SHORT TERM INVESTMENTS TRUST
N-30B-2, 1995-04-26
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<PAGE>   1
[AIM LOGO]


LETTER
TO OUR
SHAREHOLDERS

March 6, 1995




Dear Shareholder:

              Volatility persisted in short-term fixed-income securities
              markets over the six months ended February 28, 1995, as interest
              rates continued to climb. The Federal Reserve Board maintained
              its restrictive monetary policy by raising short-term interest
[PHOTO OF     rates in November and again in February, which positioned the
CHARLES T.    federal funds rate at approximately 6 percent and the discount
  BAUER       rate at 5.25 percent.   
Chairman        Financial markets strengthened as economic indicators, though
 of the       mixed,  suggested a slower rate of growth in the economy.  Such
Board of      evidence prompted Federal Reserve Chairman Alan Greenspan to
the Fund]     provide encouraging testimony before Congress in late February
              that the current condition of the economy--moderate growth, low
              unemployment, and low inflation--was healthier than it had been
              in years. In addition, the Chairman told Congress that the
              central bank would be ready to loosen credit at the first sign of
              recession.
    Greenspan's remarks triggered a rally in both stock and bond markets, but 
the dollar fell.  The dollar's persistent weakness led some analysts to
speculate that inflation remains a near-term possibility, prompting renewed
concerns that interest rates would have to rise again in coming months.

YOUR INVESTMENT PORTFOLIO

The Short-Term Investments Trust (STIT) Treasury Portfolio managers
consistently pursued the Portfolio's objective of maximizing current income
consistent with the preservation of capital and maintenance of liquidity,
concentrating the Portfolio's investments in repurchase agreements and U.S.
Treasury securities. At the end of the reporting period, Treasury Portfolio's
weighted average maturity was 27 days. A complete listing of the Portfolio's
holdings begins on page 2.  
    Treasury Portfolio managers took advantage of rising interest rates to 
capture attractive yields and outperform similar funds tracked by the
IBC/Donoghue's Money Fund Averages(TM). As of February 28, 1995, the 30-day
average yield of the Cash Management Class of Treasury Portfolio was 5.76
percent compared to 5.56 percent for IBC/Donoghue's Money Fund Averages--
Government Only/Institutional Only and 5.24 percent for IBC/Donoghue's Money
Fund Averages--U.S. Treasury & Repurchase Agreements. Net assets of the Cash
Management Class of Treasury Portfolio were $73.37 million.
    Treasury Portfolio maintained its AAAm credit quality rating, the highest 
given by Standard & Poor's Corporation, a widely known credit rating agency.
The AAAm rating is historical and is based on annual analysis of the
Portfolio's credit quality  and composition, management, and weekly portfolio
review. 

OUTLOOK FOR THE FUTURE

Leading economic indicators continue to suggest healthy economic conditions and
low inflation, and the economy is widely expected to slow in the second half of
1995. As a result, fixed-income securities have begun to exhibit more stability
across most maturity levels. The direction of the dollar remains a significant
uncertainty that could precipitate renewed inflation concerns and higher
short-term interest rates.  
    AIM remains committed to the primary objectives of safety, liquidity, and 
yield in institutional money fund management.  As always, we are ready to
respond to your comments about this report and any questions you may have about
your Fund.  Please call us at (800) 659-1005. 

Respectfully submitted, 

/s/  CHARLES T. BAUER

Charles T. Bauer 
Chairman
<PAGE>   2
 
                    SCHEDULE OF INVESTMENTS
 
                    February 28, 1995
                    (Unaudited)
 
<TABLE>
<CAPTION>                    
                                                                        MATURITY        PAR (000)           VALUE
                            <S>                                         <C>             <C>             <C>
                            U.S. TREASURY SECURITIES-28.22%

