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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1402057	Cdw Corp	CDW	Retail-Catalog & Mail-Order Houses (5961)	260273989

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1214029	Elizabeth Ann Ziegler	C/O Cdw Corporation 200 N. Milwaukee Ave Vernon Hills IL 60061	See Remarks	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock, Par Value $0.01	Disposition	2013-11-19	21,065	$20.50	0	No	4	S	Indirect	See footnote
Common Stock, Par Value $0.01	Disposition	2013-11-19	44,444	$20.50	270,089	No	4	S	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See footnote
No	4	S	Indirect	See footnote

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock, Par Value $0.01	209,577	Direct
Common Stock, Par Value $0.01	39,121	Indirect	See footnote

Footnotes

Represents shares of CDW Corporation common stock sold in an underwritten secondary offering.
Represents shares held by the Mark A. Orloff Irrevocable Trust, which were deemed to be beneficially owned by Ms. Ziegler.
Represents shares held by the Ann E. Ziegler 2012 Gift Trust, which are deemed to be beneficially owned by Ms. Ziegler.
Represents shares held by the Ann E. Ziegler IRA Northern Trust Bank, which are deemed to be beneficially owned by Ms. Ziegler.