USX CORP
10-Q, 1999-11-10
PETROLEUM REFINING
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<PAGE> 1

                                    FORM 10-Q

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

(Mark One)

      [X]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934

                For the Quarterly Period Ended September 30, 1999

                                       or

      [ ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934

           For the transition period from ------------ to ------------


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


           Delaware                  1-5153                 25-0996816
       ---------------            ------------         -------------------
       (State or other            (Commission             (IRS Employer
       jurisdiction of            File Number)         Identification No.)
        incorporation)

600 Grant Street, Pittsburgh, PA                            15219-4776
- ---------------------------------------                     ----------
(Address of principal executive offices)                    (Zip Code)

                                 (412) 433-1121
                         ------------------------------
                         (Registrant's telephone number,
                              including area code)


- --------------------------------------------------------------------------------
Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.  Yes..X..No.....

Common stock outstanding at October 31, 1999 follows:

               USX-Marathon Group       - 310,719,384 shares
               USX-U. S. Steel Group    -  88,393,856 shares

<PAGE> 2

                                 USX CORPORATION
                                  SEC FORM 10-Q
                        QUARTER ENDED September 30, 1999
                           ---------------------------

                                     INDEX                        Page
                                     -----                        ----
PART I - FINANCIAL INFORMATION

   A.  Consolidated Corporation

       Item 1. Financial Statements:

               Consolidated Statement of Operations                  4

               Consolidated Balance Sheet                            6

               Consolidated Statement of Cash Flows                  8

               Selected Notes to Consolidated
                 Financial Statements                                9

               Ratio of Earnings to Combined Fixed Charges
                 and Preferred Stock Dividends and Ratio of
                 Earnings to Fixed Charges                          21

       Item 2. Management's Discussion and Analysis of
                 Financial Condition and Results of
                 Operations                                         23

       Item 3. Quantitative and Qualitative Disclosures about
                 Market Risk                                        31

               Financial Statistics                                 33

   B.  Marathon Group

       Item 1. Financial Statements:

               Marathon Group Statement of Operations               34

               Marathon Group Balance Sheet                         35

               Marathon Group Statement of Cash Flows               36

               Selected Notes to Financial Statements               37

       Item 2. Marathon Group Management's Discussion and
                 Analysis of Financial Condition and
                 Results of Operations                              46

       Item 3. Quantitative and Qualitative Disclosures about
                 Market Risk                                        63

               Supplemental Statistics                              65
<PAGE> 3

                                 USX CORPORATION
                                  SEC FORM 10-Q
                        QUARTER ENDED September 30, 1999
                           ---------------------------

                                     INDEX                        Page
                                     -----                        ----
PART I - FINANCIAL INFORMATION (Continued)

   C.  U. S. Steel Group

       Item 1. Financial Statements:

               U. S. Steel Group Statement of Operations           66

               U. S. Steel Group Balance Sheet                     67

               U. S. Steel Group Statement of Cash Flows           68

               Selected Notes to Financial Statements              69

       Item 2. U. S. Steel Group Management's Discussion
                 and Analysis of Financial Condition
                 and Results of Operations                         76

       Item 3. Quantitative and Qualitative Disclosures about
                 Market Risk                                       86

               Supplemental Statistics                             88

PART II - OTHER INFORMATION


Item 1.        Legal Proceedings                                   89

Item 2.        Changes in Securities and Use of Proceeds           90

Item 5.        Other Information                                   91

Item 6.        Exhibits and Reports on Form 8-K                    92


<PAGE> 4

Part I - Financial Information

   A.  Consolidated Corporation
<TABLE>
<CAPTION>
                    USX CORPORATION AND SUBSIDIARY COMPANIES
                CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited)
                ------------------------------------------------

                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions)                            1999    1998    1999     1998
- --------------------------------------------------------------------------------
REVENUES:
 <S>                                            <C>     <C>    <C>      <C>
 Sales                                          $7,827  $7,062 $20,636  $21,144
 Dividend and affiliate income (loss)              (42)     12     (31)      83
 Gain (loss) on disposal of assets                   5      14      (8)      58
 Gain (loss) on ownership change in Marathon
  Ashland Petroleum LLC                             11      (1)     11      245
 Other income                                        9       4      22       21
                                                ------  ------  ------   ------
   Total revenues                                7,810   7,091  20,630   21,551
                                                ------  ------  ------   ------
COSTS AND EXPENSES:
 Cost of sales (excludes items shown below)      5,896   5,195  15,260   15,461
 Selling, general and administrative expenses       60      81     149      233
 Depreciation, depletion and amortization          297     293     906      921
 Taxes other than income taxes                   1,121   1,106   3,269    3,157
 Exploration expenses                               40      46     162      203
 Inventory market valuation charges (credits)     (136)     50    (551)      22
                                                ------  ------  ------   ------
   Total costs and expenses                      7,278   6,771  19,195   19,997
                                                ------  ------  ------   ------
INCOME FROM OPERATIONS                             532     320   1,435    1,554
Net interest and other financial costs              92      73     266      226
Minority interest in income of Marathon Ashland
 Petroleum LLC                                     148      70     405      282
                                                ------  ------  ------   ------
INCOME BEFORE INCOME TAXES AND EXTRAORDINARY LOSS  292     177     764    1,046
Provision for estimated income taxes                93      61     266      362
                                                ------  ------  ------   ------
INCOME BEFORE EXTRAORDINARY LOSS                   199     116     498      684
Extraordinary loss on extinguishment of debt,
 net of income tax                                   -       -       5        -
                                                ------  ------  ------   ------
NET INCOME                                         199     116     493      684
Dividends on preferred stock                         2       2       7        7
                                                ------  ------  ------   ------
NET INCOME APPLICABLE TO COMMON STOCKS            $197    $114    $486     $677
                                                ======  ======  ======   ======






<FN>
Selected notes to financial statements appear on pages 9-20.
</TABLE>
<PAGE> 5
<TABLE>
<CAPTION>
                    USX CORPORATION AND SUBSIDIARY COMPANIES
          CONSOLIDATED STATEMENT OF OPERATIONS (Continued) (Unaudited)
                             INCOME PER COMMON SHARE
          ------------------------------------------------------------


                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions, except per share amounts)  1999    1998    1999     1998
- --------------------------------------------------------------------------------
<S>                                            <C>     <C>     <C>      <C>
APPLICABLE TO MARATHON STOCK:

 Net income                                       $230     $51    $483     $396
   - Per share - basic                             .74     .18    1.56     1.37
               - diluted                           .74     .17    1.56     1.36

 Dividends paid per share                          .21     .21     .63      .63

 Weighted average shares, in thousands
   - Basic                                     309,392 291,320 309,160  289,928
   - Diluted                                   309,810 291,803 309,491  290,528

APPLICABLE TO STEEL STOCK:

 Income (loss) before extraordinary loss          $(33)    $63      $8     $281
   - Per share - basic                            (.37)    .72     .10     3.22
            - diluted                             (.37)    .71     .10     3.11

 Extraordinary loss, net of income tax               -       -       5        -
   - Per share - basic and diluted                   -       -     .06        -

 Net income (loss)                                $(33)    $63      $3     $281
   - Per share - basic                            (.37)    .72     .04     3.22
            - diluted                             (.37)    .71     .04     3.11

 Dividends paid per share                          .25     .25     .75      .75

 Weighted average shares, in thousands
   - Basic                                      88,394  88,099  88,383   87,223
   - Diluted                                    88,394  92,359  88,385   94,717
















<FN>
Selected notes to financial statements appear on pages 9-20.
</TABLE>
<PAGE> 6
<TABLE>
<CAPTION>
                    USX CORPORATION AND SUBSIDIARY COMPANIES
                     CONSOLIDATED BALANCE SHEET (Unaudited)
                    ----------------------------------------

                                     ASSETS
                                                   September 30 December 31
(Dollars in millions)                                  1999         1998
- --------------------------------------------------------------------------------
<S>                                                  <C>           <C>
ASSETS

Current assets:
  Cash and cash equivalents                              $93          $146
  Receivables, less allowance for doubtful
   accounts of $9 and $12                              2,152         1,663
  Inventories                                          2,638         2,008
  Deferred income tax benefits                           222           217
  Other current assets                                   231           172
                                                      ------        ------
     Total current assets                              5,336         4,206

Investments and long-term receivables,
 less reserves of $3 and $10                           1,251         1,249
Property, plant and equipment, less accumulated
 depreciation, depletion and amortization of
 $16,729 and $16,238                                  12,687        12,929
Prepaid pensions                                       2,578         2,413
Other noncurrent assets                                  298           336
                                                      ------        ------
     Total assets                                    $22,150       $21,133
                                                      ======        ======


























<FN>
Selected notes to financial statements appear on pages 9-20.
</TABLE>
<PAGE> 7
<TABLE>
<CAPTION>
                    USX CORPORATION AND SUBSIDIARY COMPANIES
               CONSOLIDATED BALANCE SHEET (Continued) (Unaudited)
               --------------------------------------------------

                      LIABILITIES AND STOCKHOLDERS' EQUITY
                                                   September 30 December 31
(Dollars in millions)                                  1999         1998
- --------------------------------------------------------------------------------
<S>                                                  <C>           <C>
LIABILITIES

Current liabilities:
  Notes payable                                          $76          $145
  Accounts payable                                     2,947         2,478
  Distribution payable to minority shareholder of
   Marathon Ashland Petroleum LLC                          -           103
  Payroll and benefits payable                           434           480
  Accrued taxes                                          334           245
  Accrued interest                                        59            97
  Long-term debt due within one year                      57            71
                                                      ------        ------
     Total current liabilities                         3,907         3,619

Long-term debt, less unamortized discount              4,040         3,920
Long-term deferred income taxes                        1,732         1,579
Employee benefits                                      2,869         2,868
Deferred credits and other liabilities                   718           720
Preferred stock of subsidiary                            250           250
USX obligated mandatorily redeemable convertible preferred
 securities of a subsidiary trust holding solely junior
 subordinated convertible debentures of USX              182           182

Minority interest in Marathon Ashland Petroleum LLC    1,773         1,590

STOCKHOLDERS' EQUITY

Preferred stock -
  6.50% Cumulative Convertible issued - 2,755,887 shares and
   2,767,787 shares ($138 liquidation preference)          3             3
Common stocks:
  Marathon Stock issued - 310,078,463 shares and
   308,458,835 shares                                    310           308
  Steel Stock issued - 88,369,115 shares and
   88,336,439 shares                                      88            88
  Securities exchangeable solely into Marathon Stock
   issued - 293,811 shares and 507,324 shares              -             1
Additional paid-in capital                             4,631         4,587
Deferred compensation                                      -            (1)
Retained earnings                                      1,692         1,467
Accumulated other comprehensive income (loss)            (45)          (48)
                                                      ------        ------
     Total stockholders' equity                        6,679         6,405
                                                      ------        ------
     Total liabilities and stockholders' equity      $22,150       $21,133
                                                      ======        ======


<FN>
Selected notes to financial statements appear on pages 9-20.
</TABLE>
<PAGE> 8
<TABLE>
<CAPTION>
                    USX CORPORATION AND SUBSIDIARY COMPANIES
                CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited)
                ------------------------------------------------

                                                       Nine Months Ended
                                                          September 30
(Dollars in millions)                                  1999         1998
- --------------------------------------------------------------------------------
<S>                                                     <C>           <C>
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS

OPERATING ACTIVITIES:
Net income                                              $493          $684
Adjustments to reconcile to net cash provided
 from operating activities:
  Extraordinary loss                                       5             -
  Minority interest in income of Marathon Ashland
   Petroleum LLC                                         405           282
  Depreciation, depletion and amortization               906           921
  Exploratory dry well costs                              74           111
  Inventory market valuation charges (credits)          (551)           22
  Pensions and other postretirement benefits            (156)         (168)
  Deferred income taxes                                  161           249
Gain on ownership change in Marathon
   Ashland Petroleum LLC                                 (11)         (245)
  (Gain) loss on disposal of assets                        8           (58)
  Changes in:
     Current receivables  - sold                          30             -
                          - operating turnover          (816)          133
Inventories                                             (116)         (148)
     Current accounts payable and accrued expenses       803           (88)
  All other - net                                         67           (67)
                                                      ------        ------
     Net cash provided from operating activities       1,302         1,628
                                                      ------        ------
INVESTING ACTIVITIES:
Capital expenditures                                  (1,048)       (1,063)
Acquisition of Tarragon Oil and Gas Limited                -          (686)
Disposal of assets                                       261            61
Restricted cash -withdrawals                              54           203
             - deposits                                  (39)          (44)
Affiliates - investments - net                           (16)          (96)
         - loans and advances                           (104)          (85)
         - repayments of loans and advances                -            63
All other - net                                           (4)            -
                                                      ------        ------
     Net cash used in investing activities              (896)       (1,647)
                                                      ------        ------
FINANCING ACTIVITIES:
Commercial paper and revolving credit
    arrangements - net                                 (126)         1,439
Other debt - borrowings                                  460           827
           - repayments                                 (240)       (1,230)
Common stock -issued                                      46           139
           - repurchased                                   -          (195)
Preferred stock repurchased                                -            (8)
Dividends paid                                          (266)         (256)
Distributions to minority shareholder of Marathon
 Ashland Petroleum LLC                                  (333)         (211)
                                                      ------        ------
 Net cash provided from (used in) financing activities  (459)          505
                                                      ------        ------
EFFECT OF EXCHANGE RATE CHANGES ON CASH                    -             1
                                                      ------        ------
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS     (53)          487
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR           146            54
                                                      ------        ------
CASH AND CASH EQUIVALENTS AT END OF PERIOD               $93          $541
                                                      ======        ======
Cash used in operating activities included:
  Interest and other financial costs paid (net of
   amount capitalized)                                 $(313)        $(288)
  Income taxes paid                                      (36)         (181)

<FN>
Selected notes to financial statements appear on pages 9-20.
</TABLE>
<PAGE> 9

                    USX CORPORATION AND SUBSIDIARY COMPANIES
               SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
              ----------------------------------------------------
                                   (Unaudited)


     1.   The information furnished in these financial statements is unaudited
     but, in the opinion of management, reflects all adjustments necessary for a
     fair presentation of the results for the periods covered.  All such
     adjustments are of a normal recurring nature unless disclosed otherwise.
     These financial statements, including selected notes, have been prepared in
     accordance with the applicable rules of the Securities and Exchange
     Commission and do not include all of the information and disclosures
     required by generally accepted accounting principles for complete financial
     statements.  Certain reclassifications of prior year data have been made to
     conform to 1999 classifications.  Additional information is contained in
     the USX Annual Report on Form 10-K for the year ended December 31, 1998.

     2.   On August 13, 1999, USX and Kobe Steel, Ltd. (Kobe Steel) completed a
     transaction that combined the steelmaking and bar producing assets of
     USS/Kobe Steel Company (USS/Kobe) with companies controlled by Blackstone
     Capital Partners II-those companies being Republic Technologies
     International, Inc., Republic Engineered Steels, Inc. and Bar Technologies,
     Inc. (collectively Republic).  In addition, USX made a $15 million equity
     investment in Republic.  USX owned 50% of USS/Kobe and now owns
     approximately 16% of Republic.  USX will account for its investment in
     Republic under the equity method of accounting.  The seamless pipe business
     of USS/Kobe was excluded from this transaction.  That business, now known
     as Lorain Tubular Company LLC, will continue to operate as a joint venture
     between USX and Kobe Steel.  Third quarter 1999 dividend and affiliate
     income (loss) includes $53 million in charges related to the impairment of
     the carrying value of USX's investment in USS/Kobe and costs related to the
     formation of Republic.

          In the second quarter of 1999, Marathon Ashland Petroleum LLC (MAP)
     sold Scurlock Permian LLC (Scurlock), its crude oil gathering business, to
     Plains Marketing, L.P for $137 million.  During the nine months of 1999,
     MAP recorded a pretax loss of $16 million related to the sale.  Scurlock
     had been reported as part of the Marathon Group's refining, marketing and
     transportation operating segment.

    On June 1, 1999, the Marathon Group announced that it had signed a
    definitive agreement to sell Carnegie Natural Gas Company and affiliated
    subsidiaries (Carnegie) to Equitable Resources, Inc.  The transaction is
    expected to close later this year.  Carnegie is engaged in natural gas
    production, transmission, distribution, sales and storage activities in
    Pennsylvania and West Virginia.  At September 30, 1999, the net assets held
    for sale have been included in other current assets in the consolidated
    balance sheet.  During the second and third quarters of 1999, USX recorded
    an estimated pretax loss of $8 million related to the sale.  Carnegie has
    been reported as part of the Marathon Group's other energy related
    businesses operating segment.


<PAGE> 10

                    USX CORPORATION AND SUBSIDIARY COMPANIES
         SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
         ---------------------------------------------------------------
                                   (Unaudited)


     3.   On March 31, 1999, USX irrevocably deposited with a trustee the entire
     5.5 million common shares it owned in RTI International Metals, Inc. (RTI).
     The deposit of the shares resulted in the satisfaction of USX's obligation
     under its 6-3/4% Exchangeable Notes (indexed debt) due February 1, 2000.
     Under the terms of the indenture, the trustee will exchange the RTI shares
     for the notes at maturity.  The notes are exchangeable for shares of RTI
     common stock on a variable basis up to one share per note depending on the
     market price of RTI common stock at maturity.  Ownership of any shares not
     required for satisfaction of the indexed debt will revert to USX.

          As a result of the above transaction, USX recorded in the first
     quarter of 1999 an extraordinary loss of $5 million, net of a $3 million
     income tax benefit, representing prepaid interest expense and the write-off
     of unamortized debt issue costs, and a pretax charge of $22 million,
     representing the difference between the carrying value of the investment in
     RTI and the carrying value of the indexed debt, which is included in gain
     (loss) on disposal of assets.  This transaction represents a noncash
     investing and financing activity of $56 million, which was the carrying
     value of the indexed debt at March 31, 1999.

          Additionally, a $13 million credit to adjust the indexed debt to
     settlement value at March 31, 1999, is included in net interest and other
     financial costs.

          In December 1996, USX had issued $117 million of notes indexed to the
     common share price of RTI.  At maturity, USX would have been required to
     exchange the notes for shares of RTI common stock, or redeem the notes for
     the equivalent amount of cash.  Since USX's investment in RTI was
     attributed to the U. S. Steel Group, the indexed debt was also attributed
     to the U. S. Steel Group.  USX had a 26% investment in RTI and accounted
     for its investment using the equity method of accounting.

     4.   Total comprehensive income for the third quarter of 1999 and 1998 was
     $208 million and $113 million, respectively, and $496 million and
     $678 million for the nine months of 1999 and 1998, respectively.

     5.   The Marathon Group's operations consists of three reportable operating
     segments: 1) Exploration and Production (E&P) - explores for and produces
     crude oil and natural gas on a worldwide basis; 2) Refining, Marketing and
     Transportation (RM&T) - refines, markets and transports crude oil and
     petroleum products, primarily in the Midwest and southeastern United States
     through MAP; and 3) Other Energy Related Businesses (OERB).
<PAGE> 11

                    USX CORPORATION AND SUBSIDIARY COMPANIES
         SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
         ---------------------------------------------------------------
                                   (Unaudited)


     5. (Continued)
         OERB is an aggregation of two segments which fall below the
     quantitative reporting thresholds: 1) Natural Gas and Crude Oil Marketing
     and Transportation - markets and transports its own and third-party natural
     gas and crude oil in the United States; and 2) Power Generation - develops,
     constructs and operates independent electric power projects worldwide.  The
     U. S. Steel Group consists of one operating segment, U. S. Steel (USS).
     USS is engaged in the production and sale of steel mill products, coke and
     taconite pellets.  USS also engages in the following related business
     activities:  the management of mineral resources, domestic coal mining,
     engineering and consulting services, and real estate development and
     management.  The results of segment operations are as follows:
<TABLE>
<CAPTION>
                                                 Total
                                                Marathon
(In millions)                E&P    RM&T   OERB Segments  USS  Total
- --------------------------------------------------------------------------------
<S>                        <C>   <C>       <C>  <C>          <C>
THIRD QUARTER 1999
Revenues:
 Customer                  $820  $5,413    $219 $6,452$1,376 $7,828
 Intersegment (a)            61      16       9     86     -     86
 Intergroup (a)               5       -       7     12     2     14
 Equity in earnings (losses) of
   unconsolidated affiliates (2)      6       5      9    (3)     6
 Other                        1      12       3     16    12     28
                           -----   -----   -----  ----- -----  -----
 Total revenues            $885  $5,447    $243 $6,575$1,387  $7,962
                           =====   =====   =====  ===== =====  =====
Segment income (loss)       $201    $236     $13   $450  $(51)  $399
                           =====   =====   =====  ===== =====  =====

THIRD QUARTER 1998
Revenues:
 Customer                  $534  $4,976     $72 $5,582$1,480 $7,062
 Intersegment (a)            29       7       1     37     -     37
 Intergroup (a)               1       -       1      2     1      3
 Equity in earnings of
   unconsolidated affiliates  -       4       2     6      3      9
 Other                        2       5       3     10    13     23
                           -----   -----   -----  ----- ----- -----
 Total revenues            $566  $4,992     $79 $5,637$1,497 $7,134
                           =====   =====   =====  =====  ==== =====
Segment income               $60    $224      $6   $290   $41   $331
                           =====   =====   =====  ===== ===== =====

<FN>
(a)Intersegment and intergroup sales and transfers were conducted on an arm's-
   length basis.
</TABLE>
<PAGE> 12

                    USX CORPORATION AND SUBSIDIARY COMPANIES
         SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
         ---------------------------------------------------------------
                                   (Unaudited)


     5.   (Continued)
<TABLE>
<CAPTION>
                                                 Total
                                                Marathon
(In millions)                E&P    RM&T   OERB Segments  USS  Total
- --------------------------------------------------------------------------------
<S>                      <C>    <C>        <C>
NINE MONTHS ENDED SEPTEMBER 30, 1999
Revenues:
 Customer                $2,081 $14,229    $414$16,724$3,913$20,637
 Intersegment (a)           129      25      24    178     -    178
 Intergroup (a)              12       -      15     27    14     41
 Equity in earnings (losses) of
   unconsolidated affiliates  2      13      18     33   (36)    (3)
 Other                       20      28      12     60    33     93
                           -----   -----   -----  ----- -----  -----
 Total revenues          $2,244 $14,295    $483 $17,022 $3,924 $20,946
                           =====   =====   =====  ===== =====  =====
Segment income (loss)       $361    $509     $47   $917 $(119)  $798
                           =====   =====   =====  ===== =====  =====

NINE MONTHS ENDED SEPTEMBER 30, 1998
Revenues:
 Customer                $1,551 $14,496    $234$16,281$4,838$21,119
 Intersegment (a)           113       9       5    127     -    127
 Intergroup (a)               7       -       5     12     1     13
 Equity in earnings of
   unconsolidated affiliates  1      10       8     19    46     65
 Other                       23      29       8     60    41    101
                           -----   -----   -----  ----- -----  -----
 Total revenues          $1,695 $14,544    $260$16,499$4,926$21,425
                           =====   =====   =====  =====  ====  =====
Segment income              $257    $749     $23 $1,029  $301 $1,330
                           =====   =====   =====  ===== =====  =====
<FN>
(a)Intersegment and intergroup sales and transfers were conducted on an arm's-
   length basis.
</TABLE>
<PAGE> 13

                    USX CORPORATION AND SUBSIDIARY COMPANIES
         SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
         ---------------------------------------------------------------
                                   (Unaudited)



     5.   (Continued)



    The following schedules reconcile segment revenues and income (loss) to
    amounts reported in the Marathon and U. S. Steel Groups' financial
    statements:
<TABLE>
<CAPTION>
                                                Marathon Group U.S. Steel Group
                                                Third Quarter   Third Quarter
                                                    Ended           Ended
                                                 September 30    September 30
(In millions)                                    1999    1998    1999     1998
- --------------------------------------------------------------------------------
<S>                                             <C>     <C>     <C>      <C>
Revenues:
 Revenues of reportable segments                $6,575  $5,637  $1,387   $1,497
 Items not allocated to segments:
  Gain (loss) on ownership change in MAP            11      (1)      -        -
  Other                                            (10)      -     (53)       -
 Elimination of intersegment revenues              (86)    (37)      -        -
 Administrative revenues                             -      (2)      -        -
                                                ------  ------   -----    -----
   Total Group revenues                         $6,490  $5,597  $1,334   $1,497
                                                ======  ======  ======   ======

Income:
 Income (loss) for reportable segments            $450    $290    $(51)     $41
 Items not allocated to segments:
  Gain (loss) on ownership change in MAP            11      (1)      -        -
  Administrative expenses                          (26)    (25)     (4)      (6)
  Pension credits                                    -       -     100       94
  Costs related to former business activities        -       -     (21)     (24)
  Inventory market valuation adjustments           136     (50)      -        -
  Other (a)                                        (10)      1     (53)       -
                                                ------  ------  ------   ------
   Total Group income (loss) from operations      $561    $215    $(29)    $105
                                                ======  ======  ======   ======
<FN>
(a)Represents in 1999 for the Marathon Group, mainly the loss on sale of
   certain domestic production properties and for the U. S. Steel Group,
   impairment of investment in USS/Kobe and costs related to the formation of
   Republic.
</TABLE>
<PAGE> 14
<TABLE>
<CAPTION>
                    USX CORPORATION AND SUBSIDIARY COMPANIES
         SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
         ---------------------------------------------------------------
                                   (Unaudited)


     5.   (Continued)
                                                Marathon GroupU. S. Steel Group
                                                 Nine Months     Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(In millions)                                    1999    1998    1999     1998
- --------------------------------------------------------------------------------
<S>                                            <C>     <C>      <C>      <C>
Revenues:
 Revenues of reportable segments               $17,022 $16,499  $3,924   $4,926
 Items not allocated to segments:
  Gain on ownership change in MAP                   11     245       -        -
  Other                                            (33)     24     (75)       -
 Elimination of intersegment revenues             (178)   (127)      -        -
 Administrative revenues                             -      (3)      -        -
                                                ------  ------   -----    -----
   Total Group revenues                        $16,822 $16,638  $3,849   $4,926
                                                ======  ======  ======   ======

Income:
 Income (loss) for reportable segments            $917  $1,029   $(119)    $301
 Items not allocated to segments:
  Gain on ownership change in MAP                   11     245       -        -
  Administrative expenses                          (83)    (84)    (17)     (20)
  Pension credits                                    -       -     348      280
  Costs related to former business activities        -       -     (65)     (77)
  Inventory market valuation adjustments           551     (22)      -        -
  Other (a)                                        (33)    (98)    (75)       -
                                                ------  ------  ------   ------
   Total Group income from operations           $1,363  $1,070     $72     $484
                                                ======  ======  ======   ======
<FN>
(a)       Represents for the Marathon Group in 1999, mainly the loss on sale of
     Scurlock, Carnegie and certain domestic production properties, and in 1998,
     international exploration and production property impairments, MAP
     transition charges and gas contract settlement.  For the U. S. Steel Group
     in 1999, represents impairment of investment in USS/Kobe, costs related to
     the formation of Republic and loss on investment in RTI stock used to
     satisfy indexed debt obligations.

</TABLE>

<PAGE> 15

                    USX CORPORATION AND SUBSIDIARY COMPANIES
         SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
         ---------------------------------------------------------------
                                   (Unaudited)

     6.   The items below are included in both revenues and costs and expenses,
     resulting in no effect on income.
<TABLE>
<CAPTION>
                                                  (In millions)
                                        -------------------------------
                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
                                                 1999    1998    1999     1998
                                                 ----    ----    ----     ----
    <S>                                         <C>     <C>     <C>      <C>
    Consumer excise taxes on petroleum
      products and merchandise                  $1,007  $1,000  $2,923   $2,834
    Matching crude oil and refined product
      buy/sell transactions settled in cash        901   1,012   2,471    2,994
</TABLE>
     7.   Income from operations includes net periodic pension credits of $37
     million and $53 million in the third quarter of 1999 and 1998,
     respectively, ($165 million and $151 million in the nine months of 1999 and
     1998, respectively.)  These pension credits are primarily noncash and for
     the most part are included in selling, general and administrative expenses.

          In the second quarter of 1999, USX recognized a one-time pretax
     settlement gain of $35 million, related mainly to pension costs of
     employees who retired under the U. S. Steel Group 1998 voluntary early
     retirement program.  This noncash settlement gain is included in selling,
     general and administrative expenses.

     8.   The provision for estimated income taxes for the periods reported is
     based on tax rates and amounts which recognize management's best estimate
     of current and deferred tax assets and liabilities.

     9.   The method of calculating net income (loss) per share for the Marathon
     Stock and Steel Stock reflects the USX Board of Directors' intent that the
     separately reported earnings and surplus of the Marathon Group and the
     U. S. Steel Group, as determined consistent with the USX Restated
     Certificate of Incorporation, are available for payment of dividends on the
     respective classes of stock, although legally available funds and
     liquidation preferences of these classes of stock do not necessarily
     correspond with these amounts.  The financial statements of the Marathon
     Group and the U. S. Steel Group, taken together, include all accounts which
     comprise the corresponding consolidated financial statements of USX.

