STRONG INSTITUTIONAL FUNDS INC
N-30D, 1997-11-07
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<PAGE>

- --------------------------------------------------------------------------------

THE STRONG
INSTITUTIONAL MONEY FUND

SEMI-ANNUAL REPORT o AUGUST 31, 1997




              [PHOTO OF ROUNDTABLE FINANCIAL PLANNING DISCUSSION]



                                 [STRONG LOGO]
                                  STRONG FUNDS


<PAGE>

- --------------------------------------------------------------------------------

THE STRONG
INSTITUTIONAL MONEY FUND

SEMI-ANNUAL REPORT o AUGUST 31, 1997


                                TABLE OF CONTENTS


INVESTMENT REVIEW
     The Strong Institutional Money Fund ..................................2


FINANCIAL INFORMATION

     Schedule of Investments in Securities ................................4

     Statement of Assets and Liabilities ..................................6

     Statement of Operations ..............................................7

     Statement of Changes in Net Assets ...................................7

     Notes to Financial Statements ........................................8


FINANCIAL HIGHLIGHTS ......................................................8


<PAGE>


THE STRONG INSTITUTIONAL MONEY FUND


THE RELATIVE  STABILITY OF  SHORT-TERM  INTEREST  RATES CAN BE  ATTRIBUTED  TO A
CONSISTENTLY BENIGN ECONOMIC ENVIRONMENT.

The Strong  Institutional Money Fund seeks current income, a stable share price,
and daily  liquidity.  The Fund  invests  in  corporate,  bank,  and  government
instruments that present minimal credit risk.(1)

================================
      YIELD SUMMARY(2)
       As of 8-29-97
================================

7-DAY CURRENT YIELD        5.51%
7-DAY EFFECTIVE YIELD      5.66%
AVERAGE MATURITY         34 DAYS
================================

The Strong  Institutional Money Fund continued to perform well over the past six
months.  Through August 31, 1997,  Lipper Analytical  Services,  Inc. ranked the
Fund  in  the  top  4%  of   institutional   money  funds  for  the  1-year  and
since-inception  periods,  and in the top 20% of the  category  for the  6-month
period, out of 169, 156, and 176 institutional money market funds, respectively,
based on total returns.(2)

At the beginning of the Fund's fiscal year in March, money market yields rose in
anticipation of an interest-rate hike from the Federal Reserve.  The Fed obliged
in late March by raising its target rate for Federal Funds by 25 basis points to
5.50%.  Following the Fed's move, short-term rates stabilized.  Commercial paper
yields ended the six-month period higher,  exactly  reflecting the amount of the
Fed's rate hike.

The relative  stability of  short-term  interest  rates can be  attributed  to a
consistently  benign economic  environment.  While Gross Domestic Product growth
has remained  firm,  no signs of a  significant  risk of higher  inflation  have
emerged.  The absence of  inflationary  pressure,  in turn, has kept the Federal
Reserve on the  sidelines  since the rate  increase in March.  With no realistic
threat of a change in monetary policy, money market rates have had little reason
to vary.

The very low degree of  volatility  in  short-term  rates has kept us from using
duration  management  to add  value to the Fund  for most of 1997.  Because  our
analysis  has  indicated  that the  Federal  Reserve has had no reason to either
raise or lower its rate targets,  we have maintained a neutral average maturity.
Similarly, the shape of the money market yield curve has remained fairly stable,
particularly  over the past three months,  preventing  us from making  strategic
plays to benefit from any shifts in it.

2

<PAGE>

Therefore,  our primary  means of adding value over the past six months has been
through security selection.  Certain issues of asset-backed  commercial paper in
particular  have offered us the  opportunity to pick up a few extra basis points
of yield.


OUTLOOK

We don't see too many clouds on the horizon at present. The most likely scenario
we envision is that the U.S.  economy will  continue to generate  decent  growth
with little inflationary pressure.

Even with both  labor and  industrial  production  running  near  capacity,  the
tendency for consumer and producer prices to move upward has yet to
appear in this economic cycle. With inflation tame,  employment high, and growth
satisfactory, the Federal Reserve is likely to leave monetary policy on hold for
the next quarter or two. Consequently, short-term interest rates should continue
to be fairly stable. Thus we intend to keep our portfolio approach unchanged.

[PHOTO OF JAY N. MUELLER]

As always, we thank you for your confidence. We remain committed to meeting your
investment needs in the future.

