-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 B9g1CvliKpmKFeuh7o0FpqJpg8HiyyXDuBQzgKpQ3lbY4gmDQzdMmiWndvRHBmqm
 59aNIuhHfoRmMfGidnUQ1g==

<SEC-DOCUMENT>0001209191-03-012424.txt : 20030718
<SEC-HEADER>0001209191-03-012424.hdr.sgml : 20030718
<ACCEPTANCE-DATETIME>20030718120507
ACCESSION NUMBER:		0001209191-03-012424
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030625
FILED AS OF DATE:		20030718

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WESCO INTERNATIONAL INC
		CENTRAL INDEX KEY:			0000929008
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-ELECTRICAL APPARATUS & EQUIPMENT, WIRING SUPPLIES [5063]
		IRS NUMBER:				251723345
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		COMMERCE COURT 4 STATION SQUARE
		STREET 2:		STE 700
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15219
		BUSINESS PHONE:		4124542200

	MAIL ADDRESS:	
		STREET 1:		COMMERCE COURT 4 STATION SQUARE
		STREET 2:		STE 700
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15219

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CDW HOLDING CORP
		DATE OF NAME CHANGE:	19971217

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MILES GEORGE L JR
		CENTRAL INDEX KEY:			0001199427

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14989
		FILM NUMBER:		03792572

	BUSINESS ADDRESS:	
		STREET 1:		4700 ELLSWORTH AVENUE
		STREET 2:		#15
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15213
		BUSINESS PHONE:		4126221310

	MAIL ADDRESS:	
		STREET 1:		4700 ELLSWORTH AVENUE
		STREET 2:		#15
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15213
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>doc4a.xml
<DESCRIPTION>FORM 4/A SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0101</schemaVersion>    <documentType>4/A</documentType><periodOfReport>2003-06-25</periodOfReport><dateOfOriginalSubmission>2003-07-01</dateOfOriginalSubmission><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000929008</issuerCik><issuerName>WESCO INTERNATIONAL INC</issuerName>        <issuerTradingSymbol>WCC</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001199427</rptOwnerCik><rptOwnerName>MILES GEORGE L JR</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>  </rptOwnerStreet1><rptOwnerStreet2>  </rptOwnerStreet2><rptOwnerCity>  </rptOwnerCity><rptOwnerState>  </rptOwnerState><rptOwnerZipCode>  </rptOwnerZipCode></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeSecurity><securityTitle><value>No transaction bei
ng reported</value></securityTitle><transactionDate><value>1988-08-08</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>0</value></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>11501</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeSecurity><derivativeSecurity><securityTitle><value>WESCO COMMON STOCK</value></securityTitle><conversionOrExercisePrice><value>6.75</value></conversionOrExercisePrice><transactionDate><value>2003-07-01</value></trans
actionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>5000</value></transactionShares><transactionValue><value>6.75</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2006-07-01</value></exerciseDate><expirationDate><value>2013-07-01</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>WESCO COMMON STOCK</value></underlyingSecurityTitle><underlyingSecurityShares><value>5000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>10000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature>
</derivativeSecurity><footnotes></footnotes><ownerSignature><signatureName>GEORGE L. MILES, JR.</signatureName><signatureDate>2003-07-18</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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