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

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 3)*

                             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)

                                  April 4, 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)/X/
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
                  1,636,820

8        SHARED VOTING POWER
                  0

9        SOLE DISPOSITIVE POWER
                  1,636,820

10       SHARED DISPOSITIVE POWER
                  0

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                  1,636,820

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                  /X/
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                 1.00%

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)/X/
                                                                     
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
                  1,636,820

9        SOLE DISPOSITIVE POWER
                  0

10       SHARED DISPOSITIVE POWER
                  1,636,820

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                  1,636,820

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                  /X/
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                  1.00%

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)/X/
                                                                     
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
                 1,636,820

9        SOLE DISPOSITIVE POWER
                 0

10       SHARED DISPOSITIVE POWER
                 1,636,820

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                 1,636,820

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                  /X/
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                 1.00%

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)/X/
                                                                               
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
                  3,341,077

8        SHARED VOTING POWER
                  0

9        SOLE DISPOSITIVE POWER
                  3,341,077

10       SHARED DISPOSITIVE POWER
                   0

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                   3,341,077

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                  /X/
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                   2.04%

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)/X/
                                                                               

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
                  3,341,077

9        SOLE DISPOSITIVE POWER
                  0

10       SHARED DISPOSITIVE POWER
                  3,341,077

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                   3,341,077

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                  /X/
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                   2.04%

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)/X/

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
                  3,341,077

9        SOLE DISPOSITIVE POWER
                  0

10       SHARED DISPOSITIVE POWER
                  3,341,077

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                  3,341,077

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                  /X/
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                  2.04%

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)/X/ 
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
                  3,206,203

8        SHARED VOTING POWER
                  0

9        SOLE DISPOSITIVE POWER
                  3,206,203

10       SHARED DISPOSITIVE POWER
                  0

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                  3,206,203

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                  /X/
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                 1.96%

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 O                         
                                                                        (a)//
                                                                        (b)/X/
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
                  3,206,203

9        SOLE DISPOSITIVE POWER
                  0

10       SHARED DISPOSITIVE POWER
                  3,206,203

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                  3,206,203

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                  /X/
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                  1.96%

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)/X/
                                                                  
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
                  3,206,203

9        SOLE DISPOSITIVE POWER
                  0

10       SHARED DISPOSITIVE POWER
                  3,206,203

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                  3,206,203

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                  /X/
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                 1.96%

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)/X/
                                                                    

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
                 8,184,100

9        SOLE DISPOSITIVE POWER
                 0

10       SHARED DISPOSITIVE POWER
                 8,184,100


11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                 8,184,100


12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                  /X/
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
                           5.01%

14       TYPE OF REPORTING PERSON*
                  IN









                                  SCHEDULE 13D

Item 1.  Security and Issuer

         The  Schedule 13D filed on March 3, 2005 by the  Reporting  Persons (as
defined herein),  relating to the common stock,  $1.00 par value (the "Shares"),
of Kerr-McGee Corporation,  a Delaware corporation (the "Issuer"), as amended by
Amendment  No. 1 filed on March 11, 2005 and  Amendment No. 2 filed on March 24,
2005, is hereby  amended and restated as set forth below by this Amendment No. 3
to Schedule 13D. The address of the principal executive offices of the Issuer is
Kerr-McGee Center, 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102.

Item 2.  Identity and Background

Item 2 is hereby amended and restated to read, in its entirety, as follows:

