UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G

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

                          AK Steel Holding Corporation
--------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    001547108
                                    ---------
                                 (CUSIP Number)

                                January 13, 2006
                                ----------------
                      (Date of Event which Requires Filing
                               of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule
                                   is filed:

                                [ ] Rule 13d-1(b)
                                [X] Rule 13d-1(c)
                                [ ] Rule 13d-1(d)


*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 the
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).


                                  Page 1 of 16




-------------------                                           ------------------
CUSIP No. 001547108                    13G                    Page 2 of 16 Pages
-------------------                                           ------------------

---------- ---------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           S.A.C. Capital Advisors, LLC
---------- ---------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) [ ]

                                                                         (b) [X]
---------- ---------------------------------------------------------------------
        3  SEC USE ONLY
---------- ---------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           Delaware
--------------------- ----- ----------------------------------------------------
                         5  SOLE VOTING POWER

                            0
NUMBER OF             ----- ----------------------------------------------------
SHARES                   6  SHARED VOTING POWER
BENEFICIALLY
OWNED                       5,223,500(1)(2) (see Item 4)
BY                    ----- ----------------------------------------------------
EACH                     7  SOLE DISPOSITIVE POWER
REPORTING
PERSON                      0
WITH                  ----- ----------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            5,223,500(1)(2) (see Item 4)
---------- ---------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           5,223,500(1)(2) (see Item 4)
---------- ---------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

           [ ]
---------- ---------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           4.75% (see Item 4)
---------- ---------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON*

           00
---------- ---------------------------------------------------------------------

                       *SEE INSTRUCTION BEFORE FILLING OUT


                                  Page 2 of 16




-------------------                                           ------------------
CUSIP No. 001547108                    13G                    Page 3 of 16 Pages
-------------------                                           ------------------

---------- ---------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           S.A.C. Capital Management, LLC
---------- ---------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) [ ]

                                                                         (b) [X]
---------- ---------------------------------------------------------------------
        3  SEC USE ONLY
---------- ---------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           Delaware
--------------------- ----- ----------------------------------------------------
                         5  SOLE VOTING POWER

                            0
NUMBER OF             ----- ----------------------------------------------------
SHARES                   6  SHARED VOTING POWER
BENEFICIALLY
OWNED                       5,223,500(1)(2) (see Item 4)
BY                    ----- ----------------------------------------------------
EACH                     7  SOLE DISPOSITIVE POWER
REPORTING
PERSON                      0
WITH                  ----- ----------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            5,223,500(1)(2) (see Item 4)
---------- ---------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           5,223,500(1)(2) (see Item 4)
---------- ---------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

           [ ]
---------- ---------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           4.75% (see Item 4)
---------- ---------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON*

           00
---------- ---------------------------------------------------------------------

                       *SEE INSTRUCTION BEFORE FILLING OUT


                                  Page 3 of 16




-------------------                                           ------------------
CUSIP No. 001547108                    13G                    Page 4 of 16 Pages
-------------------                                           ------------------

---------- ---------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           S.A.C. Capital Associates, LLC
---------- ---------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) [ ]

                                                                         (b) [X]
---------- ---------------------------------------------------------------------
        3  SEC USE ONLY
---------- ---------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           Anguilla, British West Indies
--------------------- ----- ----------------------------------------------------
                         5  SOLE VOTING POWER

                            0
NUMBER OF             ----- ----------------------------------------------------
SHARES                   6  SHARED VOTING POWER
BENEFICIALLY
OWNED                       4,860,000(1) (see Item 4)
BY                    ----- ----------------------------------------------------
EACH                     7  SOLE DISPOSITIVE POWER
REPORTING
PERSON                      0
WITH                  ----- ----------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            4,860,000(1) (see Item 4)
---------- ---------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           4,860,000(1) (see Item 4)
---------- ---------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

           [ ]
---------- ---------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           4.42% (see Item 4)
---------- ---------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON*

           00
---------- ---------------------------------------------------------------------

                       *SEE INSTRUCTION BEFORE FILLING OUT


                                  Page 4 of 16




-------------------                                           ------------------
CUSIP No. 001547108                    13G                    Page 5 of 16 Pages
-------------------                                           ------------------

