UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-15399 (Exact Name of Registrant as Specified in its Charter) (State or Other Jurisdiction of Incorporation or Organization) 1 North Field Cour ...

Key Takeaways PKG reported Q2 adjusted EPS of $2.48, exceeding guidance and rising 13% y/y.Q2 sales rose 4.6% y/y to $2.17B, driven by improved pricing and mix across Packaging and Paper.The gross margin expanded to 22.2% from 21.1% as gross profit jumped 10.3% y/y.Packaging Corporation of America (PKG) reported adjusted earnings per share (EPS) of $2.48 in the second quarter of 2025, beating the Zacks Consensus Estimate of $2.44. The reported figure was higher than the company’s guidance of $2.41 in the qu ...

Financial Data and Key Metrics Changes - The company reported second quarter net income of $242 million or $2.67 per share, an increase from $199 million or $2.20 per share in 2024 [4] - Excluding special items, net income was $224 million or $2.48 per share compared to $199 million or $2.20 per share in 2024, reflecting a $0.28 per share increase driven by higher prices and lower fiber costs [4][5] - Second quarter net sales were $2.2 billion in 2025, up from $2.1 billion in 2024 [4] - Total company EBITDA for the second quarter, excluding special items, was $451 million in 2025 compared to $400 million in 2024 [4] Business Line Data and Key Metrics Changes - In the Packaging segment, EBITDA excluding special items was $453 million with sales of $2 billion, resulting in a margin of 22.6%, compared to last year's EBITDA of $400 million and sales of $1.9 billion with a margin of 21% [5][6] - The Paper segment reported EBITDA excluding special items of $30 million with sales of $146 million, yielding a margin of 20.8%, compared to $31 million and $150 million in sales in 2024 [12] Market Data and Key Metrics Changes - Domestic containerboard and corrugated products prices and mix were $0.95 per share above 2024, with export containerboard prices up $0.03 per share versus last year's second quarter [8] - Export containerboard sales were lower, with a production of 85,000 fewer tons than in 2024 [6] Company Strategy and Development Direction - The company announced an agreement to acquire the Greif containerboard business, which is expected to provide a strong growth platform for both containerboard and corrugated products [7][10] - The acquisition is anticipated to be completed by the end of the third quarter, subject to regulatory approval [7] Management's Comments on Operating Environment and Future Outlook - Management noted that while corrugated customers remained cautious, there was steady improvement in bookings and shipments as July progressed [15] - The company expects higher corrugated shipments and containerboard production in the third quarter, despite lower export containerboard sales due to the global trade environment [15][16] - Management expressed optimism about potential upside if global trade issues and tariffs are resolved [70] Other Important Information - Cash provided by operations was $300 million in the quarter, with free cash flow of $130 million [13] - The company has a quarter-end cash balance, including marketable securities, of $956 million, with liquidity of approximately $1.3 billion [14] Q&A Session Summary Question: Can you talk about bookings and billings to start the new quarter? - Bookings are trending at 2% over Q2 2024, with a good start compared to last year's strong performance [23] Question: What was behind the better performance in operations? - The company operated at approximately 99% uptime performance, executing efficiently despite some downtime due to demand [25] Question: Can you clarify the impact of export sales on revenue and EBITDA? - The increase in revenue and EBITDA per ton is primarily due to price increases rather than mix changes [29] Question: What is the outlook for e-commerce growth? - Customers in the e-commerce sector are still growing mid-single digits, with more growth expected in the second half of the year [79] Question: How will the Greif acquisition impact recycled mix and customer sets? - The recycled mix is expected to increase from around 20% to approximately 30% post-acquisition, providing better opportunities in the market [86] Question: What is the expected marginal cost of the new debt from the Greif acquisition? - The company is modeling about a 5.5% interest rate on the new debt, resulting in around $100 million incremental interest [100]

