<ARTICLE>                     5
<LEGEND>

This  schedule  contains  summary  financial   information  extracted  from  the
consolidated  Marsh & McLennan  Companies,  Inc. and subsidiaries March 31, 2000
financial  statements  and is  qualified  in its  entirety by  reference to such
financial statements.

</LEGEND>



                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                              MAR-31-2000
<PERIOD-END>                                   MAR-31-2000
<CASH>                                         507,000,000
<SECURITIES>                                             0
<RECEIVABLES>                                2,746,000,000
<ALLOWANCES>                                   135,000,000
<INVENTORY>                                              0
<CURRENT-ASSETS>                             3,657,000,000
<PP&E>                                       2,273,000,000
<DEPRECIATION>                                 946,000,000
<TOTAL-ASSETS>                              13,419,000,000
<CURRENT-LIABILITIES>                        4,457,000,000
<BONDS>                                      2,351,000,000
<PREFERRED-MANDATORY>                                    0
<PREFERRED>                                              0
<COMMON>                                       270,000,000
<OTHER-SE>                                   4,179,000,000
<TOTAL-LIABILITY-AND-EQUITY>                13,419,000,000
<SALES>                                                  0
<TOTAL-REVENUES>                             2,665,000,000
<CGS>                                                    0
<TOTAL-COSTS>                                2,053,000,000
<OTHER-EXPENSES>                                         0
<LOSS-PROVISION>                                 1,700,000
<INTEREST-EXPENSE>                              60,000,000
<INCOME-PRETAX>                                557,000,000
<INCOME-TAX>                                   220,000,000
<INCOME-CONTINUING>                            337,000,000
<DISCONTINUED>                                           0
<EXTRAORDINARY>                                          0
<CHANGES>                                                0
<NET-INCOME>                                   337,000,000
<EPS-BASIC>                                           1.26
<EPS-DILUTED>                                         1.19