---------- ---------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           S.A.C. MultiQuant Fund, LLC
---------- ---------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) [ ]

                                                                         (b) [X]
---------- ---------------------------------------------------------------------
        3  SEC USE ONLY
---------- ---------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           Anguilla, British West Indies
--------------------- ----- ----------------------------------------------------
                         5  SOLE VOTING POWER

                            0
NUMBER OF             ----- ----------------------------------------------------
SHARES                   6  SHARED VOTING POWER
BENEFICIALLY
OWNED                       187,000 (see Item 4)
BY                    ----- ----------------------------------------------------
EACH                     7  SOLE DISPOSITIVE POWER
REPORTING
PERSON                      0
WITH                  ----- ----------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            187,000 (see Item 4)
---------- ---------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           187,000 (see Item 4)
---------- ---------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

           [ ]
---------- ---------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           Less than 0.2% (see Item 4)
---------- ---------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON*

           00
---------- ---------------------------------------------------------------------

                       *SEE INSTRUCTION BEFORE FILLING OUT


                                  Page 5 of 16




-------------------                                           ------------------
CUSIP No. 001547108                    13G                    Page 6 of 16 Pages
-------------------                                           ------------------

---------- ---------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           S.A.C. Select Fund, LLC
---------- ---------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) [ ]

                                                                         (b) [X]
---------- ---------------------------------------------------------------------
        3  SEC USE ONLY
---------- ---------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           Anguilla, British West Indies
--------------------- ----- ----------------------------------------------------
                         5  SOLE VOTING POWER

                            0
NUMBER OF             ----- ----------------------------------------------------
SHARES                   6  SHARED VOTING POWER
BENEFICIALLY
OWNED                       176,500(2) (see Item 4)
BY                    ----- ----------------------------------------------------
EACH                     7  SOLE DISPOSITIVE POWER
REPORTING
PERSON                      0
WITH                  ----- ----------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            176,500(2) (see Item 4)
---------- ---------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           176,500(2) (see Item 4)
---------- ---------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

           [ ]
---------- ---------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           Less than 0.2% (see Item 4)
---------- ---------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON*

           00
---------- ---------------------------------------------------------------------

                       *SEE INSTRUCTION BEFORE FILLING OUT


                                  Page 6 of 16




-------------------                                           ------------------
CUSIP No. 001547108                    13G                    Page 7 of 16 Pages
-------------------                                           ------------------

---------- ---------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           CR Intrinsic Investors, LLC
---------- ---------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) [ ]

                                                                         (b) [X]
---------- ---------------------------------------------------------------------
        3  SEC USE ONLY
---------- ---------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           Delaware
--------------------- ----- ----------------------------------------------------
                         5  SOLE VOTING POWER

                            0
NUMBER OF             ----- ----------------------------------------------------
SHARES                   6  SHARED VOTING POWER
BENEFICIALLY
OWNED                       1,225,000(3) (see Item 4)
BY                    ----- ----------------------------------------------------
EACH                     7  SOLE DISPOSITIVE POWER
REPORTING
PERSON                      0
WITH                  ----- ----------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            1,225,000(3) (see Item 4)
---------- ---------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           1,225,000(3) (see Item 4)
---------- ---------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

           [ ]
---------- ---------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           1.1% (see Item 4)
---------- ---------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON*

           00
---------- ---------------------------------------------------------------------

                       *SEE INSTRUCTION BEFORE FILLING OUT


                                  Page 7 of 16




-------------------                                           ------------------
CUSIP No. 001547108                    13G                    Page 8 of 16 Pages
-------------------                                           ------------------

---------- ---------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           CR Intrinsic Investments, LLC
---------- ---------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) [ ]

                                                                         (b) [X]
---------- ---------------------------------------------------------------------
        3  SEC USE ONLY
---------- ---------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           Anguilla, British West Indies
--------------------- ----- ----------------------------------------------------
                         5  SOLE VOTING POWER

                            0
NUMBER OF             ----- ----------------------------------------------------
SHARES                   6  SHARED VOTING POWER
BENEFICIALLY
OWNED                       1,225,000(3) (see Item 4)
BY                    ----- ----------------------------------------------------
EACH                     7  SOLE DISPOSITIVE POWER
REPORTING
PERSON                      0
WITH                  ----- ----------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            1,225,000(3) (see Item 4)
---------- ---------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           1,225,000(3) (see Item 4)
---------- ---------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

