SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

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

                          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)

                                  May 17, 2010
            (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
          1,463,764

8     SHARED  VOTING  POWER
     0

9     SOLE  DISPOSITIVE  POWER
     1,463,764

10     SHARED  DISPOSITIVE  POWER
     0

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     1,463,764

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          1.37%

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
     1,463,764

9     SOLE  DISPOSITIVE  POWER
     0

10     SHARED  DISPOSITIVE  POWER
     1,463,764

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     1,463,764

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          1.37%

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
     1,463,764

9     SOLE  DISPOSITIVE  POWER
     0

10     SHARED  DISPOSITIVE  POWER
     1,463,764

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     1,463,764

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          1.37%

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
     2,512,189

8     SHARED  VOTING  POWER
     0

9     SOLE  DISPOSITIVE  POWER
     2,512,189

10     SHARED  DISPOSITIVE  POWER
     0

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     2,512,189

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          2.35%

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
     879,444

8     SHARED  VOTING  POWER
     0

9     SOLE  DISPOSITIVE  POWER
     879,444

10     SHARED  DISPOSITIVE  POWER
     0

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     879,444

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          0.82%

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
     331,801

8     SHARED  VOTING  POWER
     0

9     SOLE  DISPOSITIVE  POWER
     331,801

10     SHARED  DISPOSITIVE  POWER
     0

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     331,801

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          0.31%

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
     3,723,434

9     SOLE  DISPOSITIVE  POWER
     0

10     SHARED  DISPOSITIVE  POWER
     3,723,434

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     3,723,434

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          3.49%

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
     2,131,625

8     SHARED  VOTING  POWER
     0

9     SOLE  DISPOSITIVE  POWER
     2,131,625

10     SHARED  DISPOSITIVE  POWER
     0

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     2,131,625

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          2.00%

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
     2,131,625

9     SOLE  DISPOSITIVE  POWER
     0

10     SHARED  DISPOSITIVE  POWER
     2,131,625

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     2,131,625

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          2.00%

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
     5,855,059

9     SOLE  DISPOSITIVE  POWER
     0

10     SHARED  DISPOSITIVE  POWER
     5,855,059

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     5,855,059

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          5.49%

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
     5,855,059

9     SOLE  DISPOSITIVE  POWER
     0

10     SHARED  DISPOSITIVE  POWER
     5,855,059

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     5,855,059

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          5.49%

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
     5,855,059

9     SOLE  DISPOSITIVE  POWER
     0

10     SHARED  DISPOSITIVE  POWER
     5,855,059

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     5,855,059

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          5.49%

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
     5,855,059

9     SOLE  DISPOSITIVE  POWER
     0

10     SHARED  DISPOSITIVE  POWER
     5,855,059

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     5,855,059

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          5.49%

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
     5,855,059

9     SOLE  DISPOSITIVE  POWER
     0

10     SHARED  DISPOSITIVE  POWER
     5,855,059

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     5,855,059

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          5.49%

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
     7,318,823

9     SOLE  DISPOSITIVE  POWER
     0

10     SHARED  DISPOSITIVE  POWER
     7,318,823

11     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON
     7,318,823

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

13     PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)
          6.86%

14     TYPE  OF  REPORTING  PERSON
     IN


                                  SCHEDULE 13D

Item 1. Security and Issuer

     This  statement  relates  to  the  Common  Stock,  without  par  value (the
"Shares"),  issued by Mentor Graphics Corporation (the "Issuer"). The address of
the  principal  executive  offices  of  the  Issuer  is 8005 S.W. Boeckman Road,
Wilsonville,  Oregon  97070-7777.

Item 2. Identity and Background

     The persons filing this statement are High River Limited Partnership ("High
River"),  Hopper  Investments LLC ("Hopper"), Barberry Corp. ("Barberry"), 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 Partners LP ("Icahn Partners"),
Icahn  Onshore  LP ("Icahn Onshore"), 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"),
and  Carl C. Icahn, a citizen of the United States of America (collectively, the
"Reporting  Persons").

