X0303 4 2010-09-28 0 0000929008 WESCO INTERNATIONAL INC WCC 0001204621 WINDROW KIMBERLY G 225 WEST STATION SQUARE DRIVE SUITE 700 PITTSBURGH PA 15219 0 1 0 0 Vice President,Human Resources Stock Appreciation Rights 40.20 2010-09-28 4 A 0 7500 0.00 A 2020-09-28 Common Stock 7500 7500 D Subject to the terms and conditions of the related Stock Appreciation Rights Agreement, the Stock Appreciation Rights become exercisable in three (3) equal, annual installments beginning on the first anniversary of the date of grant. /s/ William W. Cline II, Attorney-in-Fact 2010-09-30