| 10.18** | | | CDW Director Deferred Compensation Plan | | | 10-K | | | 10.23 | | | 2/28/2022 | | | | | |
| 10.19** | | | Form of Performance Share Unit Award Agreement under the CDW Corporation 2021 Long-Term Incentive Plan for certain awards on or after March 5, 2025 | | | 10-Q | | | 10.1 | | | 5/7/2025 | | | | | |
| 10.20** | | | Form of Performance Share Unit Award Agreement under the CDW Corporation 2021 Long-Term Incentive Plan for certain awards on or after March 5, 2025 | | | 10-Q | | | 10.2 | | | 5/7/2025 | | | | | |
| 10.21** | | | Form of Restricted Stock Unit Award Agreement under the CDW Corporation 2021 Long-Term Incentive Plan for certain awards on or after March 5, 2025 | | | 10-Q | | | 10.3 | | | 5/7/2025 | | | | | |
| 10.22** | | | Form of Restricted Stock Unit Award Agreement under the CDW Corporation 2021 Long-Term Incentive Plan for certain awards on or after March 5, 2025 | | | 10-Q | | | 10.4 | | | 5/7/2025 | | | | | |
| 10.23** | | | Form of Non-Employee Director Unrestricted Stock Unit Award Agreement under the CDW Corporation 2021 Long-Term Incentive Plan for share units issued in lieu of cash retainer fees earned prior to January 1, 2026 | | | 10-Q | | | 10.5 | | | 5/7/2025 | | | | | |
| 10.24** | | | Letter of Understanding, dated as of October 27, 2025, by and among CDW Corporation, CDW LLC, and Sona Chawla | | | | | | | | | | | | X | | |
| 10.25** | | | Form of Non-Employee Director Restricted Stock Unit Award Agreement under the CDW Corporation 2021 Long-Term Incentive Plan for awards granted on or after February 13, 2026 | | | | | | | | | | | | X | | |
| 10.26** | | | Form of Lead Independent Director Restricted Stock Unit Award Agreement under the CDW Corporation 2021 Long-Term Incentive Plan for awards granted on or after February 13, 2026 | | | | | | | | | | | | X | | |
| 10.27** | | | Form of Non-Employee Director Unrestricted Stock Unit Award Agreement under the CDW Corporation 2021 Long-Term Incentive Plan for share units issued in lieu of cash retainer fees earned on or after January 1, 2026 | | | | | | | | | | | | X | | |
| 19 | | | CDW Corporation Policy on Insider Trading | | | 10-K | | | 19.1 | | | 2/21/2025 | | | | | |
| 21 | | | List of subsidiaries | | | | | | | | | | | | X | | |
| 22 | | | List of Issuer and Guarantor subsidiaries | | | | | | | | | | | | X | | |
| 23 | | | Consent of Ernst & Young LLP | | | | | | | | | | | | X | | |
| 31.1 | | | Certification of Chief Executive Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) under the Securities Exchange Act of 1934 | | | | | | | | | | | | X | | |
| 31.2 | | | Certification of Chief Financial Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) under the Securities Exchange Act of 1934 | | | | | | | | | | | | X | | |
| 32.1* | | | Certification of Chief Executive Officer pursuant to 18 U.S.C. 1350 | | | | | | | | | | | | | | |
| 32.2* | | | Certification of Chief Financial Officer pursuant to 18 U.S.C. 1350 | | | | | | | | | | | | | | |
| 97** | | | CDW Corporation Restatement Disgorgement Policy | | | 10-K | | | 97.1 | | | 2/26/2024 | | | | | |
| 101.INS | | | XBRL Instance Document | | | | | | | | | | | | X | | |
| 101.SCH | | | Inline XBRL Taxonomy Extension Schema Document | | | | | | | | | | | | X | | |
| 101.CAL | | | Inline XBRL Taxonomy Extension Calculation Linkbase Document | | | | | | | | | | | | X | | |
| 101.DEF | | | Inline XBRL Taxonomy Extension Definition Linkbase Document | | | | | | | | | | | | X | | |
| 101.LAB | | | Inline XBRL Taxonomy Extension Label Linkbase Document | | | | | | | | | | | | X | | |
| 101.PRE | | | Inline XBRL Taxonomy Extension Presentation Linkbase Document | | | | | | | | | | | | X | | |
| 104 | | | Cover Page Interactive Data File (embedded within the Inline XBRL document) | | | | | | | | | | | | X | | |