     The principal business address of each of (i) High River, Hopper, Barberry,
Icahn  Offshore,  Icahn  Partners,  Icahn  Onshore,  Icahn  Capital,  IPH, Icahn
Enterprises  Holdings,  Icahn  Enterprises GP and Beckton is White Plains Plaza,
445  Hamilton  Avenue  -  Suite 1210, White Plains, NY 10601, (ii) Icahn Master,
Icahn Master II and Icahn Master III is c/o Walkers SPV Limited, P.O. Box 908GT,
87  Mary  Street, George Town, Grand Cayman, Cayman Islands, and (iii) Mr. Icahn
is c/o Icahn Associates Corp., 767 Fifth Avenue, 47th Floor, New York, NY 10153.

     Barberry is the sole member of Hopper, which is the general partner of High
River.  Icahn  Offshore  is  the  general partner of each of Icahn Master, Icahn
Master  II  and  Icahn Master III. Icahn Onshore is the general partner of Icahn
Partners.  Icahn  Capital  is  the general partner of each of Icahn Offshore and
Icahn  Onshore.  Icahn  Enterprises Holdings is the sole member of IPH, which is
the  general  partner of Icahn Capital. Beckton is the sole stockholder of Icahn
Enterprises GP, which is the general partner of Icahn Enterprises Holdings. Carl
C.  Icahn  is the sole stockholder of each of Barberry and Beckton. As such, Mr.
Icahn  is  in  a  position  indirectly  to  determine  the investment and voting
decisions  made  by each of the Reporting Persons. In addition, Mr. Icahn is the
indirect  holder  of  approximately  92.3%  of  the outstanding depositary units
representing  limited  partnership  interests  in Icahn Enterprises L.P. ("Icahn
Enterprises"). Icahn Enterprises GP is the general partner of Icahn Enterprises,
which  is  the  sole  limited  partner  of  Icahn  Enterprises  Holdings.

     Each  of  High  River  and Barberry is primarily engaged in the business of
investing  in securities. Hopper is primarily engaged in the business of serving
as  the  general  partner  of High River. Each of Icahn Master, Icahn Master II,
Icahn  Master  III  and  Icahn  Partners is primarily engaged in the business of
investing  in securities. Icahn Offshore is primarily engaged in the business of
serving  as  the  general  partner  of each of Icahn Master, Icahn Master II and
Icahn  Master III. Icahn Onshore is primarily engaged in the business of serving
as  the general partner of Icahn Partners. Icahn Capital is primarily engaged in
the  business  of  serving  as the general partner of each of Icahn Offshore and
Icahn  Onshore.  IPH  is  primarily  engaged  in  the business of serving as the
general  partner  of  Icahn  Capital.  Icahn  Enterprises  Holdings is primarily
engaged  in  the  business  of  holding  direct or indirect interests in various
operating  businesses. Icahn Enterprises GP is primarily engaged in the business
of  serving  as  the  general  partner  of  each  of Icahn Enterprises and Icahn
Enterprises  Holdings.  Beckton  is primarily engaged in the business of holding
the  capital  stock  of  Icahn  Enterprises  GP.

     Carl  C.  Icahn's  present principal occupation or employment is serving as
(i)  Chief  Executive  Officer of Icahn Capital LP, a wholly owned subsidiary of
Icahn  Enterprises,  through  which Mr. Icahn manages various private investment
funds,  including Icahn Partners, Icahn Master, Icahn Master II and Icahn Master
III,  (ii) Chairman of the Board of Icahn Enterprises GP, the general partner of
Icahn  Enterprises, a New York Stock Exchange listed diversified holding company
engaged  in  a  variety  of businesses, including investment management, metals,
real  estate and home fashion, and (iii) Chairman of the Board and a director of
Starfire  Holding  Corporation  ("Starfire"),  a  holding company engaged in the
business  of  investing in and/or holding securities of various entities, and as
Chairman  of  the  Board  and  a director of various of Starfire's subsidiaries.

