0001042729 2026-09-28 2026-09-28 0001042729 1 2026-09-28 2026-09-28 0001042729 2 2026-09-28 2026-09-28 0001042729 3 2026-09-28 2026-09-28 0001042729 4 2026-09-28 2026-09-28 0001042729 5 2026-09-28 2026-09-28 0001042729 6 2026-09-28 2026-09-28 0001042729 7 2026-09-28 2026-09-28 0001042729 8 2026-09-28 2026-09-28 0001042729 9 2026-09-28 2026-09-28 iso4217:USD pure S-3 S-3ASR EX-FILING FEES 0001042729 MERCANTILE BANK CORP N/A N/A S-3 MERCANTILE BANK CORP false Equity Common Stock, no par value per share true 0.0001381 false Equity Preferred Stock, no par value per share true 0.0001381 false Debt Debt Securities true 0.0001381 false Other Depository Shares true 0.0001381 false Other Stock Purchase Contracts true 0.0001381 false Other Stock Purchase Units true 0.0001381 false Other Subscription Rights true 0.0001381 false Other Warrants true 0.0001381 false Other Units true 0.0001381 0.00 0.00 0.00 0.00 0.00 (1) Separate consideration may or may not be received for securities that are issuable upon exercise, conversion or exchange of other securities. (2) The registrant is relying on Rule 456(b) and Rule 457(r) under the Securities Act of 1933, as amended, to defer payment of all of the registration fee. (3) An unspecified aggregate initial offering price or number of the securities of each identified class is being registered as may from time to time be offered at unspecified prices. (1) Separate consideration may or may not be received for securities that are issuable upon exercise, conversion or exchange of other securities. (2) The registrant is relying on Rule 456(b) and Rule 457(r) under the Securities Act of 1933, as amended, to defer payment of all of the registration fee. (3) An unspecified aggregate initial offering price or number of the securities of each identified class is being registered as may from time to time be offered at unspecified prices. (1) Separate consideration may or may not be received for securities that are issuable upon exercise, conversion or exchange of other securities. (2) The registrant is relying on Rule 456(b) and Rule 457(r) under the Securities Act of 1933, as amended, to defer payment of all of the registration fee. (3) An unspecified aggregate initial offering price or number of the securities of each identified class is being registered as may from time to time be offered at unspecified prices. (1) Separate consideration may or may not be received for securities that are issuable upon exercise, conversion or exchange of other securities. (2) The registrant is relying on Rule 456(b) and Rule 457(r) under the Securities Act of 1933, as amended, to defer payment of all of the registration fee. (3) An unspecified aggregate initial offering price or number of the securities of each identified class is being registered as may from time to time be offered at unspecified prices. (1) Separate consideration may or may not be received for securities that are issuable upon exercise, conversion or exchange of other securities. (2) The registrant is relying on Rule 456(b) and Rule 457(r) under the Securities Act of 1933, as amended, to defer payment of all of the registration fee. (3) An unspecified aggregate initial offering price or number of the securities of each identified class is being registered as may from time to time be offered at unspecified prices. (1) Separate consideration may or may not be received for securities that are issuable upon exercise, conversion or exchange of other securities. (2) The registrant is relying on Rule 456(b) and Rule 457(r) under the Securities Act of 1933, as amended, to defer payment of all of the registration fee. (3) An unspecified aggregate initial offering price or number of the securities of each identified class is being registered as may from time to time be offered at unspecified prices. (1) Separate consideration may or may not be received for securities that are issuable upon exercise, conversion or exchange of other securities. (2) The registrant is relying on Rule 456(b) and Rule 457(r) under the Securities Act of 1933, as amended, to defer payment of all of the registration fee. (3) An unspecified aggregate initial offering price or number of the securities of each identified class is being registered as may from time to time be offered at unspecified prices. (1) Separate consideration may or may not be received for securities that are issuable upon exercise, conversion or exchange of other securities. (2) The registrant is relying on Rule 456(b) and Rule 457(r) under the Securities Act of 1933, as amended, to defer payment of all of the registration fee. (3) An unspecified aggregate initial offering price or number of the securities of each identified class is being registered as may from time to time be offered at unspecified prices. (1) Separate consideration may or may not be received for securities that are issuable upon exercise, conversion or exchange of other securities. (2) The registrant is relying on Rule 456(b) and Rule 457(r) under the Securities Act of 1933, as amended, to defer payment of all of the registration fee. (3) An unspecified aggregate initial offering price or number of the securities of each identified class is being registered as may from time to time be offered at unspecified prices.