<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE OM
GROUP, INC. CONDENSED CONSOLIDATED BALANCE SHEET AT SEPTEMBER 30, 2000
(UNAUDITED) AND THE OM GROUP, INC. CONDENSED STATEMENT OF CONSOLIDATED INCOME
FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2000 (UNAUDITED) AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 9-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-2000
<PERIOD-END> SEP-30-2000 SEP-30-2000
<CASH> 15,713 15,713
<SECURITIES> 0 0
<RECEIVABLES> 138,486 138,486
<ALLOWANCES> 0 0
<INVENTORY> 373,569 373,569
<CURRENT-ASSETS> 614,457 614,457
<PP&E> 592,551 592,551
<DEPRECIATION> 135,124 135,124
<TOTAL-ASSETS> 1,307,915 1,307,915
<CURRENT-LIABILITIES> 151,760 151,760
<BONDS> 0 0
0 0
0 0
<COMMON> 240 240
<OTHER-SE> 489,219 489,219
<TOTAL-LIABILITY-AND-EQUITY> 1,307,915 1,307,915
<SALES> 233,384 655,191
<TOTAL-REVENUES> 233,384 655,191
<CGS> 176,554 500,959
<TOTAL-COSTS> 195,855 553,709
<OTHER-EXPENSES> (633) (1,379)
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 11,677 28,722
<INCOME-PRETAX> 26,485 74,139
<INCOME-TAX> 7,858 21,934
<INCOME-CONTINUING> 18,627 52,205
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 18,627 52,205
<EPS-BASIC> .78 2.19
<EPS-DILUTED> .77 2.15
</TABLE>