     The  name,  citizenship,  present  principal  occupation  or employment and
business address of each director and executive officer of the Reporting Persons
are  set  forth  in  Schedule  A  attached  hereto.

     None  of  the Reporting Persons nor any manager or executive officer of the
Reporting  Persons,  has,  during  the  past five years, (a) been convicted in a
criminal  proceeding  (excluding traffic violations or similar misdemeanors), or
(b)  been  a party to a civil proceeding of a judicial or administrative body of
competent jurisdiction and as a result of such proceeding was or is subject to a
judgment,  decree or final order enjoining future violations of, or prohibiting,
or  mandating  activities  subject  to,  Federal  or  State securities laws or a
finding  of  any  violation  with  respect  to  such  laws.

Item 3. Source and Amount of Funds or Other Consideration

     The  Reporting  Persons  hold,  in  the  aggregate,  7,318,823  Shares. The
aggregate  purchase  price  of  the  Shares  purchased  by the Reporting Persons
collectively  was $65,332,001 (including commissions). 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  May  26, 2010, the indebtedness of (i) High River's margin account
was  approximately  $397,874,408,  (ii)  Icahn  Partners'  margin  account  was
approximately  $135,664,638,  (iii)  Icahn  Master's  margin  account  was
approximately  $190,984,422,  (iv)  Icahn  Master  II's  margin  account  was
approximately  $53,667,537,  and  (v)  Icahn  Master  III's  margin  account was
approximately  $27,580,005.

Item 4. Purpose of Transaction

     The  Reporting  Persons  acquired  the Shares in the belief that the Shares
were  undervalued.  The  Reporting  Persons intend to seek to have conversations
with  management  of  the  Issuer  to discuss the business and operations of the
Issuer  and  the  maximization  of  shareholder  value.

     The  Reporting  Persons  may,  from  time  to time and at any time, acquire
additional  Shares  and/or  other  equity,  debt,  notes,  instruments  or other
securities of the Issuer or its subsidiaries (collectively, "Securities") in the
open  market or otherwise. The Reporting Persons reserve the right to dispose of
any  or all of their Securities in the open market or otherwise, at any time and
from  time  to  time,  and to engage in any hedging or similar transactions with
respect  to  the  Securities.

Item 5. Interest in Securities of the Issuer

     (a)  The  Reporting  Persons  may  be  deemed  to  beneficially own, in the
aggregate,  7,318,823  Shares,  representing approximately 6.86% of the Issuer's
outstanding  Shares  (based upon the 106,690,195 Shares stated to be outstanding
as  of  May  3,  2010  by the Issuer in the Issuer's preliminary proxy statement
filed  with  the  Securities  and  Exchange  Commission  on  May  5,  2010).

     (b) High River has sole voting power and sole dispositive power with regard
to  1,463,764  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 2,512,189 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 879,444 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 331,801 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  2,131,625  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)  The following table sets forth all transactions with respect to Shares
effected during the past sixty (60) days by any of the Reporting Persons. Except
as  otherwise  noted  below,  all  such  transactions  were  purchases of Shares
effected  in  the  open  market,  and the table includes commissions paid in per
share  prices.


