X0306 4 2020-09-01 0 0001705843 Calyxt, Inc. CLXT 0001777352 Frey Travis 2800 MOUNT RIDGE ROAD ROSEVILLE MN 55113 0 1 0 0 Chief Technology Officer Common Stock 2020-09-01 4 P 0 150 5.4067 A 2450 D The purchase reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by reporting person on December 11, 2019. The price reported in Column 4 is a weighted average. These shares were purchased in multiple transactions at prices ranging from $5.40 to $5.410, inclusive. Suzette McNally, Attorney-in-Fact for Travis Frey 2020-09-01