                            U.S. TREASURY BILLS(a)
                            4.985%                                      03/16/95        $ 40,000        $ 39,916,917
                            ----------------------------------------------------------------------------------------
                            4.99%                                       03/16/95          15,750          15,717,254
                            ----------------------------------------------------------------------------------------
                            5.57%                                       03/30/95          25,000          24,887,827
                            ----------------------------------------------------------------------------------------
                            5.515%                                      05/04/95          50,000          49,509,778
                            ----------------------------------------------------------------------------------------
                            5.54%                                       05/04/95          30,000          29,704,534
                            ----------------------------------------------------------------------------------------
                            5.80%                                       06/29/95          50,000          49,033,333
                            ----------------------------------------------------------------------------------------
                            6.075%                                      06/29/95          35,000          34,291,250
                            ----------------------------------------------------------------------------------------
                            6.165%                                      07/06/95          35,000          34,238,794
                            ----------------------------------------------------------------------------------------
                            6.025%                                      08/24/95          50,000          48,527,222
                            ----------------------------------------------------------------------------------------
                            6.065%                                      08/24/95          50,000          48,517,444
                            ----------------------------------------------------------------------------------------
                            5.925%                                      08/31/95          30,000          29,096,438
                            ----------------------------------------------------------------------------------------
                            5.935%                                      08/31/95          20,000          19,396,608
                            ----------------------------------------------------------------------------------------
                            5.99%                                       08/31/95          50,000          48,485,861
                            ----------------------------------------------------------------------------------------
                                                                                                         471,323,260
                            ----------------------------------------------------------------------------------------
                            U.S. TREASURY NOTES
                            3.875%                                      03/31/95          50,000          49,946,095
                            ----------------------------------------------------------------------------------------
                            3.875%                                      04/30/95         156,798         156,244,753
                            ----------------------------------------------------------------------------------------
                            5.875%                                      05/15/95         150,000         149,929,950
                            ----------------------------------------------------------------------------------------
                                                                                                         356,120,798
                            ----------------------------------------------------------------------------------------
                                     Total U.S. Treasury Securities                                      827,444,058
                            ----------------------------------------------------------------------------------------
                                     TOTAL INVESTMENTS (excluding
                                       repurchase agreements)                                            827,444,058
                            ========================================================================================


</TABLE>
 
                                                             2
<PAGE>   3
 
                    SCHEDULE OF INVESTMENTS
 
                    February 28, 1995
                    (Unaudited)
 
<TABLE>
<CAPTION>
                                                                       MATURITY        PAR(000)            VALUE
                            <S>                                        <C>             <C>             <C>
                            REPURCHASE AGREEMENTS(b)-75.32%

                            BT Securities Corp.
                              6.05%(c)                                    --           $130,000        $  130,000,000
                            -----------------------------------------------------------------------------------------
                              6.10%(d)                                    --             46,000            46,000,000
                            -----------------------------------------------------------------------------------------
                            Barclays de Zoete Wedd Government
                              Securities, Inc.
                              6.10%(e)                                 03/01/95         140,000           140,000,000
                            -----------------------------------------------------------------------------------------
                            Bear, Stearns & Co. Inc.
                              6.10%(f)                                    --            130,000           130,000,000
                            -----------------------------------------------------------------------------------------
                            Citicorp Securities, Inc.
                              6.10%(g)                                 03/01/95         140,000           140,000,000
                            -----------------------------------------------------------------------------------------
                            Daiwa Securities America Inc.
                              6.10%(h)                                 03/01/95         130,000           130,000,000
                            -----------------------------------------------------------------------------------------
                            Deutsche Bank Government Securities,
                              Inc.
                              6.10%(i)                                    --            160,000           160,000,000
                            -----------------------------------------------------------------------------------------
                              6.10%(j)                                    --            111,000           111,000,000
                            -----------------------------------------------------------------------------------------
                              6.125%(k)                                03/01/95         100,000           100,000,000
                            -----------------------------------------------------------------------------------------
                            Fuji Securities Inc.
                              6.11%(l)                                    --            100,000           100,000,000
                            -----------------------------------------------------------------------------------------
                            Goldman, Sachs & Co.
                              6.10%(m)                                 03/01/95         205,459           205,458,871
                            -----------------------------------------------------------------------------------------
                            Morgan (J.P.) Securities, Inc.
                              6.10%(n)                                 03/01/95         140,000           140,000,000
                            -----------------------------------------------------------------------------------------
                            Morgan Stanley Group, Inc.
                              6.10%(o)                                 03/01/95         200,000           200,000,000
                            -----------------------------------------------------------------------------------------
                            Nikko Securities Co., Ltd.
                              6.10%(p)                                    --             56,000            56,000,000
                            -----------------------------------------------------------------------------------------
                            SBC Government Securities, Inc.
                              6.10%(q)                                 03/01/95         140,000           140,000,000
                            -----------------------------------------------------------------------------------------
                            Smith Barney Inc.
                              6.09%(r)                                    --            140,000           140,000,000
                            -----------------------------------------------------------------------------------------
                            State Street Bank & Trust Co.
                              6.08%(s)                                 03/01/95         140,000           140,000,000
                            -----------------------------------------------------------------------------------------
                                Total Repurchase Agreements                                             2,208,458,871
                            -----------------------------------------------------------------------------------------
                                TOTAL INVESTMENTS-103.54%                                               3,035,902,929(t)
                            -----------------------------------------------------------------------------------------
                                OTHER ASSETS LESS LIABILITIES-(3.54%)                                    (103,855,285)
                            -----------------------------------------------------------------------------------------
                                NET ASSETS-100.00%                                                     $2,932,047,644
                            =========================================================================================
</TABLE>
 
