SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  ------------


                    Under the Securities Exchange Act of 1934

                                  SCHEDULE 13G


             INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934




                            WESCO International, Inc.
                                (Name of Issuer)



                          Common Stock, $0.01 par value
                         (Title of Class of Securities)



                                    95082P105
                                 (CUSIP Number)

                                November 1, 2004
             (Date of Event Which Requires Filing of this Statement)



Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

      |_|  Rule 13d-1(b)
      |_|  Rule 13d-1(c)
      |X|  Rule 13d-1(d)



                                Page 1 of 6 Pages

SCHEDULE 13G CUSIP No. 456925106 Page 2 of 6 Pages - -------------------------------------------------------------------------------- 1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Co-Investment Partners, L.P. - -------------------------------------------------------------------------------- 2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |_| (b) |_| - -------------------------------------------------------------------------------- 3) SEC USE ONLY - -------------------------------------------------------------------------------- 4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware, U.S.A. - -------------------------------------------------------------------------------- 5) SOLE VOTING POWER NUMBER 3,493,789 OF -------------------------------------------------- SHARES 6) SHARED VOTING POWER BENEFICIALLY OWNED BY 0 EACH -------------------------------------------------- REPORTING 7) SOLE DISPOSITIVE POWER PERSON WITH 3,493,789 -------------------------------------------------- 8) SHARED DISPOSITIVE POWER 0 - -------------------------------------------------------------------------------- 9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,493,789 - -------------------------------------------------------------------------------- 10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES |_| - -------------------------------------------------------------------------------- 11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 8.35% - -------------------------------------------------------------------------------- 12) TYPE OF REPORTING PERSON PN - --------------------------------------------------------------------------------

Schedule 13G - ------------ Item 1(a). Name of Issuer: WESCO International, Inc. Item 1(b). Address of Issuer's Principal Executive Offices: 225 West Station Square, Suite 700 Pittsburgh, Pennsylvania 15219 Item 2(a). Name of Persons Filing: Co-Investment Partners, L.P. Item 2(b). Address of Principal Business Office or, if None, Residence: c/o CIP Partners, LLC 660 Madison Avenue, 23rd Floor New York, New York 10021 Item 2(c). Citizenship or Place of Organization: Delaware, U.S.A. Item 2(d). Title of Class of Securities: Common Stock, $0.01 par value Item 2(e). CUSIP Number: 95082P105 Item 3. If this statement is filed pursuant to ss.ss. 240.13d-1(b), or 240.13d-2(b) or (c), check whether the person filing is a: Not applicable. Item 4. Ownership. (a) Amount beneficially owned: 3,493,789 (b) Percent of class: 8.35% (c) Number of shares as to which such person has: (i) Sole power to vote or to direct the vote: 3,493,789 (ii) Shared power to vote or to direct the vote: 0 (iii) Sole power to dispose or to direct the disposition of: 3,493,789

(iv) Shared power to dispose or to direct the disposition of: 0 Item 5. Ownership of Five Percent or Less of a Class. Not applicable. Item 6. Ownership of More than Five Percent on Behalf of Another Person. Not applicable. Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company. Not applicable. Item 8. Identification and Classification of Members of the Group. Not applicable. Item 9. Notice of Dissolution of Group. Not applicable. Item 10. Certification. Not applicable.

SIGNATURE --------- After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Co-Investment Partners, L.P. By: CIP Partners, LLC, its General Partner By: /s/ David B. Outcalt ------------------------------- Name: David B. Outcalt Title: Managing Member Dated as of November 1, 2004