          Basic net income (loss) per share is calculated by adjusting net
     income (loss) for dividend requirements of preferred stock and is based on
     the weighted average number of common shares outstanding.

          Diluted net income (loss) per share assumes conversion of convertible
     securities for the applicable periods outstanding and assumes exercise of
     stock options, provided in each case, the effect is not antidilutive.
<PAGE> 16
<TABLE>
<CAPTION>
                    USX CORPORATION AND SUBSIDIARY COMPANIES
         SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
         ---------------------------------------------------------------
                                   (Unaudited)


     9.   (Continued)

          COMPUTATION OF INCOME (LOSS) PER SHARE
                                              Third Quarter Ended
                                                  September 30
                                                     1999            1998
                                                Basic  Diluted  Basic   Diluted
- --------------------------------------------------------------------------------
<S>                                            <C>     <C>     <C>      <C>
Marathon Group

Net income (millions)                             $230    $230     $51      $51
                                                ======  ======  ======   ======
Shares of common stock outstanding (thousands):
 Average number of common shares outstanding   309,392 309,392 291,320  291,320
 Effect of dilutive stock options                    -     418       -      483
                                                ------  ------  ------   ------
   Average common shares and dilutive effect   309,392 309,810 291,320  291,803
                                                ======  ======  ======   ======
Net income per share                              $.74    $.74    $.18     $.17
                                                ======  ======  ======   ======
U. S. Steel Group

Net income (loss) (millions):
 Net income (loss)                                $(31)   $(31)    $65      $65
 Dividends on preferred stock                        2       2       2        2
                                                ------  ------  ------   ------
 Net income (loss) applicable to Steel Stock       (33)    (33)     63       63
 Effect of dilutive convertible securities           -       -       -        2
                                                ------  ------  ------   ------
   Net income (loss) assuming conversions         $(33)   $(33)    $63      $65
                                                ======  ======  ======   ======
Shares of common stock outstanding (thousands):
 Average number of common shares outstanding    88,394  88,394  88,099   88,099
 Effect of dilutive securities:
  Trust preferred securities                         -       -       -    4,256
  Stock options                                      -       -       -        4
                                                ------  ------  ------   ------
   Average common shares and dilutive effect    88,394  88,394  88,099   92,359
                                                ======  ======  ======   ======
 Net income (loss) per share                     $(.37)  $(.37)   $.72     $.71
                                                ======  ======  ======   ======
</TABLE>
<PAGE> 17
<TABLE>
<CAPTION>
                    USX CORPORATION AND SUBSIDIARY COMPANIES
         SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
         ---------------------------------------------------------------
                                   (Unaudited)

     9.   (Continued)

          COMPUTATION OF INCOME (LOSS) PER SHARE
                                               Nine Months Ended
                                                  September 30
                                                     1999            1998
                                                Basic  Diluted  Basic   Diluted
- --------------------------------------------------------------------------------
<S>                                            <C>     <C>     <C>      <C>
Marathon Group

Net income (millions)                             $483    $483    $396     $396
                                                ======  ======  ======   ======
Shares of common stock outstanding (thousands)
 Average number of common shares outstanding   309,160 309,160 289,928  289,928
 Effect of dilutive stock options                    -     331       -      600
                                                ------  ------  ------   ------
   Average common shares and dilutive effect   309,160 309,491 289,928  290,528
                                                ======  ======  ======   ======
Net income per share                             $1.56   $1.56   $1.37    $1.36
                                                ======  ======  ======   ======
U. S. Steel Group

Net income (millions):
 Income before extraordinary loss                  $15     $15    $288     $288
 Dividends on preferred stock                        7       7       7        -
 Extraordinary loss                                  5       5       -        -
                                                ------  ------  ------   ------
 Net income applicable to Steel Stock                3       3     281      288
 Effect of dilutive convertible securities           -       -       -        7
                                                ------  ------  ------   ------
   Net income assuming conversions                  $3      $3    $281     $295
                                                ======  ======  ======   ======
Shares of common stock outstanding (thousands):
 Average number of common shares outstanding    88,383  88,383  87,223   87,223
 Effect of dilutive securities:
  Trust preferred securities                         -       -       -    4,256
  Preferred stock                                    -       -       -    3,190
  Stock options                                      -       2       -       48
                                                ------  ------  ------   ------
   Average common shares and dilutive effect    88,383  88,385  87,223   94,717
                                                ======  ======  ======   ======
Per share:
 Income before extraordinary loss                 $.10    $.10   $3.22    $3.11
 Extraordinary loss                                .06     .06       -        -
                                                ------  ------  ------   ------
 Net income                                       $.04    $.04   $3.22    $3.11
                                                ======  ======  ======   ======
</TABLE>
<PAGE> 18

                    USX CORPORATION AND SUBSIDIARY COMPANIES
         SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
         ---------------------------------------------------------------
                                   (Unaudited)


     10.  During 1997, Marathon Oil Company (Marathon) and Ashland Inc.
     (Ashland) agreed to combine the major elements of their refining, marketing
     and transportation (RM&T) operations.  On January 1, 1998, Marathon
     transferred certain RM&T net assets to MAP, a new consolidated subsidiary.
     Also on January 1, 1998, Marathon acquired certain RM&T net assets from
     Ashland in exchange for a 38% interest in MAP.  The acquisition was
     accounted for under the purchase method of accounting.  The purchase price
     was determined to be $1.9 billion, based upon an external valuation.  The
     change in Marathon's ownership interest in MAP resulted in a gain of $245
     million, which is included in the first nine months 1998 revenues.  In
     accordance with MAP closing agreements, Marathon and Ashland made capital
     contributions to MAP for environmental improvements, approximating $2
     million and $19 million, respectively.  The closing agreements stipulate
     that ownership interests in MAP will not be adjusted as a result of such
     contributions.  Accordingly, Marathon recognized a gain on ownership change
     of $11 million in the third quarter of 1999.

          Effective August 11, 1998, Marathon acquired Tarragon Oil and Gas
     Limited (Tarragon), a Canadian oil and gas exploration and production
     company.  Results for 1999 include the operations of Marathon Canada
     Limited, formerly known as Tarragon.

     11.  Inventories are carried at lower of cost or market.  Cost of
     inventories is determined primarily under the last-in, first-out (LIFO)
     method.
<TABLE>
<CAPTION>
                                                         (In millions)
                                                    ------------------------
                                                   September 30 December 31
                                                       1999         1998
                                                   -----------  -----------

    <S>                                               <C>          <C>
    Raw materials                                       $808         $916
    Semi-finished products                               350          282
    Finished products                                  1,324        1,205
    Supplies and sundry items                            156          156
                                                      ------        ------
      Total (at cost)                                  2,638        2,559
    Less inventory market valuation reserve                -          551
                                                      ------        ------
      Net inventory carrying value                    $2,638       $2,008
                                                      ======        ======
</TABLE>
          The inventory market valuation reserve reflects the extent that the
     recorded LIFO cost basis of crude oil and refined products inventories
     exceeds net realizable value.  The reserve is decreased to reflect
     increases in market prices and inventory turnover and increased to reflect
     decreases in market prices.  Changes in the inventory market valuation
     reserve result in noncash charges or credits to costs and expenses.  For
     additional information, see discussion of results of operations in the
     Marathon Group's Management's Discussion and Analysis of Financial
     Condition and Results of Operations.


<PAGE> 19

                    USX CORPORATION AND SUBSIDIARY COMPANIES
         SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
         ---------------------------------------------------------------
                                   (Unaudited)


     12.  In 1997, USX sold its stock in Delhi Gas Pipeline Corporation and
     other subsidiaries of USX that comprised all of the Delhi Group.  The net
     proceeds of the sale of $195 million were used to redeem all shares of USX-
     Delhi Group Common Stock (Delhi Stock) and were distributed to the holders
     thereof on January 26, 1998.  After the redemption, 50,000,000 shares of
     Delhi Stock remain authorized but unissued.

     13.  At September 30, 1999, USX had $400 million in borrowings against its
     $2,350 million long-term revolving credit agreement.

          At September 30, 1999, MAP had no borrowings against its $500 million
     revolving credit agreements with banks or its $190 million revolving credit
     agreement with Ashland.

          USX has a short-term credit agreement totaling $125 million at
     September 30, 1999.  Interest is based on the bank's prime rate or London
     Interbank Offered Rate (LIBOR), and carries a facility fee of .15%.
     Certain other banks provide short-term lines of credit totaling $150
     million which require a .125% fee or maintenance of compensating balances
     of 3%.  At September 30, 1999, there were no borrowings against these
     facilities.  USX had other outstanding short-term borrowings of $76
     million.

          In the event of a change in control of USX, debt obligations totaling
     $3,535 million at September 30, 1999, may be declared immediately due and
     payable.

     14.  In the first quarter of 1999, USX issued $300 million in aggregate
     principal amount of 6.65% Notes due 2006.

          On March 31, 1999, USX extinguished $117 million of indexed debt,
     representing 6-3/4% Exchangeable Notes due February 1, 2000.  See Note 3
     for further discussion.

     15.  USX had an agreement (the program) to sell an undivided interest in
     certain accounts receivable of the U. S. Steel Group.  At September 30,
     1999, the amount sold under the program that had not been collected
     was $350 million.  The agreement expired on October 15, 1999.

<PAGE> 20

                    USX CORPORATION AND SUBSIDIARY COMPANIES
         SELECTED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
         ---------------------------------------------------------------
                                   (Unaudited)


     16.  USX is the subject of, or a party to, a number of pending or
     threatened legal actions, contingencies and commitments involving a variety
     of matters, including laws and regulations relating to the environment.
     Certain of these matters are discussed below.  The ultimate resolution of
     these contingencies could, individually or in the aggregate, be material to
     the consolidated financial statements.  However, management believes that
     USX will remain a viable and competitive enterprise even though it is
     possible that these contingencies could be resolved unfavorably.  See
     discussion of Liquidity in USX Consolidated Management's Discussion and
     Analysis of Financial Condition and Results of Operations.

          USX is subject to federal, state, local and foreign laws and
     regulations relating to the environment.  These laws generally provide for
     control of pollutants released into the environment and require responsible
     parties to undertake remediation of hazardous waste disposal sites.
     Penalties may be imposed for noncompliance.  At September 30, 1999, and
     December 31, 1998, accrued liabilities for remediation totaled $167 million
     and $145 million, respectively.  It is not presently possible to estimate
     the ultimate amount of all remediation costs that might be incurred or the
     penalties that may be imposed.  Receivables for recoverable costs from
     certain states, under programs to assist companies in cleanup efforts
     related to underground storage tanks at retail marketing outlets, were $53
     million at September 30, 1999, and $41 million at December 31, 1998.

          For a number of years, USX has made substantial capital expenditures
     to bring existing facilities into compliance with various laws relating to
     the environment.  In the nine months of 1999 and for the years 1998 and
     1997, such capital expenditures totaled $58 million, $173 million and $134
     million, respectively.  USX anticipates making additional such expenditures
     in the future; however, the exact amounts and timing of such expenditures
     are uncertain because of the continuing evolution of specific regulatory
     requirements.

          At September 30, 1999, and December 31, 1998, accrued liabilities for
     platform abandonment and dismantlement totaled $147 million and $141
     million, respectively.

          Guarantees by USX of the liabilities of affiliated entities totaled
     $220 million at September 30, 1999.  In the event that any defaults of
     guaranteed liabilities occur, USX has access to its interest in the assets
     of most of the affiliates to reduce losses resulting from these guarantees.
     As of September 30, 1999, the largest guarantee for a single affiliate was
     $131 million.

          At September 30, 1999, USX's pro rata share of obligations of LOOP LLC
     and various pipeline affiliates secured by throughput and deficiency
     agreements totaled $153 million.  Under the agreements, USX is required to
     advance funds if the affiliates are unable to service debt.  Any such
     advances are prepayments of future transportation charges.

          Contract commitments to acquire property, plant and equipment and
     long-term investments at September 30, 1999, totaled $878 million
     compared with $812 million at December 31, 1998.

<PAGE> 21
<TABLE>
<CAPTION>
                                 USX CORPORATION
                   RATIO OF EARNINGS TO COMBINED FIXED CHARGES
                          AND PREFERRED STOCK DIVIDENDS
                      TOTAL ENTERPRISE BASIS - (Unaudited)
                  --------------------------------------------


 Nine Months Ended       Six Months Ended     Three Months Ended
    September 30             June 30               March 31
    1999  1998*            1999*  1998*          1999*   1998*
 ------------------     -----------------     -----------------
    <C>   <C>               <C>    <C>            <C>     <C>
    4.51  4.60              4.13   5.58           3.76    5.16
    ====   ====             ====   ====           ====    ====










</TABLE>
<TABLE>
<CAPTION>
                                 USX CORPORATION
                       RATIO OF EARNINGS TO FIXED CHARGES
                      TOTAL ENTERPRISE BASIS - (Unaudited)
                      ------------------------------------


 Nine Months Ended       Six Months Ended     Three Months Ended
    September 30             June 30               March 31
    1999  1998*            1999*  1998*          1999*   1998*
 ------------------      ----------------    -------------------
    <C>    <C>              <C>    <C>            <C>     <C>
    4.65   4.74             4.27   5.78           3.89    5.35
    ====   ====             ====   ====           ====    ====


<FN>
*Restated in September 1999.
</TABLE>
<PAGE> 22
<TABLE>
<CAPTION>
                                 USX CORPORATION
                   RATIO OF EARNINGS TO COMBINED FIXED CHARGES
                          AND PREFERRED STOCK DIVIDENDS
                      TOTAL ENTERPRISE BASIS - (Unaudited)
                              CONTINUING OPERATIONS
                  --------------------------------------------




                             Year Ended December 31*
             -------------------------------------------------------

                1998      1997      1996      1995     1994
                ----      ----      ----      ----     ----
                <C>       <C>       <C>       <C>      <C>
                3.45      3.98      3.72      1.51     2.05
                ====      ====      ====      ====     ====


</TABLE>
<TABLE>
<CAPTION>
                                 USX CORPORATION
                       RATIO OF EARNINGS TO FIXED CHARGES
                      TOTAL ENTERPRISE BASIS - (Unaudited)
                              CONTINUING OPERATIONS
                      ------------------------------------



                             Year Ended December 31*
             -------------------------------------------------------

                1998      1997      1996      1995     1994
               -----     -----     -----     -----     -----
                <C>       <C>       <C>       <C>      <C>
                3.56      4.18      4.02      1.64     2.22
               =====     =====     =====     =====     =====










<FN>
*Restated in 1999.
</TABLE>
<PAGE> 23

                    USX CORPORATION AND SUBSIDIARY COMPANIES
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     USX Corporation ("USX") is a diversified company that is principally
engaged in the energy business through its Marathon Group and in the steel
business through its U. S. Steel Group. The following discussion should be read
in conjunction with the third quarter and first nine months of 1999 USX
Consolidated Financial Statements and selected notes. For income per common
share amounts applicable to USX's two classes of common stock, USX-Marathon
Group Common Stock ("Marathon Stock") and USX-U. S. Steel Group Common Stock
("Steel Stock"), see Consolidated Statement of Operations - Income per Common
Share. For individual Group results, see Management's Discussion and Analysis of
Financial Condition and Results of Operations for the Marathon Group and the U.
S. Steel Group. For operating statistics, see Supplemental Statistics following
Management's Discussion and Analysis of Financial Condition and Results of
Operations for each of the respective Groups.

     Certain sections of Management's Discussion and Analysis include forward-
looking statements concerning trends or events potentially affecting USX. These
statements typically contain words such as "anticipates", "believes",
"estimates", "expects" or similar words indicating that future outcomes are
uncertain. In accordance with "safe harbor" provisions of the Private Securities
Litigation Reform Act of 1995, these statements are accompanied by cautionary
language identifying important factors, though not necessarily all such factors,
that could cause future outcomes to differ materially from those set forth in
the forward-looking statements. For additional risk factors affecting the
businesses of USX, see Supplementary Data - Disclosures About Forward-Looking
Statements in the USX 1998 Form 10-K.
<PAGE> 24

                    USX CORPORATION AND SUBSIDIARY COMPANIES
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

Results of Operations
- ---------------------

     Revenues for the third quarter and the first nine months of 1999 and 1998
are set forth in the following table:
<TABLE>
<CAPTION>
                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions)                            1999   1998     1999     1998
                                                ------  ------  ------   ------
<S>                                             <C>     <C>    <C>      <C>
Revenues
 Marathon Group                                 $6,490  $5,597 $16,822  $16,638
 U. S. Steel Group                               1,334   1,497   3,849    4,926
 Eliminations                                      (14)     (3)    (41)    (13)
                                                ------  ------ -------  -------
   Total USX Corporation revenues               $7,810  $7,091 $20,630  $21,551
Less:
 Excise taxes (a)(b)                             1,007   1,000   2,923    2,834
 Matching buy/sell transactions (a)(c)             901   1,012   2,471    2,994
                                                ------  ------  ------   ------
   Revenues excluding above items               $5,902  $5,079 $15,236  $15,723
                                                ======  ======  ======   ======
- ------
<FN>
(a)  Included in both revenues and costs and expenses for the Marathon Group and
     USX consolidated.
(b)  Consumer excise taxes on petroleum products and merchandise.
(c)  Matching crude oil and refined products buy/sell transactions settled in
     cash.
</TABLE>
     Revenues (excluding excise taxes and matching buy/sell transactions)
increased $823 million in the third quarter of 1999 compared with the third
quarter of 1998, reflecting an increase of $997 million for the Marathon Group
offset by a decrease of $163 million for the U. S. Steel Group.  For the first
nine months of 1999, revenues (excluding excise taxes and matching buy/sell
transactions) decreased $487 million compared with the same period of 1998,
reflecting an increase of $618 million for the Marathon Group and a decrease of
$1,077 million for the U. S. Steel Group.

     For discussion of revenues by Group, see Management's Discussion and
Analysis of Financial Condition and Results of Operations for the Marathon Group
and the U. S. Steel Group.

<PAGE> 25

                    USX CORPORATION AND SUBSIDIARY COMPANIES
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     Income from operations for the third quarter and the first nine months of
1999 and 1998 is set forth in the following table:
<TABLE>
<CAPTION>
                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions)                            1999   1998     1999     1998
                                                ------  ------  ------   ------

<S>                                               <C>     <C>   <C>     <C>
Reportable segments
 Marathon Group
  Exploration & production                        $201     $60    $361     $257
 Refining, marketing & transportation              236     224     509      749
 Other energy related businesses                    13       6      47       23
                                                ------  ------ -------  -------
 Income for reportable segments - Marathon Group  $450    $290    $917   $1,029
 U. S. Steel Group
  Income for reportable segment                    (51)     41    (119)     301
                                                ------  ------ -------  -------
 Income for reportable segments - USX Corporation  399     331     798    1,330

Items not allocated to segments:
 Marathon Group                                    111     (75)    446       41
 U. S. Steel Group                                  22      64     191      183
                                                ------  ------ -------  -------
  Total income from operations - USX Corporation  $532    $320  $1,435   $1,554
</TABLE>

     Income for reportable segments increased $68 million in the third quarter
of 1999 compared with the third quarter of 1998, reflecting an increase of $160
million for the Marathon Group reportable segments and a decrease of $92 million
for the U. S. Steel Group reportable segment. Income for reportable segments in
the first nine months of 1999 decreased by $532 million compared with the first
nine months of 1998, reflecting decreases of $112 million for the Marathon Group
reportable segments and $420 million for the U. S. Steel Group reportable
segment.

     For discussion of income from operations, see Management's Discussion and
Analysis of Financial Condition and Results of Operations for the Marathon Group
and the U. S. Steel Group.

<PAGE> 26

                    USX CORPORATION AND SUBSIDIARY COMPANIES
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     Net interest and other financial costs were $92 million for the third
quarter of 1999, an increase of $19 million from the third quarter of 1998.  The
increase was primarily due to an $11 million favorable adjustment to indexed
debt in the third quarter of 1998.  Net interest and other financial costs were
$266 million for the first nine months of 1999, a $40 million increase from the
first nine months of 1998, due primarily to the Marathon Group's lower interest
income, lower capitalized interest on upstream projects and increased interest
costs resulting from higher average debt levels.

     Provisions for estimated income taxes of $93 million and $266 million for
the third quarter and the first nine months of 1999 were based on tax rates and
amounts that recognize management's best estimate of current and deferred tax
assets and liabilities.  The U. S. Steel Group's provision for estimated income
taxes for the first nine months of 1998 included a $9 million favorable foreign
tax adjustment as a result of a favorable resolution of foreign tax litigation.

     Extraordinary loss on extinguishment of debt of $5 million, net of a $3
million income tax benefit, in the first nine months of 1999 represents prepaid
interest expense and the write-off of unamortized debt issue costs resulting
from the satisfaction of USX's obligation of its indexed debt in the first
quarter of 1999. For further discussion, see Note 3 to the USX Consolidated
Financial Statements.

     Net income was $199 million for the third quarter of 1999, an increase of
$83 million from the third quarter of 1998 reflecting an increase of $179
million for the Marathon Group and a decrease of $96 million for the U. S. Steel
Group.  Net income decreased $191 million compared with the first nine months of
1998, reflecting an increase of $87 million for the Marathon Group and a
decrease of $278 million for the U. S. Steel Group.  For further discussion of
net income by Group, see Management's Discussion and Analysis of Financial
Condition and Results of Operations for the Marathon Group and the U. S. Steel
Group.

Dividends to Stockholders
- -------------------------
     On October 26, 1999, the USX Board of Directors (the "Board") declared
dividends of 21 cents per share on Marathon Stock and 25 cents per share on
Steel Stock, payable December 10, 1999, to stockholders of record at the close
of business on November 17, 1999. The Board also declared a dividend of $0.8125
per share on USX's 6.50% Cumulative Convertible Preferred Stock, payable
December 31, 1999, to stockholders of record at the close of business on
December 1, 1999.

     On October 26, 1999, Marathon Oil Canada Limited, an indirect subsidiary of
Marathon Oil Company, declared a dividend of CDN $0.3090 per share on its non-
voting Exchangeable Shares, payable December 10, 1999, to stockholders of record
at the close of business on November 17, 1999.
<PAGE> 27

                    USX CORPORATION AND SUBSIDIARY COMPANIES
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

Cash Flows
- ----------
     Cash and cash equivalents totaled $93 million at September 30, 1999,
compared with $541 million at September 30, 1998, a decrease of $448 million
reflecting decreases of $431 million for the Marathon Group and $17 million for
the U. S. Steel Group.  The decrease for the Marathon Group was primarily the
result of a temporary change in excise tax payment patterns in 1998 that
reversed later in the year.

     Net cash provided from operating activities totaled $1,302 million in the
first nine months of 1999, a $326 million decrease from the first nine months of
1998.  The decrease was mainly due to lower net income (excluding the IMV
reserve adjustment and other noncash items).

     Capital expenditures for property, plant and equipment in the first nine
months of 1999 were $1,048 million compared with $1,063 million for the first
nine months of 1998. For further details, see USX Corporation - Financial
Statistics, following Management's Discussion and Analysis of Financial
Condition and Results of Operations.

     Loan and advances to affiliates were $104 million in the first nine months
of 1999 compared with $85 million in the first nine months of 1998.  Cash
outflows in both periods mainly reflected funding by the Marathon Group to
equity affiliates for capital projects, primarily the Sakhalin II project in
Russia.

     Repayments of loans and advances from affiliates were $63 million in the
first nine months of 1998 as a result of repayments by Sakhalin Energy
Investment Company, Ltd. of advances made by the Marathon Group in conjunction
with the Sakhalin II project in Russia.

     Contract commitments to acquire property, plant and equipment and long-term
investments at September 30, 1999, totaled $878 million compared with $812
million at December 31, 1998.

     USX's total notes payable, long-term debt, preferred stock of subsidiary
and USX obligated preferred securities of a subsidiary trust totaled $4,605
million at September 30, 1999, up $37 million from December 31, 1998.

<PAGE> 28

                    USX CORPORATION AND SUBSIDIARY COMPANIES
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------
Liquidity
- ---------
     At September 30, 1999, USX had $400 million of borrowings against its
$2,350 million long-term revolving credit agreement and $76 million of
borrowings against other short-term lines.  There were no borrowings against the
MAP revolving credit agreements at September 30, 1999.

     On October 15, 1999, USX borrowed an additional $350 million against its
long-term revolving credit agreement related to the expiration of the
U. S. Steel Group accounts receivable sales program.  Subsequent to the
expiration of the program, on October 15, 1999, USX entered into an agreement
to repurchase all accounts remaining outstanding.  See Note 15 to the USX
Consolidated Financial Statements.

     USX filed with the Securities and Exchange Commission a shelf registration
statement that became effective October 20, 1999.  The shelf registration
statement allows USX to offer and issue unsecured debt securites, common and
preferred stock and warrants in an aggregate principal amount up to $1 billion
in one or more separate offerings on terms to be determined at the time of sale.
Including this shelf registration statement, USX had a total of $1.678 billion
available under existing shelf registration statements at November 1, 1999.

     USX management believes that its short-term and long-term liquidity is
adequate to satisfy its obligations as of September 30, 1999, and to complete
currently authorized capital spending programs. Future requirements for USX's
business needs, including the funding of capital expenditures, debt maturities
for the balance of 1999 and years 2000 and 2001, and any amounts that may
ultimately be paid in connection with contingencies (which are discussed in Note
16 to the USX Consolidated Financial Statements), are expected to be financed by
a combination of internally generated funds, proceeds from the sale of stock,
borrowings and other external financing sources.

     USX management's opinion concerning liquidity and USX's ability to avail
itself in the future of the financing options mentioned in the above forward-
looking statements are based on currently available information.  To the extent
that this information proves to be inaccurate, future availability of financing
may be adversely affected.  Factors that could affect the availability of
financing include; the performance of each Group (as measured by various factors
including cash provided from operating activities), the state of worldwide debt
and equity markets, investor perceptions and expectations of past and future
performance, the overall U.S. financial climate, and, in particular, with
respect to borrowings, by levels of USX's outstanding debt and credit ratings by
rating agencies.

Environmental Matters, Contingencies and Commitments
- ----------------------------------------------------
     USX has incurred and will continue to incur substantial capital, operating
and maintenance, and remediation expenditures as a result of environmental laws
and regulations. To the extent these expenditures, as with all costs, are not
ultimately reflected in the prices of USX's products and services, operating
results will be adversely affected. USX believes that domestic competitors of
the U. S. Steel Group and substantially all the competitors of the Marathon
Group are subject to similar environmental laws and regulations. However, the
specific impact on each competitor may vary depending on a number of factors,
including the age and location of its operating facilities, marketing areas,
production processes and the specific products and services it provides.

<PAGE> 29

                    USX CORPORATION AND SUBSIDIARY COMPANIES
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------
     USX has been notified that it is a potentially responsible party ("PRP") at
41 waste sites under the Comprehensive Environmental Response, Compensation and
Liability Act ("CERCLA") as of September 30, 1999. In addition, there are 20
sites where USX has received information requests or other indications that USX
may be a PRP under CERCLA but where sufficient information is not presently
available to confirm the existence of liability. There are also 143 additional
sites, excluding retail gasoline stations, where remediation is being sought
under other environmental statutes, both federal and state, or where private
parties are seeking remediation through discussions or litigation. Of these
sites, 17 were associated with properties conveyed to MAP by Ashland for which
Ashland has retained liability for all costs associated with remediation. At
many of these sites, USX is one of a number of parties involved and the total
cost of remediation, as well as USX's share thereof, is frequently dependent
upon the outcome of investigations and remedial studies. USX accrues for
environmental remediation activities when the responsibility to remediate is
probable and the amount of associated costs is reasonably determinable. As
environmental remediation matters proceed toward ultimate resolution or as
additional remediation obligations arise, charges in excess of those previously
accrued may be required.

     In October 1998, the National Enforcement Investigations Center and Region
V of the United States Environmental Protection Agency ("EPA")conducted a multi-
media inspection of MAP's Detroit refinery.  Subsequently, in November 1998,
Region V conducted a multi-media inspection of MAP's Robinson refinery.  These
inspections covered compliance with the Clean Air Act (New Source Performance
Standards, Prevention of Significant Deterioration, and the National Emission
Standards for Hazardous Air Pollutants for Benzene), the Clean Water Act (Permit
exceedances for the Waste Water Treatment Plant), reporting obligations under
the Emergency Planning and Community Right to Know Act and the handling of
process waste. Thus far, MAP has been served with two Notices of Violation
("NOV") and three Findings of Violation in connection with the multi-media
inspection at its Detroit refinery.  MAP can contest the factual and the legal
basis for the allegations prior to the EPA taking enforcement action.  At this
time, it is not known when complete findings on the results of these multi-media
inspections will be issued.


     USX is the subject of, or a party to, a number of pending or threatened
legal actions, contingencies and commitments involving a variety of matters,
including laws and regulations relating to the environment (see Note 16 to the
USX Consolidated Financial Statements for a discussion of certain of these
matters). The ultimate resolution of these contingencies could, individually or
in the aggregate, be material to the USX Consolidated Financial Statements.
However, management believes that USX will remain a viable and competitive
enterprise even though it is possible that these contingencies could be resolved
unfavorably. See discussion of Liquidity herein.

Outlook
- -------
     See Outlook in Management's Discussion and Analysis of Financial Condition
and Results of Operations for the Marathon Group and the U. S. Steel Group.