                                                             3
<PAGE>   4
 
                    NOTES TO SCHEDULE OF INVESTMENTS:
 
<TABLE>
                           <S>  <C>
                           (a)  U.S. Treasury Bills are traded on a discount basis. In such cases the
                                interest rate shown represents the rate of discount paid or received
                                at the time of purchase by the Portfolio.

                           (b)  Collateral on repurchase agreements including the Portfolio's pro-rata
                                interest in joint repurchase agreements is taken into possession by
                                the Portfolio upon entering into the repurchase agreement. The
                                collateral is marked to market daily to ensure its market value as
                                being 102% of the sales price of the repurchase agreement. The
                                investments in some repurchase agreements are through participation in
                                joint accounts with other funds managed by the investment advisor.

                           (c)  Open repurchase agreement entered into 02/27/95; however, either party
                                may terminate the agreement upon demand. Interest rates are
                                redetermined daily. Collateralized by $106,510,000 U.S. Treasury
                                obligations, 10.75% due 08/15/05.

                           (d)  Open joint repurchase agreement entered into 02/27/95; however, either
                                party may terminate the agreement upon demand. Interest rates are
                                redetermined daily. Collateralized by $88,155,000 U.S. Treasury
                                obligations, 0% due 05/15/97 to 05/15/06.

                           (e)  Entered into 02/28/95 with a maturing value of $140,023,722.
                                Collateralized by $140,058,000 U.S. Treasury obligations, 0% to
                                12.375% due 03/31/95 to 11/15/24.

                           (f)  Open repurchase agreement entered into 12/08/94; however, either party
                                may terminate the agreement upon demand. Interest rates are
                                redetermined daily. Collateralized by $245,835,000 U.S. Treasury
                                obligations, 0% due 05/15/97 to 11/15/07.

                           (g)  Entered into 02/28/95 with a maturing value of $140,023,722.
                                Collateralized by $142,400,000 U.S. Treasury obligations, 5.50% to
                                6.75% due 04/30/96 to 05/31/99.

                           (h)  Entered into 02/28/95 with a maturing value of $130,022,028.
                                Collateralized by $130,486,000 U.S. Treasury obligations, 5.875% to
                                8.00% due 08/15/99 to 02/15/25.

                           (i)  Open repurchase agreement entered into 04/13/94; however, either party
                                may terminate the agreement upon demand. Interest rates are
                                redetermined daily. Collateralized by $161,216,000 U.S. Treasury
                                obligations, 0% to 13.75% due 04/15/95 to 02/15/23.

                           (j)  Open joint repurchase agreement entered into 12/09/94; however, either
                                party may terminate the agreement upon demand. Interest rates are
                                redetermined daily. Collateralized by $404,388,000 U.S. Treasury
                                obligations, 0% to 11.875% due 04/15/95 to 02/15/25.

                           (k)  Entered into 02/28/95 with a maturing value of $100,017,014.
                                Collateralized by $104,265,000 U.S. Treasury obligations, 0% to 6.50%
                                due 04/20/95 to 08/15/97.

                           (l)  Open joint repurchase agreement entered into 01/11/95; however, either
                                party may terminate the agreement upon demand. Interest rates are
                                redetermined daily. Collateralized by $309,970,000 U.S. Treasury
                                obligations, 0% due 11/15/00 to 05/15/14.

                           (m)  Joint repurchase agreement entered into 02/28/95 with a maturing value
                                of $206,787,131. Collateralized by $204,407,000 U.S. Treasury
                                obligations, 0% to 8.875% due 08/15/95 to 11/15/98.

                           (n)  Entered into 02/28/95 with a maturing value of $140,023,722.
                                Collateralized by $294,822,000 U.S. Treasury obligations, 0% to 12.00%
                                due 05/15/03 to 02/15/21.

                           (o)  Entered into 02/28/95 with a maturing value of $200,033,889.
                                Collateralized by $202,540,000 U.S. Treasury obligations, 7.50% due
                                01/31/97.