Sincerely,

/s/Jay N. Mueller

Jay N. Mueller
Portfolio Manager



1    Investments  in the Fund are  neither  insured nor  guaranteed  by the U.S.
     government.  There  can be no  assurance  that  the  Fund  will  be able to
     maintain its stable net asset value of $1.00 per share.

2    Yields are annualized for the 7-day period ended 8-29-97.  Effective yields
     reflect the  compounding of income.  Yields and rankings are historical and
     do not represent  future  results.  Yields will fluctuate.  Currently,  the
     Fund's  Advisor  has  voluntarily  agreed  to  maintain  the  Fund's  Total
     Operating Expenses at no more than 0.21%, resulting in a waiver of 0.20% in
     management fees.  Without this waiver,  the Fund's current yield would have
     been 5.31%, and its effective yield would have been 5.45%.


                                                                               3
<PAGE>

<TABLE>
SCHEDULE OF INVESTMENTS IN SECURITIES                                                           August 31, 1997 (Unaudited)
- ---------------------------------------------------------------------------------------------------------------------------
<CAPTION>


                                                                               PRINCIPAL     YIELD TO     MATURITY     AMORTIZED
                                                                                AMOUNT       MATURITY     DATE (b)   COST (NOTE 2)
- ----------------------------------------------------------------------------------------------------------------------------------
CERTIFICATES OF DEPOSIT 7.0%
<S>                                                                            <C>             <C>        <C>       <C>       
Deutsche Bank AG New York, 6.18%                                              $4,000,000       6.20%      4/03/98  $ 3,999,554
Huntington National Bank, 6.25%                                                5,000,000       6.28       4/24/98    4,999,084
National Bank of Canada, 5.87%                                                 5,000,000       5.87       9/29/97    5,000,000
Societe Generale:
  6.08%                                                                        2,000,000       6.11       3/27/98    1,999,677
  6.34%                                                                        3,000,000       6.38       4/16/98    2,999,292
                                                                                                                  ------------
TOTAL CERTIFICATES OF DEPOSIT                                                                                       18,997,607

