Packaging Corporation of America

Packaging Corporation of America is the third-largest producer of containerboard products and a leading producer of uncoated freesheet paper in North America, generating $8,989 million in revenue in fiscal 2025 across ten mills and 91 corrugated products plants. Headquartered in Lake Forest, Illinois, the company is a vertically integrated converter: roughly 90% of the containerboard its mills produce is consumed internally by its own box plants, which turn it into shipping containers, displays, and protective packaging sold to approximately 12,000 customers.

This is a story about a mill system and box-plant network that has absorbed a transformative acquisition while navigating one of the most inflationary cost environments in recent memory. In September 2025, PCA closed the $1.8 billion purchase of Greif's containerboard business, adding roughly 800,000 tons of annual mill capacity and eight converting plants, financed with $1.5 billion of new debt. The question the file turns on is whether PCA can convert that acquired capacity into the same kind of integrated margin structure that has defined its legacy business — and whether containerboard pricing power holds up long enough for the math to work.

The market is pricing PCA at roughly 13.4 times trailing EBITDA and 28 times trailing earnings, reflecting a view that the Greif integration will deliver and that containerboard markets remain tight. The bull case is straightforward: scarce domestic capacity, a disciplined management team with a 15-year track record of capital allocation, and a business model in which the mill feeds the box plant rather than chasing spot containerboard markets. The bear case is equally straightforward: $3.97 billion of gross debt, persistent input-cost inflation, and a corrugated market that, for all its tightness today, has historically proven cyclical.