X0306 4 2021-03-01 0 0001441236 Clearwater Paper Corp CLW 0001811413 Nelson Ann C 601 W. RIVERSIDE AVE. SUITE 1100 SPOKANE WA 99201 1 0 0 0 Common Stock 2021-03-01 4 P 0 2000 35.20 A 2000 D Common Stock 2021-03-03 4 P 0 1000 36.90 A 3000 D This price represents the weighted average purchase price for mutiple transactions reported on this line. The price of the transactions reported on this line range between $35.11 to $35.29 per share. Upon request by the Commission staff, the issuer or a security holder of the issuer, the reporting person will undertake to provide full information regarding the number of shares purchased at each seperate price within the range. /s/Michael S. Gadd, Attorney-in-Fact 2021-03-04