Year 2000 Readiness Disclosure
- ------------------------------
     See Year 2000 Readiness Disclosure in Management's Discussion and Analysis
of Financial Condition and Results of Operations for the Marathon Group and the
U. S. Steel Group.
<PAGE> 30

                    USX CORPORATION AND SUBSIDIARY COMPANIES
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------


Accounting Standard
- -------------------
     In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards ("SFAS") No. 133, "Accounting for Derivative
Instruments and Hedging Activities".  This new standard requires recognition of
all derivatives as either assets or liabilities at fair value.  This new
standard may result in additional volatility in both current period earnings and
other comprehensive income as a result of recording recognized and unrecognized
gains and losses resulting from changes in the fair value of derivative
instruments.  At adoption this new standard requires a comprehensive review of
all outstanding derivative instruments to determine whether or not their use
meets the hedge accounting criteria.  Upon adoption there may be derivative
instruments employed by USX that do not meet all of the designated hedge
criteria.  These instruments will be reflected in income on a mark-to-market
basis.  Based upon the strategies currently used by USX and the level of
activity related to forward exchange contracts and commodity-based derivative
instruments in recent periods, USX does not anticipate the effect of adoption to
have a material impact on either financial position or results of operations.
The effective date of SFAS No. 133 was amended by SFAS No. 137.  USX plans to
adopt the standard effective January 1, 2001, as required.

<PAGE> 31

                    USX CORPORATION AND SUBSIDIARY COMPANIES
                          QUANTITATIVE AND QUALITATIVE
                          DISCLOSURES ABOUT MARKET RISK
                    -----------------------------------------

Management Opinion Concerning Derivative Instruments
- ----------------------------------------------------
     USX utilizes derivative instruments principally in hedging activities,
whereby gains and losses are generally offset by price changes in the underlying
commodity. In 1999, the Marathon Group's risk management policy was expanded to
include the use of derivative instruments for certain non-hedging and trading
activities.  These instruments will be marked-to-market each period and the
related income or loss will be included in income from operations.  Management
believes that use of derivative instruments along with risk assessment
procedures and internal controls does not expose USX to material risk.  The use
of derivative instruments could materially affect USX's results of operations in
particular quarterly or annual periods.  However, management believes that use
of derivative instruments will not have a material adverse effect on financial
position or liquidity.


Commodity Price Risk and Related Risks
- --------------------------------------
     Sensitivity analysis of the incremental effects on pretax income of
hypothetical 10% and 25% changes in commodity prices for open derivative
commodity instruments as of September 30, 1999 are provided in the following
table:
<TABLE>
<CAPTION>
                                                      Incremental Decrease
                                                        in Pretax Income
                                                    Assuming a Hypothetical
                                                      Price Change of (a):
(Dollars in millions)                                  10%          25%
- --------------------------------------------------------------------------------
<S>                                                     <C>         <C>
Derivative Commodity Instruments
Marathon Group (b) (c)
    Crude oil (price increase) (d)                      $6.8        $22.4
    Natural gas (price decrease) (d)                     2.4         10.2
    Refined products (price decrease) (d)                 .9          3.0

U. S. Steel Group
    Natural gas (price decrease) (d)                    $2.8         $7.0
    Zinc (price decrease) (d)                            2.7          6.8
    Tin (price decrease) (d)                              .3           .7
    Nickel (price decrease) (d)                            0           .1
<FN>
      (a)  Gains and losses on derivative commodity instruments are generally
      offset by price changes in the underlying commodity.  Effects of these
      offsets are not reflected in the sensitivity analyses.  Amounts reflect
      the estimated incremental effect on pretax income of hypothetical 10% and
      25% changes in closing commodity prices for each open contract position
      at September 30, 1999. Marathon Group and U. S. Steel Group management
      evaluate their portfolios of derivative commodity instruments on an
      ongoing basis and add or revise strategies to reflect anticipated market
      conditions and changes in risk profiles.  Changes to the portfolios
      subsequent to September 30, 1999, would cause future pretax income
      effects to differ from those presented in the table.

<PAGE> 32

                    USX CORPORATION AND SUBSIDIARY COMPANIES
                          QUANTITATIVE AND QUALITATIVE
                          DISCLOSURES ABOUT MARKET RISK
                    -----------------------------------------
      (b)  The number of net open contracts varied throughout third quarter
      1999, from a low of 107 contracts at July 14, 1999, to a high of 16,688
      contracts at September 15, 1999, and averaged 8,756 for the quarter.  The
      derivative commodity instruments used and hedging positions taken also
      varied throughout third quarter 1999, and will continue to vary in the
      future.  Because of these variations in the composition of the portfolio
      over time, the number of open contracts, by itself, cannot be used to
      predict future income effects.
      (c)  The calculation of sensitivity amounts for basis swaps assumes that
      the physical and paper indices are perfectly correlated.  Gains and
      losses on options are based on changes in intrinsic value only.
      (d)  The direction of the price change used in calculating the
      sensitivity amount for each commodity reflects that which would result in
      the largest incremental decrease in pretax income when applied to the
      derivative commodity instruments used to hedge that commodity.
</TABLE>
Interest Rate Risk
- ------------------
     As of September 30, 1999, the discussion of USX's interest rate risk has
not changed materially from that presented in Quantitative and Qualitative
Disclosures About Market Risk included in USX's 1998 Form 10-K.

Foreign Currency Exchange Rate Risk
- -----------------------------------
     USX is subject to the risk of price fluctuations related to anticipated
revenues and operating costs, firm commitments for capital expenditures and
existing assets or liabilities denominated in currencies other than U.S.
dollars.  USX has not generally used derivative instruments to manage this risk.
However, USX has made limited use of forward currency contracts to manage
exposure to certain currency price fluctuations.  At September 30, 1999, USX had
open Canadian dollar forward purchase contracts with a total carrying value of
$18 million.  A 10% increase in the September 30, 1999, Canadian dollar to U.S.
dollar forward rate would result in a charge to income of $2 million.

Equity Price Risk
- -----------------
     USX was subject to equity price risk resulting from its issuance in
December 1996 of $117 million of 6 3/4% Exchangeable Notes due February 1, 2000
("indexed debt").  However, on March 31, 1999, USX irrevocably deposited with a
trustee the entire 5.5 million shares it owned in RTI. The deposit of shares
resulted in the satisfaction of USX's obligation under the indexed debt. Under
the terms of the indenture, the trustee will exchange the RTI shares for the
notes at maturity.  USX is no longer exposed to any negative risks associated
with changes in the value of RTI common stock. For further discussion, see Note
3 to the USX Consolidated Financial Statements.

Safe Harbor
- -----------
     USX's quantitative and qualitative disclosures about market risk include
forward-looking statements with respect to management's opinion about risks
associated with USX's use of derivative instruments. These statements are based
on certain assumptions with respect to market prices and industry supply and
demand for crude oil, natural gas, refined products, steel products and certain
raw materials. To the extent that these assumptions prove to be inaccurate,
future outcomes with respect to USX's hedging programs may differ materially
from those discussed in the forward-looking statements.
<PAGE> 33
<TABLE>
<CAPTION>
                                 USX CORPORATION
                        FINANCIAL STATISTICS (Unaudited)
                        --------------------------------


                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
                                                --------------  --------------
(Dollars in millions)                            1999    1998    1999     1998
- ------------------------------------------------------------------------------
<S>                                             <C>     <C>    <C>      <C>
REVENUES

 Marathon Group                                 $6,490  $5,597 $16,822  $16,638
 U. S. Steel Group                               1,334   1,497   3,849    4,926
 Eliminations                                      (14)     (3)    (41)    (13)
                                               ------- ------- -------  -------
   Total                                        $7,810  $7,091 $20,630  $21,551


INCOME FROM OPERATIONS

 Marathon Group                                   $561    $215  $1,363   $1,070
 U. S. Steel Group                                 (29)    105      72      484
                                                ------  ------  ------  ------
   Total                                          $532    $320  $1,435   $1,554




CASH FLOW DATA
- --------------

CAPITAL EXPENDITURES

 Marathon Group                                   $295    $285    $827     $835
 U. S. Steel Group                                  68      92     221      228
                                                ------  ------  ------   ------
   Total                                          $363    $377  $1,048   $1,063


INVESTMENTS (RETURNS) & OTHER AFFILIATE ACTIVITY - NET

 Marathon Group                                    $49    $49    $105      $52
 U. S. Steel Group                                  15      3      15       66
                                                ------  ------  ------   ------
   Total                                           $64    $52    $120     $118




</TABLE>
<PAGE> 34

Part I - Financial Information (Continued):
<TABLE>
<CAPTION>
   B.  Marathon Group

                        MARATHON GROUP OF USX CORPORATION
                       STATEMENT OF OPERATIONS (Unaudited)
                       -----------------------------------

                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions, except per share amounts)  1999    1998    1999     1998
- --------------------------------------------------------------------------------
<S>                                            <C>     <C>     <C>      <C>
REVENUES:
 Sales                                          $6,464  $5,582 $16,751  $16,315
 Dividend and affiliate income                      14       9      58       37
 Gain (loss) on disposal of assets                  (6)      3     (17)      19
 Gain (loss) on ownership change in Marathon
  Ashland Petroleum LLC                             11      (1)     11      245
 Other income                                        7       4      19       22
                                                ------  ------  ------   ------
   Total revenues                                6,490   5,597  16,822   16,638
                                                ------  ------  ------   ------
COSTS AND EXPENSES:
 Cost of sales (excludes items shown below)      4,621   3,886  11,695   11,271
 Selling, general and administrative expenses      121     132     375      383
 Depreciation, depletion and amortization          219     222     678      701
 Taxes other than income taxes                   1,064   1,046   3,100    2,988
 Exploration expenses                               40      46     162      203
 Inventory market valuation charges (credits)     (136)     50    (551)      22
                                                ------  ------  ------   ------
   Total costs and expenses                      5,929   5,382  15,459   15,568
                                                ------  ------  ------   ------
INCOME FROM OPERATIONS                             561     215   1,363    1,070
Net interest and other financial costs              72      63     218      166
Minority interest in income of Marathon Ashland
 Petroleum LLC                                     148      70     405      282
                                                ------  ------  ------   ------
INCOME BEFORE INCOME TAXES                         341      82     740      622
Provision for estimated income taxes               111      31     257      226
                                                ------  ------  ------   ------
NET INCOME                                        $230     $51    $483     $396
                                                ======  ======  ======   ======
MARATHON STOCK DATA:
 Net income per share
   - Basic                                        $.74    $.18   $1.56    $1.37
   - Diluted                                       .74     .17    1.56     1.36

 Dividends paid per share                          .21     .21     .63      .63

 Weighted average shares, in thousands
   - Basic                                     309,392 291,320 309,160  289,928
   - Diluted                                   309,810 291,803 309,491  290,528



<FN>
Selected notes to financial statements appear on pages 37-45.
</TABLE>
<PAGE> 35
<TABLE>
<CAPTION>
                        MARATHON GROUP OF USX CORPORATION
                            BALANCE SHEET (Unaudited)
                        ---------------------------------

                                                   September 30 December 31
(Dollars in millions)                                  1999         1998
- --------------------------------------------------------------------------------
<S>                                                  <C>           <C>
ASSETS

Current assets:
  Cash and cash equivalents                              $87          $137
  Receivables, less allowance for doubtful
   accounts of $3 and $3                               1,686         1,277
  Inventories                                          1,919         1,310
  Deferred income tax benefits                            80            80
  Other current assets                                   230           172
                                                      ------        ------
     Total current assets                              4,002         2,976

Investments and long-term receivables                    742           603
Property, plant and equipment, less accumulated
 depreciation, depletion and amortization of
 $10,624 and $10,299                                  10,196        10,429
Prepaid pensions                                         207           241
Other noncurrent assets                                  266           295
                                                      ------        ------
     Total assets                                    $15,413       $14,544
                                                      ======        ======
LIABILITIES

Current liabilities:
  Notes payable                                          $66          $132
  Accounts payable                                     2,313         1,980
  Distribution payable to minority shareholder of
   Marathon Ashland Petroleum LLC                          -           103
  Payroll and benefits payable                           148           150
  Accrued taxes                                          181            99
  Accrued interest                                        51            87
  Long-term debt due within one year                      44            59
                                                      ------        ------
     Total current liabilities                         2,803         2,610

Long-term debt, less unamortized discount              3,497         3,456
Long-term deferred income taxes                        1,533         1,450
Employee benefits                                        556           553
Deferred credits and other liabilities                   418           389
Preferred stock of subsidiary                            184           184

Minority interest in Marathon Ashland Petroleum LLC    1,773         1,590

COMMON STOCKHOLDERS' EQUITY                            4,649         4,312
                                                      ------        ------
   Total liabilities and common stockholders' equity $15,413       $14,544
                                                      ======        ======


<FN>
Selected notes to financial statements appear on pages 37-45.
</TABLE>
<PAGE> 36
<TABLE>
<CAPTION>
                        MARATHON GROUP OF USX CORPORATION
                       STATEMENT OF CASH FLOWS (Unaudited)
                       -----------------------------------


                                                       Nine Months Ended
                                                          September 30
(Dollars in millions)                                  1999         1998
- --------------------------------------------------------------------------------
<S>                                                   <C>          <C>
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS
OPERATING ACTIVITIES:
Net income                                              $483          $396
Adjustments to reconcile to net cash provided from
 operating activities:
  Minority interest in income of Marathon Ashland
   Petroleum LLC                                         405           282
  Depreciation, depletion and amortization               678           701
  Exploratory dry well costs                              74           111
  Inventory market valuation charges (credits)          (551)           22
  Pensions and other postretirement benefits              41             7
  Deferred income taxes                                   89           140
Gain on ownership change in Marathon Ashland
   Petroleum LLC                                         (11)         (245)
  (Gain) loss on disposal of assets                       17           (19)
  Changes in:
     Current receivables                                (667)           13
Inventories                                              (95)          (77)
     Current accounts payable and accrued expenses       691            19
  All other - net                                        (10)          (15)
                                                      ------        ------
     Net cash provided from operating activities       1,144         1,335
                                                      ------        ------
INVESTING ACTIVITIES:
Capital expenditures                                    (827)         (835)
Acquisition of Tarragon Oil and Gas Limited                -          (686)
Disposal of assets                                       255            44
Restricted cash -withdrawals                              39             5
             - deposits                                  (25)          (25)
Affiliates - investments - net                            (1)          (30)
         - loans and advances                           (104)          (85)
         - repayments of loans and advances                -            63
All other - net                                          (10)          (13)
                                                      ------        ------
     Net cash used in investing activities              (673)       (1,562)
                                                      ------        ------
FINANCING ACTIVITIES:
Increase (decrease) in Marathon Group's portion of USX
 consolidated debt                                       (41)        1,018
Specifically attributed debt borrowings                  141           365
                        - repayments                    (141)         (365)
Marathon Stock issued                                     46            84
Dividends paid                                          (193)         (183)
Distributions to minority shareholder of Marathon
 Ashland Petroleum LLC                                  (333)         (211)
                                                       ------        ------
 Net cash provided from (used in) financing activities  (521)          708
                                                       ------        ------
EFFECT OF EXCHANGE RATE CHANGES ON CASH                    -             1
                                                       ------       ------
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS     (50)          482
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR           137            36
                                                      ------        ------
CASH AND CASH EQUIVALENTS AT END OF PERIOD               $87          $518
                                                      ======        ======
Cash used in operating activities included:
  Interest and other financial costs paid (net of
   amount capitalized)                                 $(250)        $(227)
  Income taxes paid, including settlements with the
   U. S. Steel Group                                     (31)         (149)

<FN>
Selected notes to financial statements appear on pages 37-45.
</TABLE>
<PAGE> 37

                        MARATHON GROUP OF USX CORPORATION
                     SELECTED NOTES TO FINANCIAL STATEMENTS
                     --------------------------------------
                                   (Unaudited)


     1.   The information furnished in these financial statements is unaudited
     but, in the opinion of management, reflects all adjustments necessary for a
     fair presentation of the results for the periods covered.  All such
     adjustments are of a normal recurring nature unless disclosed otherwise.
     These financial statements, including selected notes, have been prepared in
     accordance with the applicable rules of the Securities and Exchange
     Commission and do not include all of the information and disclosures
     required by generally accepted accounting principles for complete financial
     statements.  Certain reclassifications of prior year data have been made to
     conform to 1999 classifications.  Additional information is contained in
     the USX Annual Report on Form 10-K for the year ended December 31, 1998.

     2.   The financial statements of the Marathon Group include the financial
     position, results of operations and cash flows for the businesses of
     Marathon Oil Company (Marathon) and certain other subsidiaries of USX, and
     a portion of the corporate assets and liabilities and related transactions
     which are not separately identified with ongoing operating units of USX.
     These financial statements are prepared using the amounts included in the
     USX consolidated financial statements.  Corporate amounts reflected in
     these financial statements are determined based upon methods which
     management believes to be reasonable.  The accounting policies applicable
     to the preparation of the financial statements of the Marathon Group may be
     modified or rescinded in the sole discretion of the Board of Directors of
     USX (Board), although the Board has no present intention to do so.  The
     Board may also adopt additional policies depending on the circumstances.

          Although the financial statements of the Marathon Group and the U. S.
     Steel Group separately report the assets, liabilities (including contingent
     liabilities) and stockholders' equity of USX attributed to each such Group,
     such attribution of assets, liabilities (including contingent liabilities)
     and stockholders' equity between the Marathon Group and the U. S. Steel
     Group for the purpose of preparing their respective financial statements
     does not affect legal title to such assets and responsibility for such
     liabilities.  Holders of USX-Marathon Group Common Stock (Marathon Stock)
     and USX-U. S. Steel Group Common Stock (Steel Stock) are holders of common
     stock of USX and continue to be subject to all the risks associated with an
     investment in USX and all of its businesses and liabilities.  Financial
     impacts arising from one Group that affect the overall cost of USX's
     capital could affect the results of operations and financial condition of
     the other Group.  In addition, net losses of either Group, as well as
     dividends or distributions on any class of USX Common Stock or series of
     Preferred Stock and repurchases of any class of USX Common Stock or series
     of Preferred Stock at prices in excess of par or stated value, will reduce
     the funds of USX legally available for payment of dividends on both classes
     of Common Stock.  Accordingly, the USX consolidated financial information
     should be read in connection with the Marathon Group financial information.

<PAGE> 38

                        MARATHON GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     2.   (Continued)

          The financial statement provision for estimated income taxes and
     related tax payments or refunds have been reflected in the Marathon Group
     and the U. S. Steel Group financial statements in accordance with USX's tax
     allocation policy for such groups.  In general, such policy provides that
     the consolidated tax provision and related tax payments or refunds are
     allocated between the Marathon Group and the U. S. Steel Group for group
     financial statement purposes, based principally upon the financial income,
     taxable income, credits, preferences and other amounts directly related to
     the respective groups.

          The provision for estimated income taxes for the Marathon Group is
     based on tax rates and amounts which recognize management's best estimate
     of current and deferred tax assets and liabilities.  Differences between
     the combined interim tax provisions of the Marathon and U. S. Steel Groups
     and USX consolidated are allocated to each group based on the relationship
     of the individual group provisions to the combined interim provisions.

     3.   The Marathon Group's total comprehensive income for the third quarter
     of 1999 and 1998 was $233 million and $49 million, respectively, and $488
     million and $393 million for the nine months of 1999 and 1998,
     respectively.

     4.   In the second quarter of 1999, Marathon Ashland Petroleum LLC (MAP)
     sold Scurlock Permian LLC (Scurlock), its crude oil gathering business, to
     Plains Marketing, L.P for $137 million.  During the nine months of 1999,
     MAP recorded a pretax loss of $16 million related to the sale.  Scurlock
     had been reported as part of the Marathon Group's refining, marketing and
     transportation operating segment.

    On June 1, 1999, the Marathon Group announced that it had signed a
    definitive agreement to sell Carnegie Natural Gas Company and affiliated
    subsidiaries (Carnegie) to Equitable Resources, Inc.  The transaction is
    expected to close later this year.  Carnegie is engaged in natural gas
    production, transmission, distribution, sales and storage activities in
    Pennsylvania and West Virginia.  At September 30, 1999, the net assets held
    for sale have been included in other current assets in the balance sheet.
    During the second and third quarters of 1999, the Marathon Group recorded
    an estimated pretax loss of $8 million related to the sale.  Carnegie has
    been reported as part of the Marathon Group's other energy related
    businesses operating segment.

     5.   The Marathon Group's operations consists of three reportable operating
     segments: 1) Exploration and Production (E&P) - explores for and produces
     crude oil and natural gas on a worldwide basis; 2) Refining, Marketing and
     Transportation (RM&T) - refines, markets and transports crude oil and
     petroleum products, primarily in the Midwest and southeastern United States
     through MAP; and 3) Other Energy Related Businesses (OERB).  OERB is an
     aggregation of two segments which fall below the quantitative reporting
     thresholds: 1) Natural Gas and Crude Oil Marketing and Transportation -
     markets and transports its own and third-party natural gas and crude oil in
     the United States; and 2) Power Generation - develops, constructs and
     operates independent electric power projects worldwide.  The results of
     segment operations are as follows:
<PAGE> 39
<TABLE>
<CAPTION>
                        MARATHON GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     5.   (Continued)

                                                                         Total
(In millions)                                    E&P     RM&T    OERB   Segments
- --------------------------------------------------------------------------------
<S>                                               <C>   <C>       <C>    <C>
THIRD QUARTER 1999
Revenues:
 Customer                                         $820  $5,413    $219   $6,452
 Intersegment (a)                                   61      16       9       86
 Intergroup (a)                                      5       -       7       12
 Equity in earnings (losses) of
  unconsolidated affiliates                         (2)      6       5        9
 Other                                               1      12       3       16
                                                ------  ------  ------   ------
   Total revenues                                 $885  $5,447    $243   $6,575
                                                ======  ======  ======   ======
Segment income                                    $201    $236     $13     $450
                                                ======  ======  ======   ======

THIRD QUARTER 1998
Revenues:
 Customer                                         $534  $4,976     $72   $5,582
 Intersegment (a)                                   29       7       1       37
 Intergroup (a)                                      1       -       1        2
 Equity in earnings of
  unconsolidated affiliates                          -       4       2        6
 Other                                               2       5       3       10
                                                ------  ------  ------   ------
   Total revenues                                 $566  $4,992     $79   $5,637
                                                ======  ======  ======   ======
Segment income                                     $60    $224      $6     $290
                                                ======  ======  ======   ======
<FN>
(a)  Intersegment and intergroup sales and transfers were conducted on an arm's-
    length basis.
</TABLE>

<PAGE> 40
<TABLE>
<CAPTION>
                        MARATHON GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     5.   (Continued)


                                                                         Total
(In millions)                                    E&P     RM&T    OERB   Segments
- --------------------------------------------------------------------------------
<S>                                             <C>    <C>        <C>   <C>
NINE MONTHS ENDED SEPTEMBER 30, 1999
Revenues:
 Customer                                       $2,081 $14,229    $414  $16,724
 Intersegment (a)                                  129      25      24      178
 Intergroup (a)                                     12       -      15       27
 Equity in earnings of
  unconsolidated affiliates                          2      13      18       33
 Other                                              20      28      12       60
                                                ------  ------  ------   ------
   Total revenues                               $2,244 $14,295    $483  $17,022
                                                ======  ======  ======   ======
Segment income                                    $361    $509     $47     $917
                                                ======  ======  ======   ======

NINE MONTHS ENDED SEPTEMBER 30, 1998
Revenues:
 Customer                                       $1,551 $14,496    $234  $16,281
 Intersegment (a)                                  113       9       5      127
 Intergroup (a)                                      7       -       5       12
 Equity in earnings of
  unconsolidated affiliates                          1      10       8       19
 Other                                              23      29       8       60
                                                ------  ------  ------   ------
   Total revenues                               $1,695 $14,544    $260  $16,499
                                                ======  ======  ======   ======
Segment income                                    $257    $749     $23   $1,029
                                                ======  ======  ======   ======
<FN>
(a)  Intersegment and intergroup sales and transfers were conducted on an arm's-
    length basis.
</TABLE>
<PAGE> 41

                        MARATHON GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     5.   (Continued)



    The following schedules reconcile segment revenues and income to amounts
    reported in the Marathon Group financial statements:
<TABLE>
<CAPTION>
                                                      Third Quarter Ended
                                                          September 30
(In millions)                                          1999         1998
- --------------------------------------------------------------------------------
<S>                                                   <C>           <C>
Revenues:
  Revenues of reportable segments                     $6,575        $5,637
  Items not allocated to segments:
   Gain (loss) on ownership change in MAP                 11            (1)
   Other                                                 (10)            -
  Elimination of intersegment revenues                   (86)          (37)
  Administrative revenues                                  -            (2)
                                                      ------        ------
     Total Group revenues                             $6,490        $5,597
                                                      ======        ======

Income:
  Income for reportable segments                        $450          $290
  Items not allocated to segments:
   Gain (loss) on ownership change in MAP                 11            (1)
   Administrative expenses                               (26)          (25)
   Inventory market valuation adjustments                136           (50)
   Other (a)                                             (10)            1
                                                      ------        ------
     Total Group income from operations                 $561          $215
                                                      ======        ======
<FN>
(a)Represents mainly in 1999, loss on sale of certain domestic production
   properties.
</TABLE>
<PAGE> 42

                        MARATHON GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     5.   (Continued)
<TABLE>
<CAPTION>
                                                       Nine Months Ended
                                                          September 30
(In millions)                                          1999         1998
- --------------------------------------------------------------------------------
<S>                                                  <C>           <C>
Revenues:
  Revenues of reportable segments                    $17,022       $16,499
  Items not allocated to segments:
   Gain on ownership change in MAP                        11           245
   Other                                                 (33)           24
  Elimination of intersegment revenues                  (178)         (127)
  Administrative revenues                                  -            (3)
                                                      ------        ------
     Total Group revenues                            $16,822       $16,638
                                                      ======        ======

Income:
  Income for reportable segments                        $917        $1,029
  Items not allocated to segments:
   Gain on ownership change in MAP                        11           245
   Administrative expenses                               (83)          (84)
   Inventory market valuation adjustments                551           (22)
   Other (a)                                             (33)          (98)
                                                      ------        ------
     Total Group income from operations               $1,363        $1,070
                                                      ======        ======

<FN>
(a)Represents in 1999, mainly the loss on sale of Scurlock, Carnegie, and
   certain domestic production properties, and in 1998, international
   exploration and production property impairments, MAP transition charges and
   gas contract settlement.
</TABLE>


     6.   The items below are included in both revenues and costs and expenses,
     resulting in no effect on income.
<TABLE>
<CAPTION>
                                                  (In millions)
                                        -------------------------------
                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
                                                 1999    1998    1999     1998
                                                 ----    ----    ----     ----
    <S>                                         <C>     <C>     <C>      <C>
    Consumer excise taxes on petroleum
      products and merchandise                  $1,007  $1,000  $2,923   $2,834
    Matching crude oil and refined product
      buy/sell transactions settled in cash        901   1,012   2,471    2,994
</TABLE>
PAGE> 43

                        MARATHON GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     7.   The method of calculating net income (loss) per common share for the
     Marathon Stock and Steel Stock reflects the Board's intent that the
     separately reported earnings and surplus of the Marathon Group and the
     U. S. Steel Group, as determined consistent with the USX Restated
     Certificate of Incorporation, are available for payment of dividends on the
     respective classes of stock, although legally available funds and
     liquidation preferences of these classes of stock do not necessarily
     correspond with these amounts.

          Basic net income per share is based on the weighted average number of
     common shares outstanding.

          Diluted net income per share assumes conversion of convertible
     securities for the applicable periods outstanding and assumes exercise of
     stock options, provided in each case, the effect is not antidilutive.

          See Note 9 of the Notes to USX Consolidated Financial Statements for
     the computation of income (loss) per share.

     8.   Inventories are carried at the lower of cost or market.  Cost of
     inventories of crude oil and refined products is determined under the last-
     in, first-out (LIFO) method.
<TABLE>
<CAPTION>
                                                         (In millions)
                                                   -------------------------
                                                   September 30 December 31
                                                       1999         1998
                                                   ------------ -----------
    <S>                                               <C>          <C>
    Crude oil and natural gas liquids                   $692         $731
    Refined products and merchandise                   1,119        1,023
    Supplies and sundry items                            108          107
                                                      ------        ------
      Total (at cost)                                  1,919        1,861
    Less inventory market valuation reserve                -          551
                                                      ------        ------
      Net inventory carrying value                    $1,919       $1,310
                                                      ======        ======
</TABLE>
          The inventory market valuation reserve reflects the extent that the
     recorded LIFO cost basis of crude oil and refined products inventories
     exceeds net realizable value.  The reserve is decreased to reflect
     increases in market prices and inventory turnover and increased to reflect
     decreases in market prices.  Changes in the inventory market valuation
     reserve result in noncash charges or credits to costs and expenses.  For
     additional information, see discussion of results of operations in the
     Marathon Group's Management's Discussion and Analysis of Financial
     Condition and Results of Operations.

     9.   At September 30, 1999, accounts payable includes an estimated income
     tax payable to the U. S. Steel Group of $59 million, determined in
     accordance with the tax allocation policy discussed in Note 2.

