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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 LcJ1S1RQ+GXeJHPxLvZ/8seVAvq3c1z8OB6dcBoLAkYS2PH3DlagZNS0PEQ6e6bA
 K/J/UPN7n5m4aXPNFj4kbQ==

<SEC-DOCUMENT>0001144204-10-068706.txt : 20101229
<SEC-HEADER>0001144204-10-068706.hdr.sgml : 20101229
<ACCEPTANCE-DATETIME>20101229170712
ACCESSION NUMBER:		0001144204-10-068706
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101229
FILED AS OF DATE:		20101229
DATE AS OF CHANGE:		20101229

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WELCH JAMES L
		CENTRAL INDEX KEY:			0001178218

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21057
		FILM NUMBER:		101278896

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DYNAMEX INC
		CENTRAL INDEX KEY:			0001015483
		STANDARD INDUSTRIAL CLASSIFICATION:	TRUCKING & COURIER SERVICES (NO AIR) [4210]
		IRS NUMBER:				860712225
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0731

	BUSINESS ADDRESS:	
		STREET 1:		5429 LBJ FREEWAY
		STREET 2:		SUITE 1000
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240
		BUSINESS PHONE:		214-560-9000

	MAIL ADDRESS:	
		STREET 1:		5429 LBJ FREEWAY
		STREET 2:		SUITE 1000
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>v206823_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-12-29</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001015483</issuerCik>
        <issuerName>DYNAMEX INC</issuerName>
        <issuerTradingSymbol>DDMX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001178218</rptOwnerCik>
            <rptOwnerName>WELCH JAMES L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5429 LBJ FREEWAY</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1000</rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75240</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-12-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>24.76</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>/s/ James L. Welch</signatureName>
        <signatureDate>2010-12-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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