AIM INVESTMENT SECURITIES FUNDS INC
NSAR-A, 1997-03-31
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<PAGE>      PAGE  1
000 A000000 01/31/97
000 C000000 842790
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 U
001 A000000 AIM INVESTMENT SECURITIES FUNDS
001 B000000 811-5686
001 C000000 7136261919
002 A000000 ELEVEN GREENWAY PLAZA, SUITE 100
002 B000000 HOUSTON
002 C000000 TX
002 D010000 77046
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 Y
007 B000000  2
007 C010100  1
007 C010200  2
007 C020200 LIMITED MATURITY TREASURY INSTIT. SHARES
007 C030200 N
007 C010300  3
007 C020300 AIM LIMITED MATURITY TREASURY SHARES
007 C030300 N
007 C010400  4
007 C010500  5
007 C010600  6
007 C010700  7
007 C010800  8
007 C010900  9
007 C011000 10
008 A00AA01 AIM ADVISORS, INC.
008 B00AA01 A
008 C00AA01 801-12313
008 D01AA01 HOUSTON
008 D02AA01 TX
008 D03AA01 77046
008 D04AA01 1173
013 A00AA01 KPMG PEAT MARWICK LLP
013 B01AA01 HOUSTON
013 B02AA01 TX
013 B03AA01 77002
015 A00AA01 BANK OF NEW YORK
015 B00AA01 C
015 C01AA01 NEW YORK
015 C02AA01 NY
<PAGE>      PAGE  2
015 C03AA01 10249
015 E01AA01 X
018  00AA00 Y
019 A00AA00 Y
019 B00AA00   40
019 C00AA00 AIMFUNDSAA
022 A000001 MENDAM CAPITAL GROUP, INC.
022 B000001 22-3165996
022 C000001     57443
022 D000001     44627
022 A000002 CITICORP SECURITIES MARKETS, INC.
022 B000002 13-4994650
022 C000002     44635
022 D000002     48040
022 A000003 SALOMON BROTHERS INC.
022 B000003 13-3082694
022 C000003     49584
022 D000003     39901
022 A000004 GOLDMAN SACHS & CO.
022 B000004 13-5108880
022 C000004     34440
022 D000004     12795
022 A000005 FIRST BOSTON CORPORATION (THE)
022 B000005 13-5659485
022 C000005     20000
022 D000005     26705
022 A000006 PAINE WEBBER INCORPORATED
022 B000006 13-2638166
022 C000006      4725
022 D000006     38238
022 A000007 BEAR STERNS AND CO. INC.
022 B000007 13-3299429
022 C000007     17635
022 D000007     16720
022 A000008 DEUTSCHE BANK SECURITIES CORPORATION
022 B000008 13-2730828
022 C000008      9992
022 D000008     16210
022 A000009 SANWA SECURITIES (USA) CO., L.P.
022 B000009 13-3046258
022 C000009         0
022 D000009     23386
022 A000010 SMITH BARNEY INC.
022 B000010 13-1912900
022 C000010      6867
022 D000010     11969
023 C000000     265620
023 D000000     359204
024  00AA00 N
026 A000000 N
026 B000000 N
<PAGE>      PAGE  3
026 C000000 N
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026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
