Name	Relationship / Title	Current Shares	Trading Activity
Albert, Carl A.	Director	15,399	View
Date	Type	Shares Traded	Price Range USD
12/30/2011	Acquisition (Non Open Market)	2,810	n/a
09/30/2011	Acquisition (Non Open Market)	3,839	n/a
06/30/2011	Acquisition (Non Open Market)	2,800	n/a
03/31/2011	Acquisition (Non Open Market)	2,047	n/a
12/31/2010	Acquisition (Non Open Market)	2,120	n/a
09/30/2010	Acquisition (Non Open Market)	1,783	n/a
09/10/2010	Buy	9,000	4.79 - 4.85
09/09/2010	Buy	1,000	4.79
Berger, Jonathan W.	Officer	140,736	View
Date	Type	Shares Traded	Price Range USD
06/27/2011	Acquisition (Non Open Market)	70,356	n/a
06/27/2011	Acquisition (Non Open Market)	70,356	n/a
06/27/2011	Acquisition (Non Open Market)	70,356	n/a
06/27/2011	Acquisition (Non Open Market)	70,356	n/a
03/14/2011	Acquisition (Non Open Market)	16,490	n/a
03/14/2011	Acquisition (Non Open Market)	16,490	n/a
03/14/2011	Acquisition (Non Open Market)	16,490	n/a
03/14/2011	Acquisition (Non Open Market)	16,490	n/a
09/30/2010	Acquisition (Non Open Market)	2,017	n/a
09/30/2010	Acquisition (Non Open Market)	2,017	n/a
09/30/2010	Acquisition (Non Open Market)	2,017	n/a
09/30/2010	Acquisition (Non Open Market)	2,017	n/a
09/27/2010	Acquisition (Non Open Market)	9,208	n/a
09/27/2010	Acquisition (Non Open Market)	9,208	n/a
09/27/2010	Acquisition (Non Open Market)	9,208	n/a
09/27/2010	Acquisition (Non Open Market)	9,208	n/a
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
10/08/2009	Acquisition (Non Open Market)	3,532	n/a
10/08/2009	Acquisition (Non Open Market)	3,532	n/a
10/08/2009	Acquisition (Non Open Market)	3,532	n/a
10/08/2009	Acquisition (Non Open Market)	3,532	n/a
09/30/2009	Acquisition (Non Open Market)	1,074	n/a
09/30/2009	Acquisition (Non Open Market)	1,074	n/a
09/30/2009	Acquisition (Non Open Market)	1,074	n/a
09/30/2009	Acquisition (Non Open Market)	1,074	n/a
09/15/2009	Sell	203	6.72
09/15/2009	Sell	203	6.72
09/15/2009	Sell	203	6.72
09/15/2009	Sell	203	6.72
09/30/2008	Acquisition (Non Open Market)	1,188	n/a
09/30/2008	Acquisition (Non Open Market)	1,188	n/a
09/30/2008	Acquisition (Non Open Market)	1,188	n/a
09/30/2008	Acquisition (Non Open Market)	1,188	n/a
06/30/2008	Acquisition (Non Open Market)	1,227	n/a
06/30/2008	Acquisition (Non Open Market)	1,227	n/a
06/30/2008	Acquisition (Non Open Market)	1,227	n/a
06/30/2008	Acquisition (Non Open Market)	1,227	n/a
05/20/2008	Acquisition (Non Open Market)	1,386	n/a
05/20/2008	Acquisition (Non Open Market)	1,386	n/a
05/20/2008	Acquisition (Non Open Market)	1,386	n/a
05/20/2008	Acquisition (Non Open Market)	1,386	n/a
12/26/2006	Statement of Ownership	0	n/a
12/26/2006	Statement of Ownership	0	n/a
12/26/2006	Statement of Ownership	0	n/a
12/26/2006	Statement of Ownership	0	n/a
Biemeck, Bruce J.	Officer	71,242	View
Date	Type	Shares Traded	Price Range USD
06/27/2011	Acquisition (Non Open Market)	18,762	n/a
06/27/2011	Acquisition (Non Open Market)	18,762	n/a
06/27/2011	Acquisition (Non Open Market)	18,762	n/a
06/27/2011	Acquisition (Non Open Market)	18,762	n/a
03/14/2011	Acquisition (Non Open Market)	16,490	n/a
03/14/2011	Acquisition (Non Open Market)	16,490	n/a
03/14/2011	Acquisition (Non Open Market)	16,490	n/a
03/14/2011	Acquisition (Non Open Market)	16,490	n/a
