X0306 4 2014-02-24 0 0000929008 WESCO INTERNATIONAL INC WCC 0001220571 LIN SANDRA BEACH 225 WEST STATION SQUARE DRIVE SUITE 700 PITTSBURGH PA 15219 1 0 0 0 WESCO International, Inc. Common Stock 2014-02-24 4 M 0 2500 69.00 A 7823 D WESCO International, Inc. Common Stock 2014-02-24 4 D 0 2019 85.44 D 5804 D WESCO International, Inc. Common Stock 2014-02-24 4 M 0 3500 60.45 A 9304 D WESCO International, Inc. Common Stock 2014-02-24 4 D 0 2477 85.44 D 6827 D WESCO International, Inc. Common Stock 2014-02-25 4 S 0 1504 84.6933 D 5323 D Stock Appreciaion Right 69.00 2014-02-24 4 M 0 2500 0.00 D 2016-07-01 Common Stock 2500 0 D Stock Appreciaion Right 60.45 2014-02-24 4 M 0 3500 0.00 D 2017-07-01 Common Stock 3500 0 D This represents the weighted average price paid for the shares. The shares were sold at prices ranging from $84.65 to $84.766. Ms. Beach Lin will provide, upon request of the SEC staff, WESCO International, Inc., or a shareholder of WESCO International, Inc., complete information regarding the number of shares purchased at each price within the range. The Stock Appreciation Right became exercisable in three (3) equal, annual installments beginning on July 1, 2009. The Stock Appreciation Right became exercisable in three (3) equal, annual installments beginning on July 1, 2010. /s/ William W. Cline II, as Attorney-in-Fact 2014-02-26