GREAT LAKES DREDGE & DOCK CO

Ticker: GLDD CUSIP: 390607109 Class: Common Stock

ACK Asset Management LLC's Holding History (CIK: 0001510940)

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

Q4 2013

Shares 570,800 Value ($000) $5,251 Avg Close $8.38 Range $6.99 - $9.33

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2013	570,800	$5,251	$8.38	$6.99 - $9.33