With a market cap of $18.5 billion, Packaging Corporation of America (PKG) is a leading North American producer of containerboard and uncoated freesheet paper. The company operates through two segments: Packaging and Paper, offering products ranging from corrugated shipping containers and retail displays to commodity, specialty, and communication papers. Companies valued at more than $10 billion are generally considered “large-cap” stocks, and Packaging Corporation of America fits this criterion perfectl ...