<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE ARTHUR
J. GALLAGHER & CO. CONSOLIDATED FINANCIAL STATEMENTS INCLUDED IN THE FORM 10-Q
FOR THE THREE-MONTH PERIOD ENDED MARCH 31, 2000 AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000

                                                  
<PERIOD-TYPE>                   3-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000             DEC-31-1999
<PERIOD-START>                             JAN-01-2000             JAN-01-1999
<PERIOD-END>                               MAR-31-2000             MAR-31-1999
<CASH>                                         179,096                 145,207
<SECURITIES>                                    64,136                  57,874
<RECEIVABLES>                                  325,058                 259,146
<ALLOWANCES>                                       918                     968
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                               604,696                 503,369
<PP&E>                                         117,439                 103,812
<DEPRECIATION>                                  80,125                  70,110
<TOTAL-ASSETS>                                 848,551                 725,196
<CURRENT-LIABILITIES>                          580,296                 508,636
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                        37,216                  36,376
<OTHER-SE>                                     214,408                 167,637
<TOTAL-LIABILITY-AND-EQUITY>                   848,551                 725,196
<SALES>                                        146,282                 132,921
<TOTAL-REVENUES>                               152,270                 137,608
<CGS>                                           82,066                  75,265
<TOTAL-COSTS>                                   82,066                  75,265
<OTHER-EXPENSES>                                46,600                  41,606
<LOSS-PROVISION>                                   156                   (110)
<INTEREST-EXPENSE>                                 133                     222
<INCOME-PRETAX>                                 23,315                  20,625
<INCOME-TAX>                                     8,160                   7,149
<INCOME-CONTINUING>                             15,155                  13,476
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    15,155                  13,476
<EPS-BASIC>                                        .41                     .37
<EPS-DILUTED>                                      .39                     .35