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 *
  ZIEGLER ANN ELIZABETH
 2. Date of Event Requiring Statement (Month/Day/Year)
06/26/2013		 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 $0.01 209,577
D
 
Common Stock, par value $0.01 39,121
I
See footnote (1)
Common Stock, par value $0.01 21,065
I
See footnote (2)
Common Stock, par value $0.01 314,533
I
See footnote (3)

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

Reporting Owners

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

Signatures

/s/ James S. Rowe, Attorney-in-Fact 06/26/2013
**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) Includes 39,121 shares held by the Ann E. Ziegler IRA Northern Trust Bank which are deemed to be beneficially owned by Ms. Ziegler.
(2) Includes 21,065 shares held by the Mark A. Orloff Irrevocable Trust, the assets of which trust, including the 21,065 shares, are pledged to secure a loan incurred by the trust, which are deemed to be beneficially owned by Ms. Ziegler.
(3) Incldudes 314,533 shares held by the Ann E. Ziegler 2012 Gift Trust which are deemed to be beneficially owned by Ms. Ziegler.
 
Remarks:
SENIOR VICE PRESIDENT AND CHIEF FINANCIAL OFFICER

Exhibit List:  Exhibit 24 - Power of Attorney

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