LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
N-30B-2, 1995-10-11
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<PAGE>
   S E M I - A N N U A L R E P O R T
 
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                                             J U L Y 3 1, 1 9 9 5
 
                                LEHMAN BROTHERS
                              INSTITUTIONAL FUNDS
                                  GROUP TRUST
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
President's Letter......................................................     1
Portfolios of Investments:
  Prime Money Market Fund...............................................     3
  Prime Value Money Market Fund.........................................     6
  Government Obligations Money Market Fund..............................     9
  Cash Management Fund..................................................    10
  Treasury Instruments Money Market Fund II.............................    11
  100% Treasury Instruments Money Market Fund...........................    12
  Tax-Free Money Market Fund............................................    13
  Municipal Money Market Fund...........................................    18
Statements of Assets and Liabilities....................................    28
Statements of Operations................................................    32
Statements of Changes in Net Assets.....................................    34
Financial Highlights:
  Prime Money Market Fund...............................................    38
  Prime Value Money Market Fund.........................................    40
  Government Obligations Money Market Fund..............................    42
  Cash Management Fund..................................................    44
  Treasury Instruments Money Market Fund II.............................    46
  100% Treasury Instruments Money Market Fund...........................    48
  Tax-Free Money Market Fund............................................    49
  Municipal Money Market Fund...........................................    50
Notes to Financial Statements...........................................    51
</TABLE>
<PAGE>
Dear Shareholders:
 
    We  are pleased  to present the  Semi-Annual Report for  the Lehman Brothers
Institutional Funds Group  Trust (the  "Trust") for  the period  ended July  31,
1995. This Report includes the portfolio holdings for the Prime, Government, and
Tax-Exempt  Money Market Funds currently offered  by the Trust that are designed
to meet the cash management and liquidity needs of institutional investors.
 
THE ECONOMY
 
    Since our  last report,  the  pace of  economic  growth decelerated  in  two
distinct  stages  and, ultimately,  led  to a  reversal  of the  Federal Reserve
Board's ("Fed") monetary policy and a  decline in interest rates. Following  the
very  strong 5.1% growth of Gross Domestic Product ("GDP") in the fourth quarter
of 1994, the slower but still healthy 2.8% rate experienced in the first quarter
of 1995 was viewed to be more sustainable. The initial estimates of 2.0% to 2.5%
GDP growth for the second quarter of  1995, however, proved to be optimistic  in
light  of  the  surprisingly  weak economic  data,  particularly  in employment,
housing, and  consumer durables.  The stream  of data  was so  anemic that  many
observers felt that the desired "soft landing" scenario would turn into a rather
bumpy one and could unravel into a classic recession. At the same time, rates of
inflation remained manageable. These conditions enabled the fixed-income markets
to  continue  a powerful  rally  on the  belief  that the  next  monetary policy
decision by the Fed would be to ease the availability of credit in an effort  to
revive  the economy.  During the  first six  months of  1995, interest  rates of
various maturities fell in  a range from  50 basis points  to 150 basis  points,
including  the Fed's July 6, 1995 easing operation of 25 basis points, which was
the first time the Fed reduced rates since 1992. It was ironic that  significant
signs  of economic strength  began to emerge immediately  after the Fed's action
and this led  some commentators to  suggest that  the easing may  not have  been
necessary in order to sustain a modest pace of growth.
 
LOOKING FORWARD
 
    The  critical question that  fixed-income investors now  face relates to the
extent of the rebound in consumer spending and whether it will translate into  a
resumption  of faster  production rates and  the attendant  employment gains. We
subscribe to forecasts supporting a modestly improving economy (2.0% to 2.5% GDP
growth in the second half of 1995) following a small gain in the second  quarter
of  1995 (1.0% or less). We believe that the Fed has so far orchestrated a "soft
landing" and will  continue to  pursue that strategy  with a  gradual easing  of
short-term  interest rates of 25 basis points  every three months or so from the
current Fed  Funds rate  of 5.75%.  This strategy  should encourage  consumption
without  igniting  inflation. We  believe long-term  rates, which  are currently
around 6.90%, will most likely trade in a range between 6.25% and 7.25% over the
next six months.
 
PORTFOLIO STRATEGY AND PERFORMANCE RESULTS
 
    During the period from January to April, 1995, the average maturities of the
TAXABLE MONEY MARKET FUNDS were significantly extended in order to lock in  six-
to  twelve-month  rates which  were beginning  to fall  as evidence  of economic
weakness became more apparent.  By May, the  market had factored  in a 50  basis
point  increase  in  rates  by  the  Fed  and  further  extensions  became  less
attractive. As of this writing, average maturities are being held in a range  of
about 40 to 60 days.
 
    The  single most influential factor in  the tax-exempt money market has been
the supply of variable rate demand  paper. When supply has been thin,  typically
as  maturity proceeds and coupon  payments enter the market  in the beginning of
each month, yields on variable rate securities  have been driven down as low  as
1.90%  to  2.00%. Conversely,  when  supply of  this  paper has  been plentiful,
typically at mid-month,  yields have  climbed as high  as 4.00%  to 4.10%.  This
extreme  rate of volatility has caused wide  swings in the returns of tax-exempt
money market funds in  general, a trend  which we believe  will continue in  the
future.
 
                                       1
<PAGE>
    We  have been hedging, to the  fullest extent possible, the TAX-EXEMPT MONEY
MARKET FUNDS from these yield swings  by forsaking variable interest rate  paper
in  favor of longer, fixed-rate notes. This  strategy has allowed us not only to
smooth out  returns but  also to  maintain a  favorable position  vis-a-vis  our
portfolio  maturities  in  the  declining  interest  rate  environment  that has
recently developed.
 
    The Trust continued to  perform well when compared  with other money  market
funds  offered to the institutional investor.  For example, based on their July,
1995 monthly yield, PRIME VALUE MONEY MARKET  FUND CLASS A was ranked third  and
PRIME  MONEY MARKET FUND CLASS A was tied  for fourth place out of the 267 First
and Second Tier Institutional Only  Funds tracked by IBC/Donoghue, Inc.'s  MONEY
FUND  REPORT-REGISTERED TRADEMARK- ("IBC/ Donoghue"). The GOVERNMENT OBLIGATIONS
MONEY MARKET FUND  CLASS A  monthly yield  for July  resulted in  a third  place
ranking   among  the   147  Government-Only   Institutional  Funds   tracked  by
IBC/Donoghue. The MUNICIPAL MONEY MARKET FUND CLASS A and TAX-FREE MONEY  MARKET
FUND  CLASS A were the number one- and two-ranked funds, respectively, of the 59
Tax-Free Institutional Funds  reporting to  IBC/Donoghue. Each of  the Funds  is
waiving a portion of its investment advisory and/or administrative fees, as more
fully  described in the attached Report, and yields would have been lower if the
waivers had not been in effect. And of course, past performance is no  guarantee
of future results.
 
                                    *  *  *
 
    We  at Lehman Brothers  look forward to your  continued support. Our ongoing
goal is to provide  you with superior  products and services  to meet your  cash
management investment needs.
 
Sincerely,
 
Andrew D. Gordon
PRESIDENT
 
September 22, 1995
 
                                       2
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
July 31, 1995 (unaudited)
 
                            PRIME MONEY MARKET FUND
 
<TABLE>
<CAPTION>
     FACE                                                   INTEREST    MATURITY        VALUE
    VALUE                                                    RATE+        DATE         (NOTE 1)
 ------------                                               --------   ----------   --------------
 <C>           <S>                                          <C>        <C>          <C>
               BANK/CORPORATE NOTES -- 31.8%
 $ 50,000,000  American Express Centurion Bank, Variable
                Rate......................................    5.875%      3/15/96   $   50,000,000
   40,000,000  American Express Centurion Bank, Variable
                Rate......................................    6.125       4/12/96       40,000,000
   25,000,000  American Express Centurion Bank, Variable
                Rate......................................    6.062        5/9/96       25,000,000
   25,000,000  American Express Centurion Bank, Variable
                Rate......................................    5.875       6/21/96       25,000,000
   30,000,000  Bear Stearns Companies, Inc................    7.070       2/26/96       30,000,000
   50,000,000  Bear Stearns Companies, Inc., Variable
                Rate......................................    5.925      12/29/95       50,000,000
   30,000,000  Bear Stearns Companies, Inc., Variable
                Rate......................................    6.220        2/9/96       30,000,000
   20,000,000  Bear Stearns Companies, Inc., Variable
                Rate......................................    7.070       2/23/96       20,000,000
   50,000,000  Bear Stearns Companies, Inc., Variable
                Rate......................................    6.100       6/17/96       50,000,000
   50,000,000  Beta Finance Inc.**........................    6.830       3/15/96       50,000,000
   50,000,000  Beta Finance Inc.**........................    6.200       6/26/96       50,000,000
  100,000,000  Beta Finance Inc.**........................    5.970       7/17/96      100,000,000
   50,000,000  Beta Finance Inc., Variable Rate**.........    6.075      11/22/95       49,990,797
   50,000,000  CIT Group Holdings, Inc., Variable Rate....    6.200       1/12/96       49,993,259
   20,000,000  CS First Boston, Inc., Variable Rate**.....    6.300        2/9/96       20,000,000
   25,000,000  CS First Boston, Inc., Variable Rate**.....    6.300       2/26/96       25,000,000
   50,000,000  FCC National Bank, Delaware, Variable
                Rate......................................    6.200       1/17/96       49,993,285
   50,000,000  FCC National Bank, Delaware, Variable
                Rate......................................    6.050       4/11/96       49,982,650
   15,000,000  First of America Bank, Michigan............    6.350       1/22/96       15,008,307
   10,000,000  First of America Bank, Michigan............    6.730       1/30/96       10,021,023
   25,000,000  First National Bank Maryland...............    6.470        8/8/95       24,999,858
   10,000,000  Ford Motor Credit Company..................    6.150      12/18/95        9,993,594
   10,000,000  General Electric Capital Corporation.......    6.550       3/25/96       10,035,021
   40,000,000  Goldman Sachs Group, L.P., Variable
                Rate**....................................    5.963        2/2/96       40,000,000
   25,000,000  Huntington National Bank...................    6.970      10/16/95       25,001,101
   40,000,000  Merrill Lynch & Company, Inc., Variable
                Rate......................................    6.013        9/8/95       40,000,000
   25,000,000  Morgan Guaranty Trust Company..............    5.990       7/18/96       25,000,000
   25,000,000  NationsBank of Texas.......................    7.050        2/8/96       25,000,000
   35,000,000  NBD Bank N.A...............................    6.300       8/31/95       34,999,089
  100,000,000  NBD Bank N.A...............................    6.420       4/18/96      100,009,003
   44,000,000  Paccar Financial Corporation...............    6.300       5/14/96       44,023,415
   25,000,000  PHH Corporation, Variable Rate.............    6.200       1/19/96       24,996,662
   50,000,000  Sigma Finance Corporation**................    5.960       7/17/96       50,000,000
   35,000,000  SMM Trust 1994-D, Variable Rate**..........    5.984      10/27/95       35,000,000
  161,500,000  SMM Trust 1995-I, Variable Rate**..........    6.083       5/29/96      161,494,360
   35,700,000  Wachovia Bank of North Carolina, N.A.......    4.625       5/15/96       35,296,512
                                                                                    --------------
               TOTAL BANK/CORPORATE NOTES (COST $1,475,837,936)..................    1,475,837,936
                                                                                    --------------
               COMMERCIAL PAPER -- 22.8%
   50,000,000  AT&T Corporation...........................    6.170       8/28/95       49,768,624
   46,555,000  AT&T Corporation...........................    6.140       8/29/95       46,332,673
   55,000,000  AT&T Corporation...........................    5.600      12/11/95       53,870,667
   15,000,000  Ciesco, L.P................................    6.250        8/9/95       14,979,167
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       3
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                            PRIME MONEY MARKET FUND
<TABLE>
<CAPTION>
     FACE                                                   INTEREST    MATURITY        VALUE
    VALUE                                                    RATE+        DATE         (NOTE 1)
 ------------                                               --------   ----------   --------------
 <C>           <S>                                          <C>        <C>          <C>
               COMMERCIAL PAPER (CONTINUED)
 $ 25,000,000  CoreStates Capital Corporation.............    6.020%       2/5/96   $   25,000,000
   25,000,000  CS First Boston, Inc.***...................    6.270        9/5/95       24,847,605
   64,000,000  DuPont (E.I.) de Nemours & Company***......    5.780      10/13/95       63,249,885
   24,000,000  DuPont (E.I.) de Nemours & Company***......    5.850      11/29/95       23,532,000
   53,700,000  DuPont (E.I.) de Nemours & Company***......    5.700       12/8/95       52,603,178
   20,000,000  Falcon Asset Securitization
                Corporation***............................    6.275       9/12/95       19,853,583
   25,000,000  Ford Motor Credit Company..................    6.200       9/11/95       24,823,473
   25,000,000  General Electric Capital Corporation.......    6.350        8/8/95       24,969,132
   50,000,000  General Electric Capital Corporation.......    5.700       9/14/95       49,651,667
   30,000,000  General Electric Capital Corporation.......    6.500      11/10/95       29,452,917
   35,000,000  General Electric Capital Corporation.......    5.640       12/1/95       34,331,033
   25,000,000  General Electric Capital Corporation.......    6.230       12/1/95       24,472,181
   25,000,000  General Electric Capital Corporation.......    5.650      12/11/95       24,482,083
   50,000,000  Goldman Sachs Group, L.P...................    6.180        9/5/95       49,699,583
   50,000,000  Goldman Sachs Group, L.P...................    5.700      11/15/95       49,160,833
   50,000,000  Goldman Sachs Group, L.P...................    5.700      11/21/95       49,113,333
   25,000,000  McKenna Triangle National Corporation***...    6.260        8/7/95       24,973,916
   10,000,000  McKenna Triangle National Corporation***...    5.450      12/15/95        9,794,111
    8,000,000  McKenna Triangle National Corporation***...    5.500      12/15/95        7,833,778
   42,275,000  Monte Rosa Capital Corporation***..........    5.770       8/10/95       42,214,018
   34,564,000  Monte Rosa Capital Corporation***..........    5.750       8/11/95       34,508,794
   20,000,000  Toyota Motor Credit Corporation............    6.770       9/22/95       19,804,422
   10,000,000  Toyota Motor Credit Corporation............    6.160       10/2/95        9,893,911
   30,000,000  Toyota Motor Credit Corporation............    6.850       10/3/95       29,640,374
   25,000,000  Toyota Motor Credit Corporation............    6.375       11/6/95       24,570,572
   20,000,000  Toyota Motor Credit Corporation............    6.365       11/8/95       19,649,925
   36,800,000  U.S. Borax Inc.***.........................    6.230       8/30/95       36,615,314
   19,300,000  U.S. Borax Inc.***.........................    6.230        9/6/95       19,179,761
   12,000,000  U.S. Borax Inc.***.........................    6.100      10/27/95       11,823,100
   23,800,000  U.S. Borax Inc.***.........................    5.930       11/6/95       23,419,723
   11,200,000  U.S. Borax Inc.***.........................    5.950       11/8/95       11,016,740
                                                                                    --------------
               TOTAL COMMERCIAL PAPER (COST $1,059,132,076)......................    1,059,132,076
                                                                                    --------------
               CERTIFICATES OF DEPOSIT -- 2.4%
   63,000,000  Harris Trust & Savings Bank................    5.750        8/7/95       62,999,952
   50,000,000  Harris Trust & Savings Bank................    5.750       8/14/95       50,000,000
                                                                                    --------------
               TOTAL CERTIFICATES OF DEPOSIT (COST $112,999,952).................      112,999,952
                                                                                    --------------
               U.S. GOVERNMENT AGENCY NOTES -- 2.1%
   10,000,000  Federal Home Loan Bank, Variable Rate......    5.980        5/8/97++     10,013,339
   45,000,000  Federal National Mortgage Association,
                Variable Rate.............................    6.150      12/20/95       45,000,000
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       4
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                            PRIME MONEY MARKET FUND
 
<TABLE>
<CAPTION>
     FACE                                                   INTEREST    MATURITY        VALUE
    VALUE                                                     RATE        DATE         (NOTE 1)
 ------------                                               --------   ----------   --------------
 <C>           <S>                                          <C>        <C>          <C>
               U.S. GOVERNMENT AGENCY NOTES (CONTINUED)
 $ 40,000,000  Federal National Mortgage Association,
                Variable Rate.............................    6.350%      10/7/96++ $   40,000,000
                                                                                    --------------
               TOTAL U.S. GOVERNMENT AGENCY NOTES (COST $95,013,339).............       95,013,339
                                                                                    --------------
               REPURCHASE AGREEMENTS -- 40.9%
               Agreement with BZW Securities Inc. dated 7/31/95 bearing 5.900% to
                be repurchased at $100,016,389 on 8/1/95, collateralized by
                $127,878,000 of various mortgage-backed securities, with various
  100,000,000   maturities and interest rates (market value -- $102,003,917).....
                                                                                       100,000,000
               Agreement with Goldman Sachs Group, L.P. dated 7/31/95 bearing
                5.880% to be repurchased at $500,081,667 on 8/1/95,
                collateralized by $584,329,310 of various mortgage-backed
  500,000,000   securities, with various maturities and interest rates (market
                value -- $510,000,001)...........................................      500,000,000
               Agreement with Lehman Brothers Government Securities Inc. dated
                7/31/95 bearing 6.000% to be repurchased at $198,049,003 on
                8/1/95, collateralized by $283,749,139 of various Government
                National Mortgage Association Securities, with various maturities
  198,016,000   and interest rates (market value -- $201,957,201)................
                                                                                       198,016,000
               Agreement with Merrill Lynch Government Securities Inc. dated
                7/31/95 bearing 5.822% to be repurchased at $400,064,689 on
                8/1/95, collateralized by $417,280,623 of various mortgage-backed
  400,000,000   securities, with various maturities and interest rates (market
                value -- $408,000,915)...........................................      400,000,000
               Agreement with UBS Securities, Inc. dated 7/31/95 bearing 5.900%
                to be repurchased at $700,114,722 on 8/1/95, collateralized by
                $913,223,484 of various mortgage-backed securities, with various
  700,000,000   maturities and interest rates (market value -- $714,000,099).....
                                                                                       700,000,000
                                                                                    --------------
               TOTAL REPURCHASE AGREEEMENTS (COST $1,898,016,000)................    1,898,016,000
                                                                                    --------------
</TABLE>
 
<TABLE>
<S>                                                                       <C>       <C>
TOTAL INVESTMENTS (COST $4,640,999,303*)...............................    100.0%    4,640,999,303
OTHER ASSETS AND LIABILITIES (NET).....................................      0.0         1,821,332
                                                                          ------    --------------
NET ASSETS.............................................................    100.0%   $4,642,820,635
                                                                          ------    --------------
                                                                          ------    --------------
<FN>
- ------------------------
   * Aggregate cost for Federal tax purposes.
  ** Securities exempt from registration under Rule 144A of the Securities Act
     of 1933. These securities may be resold in transactions exempt from
     registration to qualified institutional buyers.
 *** Securities are exempt from registration under Section 4(2) of the
     Securities Act of 1933. These securities may be resold in transactions
     exempt from registration to qualified institutional buyers.
   + For Commercial Paper, the interest rate represents annualized yield at
     date of purchase.
  ++ Variable rate, resets daily.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       5
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JULY 31, 1995 (UNAUDITED)
 