09/30/2010	Acquisition (Non Open Market)	2,017	n/a
09/30/2010	Acquisition (Non Open Market)	2,017	n/a
09/30/2010	Acquisition (Non Open Market)	2,017	n/a
09/30/2010	Acquisition (Non Open Market)	2,017	n/a
09/27/2010	Acquisition (Non Open Market)	9,208	n/a
09/27/2010	Acquisition (Non Open Market)	9,208	n/a
09/27/2010	Acquisition (Non Open Market)	9,208	n/a
09/27/2010	Acquisition (Non Open Market)	9,208	n/a
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
10/08/2009	Acquisition (Non Open Market)	3,532	n/a
10/08/2009	Acquisition (Non Open Market)	3,532	n/a
10/08/2009	Acquisition (Non Open Market)	3,532	n/a
10/08/2009	Acquisition (Non Open Market)	3,532	n/a
09/30/2009	Acquisition (Non Open Market)	1,074	n/a
09/30/2009	Acquisition (Non Open Market)	1,074	n/a
09/30/2009	Acquisition (Non Open Market)	1,074	n/a
09/30/2009	Acquisition (Non Open Market)	1,074	n/a
09/30/2008	Acquisition (Non Open Market)	1,188	n/a
09/30/2008	Acquisition (Non Open Market)	1,188	n/a
09/30/2008	Acquisition (Non Open Market)	1,188	n/a
09/30/2008	Acquisition (Non Open Market)	1,188	n/a
06/30/2008	Acquisition (Non Open Market)	1,227	n/a
06/30/2008	Acquisition (Non Open Market)	1,227	n/a
06/30/2008	Acquisition (Non Open Market)	1,227	n/a
06/30/2008	Acquisition (Non Open Market)	1,227	n/a
05/20/2008	Acquisition (Non Open Market)	1,386	n/a
05/20/2008	Acquisition (Non Open Market)	1,386	n/a
05/20/2008	Acquisition (Non Open Market)	1,386	n/a
05/20/2008	Acquisition (Non Open Market)	1,386	n/a
12/26/2006	Statement of Ownership	0	n/a
12/26/2006	Statement of Ownership	0	n/a
12/26/2006	Statement of Ownership	0	n/a
12/26/2006	Statement of Ownership	0	n/a
Bittel, Stephen H.	Director	97,375	View
Date	Type	Shares Traded	Price Range USD
12/30/2011	Acquisition (Non Open Market)	2,810	n/a
09/30/2011	Acquisition (Non Open Market)	3,839	n/a
09/30/2011	Buy	1,587	4.06
09/29/2011	Buy	5,000	4.05
09/22/2011	Buy	3,892	4.11
09/21/2011	Buy	10,000	4.38
09/20/2011	Buy	5,000	4.46
09/13/2011	Buy	2,000	4.45
09/09/2011	Buy	10,000	4.47
09/06/2011	Buy	600	4.44
08/08/2011	Buy	10,000	4.51 - 4.53
08/04/2011	Buy	10,000	5.00
06/30/2011	Acquisition (Non Open Market)	2,800	n/a
03/31/2011	Acquisition (Non Open Market)	2,047	n/a
01/01/2011	Statement of Ownership	0	n/a
Deutsch, Peter R.	Director	61,270	View
Date	Type	Shares Traded	Price Range USD
12/30/2011	Acquisition (Non Open Market)	2,810	n/a
09/30/2011	Acquisition (Non Open Market)	3,839	n/a
06/30/2011	Acquisition (Non Open Market)	2,800	n/a
03/31/2011	Acquisition (Non Open Market)	2,047	n/a
12/31/2010	Acquisition (Non Open Market)	2,120	n/a
09/30/2010	Acquisition (Non Open Market)	2,689	n/a
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
10/08/2009	Acquisition (Non Open Market)	3,532	n/a
09/30/2009	Acquisition (Non Open Market)	1,074	n/a
10/09/2008	Buy	900	4.60
09/30/2008	Acquisition (Non Open Market)	1,188	n/a
06/30/2008	Acquisition (Non Open Market)	1,227	n/a
05/20/2008	Acquisition (Non Open Market)	1,386	n/a
12/26/2006	Statement of Ownership	0	n/a
Johnson, Kyle D.	Officer	61,501	View
Date	Type	Shares Traded	Price Range USD
06/27/2011	Acquisition (Non Open Market)	5,316	n/a
05/27/2010	Acquisition (Non Open Market)	3,684	n/a
09/16/2009	Automatic Sell	2,000	7.13
05/20/2008	Acquisition (Non Open Market)	4,893	n/a
