<ARTICLE>                     BD

<LEGEND>
THE SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE CONSOLIDATED STATEMENT OF
FINANCIAL CONDITION AND THE CONSOLIDATED STATEMENT OF OPERATIONS AS OF JUNE 30,
2000 AND FOR THE SIX MONTHS THEN ENDED AND THE NOTES THERETO AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS FILED IN THE 1999
INVESTMENT TECHNOLOGY GROUP, INC. ANNUAL 10-K FILING.
</LEGEND>

<CIK>                         0000920424
<NAME>                        Investment Technology Group, Inc.
<MULTIPLIER>                                   1,000

                             
<PERIOD-TYPE>                                  6-MOS
<FISCAL-YEAR-END>                              DEC-31-2000
<PERIOD-START>                                 JAN-01-2000
<PERIOD-END>                                   JUN-30-2000
<CASH>                                         92,195
<RECEIVABLES>                                  28,862
<SECURITIES-RESALE>                            0
<SECURITIES-BORROWED>                          0
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<TOTAL-ASSETS>                                 381,713
<SHORT-TERM>                                   0
<PAYABLES>                                     125,985
<REPOS-SOLD>                                   0
<SECURITIES-LOANED>                            0
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<COMMON>                                       334
<OTHER-SE>                                     166,998
<TOTAL-LIABILITY-AND-EQUITY>                   381,713
<TRADING-REVENUE>                              (874)
<INTEREST-DIVIDENDS>                           3,407
<COMMISSIONS>                                  153,418
<INVESTMENT-BANKING-REVENUES>                  0
<FEE-REVENUE>                                  2,622
<INTEREST-EXPENSE>                             86
<COMPENSATION>                                 38,759
<INCOME-PRETAX>                                59,928
<INCOME-PRE-EXTRAORDINARY>                     59,928
<EXTRAORDINARY>                                0
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<EPS-BASIC>                                    1.09
<EPS-DILUTED>                                  1.07