EXHIBIT 99.1 [MERCANTILE(R) BANK CORPORATION LOGO] FOR FURTHER INFORMATION: AT MERCANTILE BANK CORPORATION: Gerald R. Johnson, Jr. Charles Christmas Chairman & CEO Chief Financial Officer 616-726-1200 616-726-1202 gjohnson@mercbank.com cchristmas@mercbank.com MERCANTILE BANK CORPORATION ANNOUNCES FIVE PERCENT STOCK DIVIDEND Grand Rapids, MICH., July 7, 2005 -- At a meeting held July 6, 2005, the board of directors of Mercantile Bank Corporation (Nasdaq: MBWM) declared a five percent stock dividend payable on August 1, 2005 to shareholders of record as of the close of business on July 18, 2005. The stock dividend will increase shares outstanding to approximately 7,582,389. Gerald R. Johnson, Mercantile's Chairman and CEO, stated, "We are pleased to reward shareholders with our fifth annual five percent stock dividend, in addition to our regular quarterly cash dividend. The stock dividend reflects our continued commitment to maximize the value of our shareholders' investment in Mercantile through improved stock liquidity, while not placing capital constraints on our ability to grow." About Mercantile Bank Corporation Mercantile Bank Corporation is the bank holding company for Mercantile Bank of West Michigan. The Bank's primary service area is the Kent and Ottawa County area of West Michigan, which includes the City of Grand Rapids, the second-largest city in the State of Michigan. The Bank provides a wide variety of commercial banking services primarily to businesses, individuals, and governmental units through its five full-service offices in greater Grand Rapids and its Holland, Michigan office located thirty miles southwest of Grand Rapids. Mercantile Bank recently announced plans to open full-service branches in Lansing and Ann Arbor, Michigan. Mercantile Bank Corporation's common stock is listed on the Nasdaq National Market under the symbol "MBWM." Forward-Looking Statements This news release contains comments or information that constitute forward-looking statements (within the meaning of the Private Securities Litigation Reform Act of 1995) that are based on current expectations that involve a number of risks and uncertainties. Actual results may differ materially from the results expressed in forward-looking statements. Factors that might cause such a difference include changes in interest rates and interest rate relationships; demand for products and services; the degree of competition by traditional and non-traditional competitors; changes in banking regulation; changes in tax laws; changes in prices, levies, and assessments; the impact of technological advances; governmental and regulatory policy changes; the outcomes of contingencies; trends in customer behavior as well as their ability to repay loans; changes in the national and local economy; and other factors, including risk factors, referred to from time to time in filings made by Mercantile with the Securities and Exchange Commission. Mercantile undertakes no obligation to update or clarify forward-looking statements, whether as a result of new information, future events or otherwise. THREE MONTHS ENDED THREE MONTHS ENDED SIX MONTHS ENDED SIX MONTHS ENDED June 30, 2005 June 30, 2004 June 30, 2005 June 30, 2004 ------------------ ------------------ ---------------- ---------------- (Unaudited) (Unaudited) (Unaudited) (Unaudited) EARNINGS PER SHARE 1) BEFORE 5% STOCK DIVIDEND Net income $4,690,000 $3,146,000 $9,052,000 $6,119,000 Basic income per share $ 0.65 $ 0.44 $ 1.26 $ 0.85 Diluted income per share $ 0.64 $ 0.43 $ 1.23 $ 0.84 Average shares outstanding 7,218,512 7,172,633 7,212,451 7,165,744 Average diluted shares outstanding 7,353,163 7,322,474 7,368,687 7,310,298 2) AFTER 5% STOCK DIVIDEND Net income $4,690,000 $3,146,000 $9,052,000 $6,119,000 Basic income per share $ 0.62 $ 0.42 $ 1.20 $ 0.81 Diluted income per share $ 0.61 $ 0.41 $ 1.17 $ 0.80 Average shares outstanding 7,579,437 7,531,264 7,573,073 7,524,031 Average diluted shares outstanding 7,720,821 7,688,597 7,737,121 7,675,812