CECO ENVIRONMENTAL CORP

Ticker: CECO CUSIP: 125141101 Class: Common Stock

NEW YORK STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0000314969)

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

Q2 2017

Shares 2,600 Value ($000) $24 Avg Close $9.92 Range $8.79 - $11.82

Q1 2017

Shares 2,500 Value ($000) $26 Avg Close $11.77 Range $9.60 - $14.11

Q4 2016

Shares 2,600 Value ($000) $36 Avg Close $11.85 Range $9.25 - $14.45

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2017	2,600	$24	$9.92	$8.79 - $11.82
Q1 2017	2,500	$26	$11.77	$9.60 - $14.11
Q4 2016	2,600	$36	$11.85	$9.25 - $14.45