SC 13G/A

Great Lakes Dredge & Dock Corp

Security class unavailable · CUSIP: 390607109

Event date: 2017-12-31

Legacy cover-page extraction is best effort and may not include every reporting person.

Filing-level shares

2,666,042

Percent of class

4.3200%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.