                         PRIME VALUE MONEY MARKET FUND
 
<TABLE>
<CAPTION>
     FACE                                                   INTEREST    MATURITY        VALUE
    VALUE                                                    RATE+        DATE         (NOTE 1)
 ------------                                               --------   ----------   --------------
 <C>           <S>                                          <C>        <C>          <C>
               COMMERCIAL PAPER -- 35.4%
 $ 15,000,000  Atlantic Asset Securitization
                Corporation***............................    5.800%      8/11/95   $   14,975,833
   43,278,000  Atlantic Asset Securitization
                Corporation***............................    5.820       8/14/95       43,187,044
   14,575,000  Countrywide Funding Corporation............    5.800        8/8/95       14,558,562
   25,000,000  Countrywide Funding Corporation............    5.820        8/9/95       24,967,667
   10,000,000  Countrywide Funding Corporation............    5.820       8/10/95        9,985,450
   39,888,000  Countrywide Funding Corporation............    5.770       8/11/95       39,824,068
   39,700,000  Countrywide Funding Corporation............    5.820       8/18/95       39,590,891
   15,000,000  DuPont (E.I.) de Nemours & Company***......    5.750      11/28/95       14,714,896
   60,000,000  DuPont (E.I.) de Nemours & Company***......    6.090        1/9/96       58,365,850
   25,000,000  Ford Motor Credit Company..................    6.200       9/11/95       24,823,473
   50,000,000  Ford Motor Credit Company..................    5.650       9/29/95       49,537,014
   50,000,000  Ford Motor Credit Company..................    5.400       2/27/96       48,425,000
   25,000,000  General Electric Capital Corporation.......    6.350        8/8/95       24,969,131
   20,000,000  General Electric Capital Corporation.......    6.500      11/10/95       19,635,278
   35,000,000  General Electric Capital Corporation.......    5.640       12/1/95       34,331,033
   25,000,000  General Electric Capital Corporation.......    6.230       12/1/95       24,472,181
   25,000,000  General Electric Capital Corporation.......    5.650      12/11/95       24,482,083
   30,000,000  General Motors Acceptance Corporation......    6.450        8/7/95       29,967,750
   40,000,000  General Motors Acceptance Corporation......    6.260       8/15/95       39,902,623
   50,000,000  General Motors Acceptance Corporation......    5.970       11/6/95       49,195,709
   40,000,000  General Motors Acceptance Corporation......    5.540       12/8/95       39,205,933
   20,000,000  General Motors Acceptance Corporation......    5.550      12/26/95       19,546,750
   50,000,000  Goldman Sachs Group, L.P...................    5.700      11/21/95       49,113,333
   25,000,000  Goldman Sachs Group, L.P...................    5.740      11/21/95       24,553,556
   24,000,000  Lilly (Eli) & Company, Inc.................    6.080        1/8/96       23,351,466
   50,000,000  Nationwide Building Society................    5.730       9/12/95       49,665,750
   50,000,000  Nordbanken N.A.............................    5.720      10/13/95       49,420,055
   40,000,000  Postipankki U.S. Inc.......................    5.750       8/15/95       39,910,556
   30,000,000  Postipankki U.S. Inc.......................    6.210       9/11/95       29,787,825
   50,866,000  Ruby Asset Funding Corporation.............    5.750       9/29/95       50,386,659
   20,000,000  SFC (USA) Inc.***..........................    5.900        9/8/95       19,875,444
   39,259,000  Sierra Funding Corporation***..............    5.840      10/31/95       38,679,450
   50,000,000  Swedbank Inc...............................    6.190       8/10/95       49,922,625
   37,735,000  Swedbank Inc...............................    5.770       8/11/95       37,674,519
   40,000,000  Swedbank Inc...............................    5.810       11/9/95       39,354,445
   25,000,000  Toyota Motor Credit Corporation............    6.375       11/6/95       24,570,572
   18,875,000  Toyota Motor Credit Corporation............    6.365       11/8/95       18,544,616
                                                                                    --------------
               TOTAL COMMERCIAL PAPER (COST $1,233,475,090)......................    1,233,475,090
                                                                                    --------------
               BANK/CORPORATE NOTES -- 35.4%
   25,000,000  American Express Centurion Bank, Variable
                Rate......................................    6.062        5/9/96       25,000,000
   25,000,000  American Express Centurion Bank, Variable
                Rate......................................    5.879        7/8/96       25,000,000
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       6
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                         PRIME VALUE MONEY MARKET FUND
<TABLE>
<CAPTION>
     FACE                                                   INTEREST    MATURITY        VALUE
    VALUE                                                     RATE        DATE         (NOTE 1)
 ------------                                               --------   ----------   --------------
 <C>           <S>                                          <C>        <C>          <C>
               BANK/CORPORATE NOTES (CONTINUED)
 $ 75,000,000  Bank of New York, Delaware.................    5.960%      7/15/96   $   75,000,000
   10,000,000  Bear Stearns Companies, Inc................    7.070       2/23/96       10,000,000
   30,000,000  Bear Stearns Companies, Inc., Variable
                Rate......................................    6.220        2/9/96       30,000,000
   30,000,000  Bear Stearns Companies, Inc., Variable
                Rate......................................    6.083       2/26/96       30,000,000
   50,000,000  Bear Stearns Companies, Inc., Variable
                Rate......................................    6.100       6/17/96       50,000,000
   50,000,000  Bear Stearns Companies, Inc., Variable
                Rate......................................    5.975       7/12/96       50,000,000
   50,000,000  Beta Finance Inc.**........................    6.200       6/26/96       50,000,000
   30,000,000  Beta Finance Inc., Variable Rate**.........    6.075      11/22/95       29,994,478
   25,000,000  Comerica Bank..............................    7.500       1/17/96       25,052,199
   25,000,000  CS First Boston, Inc.**....................    6.300        2/9/96       25,000,000
   50,000,000  CS First Boston, Inc., Variable Rate**.....    5.988       1/26/96       50,000,000
   25,000,000  CS First Boston, Inc., Variable Rate**.....    6.175       2/26/96       25,000,000
   30,000,000  FCC National Bank, Delaware, Variable
                Rate......................................    6.200       1/17/96       29,995,971
   50,000,000  FCC National Bank, Delaware, Variable
                Rate......................................    6.050       4/11/96       49,982,650
   40,000,000  First Bank South Dakota....................    6.012        2/5/96       39,990,056
   25,000,000  First of America Bank, Illinois............    6.430      12/22/95       31,995,843
   25,000,000  First of America Bank, Michigan............    5.930      11/28/95       25,022,432
   25,000,000  First of America Bank, Michigan............    6.570       4/30/96       25,003,345
    5,000,000  General Motors Acceptance Corporation......    8.400      11/15/95        4,969,109
    6,000,000  General Motors Acceptance Corporation......    6.375       5/23/96        5,988,511
   40,000,000  Goldman Sachs Group, L.P.**................    5.938      11/24/95       40,000,000
   40,000,000  Goldman Sachs Group, L.P., Variable
                Rate**....................................    5.963        2/2/96       40,000,000
   25,000,000  Huntington National Bank...................    6.970      10/16/95       25,001,100
   40,000,000  Merrill Lynch & Company, Inc., Variable
                Rate......................................    6.013        9/8/95       40,000,000
   75,000,000  Morgan Guaranty Trust Company..............    5.990       7/18/96       75,000,000
   50,000,000  NationsBank of Texas.......................    5.650      12/11/95       50,000,000
   25,000,000  NationsBank of Texas.......................    7.050        2/8/96       25,000,000
   50,000,000  PHH Corporation, Variable Rate.............    6.200       1/19/96       49,993,324
   75,000,000  PNC Bank N.A...............................    6.450      12/12/95       75,009,105
   30,000,000  PNC Bank N.A., Variable Rate...............    5.825       5/20/96       29,988,356
   20,000,000  SMM Trust 1994-D, Variable Rate**..........    5.984      10/27/95       20,000,000
   50,000,000  SMM Trust 1995-I, Variable Rate**..........    5.895       6/17/96       49,985,880
                                                                                    --------------
               TOTAL BANK/CORPORATE NOTES (COST $1,232,972,359)..................    1,232,972,359
                                                                                    --------------
               CERTIFICATE OF DEPOSIT -- 1.4% (COST $50,000,524)
               YANKEE
   50,000,000  Norinchukin Bank...........................    5.810       9/12/95       50,000,524
                                                                                    --------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       7
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                         PRIME VALUE MONEY MARKET FUND
<TABLE>
<CAPTION>
     FACE                                                   INTEREST    MATURITY        VALUE
    VALUE                                                     RATE        DATE         (NOTE 1)
 ------------                                               --------   ----------   --------------
 <C>           <S>                                          <C>        <C>          <C>
               U.S. GOVERNMENT AGENCY OBLIGATION -- 0.9%   (COST
               $30,000,000)
 $ 30,000,000  Federal National Mortgage Association,
                Variable Rate.............................    6.350%      10/7/96++ $   30,000,000
                                                                                    --------------
               REPURCHASE AGREEMENTS -- 25.5%
               Agreement with Goldman Sachs Group, L.P. dated 7/31/95 bearing
                5.880% to be repurchased at $500,081,667 on 8/1/95,
                collateralized by $654,239,426 of various mortgage-backed
  500,000,000   securities, with various maturities and interest rates (market
                value -- $510,000,000)...........................................      500,000,000
               Agreement with J.P. Morgan Securities Inc. dated 7/31/95 bearing
                6.050% to be repurchased at $180,030,250 on 8/1/95,
                collateralized by $201,539,609 of various mortgage-backed
  180,000,000   securities, with various maturities and interest rates (market
                value -- $183,600,000)...........................................      180,000,000
               Agreement with Lehman Brothers Government Securities Inc. dated
                7/31/95 bearing 6.000% to be repurchased at $209,641,935 on
                8/1/95, collateralized by $1,286,955,672 of various
  209,607,000   mortgage-backed securities, with various maturities and interest
                rates (market value -- $213,782,348).............................      209,607,000
                                                                                    --------------
               TOTAL REPURCHASE AGREEMENTS (COST $889,607,000)...................      889,607,000
                                                                                    --------------
</TABLE>
 
<TABLE>
<S>                                                                       <C>       <C>
TOTAL INVESTMENTS (COST $3,436,054,973*)...............................     98.6%    3,436,054,973
OTHER ASSETS AND LIABILITIES (NET).....................................      1.4        48,745,001
                                                                          ------    --------------
NET ASSETS.............................................................    100.0%   $3,484,799,974
                                                                          ------    --------------
                                                                          ------    --------------
<FN>
- ------------------------
   * Aggregate cost for Federal tax purposes.
  ** Securities exempt from registration under Rule 144A of the Securities Act
     of 1933. These securities may be resold in transactions exempt from
     registration to qualified institutional buyers.
 *** Securities are exempt from registration under Section 4(2) of the
     Securities Act of 1933. These securities may be resold in transactions
     exempt from registration to qualified institutional buyers.
   + For Commercial Paper, the interest rate represents annualized yield at
     date of purchase.
  ++ Variable rate, resets daily.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       8
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JULY 31, 1995 (UNAUDITED)
 
                    GOVERNMENT OBLIGATIONS MONEY MARKET FUND
 
<TABLE>
<CAPTION>
     FACE                                                   INTEREST    MATURITY        VALUE
    VALUE                                                    RATE+        DATE         (NOTE 1)
 ------------                                               --------   ----------   --------------
 <C>           <S>                                          <C>        <C>          <C>
               U.S. GOVERNMENT AGENCY OBLIGATIONS -- 62.9%
               FEDERAL HOME LOAN BANK (FHLB):
 $ 10,000,000  FHLB, Discount Note........................    5.780%       8/1/95   $   10,000,000
    5,000,000  FHLB, Variable Rate........................    6.400       9/18/95        5,000,000
    5,000,000  FHLB, Variable Rate........................    6.280        2/3/97++      5,000,000
    7,500,000  FHLB, Variable Rate........................    5.980        5/8/97++      7,510,005
                                                                                    --------------
                                                                                        27,510,005
                                                                                    --------------
               FEDERAL HOME LOAN MORTGAGE CORPORATION (FHLMC):
    5,000,000  FHLMC, Discount Note.......................    5.630        9/7/95        4,971,068
    5,000,000  FHLMC, Discount Note.......................    5.600      10/27/95        4,932,333
                                                                                    --------------
                                                                                         9,903,401
                                                                                    --------------
               FEDERAL NATIONAL MORTGAGE ASSOCIATION
                (FNMA):
   10,000,000  FNMA, Discount Note........................    5.620      12/22/95        9,776,761
    5,000,000  FNMA, Medium Term Note.....................    6.460       3/27/96        5,020,184
    5,000,000  FNMA, Variable Rate, Medium Term Note......    6.400      12/20/95        5,000,000
    5,000,000  FNMA, Variable Rate, Medium Term Note......    6.350       10/7/96++      5,000,000
                                                                                    --------------
                                                                                        24,796,945
                                                                                    --------------
               TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS
                (COST $62,210,351)...............................................       62,210,351
                                                                                    --------------
               REPURCHASE AGREEMENTS -- 37.1%
               Agreement with J.P. Morgan Securities Inc. dated 7/31/95 bearing
                6.050% to be repurchased at $20,003,361 on 8/1/95, collateralized
                by $19,793,492 of various mortgage-backed securities, with
   20,000,000   various maturities and interest rates (market value --
                $20,400,001).....................................................       20,000,000
               Agreement with Lehman Brothers Government Securities Inc. dated
                7/31/95 bearing 6.000% to be repurchased at $16,671,778 on
                8/1/95, collateralized by $17,355,140 of various mortgage-backed
   16,669,000   securities, with various maturities and interest rates (market
                value -- $17,002,538)............................................       16,669,000
                                                                                    --------------
               TOTAL REPURCHASE AGREEMENTS (COST $36,669,000)....................       36,669,000
                                                                                    --------------
</TABLE>
 
<TABLE>
<S>                                                                    <C>        <C>
TOTAL INVESTMENTS (COST $98,879,351*)...............................   100.0%         98,879,351
OTHER ASSETS AND LIABILITIES (NET)..................................     0.0             (43,508)
                                                                       ------     --------------
NET ASSETS..........................................................   100.0%     $   98,835,843
                                                                       ------     --------------
                                                                       ------     --------------
<FN>
- ------------------------
  * Aggregate cost for Federal tax purposes.
  + For Discount Notes, the interest rate represents annualized yield at date
    of purchase.
 ++ Variable rate, resets daily.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       9
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JULY 31, 1995 (UNAUDITED)
 
                              CASH MANAGEMENT FUND
 
<TABLE>
<CAPTION>
     FACE                                                       INTEREST    MATURITY      VALUE
    VALUE                                                         RATE        DATE       (NOTE 1)
 ------------                                                   --------   ----------   ----------
 <C>           <S>                                              <C>        <C>          <C>
               U.S. GOVERNMENT AGENCY OBLIGATION -- 88.4%   (COST
               $1,000,000)
               FEDERAL HOME LOAN BANK (FHLB):
 $  1,000,000  FHLB, Variable Rate............................    6.280%       2/3/97+  $1,000,000
                                                                                        ----------
               REPURCHASE AGREEMENT -- 10.8% (COST $122,000)
               Agreement with Lehman Brothers Government Securities Inc. dated
                7/31/95 bearing 6.000% to be repurchased at $122,020 on 8/1/95,
                collateralized by $130,000 Government National Mortgage Association,
      122,000   6.990% due 1/15/25 (market value -- $126,649)........................
                                                                                           122,000
                                                                                        ----------
</TABLE>
 
<TABLE>
<S>                                                                       <C>        <C>
TOTAL INVESTMENTS (COST $1,122,000*)...................................    99.2%          1,122,000
OTHER ASSETS AND LIABILITIES (NET )....................................     0.8               9,435
                                                                          ------     --------------
NET ASSETS.............................................................   100.0%     $    1,131,435
                                                                          ------     --------------
                                                                          ------     --------------
<FN>
- ------------------------
* Aggregate cost for Federal tax purposes.
+ Variable rate, resets daily.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       10
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
July 31, 1995 (unaudited)
 
                   TREASURY INSTRUMENTS MONEY MARKET FUND II
 
<TABLE>
<CAPTION>
                                                      ANNUALIZED YIELD
    FACE                                                 AT DATE OF       MATURITY       VALUE
    VALUE                                                 PURCHASE          DATE        (NOTE 1)
 -----------                                          ----------------   ----------   ------------
 <C>          <S>                                     <C>                <C>          <C>
              U.S. TREASURY OBLIGATIONS -- 52.5%
 $15,000,000  U.S. Treasury Bills...................        5.680%          8/17/95   $ 14,962,134
  25,000,000  U.S. Treasury Bills...................        5.965            9/7/95     24,846,732
  25,000,000  U.S. Treasury Bills...................        5.500           9/14/95     24,831,944
  25,000,000  U.S. Treasury Bills...................        5.425           9/21/95     24,807,865
  10,000,000  U.S. Treasury Bills...................        5.845           9/21/95      9,917,196
  25,000,000  U.S. Treasury Bills...................        5.840           10/5/95     24,736,389
  20,000,000  U.S. Treasury Bills...................        5.750          10/12/95     19,770,000
  15,000,000  U.S. Treasury Bills...................        5.460          10/19/95     14,820,275
  10,000,000  U.S. Treasury Bills...................        5.685          10/19/95      9,875,246
  25,000,000  U.S. Treasury Bills...................        5.440          10/26/95     24,675,111
  10,000,000  U.S. Treasury Bills...................        5.740          10/26/95      9,862,877
  25,000,000  U.S. Treasury Bills...................        5.420          11/16/95     24,597,264
   5,000,000  U.S. Treasury Bills...................        5.980            3/7/96      4,818,109
  10,000,000  U.S. Treasury Bills...................        5.775            4/4/96      9,603,771
                                                                                      ------------
              TOTAL U.S. TREASURY OBLIGATIONS (COST $242,124,913)..................    242,124,913
                                                                                      ------------
              REPURCHASE AGREEMENTS -- 47.9%
              Agreement with BZW Securities Inc. dated 7/31/95 bearing 5.850% to be
               repurchased at $60,009,750 on 8/1/95, collateralized by $75,230,000
               of various mortgage-backed securities, with various maturities and
  60,000,000   interest rates (market value -- $61,200,703)........................
                                                                                        60,000,000
              Agreement with Chase Securities Inc. dated 7/31/95 bearing 5.850% to
               be repurchased at $60,009,750 on 8/1/95, collateralized by
               $81,804,000 of various U.S. Treasury Obligations, with various
  60,000,000   maturities and interest rates (market value -- $61,200,405).........
                                                                                        60,000,000
              Agreement with Lehman Brothers Government Securities Inc. dated
               7/31/95 bearing 5.860% to be repurchased at $45,007,325 on 8/1/95,
               collateralized by $239,288,000 of various U.S. Treasury Strips, with
  45,000,000   various maturities (market value -- $45,900,633)....................
                                                                                        45,000,000
              Agreement with Merrill Lynch Government Securities Inc. dated 7/31/95
               bearing 5.850% to be repurchased at $56,045,106 on 8/1/95,
               collateralized by $57,370,000 of various U.S. Treasury Bills, with
  56,036,000   various maturities (market value -- $57,158,014)....................
                                                                                        56,036,000
                                                                                      ------------
              TOTAL REPURCHASE AGREEMENTS (COST $221,036,000)......................    221,036,000
                                                                                      ------------
</TABLE>
 
