UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

For the fiscal year ended December 31, 2023

Commission file number 1-15399

(Exact Name of Registrant as Specified in its Charter)

Registrant's telephone number, including area code: (847) 482-3000

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

At June 30, 2023, the last day of the Registrant's most recently completed second fiscal quarter, the aggregate market value of Registrant's common equity held by non-affiliates was approximately $11,671,075,503 based upon the closing sale price as reported on the New York Stock Exchange. This calculation of market value has been made for the purposes of this report only and should not be considered as an admission or conclusion by the Registrant that any person is in fact an affiliate of the Registrant.

On February 23, 2024, there were 89,624,119 shares of Common Stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Table of Contents

PART I

Item 1. BUSINESS

Packaging Corporation of America (“we,” “us,” “our,” “PCA,” or the “Company”) is the third largest producer of containerboard products and a leading producer of uncoated freesheet (UFS) paper in North America. We operate eight mills and 86 corrugated products plants and related facilities. We are headquartered in Lake Forest, Illinois and operate primarily in the United States.

We report in three reportable segments: Packaging, Paper and Corporate and Other. For segment financial information see Note 18, Segment Information, of the Notes to Consolidated Financial Statements in “Part II, Item 8, Financial Statements and Supplementary Data” of this Form 10-K.

Production and Shipments

The following table summarizes the Packaging segment's containerboard production and corrugated products shipments and the Paper segment's UFS production.

Below is a map of our locations:

Packaging

Packaging Products

Our containerboard mills produce linerboard and corrugating medium, which are papers primarily used in the production of corrugated products. Our corrugated products manufacturing plants produce a wide variety of corrugated packaging products, including conventional shipping containers used to protect and transport manufactured goods, multi-color boxes and displays with strong visual appeal that help to merchandise the packaged product in retail locations, and honeycomb protective packaging. In addition, we are a large producer of packaging for meat, fresh fruit and vegetables, processed food, beverages, and other industrial and consumer products. Our products are sustainable and are produced from renewable raw materials, predominately using energy derived from biogenic fuels in our production processes and are recyclable at end-of-life.

During the year ended December 31, 2023, our Packaging segment produced 4.5 million tons of containerboard at our mills. Our corrugated products manufacturing plants sold 60.5 billion square feet (BSF) of corrugated products. The Packaging segment’s net sales to third parties totaled $7.1 billion in 2023.

Facilities

We manufacture containerboard, which includes a variety of performance and specialty grades, at our containerboard mills. Total annual containerboard capacity was approximately 5.1 million tons as of December 31, 2023. We also produce corrugated and protective packaging products at 86 manufacturing locations. The following provides more details of our primary operating facilities:

Counce. Our Counce, Tennessee mill produces kraft linerboard on two machines. The mill can produce basis weights from 26 lb. to 90 lb.

DeRidder. Our DeRidder, Louisiana mill produces kraft linerboard on its No. 1 machine and kraft linerboard and corrugating medium on its No. 3 machine. The mill can produce linerboard in basis weights of 26 lb. to 69 lb. and medium in basis weights of 23 lb. to 33 lb.

Valdosta. Our Valdosta, Georgia mill produces kraft linerboard on one machine. The mill can produce basis weights from 35 lb. to 96 lb.

Tomahawk. Our Tomahawk, Wisconsin mill produces corrugating medium on two machines. The mill can produce basis weights from 23 lb. to 47 lb.

Filer City. Our Filer City, Michigan mill produces corrugating medium on three machines. The mill can produce basis weights from 20 lb. to 47 lb.

Wallula. Our Wallula, Washington mill produces corrugating medium on its No. 2 machine and kraft linerboard and corrugating medium on its No. 3 machine. The mill can produce medium in basis weights from 23 lb. to 33 lb. and linerboard in basis weights from 31 lb. to 52 lb.

Jackson. Our Jackson, Alabama mill produces kraft linerboard on its No. 3 machine and kraft linerboard and corrugating medium on its No. 1 machine. The mill can produce linerboard in basis weights from 22 lb. to 34 lb. and medium in basis weights from 23 lb. to 33 lb.

Before October 2020, Jackson had historically operated as a UFS paper mill, with its results of operations reported in our Paper segment. Beginning in October 2020, operating results for the Jackson mill are included in both the Packaging and Paper segments. During the fourth quarter of 2020, in order to meet strong packaging demand and maintain appropriate inventory levels, we temporarily began producing linerboard on the No. 3 machine and, in the first quarter of 2021, we announced the discontinuation of producing uncoated freesheet paper grades on the machine and the permanent conversion of the machine to produce linerboard. Beginning in the third quarter of 2021, we began producing corrugating medium on the No. 1 machine. The production of corrugating medium on the No. 1 machine has continued to date, and consequently, the operating results for the Jackson mill are included in the Packaging segment for the periods presented.

As of December 31, 2023, we operated 86 corrugated manufacturing and protective packaging operations, a technical and development center, seven regional design centers, a rotogravure printing operation, and a complement of packaging supplies and distribution centers. Of the 86 manufacturing facilities, 58 are combining operations, commonly called corrugated plants, which manufacture corrugated sheets and finished corrugated packaging products, 27 are sheet plants, which procure combined sheets and manufacture finished corrugated packaging products, and one is a corrugated sheet-only manufacturer.

Corrugated products plants tend to be located in close proximity to customers to minimize freight costs. Each of our plants serves a market radius of approximately 150 miles. Our sheet plants are generally located in close proximity to our larger corrugated plants, which enables us to offer additional services and converting capabilities such as small volume and quick turnaround items.

Major Raw Materials Used

Fiber supply. Fiber is the largest raw material cost to manufacture containerboard. We consume both virgin wood fiber and recycled fiber in our containerboard mills, and all of our fiber comes from renewable resources. Our mill system has the capability to shift a portion of its fiber consumption between softwood, hardwood, and recycled sources. All of our mills can utilize virgin wood fiber and all of our mills, other than the Valdosta mill, can utilize some recycled fiber in their containerboard production. Our corrugated manufacturing operations generate recycled fiber as a by-product from the manufacturing process, which is consumed by our mills. In 2023, our usage of recycled fiber, net of internal generation, represents 18% of our containerboard production.

We procure wood fiber through leases of cutting rights, long-term supply agreements, and market purchases and believe we have adequate sources of fiber supply for the foreseeable future.

As part of our renewable virgin fiber sourcing efforts, we participate in the Sustainable Forestry Initiative® (SFI), the Programme for the Endorsement of Forest Certification (PEFC), as well as the Forest Stewardship Council® (FSC®), and we are certified under their sourcing and chain of custody standards. These standards are aimed at ensuring the long-term health and conservation of forestry resources. We are committed to sourcing wood fiber through environmentally, socially, and economically sustainable practices and promoting resource and conservation stewardship ethics.

Energy supply. Energy at our packaging mills is obtained through self-generated or purchased fuels and electricity. Fuel sources include by-products of the containerboard manufacturing and pulping process (including black liquor and wood waste), natural gas, purchased wood waste, and other purchased fuels. Each of our mills self-generates process steam requirements from by-products (black liquor and wood waste), as well as from the various purchased fuels. The process steam is used throughout the production process and also to generate electricity.

In 2023, our packaging mills consumed about 82 million MMBTUs of fuel to produce both steam and electricity. Of the 82 million MMBTUs consumed, about 63% was from mill-generated biogenic fuels that are by-products of our containerboard manufacturing and pulping process and 37% was from purchased fuels. Of the purchased fuels, 71% was from natural gas, 27% was from purchased wood waste and 2% was from other purchased fuels.

