Annual report
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Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Delaware ( State or other jurisdiction of incorporation or organization ) 75 Tri - State International Lincolnshire , Illinois ( Address of principal executive offices ) Commission File Number 001-35985 CDW CORPORATION ( Exact name of registrant as specified in its charter ) Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common stock , par value $ 0.01 per share CDW Securities registered pursuant to Section 12 ( g ) of the Act : None ( 847 ) 465-6000 ( Registrant's telephone number , including area code ) None ( Former name , former address and former fiscal year , if changed since last report ) 080 Trading symbol ( s ) CDW 26-0273989 ( I.R.S. Employer Identification No. ) 60069 ( Zip Code ) Name of each exchange on which registered Nasdaq Global Select Market Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . ý Yes Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . No Yes y No Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . ý Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . ý Yes No