LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
N-30B-2, 1995-03-24
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<PAGE>
   ANNUAL REPORT
 
    -----------------------------------------------------------------------
 
                                                    JANUARY 31, 1995
 
                                LEHMAN  
                              INSTITUTIONAL FUNDS
                                  GROUP TRUST
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
President's Letter......................................................     1
Performance and Commentary..............................................     3
Portfolio of Investments:
  Prime Money Market Fund...............................................     5
  Prime Value Money Market Fund.........................................     7
  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...........................................    19
  Floating Rate U.S. Government Fund....................................    24
  Short Duration U.S. Government Fund...................................    25
Money Market Funds:
  Statements of Assets and Liabilities..................................    26
  Statements of Operations..............................................    30
  Statements of Changes in Net Assets...................................    32
Non-Money Market Funds:
  Statements of Assets and Liabilities..................................    36
  Statements of Operations..............................................    38
  Statements of Changes in Net Assets...................................    39
Financial Highlights:
  Prime Money Market Fund...............................................    40
  Prime Value Money Market Fund.........................................    41
  Government Obligations Money Market Fund..............................    42
  Cash Management Fund..................................................    43
  Treasury Instruments Money Market Fund II.............................    44
  100% Treasury Instruments Money Market Fund...........................    45
  Tax-Free Money Market Fund............................................    46
  Municipal Money Market Fund...........................................    47
  Floating Rate U.S. Government Fund....................................    48
  Short Duration U.S. Government Fund...................................    49
Notes to Financial Statements...........................................    50
Report of Independent Auditors..........................................    59
Tax Information.........................................................    60
</TABLE>
<PAGE>
Dear Shareholders:
 
    We  are  pleased  to  present  the Annual  Report  for  the  Lehman Brothers
Institutional Funds Group Trust  (the "Trust") for the  year ending January  31,
1995.  This Report includes the portfolio holdings  for each of the Money Market
and Non-Money Market Funds that are currently offered by the Trust, namely:
 
                               MONEY MARKET FUNDS
 
<TABLE>
<S>                                           <C>
- PRIME MONEY MARKET FUNDS                    - TAX-EXEMPT MONEY MARKET FUNDS
 Prime Money Market Fund                      Tax-Free Money Market Fund
 Prime Value Money Market Fund                Municipal Money Market Fund
 
- GOVERNMENT MONEY MARKET FUNDS
 Government Obligations Money Market Fund
 Cash Management Fund
 Treasury Instruments Money Market Fund II
 100% Treasury Instruments Money Market Fund
</TABLE>
 
                             NON-MONEY MARKET FUNDS
 
                          - GOVERNMENT FIXED INCOME FUNDS
      Floating Rate U.S. Government Fund
                              Short Duration U.S. Government Fund
 
THE ECONOMY
 
    Since our last report, the pace of economic growth accelerated, reaching  an
estimated  4.50% in the fourth quarter as measured by the Gross Domestic Product
("GDP"). The economy's  strength was  all the more  impressive in  light of  the
series of interest rate hikes implemented by the Federal Reserve Board ("Federal
Reserve")  -- measures  that were  intended to  slow the  economy by  the fourth
quarter.  Although  the  economic  strength  was  achieved  with  only   minimal
inflationary  pressure, the Federal Reserve  tightened twice more, raising rates
an additional  125 basis  points  in order  to temper  the  pace of  growth  and
inflationary pressures.
 
    Toward  the end  of 1994,  certain sectors  began to  exhibit some weakness,
which had many analysts wondering if this was a false signal or the beginning of
the "soft landing" for this cycle. As  the growth rate for the GDP  decelerates,
it  is important to determine whether the  new rate is substantially higher than
the  2.50%  rate  at  which  the  Federal  Reserve  believes  the  expansion  is
sustainable  without  igniting  inflationary  pressures.  If  the  soft  landing
scenario occurs, we  believe fixed income  investors may be  facing their  first
good  buying opportunity in a year after  enduring an unfavorable bond market in
1994. Short  term investors  have a  more difficult  call to  make in  terms  of
predicting  the magnitude  and timing  of additional  Federal Reserve tightening
actions that may occur at the late  stages of the cycle and which are  necessary
to preserve its credibility as an inflation fighter.
 
    As  of  the date  of this  report, we  expect the  Federal Reserve  to raise
overnight rates by 50 basis points one more time in the second quarter of  1995,
and  we expect the interest rate curve to flatten as longer maturities remain in
a range of 7.50% to 8.00%.
 
THE MONEY MARKET FUNDS
 
    Throughout the period, the  TAXABLE MONEY MARKET  FUNDS were protected  from
rising  rates by  adopting a very  defensive short average  maturity. In January
1995, however, maturities were significantly
extended in order to lock in six- to 12-month rates which were beginning to fall
as evidence of economic weakness became more prevalent.
 