                           (p)  Open joint repurchase agreement entered into 12/12/94; however, either
                                party may terminate the agreement upon demand. Interest rates are
                                redetermined daily. Collateralized by $124,828,000 U.S. Treasury
                                obligations, 0% to 11.875% due 10/19/95 to 11/15/03.
</TABLE>
 
                                                             4
<PAGE>   5
 
<TABLE>
                           <S>  <C>
                           (q)  Entered into 02/28/95 with a maturing value of $140,023,722.
                                Collateralized by $141,914,000 U.S. Treasury obligations, 0% to 9.375%
                                due 03/02/95 to 11/15/01.

                           (r)  Open repurchase agreement entered into 12/12/94; however, either party
                                may terminate the agreement upon demand. Interest rates are
                                redetermined daily. Collateralized by $136,935,000 U.S. Treasury
                                obligations, 0% to 10.75% due 05/15/95 to 02/15/16.

                           (s)  Entered into 02/28/95 with a maturing value of $140,923,644.
                                Collateralized by $143,885,000 U.S. Treasury obligations, 6.25% due
                                08/31/96.

                           (t)  Also represents cost for federal income tax purposes.
</TABLE>








 
                    See Notes to Financial Statements.
 
                                                             5
<PAGE>   6
 
                    STATEMENT OF ASSETS AND LIABILITIES
 
                    February 28, 1995
                    (Unaudited)
 
<TABLE>
                            <S>                                                                 <C>
                            ASSETS:

                            Investments, excluding repurchase agreements, at value (amortized
                              cost)                                                             $  827,444,058
                            ----------------------------------------------------------------------------------
                            Repurchase agreements                                                2,208,458,871
                            ----------------------------------------------------------------------------------
                            Interest receivable                                                      6,187,694
                            ----------------------------------------------------------------------------------
                            Investment for deferred compensation plan                                   24,221
                            ----------------------------------------------------------------------------------
                            Other assets                                                               131,502
                            ----------------------------------------------------------------------------------
                                     Total assets                                                3,042,246,346
                            ----------------------------------------------------------------------------------
                            LIABILITIES:

                            Payable for investments purchased                                       96,978,907
                            ----------------------------------------------------------------------------------
                            Deferred compensation payable                                               24,221
                            ----------------------------------------------------------------------------------
                            Dividends payable                                                       12,834,198
                            ----------------------------------------------------------------------------------
                            Accrued advisory fees                                                      143,732
                            ----------------------------------------------------------------------------------
                            Accrued distribution fees                                                  142,184
                            ----------------------------------------------------------------------------------
                            Accrued transfer agent fees                                                 12,939
                            ----------------------------------------------------------------------------------
                            Accrued trustees' fees                                                       6,273
                            ----------------------------------------------------------------------------------
                            Accrued administrative service fees                                          2,393
                            ----------------------------------------------------------------------------------
                            Accrued custodian fees                                                      25,002
                            ----------------------------------------------------------------------------------
                            Accrued operating expenses                                                  28,853
                            ----------------------------------------------------------------------------------
                                     Total liabilities                                             110,198,702
                            ----------------------------------------------------------------------------------
                            NET ASSETS                                                          $2,932,047,644
                            ==================================================================================
                            NET ASSETS:

                            Institutional Class                                                 $2,301,161,094
                            ----------------------------------------------------------------------------------
                            Private Investment Class                                            $  468,472,728
                            ----------------------------------------------------------------------------------
                            Personal Investment Class                                           $   89,047,935
                            ----------------------------------------------------------------------------------
                            Cash Management Class                                               $   73,365,887
                            ==================================================================================
                            NET ASSET VALUE PER SHARE:

                            SHARES OF BENEFICIAL INTEREST, $.01 PAR VALUE PER SHARE:

                            Institutional Class                                                  2,301,011,703
                            ----------------------------------------------------------------------------------
                            Private Investment Class                                               468,440,763
                            ----------------------------------------------------------------------------------
                            Personal Investment Class                                               89,041,928
                            ----------------------------------------------------------------------------------
                            Cash Management Class                                                   73,361,123
                            ==================================================================================
                            Net asset value, offering and redemption price per share                     $1.00
                            ==================================================================================
</TABLE>
 
                    See Notes to Financial Statements.
 
