1、UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington,D.C.20549FORM 10-KAs filed on December 17,2010 and amended on February 9,2011(Mark One)ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934For the year ended October 31,2010OR TRANSITION REPORT PURSUANT TO SECTI
2、ON 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934For the transition periodfrom toCommission File Number 0-19807SYNOPSYS,INC.(Exact name of registrant as specified in its charter)Delaware56-1546236(State or other jurisdiction ofincorporation or organization)(I.R.S.EmployerIdentification No.)700 Ea
3、st Middlefield Road,Mountain View,California 94043(Address of principal executive offices,including zip code)(650)584-5000(Registrants telephone number,including area code)Securities Registered Pursuant to Section 12(b)of the Act:Title of Each ClassName of Each Exchange on Which RegisteredCommon Sto
4、ck,$0.01 par valueNASDAQ Global Select MarketSecurities Registered Pursuant to Section 12(g)of the Act:NoneIndicate by check mark if the registrant is a well-known seasoned issuer,as defined in Rule 405 of the Securities Act.Yes No Indicate by check mark if the registrant is not required to file rep
5、orts pursuant to Section 13 or Section 15(d)of the Act.Yes No Indicate by check mark whether the registrant(1)has filed all reports required to be filed by Section 13 or 15(d)of the SecuritiesExchange Act of 1934 during the preceding 12 months(or for such shorter period that the registrant was requi
6、red to file suchreports),and(2)has been subject to such filing requirements for the past 90 days.Yes No Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site,if any,everyInteractive Data File required to be submitted and posted pursuant to Ru