Exhibit 99.1 DOUGLAS DYNAMICS REPORTS FIRST QUARTER 2025 RESULTS Record Results at Work Truck Solutions; Positive Impact of Winter Weather at Work Truck Attachments First Quarter 2025 Highlights*: "With a rich history, deep industry experience, and a focus on continuous improvement, our brands continue to get stronger as we look to the future," explained Mark Van Genderen, President, and CEO. "This was an excellent quarter for our company across the board, with both segments executing successfully and deliv ...