                                                             6
<PAGE>   7
 
                    STATEMENT OF OPERATIONS
 
                    For the six months ended February 28, 1995
                    (Unaudited)
 
<TABLE>
                            <S>                                                                   <C>
                            INVESTMENT INCOME:

                            Interest income                                                       $75,184,158
                            ---------------------------------------------------------------------------------
                            EXPENSES:

                            Advisory fees                                                             926,686
                            ---------------------------------------------------------------------------------
                            Custodian fees                                                            161,147
                            ---------------------------------------------------------------------------------
                            Administrative service fees                                                95,203
                            ---------------------------------------------------------------------------------
                            Trustees' fees and expenses                                                15,935
                            ---------------------------------------------------------------------------------
                            Transfer agent fees                                                        30,299
                            ---------------------------------------------------------------------------------
                            Professional fees                                                          56,894
                            ---------------------------------------------------------------------------------
                            Distribution fees (Note 2)                                                853,156
                            ---------------------------------------------------------------------------------
                            Other                                                                     124,074
                            ---------------------------------------------------------------------------------
                                     Total expenses                                                 2,263,394
                            ---------------------------------------------------------------------------------
                            Less expenses assumed by advisor                                          (27,000)
                            ---------------------------------------------------------------------------------
                                     Net expenses                                                   2,236,394
                            ---------------------------------------------------------------------------------
                            Net investment income                                                  72,947,764
                            ---------------------------------------------------------------------------------
                            Net realized gain on sales of investments                                  37,616
                            ---------------------------------------------------------------------------------
                            Net increase in net assets resulting from operations                  $72,985,380
                            =================================================================================
</TABLE>
 
                    STATEMENT OF CHANGES IN NET ASSETS
 
                    For the six months ended February 28, 1995 and the year 
                    ended August 31, 1994
                    (Unaudited)
 
<TABLE>
<CAPTION>
                                                                                       1995              1994
                            <S>                                                   <C>               <C>
                            --------------------------------------------------------------------------------------
                            OPERATIONS:

                              Net investment income                               $   72,947,764    $  129,450,854
                            --------------------------------------------------------------------------------------
                              Net realized gain on sales of investments                   37,616            63,526
                            --------------------------------------------------------------------------------------
                              Net increase in net assets resulting from
                                operations                                            72,985,380       129,514,380
                            --------------------------------------------------------------------------------------
                            Distributions to shareholders from net investment
                              income                                                 (72,947,764)     (129,450,854)
                            --------------------------------------------------------------------------------------
                            Share transactions -- net                                (95,296,212)     (908,258,039)
                            --------------------------------------------------------------------------------------
                              Net increase (decrease) in net assets                  (95,258,596)     (908,194,513)
                            --------------------------------------------------------------------------------------
                            NET ASSETS:

                              Beginning of period                                  3,027,306,240     3,935,500,753
                            --------------------------------------------------------------------------------------
                              End of period                                       $2,932,047,644    $3,027,306,240
                            ======================================================================================
                            NET ASSETS CONSIST OF:

                              Shares of beneficial interest                       $2,931,855,517    $3,027,151,729
                            --------------------------------------------------------------------------------------
                              Undistributed net realized gain on sales of
                                investments                                              192,127           154,511
                            --------------------------------------------------------------------------------------
                                                                                  $2,932,047,644    $3,027,306,240
                            ======================================================================================
</TABLE>
 
                    See Notes to Financial Statements.
 
                                                             7
<PAGE>   8
 
                    NOTES TO FINANCIAL STATEMENTS
 
                    February 28, 1995
                    (Unaudited)
 
                    NOTE 1-SIGNIFICANT ACCOUNTING POLICIES

                    Short-Term Investments Trust (the "Fund") is
                    registered under the Investment Company Act of 1940,
                    as amended, as an open-end series diversified
                    management investment company. The Fund is organized
                    as a Delaware business trust consisting of two
                    different portfolios, each of which offers separate
                    series of shares: the Treasury Portfolio and the
                    Treasury TaxAdvantage Portfolio. Information
                    presented in these financial statements pertains
                    only to the Treasury Portfolio (the "Portfolio"),
                    with assets, liabilities and operations of each
                    portfolio being accounted for separately. The
                    Portfolio consists of four different classes of
                    shares: the Institutional Class, the Private
                    Investment Class, the Personal Investment Class, and
                    the Cash Management Class.
                      The following is a summary of the significant
                    accounting policies followed by the Portfolio in the
                    preparation of its financial statements.
 
                    A. Security Valuations - The Portfolio invests only
                       in securities which have maturities of 397 days
                       or less. The securities are valued on the basis
                       of amortized cost which approximates market
                       value. This method values a security at its cost
                       on the date of purchase and thereafter assumes a
                       constant amortization to maturity of any discount
                       or premium.
 