Financial Data and Key Metrics Changes - The company reported a second quarter net income of $242 million or $2.67 per share, an increase from $199 million or $2.20 per share in 2024 [3] - Excluding special items, net income was $224 million or $2.48 per share compared to $199 million or $2.20 per share in 2024, reflecting a year-over-year increase [3][4] - Second quarter net sales were $2.2 billion in 2025, up from $2.1 billion in 2024 [3] - Total company EBITDA for the second quarter, excluding special items, was $451 million in 2025 compared to $400 million in 2024 [3][4] Business Line Data and Key Metrics Changes - In the Packaging segment, EBITDA excluding special items was $453 million with sales of $2 billion, resulting in a margin of 22.6%, compared to last year's EBITDA of $400 million and sales of $1.9 billion or 21% [4] - The Paper segment reported EBITDA excluding special items of $30 million with sales of $146 million, yielding a margin of 20.8%, compared to $31 million and $150 million in sales in 2024 [11] Market Data and Key Metrics Changes - Domestic containerboard and corrugated products prices and mix were $0.95 per share above 2024, with export containerboard prices up $0.03 per share versus last year's second quarter [7] - Shipments per day in corrugated products plants were up 1.7% compared to last year's strong second quarter [7] Company Strategy and Development Direction - The company announced an agreement to acquire the Greif containerboard business, which is expected to provide a strong growth platform for both containerboard and corrugated products [6] - The acquisition is targeted for completion by the end of the third quarter, subject to regulatory approval [6] Management's Comments on Operating Environment and Future Outlook - Management noted that while corrugated customers remained cautious, there has been steady improvement in bookings and shipments as July progressed [14] - The company expects higher corrugated shipments and containerboard production in the third quarter, despite lower export containerboard sales due to the global trade environment [14][15] - Management anticipates third quarter earnings of $2.80 per share excluding special items, with operating costs near second quarter levels and slightly lower fiber costs [15] Other Important Information - Cash provided by operations was $300 million in the quarter, with free cash flow of $130 million [13] - The company has a quarter-end cash balance, including marketable securities, of $956 million, with liquidity of approximately $1.3 billion [13] Q&A Session Summary Question: Can you discuss bookings and billings to start the new quarter? - Bookings are trending at 2% over Q2 2024, with a good start compared to the previous year [21] Question: What was behind the better performance in operations? - The company operated at approximately 99% uptime performance, executing efficiently despite some smaller machines being down [22][23] Question: Can you clarify the revenue per ton and EBITDA per ton increases? - The increases were primarily due to price increases rather than mix, with export sales contributing to revenue and EBITDA [25][26] Question: What is the outlook for box shipments and containerboard production? - Box shipments are expected to be flat year-over-year, with containerboard production down by 25,000 to 30,000 tons compared to last year [92] Question: How will the Greif acquisition impact capital expenditures? - The acquisition will avoid significant capital expenditures, as the company can utilize existing facilities instead of building new ones [39] Question: What is the expected recycled mix before and after the Greif acquisition? - The recycled mix is expected to increase from around 20% to approximately 30% post-acquisition [82] Question: How has the company been impacted by recent industry closures? - The company has not seen significant changes in business due to closures, as the market for containerboard remains limited [86]

Group 1 - Packaging Corp. reported $2.17 billion in revenue for the quarter ended June 2025, a year-over-year increase of 4.6% [1] - The EPS for the same period was $2.48, compared to $2.20 a year ago, indicating a positive growth [1] - The reported revenue exceeded the Zacks Consensus Estimate of $2.16 billion, resulting in a surprise of +0.49% [1] Group 2 - Key metrics indicate that Packaging Corp. shares have returned +8.4% over the past month, outperforming the Zacks S&P 500 composite's +5.9% change [3] - The stock currently holds a Zacks Rank 3 (Hold), suggesting it may perform in line with the broader market in the near term [3] Group 3 - Segment Sales for Packaging reached $2.01 billion, surpassing the estimated $1.98 billion, reflecting a +5.1% change year-over-year [4] - Segment Sales for Corporate and Other amounted to $19.6 million, exceeding the estimated $18.72 million, with a +16% change compared to the previous year [4] - Segment Sales for Paper were $145.8 million, below the estimated $151.03 million, showing a -2.9% change year-over-year [4] Group 4 - Segment operating income for Packaging was $321.7 million, higher than the estimated $301.92 million [4] - Segment operating loss for Corporate and Other was $-36.8 million, worse than the estimated $-33.18 million [4] - Segment operating income for Paper was $25.8 million, below the estimated $37.99 million [4]

Exhibit 99.1 Diluted earnings per share attributable to Packaging Corporation of America shareholders | | | | Three Months Ended | | | | | --- | --- | --- | --- | --- | --- | --- | | | | | June 30, | | | | | | 2025 | | 2024 | | Change | | | Reported Diluted EPS | $ | 2.67 | $ | 2.21 | $ | 0.46 | | (1) Special Items (Income)/Expense | | (0.19) | | — | | (0.19) | | (2) (3) Diluted EPS excluding Special Items | $ | 2.48 | $ | 2.20 | $ | 0.28 | For descriptions and amounts of our special items, see the schedule ...

