<SEC-DOCUMENT>0001209191-18-028145.txt : 20180504
<SEC-HEADER>0001209191-18-028145.hdr.sgml : 20180504
<ACCEPTANCE-DATETIME>20180504170500
ACCESSION NUMBER:		0001209191-18-028145
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20180502
FILED AS OF DATE:		20180504
DATE AS OF CHANGE:		20180504

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Epstein Robert H
		CENTRAL INDEX KEY:			0001345117

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-24435
		FILM NUMBER:		18808798

	MAIL ADDRESS:	
		STREET 1:		1850 TOWERS CRESCENT PLAZA
		CITY:			VIENNA
		STATE:			VA
		ZIP:			22182

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MICROSTRATEGY INC
		CENTRAL INDEX KEY:			0001050446
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				510323571
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1850 TOWERS CRESCENT PLAZA
		CITY:			TYSONS CORNER
		STATE:			VA
		ZIP:			22182
		BUSINESS PHONE:		7038488600

	MAIL ADDRESS:	
		STREET 1:		1850 TOWERS CRESCENT PLAZA
		CITY:			TYSONS CORNER
		STATE:			VA
		ZIP:			22182
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<DESCRIPTION>FORM 4 SUBMISSION
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    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-05-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001050446</issuerCik>
        <issuerName>MICROSTRATEGY INC</issuerName>
        <issuerTradingSymbol>MSTR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001345117</rptOwnerCik>
            <rptOwnerName>Epstein Robert H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MICROSTRATEGY INCORPORATED</rptOwnerStreet1>
            <rptOwnerStreet2>1850 TOWERS CRESCENT PLAZA</rptOwnerStreet2>
            <rptOwnerCity>TYSONS CORNER</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>22182</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-05-02</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>121.43</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3500</value>
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            </postTransactionAmounts>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
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            <transactionDate>
                <value>2018-05-02</value>
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            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>131.49</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
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            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Director Stock Option (Right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>121.43</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2018-05-02</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2024-04-30</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3500</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10900</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The reported price is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $131.00 to $131.75 per share, inclusive.  The reporting person undertakes to provide MicroStrategy Incorporated, any security holder of MicroStrategy Incorporated, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the ranges set forth in this footnote.</footnote>
        <footnote id="F2">Of the 3,500 shares exercised on May 2, 2018 pursuant to this option, 1,900 shares vested on April 30, 2016 and 1,600 shares vested on April 30, 2017.  Of the remaining 10,900 shares subject to this option, 4,650 shares vested on April 30, 2017, and 6,250 shares vested on April 30, 2018.</footnote>
        <footnote id="F3">See Exhibit A.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ W. Ming Shao, Attorney-in-Fact</signatureName>
        <signatureDate>2018-05-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
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<TYPE>EX-99
<SEQUENCE>2
<FILENAME>attachment1.htm
<DESCRIPTION>EX-99 DOCUMENT
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<PRE>
Exhibit A:

Mr. Epstein also directly owns a director stock option to purchase 5,000 shares
of Class A common stock with (i) an exercise price of $175.98 per share and (ii)
an expiration date of May 31, 2025.  Of the 5,000 shares subject to this option,
1,250 shares vested on May 31, 2016, 1,250 shares vested on May 31, 2017, 1,250
shares are scheduled to vest on May 31, 2018, and 1,250 shares are scheduled to
vest on May 31, 2019.

Mr. Epstein also directly owns a director stock option to purchase 5,000 shares
of Class A common stock with (i) an exercise price of $186.54 per share and (ii)
an expiration date of May 31, 2026.  Of the 5,000 shares subject to this option,
1,250 shares vested on May 31, 2017, 1,250 shares are scheduled to vest on May
31, 2018, 1,250 shares are scheduled to vest on May 31, 2019, and 1,250 shares
are scheduled to vest on May 31, 2020.

Mr. Epstein also directly owns a director stock option to purchase 5,000 shares
of Class A common stock with (i) an exercise price of $182.36 per share and (ii)
an expiration date of May 31, 2027.  Of the 5,000 shares subject to this option,
1,250 shares are scheduled to vest on May 31, 2018, 1,250 shares are scheduled
to vest on May 31, 2019, 1,250 shares are scheduled to vest on May 31, 2020, and
1,250 shares are scheduled to vest on May 31, 2021.

</PRE>
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