactiv’s supplemental executive retirement plan, for an agreed upon fee paid by us to Pactiv. The benefit formula for the PCA Pension Plan is comparable to that of the Pactiv pension plan except that the PCA Pension Plan uses career average base pay in the benefit formula in lieu of final average base pay. The PCA Pension Plan recognizes service earned under both the new PCA Pension Plan and the prior Pactiv pension plan. Benefits earned under the PCA Pension Plan are reduced by retirement benefits earned under the Pactiv pension plan through April 30, 2004. All assets and liabilities associated with benefits earned through April 30, 2004 for our salaried employees and retirees were retained by the Pactiv pension plan.

In addition to the PCA Pension Plan, Mr. Kowlzan, Mr. Hassfurther and Mr. Shirley participate in a PCA supplemental executive retirement plan (the “SERP”). Benefits are determined using the same formula as the PCA Pension Plan but in addition to counting career average base pay, the SERP also recognizes incentive awards and any pay earned in excess of IRS qualified plan compensation limits. Benefits earned under the SERP are reduced by benefits paid from the PCA Pension Plan and any prior qualified pension and SERP benefits earned under the Pactiv pension plan.

Mr. Carter, Mr. Pflederer, and Mr. Mundy do not receive any pension benefits because they joined PCA after April 12,1999.

401(k) Plan

We offer a defined contribution 401(k) plan to our salaried employees, including the named executive officers. We have historically provided to PCA employees a company matching contribution of up to 5.2% of participant base salary (up to the maximum permitted by tax regulations). We offer a company

retirement contribution equal to a percentage of base salary that increases based upon years of service for employees not eligible to participate in our defined benefit pension plan, including Mr. Carter, Mr. Pflederer, and Mr. Mundy. For certain highly compensated salaried employees including the named executive officers, who make the maximum contribution to the plan permitted by tax regulations, we provide an extended match program under which the equivalent amount of the suspended company matching contribution is paid directly to the employee in the form of supplemental, taxable compensation.

Deferred Compensation Plan

We provide a voluntary non-qualified deferred compensation plan for eligible officers, including the named executive officers, pursuant to which annual cash incentive awards may be deferred. Certain officers not eligible to participate in the defined benefit pension plan, including Mr. Carter, Mr. Pflederer, and Mr. Mundy, receive an annual contribution to the deferred compensation plan in lieu of pension benefits.

Perquisites

Other than club memberships for officers and key management with sales responsibilities, including Mr. Hassfurther, we do not provide perquisites.

Health and Welfare Benefits

The named executive officers are offered health coverage, life and disability insurance under the same programs as all other salaried employees.

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Potential Payments Upon Termination or a Change of Control

Changes in employment status such as termination, death or disability, a change of control or retirement can trigger a benefit or accelerate a benefit for our salaried employees, including the named executive officers. These payments are described below. Named executive officers are not entitled to receive any incremental benefits or accelerated benefits that are different in scope, terms or operation than what are generally available to our salaried employees who are eligible to participate in our various compensation plans. However, historically, the committee has considered post-retirement or post-termination arrangements and acceleration or continued vesting of certain equity awards for named executive officers on a case-by-case basis in the event of a retirement or termination.

Beginning with the grants made in February 2026, a named executive officer will continue to vest in his outstanding equity awards upon his Retirement, provided that certain conditions are met, including the named executive officer’s providing at least twelve months’ notice of the retirement date and entering into a non-compete agreement with PCA. “Retirement” is defined as termination on or after the date the executive attains at least age 55 and the sum of the executive’s age and service equals at least 70 (and the termination does not occur for any other reason).

Payments Made Upon Termination

In general, when a named executive officer terminates employment with us, other than a termination for cause, the named executive officer is entitled to receive the amounts they have earned during the term of their employment and any benefits allowed as part of our compensation plans. These amounts that they will receive include the following:

