SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549



                                   Form 8-K/A


                                 CURRENT REPORT



                     Pursuant to Section 13 or 15(d) of the

                         Securities Exchange Act of 1934




                                 August 1, 2001
               --------------------------------------------------
               (Date of Report - Date of earliest event reported)





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


          Delaware                    1-16619                73-1612389
  ------------------------   ------------------------    -------------------
  (State of Incorporation)   (Commission File Number)      (IRS Employer
                                                         Identification No.)



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



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




Item 7.   Financial Statements and Exhibits

    (a)   Financial statements and business acquired

               On May 14, 2001, Kerr-McGee Corporation entered into a definitive
          agreement to acquire HS  Resources,  Inc.  ("HSR") for $1.7 billion in
          cash and stock.  The merger was  approved at a special  meeting of the
          HSR shareholders on August 1, 2001 and HSR common stock ceased trading
          on the New York Stock  Exchange  at close of market on that day.  As a
          result of the merger,  HSR is a wholly-owned  subsidiary of Kerr-McGee
          Corporation.   On August 23, 2001,  HSR was  remamed  Kerr-McGee Rocky
          Mountain Corporation.  The following  financial  information  presents
          HSR's financial position  as of June 30,  2001 and  December  31, 2000
          and results of operations for the first six months and  second quarter
          2001 compared with the same periods in 2000.






                               HS RESOURCES, INC.
                           CONSOLIDATED BALANCE SHEETS
                                   (Unaudited)



                                                          June 30,      December 31,
(Thousands of dollars)                                        2001              2000
                                                       -----------      ------------

                                                                   
Assets
------
Current Assets
  Cash and cash equivalents                            $    2,718        $    1,790
  Margin deposits                                           1,601             1,889
  Accounts receivable
    Oil and gas sales                                      16,233            20,328
    Trading and transportation                             32,389            63,760
    Trade                                                  16,317            12,714
    Ad valorem and production taxes                         2,608             2,562
    Other                                                   2,443             2,097
  Lease and well equipment inventory,
    at cost                                                 1,509               904
  Fair value of derivative asset from
    hedging activities                                      8,623                 -
  Fair value of derivative asset from
    non hedging activities                                 28,369            23,189
  Deferred taxes                                            9,876                 -
  Prepaid expenses and other                                3,501             1,260
  Imbalance receivable                                          -               942
                                                       ----------        ----------
      Total current assets                                126,187           131,435
                                                       ----------        ----------
Oil and Gas Properties, at cost, using
 the successful efforts method
  Undeveloped acreage                                      99,910            90,231
  Costs subject to depreciation,
    depletion and amortization                          1,074,698           997,466
  Less accumulated depreciation,
    depletion and amortization                           (316,648)         (284,737)
                                                       ----------        ----------
      Net oil and gas properties                          857,960           802,960
                                                       ----------        ----------
Gas gathering and transportation facilities,
 at cost, net of accumulated depreciation
 of $6,489 and $4,897 at June 30, 2001 and
 December 31, 2000, respectively                           69,046            57,929
                                                       ----------        ----------
Other Assets
  Deferred charges and other, net                           6,096             7,697
  Fair value of derivative asset from
    hedging activities                                      3,560                 -
  Fair value of derivative asset from
    non hedging activities                                 13,498             2,763
  Office and transportation equipment
    and other property, net of
    accumulated depreciation of $6,513
    and $6,396 at June 30, 2001 and
    December 31, 2000, respectively                         4,202             2,873
  Goodwill, net of accumulated
    amortization of $1,800 and
    $1,620 at June 30, 2001 and
    December 31, 2000, respectively                         1,800             1,980
                                                       ----------        ----------
      Total other assets                                   29,156            15,313
                                                       ----------        ----------
        Total Assets                                   $1,082,349        $1,007,637
                                                       ==========        ==========

Liabilities and Stockholders' Equity
------------------------------------
Current Liabilities
  Accounts payable
    Trade                                              $   46,920        $   39,681
    Revenue                                                32,638            32,277
    Gas purchases                                          14,119            35,035
  Accrued expenses
    Ad valorem and production taxes                        18,064            12,119
    Interest                                                4,500             4,802
    Other                                                   8,660             8,945
  Imbalance payable                                         1,093                 -
  Income taxes payable                                      6,238                 -
  Fair value of derivative liability
    from hedging activities                                33,726                 -
  Fair value of derivative liability
    from non hedging activities                            22,901            16,307
  Payable to KMI                                           13,151            24,419
                                                       ----------        ----------
      Total current liabilities                           202,010           173,585
                                                       ----------        ----------
Accrued Ad Valorem Taxes and Other                         24,546            27,056
Fair value of derivative liability
  from hedging activities                                  13,356                 -
Fair value of derivative liability
  from non hedging activities                               8,313               338
Long-Term Bank Debt                                       236,000           189,000
9-7/8% Senior Subordinated Notes, due
  2003, net of unamortized discount
  of $171 at December 31, 2000                                  -            74,829
9-1/4% Series A Subordinated Notes,
  due 2006, net of unamortized
  discount of $418 and $456 at
  June 30, 2001 and December 31,
  2000, respectively                                      149,582           149,544
9-1/4% Series B Subordinated Notes,
  due 2006, net of unamortized
  discount of $2,855 and $3,121 at
  June 30, 2001 and December 31,
  2000, respectively                                       82,145            81,879
Deferred Income Taxes                                     107,013            89,824

Stockholders' Equity
  Preferred stock                                               -                 -
  Common stock, $.001 per share par
    value, 50,000 shares authorized; 20,133
    and 19,920 shares issued and outstanding
    at June 30, 2001 and December 31, 2000,
    respectively                                               20                20
  Additional paid-in capital                              208,726           201,850
  Other comprehensive loss (Note 3)                       (23,520)                -
  Retained earnings                                       102,328            46,323
  Notes receivable from officers for
    exercise of stock options (Note 5)                     (1,393)           (2,476)
  Deferred compensation                                    (5,205)           (3,459)
  Treasury stock, at cost, 1,839 and
    1,841 shares at June 30, 2001 and
    December 31, 2000, respectively                       (21,572)          (20,676)
                                                       ----------        ----------
      Total stockholders' equity                          259,384           221,582
                                                       ----------        ----------
        Total Liabilities and
          Stockholders' Equity                         $1,082,349        $1,007,637
                                                       ==========        ==========


         The accompanying notes are an integral part of this statement.