Chemical supply. We consume various chemicals in the production of containerboard, including caustic soda, starch, sulfuric acid, soda ash, and lime. Most of our chemicals are purchased under contracts, which are bid or negotiated periodically.

Sales, Marketing, and Distribution

Our corrugated products are sold through our direct sales and marketing organization, independent brokers, and distribution partners. We have sales representatives and a sales manager at most of our corrugated manufacturing operations and also have corporate account managers who serve customer accounts with a national presence. Additionally, our design centers maintain an on-site dedicated graphics sales force. In addition to direct sales and marketing personnel, we utilize new product development engineers and product graphics and design specialists. These individuals are located at both the corrugated plants and the design centers. General marketing support is provided at our corporate headquarters.

Our containerboard sales group is responsible for linerboard and corrugating medium order processing and supply to our corrugated plants, to outside domestic customers, and to export customers. These personnel also coordinate and execute all containerboard trade agreements with other containerboard manufacturers.

Containerboard produced in our mills is primarily shipped by rail or truck. Our corrugated products are delivered by truck due to proximity of our corrugated manufacturing operations to customers and load size. Our corrugated manufacturing operations typically serve customers within a 150-mile radius.

Customers

We sell containerboard and corrugated products to approximately 14,000 customers in approximately 30,000 locations. About 70 % of our corrugated products sales are to regional and local accounts, which are broadly diversified across industries and geographic locations. The remaining 30 % of our corrugated products customer base consists primarily of national accounts that have multiple locations and are served by a number of PCA plants. No single customer exceeds 10% of segment sales.

The primary end-use markets in the United States for corrugated products are shown below as reported in the 2022 Fibre Box Association annual report:

Competition

As of December 31, 2023, we were the third largest producer of containerboard products in North America, according to industry sources and our own estimates. According to industry sources, corrugated products are produced by about 400 U.S. companies operating approximately 1,100 plants. The primary basis for competition for most of our packaging products includes quality, service, price, product design, and innovation. Most corrugated products are manufactured to the customer’s specifications. Corrugated producers generally sell within a 150-mile radius of their plants and compete with other corrugated producers in their local region. Competition in our corrugated products operations tends to be regional, although we also face competition from competitors with significant national account presence.

On a national level, our primary competitors are International Paper, WestRock Company, and Georgia-Pacific LLC. However, with our strategic focus on regional and local accounts, we also compete with many smaller, independent producers.

Paper

We are a leading producer of UFS in North America, according to industry sources and our own estimates. We manufacture and sell papers, including both commodity and specialty papers, which may have custom or specialized features such as colors, coatings, high brightness, and recycled content. Our papers consist of communication papers, including cut-size office papers, and printing and converting papers. Our products are sustainable and are produced from renewable raw materials, predominately using energy derived from biogenic fuels in our production processes and are recyclable at end-of-life.

Facilities

We currently have one paper mill located in International Falls, Minnesota that produces both commodity and specialty papers on two paper machines. The mill has the capacity to produce approximately 500,000 tons annually.

Major Raw Materials Used

Fiber supply. Fiber is the largest raw material cost in this segment. We consume wood fiber, recycled fiber, and purchased pulp. We purchase wood fiber through contracts and open-market purchase, and we purchase recycled fiber and pulp from third parties pursuant to contractual agreements.

As part of our renewable virgin fiber sourcing efforts, we participate in the Sustainable Forestry Initiative® (SFI), the Programme for the Endorsement of Forest Certification (PEFC), as well as the Forest Stewardship Council® (FSC®), and we are certified under their sourcing and chain of custody standards. These standards are aimed at ensuring the long-term health and conservation of forestry resources. We are committed to sourcing wood fiber through environmentally, socially, and economically sustainable practices and promoting resource and conservation stewardship ethics.

Energy supply. We obtain energy through self-generated or purchased fuels and electricity. Fuel sources include by-products of the manufacturing and pulping process (including black liquor and wood waste), natural gas, electricity, and purchased wood waste. The paper mill self-generates process steam requirements from by-products (black liquor and wood waste), as well as from the various purchased fuels. The process steam is used throughout the production process and to generate electricity.

In 2023, our paper mill consumed about 11 million MMBTUs of fuel to produce both steam and electricity. Of the 11 million MMBTUs consumed, about 76% was from mill-generated biogenic fuels that are by-products of the manufacturing and pulping process and 24% was from purchased natural gas.

Chemical supply. We consume various chemicals in the production of white papers, including starch, precipitated calcium carbonate, caustic soda, and sodium chlorate. Most of our chemicals are purchased under contracts, which are bid or negotiated periodically.

Sales, Marketing, and Distribution

Our papers are sold primarily through our sales and marketing organization. We ship to customers both directly from our mills and through distribution centers and a network of outside warehouses by rail or truck. This allows us to respond quickly to customer requirements.

Customers

We have about 40 customers in approximately 150 locations. These customers include office products distributors and retailers, paper merchants, and envelope and other converters. We have established long-term relationships with many of our customers. ODP Corporation ("ODP"), formerly Office Depot, Inc., along with its subsidiaries and affiliates, is our largest customer in the Paper segment. Effective January 1, 2024, we have amended the agreement with ODP in which we will continue to supply commodity and non-commodity office papers through December 31, 2025. If the agreement is not renewed by the parties, ODP's obligation to purchase paper would phase down over a two-year period beginning January 1, 2026. In 2023, our sales revenue to ODP represented 61% of our Paper segment sales revenue and 5% of our consolidated sales revenue.

Competition

The markets in which our Paper segment competes are large and highly competitive. Commodity grades of UFS paper are globally traded, with numerous worldwide manufacturers, and as a result, these products compete primarily on the basis of price. Our paper manufacturing facility is located in the United States, and although we compete primarily in the domestic market, we do face competition from foreign producers. In 2016, as a result of a case brought by us and other domestic producers before United States international trade authorities, antidumping and countervailing duties at various levels were imposed on producers of uncoated freesheet papers produced in Australia, Brazil, China, Indonesia, and Portugal. These duties remain in effect after sunset review of duty orders by the U.S. International Trade Commission in January 2022. Other factors influencing competition from overseas producers include domestic and foreign demand and foreign currency exchange rates.

Our largest competitors include Domtar Corporation, a division of Paper Excellence, and Sylvamo Corporation. We also face competition from foreign producers and smaller North American producers. Although price is the primary basis for competition in most of our paper grades, quality and service are also important competitive determinants. Our papers compete with electronic data transmission, e-readers, electronic document storage alternatives, and paper grades we do not produce. Increasing shifts to these alternatives have had, and are likely to continue to have, an adverse effect on traditional print media and paper usage and lower demand for communication papers.

Corporate and Other

Our Corporate and Other segment includes corporate support staff services and related assets and liabilities. This segment also includes transportation assets such as rail cars and trucks, which we use to transport some of our products to and from our manufacturing sites, and assets related to a 50% owned variable interest entity, Louisiana Timber Procurement Company, L.L.C. (LTP).

Human Capital

PCA’s success depends on a highly engaged, results-oriented workforce operating in an entrepreneurial culture. Our primary objective is to place the right people in the right roles and empower them to succeed.

Safety is a core value at PCA and we believe that all accidents are preventable and an injury-free environment is achievable. We have implemented a robust occupational health and safety management system to assure accountability throughout the organization for safe work practices. Key components to our system include commitment from management, extensive training of employees, hazard identification and communication and regular safety audits.