<PAGE> 44

                        MARATHON GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     10.  During 1997, Marathon and Ashland Inc. (Ashland) agreed to combine the
     major elements of their refining, marketing and transportation (RM&T)
     operations.  On January 1, 1998, Marathon transferred certain RM&T net
     assets to MAP, a new consolidated subsidiary.  Also on January 1, 1998,
     Marathon acquired certain RM&T net assets from Ashland in exchange for a
     38% interest in MAP.  The acquisition was accounted for under the purchase
     method of accounting.  The purchase price was determined to be
     $1.9 billion, based upon an external valuation.  The change in Marathon's
     ownership interest in MAP resulted in a gain of $245 million, which is
     included in the first nine months 1998 revenues.  In accordance with MAP
     closing agreements, Marathon and Ashland made capital contributions to MAP
     for environmental improvements, approximating $2 million and $19 million,
     respectively.  The closing agreements stipulate that ownership interests in
     MAP will not be adjusted as a result of such contributions.  Accordingly,
     Marathon recognized a gain on ownership change of $11 million in the third
     quarter of 1999.

          Effective August 11, 1998, Marathon acquired Tarragon Oil and Gas
     Limited (Tarragon), a Canadian oil and gas exploration and production
     company.  Results for 1999 include the operations of Marathon Canada
     Limited, formerly known as Tarragon.

     11.  USX is the subject of, or a party to, a number of pending or
     threatened legal actions, contingencies and commitments relating to the
     Marathon Group involving a variety of matters, including laws and
     regulations relating to the environment.  Certain of these matters are
     discussed below.  The ultimate resolution of these contingencies could,
     individually or in the aggregate, be material to the Marathon Group
     financial statements.  However, management believes that USX will remain a
     viable and competitive enterprise even though it is possible that these
     contingencies could be resolved unfavorably to the Marathon Group.  See
     discussion of Liquidity in USX Consolidated Management's Discussion and
     Analysis of Financial Condition and Results of Operations.

          The Marathon Group is subject to federal, state, local and foreign
     laws and regulations relating to the environment.  These laws generally
     provide for control of pollutants released into the environment and require
     responsible parties to undertake remediation of hazardous waste disposal
     sites.  Penalties may be imposed for noncompliance.  At September 30, 1999,
     and December 31, 1998, accrued liabilities for remediation totaled $69
     million and $48 million, respectively.  It is not presently possible to
     estimate the ultimate amount of all remediation costs that might be
     incurred or the penalties that may be imposed.  Receivables for recoverable
     costs from certain states, under programs to assist companies in cleanup
     efforts related to underground storage tanks at retail marketing outlets,
     were $53 million at September 30, 1999, and $41 million at December 31,
     1998.

          For a number of years, the Marathon Group has made substantial capital
     expenditures to bring existing facilities into compliance with various laws
     relating to the environment.  In the first nine months of 1999 and for the
     years 1998 and 1997, such capital expenditures totaled $39 million, $124
     million and $81 million, respectively.  The Marathon Group anticipates
     making additional such expenditures in the future; however, the exact
     amounts and timing of such expenditures are uncertain because of the
     continuing evolution of specific regulatory requirements.

<PAGE> 45

                        MARATHON GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     11.  (Continued)

         At September 30, 1999, and December 31, 1998, accrued liabilities for
    platform abandonment and dismantlement totaled $147 million and $141
    million, respectively.

          Guarantees by USX and its consolidated subsidiaries of the liabilities
     of an affiliated entity of the Marathon Group totaled $131 million at
     September 30, 1999, and December 31, 1998.

          At September 30, 1999, the Marathon Group's pro rata share of
     obligations of LOOP LLC and various pipeline affiliates secured by
     throughput and deficiency agreements totaled $153 million.  Under the
     agreements, the Marathon Group is required to advance funds if the
     affiliates are unable to service debt.  Any such advances are prepayments
     of future transportation charges.

          The Marathon Group's contract commitments to acquire property, plant
     and equipment and long-term investments at September 30, 1999, totaled
     $788 million compared with $624 million at December 31, 1998.



<PAGE> 46
                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     The Marathon Group includes Marathon Oil Company ("Marathon") and certain
other subsidiaries of USX Corporation ("USX"), which are engaged in worldwide
exploration and production of crude oil and natural gas; domestic refining,
marketing and transportation of petroleum products primarily through Marathon
Ashland Petroleum ("MAP"), owned 62% by Marathon; and other energy related
businesses.  The Management's Discussion and Analysis should be read in
conjunction with the Marathon Group's Financial Statements and Notes to
Financial Statements.  The discussion of Results of Operations should be read in
conjunction with the Supplemental Statistics provided on page 65.

     Certain sections of Management's Discussion and Analysis include forward-
looking statements concerning trends or events potentially affecting the
businesses of the Marathon Group.  These statements typically contain words such
as "anticipates", "believes", "estimates", "expects", "targets", "scheduled" or
similar words indicating that future outcomes are uncertain.  In accordance with
"safe harbor" provisions of the Private Securities Litigation Reform Act of
1995, these statements are accompanied by cautionary language identifying
important factors, though not necessarily all such factors, that could cause
future outcomes to differ materially from those set forth in forward-looking
statements.  For additional risk factors affecting the businesses of the
Marathon Group, see Supplementary Data - Disclosures About Forward-Looking
Statements in the USX Annual Report on Form 10-K for the year ended December 31,
1998.
<PAGE> 47
                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

Results of Operations
- ---------------------
     Revenues for the third quarter and first nine months of 1999 and 1998 are
summarized in the following table:
<TABLE>
<CAPTION>
                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions)                            1999    1998    1999     1998
                                                -----   -----   -----    -----
<S>                                            <C>     <C>    <C>      <C>
Exploration & production ("E&P")                  $885    $566  $2,244   $1,695
Refining, marketing & transportation ("RM&T")    5,447   4,992  14,295   14,544
Other energy related businesses (a)                243      79     483      260
                                                ------  ------  ------   ------
     Revenues of reportable segments            $6,575  $5,637 $17,022  $16,499

Revenues not allocated to segments:
 Gain (loss) on ownership change in MAP             11      (1)     11      245
 Other (b)                                         (10)      -     (33)      24
Elimination of intersegment revenues               (86)    (37)   (178)    (127)
Administrative revenues                              -      (2)      -       (3)
                                                ------  ------  ------   ------
     Total Group revenues                       $6,490  $5,597 $16,822  $16,638
                                                ======  ======  ======   ======
</TABLE>
<TABLE>
<CAPTION>
Items included in both revenues and costs and expenses, resulting in no effect
on income:

<S>                                             <C>     <C>     <C>      <C>
Consumer excise taxes on petroleum
  products and merchandise                      $1,007  $1,000  $2,923   $2,834
Matching crude oil and refined product
  buy/sell transactions settled in cash:
    E&P                                            176      94     451      243
    RM&T                                           725     918   2,020    2,751
- ---------
<FN>
(a)Includes domestic natural gas and crude oil marketing and transportation,
   and power generation.
(b)For the third quarter 1999, this represents a loss on the sale of certain
   domestic production properties, partially offset by a gain on the sale of
   certain Egyptian properties.  For the first nine months of 1999, this also
   includes the loss on the sale of Scurlock Permian LLC and the estimated loss
   on the sale of Carnegie Natural Gas Company and affiliated subsidiaries.
</TABLE>
     E&P segment revenues increased by $319 million in the third quarter of 1999
from the comparable prior-year period.  The increase primarily reflected higher
worldwide liquid hydrocarbon prices, higher domestic gas prices and increased
E&P crude oil buy/sell volumes.  For the first nine months of 1999, E&P segment
revenues increased by $549 million from the prior-year period due to higher
domestic liquid hydrocarbon prices and volumes, higher international gas volumes
and increased E&P crude oil buy/sell volumes, partially offset by lower
international natural gas prices.
<PAGE> 48
                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     RM&T segment revenues increased by $455 million in the third quarter of
1999 from the comparable prior-year period.  The increase primarily reflected
higher refined product prices, increased volumes of refined product sales and
higher merchandise sales, partially offset by reduced revenues resulting from
the sale of Scurlock Permian LLC.  For the first nine months of 1999, RM&T
segment revenues decreased by $249 million from the comparable prior-year
period.  The decrease primarily reflected reduced revenues resulting from the
sale of Scurlock Permian LLC, partially offset by higher refined product prices,
increased volumes of refined product sales and higher merchandise sales.
Merchandise sales increased by $51 million and $159 million from last year's
third quarter and first nine months, respectively.

     Other energy related businesses segment revenues increased by $164 million
in the third quarter of 1999 from the comparable prior-year period.  For the
first nine months of 1999, revenues increased by $223 million from the prior-
year period.  The increase in both periods primarily reflected increased crude
oil and natural gas purchase and resale activity.

<PAGE> 49
                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     Income from operations for the third quarter and first nine months of 1999
and 1998 is set forth in the following table:
<TABLE>
<CAPTION>
                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions)                            1999    1998    1999     1998
                                                -----   -----   -----    -----
<S>                                               <C>     <C>   <C>      <C>
E&P
 Domestic                                         $168     $44    $299     $159
 International                                      33      16      62       98
                                                ------  ------  ------   ------
   Income for E&P reportable segment               201      60     361      257
RM&T                                               236     224     509      749
Other energy related businesses                     13       6      47       23
                                                ------  ------  ------   ------
     Income for reportable segments               $450    $290    $917   $1,029

Items not allocated to segments:
 Administrative expenses (a)                      $(26)   $(25)   $(83)    $(84)
 IMV reserve adjustment (b)                        136     (50)    551      (22)
 Loss on disposal of assets (c)                    (10)      -     (33)       -
 Gain on ownership change & trans. charges-MAP (d)  11       -      11      223
 E&P int'l impairment & dom. contract settlement (e) -       -       -      (76)
                                                ------  ------  ------   ------
     Total Group income from operations           $561    $215  $1,363   $1,070
                                                ======  ======  ======   ======
- --------
<FN>
 (a)    Includes the portion of the Marathon Group's administrative costs not
   charged to the operating segments and the portion of USX corporate general
   and administrative costs allocated to the Marathon Group.
(b)The inventory market valuation ("IMV") reserve reflects the extent to which
   the recorded LIFO cost basis of crude oil and refined products inventories
   exceeds net realizable value.  See Note 8 to the Marathon Group Financial
   Statements.
(c)For the third quarter of 1999, this represents a loss on the sale of certain
   domestic production properties, partially offset by a gain on the sale of
   certain Egyptian properties.  For the first nine months of 1999, this also
   includes the loss on the sale of Scurlock Permian LLC and the estimated loss
   on the sale of Carnegie Natural Gas Company and affiliated subsidiaries.
(d)The gain on ownership change and one-time transition charges in 1998 relate
   to the formation of MAP.  In addition, Marathon recognized a gain on
   ownership change of $11 million in the third quarter of 1999.  For
   additional discussion of the gain on ownership change in MAP, see Note 10 to
   the Marathon Group Financial Statements.
(e)This represents a write-off of certain non-revenue producing international
   investments and the gain from the resolution of contract disputes with a
   purchaser of the Marathon Group's natural gas production from certain
   domestic properties.
</TABLE>
<PAGE> 50
                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     Income for reportable segments in the third quarter of 1999 increased by
$160 million from last year's third quarter, due primarily to higher worldwide
liquid hydrocarbon and domestic natural gas prices, partially offset by lower
refined product margins.  Income for reportable segments in the first nine
months of 1999 decreased by $112 million from the first nine months of 1998, due
primarily to lower refined product margins, partially offset by higher worldwide
liquid hydrocarbon prices.

     Worldwide E&P ("upstream") segment income in the third quarter of 1999
increased by $141 million from last year's third quarter.  Results in the first
nine months of 1999 increased by $104 million from the same period in 1998.

     Domestic E&P income in the third quarter of 1999 increased by $124 million
from last year's third quarter.  This increase was mainly due to higher liquid
hydrocarbon and natural gas prices.  Results in the first nine months of 1999
increased by $140 million from the same period in 1998.  The increase was
primarily due to higher liquid hydrocarbon prices, lower exploration expense and
increased liquid hydrocarbon volumes.

     International E&P income in the third quarter of 1999 increased by $17
million from last year's third quarter.  This increase was mainly due to higher
liquid hydrocarbon prices, partially offset by a decrease in liquid hydrocarbon
volumes resulting from lower production and liftings in the United Kingdom and
the sale of certain Egyptian properties.  Results in the first nine months of
1999 decreased by $36 million from the same period in 1998.  This decrease was
mainly due to a decrease in liquid hydrocarbon and natural gas volumes resulting
from lower production and liftings in the United Kingdom, lower natural gas
prices and higher exploration expense, partially offset by higher liquid
hydrocarbon prices.

     RM&T segment income in the third quarter of 1999 increased by $12 million
from last year's third quarter.  This increase was mainly due to higher
merchandise sales at Speedway SuperAmerica LLC, lower expenses and increased
refined product sales volumes, partially offset by lower refined product
margins.  Results in the first nine months of 1999 decreased by $240 million
from the same period in 1998.  This decrease was mainly due to lower refined
product margins, partially offset by recognized mark-to-market derivative gains
from nonhedging activities, higher merchandise sales at Speedway SuperAmerica
LLC and increased refined product sales volumes.

     Other energy related businesses segment income in the third quarter of 1999
increased by $7 million from last year's third quarter.  This increase was
mainly due to higher equity earnings as a result of increased pipeline
throughput and higher margins on crude oil purchases for resale.  Results in the
first nine months of 1999 increased by $24 million from the same period in 1998.
This increase was mainly due to a reversal of abandonment accruals of $10
million in the second quarter of 1999 and higher equity earnings as a result of
increased pipeline throughput.
<PAGE> 51
                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

Items not allocated to segments

     IMV reserve adjustment - When U. S. Steel Corporation acquired Marathon Oil
Company in March 1982, crude oil and refined product prices were at historically
high levels.  In applying the purchase method of accounting, the Marathon
Group's crude oil and refined product inventories were revalued by reference to
current prices at the time of acquisition, and this became the new LIFO cost
basis of the inventories.  Generally accepted accounting principles require that
inventories be carried at lower of cost or market.  Accordingly, the Marathon
Group has established an IMV reserve to reduce the cost basis of its inventories
to net realizable value.  Quarterly adjustments to the IMV reserve result in
noncash charges or credits to income from operations.

     When Marathon acquired the crude oil and refined product inventories
associated with Ashland's RM&T operations on January 1, 1998, the Marathon Group
established a new LIFO cost basis for those inventories.  The acquisition cost
of these inventories lowered the overall average cost of the Marathon Group's
combined RM&T inventories.  As a result, the price threshold at which an IMV
reserve will be recorded has also been lowered.  This acquisition resulted in a
one-time reduction in the IMV reserve, yielding a net favorable IMV reserve
adjustment of $25 million in the first quarter of 1998.

These adjustments affect the comparability of financial results from period to
period as well as comparisons with other energy companies, many of which do
not have such adjustments.  Therefore, the Marathon Group reports separately
the effects of the IMV reserve adjustments on financial results.  In
management's opinion, the effects of such adjustments should be considered
separately when evaluating operating performance.

     Net interest and other financial costs in the first nine months of 1999
increased by $52 million from the comparable 1998 period, mainly due to lower
interest income, lower capitalized interest on upstream projects and increased
costs resulting from higher average debt levels.

     The provision for estimated income taxes in the third quarter and first
nine months of 1999 increased by $80 million and $31 million, respectively from
the comparable 1998 periods.  These increases were primarily due to an increase
in income before taxes.

     Net income for the third quarter and first nine months increased by $179
million and $87 million, respectively, in 1999 from 1998, primarily reflecting
the factors discussed above.

Cash Flows
- ----------
     Net cash provided from operating activities was $1,144 million in the first
nine months of 1999, compared with $1,335 million in the first nine months of
1998.  The $191 million decrease mainly reflected lower net income (excluding
the IMV reserve adjustment and other noncash items).

     Capital expenditures in the first nine months of 1999 totaled $827 million,
compared with $835 million in the comparable 1998 period.  For additional
information regarding capital expenditures, refer to the Supplemental Statistics
on page 65.

<PAGE> 52

                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     Cash from disposal of assets was $255 million in the first nine months
1999, compared with $44 million in the comparable 1998 period.  Proceeds in 1999
were mainly from the sale of Scurlock Permian LLC and domestic and international
production properties.

     Restricted cash was a net withdrawal of $14 million in the first nine
months of 1999, compared to a net deposit of $20 million in the comparable 1998
period.  The 1999 amount primarily represents net cash withdrawn for the
purchase of domestic production properties.  The 1998 amount primarily
represents cash deposited from the sales of domestic production properties and
equipment.

     Net investments in affiliates of $30 million in the first nine months of
1998 primarily included MAP's acquisition of an interest in Southcap Pipe Line
Company.

     Loans and advances to affiliates were $104 million in the first nine months
of 1999, compared with $85 million in the comparable 1998 period.  Cash outflows
in both periods mainly reflected funding provided to equity affiliates for
capital projects, primarily the Sakhalin II project in Russia.

     Repayments of loans and advances to affiliates were $63 million in the
first nine months of 1998 as a result of repayments by Sakhalin Energy
Investment Company, Ltd. of advances made by Marathon in conjunction with the
Sakhalin II project in Russia.

     Contract commitments for property, plant and equipment acquisitions and
long-term investments at September 30, 1999 totaled $788 million compared with
$624 million at December 31, 1998.

     Financial obligations, which consist of the Marathon Group's portion of USX
debt and preferred stock of a subsidiary attributed to both groups, as well as
debt specifically attributed to the Marathon Group, decreased by $41 million in
the first nine months of 1999.

     Distributions to minority shareholder of MAP were $333 million in the first
nine months of 1999, compared with $211 million in the comparable 1998 period.
The increase was primarily due to a distribution of $103 million in the first
quarter 1999, which related to fourth quarter 1998 MAP activity.  Previously,
these distributions were netted against minority interest in income of MAP
within the operating activity section of the Statement of Cash Flows.

Derivative Instruments
- ----------------------
     See Quantitative and Qualitative Disclosure About Market Risk for
discussion of derivative instruments and associated market risk for the Marathon
Group.

Liquidity
- ---------
     For discussion of USX's liquidity and capital resources, see Management's
Discussion and Analysis of USX Consolidated Financial Condition, Cash Flows and
Liquidity.
<PAGE> 53

                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

Environmental Matters, Contingencies and Commitments
- ----------------------------------------------------
     The Marathon Group has incurred and will continue to incur substantial
capital, operating and maintenance, and remediation expenditures as a result of
environmental laws and regulations.  To the extent these expenditures, as with
all costs, are not ultimately reflected in the prices of the Marathon Group's
products and services, operating results will be adversely affected.  The
Marathon Group believes that substantially all of its competitors are subject to
similar environmental laws and regulations.  However, the specific impact on
each competitor may vary depending on a number of factors, including the age and
location of its operating facilities, marketing areas, production processes and
whether or not it is engaged in the petrochemical business, power business or
the marine transportation of crude oil and refined products.

     USX has been notified that it is a potentially responsible party ("PRP") at
15 waste sites related to the Marathon Group under the Comprehensive
Environmental Response, Compensation and Liability Act ("CERCLA") as of
September 30, 1999.  In addition, there are 8 sites related to the Marathon
Group where USX has received information requests or other indications that USX
may be a PRP under CERCLA but where sufficient information is not presently
available to confirm the existence of liability.

     There are also 108 additional sites, excluding retail marketing outlets,
related to the Marathon Group where remediation is being sought under other
environmental statutes, both federal and state, or where private parties are
seeking remediation through discussions or litigation.  Of these sites, 17 were
associated with properties conveyed to MAP by Ashland for which Ashland has
retained liability for all costs associated with remediation.

     At many sites, USX is one of a number of parties involved and the total
cost of remediation, as well as USX's share thereof, is frequently dependent
upon the outcome of investigations and remedial studies.  The Marathon Group
accrues for environmental remediation activities when the responsibility to
remediate is probable and the amount of associated costs is reasonably
determinable.  As environmental remediation matters proceed toward ultimate
resolution or as
additional remediation obligations arise, charges in excess of those previously
accrued may be required.
<PAGE> 54

                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     In October 1998, the National Enforcement Investigations Center and Region
V of the United States Environmental Protection Agency  ("EPA") conducted a
multi-media inspection of MAP's Detroit refinery.  Subsequently, in November
1998, Region V conducted a multi-media inspection of MAP's Robinson refinery.
These inspections covered compliance with the Clean Air Act (New Source
Performance Standards, Prevention of Significant Deterioration, and the National
Emission Standards for
Hazardous Air Pollutants for Benzene), the Clean Water Act (Permit exceedances
for the Waste Water Treatment Plant), reporting obligations under the Emergency
Planning and Community Right to Know Act and the handling of process waste.
Although MAP has been advised as to certain compliance issues regarding MAP's
Detroit refinery, it is not known when complete findings on the results of the
inspections will be issued.  Thus far, MAP has been served with two Notices of
Violation ("NOV") and three Findings of Violation in connection with the multi-
media inspection at its Detroit refinery.  MAP can contest the factual and the
legal basis for the allegations prior to the EPA taking enforcement action.  At
this time, it is not known when complete findings on the results of these multi-
media inspections will be issued.

     USX is the subject of, or a party to, a number of pending or threatened
legal actions, contingencies and commitments relating to the Marathon Group
involving a variety of matters, including laws and regulations relating to the
environment.  See Note 11 to the Marathon Group Financial Statements for a
discussion of certain of these matters.  The ultimate resolution of these
contingencies could, individually or in the aggregate, be material to the
Marathon Group Financial Statements.  However, management believes that USX will
remain a viable and competitive enterprise even though it is possible that these
contingencies could be resolved unfavorably to the Marathon Group.  See
discussion of Liquidity in USX Consolidated Management's Discussion and Analysis
of Financial Condition and Results of Operations.

Outlook
- -------
     The outlook regarding the Marathon Group's upstream revenues and income is
largely dependent upon future prices and volumes of liquid hydrocarbons and
natural gas.  Prices have historically been volatile and have frequently been
affected by unpredictable changes in supply and demand resulting from
fluctuations in worldwide economic activity and political developments in the
world's major oil and gas producing and consuming areas.  Any significant
decline in prices could have a material adverse effect on the Marathon Group's
results of operations.  A prolonged decline in such prices could also adversely
affect the quantity of crude oil and natural gas reserves that can be
economically produced and the amount of capital available for exploration and
development.

<PAGE> 55

                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     On October 1, 1999, Marathon announced the start of gas production from the
Southwest Kinsale field, located approximately 30 miles south of Cork, Ireland,
at an initial rate in excess of 50 million cubic feet per day ("mmcfpd").
Marathon has a 100 percent working interest in this field.

     On September 29, 1999, Marathon sold its interests in two fields in Egypt.
The transaction included a 50 percent interest in the Ashrafi oilfield offshore
in the southwest Gulf of Suez and a 25 percent interest in the El Qar'a natural
gas and condensate field in the Nile Delta.  Marathon's second quarter 1999 net
production was about 6,000 bpd from the two fields.

     On September 19, 1999, production commenced from the Angus field, a three-
well subsea development on Green Canyon Blocks 112 and 113 in the Gulf of
Mexico.  Current gross production is 30,000 bpd and 45 mmcfpd.  Marathon holds a
33.34 percent interest in this project.

     On September 7, 1999, Marathon announced the start of production from the
Tchatamba South field in the Kowe permit located 20 miles offshore Gabon.  The
Tchatamba South field is currently producing 18,000 gross bpd of 44-degree oil
from two wells in 150 feet of water.  Production from Tchatamba South and
Tchatamba Marin fields is currently 32,000 gross bpd.  Marathon has a 56.25
percent working interest in this development.

     On July 5, 1999, Sakhalin Energy Investment Company, Ltd. ("Sakhalin
Energy") initiated oil production from the Astokh Feature of the Piltun-
Astokhskoye field offshore Sakhalin Island in the Russian Far East.  The first
lifting occurred on September 20, 1999.  In late September, production was shut-
in following a failure of the mooring system, and although re-started briefly in
late October, remains shut-in pending correction of the problem.  A re-designed
mooring system has been installed and production is expected to resume in mid-
November and continue through the ice-free season, estimated to be mid-December.
In 2000, gross production is expected to average 36,000 gross bpd (on an
annualized basis), although operations will be limited to the ice-free season.
Marathon holds a 37.5 percent interest in Sakhalin Energy, which is the first
enterprise to develop and produce oil and gas resources in Russia under a
production sharing agreement.

     Marathon's fourth quarter 1999 worldwide liquid hydrocarbon production is
expected to average in the range of 220,000 to 225,000 barrels per day ("bpd")
and worldwide natural gas production is expected to be approximately 1.37
billion cubic feet per day ("bcfpd").  Based on these fourth quarter
projections, average production for the full year 1999 is expected to be nearly
210,000 bpd and 1.31 bcfpd.

     Liquid hydrocarbon production in 2000 is expected to average in the range
of 215,000 to 225,000 bpd and in 2001, between 230,000 to 240,000 bpd.  Natural
gas volumes in 2000 are expected to remain consistent with 1999 and increase
approximately four percent in 2001.  These projections are based on known
discoveries and do not include the impact of future acquisitions, dispositions,
or wildcat drilling.
<PAGE> 56

                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     On August 18, 1999, Marathon announced a successful appraisal well was
drilled in licenses PL 2/93 and 3/94, which encompass the Corrib field, located
44 miles off the west coast of Ireland.  The well, which was drilled in 1,145
feet of water, achieved test rates up to 64 gross mmcfpd.  Development planning
is now underway.  Marathon owns an 18.5 percent working interest in the
licenses.

     On the same day, Marathon also announced a second discovery well was
drilled on the Q4 Block in the Dutch sector of the North Sea.  The well tested
at 26 to 28 gross mmcfpd in two separate zones.  Marathon indirectly holds a
16.5 percent equity interest in this block through Clam Petroleum B.V., a 50/50
joint venture.

     On August 12, 1999, Marathon announced a deepwater natural gas discovery on
the Camden Hills prospect, located in the Gulf of Mexico on Mississippi Canyon
Block 348.  The well was drilled to a depth of 15,080 feet and encountered over
200 feet of gas pay.  Marathon is the operator and has a 50.03 percent working
interest.  Further appraisal drilling is planned later this year to evaluate the
full extent of this discovery.

     The above discussion includes forward-looking statements with respect to
projected liquid hydrocarbon production levels and natural gas volumes for 1999,
2000 and 2001.  These statements are based on a number of assumptions, including
(among others) prices, amount of capital available for exploration and
development, worldwide supply and demand for petroleum products, regulatory
constraints, reserve estimates, production decline rates of mature fields,
timing of commencing production from new wells, timing and results of future
development drilling, reserve replacement rates, and other geological, operating
and economic considerations.  In addition, development of new production
properties in countries outside the United States may require protracted
negotiations with host governments and is frequently subject to political
considerations, such as tax regulations, which could adversely affect the
economics of projects.  To the extent these assumptions prove inaccurate and/or
negotiations and other considerations are not satisfactorily resolved, actual
results could be materially different than present expectations.
<PAGE> 57

                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     Downstream income of the Marathon Group is largely dependent upon refined
product margins, which reflect the difference between the selling prices of
refined products and the cost of raw materials refined and manufacturing costs.
Refined product margins have been historically volatile and vary with the level
of economic activity in the various marketing areas, the regulatory climate,
crude oil costs, manufacturing costs and the available supply of crude oil and
refined products.

     On May 24, 1999, MAP signed an agreement with Ultramar Diamond Shamrock
("UDS") to purchase 179 UDS owned-and-operated convenience stores, 5 product
terminals and an assignment of supply contracts for about 240 branded UDS jobber
stations in Michigan.  MAP, Wolverine Pipeline Company ("Wolverine") and UDS
received a second request for information from the Federal Trade Commission
("FTC") regarding the purchase by MAP and Wolverine of UDS' Michigan assets.
MAP has responded to the FTC and anticipates closing this transaction before the
end of the year.  This is a forward-looking statement.  Some factors that could
potentially affect the timing of the UDS closing include (among others) receipt
of government approvals, consents of third parties and satisfaction of customary
closing conditions.

     Speedway SuperAmerica LLC opened a travel center near Houston in Baytown,
Texas.  This travel center marks the completion of MAP's first retail facility
outside of its traditional market in the Midwest and Southeast.

     MAP has recently begun selling gasoline and diesel fuel under the Marathon
brand in Georgia and is in the process of branding a number of units in Florida.
MAP plans to develop a significant brand presence in these high growth states
where it already has the logistical assets in place to support these jobber
owned retail outlets.

     On June 1, 1999, Marathon announced it had signed a definitive agreement to
sell Carnegie Natural Gas Company and affiliated subsidiaries ("Carnegie") to
Equitable Resources, Inc.  The transaction is expected to close later this year.
Carnegie is engaged in natural gas production, transmission, distribution, sales
and storage activities in Pennsylvania and West Virginia.  This is a forward-
looking statement.  Some factors that could potentially affect the timing of the
Carnegie closing include (among others) receipt of government approvals,
consents of third parties and satisfaction of customary closing conditions.
Carnegie is reported as part of the other energy related businesses operating
segment.

