X0306 4 2019-05-03 0 0001441236 Clearwater Paper Corp CLW 0001450645 Massman Linda K 601 W. RIVERSIDE AVENUE SUITE 1100 SPOKANE WA 99201 1 1 0 0 President and CEO Common Stock 2019-05-03 4 P 0 5500 17.9241 A 243976 D The price reported in column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $17.87 to $18.14, inclusive. The reporting person undertakes to provide to Clearwater Paper Corporation, any security holder of Clearwater Paper Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this form 4. /s/ Michael S. Gadd 2019-05-03