0001193125-07-148451 DEFA14A 4 20070702 20070702 20070702 CDW CORP 0000899171 5961 363310735 IL 1231 DEFA14A 34 000-21796 07956591 200 N MILWAUKEE AVE VERNON HILLS IL 60061 8474656000 200 N MILWAUKEE AVE VERNON HILLS IL 60061 CDW COMPUTER CENTERS INC 19930322 DEFA14A 1 d8k.htm FORM 8-K EX-2.1 2 dex21.htm AGREEMENT AND PLAN OF MERGER EX-99.1 3 dex991.htm AMENDED AND RESTATED LIMITED GUARANTY EX-99.2 4 dex992.htm LIMITED GUARANTY