Sec Form 4/A Filing - SWED PATRICK M @ WESCO INTERNATIONAL INC - 2005-03-09

FORM 4/A Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person SWED PATRICK M 2. Issuer Name and Ticker or Trading Symbol WESCO INTERNATIONAL INC [ WCC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) VICE PRESIDENT, OPERATIONS (Last) (First) (Middle) 225 WEST STATION SQUARE DRIVE, SUITE 700 3. Date of Earliest Transaction (MM/DD/YY) 03/09/2005 (Street) PITTSBURGH, PA15219 4. If Amendment, Date Original Filed (MM/DD/YY) 03/10/2005 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares WESCO INTERNATIONAL COMMON STOCK $ 36.05 03/09/2005 03/09/2005 X 1,900 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 1,900 $ 10.75 12,767 D WESCO INTERNATIONAL COMMON STOCK $ 36.06 03/09/2005 03/09/2005 X 1,000 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 1,000 $ 10.75 11,767 D WESCO INTERNATIONAL COMMON STOCK $ 36.08 03/09/2005 03/09/2005 X 700 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 700 $ 10.75 11,067 D WESCO INTERNATIONAL COMMON STOCK $ 36.09 03/09/2005 03/09/2005 X 100 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 100 $ 10.75 10,967 D WESCO INTERNATIONAL COMMON STOCK $ 36.11 03/09/2005 03/09/2005 X 2,600 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 2,600 $ 10.75 8,367 D WESCO INTERNATIONAL COMMON STOCK $ 36.12 03/09/2005 03/09/2005 X 100 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 100 $ 10.75 8,267 D WESCO INTERNATIONAL COMMON STOCK $ 36.14 03/09/2005 03/09/2005 X 200 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 200 $ 10.75 8,067 D WESCO INTERNATIONAL COMMON STOCK $ 36.15 03/09/2005 03/09/2005 X 300 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 300 $ 10.75 7,767 D WESCO INTERNATIONAL COMMON STOCK $ 36.17 03/09/2005 03/09/2005 X 300 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 300 $ 10.75 7,467 D WESCO INTERNATIONAL COMMON STOCK $ 36.2 03/09/2005 03/09/2005 X 600 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 600 $ 10.75 6,867 D WESCO INTERNATIONAL COMMON STOCK $ 36.21 03/09/2005 03/09/2005 X 600 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 600 $ 10.75 6,267 D WESCO INTERNATIONAL COMMON STOCK $ 36.22 03/09/2005 03/09/2005 X 100 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 100 $ 10.75 6,167 D WESCO INTERNATIONAL COMMON STOCK $ 36.24 03/09/2005 03/09/2005 X 900 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 900 $ 10.75 5,267 D WESCO INTERNATIONAL COMMON STOCK $ 36.29 03/09/2005 03/09/2005 X < /td> 100 06/05/2002 08/06/2008( 1 ) WESCO INTERNATIONAL COMMON STOCK 100 $ 10.75 5,167 D WESCO INTERNATIONAL COMMON STOCK $ 35.96 03/09/2005 03/09/2005 X 5,167 08/22/2004 08/22/2013( 1 ) WESCO INTERNATIONAL COMMON STOCK 5,167 $ 5.9 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other SWED PATRICK M 225 WEST STATION SQUARE DRIVE, SUITE 700 PITTSBURGH, PA15219 VICE PRESIDENT, OPERATIONS Signatures /s/ PATRICK M. SWED 03/21/2005 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the provisions of the Long-Term Option Agreements.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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