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

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 1)*

                             Kerr-McGee Corporation
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                    492386107
                                 (CUSIP Number)

                               Marc Weitzen, Esq.
                                 General Counsel
                  Icahn Associates Corp. & affiliated companies
                          767 Fifth Avenue, 47th Floor
                            New York, New York 10153
                                 (212) 702-4388

           (Name, Address and Telephone Number of Person Authorized to
                       Receive Notices and Communications)

                                 March 10, 2005
             (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 "  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.  492386107

1        NAME OF REPORTING PERSON
            High River Limited Partnership

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) / /
                                                                        (b) / /
3        SEC USE ONLY

4        SOURCE OF FUNDS*
            OO

5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS 
          IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                       /X/

6        CITIZENSHIP OR PLACE OF ORGANIZATION
            Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7        SOLE VOTING POWER
            1,476,200

8        SHARED VOTING POWER
            0

9        SOLE DISPOSITIVE POWER
            1,476,200

10       SHARED DISPOSITIVE POWER
            0

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            1,476,200

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
            //
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
            0.97%

14       TYPE OF REPORTING PERSON*
            PN





                                  SCHEDULE 13D

CUSIP No.  492386107

         NAME OF REPORTING PERSON
            Hopper Investments LLC

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) / /
                                                                        (b) / /
3        SEC USE ONLY

4        SOURCE OF FUNDS*
            OO

5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS
         IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                         /X/

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
            1,476,200

9        SOLE DISPOSITIVE POWER
            0

10       SHARED DISPOSITIVE POWER
            1,476,200

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            1,476,200

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
            //
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
            0.97%

14       TYPE OF REPORTING PERSON*
            OO





                                  SCHEDULE 13D

CUSIP No.  492386107

         NAME OF REPORTING PERSON
            Barberry Corp.

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) / /
                                                                        (b) / /
3        SEC USE ONLY

4        SOURCE OF FUNDS*
            OO

5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS 
          IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                        /X/

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
            1,476,200

9        SOLE DISPOSITIVE POWER
             0

10       SHARED DISPOSITIVE POWER
            1,476,200

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            1,476,200

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
            //
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
            0.97%

14       TYPE OF REPORTING PERSON*
            CO





                                  SCHEDULE 13D

CUSIP No.  492386107

         NAME OF REPORTING PERSON
                  Icahn Partners Master Fund L.P.

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) / /
                                                                        (b) / /
3        SEC USE ONLY

4        SOURCE OF FUNDS*
             OO

5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS
          IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                        /X/

6        CITIZENSHIP OR PLACE OF ORGANIZATION
            Cayman Islands

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7        SOLE VOTING POWER
            3,013,412

8        SHARED VOTING POWER
            0

9        SOLE DISPOSITIVE POWER
            3,013,412

10       SHARED DISPOSITIVE POWER
            0

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            3,013,412

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
            //
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
             1.99%

14       TYPE OF REPORTING PERSON*
             PN





                                  SCHEDULE 13D

CUSIP No.  492386107

         NAME OF REPORTING PERSON
              Icahn Offshore L.P.

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) / /
                                                                        (b) / /
3        SEC USE ONLY

4        SOURCE OF FUNDS*
             OO

5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS
           IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                       /X/

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
            3,013,412

9        SOLE DISPOSITIVE POWER
             0

10       SHARED DISPOSITIVE POWER
             3,013,412

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
             3,013,412

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
              //
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
              1.99%

14       TYPE OF REPORTING PERSON*
               PN





                                  SCHEDULE 13D

CUSIP No.  492386107

         NAME OF REPORTING PERSON
                  CCI Offshore LLC

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) / /
                                                                        (b) / /
3        SEC USE ONLY

4        SOURCE OF FUNDS*
            OO

5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS
           IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                       /X/

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
            3,013,412

9        SOLE DISPOSITIVE POWER
              0

10       SHARED DISPOSITIVE POWER
            3,013,412

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            3,013,412

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
             //
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
             1.99%

14       TYPE OF REPORTING PERSON*
             OO





                                  SCHEDULE 13D

CUSIP No.  492386107

         NAME OF REPORTING PERSON
           Icahn Partners L.P.