PCA has, at times, experienced labor shortages and/or higher than historical employee turnover in certain of our facilities. However, PCA has not experienced significant disruptions in its operations and has managed to maintain adequate availability of its workforce and supply of raw materials and services to continue to serve its customers.

We have extensive recruiting, training and development programs designed to attract and retain a highly talented workforce aligned with our objectives to relentlessly serve our customers and achieve operational excellence throughout our organization. As demand for qualified personnel is increasing, we are expanding our efforts in these critical areas along with efforts to continue to develop, promote and maintain a diverse workforce with a culture and an environment of respect and inclusion. We believe it is essential to hire and promote diverse candidates and employees in order to bring the best ideas to serve our customers. We have established a Diversity, Equity, and Inclusion Council consisting of leaders throughout our organization to hone our strategy and to create a roadmap for inclusive leadership. We publicly disclose in our annual responsibility report our employee demographics in the form of our annual EEO-1 report. Our responsibility report is available on our website and is not intended to be incorporated by reference herein.

PCA regularly conducts employee engagement surveys to measure our employees’ overall satisfaction as well as gain a better understanding of how to improve our employees’ work experience. Our last survey, conducted in 2022, had a high level of participation, assuring us that the results were an accurate reflection of the feelings and opinions of our employees. Our employees reaffirmed our strong safety culture, our dedication to being socially and environmentally responsible and responded favorably to questions on diversity, equity and inclusion. Our overall engagement index, which is in line with other U.S. manufacturing companies, is only one benchmark we consider in measuring employee satisfaction. Our commitment to continuous improvement means we use employee feedback to foster progress. Based on our 2022 survey responses, our plants formed action teams to identify and address areas for improvement specific to their location. We remain committed to seeking feedback from our employees as we work together to continue to make PCA a great place to work. Our next employee engagement survey will be conducted as scheduled in the first half of 2024.

As of December 31, 2023, we had approximately 14,900 employees, including 4,300 salaried and 10,600 hourly employees. Approximately 63% of our hourly employees worked pursuant to collective bargaining agreements. The majority of our unionized employees are represented by the United Steel Workers (USW), the Printing Packaging Production Workers Union (PPPWU), the Association of Western Pulp and Paper Workers (AWPPW), the International Association of Machinists (IAM), and the International Brotherhood of Teamsters (IBT). We are currently in negotiations to renew or extend union contracts that have recently expired or are expiring in the near future. During 2023, we experienced no work stoppages, and we believe we have satisfactory labor relations with our employees.

Regulatory and Environmental Matters

A discussion of the financial impact of our compliance with environmental laws is presented under the caption “Regulatory and Environmental Matters” in “Part II, Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations” of this Form 10-K.

Executive Officers of the Registrant

Brief statements setting forth the age at February 29, 2024, the principal occupation, employment during the past five years, the year in which such person first became an officer of PCA, and other information concerning each of our executive officers appears below.

Mark W. Kowlzan, 68, Chairman and Chief Executive Officer - Mr. Kowlzan has served as PCA's Chairman since January 2016 and as Chief Executive Officer and a director since July 2010. From 1998 through June 2010, Mr. Kowlzan led the company’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 mill-related operating positions with PCA and Tenneco Packaging, including as manager of the Counce linerboard mill. Prior to joining Tenneco Packaging, Mr. Kowlzan spent 15 years at International Paper, a global paper and packaging company, where he held a series of operational and managerial positions within its mill organization. Mr. Kowlzan is a member of the board of American Forest and Paper Association.

Charles J. Carter, 64, Executive Vice President - Mill Operations - Mr. Carter has led our mill operations since January 2011. From March 2010 to January 2011, Mr. Carter served as PCA’s Director of Papermaking Technology. Prior to joining PCA in 2010, Mr. Carter spent 28 years with various pulp and paper companies in managerial and technical positions of increasing responsibility, most recently as Vice President and General Manager of the Calhoun, Tennessee mill of Abitibi Bowater from 2007 to 2010 and as manager of SP Newsprint’s Dublin, Georgia mill from 1999 to 2007.

Thomas A. Hassfurther, 68, Executive Vice President - Corrugated Products - Mr. Hassfurther has served as Executive Vice President - Corrugated Products of PCA since September 2009. From February 2005 to September 2009, Mr. Hassfurther served as Senior Vice President - Sales and Marketing, Corrugated Products. Prior to this he held various senior-level management and sales positions at PCA and Tenneco Packaging. Mr. Hassfurther joined the company in 1977.

Robert P. Mundy, 62, Executive Vice President and Chief Financial Officer - Mr. Mundy has served as our Chief Financial Officer since 2015. He previously served as Senior Vice President and Chief Financial Officer of Verso Corporation, a leading North American supplier of coated papers to catalog and magazine publishers, from 2006 to June 2015. Verso Corporation filed for Chapter 11 bankruptcy in January 2016. Prior to that, he worked at International Paper from 1983 to 2006, where he was Director of Finance of the Coated and Supercalendered Papers division from 2002 to 2006, Director of Finance Projects from 2001 to 2002, Controller of Masonite Corporation from 1999 to 2001, and Controller of the Petroleum and Minerals business from 1996 to 1999. He served in various business positions at International Paper from 1983 to 1996.

Pamela A. Barnes, 59, Senior Vice President – Finance and Controller - Ms. Barnes has served as Senior Vice President – Finance and Controller since May 2019. Ms. Barnes previously served as a Vice President in PCA’s finance organization from 2012 to 2019. After joining the company in 1992, she has held various positions of increasing responsibility, including serving as PCA’s Treasurer since 1999. Before joining PCA, Ms. Barnes worked for Deloitte & Touche.

Jeff S. Kaser, 58, Senior Vice President – Corrugated Products - Mr. Kaser has served as Senior Vice President — Corrugated Products since May 2020. Prior to this, he served as a Vice President and Area General Manager in PCA's corrugated products business since 2012, leading PCA’s Midwest Area, Mid-Atlantic Area and Pennsylvania Region. Mr. Kaser joined PCA in 1987 and has also held plant positions in sales, sales management and general management.

Darla J. Olivier, 54, Senior Vice President – Tax, ESG and Government Affairs - Ms. Olivier has led our tax department since 1994 and served as Vice President—Tax from October 2010 to January 2022. In January 2022, she was promoted to Senior Vice President—Tax, ESG and Government Affairs, and leads our sustainability reporting and government affairs functions. Before joining PCA, Ms. Olivier worked for Coopers & Lybrand LLP, Alberto-Culver Company and SPX Corporation.

Kent A. Pflederer, 53, Senior Vice President, General Counsel and Secretary - Mr. Pflederer has served as Senior Vice President, General Counsel and Corporate Secretary since January 2013 and has led our legal department since June 2007. Prior to joining PCA, Mr. Pflederer served as Senior Counsel, Corporate and Securities, at Hospira, Inc. from 2004 to 2007 and served in the corporate and securities practice at Mayer Brown, LLP from 1996 to 2004.

Bruce A. Ridley, 68, Senior Vice President – Environmental Health and Safety and Operational Services - Mr. Ridley has served as Senior Vice President – Environmental Health and Safety and Operational Services since May 2019. Mr. Ridley previously served as Vice President of Operations from 2012 to 2019 and at PCA’s Tomahawk, Wisconsin containerboard mill as the Operations Manager and Mill Manager from 1999 to 2011. Before joining PCA, he held several positions of increasing responsibility at multiple locations during his 19 years with International Paper and two years with Champion International.