                    B. Securities Transactions, Investment Income and
                       Distributions - Securities transactions are
                       accounted for on a trade date basis. Realized
                       gains or losses are computed on the basis of
                       specific identification of the securities sold.
                       Interest income, adjusted for amortization of
                       premiums and discounts on investments, is accrued
                       daily. Dividends to shareholders are declared
                       daily and are paid on the first business day of
                       the following month.
 
                    C. Federal Income Taxes - The Portfolio intends to
                       comply with the requirements of the Internal
                       Revenue Code necessary to qualify as a regulated
                       investment company and, as such, will not be
                       subject to federal income taxes on otherwise
                       taxable income (including net realized capital
                       gains) which is distributed to shareholders.
                       Therefore, no provision for federal income taxes
                       is recorded in the financial statements.
 
                    D. Expenses - Operating expenses directly
                       attributable to a class of shares are charged to
                       that class' operations. Expenses which are
                       applicable to more than one class, e.g., advisory
                       fees, are allocated among them.
 
                                                             8
<PAGE>   9
 
                    NOTE 2-ADVISORY FEES AND OTHER TRANSACTIONS WITH AFFILIATES
 
                    The Fund has entered into a master investment
                    advisory agreement with A I M Advisors, Inc.
                    ("AIM"). Under the terms of the master advisory
                    agreement, AIM receives a monthly fee with respect
                    to the Portfolio calculated by applying a monthly
                    rate, based upon the following annual rates, to the
                    average daily net assets of the Portfolio:
 
<TABLE>
<CAPTION>
                           Net Assets                                                            Rate
                           <S>                                                                   <C>
                           ---------------------------------------------------------------------------
                           First $300 million                                                    0.15%
                           ---------------------------------------------------------------------------
                           Over $300 million to $1.5 billion                                     0.06%
                           ---------------------------------------------------------------------------
                           Over $1.5 billion                                                     0.05%
                           ===========================================================================
</TABLE>
 
                    AIM will, if necessary, reduce its fee for any
                    fiscal year to the extent required so that the
                    amount of ordinary expenses of the Portfolio
                    (excluding interest, taxes, brokerage commissions
                    and extraordinary expenses) paid or incurred by the
                    Portfolio for such fiscal year does not exceed the
                    applicable expense limitations imposed by the state
                    securities regulations in any state in which the
                    Portfolio's shares are qualified for sale. AIM
                    voluntarily reimbursed expenses of $27,000 on the
                    Treasury Portfolio Personal Investment Class during
                    the six months ended February 28, 1995.
                      The Portfolio, pursuant to a master administrative
                    services agreement with AIM, has agreed to reimburse
                    AIM for certain costs incurred in providing
                    accounting and shareholder services to the
                    Portfolio. During the six months ended February 28,
                    1995, the Portfolio reimbursed AIM $95,203 for such
                    services. Effective September 16, 1994, A I M
                    Institutional Fund Services ("AIFS") became a
                    transfer agent to the Fund.
                      Under the terms of a master distribution agreement
                    between Fund Management Company ("FMC") and the
                    Fund, FMC acts as the exclusive distributor of the
                    Fund's shares. The Fund has adopted a master
                    distribution plan (the "Plan") pursuant to Rule
                    12b-1 under the 1940 Act with respect to the Private
                    Investment Class, Personal Investment Class and the
                    Cash Management Class of the Portfolio. The Plan
                    provides that the Treasury Portfolio's Private
                    Investment Class, Personal Investment Class and Cash
                    Management Class may pay up to a 0.50%, 0.75% and
                    0.10%, respectively, maximum annual rate of the
                    average daily net assets attributable to such class.
                    Of this amount, the Fund may pay an asset-based
                    sales charge to FMC and the Fund may pay a service
                    fee of (a) 0.25% of the average daily net assets of
                    each of the Private Investment Class and the
                    Personal Investment Class and (b) 0.10% of the
                    average daily net assets of the Cash Management
                    Class, to selected banks, broker-dealers and other
                    financial institutions who offer continuing personal
                    shareholder services to their customers who purchase
                    and own shares of the Private Investment Class, the
                    Personal Investment Class or the Cash Management
                    Class. Any amounts not paid as a service fee under
                    such Plan would constitute an asset-based sales
                    charge. During the six months ended February 28,
                    1995, the Treasury Portfolio Private Investment
                    Class, the Treasury Portfolio Personal Investment
                    Class and the Treasury Portfolio Cash Management
                    Class accrued for compensation to FMC amounts of
                    $613,717, $210,098 and $29,341, respectively, under
                    the Plan. Certain officers and trustees of the Trust
                    are officers of AIM, FMC and AIFS.
                      The Portfolio paid legal fees of $1,646 for the
                    year ended February 28, 1995 for services rendered
                    by Reid & Priest as counsel to the Board of
                    Trustees. In September 1994, Kramer, Levin,
                    Naftalis, Nessen, Kamin & Frankel was appointed as
                    counsel to the Board of Trustees and the Portfolio
                    paid legal fees of $10,966 for services rendered by
                    that firm as counsel to the Board of Trustees. A
                    trustee of the Trust was a member of the firm of
                    Reid & Priest until September 1994, when be became a
                    member of Kramer, Levin, Naftalis, Nessen, Kamin &
                    Frankel.
 