COMMERCIAL PAPER 82.0%
AESOP Funding Corporation (Acquired 7/24/97; Cost $3,476,923) (a)              3,500,000       5.52       9/05/97    3,498,390
Alamo Funding L.P. (Acquired 7/30/97; Cost $396,670) (a)                         400,000       5.55       9/22/97      398,767
AlliedSignal, Inc.                                                             2,000,000       5.54       9/24/97    1,993,229
AlliedSignal, Inc. (Acquired 8/22/97; Cost $1,822,744) (a)                     1,830,000       5.49       9/17/97    1,825,814
Alpine Securitization Corporation (Acquired 8/12/97; Cost $2,987,073) (a)      3,000,000       5.54       9/09/97    2,996,768
American Home Products Corporation (Acquired 8/29/97; Cost $2,998,140) (a)     3,000,000       5.58       9/02/97    3,000,000
Anaheim, California Electric System                                            3,500,000       5.60       9/02/97    3,500,000
Aon Corporation                                                                3,500,000       5.57       9/05/97    3,498,375
Aristar, Inc.                                                                  2,500,000       5.59       9/04/97    2,499,224
Astro Capital Corporation (Acquired 8/15/97; Cost $3,471,588) (a)              3,500,000       5.62      10/06/97    3,481,423
Avon Capital Corporation (Acquired 6/25/97; Cost $3,946,828) (a)               4,000,000       5.63       9/18/97    3,989,991
B.A.T. Capital Corporation                                                     1,800,000       5.56       9/18/97    1,795,552
Banner Receivables Corporation:
  (Acquired 8/01/97; Cost $1,490,717) (a)                                      1,500,000       5.57       9/10/97    1,498,143
  (Acquired 8/14/97; Cost $1,990,978) (a)                                      2,000,000       5.60       9/12/97    1,996,889
Barnett Banks, Inc.                                                            3,500,000       5.51       9/19/97    3,490,893
Barton Capital Corporation (Acquired 8/29/97; Cost $2,581,562) (a)             2,600,000       5.55      10/14/97    2,583,165
Brazos River Authority, Texas Pollution Control Revenue                        3,000,000       5.54       9/12/97    3,000,000
Budget Funding Corporation                                                     3,000,000       5.55      10/01/97    2,986,587
CSC Enterprises                                                                1,500,000       5.55      10/09/97    1,491,444
Calcot, Ltd.                                                                   3,000,000       5.60       9/24/97    2,989,733
Cigna Corporation                                                              2,000,000       5.58       9/23/97    1,993,490
                                                                               1,000,000       5.60       9/25/97      996,422
Cooper Industries, Inc.                                                        3,200,000       5.63       9/02/97    3,200,000
Countrywide Home Loans                                                         1,500,000       5.57       9/08/97    1,498,607
Delaware Funding Corporation (Acquired 8/19/97; Cost $1,787,155) (a)           1,791,000       5.52       9/02/97    1,791,000
Walt Disney Company                                                            4,000,000       5.57       9/02/97    4,000,000
Duke Capital Corporation (Acquired 8/29/97; Cost $3,497,811) (a)               3,500,000       5.63       9/02/97    3,500,000
Equitable of Iowa Companies                                                    3,300,000       5.56      10/02/97    3,284,710
Eureka Securitization, Inc. (Acquired 8/20/97; Cost $3,473,703) (a)            3,500,000       5.52      10/08/97    3,480,680
FP Funding Corporation (Acquired 8/05/97; Cost $2,985,147) (a)                 3,000,000       5.57       9/08/97    2,997,215
Finova Capital Corporation                                                     3,500,000       5.54       9/11/97    3,495,153
Franklin Resources, Inc.:
  (Acquired 8/11/97; Cost $1,494,480) (a)                                      1,500,000       5.52       9/04/97    1,499,540
  (Acquired 8/06/97; Cost $1,486,635) (a)                                      1,500,000       5.53      10/03/97    1,492,857
Frigate Funding Corporation (Acquired 8/04/97; Cost $3,477,338) (a)            3,500,000       5.55       9/15/97    3,492,985
Frontier Corporation (Acquired 8/22/97; Cost $3,492,985) (a)                   3,500,000       5.55       9/04/97    3,498,921
Fundex Corporation                                                             3,544,000       5.58       9/10/97    3,539,605
GTE Corporation                                                                3,000,000       5.54       9/26/97    2,988,920
General Electric Capital Corporation                                           3,000,000       5.53       1/14/98    2,938,248
Goldman Sachs Group LP                                                         3,000,000       5.53       9/09/97    2,996,774
Gotham Funding Corporation (Acquired 8/07/97; Cost $1,990,098) (a)             2,000,000       5.57       9/08/97    1,998,143
Green Tree Financial Corporation                                               3,000,000       5.69       9/03/97    2,999,526
Harris County, Texas Industrial Development Corporation
  Solid Waste Disposal Revenue (Acquired 8/18/97; Cost $3,000,000) (a)         3,000,000       5.58       9/08/97    3,000,000
Heller Financial, Inc.                                                         3,000,000       5.65       9/17/97    2,992,938
Household International, Inc. (Acquired 7/23/97; Cost $2,980,680) (a)          3,000,000       5.52       9/03/97    2,999,540
Industrial Funding Corporation                                                 1,500,000       5.60       9/02/97    1,500,000
International Securitization Corporation:
  (Acquired 8/07/97; Cost $896,136) (a)                                          900,000       5.52       9/04/97      899,724
  (Acquired 8/21/97; Cost $1,992,012) (a)                                      2,000,000       5.53       9/16/97    1,995,699
Johnson Controls, Inc.                                                            71,100       5.22    Upon Demand      71,100
Knight-Ridder, Inc.                                                            1,190,000       5.60       9/23/97    1,186,113
Korea Development Bank                                                         3,500,000       5.77       9/18/97    3,491,024
LaSalle National Bank                                                          1,000,000       5.52      10/08/97      994,480
Lexington Parker Capital Corporation (Acquired 8/13/97; Cost $2,987,050) (a)   3,000,000       5.55       9/10/97    2,996,300
MEPC Finance, Inc. (Acquired 8/01/97; Cost $2,483,725) (a)                     2,500,000       5.58       9/12/97    2,496,125