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048 G01AA00        0
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048 J01AA00        0
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048 K01AA00   500000
048 K02AA00 0.175
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050  00AA00 N
051  00AA00 N
052  00AA00 N
053 A00AA00 N
054 A00AA00 Y
054 B00AA00 N
054 C00AA00 N
054 D00AA00 N
054 E00AA00 N
054 F00AA00 N
054 G00AA00 N
054 H00AA00 Y
054 I00AA00 N
054 J00AA00 Y
054 K00AA00 N
054 L00AA00 N
<PAGE>      PAGE  4
054 M00AA00 Y
054 N00AA00 N
054 O00AA00 N
062 A00AA00 Y
062 B00AA00   0.0
062 C00AA00   0.0
062 D00AA00   0.0
062 E00AA00   0.0
062 F00AA00   0.0
062 G00AA00   0.0
062 H00AA00   0.0
062 I00AA00   0.0
062 J00AA00   0.0
062 K00AA00   0.0
062 L00AA00   0.0
062 M00AA00  99.3
062 N00AA00   0.0
062 O00AA00   0.0
062 P00AA00   0.0
062 Q00AA00   0.0
062 R00AA00   0.0
063 A00AA00   0
063 B00AA00  1.5
064 A00AA00 N
066 A00AA00 N
067  00AA00 N
068 A00AA00 N
068 B00AA00 N
069  00AA00 N
070 A01AA00 Y
070 A02AA00 N
070 B01AA00 N
070 B02AA00 N
070 C01AA00 N
070 C02AA00 N
070 D01AA00 N
070 D02AA00 N
070 E01AA00 N
070 E02AA00 N
070 F01AA00 N
070 F02AA00 N
070 G01AA00 N
070 G02AA00 N
070 H01AA00 N
070 H02AA00 N
070 I01AA00 N
070 I02AA00 N
070 J01AA00 N
070 J02AA00 N
070 K01AA00 N
070 K02AA00 N
<PAGE>      PAGE  5
070 L01AA00 N
070 L02AA00 N
070 M01AA00 N
070 M02AA00 N
070 N01AA00 Y
070 N02AA00 N
070 O01AA00 Y
070 O02AA00 N
070 P01AA00 Y
070 P02AA00 N
070 Q01AA00 N
070 Q02AA00 N
070 R01AA00 N
070 R02AA00 N
077 A000000 Y
077 Q010000 Y
078  000000 N
011 A000201 FUND MANAGEMENT COMPANY (FMC)
011 B000201 8-41848
011 C010201 HOUSTON
011 C020201 TX
011 C030201 77046
012 A000201 AIM INSTITUTIONAL FUND SERVICES, INC.
012 B000201 84-5541
012 C010201 HOUSTON
012 C020201 TX
012 C030201 77046
028 A010200       371
028 A020200        67
028 A030200         0
028 A040200     74916
028 B010200      5262
028 B020200        37
028 B030200         0
028 B040200     12106
028 C010200      2282
028 C020200        16
028 C030200         0
028 C040200      1764
028 D010200      4179
028 D020200        11
028 D030200         0
028 D040200     10262
028 E010200       336
028 E020200         8
028 E030200         0
028 E040200      6979
028 F010200       306
028 F020200         4
028 F030200         0
028 F040200      6441
<PAGE>      PAGE  6
028 G010200     12736
028 G020200       143
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028 G040200    112468
028 H000200         0
029  000200 N
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030 B000200  0.00
030 C000200  0.00
034  000200 N
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036 B000200      0
037  000200 N
038  000200      0
039  000200 N
040  000200 N
055 A000200 N
055 B000200 N
056  000200 N
057  000200 N
058 A000200 N
059  000200 Y
060 A000200 Y
060 B000200 Y
061  000200  1000000
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071 B000200    359204
071 C000200    434758
071 D000200   61
072 A000200  6
072 B000200     1855
072 C000200        0
072 D000200        0
072 E000200        0
072 F000200       64
072 G000200        0
072 H000200        0
072 I000200        3
072 J000200        3
072 K000200        0
072 L000200        5
072 M000200        1
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072 O000200        0
072 P000200        0
072 Q000200        5
072 R000200        2
072 S000200        3
072 T000200        0
072 U000200        0
072 V000200        0
<PAGE>      PAGE  7
072 W000200       10
072 X000200       96
072 Y000200        0
072 Z000200     1759
072AA000200       54
072BB000200      139
072CC010200      485
072CC020200        0
072DD010200     1759
072DD020200        0
072EE000200        0
073 A010200   0.2771
073 A020200   0.0000
073 B000200   0.0000
073 C000200   0.0000
074 A000200        0
074 B000200        0
074 C000200        0
074 D000200    44241
074 E000200        0
074 F000200        0
074 G000200        0