     On August 3, 1999, Marathon announced a voluntary enhanced retirement
program, which resulted in the early fourth quarter retirement of approximately
260 employees, or about 8% of the Marathon Oil Company workforce.  Annual pre-
tax cost savings as a result of this program are estimated to be approximately
$18 million.

<PAGE> 58

                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

Year 2000 Readiness Disclosure
- ------------------------------
The Marathon Group has executed Year 2000 action plans which include:

- -    prioritizing and focusing on those computerized and automated systems and
  processes ("systems") critical to the Marathon Group's operations in terms of
  material operational, safety, environmental and financial risk to the company.
- -    allocating and committing appropriate resources to fix the problem.
- -    developing detailed contingency plans for those systems critical to the
  operations in terms of material operational, safety, environmental and
  financial risk to the company.
- -    communicating with, and aggressively pursuing, critical third parties to
  help ensure the Year 2000 readiness of their products and services through use
  of mailings, telephone contacts, and the inclusion of Year 2000 readiness
  language in purchase orders and contracts.
- -    performing rigorous Year 2000 tests of critical systems.
- -    participating in, and exchanging Year 2000 information with industry trade
  associations, such as the American Petroleum Institute ("API").
- -    engaging qualified outside engineering and information technology
  consulting firms to assist in the Year 2000 inventory, assessment and
  readiness.

State of Readiness

     Both Information Technology ("IT") and Non-IT systems are 99.9% ready as of
September 30, 1999.  Systems, which are not yet Year 2000 ready are expected to
be completed in the fourth quarter.  These include vendor-supplied software and
replacement components awaiting delivery of Year 2000 ready versions and
implementations deferred to coincide with operational shutdowns.  These
remaining items are being monitored closely.  Specific contingency plans have
been prepared which will provide a means to minimize any adverse impact on
business operations after December 31, 1999, if remediation is not completed as
expected.

     Additional review and approval is being required for any modifications to
IT and Non-IT systems during the fourth quarter in order to avoid introducing
problems to systems already determined to be Year 2000 ready.  Continued system
testing is being done to help further mitigate the risks of the Year 2000.

     The following chart provides the percent of completion for the (i)
inventory of systems and processes that may be affected by the Year 2000 ("Y2K
Inventory"), (ii) analysis performed to determine the Year 2000 date impact of
inventoried systems and processes ("Y2K Impact Assessment") and (iii) overall
Year 2000 readiness of the Marathon Group's Year 2000 inventory ("Y2K Readiness
of Overall Inventory").
<PAGE> 59
<TABLE>
<CAPTION>
                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

                                                 Percent Completed

                                                                 Y2K
                                                         Y2K  Readiness
As of September 30, 1999                                Impact    of
                                                 Y2K   Assess- Overall
                                              Inventory  ment Inventory
                                                ------  ------  ------
<S>                                               <C>     <C>    <C>
Information Technology                            100%    100%   99.9%
Non-Information Technology                        100%    100%   99.9%
</TABLE>

Third Parties

     Third parties include suppliers, customers and vendors.  The Marathon Group
has been actively identifying critical vendors and utilities needed for
continued operations, cash flow, and safety.  Contacts were made with critical
third parties to determine if they will be able to provide their services to the
Marathon Group in the Year 2000.  The responses were graded and unsatisfactory
responses were addressed through contingency planning, and in some cases,
selection of new vendors who appeared to be better prepared for the Year 2000.

     Using a Year 2000 ready test environment, testing is complete on third
party software to validate that it is Year 2000 ready, with the exceptions noted
under State of Readiness above.  In addition, contingency plans have been
prepared for third party software that is critical to operations.

The Costs to Address Year 2000 Issues

     Total costs incurred as of September 30, 1999, were $30 million, including
$14 million of incremental costs.  The total estimated costs associated with
Year 2000 readiness are expected to be $36 million, of which $18 million are
incremental costs.

<PAGE> 60

                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

The Risks of the Company's Year 2000 Issues

     The most reasonably likely worst case Year 2000 scenario would be the
inability of critical third party suppliers, such as utility providers,
telecommunication companies, drilling equipment suppliers, platform suppliers,
crude oil suppliers and pipeline carriers, to continue providing their products
and services.  This could pose the greatest material operational, safety,
environmental and/or financial risk to the company.  These critical third party
suppliers have generally indicated that they are or expect to be Year 2000 ready
in a timely manner.

     The Marathon Group has relied on information from suppliers of automation
and process control systems and processes, as well as the tests conducted on
critical components, to determine the readiness of embedded chips.  There is a
risk some Year 2000 problems could go undetected until after January 1, 2000.
According to information received from the suppliers of these systems, oil and
gas industry surveys and the Marathon Group's own test results, these embedded
systems do not appear to pose significant problems or involve the possibility of
major failures that could affect vital operations.

     An additional risk is the ability of some third party software vendors to
provide timely software upgrades to make their product Year 2000 ready.
Communication continues with these vendors to expedite the completion of
upgrades as much as possible.  Contingency plans have been developed in case
timely upgrades are not available.

     In a report issued February 24, 1999 by the United States Senate Special
Committee on the Year 2000 Technology Problem, the committee expressed concern
that many of the countries from which the United States imports oil are
significantly behind the United States in their Year 2000 remediation efforts,
and oil production and transportation could be at some risk.  The committee's
follow-up report dated September 22, 1999, continued to express concern that
many of the countries which export oil to the United States have a high risk of
Year 2000 disruption.

     However, the Central Intelligence Agency ("CIA") has subsequently provided
additional information as to the risk to oil imports.  In prepared testimony to
the U.S. House International Relations Committee on October 21, 1999, the CIA
stated, "Finally, the United States is unlikely to experience a significant
disruption in oil deliveries because our key suppliers appear to be ready.
Major multi-national firms have been in the forefront of remediation and testing
efforts, and operators of oil terminals and tankers have been similarly active
in correcting Y2K vulnerabilities."
<PAGE> 61

                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     Furthermore, according to a report by the API and an August 1999 report by
the United States Department of Energy, several of the largest exporters of
petroleum to the United States expect all critical systems to be Year 2000
ready by the end of 1999.  If any country is unable to export oil, other
countries may be able to increase production and exports.

     According to the API report, in any event, import deliveries of oil would
not stop immediately as there is always crude oil en route to the United States.
In addition, the United States government has a Strategic Petroleum Reserve to
act as a buffer to protect against temporary interruptions in foreign oil
supplies.  An API survey conducted in September 1999, covering 96% of domestic
oil and gas consumption, showed more than 90% being Year 2000 ready as of
September 30, 1999.  The remaining companies said they will be ready before
year's end.

     In the first nine months of 1999, 62% or 565,000 bpd of the crude oil
processed by MAP's refineries was from foreign sources and acquired primarily
from various foreign national oil companies, producing companies and traders.
Of this total, approximately 326,000 bpd was acquired from the Middle East.  If
any suppliers of foreign crude oil experience problems associated with the Year
2000, the Marathon Group could be adversely affected by a disruption in supply
if alternate sources of supply are not available.

     In the initial review of assets to be acquired from UDS, Marathon
determined that certain facilities and systems might not be completely Year 2000
ready.  Marathon has inventoried and assessed these assets and is prepared to
proceed promptly with the necessary remediation once the closing occurs.
Marathon currently anticipates closing this transaction before the end of the
year.  There is a risk some of the facilities may not be Year 2000 ready by the
end of the year.  The completion percentages in the chart on page 59 do not
include UDS IT and Non-IT systems.

Contingency Planning

     Detailed contingency plans have been developed throughout the company, with
one percent remaining to be completed.  In July, a multiple-occurrence emergency
response drill was conducted that included Year 2000 scenarios.  This drill
helped identify specific improvements that could be made to the contingency
plans and year-end rollover monitoring processes. Except for the implementation
and training of personnel, which is scheduled in the fourth quarter, contingency
planning is complete.

     The Marathon Group plans to quickly detect and correct problems that may
arise during the actual rollover to the new century.  Year 2000 monitoring
centers have been established in major offices to collect and disseminate
information within the Marathon Group as well as with the Year 2000 monitoring
centers at U.S. Steel and the API.  Personnel will be located at each of the
company's critical operating facilities throughout the world to report successes
and problems through these monitoring centers.  The information from these
worldwide locations could give an early warning to correct similar problems in
other locations not yet affected.
<PAGE> 62

                        MARATHON GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                  ---------------------------------------------

     Similar to the drill conducted in July, another Year 2000 drill took place
in late October 1999.  This drill focused on the business units and how they
collect and disseminate Year 2000 information internally and with the
centralized Year 2000 monitoring center.  No significant issues were identified.

     This discussion includes forward-looking statements of the Marathon Group's
efforts and management's expectations and costs relating to Year 2000 readiness.
The Marathon Group's ability to achieve Year 2000 readiness and the level of
incremental costs associated therewith, could be adversely impacted by, among
other things, contingency plan resources, vendors' ability to install or modify
proprietary hardware and software and unanticipated problems identified in the
ongoing Year 2000 readiness review.  Also, the Marathon Group's ability to
mitigate Year 2000 risks could be adversely impacted by the effectiveness of
contingency plans.

Accounting Standard
- --------------------
     In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards  ("SFAS") No. 133, "Accounting for Derivative
Instruments and Hedging Activities".  This new standard requires recognition of
all derivatives as either assets or liabilities at fair value.  This new
standard may result in additional volatility in both current period earnings and
other comprehensive income as a result of recording recognized and unrecognized
gains and losses resulting from changes in the fair value of derivative
instruments.  At adoption this new standard requires a comprehensive review of
all outstanding derivative instruments to determine whether or not their use
meets the hedge accounting criteria.  Upon adoption, there may be derivative
instruments employed by USX that do not meet all of the designated hedge
criteria.  These instruments will be reflected in income on a mark-to-market
basis.  Based upon the strategies currently used by USX and the level of
activity related to forward exchange contracts and commodity-based derivative
instruments in recent periods, USX does not anticipate the effect of adoption to
have a material impact on either financial position or results of operations of
the Marathon Group.  The effective date of SFAS No. 133 was amended by SFAS No.
137.  USX plans to adopt the standard effective January 1, 2001, as required.

<PAGE> 63

                        MARATHON GROUP OF USX CORPORATION
                          QUANTITATIVE AND QUALITATIVE
                          DISCLOSURES ABOUT MARKET RISK
                    -----------------------------------------
Management Opinion Concerning Derivative Instruments
- ----------------------------------------------------

USX utilizes derivative instruments principally in hedging activities, whereby
gains and losses are generally offset by price changes in the underlying
commodity.  In 1999, the Marathon Group's risk management policy was expanded to
include the use of derivative instruments for certain non-hedging and trading
activities.  These instruments will be marked-to-market each period and the
related income or loss will be included in income from operations.  Management
believes that use of derivative instruments along with risk assessment
procedures and internal controls does not expose the Marathon Group to material
risk.  The use of derivative instruments could materially affect the Marathon
Group's results of operations in particular quarterly or annual periods.
However, management believes that use of derivative instruments will not have a
material adverse effect on financial position or liquidity.

Commodity Price Risk and Related Risks
- --------------------------------------
     Sensitivity analysis of the incremental effects on pretax income of
hypothetical 10% and 25% changes in commodity prices for open derivative
commodity instruments as of September 30, 1999 are provided in the following
table:
<TABLE>
<CAPTION>
                                                      Incremental Decrease
                                                        in Pretax Income
                                                    Assuming a Hypothetical
                                                      Price Change of (a):
(Dollars in millions)                                  10%          25%
- --------------------------------------------------------------------------------
<S>                                                   <C>         <C>
Derivative Commodity Instruments
Marathon Group (b) (c)
    Crude oil (price increase) (d)                      $6.8        $22.4
    Natural gas (price decrease) (d)                     2.4         10.2
    Refined products (price decrease) (d)                 .9          3.0
<FN>
      (a)  Gains and losses on derivative commodity instruments are generally
      offset by price changes in the underlying commodity.  Effects of these
      offsets are not reflected in the sensitivity analyses.  Amounts reflect
      the estimated incremental effect on pretax income of hypothetical 10% and
      25% changes in closing commodity prices for each open contract position
      at September 30, 1999. Marathon Group management evaluates its portfolio
      of derivative commodity instruments on an ongoing basis and adds or
      revises strategies to reflect anticipated market conditions and changes
      in risk profiles.  Changes to the portfolio subsequent to September 30,
      1999 would cause future pretax income effects to differ from those
      presented in the table.
      (b)  The number of net open contracts varied throughout third quarter
      1999 from a low of 107 contracts at July 14, 1999, to a high of 16,688
      contracts at September 15, 1999, and averaged 8,756 for the quarter.  The
      derivative commodity instruments used and hedging positions taken also
      varied throughout third quarter 1999, and will continue to vary in the
      future.  Because of these variations in the composition of the portfolio
      over time, the number of open contracts, by itself, cannot be used to
      predict future income effects.
      (c)  The calculation of sensitivity amounts for basis swaps assumes that
      the physical and paper indices are perfectly correlated.  Gains and
      losses on options are based on changes in intrinsic value only.

<PAGE> 64

                        MARATHON GROUP OF USX CORPORATION
                          QUANTITATIVE AND QUALITATIVE
                          DISCLOSURES ABOUT MARKET RISK
                    -----------------------------------------

      (d)  The direction of the price change used in calculating the
      sensitivity amount for each commodity reflects that which would result in
      the largest incremental decrease in pretax income when applied to the
      derivative commodity instruments used to hedge that commodity.
</TABLE>
Interest Rate Risk
- ------------------
     As of September 30, 1999, the discussion of the Marathon Group's interest
rate risk has not changed materially from that presented in Quantitative and
Qualitative Disclosures About Market Risk included in USX's 1998 Form 10-K.

Foreign Currency Exchange Rate Risk
- -----------------------------------
     USX is subject to the risk of price fluctuations related to anticipated
revenues and operating costs, firm commitments for capital expenditures and
existing assets or liabilities denominated in currencies other than U.S.
dollars.  USX has not generally used derivative instruments to manage this risk.
However, USX has made limited use of forward currency contracts to manage
exposure to certain currency price fluctuations.  At September 30, 1999, USX had
open Canadian dollar forward purchase contracts with a total carrying value of
$18 million.  A 10% increase in the September 30, 1999, Canadian dollar to U.S.
dollar forward rate would result in a charge to income of $2 million.  The
entire amount of these contracts is attributed to the Marathon Group.

Equity Price Risk
- -----------------

     As of September 30, 1999, the Marathon Group had no material exposure to
equity price risk.

Safe Harbor
- -----------
     The Marathon Group's quantitative and qualitative disclosures about market
risk include forward-looking statements with respect to management's opinion
about risks associated with the Marathon Group's use of derivative instruments.
These statements are based on certain assumptions with respect to market prices
and industry supply and demand for crude oil, natural gas and refined products.
To the extent that these assumptions prove to be inaccurate, future outcomes
with respect to the Marathon Group's hedging programs may differ materially from
those discussed in the forward-looking statements.
PAGE> 65
<TABLE>
<CAPTION>
                        MARATHON GROUP OF USX CORPORATION
                       SUPPLEMENTAL STATISTICS (Unaudited)
                 -----------------------------------------------

                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions)                            1999    1998    1999     1998
- --------------------------------------------------------------------------------
<S>                                               <C>     <C>   <C>      <C>
INCOME (LOSS) FROM OPERATIONS
 Exploration & Production ("E&P")
   Domestic                                       $168     $44    $299     $159
   International                                    33      16      62       98
                                                 -----   -----   -----    -----
     Income For E&P Reportable Segment             201      60     361      257
 Refining, Marketing & Transportation              236     224     509      749
 Other Energy Related Businesses (a)                13       6      47       23
                                                 -----   -----   -----    -----
       Income For Reportable Segments             $450    $290    $917   $1,029

Items Not Allocated To Segments:
 Administrative Expenses                          $(26)   $(25)   $(83)    $(84)
 Inventory Market Val. Res. Adjustment             136     (50)    551      (22)
 Loss on Disposal of Assets                        (10)      -     (33)       -
 Gain on Ownership Change & Trans. Charges - MAP    11       -       11     223
E&P Int'l Impairment & Dom. Contract Settlement      -       -       -      (76)
                                                 -----   -----   -----    -----
     Marathon Group Income From Operations        $561    $215  $1,363   $1,070

CAPITAL EXPENDITURES
 Exploration & Production                         $184    $183    $594     $606
 Refining, Marketing & Transportation              107      89     226      208
 Other (b)                                           4      13       7       21
                                                 -----   -----   -----    -----
     Total                                        $295    $285    $827     $835

EXPLORATION EXPENSE
 Domestic                                          $26     $31     $92     $123
 International (c)                                  14      15      70       80
                                                 -----   -----   -----    -----
     Total                                         $40     $46    $162     $203

INVESTMENTS & OTHER AFFILIATE ACTIVITY-NET         $49     $49    $105      $52

OPERATING STATISTICS

Net Liquid Hydrocarbon Production (d):
     United States                               138.6   137.2   143.4    133.7
     Europe                                       28.7    44.0    32.3     43.3
     Other International                          24.4    27.9    28.4     15.9
                                                 -----   -----   -----    -----
       Total Consolidated                        191.7   209.1   204.1    192.9
     Equity Affiliates (CLAM & Sakhalin Energy)    2.4     0.1     0.9        -
                                                 -----   -----   -----    -----
       Worldwide                                 194.1   209.2   205.0    192.9

Net Natural Gas Production (e):
     United States                               730.9   728.8   747.2    733.4
     Europe (f)                                  291.1   326.6   345.5    393.9
     Other International                         149.1   102.8   169.7     43.1
                                                 -----   -----   -----    -----
       Total Consolidated                       1171.1  1158.2  1262.4   1170.4
     Equity Affiliate (CLAM)                      25.1    23.2    32.0     34.0
                                                ------  ------  ------   ------
       Worldwide                                1196.2  1181.4  1294.4   1204.4
Average Equity Sales Prices (g) (h):
   Liquid Hydrocarbons (per Bbl)
     Domestic                                   $17.78  $10.23  $13.48   $10.72
     International                               19.56   11.66   14.80    12.59
   Natural Gas (per Mcf)
     Domestic                                    $2.22   $1.68   $1.83    $1.82
     International                                1.80    1.90    1.81     2.04

Crude Oil Refined (d)                            940.4   885.5   909.5    904.6
Refined Products Sold (d)                       1301.4  1228.6  1227.9   1183.7
Matching buy/sell volumes included in refined
  products sold (d)                               55.8    35.6    50.0     38.4
MAP Merchandise Sales                             $561    $510  $1,545   $1,386
- --------------
<FN>
      (a)  Includes domestic natural gas and crude oil marketing and
      transportation, and power generation.
      (b)  Includes other energy related businesses and corporate capital
      expenditures.
      (c)  Nine months ended September 30, 1998 includes $30 million of
      impairment in first quarter 1998.
      (d)  Thousands of barrels per day
      (e)  Millions of cubic feet per day
      (f)  Includes gas acquired for injection and subsequent resale of 16.0,
      17.2, 20.8 and 23.7 mmcfd in the third quarters and first nine months of
      1999 and 1998, respectively.
      (g)  Prices exclude gains and losses from hedging activities.
      (h)  Prices exclude equity affiliates and purchase/resale gas.
</TABLE>
<PAGE> 66

Part I - Financial Information (Continued):
<TABLE>
<CAPTION>
     C.    U. S. Steel Group

                      U. S. STEEL GROUP OF USX CORPORATION
                       STATEMENT OF OPERATIONS (Unaudited)
                      ------------------------------------
                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions, except per share amounts)  1999    1998    1999     1998
- --------------------------------------------------------------------------------
<S>                                             <C>     <C>     <C>      <C>
REVENUES:
 Sales                                          $1,377  $1,483  $3,926   $4,842
 Income (loss) from affiliates                     (56)      3     (89)      46
 Gain on disposal of assets                         11      11       9       39
 Other income (loss)                                 2       -       3       (1)
                                                ------  ------  ------   ------
   Total revenues                                1,334   1,497   3,849    4,926
                                                ------  ------  ------   ------
COSTS AND EXPENSES:
 Cost of sales (excludes items shown below)      1,289   1,312   3,606    4,203
 Selling, general and administrative
  expenses (credits)                               (61)    (51)   (226)    (150)
 Depreciation, depletion and amortization           78      71     228      220
 Taxes other than income taxes                      57      60     169      169
                                                ------  ------  ------   ------
   Total costs and expenses                      1,363   1,392   3,777    4,442
                                                ------  ------  ------   ------
INCOME (LOSS) FROM OPERATIONS                      (29)    105      72      484
Net interest and other financial costs              20      10      48       60
                                                ------  ------  ------   ------
INCOME (LOSS) BEFORE INCOME TAXES AND
 EXTRAORDINARY LOSS                                (49)     95      24      424
Provision (credit) for estimated income taxes      (18)     30       9      136
                                                ------  ------  ------   ------
INCOME (LOSS) BEFORE EXTRAORDINARY LOSS            (31)     65      15      288
Extraordinary loss on extinguishment of debt,
 net of income tax                                   -       -       5        -
                                                ------  ------  ------   ------
NET INCOME (LOSS)                                  (31)     65      10      288
Dividends on preferred stock                         2       2       7        7
                                                ------  ------  ------   ------
NET INCOME (LOSS) APPLICABLE TO STEEL STOCK       $(33)    $63      $3     $281
                                                ======  ======  ======   ======
STEEL STOCK DATA:
 Income (loss) before extraordinary loss          $(33)    $63      $8     $281
   - Per share - basic                            (.37)    .72     .10     3.22
            - diluted                             (.37)    .71     .10     3.11
 Extraordinary loss, net of income tax               -       -       5        -
   - Per share - basic and diluted                   -       -     .06        -
 Net income (loss)                                $(33)    $63      $3     $281
   - Per share - basic                            (.37)    .72     .04     3.22
            - diluted                             (.37)    .71     .04     3.11

 Dividends paid per share                          .25     .25     .75      .75

 Weighted average shares, in thousands
   - Basic                                      88,394  88,099  88,383   87,223
   - Diluted                                    88,394  92,359  88,385   94,717

<FN>
Selected notes to financial statements appear on pages 69-75.
</TABLE>
<PAGE> 67
<TABLE>
<CAPTION>
                      U. S. STEEL GROUP OF USX CORPORATION
                            BALANCE SHEET (Unaudited)
                      ------------------------------------

                                                   September 30 December 31
(Dollars in millions)                                  1999         1998
- --------------------------------------------------------------------------------
<S>                                                   <C>           <C>
ASSETS

Current assets:
  Cash and cash equivalents                               $6            $9
  Receivables, less allowance for doubtful
   accounts of $6 and $9                                 532           392
  Inventories                                            719           698
  Deferred income tax benefits                           180           176
                                                      ------        ------
     Total current assets                              1,437         1,275

Investments and long-term receivables,
 less reserves of $3 and $10                             606           743
Property, plant and equipment, less accumulated
 depreciation, depletion and amortization of
 $6,105 and $5,939                                     2,491         2,500
Prepaid pensions                                       2,371         2,172
Other noncurrent assets                                   55            59
                                                       -----        ------
     Total assets                                     $6,960        $6,749
                                                      ======        ======
LIABILITIES

Current liabilities:
  Notes payable                                          $10           $13
  Accounts payable                                       694           501
  Payroll and benefits payable                           286           330
  Accrued taxes                                          155           150
  Accrued interest                                         8            10
  Long-term debt due within one year                      13            12
                                                      ------        ------
     Total current liabilities                         1,166         1,016

Long-term debt, less unamortized discount                543           464
Long-term deferred income taxes                          199           129
Employee benefits                                      2,313         2,315
Deferred credits and other liabilities                   461           484
Preferred stock of subsidiary                             66            66
USX obligated mandatorily redeemable convertible preferred
 securities of a subsidiary trust holding solely junior
 subordinated convertible debentures of USX              182           182

STOCKHOLDERS' EQUITY
Preferred stock                                            3             3
Common stockholders' equity                            2,027         2,090
                                                      ------        ------
     Total stockholders' equity                        2,030         2,093
                                                      ------        ------
     Total liabilities and stockholders' equity       $6,960        $6,749
                                                      ======        ======

<FN>
Selected notes to financial statements appear on pages 69-75.
</TABLE>
<PAGE> 68
<TABLE>
<CAPTION>
                      U. S. STEEL GROUP OF USX CORPORATION
                       STATEMENT OF CASH FLOWS (Unaudited)
                      ------------------------------------
                                                       Nine Months Ended
                                                          September 30
(Dollars in millions)                                  1999         1998
- --------------------------------------------------------------------------------
<S>                                                      <C>           <C>
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS

OPERATING ACTIVITIES:
Net income                                               $10          $288
Adjustments to reconcile to net cash provided
 from operating activities:
  Extraordinary loss                                       5             -
  Depreciation, depletion and amortization               228           220
  Pensions and other postretirement benefits            (197)         (175)
  Deferred income taxes                                   72           109
  Gain on disposal of assets                              (9)          (39)
  Changes in:
     Current receivables   - sold                         30             -
                           - operating turnover         (208)          148
Inventories                                              (21)          (71)
     Current accounts payable and accrued expenses       170          (132)
  All other - net                                         78           (55)
                                                      ------        ------
     Net cash provided from operating activities         158           293
                                                      ------        ------
INVESTING ACTIVITIES:
Capital expenditures                                    (221)         (228)
Disposal of assets                                         6            17
Restricted cash -withdrawals                              15             3
             - deposits                                  (14)          (19)
Affiliates - investments - net                           (15)          (66)
All other - net                                            6            13
                                                      ------        ------
     Net cash used in investing activities              (223)         (280)
                                                      ------        ------
FINANCING ACTIVITIES:
Increase in U. S. Steel Group's portion of USX
 consolidated debt                                       146            21
Specifically attributed debt repayments                  (11)           (3)
Steel Stock issued                                         -            55
Preferred stock repurchased                                -            (8)
Dividends paid                                           (73)          (73)
                                                      ------        ------
Net cash provided from (used in) financing activities     62            (8)
                                                      ------        ------
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS      (3)            5
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR             9            18
                                                      ------        ------
CASH AND CASH EQUIVALENTS AT END OF PERIOD                $6           $23
                                                      ======        ======
Cash used in operating activities included:
  Interest and other financial costs paid (net of
   amount capitalized)                                  $(63)         $(61)
  Income taxes paid, including settlements with
   the Marathon Group                                     (5)          (32)

<FN>
Selected notes to financial statements appear on pages 69-75.
</TABLE>
<PAGE> 69

                      U. S. STEEL GROUP OF USX CORPORATION
                     SELECTED NOTES TO FINANCIAL STATEMENTS
                     --------------------------------------
                                   (Unaudited)


     1.   The information furnished in these financial statements is unaudited
     but, in the opinion of management, reflects all adjustments necessary for a
     fair presentation of the results for the periods covered.  All such
     adjustments are of a normal recurring nature unless disclosed otherwise.
     These financial statements, including selected notes, have been prepared in
     accordance with the applicable rules of the Securities and Exchange
     Commission and do not include all of the information and disclosures
     required by generally accepted accounting principles for complete financial
     statements.  Certain reclassifications of prior year data have been made to
     conform to 1999 classifications.  Additional information is contained in
     the USX Annual Report on Form 10-K for the year ended December 31, 1998.

     2.   The financial statements of the U. S. Steel Group include the
     financial position, results of operations and cash flows for all businesses
     of USX other than the businesses, assets and liabilities included in the
     Marathon Group and a portion of the corporate assets and liabilities and
     related transactions which are not separately identified with ongoing
     operating units of USX.  These financial statements are prepared using the
     amounts included in the USX consolidated financial statements.  Corporate
     amounts reflected in these financial statements are determined based upon
     methods which management believes to be reasonable.  The accounting
     policies applicable to the preparation of the financial statements of the
     U. S. Steel Group may be modified or rescinded in the sole discretion of
     the Board of Directors of USX (Board), although the Board has no present
     intention to do so.  The Board may also adopt additional policies depending
     on the circumstances.

          Although the financial statements of the U. S. Steel Group and the
     Marathon Group separately report the assets, liabilities (including
     contingent liabilities) and stockholders' equity of USX attributed to each
     such Group, such attribution of assets, liabilities (including contingent
     liabilities) and stockholders' equity between the U. S. Steel Group and the
     Marathon Group for purposes of preparing their respective financial
     statements does not affect legal title to such assets and responsibility
     for such liabilities.  Holders of USX-U. S. Steel Group Common Stock (Steel
     Stock) and USX-Marathon Group Common Stock (Marathon Stock) are holders of
     common stock of USX and continue to be subject to all the risks associated
     with an investment in USX and all of its businesses and liabilities.
     Financial impacts arising from one Group that affect the overall cost of
     USX's capital could affect the results of operations and financial
     condition of the other Group.  In addition, net losses of either Group, as
     well as dividends or distributions on any class of USX Common Stock or
     series of Preferred Stock and repurchases of any class of USX Common Stock
     or series of Preferred Stock at prices in excess of par or stated value,
     will reduce the funds of USX legally available for payment of dividends on
     both classes of Common Stock.  Accordingly, the USX consolidated financial
     information should be read in connection with the U. S. Steel Group
     financial information.

