But other industry stocks also showed significant gains with KapStone Paper and Packaging (KS), PF Glatfelter (GLT), Domtar (UFS), Neenah Paper (NP), Clearwater Paper (CLW) and Sonoco Products (SON) gaining 6.2%, 5.6%, 4.2%, 4.4%, 3.3% and 3.2%, respectively, during the same two-day period.