DIRTT ENVIRONMENTAL SOLUTION

Ticker: DRTTF CUSIP: 25490H106 Class: FGC

CULLEN/FROST BANKERS, INC.'s Holding History (CIK: 0000039263)

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

Q4 2022

Shares 30,000 Value ($000) $16 Avg Close $0.36 Range $0.20 - $0.76

Q4 2021

Shares 15,000 Value ($000) $33 Avg Close $2.56 Range $1.63 - $3.34

Q2 2020

Shares 15,000 Value ($000) $18 Avg Close $1.20 Range $0.83 - $1.78

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2022	30,000	$16	$0.36	$0.20 - $0.76
Q4 2021	15,000	$33	$2.56	$1.63 - $3.34
Q2 2020	15,000	$18	$1.20	$0.83 - $1.78