GLDD Great Lakes Dredge and Dock Corporation

Great Lakes Dredge & Dock Corporation (NASDAQ: GLDD) today announced that it will release the financial results for its three months ended March 31, 2024 on Tuesday, May 7, 2024 at 7:00 a.m. C.D.T. A conference call with the Company will be held the same day at 9:00 a.m. C.D.T.

Investors and analysts are encouraged to pre-register for the conference call by using the link below. Participants who pre-register will be given a unique PIN to gain immediate access to the call. Pre-registration may be completed at any time up to the call start time.

To pre-register, go to https://register.vevent.com/register/BId503a795e3a349eebb1ee1d193639e14

The live call and replay can also be heard at https://edge.media-server.com/mmc/p/wkfzmfb4 or on the Company’s website, www.gldd.com, under Events on the Investor Relations page. A copy of the press release will be available on the Company’s website.

The Company Great Lakes Dredge & Dock Corporation (“Great Lakes” or the “Company”) is the largest provider of dredging services in the United States. In addition, Great Lakes is fully engaged in expanding its core business into the rapidly developing offshore wind energy industry. The Company has a long history of performing significant international projects. The Company employs experienced civil, ocean and mechanical engineering staff in its estimating, production and project management functions. In its over 134-year history, the Company has never failed to complete a marine project. Great Lakes owns and operates the largest and most diverse fleet in the U.S. dredging industry, comprised of approximately 200 specialized vessels. Great Lakes has a disciplined training program for engineers that ensures experienced-based performance as they advance through Company operations. The Company’s Incident-and Injury-Free® (IIF®) safety management program is integrated into all aspects of the Company’s culture. The Company’s commitment to the IIF® culture promotes a work environment where employee safety is paramount.

For further information contact: Tina BaginskisDirector, Investor Relations630-574-3024