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MERCANTILE BANK CORP

For the period ended Sep 30, 2026. Filed Oct 30, 2026.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2026 · Filed Oct 30, 2026

MBWM$61.63+1.8%Stored close · as of Nov 9, 2026

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Item 4. Controls and Procedures

As of September 30, 2026, an evaluation was performed under the supervision of and with the participation of our management, including our Chief Executive Officer (our principal executive officer) and Chief Financial Officer (our principal financial officer), of the effectiveness of the design and operation of our disclosure controls and procedures. Based on that evaluation, our management, including our Chief Executive Officer and Chief Financial Officer, concluded that our disclosure controls and procedures were effective as of September 30, 2026.

There have been no changes in our internal control over financial reporting during the quarter ended September 30, 2026, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.