<ARTICLE> 5
<LEGEND> This schedule contains summary financial information extracted from
the Arthur J. Gallagher & Co. Consolidated Financial Statements included in
Amendment No. 1 to the Form 10-Q/A for the three month period ended March 31,
1999 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-31-1999              DEC-31-1998
<PERIOD-START>                            JAN-01-1999              JAN-01-1998
<PERIOD-END>                              MAR-31-1999              MAR-31-1998
<CASH>                                        143,386                  160,235
<SECURITIES>                                   57,874                   64,968
<RECEIVABLES>                                 257,857                  200,018
<ALLOWANCES>                                      963                    1,622
<INVENTORY>                                         0                        0
<CURRENT-ASSETS>                              499,853                  464,912
<PP&E>                                        101,572                   93,126
<DEPRECIATION>                                 68,567                   64,423
<TOTAL-ASSETS>                                720,438                  655,266
<CURRENT-LIABILITIES>                         504,097                  452,333
<BONDS>                                             0                        0
<PREFERRED-MANDATORY>                               0                        0
<PREFERRED>                                         0                        0
<COMMON>                                       17,990                   17,929
<OTHER-SE>                                    185,896                  168,598
<TOTAL-LIABILITY-AND-EQUITY>                  720,438                  655,266
<SALES>                                       130,482                  121,265
<TOTAL-REVENUES>                              135,115                  128,517
<CGS>                                          73,714                   69,386
<TOTAL-COSTS>                                  73,714                   69,386
<OTHER-EXPENSES>                               40,893                   41,091
<LOSS-PROVISION>                                (107)                     (72)
<INTEREST-EXPENSE>                                197                      264
<INCOME-PRETAX>                                20,418                   17,848
<INCOME-TAX>                                    7,146                    5,874
<INCOME-CONTINUING>                            13,272                   11,974
<DISCONTINUED>                                      0                        0
<EXTRAORDINARY>                                     0                        0
<CHANGES>                                           0                        0
<NET-INCOME>                                   13,272                   11,974
<EPS-BASIC>                                       .73                      .68
<EPS-DILUTED>                                     .70                      .65