EXHIBIT 99.1 Great Lakes Reports First Quarter 2024 Results Management Commentary Lasse Petterson, President and Chief Executive Officer commented, "Great Lakes ended the first quarter with strong financial results, including net income of $21.0 million and adjusted EBITDA of $42.9 million, which is the best adjusted EBITDA quarter since the fourth quarter of 2021, supporting a return to normalcy. The majority of our dredges were actively engaged on projects and our new hopper dredge, the Galveston Island, ...

 First quarter net income of $21.0 millionFirst quarter adjusted EBITDA of $42.9 millionDredging backlog of $879.4 million at March 31, 2024 HOUSTON, May 07, 2024 (GLOBE NEWSWIRE) -- Great Lakes Dredge & Dock Corporation ("Great Lakes" or the "Company") (NASDAQ:GLDD), the largest provider of dredging services in the United States, today reported financial results for the first quarter ended March 31, 2024. First Quarter 2024 Highlights Revenue was $198.7 millionTotal operating profit was $31.5 millionNet i ...

HOUSTON, April 24, 2024 (GLOBE NEWSWIRE) -- Great Lakes Dredge & Dock Corporation ("Great Lakes" or the "Company") (NASDAQ:GLDD), the largest provider of dredging services in the United States, announced that it has entered into a $150,000,000 5-year, senior secured second-lien credit agreement ("Second Lien Credit Agreement") with Guggenheim Credit Funding, LLC, on behalf of one or more clients. The Company borrowed $100,000,000 under the Second Lien Credit Agreement on the Closing Date and has the option ...

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

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q4 2023 Earnings Call Transcript February 14, 2024 10:00 AM ET Company Participants Tina Baginskis - Director of IR Lasse Petterson - President and CEO Scott Kornblau - CFO Conference Call Participants Adam Thalhimer - Thompson Davis Joe Gomes - Noble Capital Jon Tanwanteng - CJS Securities Brian Russo - Sidoti Operator Good day, and thank you for standing by. Welcome to the Q4 2023 Great Lakes Dredge & Dock Corp. Earnings Conference Call. At this time, al ...

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q3 2023 Earnings Conference Call November 7, 2023 10:00 AM ET Company Participants Tina Baginskis - Director, IR Lasse Petterson - President and CEO Scott Kornblau - SVP and CFO Conference Call Participants Joe Gomes - NOBLE Capital Markets Adam Thalhimer - Thompson, Davis Jon Tanwanteng - CJS Securities William Hong - Reorg Research Jacob Christensen - Axebrook Capital Operator Good day and thank you for standing by. Welcome to the Q3 2023 Great Lakes Dre ...

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, 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 ...

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q2 2023 Results Conference Call August 1, 2023 10:00 AM ET Company Participants Tina Baginskis - Director of Investor Relations Lasse Petterson - President and Chief Executive Officer Scott Kornblau - Senior Vice President and Chief Financial Officer Conference Call Participants Adam Thalhimer - Thompson, Davis Joe Gomes - NOBLE Capital Pete Lukas - CJS Securities Operator Good day, and thank you for standing by. Welcome to the Second Quarter 2023 Great La ...

Washington, D.C. 20549 UNITED STATES SECURITIES AND EXCHANGE COMMISSION 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, 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 juri ...

Great Lakes Dredge & Dock Corporation (NASDAQ:GLDD) Q1 2023 Earnings Conference Call May 2, 2023 10:00 AM ET Company Participants Tina Baginskis - Director of Investor Relations Lasse Petterson - President and Chief Executive Officer Scott Kornblau - Senior Vice President and Chief Financial Officer Conference Call Participants Joe Gomes - Noble Capital Markets Adam Thalhimer - Thompson, Davis & Company, Inc. Jonathan Tanwanteng - CJS Securities, Inc. Operator Good day, and thank you for standing by. Welcom ...