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

CDW Corporation, a Delaware corporation (the “Company”), hereby grants to Holder as of the date of grant (the “Grant Date”), pursuant to the provisions of the CDW Corporation 2021 Long-Term Incentive Plan (the “Plan”), an unrestricted stock unit award (the “Award”) pursuant to Section 3.4 of the Plan with respect to the number of shares of the Company’s Common Stock, $0.01 par value per share (“Stock”), determined by the Company based on the Holder’s election to receive shares in lieu of the Holder’s fully-earned cash fees for service as a Non-Employee Director, upon and subject to the restrictions, terms and conditions set forth in the Plan and this agreement (the “Agreement”).

1.Rights as a Stockholder. The Holder shall not be entitled to any privileges of ownership with respect to the shares of Stock subject to the Award until the Holder becomes a stockholder of record with respect to such shares. As of each date on which the Company pays a cash dividend to record owners of shares of Stock (a “Dividend Date”) which occurs prior to the settlement of the Award, the number of shares subject to the Award shall increase by (i) the product of the total number of shares subject to the Award immediately prior to such Dividend Date multiplied by the dollar amount of the cash dividend paid per share of Stock by the Company on such Dividend Date, divided by (ii) the Fair Market Value of a share of Stock on such Dividend Date. Any such additional shares shall be subject to the same vesting conditions and payment terms set forth herein as the shares to which they relate.

2.Investment Representation. The Holder hereby covenants that (a) any sale of any share of Stock acquired upon the vesting of the Award shall be made either pursuant to an effective registration statement under the Securities Act of 1933, as amended (the "Securities Act"), and any applicable state securities laws, or pursuant to an exemption from registration under the Securities Act and such state securities laws and (b) the Holder shall comply with all regulations and requirements of any regulatory authority having control of or supervision over the issuance of the shares and, in connection therewith, shall execute any documents which the Committee shall in its sole discretion deem necessary or advisable.

3.Additional Terms and Conditions of Award.

3.1.Compliance with Applicable Law. The Award is subject to the condition that if the listing, registration or qualification of the shares of Stock subject to the Award upon any securities exchange or under any law, or the consent or approval of any governmental body, or the taking of any other action is necessary or desirable as a condition of, or in connection with, the delivery of shares hereunder, the shares of Stock subject to the Award shall not be delivered, in whole or in part, unless such listing, registration, qualification, consent, approval or other action shall have been effected or obtained, free of any conditions not acceptable to the Company. The Company agrees to use reasonable efforts to effect or obtain any such listing, registration, qualification, consent, approval or other action.

3.2.Delivery of Stock. Subject to the terms of this Agreement and any deferral election made by the Holder in accordance with Section 409A of the Code, within thirty (30) days following the Grant Date, the Company shall deliver or cause to be delivered to the

Holder the shares of Stock subject to this Award. The Company shall pay all original issue or transfer taxes and all fees and expenses incident to such delivery.

3.3.Deferral of Stock.

(a)Initial Deferral Election. Subject to Section 409A of the Code, the Holder may complete a deferral election provided by the Company to defer the receipt of 100% of the shares of the Stock issuable pursuant to this Agreement until the earlier to occur of (i) a specified date at least five (5) years following the Grant Date and (ii) the date of the Holder’s separation from service.

(b)Extension of Distribution Date. The Holder may elect to extend the date on which the shares of Stock are distributed to the Holder; provided that (i) such election must be submitted to the Company in writing, in accordance with procedures prescribed by the Company, not less than 12 months before the date the shares are scheduled to be distributed, (ii) such election shall not take effect until 12 months after the date on which the election is made and (iii) the distribution date is extended until the earlier to occur of (A) the fifth (5th) anniversary of the previously scheduled distribution date and (B) the date of the Holder’s separation from service.

(c)Dividend Equivalents. Until the distribution of shares of Stock deferred pursuant to this Section 3.3, such shares shall continue to be credited with dividend equivalents, which shall be reinvested as additional deferred shares in accordance with Section 1.