           [ ]
---------- ---------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           1.1% (see Item 4)
---------- ---------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON*

           00
---------- ---------------------------------------------------------------------

                       *SEE INSTRUCTION BEFORE FILLING OUT


                                  Page 8 of 16




-------------------                                           ------------------
CUSIP No. 001547108                    13G                    Page 9 of 16 Pages
-------------------                                           ------------------

---------- ---------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           Steven A. Cohen
---------- ---------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) [ ]

                                                                         (b) [X]
---------- ---------------------------------------------------------------------
        3  SEC USE ONLY
---------- ---------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           United States
--------------------- ----- ----------------------------------------------------
                         5  SOLE VOTING POWER

                            0
NUMBER OF             ----- ----------------------------------------------------
SHARES                   6  SHARED VOTING POWER
BENEFICIALLY
OWNED                       6,448,500(1)(2)(3) (see Item 4)
BY                    ----- ----------------------------------------------------
EACH                     7  SOLE DISPOSITIVE POWER
REPORTING
PERSON                      0
WITH                  ----- ----------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            6,448,500(1)(2)(3) (see Item 4)
---------- ---------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           6,448,500(1)(2)(3) (see Item 4)
---------- ---------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

           [ ]
---------- ---------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           5.9% (see Item 4)
---------- ---------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON*

           IN
---------- ---------------------------------------------------------------------

                       *SEE INSTRUCTION BEFORE FILLING OUT


                                  Page 9 of 16




Item 1(a)           Name of Issuer:
                    --------------

                    AK Steel Holding Corporation

Item 1(b)           Address of Issuer's Principal Executive Offices:
                    -----------------------------------------------

                    703 Curtis Street
                    Middletown, Ohio 45043

Items 2(a)          Name of Person Filing:
                    ---------------------

                    This statement is filed by: (i) S.A.C. Capital Advisors,
                    LLC, ("SAC Capital Advisors") with respect to shares of
                    common stock ("Shares") of the Issuer beneficially owned by
                    S.A.C. Capital Associates, LLC ("SAC Capital Associates"),
                    S.A.C. MultiQuant Fund, LLC ("SAC MultiQuant") and S.A.C.
                    Select Fund, LLC ("SAC Select"); (ii) S.A.C. Capital
                    Management, LLC, ("SAC Capital Management") with respect to
                    Shares beneficially owned by SAC Capital Associates, SAC
                    MultiQuant and SAC Select; (iii) SAC Capital Associates with
                    respect to Shares beneficially owned by it; (iv) SAC
                    MultiQuant with respect to Shares beneficially owned by it;
                    (v) SAC Select with respect to Shares beneficially owned by
                    it; (vi) CR Intrinsic Investors, LLC ("CR Intrinsic
                    Investors") with respect to Shares beneficially owned by CR
                    Intrinsic Investments, LLC ("CR Intrinsic Investments");
                    (vii) CR Intrinsic Investments with respect to Shares
                    beneficially owned by it; and (viii) Steven A. Cohen with
                    respect to Shares beneficially owned by SAC Capital
                    Advisors, SAC Capital Management, SAC Capital Associates,
                    SAC MultiQuant, SAC Select, CR Intrinsic Investors and CR
                    Intrinsic Investments.

Item 2(b)           Address of Principal Business Office:
                    ------------------------------------

                    The address of the principal business office of (i) SAC
                    Capital Advisors, CR Intrinsic Investors and Mr. Cohen is 72
                    Cummings Point Road, Stamford, Connecticut 06902, (ii) SAC
                    Capital Management is 540 Madison Avenue, New York, New York
                    10022, (iii) SAC Capital Associates, and SAC MultiQuant is
                    P.O. Box 58, Victoria House, The Valley, Anguilla, British
                    West Indies and (iv) SAC Select and CR Intrinsic Investments
                    is Box 174, Mitchell House, The Valley, Anguilla, BWI.


