X0202 4 2007-12-06 0 0000883241 SYNOPSYS INC SNPS 0001261472 CHILTON JOHN E 700 EAST MIDDLEFIELD ROAD MOUNTAIN VIEW CA 94043 0 1 0 0 Sr. VP & GM Common Stock 2007-12-06 4 A 0 3500 0 A 24009 D Common Stock 2007-12-06 4 F 0 1252 25.06 D 22757 D Restricted Stock Units 0 2007-12-06 4 A 0 14000 0 A 2007-12-06 2010-12-06 Common Stock 14000 14000 D Restricted Stock Units 0 2007-12-06 4 D 0 3500 0 A 2007-12-06 2010-12-06 Common Stock 3500 10500 D Upon vesting each restricted stock unit was converted into an equivalent number of shares of common stock. These shares were retained by the Company in order to meet the tax withholding obligations of the award holder in connection with the vesting of an installment of the performance restricted stock unit award. The Compensation Committee approved the disposition of shares by the award holder and the amount retained by the Company was not in excess of the amount of the tax liability. On 12/06/06 the reporting person was granted Restricted Stock Units the vesting of which was based on satisfaction of certain performance criteria for the fiscal year ending 10/31/07. The performance criteria were met. 25% of the units vest on the date shown followed by three equal annual installments. John Chilton by Stephen Buckhout pursuant to POA 2007-12-10