Corporate Profile

WESCO International, Inc. (NYSE: WCC) is a leading distributor of electrical construction products and electrical and industrial maintenance, repair and operating (MRO) supplies, and is the nation’s largest provider of integrated supply services. Headquartered in Pittsburgh, Pennsylvania, the company employs approximately 5,700 people, maintains relationships with 24,000 suppliers, and serves more than 100,000 customers worldwide. Major markets include commercial and industrial firms, contractors, governmental agencies, educational institutions, telecommunications businesses and utilities. WESCO operates five fully automated distribution centers and over 350 full-service branches in North America and selected international markets, providing a local presence for area customers and a global network to serve multi-location businesses and multi-national corporations.

Corporate Headquarters Commerce Court, Suite 700 Four Station Square Pittsburgh, PA 15219 Phone: 412-454-2200 www.wescodist.com Investor Relations For questions regarding WESCO, contact Daniel A. Brailer, Treasurer, at dbrailer@wescodist.com. A copy of the Company’s Annual Report on Form 10-K or other financial information may be requested through our web site (www.wescodist.com) or by contacting Investor Relations. Common Stock WESCO International, Inc. is listed on the New York Stock Exchange under the ticker symbol WCC.

Annual Meeting The Annual Meeting of shareholders will be held on Wednesday, May 22, 2002, at 2:00 p.m., E.T., at the Sheraton Station Square Hotel, Pittsburgh, PA. Transfer Agent Mellon Investor Services, L.L.C. 85 Challenger Road Overpeck Centre Ridgefield Park, NJ 07660 www.mellon-investor.com Phone: 1-800-756-3353 Outside the U.S.: 1-201-329-8660 The hearing disabled can access TDD service at: 1-800-231-5469 (within the U.S.) or 1-201-329-8354. Independent Public Accountants PricewaterhouseCoopers LLP Pittsburgh, PA