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 For the quarterly period ended March 31, 2021 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 other jur ...

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, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Commission file number: 001-33225 Great Lakes Dredge & Dock Corporation (Exact name of registrant as specified in its charter) (State or other jurisdiction of i ...

Great Lakes Dredge & Dock Corp. (NASDAQ:GLDD) Q4 2020 Earnings Conference Call February 17, 2021 10:00 AM ET Company Participants Tina Baginskis - Director of Investor Relations Lasse Petterson - Chief Executive Officer & President Mark Marinko - Chief Financial Officer Conference Call Participants Jon Tanwanteng - CJS Securities DeForest Hinman - Walthausen & Company Poe Fratt - Noble Capital Operator Ladies and gentlemen, thank you for standing by and welcome to the Q4 2020 Great Lakes Dredge & Dock Corp. ...

Dredging Worldwide Since 1890. GREAT LAKES DREDGE & DOCK CORPORATION NOBLE CAPITAL MARKETS' SEVENTEENTH ANNUAL INVESTOR CONFERENCE PRESENTATION JANUARY 2021 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM SAFE HARBOR Forward-Looking Statements This presentation includes "forward-looking" statements within the meaning of Section 27A of the Securities Act of 1933, Section 21E of the Securities Exchange Act of 1934, the Private Securities Litigation Reform Act of 1995 ...

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 For the quarterly period ended September 30, 2020 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 other ...

Great Lakes Dredge & Dock Corp (NASDAQ:GLDD) Q3 2020 Earnings Conference Call November 4, 2020 10:00 AM ET Company Participants Tina Baginskis - Director of Investor Relations Lasse Petterson - Chief Executive Officer and President Mark Marinko - Chief Financial Officer Conference Call Participants Jon Tanwanteng - CJS Securities DeForest Hinman - Walthausen & Company Poe Fratt - Noble Capital Max Batzer - Wynnefield Capital Operator Good morning, ladies and gentlemen, and welcome to the Q3 Great Lakes Dred ...

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 For the quarterly period ended June 30, 2020 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 other juri ...

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q2 2020 Earnings Conference Call August 4, 2020 10:00 AM ET Company Participants Tina Baginskis - Director-Investor Relations Lasse Petterson - Chief Executive Officer Mark Marinko - Chief Financial Officer Conference Call Participants Poe Fratt - Noble Financial Capital Markets DeForest Hinman - Walthausen & Co. Richard Glass - Glass Capital Jon Tanwanteng - CJS Securities Matt Baxter - Wynne Capital Operator Ladies and gentlemen thank you for standing by ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FORM 10-Q For the quarterly period ended March 31, 2020 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 other jur ...

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q1 2020 Earnings Conference Call May 5, 2020 10:00 AM ET Company Participants Tina Baginskis – Director-Investor Relations Lasse Petterson – Chief Executive Officer Mark Marinko – Chief Financial Officer Conference Call Participants Jon Tanwanteng – CJS Securities Poe Fratt – Noble Financial Capital Markets Greg Bennett – Morgan Stanley Richard Glass – Glass Capital Operator Good morning ladies and gentlemen and welcome to the Q1 2020 Great Lakes Dredge & ...