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SIGNATURE DANA R. SUTTON
TITLE SR VP & TREASURER
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Prime Portfolio Institutional Shares February 28, 1999
semiannual report.
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<NAME> SHORT TERM INVESTMENTS COMPANY
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Prime Portfolio Private Shares February 28, 1999
semiannual report.
</LEGEND>
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Prime Portfolio Personal Shares February 28, 1999
semiannual report.
</LEGEND>
<CIK> 0000914638
<NAME> SHORT TERM INVESTMENTS COMPANY
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<AVERAGE-NET-ASSETS> 170661786
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.02
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.02)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.58
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Prime Portfolio Cash Management Shares
February 28, 1999 semiannual report.
</LEGEND>
<CIK> 0000914638
<NAME> SHORT TERM INVESTMENTS COMPANY
<SERIES>
<NUMBER> 1
<NAME> PRIME PORTFOLIO CASH MANAGEMENT SHARES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 9350814949
<INVESTMENTS-AT-VALUE> 9350814949
<RECEIVABLES> 2388757
<ASSETS-OTHER> 639457
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 9353843163
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 39253400
<TOTAL-LIABILITIES> 39253400
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 9314596101
<SHARES-COMMON-STOCK> 9314596101
<SHARES-COMMON-PRIOR> 7839304181
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (6338)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 9314589763
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 249884542
<OTHER-INCOME> 0
<EXPENSES-NET> (5817736)
<NET-INVESTMENT-INCOME> 244066806
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 244066806
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (244066806)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 74153901327
<NUMBER-OF-SHARES-REDEEMED> (72731903049)
<SHARES-REINVESTED> 53293642
<NET-CHANGE-IN-ASSETS> 1475291920
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (6338)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2606650
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 6578665
<AVERAGE-NET-ASSETS> 1136189173
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.03)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.16
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Prime Portfolio Resource Shares
February 28, 1999 semiannual report.
</LEGEND>
<CIK> 0000914638
<NAME> SHORT TERM INVESTMENTS COMPANY
<SERIES>
<NUMBER> 1
<NAME> PRIME PORTFOLIO RESOURCE SHARES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 9350814949
<INVESTMENTS-AT-VALUE> 9350814949
<RECEIVABLES> 2388757
<ASSETS-OTHER> 639457
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 9353843163
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 39253400
<TOTAL-LIABILITIES> 39253400
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 9314596101
<SHARES-COMMON-STOCK> 9314596101
<SHARES-COMMON-PRIOR> 7839304181
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (6338)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 9314589763
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 249884542
<OTHER-INCOME> 0
<EXPENSES-NET> (5817736)
<NET-INVESTMENT-INCOME> 244066806
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 244066806
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (244066806)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 74153901327
<NUMBER-OF-SHARES-REDEEMED> (72731903049)
<SHARES-REINVESTED> 53293642
<NET-CHANGE-IN-ASSETS> 1475291920
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (6338)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2606650
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 6578665
<AVERAGE-NET-ASSETS> 490880001
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.02
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.02)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.24
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Prime Portfolio Reserve Shares
February 28, 1999 semiannual report.
</LEGEND>
<CIK> 0000914638
<NAME> SHORT TERM INVESTMENTS COMPANY
<SERIES>
<NUMBER> 1
<NAME> PRIME PORTFOLIO RESERVE SHARES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 9350814949
<INVESTMENTS-AT-VALUE> 9350814949
<RECEIVABLES> 2388757
<ASSETS-OTHER> 639457
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 9353843163
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 39253400
<TOTAL-LIABILITIES> 39253400
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 9314596101
<SHARES-COMMON-STOCK> 9314596101
<SHARES-COMMON-PRIOR> 7839304181
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (6338)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 9314589763
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 249884542
<OTHER-INCOME> 0
<EXPENSES-NET> (5817736)
<NET-INVESTMENT-INCOME> 244066806
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 244066806
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (244066806)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 74153901327
<NUMBER-OF-SHARES-REDEEMED> (72731903049)
<SHARES-REINVESTED> 53293642
<NET-CHANGE-IN-ASSETS> 1475291920
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (6338)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2606650
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 6578665
<AVERAGE-NET-ASSETS> 25928
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.01
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.01)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.88
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Liquid Assets Institutional Shares February 28, 1999
semiannual report.
