<SEC-DOCUMENT>0001104659-20-068076.txt : 20200601
<SEC-HEADER>0001104659-20-068076.hdr.sgml : 20200601
<ACCEPTANCE-DATETIME>20200601095518
ACCESSION NUMBER:		0001104659-20-068076
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:			Mathews Michael S
		CENTRAL INDEX KEY:			0001574656

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39036
		FILM NUMBER:		20931441

	MAIL ADDRESS:	
		STREET 1:		3680 VICTORIA STREET NORTH
		CITY:			SHOREVIEW
		STATE:			MN
		ZIP:			55126

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>0001574656</rptOwnerCik>
            <rptOwnerName>Mathews Michael S</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>2114</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5170</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </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>
    </footnotes>

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