Great Lakes Dredge & Dock Corporation Schedules Announcement of 2023 Fourth Quarter Results

Great Lakes Dredge & Dock Corporation (NASDAQ: GLDD) today announced that it will release the financial results for its three and twelve months ended December 31, 2023 on Wednesday, February 14, 2024 at 7:00 a.m. C.S.T. A conference call with the Company will be held the same day at 9:00 a.m. C.S.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/BIc85228ed2c3145ec8bfcb3f185c726f2

The live call and replay can also be heard at https://edge.media-server.com/mmc/p/2z7j3yx5 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