Insider Transaction: Hugues Velez Margarita Acquires BYLINE BANCORP, INC. Stock

Hugues Velez Margarita, a director at BYLINE BANCORP, INC., acquired 1533 restricted shares of Common Stock on June 8, 2026. These shares will vest on June 1, 2027, subject to continued service, and were received through the Company's Director Compensation Program. The transaction code "A" indicates an acquisition. The acquisition price was $0.0 per share. Following this transaction, Mr. Margarita now holds 8722 shares. The filing was signed by Thomas J. Bell III, as Attorney-in-Fact, on June 10, 2026.