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
    (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 February 8, 2010, Carl C. Icahn and affiliated entities filed an amendment to
their  Schedule  13D  relating  to  Mentor Graphics Corporation disclosing their
intention  to  nominate individuals for election as directors at the 2011 annual
meeting,  a  copy  of  which  is  filed  herewith  as  Exhibit  2.

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  EXHIBIT  1  HERETO.




                                                                       EXHIBIT 1

                                  PARTICIPANTS

     The  participants  in  the solicitation of proxies (the "Participants") may
include  the  following:  Icahn Partners LP ("Icahn Partners"), Icahn Onshore LP
("Icahn  Onshore"),  Icahn  Partners  Master  Fund  LP  ("Icahn  Master"), Icahn
Partners  Master  Fund II LP ("Icahn Master II"), Icahn Partners Master Fund III
LP  ("Icahn Master III"), Icahn Offshore LP ("Icahn Offshore"), Icahn Capital LP
("Icahn  Capital"),  IPH GP LLC ("IPH"), Icahn Enterprises Holdings L.P. ("Icahn
Enterprises  Holdings"),  Icahn  Enterprises G.P. Inc. ("Icahn Enterprises GP"),
Beckton Corp. ("Beckton"), High River Limited Partnership ("High River"), Hopper
Investments  LLC ("Hopper"), Barberry Corp. ("Barberry"), Mr. Carl C. Icahn, Mr.
Brett  Icahn  and  Mr.  David  S.  Schechter.

     Icahn  Partners,  Icahn  Master, Icahn Master II, Icahn Master III and High
River  (collectively,  the  "Icahn  Parties") are entities controlled by Carl C.
Icahn. Brett Icahn and David S. Schechter are employees of the Icahn Parties who
may  also  participate  in  soliciting  proxies  from the stockholders of Mentor
Graphics Corporation (the "Issuer"). Neither Brett Icahn nor David Schechter own
beneficially  any interest in securities of the Issuer, and will not receive any
special  compensation  in  connection  with  such  solicitation.

     Icahn Partners is a Delaware limited partnership principally engaged in the
business  of  investing  in  securities.  Icahn  Onshore,  a  Delaware  limited
partnership,  is  the  general  partner of Icahn Partners. Each of Icahn Master,
Icahn  Master  II  and  Icahn  Master  III  is a Cayman Islands exempted limited
partnership  principally  engaged  in  the  business of investing in securities.
Icahn  Offshore,  a Delaware limited partnership, is the general partner of each
of Icahn Master, Icahn Master II and Icahn Master III. Icahn Capital, a Delaware
limited  partnership,  is the general partner of each of Icahn Onshore and Icahn
Offshore.  IPH,  a Delaware limited liability company, is the general partner of
Icahn  Capital.  Icahn  Enterprises Holdings, a Delaware limited partnership, is
the  sole  member  of  IPH. Icahn Enterprises GP, a Delaware corporation, is the
general  partner of Icahn Enterprises Holdings. Beckton, a Delaware corporation,
is  the  sole  stockholder  of  Icahn  Enterprises  GP. High River is a Delaware
limited  partnership  principally  engaged  in  the  business  of  investing  in
securities. Hopper, a Delaware limited liability company, is the general partner
of  High  River.  Barberry,  a  Delaware  corporation, is the managing member of
Hopper.  Each  of  Beckton  and  Barberry  is wholly owned by Carl C. Icahn. Mr.
Icahn,  through  his ownership of Beckton and Barberry, indirectly controls each
of  the  Icahn  Parties.

     Brett  Icahn  and  David  S.  Schechter  are  employees  and/or officers or
directors  of  the  Icahn  Parties  and various other entities controlled by Mr.
Icahn.  In connection with their employment by Icahn Capital LP, Brett Icahn and
David  Schechter each has a participatory interest in the profits derived by its
affiliated  entities  from  their investment in certain companies, including the
Issuer.  The participatory interests of Messrs. Icahn and Schechter entitle them
each  to  5.1% of the aggregate profits from such investments after an 8% hurdle
rate  is  achieved.

     Mr.  Icahn,  through  his control of the Icahn Parties, may be deemed to be
the  indirect  beneficial  owner  of  16,120,289  shares  of common stock of the
Issuer,  without  par value ("Shares"), which represents approximately 14.70% of
the  outstanding  Shares  as  of  the  date  hereof.

