By 2010, the firm was ranked 5th in Fortune Magazine's list of 100 Fastest-Growing Companies.

In July 2008, it acquired the Charleston kraft paper mill from MeadWestvaco.

On October 31, 2011, KapStone acquired U.S.Corrugated, Inc.[7][8][9] It was started in 2006 by Dennis Mehiel, and primarily produces corrugated industrial packaging,[10] with manufacturing facilities in seven states.

[11][12] KapStone acquired Longview Fibre Paper and Packaging from Brookfield Asset Management on July 18, 2013 .

[13] Two years later, on June 1, 2015, it acquired Victory Packaging, headquartered in Houston, Texas.