X0609 4 2026-10-01 0 0001402057 CDW Corp CDW 0001183830 NELMS DAVID W false C/O CDW CORPORATION 200 N MILWAUKEE AVE VERNON HILLS IL 60061 1 0 0 0 0 Common Stock, par value $0.01 2026-10-01 4 A 0 258 0 A 51820.61 D This is a grant of fully vested restricted stock units under the CDW Corporation 2021 Long-Term Incentive Plan. This grant is in lieu of cash for the annual director retainer, which will be granted quarterly in arrears. Settlement into shares of CDW Corporation common stock has been deferred pursuant to each applicable award agreement. /s/ Stephanie Tso, Attorney-in-Fact 2026-10-05