================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES AND EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): NOVEMBER 20, 2003 WESCO INTERNATIONAL, INC. (Exact name of registrant as specified in its charter) Commission file number 001-14989 DELAWARE 25-1723342 (State or other jurisdiction of (IRS Employer Identification No.) incorporation or organization) 225 WEST STATION SQUARE DRIVE SUITE 700 PITTSBURGH, PENNSYLVANIA 15219 (412) 454-2200 (Address of principal executive offices) (Registrant's telephone number, including area code) N/A (Former name or former address, if changed since last report) ================================================================================ ITEM 5. OTHER EVENTS. On November 20, 2003, WESCO issued a press release announcing the purchase of 4.3 million shares of its outstanding Class B Nonvoting Convertible Common Stock. A copy of the press release is attached hereto as Exhibit 99.1. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS. a) Financial statements of businesses acquired. Not applicable. b) Pro forma financial information. Not applicable. c) Exhibits. 99.1 Press Release of WESCO International, Inc. dated November 20, 2003 2 SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. November 20, 2003 WESCO International, Inc. ---------------------------- ----------------------------------- (Date) /s/ Stephen A. Van Oss ----------------------------------- Stephen A. Van Oss Vice President, Chief Financial Officer 3 EXHIBIT INDEX Exhibit 99.1: Press release of WESCO International, Inc. dated November 20, 2003. 4