With a market cap of $19 billion, Packaging Corporation of America (PKG) is the third-largest producer of containerboard and a leading producer of uncoated freesheet paper in North America. The company operates through two main segments: Packaging and Paper, offering a wide range of corrugated packaging products, commodity and specialty papers, and communication papers. Companies valued at more than$10 billion are generally considered “large-cap” stocks, and Packaging Corporation fits this criterion perf ...