Tranche Update on CDW Corporation's Equity Buyback Plan announced on November 6, 2014.

CDW Corporation is a leading American distributor of multi-brand computer products. The activity is organized around 5 families of products: - computer hardware: personal assistants, micro-computers, servers, etc.; - software; - Internet and communication products: primarily modems and access equipment; - video products; - data storage products. Net sales break down by market between large companies (43.6%), public enterprises (36%), small companies (8.2%) and other (12.2%). The United States account for 87.7% of net sales.