<TABLE>
<S>                                                                       <C>        <C>
TOTAL INVESTMENTS (COST $463,160,913*).................................   100.4%       463,160,913
OTHER ASSETS AND LIABILITIES (NET).....................................    (0.4)        (1,634,097)
                                                                          -----      -------------
NET ASSETS.............................................................   100.0%     $ 461,526,816
                                                                          -----         ----------
                                                                          -----         ----------
<FN>
- ------------------------
* Aggregate cost for Federal tax purposes.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       11
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JULY 31, 1995 (UNAUDITED)
 
                  100% TREASURY INSTRUMENTS MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                                       ANNUALIZED YIELD
    FACE                                                  AT DATE OF       MATURITY       VALUE
   VALUE                                                   PURCHASE          DATE       (NOTE 1)
 ----------                                            ----------------   ----------   -----------
 <C>         <S>                                       <C>                <C>          <C>
             U.S. TREASURY OBLIGATIONS -- 100.9%
 $  645,000  U.S. Treasury Bills.....................        5.350%           8/3/95   $   644,804
    665,000  U.S. Treasury Bills.....................        5.650           8/10/95       664,061
    470,000  U.S. Treasury Bills.....................        5.690           8/10/95       469,332
    295,000  U.S. Treasury Bills.....................        5.390           8/17/95       294,293
    510,000  U.S. Treasury Bills.....................        5.395           8/17/95       508,777
    965,000  U.S. Treasury Bills.....................        5.640           8/31/95       960,464
    295,000  U.S. Treasury Bills.....................        5.300            9/7/95       293,393
    105,000  U.S. Treasury Bills.....................        5.340            9/7/95       104,424
    190,000  U.S. Treasury Bills.....................        5.390            9/7/95       188,948
    115,000  U.S. Treasury Bills.....................        5.450            9/7/95       114,356
  1,100,000  U.S. Treasury Bills.....................        5.380           9/14/95     1,092,766
    200,000  U.S. Treasury Bills.....................        5.420           9/14/95       198,675
  1,195,000  U.S. Treasury Bills.....................        5.340           9/21/95     1,185,960
  1,845,000  U.S. Treasury Bills.....................        5.540           9/21/95     1,830,520
     35,000  U.S. Treasury Bills.....................        5.350           10/5/95        34,662
  1,690,000  U.S. Treasury Bills.....................        5.390           10/5/95     1,673,553
    165,000  U.S. Treasury Bills.....................        5.400           10/5/95       163,391
    140,000  U.S. Treasury Bills.....................        5.340          10/12/95       138,505
  1,545,000  U.S. Treasury Bills.....................        5.665          10/12/95     1,527,495
    450,000  U.S. Treasury Bills.....................        5.350          10/19/95       444,717
    930,000  U.S. Treasury Bills.....................        5.360          10/19/95       919,061
    355,000  U.S. Treasury Bills.....................        5.400          10/19/95       350,793
  1,890,000  U.S. Treasury Bills.....................        5.410          10/19/95     1,867,562
     55,000  U.S. Treasury Bills.....................        5.420          10/19/95        54,346
    805,000  U.S. Treasury Bills.....................        5.400          10/26/95       794,616
                                                                                       -----------
</TABLE>
 
<TABLE>
<S>                                                                         <C>        <C>
TOTAL INVESTMENTS (COST $16,519,474*)....................................   100.9%       16,519,474
OTHER ASSETS AND LIABILITIES (NET).......................................    (0.9)         (141,641)
                                                                            ------     ------------
NET ASSETS...............................................................   100.0%     $ 16,377,833
                                                                            ------     ------------
                                                                            ------     ------------
<FN>
- ------------------------
* Aggregate cost for Federal tax purposes.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       12
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JULY 31, 1995 (UNAUDITED)
 
                           TAX-FREE MONEY MARKET FUND
 
<TABLE>
<CAPTION>
   FACE                                                                VALUE
  VALUE                                                              (NOTE 1)
- ----------                                                          -----------
<C>          <S>                                                    <C>
             MUNICIPAL BONDS AND NOTES -- 101.7%
             CALIFORNIA -- 5.1%
$4,000,000   California State, Revenue Anticipation Warrants,
              Series C,
              5.750% due 4/25/96.................................   $ 4,035,097
                                                                    -----------
             COLORADO -- 3.8%
 2,995,000   Colorado State, Housing Finance Authority,
              Multi-family Housing Revenue,
              (Sumitomo Bank, LOC),
              3.900% due 3/1/12+++...............................     2,995,000
                                                                    -----------
             DISTRICT OF COLUMBIA -- 5.8%
 2,070,000   District of Columbia, Housing Finance Agency,
              Multi-family Housing Revenue, (NationsBank
              Corporation of Virginia, LOC),
              4.125% due 7/1/97++................................     2,071,360
 2,500,000   District of Columbia, Revenue Notes, Abraham and
              Laura Lisner Home for Aged Women, (NationsBank
              Corporation of Georgia, LOC),
              3.900% due 7/1/22+++...............................     2,500,000
                                                                    -----------
                                                                      4,571,360
                                                                    -----------
             FLORIDA -- 4.8%
   100,000   Marion County, Florida, Industrial Development
              Authority Revenue, Charter Springs Hospital,
              (Bankers Trust Company, LOC),
              3.800% due 7/1/04+++...............................       100,000
             Orange County, Florida, Health Facilities Authority
              Revenue:
   600,000   Series C44,
              4.850% due 10/1/06+++..............................       600,000
 2,500,000   Series C46,
              4.950% due 10/1/08+++..............................     2,500,000
   580,000   Putnam County, Florida, Development Authority,
              Pollution Control Revenue, (Florida Power & Light
              Company Project),
              3.850% due 9/1/24+.................................       580,000
                                                                    -----------
                                                                      3,780,000
                                                                    -----------
             GEORGIA -- 3.2%
 1,000,000   Burke County, Georgia, Development Authority,
              Pollution Control Revenue, (Georgia Power Company
              Project), Series 2,
              4.100% due 4/1/25+.................................     1,000,000
 1,500,000   Georgia State, Municipal Electric Authority,
              Subordinate General Resolution Note, Series B,
              4.250% due 6/1/20++................................     1,501,813
                                                                    -----------
                                                                      2,501,813
                                                                    -----------
             ILLINOIS -- 8.9%
 1,000,000   Chicago, Illinois, Adjustable Rate Tender Notes,
              Series A, Commercial Paper
              Put 10/31/95, (Morgan Guaranty Trust Company, LOC),
              4.600% due 10/31/96++..............................     1,000,000
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       13
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                           TAX-FREE MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                                VALUE
  VALUE                                                              (NOTE 1)
- ----------                                                          -----------
<C>          <S>                                                    <C>
             MUNICIPAL BONDS AND NOTES (CONTINUED)
             ILLINOIS (CONTINUED)
$2,300,000   Chicago, Illinois, General Obligation, (Sanwa Bank,
              Ltd., LOC),
              3.850% due 1/1/10+++...............................   $ 2,300,000
   235,000   Cook County, Illinois, Municipal Securities,
              Treasury Receipts, Series SGA-3, (Sanwa Bank, Ltd.,
              LOC),
              4.000% due 11/15/23+++.............................       235,000
             Illinois Health Facilities Authority Revenue:
 1,500,000   (Carle Foundation Project),
              3.800% due 1/1/22+++...............................     1,500,000
 2,000,000   Series A,
              4.500% due 8/1/15++................................     2,000,000
                                                                    -----------
                                                                      7,035,000
                                                                    -----------
             KANSAS -- 4.7%
 3,700,000   La Cygne, Kansas, Environmental Improvement Revenue,
              (Kansas City Power & Light Company Project),
              3.950% due 3/1/15+++...............................     3,700,000
                                                                    -----------
             LOUISIANA -- 1.0%
   800,000   Louisiana State, Offshore Terminal Authority,
              Deepwater Port Revenue,
              (Loop Inc. Project), (Union Bank of Switzerland,
              LOC),
              3.800% due 9/1/06+.................................       800,000
                                                                    -----------
             MARYLAND -- 2.8%
   895,000   Maryland Environmental Services Revenue, (Mid-Shore
              Regional Landfill Project), (AMBAC Insured),
              5.200% due 9/1/95..................................       895,584
 1,300,000   Northeast Maryland, Waste Disposal Authority,
              Resource Recovery Revenue, (MBIA Insured),
              3.750% due 1/1/07++................................     1,300,000
                                                                    -----------
                                                                      2,195,584
                                                                    -----------
             MASSACHUSETTS -- 7.5%
 1,200,000   Massachusetts Municipal Wholesale Electric Company,
              Power Supply Systems Revenue, Series C, (Canadian
              Imperial Bank of Commerce, LOC),
              3.650% due 7/1/19+++...............................     1,200,000
 2,750,000   Massachusetts State, Municipal Securities Treasury
              Receipts, Series B, (Canadian Imperial Bank of
              Commerce, LOC),
              3.900% due 12/1/07+++..............................     2,750,000
 2,000,000   Massachusetts State Water Resources Authority,
              Municipal Securities Receipts, (Canadian Imperial
              Bank of Commerce, LOC),
              3.900% due 4/1/09+++...............................     2,000,000
                                                                    -----------
                                                                      5,950,000
                                                                    -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       14
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                           TAX-FREE MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                                VALUE
  VALUE                                                              (NOTE 1)
- ----------                                                          -----------
<C>          <S>                                                    <C>
             MUNICIPAL BONDS AND NOTES (CONTINUED)
             MICHIGAN -- 12.4%
$  200,000   Dearborn, Michigan, Economic Development Corporation
              Revenue, (Oakbrook Common Project), Limited
              Obligation, (Mellon Bank Corporation, LOC),
              3.800% due 3/1/25+++...............................   $   200,000
   600,000   Delta County, Michigan, Economic Development
              Corporation, Environmental Improvement Revenue,
              (Dates-Mead-Escanaba Paper Company Project),
              (Bank of Nova Scotia, LOC),
              4.200% due 12/1/13+................................       600,000
 2,000,000   Detroit, Michigan, City School District, State
              School Aid Notes,
              4.500% due 5/1/96..................................     2,009,460
 1,000,000   Michigan State, Pollution Control Revenue, (Dow
              Chemical Company Project),
              4.150% due 8/1/03++................................     1,000,000
 6,000,000   Michigan State, Storage Tank Financial Assurance
              Authority, Series I, (Canadian Imperial Bank of
              Commerce, LOC),
              3.900% due 12/1/04+++..............................     6,000,000
                                                                    -----------
                                                                      9,809,460
                                                                    -----------
             NEW JERSEY -- 2.5%
 2,000,000   Camden County, New Jersey, Bond Anticipation Notes,
              Series A,
              5.250% due 2/14/96.................................     2,004,624
                                                                    -----------
             NEW YORK -- 5.8%
 3,560,000   Monroe County, New York, Putters, Series 24-B,
              (Morgan Guaranty Trust Company, BPA),
              4.150% due 6/1/05+++...............................     3,560,000
 1,000,000   New York State, Dormitory Authority Revenue,
              Putters, Series 14-C,
              (Morgan Guaranty Trust Company, BPA),
              3.750% due 7/1/10+++...............................     1,000,000
                                                                    -----------
                                                                      4,560,000
                                                                    -----------
             NORTH CAROLINA -- 2.5%
 2,000,000   Greensboro, North Carolina, Public Improvement
              Revenue,
              General Obligation, Series B,
              3.750% due 4/1/14+++...............................     2,000,000
                                                                    -----------
             OHIO -- 5.9%
 3,800,000   Clermont County, Ohio, Hospital Facilities Revenue,
              Series B,
              (Mercy Health Systems, GTC),
              3.850% due 9/1/21+++...............................     3,800,000
   825,000   Cuyahoga County, Ohio, Industrial Development
              Revenue,
              (S&R Playhouse Realty Company Project),
              3.950% due 12/1/09++++.............................       825,000
                                                                    -----------
                                                                      4,625,000
                                                                    -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       15
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                           TAX-FREE MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                                VALUE
  VALUE                                                              (NOTE 1)
- ----------                                                          -----------
<C>          <S>                                                    <C>
             MUNICIPAL BONDS AND NOTES (CONTINUED)
             PENNSYLVANIA -- 8.9%
$2,000,000   Pennsylvania State Housing Finance Agency,
              Single-family Housing Revenue, Series N,
              4.350% due 4/1/08++................................   $ 2,000,000
 1,000,000   Philadelphia, Pennsylvania, School District Revenue,
              Tax and Revenue Anticipation Notes, General
              Obligation,
              4.500% due 6/28/96.................................     1,004,810
 4,000,000   Philadelphia, Pennsylvania, Tax and Revenue
              Anticipation Notes,
              General Obligation, Series A,
              4.500% due 6/27/96.................................     4,019,146
                                                                    -----------
                                                                      7,023,956
                                                                    -----------
             RHODE ISLAND -- 0.7%
   500,000   Cranston, Rhode Island, General Obligation, (MBIA
              Insured),
              5.400% due 6/15/96.................................       506,332
                                                                    -----------
             SOUTH CAROLINA -- 3.4%
   700,000   Rock Hill, South Carolina, Utility Systems Revenue,
              3.850% due 1/1/22+++...............................       700,000
 2,000,000   York County, South Carolina, Pollution Control
              Revenue, Saluda River,
              (Cooperative Finance Corporation Insured),
              4.550% due 8/15/14++...............................     2,000,000
                                                                    -----------
                                                                      2,700,000
                                                                    -----------
             TENNESSEE -- 0.9%
   700,000   Chattanooga, Tennessee, Industrial Development Board
              Revenue, (Warehouse Row Ltd. Project), (Credit
              Suisse, LOC),
              3.800% due 12/15/12+++.............................       700,000
                                                                    -----------
             TEXAS -- 6.7%
   700,000   Grapevine, Texas, Industrial Development
              Corporation, Airport Revenue, Southern Air
              Transportation, (Bank of Montreal, LOC),
              3.850% due 3/1/10+++...............................       700,000
 1,300,000   San Antonio, Texas, Customs Receipts Notes,
              3.950% due 8/1/02+++...............................     1,300,000
 3,300,000   Texas State, Tax and Revenue Anticipation Notes,
              5.000% due 8/31/95.................................     3,302,598
                                                                    -----------
                                                                      5,302,598
                                                                    -----------
             VIRGINIA -- 1.9%
 1,000,000   Virginia State, Public Building Authority, Series A,
              (Correctional Facilities Project),
              6.650% due 2/1/96..................................     1,011,622
   500,000   Virginia State, Public School Authority, (MBIA
              Insured),
              6.300% due 8/1/95..................................       500,000
                                                                    -----------
                                                                      1,511,622
                                                                    -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       16
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                           TAX-FREE MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                                VALUE
  VALUE                                                              (NOTE 1)
- ----------                                                          -----------
<C>          <S>                                                    <C>
             MUNICIPAL BONDS AND NOTES (CONTINUED)
             WISCONSIN -- 2.5%
$2,000,000   Wisconsin State, Public Power Systems Revenue,
              Municipal Securities, Treasury Receipts, Series
              SGA-10,
              4.100% due 7/1/14+++...............................   $ 2,000,000
                                                                    -----------
</TABLE>
 
<TABLE>
<S>                                                        <C>       <C>
TOTAL INVESTMENTS (COST $80,307,446*)...................   101.7%     80,307,446
OTHER ASSETS AND LIABILITIES (NET)......................    (1.7)     (1,326,729)
                                                           ------    -----------
NET ASSETS..............................................   100.0%    $78,980,717
                                                           ------    -----------
                                                           ------    -----------
<FN>
- ------------------------
   * Aggregate cost for Federal tax purposes.
   + Variable rate demand notes are payable upon not more than one business
     day's notice. The interest rate shown reflects the rate currently in
     effect.
  ++ Put bonds and notes have demand features which mature within one year. The
     interest rate shown reflects the rate currently in effect.
 +++ Variable rate demand notes are payable upon not more than seven business
     days' notice. The interest rate shown reflects the rate currently in
     effect.
++++ Variable rate demand notes are payable upon not more than thirty business
     days' notice. The interest rate shown reflects the rate currently in
     effect.
 
AMBAC -- American Municipal Bond Assurance Corporation.
BPA   -- Instruments supported by bond purchase agreement.
GTC  -- Instruments guaranteed by corporation.
LOC  -- Instruments supported by bank letter of credit.
MBIA -- Municipal Bond Investors Assurance.
</TABLE>
 
NOTE:
Approximately 50.3% of the municipal bonds and notes held by the Fund have
credit enhancement features backing them. Such features may have been considered
by the rating agency in rating these securities.
 
