X0303 4 2009-01-08 false 0000813672 CADENCE DESIGN SYSTEMS INC CDNS 0001008463 TAN LIP BU 2655 SEELY AVENUE, BLDG 5 SAN JOSE CA 95134 true true false false President and CEO Common Stock 51000 I By Trust Common Stock 2009-01-08 4 A false 300000 0 A 300000 D Non-Qualified Stock Option (right to buy) 4.12 2009-01-08 4 A false 900000 0 A 2016-01-08 Common Stock 900000 900000 D One quarter of the restricted stock granted to the reporting person will vest on January 8, 2010 and on January 8th of each of the trhee succeeding years, subject to the achievement of performance criteria and certain other conditions. Stock option was granted on January 8, 2009 and vests at a rate of 225,000 shares on January 8, 2010 and 18,750 shares each month thereafter. James J. Cowie, Attorney-in-Fact for Lip-Bu Tan 2009-01-09