Payments Made Upon Death or Disability

In the event of the death or disability of a named executive officer, in addition to the items identified above, all named executive officers will receive benefits under our disability plan or payments under our life insurance plan, as appropriate. Under our equity incentive plan, upon death or disability, generally all restrictions on restricted stock will lapse. In the event of death (a) the TSR Units will vest on the date of death and pay out a pro-rated portion through the date of death of the holder, based upon actual performance through the date of death; and (b) ROIC Units will vest on the date of death and pay out based upon actual performance through the calendar year preceding the date of death (or at the target level if the date of death is before the end of the first year of the performance period). In the event of disability, (a) the TSR Units will not vest early and will pay out a pro-rated portion through the date of disability based upon performance through the entire performance period; and (b) ROIC Units will not vest early and will pay out on the fourth anniversary of the award date based upon actual performance through the entire performance period. Beginning with the grants made in February 2026, vesting upon disability will be the same as vesting upon death. In the event of disability, (a) the TSR Units will vest on the date of disability and pay out a pro-rated portion through the date of disability, based upon actual performance through the date of disability; and (b) ROIC Units will vest on the date of disability and pay out based upon actual performance through the calendar year preceding the date of disability (or at the target level if the date of disability is before the end of the first year of the performance period).

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Payments Made Upon a Change of Control

There are no employment agreements for any named executive officers, nor are we contractually obligated to make any type of cash payment to any named executive officer in the event of a change of control. Equity awards include double trigger change of control provisions. If a substitute equity award meeting certain conditions is provided to the executive officer in connection with a change of control, that award will not vest as a result of the change of control unless the officer’s employment is terminated or the officer resigns for good reason within two years after a change of control. “Good reason” includes breach of certain obligations by the company, diminution of duties or authority of the officer, certain reductions of compensation of the officer or relocation of the principal office where the officer works.

Severance Benefits

We have no contractual obligation to pay severance to any of our named executive officers in the event of a termination. Any severance payments made to our named executive officers would be considered on a case-by-case basis, and any payment of severance that might be deemed appropriate would require approval of the committee. Historically, the committee has assessed post-retirement arrangements and acceleration of equity with retiring named executive officers on a case-by-case basis, taking into account transitional needs, expertise needed, customer relationships, the company’s succession plans and other factors, such as non-competition and non-solicitation covenants, that the committee determines to be important. Beginning with the grants made in February 2026, a named executive officer will continue to vest in his outstanding equity awards upon his Retirement, provided that certain conditions are met, including the named executive officer’s providing at least twelve months’ notice of the retirement date and entering into a non-compete agreement with PCA. “Retirement” is defined as termination on or after the date the executive attains at least age 55 and the sum of the executive’s age and service equals at least 70 (and the termination does not occur for any other reason).

Tax Implications

The committee has considered the provisions of Section 162(m) of the Internal Revenue Code of 1986, as amended, which generally limits the annual tax deductibility of compensation paid to each named executive officer to $1 million. Therefore, we expect that compensation paid to our covered executive officers in excess of $1 million is not deductible. Although the committee will continue to consider tax deductibility of compensation as one of many factors, the committee believes that it is in the best interests of our shareholders and our company to maintain the flexibility to structure our compensation programs to appropriately and competitively compensate our executive officers, even if these programs may result in non-deductible compensation expense.

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COMPENSATION COMMITTEE REPORT

The compensation committee of the board of directors has reviewed and discussed the Compensation Discussion and Analysis required by Item 402(b) of Regulation S-K with management and, based on such review and discussions, the committee recommended to the board of directors that the Compensation Discussion and Analysis be included in this Proxy Statement.

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EXECUTIVE OFFICER COMPENSATION

Summary Compensation Table

The grant date fair value of restricted stock awarded is the closing price of PCA common stock on the date of the award.

The grant date fair values of the ROIC Units awarded in 2025 (as described in “Compensation Discussion and Analysis—Long-Term Equity Awards—Equity Award Structure”), based upon the probable outcome of the performance conditions, which was 100%, are $3,828,011, $2,640,015, $949,291, $625,060, and $625,060 for Mr. Kowlzan, Mr. Hassfurther, Mr. Carter, Mr. Shirley, and Mr. Pflederer, respectively. The grant date fair values of the awards at a maximum payout of 120% are $4,593,613, $3,168,018, $1,139,149, $750,071, and $750,071 for Mr. Kowlzan, Mr. Hassfurther, Mr. Carter, Mr. Shirley, and Mr. Pflederer, respectively.

The grant date fair values of the TSR Units awarded in 2025 (as described in “Compensation Discussion and Analysis—Long-Term Equity Awards—Equity Award Structure”) as determined based upon a Monte Carlo simulation as prescribed by FASB ASC Topic 718 are $3,828,101, $2,640,061, $949,084, $624,942, and $624,942 for Mr. Kowlzan, Mr. Hassfurther, Mr. Carter, Mr. Shirley, and Mr. Pflederer, respectively.