                               HS RESOURCES, INC.
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                                   (Unaudited)


                                              Three Months Ended                   Six Months Ended
(Thousands of dollars,                             June 30,                            June 30,
 except per share data)                        2001         2000                  2001          2000
                                            -------      -------              --------      --------

                                                                                
Revenues
  Oil and gas sales                         $86,839      $67,566              $191,141      $129,612
  Trading and trans-
    portation, net                            5,888          501                 9,089         2,034
  Gathering and transmission
    system revenues                           3,329        3,256                 4,795         6,364
  Other gas revenues                            121        2,396                 2,093         4,402
  Income (loss) from
    interest in gathering
    plant                                      (135)         358                  (244)          722
  Interest income and other                     254          992                   646         1,253
                                            -------      -------              --------      --------
      Total revenues                         96,296       75,069               207,520       144,387
                                            -------      -------              --------      --------
Expenses
  Production taxes                            6,601        5,775                14,207        11,243
  Lease operating                             8,465        8,039                16,574        15,063
  Gas transportation costs                    5,579        3,977                10,107         7,884
  Gathering and
    transmission system
    operating expenses                        1,588        1,364                 3,232         2,579
  Depreciation, depletion
    and amortization                         17,074       15,166                33,490        30,021
  Exploratory and
    abandonment                               3,549        3,860                 6,689         6,528
  Geological and geophysical                  3,310        3,661                 6,930         7,211
  Loss (gain) on sale of oil
    and gas properties                          (12)          61                   (12)          161
  General and administrative                  2,850        2,030                 4,343         4,056
  Interest, net of amounts
    capitalized                              10,226       12,692                21,341        24,854
                                            -------      -------              --------      --------
      Total expenses                         59,230       56,625               116,901       109,600
                                            -------      -------              --------      --------
Income before provision
  for income taxes                           37,066       18,444                90,619        34,787
Provision for income taxes -
  current                                     4,562            -                11,791             -
Provision for income taxes -
  deferred                                    8,382        7,027                21,771        13,254
                                            -------      -------              --------      --------
Net income before
  extraordinary item                         24,122       11,417                57,057        21,533
Loss on early extinguishment
  of debt, net of tax
  (Note 7)                                   (1,052)           -                (1,052)            -
                                            -------      -------              --------      --------
Net income                                  $23,070      $11,417              $ 56,005      $ 21,533
                                            =======      =======              ========      ========

Net income per share before
  extraordinary item - basic                $  1.32      $   .62              $   3.13      $   1.16
Extraordinary item                             (.06)           -                  (.06)            -
                                            -------      -------              --------      --------
Net income per share - basic                $  1.26      $   .62              $   3.07      $   1.16
                                            =======      =======              ========      ========
Net income per share before
  extraordinary item -
  diluted                                   $  1.25      $   .60              $   2.98      $   1.12
Extraordinary item                             (.05)           -                  (.05)            -
                                            -------      -------              --------      --------
Net income per share -
  diluted                                   $  1.20      $   .60              $   2.93      $   1.12
                                            =======      =======              ========      ========
Weighted average number of
  common shares outstanding                  18,279       18,471                18,238        18,642
                                            =======      =======              ========      ========
Weighted average number of
  common shares outstanding
  assuming dilution                          19,231       19,186                19,126        19,173
                                            =======      =======              ========      ========


         The accompanying notes are an integral part of this statement.






                               HS RESOURCES, INC.
                 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                                   (Unaudited)



                                                                                           Notes
                                 Common Stock    Additional      Other        Retained   Receivable                 Treasury Stock
                               ----------------    Paid-In    Comprehensive   Earnings      from       Deferred    ----------------
(Thousands)                    Shares    Amount    Capital   Income (Loss)    (Deficit)   Officers   Compensation  Shares    Amount
                               ------    ------  ----------  --------------  ----------  ----------  ------------  ------  --------

                                                                                                
Balance, December 31, 1999     19,528     $20     $191,406     $      -      $(14,302)    $(2,386)    $(1,981)      (731)  $ (7,750)
  Purchase of treasury
    stock                           -       -          746            -             -           -           -     (1,172)   (13,598)
  Transfer of treasury
    stock to 401(k) Plan            -       -          385            -             -           -           -         62        672
  Issuance of restricted
    stock                          26       -          524            -             -           -        (524)         -          -
  Amortization of deferred
    compensation                    -       -            -            -             -           -       1,507          -          -
  Issuance of performance
    shares                        100       -        2,519            -             -           -      (2,519)         -          -
  Restricted stock and
    performance shares
    forfeited                      (9)      -          (58)           -             -           -          58          -          -
  Exercise of warrants
    and options                   275       -        6,328            -             -      (1,601)          -          -          -
  Interest on notes
    receivable                      -       -            -            -             -        (113)          -          -          -
  Payment of officer notes
     and interest                   -       -            -            -             -       1,624           -          -          -
  Net income                        -       -            -            -        60,625           -           -          -          -
                               ------     ---     --------     --------      --------     -------     -------      -----   --------
Balance, December 31, 2000     19,920      20      201,850            -        46,323      (2,476)     (3,459)    (1,841)   (20,676)
  Cumulative effect of
    change in accounting
    principle                       -       -            -      (86,700)            -           -           -          -          -
  Other comprehensive
    income                          -       -            -       63,180             -           -           -          -          -
  Purchase of treasury
    stock                           -       -            -            -             -           -           -        (31)    (1,266)
  Transfer of treasury
    stock to 401(k) Plan            -       -          950            -             -           -           -         33        370
  Issuance of restricted
    stock                           9       -          354            -             -           -        (354)         -          -
  Amortization of deferred
    compensation                    -       -            -            -             -           -       1,135          -          -
  Issuance of performance
    shares                         60       -        2,527            -             -           -      (2,527)         -          -
  Exercise of options             144       -        3,045            -             -           -           -          -          -
  Interest on notes
    receivable                      -       -            -            -             -         (83)          -          -          -
  Payment of officer notes
    and interest                    -       -            -            -             -       1,166           -          -          -
  Net income                        -       -            -            -        56,005           -           -          -          -
                               ------     ---     --------     ---------     --------     -------     -------      -----   --------
Balance, June 30, 2001         20,133     $20     $208,726     $(23,520)     $102,328     $(1,393)    $(5,205)    (1,839)  $(21,572)
                               ======     ===     ========     =========     ========     =======     =======      =====   ========






