<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED STATEMENT OF OPERATIONS AND THE CONSOLIDATED BALANCE SHEET AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 171
<SECURITIES> 0
<RECEIVABLES> 3051
<ALLOWANCES> 16
<INVENTORY> 2886
<CURRENT-ASSETS> 6677
<PP&E> 29960
<DEPRECIATION> 17242
<TOTAL-ASSETS> 23870
<CURRENT-LIABILITIES> 5159
<BONDS> 3128
183
2
<COMMON> 401<F1>
<OTHER-SE> 6989
<TOTAL-LIABILITY-AND-EQUITY> 23870
<SALES> 30425
<TOTAL-REVENUES> 30675
<CGS> 23324
<TOTAL-COSTS> 28298
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 267
<INCOME-PRETAX> 1737<F2>
<INCOME-TAX> 877
<INCOME-CONTINUING> 860
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 860
<EPS-BASIC> 0<F3>
<EPS-DILUTED> 0<F4>
<FN>
<F1>Consists of Marathon Stock issued, $312 million; Steel Stock issued, $89
million.
<F2>Net of minority interest of $373 million.
<F3>Basic Earnings Per Share applicable to Marathon Stock, $2.38; Steel Stock,
$1.27
<F4>Diluted Earnings Per Share applicable to Marathon Stock, $2.37; Steel Stock,
$1.27
</FN>
</TABLE>