<SEC-DOCUMENT>0001222526-20-000010.txt : 20200728
<SEC-HEADER>0001222526-20-000010.hdr.sgml : 20200728
<ACCEPTANCE-DATETIME>20200728163525
ACCESSION NUMBER:		0001222526-20-000010
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200727
FILED AS OF DATE:		20200728
DATE AS OF CHANGE:		20200728

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WOLTOSZ WALTER S
		CENTRAL INDEX KEY:			0001222526

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32046
		FILM NUMBER:		201054306

	MAIL ADDRESS:	
		STREET 1:		42505 10TH ST. WEST
		CITY:			LANCASTER
		STATE:			CA
		ZIP:			93534

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WOLTOSZ VIRGINIA E
		CENTRAL INDEX KEY:			0001222527

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32046
		FILM NUMBER:		201054307

	MAIL ADDRESS:	
		STREET 1:		42505 10TH STREET WEST
		CITY:			LANCASTER
		STATE:			CA
		ZIP:			93534

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SIMULATIONS PLUS INC
		CENTRAL INDEX KEY:			0001023459
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER INTEGRATED SYSTEMS DESIGN [7373]
		IRS NUMBER:				954595609
		FISCAL YEAR END:			0831

	BUSINESS ADDRESS:	
		STREET 1:		42505 10TH STREET WEST
		CITY:			LANCASTER
		STATE:			CA
		ZIP:			93534-7059
		BUSINESS PHONE:		661-723-7723

	MAIL ADDRESS:	
		STREET 1:		42505 10TH STREET WEST
		CITY:			LANCASTER
		STATE:			CA
		ZIP:			93534-7059
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-07-27</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001023459</issuerCik>
        <issuerName>SIMULATIONS PLUS INC</issuerName>
        <issuerTradingSymbol>SLP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001222526</rptOwnerCik>
            <rptOwnerName>WOLTOSZ WALTER S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>42505 10TH ST. WEST</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LANCASTER</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>93534</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001222527</rptOwnerCik>
            <rptOwnerName>WOLTOSZ VIRGINIA E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>42505 10TH STREET WEST</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LANCASTER</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>93534</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Simulations Plus, Inc. common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-07-27</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>24000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>66.13</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4779153</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Automatic sales under 10b5-1 program:
11,678 shares sold on 07/27/2020 at average $66.6111/share
12,322 shares sold on 07/28/2020 at average $65.6657/share
11,678*$66.6111 + 12,322*$65.6657 = $1,587,017.18
$1,587,017.18/24,000 = $66.1257 average per share</footnote>
    </footnotes>

    <remarks>Automatic sales under 10b5-1 program</remarks>

    <ownerSignature>
        <signatureName>Walter S Woltosz</signatureName>
        <signatureDate>2020-07-28</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Virginia E Woltosz</signatureName>
        <signatureDate>2020-07-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
