Aerial view of a global Smurfit Westrock containerboard mill yard

Smurfit Westrock Company Guide: The World's Largest Containerboard Maker at 23M Tons Capacity

Smurfit Westrock (NYSE: SW), formed in July 2024 through the merger of Smurfit Kappa and WestRock, is the world’s largest containerboard and paper-packaging company, with 23M short tons of annual mill capacity and 63 paper mills across 40 countries. This guide covers the company profile, the two legacy groups behind it, the main containerboard grades, the first year of post-merger integration, and what the Korean paper-packaging industry should take away.

May 4, 2026 · PackingMaster