3.4.Award Confers No Rights to Continued Service. In no event shall the granting of the Award or its acceptance by the Holder, or any provision of the Agreement or the Plan, give or be deemed to give the Holder any right to continued service with the Company, any Subsidiary or any affiliate of the Company.

3.5.Decisions of Board or Committee. The Board or the Committee shall have the right to resolve all questions which may arise in connection with the Award. Any interpretation, determination or other action made or taken by the Board or the Committee regarding the Plan or this Agreement shall be final, binding and conclusive.

3.6.Successors. This Agreement shall be binding upon and inure to the benefit of any successor or successors of the Company and any person or persons who shall, upon the death of the Holder, acquire any rights hereunder in accordance with this Agreement or the Plan.

3.7.Taxation. The Holder understands that the Holder is solely responsible for all tax consequences to the Holder in connection with this Award and, due to the Holder’s status as a Non-Employee Director, the Company shall not withhold any taxes with respect to this Award. The Holder represents that the Holder has consulted with any tax consultants the Holder deems advisable in connection with the Award and that the Holder is not relying on the Company for any tax advice.

3.8.Notices. All notices, requests or other communications provided for in this Agreement shall be made, if to the Company, to CDW Corporation, Attn: General Counsel, 200 N. Milwaukee Avenue, Vernon Hills, Illinois 60061, and if to the Holder, to the last known mailing address of the Holder contained in the records of the Company. All notices, requests or other communications provided for in this Agreement shall be made in writing either (a) by personal delivery, (b) by facsimile or electronic mail with confirmation of receipt, (c) by mailing in the United States mails or (d) by express courier service. The notice, request or other

communication shall be deemed to be received upon personal delivery, upon confirmation of receipt of facsimile or electronic mail transmission or upon receipt by the party entitled thereto if by United States mail or express courier service; provided, however, that if a notice, request or other communication sent to the Company is not received during regular business hours, it shall be deemed to be received on the next succeeding business day of the Company.

3.9.Governing Law. This Agreement, the Award and all determinations made and actions taken pursuant hereto and thereto, to the extent not governed by the laws of the United States, shall be governed by the laws of the State of Delaware and construed in accordance therewith without giving effect to principles of conflicts of laws.

3.10.Agreement Subject to the Plan. This Agreement is subject to the provisions of the Plan and shall be interpreted in accordance therewith. In the event that the provisions of this Agreement and the Plan conflict, the Plan shall control. The Holder hereby acknowledges receipt of a copy of the Plan.

3.11.Entire Agreement. This Agreement and the Plan constitute the entire agreement of the parties with respect to the shares of Stock subject to this Award and supersede in their entirety all prior undertakings and agreements of the Company and the Holder with respect to such shares of Stock, and may not be modified adversely to the Holder’s interest except by means of a writing signed by the Company and the Holder.

3.12.Partial Invalidity. The invalidity or unenforceability of any particular provision of this Agreement shall not affect the other provisions hereof and this Agreement shall be construed in all respects as if such invalid or unenforceable provision was omitted.

3.13.Amendment and Waiver. The Company may amend the provisions of this Agreement at any time; provided that an amendment that would adversely affect the Holder’s rights under this Agreement shall be subject to the written consent of the Holder. No course of conduct or failure or delay in enforcing the provisions of this Agreement shall affect the validity, binding effect or enforceability of this Agreement.

3.14.Section 409A. The provisions of this Agreement shall be construed and interpreted in a manner consistent with the requirements for avoiding taxes or penalties under Section 409A of the Code. If the Company determines that any amounts payable hereunder may be taxable to the Holder under Section 409A of the Code, the Company may (i) adopt such amendments to the Agreement and appropriate policies and procedures, including amendments and policies with retroactive effect, that the Company determines necessary or appropriate to preserve the intended tax treatment of the benefits provided by this Agreement and/or (ii) take such other actions as the Company determines necessary or appropriate to avoid or limit the imposition of an additional tax under Section 409A; provided, that neither the Company nor any of its Affiliates nor any other person or entity shall have any liability to the Holder with respect to the tax imposed by Section 409A of the Code.