X0306 4 2020-12-14 0 0000886346 KADANT INC KAI 0001251663 MCKENNEY MICHAEL J KADANT INC. ONE TECHNOLOGY PARK DRIVE WESTFORD MA 01886 0 1 0 0 Executive Vice President & CFO Common Stock 2020-12-14 4 M 0 1500 21.91 A 20164.009 D Common Stock 2020-12-14 4 S 0 1500 134.4304 D 18664.009 D Common Stock 2020-12-14 4 M 0 2144 21.91 A 20808.009 D Common Stock 2020-12-14 4 S 0 2144 135.389 D 18664.009 D Common Stock 2020-12-14 4 M 0 600 21.91 A 19264.009 D Common Stock 2020-12-14 4 S 0 600 136.2817 D 18664.009 D Common Stock 2020-12-14 4 S 0 755 135.10 D 17909.009 D Common Stock 2020-12-15 4 S 0 517 134.72 D 17392.009 D Stock Option (Right to Buy) 21.91 2020-12-14 4 M 0 1500 0 D 2022-03-07 Common Stock 1500.0 2744 D Stock Option (Right to Buy) 21.91 2020-12-14 4 M 0 2144 0 D 2022-03-07 Common Stock 2144.0 600 D Stock Option (Right to Buy) 21.91 2020-12-14 4 M 0 600 0 D 2022-03-07 Common Stock 600.0 0 D The transactions reported on this Form 4 were executed pursuant to a Rule 10b5-1 trading plan adopted November 13, 2020. Represents the weighted average sale price. The actual sales prices range from $133.89 to $134.80 per share. The reporting person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request. Represents the weighted average sale price. The actual sales prices range from $134.95 to $135.89 per share. The reporting person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request. Represents the weighted average sale price. The actual sales prices range from $135.99 to $136.80 per share. The reporting person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request. This stock option is fully vested. /s/ Stacy D. Krause, by power of attorney 2020-12-15