         The persons  filing  this  statement  are  Barberry  Corp.,  a Delaware
corporation ("Barberry"),  Hopper Investments, LLC, a Delaware limited liability
company,  High River Limited Partnership,  a Delaware limited partnership ("High
River"),  Icahn Partners Master Fund L.P., a Cayman Islands limited  partnership
("Icahn Master"),  Icahn Offshore L.P., a Delaware limited  partnership  ("Icahn
Offshore"),  CCI  Offshore  LLC,  a Delaware  limited  liability  company  ("CCI
Offshore"),   Icahn  Partners  L.P.,  a  Delaware  limited  partnership  ("Icahn
Partners"),   Icahn  Onshore  L.P.,  a  Delaware  limited   partnership  ("Icahn
Onshore"),  CCI  Onshore  LLC,  a  Delaware  limited  liability  company  (" CCI
Onshore")  and  Carl C.  Icahn,  a  citizen  of the  United  States  of  America
(collectively,  the "Reporting Persons"). The principal business address and the
address of the principal office of the Reporting Persons is c/o Icahn Associates
Corp., 767 Fifth Avenue,  47th Floor, New York, New York 10153,  except that (i)
the principal business address of each of Barberry, Hopper and High River is 100
South Bedford Road, Mount Kisco, New York 10549 and (ii) the principal  business
address of Icahn  Master is c/o Walkers SPV  Limited,  P.O.  Box 908GT,  87 Mary
Street, George Town, Grand Cayman, Cayman Islands.

         Barberry is the sole member of Hopper,  which is the general partner of
High River. CCI Offshore is the general partner of Icahn Offshore,  which is the
general  partner of Icahn  Master.  CCI Onshore is the general  partner of Icahn
Onshore,  which is the general partner of Icahn Partners.  Each of Barberry, CCI
Offshore  and CCI Onshore is 100 percent  owned by Carl C. Icahn.  As such,  Mr.
Icahn is in a position  directly and  indirectly to determine the investment and
voting decisions made by the Reporting Persons.

         Each of Icahn  Master,  Icahn  Partners,  Barberry  and  High  River is
primarily  engaged  in the  business  of  investing  in  securities.  Hopper  is
primarily  engaged in the  business  of serving as the  general  partner of High
River. Icahn Offshore and Icahn Onshore are primarily engaged in the business of
serving as the general partner of Icahn Master and Icahn Partners, respectively.
CCI Offshore and CCI Onshore are primarily engaged in the business of serving as
the general partner of Icahn Offshore and Icahn Onshore,  respectively.  Carl C.
Icahn's  present  principal  occupation  or  employment is (i) owning all of the
interest in CCI Onshore and CCI  Offshore,  through  which Mr. Icahn  indirectly
directs and manages the  investments of Icahn Master and Icahn Partners and (ii)
acting as President and a director of Starfire Holding Corporation ("Starfire"),
and as the  Chairman  of the Board  and a  director  of  various  of  Starfire's
subsidiaries.  Starfire is primarily engaged in the business of investing in and
holding securities of various entities.

         The name,  citizenship,  present principal occupation or employment and
business  address  of each  director  and  executive  officer  of High River and
Barberry, are set forth in Schedule A attached hereto.

         Except as set forth on  Schedule  B, no member of any of the  Reporting
Persons nor any manager or  executive  officer of the  Reporting  Persons,  has,
during  the  past  five  years,  (a) been  convicted  in a  criminal  proceeding
(excluding traffic violations or similar misdemeanors), or (b) been a party to a
civil proceeding of a judicial or administrative body of competent  jurisdiction
and as a result of such  proceeding  was or is subject to a judgment,  decree or
final  order  enjoining  future  violations  of, or  prohibiting,  or  mandating
activities  subject  to,  Federal or State  securities  laws or a finding of any
violation with respect to such laws.

         Any  disclosures  made herein with respect to persons or entities other
than the  Reporting  Persons are made on  information  and belief  after  making
inquiry to the  appropriate  party. By virtue of the  transactions  described in
Item 4, the Reporting Persons and the JANA Parties (as hereinafter  defined) may
be deemed  to be a  "group"  within  the  meaning  of  Section  13(d)(3)  of the
Securities  Exchange Act of 1934, as amended (the "Act").  However,  neither the
fact of this  filing  nor  anything  contained  herein  shall be deemed to be an
admission by any of the Reporting Persons that they are the beneficial owners of
Shares owned by the JANA Parties.

