Federal Signal Reports First Quarter Results Including 35% Net Sales Growth, 52% Operating Income Improvement, and Strong Cash Generation; Raises Full-Year Outlook and Increases EBITDA Margin Targets for Safety and Security Systems Group

DOWNERS GROVE, Ill., April 29, 2026 /PRNewswire/ -- Federal Signal Corporation (NYSE:FSS) (the "Company"), a leader in environmental and safety solutions, today reported financial results for the first quarter ended March 31, 2026.