                SUMMARY OF MUNICIPAL BONDS BY COMBINED RATINGS#
 
<TABLE>
<CAPTION>
                                                                               PERCENT
                   MOODY'S                   STANDARD & POOR'S                 OF VALUE
              <S>                            <C>                               <C>
              Aaa                                   AAA                            23.7%
              Aa, Aa2, Aa3                           AA                            23.7
              MIG1/VMIG1/P1                  A-1/A-1+/SP-1/SP-1+                   52.6
                                                                               --------
                                                                                  100.0%
                                                                               --------
                                                                               --------
              # Bonds are not necessarily rated the same by both services.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       17
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
July 31, 1995 (unaudited)
 
                          MUNICIPAL MONEY MARKET FUND
 
<TABLE>
<CAPTION>
   FACE                                                                            VALUE
  VALUE                                                                          (NOTE 1)
- ----------                                                                      -----------
<C>         <S>                                                                 <C>
            MUNICIPAL BONDS AND NOTES -- 99.7%
            ARIZONA -- 4.6%
$2,000,000  Cochise County, Arizona, Pollution Control Corporation, Solid
             Waste Disposal Revenue, (Arizona Electric Power Inc. Project),
             4.450% due 9/1/24++..............................................  $ 2,000,282
 2,000,000  Flagstaff, Arizona, Industrial Development Authority, Multi-family
             Housing Revenue, (Woodcrest Apartments Project), (First
             Interstate Bank, LOC),
             4.000% due 2/1/24+++.............................................    2,000,000
 2,500,000  Maricopa County, Arizona, Pollution Control Corporation,
             Pollution Control Revenue, (Arizona Public Service Company
             Project),
             Series D, (Bank of America, LOC),
             3.750% due 5/1/24+...............................................    2,500,000
 2,710,000  Phoenix, Arizona, Industrial Development Authority, Multi-family
             Housing Revenue, (Ventana Palms Apartments Project), (First
             Interstate Bank, LOC),
             4.000% due 2/1/24+++.............................................    2,710,000
 1,500,000  Special Fund of Industrial Commission, Arizona,
             Commercial Paper Put 8/23/95, (FGIC Insured),
             (Sumitomo Bank, BPA),
             4.200% due 9/1/05++..............................................    1,500,000
                                                                                -----------
                                                                                 10,710,282
                                                                                -----------
            CALIFORNIA -- 4.1%
 9,300,000  California State, Revenue Anticipation Warrants, Series C,
             5.750% due 4/25/96...............................................    9,384,559
                                                                                -----------
            COLORADO -- 3.0%
 3,000,000  Arapahoe County, Colorado, Capital Improvement Highway Revenue,
             (E-470 Project), Series F, (Union Bank of Switzerland, LOC),
             4.450% due 8/31/26++.............................................    3,000,000
 4,000,000  Colorado State, Housing Finance Authority, Multi-family Housing
             Revenue,
             (Sumitomo Bank, LOC),
             3.900% due 3/1/12+++.............................................    4,000,000
                                                                                -----------
                                                                                  7,000,000
                                                                                -----------
            FLORIDA -- 4.8%
 1,810,000  Dade County, Florida, Industrial Development Authority Revenue,
             (Barnett Bank, LOC),
             4.100% due 11/1/09+++............................................    1,810,000
   800,000  Dade County, Florida, Solid Waste Industrial Development Authority
             Revenue, (Montenay-Dade Ltd. Project), Series A, (Banque Paribas,
             LOC),
             4.050% due 12/1/10+++............................................      800,000
 2,400,000  Putnam County, Florida, Development Authority, Pollution Control
             Revenue, (Florida Power & Light Company Project),
             3.850% due 9/1/24+...............................................    2,400,000
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       18
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                          MUNICIPAL MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                                            VALUE
  VALUE                                                                          (NOTE 1)
- ----------                                                                      -----------
<C>         <S>                                                                 <C>
            MUNICIPAL BONDS AND NOTES (CONTINUED)
            FLORIDA (CONTINUED)
$2,500,000  St. John's County, Florida, Industrial Development Authority
             Revenue,
             (Kredietbank, LOC),
             4.000% due 12/1/16+++............................................  $ 2,500,000
 3,500,000  St. Lucie County, Florida, Pollution Control Revenue,
             (Florida Power & Light Company Project),
             3.850% due 7/1/26+...............................................    3,500,000
                                                                                -----------
                                                                                 11,010,000
                                                                                -----------
            GEORGIA -- 3.2%
 3,400,000  Fulton County, Georgia, Development Authority, Industrial Revenue,
             (Leggett & Platt Inc. Project), Series A, (Wachovia Bank, LOC),
             4.300% due 6/1/27+++.............................................    3,400,000
 4,000,000  Georgia State Residential Finance Authority, Home Ownership
             Mortgage Revenue, Series C,
             4.050% due 12/1/18++.............................................    4,000,960
                                                                                -----------
                                                                                  7,400,960
                                                                                -----------
            HAWAII -- 6.5%
15,000,000  Secondary Market Services Corporation, Hawaii Student Loan
             Revenue, Series I,
             4.250% due 9/1/10++..............................................   15,000,000
                                                                                -----------
            ILLINOIS -- 5.9%
 1,000,000  Chicago, Illinois, Adjustable Rate Tender Notes, Commercial Paper
             Put 10/31/95, Series A, (Morgan Guaranty Trust Company, LOC),
             4.600% due 10/31/96..............................................    1,000,000
 1,200,000  Chicago, Illinois, O'Hare International Airport, Series B,
             (Sanwa Bank, Ltd., LOC),
             3.900% due 1/1/18+++.............................................    1,200,000
            Illinois Development Finance Authority Revenue:
 3,500,000  (Greyhill Inc. Project), Series B,
             4.000% due 11/1/23+++............................................    3,500,000
 1,000,000  (Nutrasweet Company Project), (Monsanto Company Credit),
             4.000% due 2/1/05+++.............................................    1,000,000
 3,000,000  Illinois Health Facilities Authority Revenue,
             Commercial Paper Put 8/17/95, Series A,
             4.500% due 8/1/15++..............................................    3,000,000
 3,000,000  Southwestern Illinios Development Authority, Industrial
             Development Revenue, (Robinson Steel Company Inc. Project),
             (American National Bank & Trust Company, LOC),
             4.050% due 12/1/06+++............................................    3,000,000
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       19
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                          MUNICIPAL MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                                            VALUE
  VALUE                                                                          (NOTE 1)
- ----------                                                                      -----------
<C>         <S>                                                                 <C>
            MUNICIPAL BONDS AND NOTES (CONTINUED)
            ILLINOIS (CONTINUED)
$1,000,000  West Chicago, Illinois, Industrial Development Revenue,
             (Acme Printing Inc. Project), (Bank of Tokyo Ltd., LOC),
             4.125% due 5/1/99+++.............................................  $ 1,000,000
                                                                                -----------
                                                                                 13,700,000
                                                                                -----------
            INDIANA -- 4.5%
            Indiana State, Employment Development Revenue:
   500,000  (Double Eagle Industries Inc. Project),
             4.150% due 1/1/13+++.............................................      500,000
   150,000  (Mobel Project),
             4.150% due 1/1/14+++.............................................      150,000
 1,400,000  (Shadeland Ventures Project),
             4.150% due 1/1/14+++.............................................    1,400,000
   800,000  Indiana State, Secondary Student Loan Marketing Revenue, Series B,
             (AMBAC Insured), (Mitsubishi Bank, BPA),
             3.900% due 12/1/13+++............................................      800,000
   500,000  Ossian, Indiana, Industrial Economic Development Revenue,
             (Harris Trust and Savings Bank, LOC),
             4.000% due 12/1/23+++............................................      500,000
 7,000,000  Tippecanoe County, Indiana, Economic Development Revenue,
             (Consolidated Industries Corporation Project), (Bank of New York,
             LOC),
             4.000% due 4/1/00+++.............................................    7,000,000
                                                                                -----------
                                                                                 10,350,000
                                                                                -----------
            IOWA -- 2.0%
            Iowa Finance Authority, Solid Waste Disposal Revenue,
             (Cedar River Paper Company Project), Series A, (Swiss Bank, LOC):
 2,700,000  3.900% due 7/1/23+................................................    2,700,000
 1,900,000  3.900% due 6/1/24+................................................    1,900,000
                                                                                -----------
                                                                                  4,600,000
                                                                                -----------
            KENTUCKY -- 3.0%
 3,000,000  Kentucky Housing Corporation, Housing Revenue, Series E,
             3.700% due 7/1/26++..............................................    3,000,000
   500,000  Kentucky State, Pollution Abatement and Water Resources Finance
             Authority Revenue, Pollution Control, (Bank of Tokyo
             Ltd./Sakura/Sanwa/Tokai, BPA),
             4.300% due 8/13/06+..............................................      500,000
 3,400,000  Pulaski County, Kentucky, Solid Waste Disposal Revenue,
             (National Rural Utilities -- East Kentucky Power Project), Series
             B,
             4.650% due 8/15/23++.............................................    3,400,311
                                                                                -----------
                                                                                  6,900,311
                                                                                -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       20
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                          MUNICIPAL MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                                            VALUE
  VALUE                                                                          (NOTE 1)
- ----------                                                                      -----------
<C>         <S>                                                                 <C>
            MUNICIPAL BONDS AND NOTES (CONTINUED)
            MASSACHUSETTS -- 3.5%
$5,000,000  Massachusetts Bay Transportation Authority, Series A,
             5.500% due 3/1/96................................................  $ 5,024,293
            Massachusetts State, Housing Finance Agency, Housing Revenue:
 1,000,000  Rental, Series A, (AMBAC Insured),
             4.550% due 1/1/96................................................    1,000,371
 2,000,000  Single-family,
             4.150% due 12/1/22++.............................................    2,000,000
                                                                                -----------
                                                                                  8,024,664
                                                                                -----------
            MICHIGAN -- 4.3%
 3,000,000  Detroit, Michigan, City School District, State School Aid Notes,
             4.500% due 5/1/96................................................    3,014,190
 2,900,000  Michigan Higher Education Student Loan, Series XII-F, (AMBAC
             Insured), (Sumitomo Bank, BPA),
             3.900% due 10/1/20+++............................................    2,900,000
            Michigan State Strategic Fund:
 1,100,000  (Lex Controls Inc. Project), (Bank of Tokyo Ltd., LOC),
             4.000% due 7/1/99+++.............................................    1,100,000
 2,000,000  Pollution Control Revenue, (Dow Chemical Company Project),
             (NCNB National Bank, Corporate Credit),
             4.200% due 12/1/02...............................................    2,000,000
 1,000,000  Solid Waste Disposal Revenue, (S.D. Warren Company Project),
             Series A, Commercial Paper Put 8/17/95, (Sumitomo Bank, LOC),
             4.200% due 1/15/22++.............................................    1,000,000
                                                                                -----------
                                                                                 10,014,190
                                                                                -----------
            MISSISSIPPI -- 2.2%
 5,000,000  Mississippi Business Financial Corporation, Solid Waste Disposal
             Revenue, (Morton International Inc. Project), Series B,
             4.000% due 6/1/20+++.............................................    5,000,000
                                                                                -----------
            MISSOURI -- 2.2%
   500,000  Kansas City, Missouri, Industrial Development Authority,
             Hospital Revenue, Research Health Services System,
             (MBIA Insured), (Sumitomo Bank Ltd., Corporate Credit),
             3.900% due 10/15/15+.............................................      500,000
 4,500,000  Missouri Higher Education Loan Authority, Series A,
             (National Westminster Bank, LOC),
             3.900% due 6/1/17+++.............................................    4,500,000
                                                                                -----------
                                                                                  5,000,000
                                                                                -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       21
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                          MUNICIPAL MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                                            VALUE
  VALUE                                                                          (NOTE 1)
- ----------                                                                      -----------
<C>         <S>                                                                 <C>
            MUNICIPAL BONDS AND NOTES (CONTINUED)
            MONTANA -- 1.8%
$4,150,000  Montana State Board Investment Resource Recovery Revenue,
             (Colstrip Project), (Fuji Bank Ltd., LOC),
             4.050% due 12/30/15+++...........................................  $ 4,150,000
                                                                                -----------
            NEVADA -- 2.1%
            Nevada State Department, Commercial Industrial Development
             Revenue:
   500,000  (Halco Project), Series A, (Kyowa Bank Ltd., LOC),
             4.100% due 12/1/09+++............................................      500,000
   100,000  (Kinplex Project), Series A, (Credit Commerciale de France, LOC),
             4.100% due 1/1/09+++.............................................      100,000
 4,200,000  (Marshmallow Lane Partners Project), (Credit Commerciale de
             France, LOC),
             4.000% due 4/1/09+++.............................................    4,200,000
                                                                                -----------
                                                                                  4,800,000
                                                                                -----------
            NEW HAMPSHIRE -- 1.3%
 3,000,000  New Hampshire State Housing Finance Authority,
             Single-family Revenue, Series F,
             4.300% due 7/1/26++..............................................    3,000,000
                                                                                -----------
            NEW JERSEY -- 2.3%
 3,000,000  Camden County, New Jersey, Bond Anticipation Notes, Series A,
             5.250% due 2/14/96...............................................    3,006,937
            New Jersey Economic Development Authority Revenue, (Wearbest
             Sil-Tex
             Mills Project):
 1,610,000  Series A,
             4.250% due 7/1/15+++.............................................    1,610,000
   800,000  Series B,
             4.250% due 7/1/01+++.............................................      800,000
                                                                                -----------
                                                                                  5,416,937
                                                                                -----------
            NEW MEXICO -- 1.9%
 4,334,000  Rio Arriba County, New Mexico, Industrial Revenue,
             (Franklin Industries Project), (NationsBank Corporation, LOC),
             4.000% due 12/1/07+++............................................    4,334,000
                                                                                -----------
            NEW YORK -- 2.3%
 2,200,000  Monroe County, New York, Putters, Series 24-A,
             4.150% due 6/1/04+++.............................................    2,200,000
 3,000,000  New York State, Dormitory Authority Revenue,
             3.750% due 7/1/08+++.............................................    3,000,000
                                                                                -----------
                                                                                  5,200,000
                                                                                -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       22
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                          MUNICIPAL MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                                            VALUE
  VALUE                                                                          (NOTE 1)
- ----------                                                                      -----------
<C>         <S>                                                                 <C>
            MUNICIPAL BONDS AND NOTES (CONTINUED)
            OHIO -- 1.3%
$3,000,000  Ohio State, Water Development Authority, Pollution Control
             Facilities Revenue, (Ohio Edison Company Project), Series A,
             (Union Bank of Switzerland, LOC),
             4.750% due 5/1/18++..............................................  $ 3,005,957
                                                                                -----------
            OREGON -- 3.3%
 3,650,000  Metropolitan Service, Oregon, Waste Disposal Revenue, (Riedel
             Oregon
             Compost Company Project), Series A, (U.S. National Bank, LOC),
             4.100% due 7/1/11+++.............................................    3,650,000
            Oregon State Economic Development Commission Revenue:
 2,000,000  (Kydtaru Project), (Bank of Tokyo Ltd., LOC),
             4.125% due 12/1/99+++............................................    2,000,000
   850,000  Series C, (First Interstate Bank of Oregon, LOC),
             4.500% due 7/1/98+++.............................................      850,000
 1,155,000  (Toshi Project), Series B, (First Interstate Bank of Oregon, LOC),
             4.500% due 7/1/02+++.............................................    1,155,000
                                                                                -----------
                                                                                  7,655,000
                                                                                -----------
            PENNSYLVANIA -- 4.3%
 2,000,000  Pennsylvania State Housing Finance Agency, Single-family Housing
             Revenue, Series N,
             4.350% due 4/1/08++..............................................    2,000,000
            Pennsylvania State Higher Education Assistance Agency,
             Student Loan Revenue, (Sallie Mae, LOC):
   800,000  Series A,
             3.900% due 1/1/18+++.............................................      800,000
 1,200,000  Series B,
             3.900% due 7/1/18+++.............................................    1,200,000
 6,000,000  Philadelphia, Pennsylvania, Tax and Revenue Anticipation Notes,
             General Obligation, Series A,
             4.500% due 6/27/96...............................................    6,028,439
                                                                                -----------
                                                                                 10,028,439
                                                                                -----------
            SOUTH CAROLINA -- 2.6%
 1,750,000  Piedmont Municipal Power Agency, Electric Revenue, Pre-refunded
             1/1/96,
             9.700% due 1/1/24................................................    1,843,800
            South Carolina Jobs and Economic Development Authority, Economic
             Development Revenue:
            (Bank of Tokyo Ltd., LOC):
 1,900,000  4.500% due 12/1/06+++.............................................    1,900,000
   750,000  4.500% due 12/1/07+++.............................................      750,000
 1,320,000  (Osmose Wood Preserving Project), Series B,
             3.900% due 12/1/04+++............................................    1,320,000
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       23
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                          MUNICIPAL MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                                            VALUE
  VALUE                                                                          (NOTE 1)
- ----------                                                                      -----------
<C>         <S>                                                                 <C>
            MUNICIPAL BONDS AND NOTES (CONTINUED)
            SOUTH CAROLINA (CONTINUED)
            South Carolina Jobs and Economic Development Authority, Economic
             Development Revenue (continued):
$  150,000  (Regal-Beloit Corporation Project), Series A,
             3.900% due 5/1/01+++.............................................  $   150,000
                                                                                -----------
                                                                                  5,963,800
                                                                                -----------
            TENNESSEE -- 8.9%
 2,700,000  Coffee County, Tennessee, Industrial Development Board Revenue,
             (Asahi Bank Ltd., LOC),
             5.000% due 12/1/01+++............................................    2,700,000
 2,200,000  Collierville, Tennessee, Industrial Development Board, Industrial
             Revenue, (Ardco Inc. Project), (Harris Trust and Savings Bank,
             LOC),
             4.000% due 4/1/09+++.............................................    2,200,000
 1,500,000  Hamilton County, Tennessee, Industrial Development Board,
             Industrial Revenue, (Komatsv Project), (Bank of New York, LOC),
             4.000% due 12/1/17+++............................................    1,500,000
 6,600,000  McKenzie, Tennessee, Industrial Development Board, Industrial
             Revenue, (Canadian Imperial Bank of Commerce, LOC),
             4.000% due 2/1/01+++.............................................    6,600,000
 3,000,000  Morristown, Tennessee, Industrial Development Board, Industrial
             Development Revenue, (Fleet National Bank, LOC),
             4.050% due 4/1/10+++.............................................    3,000,000
 1,500,000  Rutherford County, Tennessee, Industrial Development Board,
             Industrial Development Revenue, (Leggett & Platt Inc. Project),
             Series A,
             (Wachovia Bank, LOC),
             4.300% due 12/1/03+++............................................    1,500,000
 1,000,000  Shelby County, Tennessee, Health Education and Housing Facilities
             Board Revenue, Multi-family Housing, (Arbor Lake Project),
             (Citibank, LOC),
             4.050% due 3/1/10+++.............................................    1,000,000
 1,950,000  Tennessee Housing Development Agency, Series F,
             3.850% due 7/1/16++..............................................    1,950,000
                                                                                -----------
                                                                                 20,450,000
                                                                                -----------
            TEXAS -- 11.7%
 2,655,000  Dallas, Texas, Housing Finance Corporation, Mortgage Revenue,
             Series A,
             3.850% due 1/1/15++..............................................    2,655,000
 1,000,000  Harris County, Texas, Health Facilities Development Corporation,
             Hospital Revenue, (St. Luke's Episcopal Hospital), Series D,
             4.200% due 2/15/16+..............................................    1,000,000
 2,000,000  North Texas Higher Education Authority, Student Loan Revenue,
             (AMBAC Insured), (Sallie Mae, BPA),
             3.900% due 4/1/20+++.............................................    2,000,000
 1,900,000  San Antonio, Texas, Housing Finance Corporation, (Eagles Nest
             Apartments Project), (Swiss Bank, LOC),
             3.900% due 5/1/20+++.............................................    1,900,000
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       24
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                          MUNICIPAL MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                                            VALUE
  VALUE                                                                          (NOTE 1)
- ----------                                                                      -----------
<C>         <S>                                                                 <C>
            MUNICIPAL BONDS AND NOTES (CONTINUED)
            TEXAS (CONTINUED)
$3,740,000  Tarrant County, Texas, Housing Finance Corporation, Housing
             Revenue,
             3.850% due 7/1/12++..............................................  $ 3,740,000
15,645,000  Texas State, Tax and Revenue Anticipation Notes,
             5.000% due 8/31/95...............................................   15,656,623
                                                                                -----------
                                                                                 26,951,623
                                                                                -----------
            VERMONT -- 0.9%
 2,000,000  Vermont Industrial Development Authority, Pollution Control
             Revenue, (Bolton Valley Project), (Bank of New York, LOC),
             4.150% due 12/1/11+++............................................    2,000,000
                                                                                -----------
            WASHINGTON -- 0.8%
 1,800,000  Student Loan Finance Association, Washington, Series A,
             (National Westminster Bank, LOC),
             3.850% due 1/1/04+++.............................................    1,800,000
                                                                                -----------
            WEST VIRGINIA -- 0.4%
 1,000,000  Marion County, West Virginia, Solid Waste Disposal Facilities
             Revenue, (Granttown Project), Series D, (National Westminster
             Bank, LOC),
             3.950% due 10/1/17+++............................................    1,000,000
                                                                                -----------
 
TOTAL INVESTMENTS (COST $229,850,722*)...........................     99.7%     229,850,722
OTHER ASSETS AND LIABILITIES (NET)...............................      0.3          688,934
                                                                    ------    -------------
NET ASSETS.......................................................    100.0%   $ 230,539,656
                                                                    ------    -------------
                                                                    ------    -------------
<FN>
- ------------------------
  * Aggregate cost for Federal tax purposes.
  + Variable rate demand notes are payable upon not more than one business day's
    notice. The interest rate shown reflects the rate currently in effect.
 ++ Put bonds and notes have demand features which mature within one year. The
    interest rate shown reflects the rate currently in effect.
+++ Variable rate demand notes are payable upon not more than seven business
    days' notice. The interest rate shown reflects the rate currently in effect.
 
