<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information from the AIM Mid Cap
Opportunities Class A Fund - October 31, 2000 annual report.
</LEGEND>
<SERIES>
<NUMBER> 4
<NAME> AIM MID CAP OPPORTUNITIES CLASS A FUND
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> OCT-31-2000
<INVESTMENTS-AT-COST> 582,824,245
<INVESTMENTS-AT-VALUE> 624,518,964
<RECEIVABLES> 153,879,311
<ASSETS-OTHER> 21,512
<OTHER-ITEMS-ASSETS> 14,709,468
<TOTAL-ASSETS> 793,129,255
<PAYABLE-FOR-SECURITIES> 8,916,989
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 152,944,196
<TOTAL-LIABILITIES> 161,861,185
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 637,331,518
<SHARES-COMMON-STOCK> 27,336,476
<SHARES-COMMON-PRIOR> 29,373,881
<ACCUMULATED-NII-CURRENT> (32,785)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (39,849,670)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 33,819,007
<NET-ASSETS> 631,268,070
<DIVIDEND-INCOME> 840,775
<INTEREST-INCOME> 402,550
<OTHER-INCOME> 2,063,309
<EXPENSES-NET> (4,088,827)
<NET-INVESTMENT-INCOME> (782,193)
<REALIZED-GAINS-CURRENT> (3,070,298)
<APPREC-INCREASE-CURRENT> (7,345,743)
<NET-CHANGE-FROM-OPS> (11,198,234)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 732,559
<NUMBER-OF-SHARES-REDEEMED> (2,769,964)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> (60,826,087)
<ACCUMULATED-NII-PRIOR> (31,466)
<ACCUMULATED-GAINS-PRIOR> (36,753,879)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,520,560
<INTEREST-EXPENSE> 129,210
<GROSS-EXPENSE> 4,190,040
<AVERAGE-NET-ASSETS> 324,622,135
<PER-SHARE-NAV-BEGIN> 23.62
<PER-SHARE-NII> (0.01)
<PER-SHARE-GAIN-APPREC> (0.44)
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 23.17
<EXPENSE-RATIO> 2.06
</TABLE>
