Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  KIRBY ROBERT F.
 2. Date of Event Requiring Statement (Month/Day/Year)
07/02/2018		 3. Issuer Name and Ticker or Trading Symbol
CDW Corp [CDW]
(Last)
(First)
(Middle)
C/O CDW CORPORATION, 200 N MILWAUKEE AVE		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
See Remarks
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

VERNON HILLS, IL 60061		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock, par value $0.01 36,450.55
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (Right to Buy)   (1) 02/27/2028 Common Stock, par value $0.01 6,185 $ 73.49 D  
Employee Stock Option (Right to Buy)   (2) 02/28/2027 Common Stock, par value $0.01 7,651 $ 58.9 D  
Employee Stock Option (Right to Buy)   (3) 03/02/2026 Common Stock, par value $0.01 7,653 $ 39.79 D  
Employee Stock Option (Right to Buy)   (4) 02/19/2025 Common Stock, par value $0.01 5,629 $ 37.79 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
KIRBY ROBERT F.
C/O CDW CORPORATION
200 N MILWAUKEE AVE
VERNON HILLS, IL 60061		       See Remarks  

Signatures

/s/ Robert J. Welyki, Attorney-in-Fact 07/11/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) 6,185 options were granted of which one third of the shares vest on each of February 27, 2019, 2020 and 2021. The grant was made under the CDW Corporation 2013 Long-Term Incentive Plan.
(2) 7,651 options were granted of which one third of the shares vest on each of February 28, 2018, 2019 and 2020. The grant was made under the CDW Corporation 2013 Long-Term Incentive Plan.
(3) 7,653 options were granted of which one third of the shares vest on each of March 2, 2017, 2018 and 2019. The grant was made under the CDW Corporation 2013 Long-Term Incentive Plan.
(4) 7,939 options were granted of which one third of the shares vested on each of February 19, 2016, 2017 and 2018. The grant was made under the CDW Corporation 2013 Long-Term Incentive Plan.
 
Remarks:
Senior Vice President - Public Sales

Exhibit List: Exhibit 24- Power of Attorney

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