<TABLE> <S> <C>
<ARTICLE> 5
<MULTIPLIER> 1,000,000
<S> <C>
<PERIOD-TYPE> 3-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> APR-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 167
<SECURITIES> 0
<RECEIVABLES> 3000
<ALLOWANCES> 15
<INVENTORY> 2892
<CURRENT-ASSETS> 6656
<PP&E> 29909
<DEPRECIATION> 17163
<TOTAL-ASSETS> 23783
<CURRENT-LIABILITIES> 4701
<BONDS> 3830
183
2
<COMMON> 401<F1>
<OTHER-SE> 6980
<TOTAL-LIABILITY-AND-EQUITY> 23783
<SALES> 10432
<TOTAL-REVENUES> 10488
<CGS> 7848
<TOTAL-COSTS> 9516
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 92
<INCOME-PRETAX> 677
<INCOME-TAX> 254
<INCOME-CONTINUING> 423
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 423
<EPS-BASIC> 0<F2>
<EPS-DILUTED> 0<F3>
<FN>
<F1>Consists of Marathon Stock issued, $312 million; Steel Stock issued $89
million.
<F2>Basic Earning Per Share applicable to Marathon Stock, $1.18; Steel Stock, $.62
<F3>Diluted Earnings Per Share applicable to Marathon Stock, $1.18; Steel Stock,
$.62
</FN>
</TABLE>