                                  Page 10 of 16




Item 2(c)           Citizenship:
                    -----------

                    SAC Capital Advisors, SAC Capital Management and CR
                    Intrinsic Investors are Delaware limited liability
                    companies. SAC Capital Associates, SAC MultiQuant, SAC
                    Select and CR Intrinsic Investments are Anguillan limited
                    liability companies. Mr. Cohen is a United States citizen.

Item 2(d)           Title of Class of Securities:
                    ----------------------------

                    Common Stock

Item 2(e)           CUSIP Number:
                    ------------

                    001547108

Item 3              Not Applicable

Item 4              Ownership:
                    ---------

                    The percentages used herein are calculated based upon the
                    Shares issued and outstanding as of October 31, 2005 as
                    reported on the Issuer's quarterly report on Form 10-Q filed
                    with the Securities and Exchange Commission by the Issuer
                    for the fiscal quarter ended September 30, 2005.

                    As of the close of business on January 20, 2006:

                    1. S.A.C. Capital Advisors, LLC
                    (a) Amount beneficially owned: 5,223,500(1)(2)
                    (b) Percent of class: 4.75%
                    (c) (i) Sole power to vote or direct the vote: -0-
                    (ii) Shared power to vote or direct the vote:
                    5,223,500(1)(2)
                    (iii) Sole power to dispose or direct the disposition: -0-
                    (iv) Shared power to dispose or direct the disposition:
                    5,223,500(1)(2)

                    2. S.A.C. Capital Management, LLC
                    (a) Amount beneficially owned: 5,223,500(1)(2)
                    (b) Percent of class:4.75 %
                    (c) (i) Sole power to vote or direct the vote: -0-
                    (ii) Shared power to vote or direct the vote:
                    5,223,500(1)(2)
                    (iii) Sole power to dispose or direct the disposition: -0-
                    (iv) Shared power to dispose or direct the disposition:
                    5,223,500(1)(2)


                                 Page 11 of 16




                    3. S.A.C. Capital Associates, LLC
                    (a) Amount beneficially owned: 4,860,000(1)
                    (b) Percent of class: 4.42%
                    (c) (i) Sole power to vote or direct the vote: -0-
                    (ii) Shared power to vote or direct the vote: 4,860,000(1)
                    (iii) Sole power to dispose or direct the disposition: -0-
                    (iv) Shared power to dispose or direct the disposition:
                    4,860,000(1)

                    4. S.A.C. MultiQuant Fund, LLC
                    (a) Amount beneficially owned: 187,000
                    (b) Percent of class: Less than 0.2%
                    (c) (i) Sole power to vote or direct the vote: -0-
                    (ii) Shared power to vote or direct the vote: 187,000
                    (iii) Sole power to dispose or direct the disposition: -0-
                    (iv) Shared power to dispose or direct the disposition:
                    187,000

                    5. S.A.C. Select Fund, LLC
                    (a) Amount beneficially owned: 176,500(2)
                    (b) Percent of class: Less than 0.2%
                    (c) (i) Sole power to vote or direct the vote: -0-
                    (ii) Shared power to vote or direct the vote: 176,500(2)
                    (iii) Sole power to dispose or direct the disposition: -0-
                    (iv) Shared power to dispose or direct the disposition:
                    176,500(2)

                    6. CR Intrinsic Investors, LLC
                    (a) Amount beneficially owned: 1,225,000(3)
                    (b) Percent of class: 1.1%
                    (c) (i) Sole power to vote or direct the vote: -0-
                    (ii) Shared power to vote or direct the vote: 1,225,000(3)
                    (iii) Sole power to dispose or direct the disposition: -0-
                    (iv) Shared power to dispose or direct the disposition:
                    1,225,000(3)

                    7. CR Intrinsic Investments, LLC
                    (a) Amount beneficially owned: 1,225,000(3)
                    (b) Percent of class: 1.1%
                    (c) (i) Sole power to vote or direct the vote: -0-
                    (ii) Shared power to vote or direct the vote: 1,225,000(3)
                    (iii) Sole power to dispose or direct the disposition: -0-
                    (iv) Shared power to dispose or direct the disposition:
                    1,225,000(3)

                    8.Steven A. Cohen
                    (a) Amount beneficially owned: 6,448,500(1)(2)(3)
                    (b) Percent of class: 5.9%
                    (c) (i) Sole power to vote or direct the vote: -0-
                    (ii) Shared power to vote or direct the vote:
                    6,448,500(1)(2)(3)
                    (iii) Sole power to dispose or direct the disposition: -0-


                                  Page 12 of 16



                    (iv) Shared power to dispose or direct the disposition:
                    6,448,500(1)(2)(3)

                    (1) The number of shares reported herein includes options
                    held by SAC Capital Associates on 375,000 Shares.

