MERCANTILE BANK CORP 8-K/A

What Happened MERCANTILE BANK CORP (MBWM) filed a Form 8-K on January 20, 2026 (Item 7.01) furnishing a "Conference Call & Webcast Presentation" that management will use during its previously announced Fourth Quarter 2025 conference call on Tuesday, January 20, 2026 at 10:00 AM Eastern Time. The presentation (Exhibit 99.1) may be used, possibly with revisions, in future presentations to investors, analysts, lenders, partners and others and is posted on the company’s investor website.

Key Details

• Filing date: January 20, 2026; Conference call: January 20, 2026 at 10:00 AM ET.
• Exhibit 99.1: "Mercantile Bank Corporation Conference Call & Webcast Presentation" dated January 20, 2026 (as revised).
• Presentation available at http://ir.mercbank.com.
• Disclosure made under Regulation FD; per Form 8-K instruction, the furnished materials are not deemed "filed" for purposes of Section 18 of the Exchange Act.

Why It Matters This filing provides the slide materials management will use to discuss Q4 2025 results and the company’s operations—useful for investors planning to listen to the earnings call or review the presentation afterward. The Regulation FD notice confirms the company is distributing the information publicly, and the Form 8-K clarifies the exhibit is furnished (not formally "filed"), which affects legal filing status but not the availability of the information to investors.