MENT Mentor Graphics Corp.

CUSIP No. 587200106                     13G                 Page 2 OF 4 Pages


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1.      NAMES OF REPORTING PERSONS

Munder Capital Management
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2.      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP        (a) [ ]
        (see instructions)                                      (b) [ ]
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3.    SEC USE ONLY

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4.    CITIZENSHIP OR PLACE OF ORGANIZATION

        State of Delaware
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                        5.       SOLE VOTING POWER

      NUMBER OF                         5,202,275**
       SHARES              -----------------------------------------------------
    BENEFICIALLY        6.       SHARED VOTING POWER
       OWNED BY
         EACH   0
     REPORTING             -----------------------------------------------------
    PERSON WITH            7.       SOLE DISPOSITIVE POWER

                5,861,038**
                           -----------------------------------------------------
                8.       SHARED DISPOSITIVE POWER

                                0
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  9.     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        5,861,038**
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 10.     CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
                SHARES (SEE INSTRUCTIONS)                             [ ]

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 11.     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

5.2%
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 12.     TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

IA
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** SEE ITEM 4 OF THIS FILING.


CUSIP No. 587200106                     13G                 Page 3 OF 4 Pages


Item 1.

(a)     Name of Issuer:

        Mentor Graphics Corporation (the Company)

(b)     Address of Issuer's Principal Executive Offices:

        8005 SW Boeckman Road
        Wilsonville, Oregon  97070-7777

Item 2.

(a)     Name of Person Filing:

        Munder Capital Management (Munder Capital)

(b)     Address of Principal Business Office:

Munder Capital Center
480 Pierce Street
Birmingham, MI  48009

(c)     Citizenship:

Delaware

(d)     Title of Class of Securities:

        Common Stock

(e)     CUSIP Number:

        587200106

Item 3. If this statement is filed pursuant to 240.13d-1(b) or 240.13d-2(b)
or (c), check whether the person filing is a:

                (e)     [X] An investment adviser in accordance with 240.13d-
                                1(b)(1)(ii)(E);

Item 4. Ownership

       The information in Item 1 and Items 5 and through 11 on the cover
page of this Schedule G is herebyincorporated by reference.

        Munder Capital is the sole owner of Integrity Asset Management, LLC
("Integrity").  Due to this ownership structure, holdings for Munder Capital
and Integrity are aggregated for purposes of this filing.  Munder Capital
and Integrity are registered investment advisers, each furnishing investment
advice to various investment companies registered under Section 8 of the
Investment Company Act of 1940 and to individual and institutional clients
(collectively referred to herein as "Managed Portfolios").


CUSIP No. 587200106                     13G                 Page 4 OF 4 Pages


       As a result of its ownership structure and its role as investment
adviser or sub-adviser to the Managed Portfolios, Munder Capital may be
deemed to be the beneficial owner of 5,861,038 shares or 5.2% of the shares
of the Companys common stock outstanding (the Common Stock).
However, Munder Capital does not have the right to receive any dividends
from, or the proceeds from the sale of, the Common Stock held by the Managed
Portfolios and disclaims any ownership associated with such rights.  No
Managed Portfolio has the right to receive or the power to direct the
receipt of dividends from, or the proceeds from the sale of, more than
5% of the Common Stock.

Item 7. Identification and Classification of the Subsidiary Which Acquired
the Security Being Reported on by the Parent Holding Company

                        Not Applicable.

Item 8. Identification and Classification of Members of the Group

                Not Applicable.

Item 9. Notice of Dissolution of Group

                Not Applicable.

Item 10.        Certification

        By signing below I certify that, to the best of my knowledge
and belief, the securities referred to above were acquired and are held
in the ordinary course of business and were not acquired and are not
held for the purpose of or with the effect of changing or influencing
the control of the issuer of the securities and were not acquired and
are not held in connection with or as a participant in any
transaction having that purpose or effect.




        SIGNATURE

        After reasonable inquiry and to the best of my knowledge and
belief, I certify that the information set forth in this statement is
true, complete and correct.

                                        February 13, 2013

                                        MUNDER CAPITAL MANAGEMENT,
                                        a Delaware general partnership


                                        By:     /s/ Mary Ann C. Shumaker
                                                Associate General Counsel