| SC 13G/A | 2018-02-09 | DIMENSIONAL FUND ADVISORS LP | Great Lakes Dredge & Dock CORP | 5,215,739 | 8.5% | EDGAR |
| SC 13G/A | 2018-02-08 | WELLINGTON MANAGEMENT GROUP LLP | Great Lakes Dredge & Dock CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2018-02-05 | JENNISON ASSOCIATES LLC | Great Lakes Dredge & Dock CORP | 4,941,042 | 8.0% | EDGAR |
| SC 13G/A | 2018-01-26 | PRUDENTIAL FINANCIAL INC | Great Lakes Dredge & Dock CORP | 4,946,537 | 8.0% | EDGAR |
| SC 13G/A | 2018-01-25 | BlackRock Inc. | Great Lakes Dredge & Dock CORP | 3,772,579 | 6.1% | EDGAR |
| SC 13G/A | 2017-02-10 | Boston Partners | Great Lakes Dredge & Dock CORP | 4,559,006 | 7.5% | EDGAR |
| SC 13G/A | 2017-02-09 | WELLINGTON MANAGEMENT GROUP LLP | Great Lakes Dredge & Dock CORP | 3,763,560 | 6.2% | EDGAR |
| SC 13G/A | 2017-02-09 | DIMENSIONAL FUND ADVISORS LP | Great Lakes Dredge & Dock CORP | 5,150,558 | 8.4% | EDGAR |
| SC 13G/A | 2017-02-03 | JENNISON ASSOCIATES LLC | Great Lakes Dredge & Dock CORP | 4,091,923 | 6.7% | EDGAR |
| SC 13G/A | 2017-01-24 | BlackRock Inc. | Great Lakes Dredge & Dock CORP | 3,887,915 | 6.4% | EDGAR |
| SC 13D/A | 2017-01-03 | Privet Fund Management LLC | Great Lakes Dredge & Dock CORP | 3,020,425 | 5.0% | EDGAR |
| SC 13D | 2016-11-21 | Privet Fund Management LLC | Great Lakes Dredge & Dock CORP | 3,020,425 | 5.0% | EDGAR |
| SC 13G/A | 2016-02-11 | WELLINGTON MANAGEMENT GROUP LLP | Great Lakes Dredge & Dock CORP | 3,241,946 | 5.4% | EDGAR |
| SC 13G/A | 2016-02-09 | Boston Partners | Great Lakes Dredge & Dock CORP | 6,362,970 | 10.5% | EDGAR |
| SC 13G/A | 2016-02-09 | DIMENSIONAL FUND ADVISORS LP | Great Lakes Dredge & Dock CORP | 4,978,488 | 8.2% | EDGAR |
| SC 13G/A | 2016-02-05 | JENNISON ASSOCIATES LLC | Great Lakes Dredge & Dock CORP | 5,010,933 | 8.3% | EDGAR |
| SC 13G/A | 2016-01-26 | BlackRock Inc. | Great Lakes Dredge & Dock CORP | 3,416,514 | 5.7% | EDGAR |
| SC 13G/A | 2015-11-06 | Boston Partners | Great Lakes Dredge & Dock CORP | 6,094,209 | 10.1% | EDGAR |
| SC 13G/A | 2015-02-12 | WELLINGTON MANAGEMENT GROUP LLP | Great Lakes Dredge & Dock CORP | 3,580,093 | 6.0% | EDGAR |
| SC 13G/A | 2015-02-11 | JENNISON ASSOCIATES LLC | Great Lakes Dredge & Dock CORP | 5,463,934 | 9.1% | EDGAR |