     High  River has sole voting power and sole dispositive power with regard to
3,224,057 Shares. Each of Hopper, Barberry and Mr. Icahn has shared voting power
and  shared  dispositive power with regard to such Shares. Icahn Master has sole
voting power and sole dispositive power with regard to 5,568,678 Shares. Each of
Icahn  Offshore,  Icahn  Capital,  IPH,  Icahn  Enterprises  Holdings,  Icahn
Enterprises  GP,  Beckton  and  Mr.  Icahn  has  shared  voting power and shared
dispositive  power  with  regard to such Shares. Icahn Master II has sole voting
power  and sole dispositive power with regard to 1,632,955 Shares. Each of Icahn
Offshore,  Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP,
Beckton  and Mr. Icahn has shared voting power and shared dispositive power with
regard  to  such  Shares.  Icahn  Master  III  has  sole  voting  power and sole
dispositive  power  with regard to 786,410 Shares. Each of Icahn Offshore, Icahn
Capital,  IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr.
Icahn  has  shared voting power and shared dispositive power with regard to such
Shares.  Icahn  Partners  has  sole voting power and sole dispositive power with
regard  to  4,908,189  Shares.  Each of Icahn Onshore, Icahn Capital, IPH, Icahn
Enterprises  Holdings,  Icahn  Enterprises  GP, Beckton and Mr. Icahn has shared
voting  power  and  shared  dispositive  power  with  regard  to  such  Shares.

     Each of Hopper, Barberry and Mr. Icahn, by virtue of their relationships to
High  River,  may be deemed to indirectly beneficially own the Shares which High
River  directly  beneficially  owns.  Each of Icahn Onshore, Icahn Capital, IPH,
Icahn  Enterprises  Holdings,  Icahn  Enterprises  GP, Beckton and Mr. Icahn, by
virtue  of  their  relationships  to Icahn Partners, may be deemed to indirectly
beneficially  own  the  Shares  which Icahn Partners directly beneficially owns.
Each  of  Icahn  Offshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn
Enterprises GP, Beckton and Mr. Icahn, by virtue of their relationships to Icahn
Master,  Icahn  Master  II  and  Icahn  Master  III, may be deemed to indirectly
beneficially own the Shares which Icahn Master, Icahn Master II and Icahn Master
III  directly  beneficially  own.




                                                                       EXHIBIT 2


                        Amendment No. 8 to Schedule 13D

                                 [see attached]



                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                   Under the Securities Exchange Act of 1934
                               (Amendment No. 8)*

                          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 8, 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

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      High  River  Limited  Partnership

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      3,224,057

8   SHARED  VOTING  POWER
      0

9   SOLE  DISPOSITIVE  POWER
      3,224,057

10  SHARED  DISPOSITIVE  POWER
      0

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      3,224,057

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      2.94%

14  TYPE  OF  REPORTING  PERSON
      PN



                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Hopper  Investments  LLC

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      0

8   SHARED  VOTING  POWER
      3,224,057

9   SOLE  DISPOSITIVE  POWER
      0

10  SHARED  DISPOSITIVE  POWER
      3,224,057

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      3,224,057

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      2.94%

14  TYPE  OF  REPORTING  PERSON
      OO




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Barberry  Corp.

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      0

8   SHARED  VOTING  POWER
      3,224,057

9   SOLE  DISPOSITIVE  POWER
      0

10  SHARED  DISPOSITIVE  POWER
      3,224,057

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      3,224,057

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      2.94%

14  TYPE  OF  REPORTING  PERSON
      CO




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Icahn  Partners  Master  Fund  LP

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Cayman  Islands

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      5,568,678

8   SHARED  VOTING  POWER
      0

9   SOLE  DISPOSITIVE  POWER
      5,568,678

10  SHARED  DISPOSITIVE  POWER
      0

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      5,568,678

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      5.08%

14  TYPE  OF  REPORTING  PERSON
      PN




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Icahn  Partners  Master  Fund  II  LP

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Cayman  Islands

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      1,632,955

8   SHARED  VOTING  POWER
      0

9   SOLE  DISPOSITIVE  POWER
      1,632,955

10  SHARED  DISPOSITIVE  POWER
      0

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      1,632,955

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      1.49%

14  TYPE  OF  REPORTING  PERSON
      PN




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Icahn  Partners  Master  Fund  III  LP