</LEGEND>
<CIK> 0000914638
<NAME> SHORT TERM INVESTMENTS COMPANY
<SERIES>
<NUMBER> 5
<NAME> LIQUID ASSETS PORTFOLIO INSTITUTIONAL SHARES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 7239320565
<INVESTMENTS-AT-VALUE> 7239320565
<RECEIVABLES> 8841699
<ASSETS-OTHER> 275002
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 7248437266
<PAYABLE-FOR-SECURITIES> 174342452
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 25833425
<TOTAL-LIABILITIES> 200175877
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7048218603
<SHARES-COMMON-STOCK> 7048218603
<SHARES-COMMON-PRIOR> 3910243129
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 42786
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 7048261389
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 146268180
<OTHER-INCOME> 0
<EXPENSES-NET> (2926762)
<NET-INVESTMENT-INCOME> 143341418
<REALIZED-GAINS-CURRENT> 672251
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 144013669
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (143341418)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 72184397344
<NUMBER-OF-SHARES-REDEEMED> (69076048907)
<SHARES-REINVESTED> 29627037
<NET-CHANGE-IN-ASSETS> 3138647725
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (629465)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4215316
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5799946
<AVERAGE-NET-ASSETS> 4787961263
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.03)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .09
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Liquid Assets Private Shares February 28, 1999
semiannual report.
</LEGEND>
<CIK> 0000914638
<NAME> SHORT TERM INVESTMENTS COMPANY
<SERIES>
<NUMBER> 5
<NAME> LIQUID ASSETS PORTFOLIO PRIVATE SHARES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 7239320565
<INVESTMENTS-AT-VALUE> 7239320565
<RECEIVABLES> 8841699
<ASSETS-OTHER> 275002
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 7248437266
<PAYABLE-FOR-SECURITIES> 174342452
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 25833425
<TOTAL-LIABILITIES> 200175877
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7048218603
<SHARES-COMMON-STOCK> 7048218603
<SHARES-COMMON-PRIOR> 3910243129
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 42786
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 7048261389
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 146268180
<OTHER-INCOME> 0
<EXPENSES-NET> (2926762)
<NET-INVESTMENT-INCOME> 143341418
<REALIZED-GAINS-CURRENT> 672251
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 144013669
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (143341418)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 72184397344
<NUMBER-OF-SHARES-REDEEMED> (69076048907)
<SHARES-REINVESTED> 29627037
<NET-CHANGE-IN-ASSETS> 3138647725
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (629465)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4215316
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5799946
<AVERAGE-NET-ASSETS> 137254233
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.02
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.02)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .38
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Liquid Assets Personal Shares
February 28, 1999 semiannual report.
</LEGEND>
<CIK> 0000914638
<NAME> SHORT TERM INVESTMENTS COMPANY
<SERIES>
<NUMBER> 5
<NAME> LIQUID ASSETS PORTFOLIO PERSONAL SHARES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 7239320565
<INVESTMENTS-AT-VALUE> 7239320565
<RECEIVABLES> 8841699
<ASSETS-OTHER> 275002
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 7248437266
<PAYABLE-FOR-SECURITIES> 174342452
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 25833425
<TOTAL-LIABILITIES> 200175877
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7048218603
<SHARES-COMMON-STOCK> 7048218603
<SHARES-COMMON-PRIOR> 3910243129
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 42786
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 7048261389
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 146268180
<OTHER-INCOME> 0
<EXPENSES-NET> (2926762)
<NET-INVESTMENT-INCOME> 143341418
<REALIZED-GAINS-CURRENT> 672251
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 144013669
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (143341418)
<DISTRIBUTIONS-OF-GAINS> 0
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<NUMBER-OF-SHARES-SOLD> 72184397344
<NUMBER-OF-SHARES-REDEEMED> (69076048907)
<SHARES-REINVESTED> 29627037
<NET-CHANGE-IN-ASSETS> 3138647725
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (629465)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4215316
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5799946
<AVERAGE-NET-ASSETS> 0
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.01
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.01)
<PER-SHARE-DISTRIBUTIONS> 0.00
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<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .00
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Liquid Assets Cash Management Shares
February 28, 1999 semiannual report.
