Great Lakes Dredge & Dock Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top 25 shareholders own 67.46% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
9.89%	BlackRock, Inc.	6,627,155	US$58.6m	-10.5%	no data
6.75%	AllianceBernstein L.P.	4,523,737	US$40.0m	-1.74%	0.01%
6.64%	Dimensional Fund Advisors LP	4,448,791	US$39.3m	2.12%	0.01%
6.51%	Jennison Associates LLC	4,359,725	US$38.5m	1.4%	0.02%
5.1%	Harvey Partners, LLC	3,419,000	US$30.2m	0%	3.45%
5.09%	The Vanguard Group, Inc.	3,413,673	US$30.2m	1.45%	no data
3.65%	William Blair Investment Management, LLC	2,445,074	US$21.6m	-0.06%	0.03%
2.92%	TCW Group, Inc.	1,957,938	US$17.3m	0%	0.15%
2.28%	State Street Global Advisors, Inc.	1,528,965	US$13.5m	0.3%	no data
2.2%	Geode Capital Management, LLC	1,474,365	US$13.0m	1.98%	no data
1.96%	Minerva Advisors LLC	1,312,143	US$11.6m	2.83%	7.14%
1.82%	Private Management Group Inc	1,218,088	US$10.8m	-0.41%	0.44%
1.59%	Charles Schwab Investment Management, Inc.	1,064,066	US$9.4m	-2.45%	no data
1.36%	Lasse Petterson	914,105	US$8.1m	0.95%	no data
1.24%	D. E. Shaw & Co., L.P.	830,567	US$7.3m	-0.3%	0.01%
1.19%	Kennedy Capital Management LLC	799,197	US$7.1m	-5.48%	0.15%
1.14%	Wellington Management Group LLP	762,626	US$6.7m	68.9%	no data
0.96%	The London Company of Virginia, LLC	642,744	US$5.7m	0%	0.03%
0.9%	Northern Trust Global Investments	602,585	US$5.3m	-2.59%	no data
0.82%	Prescott Group Capital Management L.L.C.	546,870	US$4.8m	0%	0.66%
0.77%	Centerbook Partners LP	516,104	US$4.6m	144%	0.33%
0.75%	MFP Investors LLC	500,000	US$4.4m	-51.6%	4.72%
0.69%	Renaissance Technologies LLC	463,424	US$4.1m	-30.2%	0.01%
0.66%	Brightline Capital Management, LLC	440,000	US$3.9m	0%	2.38%
0.59%	Oppenheimer + Close, LLC	394,600	US$3.5m	0%	3.11%