                               HS RESOURCES, INC.
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (Unaudited)


                                                            June 30,
(Thousands of dollars)                                  2001         2000
                                                    ---------     -------

                                                             
Cash Flows from Operating Activities
------------------------------------
  Net income                                          $56,005      $21,533
  Adjustments to reconcile net income
    to net cash provided by operating
    activities
      Depreciation, depletion and
        amortization                                   33,490       30,021
      Depreciation expense offset
        against income                                    819          635
      Write off of deferred charges
        and prepayment premiums                         1,710            -
      Impairment and (gain) loss on
        sales of oil and gas
        properties                                        (12)         161
      Amortization of deferred
        charges, debt issue costs
        and deferred compensation                       2,525        2,117
      Surrendered and expired acreage                   2,675        3,087
      Transfer of treasury stock to
        401(k) Plan                                     1,321        1,057
      Deferred income tax provision                    21,343       12,925
      Decrease (increase) in accounts
        and notes receivable                           28,998      (30,763)
      (Decrease) increase in accounts
        payable and accrued expenses                     (611)      28,506
      Other                                              (693)        (717)
                                                    ---------     --------
          Net cash provided by
            operating activities                      147,570       68,562
                                                    ---------     --------
Cash Flows from Investing Activities
------------------------------------
  Exploration, development and
    leasehold costs                                   (73,692)     (52,908)
  Purchase of proved and unproved
    properties                                        (15,945)      (7,455)
  Gas gathering and transmission
    facilities additions                              (12,708)      (1,812)
  Other property additions                             (1,943)        (231)
  Net proceeds from the sale of oil
    and gas properties                                     50          102
  Increase in property related
    payables                                           (3,618)      (3,148)
                                                    ---------     --------
          Net cash used in
            investing activities                     (107,856)     (65,452)
                                                    ---------     --------
Cash Flows from Financing Activities
------------------------------------
  Proceeds from bank debt                             210,000      102,000
  Repayments of bank debt                            (163,000)     (85,000)
  Repayment of senior subordinated
    notes plus premium                                (75,938)           -
  Repayment of KMI debt                               (11,269)      (9,495)
  Exercise of options and warrants                      1,521        3,394
  Purchase of treasury stock                           (1,266)      (8,048)
  Payment of officer notes and
    interest                                            1,166            -
                                                    ---------     --------
          Net cash (used in) provided
            by financing activities                   (38,786)       2,851
                                                    ---------     --------
Net Increase in Cash and Cash
  Equivalents                                             928        5,961
    Cash and cash equivalents,
      beginning of year                                 1,790          518
                                                    ---------     --------
    Cash and cash equivalents,
      end of period                                 $   2,718     $  6,479
                                                    =========     ========
Supplemental Cash Flow Disclosure
  Interest paid, net of capitalized
    interest                                        $  20,281     $ 23,342
  Cash paid for income taxes, net of
    reimbursements                                  $   3,026     $    206
  Schedule of noncash investing and
    financing activities
      Issuance of performance shares
        and restricted stock                        $   2,882     $  2,977
      Tax benefit on stock option
        exercises                                   $   1,525     $      -



         The accompanying notes are an integral part of this statement.






                               HS RESOURCES, INC.
              NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS


NOTE 1.  GENERAL

On May 14, 2001, HS Resources,  Inc. ("HSR") entered into a definitive agreement
to be acquired by Kerr-McGee Corporation for $1.7 billion in cash and stock. The
merger was approved at a special  meeting of the HSR  shareholders  on August 1,
2001. HSR  shareholders  have the opportunity to elect to receive either cash or
stock, subject to proration so that 70% of the total HSR shares are acquired for
$66 in cash and 30% are  acquired in  exchange  for .9404  shares of  Kerr-McGee
Corporation  stock.  As a result  of this  merger,  HSR  became  a  wholly-owned
subsidiary of Kerr-McGee Corporation.

HSR is a Delaware corporation and was originally organized in January 1987. HSE,
directly or through subsidiaries, acquires, develops, exploits, explores for and
produces  oil and gas  properties.  The  primary  properties  are located in the
Denver-Julesburg  ("D-J") Basin,  the onshore area of the  Texas-Louisiana  Gulf
Coast, and to a lesser extent,  the  Mid-Continent and Northern Rocky Mountains.
Through  wholly-owned  subsidiaries,  HS Gathering L.L.C. and Resource Gathering
Systems, Inc., HSE and third party gas is gathered and transported.  Through the
wholly-owned  subsidiary,  HS Energy Services, Inc. ("HSES"), HSR gas production
and gas owned by third parties is marketed.  Additionally,  HSES actively trades
both physical and financial positions in the gas commodities market.

The  interim   financial  data  presented  here  is  unaudited;   however,   all
adjustments,  which are of a normal and recurring  nature,  have been made which
are, in the opinion of management, necessary for a fair and consistent statement
of financial position at June 30, 2001, and results of operations and cash flows
for the interim periods  presented.  Because of various  factors,  including the
merger with Kerr-McGee Corporation,  the results of operations for these periods
are not necessarily  indicative of results to be expected for the full year. For
a more complete  understanding of HSR operations and financial  position,  these
statements  should  be read  in  conjunction  with  the  HSR  audited  financial
statements  and notes  thereto  included in the December 31, 2000 Report on Form
10-K filed with the Securities and Exchange Commission on March 2, 2001. Certain
prior  year  amounts  have  been   reclassified  to  conform  with  the  current
presentation.

