X0306 4 2020-06-29 0 0001705843 Calyxt, Inc. CLXT 0001753563 Blome James 2800 MOUNT RIDGE ROAD ROSEVILLE MN 55113 0 1 0 0 Chief Executive Officer Common Stock 2020-06-29 4 S 0 2902 5.0075 D 198057 D Common Stock 2020-07-01 4 S 0 3495 4.6547 D 194562 D The price reported in Column 4 is a weighted average. These shares were sold in multiple transactions at prices ranging from $4.955 to $5.03, inclusive. The price reported in Column 4 is a weighted average. These shares were sold in multiple transactions at prices ranging from $4.55 to $4.9458, inclusive. Debra Frimerman, Attorney-in-Fact for James Blome 2020-07-31