UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 (Exact name of registrant as specified in its charter) For the quarterly period ended March 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-33225 Great Lakes Dredge & Dock Corporation Delaware 20-5336063 (State or other jur ...

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q1 2019 Earnings Conference Call April 30, 2019 10:00 AM ET Company Participants Abby Sullivan – Manager of Investor Relations Lasse Petterson – Chief Executive Officer Mark Marinko – Chief Financial Officer Conference Call Participants Poe Fratt – Noble Capital Markets DeForest Hinman – Walthausen & Co. Jon Tanwanteng – CJS Securities Matt Baxter – Wynne Capital Operator Good day, ladies and gentlemen, and welcome to the Great Lakes Dredge & Dock Corporat ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-33225 Great Lakes Dredge & Dock Corporation (Exact name of registrant as specified in its charter) Delaware 20-5336063 (State or oth ...

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q4 2018 Results Earnings Conference Call February 20, 2019 10:00 AM ET Company Participants Abby Sullivan - Manager of Investor Relations, Financial Planning & Analysis Lasse Petterson - Chief Executive Officer, Director Mark Marinko - Senior Vice President, Chief Financial Officer Conference Call Participants Andrew Casella - Deutsche Bank John Tanwanteng - CJS Securities Joseph Farricielli - William Blair Poe Fratt - Noble Capital Markets DeForest Hinman ...