                    (2) The number of shares reported herein includes options
                    held by SAC Select on 131,500 Shares.

                    (3) The number of shares reported herein includes options
                    held by CR Intrinsic Investments on 375,000 Shares.

                    SAC Capital Advisors, SAC Capital Management and CR
                    Intrinsic Investors and Mr. Cohen own directly no Shares.
                    Pursuant to investment agreements, each of SAC Capital
                    Advisors and SAC Capital Management share all investment and
                    voting power with respect to the securities held by SAC
                    Capital Associates, SAC MultiQuant and SAC Select. Pursuant
                    to an investment management agreement, CR Intrinsic
                    Investors maintains investment and voting power with respect
                    to the securities held by CR Intrinsic Investments. Mr.
                    Cohen controls each of SAC Capital Advisors, SAC Capital
                    Management and CR Intrinsic Investors. By reason of the
                    provisions of Rule 13d-3 of the Securities Exchange Act of
                    1934, as amended, each of (i) SAC Capital Advisors, SAC
                    Capital Management and Mr. Cohen may be deemed to own
                    beneficially 5,223,500 Shares (including options on Shares
                    reported herein) (constituting approximately 4.75% of the
                    Shares outstanding) and (ii) CR Intrinsic Investors and Mr.
                    Cohen may be deemed to own beneficially 1,225,000 Shares
                    (including options on Shares reported herein) (constituting
                    approximately 1.1% of the Shares outstanding). Each of SAC
                    Capital Advisors, SAC Capital Management, CR Intrinsic
                    Investors and Mr. Cohen disclaim beneficial ownership of any
                    of the securities covered by this statement.


                                 Page 13 of 16




Item 5              Ownership of Five Percent or Less of a Class:
                    --------------------------------------------

                    If this statement is being filed to report the fact that as
                    of the date hereof the reporting person has ceased to be the
                    beneficial owner of more than five percent of the class of
                    securities, check the following. [ ]

Item 6              Ownership of More than Five Percent on Behalf of Another
                    --------------------------------------------------------
                    Person:
                    ------
                    Not Applicable

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 the signatory certifies that, to the best of his knowledge
and belief, the securities referred to above 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.


                                 Page 14 of 16




                                    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.

Dated: January 23, 2006


S.A.C. CAPITAL ADVISORS, LLC

By: /s/ Peter Nussbaum
    ------------------------------
Name:  Peter Nussbaum
Title: Authorized Person


S.A.C. CAPITAL MANAGEMENT, LLC

By: /s/ Peter Nussbaum
    ------------------------------
Name:  Peter Nussbaum
Title: Authorized Person


S.A.C. CAPITAL ASSOCIATES, LLC

By: /s/ Peter Nussbaum
    ------------------------------
Name:  Peter Nussbaum
Title: Authorized Person


S.A.C. MULTIQUANT FUND, LLC

By: /s/ Peter Nussbaum
    ------------------------------
Name:  Peter Nussbaum
Title: Authorized Person


S.A.C. SELECT FUND, LLC

By: /s/ Peter Nussbaum
    ------------------------------
Name:  Peter Nussbaum
Title: Authorized Person


                                  Page 15 of 16




CR INTRINSIC INVESTORS, LLC

By: /s/ Peter Nussbaum
    ------------------------------
Name:  Peter Nussbaum
Title: Authorized Person


CR INTRINSIC INVESTMENTS, LLC

By: /s/ Peter Nussbaum
    ------------------------------
Name:  Peter Nussbaum
Title: Authorized Person


STEVEN A. COHEN

By: /s/ Peter Nussbaum
    ------------------------------
Name:  Peter Nussbaum
Title: Authorized Person


                                  Page 16 of 16