<PAGE> PAGE 1
000 B000000 07/31/95
000 C000000 842790
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 Y
000 H000000 N
000 I000000 3.0.a
000 J000000 U
001 A000000 AIM INVESTMENT SECURITIES FUND
001 B000000 811-5686
001 C000000 7136261919
002 A000000 11 GREENWAY PLAZA, SUITE 1919
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002 C000000 TX
002 D010000 77046
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007 C020100 AIM ADJUSTABLE RATE GOVERNMENT FUND
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007 C020200 LIMITED MATURITY TREASURY INSTITUTIONAL SHARE
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007 C010300 3
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007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
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008 C00AA01 801-12313
008 D01AA01 HOUSTON
008 D02AA01 TX
008 D03AA01 77046
013 A00AA01 KPMG PEAT MARWICK LLP
013 B01AA01 HOUSTON
013 B02AA01 TX
013 B03AA01 77002
022 A000001 GOLDMAN, SACHS & CO.
022 B000001 13-5108880
022 C000001 704878
<PAGE> PAGE 2
022 D000001 31908
022 A000002 MORGAN STANLEY & CO., INC.
022 B000002 13-2655998
022 C000002 230802
022 D000002 87745
022 A000003 SALOMON BROTHERS INC.
022 B000003 13-3082694
022 C000003 121911
022 D000003 109308
022 A000004 DAIWA SECURITIES AMERICA INC.
022 B000004 13-5680329
022 C000004 144258
022 D000004 0
022 A000005 CITICORP SECURITIES MARKETS INC.
022 B000005 13-4994650
022 C000005 73005
022 D000005 60623
022 A000006 MERRIL LYNCH, PIERCE, FENNER & SMITH INC.
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022 C000006 74779
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022 A000007 SMITH BARNEY, HARRIS UPHAM & CO. INC.
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022 C000007 42098
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022 A000008 FIRST BOSTON CORPORATION (THE)
022 B000008 13-5659485
022 C000008 31759
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022 A000009 PAINEWEBBER INCORPORATED
022 B000009 13-2638166
022 C000009 24980
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<PAGE> PAGE 3
054 B00AA00 N
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012 A000101 AIM FUND SERVICES, INC.
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015 A000101 STATE STREET BANK & TRUST CO.
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<PAGE> PAGE 4
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<PAGE> PAGE 5
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<PAGE> PAGE 6
070 D020100 N
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<PAGE> PAGE 7
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015 A000201 BANK OF NEW YORK
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<PAGE> PAGE 8
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<PAGE> PAGE 9
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<PAGE> PAGE 10
070 B010200 N
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 14
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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SIGNATURE JONN J. ARTHUR
TITLE SR. V.P. & TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information for the AIM Adjustable
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</LEGEND>
<CIK> 0000842790
<NAME> AIM INVESTMENTS SECURITIES FUNDS, INC.
<SERIES>
<NUMBER> 1
<NAME> AIM ADJUSTABLE RATE MORTGAGE FUND
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</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information for the Institutional
Shares of the Limited Maturity Treasury Portfolio for the year ended
July 31, 1995.
</LEGEND>
<CIK> 0000842790
<NAME> AIM INVESTMENT SECURITIES FUNDS, INC.
<SERIES>
<NUMBER> 2
<NAME> LIMITED MATURITY - INSTITUTIONAL SHARES
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<DISTRIBUTIONS-OF-INCOME> (22353697)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1443720
<NUMBER-OF-SHARES-REDEEMED> (2194873)
<SHARES-REINVESTED> 113174
<NET-CHANGE-IN-ASSETS> (60903529)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (2787090)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 809449
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1767734
<AVERAGE-NET-ASSETS> 123910861
<PER-SHARE-NAV-BEGIN> 9.96
<PER-SHARE-NII> 0.57
<PER-SHARE-GAIN-APPREC> 0.07
<PER-SHARE-DIVIDEND> (0.57)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.03
<EXPENSE-RATIO> 0.28
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information for the AIM Limited
Maturity Treasury Shares of the Limited Maturity Treasury Portfolio for the
year ended July 31, 1995.
</LEGEND>
<CIK> 0000842790
<NAME> AIM INVESTMENT SECURITIES FUNDS, INC.
<SERIES>
<NUMBER> 3
<NAME> AIM LIMITED MATURITY TREASURY SHARES
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JUL-31-1995
<PERIOD-END> JUL-31-1995
<INVESTMENTS-AT-COST> 394125287
<INVESTMENTS-AT-VALUE> 398136915
<RECEIVABLES> 7538801
<ASSETS-OTHER> 221142
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 405896858
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1886484
<TOTAL-LIABILITIES> 1886484
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 410024906
<SHARES-COMMON-STOCK> 40285235
<SHARES-COMMON-PRIOR> 46686850
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (10026160)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4011628
<NET-ASSETS> 404010374
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 24121431
<OTHER-INCOME> 0
<EXPENSES-NET> 1767734
<NET-INVESTMENT-INCOME> 22353697
<REALIZED-GAINS-CURRENT> (7239070)
<APPREC-INCREASE-CURRENT> 9384912
<NET-CHANGE-FROM-OPS> 24499539
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (22353697)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 15641151
<NUMBER-OF-SHARES-REDEEMED> (22488544)
<SHARES-REINVESTED> 1083758
<NET-CHANGE-IN-ASSETS> (60903529)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (2787090)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 809449
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1767734
<AVERAGE-NET-ASSETS> 280789286
<PER-SHARE-NAV-BEGIN> 9.96
<PER-SHARE-NII> 0.54
<PER-SHARE-GAIN-APPREC> 0.07
<PER-SHARE-DIVIDEND> (0.54)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.03
<EXPENSE-RATIO> 0.51
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