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) / /
                                                                        (b) / /
3        SEC USE ONLY

4        SOURCE OF FUNDS*
               OO

5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS
          IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                        /X/

6        CITIZENSHIP OR PLACE OF ORGANIZATION
               Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7        SOLE VOTING POWER
            2,891,388

8        SHARED VOTING POWER
              0

9        SOLE DISPOSITIVE POWER
            2,891,388

10       SHARED DISPOSITIVE POWER
              0

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
             2,891,388

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
             //
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
             1.91%

14       TYPE OF REPORTING PERSON*
              PN





                                  SCHEDULE 13D

CUSIP No.  492386107

         NAME OF REPORTING PERSON
           Icahn Onshore L.P.

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) / /
                                                                        (b) / /
3        SEC USE ONLY

4        SOURCE OF FUNDS*
             OO

5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS
           IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                       /X/

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
            2,891,388

9        SOLE DISPOSITIVE POWER
             0

10       SHARED DISPOSITIVE POWER
            2,891,388

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            2,891,388

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
             //
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
             1.91%

14       TYPE OF REPORTING PERSON*
              PN





                                  SCHEDULE 13D

CUSIP No.  492386107

         NAME OF REPORTING PERSON
            CCI Onshore LLC

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) / /
                                                                        (b) / /
3        SEC USE ONLY

4        SOURCE OF FUNDS*
             OO

5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS
           IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                       /X/

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
            2,891,388

9        SOLE DISPOSITIVE POWER
              0

10       SHARED DISPOSITIVE POWER
             2,891,388

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
             2,891,388

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
             //
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
             1.91%

14       TYPE OF REPORTING PERSON*
              OO





                                  SCHEDULE 13D

CUSIP No.  492386107

1        NAME OF REPORTING PERSON
            Carl C. Icahn

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) / /
                                                                        (b) / /
3        SEC USE ONLY

4        SOURCE OF FUNDS*
             OO

5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS
           IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                       /X/

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
            7,381,000

9        SOLE DISPOSITIVE POWER
            0

10       SHARED DISPOSITIVE POWER
            7,381,000


11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            7,381,000


12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
             //
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
            4.87%

14       TYPE OF REPORTING PERSON*
              IN








                                  SCHEDULE 13D

Item 1.  Security and Issuer

         This  Statement  constitutes  Amendment  No.  1  to  the  Schedule  13D
previously filed on March 3, 2005. All capitalized  terms not otherwise  defined
shall have the meaning  ascribed to such terms in the previously filed statement
on Schedule 13D.


Item 3.  Source and Amount of Funds or Other Consideration

         The aggregate  purchase price of the 7,381,000 Shares purchased by High
River,  Icahn  Master  and Icahn  Partners,  collectively,  was  $530,203,600.84
(including  commissions  and,  with respect to Shares  acquired upon exercise of
options,  including  option  purchase  prices).  The source of  funding  for the
purchase  of these  Shares was the  respective  general  working  capital of the
purchasers,  and, with respect to High River, pursuant to margin accounts in the
regular course of business.


Item 4.  Purpose of Transaction

Item 4 is hereby amended to add the following:

         On March 10, 2005,  the Reporting  Persons and Jana Partners LLC sent a
letter  to the  Issuer  (the  "Response  Letter"),  responding  to the  Issuer's
announcement of the proposed sale of its chemicals business and share repurchase
program.  A copy of the  Response  Letter is filed  herewith  as an exhibit  and
incorporated  herein by reference,  and any descriptions  herein of the Response
Letter are qualified in their entirety by reference to the Response Letter.

SECURITY  HOLDERS ARE ADVISED TO READ THE PROXY  STATEMENT  AND OTHER  DOCUMENTS
RELATED TO  SOLICITATION OF PROXIES BY MESSRS.  CARL ICAHN AND BARRY  ROSENSTEIN
AND THEIR RESPECTIVE AFFILIATES FROM THE STOCKHOLDERS OF KERR-MCGEE  CORPORATION
FOR USE AT ITS ANNUAL  MEETING WHEN AND IF THEY BECOME  AVAILABLE,  BECAUSE THEY
WILL  CONTAIN  IMPORTANT  INFORMATION,  INCLUDING  INFORMATION  RELATING  TO THE
PARTICIPANTS IN ANY SUCH PROXY  SOLICITATION.  WHEN AND IF COMPLETED,  THE PROXY
STATEMENT  AND SUCH  OTHER  DOCUMENTS  WILL BE  AVAILABLE  AT NO  CHARGE  AT THE
SECURITIES  AND  EXCHANGE  COMMISSION'S  WEBSITE  AT  HTTP://WWW.SEC.GOV,  AND A
DEFINITIVE PROXY STATEMENT AND A FORM OF PROXY WILL BE MAILED TO STOCKHOLDERS OF
KERR-MCGEE CORPORATION.