074 H000200        0
074 I000200        0
074 J000200        0
074 K000200        0
074 L000200      636
074 M000200       15
074 N000200    44892
074 O000200        0
074 P000200       12
074 Q000200        0
074 R010200        0
074 R020200        0
074 R030200        0
074 R040200      316
074 S000200        0
074 T000200    44564
074 U010200     4444
074 U020200        0
074 V010200    10.03
074 V020200     0.00
074 W000200   0.0000
074 X000200       13
074 Y000200        0
075 A000200        0
075 B000200    70257
076  000200     0.00
011 A000301 AIM DISTRIBUTORS, INC.
011 B000301 8-21323
011 C010301 HOUSTON
<PAGE>      PAGE  8
011 C020301 TX
011 C030301 77046
012 A000301 AIM FUNDS SERVICES, INC.
012 B000301 84-5432
012 C010301 HOUSTON
012 C020301 TX
012 C030301 77210
012 C040301 4739
028 A010300      8207
028 A020300      1294
028 A030300         0
028 A040300     14280
028 B010300     15218
028 B020300      1238
028 B030300         0
028 B040300     15217
028 C010300     22482
028 C020300      1317
028 C030300         0
028 C040300     15166
028 D010300     13796
028 D020300      1317
028 D030300         0
028 D040300     13543
028 E010300     25386
028 E020300      1373
028 E030300         0
028 E040300     17595
028 F010300     21938
028 F020300      1397
028 F030300         0
028 F040300     35932
028 G010300    107027
028 G020300      7936
028 G030300         0
028 G040300    111733
028 H000300     27169
029  000300 Y
030 A000300    205
030 B000300  1.00
030 C000300  0.00
031 A000300     71
031 B000300      0
032  000300    134
033  000300      0
034  000300 N
035  000300      0
036 B000300      0
037  000300 N
038  000300      0
039  000300 N
<PAGE>      PAGE  9
040  000300 Y
041  000300 Y
042 A000300   0
042 B000300   0
042 C000300 100
042 D000300   0
042 E000300   0
042 F000300   0
042 G000300   0
042 H000300   0
043  000300    276
044  000300      0
055 A000300 N
055 B000300 N
056  000300 N
057  000300 N
058 A000300 N
059  000300 Y
060 A000300 Y
060 B000300 Y
061  000300      500
071 A000300    265620
071 B000300    359204
071 C000300    434758
071 D000300   61
072 A000300  6
072 B000300    10640
072 C000300        0
072 D000300        0
072 E000300        0
072 F000300      368
072 G000300        0
072 H000300        0
072 I000300      181
072 J000300       19
072 K000300        0
072 L000300       31
072 M000300        4
072 N000300        2
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072 P000300        0
072 Q000300       28
072 R000300       10
072 S000300       16
072 T000300      276
072 U000300        0
072 V000300        0
072 W000300       56
072 X000300      991
072 Y000300        3
072 Z000300     9652
<PAGE>      PAGE  10
072AA000300      307
072BB000300      796
072CC010300     2782
072CC020300        0
072DD010300     9652
072DD020300        0
072EE000300        0
073 A010300   0.2651
073 A020300   0.0000
073 B000300   0.0000
073 C000300   0.0000
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074 B000300        0
074 C000300        0
074 D000300   361642
074 E000300        0
074 F000300        0
074 G000300        0
074 H000300        0
074 I000300        0
074 J000300        0
074 K000300        0
074 L000300     5195
074 M000300      123
074 N000300   366960
074 O000300        0
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074 Q000300        0
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074 R030300        0
074 R040300     2545
074 S000300        0
074 T000300   364286
074 U010300    36330
074 U020300        0
074 V010300    10.03
074 V020300     0.00
074 W000300   0.0000
074 X000300     8676
074 Y000300        0
075 A000300        0
075 B000300   363782
076  000300     0.00
SIGNATURE   JOHN J. ARTHUR                               
TITLE       SR. V.P. & TRESURER 
 


<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information for the Institutional
Shares of the Limited Maturity Treasury Portfolio for the six months ended
January 31, 1997.