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Mr. Mundy received a pro rata bonus of $460,026 for service from January 1, 2025 until May 1, 2025 when he stepped down as Chief Financial Officer.

2025 amounts include the following for Mr. Kowlzan, Mr. Hassfurther and Mr. Shirley: (a) the changes in value of the PCA Pension Plan of $47,906, $13,444 and $104,781, respectively; and (b) the changes in value of the Supplemental Executive Retirement Plan of $730,786, $763,139 and $281,944, respectively. Mr. Kowlzan’s and Mr. Hassfurther’s total include distributions paid pursuant to the Pactiv pension plan of $11,742 and $15,704, respectively.

2024 amounts include the following for Mr. Kowlzan and Mr. Shirley: (a) the changes in value of the PCA Pension Plan of ($18,331) and ($7,336), respectively, for the PCA Pension Plan and (b) $73,300 and $74,403, respectively, for the Supplemental Executive Retirement Plan. Mr. Kowlzan’s total includes distributions paid pursuant to the Pactiv pension plan of $11,742. The 2024 amount for Mr. Hassfurther was negative, as the value of the pension obligation for the Supplemental Executive Retirement Plan decreased more than the increase in the pension obligation for the PCA Pension Plan and the distribution paid pursuant to the Pactiv pension plan of $15,704. The amounts for Mr. Hassfurther were (a) $8,871 for the PCA Pension Plan and (b) ($67,613) for the Supplemental Executive Retirement Plan.

2023 amounts include the following for Mr. Kowlzan, Mr. Hassfurther and Mr. Shirley: (a) the changes in value of the PCA Pension Plan of $54,509, $18,439 and $93,794, respectively; and (b) the changes in value of the Supplemental Executive Retirement Plan of $822,715, $888,531 and $230,621, respectively. Mr. Kowlzan’s and Mr. Hassfurther’s total include distributions paid pursuant to the Pactiv pension plan of $11,742 and $15,704, respectively.

The methodology for calculating the aggregate incremental cost for payments for club membership dues for Mr. Hassfurther is the actual amounts paid without any tax gross-up.

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Grants of Plan-Based Awards for 2025

The following table describes the plan-based awards made in 2025, including the annual restricted stock awards, the performance unit awards and the annual cash incentive awards made to the named executive officers during the year.

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Restricted stock may not be sold or transferred until such stock vests. As a condition to vesting, the holder of restricted stock must remain employed by, serve as a director of, or otherwise provide services to, PCA on the vesting date (the “service condition”). Restricted stock vests in full on the fourth anniversary of the date of the award. Restricted stock may be voted by the holder, and holders receive dividends on the same basis as holders of outstanding common stock.

ROIC Units vest and pay out on the fourth anniversary of the date of the award. Holders must meet the service condition for vesting to occur. Awards are paid out entirely in shares. The amount paid out will range from 0% to 120% of the number of units awarded and is determined based upon our average annual ROIC for the performance period consisting of the years 2025, 2026, 2027 and 2028 compared to a peer group of companies in our industry and related industries. Dividend equivalents are paid out on the vesting date in cash or, if the committee so elects, a number of shares equal in value to the cumulative dividends actually paid on the number of shares that pay out. The grant date fair value is based upon the probable outcome of the performance conditions, which was 100%.

TSR Units vest and pay out after the end of the three-year performance period (March 1, 2025 to February 29, 2028). Holders must meet the service condition for vesting to occur. Awards are paid out entirely in shares. The amount paid out will range from 0% to 200% of the number of units awarded and is determined based upon our TSR for the performance period compared to a peer group of companies in our industry and related industries. Dividend equivalents are paid out on the vesting date in cash or, if the committee so elects, a number of shares equal in value to the cumulative dividends actually paid on the number of shares that pay out.

Outstanding Equity Awards Held by the Named Executive Officers at December 31, 2025

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As previously disclosed, PCA and Mr. Mundy entered into an agreement, dated as of March 1, 2026, in connection with Mr. Mundy’s retirement as of that date. As part of the agreement, Mr. Mundy’s 9,928 shares of restricted stock that would otherwise have vested in 2027 and 2028 vested as of Mr. Mundy’s retirement date.