Item 5.  Interest in Securities of the Issuer

Item 5 is hereby supplemented as follows:

         (a) The  Reporting  Persons may be deemed to  beneficially  own, in the
aggregate,  7,381,000 Shares,  representing  approximately 4.87% of the Issuer's
outstanding  Shares (based upon the 151,692,157  Shares stated to be outstanding
as of October  31, 2004 by the Issuer in the  Issuer's  Form 10-Q for the period
ending September 30, 2004, filed with the Securities and Exchange  Commission on
November 9, 2004).

         (b) High River has sole voting  power and sole  dispositive  power with
regard to  1,476,200  Shares.  Each of  Barberry,  Hopper  and Carl C. 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
3,013,412  Shares.  Each of Icahn  Offshore,  CCI Offshore and Carl C. 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
2,891,388  Shares.  Each of Icahn  Onshore,  CCI  Onshore  and Carl C. Icahn has
shared voting power and shared dispositive power with regard to such Shares.

         The Reporting Persons may be deemed to be members of a "group" with the
Jana  Parties  within the meaning of Section  13(d)(3) of the Act. As such,  the
Reporting  Persons may be deemed to  beneficially  own Shares  owned by the Jana
Parties.  Upon  information  and belief,  the Jana  Parties,  as of the close of
business on March 9, 2005, may be deemed to beneficially own 4,332,400 Shares in
the  aggregate.  Accordingly,  the  11,713,400  Shares  that may be deemed to be
beneficially  owned  in the  aggregate  by the  Reporting  Persons  and the Jana
Parties constitutes approximately 7.72% of the Shares outstanding.  However, the
Reporting  Persons  disclaim  membership  in any such group for all purposes and
disclaim ownership of any Shares owned by the Jana Parties, and neither the fact
of this filing or anything  contained  herein shall be deemed to be an admission
by any of the Reporting Persons that they are members of such a group.

         (c) The  following  table sets forth all  transactions  with respect to
Shares  effected  since the most recent  filing on Schedule 13D by the Reporting
Persons.  All such  transactions  were effected in the open market and the table
includes commissions paid in per share prices.


------------------ -------------- -------------------  ------------------
                                   No. of Shares               Price
 Name                Date            Purchased               Per Share
------------------ -------------- ------------------- -------------------
------------------ -------------- ------------------- -------------------
High River          03/10/05             55,000               77.0961
------------------ -------------- ------------------- -------------------
------------------ -------------- ------------------- -------------------
Icahn Master        03/10/05            112,200               77.0961
------------------ -------------- ------------------- -------------------
------------------ -------------- ------------------- -------------------
Icahn Partners     03/10/05             107,800               77.0961
------------------ -------------- ------------------- -------------------


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

Item 6 is hereby amended to add the following:

         On March 10, 2005, the Reporting  Persons and Jana Partners LLC sent to
the Issuer the  Response  Letter more fully  described  in Item 4. A copy of the
Response  Letter is filed  herewith  as an exhibit  and  incorporated  herein by
reference,  and any descriptions  herein of the Response Letter are qualified in
their entirety by reference to the Response Letter.


Item 7.  Material to be Filed as Exhibits

1        Letter from the Reporting Persons and Jana Partners LLC to the Issuer.






                                    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: March 10, 2005


                             HOPPER INVESTMENTS LLC

         By:   Barberry Corp.


         By:   /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory

BARBERRY CORP.


         By:    /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory


HIGH RIVER LIMITED PARTNERSHIP

By:      Hopper Investments LLC, General Partner

         By:  Barberry Corp., member


         By:  /s/ Edward E. Mattner
              Name: Edward E. Mattner
              Title: Authorized Signatory

ICAHN PARTNERS MASTER FUND L.P.

         By:   /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory


                [Signature Page of Amendment #1 to Schedule 13D -
                               Kerr-McGee, Inc.]










ICAHN OFFSHORE L.P.

         By:    /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory

CCI OFFSHORE LLC

         By:      /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory

ICAHN PARTNERS L.P.

         By:      /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory

ICAHN ONSHORE L.P.

         By:      /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory

CCI ONSHORE LLC

         By:      /s/ Edward E. Mattner
         Name: Edward E. Mattner
         Title: Authorized Signatory


/s/ Carl C. Icahn_____________
-----------------
CARL C. ICAHN


                        [Signature  Page  of  Amendment  #1  to  Schedule  13D -
Kerr-McGee, Inc.]