                                                             9
<PAGE>   10
 
                    NOTE 3-TRUSTEES' FEES
 
                    Trustees' fees represent remuneration paid or
                    accrued to each trustee who is not an "interested
                    person" of the Fund. The Fund invests trustees'
                    fees, if so elected by a trustee, in mutual fund
                    shares in accordance with a deferred compensation
                    plan.
 
                    NOTE 4-SHARE INFORMATION
 
                    Changes in shares outstanding during the six months
                    ended February 28, 1995 and the year ended August
                    31, 1994 were as follows:
 
<TABLE>
<CAPTION>
                                                                 February 28, 1995                      August 31, 1994
                                                         ----------------------------------    ----------------------------------
                                                             Shares             Amount             Shares             Amount
                              <S>                        <C>                <C>                <C>                <C>
                                                         ----------------------------------    ----------------------------------
                              Sold:
                                Institutional Class        6,228,515,661    $ 6,228,515,661     26,026,026,543    $26,026,026,543
                              ------------------------   ----------------------------------    ----------------------------------
                                Private Investment
                                  Class                      745,680,082        745,680,082        827,921,059        827,921,059
                              ------------------------   ----------------------------------    ----------------------------------
                                Personal Investment
                                  Class                      244,087,733        244,087,733        343,375,963        343,375,963
                              ------------------------   ----------------------------------    ----------------------------------
                                Cash Management Class         36,566,601         36,566,601        142,326,763        142,326,763
                              ------------------------   ----------------------------------    ----------------------------------
                              Issued as reinvestment
                                of dividends:
                                Institutional Class            5,230,168          5,230,168         11,688,081         11,688,081
                              ------------------------   ----------------------------------    ----------------------------------
                                Private Investment
                                  Class                        1,129,339          1,129,339            361,516            361,516
                              ------------------------   ----------------------------------    ----------------------------------
                                Personal Investment
                                  Class                        1,003,959          1,003,959          1,153,701          1,153,701
                              ------------------------   ----------------------------------    ----------------------------------
                                Cash Management Class          1,224,623          1,224,623          1,883,744          1,883,744
                              ------------------------   ----------------------------------    ----------------------------------
                              Reacquired:
                                Institutional Class       (6,384,997,730)    (6,384,997,730)   (27,238,038,910)   (27,238,038,910)
                              ------------------------   ----------------------------------    ----------------------------------
                                Private Investment
                                  Class                     (691,063,841)      (691,063,841)      (619,863,560)      (619,863,560)
                              ------------------------   ----------------------------------    ----------------------------------
                                Personal Investment
                                  Class                     (244,627,552)      (244,627,552)      (325,817,071)      (325,817,071)
                              ------------------------   ----------------------------------    ----------------------------------
                                Cash Management Class        (38,045,255)       (38,045,255)       (79,275,868)       (79,275,868)
                              ------------------------   ----------------------------------    ----------------------------------
                              Net increase (decrease)        (95,296,212)   $   (95,296,212)      (908,258,039)   $  (908,258,039)
                              ========================   ==================================    ==================================
</TABLE>
 
                                                             10
<PAGE>   11
 
                    NOTE 5-FINANCIAL HIGHLIGHTS
 
                    Shown below are the condensed financial highlights
                    for a share outstanding of the Treasury Portfolio
                    Cash Management Class during the six months ended
                    February 28, 1995, the year ended August 31, 1994
                    and the period August 17, 1993 (date operations
                    commenced) through August 31, 1993.
 
