<PAGE> PAGE 1
000 A000000 11/30/1999
000 C000000 00005114
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000 F000000 Y
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000 J000000 A
001 A000000 VAN KAMPEN RESERVE FUND
001 B000000 811-02482
001 C000000 6306846000
002 A000000 1 PARKVIEW PLAZA
002 B000000 OAKBROOK TERRACE
002 C000000 IL
002 D010000 60181
002 D020000 5555
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004 000000 N
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007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A000001 VAN KAMPEN ASSET MANAGEMENT
008 B000001 A
008 C000001 801-8286
008 D010001 OAKBROOK TERRACE
008 D020001 IL
008 D030001 60181
008 D040001 5555
014 A000001 MORGAN STANLEY & CO., INCORPORATED
014 B000001 8-733537
014 A000002 DEAN WITTER REYNOLDS, INC.
014 B000002 8-728181
015 A000001 STATE STREET BANK & TRUST
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02105
015 E010001 X
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<PAGE> PAGE 2
019 A000000 Y
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<PAGE> PAGE 3
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<PAGE> PAGE 4
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<PAGE> PAGE 5
054 L000000 N
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<PAGE> PAGE 6
070 F020000 N
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<PAGE> PAGE 7
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<PAGE> PAGE 8
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SIGNATURE SARA L. BADLER
TITLE ATTORNEY
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
<F1> This item relates to the Fund on a composite
basis and not on a class basis
</LEGEND>
<SERIES>
<NUMBER> 11
<NAME> RESERVE FUND A
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAY-31-2000
<PERIOD-START> JUN-01-1999
<PERIOD-END> NOV-30-1999
<INVESTMENTS-AT-COST> 1,011,086,982 <F1>
<INVESTMENTS-AT-VALUE> 1,011,086,982 <F1>
<RECEIVABLES> 167,706,610 <F1>
<ASSETS-OTHER> 83,409 <F1>
<OTHER-ITEMS-ASSETS> 1,636,575 <F1>
<TOTAL-ASSETS> 1,180,513,576 <F1>
<PAYABLE-FOR-SECURITIES> 0 <F1>
<SENIOR-LONG-TERM-DEBT> 0 <F1>
<OTHER-ITEMS-LIABILITIES> 17,446,116 <F1>
<TOTAL-LIABILITIES> 17,446,116 <F1>
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 922,410,406
<SHARES-COMMON-STOCK> 922,423,989
<SHARES-COMMON-PRIOR> 529,626,999
<ACCUMULATED-NII-CURRENT> 22,507 <F1>
<OVERDISTRIBUTION-NII> 0 <F1>
<ACCUMULATED-NET-GAINS> (64,397)<F1>
<OVERDISTRIBUTION-GAINS> 0 <F1>
<ACCUM-APPREC-OR-DEPREC> 0 <F1>
<NET-ASSETS> 922,400,431
<DIVIDEND-INCOME> 0 <F1>
<INTEREST-INCOME> 26,802,239 <F1>
<OTHER-INCOME> 0 <F1>
<EXPENSES-NET> (4,887,255)<F1>
<NET-INVESTMENT-INCOME> 21,914,984 <F1>
<REALIZED-GAINS-CURRENT> (2,333)<F1>
<APPREC-INCREASE-CURRENT> 0 <F1>
<NET-CHANGE-FROM-OPS> 21,912,651 <F1>
<EQUALIZATION> 0 <F1>
<DISTRIBUTIONS-OF-INCOME> (17,144,340)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 13,011,633,377
<NUMBER-OF-SHARES-REDEEMED> (12,635,137,184)
<SHARES-REINVESTED> 16,300,797
<NET-CHANGE-IN-ASSETS> 392,790,916
<ACCUMULATED-NII-PRIOR> 43,171 <F1>
<ACCUMULATED-GAINS-PRIOR> (62,064)<F1>
<OVERDISTRIB-NII-PRIOR> 0 <F1>
<OVERDIST-NET-GAINS-PRIOR> 0 <F1>
<GROSS-ADVISORY-FEES> 1,980,172 <F1>
<INTEREST-EXPENSE> 0 <F1>
<GROSS-EXPENSE> 4,927,948 <F1>
<AVERAGE-NET-ASSETS> 770,700,471
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.023
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> (0.023)
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.78
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
<F1> This item relates to the Fund on a composite
basis and not on a class basis
</LEGEND>
<SERIES>
<NUMBER> 12
<NAME> RESERVE FUND B
