Form 4 Filing for Katrina L. Helmkamp

This filing details a Form 4 submission by Katrina L. Helmkamp, a director at FEDERAL SIGNAL CORP /DE/. On April 21, 2026, Ms. Helmkamp acquired 1,277 shares of Common Stock. The transaction code indicates an acquisition, and the price per share was $0.00. Following this transaction, Ms. Helmkamp directly owns 5,603 shares of the company's common stock. The filing was signed by Diane I. Bonina, acting as attorney-in-fact for Ms. Helmkamp, on April 23, 2026.