                                            See notes to financial statements.
</TABLE>
4
<PAGE>
<TABLE>
<CAPTION>


                                                                               PRINCIPAL     YIELD TO     MATURITY     AMORTIZED
                                                                                AMOUNT       MATURITY     DATE (b)   COST (NOTE 2)
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                           <C>              <C>       <C>      <C>      
Martin Marietta Materials, Inc. (Acquired 7/03/97; Cost $2,971,228) (a)       $3,000,000       5.66%      9/02/97 $  3,000,000
Matson Navigation Company, Inc.                                                3,000,000       5.50      10/07/97    2,983,958
Merrill Lynch & Company, Inc.                                                    350,000       5.52       9/10/97      349,571
                                                                               1,630,000       5.52       9/11/97    1,627,751
Monsanto Company                                                               3,500,000       5.50      11/07/97    3,464,708
Newell Company (Acquired 8/29/97; Cost $3,482,194) (a)                         3,500,000       5.55      10/01/97    3,484,352
Oakland-Alameda County, California Coliseum Authority                          3,500,000       5.56      10/02/97    3,500,000
Old Line Funding Corporation:
  (Acquired 8/18/97; Cost $995,691) (a)                                        1,000,000       5.54       9/15/97      997,999
  (Acquired 8/11/97; Cost $995,529) (a)                                        1,000,000       5.55       9/09/97      998,921
  (Acquired 8/14/97; Cost $995,067) (a)                                        1,000,000       5.55       9/15/97      997,996
PG&E Corporation (Acquired 8/21/97; Cost $2,282,430) (a)                       2,300,000       5.50      10/10/97    2,286,647
Philip Morris Capital Corporation                                              3,500,000       5.53       9/02/97    3,500,000
SRD Finance, Inc.                                                              3,000,000       5.60      10/02/97    2,986,000
SAFECO Credit Company, Inc.                                                    3,500,000       5.57       9/10/97    3,495,668
Salomon, Inc.                                                                  3,500,000       5.61       9/02/97    3,500,000
Sanwa Business Credit Corporation                                              3,000,000       5.60       9/11/97    2,995,800
Seiko Corporation of America                                                   1,000,000       5.63      10/09/97      994,214
Sigma Finance, Inc. (Acquired 8/29/97; Cost $1,981,808) (a)                    2,000,000       5.55      10/27/97    1,983,042
Smith Barney Holdings, Inc.                                                    3,000,000       5.52      10/03/97    2,985,740
Sony Capital Corporation (Acquired 8/22/97; Cost $3,407,696) (a)               3,415,000       5.50       9/05/97    3,413,435
Southern California Gas Company (Acquired 8/22/97; Cost $1,665,152) (a)        1,670,000       5.50       9/10/97    1,667,959
Strait Capital Corporation                                                     1,000,000       5.60      10/15/97      993,311
                                                                               2,474,000       5.60      10/31/97    2,451,294
Strategic Asset Funding Corporation (Acquired 8/08/97; Cost $3,207,014) (a)    3,223,000       5.58       9/09/97    3,219,503
Tambrands, Inc.                                                                2,000,000       5.80      10/07/97    1,988,722
Torchmark Corporation                                                          3,300,000       5.55       9/05/97    3,298,474
Tribune Company (Acquired 8/25/97; Cost $2,346,015) (a)                        2,350,000       5.55       9/05/97    2,348,913
Tri-Lateral Capital, Inc. (Acquired 8/20/97; Cost $3,331,901) (a)              3,349,000       5.57       9/22/97    3,338,637
Triple-A One Funding Corporation (Acquired 8/21/97; Cost $1,999,160) (a)       2,009,000       5.51       9/22/97    2,002,850
UNIfunding, Inc.                                                               4,400,000       5.70      11/12/97    4,350,537
Variable Funding Capital Corporation:
  (Acquired 8/06/97; Cost $1,463,677) (a)                                      1,470,000       5.53       9/03/97    1,469,774
  (Acquired 7/17/97; Cost $1,333,803) (a)                                      1,345,000       5.55       9/09/97    1,343,549
Wisconsin Electric Power Company                                                 202,700       5.24    Upon Demand     202,700
Wood Street Funding Corporation (Acquired 8/19/97; Cost $1,992,627) (a)        2,000,000       5.53       9/12/97    1,996,928
Working Capital Management Company, Limited Partnership
  (Acquired 8/18/97; Cost $3,479,422) (a)                                      3,500,000       5.57       9/25/97    3,487,545
Xerox Corporation                                                              3,500,000       5.48       9/22/97    3,489,344
                                                                                                                  ------------
TOTAL COMMERCIAL PAPER                                                                                             222,016,068