Robert A. Schneider, 58, Senior Vice President and Chief Information Officer - Mr. Schneider has served as our Chief Information Officer since 2000 and was promoted to Senior Vice President in 2019. Mr. Schneider joined the company in 1989 and has held various management and other positions of increasing responsibility in information systems for PCA.

D. Ray Shirley, 52, Senior Vice President – Corporate Engineering and Process Technology - Mr. Shirley has served as PCA’s Senior Vice President – Corporate Engineering and Process Technology since May 2019. Mr. Shirley previously served as PCA’s Vice President – Containerboard Mills Engineering and Process Technology from 2012 to 2019 and as Mill Manager at PCA’s Counce, Tennessee containerboard mill from 2010 to 2012. He has served in various management roles within the company, including the Operations Manager at the Filer City, Michigan containerboard mill. Before joining PCA in 1996, Mr. Shirley worked for Georgia-Pacific Corporation.

Available Information

PCA’s internet website address is www.packagingcorp.com. Our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 are available free of charge through our website as soon as reasonably practicable after they are electronically filed with, or furnished to, the Securities and Exchange Commission. In addition, our Code of Ethics may be accessed in the Investor Relations section of PCA’s website. PCA’s website and the information contained or incorporated therein are not intended to be incorporated into this report.

Item 1A. RISK FACTORS

Some of the statements in this report and, in particular, statements found in Management’s Discussion and Analysis of Financial Condition and Results of Operations, that are not historical in nature are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements about our expectations regarding our future liquidity; earnings; expenditures; environmental, social, and governance (ESG) goals; and financial condition. These statements are often identified by the words “will,” “should,” “anticipate,” “believe,” “expect,” “intend,” “estimate,” "goals," “hope,” or similar expressions. These statements reflect management’s current views with respect to future events and are subject to risks and uncertainties. There are important factors that could cause actual results to differ materially from those in forward-looking statements, many of which are beyond our control. These factors, risks and uncertainties include, but are not limited to, the factors described below.

Our actual results, performance, or achievement could differ materially from those expressed in, or implied by, these forward-looking statements, and accordingly, we can give no assurances that any of the events anticipated by the forward-looking statements will transpire or occur, or if any of them do so, what impact they will have on our results of operations or financial condition. In view of these uncertainties, investors are cautioned not to place undue reliance on these forward-looking statements. We expressly disclaim any obligation to publicly revise or otherwise update any forward-looking statements that have been made to reflect the occurrence of events after the date hereof.

In addition to the risks and uncertainties we discuss elsewhere in this Form 10-K (particularly in “Part II, Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations”) or in our other filings with the Securities and Exchange Commission (SEC), the following are important factors that could cause our actual results to differ materially from those we project in any forward-looking statement.

Risks Related to our Operations, Business and Industry

General Economic Conditions – A deterioration in general economic conditions may harm our business, results of operations, cash flows, and financial position. General global and domestic economic conditions directly affect the levels of demand and production of consumer goods, levels of employment, the availability and cost of credit, and ultimately, the demand for our products and the profitability of our business. The U.S. economy has experienced persistent inflation, and we have experienced, and continue to experience, cost inflation across our business. Inflation has resulted in, and may continue to result in, higher production and transportation costs, which we may not be able to recover through higher prices charged to our customers or otherwise. Interest rates have increased, which may result in lower consumer demand and higher borrowing costs, and may cause general economic conditions to deteriorate. During the first half of 2023, we experienced a deterioration in operating conditions involving our Packaging business as a result of general economic conditions and lower demand with customers adjusting their ordering patterns to reduce their inventories, which negatively affected our profitability. However, demand rebounded in the second half of 2023. The economic outlook for 2024 remains uncertain. If global economic conditions deteriorate, economies could experience a recession, which may result in higher unemployment rates, lower disposable income, lower Company earnings and investment, and lower consumer spending. These factors may result in lower demand for our products and negatively affect our business, results of operations and cash flows.

In addition, changes in trade policy, including renegotiating or potentially terminating existing bilateral or multilateral agreements as well as the imposition of tariffs, could impact global markets and demand for our and our customers’ products and the costs associated with certain of our capital investments. Further changes in tax laws or tax rates may have a material impact on our future cash taxes, effective tax rate or deferred tax assets and liabilities. These conditions are beyond our control and may have a material impact on our business, results of operations, liquidity, and financial position.

Industry Cyclicality – Changes in the prices of our products could materially affect our financial condition, results of operations, and liquidity. Macroeconomic conditions and fluctuations in industry capacity can create changes in prices, sales volumes, and margins for most of our products, particularly commodity grades of packaging and paper products. Prices for all of our products are driven by many factors, including demand for our products, industry capacity and decisions made by other producers with respect to capacity and production, and other competitive conditions in our industry. These factors are affected by general global and domestic economic conditions, customer purchasing decisions, and operating conditions involving our business and industry. We have little influence over the timing and extent of price changes of our products, which may be unpredictable and volatile. In addition, as many of our customer contracts include price adjustment provisions based upon published surveyed prices for containerboard or certain grades of UFS papers reported by trade publications, our selling prices are influenced by price levels determined and published by trade publications. Published containerboard prices have decreased beginning in the fourth quarter of 2022 and throughout 2023, which resulted in lower prices for our containerboard and corrugated products and lower profitability. Changes in how these surveyed price levels are determined or maintained may affect our sales prices. If supply exceeds demand, operating conditions involving our business and industry deteriorate, or other factors result in lower prices for our products, our earnings, and operating cash flows would be harmed.

Competition – The intensity of competition in the industries in which we operate could result in downward pressure on pricing and volume, which could lower earnings and operating cash flows. Our industries are highly competitive, with no single containerboard, corrugated packaging, or UFS paper producer having a dominant position. Certain containerboard grades and UFS paper products cannot generally be differentiated by producer, which tends to intensify price competition. The corrugated packaging industry is also sensitive to changes in economic conditions, as well as other factors including innovation, design, quality, and service. To the extent that one or more competitors are more successful than we are with respect to any key competitive factor, our business could be adversely affected. Our packaging products also compete, to some extent, with various other packaging materials, including products made of paper, plastics, wood, and various types of metal. If we are unable to successfully compete, we may lose market share or may be required to charge lower sales prices for our products, both of which would reduce our earnings and operating cash flows.

UFS paper products compete with electronic data transmission and document storage alternatives. Increasing shifts to electronic alternatives have had and will continue to have an adverse effect on usage of these products. As a result of such competition, the industry is experiencing decreasing demand for existing UFS paper products. As the use of these alternatives grows, demand for UFS paper products is likely to further decline. Declines in demand for our paper products may adversely affect our earnings and operating cash flows.

Some of our competitors are larger than we are and may have greater financial and other resources, greater manufacturing economies of scale, greater energy self-sufficiency, or lower operating costs, compared to our company. Some of the factors that may adversely affect our ability to compete in the markets in which we participate include the entry of new competitors into the markets we serve, increased competition from overseas producers, our competitors' pricing strategies, changes in customer preferences, and the cost-efficiency of our facilities.

Cost of Fiber – An increase in the cost of fiber could increase our manufacturing costs and lower our earnings. The market price of wood fiber varies based upon availability, source, and the costs of fuels used in the harvesting and transportation of wood fiber. The cost and availability of wood fiber can also be impacted by weather, general logging conditions, geography, and regulatory activity.

The availability and cost of recycled fiber depends heavily on recycling rates and the domestic and global supply and demand for recycled products. We purchase recycled fiber for use at six of our containerboard mills. In 2023, we purchased approximately 809,000 tons of recycled fiber at our containerboard mills, net of the recycled fiber generated by our corrugated box plants. The amount of recycled fiber purchased each year varies based upon production and the prices of both recycled fiber and wood fiber.

