<SEC-DOCUMENT>0000899243-21-027790.txt : 20210707
<SEC-HEADER>0000899243-21-027790.hdr.sgml : 20210707
<ACCEPTANCE-DATETIME>20210707163036
ACCESSION NUMBER:		0000899243-21-027790
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210706
FILED AS OF DATE:		20210707
DATE AS OF CHANGE:		20210707

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SIEMENS AG
		CENTRAL INDEX KEY:			0000940418
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 8880 [8880]

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39548
		FILM NUMBER:		211077751

	BUSINESS ADDRESS:	
		STREET 1:		1 CHASE MANHATTAN PLAZA
		STREET 2:		CHASE MANHATTAN BANK
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10018

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SPT Invest Management Sarl
		CENTRAL INDEX KEY:			0001831949
		STATE OF INCORPORATION:			N4
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39548
		FILM NUMBER:		211077752

	BUSINESS ADDRESS:	
		STREET 1:		21 RUE EDMOND REUTER
		CITY:			CONTERN
		STATE:			N4
		ZIP:			5326
		BUSINESS PHONE:		(732) 589-8142

	MAIL ADDRESS:	
		STREET 1:		21 RUE EDMOND REUTER
		CITY:			CONTERN
		STATE:			N4
		ZIP:			5326

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>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-07-06</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001831949</rptOwnerCik>
            <rptOwnerName>SPT Invest Management Sarl</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>21 RUE EDMOND REUTER</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>5326 CONTERN</rptOwnerCity>
            <rptOwnerState>N4</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>LUXEMBOURG</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000940418</rptOwnerCik>
            <rptOwnerName>SIEMENS AG</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>WERNER VON SIEMENS STR. 50</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>91052 ERLANGEN</rptOwnerCity>
            <rptOwnerState>2M</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>GERMANY</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class B Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-07-06</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10700000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>24869645</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents a transfer to Siemens Fonds Invest GmbH for the benefit of Siemens-Fonds SPT MM, an investment fund managed by Siemens Fonds Invest GmbH.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>SPT Invest Management Sarl, By: /s/ Thomas Gruenewald, Name: Thomas Gruenewald, Title: Director</signatureName>
        <signatureDate>2021-07-07</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>SPT Invest Management Sarl, By: /s/ Ramon Stoeckle, Name: Ramon Stoeckle, Title: Director</signatureName>
        <signatureDate>2021-07-07</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Siemens AG, By: /s/ Thomas Fredrich, Name: Thomas Fredrich, Title: Head of CF R 6 3</signatureName>
        <signatureDate>2021-07-07</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Siemens AG, By: /s/ Peter Kastenmeier, Name: Peter Kastenmeier, Title: Head of CF R 6 1</signatureName>
        <signatureDate>2021-07-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