CORPORATE OBLIGATIONS 1.9%
General Motors Acceptance Corporation Medium Term Notes, Tranche #598, 7.50%   3,000,000       5.85      11/04/97    3,008,521
Johnson Controls, Inc. Medium Term Notes, Tranche #8, 7.18%                    2,000,000       6.04      10/03/97    2,001,972
                                                                                                                  ------------  
TOTAL CORPORATE OBLIGATIONS                                                                                          5,010,493

TAXABLE VARIABLE RATE PUT BONDS 7.7%
Alabama State Industrial Development Authority Industrial Development Revenue  1,800,000       5.70       9/04/97    1,800,000
Bel Aire, LLC                                                                  2,160,000       5.70       9/04/97    2,160,000
Berks County, Pennsylvania Industrial Development Authority Industrial 
  Development Revenue                                                          2,460,000       5.75       9/03/97    2,460,000
Gardena, California First-Time Homebuyer Refunding Program                     1,285,000       5.85       9/03/97    1,285,000
Maine Regional Waste System, Inc. Solid Waste Resource Recovery Revenue         280,000        5.65       9/03/97      280,000
Nufunding, Inc. Adjustable Rate Taxable Health Care Revenue                    5,000,000       5.73       9/03/97    5,000,000
Tifton Mall, Inc.                                                              1,950,000       5.70       9/04/97    1,950,000
Virginia Housing Development Authority Multi-Family Housing Revenue            2,900,000       5.73       9/02/97    2,900,000
WLB, LLC                                                                       2,000,000       5.70       9/04/97    2,000,000
West Hollywood, California Certificates of Participation - Capital Projects    1,175,000       5.80       9/04/97    1,175,000
                                                                                                                  ------------
TOTAL TAXABLE VARIABLE RATE PUT BONDS                                                                               21,010,000

UNITED STATES GOVERNMENT & AGENCY ISSUES 1.5%
Federal Home Loan Banks Consolidated Bonds, 5.78%                              4,000,000       5.78       1/28/98    4,000,000
                                                                                                                  ------------
TOTAL INVESTMENTS IN SECURITIES 100.1%                                                                             271,034,168
Other Assets and Liabilities, Net (0.1%)                                                                              (335,331)
                                                                                                                  ------------
NET ASSETS 100.0%                                                                                                 $270,698,837
                                                                                                                  ============

                                                                                                                             5
                                            See notes to financial statements.
</TABLE>
                                                                                
<PAGE>


SCHEDULE OF INVESTMENTS IN SECURITIES (continued)    August 31, 1997 (Unaudited)
- --------------------------------------------------------------------------------

                                                 PERCENTAGE OF
INDUSTRY DIVERSIFICATION                           NET ASSETS
- --------------------------------------------------------------------------------
Non-Agency Asset-Backed ............................  22.5%
Bank - Super Regional ..............................   6.5
Brokerage & Investment Management ..................   5.3
Bank - Regional ....................................   5.1
Industrial Development Revenue .....................   4.7
Personal & Commercial Lending ......................   4.6
Finance - Miscellaneous ............................   4.4
Insurance - Diversified ............................   2.4
Insurance - Life ...................................   2.4
Pollution Control Revenue ..........................   2.3
Cosmetic & Personal Care ...........................   2.2
Diversified Operations .............................   2.2
Electric Power .....................................   2.2
Real Estate ........................................   2.0
Tobacco ............................................   2.0
General Obligation .................................   1.7
Healthcare - Patient Care ..........................   1.7
Mortgage & Related Service .........................   1.7
FHLMC ..............................................   1.5
Leisure Product ....................................   1.5
Chemical ...........................................   1.3
Household Appliances & Furnishings .................   1.3
Insurance - Property & Casualty ....................   1.3
Media - Publishing .................................   1.3
Office Automation ..................................   1.3
Single Family Mortgage Revenue .....................   1.3
Telecommunication Service ..........................   1.3
Machinery - Miscellaneous ..........................   1.2
Agricultural Operations ............................   1.1
Automobile .........................................   1.1
Electrical Equipment ...............................   1.1
Healthcare - Drug/Diversified ......................   1.1
Metals & Mining ....................................   1.1
Shipping ...........................................   1.1
Telephone ..........................................   1.1
Savings & Loan .....................................   0.9
Other Revenue ......................................   0.7
Computer Service ...................................   0.6
Gas Utility ........................................   0.6
Consumer - Miscellaneous ...........................   0.4
Other Assets and Liabilities, Net ..................  (0.1)
                                                     -----
Total                                                100.0%
                                                     =====


LEGEND
- ------
(a) Restricted security.
(b) Maturity date represents  actual maturity or the longer of the next put date
    or interest adjustment date. For U.S. Government Agency Securities, maturity
    date represents actual maturity or the next interest adjustment date.