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2025 Stock Vested Table

Restricted stock held by each officer vested on February 24, 2025 and performance units held by each of the officers vested on February 28, 2025. The amounts indicated in the table above include, in addition to vests of restricted stock on February 24, 2025: (a) shares earned by the named executive officers under ROIC units for the 2021-2024 performance period which paid out at 114% of target and dividend equivalents thereon paid out in shares; and (b) shares earned by the named executive officers under TSR units for the March 1, 2022 to February 28, 2025 performance period, which paid out at 187.4% of target on April 4, 2025. The closing price of PCA’s common stock on the New York Stock Exchange on February 24, 2025 was $209.74, on February 28, 2025 was $213.09 and on April 4, 2025, the payout date for the TSR unit shares was $183.42. The amounts in the “Value Realized on Vesting” column include the value of fractional shares paid out in cash for dividend equivalents.

Pension Benefits as of December 31, 2025

Mr. Kowlzan, Mr. Hassfurther and Mr. Shirley participate in our defined benefit pension plans. Mr. Carter, Mr. Pflederer, and Mr. Mundy do not participate in our defined benefit pension plans, as they joined PCA after April 12, 1999.

Plan 2 reflects the Pactiv supplemental executive retirement plan (April 12, 1999 — April 30, 2004) and its successor plan, the PCA Supplemental Executive Retirement Plan (“SERP”) (May 1, 2004 — December 31, 2025).

The Pactiv supplemental executive retirement plan was terminated and the present value of all benefits earned under that plan was paid out to all participants, including PCA named executive

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officers participating in that plan, during December 2010. Years of service under that plan are credited for purposes of determining benefits under the PCA plan. However, the present value of accumulated benefits reflected in the table for Plan 2 reflect only the present value of benefits earned under the PCA SERP from and after May 1, 2004, which is the date of inception of the PCA SERP.

The PCA Pension Plan provides for normal retirement at age 65 with full retirement benefits and early retirement at age 55 and 10 years of eligibility service with reduced retirement benefits. The reduction in retirement benefits by retirement age is as follows:

The formula used for computing monthly benefit payments at normal retirement age is as follows: 55% of average career base compensation earned since January 1, 2000 multiplied by years of credited service (up to a maximum of 35) divided by 35 less the monthly normal retirement benefit earned under the Pactiv pension plan.

The PCA SERP provides additional pension benefits to Mr. Kowlzan, Mr. Hassfurther and Mr. Shirley. The benefits under the SERP are determined using the same formula as the PCA Pension Plan but in addition to career base compensation, the SERP includes executive annual cash incentive plan awards as well as any career base compensation earned in excess of the annual compensation limits imposed under Section 401(a)(17) of the Internal Revenue Code. Benefits earned under the SERP are reduced by any benefits paid from the PCA Pension Plan and any prior benefits under Pactiv’s qualified pension plan and non-qualified SERP. The maximum years of credited service for Mr. Hassfurther for purposes of the SERP is 50 years.

The present values of accumulated benefits are based upon interest rate and mortality rate assumptions consistent with those used in our December 31, 2025 financial statements.

We calculated the present values shown in the Pension Benefits Table using: (i) a 5.38% discount rate for Plan 1 and a 5.29% discount rate for Plan 2, the same discount rates we use for ASC 715 calculations for financial reporting purposes; and (ii) the plan’s unreduced retirement age of 62. The present values shown in the table reflect postretirement mortality, based on the ASC 715 assumption (the Amounts-weighted Pri-2012 Retiree Mortality Table with White Collar Adjustment projected generationally using MP-2021) but do not include a factor for preretirement termination, mortality, or disability. Amounts for the pension plans are based on the present value of the annuity elections reflected in the ASC 715 calculation.

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Description of Deferred Compensation Plan

The deferred compensation plan provides eligible executives, including the named executive officers, the opportunity to defer all or a portion of their annual cash incentive awards under our annual incentive plan. Participants have the option of investing their deferred incentive awards among four distinct notional investment options in 1% increments, which include: (i) The JPMorgan Chase Prime Rate; (ii) The Fidelity Growth Company (large cap growth); (iii) Prudential Core Plus Bond (intermediate to long term bond); and (iv) Northern Trust Collective S&P 500 (S&P 500 index).

The JPMorgan Chase Prime Rate option is credited with prime rate as reported by the JPMorgan Chase Bank as of the first day of each calendar month. The notional returns for the Northern Trust Collective S&P 500, Fidelity Growth Company and Prudential Core Plus Bond Fund, which are investment options also offered in PCA’s defined contribution 401(k) plan, are based on the same daily net asset values computed under the 401(k) plan. In addition, the equivalent of any dividends or capital gains payments made by the Fidelity Growth Company option are also factored into the respective notional returns calculated for this investment option.

