<TABLE> <S> <C>
<PAGE>
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
UNAUDITED INTERIM CONSOLIDATED FINANCIAL STATEMENTS AND RELATED NOTES AND
MANAGEMENT DISCUSSION AND ANALYSIS CONTAINED IN THE REPORT ON FORM 10-Q FILED BY
SILICON VALLEY BANCSHARES FOR THE SIX MONTHS ENDED 6/30/2000 AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 346,108
<INT-BEARING-DEPOSITS> 546
<FED-FUNDS-SOLD> 1,203,233
<TRADING-ASSETS> 0
<INVESTMENTS-HELD-FOR-SALE> 2,184,348
<INVESTMENTS-CARRYING> 0
<INVESTMENTS-MARKET> 0
<LOANS> 1,598,534
<ALLOWANCE> 13,800
<TOTAL-ASSETS> 5,393,225
<DEPOSITS> 4,845,222
<SHORT-TERM> 0
<LIABILITIES-OTHER> 73,257
<LONG-TERM> 0
0
0
<COMMON> 46
<OTHER-SE> 436,137
<TOTAL-LIABILITIES-AND-EQUITY> 5,393,225
<INTEREST-LOAN> 91,382
<INTEREST-INVEST> 53,660
<INTEREST-OTHER> 34,900
<INTEREST-TOTAL> 179,942
<INTEREST-DEPOSIT> 26,544
<INTEREST-EXPENSE> 26,544
<INTEREST-INCOME-NET> 153,398
<LOAN-LOSSES> 23,630
<SECURITIES-GAINS> 32,133
<EXPENSE-OTHER> 96,519
<INCOME-PRETAX> 148,978
<INCOME-PRE-EXTRAORDINARY> 88,390
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 88,390
<EPS-BASIC> 1.95<F1>
<EPS-DILUTED> 1.85<F2>
<YIELD-ACTUAL> .068
<LOANS-NON> 26,817
<LOANS-PAST> 62
<LOANS-TROUBLED> 0
<LOANS-PROBLEM> 0
<ALLOWANCE-OPEN> 76,800
<CHARGE-OFFS> 27,512
<RECOVERIES> 5,882
<ALLOWANCE-CLOSE> 73,800
<ALLOWANCE-DOMESTIC> 54,238
<ALLOWANCE-FOREIGN> 0
<ALLOWANCE-UNALLOCATED> 19,562
<FN>
<F1>REPRESENTS BASIC EARNINGS PER SHARE
<F2>REPRESENTS DILUTED EARNINGS PER SHARE
</FN>
</TABLE>