Periods of higher recycled fiber costs and unusual price volatility have occurred in the past, including during 2023. Prices for recycled fiber may continue to fluctuate significantly in the future, and a significant increase could result in higher costs and lower earnings. A $10 per ton price increase in recycled fiber for our containerboard mills would result in approximately $8 million of additional expense based on 2023 consumption.

Cost of Purchased Fuels and Chemicals – An increase in the cost of purchased fuels and chemicals could lead to higher manufacturing costs, resulting in reduced earnings. We have, at times, experienced significant cost inflation and volatility for key inputs such as fuels and chemicals. We have the ability to use various types of purchased fuels in our manufacturing operations, including natural gas, bark, and other purchased fuels. Fuel prices, in particular prices for oil and natural gas, have fluctuated in the past. New and more stringent environmental regulations may discourage, reduce the availability of, or make more expensive, the use of certain fuels, such as natural gas, which represents the majority of our purchased fuels. In addition, costs for key chemicals used in our manufacturing operations also fluctuate. These fluctuations impact our manufacturing costs and result in earnings volatility. If fuel and chemical prices rise, our production costs and transportation costs will increase and cause higher manufacturing costs and reduced earnings if we are unable to recover such increases through higher prices of our products or other means. A $0.10 per million MMBTU increase in natural gas prices would result in approximately $3 million of additional expense, based on 2023 usage.

Customer Concentration – We rely on certain large customers. Our packaging and paper segments each have large customers, the loss of which could adversely affect the segment’s sales and profitability. In particular, because our businesses operate in highly competitive industry segments, we regularly bid for new business or for renewal of existing business. The loss of business from our larger customers, or the renewal of business on less favorable terms, may adversely impact our financial results.

ODP Corporation ("ODP"), formerly Office Depot, Inc., along with its subsidiaries and affiliates, is our largest customer in the Paper segment. Effective January 1, 2024, we have amended the agreement with ODP in which we will continue to supply commodity and non-commodity office papers through December 31, 2025. If the agreement is not renewed by the parties, ODP's obligation to purchase paper would phase down over a two-year period beginning January 1, 2026.

In 2023, sales to ODP represented 61% of our Paper segment sales and 5% of our consolidated sales. If these sales are reduced, including if we are unable to renew the agreement at historical volume levels, we would need to find new customers. We may not be able to fully replace any lost sales, and any new sales may be at lower prices or higher costs. Any significant deterioration in the financial condition of ODP affecting its ability to pay or any other change that makes ODP less willing to purchase our products will harm our Paper business and results of operations.

Transportation Costs – Reduced truck and rail availability could lead to higher costs or poorer service, resulting in lower earnings, and harm our ability to distribute our products. We ship our products primarily by truck and rail. We have at times experienced lower availability of third-party trucking services, including truck and driver shortages, and service issues, interruptions, and delays in rail services, which are exacerbated in periods of high demand for such services. While we have generally been able to manage through these issues and have not experienced material disruptions in our ability to serve our customers, these issues have resulted, at times, in significantly higher costs for transportation services. If these factors persist, we could experience even higher transportation costs in the future and difficulties shipping our products in a timely manner. We may not be able to recover higher transportation costs through higher prices or otherwise, which would result in lower earnings.

Material Disruption of Operations – A material disruption at one of our manufacturing facilities could prevent us from meeting customer demand, reduce our sales, and/or negatively affect our results of operations and financial condition. Our business depends on continuous operation of our facilities, particularly at our mills. Any of our manufacturing facilities, or any of our machines within such facilities, could cease operations unexpectedly for a significant period of time due to a number of events, including:

These events could harm our ability to produce our products and serve our customers and may lead to higher costs and reduced earnings.

Extreme Weather Events – Our facilities are susceptible to extreme weather events, which could disrupt our business. Extreme weather events like hurricanes, tornadoes, floods and winter storms have caused disruptions to our business both directly and indirectly in recent history. Climate change may increase the frequency and intensity of these extreme weather events. Certain weather events may cause damage to our facilities and require us to temporarily halt operations. These types of events may also disrupt our customers' and suppliers’ operations. Disruptions to the supply chain may cause the cost of goods to temporarily increase. Damage to our facilities may cause insurance premiums to increase and also require us to incur additional costs to mitigate future risks.

ESG – We may not achieve or make satisfactory progress on our goals and targets to reduce emissions and satisfy other ESG metrics. Investors, customers, governmental authorities, and other interested parties have an increased focus on ESG matters, including with respect to climate change, greenhouse gas emissions, and sustainable business practices. This increased awareness with respect to ESG matters, including climate change, is expected to result in more prescriptive reporting requirements with respect to ESG metrics and expectations that companies establish goals and commitments regarding ESG metrics and take actions to achieve those goals and commitments.

We have voluntarily established targets and goals with respect to greenhouse gas emissions, which are discussed elsewhere in this report under the caption "Regulatory and Environmental Matters" in "Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this Form 10-K. Our ability to achieve those targets and goals will depend on certain factors beyond our control, including regulatory actions, emergence of and advances in technology, and availability of required products and services. Our efforts to achieve ESG targets and goals may result in higher costs and capital expenditures with a low return on investment and may distract management efforts from other operational matters. We may not achieve or make satisfactory progress on our ESG goals and targets. If we are unable to meet these goals and targets, our reputation with investors, customers and other stakeholders and businesses may be harmed.

Reliance on Personnel – We may fail to attract and retain qualified personnel, including key management personnel. Our ability to operate and grow our business depends on our ability to attract and retain employees with the skills necessary to operate and maintain our facilities, produce our products and serve our customers. The increasing demand for qualified personnel may make it more difficult for us to attract and retain qualified employees. Changing demographics and labor work force trends may make it difficult for us to replace retiring employees at our manufacturing and other facilities. U.S. labor market conditions remain tight, and we have, at times, experienced labor shortages and/or higher than historical employee turnover in certain of our facilities. If we fail to attract and retain qualified personnel, or if we experience labor shortages, we may experience higher costs and other difficulties, and our business may be adversely impacted.

In addition, we rely on key executive and management personnel to manage our business efficiently and effectively. As our business has grown in size and geographic scope, we have relied on these individuals to manage increasingly complex operations. The loss of any of our key personnel could adversely affect our business.

Cybersecurity – Risks related to security breaches of company, customer, employee, and vendor information, as well as the technology that manages our operations and other business processes, could adversely affect our business. We rely on various information technology and process control systems to capture, process, store, and report data, operate our manufacturing and converting facilities, and interact with customers, vendors, and employees. Despite careful security and controls design, implementation, updating, and internal and independent third-party assessments, our information technology and process control systems, and those of our third-party providers, could become subject to cyber-attacks or security breaches. Network, system, and data breaches could result in misappropriation of sensitive data or operational disruptions including interruption to systems availability and denial of access to and misuse of applications required by our customers and vendors to conduct business with us. Misuse of internal applications; theft of intellectual property, trade secrets, or other corporate assets; and inappropriate disclosure of confidential information could stem from such incidents. Delayed shipments, slowed production, or other issues resulting from these disruptions could result in lost sales, business delays, and negative publicity and could have a material adverse effect on our operations, financial condition, or operating cash flows. For further discussion pertaining to cybersecurity strategy and related roles and responsibilities, see “Part I, Item 1C. Cybersecurity” of this Form 10-K.

