X0306 4 2021-03-04 0 0001441236 Clearwater Paper Corp CLW 0001814660 Shufelt Joanne P. 601 W. RIVERSIDE AVE. SUITE 1100 SPOKANE WA 99201 0 1 0 0 SVP, GM, CPD Common Stock 2021-03-04 4 A 0 654 36.51 A 24089 D Common Stock 2021-03-04 4 F 0 174 36.51 D 23915 D Common Stock 2021-03-04 4 A 0 3924 36.51 A 27839 D Common Stock 2021-03-05 4 F 0 97 36.33 D 27742 D Common Stock 2021-03-07 4 F 0 143 36.33 D 27599 D Represents aggregate number of shares of common stock issuable in settlement of 2018-2020 Performance Share Grant. Represents shares withheld by Clearwater Paper Corporation to satisfy tax witholding requirements due at settlement of 2018-2020 Performance Share Grant. Represents award of restricted stock units ("RSUs"). RSUs may be settled only for shares of common stock on a one-for-one basis. Represents award of RSUs that will vest 33%, 33%, 34% on March 4, 2022, 2023 and 2024, respectively, assuming continued employment. During the vesting period, an amount equal to the dividends that would have been paid on the RSUs had they been in the form of common stock will be converted into additional RSUs. Represents shares withheld by Clearwater Paper Corporation to satisfy tax withholding requirements due at settlement of restricted stock units that vested March 5, 2021. Represents shares withheld by Clearwater Paper Corporation to satisfy tax withholding requirements due at settlement of restricted stock units that vested March 7, 2021. /s/Michael S. Gadd, Attorney-in-fact 2021-03-08