<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
QUARTERLY REPORT ON FORM 10-Q OF CMGI, INC. FOR THE QUARTER ENDED APRIL 30, 1999
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          JUL-31-1999
<PERIOD-START>                             AUG-01-1998
<PERIOD-END>                               APR-30-1999
<CASH>                                          41,758
<SECURITIES>                                   886,242
<RECEIVABLES>                                   30,216
<ALLOWANCES>                                         0
<INVENTORY>                                      9,028
<CURRENT-ASSETS>                               995,835
<PP&E>                                          17,885
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                               1,246,582
<CURRENT-LIABILITIES>                          400,555
<BONDS>                                              0
<PREFERRED-MANDATORY>                           35,305
<PREFERRED>                                          0
<COMMON>                                           953
<OTHER-SE>                                     689,740
<TOTAL-LIABILITY-AND-EQUITY>                 1,246,582
<SALES>                                        120,032
<TOTAL-REVENUES>                               120,032
<CGS>                                          114,917
<TOTAL-COSTS>                                  114,917
<OTHER-EXPENSES>                                80,379
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               3,295
<INCOME-PRETAX>                                 55,296
<INCOME-TAX>                                    30,981
<INCOME-CONTINUING>                             24,315
<DISCONTINUED>                                   (806)
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    23,509
<EPS-BASIC>                                     0.25
<EPS-DILUTED>                                     0.22