Name of                     Date                  No. of               Purchase
Reporting                   of                    Shares               Price Per
Person                      Transaction           Purchased            Share
- ---------                   -----------           ---------            ---------
High River                   04/07/2010             56,020                8.23
High River                   04/08/2010             27,880                8.26
High River                   04/09/2010             80,000                8.59
High River                   04/12/2010             29,640                8.99
High River                   04/13/2010             60,000                9.20
High River                   04/14/2010             66,800                9.46
High River                   04/15/2010             20,800                9.45
High River                   04/16/2010             40,000                9.33
High River                   04/19/2010             27,860                9.32
High River                   04/20/2010             12,820                9.39
High River                   04/21/2010             28,840                9.41
High River                   04/22/2010             70,000                9.34
High River                   04/23/2010             23,040                9.44
High River                   04/26/2010             37,140                9.51
High River                   04/27/2010             44,740                9.23
High River                   04/28/2010             31,000                9.06
High River                   04/29/2010             39,520                9.30
High River                   04/30/2010             35,240                9.14
High River                   05/03/2010             20,000                9.20
High River                   05/04/2010             40,000                8.88
High River                   05/05/2010             36,860                8.79
High River                   05/06/2010             34,820                8.48
High River                   05/07/2010             40,000                8.17
High River                   05/10/2010             25,820                8.57
High River                   05/11/2010             32,400                8.64
High River                   05/12/2010             34,500                8.80
High River                   05/13/2010             38,840                9.12
High River                   05/14/2010             26,240                8.93
High River                   05/17/2010             43,387                8.92
High River                   05/18/2010             56,400                9.00
High River                   05/19/2010             57,520                8.96
High River                   05/20/2010             60,000                8.70
High River                   05/21/2010             41,720                8.61
High River                   05/24/2010             32,660                8.58
High River                   05/25/2010             38,120                8.30
High River                   05/26/2010             34,102                8.62
High River                   05/27/2010             39,035                8.92

Icahn Partners               04/07/2010             82,225                8.23
Icahn Partners               04/08/2010             40,921                8.26
Icahn Partners               04/09/2010            117,422                8.59
Icahn Partners               04/12/2010             43,505                8.99
Icahn Partners               04/13/2010             88,067                9.20
Icahn Partners               04/14/2010             98,048                9.46
Icahn Partners               04/15/2010             30,529                9.45
Icahn Partners               04/16/2010             58,710                9.33
Icahn Partners               04/19/2010             40,892                9.32
Icahn Partners               04/20/2010             18,817                9.39
Icahn Partners               04/21/2010             42,331                9.41
Icahn Partners               04/22/2010            102,744                9.34
Icahn Partners               04/23/2010             33,817                9.44
Icahn Partners               04/26/2010             54,514                9.51
Icahn Partners               04/27/2010             65,668                9.23
Icahn Partners               04/28/2010             45,501                9.06
Icahn Partners               04/29/2010             58,007                9.30
Icahn Partners               04/30/2010             51,724                9.14
Icahn Partners               05/03/2010             20,124                9.20
Icahn Partners               05/04/2010             58,832                8.88
Icahn Partners               05/05/2010             53,678                8.79
Icahn Partners               05/06/2010             50,707                8.48
Icahn Partners               05/07/2010             58,251                8.17
Icahn Partners               05/10/2010             37,600                8.57
Icahn Partners               05/11/2010             47,183                8.64
Icahn Partners               05/12/2010             50,241                8.80
Icahn Partners               05/13/2010             56,561                9.12
Icahn Partners               05/14/2010             38,213                8.93
Icahn Partners               05/17/2010             63,182                8.92
Icahn Partners               05/18/2010             82,134                9.00
Icahn Partners               05/19/2010             83,764                8.96
Icahn Partners               05/20/2010             87,375                8.70
Icahn Partners               05/21/2010             60,755                8.61
Icahn Partners               05/24/2010             47,563                8.58
Icahn Partners               05/25/2010             55,512                8.30
Icahn Partners               05/26/2010             49,662                8.62
Icahn Partners               05/27/2010             56,846                8.92