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Cayman  Islands

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      786,410

8   SHARED  VOTING  POWER
      0

9   SOLE  DISPOSITIVE  POWER
      786,410

10  SHARED  DISPOSITIVE  POWER
      0

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      786,410

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      0.72%

14  TYPE  OF  REPORTING  PERSON
      PN



                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Icahn  Offshore  LP

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      0

8   SHARED  VOTING  POWER
      7,988,043

9   SOLE  DISPOSITIVE  POWER
      0

10  SHARED  DISPOSITIVE  POWER
      7,988,043

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      7,988,043

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      7.28%

14  TYPE  OF  REPORTING  PERSON
      PN




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Icahn  Partners  LP

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      4,908,189

8   SHARED  VOTING  POWER
      0

9   SOLE  DISPOSITIVE  POWER
      4,908,189

10  SHARED  DISPOSITIVE  POWER
      0

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      4,908,189

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      4.48%

14  TYPE  OF  REPORTING  PERSON
      PN




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Icahn  Onshore  LP

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      0

8   SHARED  VOTING  POWER
      4,908,189

9   SOLE  DISPOSITIVE  POWER
      0

10  SHARED  DISPOSITIVE  POWER
      4,908,189

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      4,908,189

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      4.48%

14  TYPE  OF  REPORTING  PERSON
      PN




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Icahn  Capital  LP

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      0

8   SHARED  VOTING  POWER
      12,896,232

9   SOLE  DISPOSITIVE  POWER
      0

10  SHARED  DISPOSITIVE  POWER
      12,896,232

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      12,896,232

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      11.76%

14  TYPE  OF  REPORTING  PERSON
      PN




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      IPH  GP  LLC

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      0

8   SHARED  VOTING  POWER
      12,896,232

9   SOLE  DISPOSITIVE  POWER
      0

10  SHARED  DISPOSITIVE  POWER
      12,896,232

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      12,896,232

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      11.76%

14  TYPE  OF  REPORTING  PERSON
      OO




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Icahn  Enterprises  Holdings  L.P.

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      0

8   SHARED  VOTING  POWER
      12,896,232

9   SOLE  DISPOSITIVE  POWER
      0

10  SHARED  DISPOSITIVE  POWER
      12,896,232

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      12,896,232

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      11.76%

14  TYPE  OF  REPORTING  PERSON
      PN




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Icahn  Enterprises  G.P.  Inc.

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      0

8   SHARED  VOTING  POWER
      12,896,232

9   SOLE  DISPOSITIVE  POWER
      0

10  SHARED  DISPOSITIVE  POWER
      12,896,232

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      12,896,232

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      11.76%

14  TYPE  OF  REPORTING  PERSON
      CO




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Beckton  Corp.

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS
      WC

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      0

8   SHARED  VOTING  POWER
      12,896,232

9   SOLE  DISPOSITIVE  POWER
      0

10  SHARED  DISPOSITIVE  POWER
      12,896,232

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      12,896,232

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      11.76%

14  TYPE  OF  REPORTING  PERSON
      CO




                                  SCHEDULE 13D

CUSIP No. 587200106

1   NAME  OF  REPORTING  PERSON
      Carl  C.  Icahn

2   CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP
      (a) / /
      (b) / /

3   SEC  USE  ONLY

4   SOURCE  OF  FUNDS

5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
    2(d)  or  2(e)     /  /

6   CITIZENSHIP  OR  PLACE  OF  ORGANIZATION
      United  States  of  America

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7   SOLE  VOTING  POWER
      0

8   SHARED  VOTING  POWER
      16,120,289

9   SOLE  DISPOSITIVE  POWER
      0

10  SHARED  DISPOSITIVE  POWER
      16,120,289

11  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
      16,120,289

12  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES    / /

13  PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
      14.70%

14  TYPE  OF  REPORTING  PERSON
      IN




                                  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 3. Source and Amount of Funds or Other Consideration

     Item 3 of the Initial 13D is hereby amended and restated in its entirety as
follows:

     The  Reporting  Persons  hold,  in  the  aggregate,  16,120,289 Shares. The
aggregate  purchase  price  of  the  Shares  purchased  by the Reporting Persons
collectively  was  $146,433,694  (including  commissions  and  premiums  for the
options  to  purchase  Shares).  The source of funding for the purchase of these
Shares  was the general working capital of the respective purchasers. The Shares
are  held  by  the  Reporting  Persons  in  margin  accounts together with other
securities. Such margin accounts may from time to time have debit balances. Part
of  the  purchase  price  of  the  Shares purchased by the Reporting Persons was
obtained  through  margin  borrowing. As of the close of business on February 7,
2011,  the  indebtedness  of  (i)  High River's margin account was approximately
$767,237,936,  (ii)  Icahn  Partners'  margin  account  was  approximately
$577,082,565,  (iii)  Icahn  Master's  margin  account  was  approximately
$756,279,432,  (iv)  Icahn  Master  II's  margin  account  was  approximately
$285,031,934,  and  (v)  Icahn  Master  III's  margin  account was approximately
$66,422,893.

Item 4. Purpose of Transaction.