    Percentages are stated as a percent of net assets.



STATEMENT OF ASSETS AND LIABILITIES
- --------------------------------------------------------------------------------
August 31, 1997 (Unaudited)

ASSETS:
   Investments in Securities, at Amortized Cost             $271,034,168
   Interest Receivable                                           923,603
   Other Assets                                                  115,571
                                                            ------------
   Total Assets                                              272,073,342

LIABILITIES:
   Dividends Payable                                           1,252,636
   Accrued Operating Expenses and Other Liabilities              121,869
                                                            ------------
   Total Liabilities                                           1,374,505
                                                            ------------
NET ASSETS                                                  $270,698,837
                                                            ============
NET ASSETS CONSIST OF:
   Capital Stock (par value and paid-in capital)            $270,698,837
                                                            ============

Capital Shares Outstanding (Unlimited Number Authorized)     270,698,837

NET ASSET VALUE PER SHARE                                          $1.00
                                                                   =====

                       See notes to financial statements.

6
<PAGE>


STATEMENT OF OPERATIONS
- --------------------------------------------------------------------------------
For the Six Months Ended August 31, 1997 (Unaudited)


INTEREST INCOME                                                $8,762,798
EXPENSES:
   Investment Advisory Fees                                       538,436
   Custodian Fees                                                  15,765
   Shareholder Servicing Costs                                     49,110
   Federal and State Registration Fees                             32,100
   Other                                                           20,728
                                                               ----------
   Total Expenses before Waivers and Absorptions by Advisor       656,139
   Voluntary Expense Waivers and Absorptions by Advisor          (332,249)
                                                               ----------
   Expenses, Net                                                  323,890
                                                               ----------
NET INVESTMENT INCOME                                          $8,438,908
                                                               ==========
<TABLE>
STATEMENT OF CHANGES IN NET ASSETS
- --------------------------------------------------------------------------------------------------------------------
<CAPTION>


                                                                            SIX MONTHS ENDED          YEAR ENDED
                                                                             AUGUST 31, 1997         FEB. 28, 1997
                                                                             ---------------        --------------
                                                                               (UNAUDITED)
<S>                                                                           <C>                    <C>    
OPERATIONS:
   Net Investment Income                                                      $  8,438,908           $   10,026,949
   Net Realized Loss                                                                    --               (2,448,005)
                                                                              ------------           --------------
   Increase in Net Assets Resulting from Operations                              8,438,908                7,578,944

DISTRIBUTIONS:
   From Net Investment Income                                                   (8,438,908)             (10,026,949)

CAPITAL SHARE TRANSACTIONS:
    Proceeds from Shares Sold                                                  575,911,877            1,126,703,545
    Proceeds from Reinvestment of Dividends                                      4,966,079                6,979,994
    Payment for Shares Redeemed                                               (590,014,593)            (981,308,685)
                                                                              ------------           --------------
    Increase (Decrease) in Net Assets from Capital Share Transactions           (9,136,637)             152,374,854
                                                                              ------------           --------------
TOTAL INCREASE (DECREASE) IN NET ASSETS                                         (9,136,637)             149,926,849

CAPITAL CONTRIBUTION (NOTE 4)                                                           --                2,448,005

NET ASSETS:
   Beginning of Period                                                         279,835,474              127,460,620
                                                                              ------------           --------------
   End of Period                                                              $270,698,837           $  279,835,474
                                                                              ============           ==============

TRANSACTIONS IN SHARES OF THE FUND:
   Sold                                                                        575,911,877            1,126,703,545
   Issued in Reinvestment of Distributions                                       4,966,079                6,979,994
   Redeemed                                                                   (590,014,593)            (981,308,685)
                                                                              ------------           --------------
   Increase (Decrease) in Shares of the Fund                                    (9,136,637)             152,374,854
                                                                              ============           ==============

                                            See notes to financial statements.

