X0508 4 2026-03-05 0 0001402057 CDW Corp CDW 0001182047 BELL JAMES A C/O CDW CORPORATION 200 N MILWAUKEE AVE VERNON HILLS IL 60061 1 0 0 0 0 Common Stock, par value $0.01 2026-03-05 4 A 0 1609 0 A 25731.53 D Common Stock, par value $0.01 2026-03-05 4 A 0 402 0 A 26133.53 D This is a grant of restricted stock units under the CDW Corporation Long-Term Incentive Plan. The restricted stock units vest on the first anniversary of the date of grant and settlement into shares of CDW Corporation common stock has been deferred until separation from service on the Board of Directors. This is a grant of restricted stock units under the CDW Corporation Long-Term Incentive Plan for Mr. Bell's service as Lead Independent Director. The restricted stock units vest on the first anniversary of the date of grant and settlement into shares of CDW Corporation common stock is deferred until separation from service on the Board of Directors. /s/ Debra Wasserman, Attorney-in-Fact 2026-03-09