<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000893658
<NAME> ARK
<SERIES>
<NUMBER> 090
<NAME> ARK SMALL CAP EQUITY INSTITUTIONAL
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> APR-30-2000
<PERIOD-START> MAY-01-1999
<PERIOD-END> APR-30-2000
<INVESTMENTS-AT-COST> 108957
<INVESTMENTS-AT-VALUE> 106440
<RECEIVABLES> 1477
<ASSETS-OTHER> 1
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 107918
<PAYABLE-FOR-SECURITIES> 15137
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 114
<TOTAL-LIABILITIES> 15251
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 59854
<SHARES-COMMON-STOCK> 3502
<SHARES-COMMON-PRIOR> 2416
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 35330
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (2517)
<NET-ASSETS> 92667
<DIVIDEND-INCOME> 87
<INTEREST-INCOME> 356
<OTHER-INCOME> 0
<EXPENSES-NET> (747)
<NET-INVESTMENT-INCOME> (304)
<REALIZED-GAINS-CURRENT> 43819
<APPREC-INCREASE-CURRENT> (4360)
<NET-CHANGE-FROM-OPS> 39155
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (11450)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1094
<NUMBER-OF-SHARES-REDEEMED> (563)
<SHARES-REINVESTED> 555
<NET-CHANGE-IN-ASSETS> 50813
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 4330
<OVERDISTRIB-NII-PRIOR> (95)
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 500
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 775
<AVERAGE-NET-ASSETS> 62410
<PER-SHARE-NAV-BEGIN> 12.65
<PER-SHARE-NII> (0.08)
<PER-SHARE-GAIN-APPREC> 15.39
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (4.72)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 23.24
<EXPENSE-RATIO> 1.19
</TABLE>