                                                                                                                  7           
</TABLE>
<PAGE>


NOTES TO FINANCIAL STATEMENTS
- --------------------------------------------------------------------------------
August 31, 1997 (Unaudited)

1.  ORGANIZATION
    The Strong  Institutional  Money Fund commenced  operations on September 21,
    1995, and is a diversified  series of Strong  Institutional  Funds, Inc., an
    open-end  management  investment  company  registered  under the  Investment
    Company Act of 1940.

2.  SIGNIFICANT ACCOUNTING POLICIES
    The following is a summary of significant  accounting  policies  followed by
    the  Fund in the  preparation  of its  financial  statements.  

     (A)  Security  Valuation -- Investments are valued using the amortized cost
          method,  which  approximates  fair value.  Amortized  cost for Federal
          income tax and financial reporting purposes is the same. 

          The Fund owns certain investment securities which are restricted as to
          resale.  These  securities  are  valued by the Fund  after  giving due
          consideration  to pertinent  factors,  including recent private sales,
          market  conditions and the issuer's  financial  performance.  The Fund
          generally bears the costs, if any,  associated with the disposition of
          restricted  securities.   Aggregate  cost  and  fair  value  of  these
          restricted  securities  at  August  31,  1997  were  $101,118,592  and
          $101,446,129,  respectively,  representing  37.5% of the net assets of
          the Fund. Of these securities,  which are restricted as to resale, all
          are Section 4(2) commercial  paper or are eligible for resale pursuant
          to Rule  144A  under  the  Securities  Act of 1933 and also  have been
          determined  to  be  liquid  by  the  Advisor  based  upon   guidelines
          established by the Fund's Board of Directors.

     (B)  Federal Income and Excise Taxes and  Distributions  to Shareholders --
          It is the  Fund's  policy  to  comply  with  the  requirements  of the
          Internal Revenue Code applicable to regulated investment companies and
          to  distribute   substantially  all  of  its  taxable  income  to  its
          shareholders  in a manner  which  results  in no tax cost to the Fund.
          Accordingly, no federal income or excise tax provision is required.

     (C)  Use of  Estimates  --  The  preparation  of  financial  statements  in
          conformity  with generally  accepted  accounting  principles  requires
          management to make estimates and assumptions  that affect the reported
          amounts of assets and liabilities and disclosure of contingent  assets
          and  liabilities  at the  date of the  financial  statements,  and the
          reported  amounts  of  increases  and  decreases  in net  assets  from
          operations  during the reporting  period.  Actual results could differ
          from those estimates.

     (D)  Other -- Investment  security  transactions  are recorded on the trade
          date.  Dividend  distributions  to  shareholders  are  recorded on the
          ex-dividend date. Interest income is recorded on the accrual basis and
          includes amortization of premiums and discounts.

3.  RELATED PARTY TRANSACTIONS
    Strong Capital Management,  Inc. (the "Advisor"), with whom certain officers
    and  directors  of the Fund are  affiliated,  provides  investment  advisory
    services and shareholder recordkeeping and related services to the Fund. The
    investment  advisory  fee,  which is  established  by terms of the  Advisory
    Agreement,  is based on an annualized  rate of .35% of the average daily net
    assets  of the Fund.  Advisory  fees are  subject  to  reimbursement  by the
    Advisor if the Fund's operating expenses exceed certain levels.  Shareholder
    recordkeeping   and  related   service  fees  are  based  on   contractually
    established rates for each open and closed shareholder account. In addition,
    the Advisor is  compensated  for  certain  other  services  related to costs
    incurred for reports to shareholders.

    The amount  payable  to the  Advisor  at August  31,  1997 and  unaffiliated
    directors'  fees  for  the  period  then  ended  were  $96,040  and  $2,373,
    respectively.

    Funds sponsored and managed by the Advisor may invest cash reserves in money
    market funds also  sponsored and managed by the Advisor,  subject to certain
    limitations.  The  terms  of such  transactions  are  identical  to those of
    non-related  entities  except that, to avoid duplicate  investment  advisory
    fees,  the Advisor remits to each Fund an amount equal to all fees otherwise
    due to them  under  their  investment  advisory  agreement  for  the  assets
    invested in such money  market  funds.  Funds  sponsored  and managed by the
    Advisor own 33.8% of the Fund as of August 31, 1997.