Icahn Master                 04/07/2010             94,135                8.23
Icahn Master                 04/08/2010             46,848                8.26
Icahn Master                 04/09/2010            134,430                8.59
Icahn Master                 04/12/2010             49,806                8.99
Icahn Master                 04/13/2010            100,823                9.20
Icahn Master                 04/14/2010            112,249                9.46
Icahn Master                 04/15/2010             34,952                9.45
Icahn Master                 04/16/2010             67,215                9.33
Icahn Master                 04/19/2010             46,815                9.32
Icahn Master                 04/20/2010             21,543                9.39
Icahn Master                 04/21/2010             48,462                9.41
Icahn Master                 04/22/2010            117,626                9.34
Icahn Master                 04/23/2010             38,716                9.44
Icahn Master                 04/26/2010             62,409                9.51
Icahn Master                 04/27/2010             75,179                9.23
Icahn Master                 04/28/2010             52,092                9.06
Icahn Master                 04/29/2010             66,408                9.30
Icahn Master                 04/30/2010             59,217                9.14
Icahn Master                 05/03/2010             59,876                9.20
Icahn Master                 05/04/2010             69,337                8.88
Icahn Master                 05/05/2010             63,261                8.79
Icahn Master                 05/06/2010             59,760                8.48
Icahn Master                 05/07/2010             68,650                8.17
Icahn Master                 05/10/2010             44,313                8.57
Icahn Master                 05/11/2010             55,607                8.64
Icahn Master                 05/12/2010             59,210                8.80
Icahn Master                 05/13/2010             66,660                9.12
Icahn Master                 05/14/2010             45,034                8.93
Icahn Master                 05/17/2010             74,463                8.92
Icahn Master                 05/18/2010             96,796                9.00
Icahn Master                 05/19/2010             98,719                8.96
Icahn Master                 05/20/2010            102,975                8.70
Icahn Master                 05/21/2010             71,603                8.61
Icahn Master                 05/24/2010             56,052                8.58
Icahn Master                 05/25/2010             65,424                8.30
Icahn Master                 05/26/2010             58,529                8.62
Icahn Master                 05/27/2010             66,995                8.92

Icahn Master II              04/07/2010             34,635                8.23
Icahn Master II              04/08/2010             17,237                8.26
Icahn Master II              04/09/2010             49,460                8.59
Icahn Master II              04/12/2010             18,326                8.99
Icahn Master II              04/13/2010             37,095                9.20
Icahn Master II              04/14/2010             41,299                9.46
Icahn Master II              04/15/2010             12,861                9.45
Icahn Master II              04/16/2010             24,730                9.33
Icahn Master II              04/19/2010             17,225                9.32
Icahn Master II              04/20/2010              7,926                9.39
Icahn Master II     04/21/2010      17,830      9.41
Icahn Master II     04/22/2010      43,279      9.34
Icahn Master II     04/23/2010      14,245      9.44
Icahn Master II     04/26/2010      22,961      9.51
Icahn Master II     04/27/2010      27,662      9.23
Icahn Master II     04/28/2010      19,166      9.06
Icahn Master II     04/29/2010      24,433      9.30
Icahn Master II     04/30/2010      21,787      9.14
Icahn Master II     05/04/2010      23,288      8.88
Icahn Master II     05/05/2010      22,146      8.79
Icahn Master II     05/06/2010      20,920      8.48
Icahn Master II     05/07/2010      24,032      8.17
Icahn Master II     05/10/2010      15,514      8.57
Icahn Master II     05/11/2010      19,466      8.64
Icahn Master II     05/12/2010      20,729      8.80
Icahn Master II     05/13/2010      23,335      9.12
Icahn Master II     05/14/2010      15,764      8.93
Icahn Master II     05/17/2010      26,068      8.92
Icahn Master II     05/18/2010      33,885     9.00
Icahn Master II     05/19/2010      34,559     8.96
Icahn Master II     05/20/2010      36,048     8.70
Icahn Master II     05/21/2010      25,067     8.61
Icahn Master II     05/24/2010       8,641     8.30
Icahn Master II     05/25/2010      19,622     8.58
Icahn Master II     05/26/2010      20,489     8.62
Icahn Master II     05/27/2010      23,452     8.92

