<SEC-DOCUMENT>0001104659-20-068071.txt : 20200601
<SEC-HEADER>0001104659-20-068071.hdr.sgml : 20200601
<ACCEPTANCE-DATETIME>20200601095347
ACCESSION NUMBER:		0001104659-20-068071
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200528
FILED AS OF DATE:		20200601
DATE AS OF CHANGE:		20200601

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lemke Kevin D
		CENTRAL INDEX KEY:			0001786856

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39036
		FILM NUMBER:		20931420

	MAIL ADDRESS:	
		STREET 1:		401 DEMERS AVENUE
		CITY:			GRAND FORKS
		STATE:			ND
		ZIP:			58201

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALERUS FINANCIAL CORP
		CENTRAL INDEX KEY:			0000903419
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				450375407
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		401 DEMERS AVE
		CITY:			GRAND FORKS
		STATE:			ND
		ZIP:			58201
		BUSINESS PHONE:		7017953200

	MAIL ADDRESS:	
		STREET 1:		PO BOX 6001
		STREET 2:		401 DEMERS AVE
		CITY:			GRAND FORKS
		STATE:			ND
		ZIP:			58206-6001

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRST NATIONAL CORP NORTH DAKOTA
		DATE OF NAME CHANGE:	19980312
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-05-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000903419</issuerCik>
        <issuerName>ALERUS FINANCIAL CORP</issuerName>
        <issuerTradingSymbol>ALRS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001786856</rptOwnerCik>
            <rptOwnerName>Lemke Kevin D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>401 DEMERS AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>GRAND FORKS</rptOwnerCity>
            <rptOwnerState>ND</rptOwnerState>
            <rptOwnerZipCode>58201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-05-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2144</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>77773</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>19000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trust</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">All 2,114 shares were acquired pursuant to an annual director award issued under the Alerus Financial Corporation 2019 Equity Incentive Plan.</footnote>
        <footnote id="F2">19,000 shares of common stock are held by Mr. Lemke as trustee of the Doreen D. Lemke Testamentary Family Trust. Mr. Lemke possesses sole voting and investment power with respect to these shares.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Scott Fenske, by power of attorney</signatureName>
        <signatureDate>2020-06-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