Environmental Matters – PCA may incur significant environmental liabilities with respect to both past and future operations. We are subject to, and must comply with, a variety of federal, state and local environmental laws, particularly those relating to air and water quality, waste disposal and the cleanup of contaminated soil and groundwater. Failure to comply with these regulations could result in fines, which may be significant, or other adverse regulatory action. Because environmental regulations are constantly evolving, we have incurred, and will continue to incur, costs to maintain compliance with those laws. See Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations - Environmental Matters” for estimates of expenditures we expect to make for environmental compliance in the next few years. New and more stringent environmental regulations may be adopted and may require us to incur additional operating expenses and/or significant additional capital expenditures to modify or replace certain of our boilers and other equipment. For example, the EPA recently enacted more stringent particulate matter emissions standards, which may make it more difficult to obtain or maintain air permits and more difficult and expensive to comply with the limitations set forth in our permits. We are assessing the impact of these new standards on our business and operations. In addition, environmental regulations may increase the cost of our raw materials and purchased energy. Although we have established reserves to provide for known environmental liabilities, these reserves may change over time due to the enactment of new environmental laws or regulations or changes in existing laws or regulations, which might require additional significant environmental expenditures.

Labor Relations – If we experience strikes or other work stoppages, our business will be harmed. Our workforce is highly unionized and operates under various collective bargaining agreements. We must negotiate to renew or extend any union contracts that have recently expired or are expiring in the near future. While we believe that we have satisfactory labor relations, we may not be able to successfully negotiate new agreements without work stoppages or labor difficulties in the future or renegotiate them on favorable terms. If we are unable to successfully renegotiate the terms of any of these agreements, or if we experience any extended interruption of operations at any of our facilities as a result of strikes or other work stoppages, our business, results of operations and financial condition may be harmed.

Financial Risks

Inflation and Other General Cost Increases – We may not be able to offset higher costs. We are subject to both contractual, inflationary, and other general cost increases, including with regard to our labor costs and purchases of raw materials and transportation services. General economic conditions have resulted in higher inflation, which has led to higher costs across our business. If we are unable to offset these cost increases by price increases, growth, and/or cost reductions in our operations, these inflationary and other general cost increases could have a material adverse effect on our operating cash flows, profitability, and liquidity.

In 2023, our total company costs including cost of sales (COS) and selling, general, and administrative expenses (SG&A) was $6.7 billion, and excluding non-cash costs (depreciation, depletion and amortization, pension and postretirement expense, and share-based compensation expense) was $6.1 billion. A 1% increase in COS and SG&A costs would increase costs by $67 million and cash costs by $61 million.

Debt obligations – Our debt service obligations may reduce our operating flexibility. At December 31, 2023, we had $2.9 billion of debt outstanding and a $323 million undrawn revolving credit facility, after deducting letters of credit. All debt is comprised of fixed-rate senior notes. We and our subsidiaries are not restricted from incurring, and may incur, additional indebtedness in the future.

Our current borrowings, plus any future borrowings, may affect our ability to operate our business, including, without limitation:

Further, if we cannot service our indebtedness, we may have to take actions to secure additional cash by selling assets, seeking additional equity or reducing investments, which may not be achievable on acceptable terms or at all.

Pension Plans – Our pension plans may require additional funding. We record a liability associated with our pensions equal to the excess of the benefit obligations over the fair value of the assets funding the plans. The actual required amounts and timing of future cash contributions will be sensitive to changes in the applicable discount rates and returns on plan assets and could also be impacted by future changes in the laws and regulations applicable to plan funding. Fluctuations in the market performance of our plan assets will affect our pension plan costs in future periods. Changes in assumptions regarding expected long-term rate of return on plan assets, our discount rate, expected compensation levels, or mortality will also increase or decrease pension costs.

Market Price of our Common Stock - The market price of our common stock may be volatile, which could cause the value of the stock to decline. Securities markets worldwide periodically experience significant price declines and volume fluctuations due to macroeconomic factors and other factors beyond our control. This market volatility, as well as general economic, market, or political conditions, could reduce the market price of our common stock with little regard to our operating performance. In addition, our operating results could be below the expectations of public market analysts and investors, and in response, the market price of our common stock could decrease significantly.

Item 1B. UNRESOLVED STAFF COMMENTS

None.

Item 1C. CYBERSECURITY

Risk Management and Strategy

The Company maintains a cyber risk management program to prevent, detect and respond to information security threats. This program is supervised by a dedicated Chief Information Security Officer (CISO) whose team is responsible for leading enterprise-wide cybersecurity strategy, policy, standards, architecture and processes. The CISO manages the program in collaboration with the Company’s businesses and functions. To mitigate the risk of cybersecurity threats and data breaches we also have established policies and procedures, including a Cybersecurity & Data Breach Incident Response Policy and identified an Incident Response Team (IRT) with defined roles, responsibilities and means of communication. As part of our broader risk management and control framework we have implemented cybersecurity controls over the information technology and process control systems of the Company and of its third-party service providers. The Company engages third-party organizations to assess the controls around sensitive data, including but not limited to financial, employee, customer and vendor data as well as data affecting our process controls and data used to operate our manufacturing and converting facilities. We work with an independent assessor to conduct interim assessments and track ongoing efforts to continuously improve the Company’s cyber risk management program. The most recent assessment was completed at the end of 2022. In addition, the Company utilizes an independent audit firm to perform specific attack and penetration reviews on an annual basis. While we have experienced threats to our data and systems, as of December 31, 2023, we are not aware of any cybersecurity incidents that have materially impacted, or are reasonably likely to materially impact, our operations or financial condition.

Board Roles and Responsibilities

The Audit Committee of the Board of Directors oversees the Company’s cyber risk management program. The Chief Information Officer (CIO) and the Vice President of Network Services present frequent updates to the Audit Committee and, as necessary, to the full Board of Directors. These regular reports include detailed updates on the Company’s performance preparing for, preventing, detecting, responding to and recovering from cyber incidents. In addition, we have established processes to notify the Audit Committee of active incidents, as deemed necessary. The Company’s program is periodically evaluated by third-party experts, and the results of those reviews are reported to the Board of Directors.

Management Responsibilities

The Incident Response Team that we have established as part of our cyber risk management program coordinates the Company’s response to incidents and communicates with internal and external stakeholders. The team includes members of our Senior Leadership and draws upon additional staff, consultants, advisors and service providers as needed.

We are continuously focused on ensuring our Company is protected from potential cyber threats. Our Information Technology (IT) team is comprised of employees with a diverse mix of skills, backgrounds, perspectives, and relevant expertise, that undergo extensive training as part of their employment with the Company. We believe these measures together with our cyber risk management program as well as our policies, processes and procedures set a high benchmark for our employees to address and respond to cybersecurity threats.

Our IT team regularly monitors best practices and as needed, implements changes to the Company’s cyber risk management program to ensure a robust program is maintained. Aspects of this program include plans and procedures for identifying, communicating and containing security incidents, regular risk assessments and testing of the Company’s internal infrastructure to identify vulnerabilities, procedures for recovering from disruptions to our operations, maintaining global security policies, and comprehensive end user training and cybersecurity drills for personnel.

See “Part I, Item 1A. Risk Factors” of this Form 10-K for a discussion of cybersecurity risks.

Item 2. PROPERTIES

We own and lease properties in our business. Primarily all of our leases are non-cancelable and are accounted for as operating leases. These leases are not subject to early termination except for standard nonperformance clauses.