The rates of return for the deferred compensation investment options were as follows for 2025:

Participants may elect to change the allocation of their notional investments on any business day.

Under the terms of the deferred compensation plan, the value of the deferred amounts are typically paid upon the earlier of termination, retirement or death. However, at the time of the annual deferral election, participants may designate an alternate payment date provided that it is no earlier than one year from the date of deferral and no later than five years following the date of termination, retirement or death.

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Participants may apply for a withdrawal of all or a portion of their deferred compensation account to meet severe financial hardship, plus amounts necessary to pay taxes reasonably anticipated as a result of the distribution. The hardship application must be reviewed and approved by the PCA Benefits Administration Committee and cannot exceed the amount necessary to alleviate such financial need.

Incremental Payments on Termination or a Change of Control

Named executive officers are not entitled to receive any incremental benefits or accelerated benefits that are different in scope, terms or operation than what are generally available to our salaried employees who are eligible to participate in our various compensation plans. We have no contractual obligation to pay severance to any of our named executive officers in the event of a termination. If a named executive officer terminates or retires, post-termination arrangements or post-retirement arrangements would be considered on a case-by-case basis, and we will consider such arrangements if we require transitional services and/or non-competition or non-solicitation covenants. We would consider acceleration or continued vesting of unvested equity awards in connection with termination or retirement on a case-by-case basis. Based on the closing market price of our common stock of $206.23 on the New York Stock Exchange on December 31, 2025,

the last trading day of the year, the value of unvested restricted stock and performance units, assuming payout at the target level of performance for all performance units, held by each named executive officer was: Mr. Kowlzan, $43,656,210; Mr. Hassfurther, $30,146,495; Mr. Carter, $9,450,490; Mr. Shirley, $6,878,595; Mr. Pflederer, $6,339,098; and Mr. Mundy, $8,012,036.

Each of Mr. Kowlzan and Mr. Hassfurther are retirement eligible under the terms of the PCA Pension Plan, and, in the event of a termination, would be entitled to receive the benefits described above under “Pension Benefits as of December 31, 2025.”

If a named executive officer terminates employment as a result of death or disability, then all restrictions on restricted stock will lapse. In the event of death, (a) TSR units will vest on the date of death and pay out a pro-rated portion through the date of death of the holder, based upon actual performance through the date of death; and (b) ROIC units will vest on the date of death and pay out based upon actual performance through the calendar year preceding the date of death (or at the target level if the date of death is before the end of the first year of the performance period). In the event of disability, (a) the TSR units will not vest early and will pay out a pro-rated portion through the date of disability based upon performance through the entire performance period; and (B) ROIC units will not vest early and will pay out on the fourth anniversary of the award date based upon actual performance through the entire performance period.

Based on the closing market price of our common stock of $206.23 on the New York Stock Exchange on December 31, 2025, the last trading day of the year, the value of unvested restricted stock and performance units held by each named executive officer that would pay out as a result of death or disability on December 31, 2025 was: Mr. Kowlzan, $47,919,468; Mr. Hassfurther, $33,100,071; Mr. Carter, $10,183,810; Mr. Shirley, $7,479,678; Mr. Pflederer, $7,037,539; and Mr. Mundy, $10,054,870. The foregoing values of awards reflect the estimated degree of performance attained under the performance units through December 31, 2025 and the actual degree of performance for awards that vested earlier in 2026.

Our equity awards include double-trigger change-of-control provisions for restricted stock and performance units if a qualifying substitute equity award is made. Based on the closing market price of our common stock of $206.23 on the New York Stock Exchange on December 31, 2025, the last trading day of the year, the value of unvested restricted stock and performance units held

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by each named executive officer that would pay out either as a result of death or disability if the officer terminated or resigned for good reason within two years after, the change of control, or if a qualifying substitute equity award was not awarded to such officer was: Mr. Kowlzan, $54,329,638; Mr. Hassfurther, $37,522,192; Mr. Carter, $11,592,524; Mr. Shirley, $8,466,245; Mr. Pflederer, $8,016,828; and Mr. Mundy, $10,936,866. The foregoing values reflect the estimated degree of performance through December 31, 2025 and the actual degree of performance for awards that vested earlier in 2026.

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