SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                   Under the Securities Exchange Act of 1934
                              (Amendment No. 11)*

                          Mentor Graphics Corporation
                                (Name of Issuer)

                        Common Stock, without par value
                         (Title of Class of Securities)

                                   587200106
                                 (CUSIP Number)

                                  Marc Weitzen
                                Icahn Capital LP
                          767 Fifth Avenue, 47th Floor
                            New York, New York 10153
                                 (212) 702-4300
                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)

                               February 15, 2011
            (Date of Event which Requires Filing of this Statement)

If  the filing person has previously filed a statement on Schedule 13G to report
the  acquisition  that  is  the subject of this Schedule 13D, and is filing this
schedule  because  of  Section 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check
the  following  box  /  /.

NOTE:  Schedules  filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 13d-7 for other parties
to  whom  copies  are  to  be  sent.

*The  remainder  of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent  amendment  containing  information  which  would  alter
disclosures  provided  in  a  prior  cover  page.

The information required on the remainder of this cover page shall not be deemed
to  be  "filed"  for the purpose of Section 18 of the Securities Exchange Act of
1934  ("Act") or otherwise subject to the liabilities of that section of the Act
but  shall  be  subject  to  all  other  provisions of the Act (however, see the
Notes).



                                  SCHEDULE 13D

Item 1. Security and Issuer

     The  Schedule  13D filed with the Securities and Exchange Commission on May
27,  2010  (the  "Initial  13D"),  by  the Reporting Persons with respect to the
shares  of  Common  Stock,  without  par  value (the "Shares"), issued by Mentor
Graphics Corporation (the "Issuer"), is hereby amended to furnish the additional
information  set  forth  herein.  All capitalized terms contained herein but not
otherwise  defined shall have the meanings ascribed to such terms in the Initial
13D.

Item 4. Purpose of Transaction.

     Item  4  of  the  Initial  13D  is  hereby  amended  to  add the following:

     On  the  evening  of  February  15,  2011,  Carl  C.  Icahn  and  other
representatives  of  the  Reporting  Persons  had  a  discussion  with the Chief
Executive  Officer and other representatives of Mentor Graphics Corporation (the
"Company")  and  expressed  their belief that shareholder value would be greatly
enhanced if the Company were put up for sale in an open and fair auction process
and  their  belief  that  there would be several interested strategic buyers who
could  pay  a  substantial  premium for the Company. The Company representatives
stated  that  they  would  take  the  matter  under advisement with the board of
directors  and  get  back  to  the  Reporting  Persons.

SECURITY  HOLDERS  ARE  ADVISED  TO READ THE PROXY STATEMENT AND OTHER DOCUMENTS
RELATED  TO THE SOLICITATION OF PROXIES BY CARL C. ICAHN AND HIS AFFILIATES FROM
THE  STOCKHOLDERS  OF  MENTOR  GRAPHICS  CORPORATION  FOR USE AT ITS 2011 ANNUAL
MEETING  WHEN  THEY  BECOME  AVAILABLE  BECAUSE  THEY  WILL  CONTAIN  IMPORTANT
INFORMATION,  INCLUDING  INFORMATION  RELATING TO THE PARTICIPANTS IN SUCH PROXY
SOLICITATION.  WHEN  COMPLETED, A DEFINITIVE PROXY STATEMENT AND A FORM OF PROXY
WILL  BE  MAILED TO STOCKHOLDERS OF MENTOR GRAPHICS CORPORATION AND WILL ALSO BE
AVAILABLE  AT  NO  CHARGE AT THE SECURITIES AND EXCHANGE COMMISSION'S WEBSITE AT
HTTP://WWW.SEC.GOV.




                                   SIGNATURE

     After  reasonable  inquiry  and  to  the  best  of  each of the undersigned
knowledge and belief, each of the undersigned certifies that the information set
forth  in  this  statement  is  true,  complete  and  correct.

Dated:  February  16,  2011


ICAHN  PARTNERS  MASTER  FUND  LP
ICAHN  PARTNERS  MASTER  FUND  II  LP
ICAHN  PARTNERS  MASTER  FUND  III  LP
ICAHN  OFFSHORE  LP
ICAHN  PARTNERS  LP
ICAHN  ONSHORE  LP
BECKTON  CORP.
HOPPER  INVESTMENTS  LLC
BARBERRY  CORP.
HIGH  RIVER  LIMITED  PARTNERSHIP
     By:  Hopper  Investments  LLC,  general  partner

     By:  /s/  Edward  E.  Mattner
          ------------------------
          Name:  Edward  E.  Mattner
          Title:  Authorized  Signatory


ICAHN  CAPITAL  LP
     By:  IPH  GP  LLC,  its  general  partner
     By:  Icahn  Enterprises  Holdings  L.P.,  its  sole  member
By:  Icahn  Enterprises  G.P.  Inc.,  its  general  partner
IPH  GP  LLC
     By:  Icahn  Enterprises  Holdings  L.P.,  its  sole  member
By:  Icahn  Enterprises  G.P.  Inc.,  its  general  partner
ICAHN  ENTERPRISES  HOLDINGS  L.P.
     By:  Icahn  Enterprises  G.P.  Inc.,  its  general  partner
ICAHN  ENTERPRISES  G.P.  INC.

     By:  /s/  Dominick  Ragone
          ---------------------
          Name:  Dominick  Ragone
          Title:  Chief  Financial  Officer




/s/  Carl  C.  Icahn
- --------------------
CARL  C.  ICAHN



         [Signature Page of Schedule 13D - Mentor Graphics Corporation]