03/19/2007	Acquisition (Non Open Market)	459	5.80
12/26/2006	Statement of Ownership	0	n/a
Karas, John F.	Officer	48,795	View
Date	Type	Shares Traded	Price Range USD
06/27/2011	Acquisition (Non Open Market)	5,003	n/a
05/27/2010	Acquisition (Non Open Market)	3,596	n/a
05/20/2008	Acquisition (Non Open Market)	4,660	n/a
03/30/2007	Automatic Sell	13,770	6.75
03/28/2007	Automatic Sell	130	6.75
03/27/2007	Automatic Sell	100	6.75
03/19/2007	Acquisition (Non Open Market)	459	5.80
12/26/2006	Statement of Ownership	0	n/a
Leight, Nathan D.	Director	1,591,420	View
Date	Type	Shares Traded	Price Range USD
12/30/2011	Acquisition (Non Open Market)	24,910	n/a
09/30/2011	Acquisition (Non Open Market)	3,839	n/a
09/28/2011	Buy	8,000	4.01
08/11/2011	Buy	3,000	4.62
08/10/2011	Buy	25,000	4.51 - 4.54
08/05/2011	Buy	15,000	4.82
06/30/2011	Acquisition (Non Open Market)	2,800	n/a
03/31/2011	Acquisition (Non Open Market)	2,047	n/a
12/31/2010	Acquisition (Non Open Market)	2,120	n/a
09/30/2010	Acquisition (Non Open Market)	2,689	n/a
09/22/2010	Buy	5,000	5.15
09/21/2010	Buy	7,000	4.87
09/20/2010	Buy	6,000	4.65
09/17/2010	Buy	14,000	4.72
09/16/2010	Buy	6,000	4.87
09/09/2010	Acquisition (Non Open Market)	4,000	4.87 - 4.87
09/08/2010	Acquisition (Non Open Market)	4,000	4.72
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
03/11/2010	Acquisition (Non Open Market)	21,000	4.58
03/08/2010	Acquisition (Non Open Market)	7,000	4.46
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
10/08/2009	Acquisition (Non Open Market)	3,532	n/a
09/30/2009	Acquisition (Non Open Market)	1,074	n/a
10/02/2008	Buy	4,000	5.30 - 5.33
09/30/2008	Acquisition (Non Open Market)	1,188	n/a
09/29/2008	Buy	3,000	5.92
06/30/2008	Acquisition (Non Open Market)	1,227	n/a
06/04/2008	Disposition (Non Open Market)	52,000	n/a
05/20/2008	Acquisition (Non Open Market)	1,386	n/a
07/18/2007	Option Execute	275,100	5.00
07/18/2007	Option Execute	510,900	5.00
07/03/2007	Option Execute	14,000	5.00
12/26/2006	Statement of Ownership	0	n/a
Mackie, Douglas B.	Director	60,781	View
Date	Type	Shares Traded	Price Range USD
02/16/2012	Automatic Sell	19,721	7.00
01/24/2012	Automatic Sell	26,454	6.50
01/20/2012	Automatic Sell	39	6.50
12/30/2011	Acquisition (Non Open Market)	2,810	n/a
11/16/2011	Automatic Sell	12,516	6.00
11/15/2011	Automatic Sell	12,484	6.00
09/30/2011	Acquisition (Non Open Market)	3,839	n/a
04/05/2011	Automatic Sell	25,000	7.84
03/29/2011	Automatic Sell	25,000	7.30
03/22/2011	Automatic Sell	25,000	7.30
03/15/2011	Automatic Sell	25,000	7.30
03/08/2011	Automatic Sell	45,000	7.92
03/01/2011	Automatic Sell	45,000	7.68
02/25/2011	Automatic Sell	30,000	7.63
02/24/2011	Sell	12,000	7.52 - 7.53
05/27/2010	Acquisition (Non Open Market)	21,053	n/a
11/17/2008	Automatic Sell	4,000	4.19
10/15/2008	Sell	500	4.92
10/15/2008	Automatic Sell	4,000	4.92
09/15/2008	Sell	500	6.62
09/15/2008	Automatic Sell	4,000	6.62
08/15/2008	Sell	1,000	7.66
08/15/2008	Automatic Sell	4,000	7.66
07/15/2008	Sell	1,000	5.83
07/15/2008	Automatic Sell	4,000	5.83
07/08/2008	Disposition (Non Open Market)	2,500	n/a
06/16/2008	Sell	1,000	5.92
06/16/2008	Sell	4,000	5.92
05/20/2008	Acquisition (Non Open Market)	13,853	n/a
05/15/2008	Automatic Sell	1,000	5.51
05/15/2008	Automatic Sell	4,000	5.51