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

     Mentor  Graphics  Corporation  (the "Company") on Friday, February 4, 2010,
announced  that  it  will hold its 2011 annual meeting of shareholders six weeks
earlier  than  last  year, and left shareholders with only 10 days to nominate a
dissident  slate. We, at that time, called the Company and stated that, in light
of  our  prior friendly discussions, we viewed the announcement as a hostile and
unprovoked  defensive tactic intended to impede shareholder rights. We asked the
Company  to  rescind  the  announcement,  which  it  refused to do. We therefore
currently  intend to nominate three individuals for election as directors of the
Company  at  the  2011  annual  meeting,  but  reserve  the  right to nominate a
different  number  of  individuals,  up to a full slate. We intend to notify the
Company  as  to  the  composition  of  our  slate  prior  to  the  new deadline.

     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 5. Interest in Securities of the Issuer

     Item 5 of the Initial 13D is hereby amended and restated in its entirety as
follows:

     (a)  The  Reporting  Persons  may  be  deemed  to  beneficially own, in the
aggregate,  16,120,289 Shares, representing approximately 14.70% of the Issuer's
outstanding  Shares  (based upon the 109,672,191 Shares stated to be outstanding
as  of  December  3, 2010 by the Issuer in the Issuer's quarterly report on Form
10-Q  filed  with  the  Securities and Exchange Commission on December 7, 2010).

     (b) High River has sole voting power and sole dispositive power with regard
to  3,224,057  Shares.  Each of Hopper, Barberry and Mr. Icahn has shared voting
power  and shared dispositive power with regard to such Shares. Icahn Master has
sole  voting  power  and sole dispositive power with regard to 5,568,678 Shares.
Each  of  Icahn  Offshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn
Enterprises  GP,  Beckton  and  Mr.  Icahn  has  shared  voting power and shared
dispositive  power  with  regard to such Shares. Icahn Master II has sole voting
power  and sole dispositive power with regard to 1,632,955 Shares. Each of Icahn
Offshore,  Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP,
Beckton  and Mr. Icahn has shared voting power and shared dispositive power with
regard  to  such  Shares.  Icahn  Master  III  has  sole  voting  power and sole
dispositive  power  with regard to 786,410 Shares. Each of Icahn Offshore, Icahn
Capital,  IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr.
Icahn  has  shared voting power and shared dispositive power with regard to such
Shares.  Icahn  Partners  has  sole voting power and sole dispositive power with
regard  to  4,908,189  Shares.  Each of Icahn Onshore, Icahn Capital, IPH, Icahn
Enterprises  Holdings,  Icahn  Enterprises  GP, Beckton and Mr. Icahn has shared
voting  power  and  shared  dispositive  power  with  regard  to  such  Shares.

     Each of Hopper, Barberry and Mr. Icahn, by virtue of their relationships to
High  River  (as  disclosed in Item 2), may be deemed to indirectly beneficially
own  (as that term is defined in Rule 13d-3 under the Act) the Shares which High
River  directly  beneficially  owns.  Each  of  Hopper,  Barberry  and Mr. Icahn
disclaims  beneficial  ownership  of such Shares for all other purposes. Each of
Icahn  Offshore,  Icahn  Capital,  IPH,  Icahn  Enterprises  Holdings,  Icahn
Enterprises  GP, Beckton and Mr. Icahn, by virtue of their relationships to each
of  Icahn Master, Icahn Master II and Icahn Master III (as disclosed in Item 2),
may  be  deemed  to indirectly beneficially own (as that term is defined in Rule
13d-3  under the Act) the Shares which each of Icahn Master, Icahn Master II and
Icahn  Master  III  directly  beneficially  owns.  Each of Icahn Offshore, Icahn
Capital,  IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr.
Icahn disclaims beneficial ownership of such Shares for all other purposes. Each
of  Icahn  Onshore,  Icahn  Capital,  IPH,  Icahn  Enterprises  Holdings,  Icahn
Enterprises GP, Beckton and Mr. Icahn, by virtue of their relationships to Icahn
Partners  (as disclosed in Item 2), may be deemed to indirectly beneficially own
(as  that  term  is  defined in Rule 13d-3 under the Act) the Shares which Icahn
Partners  directly beneficially owns. Each of Icahn Onshore, Icahn Capital, IPH,
Icahn  Enterprises  Holdings,  Icahn  Enterprises  GP,  Beckton  and  Mr.  Icahn
disclaims  beneficial  ownership  of  such  Shares  for  all  other  purposes.

     (c)  There  were no transactions with respect to the Shares effected by the
Reporting  Persons  during  the  past  sixty  days.




                                   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  8,  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]