X0306 4 2020-02-28 0 0001705843 Calyxt, Inc. CLXT 0001604049 Ribeill Yves J C/O CALYXT, INC. 2800 MOUNT RIDGE ROAD ROSEVILLE MN 55113 1 0 0 0 Common Stock 2020-02-28 4 S 0 1700 5.41 D 38320 D Common Stock 2020-02-28 4 S 0 200 5.42 D 38120 D Common Stock 2020-02-28 4 S 0 200 5.425 D 37920 D Common Stock 2020-02-28 4 S 0 894 5.43 D 37026 D Common Stock 2020-02-28 4 S 0 200 5.435 D 36826 D Common Stock 2020-02-28 4 S 0 890 5.44 D 35936 D Common Stock 2020-02-28 4 S 0 802 5.45 D 35134 D Common Stock 2020-02-28 4 S 0 300 5.455 D 34834 D Common Stock 2020-02-28 4 S 0 1100 5.46 D 33734 D Common Stock 2020-02-28 4 S 0 700 5.47 D 33034 D Common Stock 2020-02-28 4 S 0 602 5.48 D 32432 D Common Stock 2020-02-28 4 S 0 1700 5.5 D 30732 D Common Stock 2020-02-28 4 S 0 302 5.51 D 30430 D Common Stock 2020-02-28 4 S 0 400 5.54 D 30030 D The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by reporting person on December 4, 2018. Dr. Andre Choulika, Attorney-in-Fact for Yves J. Ribeill 2020-03-02