X0201 4 2004-02-02 0000899171 CDW CORP CDWC 0001227855 ROUHSELANG SANDRA M 200 NORTH MILWAUKEE AVENUE VERNON HILLS IL 60061 0 1 0 0 VP & Controller Common Stock, $.01 par value 2004-02-02 4 M 0 817 23.985 A 1511.681 D Common Stock, $.01 par value 2004-02-02 4 M 0 703 39.313 A 2214.681 D Common Stock, $.01 par value 2004-02-02 4 M 0 680 .005 A 2894.681 D Common Stock, $.01 par value 2004-02-02 4 S 0 330 68.72 D 2564.681 D Common Stock, $.01 par value 2004-02-02 4 S 0 500 68.73 D 2064.681 D Common Stock, $.01 par value 2004-02-02 4 S 0 800 68.77 D 1264.681 D Common Stock, $.01 par value 2004-02-02 4 S 0 100 68.78 D 1164.681 D Common Stock, $.01 par value 2004-02-02 4 S 0 100 68.79 D 1064.681 D Common Stock, $.01 par value 2004-02-02 4 S 0 100 68.83 D 964.681 D Common Stock, $.01 par value 2004-02-02 4 S 0 270 68.84 D 694.681 D Stock Options (Right to Buy) 23.985 2004-02-02 5 M 0 817 0 D 2001-12-31 2018-12-31 Common Stock, $.01 par value 817 4088 D Stock Options (Right to Buy) 39.313 2004-02-02 5 M 0 703 0 D 2002-12-31 2019-12-31 Common Stock, $.01 par value 703 4220 D Stock Options (Right to Buy) .005 2004-02-02 5 M 0 680 0 D 2004-02-01 2019-12-31 Common Stock, $.01 par value 680 0 D Stock Options (Right to Buy) 68.00 2004-02-02 5 A 0 7300 0 A 2005-02-02 2014-02-02 Common Stock, $.01 par value 7300 7300 D Robert J. Welyki, Attorney-in-fact 2004-02-02