<TABLE>
<CAPTION>
                                                                                             AUGUST 31,
                                                                         FEBRUARY 28,    -------------------
                                                                             1995         1994         1993
                                                                            ------       ------       ------
                            <S>                                             <C>          <C>          <C>
                            Net asset value, beginning of period            $  1.00      $ 1.00       $ 1.00
                            ----------------------------------------------- -------      -------       ------
                            Income from investment operations:
                              Net investment income                            0.03         0.03        0.001
                            ----------------------------------------------- -------      -------       ------
                            Less distributions:
                              Dividends from net investment income            (0.03)       (0.03)      (0.001)
                            ----------------------------------------------- -------      -------       ------
                            Net asset value, end of period                  $  1.00      $  1.00       $ 1.00
                            =============================================== =======      =======       ======
                            Total return                                       5.10%(a)     3.44%        2.91%(a)
                            =============================================== =======      =======       ======
                            Ratios/supplemental data:
                            Net assets, end of period (000s omitted)        $73,366      $73,619      $8,681
                            =============================================== =======      =======       ======
                            Ratio of expenses to average net assets            0.18%(b)     0.16%(c)     0.16%(a)
                            =============================================== =======      =======       ======
                            Ratio of net investment income to average net
                              assets                                           5.04%(b)     3.48%(c)     3.00%(a)
                            =============================================== =======      =======       ======
</TABLE>
 
                    (a) Annualized.
                    (b) Ratios are annualized and based on average net
                        assets of $73,959,485.
                    (c) Had there been no expense reimbursements, the
                        ratios of expenses and net investment income to
                        average net assets would have been 0.19% and
                        3.45%.
 
                                                             11
<PAGE>   12

                                   TRUSTEES

Charles T. Bauer                                                John F. Kroeger
Bruce L. Crockett                                              Lewis F. Pennock
Owen Daly II                                                    Ian W. Robinson
Carl Frischling                                                  Louis S. Sklar
Robert H. Graham
 
                                   OFFICERS

Charles T. Bauer                                                       Chairman
Robert H. Graham                                                      President
John J. Arthur                                   Sr. Vice President & Treasurer
Gary T. Crum                                                 Sr. Vice President
William H. Kleh                                              Sr. Vice President
Carol F. Relihan                                     Vice President & Secretary
Dana R. Sutton                             Vice President & Assistant Treasurer
Polly A. Ahrendts                                                Vice President
Gary V. Beauchamp                                                Vice President
Melville B. Cox                                                  Vice President
Karen Dunn Kelley                                                Vice President
J. Abbott Sprague                                                Vice President
Joseph A. Dichiara                                     Assistant Vice President
Dineen Hughes                                          Assistant Vice President
Nancy L. Martin                                             Assistant Secretary
Kathleen J. Pflueger                                        Assistant Secretary
Samuel D. Sirko                                             Assistant Secretary
Stephen I. Winer                                            Assistant Secretary
Mary J. Benson                                              Assistant Treasurer

                              INVESTMENT ADVISOR
                             A I M Advisors, Inc.
                        11 Greenway Plaza, Suite 1919
                              Houston, TX 77046
                                (800) 347-1919
                                      
                                 DISTRIBUTOR
                           Fund Management Company
                        11 Greenway Plaza, Suite 1919
                              Houston, TX 77046
                                (800) 659-1005
                                      
                                  CUSTODIAN
                             The Bank of New York
                            110 Washington Street
                              New York, NY 10286
                                      
                            LEGAL COUNSEL TO FUND
                      Ballard Spahr Andrews & Ingersoll
                        1735 Market Street, 51st Floor
                         Philadelphia, PA 19103-7599
                                      
                          LEGAL COUNSEL TO TRUSTEES
               Kramer, Levin, Naftalis, Nessen, Kamin & Frankel
                               919 Third Avenue
                              New York, NY 10022

                               TRANSFER AGENTS
                        State Street Bank & Trust Co.
                             225 Franklin Street
                               Boston, MA 02110
                                     and
                   A I M Institutional Fund Services, Inc.
                        11 Greenway Plaza, Suite 1919
                              Houston, TX 77046
                                      
This report may be distributed only to current shareholders or to persons who
have received a current prospectus.  


                                                             Short-Term 
                                                             Investments Trust 
                                                             (STIT)

                                                             Treasury Portfolio
                                                             Cash Management
                                                             Class


                                                             Semi-
                                                             Annual
                                                             Report

                                                             February 28, 1995
                                             [LOGO OF FUND MANAGEMENT COMPANY]  


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