<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 041
<NAME> CALAMOS GROWTH FUND CLASS A
<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> 84,558,852
<INVESTMENTS-AT-VALUE> 104,378,476
<RECEIVABLES> 3,695,394
<ASSETS-OTHER> 10,580,549
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 118,654,419
<PAYABLE-FOR-SECURITIES> 1,869,618
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 444,249
<TOTAL-LIABILITIES> 2,313,867
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 84,739,745
<SHARES-COMMON-STOCK> 2,237,748
<SHARES-COMMON-PRIOR> 1,042,430
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 11,781,183
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 19,819,624
<NET-ASSETS> 116,340,552
<DIVIDEND-INCOME> 66,574
<INTEREST-INCOME> 127,695
<OTHER-INCOME> 0
<EXPENSES-NET> 683,183
<NET-INVESTMENT-INCOME> (488,914)
<REALIZED-GAINS-CURRENT> 1,951,908
<APPREC-INCREASE-CURRENT> 5,703,212
<NET-CHANGE-FROM-OPS> 7,166,206
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,708,534
<NUMBER-OF-SHARES-REDEEMED> 513,216
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 66,210,245
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 10,318,189
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 374,709
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 683,183
<AVERAGE-NET-ASSETS> 56,309,546
<PER-SHARE-NAV-BEGIN> 48.17
<PER-SHARE-NII> (0.51)
<PER-SHARE-GAIN-APPREC> 4.59
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 52.25
<EXPENSE-RATIO> 1.70
</TABLE>