NOTE 2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Successful Efforts. HSR utilizes the successful efforts method of accounting for
oil and gas  properties.  Consequently,  leasehold  costs are  capitalized  when
incurred.   Unproved  properties  are  assessed   periodically  within  specific
geographic  areas, and impairments in value are charged to expense.  Exploratory
costs,  geological  and  geophysical  expenses and delay  rentals are charged to
expense as incurred.  Exploratory drilling costs are initially capitalized,  but
charged to expense if and when the well is determined to be unsuccessful.  Costs
of  developmental   dry  holes  and  proved  leaseholds  are  amortized  on  the
unit-of-production   method  based  on  proved  reserves  and  calculated  on  a
field-by-field  basis.  The  depreciation of capitalized  drilling costs is also
based on the  unit-of-production  method  using proved  developed  reserves on a
field-by-field basis.

Financial  Instruments.  HSR  engages  in price  and  location  risk  management
activities  for both hedging and trading  purposes.  HSR enters into  derivative
instruments  for  hedging  purposes  in order to  manage  exposure  to price and
location  risks in the marketing of oil and gas  production  and, in the case of
HSES marketing  activities,  third party gas. All derivatives are recorded as an
asset or liability and are  marked-to-market  each reporting  period.  Gains and
losses on the  effective  portion of hedging  positions  designated as cash flow
hedges are deferred in other  comprehensive loss and recognized in operations in
the period the  underlying  physical  transactions  occur in "oil and gas sales"
(for company-owned  production) and "trading and  transportation  revenues" (for
third party gas).  Activities  for trading  purposes are accounted for using the
marked-to-market  method.  Under this  method,  changes  in the market  value of
outstanding financial instruments are recognized as a gain or loss in the period
of change on a net basis in "trading and  transportation  revenues."  The market
prices  used to value  these  derivatives  reflect  management's  best  estimate
considering  various factors  including  closing  exchange and  over-the-counter
quotations,  time value and volatility factors  underlying the commitments.  The
values of trading  derivatives  are adjusted to reflect the potential  impact of
liquidating  the position in an orderly manner over a reasonable  period of time
under present market conditions.

NOTE 3.  NEW ACCOUNTING STANDARDS

On January 1, 2001,  HSR adopted SFAS 133,  "Accounting  for Certain  Derivative
Instruments  and  Certain  Hedging  Activities."  SFAS 133  requires  that every
derivative  instrument be recorded on the balance sheet as an asset or liability
measured at its fair value and that  changes in the  derivative's  fair value be
recognized  currently in earnings unless specific hedge accounting  criteria are
met.  Prior to January 1,  2001,  company  personnel  completed  the  process of
identifying  all  derivative  instruments,  determining  fair  market  values of
derivatives, designating and documenting hedge relationships, and evaluating the
effectiveness of those hedge relationships.

SFAS  133  requires  that as of the date of  initial  adoption,  the  difference
between the fair market value of derivative  instruments recorded on the balance
sheet and the previous  carrying  amount of those  derivatives  be reported as a
transition adjustment in net income or other comprehensive loss, as appropriate,
as the cumulative effect of a change in accounting  principle in accordance with
APB 20, "Accounting Changes."

HSR uses  financial  derivative  instruments  to mitigate  commodity  price risk
related to the purchase or sale of natural gas.  Many of these  instruments  are
designated as hedges of the anticipated purchases or sales of the commodity. HSR
also uses  interest rate swaps,  which are  designated as hedges of the interest
rate on  company  borrowings.  As of June  30,  2001,  $80  million  of  company
borrowings were hedged at a fixed LIBOR rate of 5.86% through  December 15, 2006
and $50 million of borrowings were hedged at a fixed LIBOR rate of 5.66% through
March 31, 2004. On January 1, 2001,  the fair market values of these  derivative
instruments  and interest rate swaps were recorded as assets and  liabilities on
the balance sheet and in accumulated other comprehensive loss in accordance with
the transition  provisions of SFAS 133. Future changes in the fair market values
of these  instruments and interest rate swaps, to the extent that the hedges are
effective at mitigating the underlying commodity risk, will be recorded in other
comprehensive  loss. At the date the underlying  transaction occurs, the amounts
accumulated  in other  comprehensive  loss will be reported in the  Consolidated
Statements of Operations.  To the extent that the hedges are not effective,  the
ineffective  portion  of the  changes  in fair  market  value  will be  recorded
directly  in  operations.  On August 3,  2001,  both  interest  rate  swaps were
terminated for $4.0 million. This amount will be recorded in the third quarter.

For the three months ended June 30, 2001 and 2000, hedging contracts for company
production  reduced  oil and gas  sales  by $20.3  million  and  $13.8  million,
respectively.  Hedging  contracts  for third  party gas  decreased  trading  and
transportation  revenues by $2.8 million and $0.4 million,  for the three months
ended June 30, 2001 and 2000,  respectively.  For the six months  ended June 30,
2001 and 2000,  hedging  contracts  for company  production  reduced oil and gas
sales by $69.2 million and by $18.5 million, respectively. Hedging contracts for
third party gas increased  trading and  transportation  revenues by $4.4 million
for the six months ended June 30, 2001 and decreased trading and  transportation
revenues  by $0.3  million  for the six  months  ended June 30,  2000.  Based on
current futures market prices,  which fluctuate  daily,  and assuming no further
changes in the  contracts,  losses would be recorded over the next twelve months
of  $10.0  million  in oil and gas  sales  and  $14.5  million  in  trading  and
transportation  revenues  relating  to  hedging  contracts.   Changes  to  these
contracts may occur as a result of the merger with Kerr-McGee  Corporation  (see
Note 1).

In September 2000, the Emerging Issues Task Force reached consensus on Issue No.
00-10,  "Accounting  for  Shipping  and  Handling  Fees and Costs"  ("EITF Issue
00-10").  EITF Issue 00-10 requires  retroactive  restatement of  transportation
costs as an expense rather than as a reduction to revenue.  HSR implemented EITF
Issue 00-10 in the fourth  quarter of 2000 and all prior  periods were  restated
with  offsetting  increases in oil and gas sales revenue and gas  transportation
costs resulting in no impact to net earnings.

In June 2001,  SFAS No. 141 "Business  Combinations"  and SFAS No. 142 "Goodwill
and  Other   Intangible   Assets"  were  issued,   which  require  all  business
combinations  to be  accounted  for using the  purchase  method and  changes the
treatment of goodwill created in a business  combination.  The adoption of these
two statements is not expected to have an impact on HSR.

