MERCANTILE BANK CORP

Mercantile Bank Corporation is a registered bank holding company under the Bank Holding Company Act of 1956, as amended (the Bank Holding Company Act ). Unless the text clearly suggests otherwise, references to us, we, our, or the company include Mercantile Bank Corporation and its wholly owned subsidiaries. As a bank holding company, we are subject to regulation by the Board of Governors of the Federal Reserve System (the Federal Reserve Board ). We were organized on July 15, 1997, under the laws of the State of Michigan, primarily for the purpose of holding all of the stock of Mercantile Bank, and of such other subsidiaries as we may acquire or establish. Mercantile Bank commenced business on December 15, 1997. During the third quarter of 2013, we filed an election to become a financial holding company, which election became effective April 14, 2014. Mercantile Insurance Center, Inc. ( our insurance company ), a subsidiary of Mercantile Bank, commenced operations during 2002 to offer insurance products. Mercantile Community Partners ("MCP"), our subsidiary, began operations during 2023 to invest in community development tax credit investments. On July 22, 2025, we entered into a merger agreement with Eastern Michigan Financial Corporation, the bank holding company for Eastern Michigan Bank. Eastern Michigan Financial Corporation shareholders had the right to receive 0.7116 shares of Mercantile Bank Corporation stock and $32.32 in exchange for each share of Eastern Michigan Financial Corporation stock they owned.