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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001072613-10-001006.txt : 20101116
<SEC-HEADER>0001072613-10-001006.hdr.sgml : 20101116
<ACCEPTANCE-DATETIME>20101116145701
ACCESSION NUMBER:		0001072613-10-001006
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101112
FILED AS OF DATE:		20101116
DATE AS OF CHANGE:		20101116

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MAHONEY DAVID
		CENTRAL INDEX KEY:			0001203563

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19960
		FILM NUMBER:		101196270

	MAIL ADDRESS:	
		STREET 1:		289 TURNPIKE RD
		CITY:			WESTBORO
		STATE:			MA
		ZIP:			01581

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DATAWATCH CORP
		CENTRAL INDEX KEY:			0000792130
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				020405716
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		271 MILL ROAD
		STREET 2:		QUORUM OFFICE PARK
		CITY:			CHELMSFORD
		STATE:			MA
		ZIP:			01824
		BUSINESS PHONE:		978-441-2200

	MAIL ADDRESS:	
		STREET 1:		271 MILL ROAD
		STREET 2:		QUORUM OFFICE PARK
		CITY:			CHELMSFORD
		STATE:			MA
		ZIP:			01824
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>mahoney4-111210_16953.xml
<DESCRIPTION>DAVID C. MAHONEY
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-11-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000792130</issuerCik>
        <issuerName>DATAWATCH CORP</issuerName>
        <issuerTradingSymbol>DWCH</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001203563</rptOwnerCik>
            <rptOwnerName>MAHONEY DAVID</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O DATAWATCH CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>271 MILL ROAD, QUORUM OFFICE PARK</rptOwnerStreet2>
            <rptOwnerCity>CHELMSFORD</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01824</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-11-12</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>100000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.75</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>127580</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">27,580 of the securities reported in column 5 are in the form of restricted stock units (RSUs) issued pursuant to the Datawatch 2006 Equity Compensation and Incentive Plan. 833 RSUs will vest on 9/9/2011 and an additional 833 RSUs will vest at 9/9/2012, with the final 834 RSUs vesting on 9/9/2013. This vesting schedule is subject to acceleration in certain instances in connection with an acquisition or other change of control event.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: /s/ David C. Mahoney</signatureName>
        <signatureDate>2010-11-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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