Additionally,  SFAS No. 143 "Accounting for Asset  Retirement  Obligations"  was
issued.  This standard requires entities to record the fair value of a liability
for an asset retirement  obligation in the period in which it is incurred.  When
the  liability  is  initially  recorded,  the  entity  capitalizes  the  cost by
increasing the carrying  amount of the related  long-lived  asset.  The asset is
then  depreciated  over its  estimated  useful  life.  The present  value of the
inherent  obligation is adjusted each reporting  period.  The impact of adopting
this statement on January 1, 2003 has not yet been determined by HSR.

NOTE 4.  ISSUANCE OF PERFORMANCE SHARES

The 2000  Performance  and Equity  Incentive  Plan (the  "Plan")  allows for the
issuance of performance shares to employees, officers and directors. Accelerated
vesting of such shares is dependent  on our  attainment  of defined  performance
goals.  These  shares  have  a  base  vesting  schedule  over  nine  years  with
accelerated  vesting of up to one-fourth of the shares in each of the first four
years if the  performance  goals are achieved,  and  accelerated  vesting upon a
change of control.  In the first quarter of 2001, HSR issued 60,000  performance
shares under the Plan and recorded deferred  compensation of approximately  $2.5
million.  On  August  1,  2001  as  a  result  of  the  merger  with  Kerr-McGee
Corporation, the vesting of all performance shares was accelerated (see Note 1).

NOTE 5.  RELATED PARTY TRANSACTIONS

In December 2000,  full recourse notes in the amount of $1.6 million were issued
to HSR by certain of HSR  officers  in  connection  with the  exercise  of stock
options.  The  notes  and  accrued  interest  are due and  payable  on or before
December 31, 2001.  The interest rate on these notes is at a fixed rate of 9.5%.
In the first quarter of 2001 one of the notes and  associated  accrued  interest
was repaid.  The remaining  notes and accrued  interest were repaid on August 2,
2001 in connection with the merger with Kerr-McGee Corporation.

NOTE 6.  TERMINATION OF SECTION 29 TAX CREDIT AGREEMENTS

Effective  April 1, 2001, HSR  terminated  its Section 29 tax credit  agreements
with two unaffiliated third parties. Under the agreements, the company exercised
its option to repurchase all of the oil and gas interests previously assigned to
the third parties for $15.9 million at closing plus quarterly  payments  through
December  31,  2002 in the  amount of  $0.8385  of each  dollar  of tax  credits
available  under  Section  29  of  the  Internal  Revenue  Code.  HSR  currently
anticipates  being able to utilize these tax credits  against current income tax
obligations,  and  therefore,  anticipate  retaining  a  cash  flow  benefit  of
approximately $0.16 for each dollar of tax credits available to us under Section
29.

NOTE 7.  EXTRAORDINARY ITEM - LOSS ON EARLY EXTINGUISHMENT OF DEBT

On June 1, 2001, the company's $75 million 9 7/8% senior  subordinated notes due
in 2003 were redeemed.  The company recorded as an extraordinary  item a premium
of  $937,500  as well as  $772,954 of  previously  incurred  issuance  costs and
discounts  associated  with the notes.  These amounts have been  reflected as an
extraordinary loss (net of related tax benefits of $658,525) on the consolidated
statement of operations.

Note 8.  BUSINESS SEGMENT INFORMATION

HSE is an independent energy company engaged in the following activities:

   *  acquisition, development, exploitation, exploration and production of  oil
      and gas.

   *  transportation,  marketing  and  trading  of  oil  and gas and oil and gas
      financial positions.





                                           Three Months Ended                    Six Months Ended
                                                June 30,                             June 30,
(Thousands of dollars)                     2001          2000                   2001          2000
                                        --------      --------               --------      --------

                                                                               
Operating Revenues:
  Oil and gas sales
    D-J Basin                           $ 74,857      $ 55,568               $162,292      $110,592
  Oil and gas sales
    Gulf Coast                            11,718        14,313                 29,875        23,290
  Oil and gas sales
    Mid-Continent and other                  385            81                  1,067           132
  Gas gathering and trans-
    portation facilities                   3,194         3,614                  4,551         7,086
  Trading and transportation
    net                                    7,933         1,301                 13,415         3,502
  Intersegment eliminations,
    net                                   (2,045)         (800)                (4,326)       (1,469)
                                        --------      --------               --------      --------
                                        $ 96,042      $ 74,077               $206,874      $143,133
                                        ========      ========               ========      ========
Operating Income (Loss):
  D-J Basin                             $ 42,767      $ 25,807               $ 97,894      $ 52,312
  Gulf Coast                               2,928         5,490                 11,149         8,063
  Mid-Continent and other                 (2,626)       (1,309)                (2,464)       (3,314)
  Gas gathering and trans-
    portation facilities                     530           780                 (1,046)        1,417
  Trading and transportation               7,789         1,192                 13,139         3,285
  Intersegment eliminations               (2,045)         (800)                (4,326)       (1,469)
                                        --------      --------               --------      --------
Operating Income                          49,343        31,160                114,346        60,294
  Other income and expense               (12,277)      (12,716)               (23,727)      (25,507)
                                        --------      --------               --------      --------
Income before income taxes              $ 37,066      $ 18,444               $ 90,619      $ 34,787
                                        ========      ========               ========      ========
Identifiable Assets (net)
  (at June 30):
  Oil and gas properties
    D-J Basin                           $789,310      $745,841               $789,310      $745,841
  Oil and gas properties
    Gulf Coast                            55,814        39,779                 55,814        39,779
  Oil and gas properties
    Mid-Continent and other               13,942         8,211                 13,942         8,211
  Gas gathering and trans-
    portation facilities                  69,046        53,086                 69,046        53,086
  Trading and transportation               2,679         2,256                  2,679         2,256
  Corporate                                2,217         1,861                  2,217         1,861
                                        --------      --------               --------      --------
                                        $933,008      $851,034               $933,008      $851,034
                                        ========      ========               ========      ========

