<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 SIX-MONTH PERIOD ENDED JUNE 30, 2000 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000

                                                  
<PERIOD-TYPE>                   6-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000             DEC-31-1999
<PERIOD-START>                             JAN-01-2000             JAN-01-1999
<PERIOD-END>                               JUN-30-2000             JUN-30-1999
<CASH>                                         179,757                 156,142
<SECURITIES>                                    64,949                  60,341
<RECEIVABLES>                                  386,901                 329,797
<ALLOWANCES>                                       892                     951
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                               674,968                 588,030
<PP&E>                                         122,050                 108,771
<DEPRECIATION>                                  83,250                  73,481
<TOTAL-ASSETS>                                 928,751                 820,422
<CURRENT-LIABILITIES>                          642,744                 587,888
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                        38,151                  37,073
<OTHER-SE>                                     231,676                 178,725
<TOTAL-LIABILITY-AND-EQUITY>                   928,751                 820,422
<SALES>                                        299,106                 269,631
<TOTAL-REVENUES>                               312,697                 284,250
<CGS>                                          167,799                 153,584
<TOTAL-COSTS>                                  167,799                 153,584
<OTHER-EXPENSES>                                97,545                  89,364
<LOSS-PROVISION>                                   797                   (180)
<INTEREST-EXPENSE>                                 274                     685
<INCOME-PRETAX>                                 46,282                  40,797
<INCOME-TAX>                                    16,199                  13,954
<INCOME-CONTINUING>                             30,083                  26,843
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    30,083                  26,843
<EPS-BASIC>                                        .80                     .73
<EPS-DILUTED>                                      .75                     .69