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]

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