Depreciation, Depletion and
  Amortization Expense:
  Oil and gas properties
    D-J Basin                           $ 12,914      $ 12,938               $ 25,625      $ 25,820
  Oil and gas properties
    Gulf Coast                             3,415         1,640                  6,396         3,001
  Oil and gas properties
    Mid-Continent and other                   72            23                    140            43
  Gas gathering and trans-
    portation facilities                     324           266                    625           542
  Trading and transportation                 144           109                    276           217
  Corporate                                  205           190                    428           398
                                        --------      --------               --------      --------
                                        $ 17,074      $ 15,166               $ 33,490      $ 30,021
                                        ========      ========               ========      ========
Capital Expenditures and
  Acquisitions:
  Oil and gas properties
    D-J Basin                           $ 43,644      $ 23,308               $ 65,543      $ 43,041
  Oil and gas properties
    Gulf Coast                            11,094         6,240                 22,703        15,115
  Oil and gas properties
    Mid-Continent and other                2,079           820                  1,749         2,249
  Gas gathering and trans-
    portation facilities                   9,276         1,561                 12,708         1,812
  Trading and transportation                 101             9                    894            13
  Corporate                                   36           114                    691           176
                                        --------      --------               --------      --------
                                        $ 66,230      $ 32,052               $104,288      $ 62,406
                                        ========      ========               ========      ========







   Item 7.  Financial Statements and Exhibits

       (b)  Pro forma financial information
               The  following  unaudited  pro forma  financial  statements  give
            effect  to  the  merger  between   Kerr-McGee   Corporation  and  HS
            Resources,   Inc.  and  present  the  combined  company's  financial
            position as of June 30, 2001 and results of operations for the first
            six months of 2001 and twelve months ended December 31, 2000.  These
            pro  forma  statements   update  those  presented   in  Kerr-McGee's
            Registration  Statement on Form S-4 filed on June 28, 2001 (File No.
            333-61898).

               Documents incorporated by reference:
               *  Kerr-McGee  Corporation's  Form  10-K   for  the   year  ended
                  December 31, 2000
               *  Kerr-McGee  Corporation's  Form 10-Q  for  the  quarter  ended
                  June 30, 2001
               *  HS Resources' Form 10-K for the year ended December 31, 2000


                    UNAUDITED PRO FORMA FINANCIAL STATEMENTS


               The  following  unaudited  pro forma  financial  statements  give
            effect to the merger  based on the factors set forth below and after
            giving  effect  to  the  pro  forma  adjustments  described  in  the
            accompanying  notes.  The unaudited pro forma  financial  statements
            have been prepared from, and should be read in conjunction with, the
            historical  consolidated  financial  statements and notes thereto of
            Kerr-McGee  and HS Resources,  which are  incorporated  by reference
            into  this  document  and  the HS Resources June 30, 2001 statements
            included herein.

               The unaudited pro forma  financial  statements  and related notes
            are  presented  for  illustrative  purposes  only.  If the shares of
            Kerr-McGee  common  stock  issuable in the merger had been issued in
            the past,  Kerr-McGee's  financial position or results of operations
            might have been different from those  presented in the unaudited pro
            forma  financial  statements.  The  unaudited  pro  forma  financial
            statements  should  not  be  relied  upon  as an  indication  of the
            financial  position or results of operations that  Kerr-McGee  would
            have  achieved if this  issuance  and the merger had occurred at the
            dates indicated. You also should not rely on the unaudited pro forma
            financial  statements  as an  indication  of  the  future  operating
            results or financial position that the merged companies will achieve
            after the merger.

               The unaudited pro forma financial  statements were prepared based
            on the following:

            *  Kerr-McGee  purchased all  the outstanding shares of common stock
               of  HS  Resources  and  assumed  its  debt.  Kerr-McGee  paid  an
               aggregate  of $833  million in cash (at $66 per share) and issued
               an aggregate of 5,090,230 shares of Kerr-McGee common stock (at a
               fixed exchange  ratio of .9404 shares of Kerr-McGee  common stock
               for  each  share  of HS  Resources  common  stock).  The cash was
               financed under existing Kerr-McGee debt facilities.

            *  The  unaudited  pro forma  balance  sheet has been prepared as if
               the merger  occurred on June 30, 2001.  The  unaudited  pro forma
               statement of income has been  prepared as if the merger  occurred
               on January 1, 2000.

            *  The merger was  accounted  for  as a  purchase of HS Resources by
               Kerr-McGee.

            *  Kerr-McGee  and  HS  Resources  utilize  the  successful  efforts
               method of accounting for oil and gas activities.

            *  In June 2001, the Financial  Accounting  Standards  Board  (FASB)
               issued Financial Accounting Standard No. 142, "Goodwill and Other
               Intangible  Assets," which  provided that goodwill  acquired in a
               business combination occurring after June 30, 2001, should not be
               amortized.  Instead,  the  FASB  required  impairment  tests  for
               goodwill  balances  (comparison  of the fair value of a reporting
               unit to its  carrying  amount).  Since the merger of HS Resources
               occurred  after June 30, 2001,  no  amortization  of goodwill has
               been reflected in the pro forma statements.

            *  Targeted  annual  selling  and general  expense  savings of $5 to
               $10  million  have not been  reflected  as an  adjustment  to the
               historical  data.  These cost savings are expected to result from
               the  consolidation  of certain  offices  and the  elimination  of
               duplicate corporate staff and expenses.


            No  pro forma  adjustments  have  been  made  with  respect  to  the
         following  unusual  items.  These items are reflected in the historical
         results of  Kerr-McGee  and HS Resources, as applicable, and should  be
         considered when making period-to-period comparisons.

            *  On January 1, 2001,  both  Kerr-McGee  and  HS Resources  adopted
               Financial  Accounting  Standard  No. 133,  as amended  (FAS 133),
               "Accounting for Derivative  Instruments and Hedging  Activities."
               This standard requires all derivative  instruments to be recorded
               as assets or liabilities,  measured at fair value, and changes in
               the  derivative's  fair  value  to  be  recognized  currently  in
               earnings unless specific hedge accounting criteria are met.

