<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000080248
<NAME> T. ROWE PRICE NEW HORIZONS FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 4786190
<INVESTMENTS-AT-VALUE> 7123806
<RECEIVABLES> 82354
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 7206160
<PAYABLE-FOR-SECURITIES> 12595
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 31038
<TOTAL-LIABILITIES> 43633
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3981790
<SHARES-COMMON-STOCK> 235372
<SHARES-COMMON-PRIOR> 218703
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (17833)
<ACCUMULATED-NET-GAINS> 860962
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2337616
<NET-ASSETS> 7162528
<DIVIDEND-INCOME> 2151
<INTEREST-INCOME> 9437
<OTHER-INCOME> 0
<EXPENSES-NET> 29421
<NET-INVESTMENT-INCOME> (17833)
<REALIZED-GAINS-CURRENT> 663587
<APPREC-INCREASE-CURRENT> (19724)
<NET-CHANGE-FROM-OPS> 626030
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 44205
<NUMBER-OF-SHARES-REDEEMED> (27536)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 1140532
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 197375
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 22341
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 29489
<AVERAGE-NET-ASSETS> 6740545
<PER-SHARE-NAV-BEGIN> 27.53
<PER-SHARE-NII> (0.08)
<PER-SHARE-GAIN-APPREC> 2.98
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 30.43
<EXPENSE-RATIO> 0.88
</TABLE>
