GREAT LAKES DREDGE & DOCK CO

Ticker: GLDD CUSIP: 390607109 Class: Common Stock

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

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

Q4 2014

Shares 24,400 Value ($000) $209 Avg Close $7.24 Range $5.84 - $8.73

Q3 2013

Shares 50,000 Value ($000) $372 Avg Close $7.43 Range $6.28 - $8.69

Q2 2013

Shares 101,700 Value ($000) $795 Avg Close $7.58 Range $6.30 - $8.66

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	24,400	$209	$7.24	$5.84 - $8.73
Q3 2013	50,000	$372	$7.43	$6.28 - $8.69
Q2 2013	101,700	$795	$7.58	$6.30 - $8.66