AMBAC -- American Municipal Bond Assurance Corporation.
BPA   -- Instruments supported by bond purchase agreement.
FGIC  -- Federal Guaranty Insurance Corporation.
LOC  -- Instruments supported by bank letter of credit.
MBIA -- Municipal Bond Investors Assurance.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       25
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
                          MUNICIPAL MONEY MARKET FUND
 
NOTE:
Approximately 49.0% of the municipal bonds and notes held by the Fund have
credit enhancement features backing them. Such features may have been considered
by the rating agency in rating these securities.
 
                SUMMARY OF MUNICIPAL BONDS BY COMBINED RATINGS#
 
<TABLE>
<CAPTION>
                                                                  PERCENT
               MOODY'S                STANDARD & POOR'S           OF VALUE
          <S>                        <C>                          <C>
          Aaa                                AAA                       3.2%
          Aa, Aa2, Aa3                       AA                        2.6
          MIG1/VMIG1/P-1             A-1/A-1+/SP-1/SP-1+              76.3
          MIG2/VMIG2/P-2                     SP2                       3.6
          NR                                 NR                       14.3
                                                                  --------
                                                                     100.0%
                                                                  --------
                                                                  --------
          # Bonds are not necessarily rated the same by both services.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       26
<PAGE>
                 (This page has been left blank intentionally.)
 
                                       27
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF ASSETS AND LIABILITIES
JULY 31, 1995 (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                                              GOVERNMENT
                                                              PRIME          PRIME VALUE      OBLIGATIONS        CASH
                                                          MONEY MARKET      MONEY MARKET     MONEY MARKET     MANAGEMENT
                                                              FUND              FUND             FUND            FUND
                                                         ---------------   ---------------   -------------   ------------
<S>                                                      <C>               <C>               <C>             <C>
ASSETS:
Investments, at value
  See accompanying schedules:
    Securities.........................................  $2,742,983,303    $2,546,447,973    $ 62,210,351     $1,000,000
    Repurchase agreements..............................   1,898,016,000       889,607,000      36,669,000        122,000
                                                         ---------------   ---------------   -------------   ------------
Total investments......................................   4,640,999,303     3,436,054,973      98,879,351      1,122,000
Cash...................................................         552,186               312             965            642
Receivable from Investment Adviser (Note 2)............        --                --               --               3,501
Interest receivable....................................      16,610,734        11,443,532         415,977         21,213
Receivable for investment securities sold..............        --              50,115,780         --             --
Unamortized organization costs (Note 5)................          30,543            30,543          30,593         30,593
Other assets...........................................             447          --               --             --
                                                         ---------------   ---------------   -------------   ------------
  Total Assets.........................................   4,658,193,213     3,497,645,140      99,326,886      1,177,949
                                                         ---------------   ---------------   -------------   ------------
LIABILITIES:
Investment Advisory fee payable (Note 2)...............         346,063           319,720           6,998        --
Administration fee payable (Note 2)....................         105,680            83,873           2,193             26
Due to custodian.......................................        --                --               --             --
Service fees payable (Note 3)..........................          76,808             5,846           2,080        --
Transfer Agent fee payable.............................         101,400            70,350           1,250             20
Custodian fees payable (Note 2)........................          79,125            58,835          12,015         16,615
Dividends payable......................................      14,114,743        11,921,100         441,084          5,185
Payable for investment securities purchased............        --                --               --             --
Accrued expenses and other payables....................         548,759           385,442          25,423         24,668
                                                         ---------------   ---------------   -------------   ------------
  Total Liabilities....................................      15,372,578        12,845,166         491,043         46,514
                                                         ---------------   ---------------   -------------   ------------
NET ASSETS.............................................  $4,642,820,635    $3,484,799,974    $ 98,835,843     $1,131,435
                                                         ---------------   ---------------   -------------   ------------
                                                         ---------------   ---------------   -------------   ------------
Investments, at cost (Note 1)..........................  $4,640,999,303    $3,436,054,973    $ 98,879,351     $1,122,000
                                                         ---------------   ---------------   -------------   ------------
                                                         ---------------   ---------------   -------------   ------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       28
<PAGE>
 
<TABLE>
<CAPTION>
                                                              100%
                                            TREASURY        TREASURY
                                           INSTRUMENTS    INSTRUMENTS      TAX-FREE       MUNICIPAL
                                          MONEY MARKET    MONEY MARKET   MONEY MARKET   MONEY MARKET
                                             FUND II          FUND           FUND           FUND
                                          -------------   ------------   ------------   -------------
<S>                                       <C>             <C>            <C>            <C>
ASSETS:
Investments, at value
  See accompanying schedules:
    Securities..........................  $242,124,913    $16,519,474    $80,307,446    $229,850,722
    Repurchase agreements...............   221,036,000        --             --              --
                                          -------------   ------------   ------------   -------------
Total investments.......................   463,160,913     16,519,474     80,307,446     229,850,722
Cash....................................           122        --             243,720         104,433
Receivable from Investment Adviser (Note
  2)....................................       --               2,925        --              --
Interest receivable.....................        37,519        --             662,150       1,939,558
Receivable for investment securities
  sold..................................       --             --             --            2,000,000
Unamortized organization costs (Note
  5)....................................        30,543         30,543         30.593          30,593
Other assets............................       --             --             --              --
                                          -------------   ------------   ------------   -------------
  Total Assets..........................   463,229,097     16,552,942     81,243,909     233,925,306
                                          -------------   ------------   ------------   -------------
LIABILITIES:
Investment Advisory fee payable (Note
  2)....................................        46,606        --               3,946          18,075
Administration fee payable (Note 2).....        10,765        --               1,362           3,521
Due to custodian........................       --              71,236        --              --
Service fees payable (Note 3)...........         8,283        --             --                  803
Transfer Agent fee payable..............         6,230            235            920           2,300
Custodian fees payable (Note 2).........        22,366         12,700         21,723          17,150
Dividends payable.......................     1,558,638         68,208        200,668         299,484
Payable for investment securities
  purchased.............................       --             --           2,009,460       3,014,190
Accrued expenses and other payables.....        49,393         22,730         25,113          30,127
                                          -------------   ------------   ------------   -------------
  Total Liabilities.....................     1,702,281        175,109      2,263,192       3,385,650
                                          -------------   ------------   ------------   -------------
NET ASSETS..............................  $461,526,816    $16,377,833    $78,980,717    $230,539,656
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
Investments, at cost (Note 1)...........  $463,160,913    $16,519,474    $80,307,446    $229,850,722
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       29
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF ASSETS AND LIABILITIES (CONTINUED)
JULY 31, 1995 (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                                              GOVERNMENT
                                                              PRIME          PRIME VALUE     OBLIGATIONS        CASH
                                                          MONEY MARKET      MONEY MARKET     MONEY MARKET    MANAGEMENT
                                                              FUND              FUND             FUND           FUND
                                                         ---------------   ---------------   ------------   ------------
<S>                                                      <C>               <C>               <C>            <C>
NET ASSETS consist of:
Undistributed net investment income....................  $       19,757    $        1,576    $     1,817     $  --
Accumulated net realized gain/(loss) on investments
  sold.................................................        (179,364)         (159,654)        (4,414)            10
Par value..............................................       4,642,980         3,484,958         98,838          1,131
Paid-in capital in excess of par value.................   4,638,337,262     3,481,473,094     98,739,602      1,130,294
                                                         ---------------   ---------------   ------------   ------------
                                                         $4,642,820,635    $3,484,799,974    $98,835,843     $1,131,435
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
NET ASSETS:
  Class A..............................................  $4,308,464,612    $3,460,283,837    $84,938,702     $1,131,125
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
  Class B..............................................  $  316,304,021    $   24,515,937    $13,288,221     $      100*
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
  Class C..............................................  $   13,480,198    $          100    $   608,820     $      110*
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
  Class E..............................................  $    4,571,804    $          100    $       100     $      100*
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
SHARES OUTSTANDING:
  Class A..............................................   4,308,609,993     3,460,439,390     84,939,980      1,131,115
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
  Class B..............................................     316,317,187        24,518,462     13,289,540            100
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
  Class C..............................................      13,480,771               100        608,820            110
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
  Class E..............................................       4,572,291               100            100            100
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
CLASS A SHARES:
Net asset value, offering and redemption price per
  share................................................           $1.00             $1.00          $1.00          $1.00
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
CLASS B SHARES:
Net asset value, offering and redemption price per
  share................................................           $1.00             $1.00          $1.00          $1.00
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
CLASS C SHARES:
Net asset value, offering and redemption price per
  share................................................           $1.00             $1.00          $1.00          $1.00
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
CLASS E SHARES:
Net asset value, offering and redemption price per
  share................................................           $1.00             $1.00          $1.00          $1.00
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
</TABLE>
 
- ------------------------------
* Lehman Brothers Inc. is the sole remaining shareholder in these classes.
 
                       See Notes to Financial Statements.
 
                                       30
<PAGE>
 
<TABLE>
<CAPTION>
                                                              100%
                                            TREASURY        TREASURY
                                           INSTRUMENTS    INSTRUMENTS      TAX-FREE       MUNICIPAL
                                          MONEY MARKET    MONEY MARKET   MONEY MARKET   MONEY MARKET
                                             FUND II          FUND           FUND           FUND
                                          -------------   ------------   ------------   -------------
<S>                                       <C>             <C>            <C>            <C>
NET ASSETS consist of:
Undistributed net investment income.....  $    --         $     6,349    $     4,796    $     18,620
Accumulated net realized gain/(loss) on
  investments sold......................          (804)        10,185         (2,801)        (22,171)
Par value...............................       461,528         16,361         78,979         230,543
Paid-in capital in excess of par
  value.................................   461,066,092     16,344,938     78,899,743     230,312,664
                                          -------------   ------------   ------------   -------------
                                          $461,526,816    $16,377,833    $78,980,717    $230,539,656
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
NET ASSETS:
  Class A...............................  $423,115,889    $16,377,533    $78,980,417    $228,305,621
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
  Class B...............................  $ 38,410,727    $       100    $       100    $        100
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
  Class C...............................  $        100    $       100    $       100    $  2,233,835
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
  Class E...............................  $        100    $       100    $       100    $        100
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
SHARES OUTSTANDING:
  Class A...............................   423,116,657     16,360,999     78,978,422     228,309,225
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
  Class B...............................    38,410,773            100            100             100
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
  Class C...............................           100            100            100       2,233,782
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
  Class E...............................           100            100            100             100
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
CLASS A SHARES:
Net asset value, offering and redemption
  price per share.......................         $1.00          $1.00          $1.00           $1.00
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
CLASS B SHARES:
Net asset value, offering and redemption
  price per share.......................         $1.00          $1.00          $1.00           $1.00
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
CLASS C SHARES:
Net asset value, offering and redemption
  price per share.......................         $1.00          $1.00          $1.00           $1.00
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
CLASS E SHARES:
Net asset value, offering and redemption
  price per share.......................         $1.00          $1.00          $1.00           $1.00
                                          -------------   ------------   ------------   -------------
                                          -------------   ------------   ------------   -------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       31
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF OPERATIONS
FOR THE SIX MONTHS ENDED JULY 31, 1995 (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                                        GOVERNMENT
                                                             PRIME       PRIME VALUE    OBLIGATIONS      CASH
                                                         MONEY MARKET    MONEY MARKET      MONEY      MANAGEMENT
                                                             FUND            FUND       MARKET FUND      FUND
                                                         -------------   ------------   -----------   -----------
<S>                                                      <C>             <C>            <C>           <C>
INVESTMENT INCOME:
Interest...............................................  $130,085,451    $89,640,453    $2,183,426     $  73,443
                                                         -------------   ------------   -----------   -----------
EXPENSES:
Investment Advisory fee (Note 2).......................     2,088,422      1,435,566        35,482         1,199
Administration fee (Note 2)............................     2,088,422      1,435,566        35,482         1,199
Service fees (Note 3):
  Class B..............................................       512,557         44,267         8,484        --
  Class C..............................................        17,075        --                801        --
  Class E..............................................         7,693        --             --            --
Transfer Agent fees (Note 2)...........................       402,135        268,321         6,810        --
Custodian fees (Note 2)................................       220,823        158,910        10,525           410
Registration and filing fees...........................       243,532        171,922        25,454        23,057
Trustees' fees and expenses (Note 2)...................        20,786         20,382           525            37
Amortization of organization costs (Note 5)............         6,414          6,414         6,414         6,414
Other..................................................       394,589        264,432         5,905            49
Fees waived by Investment Adviser, Administrator and
  Custodian and/or expenses reimbursed by Investment
  Adviser (Note 2).....................................    (1,705,963)    (1,177,495)      (62,730)      (29,247)
                                                         -------------   ------------   -----------   -----------
  Total expenses.......................................     4,296,485      2,628,285        73,152         3,118
                                                         -------------   ------------   -----------   -----------
NET INVESTMENT INCOME..................................   125,788,966     87,012,168     2,110,274        70,325
                                                         -------------   ------------   -----------   -----------
NET REALIZED GAIN/(LOSS) ON INVESTMENTS (Note 1).......      (160,627)       166,865        --            --
                                                         -------------   ------------   -----------   -----------
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS...  $125,628,339    $87,179,033    $2,110,274     $  70,325
                                                         -------------   ------------   -----------   -----------
                                                         -------------   ------------   -----------   -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       32
<PAGE>
 
<TABLE>
<CAPTION>
                                                             100%
                                                           TREASURY
                                             TREASURY      INSTRUMENTS
                                           INSTRUMENTS       MONEY      TAX-FREE      MUNICIPAL
                                           MONEY MARKET     MARKET        MONEY         MONEY
                                             FUND II         FUND      MARKET FUND   MARKET FUND
                                          --------------   ---------   -----------   -----------
<S>                                       <C>              <C>         <C>           <C>
INVESTMENT INCOME:
Interest................................   $14,469,034     $976,246    $1,440,893    $3,634,692
                                          --------------   ---------   -----------   -----------
EXPENSES:
Investment Advisory fee (Note 2)........       242,254       16,883        35,236        85,948
Administration fee (Note 2).............       242,254       16,883        35,236        85,948
Service fees (Note 3):
  Class B...............................        50,454        --           --            --
  Class C...............................       --             --           --             2,458
  Class E...............................       --             --           --            --
Transfer Agent fees (Note 2)............        47,933        4,668         7,306        14,374
Custodian fees (Note 2).................        33,473        8,183        17,424        28,226
Registration and filing fees............        39,914       24,154        25,619        28,984
Trustees' fees and expenses (Note 2)....         3,769          514           625         1,189
Amortization of organization costs (Note
  5)....................................         6,414        6,414         6,414         6,414
Other...................................        44,816        5,089         5,138         7,750
Fees waived by Investment Adviser,
  Administrator and Custodian and/or
  expenses reimbursed by Investment
  Adviser (Note 2)......................      (224,769)     (52,398)      (69,573)     (104,127)
                                          --------------   ---------   -----------   -----------
  Total expenses........................       486,512       30,390        63,425       157,164
                                          --------------   ---------   -----------   -----------
NET INVESTMENT INCOME...................    13,982,522      945,856     1,377,468     3,477,528
                                          --------------   ---------   -----------   -----------
NET REALIZED GAIN/(LOSS) ON INVESTMENTS
  (Note 1)..............................          (804)       7,024          (483)        2,443
                                          --------------   ---------   -----------   -----------
NET INCREASE IN NET ASSETS RESULTING
  FROM OPERATIONS.......................   $13,981,718     $952,880    $1,376,985    $3,479,971
                                          --------------   ---------   -----------   -----------
                                          --------------   ---------   -----------   -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       33
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF CHANGES IN NET ASSETS
FOR THE SIX MONTHS ENDED JULY 31, 1995 (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                                              GOVERNMENT
                                                              PRIME          PRIME VALUE     OBLIGATIONS        CASH
                                                          MONEY MARKET      MONEY MARKET     MONEY MARKET    MANAGEMENT
                                                              FUND              FUND             FUND           FUND
                                                         ---------------   ---------------   ------------   ------------
<S>                                                      <C>               <C>               <C>            <C>
Net investment income..................................  $  125,788,966    $   87,012,168    $ 2,110,274    $    70,325
Net realized gain/(loss) on investments sold during the
  period...............................................        (160,627)          166,865        --             --
                                                         ---------------   ---------------   ------------   ------------
Net increase in net assets resulting from operations...     125,628,339        87,179,033      2,110,274         70,325
Distributions to shareholders from net investment
  income:
  Class A..............................................    (113,277,904)      (85,978,744)    (1,903,368)       (70,325)
  Class B..............................................     (11,931,149)       (1,033,424)      (194,025)       --
  Class C..............................................        (277,244)         --              (12,881)       --
  Class E..............................................        (302,669)         --              --             --
Net increase/(decrease) in net assets from share
  transactions (Note 4):
  Class A..............................................   2,769,808,419     1,989,802,253     44,858,941     (3,608,985)
  Class B..............................................     (26,355,403)        2,775,222      3,966,262        --
  Class C..............................................       6,235,881          --              608,720       (199,997)
  Class E..............................................      (3,745,608)         --              --             --
                                                         ---------------   ---------------   ------------   ------------
Net increase/(decrease) in net assets..................   2,745,782,662     1,992,744,340     49,433,923     (3,808,982)
NET ASSETS:
Beginning of period....................................   1,897,037,973     1,492,055,634     49,401,920      4,940,417
                                                         ---------------   ---------------   ------------   ------------
End of period..........................................  $4,642,820,635    $3,484,799,974    $98,835,843    $ 1,131,435
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
Undistributed net investment income....................  $       19,757    $        1,576    $     1,817        --
                                                         ---------------   ---------------   ------------   ------------
                                                         ---------------   ---------------   ------------   ------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       34
<PAGE>
 
<TABLE>
<CAPTION>
                                             TREASURY      100% TREASURY
                                           INSTRUMENTS      INSTRUMENTS      TAX-FREE       MUNICIPAL
                                           MONEY MARKET    MONEY MARKET    MONEY MARKET   MONEY MARKET
                                             FUND II           FUND            FUND           FUND
                                          --------------   -------------   ------------   -------------
<S>                                       <C>              <C>             <C>            <C>
Net investment income...................   $ 13,982,522    $    945,856    $ 1,377,468    $  3,477,528
Net realized gain/(loss) on investments
  sold during the period................           (804)          7,024           (483)          2,443
                                          --------------   -------------   ------------   -------------
Net increase in net assets resulting
  from operations.......................     13,981,718         952,880      1,376,985       3,479,971
Distributions to shareholders from net
  investment income:
  Class A...............................    (12,870,242)       (945,856)    (1,377,468)     (3,451,587)
  Class B...............................     (1,112,280)        --             --              --
  Class C...............................       --               --             --              (25,941)
  Class E...............................       --               --             --              --
Net increase/(decrease) in net assets
  from share transactions (Note 4):
  Class A...............................     54,320,243     (62,445,338)    18,630,363     134,707,949
  Class B...............................     11,169,133         --             --              --
  Class C...............................       --               --             --            2,233,682
  Class E...............................       --               --             --              --
                                          --------------   -------------   ------------   -------------
Net increase/(decrease) in net assets...     65,488,572     (62,438,314)    18,629,880     136,944,074
NET ASSETS:
Beginning of period.....................    396,038,244      78,816,147     60,350,837      93,595,582
                                          --------------   -------------   ------------   -------------
End of period...........................   $461,526,816    $ 16,377,833    $78,980,717    $230,539,656
                                          --------------   -------------   ------------   -------------
                                          --------------   -------------   ------------   -------------
Undistributed net investment income.....       --          $      6,349    $     4,796    $     18,620
                                          --------------   -------------   ------------   -------------
                                          --------------   -------------   ------------   -------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       35
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF CHANGES IN NET ASSETS
FOR THE YEAR ENDED JANUARY 31, 1995
 
