Reconciliation of Target Operating Results

The following tables reconcile the specific items excluded from GAAP in the calculation of target non-GAAP operating results for the periods indicated below:

GAAP to non-GAAP Reconciliation of First Quarter Fiscal Year 2010 Targets
                  (in thousands, except per share amounts)

                                             Range for Three Months
                                             Ending January 31, 2010
                                              Low              High
Target GAAP expenses                       $269,000          $286,000
Adjustment:
  Estimated impact of amortization of
   intangible assets                        (10,000)          (13,000)
  Estimated impact of stock compensation    (14,000)          (18,000)
Target non-GAAP expenses                   $245,000          $255,000


                                              Range for Three Months
                                              Ending January 31, 2010
                                               Low               High
Target GAAP earnings per share                $0.23             $0.28
Adjustment:
  Estimated impact of amortization of
   intangible assets                           0.09              0.07
  Estimated impact of stock compensation       0.12              0.09
  Net non-GAAP tax effect                     (0.06)            (0.04)
Target non-GAAP earnings per share            $0.38             $0.40

Shares used in non-GAAP calculation
 (midpoint of target range)                 150,500           150,500



        GAAP to Non-GAAP Reconciliation of Fiscal Year 2010 Targets

                                               Range for Fiscal Year
                                              Ending October 31, 2010
                                               Low               High
Target GAAP earnings per share                $1.01             $1.20
Adjustment:
  Estimated impact of amortization of
   intangible assets                           0.33              0.26
  Estimated impact of stock compensation       0.39              0.34
  Net non-GAAP tax effect                     (0.21)            (0.18)
Target non-GAAP earnings per share            $1.52             $1.62

Shares used in non-GAAP calculation
 (midpoint of target range)                 152,500           152,500

Earnings Call Open to Investors

Synopsys will hold a conference call for financial analysts and investors today at 2:00 p.m., Pacific Time. A live webcast of the call will be available at Synopsys' corporate website at www.synopsys.com/ A recording of the call will be available by calling +1-800-475-6701 (+1-320-365-3844 for international callers), access code 122503, beginning at 4:00 p.m. Pacific Time today. A webcast replay will also be available on the website from approximately 5:30 p.m. Pacific Time today through the time Synopsys announces its results for the first quarter fiscal 2010 in February 2010. Synopsys will post copies of the prepared remarks of Aart de Geus, chairman and chief executive officer, and Brian Beattie, chief financial officer, on its website following the call. In addition, Synopsys makes additional financial information available in a financial supplement also posted on the corporate website.

Effectiveness of Information

The targets included in this release, the statements made during the earnings conference call and the information contained in the financial supplement (available in the Investor Relations section of Synopsys' website at www.synopsys.com) represent Synopsys' expectations and beliefs as of the date of this release only. Although this press release, copies of the prepared remarks of the chief executive officer and chief financial officer made during the call and the financial supplement will remain available on Synopsys' website through the date of the first quarter fiscal 2010 earnings call in February 2010, their continued availability through such date does not mean that Synopsys is reaffirming or confirming their continued validity. Synopsys does not currently intend to report on its progress during the first quarter of fiscal 2010 or comment to analysts or investors on, or otherwise update, the targets given in this earnings release.

Availability of Final Financial Statements

Synopsys will include final financial statements for the fourth quarter and full fiscal year in its Annual Report on Form 10-K to be filed by December 30, 2009.