<SEC-DOCUMENT>0001415889-16-006055.txt : 20160601
<SEC-HEADER>0001415889-16-006055.hdr.sgml : 20160601
<ACCEPTANCE-DATETIME>20160601172732
ACCESSION NUMBER:		0001415889-16-006055
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20160526
FILED AS OF DATE:		20160601
DATE AS OF CHANGE:		20160601

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MERCANTILE BANK CORP
		CENTRAL INDEX KEY:			0001042729
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				383360865
		STATE OF INCORPORATION:			MI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		310 LEONARD STREET NW
		CITY:			GRAND RAPIDS
		STATE:			MI
		ZIP:			49504
		BUSINESS PHONE:		616 406-3000

	MAIL ADDRESS:	
		STREET 1:		310 LEONARD STREET NW
		CITY:			GRAND RAPIDS
		STATE:			MI
		ZIP:			49504

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Worthington Robert T.
		CENTRAL INDEX KEY:			0001675913

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-26719
		FILM NUMBER:		161690221

	MAIL ADDRESS:	
		STREET 1:		310 LEONARD ST NW
		CITY:			GRAND RAPIDS
		STATE:			MI
		ZIP:			49504
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>form3-06012016_020620.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2016-05-26</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001042729</issuerCik>
        <issuerName>MERCANTILE BANK CORP</issuerName>
        <issuerTradingSymbol>MBWM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001675913</rptOwnerCik>
            <rptOwnerName>Worthington Robert T.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MERCANTILE BANK CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>310 LEONARD ST.</rptOwnerStreet2>
            <rptOwnerCity>GRAND RAPIDS</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>49504</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>SENIOR V.P., GENERAL COUNSEL</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14327.996</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>In 401(k) plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ Bradley J. Wyatt, Attorney-in-Fact</signatureName>
        <signatureDate>2016-06-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ex24-06012016_020620.htm
<TEXT>
<!DOCTYPE html PUBLIC "-//IETF//DTD HTML//EN">
<html><head><title>ex24-06012016_020620.htm</title><meta name="author" content="WyattBJ"><meta name="date" content="06/01/2016"></head><body style="margin-top:0;font-family:Times New Roman; font-size:10pt; color:#000000">
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<p style="margin:0px; font-family:Arial,Times New Roman; font-size:11pt" align="center"><b>POWER OF ATTORNEY</b></p>
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<p style="margin:0px; text-indent:48px; font-family:Arial,Times New Roman; font-size:11pt">Know all by these presents that the undersigned hereby constitutes and appoints each of Bradley J. Wyatt, Cynthia A. Moore, and Zane S. Hatahet, signing singly, the undersigned&#146;s true and lawful attorney-in-fact to:</p>
<p style="margin:0px"><br></p>
<p style="margin-top:0px; margin-bottom:-2px; text-indent:48px; width:96px; font-family:Arial,Times New Roman; font-size:11pt; float:left">(1)</p>
<p style="margin:0px; padding-left:96px; text-indent:-2px; font-family:Arial,Times New Roman; font-size:11pt">execute for and on behalf of the undersigned, in the undersigned&#146;s capacity as an officer and/or director of Mercantile Bank Corporation (the &#147;Company&#148;), Forms 3, 4, and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder; and Form ID, adopted by the Securities and Exchange Commission.</p>
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<p style="margin-top:0px; margin-bottom:-2px; text-indent:48px; width:96px; font-family:Arial,Times New Roman; font-size:11pt; float:left">(2)</p>
<p style="margin:0px; padding-left:96px; text-indent:-2px; font-family:Arial,Times New Roman; font-size:11pt">do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4, or 5, or Form ID, and timely file such form with the United States Securities and Exchange Commission and any stock exchange, stock market or similar authority; and</p>
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<p style="margin-top:0px; margin-bottom:-2px; text-indent:48px; width:96px; font-family:Arial,Times New Roman; font-size:11pt; float:left">(3)</p>
<p style="margin:0px; padding-left:96px; text-indent:-2px; font-family:Arial,Times New Roman; font-size:11pt">take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact&#146;s discretion.</p>
<p style="margin:0px; clear:left"><br></p>
<p style="margin:0px; text-indent:48px; font-family:Arial,Times New Roman; font-size:11pt">The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact&#146;s substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. &nbsp;The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned&#146;s responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.</p>
<p style="margin:0px"><br></p>
<p style="margin:0px; text-indent:48px; font-family:Arial,Times New Roman; font-size:11pt">This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and 5 with respect to the undersigned&#146;s holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.</p>
<p style="margin:0px"><br></p>
<p style="margin:0px; text-indent:48px; font-family:Arial,Times New Roman; font-size:11pt">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 1<sup>st</sup> day of June, 2016.</p>
<p style="margin:0px"><br></p>
<p style="margin:0px; text-indent:240px; font-family:Arial,Times New Roman; font-size:11pt"><u>/s/ Robert T. Worthington</u></p>
<div style="display:inline;"></div><p style="margin:0px; text-indent:240px; font-family:Arial,Times New Roman; font-size:11pt">Signature</p>
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<p style="margin:0px; font-family:Arial,Times New Roman; font-size:11pt">STATE OF MICHIGAN</p>
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<p style="margin:0px; font-family:Arial,Times New Roman; font-size:11pt" align="justify">COUNTY OF KENT</p>
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<p style="margin:0px; font-family:Arial,Times New Roman; font-size:11pt" align="justify">On this 1<sup>st</sup> day of June, 2016, Robert T. Worthington personally appeared before me, and acknowledged that he or she executed the foregoing instrument for the purposes therein contained.</p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px; text-indent:48px; font-family:Arial,Times New Roman; font-size:11pt" align="justify">IN WITNESS WHEREOF, I have hereunto set my hand and official seal.</p>
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<p style="margin:0px; font-family:Arial,Times New Roman; font-size:11pt" align="justify"><u>/s/ Amy W. M. Kam</u></p>
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<p style="margin:0px; font-family:Arial,Times New Roman; font-size:11pt" align="justify">Notary Public</p>
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<p style="margin:0px; font-family:Arial,Times New Roman; font-size:11pt" align="justify">AMY W. M. KAM</p>
<p style="margin:0px; font-family:Arial,Times New Roman; font-size:11pt" align="justify">Notary Public, Kent County, MI</p>
<p style="margin:0px; font-family:Arial,Times New Roman; font-size:11pt" align="justify">My Commission Expires 2/26/2018</p>
<p style="margin:0px; font-family:Arial,Times New Roman; font-size:11pt" align="justify">Acting in the County of Kent</p>
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<p style="margin:0px; font-family:Arial,Times New Roman; font-size:11pt" align="justify">/SEAL/ </p>
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<p style="margin:0px; font-family:Arial,Times New Roman; font-size:12pt" align="center">2</p>
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</body></html>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
