X0202 4 2005-06-15 0 0000929008 WESCO INTERNATIONAL INC WCC 0001312340 Singleton James Louis THE CYPRESS GROUP L.L.C. 65 EAST 55TH STREET, 28TH FLOOR NEW YORK NY 10022 1 0 1 0 Common Stock 2005-06-15 4 I 0 3803026 28.75 D 8628637 I See Common Stock 2005-06-15 4 I 0 196974 28.75 D 446899 I See As a member of The Cypress Group L.L.C., which is the general partner of Cypress Associates L.P., which is a general partner of Cypress Merchant Banking Partners L.P. and Cypress Offshore Partners L.P., the Reporting Person may be deemed, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the "Act"), to be a "ten percent beneficial owner" of shares of Common Stock directly held by Cypress Merchant Banking Partners L.P. However, pursuant to Rule 16a-1(a)(2) promulgated under the Act, the Reporting Person disclaims that he is the beneficial owner of such Common Stock. As a member of The Cypress Group L.L.C., which is the general partner of Cypress Associates L.P., which is a general partner of Cypress Merchant Banking Partners L.P. and Cypress Offshore Partners L.P., the Reporting Person may be deemed, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the "Act"), to be a "ten percent beneficial owner" of shares of Common Stock directly held by Cypress Offshore Partners L.P. However, pursuant to Rule 16a-1(a)(2) promulgated under the Act, the Reporting Person disclaims that he is the beneficial owner of such Common Stock. /s/James L. Singleton 2005-06-16