EXHIBIT 99.1 ORION GROUP HOLDINGS REPORTS FOURTH QUARTER AND FULL YEAR 2023 RESULTS HOUSTON – February 28, 2024 – Orion Group Holdings, Inc. (NYSE: ORN) (the “Company”), a leading specialty construction company, today reported its financial results for the fourth quarter and full year ended December 31, 2023. Highlights for the quarter ended December 31, 2023: ● Contract revenues of $201.6 million ● GAAP net loss was$4.4 million or $0.13 per diluted share ● Adjusted net income was$2.6 million or $0.08 per ...