<SEC-DOCUMENT>0001104659-20-112666.txt : 20201006
<SEC-HEADER>0001104659-20-112666.hdr.sgml : 20201006
<ACCEPTANCE-DATETIME>20201006163444
ACCESSION NUMBER:		0001104659-20-112666
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20201005
FILED AS OF DATE:		20201006
DATE AS OF CHANGE:		20201006

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hughes Brian F.
		CENTRAL INDEX KEY:			0001825326

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39548
		FILM NUMBER:		201227112

	MAIL ADDRESS:	
		STREET 1:		124 COLONIAL RIDGE DRIVE
		CITY:			HADDONFIELD
		STATE:			NJ
		ZIP:			08033

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BENTLEY SYSTEMS INC
		CENTRAL INDEX KEY:			0001031308
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				953936623
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		690 PENNSYLVANIA DR
		CITY:			EXTON
		STATE:			PA
		ZIP:			19341
</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>2020-10-05</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001031308</issuerCik>
        <issuerName>BENTLEY SYSTEMS INC</issuerName>
        <issuerTradingSymbol>BSY</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001825326</rptOwnerCik>
            <rptOwnerName>Hughes Brian F.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O BENTLEY SYSTEMS, INCORPORATED</rptOwnerStreet1>
            <rptOwnerStreet2>685 STOCKTON DRIVE</rptOwnerStreet2>
            <rptOwnerCity>EXTON</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19341</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class B Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-10-05</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1136</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>22.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>19585</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents director compensation that Mr. Hughes has elected to receive in lieu of cash in the form of restricted stock that vests in two quarterly installments beginning on December 31, 2020.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Michael T. Fischette, Attorney-in-Fact</signatureName>
        <signatureDate>2020-10-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
