X0206 3 2015-08-11 0 0001402057 CDW Corp CDW 0001649962 FAIRFIELD NEIL B C/O CDW CORPORATION 200 N. MILWAUKEE AVE VERNON HILLS IL 60061 0 1 0 0 VICE PRESIDENT & CONTROLLER Common Stock, par value $0.01 1021.14 D Common Stock, par value $0.01 1992.3 D Common Stock, par value $0.01 91 D Employee Stock Option (Right to Buy) 31.64 2024-08-13 Common Stock 2028 D Employee Stock Option (Right to Buy) 37.79 2025-02-19 Common Stock 5954 D 100% of the restricted stock units vest on December 31, 2016. The grant was made under the CDW Corporation 2013 Long-Term Incentive Plan (the "LTIP"). 100% of the restricted stock units vest on December 31, 2017. The grant was made under the LTIP. Shares were acquired under the CDW Corporation Coworker Stock Purchase Plan. The options vest as to one half of the shares on each of February 25, 2016 and 2017. The grant was made under the LTIP. The options vest as to one third of the shares on each of the first three anniversaries of the date of grant (February 19, 2015). The grant was made under the LTIP. Exhibit List: Exhibit 24 - Power of Attorney /s/ James S. Rowe, under Power of Attorney 2015-08-12