Form 4 Filing for Richard D. MacDonald

This Form 4 filing details a transaction by Richard D. MacDonald, a director at MERCANTILE BANK CORP (MBWM). On May 22, 2026, MacDonald acquired 715 shares of Common Stock. The transaction was marked with code "A" for acquisition, and the price per share was $0.00. Following this transaction, MacDonald directly owns 3,289 shares of the company's common stock. The filing was signed by Adin J. Tarr as Attorney-in-Fact on May 27, 2026. MacDonald is identified as a director, not an officer or 10% owner.