Item 3.  Source and Amount of Funds or Other Consideration

Item 3 is hereby amended and restated to read, in its entirety, as follows:

         The aggregate  purchase price of the 8,184,100 Shares purchased by High
River,  Icahn  Master  and Icahn  Partners,  collectively,  was  $592,607,464.70
(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 and restated to read, in its entirety, as follows:

         The  Reporting  Persons  acquired  the  Shares  believing  them  to  be
undervalued.  The  Reporting  Persons  reserve  the right to acquire  additional
Shares at any time and from time to time in the open  market  or  otherwise.  In
addition,  the Reporting Persons may dispose of all or any portion of the Shares
at any time or from time to time in the open market or otherwise.

         Representatives  of the  Reporting  Persons have had  discussions  with
Barry  Rosenstein and other  representatives  of JANA Partners LLC regarding the
Issuer and the Shares.  Barry  Rosenstein is a managing  member of JANA Partners
LLC,  which  serves as the  investment  manager of JANA Master Fund Ltd.  (Barry
Rosenstein,   JANA  Partners  LLC  and  JANA  Master  Fund  Ltd.  are  sometimes
hereinafter referred to collectively as the "JANA Parties").

         On February 14, 2005,  the  Reporting  Persons  acquired an option (the
"JANA Option") to purchase,  in the  aggregate,  250,000 Shares from JANA Master
Fund Ltd.  Pursuant to the  exercise of the JANA Option on March 1, 2005,  Icahn
Partners purchased 96,000 Shares, Icahn Master purchased 104,000 Shares and High
River purchased  50,000 Shares.  The JANA Option had an exercise price of $60.00
per Share and an  expiration  date of August 14, 2005. A copy of the JANA Option
is filed herewith as an exhibit and  incorporated  herein by reference,  and any
descriptions  herein of the JANA  Option  are  qualified  in their  entirety  by
reference to the JANA Option.

         On March 2,  2005,  the  Reporting  Persons  delivered  a letter to the
Issuer (the  "Notification  Letter"),  notifying  the Issuer that the  Reporting
Persons   intend  to  appear  at  the  2005  annual   meeting  of  the  Issuer's
stockholders,  in person or by proxy,  to nominate  and seek to elect Carl Icahn
and Barry  Rosenstein as members of the board of directors of the Issuer. A copy
of the  Notification  Letter is filed  herewith as an exhibit  and  incorporated
herein by reference,  and any descriptions herein of the Notification Letter are
qualified in their entirety by reference to the Notification Letter.

         On March 3, 2005,  the  Reporting  Persons and JANA Partners LLC sent a
letter to the Issuer (the "Proposed Transaction  Letter"),  regarding a proposed
transaction to increase  shareholder  value. A copy of the Proposed  Transaction
Letter is filed herewith as an exhibit and incorporated herein by reference, and
any  descriptions  herein of the Proposed  Transaction  Letter are  qualified in
their entirety by reference to the Proposed Transaction Letter.

         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.

         On March 10,  2005,  the Issuer  filed a lawsuit  in  federal  court in
Oklahoma  against the Reporting  Persons,  the JANA Parties and certain of their
respective affiliates.  A copy of the amended complaint filed by the Issuer (the
"Complaint")  is  filed  herewith  as an  exhibit  and  incorporated  herein  by
reference,  and any descriptions  herein of the Complaint are qualified in their
entirety by reference to the Complaint.

         On March 17, 2005,  the  Reporting  Persons sent a letter to the Issuer
(the "Demand Letter"), demanding, pursuant to Delaware law, the right to inspect
certain books and records (including  stockholder list materials) of the Issuer.
A copy of the Demand  Letter is filed  herewith as an exhibit  and  incorporated
herein by  reference,  and any  descriptions  herein of the  Demand  Letter  are
qualified in their entirety by reference to the Demand Letter.