               Kerr-McGee  hedges  certain  foreign  currency risks (future cash
            flows  for  certain  non-U.S.  capital  expenditures  and  operating
            expenses).  Kerr-McGee also has derivative  instruments that are not
            hedges (options associated with Kerr-McGee debt exchangeable for the
            Devon Energy  Corporation  (Devon)  common stock owned by Kerr-McGee
            and foreign currency forward sales contracts associated with certain
            foreign  currency  denominated  chemical  accounts  receivable).  In
            adopting FAS 133, Kerr-McGee recognized an expense of $20 million in
            the first quarter of 2001 as a cumulative  effect of the  accounting
            change.  This  amount  is not  reflected  in the  pro  forma  income
            statement.  Also in adopting FAS 133, Kerr-McGee chose to reclassify
            85% of the Devon shares owned from the "available for sale" category
            of  investments  to "trading"  and  recognized  other income of $181
            million  ($118  million  after  tax)  on  January  1,  2001, for the
            unrealized   appreciation  on  the  Devon  shares   reclassified  to
            "trading".  After adoption of FAS 133, the "trading"  securities are
            marked  to  market  through  income  each  month.  A  more  complete
            description of Kerr-McGee's derivatives is contained in Kerr-McGee's
            Quarterly  Report on  Form 10-Q for the quarter ended June 30, 2001,
            which is incorporated herein by reference.

               HS Resources uses  derivative  instruments to mitigate  commodity
            price risks  related to the  purchase or sale of oil and natural gas
            and  interest  rate  swaps to hedge the  interest  rates on  certain
            borrowings. For the six months of 2001 and the year 2000, sales were
            reduced  by $65  million  and  $72  million,  respectively,  for the
            commodity price hedges. The change in the fair value of the interest
            rate swaps has been  reflected in the fair value of the  derivatives
            in the historical HS Resources  balance  sheet,  but will not affect
            income   until  the  swaps  are  settled.   Additional   information
            concerning these derivatives  is  contained in this Form 8-K/A under
            Item 7.(a), which contains the HS Resources June 30, 2001, financial
            statements, and  in  the HS Resources Annual Report on Form 10-K for
            the  year  ended  December 31, 2000, which is incorporated herein by
            reference.

            *  During   the  six   months  ended   June  30,  2001,   Kerr-McGee
               recognized  a  pre-tax  special  item  of  $25  million  for  the
               termination  of  manganese  metal  production  at  the  Hamilton,
               Mississippi electrolytic chemical facility. This charge primarily
               related  to plant and  equipment  write-offs  and other  closings
               costs, including severance.



                                  UNAUDITED PRO FORMA BALANCE SHEET
                                            June 30, 2001


                                                      Kerr-McGee       HSR         Pro Forma      Pro Forma
                                                      Historical   Historical     Adjustments       Total
                                                      ----------   ----------     -----------     ---------
                                                                    (Millions of dollars)
           ASSETS

                                                                                       
Current assets
  Cash                                                   $   197       $    3       $    -         $   200
  Notes and accounts receivable                              613           72            -             685
  Inventories                                                434            1            -             435
  Deposits, prepaids, and other                              114           50            -             164
                                                         -------       ------       ------         -------
      Total current assets                                 1,358          126            -           1,484
                                                         -------       ------       ------         -------

Property, Plant and Equipment                             13,553        1,261          872  (a)     15,686
  Less reserves for depreciation, depletion                                                              -
            and amortization                               7,710          330         (330) (a)      7,710
                                                         -------       ------       ------         -------
                                                           5,843          931        1,202           7,976
                                                         -------       ------       ------         -------
Goodwill                                                       -            2          300  (a)        302
Investments and other assets                                 940           23           (6) (a)        957
                                                         -------       ------       ------         -------
      Total assets                                       $ 8,141       $1,082       $1,496         $10,719
                                                         =======       ======       ======         =======



LIABILITIES AND STOCKHOLDERS' EQUITY

Current Liabilties
  Short-term borrowings                                  $     7       $    -       $    -         $     7
  Accounts payable                                           803           94            -             897
  Long-term debt due within on year                          198           13            -             211
  Other current liabilities                                  486           95            -             581
                                                         -------       ------       ------         -------
    Total current liabilities                              1,494          202            -           1,696
                                                         -------       ------       ------         -------

Long-term debt                                             2,195          468          969  (a)      3,632
                                                         -------       ------       ------         -------
Deferred credits and reserves                              1,535          153          428  (a)      2,116
                                                         -------       ------       ------         -------
Stockholders' equity
  Common stock                                               102            -            5  (a)        107
  Restricted stock                                            11            -            -              11
  Capital in excess of par value                           1,682          209         (209) (b)      2,035
                                                                                       353  (a)
  Preferred stock rights                                       1            -            -               1
  Retained earnings                                        1,659          102         (102) (b)      1,659
  Accumulated other comprehensive income (loss)              (68)         (23)          23  (b)        (68)
  Common stock in treasury, at cost                         (378)         (22)          22  (b)       (378)
  Deferred compensation                                      (92)          (7)           7  (b)        (92)
                                                         -------       ------       ------         -------
                                                           2,917          259           99           3,275
                                                         -------       ------       ------         -------
      Total liabilities and stockholders' equity         $ 8,141       $1,082       $1,496         $10,719
                                                         =======       ======       ======         =======


See accompanying notes to Unaudited Pro Forma Financial Statements.





                                    UNAUDITED CONSOLIDATED PRO FORMA STATEMENT OF INCOME


                                             Six Months Ended June 30, 2001               Twelve Months Ended December 31, 2000
                                    ----------------------------------------------    ----------------------------------------------
                                    Historical  Historical   Pro Forma   Pro Forma    Historical  Historical   Pro Forma   Pro Forma
                                    Kerr-McGee     HSR      Adjustments    Income     Kerr-McGee     HSR      Adjustments    Income
                                    ----------  ----------  -----------  ---------    ----------  ----------  -----------  ---------
                                                            (Millions of dollars, except per-share amounts)

