X0206 3 2018-06-21 0 0001705843 Calyxt, Inc. CLXT 0001745263 Dutang Eric 600 COUNTY ROAD D W SUITE 8 NEW BRIGHTON MN 55112 1 Chief Financial Officer Common Stock 94530 D Stock Option (Right to Buy) 3.5878 2026-04-07 Common Stock 39425 D Stock Option (Right to Buy) 13.2939 2027-06-14 Common Stock 147000 D Includes 83,300 restricted stock units with respect to Calyxt, Inc. common stock, which were granted on June 14, 2017, and remain unvested; 14,700 shares will vest on the second anniversary of the grant date, with the remainder vesting quarterly in equal installments over the following 42 months. The stock option was granted on April 7, 2016. 20% vested on the grant date, 10% vested on the first anniversary of the grant date and an additional 25% vested on completion of the initial public offering by Calyxt, Inc. The remainder vests quarterly in equal 5% installments. The stock option was granted on June 14, 2017 and vests 15% on the first anniversary of the grant date and 15% on the second anniversary of the grant date, with the remainder vesting quarterly in equal installments over the following 42 months. /s/ David M. Vander Haar, attorney-in-fact for Mr. Dutang 2018-07-02