         On March 24, 2005, the Reporting Persons,  the JANA Parties and certain
related parties filed a preliminary proxy statement with the SEC relating to the
solicitation  of proxies on behalf of Carl C. Icahn and Barry S.  Rosenstein  as
candidates for director at the Issuer's 2005 annual meeting of stockholders.

         On March 24, 2005, the Reporting Persons and the JANA Parties agreed to
each pay half of all costs  related to the  solicitation  of proxies  (including
expenditures  for public  relations and financial  advisers,  proxy  solicitors,
advertising,  printing,  transportation and related  expenses),  except that the
Reporting Persons and the JANA Parties will each bear their own legal expenses.

         On April 4 2005,  the  Reporting  Persons and JANA  Partners LLC sent a
letter to the Board of Directors of the Issuer (the "Board  Letter").  A copy of
the Board  Letter is filed  herewith  as an exhibit and  incorporated  herein by
reference,  and any  descriptions  herein of the Board  Letter are  qualified in
their entirety by reference to the Board Letter.

        On April 4, 2005, the Reporting Persons filed an answer to the Complaint
(the "Answer").  A copy of the Answer is filed herewith as an exhibit and
 incorporated herein by reference, and any descriptions herein of the Answer
are qualified in their entirety by reference to the Answer.

         As a  result  of the  foregoing,  the  Reporting  Persons  and the JANA
Parties  may be deemed to be members of a "group"  within the meaning of Section
13(d)(3)  of the Act.  However,  neither  the fact of this  filing nor  anything
contained  herein  shall be deemed to be an  admission  by any of the  Reporting
Persons that they are the beneficial owners of Shares owned by the JANA Parties.

THE  REPORTING  PERSONS,  THE JANA PARTIES 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.


Item 5.  Interest in Securities of the Issuer

Item 5 is hereby amended and restated to read, in its entirety, as follows:

         (a) The  Reporting  Persons may be deemed to  beneficially  own, in the
aggregate,  8,184,100 Shares,  representing  approximately 5.01% of the Issuer's
outstanding  Shares (based upon the 163,442,818  Shares stated to be outstanding
as of March 11, 2005 by the Issuer in the Issuer's definitive proxy statement on
Schedule  14A,  filed with the  Securities  and Exchange  Commission on April 1,
2005).

         (b) High River has sole voting  power and sole  dispositive  power with
regard to  1,636,820  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
3,341,077  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
3,206,203  Shares.  Each of Icahn  Onshore,  CCI  Onshore  and Carl C. 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
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,  CCI  Offshore  and Mr.  Icahn,  by  virtue  of  their
relationships  to Icahn  Master  (as  disclosed  in Item 2),  may be  deemed  to
beneficially  own (as that  term is  defined  in Rule  13d-3  under the Act) the
Shares which Icahn Master  directly  beneficially  owns. Each of Icahn Offshore,
CCI Offshore and Mr. Icahn disclaims beneficial ownership of such Shares for all
other purposes.  Each of Icahn Onshore,  CCI Onshore and Mr. Icahn, by virtue of
their relationships to Icahn Partners (as disclosed in Item 2), may be deemed to
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,
CCI Onshore and Mr. Icahn disclaims  beneficial ownership of such Shares for all
other purposes.

         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
group may be deemed to  beneficially  own Shares owned by the Reporting  Persons
and the JANA Parties.  Upon information and belief, the JANA Parties,  as of the
close of business on April 1, 2005, may be deemed to beneficially  own 4,378,000
Shares in the aggregate.  Accordingly,  the 12,562,100 Shares that may be deemed
to be beneficially owned in the aggregate by the group constitutes approximately
7.7% of the Shares  outstanding.  However,  neither  the fact of this filing nor
anything  contained  herein  shall be  deemed to be an  admission  by any of the
Reporting  Persons  that they are the  beneficial  owners of Shares owned by the
JANA Parties.

