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, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION 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 2022 Earnings Conference Call May 3, 2022 10:00 AM ET Company Participants Tina Baginskis - Director, IR Lasse Petterson - President and CEO Scott Kornblau - CFO Conference Call Participants Joshua Zoepfel - Noble Capital Markets Jon Tanwanteng - CJS Securities Adam Thalhimer - Thomson Davis DeForest Hinman - Walthausen & Company Operator Good day and thank you for standing by. Welcome to the First Quarter of 2022 for Great Lakes Dredge & Dock Corporati ...

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, 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) (State or other jurisdiction of i ...

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q4 2021 Earnings Conference Call February 16, 2022 10:00 AM ET Company Participants Tina Baginskis - Director of Investor Relations Lasse Petterson - President & Chief Executive Officer Scott Kornblau - Chief Financial Officer Conference Call Participants Pete Lucas - CJS Securities Adam Thalhimer - Thompson Davis DeForest Hinman - Walthausen & Company Poe Fratt - Noble Capital Markets Operator Good day and thank you for standing by. Welcome to the Great L ...

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q3 2021 Results Conference Call November 2, 2021 10:00 AM ET Company Participants Tina Baginskis - Director of Investor Relations Lasse Petterson - President and Chief Executive Officer Scott Kornblau - Chief Financial Officer Conference Call Participants Adam Thalhimer - Thompson Davis & Co. Jon Tanwanteng - CJS Securities DeForest Hinman - Walthausen & Co Poe Fratt - Noble Financial Capital Markets Operator Good day everyone and thank you for standing by ...

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, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Delaware 20-5336063 (State or other jurisdiction of incorporation or organization) 9811 Katy Freeway, Suite 1200, Houston, TX 77024 (Address of principal executiv ...

Washington, D.C. 20549 FORM 10-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 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 juri ...

Great Lakes Dredge & Dock Corp (NASDAQ:GLDD) Q2 2021 Earnings Conference Call August 3, 2021 10:00 AM ET Company Participants Tina Baginskis - Director, IR Lasse Petterson - CEO, President & Director Mark Marinko - SVP & CFO Conference Call Participants Adam Thalhimer - Thompson Davis Jonathan Tanwanteng - CJS Securities DeForest Hinman - Walthausen & Co. Poe Fratt - Noble Capital Markets Operator Ladies and gentlemen, thank you for standing by, and welcome to the Great Lakes Second Quarter Earnings Call. A ...

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q1 2021 Earnings Conference Call May 4, 2021 10:00 AM ET Company Participants Tina Baginskis – Director of Investor Relations Lasse Petterson – President and Chief Executive Officer Mark Marinko – Chief Financial Officer Conference Call Participants Jon Tanwanteng – CJS Securities Poe Fratt – Noble Capital Markets DeForest Hinman – Walthausen Operator Ladies and gentlemen, thank you for standing by, and welcome to the Q1 2021 Great Lakes Dredge & Dock Corp ...

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 ...