<TABLE> <S> <C>

<ARTICLE> 5 
<LEGEND>
This schedule contains summary financial information extracted from the OM
Group, Inc. Condensed Consolidated Balance Sheets at June 30, 1997 (Unaudited)
and the OM Group, Inc. Statements of Consolidated Income for the three and six
months ended June 30, 1997 (Unaudited) and is qualified in its entirety by
reference to such financial statements.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
                                              
<S>                             <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997
<PERIOD-END>                               JUN-30-1997             JUN-30-1997
<CASH>                                           8,917                   8,917
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   75,156                  75,156
<ALLOWANCES>                                         0                       0
<INVENTORY>                                    254,564                 254,564
<CURRENT-ASSETS>                               346,282                 346,282
<PP&E>                                         206,990                 206,990
<DEPRECIATION>                                  65,297                  65,297
<TOTAL-ASSETS>                                 614,770                 614,770
<CURRENT-LIABILITIES>                          115,537                 115,537
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           222                     222
<OTHER-SE>                                     285,813                 285,813
<TOTAL-LIABILITY-AND-EQUITY>                   614,770                 614,770
<SALES>                                        124,334                 234,389
<TOTAL-REVENUES>                               124,334                 234,389
<CGS>                                           94,851                 178,328
<TOTAL-COSTS>                                  106,465                 200,824
<OTHER-EXPENSES>                                 (106)                   (412)
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               3,488                   7,154
<INCOME-PRETAX>                                 14,487                  26,823
<INCOME-TAX>                                     4,908                   9,028
<INCOME-CONTINUING>                              9,579                  17,795
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     9,579                  17,795
<EPS-PRIMARY>                                      .46                     .90
<EPS-DILUTED>                                      .44                     .87
        

</TABLE>