Core Insights - Packaging Corporation of America (PKG) is expected to report second-quarter 2025 results on July 23, with projected revenues of $2.16 billion, reflecting a 4.1% year-over-year growth [1] - The consensus estimate for earnings per share (EPS) is $2.44, indicating a 10.9% increase from the previous year [2] Revenue and Earnings Estimates - The Zacks Consensus Estimate for PKG's second-quarter revenues is $2.16 billion, showing a 4.1% growth compared to the same quarter last year [1] - The earnings estimate has increased by 0.4% over the past 60 days, with the current EPS estimate at $2.44 [2] - The Packaging segment is expected to generate revenues of $1.99 billion, representing a 4.2% increase year-over-year [7] Performance Metrics - PKG's earnings surprise history shows that the company has beaten the Zacks Consensus Estimates in three of the last four quarters, with an average surprise of 3.4% [3][4] - The company is projected to see a 2.7% increase in packaging volume, while the Paper segment is expected to experience a 6.9% decline in revenues [6][8] Segment Analysis - The Paper segment is anticipated to report revenues of $140 million, down 6.9% year-over-year, but with a significant 75% increase in operating income to $46 million due to better pricing and mix [8] - The Packaging segment's operating income is estimated to be $291 million, reflecting a 4% growth from the prior year [7] Stock Performance - Over the past year, PKG shares have increased by 7.7%, outperforming the industry average decline of 7.1% [9]

Core Viewpoint - Investors are seeking growth stocks that can deliver above-average growth and exceptional returns, but identifying such stocks is challenging due to their inherent risks and volatility [1] Group 1: Company Overview - Packaging Corp. (PKG) is identified as a cutting-edge growth stock with a favorable Growth Score and a top Zacks Rank [2] - The company is a maker of containerboard and corrugated packaging products [3] Group 2: Earnings Growth - Historical EPS growth rate for Packaging Corp. is 8%, but projected EPS growth for this year is 13.2%, significantly higher than the industry average of 2.9% [5] Group 3: Asset Utilization - Packaging Corp. has an asset utilization ratio (sales-to-total-assets ratio) of 0.96, indicating it generates $0.96 in sales for every dollar in assets, outperforming the industry average of 0.81 [7] - The company's sales are expected to grow by 5.1% this year, compared to the industry average of 3.1% [7] Group 4: Earnings Estimate Revisions - There has been a positive trend in earnings estimate revisions for Packaging Corp., with the Zacks Consensus Estimate for the current year increasing by 0.2% over the past month [8] Group 5: Investment Potential - Packaging Corp. has earned a Growth Score of A and carries a Zacks Rank 2 due to positive earnings estimate revisions, indicating it is a potential outperformer and a solid choice for growth investors [10]

Company Overview - Packaging Corp. (PKG) is expected to report a year-over-year increase in earnings, with a projected EPS of $2.44, reflecting a +10.9% change, and revenues of $2.16 billion, up 4.1% from the previous year [3][12]. Earnings Expectations - The earnings report is anticipated to be released on July 23, and the stock may rise if the results exceed expectations, while a miss could lead to a decline [2][12]. - The consensus EPS estimate has been revised 0.59% higher in the last 30 days, indicating a positive reassessment by analysts [4]. Earnings Surprise Prediction - The Most Accurate Estimate for Packaging Corp. is higher than the Zacks Consensus Estimate, resulting in an Earnings ESP of +0.77%, suggesting a strong likelihood of beating the consensus EPS estimate [12]. - The company currently holds a Zacks Rank of 2 (Buy), which enhances the predictive power of the Earnings ESP [12][10]. Historical Performance - In the last reported quarter, Packaging Corp. exceeded the expected EPS of $2.21 by delivering $2.31, resulting in a surprise of +4.52% [13]. - Over the past four quarters, the company has beaten consensus EPS estimates three times [14]. Industry Context - Another player in the Containers - Paper and Packaging industry, Avery Dennison (AVY), is expected to report earnings of $2.38 per share, indicating a year-over-year decline of -1.7% [18]. - Avery Dennison's revenues are projected to be $2.23 billion, down 0.2% from the previous year, with a negative Earnings ESP of -0.42% [19][20].

Company Overview - Packaging Corporation of America is the third largest producer of containerboard products and a leading producer of uncoated freesheet paper in North America, operating eight mills and 86 corrugated products manufacturing plants [12]. Investment Insights - Packaging Corporation of America (PKG) holds a Zacks Rank of 3 (Hold) and has a VGM Score of A, indicating a solid overall performance [12]. - The Momentum Style Score for PKG is B, with shares increasing by 4.5% over the past four weeks, suggesting positive momentum [13]. - For fiscal 2025, one analyst has revised their earnings estimate upwards in the last 60 days, with the Zacks Consensus Estimate increasing by $0.08 to $10.35 per share [13]. - PKG has an average earnings surprise of 3.4%, indicating a history of exceeding earnings expectations [13].