Mercantile Bank Corporation – Material Contracts Watch

from 8-K 6 pages Certain Information Identified by “[***]” Has Been Excluded From the Exhibit Because It Is Both Not Material and Is the Type of Information That the Registrant Treats as Private or Confidential. Mercantile Bank Corporation/Mercantile Bank 2026 Mercantile Executive Officer Bonus Plan

from 10-K 1 page Director Fee Summary

from 8-K 5 pages Form Voting Agreement

from S-8 4 pages Mercantile Bank Corporation Employee Stock Purchase Plan of 2025 Section 1 Purpose of Plan

from 8-K 6 pages Mercantile Bank Corporation/Mercantile Bank 2025 Mercantile Executive Officer Bonus Plan

from 10-K 1 page Director Fee Summary

from 8-K 7 pages Mercantile Bank Corporation Stock Incentive Plan of 2023 Restricted Stock Award Agreement Notification of Award and Terms and Conditions of Award

from 8-K 10 pages Mercantile Bank Corporation Stock Incentive Plan of 2023 Performance-Based Restricted Stock Award Agreement Notification of Award and Terms and Conditions of Award

from 8-K 10 pages Amended and Restated Employment Agreement

from 8-K 10 pages Amended and Restated Employment Agreement

from 8-K 6 pages Amended and Restated Employment Agreement

from 8-K 10 pages Amended and Restated Employment Agreement

from 8-K 3 pages Rabbi Directed Trust Agreement

from 8-K 2 pages Second Amendment to the Mercantile Bank Amended and Restated Deferred Compensation Plan

from 8-K 12 pages The Nonqualified Deferred Compensation Plan Adoption Agreement

from 8-K 6 pages Mercantile Bank Corporation/Mercantile Bank 2024 Mercantile Executive Officer Bonus Plan

from 8-K 1 page This Letter Confirms Our Agreement Regarding the Employment Agreement Dated as of November 30, 2023, Effective as of January 1, 2024 (The "Employment Agreement"), by and Between Me, Mercantile Bank (The “Bank”) and Mercantile Bank Corporation (The “Company”). We Have Agreed That All References in the Employment Agreement to My Title as Executive Vice President, Chief Operating Officer of the Bank, Are Amended to Refer to Executive Vice President, Chief Operating Officer and Secretary of the Company and Executive Vice President, Chief Operating Officer of the Bank, to Take Into Account My Change in Title Effective January 1, 2024. Except as Specifically Amended by This Letter, All of the Terms of the Employment Agreement Remain in Full Force and Effect. This Letter May Be Executed in Counterparts, and Is Governed by Michigan Law. /S/ Scott P. Setlock Scott P. Setlock Mercantile Bank By: /S/ Robert B. Kaminski, Jr. Its: Chief Executive Officer Mercantile Bank Corporation By: /S/ Robert B. Kaminski, Jr. Its: President and Chief Executive Officer

from 8-K 17 pages Employment Agreement

from 8-K 1 page This Letter Confirms Our Agreement Regarding the Employment Agreement Dated as of November 29, 2018, Effective as of December 31, 2018 (The "Employment Agreement"), by and Between Me, Mercantile Bank (The “Bank”) and Mercantile Bank Corporation (The “Company”). We Have Agreed That All References in the Employment Agreement to My Title as Executive Vice President of the Company and President of the Bank, Are Amended to Refer to President and Chief Executive Officer of Each of the Company and the Bank, to Take Into Account My Change in Title Effective June 1, 2024. Except as Specifically Amended by This Letter, All of the Terms of the Employment Agreement Remain in Full Force and Effect. This Letter May Be Executed in Counterparts, and Is Governed by Michigan Law. /S/ Raymond E. Reitsma Raymond E. Reitsma Mercantile Bank By: /S/ Robert B. Kaminski, Jr. Its: Chief Executive Officer Mercantile Bank Corporation By: /S/ Robert B. Kaminski, Jr. Its: President and Chief Executive Officer

from 10-K 1 page Director Fee Summary