Icahn Master III     04/07/2010      13,085      8.23
Icahn Master III     04/08/2010      6,514      8.26
Icahn Master III     04/09/2010      18,688      8.59
Icahn Master III     04/12/2010      6,923      8.99
Icahn Master III     04/13/2010      14,015      9.20
Icahn Master III     04/14/2010      15,604      9.46
Icahn Master III     04/15/2010      4,858      9.45
Icahn Master III     04/16/2010      9,345      9.33
Icahn Master III     04/19/2010      6,508      9.32
Icahn Master III     04/20/2010      2,994      9.39
Icahn Master III     04/21/2010      6,737      9.41
Icahn Master III     04/22/2010      16,351      9.34
Icahn Master III     04/23/2010      5,382      9.44
Icahn Master III     04/26/2010      8,676      9.51
Icahn Master III     04/27/2010      10,451      9.23
Icahn Master III     04/28/2010      7,241      9.06
Icahn Master III     04/29/2010      9,232      9.30
Icahn Master III     04/30/2010      8,232      9.14
Icahn Master III     05/04/2010      8,543      8.88
Icahn Master III     05/05/2010      8,355      8.79
Icahn Master III     05/06/2010      7,893      8.48
Icahn Master III     05/07/2010      9,067      8.17
Icahn Master III     05/10/2010      5,853      8.57
Icahn Master III     05/11/2010      7,344      8.64
Icahn Master III     05/12/2010      7,820      8.80
Icahn Master III     05/13/2010      8,804      9.12
Icahn Master III     05/14/2010      5,949      8.93
Icahn Master III     05/17/2010      9,835      8.92
Icahn Master III     05/18/2010      12,785     9.00
Icahn Master III     05/19/2010      13,038     8.96
Icahn Master III     05/20/2010      13,602     8.70
Icahn Master III     05/21/2010      9,455     8.61
Icahn Master III     05/24/2010      7,403     8.58
Icahn Master III     05/25/2010      8,641     8.30
Icahn Master III     05/26/2010      7,730     8.62
Icahn Master III     05/27/2010      8,848     8.92


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

     Except as otherwise described herein, there are no contracts, arrangements,
understandings  or relationships (legal or otherwise) among the persons named in
Item 2 and between such persons and any person with respect to any securities of
the  Issuer,  including  but  not  limited  to  transfer or voting of any of the
securities,  finder's fees, joint ventures, loan or option arrangements, puts or
calls,  guarantees  of  profits,  division  of profits or loss, or the giving or
withholding  of  proxies.

Item 7. Material to be Filed as Exhibits

1     Joint  Filing  Agreement  of  the  Reporting  Persons.




                                   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:  May  27,  2010


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 1

                             JOINT FILING AGREEMENT

     In  accordance  with  Rule 13d-1(k)(1) under the Securities Exchange Act of
1934, as amended, the persons named below agree to the joint filing on behalf of
each  of them of a statement on Schedule 13D (including amendments thereto) with
respect  to  the  Common  Stock of Mentor Graphics Corporation and further agree
that  this  Joint  Filing  Agreement  be  included  as  an Exhibit to such joint
filings.  In  evidence  thereof,  the  undersigned,  being duly authorized, have
executed  this  Joint  Filing  Agreement  this  27th  day  of  May,  2010.



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 Joint Filing Agreement to Schedule 13D - Mentor Graphics
                                  Corporation]


                                   SCHEDULE A

           DIRECTORS AND EXECUTIVE OFFICERS OF THE REPORTING PERSONS

     The  following  sets  forth the name, position, and principal occupation of
each  director and executive officer of each of the Reporting Persons. Each such
person  is  a  citizen  of  the  United  States  of America. Except as otherwise
indicated,  the  business  address  of  each  director  and officer is c/o Icahn
Associates Corp., 767 Fifth Avenue, 47th Floor, New York, New York 10153. To the
best  of the Reporting Persons' knowledge, except as set forth in this statement
on  Schedule  13D,  none of the directors or executive officers of the Reporting
Persons  own  any  Shares.

ICAHN  PARTNERS  MASTER  FUND  LP
ICAHN  PARTNERS  MASTER  FUND  II  LP
ICAHN  PARTNERS  MASTER  FUND  III  LP

Name                    Position
- ----                    --------
Icahn  Offshore  LP          General  Partner
Carl  Icahn               Chief  Executive  Officer
Keith  A.  Meister          Managing  Director
Vincent  J.  Intrieri          Managing  Director
Irene  March               Chief  Financial  Officer
Edward  E.  Mattner          Authorized  Signatory
Gail  Golden               Authorized  Signatory
Dana  Witkin               Director  of  Investor  Relations
Keith  Cozza               Chief  Compliance  Officer
Anthony  Canova          Controller


