CECO ENVIRONMENTAL CORP

Ticker: CECO CUSIP: 125141101 Class: Common Stock

Twin Tree Management, LP's Holding History (CIK: 0001535588)

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

Q4 2018

Shares 523 Value ($000) $4 Avg Close $7.66 Range $6.44 - $8.69

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	523	$4	$7.66	$6.44 - $8.69