GREAT LAKES DREDGE & DOCK CORPORATION INVESTOR PRESENTATION MARCH 2022 Dredging Worldwide Since 1890. 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 or in releases made by the SEC, all as may be amended f ...

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 ...