SCHEDULE 14A
                Proxy Statement Pursuant to Section 14(a) of the
               Securities Exchange Act of 1934 (Amendment No. __)

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[X]   Soliciting Material Pursuant toSection240.14a-12

                             Kerr-McGee Corporation
                                                                 
                (Name of Registrant as Specified In Its Charter)

                                Icahn Partners LP
                          Icahn Partners Master Fund LP
                         High River Limited Partnership
                                  Carl C. Icahn
                                Keith A. Meister
                               Vincent J. Intrieri
                                JANA Partners LLC
                             JANA Master Fund, Ltd.
                               Barry S. Rosenstein
                                   August Roth

                                                   
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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      On April 4, 2005, Carl C. Icahn and Barry S. Rosenstein sent a letter to
the Board of Directors of Kerr-McGee Corporation. A copy of the letter is
attached hereto.

CARL C. ICAHN, BARRY S. ROSENSTEIN AND CERTAIN RELATED PARTIES FILED A
PRELIMINARY PROXY STATEMENT WITH THE SECURITIES AND EXCHANGE COMMISSION ON MARCH
24, 2005 RELATING TO THEIR SOLICITATION OF PROXIES FROM THE STOCKHOLDERS OF
KERR-MCGEE CORPORATION WITH RESPECT TO THE 2005 ANNUAL MEETING OF KERR-MCGEE'S
STOCKHOLDERS. THE PRELIMINARY PROXY STATEMENT CONTAINS DETAILED INFORMATION
REGARDING THE NAMES, AFFILIATIONS AND INTERESTS OF PERSONS WHO MAY BE DEEMED
PARTICIPANTS IN THE SOLICITATION OF PROXIES OF KERR-MCGEE'S STOCKHOLDERS. THESE
PARTIES INTEND TO FILE A DEFINITIVE PROXY STATEMENT AND OTHER RELEVANT DOCUMENTS
WITH THE SECURITIES AND EXCHANGE COMMISSION. SECURITY HOLDERS ARE ADVISED TO
READ THE PROXY STATEMENT AND OTHER RELEVANT DOCUMENTS BECAUSE THEY WILL CONTAIN
IMPORTANT INFORMATION. THE PROXY STATEMENT AND OTHER RELEVANT DOCUMENTS MAY BE
OBTAINED WITHOUT CHARGE FROM THE SECURITIES AND EXCHANGE COMMISSION'S WEBSITE AT
HTTP://WWW.SEC.GOV, AND THE DEFINITIVE PROXY STATEMENT AND A FORM OF PROXY WILL
BE MAILED TO STOCKHOLDERS OF KERR-MCGEE CORPORATION.




                                ICAHN PARTNERS LP
                          ICAHN PARTNERS MASTER FUND LP
                         HIGH RIVER LIMITED PARTNERSHIP
                                JANA PARTNERS LLC

                                                   April 4, 2005


VIA FEDERAL EXPRESS AND FACSIMILE 

Board of Directors
Kerr-McGee Corporation
123 Robert S. Kerr Avenue
Oklahoma City, Oklahoma 73102


Ladies and Gentlemen:

      We are appalled at the blatant attempt by Kerr-McGee to thwart our ability
to present to its stockholders a clear alternative in the election of directors
at the upcoming annual meeting of stockholders.

      As you know, we have a vision for Kerr-McGee that is quite different from
the current Board's view of what is good for stockholder values. Our views were
set forth in our letter to you of March 10, 2005. Other than the sale of the
chemicals division, as to which you concur with us, you have to date rejected
our proposed VPP sale and the repurchase of common stock with the proceeds
thereof at prices above $90 per share.

      Our proposed nomination of Carl C. Icahn and Barry S. Rosenstein for
election to the Board at the annual meeting has been met by you with litigation
which seeks to prevent Kerr-McGee stockholders from having the opportunity to
choose whether our views should be heard at the Board level on a continuing
basis and whether we should play a part in making decisions about the future of
Kerr-McGee. Rather than allowing stockholders to vote on the relative merits of
our respective views, you have sought to disenfranchise the stockholders of
Kerr-McGee in connection with the election of directors.

      Surely you are aware that, if you are unsuccessful in court, your
stockholders will not look favorably on your stance against free and open
elections. Even if you are somehow successful in court in quashing our
nominations, we will urge every Kerr McGee stockholder who agrees with our views
to persuade the Board that it is making a grave mistake in its assault on
corporate democracy. We believe that your tactics will not be lost on your
stockholders and that, therefore, your undemocratic strategy will backfire in
either event.



      We strongly suggest that you allow your stockholders the opportunity to
determine whether our views or the Board's views comport with their views about
the future of Kerr-McGee. They can only do so in a real election contest, not a
single ballot election.

                                    Very truly yours,


                                    CARL C. ICAHN



                                    BARRY S. ROSENSTEIN





         [04.04.05 Letter to Kerr-McGee Board from Icahn and Rosenstein]



CARL C. ICAHN, BARRY S. ROSENSTEIN AND CERTAIN RELATED PARTIES FILED A
PRELIMINARY PROXY STATEMENT WITH THE SECURITIES AND EXCHANGE COMMISSION ON MARCH
24, 2005 RELATING TO THEIR SOLICITATION OF PROXIES FROM THE STOCKHOLDERS OF
KERR-MCGEE CORPORATION WITH RESPECT TO THE 2005 ANNUAL MEETING OF KERR-MCGEE'S
STOCKHOLDERS. THE PRELIMINARY PROXY STATEMENT CONTAINS DETAILED INFORMATION
REGARDING THE NAMES, AFFILIATIONS AND INTERESTS OF PERSONS WHO MAY BE DEEMED
PARTICIPANTS IN THE SOLICITATION OF PROXIES OF KERR-MCGEE'S STOCKHOLDERS. THESE
PARTIES INTEND TO FILE A DEFINITIVE PROXY STATEMENT AND OTHER RELEVANT DOCUMENTS
WITH THE SECURITIES AND EXCHANGE COMMISSION. SECURITY HOLDERS ARE ADVISED TO
READ THE PROXY STATEMENT AND OTHER RELEVANT DOCUMENTS BECAUSE THEY WILL CONTAIN
IMPORTANT INFORMATION. THE PROXY STATEMENT AND OTHER RELEVANT DOCUMENTS MAY BE
OBTAINED WITHOUT CHARGE FROM THE SECURITIES AND EXCHANGE COMMISSION'S WEBSITE AT
HTTP://WWW.SEC.GOV, AND THE DEFINITIVE PROXY STATEMENT AND A FORM OF PROXY WILL
BE MAILED TO STOCKHOLDERS OF KERR-MCGEE CORPORATION.