CECO ENVIRONMENTAL CORP

Ticker: CECO CUSIP: 125141101 Class: Common Stock

ARDSLEY ADVISORY PARTNERS LP's Holding History (CIK: 0000900529)

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

Q3 2015

Shares 339,929 Value ($000) $2,784 Avg Close $8.73 Range $7.44 - $10.69

Q2 2015

Shares 244,300 Value ($000) $2,748 Avg Close $10.56 Range $9.75 - $11.83

Q1 2015

Shares 154,300 Value ($000) $1,637 Avg Close $12.49 Range $9.44 - $14.44

Q4 2014

Shares 84,300 Value ($000) $1,310 Avg Close $12.83 Range $11.36 - $14.63

Q3 2014

Shares 116,300 Value ($000) $1,558 Avg Close $12.99 Range $12.21 - $14.60

Q2 2014

Shares 146,300 Value ($000) $2,281 Avg Close $13.93 Range $11.84 - $15.72

Q1 2014

Shares 197,400 Value ($000) $3,275 Avg Close $14.92 Range $12.89 - $17.13

Q4 2013

Shares 172,000 Value ($000) $2,778 Avg Close $14.61 Range $12.57 - $17.55

Q3 2013

Shares 67,000 Value ($000) $943 Avg Close $11.80 Range $10.63 - $12.79

Q2 2013

Shares 50,000 Value ($000) $615 Avg Close $10.81 Range $9.36 - $11.81

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2015	339,929	$2,784	$8.73	$7.44 - $10.69
Q2 2015	244,300	$2,748	$10.56	$9.75 - $11.83
Q1 2015	154,300	$1,637	$12.49	$9.44 - $14.44
Q4 2014	84,300	$1,310	$12.83	$11.36 - $14.63
Q3 2014	116,300	$1,558	$12.99	$12.21 - $14.60
Q2 2014	146,300	$2,281	$13.93	$11.84 - $15.72
Q1 2014	197,400	$3,275	$14.92	$12.89 - $17.13
Q4 2013	172,000	$2,778	$14.61	$12.57 - $17.55
Q3 2013	67,000	$943	$11.80	$10.63 - $12.79
Q2 2013	50,000	$615	$10.81	$9.36 - $11.81