SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549



                                    Form 8-K


                                 CURRENT REPORT



                     Pursuant to Section 13 or 15(d) of the

                         Securities Exchange Act of 1934




                                February 26, 1999
               (Date of Report - Date of earliest event reported)





                             KERR-MCGEE CORPORATION
             (Exact name of registrant as specified in its charter)


      Delaware                      1-3939                      73-0311467
     (State of              (Commission File Number)          (IRS Employer
   Incorporation)                                           Identification No.)



        Kerr-McGee Center
        Oklahoma City, Oklahoma                                   73125
  (Address of principal executive offices)                      (Zip Code)



                                 (405) 270-1313
                         (Registrant's telephone number)





Item 5.  Other Events

         On February  26,  1999,  Oryx Energy  Company,  a Delaware  corporation
("Oryx"), was merged (the "Merger") into Kerr-McGee Corporation  ("Kerr-McGee"),
a Delaware corporation with Kerr-McGee being the surviving corporation, pursuant
to an  Agreement  and Plan of Merger,  dated as of  October  14,  1998,  between
Kerr-McGee  and  Oryx.  As a result of the  Merger  and a  reverse  stock  split
("Reverse  Split")  effected by Oryx  immediately  prior to the Merger,  (i) all
shares of common stock, par value $1.00 per share, of Oryx ("Oryx Common Stock")
owned  by  Kerr-McGee  or held by Oryx  immediately  prior  to the  Merger  were
canceled  and  retired,  and (ii) except as provided in (i),  each share of Oryx
Common Stock issued and outstanding  immediately  prior to the Reverse Split was
converted  into the right to receive  0.369  shares of common  stock,  par value
$1.00 per share, of Kerr-McGee  ("Kerr-McGee Common Stock").  The exchange ratio
of 0.369 to 1.0 was determined by negotiations  between  Kerr-McGee and Oryx. In
the  aggregate,  Kerr-McGee  is  issuing  approximately  40  million  shares  of
Kerr-McGee Common Stock. There were no material relationships between Kerr-McGee
and Oryx prior to the consummation of the merger.

Item 7.  Financial Statements and Exhibits

         Listed  below  the  financial  statements,  financial  information  and
exhibits, if any, filed as a part of this report.

(c)      Exhibits

Exhibit No.                         Description

23.1     Consent of Arthur Andersen LLP

23.2     Consent of PricewaterhouseCoopers LLP

27       Financial data schedules for the twelve months ended December 31, 1998,
         1997 and 1996, and at December 31, 1998,  1997, and 1996.

99       Supplemental  financial  statements  for Kerr-McGee Corporation for the
         three years ended December 31, 1998





                                   SIGNATURES

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                                   KERR-MCGEE CORPORATION


                                              By:(Deborah A. Kitchens)
                                                  Deborah A. Kitchens
                                                  Vice President and Controller

Dated: June 4, 1999





                                  Exhibit Index

Exhibit No.

23.1     Consent of Arthur Andersen LLP

23.2     Consent of PricewaterhouseCoopers LLP

27       Financial data schedules for the twelve months ended December 31, 1998,
         1997 and 1996, and at December 31, 1998, 1997 and 1996.

99       Supplemental  financial  statements  for Kerr-McGee Corporation for the
         three years ended December 31, 1998
[{"type": "8-K", "sequence": "1", "description": "CURRENT REPORT", "secsgml_size_bytes": 3971}]
{"company-data": {"conformed-name": "KERR MCGEE CORP", "cik": "0000055458", "assigned-sic": "1311", "irs-number": "730311467", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-03939", "film-number": "99640371"}, "business-address": {"street1": "KERR MCGEE CTR", "street2": "123 ROBERT S KERR", "city": "OKLAHOMA CITY", "state": "OK", "zip": "73102", "phone": "4052701313"}, "mail-address": {"street1": "P O BOX 25861", "city": "OKLAHOMA CITY", "state": "OK", "zip": "73125"}, "former-company": {"former-conformed-name": "KERR MCGEE OIL INDUSTRIES INC", "date-changed": "19671227"}}
SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    Form 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the

                         Securities Exchange Act of 1934

                                February 26, 1999
               (Date of Report - Date of earliest event reported)

                             KERR-MCGEE CORPORATION
             (Exact name of registrant as specified in its charter)

      Delaware                      1-3939                      73-0311467
     (State of              (Commission File Number)          (IRS Employer
   Incorporation)                                           Identification No.)

        Kerr-McGee Center
        Oklahoma City, Oklahoma                                   73125
  (Address of principal executive offices)                      (Zip Code)

                                 (405) 270-1313
                         (Registrant's telephone number)

Item 5.  Other Events

         On February  26,  1999,  Oryx Energy  Company,  a Delaware  corporation
("Oryx"), was merged (the "Merger") into Kerr-McGee Corporation  ("Kerr-McGee"),
a Delaware corporation with Kerr-McGee being the surviving corporation, pursuant
to an  Agreement  and Plan of Merger,  dated as of  October  14,  1998,  between
Kerr-McGee  and  Oryx.  As a result of the  Merger  and a  reverse  stock  split
("Reverse  Split")  effected by Oryx  immediately  prior to the Merger,  (i) all
shares of common stock, par value $1.00 per share, of Oryx ("Oryx Common Stock")
owned  by  Kerr-McGee  or held by Oryx  immediately  prior  to the  Merger  were
canceled  and  retired,  and (ii) except as provided in (i),  each share of Oryx
Common Stock issued and outstanding  immediately  prior to the Reverse Split was
converted  into the right to receive  0.369  shares of common  stock,  par value
$1.00 per share, of Kerr-McGee  ("Kerr-McGee Common Stock").  The exchange ratio
of 0.369 to 1.0 was determined by negotiations  between  Kerr-McGee and Oryx. In
the  aggregate,  Kerr-McGee  is  issuing  approximately  40  million  shares  of
Kerr-McGee Common Stock. There were no material relationships between Kerr-McGee
and Oryx prior to the consummation of the merger.

Item 7.  Financial Statements and Exhibits

         Listed  below  the  financial  statements,  financial  information  and
exhibits, if any, filed as a part of this report.

(c)      Exhibits

Exhibit No.                         Description

23.1     Consent of Arthur Andersen LLP

23.2     Consent of PricewaterhouseCoopers LLP

27       Financial data schedules for the twelve months ended December 31, 1998,
         1997 and 1996, and at December 31, 1998,  1997, and 1996.

99       Supplemental  financial  statements  for Kerr-McGee Corporation for the
         three years ended December 31, 1998

                                   SIGNATURES

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                                   KERR-MCGEE CORPORATION

                                              By:(Deborah A. Kitchens)
                                                  Deborah A. Kitchens
                                                  Vice President and Controller

Dated: June 4, 1999

                                  Exhibit Index

Exhibit No.

23.1     Consent of Arthur Andersen LLP

23.2     Consent of PricewaterhouseCoopers LLP

27       Financial data schedules for the twelve months ended December 31, 1998,
         1997 and 1996, and at December 31, 1998, 1997 and 1996.

99       Supplemental  financial  statements  for Kerr-McGee Corporation for the
         three years ended December 31, 1998