         (c) The  following  table sets forth all  transactions  with respect to
Shares effected during the past sixty (60) days by any of the Reporting Persons.
Other than the  purchase of Shares upon  exercise of the JANA  Option,  all such
transactions  were  effected  in  the  open  market,   and  the  table  includes
commissions  paid in per share prices (and, with respect to Shares acquired upon
exercise of options, the table includes option purchase prices paid in per share
prices).



                                                      
----------------- -------------- ------------------- -------------------
                                No. of Shares       Price
 Name            Date           Purchased           Per Share
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       01/24/05                   45,000             60.1318
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       01/25/05                   45,000             60.3339
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       01/26/05                   67,000             59.2852
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       01/26/05                   12,000             60.5174
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       01/28/05                   60,000             60.5075
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       01/31/05                   10,000             60.8514
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       02/03/05                   30,000             62.5149
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       02/04/05                   27,000             62.9524
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       02/24/05                 118,000*             66.1770
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       02/24/05                  30,000*             65.8539
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       02/24/05                  25,400*             64.0752
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       02/24/05                  20,000*             65.9420
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       02/24/05                  300,000             76.4535
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       02/28/05                  125,000             77.1996
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       03/01/05                  50,000*             66.0000
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       03/01/05                  238,600             77.1092
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       03/01/05                  110,000             76.7300
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       03/02/05                  108,200             77.7004
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       03/10/05                   55,000             77.0961
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       03/11/05                   10,000             77.5100
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       03/16/05                   60,000             78.7567
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       03/23/05                   14,100             77.9401
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       03/28/05                   14,000             77.9163
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       03/29/05                   22,520             76.7957
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
High River       03/30/05                   40,000             76.5262
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     01/24/05                   91,800             60.1318
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     01/25/05                   91,800             60.3339
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     01/26/05                  136,680             59.2852
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     01/26/05                   24,480             60.5174
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     01/28/05                  122,400             60.5075
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     01/31/05                   20,400             60.8514
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     02/03/05                   61,200             62.5149
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     02/04/05                   55,080             62.9524
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     02/24/05                 240,700*             66.2058
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     02/24/05                  61,200*             65.8823
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     02/24/05                  51,800*             64.1035
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     02/24/05                  40,800*             65.9700
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     02/24/05                  612,000             76.4535
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     02/28/05                  255,000             77.1996
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     03/01/05                 104,000*             66.0000
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     03/01/05                  486,744             77.1092
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     03/01/05                  224,400             76.7300
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     03/02/05                  220,728             77.7004
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     03/10/05                  112,200             77.0961
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     03/11/05                   20,400             77.5100
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     03/16/05                  122,400             78.7567
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     03/23/05                   28,764             77.9401
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     03/28/05                   28,560             77.9163
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     03/29/05                   45,941             76.7957
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Master     03/30/05                   81,600             76.5262
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   01/24/05                   88,200             60.1318
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   01/25/05                   88,200             60.3339
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   01/26/05                  131,320             59.2852
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   01/26/05                   23,520             60.5174
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   01/28/05                  117,600             60.5075
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   01/31/05                   19,600             60.8514
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   02/03/05                   58,800             62.5149
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   02/04/05                   52,920             62.9524
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   02/24/05                 231,300*             66.2062
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   02/24/05                  58,800*             65.8823
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   02/24/05                  49,800*             64.1035
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   02/24/05                  39,200*             65.9700
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   02/24/05                  588,000             76.4535
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   02/28/05                  245,000             77.1996
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   03/01/05                  96,000*             66.0000
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   03/01/05                  467,656             77.1092
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   03/01/05                  215,600             76.7300
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   03/02/05                  212,072             77.7004
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   03/10/05                  107,800             77.0961
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   03/11/05                   19,600             77.5100
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   03/16/05                  117,600             78.7567
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   03/23/05                   27,636             77.9401
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   03/28/05                   27,440             77.9163
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   03/29/05                   44,139             76.7957
---------------- -------------- ------------------- -------------------
---------------- -------------- ------------------- -------------------
Icahn Partners   03/30/05                   78,400             76.5262
---------------- -------------- ------------------- -------------------


