DIRTT ENVIRONMENTAL SOLUTION

Ticker: DRTTF CUSIP: 25490H106 Class: FGC

MARSHALL WACE, LLP's Holding History (CIK: 0001318757)

Note: Option positions (PUT/CALL) are excluded.

Q2 2020

Shares 20,825 Value ($000) $25 Avg Close $1.20 Range $0.83 - $1.78

Q1 2020

Shares 67,425 Value ($000) $67 Avg Close $2.29 Range $0.71 - $3.48

Q4 2019

Shares 92,336 Value ($000) $303 Avg Close $3.80 Range $3.01 - $4.96

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2020	20,825	$25	$1.20	$0.83 - $1.78
Q1 2020	67,425	$67	$2.29	$0.71 - $3.48
Q4 2019	92,336	$303	$3.80	$3.01 - $4.96