<TABLE>
<CAPTION>
                                                                                               GOVERNMENT
                                                              PRIME          PRIME VALUE       OBLIGATIONS        CASH
                                                          MONEY MARKET       MONEY MARKET     MONEY MARKET     MANAGEMENT
                                                              FUND               FUND             FUND            FUND
                                                         ---------------   ----------------   -------------   -------------
<S>                                                      <C>               <C>                <C>             <C>
Net investment income..................................  $  101,794,050    $    77,945,091    $  3,673,525    $    419,901
Net realized gain/(loss) on investments sold during the
  year.................................................         (18,737)          (326,519)         (4,414)            102
                                                         ---------------   ----------------   -------------   -------------
Net increase in net assets resulting from operations...     101,775,313         77,618,572       3,669,111         420,003
Distributions to shareholders from net investment
  income:
  Class A..............................................     (88,718,314)       (77,274,366)     (3,323,563)       (419,337)
  Class B..............................................     (12,134,365)          (670,725)       (349,962)           (532)
  Class C..............................................        (746,966)         --                --                  (32)
  Class E..............................................        (194,405)         --                --              --
Net increase/(decrease) in net assets from share
  transactions (Note 4):
  Class A..............................................  (1,327,533,646)    (2,510,545,069)    (81,449,488)    (36,969,270)
  Class B..............................................      (7,991,572)         4,239,335       9,323,178         --
  Class C..............................................       7,244,790          --                --              200,007
  Class D..............................................        --                  (10,123)           (100)        --
  Class E..............................................       8,317,899                100             100             100
                                                         ---------------   ----------------   -------------   -------------
Net increase/(decrease) in net assets..................  (1,319,981,266)    (2,506,642,276)    (72,130,724)    (36,769,061)
NET ASSETS:
Beginning of year......................................   3,217,019,239      3,998,697,910     121,532,644      41,709,478
                                                         ---------------   ----------------   -------------   -------------
End of year............................................  $1,897,037,973    $ 1,492,055,634    $ 49,401,920    $  4,940,417
                                                         ---------------   ----------------   -------------   -------------
                                                         ---------------   ----------------   -------------   -------------
Undistributed net investment income....................  $       19,757    $         1,576    $      1,817         --
                                                         ---------------   ----------------   -------------   -------------
                                                         ---------------   ----------------   -------------   -------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       36
<PAGE>
 
<TABLE>
<CAPTION>
                                             TREASURY      100% TREASURY
                                           INSTRUMENTS      INSTRUMENTS      TAX-FREE       MUNICIPAL
                                           MONEY MARKET    MONEY MARKET    MONEY MARKET    MONEY MARKET
                                             FUND II           FUND            FUND            FUND
                                          --------------   -------------   ------------   --------------
<S>                                       <C>              <C>             <C>            <C>
Net investment income...................   $ 15,579,788    $  3,069,780    $ 1,770,870    $   6,387,890
Net realized gain/(loss) on investments
  sold during the year..................       --                 3,161         (2,318)         (24,497)
                                          --------------   -------------   ------------   --------------
Net increase in net assets resulting
  from operations.......................     15,579,788       3,072,941      1,768,552        6,363,393
Distributions to shareholders from net
  investment income:
  Class A...............................    (14,277,430)     (3,069,780)    (1,770,323)      (6,387,890)
  Class B...............................     (1,302,358)        --                (547)        --
  Class C...............................       --               --             --              --
  Class E...............................       --               --             --              --
Net increase/(decrease) in net assets
  from share transactions (Note 4):
  Class A...............................    212,014,666     (48,650,249)       618,269     (257,354,964)
  Class B...............................     (6,619,950)        --             --              --
  Class C...............................       --               --             --              --
  Class D...............................       --               --             --                  (100)
  Class E...............................            100             100            100              100
                                          --------------   -------------   ------------   --------------
Net increase/(decrease) in net assets...    205,394,816     (48,646,988)       616,051     (257,379,461)
NET ASSETS:
Beginning of year.......................    190,643,428     127,463,135     59,734,786      350,975,043
                                          --------------   -------------   ------------   --------------
End of year.............................   $396,038,244    $ 78,816,147    $60,350,837    $  93,595,582
                                          --------------   -------------   ------------   --------------
                                          --------------   -------------   ------------   --------------
Undistributed net investment income.....       --          $      6,349    $     4,796    $      18,620
                                          --------------   -------------   ------------   --------------
                                          --------------   -------------   ------------   --------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       37
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD.
                            PRIME MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                                        SIX MONTHS
                                                           ENDED        YEAR        PERIOD
                                                          7/31/95       ENDED        ENDED
                                                        (UNAUDITED)    1/31/95     1/31/94*
                                                        -----------  -----------  -----------
<S>                                                     <C>          <C>          <C>
                                                          CLASS A      CLASS A      CLASS A
                                                        -----------  -----------  -----------
Net asset value, beginning of period................... $     1.00   $      1.00  $      1.00
                                                        -----------  -----------  -----------
Net investment income..................................     0.0300        0.0442       0.0310
Dividends from net investment income...................    (0.0300)      (0.0442)     (0.0310)
                                                        -----------  -----------  -----------
Net asset value, end of period......................... $     1.00   $      1.00  $      1.00
                                                        -----------  -----------  -----------
                                                        -----------  -----------  -----------
Total return++.........................................      3.05%         4.52%        3.14%
                                                        -----------  -----------  -----------
                                                        -----------  -----------  -----------
Ratios to average net assets/supplemental data:
  Net assets, end of period (in 000's)................. $4,308,465   $ 1,538,802  $ 2,866,353
  Ratio of net investment income to average net
   assets..............................................      6.05%+        4.30%        3.16%+
  Ratio of operating expenses to average net assets....      0.18%+        0.12%        0.11%+
  Ratio of operating expenses to average net assets
   before fees waived by the Investment Adviser,
   Administrator, Custodian and/or Transfer Agent
   and/or expenses reimbursed by the Investment Adviser
   and Administrator...................................      0.26%+        0.25%        0.33%+
  Net investment income per share before waiver of fees
   by the Investment Adviser, Administrator, Custodian
   and/or Transfer Agent and/or expenses reimbursed by
   the Investment Adviser and Administrator............ $   0.0296   $    0.0428  $    0.0289
</TABLE>
 
- ------------------------
 * The Prime Money Market Fund Class A, Class B, Class C and Class E Shares
   commenced operations on February 8, 1993, September 2, 1993, December 27,
   1993, and October 6, 1994, respectively.
** All shares offered to the public on December 27, 1993 were redeemed on
   December 28, 1993; therefore, total return deemed not to be meaningful.
 + Annualized.
++ Total return represents aggregate total return for the periods indicated.
 # Total net assets for Class C were $100 at January 31, 1994.
 
                       See Notes to Financial Statements.
 
                                       38
<PAGE>
 
<TABLE>
<CAPTION>
                                            SIX                              SIX                              SIX
                                          MONTHS                           MONTHS                           MONTHS
                                           ENDED      YEAR      PERIOD      ENDED      YEAR      PERIOD      ENDED     PERIOD
                                          7/31/95     ENDED      ENDED     7/31/95     ENDED      ENDED     7/31/95     ENDED
                                         (UNAUDITED)  1/31/95  1/31/94*   (UNAUDITED)  1/31/95  1/31/94*   (UNAUDITED) 1/31/95*
                                         ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                                      <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
                                          CLASS B    CLASS B    CLASS B    CLASS C    CLASS C    CLASS C    CLASS E    CLASS E
                                         ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Net asset value, beginning of period.... $   1.00   $    1.00  $    1.00  $   1.00   $    1.00  $   1.00   $   1.00   $   1.00
                                         ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Net investment income...................   0.0288      0.0417     0.0110    0.0283      0.0407    0.0001     0.0293     0.0165
Dividends from net investment income....  (0.0288)    (0.0417)   (0.0110)  (0.0283)    (0.0407)  (0.0001)   (0.0293)   (0.0165)
                                         ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Net asset value, end of period.......... $   1.00   $    1.00  $    1.00  $   1.00   $    1.00  $   1.00   $   1.00   $   1.00
                                         ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                         ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Total return++..........................    2.93%       4.21%      0.99%     2.86%       4.14%   -- **        2.98%      1.66%
                                         ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                         ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Ratios to average net
  assets/supplemental data:
  Net assets, end of period (in
   000's)............................... $316,304   $ 342,673  $ 350,666  $ 13,480   $   7,245    -- #     $  4,572   $  8,318
  Ratio of net investment income to
   average net assets...................    5.80%+      4.05%      2.91%+    5.70%+      3.95%     2.81%+     5.90%+     4.15%+
  Ratio of operating expenses to average
   net assets...........................    0.43%+      0.37%      0.36%+    0.53%+      0.47%     0.46%+     0.33%+     0.27%+
  Ratio of operating expenses to average
   net assets before fees waived by the
   Investment Adviser, Administrator,
   Custodian and/or Transfer Agent
   and/or expenses reimbursed by the
   Investment Adviser and
   Administrator........................    0.51%+      0.50%      0.58%+    0.61%+      0.60%     0.68%+     0.41%+     0.39%+
  Net investment income per share before
   waiver of fees by the Investment
   Adviser, Administrator, Custodian
   and/or Transfer Agent and/or expenses
   reimbursed by the Investment Adviser
   and Administrator.................... $ 0.0284   $  0.0403  $  0.0102  $ 0.0279   $  0.0393  $ 0.0001   $ 0.0289   $ 0.0160
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       39
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD.
                         PRIME VALUE MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                                         SIX MONTHS
                                                            ENDED         YEAR         PERIOD
                                                           7/31/95        ENDED         ENDED
                                                         (UNAUDITED)     1/31/95      1/31/94*
                                                         -----------   -----------   -----------
<S>                                                      <C>           <C>           <C>
                                                           CLASS A       CLASS A       CLASS A
                                                         -----------   -----------   -----------
Net asset value, beginning of period...................  $     1.00    $      1.00   $      1.00
                                                         -----------   -----------   -----------
Net investment income..................................      0.0301         0.0442        0.0315
Dividends from net investment income...................     (0.0301)       (0.0442)      (0.0315)
                                                         -----------   -----------   -----------
Net asset value, end of period.........................  $     1.00    $      1.00   $      1.00
                                                         -----------   -----------   -----------
                                                         -----------   -----------   -----------
Total return++.........................................       3.05%          4.51%         3.21%
                                                         -----------   -----------   -----------
                                                         -----------   -----------   -----------
Ratios to average net assets/supplemental data:
  Net assets, end of period (in 000's).................  $3,460,284    $ 1,470,317   $ 3,981,184
  Ratio of net investment income to average net
   assets..............................................       6.06%+         4.20%         3.23%+
  Ratio of operating expenses to average net assets....       0.18%+         0.09%         0.07%+
  Ratio of operating expenses to average net assets
   before fees waived by the Investment Adviser,
   Administrator, Custodian and/or Transfer Agent
   and/or expenses reimbursed by the Investment Adviser
   and Administrator...................................       0.26%+         0.25%         0.36%+
  Net investment income per share before waiver of fees
   by the Investment Adviser, Administrator, Custodian
   and/or Transfer Agent and/or expenses reimbursed by
   the Investment Adviser and Administrator............  $   0.0297    $    0.0426   $    0.0287
</TABLE>
 
- ------------------------
 * The Prime Value Money Market Fund Class A and Class B Shares commenced
   operations on February 8, 1993 and September 1, 1993, respectively.
 + Annualized.
++ Total return represents aggregate total return for the periods indicated.
 
                       See Notes to Financial Statements.
 
                                       40
<PAGE>
 
<TABLE>
<CAPTION>
                                             SIX
                                           MONTHS
                                            ENDED       YEAR       PERIOD
                                           7/31/95      ENDED       ENDED
                                          (UNAUDITED)  1/31/95    1/31/94*
                                          ---------   ---------   ---------
<S>                                       <C>         <C>         <C>
                                           CLASS B     CLASS B     CLASS B
                                          ---------   ---------   ---------
Net asset value, beginning of period....  $   1.00    $    1.00   $   1.00
                                          ---------   ---------   ---------
Net investment income...................    0.0289       0.0417     0.0125
Dividends from net investment income....   (0.0289)     (0.0417)   (0.0125)
                                          ---------   ---------   ---------
Net asset value, end of period..........  $   1.00    $    1.00   $   1.00
                                          ---------   ---------   ---------
                                          ---------   ---------   ---------
Total return++..........................     2.93%        4.26%      1.26%
                                          ---------   ---------   ---------
                                          ---------   ---------   ---------
Ratios to average net
  assets/supplemental data:
  Net assets, end of period (in
   000's)...............................  $ 24,516    $  21,739   $ 17,504
  Ratio of net investment income to
   average net assets...................     5.81%+       3.95%      2.98%+
  Ratio of operating expenses to average
   net assets...........................     0.43%+       0.34%      0.32%+
  Ratio of operating expenses to average
   net assets before fees waived by the
   Investment Adviser, Administrator,
   Custodian and/or Transfer Agent
   and/or expenses reimbursed by the
   Investment Adviser and
   Administrator........................     0.51%+       0.50%      0.61%+
  Net investment income per share before
   waiver of fees by the Investment
   Adviser, Administrator, Custodian
   and/or Transfer Agent and/or expenses
   reimbursed by the Investment Adviser
   and Administrator....................  $ 0.0285    $  0.0398   $ 0.0113
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       41
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD.
                    GOVERNMENT OBLIGATIONS MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                                            SIX
                                                          MONTHS
                                                           ENDED       YEAR       PERIOD
                                                          7/31/95      ENDED       ENDED
                                                         (UNAUDITED)  1/31/95    1/31/94*
                                                         ---------   ---------   ---------
<S>                                                      <C>         <C>         <C>
                                                          CLASS A     CLASS A     CLASS A
                                                         ---------   ---------   ---------
Net asset value, beginning of period...................  $   1.00    $    1.00   $    1.00
                                                         ---------   ---------   ---------
Net investment income..................................    0.0297       0.0435      0.0309
Dividends from net investment income...................   (0.0297)     (0.0435)    (0.0309)
                                                         ---------   ---------   ---------
Net asset value, end of period.........................  $   1.00    $    1.00   $    1.00
                                                         ---------   ---------   ---------
                                                         ---------   ---------   ---------
Total return++.........................................     3.01%        4.45%       3.14%
                                                         ---------   ---------   ---------
                                                         ---------   ---------   ---------
Ratios to average net assets/supplemental data:
  Net assets, end of period (in 000's).................  $ 84,939    $  40,080   $ 121,532
  Ratio of net investment income to average net
   assets..............................................     5.97%+       4.28%       3.18%+
  Ratio of operating expenses to average net assets....     0.18%+       0.16%       0.03%+
  Ratio of operating expenses to average net assets
   before fees waived by the Investment Adviser,
   Administrator, Custodian and/ or Transfer Agent
   and/or expenses reimbursed by the Investment Adviser
   and Administrator...................................     0.36%+       0.31%       0.53%+
  Net investment income per share before waiver of fees
   by the Investment Adviser, Administrator, Custodian
   and/or Transfer Agent and/or expenses reimbursed by
   the Investment Adviser and Administrator............  $ 0.0288    $  0.0419   $  0.0261
</TABLE>
 
- ------------------------
 * The Government Obligations Money Market Fund Class A, Class B and Class C
   Shares commenced operations on February 8, 1993, August 16, 1993 and April
   18, 1995, respectively.
 + Annualized.
++ Total return represents aggregate total return for the periods indicated.
 # Total net assets for Class B were $100 at January 31, 1994.
 
                       See Notes to Financial Statements.
 
                                       42
<PAGE>
 
<TABLE>
<CAPTION>
                                             SIX
                                           MONTHS                              PERIOD
                                            ENDED       YEAR       PERIOD       ENDED
                                           7/31/95      ENDED       ENDED     7/31/95*
                                          (UNAUDITED)  1/31/95    1/31/94*    (UNAUDITED)
                                          ---------   ---------   ---------   ---------
<S>                                       <C>         <C>         <C>         <C>
                                           CLASS B     CLASS B     CLASS B     CLASS C
                                          ---------   ---------   ---------   ---------
Net asset value, beginning of period....  $   1.00    $    1.00   $   1.00    $   1.00
                                          ---------   ---------   ---------   ---------
Net investment income...................    0.0285       0.0410     0.0091      0.0162
Dividends from net investment income....   (0.0285)     (0.0410)   (0.0091)    (0.0162)
                                          ---------   ---------   ---------   ---------
Net asset value, end of period..........  $   1.00    $    1.00   $   1.00    $   1.00
                                          ---------   ---------   ---------   ---------
                                          ---------   ---------   ---------   ---------
Total return++..........................     2.88%        4.19%      0.90%       1.43%
                                          ---------   ---------   ---------   ---------
                                          ---------   ---------   ---------   ---------
Ratios to average net
  assets/supplemental data:
  Net assets, end of period (in
   000's)...............................  $ 13,288    $   9,322     -- #      $    609
  Ratio of net investment income to
   average net assets...................     5.72%+       4.03%      2.93%+      5.62%+
  Ratio of operating expenses to average
   net assets...........................     0.43%+       0.41%      0.28%+      0.53%+
  Ratio of operating expenses to average
   net assets before fees waived by the
   Investment Adviser, Administrator,
   Custodian and/ or Transfer Agent
   and/or expenses reimbursed by the
   Investment Adviser and
   Administrator........................     0.61%+       0.56%      0.78%+      0.71%+
  Net investment income per share before
   waiver of fees by the Investment
   Adviser, Administrator, Custodian
   and/or Transfer Agent and/or expenses
   reimbursed by the Investment Adviser
   and Administrator....................  $ 0.0276    $  0.0394   $ 0.0075    $ 0.0153
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       43
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD.
                              CASH MANAGEMENT FUND
 
<TABLE>
<CAPTION>
                                                            SIX
                                                          MONTHS
                                                           ENDED       YEAR       PERIOD
                                                          7/31/95      ENDED       ENDED
                                                         (UNAUDITED)  1/31/95    1/31/94*
                                                         ---------   ---------   ---------
<S>                                                      <C>         <C>         <C>
                                                          CLASS A     CLASS A     CLASS A
                                                         ---------   ---------   ---------
Net asset value, beginning of period...................  $   1.00    $    1.00   $    1.00
                                                         ---------   ---------   ---------
Net investment income..................................    0.0297       0.0421      0.0304
Dividends from net investment income...................   (0.0297)     (0.0421)    (0.0304)
                                                         ---------   ---------   ---------
Net asset value, end of period.........................  $   1.00    $    1.00   $    1.00
                                                         ---------   ---------   ---------
                                                         ---------   ---------   ---------
Total return++.........................................     3.01%        4.26%       3.09%
                                                         ---------   ---------   ---------
                                                         ---------   ---------   ---------
Ratios to average net assets/supplemental data:
  Net assets, end of period (in 000's).................  $  1,131    $   4,740   $  41,709
  Ratio of net investment income to average net
   assets..............................................     5.86%+       3.52%       3.11%+
  Ratio of operating expenses to average net assets....     0.26%+       0.17%       0.06%+
  Ratio of operating expenses to average net assets
   before fees waived by the Investment Adviser,
   Administrator, Custodian and/ or Transfer Agent
   and/or expenses reimbursed by the Investment Adviser
   and Administrator...................................     2.70%+       0.77%       0.92%+
  Net investment income per share before waiver of fees
   by the Investment Adviser, Administrator, Custodian
   and/or Transfer Agent and/or expenses reimbursed by
   the Investment Adviser and Administrator............  $ 0.0173    $  0.0350   $  0.0220
</TABLE>
 
- ------------------------
 * The Cash Management Fund (formerly 100% Government Obligations Money Market
   Fund) Class A, Class B and Class C Shares commenced operations on February 8,
   1993, January 19, 1995 and January 31, 1995, respectively.
** All shares offered to the public on January 19, 1995 were redeemed on January
   20, 1995; therefore, total return deemed not to be meaningful.
 + Annualized.
++ Total return represents aggregate total return for the periods indicated.
 # Total net assets for Class B and C were $100 and $110 at July 31, 1995,
   respectively.
  Total net assets for Class B were $100 at January 31, 1995.
 
