Exhibit 99.1 NEWS RELEASE For Immediate Release: May 6, 2024 Sterling Reports Record First Quarter 2024 Results THE WOODLANDS, TX – May 6, 2024 – Sterling Infrastructure, Inc. (NasdaqGS: STRL) (“Sterling” or the “Company”) today announced financial results for the first quarter 2024. The financial comparisons herein are to the prior year quarter, unless otherwise noted. First Quarter 2024 Results • Revenues of $440.4 million, an increase of 9% • Gross margin of 17.5%, an increase from 15.3% • Net Income of ...