X0306 4 2021-09-28 0 0001340476 DIRTT ENVIRONMENTAL SOLUTIONS LTD DRTT 0001788764 Krause Geoffrey D. 7303-30TH STREET SE CALGARY A0 T2C 1N6 ALBERTA, CANADA 0 1 0 0 Chief Financial Officer Performance Share Units 2021-09-28 4 A 0 16432 0.00 A 118545 D Performance Share Units 2021-09-28 4 D 0 16432 3.23 D 102113 D The price used to calculate the settlement value of the Performance Share Units was C$4.09, which was the Fair Market Value (as that term is defined in the Issuer's Performance Share Unit Plan) of the Issuer's Common Shares on September 28, 2021, converted from Canadian dollars to U.S. dollars using the Bank of Canada daily average exchange rate on September 28, 2021 of C$1.268 = US $1.00. /s/ Nandini Somayaji, as attorney-in-fact for Geoffrey Krause 2021-09-30