          The financial statement provision for estimated income taxes and
     related tax payments or refunds have been reflected in the U. S. Steel
     Group and the Marathon Group financial statements in accordance with USX's
     tax allocation policy for such groups.  In general, such policy provides
     that the consolidated tax provision and related tax payments or refunds are
     allocated

<PAGE> 70

                      U. S. STEEL GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     2.   (Continued)

          between the U. S. Steel Group and the Marathon Group for group
     financial statement purposes, based principally upon the financial income,
     taxable income, credits, preferences and other amounts directly related to
     the respective groups.

          The provision for estimated income taxes for the U. S. Steel Group is
     based on tax rates and amounts which recognize management's best estimate
     of current and deferred tax assets and liabilities.  Differences between
     the combined interim tax provisions of the U. S. Steel and Marathon Groups
     and USX consolidated are allocated to each group based on the relationship
     of the individual group provisions to the combined interim provisions.

     3.   On August 13, 1999, USX and Kobe Steel, Ltd. (Kobe Steel) completed a
     transaction that combined the steelmaking and bar producing assets of
     USS/Kobe Steel Company (USS/Kobe) with companies controlled by Blackstone
     Capital Partners II-those companies being Republic Technologies
     International, Inc., Republic Engineered Steels, Inc. and Bar Technologies,
     Inc. (collectively Republic).  In addition, USX made a $15 million equity
     investment in Republic.  USX owned 50% of USS/Kobe and now owns
     approximately 16% of Republic.  USX will account for its investment in
     Republic under the equity method of accounting.

          The seamless pipe business of USS/Kobe was excluded from this
     transaction.  That business, now known as Lorain Tubular Company LLC, will
     continue to operate as a joint venture between USX and Kobe Steel.

          Third quarter 1999 income (loss) from affiliates includes $53 million
     in charges related to the impairment of the carrying value of USX's
     investment in USS/Kobe and costs related to the formation of Republic.

     4.The U. S. Steel Group's total comprehensive income (loss) for the third
     quarter of 1999 and 1998 was $(25) million and $64 million, respectively,
     and $8 million and $285 million for the nine months of 1999 and 1998,
     respectively.

     5.   The U. S. Steel Group consists of one operating segment, U. S. Steel.
     U. S. Steel is engaged in the production and sale of steel mill products,
     coke and taconite pellets.  U. S. Steel also engages in the following
     related business activities:  the management of mineral resources, domestic
     coal mining, engineering and consulting services, and real estate
     development and management.  The results of segment operations are as
     follows:

<PAGE> 71

                      U. S. STEEL GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     5.   (Continued)
<TABLE>
<CAPTION>
                                                      Third Quarter Ended
                                                          September 30
(In millions)                                          1999         1998
- --------------------------------------------------------------------------------
<S>                                                   <C>           <C>
Revenues:
  Customer                                            $1,376        $1,480
  Intergroup (a)                                           2             1
  Equity in earnings (losses) of unconsolidated
   affiliates                                             (3)            3
  Other                                                   12            13
                                                      ------        ------
     Total revenues                                   $1,387        $1,497
                                                      ======        ======
Segment income (loss)                                  $(51)           $41
                                                      ======        ======

</TABLE>
<TABLE>
<CAPTION>
                                                       Nine Months Ended
                                                          September 30
(In millions)                                          1999         1998
- --------------------------------------------------------------------------------
<S>                                                   <C>           <C>
Revenues:
  Customer                                            $3,913        $4,838
  Intergroup (a)                                          14             1
  Equity in earnings (losses) of unconsolidated
    affiliates                                           (36)           46
  Other                                                   33            41
                                                      ------        ------
     Total revenues                                   $3,924        $4,926
                                                      ======        ======
Segment income (loss)                                  $(119)         $301
                                                      ======        ======
<FN>
(a)  Intergroup sales and transfers were conducted on an arm's-length basis.
</TABLE>
<PAGE> 72

                      U. S. STEEL GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)

     5.   (Continued)

          The following schedules reconcile segment revenue and income (loss) to
     amounts reported in the U. S. Steel Group's financial statements:
<TABLE>
<CAPTION>
                                                      Third Quarter Ended
                                                          September 30
(In millions)                                          1999         1998
- --------------------------------------------------------------------------------
<S>                                                   <C>           <C>
Revenues:
  Revenues of reportable segment                      $1,387        $1,497
Items not allocated to segment - impairment of USS/Kobe
 investment and costs related to formation of Republic  (53)             -
                                                      ------        ------
     Total Group revenues                             $1,334        $1,497
                                                      ======        ======
Income:
  Income (loss) for reportable segment                  $(51)          $41
  Items not allocated to segment:
   Administrative expenses                                (4)           (6)
   Pension credits                                       100            94
   Costs related to former business activities           (21)          (24)
   Impairment of USS/Kobe investment and costs related
    to formation of Republic                             (53)            -
                                                      ------        ------
     Total Group income (loss) from operations          $(29)         $105
                                                      ======        ======
</TABLE>
<TABLE>
<CAPTION>
                                                       Nine Months Ended
                                                          September 30
(In millions)                                          1999         1998
- --------------------------------------------------------------------------------
<S>                                                   <C>           <C>
Revenues:
  Revenues of reportable segment                      $3,924        $4,926
  Items not allocated to segment:
   Impairment of USS/Kobe investment and costs related
     to formation of Republic                            (53)            -
   Loss on investment in RTI stock used to satisfy
    indexed debt obligations                             (22)            -
                                                      ------        ------
     Total Group revenues                             $3,849        $4,926
                                                      ======        ======
Income:
  Income (loss) for reportable segment                 $(119)         $301
  Items not allocated to segment:
   Administrative expenses                               (17)          (20)
   Pension credits                                       348           280
   Costs related to former business activities           (65)          (77)
   Impairment of USS/Kobe investment and costs related
    to formation of Republic                             (53)            -
   Loss on investment in RTI stock used to satisfy
    indexed debt obligations                             (22)            -
                                                      ------        ------
     Total Group income from operations                  $72          $484
                                                      ======        ======
</TABLE>
<PAGE> 73

                      U. S. STEEL GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     6.   The method of calculating net income (loss) per common share for the
     Steel Stock and Marathon Stock reflects the Board's intent that the
     separately reported earnings and surplus of the U. S. Steel Group and the
     Marathon Group, as determined consistent with the USX Restated Certificate
     of Incorporation, are available for payment of dividends on the respective
     classes of stock, although legally available funds and liquidation
     preferences of these classes of stock do not necessarily correspond with
     these amounts.

          Basic net income (loss) per share is calculated by adjusting net
     income (loss) for dividend requirements of preferred stock and is based on
     the weighted average number of common shares outstanding.

          Diluted net income (loss) per share assumes conversion of convertible
     securities for the applicable periods outstanding and assumes exercise of
     stock options, provided in each case, the effect is not antidilutive.

          See Note 9, of the Notes to USX Consolidated Financial Statements for
     the computation of income (loss) per share.

     7.   On March 31, 1999, USX irrevocably deposited with a trustee the entire
     5.5 million common shares it owned in RTI International Metals, Inc. (RTI).
     The deposit of the shares resulted in the satisfaction of USX's obligation
     under its 6-3/4% Exchangeable Notes (indexed debt) due February 1, 2000.
     Under the terms of the indenture, the trustee will exchange the RTI shares
     for the notes at maturity.  The notes are exchangeable for shares of RTI
     common stock on a variable basis up to one share per note depending on the
     market price of RTI common stock at maturity.  Ownership of any shares not
     required for satisfaction of the indexed debt will revert to USX.

          As a result of the above transaction, USX recorded in the first
     quarter of 1999 an extraordinary loss of $5 million, net of a $3 million
     income tax benefit, representing prepaid interest expense and the write-off
     of unamortized debt issue costs, and a pretax charge of $22 million,
     representing the difference between the carrying value of the investment in
     RTI and the carrying value of the indexed debt, which is included in gain
     on disposal of assets.  This transaction represents a noncash investing and
     financing activity of $56 million, which was the carrying value of the
     indexed debt at March 31, 1999.

          Additionally, a $13 million credit to adjust the indexed debt to
     settlement value at March 31, 1999, is included in net interest and other
     financial costs.

          In December 1996, USX had issued $117 million of notes indexed to the
     common share price of RTI.  At maturity, USX would have been required to
     exchange the notes for shares of RTI common stock, or redeem the notes for
     the equivalent amount of cash.  Since USX's investment in RTI was
     attributed to the U. S. Steel Group, the indexed debt was also attributed
     to the U. S. Steel Group.  USX had a 26% investment in RTI and accounted
     for its investment using the equity method of accounting.

<PAGE> 74

                      U. S. STEEL GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)

     8.   Income (loss) from operations includes net periodic pension credits of
     $47 million and $51 million in the third quarter of 1999 and 1998,
     respectively, ($188 million and $153 million in the nine months of 1999 and
     1998, respectively.)  These pension credits are primarily noncash and for
     the most part are included in selling, general and administrative expenses.

          In the second quarter of 1999, the U. S. Steel Group recognized a one-
     time pretax settlement gain of $35 million, related mainly to pension costs
     of employees who retired under the U. S. Steel Group 1998 voluntary early
     retirement program.  This noncash settlement gain is included in selling,
     general and administrative expenses.

     9.   Inventories are carried at the lower of cost or market.  Cost of
     inventories is determined primarily under the last-in, first-out (LIFO)
     method.
<TABLE>
<CAPTION>
                                                         (In millions)
                                                   -------------------------
                                                   September 30 December 31
                                                       1999         1998
                                                   -----------  -----------
    <S>                                                 <C>          <C>
    Raw materials                                       $116         $185
    Semi-finished products                               350          282
    Finished products                                    205          182
    Supplies and sundry items                             48           49
                                                        ----          ----
      Total                                             $719         $698
                                                        ====          ====
</TABLE>
10.  The U. S. Steel Group participated in an agreement (the program),
to sell an undivided interest in certain accounts receivable.
At September 30, 1999, the amount sold under the program that had not been
collected was $350 million. On October 15, 1999, the agreement expired.

     11.  At September 30, 1999, accounts receivable includes an estimated
     income tax receivable from the Marathon Group of $59 million, determined in
     accordance with the tax allocation policy discussed in Note 2.

<PAGE> 75

                      U. S. STEEL GROUP OF USX CORPORATION
               SELECTED NOTES TO FINANCIAL STATEMENTS (Continued)
               --------------------------------------------------
                                   (Unaudited)


     12.  USX is the subject of, or a party to, a number of pending or
     threatened legal actions, contingencies and commitments relating to the U.
     S. Steel Group involving a variety of matters including laws and
     regulations relating to the environment.  Certain of these matters are
     discussed below.  The ultimate resolution of these contingencies could,
     individually or in the aggregate, be material to the U. S. Steel Group
     financial statements.  However, management believes that USX will remain a
     viable and competitive enterprise even though it is possible that these
     contingencies could be resolved unfavorably to the U. S. Steel Group.  See
     discussion of Liquidity in USX Consolidated Management's Discussion and
     Analysis of Financial Condition and Results of Operations.

          The U. S. Steel Group is subject to federal, state and local laws and
     regulations relating to the environment.  These laws generally provide for
     control of pollutants released into the environment and require responsible
     parties to undertake remediation of hazardous waste disposal sites.
     Penalties may be imposed for noncompliance.  At September 30, 1999, and
     December 31, 1998, accrued liabilities for remediation totaled $98 million
     and $97 million, respectively.  It is not presently possible to estimate
     the ultimate amount of all remediation costs that might be incurred or the
     penalties that may be imposed.

          For a number of years, the U. S. Steel Group has made substantial
     capital expenditures to bring existing facilities into compliance with
     various laws relating to the environment.  In the first nine months of 1999
     and for the years 1998 and 1997, such capital expenditures totaled $19
     million, $49 million and $43 million, respectively.  The U. S. Steel Group
     anticipates making additional such expenditures in the future; however, the
     exact amounts and timing of such expenditures are uncertain because of the
     continuing evolution of specific regulatory requirements.

          Guarantees by USX of the liabilities of affiliated entities of the U.
     S. Steel Group totaled $89 million at September 30, 1999.  In the event
     that any defaults of guaranteed liabilities occur, USX has access to its
     interest in the assets of the affiliates to reduce U. S. Steel Group losses
     resulting from these guarantees.  As of September 30, 1999, the largest
     guarantee for a single affiliate was $61 million.

          The U. S. Steel Group's contract commitments to acquire property,
     plant and equipment at September 30, 1999, totaled $90 million compared
     with $188 million at December 31, 1998.


<PAGE> 76
                      U. S. STEEL GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                 -----------------------------------------------

     The U. S. Steel Group includes U. S. Steel, which is engaged in the
production, transportation and sale of steel mill products, coke, and taconite
pellets; the management of mineral resources; domestic coal mining; real estate
development; and engineering and consulting services.  Certain business
activities are conducted through joint ventures and partially owned companies,
such as, USS-POSCO Industries ("USS-POSCO"), PRO-TEC Coating Company ("PRO-
TEC"), Transtar, Inc. ("Transtar"), Clairton 1314B Partnership, Lorain Tubular
Company LLC, Republic Technologies International LLC ("Republic") and VSZ
U. S. Steel, s. r.o ("VSZ").  Management's Discussion and Analysis should be
read in conjunction with the U. S. Steel Group's Financial Statements and
Notes to Financial Statements.  The discussion of Results of Operations
should be read in conjunction with the Supplemental Statistics provided
on page 88.

     Certain sections of Management's Discussion and Analysis include forward-
looking statements concerning trends or events potentially affecting the
businesses of the U. S. Steel Group. These statements typically contain words
such as "anticipates," "believes," "estimates," "expects" or similar words
indicating that future outcomes are not known with certainty and subject to risk
factors that could cause these outcomes to differ significantly from those
projected. In accordance with "safe harbor" provisions of the Private Securities
Litigation Reform Act of 1995, these statements are accompanied by cautionary
language identifying important factors, though not necessarily all such factors,
that could cause future outcomes to differ materially from those set forth in
forward-looking statements. For additional risk factors affecting the businesses
of the U. S. Steel Group, see Supplementary Data -- Disclosures About Forward-
Looking Statements in USX
1998 Form 10-K.

Results of Operations
- ---------------------
     Revenues for the third quarter and first nine months of 1999 and 1998 are
set forth in the following table:
<TABLE>
<CAPTION>
                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions)                            1999   1998     1999     1998
                                                ------  ------  ------   ------

<S>                                             <C>     <C>     <C>      <C>
Revenues of reportable segment                  $1,387  $1,497  $3,924   $4,926
Revenues not allocated to reportable segment      (53)       -     (75)       -
                                                 -----   -----   -----    -----
 Total Revenues                                 $1,334  $1,497  $3,849   $4,926
</TABLE>
     Total reportable segment revenues decreased by $110 million and $1,002
million in the third quarter and first nine months of 1999, respectively,
compared with the same periods in 1998.  The decrease in revenues in third
quarter 1999 primarily reflected lower average steel product prices (average
prices decreased $61/ton in the third quarter of 1999 compared to the same
period in 1998), partially offset by higher shipments.  The decrease in revenues
in the first nine months of 1999 primarily reflected lower average steel product
prices (average prices decreased $52/ton in the first nine months of 1999
compared to the same period in 1998), lower shipment volumes (shipments
decreased 580,000 tons in the first nine months of 1999), and lower income from
affiliates.
<PAGE> 77

                      U. S. STEEL GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATION
                  --------------------------------------------

     Income from operations for the U. S. Steel Group for the third quarter and
first nine months of 1999 and 1998 is set forth in the following table:
<TABLE>
<CAPTION>
                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions)                            1999   1998     1999     1998
                                                ------  ------  ------   ------
<S>                                              <C>    <C>    <C>       <C>
Segment income (loss) for U.S.Steel Operations(a)$(51)   $41    $(119)    $301
Items not allocated to segment:
 Pension credits                                   100    94      348      280
 Administrative expenses                            (4)   (6)     (17)    (20)
 Costs related to former business activities (b)   (21)  (24)     (65)     (77)
 Impairment of USX's investment in USS/Kobe and
  costs related to formation of Republic (c)       (53)    -      (53)       -
 Loss on investment in RTI stock used to satisfy
  indexed debt obligations (d)                       -        -    (22)       -
                                                 -----   -----   -----    -----
  Total Group income from operations              $(29)   $105     $72     $484
                                                 =====   =====   =====    =====
- -----
<FN>
         (a) Includes income (loss) from the production and sale of steel mill
      products, coke and taconite pellets; the management of mineral resources;
      domestic coal mining; real estate development; and engineering and
      consulting services.
         (b) Includes the portion of postretirement benefit costs and certain
      other expenses principally attributable to former business units of the
      U. S. Steel Group.
         (c) For further details, see Note 3 to the U. S. Steel Group Financial
      Statements.
         (d) For further details, see Note 7 to the U. S. Steel Group Financial
      Statements.
</TABLE>
Segment income for U. S. Steel operations

     Segment income for U. S. Steel operations decreased $92 million and $420
million in the third quarter and first nine months of 1999, respectively,
compared with the same periods in 1998.  The decrease in segment income in third
quarter 1999 was primarily due to lower average steel prices, less favorable
product mix, lower income from affiliates, and higher benefit costs including
provisions for the new labor contract.  The decrease in segment income in the
first nine months of 1999 was primarily due to lower average steel prices, lower
shipment volumes, lower income from affiliates, and higher benefit costs
including provisions for the new labor contract.  Segment income in the third
quarter of 1999 included a $7 million charge for legal accruals.  Segment income
for the first nine months of 1999 included a $10 million charge for
environmental accruals. Results in the first nine months of 1998 included a
favorable $30 million (net of charges and reserves) insurance litigation
settlement pertaining to the 1995 Gary (Ind.) Works No. 8 blast furnace
explosion.

     Steel product prices and shipment volumes continue to be negatively
affected by the ongoing effects of steel imports and the continued weakness in
tubular and plate markets.  U. S. Steel's average price realization was $405 per
ton and $421 per ton in third quarter and first nine months of 1999,
respectively, compared to $466 per ton and $473 per ton in the same periods in
1998.

Items not allocated to segment

     Pension credits associated with pension plan assets and liabilities
allocated to pre-1987 retirees, former businesses, and certain corporate
activities are not included in segment income for U. S. Steel operations. These
pension credits, which
<PAGE> 78

                      U. S. STEEL GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATION
                  --------------------------------------------

are primarily noncash, totaled $100 million and $348 million in the third
quarter and first nine months of 1999, respectively, compared to $94 million and
$280 million in the same period in 1998.  Pension credits in the first nine
months of 1999 included $35 million for a one-time favorable pension settlement,
which was recorded in second quarter 1999, primarily related to the voluntary
early retirement program for salaried employees.

     Pension credits, combined with pension costs included in segment income for
U. S. Steel operations, resulted in net pension credits of $46 million and $186
million in the third quarter and first nine months of 1999, respectively,
compared to $50 million and $147 million in the same periods in 1998.  Net
pension credits are expected to be approximately $235 million in 1999.  Future
net pension credits can be volatile depending upon the future marketplace
performance of plan assets, changes in actuarial assumptions regarding such
factors as a selection of a discount rate and rate of return on assets, changes
in the amortization levels of transition amounts or prior period service costs,
plan amendments affecting benefit payout levels and profile changes in the
beneficiary populations being valued.  Changes in any of these factors could
cause net pension credits to change. To the extent net pension credits decline
in the future, income from operations would be adversely affected. For
additional information on pensions, see the discussion of "Outlook" below.

     Net interest and other financial costs for the third quarter and first nine
months of 1999 and 1998 are set forth in the following table:
<TABLE>
<CAPTION>
                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions)                            1999   1998     1999     1998
                                                ------  ------  ------   ------
<S>                                                <C>     <C>     <C>      <C>
Net interest and other financial costs             $20     $10     $48      $60
Less:
  Favorable adjustments to
  carrying value of indexed debt (a)                 -      11      13        7
                                                 -----   -----   -----    -----
Net interest and other financial costs
 adjusted to exclude above item                    $20     $21     $61      $67
                                                 =====   =====   =====    =====
- -----
<FN>
       (a) For discussion, see Note 7 to the U. S. Steel Group Financial
        Statements.
</TABLE>

     Adjusted net interest and other financial costs decreased by $1 million and
$6 million in the third quarter and first nine months of 1999, respectively, as
compared with the same periods in 1998.

     The provision (credit) for estimated income taxes in the third quarter and
first nine months of 1999 decreased compared to the same periods in 1998 due to
a decline in income from operations.  The provision for estimated income taxes
for the first nine months of 1998 included a $9 million favorable foreign tax
adjustment as a result of a favorable resolution of foreign tax litigation.

     The extraordinary loss on extinguishment of debt of $5 million (net of $3
million income tax benefit) in the first nine months of 1999 represents prepaid
interest expense and the write-off of unamortized debt issue costs resulting
from the satisfaction of USX's obligation of its indexed debt. For further
discussion, see Note 6 to the U. S. Steel Group Financial Statements.

     Net income decreased $96 million and $278 million in the third quarter and
first nine months of 1999, respectively, compared to the same periods in 1998,
primarily reflecting the factors discussed above.

<PAGE> 79

                      U. S. STEEL GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATION
                  --------------------------------------------

Operating Statistics
- --------------------
     Steel shipments in third quarter 1999 of 2.8 million tons, increased 11%
from the same period in 1998. Steel shipments in the first nine months of 1999
of 7.8 million tons, decreased 7% from the same period in 1998. Third quarter
and first nine months of 1999 raw steel production of 3.1 million tons and 8.9
million tons, increased 12% and 1%, respectively, from the same periods in 1998.
Raw steel capability utilization in the third quarter and first nine months of
1999 averaged 94.9% and 93.0%, respectively, compared to 84.6% and 91.6% in the
same period in 1998.  Steel shipments, production and raw steel capability
utilization in the first nine months of 1999 continued to be negatively impacted
by the ongoing effects of steel imports and weak plate and tubular markets.

Cash Flows
- ----------
     Net cash provided from operating activities in the first nine months of
1999 was $158 million, compared with $293 million in the same period in 1998.
The first nine months of 1998 included proceeds of $38 million for the insurance
litigation settlement pertaining to the 1995 Gary Works No. 8 blast furnace
explosion.  Excluding this item, net cash provided from operating activities
decreased $97 million due mainly to decreased profitability.

     Capital expenditures in the first nine months of 1999 were $221 million,
compared with $228 million in the same period in 1998.  Contract commitments for
capital expenditures at September 30, 1999, totaled $90 million, compared with
$188 million at year-end 1998.

     Net cash used in investments in equity affiliates in the first nine months
of 1999 of $15 million primarily reflects  an investment in Republic during the
third quarter (see Note 3 to the U. S. Steel Group Financial Statements for
further discussion). Net cash used in investments in equity affiliates in the
first nine months of 1998 of $66 million primarily reflects funding for VSZ.

     Financial obligations (excluding the noncash satisfaction of the indexed
debt) increased by $135 million in the first nine months of 1999.  Financial
obligations consist of the U. S. Steel Group's portion of USX debt and preferred
stock of a subsidiary attributed to both groups, as well as debt and financing
agreements specifically attributed to the U. S. Steel Group.  The increase in
financial obligations resulted from capital expenditures and dividend payments
exceeding cash from operating activities.

     USX had an agreement (the program) to sell an undivided interest in
certain accounts receivable of the U. S. Steel Group.  Subsequent to the
expiration of the program on October 15, 1999, USX entered into an agreement
to repurchase all accounts remaining outstanding. See Note 10 to the
U. S. Steel Group Financial Statements.

Derivative Instruments
     See Quantitative and Qualitative Disclosures About Market Risk for
discussion of derivative instruments and associated market risk for U. S. Steel
Group.

Liquidity
     For discussion of USX's liquidity and capital resources, see Management's
Discussion and Analysis of USX Consolidated Financial Condition, Cash Flows and
Liquidity.

Environmental Matters, Litigation and Contingencies
- ---------------------------------------------------
     The U. S. Steel Group has incurred and will continue to incur substantial
capital, operating and maintenance, and remediation expenditures as a result of
environmental laws and regulations. In recent years, these expenditures have
been
<PAGE> 80

                      U. S. STEEL GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATION
                  --------------------------------------------

mainly for process changes in order to meet Clean Air Act obligations, although
ongoing compliance costs have also been significant. To the extent these
expenditures, as with all costs, are not ultimately reflected in the prices of
the U. S. Steel Group's products and services, operating results will be
adversely affected. The U. S. Steel Group believes that all of its domestic
competitors are subject to similar environmental laws and regulations. However,
the specific impact on each competitor may vary depending on a number of
factors, including the age and location of its operating facilities, marketing
areas, production processes and the specific products and services it provides.
To the extent that competitors are not required to undertake equivalent costs in
their operations, the competitive position of the U. S. Steel Group could be
adversely affected.

     USX has been notified that it is a potential responsible party ("PRP") at
26 waste sites related to the U. S. Steel Group under the Comprehensive
Environmental Response, Compensation and Liability Act ("CERCLA") as of
September 30, 1999.  In addition, there are 12 sites related to the U. S. Steel
Group where USX has received information requests or other indications that USX
may be a PRP under CERCLA but where sufficient information is not presently
available to confirm the existence of liability or make any judgment as to the
amount thereof.  There are also 35 additional sites related to the U. S. Steel
Group where remediation is being sought under other environmental statutes, both
federal and state, or where private parties are seeking remediation through
discussions or litigation.  At many of these sites, USX is one of a number of
parties involved and the total cost of remediation, as well as USX's share
thereof, is frequently dependent upon the outcome of investigations and remedial
studies.  The U. S. Steel Group accrues for environmental remediation activities
when the responsibility to remediate is probable and the amount of associated
costs is reasonably determinable. As environmental remediation matters proceed
toward ultimate resolution or as additional remediation obligations arise,
charges in excess of those previously accrued may be required.

     USX is the subject of, or a party to, a number of pending or threatened
legal actions, contingencies and commitments relating to the U. S. Steel Group
involving a variety of matters, including laws and regulations relating to the
environment, certain of which are discussed in Note 12 to the U. S. Steel Group
Financial Statements. The ultimate resolution of these contingencies could,
individually or in the aggregate, be material to the U. S. Steel Group Financial
Statements. However, management believes that USX will remain a viable and
competitive enterprise even though it is possible that these contingencies could
be resolved unfavorably to the U. S. Steel Group.

Outlook
- -------
     Shipment volumes in the fourth quarter for U. S. Steel Group are expected
to be higher than fourth quarter 1998.  However, the favorable effects of
increased shipments are expected to be more than offset by lower price
realizations, less favorable product mix including a substantial amount of semi-
finished sales, and weakness in plate.  Price realizations in the fourth quarter
1999, while lower than fourth quarter 1998, are expected to be higher than the
third quarter 1999, as previously announced price increases are realized.  In
recent years, demand for steel in the United States has been at high levels.
Any weakness in the United States economy for capital goods or consumer durables
could further adversely impact U. S. Steel Group's product prices and shipment
levels.

     Income from equity affiliates will be negatively impacted by losses
associated with Republic.  Republic has stated that it expects to incur
operating losses through 2000 and nonrecurring charges associated with the
consolidation of the combined operations.  USX will recognize its share of any
such losses under the equity method of accounting.
<PAGE> 81

                      U. S. STEEL GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATION
                  --------------------------------------------


        The forgoing discussion includes statements concerning anticipated
   steel pricing, product mix, and shipment levels are forward-looking and are
   based upon assumptions as to future product demand, prices and mix, and
   levels of steel production capability, production and shipments.  These
   forward-looking statements can be affected by imports, domestic and
   international economies, domestic production capacity, and customer demand.
   In the event these assumptions prove to be inaccurate, actual results may
   differ significantly from those presently anticipated.

     In August members of United Steelworkers of America ("USWA") ratified a new
five-year labor contract covering approximately 14,500 employees effective
August 1, 1999.  The new labor contract, which includes $2.00 in hourly wage
increases phased in over the term of the agreement beginning in 2000 as well as
pension and other benefit improvements for active and retired employees and
spouses, will result in higher labor and benefit costs for the U. S. Steel Group
each year throughout the term of the contract.  Net pension credits for the U.
S. Steel Group are estimated to be reduced by approximately $4 million per month
beginning August 1, 1999 for the balance of the year. Management believes that
this agreement is competitive with labor agreements reached by U. S. Steel's
major domestic integrated competitors and thus does not believe that U. S.
Steel's competitive position with regard to such other competitors will be
materially affected.

     Steel imports to the United States accounted for an estimated 27%, 30% and
24% of the domestic steel market in the first eight months of 1999, and for the
years 1998 and 1997, respectively.

