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, 2023 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 ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K For the fiscal year ended December 31, 2022 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 (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 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 2022 Earnings Conference Call February 15, 2023 10:00 AM ET Company Participants Tina Baginskis - Director, IR Lasse Petterson - President and CEO Scott Kornblau - CFO Conference Call Participants Adam Thalhimer - Thompson Davis Jon Tanwanteng - CJS Securities Joe Gomez - Noble Capital Operator Good day, and thank you for standing by. Welcome to the Fourth Quarter 2022 Great Lakes Dregde & Dock Corporation Conference Call. At this time all participants ...

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, 2022 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 Corporation (NASDAQ:GLDD) Q3 2022 Earnings Conference Call November 1, 2022 10:00 AM ET Company Representatives Lasse Petterson - President, Chief Executive Officer Scott Kornblau - Chief Financial Officer Tina Baginskis - Director, Investor Relations Conference Call Participants Joe Gomes - Noble Capital Adam Thalhimer - Thompson Davis Jon Tanwanteng - CJS Securities Andrew Casella - Deutsche Bank Stephen Hansel - Eclectic Investment Partners Operator Good day, and thank you for s ...

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q2 2022 Earnings Conference Call August 2, 2022 10:00 AM ET Company Participants Tina Baginskis - Director, IR and Financial Planning Lasse Petterson - President and CEO Scott Kornblau - CFO Conference Call Participants Joe Gomes - Noble Capital Adam Thalhimer - Thompson Davis Jon Tanwanteng - CJS Securities Poe Fratt - Alliance Operator Good day, and thank you for standing by. Welcome to the Q2 2022 Great Lakes Dregde & Dock Corporation Earnings Conferenc ...

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, 2022 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 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 ...