Levi & Korsinsky, LLP announces that it has commenced an investigation of Great Lakes Dredge & Dock Corporation (“Great Lakes Dredge & Dock” or the “Company”) (NASDAQGS:GLDD) concerning possible violations of federal securities laws by certain officers and directors.

On October 14, 2015, Great Lakes Dredge & Dock announced that Senior Vice President, Chief Legal Officer and Corporate Secretary Maryann A. Waryjas, would resign effective November 10, 2015. Then on October 16, 2015, after the market’s close, the Company announced it has “initiated a process to review potential strategic alternatives to enhance stockholder value” and that it would withdraw its previously announced Adjusted EBITDA guidance for the year ending December 31, 2015. Great Lakes Dredge & Dock also announced that CEO and director Jonathan W. Berger announced his intention to retire, effective in 2017, and that on October 13, 2015, both Nathan D. Leight, director and Chairman of the Board, and Denise E. Dickins, director and Chair of the Audit Committee, tendered their resignations effective immediately. Upon this news, shares of Great Lakes Dredge & Dock have fallen more than 20% on intraday trading on October 19, 2015. To obtain additional information about the investigation, go to:

http://zlk.9nl.com/great-lakes-dredge-dock

or contact Joseph E. Levi, Esq. either via email at jlevi@zlk.com or by telephone at (212) 363-7500, toll-free: (877) 363-5972.

Levi & Korsinsky is a national firm with offices in New York, New Jersey, Connecticut and Washington D.C. The firm’s attorneys have extensive expertise in prosecuting securities litigation involving financial fraud, representing investors throughout the nation in securities and shareholder lawsuits. Attorney advertising. Prior results do not guarantee similar outcomes.