12/03/2007	Automatic Sell	20,000	8.69
11/21/2007	Automatic Sell	5,000	8.46
11/14/2007	Automatic Sell	19,522	8.50
11/12/2007	Automatic Sell	478	8.50
08/01/2007	Sell	10,500	7.05
06/22/2007	Option Execute	6,000	5.00
03/19/2007	Acquisition (Non Open Market)	1,171	5.80
03/19/2007	Acquisition (Non Open Market)	2,683	5.80
12/26/2006	Statement of Ownership	0	n/a
12/26/2006	Statement of Ownership	0	n/a
Simonelli, David E.	Officer	101,570	View
Date	Type	Shares Traded	Price Range USD
06/27/2011	Acquisition (Non Open Market)	13,759	n/a
05/27/2010	Acquisition (Non Open Market)	13,333	n/a
05/20/2008	Acquisition (Non Open Market)	5,388	n/a
03/19/2007	Acquisition (Non Open Market)	653	5.80
12/26/2006	Statement of Ownership	0	n/a
souleles thomas s	Director	4,809	View
Date	Type	Shares Traded	Price Range USD
12/31/2010	Acquisition (Non Open Market)	2,120	n/a
09/30/2010	Acquisition (Non Open Market)	2,689	n/a
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
08/19/2009	Sell	14,257,572	5.49
08/01/2007	Sell	12,459,462	7.05
03/19/2007	Acquisition (Non Open Market)	101,876	5.80
12/26/2006	Statement of Ownership	0	n/a
Weiss, Jason G.	Director	35,770	View
Date	Type	Shares Traded	Price Range USD
12/30/2011	Acquisition (Non Open Market)	2,810	n/a
09/30/2011	Acquisition (Non Open Market)	3,839	n/a
06/30/2011	Acquisition (Non Open Market)	2,800	n/a
03/31/2011	Acquisition (Non Open Market)	2,047	n/a
12/31/2010	Acquisition (Non Open Market)	2,120	n/a
09/30/2010	Acquisition (Non Open Market)	2,689	n/a
06/30/2010	Acquisition (Non Open Market)	2,604	n/a
06/25/2010	Automatic Sell	10,476	6.32
06/24/2010	Automatic Sell	35,713	6.22
06/23/2010	Automatic Sell	50,000	6.14
06/22/2010	Automatic Sell	5,800	6.25
06/21/2010	Automatic Sell	16,800	6.44
06/18/2010	Automatic Sell	24,716	6.37
06/17/2010	Automatic Sell	28,300	6.48
06/16/2010	Automatic Sell	34,233	6.35
06/14/2010	Automatic Sell	67,700	6.17
06/08/2010	Automatic Sell	5,500	6.02
06/07/2010	Automatic Sell	17,000	6.17
06/04/2010	Automatic Sell	100,000	6.31
06/03/2010	Automatic Sell	100,000	6.42
03/31/2010	Acquisition (Non Open Market)	2,976	n/a
12/31/2009	Acquisition (Non Open Market)	2,411	n/a
10/08/2009	Acquisition (Non Open Market)	3,532	n/a
09/30/2009	Acquisition (Non Open Market)	1,074	n/a
10/06/2008	Buy	10,000	5.00
09/30/2008	Acquisition (Non Open Market)	1,188	n/a
06/30/2008	Acquisition (Non Open Market)	1,227	n/a
06/15/2008	Acquisition (Non Open Market)	584,466	n/a
06/15/2008	Disposition (Non Open Market)	584,466	n/a
06/04/2008	Disposition (Non Open Market)	52,000	n/a
05/20/2008	Acquisition (Non Open Market)	1,386	n/a
08/01/2007	Sell	600,000	7.05
07/18/2007	Option Execute	786,000	5.00
12/26/2006	Statement of Ownership	0	n/a

Stock transaction information provided by EDGAR Online. Great Lakes Dredge & Dock Corporation makes no representation or warranty with respect to any of the information contained herein, takes no responsibility for supplementing, updating or correcting any such information and shall have no liability with respect to any such information. This listing does not include derivatives, such as stock option grants or shares purchased through an employee stock purchase plan. For recent transactions, including derivative transactions, see our Section 16 SEC filings page.