* Shares acquired upon exercise of options 
 (including, where applicable, the JANA Option)


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

Item 6 is hereby amended and restated to read, in its entirety, as follows:

         On March 1, 2005, the Reporting  Persons exercised the JANA Option more
fully  described  in Item 4. A copy of the JANA  Option is filed  herewith as an
exhibit and incorporated herein by reference, and any descriptions herein of the
JANA Option are qualified in their entirety by reference to the JANA Option.

         On  March  2,  2005,  the  Reporting  Persons  sent to the  Issuer  the
Notification  Letter more fully described in Item 4. A copy of the  Notification
Letter is filed herewith as an exhibit and incorporated herein by reference, and
any  descriptions  herein of the  Notification  Letter  are  qualified  in their
entirety by reference to the Notification Letter.

         On March 3, 2005,  the Reporting  Persons and JANA Partners LLC sent to
the Issuer the  Proposed  Transaction  Letter more fully  described in Item 4. A
copy of the  Proposed  Transaction  Letter is filed  herewith  as an exhibit and
incorporated  herein by reference,  and any descriptions  herein of the Proposed
Transaction  Letter are qualified in their entirety by reference to the Proposed
Transaction Letter.

         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.

         On March 10,  2005,  the Issuer  filed a lawsuit  in  federal  court in
Oklahoma  against the Reporting  Persons,  the JANA Parties and certain of their
respective  affiliates.  A copy of the Complaint is filed herewith as an exhibit
and  incorporated  herein  by  reference,  and any  descriptions  herein  of the
Complaint are qualified in their entirety by reference to the Complaint.

         On March 17, 2005, the Reporting  Persons sent to the Issuer the Demand
Letter  more fully  described  in Item 4. A copy of the  Demand  Letter is filed
herewith  as  an  exhibit  and  incorporated   herein  by  reference,   and  any
descriptions  herein of the Demand  Letter are  qualified  in their  entirety by
reference to the Demand Letter.

         On March 24, 2005, the Reporting Persons,  the JANA Parties and certain
related parties filed a preliminary proxy statement with the SEC relating to the
solicitation  of proxies on behalf of Carl C. Icahn and Barry S.  Rosenstein  as
candidates for director at the Issuer's 2005 annual meeting of stockholders.

         On March 24, 2005, the Reporting Persons and the JANA Parties agreed to
each pay half of all costs  related to the  solicitation  of proxies  (including
expenditures  for public  relations and financial  advisers,  proxy  solicitors,
advertising,  printing,  transportation and related  expenses),  except that the
Reporting Persons and the JANA Parties will each bear their own legal expenses.

         On April 4 2005,  the Reporting  Persons and JANA Partners LLC sent the
Board Letter to the Board of Directors of the Issuer. A copy of the Board Letter
is filed herewith as an exhibit and  incorporated  herein by reference,  and any
descriptions  herein of the Board  Letter are  qualified  in their  entirety  by
reference to the Board Letter.

        On April 4, 2005, the Reproting Persons filed the Answer.  A copy of the
 Answer is filed herewith as an exhibit and incorporated herein by reference, 
and any descriptions herein of the Answer are qualified in their entirety by
 reference to the Answer.

         As a  result  of the  foregoing,  the  Reporting  Persons  and the JANA
Parties  may be deemed to be members of a "group"  within the meaning of Section
13(d)(3)  of the Act.  However,  neither  the fact of this  filing nor  anything
contained  herein  shall be deemed to be an  admission  by any of the  Reporting
Persons that they are the beneficial owners of Shares owned by the JANA Parties.

