<TABLE> <S> <C>
<PAGE>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS INCLUDED IN THE COMPANY'S SEMI-ANNUAL REPORT. AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 1
<NAME> WEITZ SERIES FUND, INC.
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2001
<PERIOD-START> APR-01-2000
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 2,553,765,936
<INVESTMENTS-AT-VALUE> 2,878,911,175
<RECEIVABLES> 36,189,206
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2,915,100,381
<PAYABLE-FOR-SECURITIES> 15,434,126
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,838,041
<TOTAL-LIABILITIES> 18,272,167
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2,465,999,371
<SHARES-COMMON-STOCK> 86,700,879
<SHARES-COMMON-PRIOR> 77,216,345
<ACCUMULATED-NII-CURRENT> 20,074,597
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 85,609,007
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 325,145,239
<NET-ASSETS> 2,896,828,214
<DIVIDEND-INCOME> 24,705,264
<INTEREST-INCOME> 10,248,788
<OTHER-INCOME> 0
<EXPENSES-NET> (14,852,923)
<NET-INVESTMENT-INCOME> 20,101,129
<REALIZED-GAINS-CURRENT> 85,952,923
<APPREC-INCREASE-CURRENT> 204,632,325
<NET-CHANGE-FROM-OPS> 310,686,377
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (8,869,800)
<DISTRIBUTIONS-OF-GAINS> (176,611,060)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 12,889,592
<NUMBER-OF-SHARES-REDEEMED> (9,032,386)
<SHARES-REINVESTED> 5,627,328
<NET-CHANGE-IN-ASSETS> 425,612,133
<ACCUMULATED-NII-PRIOR> 8,843,269
<ACCUMULATED-GAINS-PRIOR> 176,267,143
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 13,223,875
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 14,852,923
<AVERAGE-NET-ASSETS> 2,630,499,820
<PER-SHARE-NAV-BEGIN> 32.00
<PER-SHARE-NII> 0.23
<PER-SHARE-GAIN-APPREC> 3.54
<PER-SHARE-DIVIDEND> (0.11)
<PER-SHARE-DISTRIBUTIONS> (2.25)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 33.41
<EXPENSE-RATIO> 1.12
</TABLE>