Information regarding our principal operating facilities, the segments that use those facilities, and a map of geographical locations is presented in “Part I, Item 1. Business” of this Form 10-K. We assess the condition and capacity of our manufacturing, distribution, and other facilities needed to meet our operating requirements. Our properties have been generally well maintained and are in good operating condition. In general, our facilities have sufficient capacity and are adequate for our production and distribution requirements.

As of December 31, 2023, we own buildings and land for our eight mills. Additionally, we have 86 corrugated manufacturing operations, of which the buildings and land for 53 are owned, including 45 combining operations, or corrugated plants, one corrugated sheet-only manufacturer, and seven sheet plants. We lease the buildings for 13 corrugated plants and 20 sheet plants. We own warehouses and miscellaneous other properties, including sales offices and woodlands management offices. We lease space for regional design centers and numerous other distribution centers, warehouses, and facilities. The equipment in these leased facilities is, in virtually all cases, owned by us, except for forklifts and other rolling stock, which are generally leased.

We own our corporate headquarters building, which is located in Lake Forest, Illinois.

Item 3. LEGAL PROCEEDINGS

Information concerning legal proceedings can be found in Note 19, Commitments, Guarantees, Indemnifications, and Legal Proceedings, of the Notes to Consolidated Financial Statements in “Part II, Item 8. Financial Statements and Supplementary Data” of this Form 10-K.

Item 4. MINE SAFETY DISCLOSURE

Not applicable.

PART II

Item 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS, AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Information

PCA’s common stock is listed on the New York Stock Exchange (NYSE) under the symbol “PKG.”

Stockholders

On February 23, 2024, there were 140 holders of record of our common stock.

Purchases of Equity Securities

Share Repurchase Program

On January 26, 2022, PCA announced that its Board of Directors authorized the repurchase of $1 billion of the Company’s outstanding common stock from time to time in open market or privately negotiated transactions in accordance with applicable securities laws. At the time of the announcement, there was no remaining authority under previously announced programs. Repurchases may be made from time to time in open market or privately negotiated transactions in accordance with applicable securities regulations. The timing and amount of repurchases will be determined by the Company in its discretion based on factors such as PCA’s stock price and market and business conditions.

During the third quarter of 2023, we paid $41.5 million, including fees, to repurchase 0.3 million shares of common stock. All shares repurchased have been retired. At December 31, 2023, $436.0 million of the authorized amount remained available for repurchase of the Company’s common stock. During the third and fourth quarters of 2022, we paid $522.6 million, including fees, to repurchase 4.0 million shares of common stock. During the fourth quarter of 2021, we paid $193.0 million, including fees, to repurchase 1.4 million shares of common stock, which was the entire remaining amount of repurchase authority we had under previously announced share repurchase programs.

Pursuant to its equity incentive plan, the Company withholds shares from vesting employee equity awards to cover employee tax liabilities. We withheld 120,534 shares in 2023 to cover $15.7 million in employee tax liabilities, 110,827 shares in 2022 to cover $15.4 million in employee tax liabilities, and 95,437 shares in 2021 to cover $12.9 million in employee tax liabilities.

During the three months ended December 31, 2023, there were no repurchases of common stock made under repurchase plans authorized by PCA’s Board of Directors and no shares withheld from employees to cover income and payroll taxes on equity awards that vested.

Performance Graph

The graph below compares PCA’s cumulative 5-year total shareholder return on common stock with the cumulative total returns of the S&P 500 index; the S&P Midcap 400 index; and a customized peer group of two companies that includes: International Paper and WestRock Company. The graph tracks the performance of a $100 investment (including the reinvestment of all dividends) in our common stock, in each index, and in each peer group’s common stock from December 31, 2018 through December 31, 2023. The stock price performance included in this graph is not necessarily indicative of future stock price performance.

The information in the graph and table above is not deemed “filed” with the Securities and Exchange Commission and is not to be incorporated by reference in any of PCA’s filings under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether made before or after the date of this Annual Report on Form 10-K, except to the extent that PCA specifically incorporates such information by reference.

Item 6. [RESERVED]

Item 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of historical results of operations and financial condition should be read in conjunction with the audited financial statements and the notes thereto which appear elsewhere in this Form 10-K. This discussion includes forward-looking statements regarding our expectations with respect to our future performance, liquidity, ESG goals, and capital resources. Such statements, along with any other non-historical statements in the discussion, are forward-looking. See our discussion regarding forward-looking statements included under “Part I, Item 1A. Risk Factors” of this Form 10-K. For our discussion and analysis of our results of operations, financial condition and cash flows for the year ended December 31, 2021, the earliest of the years presented in the accompanying audited financial statements included in Item 8 herein, please refer to our Annual Report on Form 10-K for the year ended December 31, 2022, filed with the Securities and Exchange Commission on February 23, 2023. Such information is presented in Item 7 of such report under the subcaptions “Results of Operations —Year Ended December 31, 2022, Compared with Year Ended December 31, 2021” and “Liquidity and Capital Resources” and is incorporated by reference herein.

Overview

PCA is the third largest producer of containerboard products and a leading producer of uncoated freesheet paper in North America. We operate eight mills and 86 corrugated products manufacturing plants. Our containerboard mills produce linerboard and corrugating medium, which are papers primarily used in the production of corrugated products. Our corrugated products manufacturing plants produce a wide variety of corrugated packaging products, including conventional shipping containers used to protect and transport manufactured goods, multi-color boxes and displays with strong visual appeal that help to merchandise the packaged product in retail locations, and honeycomb protective packaging. In addition, we are a large producer of packaging for meat, fresh fruit and vegetables, processed food, beverages, and other industrial and consumer products. We also manufacture and sell UFS papers, including both commodity and specialty papers, which may have custom or specialized features such as colors, coatings, high brightness, and recycled content. We are headquartered in Lake Forest, Illinois and operate primarily in the United States.

Executive Summary

Net sales were $7.8 billion for the year ended December 31, 2023 and $8.5 billion for 2022. We reported $765 million of net income, or $8.48 per diluted share, in 2023, compared to $1,030 million, or $11.03 per diluted share, in 2022. Net income included $19 million of expense for special items in 2023, compared to $10 million of expense for special items in 2022. Special items in both periods are described later in this section. Excluding special items, we recorded $784 million of net income, or $8.70 per diluted share, in 2023, compared to $1,040 million, or $11.14 per diluted share, in 2022. The decrease was driven primarily by lower prices and mix in our Packaging segment and lower volumes in our Packaging and Paper segments, partially offset by higher prices and mix in our Paper segment, lower operating and converting costs, and lower annual outage expense. For additional detail on special items included in reported GAAP results, as well as segment income (loss) excluding special items, earnings before non-operating pension expense, interest, income taxes, and depreciation, amortization, and depletion (EBITDA), and EBITDA excluding special items, see “Item 7. Reconciliations of Non-GAAP Financial Measures to Reported Amounts.” PCA ended the year with $1,206 million of cash and marketable debt securities and, including borrowing availability under its revolving credit facility, $1,529 million in liquidity.

Packaging segment income from operations was $1,074 million in 2023, compared to $1,424 million for 2022. Packaging segment EBITDA excluding special items was $1,556 million in 2023, compared to $1,849 million in 2022. The decrease was driven primarily by lower containerboard and corrugated products prices and mix, lower volumes, and higher freight and logistic expenses, partially offset by lower operating and converting costs and lower annual outage expense. Packaging volumes were down during the first half of the year as challenging economic conditions continued in 2023, with customers reducing orders to manage their inventories. Customer ordering patterns began to normalize, and volumes began to improve mid-year, and by the fourth quarter, corrugated shipments were up 6.9% in total over fourth quarter 2022. Overall, our corrugated products shipments were down (4.6%) for the year.

