EXHIBIT 99.1 ORION GROUP HOLDINGS REPORTS FIRST QUARTER 2024 RESULTS HOUSTON – April 24, 2024 – Orion Group Holdings, Inc. (NYSE: ORN) (the “Company”), a leading specialty construction company, today reported its financial results for the first quarter ended March 31, 2024. Highlights for the quarter ended March 31, 2024: ● Contract revenues of $160.7 million ● GAAP net loss was$6.1 million or $0.19 per diluted share ● Adjusted net loss was$4.0 million or $0.12 per diluted share ● Adjusted EBITDA was$4.1 ...