Exhibit 99.1 For Immediate Release March 22, 2024 Star Equity Holdings, Inc. Announces 2023 Fourth Quarter and Full Year Financial Results Ended 2023 with cash and cash equivalents of $18.9 million Generated positive cash flow from operations of$2.7 million in 2023 Old Greenwich, CT. - Star Equity Holdings, Inc. (Nasdaq: STRR; STRRP) (“Star Equity” or the “Company”), a diversified holding company, reported today its financial results for the fourth quarter (Q4) and fiscal year (FY) ended December 31, 2023. ...