     On September 30, 1998, USX joined with 11 other producers, the USWA and the
Independent Steelworkers Union ("ISU") to file trade cases against Japan,
Russia, and Brazil.  Those filings contended that millions of tons of unfairly
traded hot-rolled carbon sheet products have caused serious injury to the
domestic steel industry through rapidly falling prices and lost business. In the
case against Japan, on April 28, 1999, the U.S. Department of Commerce
("Commerce"), announced final antidumping ("AD") duty determinations and, on
June 11, 1999, the U.S.  International Trade Commission ("ITC") announced its
final determination that the imports from Japan were injuring the domestic
industry.  The final AD order against Japan was issued on June 23, 1999.  In the
cases against Brazil, on July 7, 1999, Commerce announced final countervailing
("CVD") and AD duty determinations and, contemporaneously, announced that it had
entered into agreements with Brazil to
suspend the investigations.  In the case against Russia, on July 13, 1999,
Commerce announced final AD duty determinations and, contemporaneously,
announced that it had entered into an agreement with Russia to suspend the
investigation.  In addition, Commerce announced that it had also entered into a
comprehensive agreement concerning all steel product imports from Russia except
for plate products and hot-rolled products.  Plate products from Russia are
subject to a suspension agreement signed in 1997.  On August 16, 1999, USX,
along with four other integrated domestic producers, filed appeals with U.S.
Court of International Trade challenging the hot-rolled carbon sheet products
suspension agreements with Brazil and Russia.

     On February 16, 1999, USX joined with four other producers and the USWA to
file trade cases against eight countries (Japan, South Korea, India, Indonesia,
Macedonia, the Czech Republic, France, and Italy) concerning imports of cut-to-
length plate products.  AD cases were filed against all the countries and CVD
duty
<PAGE> 82

                      U. S. STEEL GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATION
                  --------------------------------------------

cases were filed against six of the countries.  On April 2, 1999, the ITC issued
its preliminary determination that the domestic industry was being injured or
threatened with injury as the result of imports from six of the countries.  The
ITC determined that the volume of imports from Macedonia and the Czech Republic
were negligible and had declined in importance in the United States market
relative to the other countries.  On July 20, 1999, Commerce announced
preliminary AD and CVD duty determinations.  The preliminary injury
determination and the preliminary duty determinations are subject to further
investigation by the ITC and Commerce.

     On June 2, 1999, USX joined with eight other producers and the USWA and the
ISU to file trade cases against twelve countries (Argentina, Brazil, China,
Indonesia, Japan, Russia, South Africa, Slovakia, Taiwan, Thailand, Turkey, and
Venezuela) concerning imports of cold-rolled products.  AD cases were filed
against all the countries and CVD duty cases were filed against Brazil,
Indonesia, Thailand, and Venezuela.  On July 19, 1999, the ITC issued its
preliminary determination that the domestic industry was being injured or
threatened with injury as the result of imports from all of the countries.  The
ITC, by a divided vote, decided to discontinue the CVD investigations of
subsidized imports from Indonesia, Thailand, and Venezuela.  On September 28,
1999, Commerce announced preliminary CVD duty determinations against Brazil, and
on November 2, 1999, announced preliminary AD duty determinations against
Argentina, Brazil, Japan, Russia, South Africa, Thailand, and Venezuela.
Commerce is expected to announce preliminary AD duty determinations with respect
to the other countries later in the year. These cases are subject to further
investigation by both the ITC and Commerce.

     On June 30, 1999, USX joined with four other producers and the USWA to file
trade cases against five countries (the Czech Republic, Japan, Mexico, Romania,
and South Africa) concerning imports of large and small diameter carbon and
alloy standard, line, and pressure pipe.  On July 20, 1999, Commerce announced
its decision to initiate an investigation and the ITC's preliminary staff
hearing was conducted on July 21, 1999.  On August 13, 1999, the ITC issued its
preliminary determination that the domestic industry was being injured or
threatened with injury as the result of imports from all of the countries.
Commerce is expected to announce preliminary duty determinations later in the
year.  These cases are subject to further investigation by both the ITC and
Commerce.

     USX intends to file additional antidumping and countervailing duty
petitions if unfairly traded imports adversely impact, or threaten to adversely
impact, the results of the U. S. Steel Group.

Year 2000 Readiness Disclosure
- ------------------------------
     A multi-functional Year 2000 task force continues to execute a preparedness
plan which addresses readiness requirements for business computer systems,
technical infrastructure, end-user computing, third parties, manufacturing,
environmental operations, systems products produced and sold, and dedicated R&D
test facilities. The U. S. Steel Group Year 2000 readiness plan includes:

    -  prioritizing and focusing on those computerized and automated systems
       and processes critical to the operations in terms of material safety,
       operational, environmental, quality and financial risk to the company.
    -  allocating and committing appropriate resources to fix the problem.
    -  developing detailed contingency plans for those systems critical to
       the operations in terms of material operational, safety, environmental
       and financial risk to the company.
    -  communicating with, and aggressively pursuing, critical third parties
       to help ensure the Year 2000 readiness of their products and services
       through use of mailings, telephone contacts, on-site assessments and
       the inclusion of Year 2000 readiness language in purchase orders and
       contracts.
<PAGE> 83

                      U. S. STEEL GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATION
                  --------------------------------------------

    -  performing rigorous Year 2000 tests of critical systems.
    -  participating in, and exchanging Year 2000 information with industry
       trade associations, such as the American Iron & Steel Institute,
       Association of Iron & Steel Engineers and the Steel Industry Systems
       Association.
    -  engaging qualified outside engineering and information technology
       consulting firms to assist in the Year 2000 impact assessment and
       readiness effort.

State of Readiness

     The Year 2000 inventory and date impact assessment activities for both
information technology ("IT") and non-IT systems/processes within the U. S.
Steel Group are complete.  IT systems/processes are 99.7% Year 2000 ready as of
September 30, 1999, and the non-IT area is 99.7% ready. There are a few
systems/processes which will be replaced or upgraded with third-party Year 2000
ready products and services during the fourth quarter, 1999.  However, realistic
implementation schedules have been established for such systems/processes and
none of the remaining work will jeopardize or impede U.S. Steel Group's ability
to meet ongoing production and customer service commitments.

     The remaining Year 2000 efforts in 1999 will primarily focus on (1)
monitoring and verifying the readiness of third parties critical to the business
operations, (2) reviewing the effectiveness of the contingency plans that have
been developed, (3) preparing and communicating final plans to the workforce and
affected entities for the transition to the new century and (4) conducting the
final round of Year 2000 assessments by the internal audit team.

     The following table provides the percent of completion for the inventory of
systems and processes that may be affected by the year 2000 ("Y2K Inventory"),
the analysis performed to determine the Year 2000 date impact on inventoried
systems and processes ("Y2K Impact Assessment") and the year 2000 readiness of
the U. S. Steel Group's year 2000 inventory ("Y2K Readiness of Overall
Inventory"). The percent of completion for Y2K Readiness of Overall Inventory
includes all inventory items not date impacted, those items already Year 2000
ready and those corrected and made Year 2000 ready through the
renovation/replacement, testing and implementation activities.
<TABLE>
<CAPTION>
                                                   Percent Completed
                                                                 Y2K
                                                         Y2K  Readiness
                                                        Impact    of
                                                 Y2K   Assess- Overall
As of September 30, 1999                      Inventory  ment Inventory
                                                ------  ------  ------
<S>                                               <C>     <C>    <C>
Information Technology                            100%    100%   99.7%
Non-Information Technology                        100%    100%   99.7%
</TABLE>
Third Parties

     The U. S. Steel Group continues to monitor and verify the Year 2000
readiness of its third party relationships (including, but not limited to
utility providers, outside processors, process control systems and hardware
suppliers, telecommunication providers, electronic commerce and transportation
carriers) who are critical to its operations.  Contacts have already been made
with critical third
<PAGE> 84

                      U. S. STEEL GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATION
                  --------------------------------------------

parties to determine if they will be able to provide their products and services
to the U. S. Steel Group after the Year 2000.  Communications with U. S. Steel
Group's third parties is an on-going process which includes mailings, telephone
contacts and on-site visits. If it is determined that there is a significant
risk with a third party, an effort will be made to work with those third parties
to resolve the issue, or a new provider of the same products or services will be
investigated and secured. The U. S. Steel Group plans to continue monitoring the
readiness of its critical third parties for the remainder of the year.
The Costs to Address Year 2000 Issues

     The current estimated cost associated with Year 2000 readiness, is
approximately $29 million, which includes $16 million in incremental cost.
Total costs incurred as of September 30, 1999, were $23 million, including $13
million of incremental costs.  In the third quarter, the estimated total project
costs were reaffirmed.

Year 2000 Risks to the Company

     The most reasonably likely worst case Year 2000 scenario would be the
inability of third party suppliers, such as utility providers, telecommunication
companies, outside processors, and other critical suppliers, to continue
providing
their products and services. This could pose the greatest material safety,
operational, environmental, quality and/or financial risk to the company.

     In addition, the lack of accurate and timely Year 2000 date impact
information from suppliers of automation and process control systems and
processes is a concern to the U. S. Steel Group. Without reliable information
from suppliers, specifically on embedded chip technology, some Year 2000
problems could go undetected during the transition to the year 2000.  The U.S.
Steel Group has performed extensive testing on the systems and devices that
utilize a date function.  However, in those cases where there is no date
function, the U.S. Steel Group relies on the supplier's Year 2000 readiness
information.

Contingency Planning

     Since no one can predict with certainty the outcome of this unprecedented
Year 2000 event, the U. S. Steel Group's primary strategy and defense against
Year 2000 related problems is to diligently continue to mitigate risks through
review and extensive testing of its critical systems/processes. Contingency
plans have been developed and documented to provide continuity in the key
business operations and corollary customer service.  These plans were developed
by contingency planning work groups representing each business/producing
location with an executive steering committee overseeing the development
process.

     The contingency planning strategies generally being employed include; (1)
idle or shut down facilities for a short duration (minutes/hours in most cases
as opposed to days) over the critical period during the change of the century to
protect personnel and safeguard equipment and facilities, (2) curtail the
processing of hot metal during the highest period of risk, (3) schedule extra
key personnel over the critical turn of the century period to prepare the
processing environment, to monitor conditions and to evaluate when it is safe to
resume normal operations, (4) procure auxiliary power generation for critical
functions with consideration to both the potential impact of Year 2000 and
extreme inclement weather conditions, (5) establish strategically located
command centers with appropriate communication
<PAGE> 85

                      U. S. STEEL GROUP OF USX CORPORATION
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATION
                  --------------------------------------------

facilities to collect and disseminate important information and to activate
emergency escalation procedures, (6) review and adjust inventory levels as
business conditions dictate to provide continuity in customer service, and (7)
continue to evaluate the readiness of regular and alternate third party
suppliers and service
providers to help assure the availability and continuity of critical products
and services.

     During the remainder of 1999, the contingency plans will be adjusted and
tested, as applicable, as business conditions warrant.

     This discussion includes forward-looking statements of the U. S. Steel
Group's efforts and management's expectations relating to Year 2000 readiness.
The Steel Group's ability to achieve Year 2000 readiness and the level of
incremental costs associated therewith, could be adversely impacted by, among
other things, vendors' ability to install or modify remaining proprietary
hardware and software and unanticipated problems identified in the ongoing Year
2000 readiness review. Also, the U. S. Steel Group's ability to mitigate Year
2000 risks could be adversely impacted by the effectiveness of contingency
plans.

Accounting Standard
- --------------------
     In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards ("SFAS") No. 133, "Accounting for Derivative
Instruments and Hedging Activities".  This new standard requires recognition of
all derivatives as either assets or liabilities at fair value.  This new
standard may result in additional volatility in both current period earnings and
other comprehensive income as a result of recording recognized and unrecognized
gains and losses resulting from changes in the fair value of derivative
instruments.  At adoption this new standard requires a comprehensive review of
all outstanding derivative instruments to determine whether or not their use
meets the hedge accounting criteria.  Upon adoption, there may be derivative
instruments employed by USX that do not meet all of the designated hedge
criteria and they will be reflected in income on a mark-to-market basis.  Based
upon the strategies currently used by USX and the level of activity related to
forward exchange contracts and commodity-based derivative instruments in recent
periods, USX does not anticipate the effect of adoption to have a material
impact on either financial position or results of operations for the U. S. Steel
Group.  The effective date of SFAS No. 133 was amended by SFAS No. 137.  USX
plans to adopt the standard effective January 1, 2001, as required.
<PAGE> 86

                      U. S. STEEL GROUP OF USX CORPORATION
                          QUANTITATIVE AND QUALITATIVE
                          DISCLOSURES ABOUT MARKET RISK
                    -----------------------------------------

Commodity Price Risk and Related Risks
- --------------------------------------
     Sensitivity analysis of the incremental effects on pretax income of
hypothetical 10% and 25% decreases in commodity prices for open derivative
commodity instruments as of September 30, 1999, are provided in the following
table:
<TABLE>
<CAPTION>
                                                      Incremental Decrease
                                                        in Pretax Income
                                                    Assuming a Hypothetical
                                                      Price Change of (a):
(Dollars in millions)                                  10%          25%
- --------------------------------------------------------------------------------
<S>                                                    <C>          <C>
Derivative Commodity Instruments
U. S. Steel Group
    Natural gas (price decrease)                        $2.8         $7.0
    Zinc (price decrease)                                2.7          6.8
    Tin (price decrease)                                  .3           .7
    Nickel (price decrease)                                0           .1

<FN>
      (a)  Gains and losses on derivative commodity instruments are generally
      offset by price changes in the underlying commodity.  Effects of these
      offsets are not reflected in the sensitivity analyses.  Amounts reflect
      the estimated incremental effect on pretax income of hypothetical 10% and
      25% changes in closing commodity prices for each open contract position
      at September 30, 1999. U. S. Steel Group management evaluates its
      portfolio of derivative commodity instruments on an ongoing basis and
      adds or revises strategies to reflect anticipated market conditions and
      changes in risk profiles.  Changes to the portfolio subsequent to
      September 30, 1999, would cause future pretax income effects to differ
      from those presented in the table.
</TABLE>
<PAGE> 87

                      U. S. STEEL GROUP OF USX CORPORATION
                          QUANTITATIVE AND QUALITATIVE
                          DISCLOSURES ABOUT MARKET RISK
                    -----------------------------------------

Interest Rate Risk
- ------------------
     As of September 30, 1999, the discussion of the U. S. Steel Group's
interest rate risk has not changed materially from that presented in
Quantitative and Qualitative Disclosures About Market Risk included in USX's
1998 Form 10-K.

Foreign Currency Exchange Rate Risk
- -----------------------------------
     As of September 30, 1999, the U. S. Steel Group had no material exposure to
foreign currency exchange rate risk.

Equity Price Risk
- -----------------
     USX was subject to equity price risk resulting from its issuance in
December 1996 of $117 million of 6 3/4% Exchangeable Notes due February 1, 2000
("indexed debt").  However, on March 31, 1999, USX irrevocably deposited with a
trustee the entire 5.5 million shares it owned in RTI. The deposit of shares
resulted in the satisfaction of USX's obligation under the indexed debt. Under
the terms of the indenture, the trustee will exchange the RTI shares for the
notes at maturity.  USX is no longer exposed to any negative risks associated
with changes in the value of RTI common stock. For further discussion, see Note
to the U.S. Steel Group Financial Statements.

Safe Harbor
- -----------
     The U. S. Steel Group's quantitative and qualitative disclosures about
market risk include forward-looking statements with respect to management's
opinion about risks associated with the U. S. Steel Group's use of derivative
instruments. These statements are based on certain assumptions with respect to
market prices and industry supply and demand for steel products and certain raw
materials. To the extent that these assumptions prove to be inaccurate, future
outcomes with respect to the U. S. Steel Group's hedging programs may differ
materially from those discussed in the forward-looking statements.



<PAGE> 88
<TABLE>
<CAPTION>
                       U.S. STEEL GROUP OF USX CORPORATION
                       SUPPLEMENTAL STATISTICS (Unaudited)
                       -----------------------------------

                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
(Dollars in millions)                            1999    1998    1999     1998
- --------------------------------------------------------------------------------
<S>                                             <C>     <C>     <C>      <C>
REVENUES                                        $1,334  $1,497  $3,849   $4,926

INCOME (LOSS) FROM OPERATIONS

 U. S. Steel Operations (a) (b)                  $(51)     $41  $(119)     $301
 Items not allocated to segment:
   Pension Credits (c)                            100       94    348       280
   Administrative Expenses                        (4)       (6)   (17)      (20)
  Cost related to former business activities (d) (21)      (24)   (65)      (77)
   Impairment of USX's investment in USS/Kobe
     and costs related to the formation of
     Republic (e)                                 (53)       -    (53)       -
   Loss on settlement of indexed debt with
     RTI International Metals, Inc. Stock           -        -    (22)       -
                                                  ----    ----    ----     ----
Total U. S. Steel Group                            (29)    105      72      484

PENSION COSTS INCLUDED IN U. S. STEEL OPERATIONS   $54     $44    $162     $133

CAPITAL EXPENDITURES                               $68     $92    $221     $228

OPERATING STATISTICS

 Average steel price per ton                      $405    $466    $421     $473
 Steel Shipments (f)                             2,835   2,554   7,764    8,344
 Raw Steel-Production (f)                        3,061   2,729   8,901    8,774
 Raw Steel-Capability Utilization (g)            94.9%   84.6%   93.0%    91.6%
 Total iron ore shipments (f)                    4,706   4,555  10,892   11,327
- ----------
<FN>
      (a)  Results in the third quarter of 1999 included a $7 million charge
      for legal accruals.  Results in the first nine months of 1999 included a
      $10 million charge, which was recorded in first quarter 1999, for
      environmental accruals. Results in first nine months of 1998 included
      approximately $30 million (net of related charges and reserves) for the
      settlement of litigation against company's property insurers to recover
      losses related to a 1995 explosion at the Gary Works No. 8 blast furnace.
      (b)  Includes the production and sale of steel products; coke and
      taconite pellets; domestic coal mining; the management of mineral
      resources; engineering and consulting services; and equity income from
      joint ventures and partially owned companies, such as USS-POSCO
      Industries, PRO-TEC Coating Company, Transtar Inc., Clairton 1314B
      Partnership, VSZ U. S. Steel, s. r.o., Lorain Tubular Company LLC,
      Republic Technologies International LLC, and until March 31, 1999, RTI
      International Metals, Inc. (formerly RMI Titanium Company).  Also
      includes results of real estate development and management, and leasing
      and financing activities.
      (c)  Results in the first nine months included $35 million for a pension
      settlement adjustment, which was recorded in second quarter 1999,
      primarily related to the early retirement program.
      (d)  Includes other postretirement benefit costs and certain other
      expenses principally attributable to former business units of the U. S.
      Steel Group.
      (e)  For additional information on the impairment, see Note 3 to the U.
      S. Steel Group Financial Statements.
      (f)  Thousands of net tons.
      (g)  Based on annual raw steel production capability of 12.8 million
      tons.
</TABLE>
<PAGE> 89

Part II - Other Information
- ----------------------------

     Item 1. LEGAL PROCEEDINGS

          U. S. Steel Group

               Inland Steel Patent Litigation

               In July 1991, Inland Steel Company ("Inland") filed an action
          against USX and another domestic steel producer in the U. S. District
          Court for the Northern District of Illinois, Eastern Division,
          alleging defendants had infringed two of Inland's steel-related
          patents.  Inland seeks monetary damages of up to approximately $50
          million and an injunction against future infringement.  USX in its
          answer and counterclaim alleges the patents are invalid and not
          infringed and seeks a declaratory judgment to such effect.  In May
          1993, a jury found USX to have infringed the patents.  The District
          Court has yet to rule on the validity of the patents.  In July 1993,
          the U. S. Patent Office rejected the claims of the two Inland patents
          upon a reexamination at the request of USX and the other steel
          producer.  A further request was submitted by USX to the Patent Office
          in October 1993, presenting additional questions as to patentability
          which was granted and consolidated for consideration with the original
          request.  In 1994, the Patent Office issued a decision rejecting all
          claims of the Inland patents.  On September 21, 1999, the Patent
          Office Board of Appeals affirmed the decision of the Patent Office.
          If Inland wishes to pursue this matter, it must now seek
          reconsideration of the decision or appeal to the courts.

               Mon Valley Works/Edgar Thomson Plant

               In October 1999, USX agreed to a consent decree addressing issues
          raised in a Notice of Violation ("NOV") issued by the U. S. EPA in
          January 1997.  The NOV alleged air quality violations at U. S. Steel's
          Edgar Thomson Plant, which is part of Mon Valley Works.  The consent
          decree addressed various operational requirements which U. S. EPA
          believes necessary or desirable to comply with the statute.  In the
          consent decree, USX agreed to pay a civil penalty of $550,000 and to
          implement five supplemental environmental projects worth $1.6 million.

               Storage Tank Permits

               In October 1999, USX entered into a Consent Order and Agreement
          with the Pennsylvania Department of Environmental Protection under the
          Pennsylvania Storage Tank and Spill Prevention Act.  The consent
          decree relates to failure to obtain all necessary permits with respect
          to the installation of three storage tanks at the Clairton Coke Works
          and the Irvin Plant at the Mon Valley Works.  The consent decree
          requires USX to obtain the necessary permits and assesses a fine of
          $115,000.

               Gary Benzene

               In February 1997, the U. S. EPA issued a Finding of Violation
          alleging improper sampling of benzene waste streams at the Gary Coke
          plant and demanding a cash payment of approximately $4 million.  The
          company is negotiating with the agency to settle the action.
<PAGE> 90

     Marathon Group

          Reference is made to the Form 10-Q for the quarter ending June 30,
     1999 for discussions concerning the Posted Price Litigation, multi-media
     inspection and other environmental cases.

Item 2.  Changes in Securities and Use of Proceeds

          (a)  On September 28, 1999, the Board of Directors of USX Corporation
          (the "Company") approved the extension of the benefits afforded by the
          Company's previous rights plan by adopting a new stockholder rights
          plan.  The new plan, like the previous plan, is intended to deter
          coercive or partial offers which will not provide fair value to all
          stockholders and enhance the Board's ability to represent all
          stockholders and thereby maximize stockholder values.

               Pursuant to the new Rights Agreement between the Company and
          ChaseMellon Shareholder Services, L.L.C., as Rights Agent, (i), one
          USX-U. S. Steel Group Right (a "Steel Right") was issued for each
          outstanding share of USX-U. S. Steel Group Common Stock ("Steel
          Stock") and (ii) one USX-Marathon Group Right (a "Marathon Right" and,
          together with the Steel Rights, the "Rights") was issued for each
          share of USX-Marathon Group Common Stock ("Marathon Stock" and,
          together with the Steel Stock, the "Voting Stock") to stockholders of
          record at the close of business on October 9, 1999, the day the
          previous rights expired.  Each of the new Rights entitle the
          registered holder to purchase from the Company one one-hundredth of a
          share of Series A Junior Preferred Stock, without par value, of the
          Company, at a price of $110 per one one-hundredth of a share, subject
          to adjustment.  The Rights generally will not become exercisable
          unless and until, among other things, any person acquires 15% or more
          of the voting power of the outstanding Voting Stock.  Like the
          existing plan, the new rights plan contains a "qualifying offer"
          feature that exempts fully financed all-cash tender offers for all
          outstanding Voting Stock that satisfy certain defined conditions.  The
          new Rights are redeemable under certain circumstances at $.01 per
          Right and will expire, unless earlier redeemed or extended, on October
          9, 2009.

          (c)On September 28, 1999, the registrant issued 67,133 shares of USX-
          Marathon Group Common Stock in connection with the purchase of certain
          oil and gas properties from two companies.  The value of the shares
          and the properties received in exchange was approximately $2.1
          million.  The shares were not registered under the Securities Act of
          1933.  Exemption from the registration provisions is based on Section
          4(2) of the Act, as a transaction not involving a public offering.
<PAGE> 91

Part II - Other Information (Continued):
- ---------------------------

Item 5.  OTHER INFORMATION (Continued)


     Marathon Group

      SUMMARIZED CONSOLIDATED FINANCIAL INFORMATION OF MARATHON OIL COMPANY
                               Supplementary Data
      ---------------------------------------------------------------------
                                   (Unaudited)


The following summarized consolidated financial information of Marathon Oil
Company, a wholly owned subsidiary of USX, is included in this Form 10-Q in
satisfaction of the reporting obligation of Marathon which has debt securities
registered under the Securities Exchange Act.  All such securities are
guaranteed by USX.
<TABLE>
<CAPTION>
                                                       (In millions)
                                             -------------------------------
                                                Third Quarter    Nine Months
                                                    Ended           Ended
                                                 September 30    September 30
                                                 1999    1998    1999     1998
                                                 ----    ----    ----     ----
<S>                                             <C>     <C>    <C>      <C>
INCOME DATA:
Revenues                                        $6,483  $5,593 $16,805  $16,619
Income from operations                             566     225   1,389    1,093
Net income                                         221      45     475      366
</TABLE>
<TABLE>
<CAPTION>
                                                         (In millions)
                                                    -----------------------
                                                   September 30 December 31
                                                       1999         1998
                                                       ----         ----
<S>                                                  <C>           <C>
BALANCE SHEET DATA:
Assets:
Current assets                                        $5,696        $4,742
Noncurrent assets                                     11,318        11,420
                                                      ------        ------
Total assets                                         $17,014       $16,162
                                                      ======        ======

Liabilities and Stockholder's Equity:
Current liabilities                                   $2,848        $2,543
Noncurrent liabilities                                 9,315         9,428
Preferred stock of subsidiary                             10            17
Minority interest in consolidated subsidiary           1,773         1,590
Stockholder's equity                                   3,068         2,584
                                                     -------       -------
Total liabilities and stockholder's equity           $17,014       $16,162
                                                     =======       =======
</TABLE>
<PAGE> 92

Part II - Other Information (Continued):
- ----------------------------------------

   Item 6.  EXHIBITS AND REPORTS ON FORM 8-K

   (a) EXHIBITS

               4. Rights Agreement, dated      Incorporated by reference
                  as of September 28, 1999,    to Exhibit 4 to USX's
                  between USX Corporation and  Form 8-K filed on
                  ChaseMellon.Shareholder      September 28, 1999.
                  Services, L.L.C.,            (File No. 1-5153).
                  as Rights Agent

              10  Form of Severance Agreements
                  between the Corporation and
                  various officers.

             12.1 Computation of Ratio of Earnings to
                  Combined Fixed Charges and Preferred
                  Stock Dividends

             12.2 Computation of Ratio of Earnings to Fixed Charges

               27.  Financial Data Schedule


   (b) REPORTS ON FORM 8-K

              Form 8-K dated September 28, 1999, reporting under Item 5. Other
          Events, the adoption of a new stockholder's rights plan.

              Form 8-K dated October 13, 1999, reporting under Item 5. Other
          Events, the retirement of Victor G. Beghini, president of Marathon Oil
          Company on October 31.

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 chief accounting officer thereunto duly authorized.

      USX CORPORATION


      By /s/ Kenneth L. Matheny
         Kenneth L. Matheny
          Vice President &
            Comptroller


November 10, 1999




September 1, 1999



                                September 1, 1999
Dear :

         USX Corporation (the "Corporation") recognizes that your contribution
to the growth and success of the Corporation will continue to be substantial and
desires to assure the Corporation of your continued employment.  In this
connection, the Board of Directors of the Corporation (the "Board') recognizes
that, as is the case with many publicly-held corporations, the possibility of a
change in control may exist and that such possibility, and the uncertainty and
questions which it may raise among management, may result in the departure or
distraction of management personnel to the detriment of the Corporation and its
stockholders.
         Accordingly, the Board has determined that appropriate steps should be
taken to reinforce and encourage the continued attention and dedication of
members of the Corporation's management, including yourself, to their assigned
duties without distraction in the face of potentially disturbing circumstances
arising from the possibility of a change in control of the Corporation.
         In order to induce you to remain in the employ of the Corporation, the
Corporation agrees that you shall receive the severance benefits set forth in
this letter agreement ("Agreement") in the event your employment with the
Corporation is terminated subsequent to a "Change in Control of the
Corporation" (as defined in Section 2 hereof) under the circumstances described
below.

         1.    Term of Agreement.  This Agreement will commence on the date
hereof and shall continue in effect until December 31, 2000; provided, however,
that commencing on January 1, 2001 and each January 1 thereafter, the term of
this Agreement shall automatically be extended for one additional year unless,
not later than September 1 of the preceding year, the Corporation shall have
given notice that it does not wish to extend this Agreement; provided, further,
if a Change in Control of the Corporation shall have occurred during the
original or extended term of this Agreement, this Agreement shall continue in
effect for a period of twenty-four (24) months beyond the month in which such
Change in Control of the Corporation occurred.