         Except as  described  herein,  none of the  Reporting  Persons  has any
contracts,  arrangements,  understandings or relationships  (legal or otherwise)
with any person with respect to any securities of the Issuer,  including but not
limited to the transfer or voting of any of the securities, finder's fees, joint
ventures,  loan or option  arrangements,  puts or calls,  guarantees of profits,
division of profits or losses, or the giving or withholding of proxies.


Item 7.  Material to be Filed as Exhibits

Item 7 is hereby amended and restated to read, in its entirety, as follows:

1 Joint Filing Agreement of the Reporting Persons (previously filed).
2 Stock Option Agreement among the Reporting Persons and JANA Master Fund Ltd 
  (previously filed).
3 Notification Letter from the Reporting Persons to the Issuer 
   (previously filed).
4 Proposed Transaction Letter from the Reporting Persons and JANA Partners LLC
   to the Issuer (previously filed).
5 Letter from the Reporting Persons and JANA Partners LLC to the Issuer
   (previously filed).
6 Complaint filed by the Issuer against the Reporting Persons and the JANA 
  Parties (previously filed).
7 Letter from the Reporting Persons to the Issuer (previously filed).
8 Letter from the Reporting Persons and JANA Partners LLC to the
  Board of Directors of the Issuer (filed herewith).
9. Answer filed by the Reporting Persons (filed herewith).






                                    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: April 4, 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 #3 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 #3 to Schedule 13D -
                               Kerr-McGee, Inc.]





                                   SCHEDULE A

            DIRECTORS AND EXECUTIVE OFFICERS OF THE REPORTING PERSONS

         Name,  Business  Address and  Principal  Occupation  of Each  Executive
Officer and Director of High River and Barberry.


         The following sets forth the name,  position,  and principal occupation
of each director and executive officer of each of High River and Barberry.  Each
such person is a citizen of the United  States of America.  Except as  otherwise
indicated,  the  business  address  of each  director  and  officer is c/o Icahn
Associates Corp., 767 Fifth Avenue, 47th Floor, New York, New York 10153. To the
best of the Reporting Persons' knowledge,  except as set forth in this statement
on Schedule 13D,  none of the  directors or executive  officers of the Reporting
Persons own any shares of the Issuer.

HIGH RIVER LIMITED PARTNERSHIP

Name                                Position
----                                --------
Hopper Investments LLC              General Partner


BARBERRY CORP.

Name                                Position
----                                --------

Carl C. Icahn                       Chairman, President and Secretary
Jordan Bleznick                     Vice President - Taxes







                                   SCHEDULE B
                                   -----------

         On  January  5,  2001,  Reliance  Group  Holdings,   Inc.  ("Reliance")
commenced  an action  in the  United  States  District  Court  for the  Southern
District of New York against "Carl C. Icahn,  Icahn  Associates  Corp.  and High
River Limited Partnership"  alleging that High River's tender offer for Reliance
9% senior notes violated  Section 14(e) of the Exchange Act.  Reliance  sought a
temporary  restraining order and preliminary and permanent  injunctive relief to
prevent  defendants  from purchasing the notes.  The Court  initially  imposed a
temporary  restraining  order.  Defendants  then  supplemented  the tender offer
disclosures.  The Court conducted a hearing on the disclosures and other matters
raised  by  Reliance.  It  then  denied  plaintiffs'  motion  for a  preliminary
injunction and ordered dissolution of its temporary  restraining order following
dissemination of the supplement.

         Reliance took an immediate appeal to the United States Court of Appeals
for the Second Circuit and sought a stay to restrain  defendants from purchasing
notes  during the  pendency of the appeal.  On January  30,  2001,  the Court of
Appeals denied plaintiff's stay application. On January 30, Reliance also sought
a  further  temporary  restraining  order  from the  District  Court.  The Court
considered the matter and reimposed its original  restraint  until noon the next
day, at which time the restraint was dissolved. The appeal was argued on March 9
and denied on March 22, 2001.