                       See Notes to Financial Statements.
 
                                       44
<PAGE>
 
<TABLE>
<CAPTION>
                                             SIX                     SIX
                                           MONTHS                  MONTHS
                                            ENDED      PERIOD       ENDED      PERIOD
                                           7/31/95      ENDED      7/31/95      ENDED
                                          (UNAUDITED) 1/31/95*    (UNAUDITED) 1/31/95*
                                          ---------   ---------   ---------   ---------
<S>                                       <C>         <C>         <C>         <C>
                                           CLASS B     CLASS B     CLASS C     CLASS C
                                          ---------   ---------   ---------   ---------
Net asset value, beginning of period....  $   1.00    $   1.00    $   1.00    $   1.00
                                          ---------   ---------   ---------   ---------
Net investment income...................    0.0284      0.0001      0.0280      0.0001
Dividends from net investment income....   (0.0284)    (0.0001)    (0.0280)    (0.0001)
                                          ---------   ---------   ---------   ---------
Net asset value, end of period..........  $   1.00    $   1.00    $   1.00    $   1.00
                                          ---------   ---------   ---------   ---------
                                          ---------   ---------   ---------   ---------
Total return++..........................   -- **       -- **         2.85%       0.01%
                                          ---------   ---------   ---------   ---------
                                          ---------   ---------   ---------   ---------
Ratios to average net
  assets/supplemental data:
  Net assets, end of period (in
   000's)...............................    -- #        -- #        -- #      $    200
  Ratio of net investment income to
   average net assets...................     5.61%+      3.27%+      5.51%+      3.17%+
  Ratio of operating expenses to average
   net assets...........................     0.51%+      0.42%+      0.61%+      0.52%+
  Ratio of operating expenses to average
   net assets before fees waived by the
   Investment Adviser, Administrator,
   Custodian and/ or Transfer Agent
   and/or expenses reimbursed by the
   Investment Adviser and
   Administrator........................     2.95%+      1.02%+      3.05%+      1.12%+
  Net investment income per share before
   waiver of fees by the Investment
   Adviser, Administrator, Custodian
   and/or Transfer Agent and/or expenses
   reimbursed by the Investment Adviser
   and Administrator....................  $ 0.0160    $ 0.0001    $ 0.0156    $ 0.0001
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       45
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD.
                   TREASURY INSTRUMENTS MONEY MARKET FUND II
 
<TABLE>
<CAPTION>
                                                           SIX
                                                          MONTHS
                                                          ENDED       YEAR      PERIOD
                                                         7/31/95     ENDED      ENDED
                                                         (UNAUDITED) 1/31/95   1/31/94*
                                                         --------   --------   --------
<S>                                                      <C>        <C>        <C>
                                                         CLASS A    CLASS A    CLASS A
                                                         --------   --------   --------
Net asset value, beginning of period...................  $  1.00    $   1.00   $   1.00
                                                         --------   --------   --------
Net investment income..................................   0.0287      0.0424     0.0300
Dividends from net investment income...................  (0.0287)    (0.0424)   (0.0300)
                                                         --------   --------   --------
Net asset value, end of period.........................  $  1.00    $   1.00   $   1.00
                                                         --------   --------   --------
                                                         --------   --------   --------
Total return++.........................................    2.90%       4.32%      3.04%
                                                         --------   --------   --------
                                                         --------   --------   --------
Ratios to average net assets/supplemental data:
  Net assets, end of period (in 000's).................  $423,116   $368,796   $156,782
  Ratio of net investment income to average net
   assets..............................................    5.79%+      4.38%      3.12%+
  Ratio of operating expenses to average net assets....    0.18%+      0.12%      0.03%+
  Ratio of operating expenses to average net assets
   before fees waived by the Investment Adviser,
   Administrator, Custodian and/ or Transfer Agent
   and/or expenses reimbursed by the Investment Adviser
   and Administrator...................................    0.27%+      0.27%      0.49%+
  Net investment income per share before waiver of fees
   by the Investment Adviser, Administrator, Custodian
   and/or Transfer Agent and/or expenses reimbursed by
   the Investment Adviser and Administrator............  $0.0282    $ 0.0407   $ 0.0256
</TABLE>
 
- ------------------------
 * The Treasury Instruments Money Market Fund II Class A and Class B Shares
   commenced operations on February 8, 1993 and May 24, 1993, respectively.
 + Annualized.
++ Total return represents aggregate total return for the periods indicated.
 
                       See Notes to Financial Statements.
 
                                       46
<PAGE>
 
<TABLE>
<CAPTION>
                                            SIX
                                           MONTHS
                                           ENDED       YEAR      PERIOD
                                          7/31/95     ENDED      ENDED
                                          (UNAUDITED) 1/31/95   1/31/94*
                                          --------   --------   --------
<S>                                       <C>        <C>        <C>
                                          CLASS B    CLASS B    CLASS B
                                          --------   --------   --------
Net asset value, beginning of period....  $  1.00    $   1.00   $   1.00
                                          --------   --------   --------
Net investment income...................   0.0275      0.0399     0.0198
Dividends from net investment income....  (0.0275)    (0.0399)   (0.0198)
                                          --------   --------   --------
Net asset value, end of period..........  $  1.00    $   1.00   $   1.00
                                          --------   --------   --------
                                          --------   --------   --------
Total return++..........................    2.77%       4.05%      2.00%
                                          --------   --------   --------
                                          --------   --------   --------
Ratios to average net
  assets/supplemental data:
  Net assets, end of period (in
   000's)...............................  $38,411    $ 27,242   $ 33,862
  Ratio of net investment income to
   average net assets...................    5.54%+      4.13%      2.87%+
  Ratio of operating expenses to average
   net assets...........................    0.43%+      0.37%      0.28%+
  Ratio of operating expenses to average
   net assets before fees waived by the
   Investment Adviser, Administrator,
   Custodian and/ or Transfer Agent
   and/or expenses reimbursed by the
   Investment Adviser and
   Administrator........................    0.52%+      0.52%      0.74%+
  Net investment income per share before
   waiver of fees by the Investment
   Adviser, Administrator, Custodian
   and/or Transfer Agent and/or expenses
   reimbursed by the Investment Adviser
   and Administrator....................  $0.0270    $ 0.0384   $ 0.0166
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       47
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD.
                  100% TREASURY INSTRUMENTS MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                                               SIX
                                                             MONTHS
                                                              ENDED       YEAR       PERIOD      PERIOD
                                                             7/31/95      ENDED       ENDED       ENDED
                                                            (UNAUDITED)  1/31/95    1/31/94*    1/31/94*
                                                            ---------   ---------   ---------   ---------
<S>                                                         <C>         <C>         <C>         <C>
                                                             CLASS A     CLASS A     CLASS A     CLASS B
                                                            ---------   ---------   ---------   ---------
Net asset value, beginning of period......................  $   1.00    $    1.00   $    1.00   $   1.00
                                                            ---------   ---------   ---------   ---------
Net investment income.....................................    0.0278       0.0408      0.0292     0.0149
Dividends from net investment income......................   (0.0278)     (0.0408)    (0.0292)   (0.0149)
                                                            ---------   ---------   ---------   ---------
Net asset value, end of period............................  $   1.00    $    1.00   $    1.00   $   1.00
                                                            ---------   ---------   ---------   ---------
                                                            ---------   ---------   ---------   ---------
Total return++............................................     2.81%        4.17%       2.95%      1.55%
                                                            ---------   ---------   ---------   ---------
                                                            ---------   ---------   ---------   ---------
Ratios to average net assets/supplemental data:
  Net assets, end of period (in 000's)....................  $ 16,378    $  78,816   $ 127,463     -- #
  Ratio of net investment income to average net assets....     5.60%+       4.06%       3.03%+     2.78%+
  Ratio of operating expenses to average net assets.......     0.18%+       0.16%       0.05%+     0.30%+
  Ratio of operating expenses to average net assets before
   fees waived by the Investment Adviser, Administrator,
   Custodian and/or Transfer Agent and/or expenses
   reimbursed by the Investment Adviser and
   Administrator..........................................     0.49%+       0.33%       0.51%+     0.76%+
  Net investment income per share before waiver of fees by
   the Investment Adviser, Administrator, Custodian and/or
   Transfer Agent and/or expenses reimbursed by the
   Investment Adviser and Administrator...................  $ 0.0262    $  0.0391   $  0.0248   $ 0.0124
<FN>
- ------------------------
 * The 100% Treasury Instruments Money Market Fund Class A and Class B Shares
   commenced operations on February 8, 1993 and May 2, 1993, respectively.
 + Annualized.
++ Total return represents aggregate total return for the periods indicated.
 # Total net assets for Class B were $100 at January 31, 1994.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       48
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD.
 
                           TAX-FREE MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                 SIX                                 SIX
                               MONTHS                              MONTHS
                                ENDED       YEAR       PERIOD       ENDED      PERIOD
                               7/31/95      ENDED       ENDED      7/31/95      ENDED
                              (UNAUDITED)  1/31/95    1/31/94*    (UNAUDITED) 1/31/95*
                              ---------   ---------   ---------   ---------   ---------
<S>                           <C>         <C>         <C>         <C>         <C>
                               CLASS A     CLASS A     CLASS A     CLASS B     CLASS B
                              ---------   ---------   ---------   ---------   ---------
Net asset value, beginning
 of period..................  $   1.00    $    1.00   $   1.00    $   1.00    $    1.00
                              ---------   ---------   ---------   ---------   ---------
Net investment income.......    0.0194       0.0288     0.0228      0.0182       0.0030
Dividends from net
 investment income..........   (0.0194)     (0.0288)   (0.0228)    (0.0182)     (0.0030)
                              ---------   ---------   ---------   ---------   ---------
Net asset value, end of
 period.....................  $   1.00    $    1.00   $   1.00    $   1.00    $    1.00
                              ---------   ---------   ---------   ---------   ---------
                              ---------   ---------   ---------   ---------   ---------
Total return++..............     1.97%        2.93%      2.30%       1.84%        0.30%
                              ---------   ---------   ---------   ---------   ---------
                              ---------   ---------   ---------   ---------   ---------
Ratios to average net
 assets/supplemental data:
  Net assets, end of period
   (in 000's)...............  $ 78,980    $  60,351   $ 59,735      -- #        -- #
  Ratio of net investment
   income to average
   net assets...............     3.91%+       2.99%      2.38%+      3.66%+       2.74%+
  Ratio of operating
   expenses to average
   net assets...............     0.18%+       0.16%      0.11%+      0.43%+       0.41%+
  Ratio of operating
   expenses to average net
   assets before fees waived
   by the Investment
   Adviser, Administrator,
   Custodian and/or Transfer
   Agent and/or expenses
   reimbursed by the
   Investment Adviser and
   Administrator............     0.38%+       0.38%      1.52%+      0.63%+       0.63%+
  Net investment income per
   share before waiver of
   fees by the Investment
   Adviser, Administrator,
   Custodian and/or Transfer
   Agent and/or expenses
   reimbursed by the
   Investment Adviser and
   Administrator............  $ 0.0184    $  0.0266   $ 0.0093    $ 0.0172    $  0.0009
<FN>
- ------------------------
 * The Tax-Free Money Market Fund Class A and Class B Shares commenced
   operations on February 8, 1993 and December 30, 1994, respectively.
 + Annualized.
++ Total return represents aggregate total return for the periods indicated.
 # Total net assets for Class B were $100 at July 31, 1995 and January 31, 1995.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       49
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD.
 
                          MUNICIPAL MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                 SIX
                               MONTHS                                PERIOD
                                ENDED       YEAR        PERIOD       ENDED
                               7/31/95      ENDED       ENDED       7/31/95*
                              (UNAUDITED)  1/31/95     1/31/94*    (UNAUDITED)
                              ---------   ---------   ----------   ----------
<S>                           <C>         <C>         <C>          <C>
                               CLASS A     CLASS A     CLASS A      CLASS C
                              ---------   ---------   ----------   ----------
Net asset value, beginning
 of period..................  $   1.00    $    1.00   $     1.00   $   1.00
                              ---------   ---------   ----------   ----------
Net investment income.......    0.0200       0.0300       0.0243     0.0093
Dividends from net
 investment income..........   (0.0200)     (0.0300)     (0.0243)   (0.0093)
                              ---------   ---------   ----------   ----------
Net asset value, end of
 period.....................  $   1.00    $    1.00   $     1.00   $   1.00
                              ---------   ---------   ----------   ----------
                              ---------   ---------   ----------   ----------
Total return++..............     2.03%        3.04%        2.46%      0.93%
                              ---------   ---------   ----------   ----------
                              ---------   ---------   ----------   ----------
Ratios to average net
 assets/supplemental data:
  Net assets, end of period
   (in 000's)...............  $228,306    $  93,595   $  350,975   $  2,234
  Ratio of net investment
   income to average net
   assets...................     4.05%+       2.86%        2.53%+     3.70%+
  Ratio of operating
   expenses to average net
   assets...................     0.18%+       0.15%        0.13%+     0.53%+
  Ratio of operating
   expenses to average net
   assets before fees waived
   by the Investment
   Adviser, Administrator,
   Custodian and/or Transfer
   Agent and/or expenses
   reimbursed by the
   Investment Adviser and
   Administrator............     0.30%+       0.31%        0.51%+     0.65%+
  Net investment income per
   share before waiver of
   fees by the Investment
   Adviser, Administrator,
   Custodian and/or Transfer
   Agent and/or expenses
   reimbursed by the
   Investment Adviser and
   Administrator............  $ 0.0194    $  0.0283   $   0.0201   $ 0.0087
<FN>
- ------------------------
 * The Municipal Money Market Fund Class A and Class C Shares commenced
   operations on February 8, 1993 and April 14, 1995, respectively.
 + Annualized.
++ Total return represents aggregate total return for the periods indicated.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       50
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (UNAUDITED)
 
1. SIGNIFICANT ACCOUNTING POLICIES
 
    Lehman   Brothers  Institutional   Funds  Group  Trust   (the  "Trust")  was
established on November  25, 1992 as  a Massachusetts business  trust. It is  an
open-end management investment company, which consists of eight funds offered to
the  public: Prime Money Market Fund,  Prime Value Money Market Fund, Government
Obligations Money Market Fund, Cash Management Fund (formerly known as the  100%
Government  Obligations Money  Market Fund),  Treasury Instruments  Money Market
Fund II, 100% Treasury Instruments Money Market Fund, Tax-Free Money Market Fund
and Municipal  Money Market  Fund,  (collectively the  "Funds"). All  the  Funds
except  Cash Management  Fund currently offer  four classes of  shares: Class A,
Class B,  Class  C, and  Class  E. Class  A  shares are  sold  to  institutional
investors  that have not entered into servicing agreements. Class B, Class C and
Class E shares are  sold to institutional investors  and bear service fees.  All
classes  of shares  have identical  rights and  privileges except  that Class B,
Class C and Class E possess certain exclusive voting rights on matters  relating
to  their respective service fees. The Prime Value Money Market Fund, Government
Obligations Money Market Fund  and Municipal Money Market  Fund offered Class  D
shares  to certain individual  investors, but ceased offering  such shares as of
March 28, 1994.  The Cash  Management Fund ceased  offering shares  of Class  B,
Class C and Class E on May 31, 1995. Shares of the Floating Rate U.S. Government
Fund  and the  Short Duration U.S.  Government Fund  were no longer  sold to the
public as of July 28, 1995, and such Funds ceased to exist.
 
    The following is a summary  of significant accounting policies  consistently
followed by the Funds in the preparation of their financial statements.
 
    PORTFOLIO  VALUATION:  Securities of the Funds are valued at amortized cost,
which approximates market  value. Amortized  cost valuation  involves valuing  a
security  at cost initially and, thereafter, assuming a constant amortization to
maturity of  any discount  or premium,  as  long as  the effect  of  fluctuating
interest rates on the market value of the instruments is not significant.
 
    REPURCHASE  AGREEMENTS:   Certain Funds  may engage  in repurchase agreement
transactions. The Fund values repurchase agreements at cost and accrues interest
into interest receivable. Under the terms  of a typical repurchase agreement,  a
Fund takes possession of the underlying debt obligation subject to an obligation
of  the  seller to  repurchase, and  the Fund  to resell,  the obligation  at an
agreed-upon price  and time,  thereby determining  the yield  during the  Fund's
holding  period. This arrangement results in a  fixed rate of return that is not
subject to market fluctuations  during the Fund's holding  period. The value  of
the  collateral, taken as a part of  the repurchase agreement, is at least equal
at all  times to  the  total amount  of  the repurchase  obligations,  including
interest.  In the event of  counterparty default, the Fund  has the right to use
the collateral to offset losses incurred. There is potential loss to the Fund in
the event the Fund is delayed or prevented from exercising its rights to dispose
of the collateral securities,  including the risk of  a possible decline in  the
value  of the underlying  securities during the  period while the  Fund seeks to
assert its rights. The Fund's  Investment Adviser, acting under the  supervision
of  the  Board  of  Trustees,  reviews  the  value  of  the  collateral  and the
creditworthiness of those  banks and  dealers with  which the  Funds enter  into
repurchase agreements to evaluate potential risks.
 
    SECURITIES  TRANSACTIONS AND INVESTMENT INCOME:  Securities transactions are
recorded as of the trade date. Realized gains and losses on investments sold are
recorded on the  basis of identified  cost. Interest income  is recorded on  the
accrual  basis. Investment income  and realized and  unrealized gains and losses
are allocated based upon the relative net assets of each class of shares.
 
    EXPENSES:  Operating expenses directly attributable to a class of shares are
charged  to  that  class'  operations.  Expenses  of  the  Funds  not   directly
attributable  to the operations  of any class  of shares are  prorated among the
classes to which the expense  relates based on the  relative net assets of  each
class of shares.
 
    FEDERAL  INCOME TAXES:  The Funds have  qualified and intend to qualify each
year as  regulated investment  companies  pursuant to  the requirements  of  the
Internal  Revenue Code of  1986, as amended.  The Funds distribute substantially
all of their taxable income to  their shareholders, therefore no Federal  income
tax provision is required.
 
                                       51
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)
 
    DIVIDENDS  AND DISTRIBUTIONS TO SHAREHOLDERS:  Dividends from net investment
income of each Fund are determined on  a class level and are declared daily  and
paid monthly. The Funds do not expect to realize any net long-term capital gains
and, therefore, do not contemplate payments of any capital gains dividends.
 