4.  CAPITAL CONTRIBUTION
    On January  31,  1997,  the Advisor  purchased a security  from the Fund for
    $2,448,005  in excess of the  security's  fair  value.  The Fund  recorded a
    realized loss on the sale and a capital contribution of an equal amount from
    the  Advisor.   The  Advisor  received  no  shares  of  the  Fund  or  other
    consideration  in exchange  for such  contribution.  For tax  purposes,  the
    capital contribution reduced the realized losses for the year ended February
    28, 1997.

<TABLE>
<CAPTION>

FINANCIAL HIGHLIGHTS
- -----------------------------------------------------------------------------------------------------------------------------
                                                                SELECTED PER-SHARE DATA (a)
                    ---------------------------------------------------------------------------------------------------------
                                  INCOME FROM INVESTMENT OPERATIONS         LESS DISTRIBUTIONS                     
                                --------------------------------------   -------------------------                                  
                    Net Asset               Net Realized      Total                                                 Net Asset  
                     Value,        Net         Losses          From       From Net                      Capital       Value,
                    Beginning   Investment       on         Investment   Investment      Total       Contribution     End of        
                     Period       Income     Investments    Operations     Income    Distributions     (Note 4)       Period

<S>                  <C>          <C>          <C>            <C>         <C>           <C>              <C>          <C>      
Aug. 31, 1997 (b)    $1.00        $0.03          --           $0.03       ($0.03)       ($0.03)           --          $1.00    
Feb. 28, 1997         1.00         0.05        ($0.01)         0.04        (0.05)        (0.05)          $0.01         1.00         
Feb. 29, 1996 (c)     1.00         0.03          --            0.03        (0.03)        (0.03)           --           1.00    

</TABLE>

FINANCIAL HIGHLIGHTS (Continued)
- --------------------------------------------------------------------------------
 
                                   RATIOS AND SUPPLEMENTAL DATA                 
                    ------------------------------------------------------------
                              Net                 Ratio of Expenses Ratio of Net
                             Assets,     Ratio of   to Average Net   Investment 
                             End of      Expenses   Assets Without     Income   
                    Total  Period (In   to Average    Waivers and    to Average
                    Return  Millions)   Net Assets    Absorptions    Net Assets
                                                 
Aug. 31, 1997 (b)   +2.8%     $271         0.2%*          0.4%*         5.5%* 
Feb. 28, 1997       +5.5%(d)   280         0.2%           0.5%          5.4%    
Feb. 29, 1996 (c)   +2.6%      127         0.2%*          0.4%*         5.6%*   



 *   Calculated on an annualized basis.
(a)  Information  presented  relates  to a share  of  capital  stock of the Fund
     outstanding for the entire period.
(b)  For the six months ended August 31, 1997  (Unaudited).  Total return is not
     annualized.
(c)  For the period from  September 21, 1995  (inception)  to February 29, 1996.
     Total return is not annualized.
(d)  Had the Advisor not made the capital contribution as described in the notes
     to the financial statements, the adjusted total return would have been 4.8%
     for the fiscal year ended February 28, 1997.

8
<PAGE>

                                    DIRECTORS
                                Richard S. Strong
                                 Willie D. Davis
                                 Stanley Kritzik
                                Marvin E. Nevins
                                 William F. Vogt

                                    OFFICERS
                    Richard S. Strong, Chairman of the Board
                       Lawrence A. Totsky, Vice President
                         Thomas P. Lemke, Vice President
                         John S. Weitzer, Vice President
              Stephen J. Shenkenberg, Vice President and Secretary
                           John A. Flanagan, Treasurer

                               INVESTMENT ADVISOR
                         Strong Capital Management, Inc.
                    P.O. Box 2936, Milwaukee, Wisconsin 53201

                                    CUSTODIAN
                              Firstar Trust Company
                    P.O. Box 701, Milwaukee, Wisconsin 53201

                                     AUDITOR
                            Coopers & Lybrand L.L.P.
              411 East Wisconsin Avenue, Milwaukee, Wisconsin 53202

                                  LEGAL COUNSEL
                              Godfrey & Kahn, S.C.
               780 North Water Street, Milwaukee, Wisconsin 53202

<PAGE>

For a prospectus containing more complete information, including management fees
and  expenses,  please  call  1-800-733-2274.  Please read it  carefully  before
investing or sending  money.  This report does not  constitute  an offer for the
sale of securities. Strong Funds are offered for sale by prospectus only.







                                 [STRONG LOGO]
                        STRONG FUNDS DISTRIBUTORS, INC.
                   P.O. Box 782 o Milwaukee, Wisconsin 53201             6028H97





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