</LEGEND>
<CIK> 0000842790
<NAME> AIM INVESTMENT SECURITIES FUNDS
<SERIES>
   <NUMBER> 2
   <NAME> LIMITED MATURITY TREASURY INSTITUTIONAL SHARES
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUL-31-1997
<PERIOD-END>                               JAN-31-1997
<INVESTMENTS-AT-COST>                        404897126
<INVESTMENTS-AT-VALUE>                       405882990
<RECEIVABLES>                                  5831108
<ASSETS-OTHER>                                  137263
<OTHER-ITEMS-ASSETS>                               816
<TOTAL-ASSETS>                               411852177
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      3001732
<TOTAL-LIABILITIES>                            3001732
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     415441713
<SHARES-COMMON-STOCK>                         40774719
<SHARES-COMMON-PRIOR>                         50399269
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (7577132)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        985864
<NET-ASSETS>                                 408850445
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                             12495613
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               (1084497)
<NET-INVESTMENT-INCOME>                       11411116
<REALIZED-GAINS-CURRENT>                      (573799)
<APPREC-INCREASE-CURRENT>                      3267146
<NET-CHANGE-FROM-OPS>                         14104463
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                   (11411116)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                       11975169
<NUMBER-OF-SHARES-REDEEMED>                   22384812
<SHARES-REINVESTED>                             785093
<NET-CHANGE-IN-ASSETS>                      (93665360)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (7003333)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           431679
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                1087579
<AVERAGE-NET-ASSETS>                          63639659
<PER-SHARE-NAV-BEGIN>                             9.97
<PER-SHARE-NII>                                   0.27
<PER-SHARE-GAIN-APPREC>                           0.06
<PER-SHARE-DIVIDEND>                            (0.27)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.03
<EXPENSE-RATIO>                                   0.30
<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 Porfolio for
the six months ended January 31, 1997.
</LEGEND>
<CIK> 0000842790
<NAME> AIM INVESTMENT SECURITIES FUNDS
<SERIES>
   <NUMBER> 003
   <NAME> AIM LIMITED MATURITY TREASURY SHARES
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUL-31-1997
<PERIOD-END>                               JAN-31-1997
<INVESTMENTS-AT-COST>                        404897126
<INVESTMENTS-AT-VALUE>                       405882990
<RECEIVABLES>                                  5831108
<ASSETS-OTHER>                                  137263
<OTHER-ITEMS-ASSETS>                               816
<TOTAL-ASSETS>                               411852177
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      3001732
<TOTAL-LIABILITIES>                            3001732
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     415441713
<SHARES-COMMON-STOCK>                         40774719
<SHARES-COMMON-PRIOR>                         50399269
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (7577132)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        985864
<NET-ASSETS>                                 408850445
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                             12495613
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               (1084497)
<NET-INVESTMENT-INCOME>                       11411116
<REALIZED-GAINS-CURRENT>                      (573799)
<APPREC-INCREASE-CURRENT>                      3267146
<NET-CHANGE-FROM-OPS>                         14104463
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                   (11411116)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                       11975169
<NUMBER-OF-SHARES-REDEEMED>                   22384812
<SHARES-REINVESTED>                             785093
<NET-CHANGE-IN-ASSETS>                      (93665360)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (7003333)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           431679
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                1087579
<AVERAGE-NET-ASSETS>                         364520172
<PER-SHARE-NAV-BEGIN>                             9.97
<PER-SHARE-NII>                                   0.27
<PER-SHARE-GAIN-APPREC>                           0.06
<PER-SHARE-DIVIDEND>                            (0.27)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.03
<EXPENSE-RATIO>                                   0.54
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>


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