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
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  FAIRFIELD NEIL B
 2. Date of Event Requiring Statement (Month/Day/Year)
08/11/2015		 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)
VICE PRESIDENT & CONTROLLER
 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 1,021.14 (1)
D
 
Common Stock, par value $0.01 1,992.3 (2)
D
 
Common Stock, par value $0.01 91 (3)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

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)   (4) 08/13/2024 Common Stock 2,028 $ 31.64 D  
Employee Stock Option (Right to Buy)   (5) 02/19/2025 Common Stock 5,954 $ 37.79 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
FAIRFIELD NEIL B
C/O CDW CORPORATION
200 N. MILWAUKEE AVE
VERNON HILLS, IL 60061		       VICE PRESIDENT & CONTROLLER  

Signatures

/s/ James S. Rowe, under Power of Attorney 08/12/2015
**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) 100% of the restricted stock units vest on December 31, 2016. The grant was made under the CDW Corporation 2013 Long-Term Incentive Plan (the "LTIP").
(2) 100% of the restricted stock units vest on December 31, 2017. The grant was made under the LTIP.
(3) Shares were acquired under the CDW Corporation Coworker Stock Purchase Plan.
(4) The options vest as to one half of the shares on each of February 25, 2016 and 2017. The grant was made under the LTIP.
(5) The options vest as to one third of the shares on each of the first three anniversaries of the date of grant (February 19, 2015). The grant was made under the LTIP.
 
Remarks:
Exhibit List:  Exhibit 24 - Power of Attorney

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.