                                                                                                     
Sales                                 $1,997        $207         $  -       $2,204      $4,121       $459        $(136) (f)  $4,444
                                      ------        ----         ----       ------      ------       ----        -----       ------
Costs and Expenses
   Costs and operating
     expenses                            605          20            -          625       1,269        170         (133) (f)   1,306
   Selling,general and
     administrative expenses             114           4            -          118         298          9            -          307
   Shipping and handling
     expenses                             57          10            -           67          97         16            -          113
   Depreciation and depletion            341          34           28  (c)     403         684         60           51  (c)     795
   Exploration, including dry
     holes and amortizaton of
     undeveloped leases                   94          14            -          108         170         30            -          200
   Taxes, other than income
     taxes                                63          14            -           77         122         26            -          148
   Purchased in-process research
     and development                       -           -            -            -          32          -            -           32
   Interest and debt expense              80          21           35  (d)     136         208         49           70  (d)     327
                                      ------        ----         ----       ------      ------       ----        -----       ------
       Total Costs and Expenses        1,354         117           63        1,534       2,880        360          (12)       3,228
                                      ------        ----         ----       ------      ------       ----        -----       ------
                                         643          90          (63)         670       1,241         99         (124)       1,216
Other Income                             201           -            -          201          58          -            3  (f)      61
                                      ------        ----         ----       ------      ------       ----        -----       ------
Income from Operations before
   Income Taxes                          844          90          (63)         871       1,299         99         (121)       1,277

Taxes on Income                         (314)        (33)          23  (e)    (324)       (457)       (38)          44  (e)    (451)
                                      ------        ----         ----       ------      ------       ----       ------       ------
Income from Continuing Operations     $  530        $ 57         $(40)      $  547      $  842       $ 61       $  (77)      $  826
                                      ======        ====         ====       ======      ======       ====       ======       ======

Income from Continuing Operations
   per Share
   Basic                              $ 5.58      $ 3.13                    $ 5.47      $ 9.01     $ 3.29                    $ 8.38

   Diluted                            $ 5.11      $ 2.98                    $ 4.90      $ 8.37     $ 3.18                    $ 7.57

HS Resources Pro Forma Equivalent
   Earnings per Share                                                       $ 4.61                                           $ 7.12

Average Common Shares
   Outstanding (thousands)            94,843      18,238                    99,933      93,406     18,420                    98,496

Diluted Shares (thousands)           106,623      19,126                   111,713     103,987     19,092                   109,077


See accompanying notes to Unaudited Pro Forma Finanacial Statements.



                      NOTES TO UNAUDITED PRO FORMA FINANCIAL STATEMENTS

          1.   Method of Accounting for the Merger

               Kerr-McGee  accounted for the merger using the purchase method of
          accounting  for  business  combinations.  Accordingly,  HS  Resources'
          assets  acquired and  liabilities  assumed by Kerr-McGee were revalued
          and recorded at their estimated fair values. In the merger, Kerr-McGee
          assumed the outstanding  debt of HS Resources and converted each share
          of HS Resources common stock outstanding to Kerr-McGee common stock or
          cash, as provided in the merger agreement. The conversion consisted of
          an election to receive cash at $66 per share or an election to receive
          Kerr-McGee  common stock at a fixed exchange ratio of .9404 of a share
          of  Kerr-McGee  common  stock for each  share of HS  Resources  common
          stock. The cash consideration is limited to a maximum of $833 million,
          and this resulted in Kerr-McGee issuing 5,090,230 shares of its common
          stock to HS Resources stockholders.

          2.   Pro Forma Adjustments Related to the Merger

               The  unaudited  pro forma  balance  sheet  includes the following
          adjustments:

               (a)  This  entry  adjusts  the  historical   book  values  of  HS
          Resources' assets and liabilities to their estimated fair values as of
          June 30,  2001.  The  calculation  of the  total  purchase  price  and
          preliminary allocation to assets and liabilities are shown below:

                                                         (Dollars in millions
                                                          except share price)

     Calculation and preliminary allocation of
       purchase price:
         Number of shares of common stock to
         be issued                                            5,090,230

         Average of Kerr-McGee common stock
         price two days before and after
         merger announcement                                     $70.33
                                                                 ------

     Fair value of common stock to be issued                        358
         Add: Portion of the purchase price paid
         in cash.  This amount is added to long-
         term debt in the pro forma balance sheet                   833

         Add: Fair value of HS Resources options,
         unvested performance shares and restricted
         stock to be settled in cash, net of exercise
         proceeds of approximately $25 million.
         This amount is added to long-term debt
         in the pro forma balance sheet                              86
                                                                 ------
                                                                  1,277
         Add: Estimated merger costs, which
         includes $15 million of legal, accounting,
         and registration costs and $28 million of
         severance costs.  This amount is added to
         long-term debt in the pro forma balance
         sheet                                                       43
                                                                 ------
                  Total purchase price                           $1,320
                                                                 ======

         Allocation of purchase price:
              Current assets                                     $  126
              Properties, plant and equipment                     2,133
              Other assets                                           17
              Goodwill                                              302
              Current liabilities                                  (202)
              Long-term debt                                       (475)
              Deferred credits                                     (581)
                                                                 ------
                                                                 $1,320
                                                                 ======


               The purchase price allocation is subject to change in:

            *  The  fair  value of HS Resources working capital and other assets
               and liabilities on the effective date, and

            *  The actual merger costs incurred.

               These tems will not be known until after  the  effective  date of
          the merger.  Management does not  believe  the  final  purchase  price
          allocation will differ  materially  from the estimated  purchase price
          allocation.

               (b) These  adjustments  eliminate HS Resources'  historical  book
          values.

               The  unaudited  pro  forma   statement  of  income  includes  the
          following adjustments:

               (c) These  adjustments  increase the  depreciation  and depletion
          expense using the successful efforts method of accounting and is based
          on the preliminary allocation of the purchase price.

               (d) These  adjustments  increase interest expense due to the $958
          million of additional long-term debt, which results from financing the
          cash consideration ($833 million),  the fair value of the HS Resources
          options and unvested  performance  shares to be settled in cash net of
          the exercise prices of the HS Resources options ($82 million), and the
          estimated  merger costs ($43 million).  These are assumed to be funded
          with borrowings from existing credit facilities.

               (e) These adjustments  record the net tax effect of all pro forma
          adjustments at an effective income tax rate of 36.5%.

               (f) Amounts represent reclassification of $3 million for interest
          income  to  "Other  Income"  to  be  consistent  with  the  Kerr-McGee
          classification   and  $133   million  for  the  cost  of  trading  and
          transportation  to  offset  trading  and  transportation  income to be
          consistent with the second quarter 2001 historical reclassification by
          HS Resources.



                                   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: August 29, 2001