CECO ENVIRONMENTAL CORP

Ticker: CECO CUSIP: 125141101 Class: Common Stock

CASTLEARK MANAGEMENT LLC's Holding History (CIK: 0001106832)

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

Q4 2025

Shares 156,505 Value ($000) $9,367 Avg Close $53.49 Range $42.82 - $63.98

Q3 2025

Shares 153,385 Value ($000) $7,853 Avg Close $42.33 Range $28.26 - $52.46

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	156,505	$9,367	$53.49	$42.82 - $63.98
Q3 2025	153,385	$7,853	$42.33	$28.26 - $52.46