<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000732697
<NAME> Ultra Series Fund
<SERIES>
<NUMBER> 6
<NAME> Capital Appreciation Stock Fund
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-1-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 633735039
<INVESTMENTS-AT-VALUE> 873675812
<RECEIVABLES> 9232437
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 882908249
<PAYABLE-FOR-SECURITIES> 3649677
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 588503
<TOTAL-LIABILITIES> 4238180
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 619371652
<SHARES-COMMON-STOCK> 33600093
<SHARES-COMMON-PRIOR> 32791492
<ACCUMULATED-NII-CURRENT> 187852
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 19169792
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 239940773
<NET-ASSETS> 878670069
<DIVIDEND-INCOME> 3097158
<INTEREST-INCOME> 550751
<OTHER-INCOME> 0
<EXPENSES-NET> 3376963
<NET-INVESTMENT-INCOME> 270946
<REALIZED-GAINS-CURRENT> 19169792
<APPREC-INCREASE-CURRENT> 8003781
<NET-CHANGE-FROM-OPS> 27444519
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 150893
<DISTRIBUTIONS-OF-GAINS> 9194838
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1675972
<NUMBER-OF-SHARES-REDEEMED> 1213910
<SHARES-REINVESTED> 346539
<NET-CHANGE-IN-ASSETS> 808601
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3370631
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3376963
<AVERAGE-NET-ASSETS> 847779791
<PER-SHARE-NAV-BEGIN> 25.59
<PER-SHARE-NII> .01
<PER-SHARE-GAIN-APPREC> .83
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> .28
<PER-SHARE-NAV-END> 26.15
<EXPENSE-RATIO> .80
</TABLE>