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAY-31-2000
<PERIOD-START> JUN-01-1999
<PERIOD-END> NOV-30-1999
<INVESTMENTS-AT-COST> 1,011,086,982 <F1>
<INVESTMENTS-AT-VALUE> 1,011,086,982 <F1>
<RECEIVABLES> 167,706,610 <F1>
<ASSETS-OTHER> 83,409 <F1>
<OTHER-ITEMS-ASSETS> 1,636,575 <F1>
<TOTAL-ASSETS> 1,180,513,576 <F1>
<PAYABLE-FOR-SECURITIES> 0 <F1>
<SENIOR-LONG-TERM-DEBT> 0 <F1>
<OTHER-ITEMS-LIABILITIES> 17,446,116 <F1>
<TOTAL-LIABILITIES> 17,446,116 <F1>
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 209,635,106
<SHARES-COMMON-STOCK> 209,625,666
<SHARES-COMMON-PRIOR> 129,788,943
<ACCUMULATED-NII-CURRENT> 22,507 <F1>
<OVERDISTRIBUTION-NII> 0 <F1>
<ACCUMULATED-NET-GAINS> (64,397)<F1>
<OVERDISTRIBUTION-GAINS> 0 <F1>
<ACCUM-APPREC-OR-DEPREC> 0 <F1>
<NET-ASSETS> 209,620,931
<DIVIDEND-INCOME> 0 <F1>
<INTEREST-INCOME> 26,802,239 <F1>
<OTHER-INCOME> 0 <F1>
<EXPENSES-NET> (4,887,255)<F1>
<NET-INVESTMENT-INCOME> 21,914,984 <F1>
<REALIZED-GAINS-CURRENT> (2,333)<F1>
<APPREC-INCREASE-CURRENT> 0 <F1>
<NET-CHANGE-FROM-OPS> 21,912,651 <F1>
<EQUALIZATION> 0 <F1>
<DISTRIBUTIONS-OF-INCOME> (3,876,628)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 729,964,283
<NUMBER-OF-SHARES-REDEEMED> (653,755,338)
<SHARES-REINVESTED> 3,627,778
<NET-CHANGE-IN-ASSETS> 79,833,447
<ACCUMULATED-NII-PRIOR> 43,171 <F1>
<ACCUMULATED-GAINS-PRIOR> (62,064)<F1>
<OVERDISTRIB-NII-PRIOR> 0 <F1>
<OVERDIST-NET-GAINS-PRIOR> 0 <F1>
<GROSS-ADVISORY-FEES> 1,980,172 <F1>
<INTEREST-EXPENSE> 0 <F1>
<GROSS-EXPENSE> 4,927,948 <F1>
<AVERAGE-NET-ASSETS> 199,238,406
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.019
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> (0.019)
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 1.56
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
<F1> This item relates to the Fund on a composite
basis and not on a class basis
</LEGEND>
<SERIES>
<NUMBER> 13
<NAME> RESERVE FUND C
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAY-31-2000
<PERIOD-START> JUN-01-1999
<PERIOD-END> NOV-30-1999
<INVESTMENTS-AT-COST> 1,011,086,982 <F1>
<INVESTMENTS-AT-VALUE> 1,011,086,982 <F1>
<RECEIVABLES> 167,706,610 <F1>
<ASSETS-OTHER> 83,409 <F1>
<OTHER-ITEMS-ASSETS> 1,636,575 <F1>
<TOTAL-ASSETS> 1,180,513,576 <F1>
<PAYABLE-FOR-SECURITIES> 0 <F1>
<SENIOR-LONG-TERM-DEBT> 0 <F1>
<OTHER-ITEMS-LIABILITIES> 17,446,116 <F1>
<TOTAL-LIABILITIES> 17,446,116 <F1>
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 31,063,838
<SHARES-COMMON-STOCK> 31,064,083
<SHARES-COMMON-PRIOR> 26,923,579
<ACCUMULATED-NII-CURRENT> 22,507 <F1>
<OVERDISTRIBUTION-NII> 0 <F1>
<ACCUMULATED-NET-GAINS> (64,397)<F1>
<OVERDISTRIBUTION-GAINS> 0 <F1>
<ACCUM-APPREC-OR-DEPREC> 0 <F1>
<NET-ASSETS> 31,046,098
<DIVIDEND-INCOME> 0 <F1>
<INTEREST-INCOME> 26,802,239 <F1>
<OTHER-INCOME> 0 <F1>
<EXPENSES-NET> (4,887,255)<F1>
<NET-INVESTMENT-INCOME> 21,914,984 <F1>
<REALIZED-GAINS-CURRENT> (2,333)<F1>
<APPREC-INCREASE-CURRENT> 0 <F1>
<NET-CHANGE-FROM-OPS> 21,912,651 <F1>
<EQUALIZATION> 0 <F1>
<DISTRIBUTIONS-OF-INCOME> (914,680)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 266,481,716
<NUMBER-OF-SHARES-REDEEMED> (263,182,192)
<SHARES-REINVESTED> 840,980
<NET-CHANGE-IN-ASSETS> 4,126,857
<ACCUMULATED-NII-PRIOR> 43,171 <F1>
<ACCUMULATED-GAINS-PRIOR> (62,064)<F1>
<OVERDISTRIB-NII-PRIOR> 0 <F1>
<OVERDIST-NET-GAINS-PRIOR> 0 <F1>
<GROSS-ADVISORY-FEES> 1,980,172 <F1>
<INTEREST-EXPENSE> 0 <F1>
<GROSS-EXPENSE> 4,927,948 <F1>
<AVERAGE-NET-ASSETS> 46,096,706
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.019
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> (0.019)
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 1.55
</TABLE>
