X0609 4 2026-08-17 0000929008 WESCO INTERNATIONAL INC WCC 0001832407 Khurana Akash false 225 WEST STATION SQUARE DRIVE SUITE 700 PITTSBURGH PA 15219 false true false false EVP, Chief Info & Digital Off. false Common Stock 2026-08-17 4 S false 1560 366.10 D 29243.6372 D Common Stock 2026-08-17 4 S false 1480 367.13 D 27763.6372 D Common Stock 2026-08-17 4 S false 360 368.27 D 27403.6372 D Represents weighted average sale price. These shares were sold in multiple transactions at prices ranging from $365.55 - $366.37. Upon request by the SEC, the Issuer or a stockholder of the Issuer, complete information regarding the number of shares sold at each price within the range will be provided. Represents weighted average sale price. These shares were sold in multiple transactions at prices ranging from $366.63 - $367.38. Upon request by the SEC, the Issuer or a stockholder of the Issuer, complete information regarding the number of shares sold at each price within the range will be provided. Represents weighted average sale price. These shares were sold in multiple transactions at prices ranging from $367.99 - $368.58. Upon request by the SEC, the Issuer or a stockholder of the Issuer, complete information regarding the number of shares sold at each price within the range will be provided. /s/ Michele Nelson, as Attorney-in-Fact 2026-08-18