ICAHN  PARTNERS  LP

Name                    Position
- ----                    --------
Icahn  Onshore  LP          General  Partner
Carl  Icahn               Chief  Executive  Officer
Keith  A.  Meister          Managing  Director
Vincent  J.  Intrieri          Managing  Director
Irene  March               Chief  Financial  Officer
Edward  E.  Mattner          Authorized  Signatory
Gail  Golden               Authorized  Signatory
Dana  Witkin               Director  of  Investor  Relations
Keith  Cozza               Chief  Compliance  Officer
Anthony  Canova          Controller


ICAHN  ONSHORE  LP
ICAHN  OFFSHORE  LP

Name                    Position
- ----                    --------
Icahn  Capital  LP          General  Partner
Carl  Icahn               Chief  Executive  Officer
Keith  A.  Meister          Managing  Director
Vincent  J.  Intrieri          Managing  Director
Irene  March               Chief  Financial  Officer
Edward  E.  Mattner          Authorized  Signatory
Gail  Golden               Authorized  Signatory
Dana  Witkin               Director  of  Investor  Relations
Keith  Cozza               Chief  Compliance  Officer
Anthony  Canova          Controller


ICAHN  CAPITAL  LP

Name                    Position
- ----                    --------
IPH GP LLC               General Partner
Carl  Icahn               Chief  Executive  Officer
Keith  A.  Meister          Managing  Director
Vincent  J.  Intrieri          Managing  Director
Irene  March               Chief  Financial  Officer
Edward  E.  Mattner          Authorized  Signatory
Gail  Golden               Authorized  Signatory
Dana  Witkin               Director  of  Investor  Relations
Keith  Cozza               Chief  Compliance  Officer
Anthony  Canova          Controller


IPH  GP  LLC

Name                    Position
- ----                    --------
Icahn Enterprises          Sole Member
Holdings L.P.
Carl  Icahn               Chief  Executive  Officer
Keith  A.  Meister          Managing  Director
Vincent  J.  Intrieri          Managing  Director
Irene  March               Chief  Financial  Officer
Edward  E.  Mattner          Authorized  Signatory
Gail  Golden               Authorized  Signatory
Dana  Witkin               Director  of  Investor  Relations
Keith  Cozza               Chief  Compliance  Officer
Anthony  Canova          Controller


ICAHN ENTERPRISES HOLDINGS L.P.

Name                    Position
- ----                    --------
Icahn Enterprises          General Partner
G.P. Inc.


ICAHN ENTERPRISES G.P. INC.

Name                    Position
- ----                    --------
Carl C. Icahn     Chairman
Keith A. Meister     Vice Chairman, Principal Executive Officer
Daniel Ninivaggi     President
William A. Leidesdorf     Director
Jack G. Wasserman     Director
James L. Nelson     Director
Vincent J. Intrieri     Director
Dominick Ragone     Chief Financial Officer
Felicia P. Buebel     Assistant Secretary
Craig Petit     Vice President/Taxes


BECKTON CORP.

Name                    Position
- ----                    --------
Carl C. Icahn               Chairman of the Board; President
Jordan Bleznick               Vice President/Taxes
Edward E. Mattner          Authorized Signatory
Keith Cozza               Secretary; Treasurer


HIGH RIVER LIMITED PARTNERSHIP

Name                    Position
- ----                    --------

Hopper Investments LLC     General Partner


HOPPER INVESTMENTS LLC

Name                    Position
- ----                    --------

Barberry Corp               General Partner
Edward E. Mattner          Authorized Signatory


BARBERRY CORP.

Name                    Position
- ----                    --------
Carl C. Icahn               Chairman of the Board; President
Gail Golden               Vice President; Authorized Signatory
Jordan Bleznick               Vice President/Taxes
Vincent J. Intrieri          Vice President; Authorized Signatory
Irene March               Authorized Signatory
Edward E. Mattner          Authorized Signatory
Keith Cozza               Secretary; Treasurer