In order to match our supply with the demand for our products, we reduced production of containerboard at our packaging mills during the first three quarters of 2023, including idling the Wallula, WA mill in June. We began ramping up production in the fourth quarter to meet increasing demand and restarted the No. 3 machine at the Wallula mill. For more information on our containerboard production and corrugated products shipments, refer to the table presented under the caption “Production and Shipments” in “Part I, Item 1. Business” of this Form 10-K.

After increasing during the first three quarters of 2022, containerboard prices published by industry publications began to decline during the fourth quarter of 2022 and continued to decline throughout 2023. We notified customers of a $70 per ton price increase for linerboard and a $100 per ton price increase for medium effective January 1, 2024.

Over the past several years, we made extensive capital investments throughout the packaging segment to improve productivity and efficiencies at our containerboard mills and corrugated products facilities and believe that our success in execution of these capital investments has helped us to mitigate cost inflation and better serve our customers.

Paper segment income from operations was $119 million in 2023, compared to $103 million in 2022. Paper segment EBITDA excluding special items was $151 million in 2023, compared to $132 million in 2022. The increase was due primarily to higher paper prices and mix and lower freight and logistic expenses, partially offset by lower volumes and higher operating costs. Lower volumes were driven by declining uncoated freesheet demand and sales of remaining paper at the Jackson, AL mill in 2022.

We have undertaken activities to convert the Jackson mill from production of paper products, which the mill historically produced, to production of containerboard. For more information, see the Packaging caption in “Part I, Item 1. Business” and Note 1, Nature of Operations and Basis of Presentation, of the Notes to Consolidated Financial Statements in “Part II, Item 8. Financial Statements and Supplementary Data” of this Form 10-K.

Special Items and Earnings per Diluted Share, Excluding Special Items

Earnings per diluted share, excluding special items, in 2023 and 2022 were as follows:

Management excludes special items, as it believes these items are not necessarily reflective of the ongoing results of operations of our business. We present these measures because they provide a means to evaluate the performance of our segments and our company on an ongoing basis using the same measures that are used by our management, because these measures assist in providing a meaningful comparison between periods presented and because these measures are frequently used by investors and other interested parties in the evaluation of companies and the performance of their segments. A reconciliation of diluted earnings per share to diluted earnings per share excluding special items is included above and the reconciliations of other non-GAAP measures used in this Management's Discussion and Analysis of Financial Condition and Results of Operations, to the most comparable measure reported in accordance with GAAP, are included later in Item 7 under “Reconciliations of Non-GAAP Financial Measures to Reported Amounts.” Any analysis of non-GAAP financial measures should be done in conjunction with results presented in accordance with GAAP. The non-GAAP measures are not intended to be substitutes for GAAP financial measures and should not be used as such.

Industry and Business Conditions

Trade publications reported North American industry-wide corrugated products shipments were down (5.0%) during 2023, compared to 2022. Reported industry containerboard production decreased (3.1%) compared to 2022, and reported industry containerboard inventories at the end of 2023 were approximately 2.6 million tons, down (3.1%) compared to 2022. Reported containerboard export shipments increased 2.6% compared to 2022. For linerboard, index prices decreased $10 per ton in January 2023, followed by additional decreases of $20 per ton in February 2023, $20 per ton in May 2023, and $20 per ton in November 2023, a total decrease of $70 per ton during 2023. For corrugating medium, index prices decreased $30 per ton in January 2023, followed by additional decreases of $20 per ton in February 2023, $40 per ton in May 2023, and $20 per ton in November 2023, a total decrease of $110 per ton during 2023.

The market for communication papers competes heavily with electronic data transmission and document storage alternatives. Increasing shifts to these alternatives have reduced usage of traditional print media and communication papers. Trade publications reported North American uncoated freesheet paper shipments decreased (9.7%) in 2023, compared to 2022. Although average prices reported by a trade publication for cut size office papers were higher by $57 per ton, or 4%, in 2023 compared to 2022, index prices declined throughout the year. For cut size office papers, index prices decreased $20 per ton in April 2023, followed by additional decreases of $10 per ton in June 2023 and $20 per ton in October 2023, a total decrease of $50 per ton during 2023. For offset printing papers, index prices decreased $30 per ton in April 2023, followed by additional decreases of $10 per ton in June 2023, $20 per ton in August 2023, $10 per ton in September 2023, and $15 per ton in November 2023, a total decrease of $85 per ton during 2023.

Outlook

For the first quarter of 2024, compared to the fourth quarter of 2023, in our Packaging segment, we expect higher total corrugated products shipments from continued strong demand along with two additional shipping days in the first quarter. Containerboard volume is expected to be lower due to a prolonged outage at the Jackson mill for the conversion of the No. 3 machine and a scheduled maintenance outage at our Counce, TN mill. We have restarted the No. 2 machine at the Wallula mill, which will partially offset the effect of these outages. Prices and mix should be slightly higher as we implement our January price increases, which will be partially offset by a decrease in the published prices that occurred late in 2023. We expect export containerboard prices to be flat. In our Paper segment, we expect an improved mix to move prices slightly higher with flat sales volume. Recycled fiber and energy prices will be higher, and seasonally colder weather will negatively impact usages and yields for energy, wood and chemicals along with higher operating costs associated with the restart of full operations at the Wallula mill compared to fourth quarter operations. Labor and benefits costs will have seasonal timing-related increases that occur at the beginning of a new year related to annual wage and benefit increases, the restart of payroll taxes, and share-based compensation expenses. Scheduled outage expenses will be higher and will include the significant first quarter impact of the conversion outage at our Jackson mill. Considering these items, we expect first quarter earnings to be lower than the fourth quarter of 2023.

Results of Operations

Year Ended December 31, 2023, Compared with Year Ended December 31, 2022

The historical results of operations of PCA for the years ended December 31, 2023 and 2022 are set forth below (dollars in millions):

Net Sales

Net sales decreased $676 million, or (8.0%), to $7,802 million in 2023, compared to $8,478 million in 2022.

Packaging. Net sales decreased $645 million, or (8.3%), to $7,136 million, compared to $7,781 million in 2022, due to lower prices and mix ($397 million) and lower volumes ($248 million). In 2023, our domestic containerboard prices decreased (10.5%) and export prices decreased (29.7%) compared to 2022. Our containerboard outside shipments decreased (1.1%), and total corrugated products shipments were down (4.6%) in total and (4.3%) per workday, compared to 2022.

Paper. Net sales decreased $27 million, or (4.3%), to $595 million, compared to $622 million in 2022. The decrease was due to lower volume ($65 million), partially offset by higher prices and mix ($38 million).

Gross Profit

Gross profit decreased $392 million in 2023, compared to 2022. The decrease was driven primarily by lower prices and mix in our Packaging segment, and lower volumes in our Packaging and Paper segments, partially offset by higher prices and mix in our Paper segment, lower operating and converting costs, and lower annual outage expense. In 2023, gross profit included $15 million of special items expense related to Jackson mill conversion-related activities and corrugated facility closure and other costs, compared to $7 million of special items expense related to Jackson mill conversion-related activities, corrugated facility closure and other costs, and income related to acquisition and integration-related activities in 2022.

Selling, General, and Administrative Expenses

Selling, general, and administrative expenses (SG&A) decreased $28 million in 2023 compared to 2022. The decrease was primarily due to lower employee-related expenses, outside services, and bad debt expense.

Other Expense, Net