<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 024
<NAME> CALAMOS GROWTH & INCOME FUND CLASS I
<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> 55,097,267
<INVESTMENTS-AT-VALUE> 67,677,021
<RECEIVABLES> 1,489,009
<ASSETS-OTHER> 5,217,360
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 74,383,390
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 215,970
<TOTAL-LIABILITIES> 215,970
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 52,632,417
<SHARES-COMMON-STOCK> 2,527,319
<SHARES-COMMON-PRIOR> 1,978,826
<ACCUMULATED-NII-CURRENT> 171,858
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 8,783,391
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 12,579,754
<NET-ASSETS> 74,167,420
<DIVIDEND-INCOME> 846,006
<INTEREST-INCOME> 325,307
<OTHER-INCOME> 0
<EXPENSES-NET> 434,326
<NET-INVESTMENT-INCOME> 736,987
<REALIZED-GAINS-CURRENT> 1,942,557
<APPREC-INCREASE-CURRENT> 1,063,542
<NET-CHANGE-FROM-OPS> 3,743,086
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 708,892
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 634,679
<NUMBER-OF-SHARES-REDEEMED> 104,132
<SHARES-REINVESTED> 17,946
<NET-CHANGE-IN-ASSETS> 18,254,907
<ACCUMULATED-NII-PRIOR> 143,763
<ACCUMULATED-GAINS-PRIOR> 6,840,834
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 228,524
<INTEREST-EXPENSE> 0
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<AVERAGE-NET-ASSETS> 3,091,858
<PER-SHARE-NAV-BEGIN> 28.44
<PER-SHARE-NII> 0.38
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<PER-SHARE-DIVIDEND> 0.37
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 29.53
<EXPENSE-RATIO> 1.10
</TABLE>
