SCHEDULE 14A
                   Proxy Statement Pursuant to Section 14(a)
                     of the Securities Exchange Act of 1934
                               (Amendment No. __)


Filed  by  the  Registrant                         [ ]

Filed  by  a  Party  other  than  the  Registrant  [x]

Check  the  appropriate  box:

[ ]   Preliminary  Proxy  Statement
[ ]   Confidential,  for  Use  of  the  Commission Only (as permitted by Rule
      14a-6(e)(2))
[ ]   Definitive  Proxy  Statement
[ ]   Definitive  Additional  Materials
[X]   Soliciting  Material  Pursuant  to   240.14a-12

                          Mentor Graphics Corporation
                (Name of Registrant as Specified In Its Charter)

                               Icahn Partners LP
                         Icahn Partners Master Fund LP
                        Icahn Partners Master Fund II LP
                       Icahn Partners Master Fund III LP
                         High River Limited Partnership
                             Hopper Investments LLC
                                 Barberry Corp.
                                Icahn Onshore LP
                               Icahn Offshore LP
                               Icahn Capital L.P.
                                   IPH GP LLC
                        Icahn Enterprises Holdings L.P.
                          Icahn Enterprises G.P. Inc.
                                 Beckton Corp.
                                 Carl C. Icahn
                                  Brett Icahn
                                David Schechter
                                  Gary Meyers
                               Jose Maria Alapont
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (check the appropriate box):

[X]   No fee required.

[ ]   Fee computed on table below per Exchange Act Rule 14a-6(i)(4) and  0-11.

     1) Title of each class of securities to which transaction applies:

     2) Aggregate number of securities to which transaction applies:

     3) Per unit price or other underlying value of transaction computed
        pursuant to Exchange Act Rule 0-11 (set forth the amount on which the
        filing fee is calculated and state how it was determined):

     4) Proposed maximum aggregate value of transaction:

     5) Total fee paid:


[ ]  Fee  paid  previously  with  preliminary  materials.

[ ]  Check  box if any part of the fee is offset as provided by Exchange Act
     Rule  0-11(a)(2)  and  identify the filing for which the offsetting fee was
     paid previously.  Identify  the  previous filing by registration statement
     number, or the  Form  or  Schedule  and  the  date  of  its  filing.

     1) Amount Previously Paid:

     2) Form, Schedule or Registration Statement No.:

     3) Filing Party:

     4) Date Filed:



On  March  29, 2011, Carl C. Icahn and affiliated entities filed an amendment to
their  Schedule  13D relating to Mentor Graphics Corporation, a copy of which is
filed  herewith  as  Exhibit  1.

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.  INFORMATION  RELATING  TO  THE  PARTICIPANTS  IN SUCH PROXY
SOLICITATION  IS  CONTAINED  IN  THE PRELIMINARY PROXY STATEMENT ON SCHEDULE 14A
FILED  BY  CARL  C.  ICAHN  AND  HIS AFFILIATES WITH THE SECURITIES AND EXCHANGE
COMMISSION  ON  MARCH  17,  2011.




                                                                       EXHIBIT 1


                        Amendment No. 13 to Schedule 13D

                                 [see attached]



                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                   Under the Securities Exchange Act of 1934
                              (Amendment No. 13)*

                          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)

                                 March 29, 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  March  29,  2011,  Carl  C.  Icahn  delivered  a letter to the board of
directors  of  the  Issuer,  a copy of which is filed herewith as an exhibit and
incorporated  herein  by  reference.

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.

Item 6. Contracts, Arrangements, Understandings or Relationship with Respect to
        Securities of the Issuer

     The  information  set  forth  above  in  Item  4  is incorporated herein by
reference.

Item 7. Material to be Filed as Exhibits

     1.   Letter  dated  March  29,  2011,  from  Carl  C. Icahn to the board of
          directors  of  the  Issuer.




                                   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:  March  29,  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]





EXHIBIT A
---------


                             FOR IMMEDIATE RELEASE

                       ICAHN COMMENTS ON MENTOR GRAPHICS

New York, New York, March 29, 2011
Contact: Susan Gordon (212) 702-4309

Carl  C.  Icahn  announced today that the following letter has been delivered to
the  board  of  directors  of  Mentor  Graphics  Corporation:



                                 CARL C. ICAHN
                          767 Fifth Avenue, 47th Floor
                            New York, New York 10153


                                   March 29, 2011

VIA FEDERAL EXPRESS AND EMAIL
-----------------------------

Board of Directors
Mentor Graphics Corporation
8005 S.W. Boeckman Road
Wilsonville, OR 97070-7777

Gentlemen and Ladies:

     In  the  dark  of night, just one day after its Board rejected our offer of
$17  per  share,  on  March  29, 2011, the Company announced that it is going to
offer  to  sell, in a private placement to institutional investors, between $220
and  $253  million  of  convertible  debt.  This  news should outrage our fellow
shareholders  as  it  does  us.

     The continual dilution of the Mentor Graphics common stockholder appears to
be  business  as  usual  for the Company. On the one hand, the Company indicates
that  the  price  that we offered as a stalking horse bid for the Company is far
too  low  and a sale of the Company to a strategic acquirer is too risky; on the
other hand, it is choosing to issue securities convertible into stock that would
dilute  shareholders  and make a tender offer or other acquisition proposal by a
potential  acquirer  a  great  deal  more  difficult  to  accomplish.

     The real question is why is the Board doing this? Considering the Company's
earnings  forecast for its next fiscal year of $1.00 per share, we don't believe
it  is in the interest of stockholders to potentially issue more shares pursuant
to  this  refinancing  process  and dilute shareholders. The Company should have
used  its  earnings to retire this debt or, to the extent insufficient, borrowed
money without any conversion features. This is an example of why the composition
of the Board cries out for new blood - members who consider what is best for our
fellow  shareholders  and  are  not  satisfied  with  the  status  quo.

     Why  would the Company do this? For the last seventeen years, the Company's
share price has been in the doldrums. Walden Rhines has pocketed seventeen years
of  salaries  and bonuses and the longstanding members of the Board of Directors
have been unchallenged and keep re-nominating themselves and getting elected. It
looks  as  though  they are trying to ensure that they can keep the country club
going  for  the  next seventeen years while the shareholders may face continuing
dilutive  issuances  by  the  Company.

     We  strongly  protest  what  you  are  doing.  We  have  heard  from  other
shareholders  outraged  by  your  convertible  debt  proposal.  We encourage the
existing Board of Directors to act in the interest of shareholders and drop this
proposal and not enter into any financing that will act to derail an acquisition
proposal.  After seventeen years of a stock that has done nothing, isn't it time
for  the shareholders to be given every opportunity to determine if they want to
sell  their  company  rather  than  to  have  these  opportunities  sabotaged?

                                   Very truly yours,


                                   Carl C. Icahn



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.  INFORMATION  RELATING  TO  THE  PARTICIPANTS  IN SUCH PROXY
SOLICITATION  IS  CONTAINED  IN  THE PRELIMINARY PROXY STATEMENT ON SCHEDULE 14A
FILED  BY  CARL  C.  ICAHN  AND  HIS AFFILIATES WITH THE SECURITIES AND EXCHANGE
COMMISSION  ON  MARCH  17,  2011.