          2.  Change in Control of the Corporation.

          (a)  No benefits shall be payable hereunder unless there shall have
been a Change in Control of the Corporation, as set forth below.  For purposes
of this Agreement, a "Change in Control of the Corporation" and "Change in
Control" shall mean a change in control of a nature that would be required to be
reported in response to Item 6(e) of Schedule 14A of Regulation 14A promulgated
under the Securities Exchange Act of 1934, as amended (the "Exchange Act"),
whether or not the Corporation is then subject to such reporting requirement;
provided, that, without limitation, such a change in control shall be deemed to
have occurred if

              (i)  any person (as defined in Sections 13(d) and 14(d) of the
     Exchange Act) (a "Person") is or becomes the "beneficial owner" (as defined
     in Rule 13d-3 under the Exchange Act), directly or indirectly, of
     securities of the Corporation representing twenty percent (20%) or more of
     the combined voting power of the Corporation's then outstanding voting
     securities; provided, however, that for purposes of this Agreement the term
     "Person" shall not include (A) the Corporation or any of its subsidiaries,
     (B) a trustee or other fiduciary holding securities under an employee
     benefit plan of the Corporation or any of its subsidiaries, (C) an
     underwriter temporarily holding securities pursuant to an offering of such
     securities, or (D) a corporation owned, directly or indirectly, by the
     stockholders of the Corporation in substantially the same proportions as
     their ownership of stock of the Corporation; or

              (ii) the following individuals cease for any reason to constitute

     a majority of the number of directors then serving:  individuals who, on

     the date hereof, constitute the Board and any new director (other than a

     director whose initial assumption of office is in connection with an actual

     or threatened election contest including but not limited to a consent

     solicitation, relating to the election of directors of the Corporation)

     whose appointment or election by the Board or nomination for election by

     the Corporation's stockholders was approved by a vote of at least two-

     thirds (2/3) of the directors then still in office who either were

     directors on the date hereof or whose appointment, election or nomination

     for election was previously so approved; or

              (iii)there is consummated  a merger or consolidation of the

     Corporation or a subsidiary thereof with any other corporation, other than

     a merger or consolidation which would result in the holders of the voting

     securities of the Corporation outstanding immediately prior thereto holding

     securities which represent immediately after such merger or consolidation

     at least 50% of the combined voting power of the voting securities of the

     entity surviving the merger or consolidation (or the parent of such

     surviving entity), or the shareholders of the Corporation approve a plan of

     complete liquidation of the Corporation, or there is consummated the sale

     or other disposition of all or substantially all of the Corporation's

     assets.

          (b)  You agree that, subject to the terms and conditions of this

Agreement, in the event of a Change in Control of the Corporation, you will

remain in the employ of the Corporation for a period of three (3) months from

the occurrence of such Change in Control of the Corporation; provided, however,

that if during such three-month period (i) your employment is involuntarily

terminated by the Corporation other than for Cause, or (ii) you terminate your

employment during such three-month period for Good Reason, you shall not be

required to remain in the Corporation's employ.  The foregoing shall in no event

limit or otherwise affect your rights under any other provision of this

Agreement,

          (c)  For purposes of this Agreement, a "potential Change in Control of

the Corporation" shall be deemed to have occurred if

              (i)  the Corporation enters into an agreement, the consummation

     of which would result in the occurrence of a Change in Control of the

     Corporation;

              (ii) any person (including the Corporation) publicly announces an

     intention to take or to consider taking actions which if consummated would

     constitute a Change in Control of the Corporation;

              (iii)any Person, who is or becomes the beneficial owner, directly

     or indirectly, of securities of the Corporation representing 9.5% or more

     of the combined voting power of the Corporation's then outstanding

     securities, increases his beneficial ownership of such securities by 5% or

     more over the percentage so owned by such Person on the date hereof; or

              (iv) the Board adopts a resolution to the effect that, for

     purposes of this Agreement, a potential Change in Control of the

     Corporation has occurred.

You agree that, subject to the terms and conditions of this Agreement, in the

event of a potential Change in Control of the Corporation, you will remain in

the employ of the Corporation until the earliest of (i) a date which is six (6)

months from the occurrence of such potential Change in Control of the

Corporation, (ii) the termination by you of your employment by reason of your

death or Disability, as defined in Subsection 3(a), or (iii) a date which is

three (3) months from the occurrence of a Change in Control of the Corporation.

         3.    Termination Following a Change in Control of the Corporation.  If

any of the events described in section 2(a) hereof constituting a Change in

Control of the Corporation shall have occurred, you shall be entitled to the

benefits provided in Section 4(d) hereof upon the termination of your employment

during the term of this Agreement unless such termination is (i) because of your

death or Disability, (ii) by the Corporation for Cause, (iii) by you other than

for Good Reason or (iv) on or after the date that you attain age sixty-five

(65).  Notwithstanding the foregoing, if the Corporation shall have terminated

your employment at any time during the term of this Agreement for Cause, then

you shall be entitled only to the normal base salary and other employee benefits

provided in Section 4(b).  In the event your employment with the Corporation is

terminated for any reason prior to the occurrence of a Change in Control, you

shall not be entitled to any benefits hereunder; provided, however, that if your

employment is terminated prior to a Change in Control without Cause at the

direction of a person who has entered into an agreement with the Corporation,

the consummation of which will constitute a Change in Control, your employment

shall be deemed to have terminated following a Change in Control.  Your

entitlement to benefits under any of the Corporation's retirement plans will not

adversely affect your rights to receive payments hereunder.

               (a)  Disability.  If, as a result of your incapacity due to

physical or mental illness which in the opinion of a licensed physician renders

you incapable of performing your assigned duties with the Corporation, you shall

have been absent from the full-time performance of your duties with the

Corporation for six (6) consecutive months, and within thirty (30) days after

written notice of termination is given you shall not have returned to the full-

time performance of your duties, the Corporation may terminate your employment

for "Disability."

               (b)  Cause.  Termination by the Corporation of your employment

for "Cause" shall mean termination upon (i) the willful and continued failure by

you to substantially perform your duties with the Corporation (other than any

such failure resulting from termination by you for Good Reason), after a demand

for substantial performance is delivered to you that specifically identifies the

manner in which the Corporation believes that you have not substantially

performed your duties, and you have failed to resume substantial performance of

your duties on a continuous basis within fourteen (14) days of receiving such

demand, (ii) the willful engaging by you in conduct which is demonstrably and

materially injurious to the Corporation, monetarily or otherwise or (iii) your

conviction of a felony or conviction of a misdemeanor which impairs your ability

substantially to perform your duties with the Corporation.  For purposes of this

Subsection, no act, or failure to act, on your part shall be deemed "willful"

unless done, or omitted to be done, by you not in good faith and without

reasonable belief that your action or omission was in the best interest of the

Corporation.

               (c)  Good Reason.  You shall be entitled to terminate your

employment for Good Reason.  For purposes of this Agreement, "Good Reason" shall

mean, without your express written consent, the occurrence after a Change in

Control of the Corporation of any one or more of the following:

                (i) the assignment to you of duties inconsistent with your

position immediately prior to the Change in Control or a reduction or alteration

in the nature of your position, duties, status or responsibilities from those in

effect  immediately prior to the Change in Control;

                (ii)     a reduction by the Corporation in your base salary as

in effect on the date hereof (without regard to any temporary reduction effected

by the Corporation prior to a Change in Control) or as the same shall be

increased from time to time ("Base Salary") except for across-the-board

temporary salary reductions similarly affecting all senior executives of the

Corporation and all senior executives of any person in control of the

Corporation;

                (iii)    the Corporation's requiring you to be based at a

location in excess of seventy-five (75) miles from the location where you are

based immediately prior to the Change in Control;

                (iv)     the failure by the Corporation to continue in effect

any of the Corporation's employee benefit plans, programs, policies, practices

or arrangements in which you participate (or substantially equivalent successor

or replacement employee benefit plans, programs, policies, practices or

arrangements) or the failure by the Corporation to continue your participation

therein on substantially the same basis, both in terms of the amount of benefits

provided and the level of your participation relative to other participants, as

existed immediately prior to the Change in Control;

                 (v)     the failure of the Corporation to obtain a satisfactory

agreement from any successor to the Corporation to assume and agree to perform

this Agreement, as contemplated in Section 5 hereof; and

                 (vi)    any purported termination by the Corporation of your

employment that is not effected pursuant to a Notice of Termination satisfying

the requirements of subparagraph (d) below, and for purposes of this Agreement,

no such purported termination shall be effective.  Your right to terminate your

employment pursuant to this Subsection shall not be affected by your incapacity

due to physical or mental illness.  Your continued employment shall not

constitute consent to, or a waiver of rights with respect to, any circumstance

constituting Good Reason hereunder.

               (d)  Notice of Termination.  Any termination by the Corporation

for Cause or by you for Good Reason shall be communicated by Notice of

Termination to the other party hereto.  For purposes of this Agreement, a

"Notice of Termination" shall mean a written notice which shall indicate the

specific termination provision in this Agreement relied upon and shall set forth

in reasonable detail the facts and circumstances claimed to provide a basis for

termination of your employment under the provision so indicated.

               (e)  Date of Termination.  "Date of Termination" shall mean the

date specified in the Notice of Termination where required or in any other case

upon ceasing to perform services to the Corporation; provided that if within

thirty (30) days after any Notice of Termination one party notifies the other

party that a dispute exists concerning the termination, the Date of Termination

shall be the date finally determined to be the Date of Termination, either by

mutual written agreement of the parties or by a binding and final arbitration

award.

         4.    Compensation Upon Termination or During Disability.  Following a

Change in Control of the Corporation, as defined in Section 2 hereof, upon

termination of your employment or during a period of disability you shall be

entitled to the following benefits:

               (a)  During any period that you fail to perform your full-time

duties with the Corporation as a result of incapacity due to physical or mental

illness, you shall continue to receive your Base Salary at the rate in effect at

the commencement of any such period, until your employment is terminated

pursuant to Section 3(a) hereof.  Thereafter, your benefits shall be determined

in accordance with the Corporation's retirement, insurance and other applicable

programs and plans then in effect.

               (b)  If your employment shall be terminated by the Corporation

for Cause or by you other than for Good Reason, the Corporation shall pay you

your full Base Salary through the Date of Termination at the rate in effect at

the time Notice of Termination is given or on the Date of Termination if no

Notice of Termination is required hereunder, plus all other amounts to which you

are entitled under any compensation plan of the Corporation at the time such

payments are due, and the Corporation shall have no further obligations to you

under this Agreement.

               (c)  If your employment terminates by reason of your death, your

benefits shall be determined in accordance with the Corporation's retirement,

survivor's benefits, insurance and other applicable programs and plans, then in

effect.

               (d)  If your employment by the Corporation shall be terminated

(i) by the Corporation other than for Cause or Disability or (ii) by you for

Good Reason, you shall be entitled to the benefits (the "Severance Payments")

provided below:

                      (A)     the Corporation shall pay you your full Base

     Salary through the Date of Termination at the rate in effect at the time

     Notice of Termination is given, or the Date of Termination where no Notice

     of Termination is required hereunder;

                      (B)the Corporation will pay as severance benefits to you,

     not later than the fifth day following the Date of Termination, a lump sum

     severance payment (the "Severance Payment") equal to the product of (1) a

     fraction, the numerator of which is equal to the lesser of (x) thirty-six

     (36) or (y) the number of full and partial months existing between the Date

     of Termination and your sixty-fifth (65th) birthday and the denominator of

     which is equal to twelve (12), and (2) the sum of (x) your annual Base

     Salary in effect immediately prior to the occurrence of the circumstances

     giving rise to such termination, and (y) the amount, if any, of the highest

     annual bonus awarded to you under any annual bonus plan of the Corporation

     in the three (3) years immediately preceding the Date of Termination;

                      (C)     in lieu of shares of the class of common stock of

     the Corporation ("Option Shares") issuable to you upon exercise of

     outstanding options ("Options"), granted to you under any option or

     incentive plan of the Corporation (which Options shall be cancelled upon

     the making of the payment referred to below), you shall receive an amount

     in cash equal to the product of (i) the higher of the closing price of

     Option Shares reported on the New York Stock Exchange on the Date of

     Termination or the highest per share price for Option Shares actually paid

     in connection with any Change in Control of the Corporation, less the per

     share exercise price of each Option held by you, times (ii) the number of

     Option Shares covered by each such Option;

                      (D) for a twenty-four (24) month period after such

     termination, the Corporation will arrange to provide you at the

     Corporation's expense with life, disability, accident and health insurance

     benefits substantially similar to those which you were receiving

     immediately prior to the Notice of Termination; but benefits otherwise

     receivable by you pursuant to this Subsection (D) shall be reduced to the

     extent comparable benefits are actually received by you during the twenty-

     four (24) month period following your termination, and any such benefits

     actually received by you shall be reported to the Corporation;

                      (E)     in addition to the retirement benefits to which

     you are entitled under the United States Steel Corporation Plan for Non-

     Union Employee Pension Benefits, the USX Corporation Non-Tax Qualified

     Pension Plan, and the USX Corporation Executive Management Supplemental

     Pension Program or any successor plan or similar plans (the "Pension

     Plans") and the retiree medical, life and other similar benefits to which

     you are entitled under the Corporation's welfare benefit plans or any

     successor plan or plans thereto (the "Welfare Plans"), the Corporation

     shall pay you not later than the fifth day following the Date of

     Termination, a lump sum, in cash, equal to the actuarial equivalent of the

     excess of (x) the retirement pension and the medical, life and other

     benefits that would be payable to you if (i) you were terminated under

     conditions that entitled you to the highest benefit available under the

     Pension and Welfare Plans given your age, service and salary as of the Date

     of Termination and (ii) you had been absent due to layoff for a one-year

     period ending on the Date of Termination without regard to any amendment to

     the Pension or Welfare Plans made subsequent to a Change in Control of the

     Corporation and on or prior to the Date of Termination, which amendment

     adversely affects in any manner the computation of retirement or welfare

     benefits thereunder over (y) the retirement pension that you are entitled

     to receive under the Pension Plans and the medical, life and other benefits

     that you are entitled to receive under the Welfare Plans (for purposes of

     this Subsection, "actuarial equivalent" shall be determined using the same

     methods and assumptions utilized under the United States Steel Corporation

     Plan for Non-Union Employee Pension Benefits immediately prior to the

     Change in Control of the Corporation); and

                      (F)     In addition to the benefits you are entitled to

     under the USX Corporation Savings Fund Plan and/or the Marathon Thrift Plan

     and the related supplemental savings plans ("Savings Plans"), the

     Corporation shall pay you not later than the fifth day following the Date

     of Termination, a lump sum, in cash, equal to the excess of (x) the amount

     you would have been entitled to under the Savings Plans determined as if

     you were fully vested thereunder on the Date of Termination, over (y) the

     amount you are entitled to under the Savings Plans on the Date of

     Termination.

               (e)  In the event that you become entitled to the Severance

Payments, if any of the Severance Payments or other portion of the Total

Payments (as defined below) will be subject to the tax (the "Excise Tax")

imposed by section 4999 of the Internal Revenue Code of 1986, as amended (the

"Code"), the Corporation shall pay to you at the time specified in paragraph

(f), below, an additional amount (the "Gross-Up Payment") such that the net

amount retained by you, after deduction of any Excise Tax on the Severance

Payments and such other Total Payments and any federal, state and local income

tax, FICA-Health Insurance tax, and Excise Tax upon the payment provided for by

this paragraph, shall be equal to the Severance Payments and such other Total

Payments.  For purposes of determining whether any of the payments will be

subject to the Excise Tax and the amount of such Excise Tax, (i) any other

payments or benefits received or to be received by you in connection with a

Change in Control of the Corporation or your termination of employment whether

pursuant to the terms of this Agreement or any other plan, arrangement or

agreement with the Corporation, any person whose actions result in a Change in

Control of the Corporation or any person affiliated with the Corporation or such

person (together with the Severance Payment, the "Total Payments") shall be

treated as "parachute payments" within the meaning of section 280G(b)(2) of the

Code, and all "excess parachute payments" within the meaning of section

280G(b)(1) shall be treated as subject to the Excise Tax, except to the extent

that in the opinion of tax counsel selected by the Corporation's independent

auditors and acceptable to you such other payments or benefits (in whole or in

part) do not constitute parachute payments, or such excess parachute payments

(in whole or in part) represent reasonable compensation for services actually

rendered within the meaning of section 280G(b)(4) of the Code in excess of the

base amount within the meaning of section 280G(b)(3) of the Code, or are

otherwise not subject to the Excise Tax, (ii) the amount of the Total Payments

which shall be treated as subject to the Excise Tax shall be equal to the lesser

of (A) the total amount of the Total Payments or (B) the amount of excess

parachute payments within the meaning of section 280G(b)(1) (after applying

clause (i), above), and (iii) the value of any non-cash benefits or any deferred

payment or benefit shall be determined by the Corporation's independent auditors

in accordance with the principles of sections 280G(d)(3) and (4) of the Code.

For purposes of determining the amount of the Gross-Up Payment, you shall be

deemed to pay federal income taxes at the highest marginal rate of federal

income taxation in the calendar year in which the Gross-Up Payment is to be made

and state and local income taxes at the highest marginal rate of taxation in the

state and locality of your residence on the Date of Termination, net of the

maximum reduction in federal income taxes which could be obtained from deduction

of such state and local taxes.  In the event that the Excise Tax is subsequently

determined to be less than the amount taken into account hereunder at the time

of termination of your employment, you shall repay to the Corporation at the

time that the amount of such reduction in Excise Tax is finally determined the

portion of the Gross-Up Payment attributable to such reduction (plus the portion

of the Gross-Up Payment attributable to the Excise Tax, and federal and state

and local income tax , and FICA-Health Insurance tax imposed on the portion of

the Gross-Up Payment being repaid by you if such repayment results in a

reduction in Excise Tax or FICA-Health Insurance tax, and/or a federal and state

and local income tax deduction) plus interest on the amount of such repayment at

the rate provided in section 1274(b)(2)(B) of the Code.  In the event that the

Excise Tax is determined to exceed the amount taken into account hereunder at

the time of the termination of your employment (including by reason of any

payment the existence or amount of which cannot be determined at the time of the

Gross-Up Payment), the Corporation shall make an additional gross-up payment in

respect of such excess (plus any interest payable with respect to such excess)

at the time that the amount of such excess is finally determined.

               (f)  The payments provided for in paragraphs (d) and (e) above

shall be made not later than the fifth day following the Date of Termination;

provided, however, that if the amounts of such payments cannot be finally

determined on or before such day, the Corporation shall pay to you on such day

an estimate as determined in good faith by the Corporation of the minimum amount

of such payments and shall pay the remainder of such payments (together with

interest at the rate provided in section 1274(b)(2)(B) of the Code) as soon as

the amount thereof can be determined but in no event later than the thirtieth

day after the Date of Termination.  In the event that the amount of the

estimated payments exceeds the amount subsequently determined to have been due,

such excess shall constitute a loan by the Corporation to you payable on the

fifth day after demand by the Corporation (together with interest at the rate

provided in section 1274(b)(2)(B) of the Code).

              (g)   The Corporation shall also pay to you all legal fees and

expenses incurred by you as a result of such termination of employment

(including all such fees and expenses, if any, incurred in contesting or

disputing any such termination or in seeking to obtain or enforce any right or

benefit provided by this Agreement or in connection with any tax audit or

proceeding to the extent attributable to the application of section 4999 of the

Code to any payment or benefit provided hereunder).

              (h)   You shall not be required to mitigate the amount of any

payment provided for in this Section 4 by seeking other employment or otherwise,

nor shall the amount of any payment provided for in this Section 4 be reduced by

any compensation earned by you as the result of employment by another employer

after the Date of Termination, or otherwise.

         5.    Successors; Binding Agreement.

              (a)   The Corporation will require any successor (whether direct

or indirect, by purchase, merger, consolidation or otherwise) to all or

substantially all of the business and/or assets of the Corporation or of any

division or subsidiary thereof employing you to expressly assume and agree to

perform this Agreement in the same manner and to the same extent that the

Corporation would be required to perform it if no such succession had taken

place.  Failure of the Corporation to obtain such assumption and agreement prior

to the effectiveness of any such succession shall be a breach of this Agreement

and shall entitle you to compensation from the Corporation in the same amount

and on the same terms as you would be entitled hereunder if you terminate your

employment for Good Reason, except that for purposes of implementing the

foregoing, the date on which any such succession becomes effective shall be

deemed the Date of Termination.

              (b)   This Agreement shall inure to the benefit of and be

enforceable by your personal or legal representatives, executors,

administrators, successors, heirs, distributees, devisees and legatees.  If you

should die while any amount would still be payable to you hereunder if you had

continued to live, all such amounts, unless otherwise provided herein, shall be

paid in accordance with the terms of this Agreement, to your devisee, legatee or

other designee or, if there is not such designee, to your estate.

          6.   Notice.  For the purpose of this Agreement, notices and all other

 communications provided for in the Agreement shall be in writing and shall be

 deemed to have been duly given when delivered or mailed by United States

 registered mail, return receipt requested, postage prepaid, addressed to the

 respective addresses set forth on the first page of this Agreement.

          7.   Miscellaneous.  No provision of this Agreement may be modified,

 waived or discharged unless such waiver, modification or discharge is agreed to

 in writing and signed by you and such officer as may be specifically designated

 by the Board.  The validity, interpretation, construction and performance of

 this Agreement shall be governed by the laws of the State of Delaware.

          8.   Validity.  The invalidity or unenforceability of any provision of

 this Agreement shall not affect the validity or enforceability of any other

 provision of this Agreement, which shall remain in full force and effect.

          9.   Counterparts.  This Agreement may be executed in several

 counterparts, each of which shall be deemed to be an original but all of which

 together will constitute one and the same instrument.

          10.  Claims and Arbitration.  Any dispute or controversy arising under

or in connection with this Agreement shall be settled exclusively by arbitration

in accordance with the rules of the American Arbitration Association then in

effect.  Judgment may be entered on the arbitrator's award in any court having

jurisdiction; provided, however, that you shall be entitled to seek specific

performance of your right to be paid until the Date of Termination during the

pendency of any dispute or controversy arising under or in connection with this

Agreement.

         11.   Entire Agreement.  This Agreement supersedes any other agreement

or understanding between the parties hereto with respect to the issues that are

the subject matter of this Agreement.

         12.   Effective Date.  This Agreement shall become effective as of the

date set forth above.  If this letter sets forth our agreement on the subject

matter hereof, kindly sign and return to the Corporation the enclosed copy of

this letter which will then constitute our agreement on this subject.

                                   Sincerely,

                             USX CORPORATION



                             By____________________________

                                  Dan D. Sandman
                                  General Counsel, Secretary
                                  and Senior Vice President-
                                  Human Resources & Public Affairs


Agreed to this ______ day of
September, 1999.

By_______________________



                                                                 Exhibit 12.1(a)
<TABLE>
<CAPTION>

                                 USX CORPORATION
           COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES
                          AND PREFERRED STOCK DIVIDENDS
                      TOTAL ENTERPRISE BASIS - (Unaudited)
           ----------------------------------------------------------
                              (Dollars in Millions)


                                Nine Months    Six Months   Three Months
                                   Ended         Ended         Ended
                                  Sept 30       June 30       March 31
                                 1999 1998*   1999*1998*    1999* 1998*
                                 ----  ----    ---- ----     ----  ----

<S>                             <C>   <C>      <C>           <C>   <C>
Portion of rentals
  representing interest           $75   $76     $49  $50      $25   $26
Capitalized interest               24    35      19   23       10    10
Other interest and fixed
   charges                        247   233     163  145       82    72
Pretax earnings which would
   be required to cover
   preferred stock dividend
   requirements of parent          11    11       8    8        4     4
                                 ----  ----    ---- ----     ----  ----

Combined fixed charges
  and preferred stock
   dividends (A)                 $357  $355    $239 $226     $121  $112
                                 ====  ====    ==== ====     ====  ====

Earnings-pretax income
   with applicable
   adjustments (B)              $1609 $1632    $987$1260     $455  $578
                                 ====  ====    ==== ====     ====  ====

Ratio of (B) to (A)              4.51  4.60    4.13 5.58     3.76  5.16
                                 ====  ====    ==== ====     ====  ====
<FN>
Note - Fixed charges consist of interest expense on indebtedness whether
expensed or capitalized (including amortization of debt expense and discount or
premium relating to indebtedness) and one-third of rental expense that is
representative of the interest factor.



*Restated in September 1999.
</TABLE>
<TABLE>
<CAPTION>
                                                                 Exhibit 12.1(b)


                                 USX CORPORATION
           COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES
                          AND PREFERRED STOCK DIVIDENDS
                      TOTAL ENTERPRISE BASIS - (Unaudited)
                              CONTINUING OPERATIONS
           ----------------------------------------------------------
                              (Dollars in Millions)


                                      Year Ended December 31*
                                  --------------------------------
                                 1998    1997   1996    1995  1994
                                 ----    ----   ----    ----  ----
<S>                             <C>     <C>    <C>      <C>  <C>
Portion of rentals
   representing interest         $105     $82    $78     $76   $83
Capitalized interest               46      31     11      13    58
Other interest and fixed
   charges                        320     294    364     432   424
Pretax earnings which would
   be required to cover
   preferred stock dividend
   requirements of parent          15      20     37      46    49
                                 ----    ----   ----    ----  ----
Combined fixed charges
   and preferred stock
   dividends (A)                 $486    $427   $490    $567  $614
                                 ====    ====   ====    ====  ====
Earnings-pretax income
   with applicable
   adjustments (B)              $1675   $1700  $1823    $855 $1257
                                 ====    ====   ====    ====  ====

Ratio of (B) to (A)              3.45    3.98   3.72    1.51  2.05
                                 ====    ====   ====    ====  ====


<FN>
Note - Fixed charges consist of interest expense on indebtedness whether
expensed or capitalized (including amortization of debt expense and discount or
premium relating to indebtedness) and one-third of rental expense that is
representative of the interest factor.


*Restated in 1999.


</TABLE>

                                                                 Exhibit 12.2(a)
<TABLE>
<CAPTION>

                                 USX CORPORATION
                COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
                      TOTAL ENTERPRISE BASIS - (Unaudited)
           ----------------------------------------------------------
                              (Dollars in Millions)


                                Nine Months    Six Months   Three Months
                                   Ended         Ended         Ended
                                  Sept 30       June 30       March 31
                                 1999 1998*   1999*1998*    1999* 1998*
                                 ----  ----    ---- ----     ----  ----
<S>                             <C>   <C>      <C>           <C>   <C>
Portion of rentals
  representing interest           $75   $76     $49  $50      $25   $26
Capitalized interest               24    35      19   23       10    10
Other interest and fixed
   charges                        247   233     163  145       82    72
                                 ----  ----    ---- ----     ----  ----
Total fixed charges (A)          $346  $344    $231 $218     $117  $108
                                 ====  ====    ==== ====     ====  ====
Earnings-pretax income
   with applicable
   adjustments (B)              $1609 $1632    $987$1260     $455  $578
                                 ====  ====    ==== ====     ====  ====
Ratio of (B) to (A)              4.65  4.74    4.27 5.78     3.89  5.35
                                 ====  ====    ==== ====     ====  ====


<FN>
Note - Fixed charges consist of interest expense on indebtedness whether
expensed or capitalized (including amortization of debt expense and discount or
premium relating to indebtedness) and one-third of rental expense that is
representative of the interest factor.






*Restated in September 1999.
</TABLE>
<TABLE>
<CAPTION>
                                                                 Exhibit 12.2(b)


                                 USX CORPORATION
                COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
                      TOTAL ENTERPRISE BASIS - (Unaudited)
                              CONTINUING OPERATIONS
           ----------------------------------------------------------
                              (Dollars in Millions)


                                      Year Ended December 31*
                                  --------------------------------
                                 1998    1997   1996    1995  1994
                                 ----    ----   ----    ----  ----
<S>                             <C>     <C>    <C>      <C>  <C>
Portion of rentals
   representing interest         $105     $82    $78     $76   $83
Capitalized interest               46      31     11      13    58
Other interest and fixed
   charges                        320     294    364     432   424
                                 ----    ----   ----    ----  ----
Total fixed charges (A)          $471    $407   $453    $521  $565
                                 ====    ====   ====    ====  ====
Earnings-pretax income
   with applicable
   adjustments (B)              $1675   $1700  $1823    $855 $1257
                                 ====    ====   ====    ====  ====

Ratio of (B) to (A)              3.56    4.18   4.02    1.64  2.22
                                 ====    ====   ====    ====  ====










<FN>
Note - Fixed charges consist of interest expense on indebtedness whether
expensed or capitalized (including amortization of debt expense and discount or
premium relating to indebtedness) and one-third of rental expense that is
representative of the interest factor.





*Restated in 1999.
</TABLE>


<TABLE> <S> <C>

<ARTICLE> 5

<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               SEP-30-1999
<CASH>                                              93
<SECURITIES>                                         0
<RECEIVABLES>                                     2161
<ALLOWANCES>                                         9
<INVENTORY>                                       2638
<CURRENT-ASSETS>                                  5336
<PP&E>                                           29416
<DEPRECIATION>                                   16729
<TOTAL-ASSETS>                                   22150
<CURRENT-LIABILITIES>                             3907
<BONDS>                                           4040
                              182
                                          3
<COMMON>                                           398<F1>
<OTHER-SE>                                        6278
<TOTAL-LIABILITY-AND-EQUITY>                     22150
<SALES>                                          20636
<TOTAL-REVENUES>                                 20630
<CGS>                                            19195
<TOTAL-COSTS>                                    19195
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 266
<INCOME-PRETAX>                                    764
<INCOME-TAX>                                       266
<INCOME-CONTINUING>                                498
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      5
<CHANGES>                                            0
<NET-INCOME>                                       493
<EPS-BASIC>                                        0<F2>
<EPS-DILUTED>                                        0<F3>
<FN>
<F1>Consists of Marathon Stock issued, 310; Steel Stock issued, $88.
<F2>Basic earnings (loss) per share applicable to Marathon Stock, $1.56; Steel
Stock, $.04.
<F3>Diluted earnings (loss) per share applicable to Marathon Stock, $1.56; Steel
Stock, $.04.
</FN>


</TABLE>


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