    Income  dividends and  capital gain  distributions are  determined at fiscal
year end in accordance with Federal income tax regulations which may differ from
generally accepted accounting principles. These differences are primarily due to
differing treatments of income and  gains on various investment securities  held
by  a Fund, timing  differences and differing  characterization of distributions
made by the Fund as a whole.
 
2. INVESTMENT ADVISORY FEE, ADMINISTRATION FEE AND OTHER RELATED PARTY
TRANSACTIONS
 
    Lehman Brothers  Global  Asset Management  Inc.  ("LBGAM"), serves  as  each
Fund's  Investment  Adviser  pursuant to  Investment  Advisory  Agreements dated
February 5, 1993. LBGAM is a wholly-owned subsidiary of Lehman Brothers Holdings
Inc. ("Holdings"). Under the Investment  Advisory Agreements, LBGAM is  entitled
to  receive a monthly fee at an annual rate of 0.10% of the value of each Fund's
average daily  net  assets.  For the  six  months  ended July  31,  1995,  LBGAM
voluntarily waived fees and reimbursed expenses as follows:
 
<TABLE>
<CAPTION>
                                                   FEES
                                                  WAIVED     EXPENSES REIMBURSED
                                                ----------   --------------------
<S>                                             <C>          <C>
Government Obligations Money Market Fund......  $ 26,946          --
Cash Management Fund..........................     1,199           $26,849
Treasury Instruments Money Market Fund II.....    18,480          --
100% Treasury Instruments Money Market Fund...    16,883            17,715
Tax-Free Money Market Fund....................    33,592          --
Municipal Money Market Fund...................    25,209          --
</TABLE>
 
    The  Shareholder Services Group, Inc. ("TSSG"), a wholly-owned subsidiary of
First Data  Corporation, serves  as  the Trust's  Administrator pursuant  to  an
Administration Agreement. Under the Administration Agreement TSSG is entitled to
receive  a monthly fee at the  annual rate of 0.10% of  the value of each Fund's
average daily net  assets. TSSG also  serves as the  Trust's Transfer Agent  and
receives  additional fees for such  services. For the six  months ended July 31,
1995, TSSG waived fees payable to them as follows:
 
<TABLE>
<CAPTION>
                                                                    FEES WAIVED
                                                                    ------------
<S>                                                                 <C>
Prime Money Market Fund...........................................  $1,534,923
Prime Value Money Market Fund.....................................   1,055,000
Government Obligations Money Market Fund..........................      26,144
Cash Management Fund..............................................         884
Treasury Instruments Money Market Fund II.........................     178,569
100% Treasury Instruments Money Market Fund.......................      12,585
Tax-Free Money Market Fund........................................      26,004
Municipal Money Market Fund.......................................      63,198
</TABLE>
 
    No officer  or employee  of Lehman  Brothers  Inc., LBGAM,  TSSG or  of  any
parent, subsidiary or affiliate thereof receives any compensation from the Trust
for  serving as an officer or Trustee of  the Trust. The Trust pays each Trustee
who is not an officer or employee of Lehman Brothers Inc., LBGAM or TSSG or  any
parent,  subsidiary  or affiliate  thereof $20,000  per  annum, plus  $1,250 per
meeting attended, and reimburses each such Trustee for travel and  out-of-pocket
expenses.
 
                                       52
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)
 
    Boston   Safe  Deposit  and  Trust  Company  ("Boston  Safe"),  an  indirect
wholly-owned subsidiary  of  Mellon  Bank  Corporation,  serves  as  the  Funds'
custodian.  For the six months  ended July 31, 1995,  Boston Safe waived fees as
follows:
 
<TABLE>
<CAPTION>
                                                                       FEES
                                                                      WAIVED
                                                                    ----------
<S>                                                                 <C>
Prime Money Market Fund...........................................  $171,040
Prime Value Money Market Fund.....................................   122,495
Government Obligations Money Market Fund..........................     9,640
Cash Management Fund..............................................       315
Treasury Instruments Money Market Fund II.........................    27,720
100% Treasury Instruments Money Market Fund.......................     5,215
Tax-Free Money Market Fund........................................     9,977
Municipal Money Market Fund.......................................    15,720
</TABLE>
 
3. SERVICES AGREEMENTS
 
    Lehman Brothers Inc. acts as Distributor of the Trust's shares.
 
    Pursuant to Rule 12b-1 under the  Investment Company Act of 1940, the  Funds
have  adopted either Service  Agreements or Service  and Distribution Agreements
("Service Agreements") with institutional investors  such as banks, savings  and
loan  associations  and other  financial institutions  ("Service Organizations")
which may  purchase Class  B, Class  C and  Class E  shares. Under  the  Service
Agreements each Fund compensates service organizations for servicing shareholder
accounts and covers expenses incurred in distributing Class B, Class C and Class
E  shares on behalf  of their clients.  Service Agreement fees  are paid by each
Fund based on the value of the average daily net assets of each respective class
of shares at the annual  rates as follows: 0.15% for  the Class E shares;  0.25%
for the Class B shares; and 0.35% for the Class C shares.
 
4. SHARES OF BENEFICIAL INTEREST
 
    The  Trustees have authority to issue an unlimited number of $.001 par value
shares of beneficial interest currently divided into four classes for each Fund.
Since the Funds have  sold shares, issued shares  as reinvestments of  dividends
and  redeemed shares only at a constant net  asset value of $1.00 per share, the
number of shares represented by such sales, reinvestments and redemptions is the
same as the amounts shown below for such transactions.
 
    The Tables below summarize transactions of  each class of shares, at  $1.00,
for the Funds noted:
<TABLE>
<CAPTION>
                                                        SIX MONTHS ENDED
PRIME MONEY MARKET FUND:                                     7/31/95
<S>                             <C>                <C>               <C>             <C>
                                -----------------------------------------------------------------
 
<CAPTION>
                                    CLASS A           CLASS B          CLASS C         CLASS E
                                ---------------    --------------    ------------    ------------
<S>                             <C>                <C>               <C>             <C>
Sold........................     50,414,002,639     1,210,300,879      31,669,381     265,684,929
Dividend Reinvestment.......         42,787,619            92,860          39,412         302,665
Redeemed....................    (47,686,981,839)   (1,236,749,142)    (25,472,912)   (269,733,202)
                                ---------------    --------------    ------------    ------------
Net increase/(decrease).....      2,769,808,419       (26,355,403)      6,235,881      (3,745,608)
                                ---------------    --------------    ------------    ------------
                                ---------------    --------------    ------------    ------------
<CAPTION>
                                                           YEAR ENDED
                                                             1/31/95
                                -----------------------------------------------------------------
                                    CLASS A           CLASS B          CLASS C         CLASS E
                                ---------------    --------------    ------------    ------------
<S>                             <C>                <C>               <C>             <C>
Sold........................     50,834,385,668     1,726,597,698     294,282,614     195,210,550
Dividend Reinvestment.......         33,594,264            40,466          11,099         197,277
Redeemed....................    (52,195,513,578)   (1,734,629,736)   (287,048,923)   (187,089,928)
                                ---------------    --------------    ------------    ------------
Net increase/(decrease).....     (1,327,533,646)       (7,991,572)      7,244,790       8,317,899
                                ---------------    --------------    ------------    ------------
                                ---------------    --------------    ------------    ------------
</TABLE>
 
                                       53
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)
<TABLE>
<CAPTION>
PRIME VALUE MONEY MARKET                SIX MONTHS ENDED
 FUND:                                       7/31/95
                                ---------------------------------
                                    CLASS A           CLASS B
                                ---------------    --------------
<S>                             <C>                <C>               <C>             <C>
Sold........................     22,720,972,616       136,337,039
Dividend Reinvestment.......         26,880,286          --
Redeemed....................    (20,758,050,649)     (133,561,817)
                                ---------------    --------------
Net increase................      1,989,802,253         2,775,222
                                ---------------    --------------
                                ---------------    --------------
<CAPTION>
                                                           YEAR ENDED
                                                             1/31/95
                                -----------------------------------------------------------------
                                    CLASS A           CLASS B          CLASS D         CLASS E
                                ---------------    --------------    ------------    ------------
<S>                             <C>                <C>               <C>             <C>
Sold........................     35,347,664,625       122,964,083         --                  100
Dividend Reinvestment.......         23,701,484          --                    23         --
Redeemed....................    (37,881,911,178)     (118,724,748)        (10,146)        --
                                ---------------    --------------    ------------    ------------
Net increase/(decrease).....     (2,510,545,069)        4,239,335         (10,123)            100
                                ---------------    --------------    ------------    ------------
                                ---------------    --------------    ------------    ------------
<CAPTION>
 
GOVERNMENT OBLIGATIONS MONEY                    SIX MONTHS ENDED
 MARKET FUND:                                        7/31/95
                                -------------------------------------------------
                                    CLASS A           CLASS B          CLASS C*
                                ---------------    --------------    ------------
<S>                             <C>                <C>               <C>             <C>
Sold........................        528,675,262        35,543,737       1,969,736
Dividend Reinvestment.......            192,529            10,395              11
Redeemed....................       (484,008,850)      (31,587,870)     (1,361,027)
                                ---------------    --------------    ------------
Net increase................         44,858,941         3,966,262         608,720
                                ---------------    --------------    ------------
                                ---------------    --------------    ------------
<CAPTION>
                                                           YEAR ENDED
                                                             1/31/95
                                -----------------------------------------------------------------
                                    CLASS A           CLASS B          CLASS D         CLASS E
                                ---------------    --------------    ------------    ------------
<S>                             <C>                <C>               <C>             <C>
Sold........................      1,366,951,349        88,597,518         --                  100
Dividend Reinvestment.......            465,286            13,481         --              --
Redeemed....................     (1,448,866,123)      (79,287,821)           (100)        --
                                ---------------    --------------    ------------    ------------
Net increase/(decrease).....        (81,449,488)        9,323,178            (100)            100
                                ---------------    --------------    ------------    ------------
                                ---------------    --------------    ------------    ------------
</TABLE>
 
                                       54
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)
<TABLE>
<CAPTION>
                                        SIX MONTHS ENDED
CASH MANAGEMENT FUND:                        7/31/95
                                ---------------------------------
                                    CLASS A           CLASS C
                                ---------------    --------------
<S>                             <C>                <C>               <C>             <C>
Sold........................        156,211,666          --
Dividend Reinvestment.......                658                 3
Redeemed....................       (159,821,309)         (200,000)
                                ---------------    --------------
Net decrease................         (3,608,985)         (199,997)
                                ---------------    --------------
                                ---------------    --------------
<CAPTION>
                                                           YEAR ENDED
                                                             1/31/95
                                -----------------------------------------------------------------
                                    CLASS A           CLASS B          CLASS C         CLASS E
                                ---------------    --------------    ------------    ------------
<S>                             <C>                <C>               <C>             <C>
Sold........................        101,753,182         3,814,865         200,000             100
Dividend Reinvestment.......              1,426          --                     7         --
Redeemed....................       (138,723,878)       (3,814,865)        --              --
                                ---------------    --------------    ------------    ------------
Net increase/(decrease).....        (36,969,270)         --               200,007             100
                                ---------------    --------------    ------------    ------------
                                ---------------    --------------    ------------    ------------
<CAPTION>
 
TREASURY INSTRUMENTS MONEY              SIX MONTHS ENDED
 MARKET FUND II:                             7/31/95
                                ---------------------------------
                                    CLASS A           CLASS B
                                ---------------    --------------
<S>                             <C>                <C>               <C>             <C>
Sold........................      2,160,083,394        40,980,722
Dividend Reinvestment.......          3,532,472           955,679
Redeemed....................     (2,109,295,623)      (30,767,268)
                                ---------------    --------------
Net increase................         54,320,243        11,169,133
                                ---------------    --------------
                                ---------------    --------------
<CAPTION>
                                                   YEAR ENDED
                                                     1/31/95
                                -------------------------------------------------
                                    CLASS A           CLASS B          CLASS E
                                ---------------    --------------    ------------
<S>                             <C>                <C>               <C>             <C>
Sold........................      3,209,159,843       138,750,163             100
Dividend Reinvestment.......          2,955,287           994,570         --
Redeemed....................     (3,000,100,464)     (146,364,683)        --
                                ---------------    --------------    ------------
Net increase/(decrease).....        212,014,666        (6,619,950)            100
                                ---------------    --------------    ------------
                                ---------------    --------------    ------------
<CAPTION>
 
                                  SIX MONTHS
100% TREASURY INSTRUMENTS            ENDED                   YEAR ENDED
 MONEY MARKET FUND:                 7/31/95                   1/31/95
                                ---------------    ------------------------------
                                    CLASS A           CLASS A          CLASS E
                                ---------------    --------------    ------------
<S>                             <C>                <C>               <C>             <C>
Sold........................        116,923,941       302,935,830             100
Dividend Reinvestment.......             62,227            70,170         --
Redeemed....................       (179,431,506)     (351,656,249)        --
                                ---------------    --------------    ------------
Net increase/(decrease).....        (62,445,338)      (48,650,249)            100
                                ---------------    --------------    ------------
                                ---------------    --------------    ------------
</TABLE>
 
                                       55
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)
<TABLE>
<CAPTION>
                                  SIX MONTHS
                                     ENDED                           YEAR ENDED
TAX-FREE MONEY MARKET FUND:         7/31/95                           1/31/95
                                ---------------    ----------------------------------------------
                                    CLASS A           CLASS A          CLASS B         CLASS E
                                ---------------    --------------    ------------    ------------
<S>                             <C>                <C>               <C>             <C>
Sold........................        351,554,596       685,428,863       1,072,223             100
Dividend Reinvestment.......            206,346           232,374             272         --
Redeemed....................       (333,130,579)     (685,042,968)     (1,072,495)        --
                                ---------------    --------------    ------------    ------------
Net increase................         18,630,363           618,269         --                  100
                                ---------------    --------------    ------------    ------------
                                ---------------    --------------    ------------    ------------
<CAPTION>
 
                                        SIX MONTHS ENDED
MUNICIPAL MONEY MARKET FUND:                 7/31/95
                                ---------------------------------
                                    CLASS A           CLASS C*
                                ---------------    --------------
<S>                             <C>                <C>               <C>             <C>
Sold........................      1,437,825,577         4,514,417
Dividend Reinvestment.......            958,373                 7
Redeemed....................     (1,304,076,001)       (2,280,742)
                                ---------------    --------------
Net increase................        134,707,949         2,233,682
                                ---------------    --------------
                                ---------------    --------------
<CAPTION>
                                                   YEAR ENDED
                                                     1/31/95
                                -------------------------------------------------
                                    CLASS A           CLASS D          CLASS E
                                ---------------    --------------    ------------
<S>                             <C>                <C>               <C>             <C>
Sold........................      4,299,613,976          --                   100
Dividend Reinvestment.......          1,655,845          --               --
Redeemed....................     (4,558,624,785)             (100)        --
                                ---------------    --------------    ------------
Net increase/(decrease).....       (257,354,964)             (100)            100
                                ---------------    --------------    ------------
                                ---------------    --------------    ------------
<FN>
- ------------------------
* The Class C shares of the Government Obligations Money Market Fund and the
  Municipal Money Market Fund commenced operations on April 18, 1995 and April
  14, 1995, respectively.
</TABLE>
 
    As  of July  31, 1995, the  Cash Management Fund,  100% Treasury Instruments
Money Market Fund, Tax-Free  Money Market Fund and  Municipal Money Market  Fund
had each issued 100 Class B shares in the amount of $100 to Lehman Brothers Inc.
As  of July 31,  1995, the Prime  Value Money Market  Fund, Treasury Instruments
Money Market  Fund II,  100%  Treasury Instruments  Money  Market Fund  and  the
Tax-Free  Money Market Fund had each issued 100  Class C shares in the amount of
$100 to Lehman Brothers Inc. As of  July 31, 1995, the Prime Value Money  Market
Fund,  Government Obligations Money Market  Fund, Cash Management Fund, Treasury
Instruments Money Market Fund II,  100% Treasury Instruments Money Market  Fund,
Tax-Free  Money Market Fund and Municipal Money  Market Fund had each issued 100
Class E shares  in the amount  of $100 to  Lehman Brothers Inc.  During the  six
months  ended July 31,  1995, no income  or expenses were  allocated to Class B,
Class C and Class E shares that  did not have capital stock activity during  the
six month period.
 
5. ORGANIZATION COSTS
 
    The  Funds bear  all costs in  connection with  their organization including
fees and expenses of  registering and qualifying  their shares for  distribution
under  Federal  and  state  securities regulations.  All  such  costs  are being
amortized on  the straight-line  method over  a period  of five  years from  the
commencement  of operations of each  Fund. In the event  that any of the initial
shares of a Fund are redeemed during such amortization period, the Fund will  be
reimbursed  for any unamortized organization costs in the same proportion as the
number of shares redeemed bears to the number of initial shares held at the time
of redemption.
 
                                       56
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)
 
6. CAPITAL LOSS CARRYFORWARD
 
    At January 31, 1995,  the following Funds had  available for Federal  income
tax purposes unused capital losses as follows:
 
<TABLE>
<CAPTION>
                                                             EXPIRING   EXPIRING
 NAME OF FUND                                                IN 2002    IN 2003
 ----------------------------------------------------------  --------   --------
 <S>                                                         <C>        <C>
 Prime Money Market Fund...................................    --       $18,342
 Prime Value Money Market Fund.............................    --       307,319
 Government Obligations Money Market Fund..................    --         4,414
 Treasury Instruments Money Market Fund II.................     $10       --
 Tax Free Money Market Fund................................    --         2,318
 Municipal Money Market Fund...............................    --        20,531
</TABLE>
 
7. SUBSEQUENT EVENTS
 
    On  August 9, 1995, the Board of Trustees  of the Trust voted to close Class
B, Class C and Class E shares of  the Cash Management Fund. On August 25,  1995,
the  Board  of Trustees  of the  Trust  authorized the  termination of  the 100%
Treasury Instruments Money Market Fund.
 
                                       57
<PAGE>
                      LEHMAN BROTHERS INSTITUTIONAL FUNDS
           ---------------------------------------------------------
 
<TABLE>
           <S>                                      <C>
           Client Service Center
            (8:30 am to 5 pm, Eastern time):             800-851-3134
                                                    fax: 617-261-4330
                                                      or 617-261-4340
 
           Dividend factors and yields:                  800-238-2560
 
           Administration/Sales/Marketing:               800-368-5556
 
           To place a purchase or redemption
            order:                                       800-851-3134
 
           To change account information:                800-851-3134
 
           Additional Prospectuses:                      800-368-5556
 
           Information on Service Agreements:            800-851-3134
 
           LEX Help Desk                                 800-566-5LEX
</TABLE>
 
                                LEHMAN BROTHERS
           ---------------------------------------------------------
<PAGE>
                LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
                            PRIME MONEY MARKET FUND
                         PRIME VALUE MONEY MARKET FUND
 
                    GOVERNMENT OBLIGATIONS MONEY MARKET FUND
                              CASH MANAGEMENT FUND
                   TREASURY INSTRUMENTS MONEY MARKET FUND II
                  100% TREASURY INSTRUMENTS MONEY MARKET FUND
                           TAX-FREE MONEY MARKET FUND
                          MUNICIPAL MONEY MARKET FUND
 
This  report  is  for the  general  information  of the  shareholders  of Lehman
Brothers Institutional  Funds  Group  Trust.  Its use  in  connection  with  any
offering  of the Trust's shares is authorized only if accompanied or preceded by
the Trust's current prospectuses.
 
LBO-127J5



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