X0201 42003-08-2200000929008WESCO INTERNATIONAL INC WCC0001208268BRAILER DANIEL A225 WEST STATION SQUARE DRIVE, SUITE 700PITTSBURGHPA152190100TREASURER/ CORPORATE SECRETARYWESCO International Common Stock9175DOption for WESCO International Common Stock182009-05-11WESCO International Common Stock91759175DOption for WESCO International Common Stock9.8752010-05-11WESCO International Common Stock750016675DOption for WESCO International Common Stock4.52011-12-21WESCO International Common Stock1000026675DOption for WESCO International Common Stock7.082012-05-01WESCO International Common Stock1000036675DOption for WESCO International Common Stock5.92003-08-224A0225005.9A2013-08-22WESCO International Common Stock2250059175DHalf of the options granted vested over a four-year time period beginning with the grant date, with the remaining half being subject to accellerated vesting based on performance. Any options not yet vested become vested 90 days prior to the expiration date of the options.Options are subject to performance vesting, with any unvested options becoming vested 90 days prior to the expiration date of such options.Options vest at a rate of 1/3 per year on the anniversary date of the option grant over the next three years./s/ Daniel A. Brailer2003-08-26