</LEGEND>
<CIK> 0000914638
<NAME> SHORT TERM INVESTMENTS COMPANY
<SERIES>
<NUMBER> 5
<NAME> LIQUID ASSETS PORTFOLIO CASH MANAGEMENT SHARES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 7239320565
<INVESTMENTS-AT-VALUE> 7239320565
<RECEIVABLES> 8841699
<ASSETS-OTHER> 275002
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 7248437266
<PAYABLE-FOR-SECURITIES> 174342452
<SENIOR-LONG-TERM-DEBT> 0
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<TOTAL-LIABILITIES> 200175877
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7048218603
<SHARES-COMMON-STOCK> 7048218603
<SHARES-COMMON-PRIOR> 3910243129
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 42786
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 7048261389
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 146268180
<OTHER-INCOME> 0
<EXPENSES-NET> (2926762)
<NET-INVESTMENT-INCOME> 143341418
<REALIZED-GAINS-CURRENT> 672251
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 144013669
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (143341418)
<DISTRIBUTIONS-OF-GAINS> 0
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<NUMBER-OF-SHARES-SOLD> 72184397344
<NUMBER-OF-SHARES-REDEEMED> (69076048907)
<SHARES-REINVESTED> 29627037
<NET-CHANGE-IN-ASSETS> 3138647725
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (629465)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4215316
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5799946
<AVERAGE-NET-ASSETS> 679158999
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.03)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .16
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Liquid Assets Reserve Shares
February 28, 1999 semiannual report.
</LEGEND>
<CIK> 0000914638
<NAME> SHORT TERM INVESTMENTS COMPANY
<SERIES>
<NUMBER> 5
<NAME> LIQUID ASSETS PORTFOLIO RESERVE SHARES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 7239320565
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<RECEIVABLES> 8841699
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<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 7248437266
<PAYABLE-FOR-SECURITIES> 174342452
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 25833425
<TOTAL-LIABILITIES> 200175877
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7048218603
<SHARES-COMMON-STOCK> 7048218603
<SHARES-COMMON-PRIOR> 3910243129
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 42786
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 7048261389
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<EXPENSES-NET> (2926762)
<NET-INVESTMENT-INCOME> 143341418
<REALIZED-GAINS-CURRENT> 672251
<APPREC-INCREASE-CURRENT> 0
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<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (143341418)
<DISTRIBUTIONS-OF-GAINS> 0
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<NUMBER-OF-SHARES-SOLD> 72184397344
<NUMBER-OF-SHARES-REDEEMED> (69076048907)
<SHARES-REINVESTED> 29627037
<NET-CHANGE-IN-ASSETS> 3138647725
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (629465)
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<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5799946
<AVERAGE-NET-ASSETS> 0
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.01
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.01)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .00
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information from the Short Term
Investments Company Liquid Assets Resource Shares
February 28, 1999 semiannual report.
</LEGEND>
<CIK> 0000914638
<NAME> SHORT TERM INVESTMENTS COMPANY
<SERIES>
<NUMBER> 5
<NAME> LIQUID ASSETS PORTFOLIO RESOURCE SHARES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 7239320565
<INVESTMENTS-AT-VALUE> 7239320565
<RECEIVABLES> 8841699
<ASSETS-OTHER> 275002
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 7248437266
<PAYABLE-FOR-SECURITIES> 174342452
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 25833425
<TOTAL-LIABILITIES> 200175877
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7048218603
<SHARES-COMMON-STOCK> 7048218603
<SHARES-COMMON-PRIOR> 3910243129
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 42786
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 7048261389
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 146268180
<OTHER-INCOME> 0
<EXPENSES-NET> (2926762)
<NET-INVESTMENT-INCOME> 143341418
<REALIZED-GAINS-CURRENT> 672251
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 144013669
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (143341418)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 72184397344
<NUMBER-OF-SHARES-REDEEMED> (69076048907)
<SHARES-REINVESTED> 29627037
<NET-CHANGE-IN-ASSETS> 3138647725
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (629465)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4215316
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5799946
<AVERAGE-NET-ASSETS> 62625258
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.02
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.02)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .28
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