    The municipal market  was influenced  more by  technical conditions.  Rising
demand  for a  shrinking supply  of tax  exempt securities  helped stabilize the
value of securities in  spite of rising taxable  interest rates. The  TAX-EXEMPT
MONEY MARKET FUNDS were, therefore, well served by a strategy that minimized the
expensive short end of the curve in favor of longer-dated notes.
 
                                       1
<PAGE>
THE NON-MONEY MARKET FUNDS
 
    The  mortgage funds were  positioned defensively in  anticipation of further
Federal Reserve tightenings during the period.  On average the duration of  both
the  FLOATING RATE U.S.  GOVERNMENT FUND and the  SHORT DURATION U.S. GOVERNMENT
FUND was 0.5 years for the fiscal  year (similar to the duration of a  six-month
U.S.  Treasury bill). We intend to move the durations out to the target duration
of approximately one year when we  believe the Federal Reserve is finished  with
its tightening moves.
 
    The mortgage market performed well relative to other fixed-income sectors as
the supply of new mortgages declined substantially during the period. Supply was
affected by the rapid decline of prepayments and new mortgage originations which
occurred as interest rates have risen.
 
                                   *  *  *  *
 
    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
investment needs.
 
<TABLE>
<S>                        <C>                         <C>
Sincerely,
 
Andrew D. Gordon           Kirk D. Hartman
President                  Executive Vice President
                           and
                           Investment Officer
</TABLE>
 
                                TAX INFORMATION
 
  YEAR ENDED JANUARY 31, 1995 (UNAUDITED)
 
      Of  the dividends paid from net investment income for the Tax-Free Money
  Market Fund and  the Municipal Money  Market Fund for  the year January  31,
  1995, 100% is tax exempt for regular Federal income tax purposes.
 
                                       2
<PAGE>
PERFORMANCE DISCUSSION AND ANALYSIS --NON-MONEY MARKET FUNDS
 
    The  objective of the Non-Money  Market Funds is to  provide a high level of
current income consistent with minimal fluctuation of net asset value. The SHORT
DURATION U.S.  GOVERNMENT  FUND  pursues  its objective  by  investing  in  U.S.
government  and agency  securities, primarily  mortgage-backed securities. Also,
the Fund intends to invest only  in securities that have short durations,  i.e.,
the  price sensitivity  of the  Fund approximates  that of  U.S. Treasuries with
three-month to  two-year maturities.  In  the case  of  the FLOATING  RATE  U.S.
GOVERNMENT  FUND, the Fund pursues its objective by investing in adjustable rate
("ARMs") or floating  rate ("Floaters") U.S.  government and agency  securities,
primarily  mortgage-backed securities. Due to the  floating rate nature of these
securities, most  have  short durations  (i.e.,  less  than the  duration  of  a
two-year U.S. Treasury).
 
    Among  the major factors that affect performance of both Funds are the level
of interest rates and prepayment rates. If interest rates rise, the value of the
Funds will  decline. The  effect of  changes in  prepayment rates  on the  Funds
depends  on  the  purchase  price  of  the  individual  securities,  e.g., bonds
purchased  above  par  are   negatively  impacted  by  increasing   prepayments.
Additional factors affecting the SHORT DURATION U.S. GOVERNMENT FUND are spreads
in  the mortgage market and prepayment  rates. The FLOATING RATE U.S. GOVERNMENT
FUND is also impacted  by spreads in  the ARMs and  Floater mortgage market.  If
spreads  in either pertinent market  widen, the value of  the affected Fund will
decline.
 
    During 1994, the first year of operation for each Fund, yields on short-term
U.S. Treasuries  increased by  more than  2.00% as  the Federal  Reserve  raised
interest  rates seven times during the year. We attempted to mitigate the effect
of these interest rate increases  on the Funds by  keeping the duration of  each
Fund  below its  target duration.  While the  net asset  value of  each Fund did
decline during the year, we believe the performance would have been worse if the
Funds' duration had been longer.
 
    For the SHORT DURATION U.S. GOVERNMENT  FUND we monitor the spreads of  many
different  security types that the Fund can purchase. In general, the spreads at
year-end were near the levels at the beginning of the year. However, during  the
year there were incidents of spread-widening that detracted from the performance
of  the Fund but allowed us to purchase securities at more attractive prices. We
believe that spreads did not have a material effect on Fund performance.
 
    Prepayment rates  on mortgage  securities changed  significantly during  the
year as increasing interest rates virtually eliminated refinancings. Most of the
securities that were purchased by the SHORT DURATION U.S. GOVERNMENT FUND at the
beginning  of  the Fund's  operation were  purchased  above par.  Therefore, the
slowing of prepayments had a positive impact on the Fund.
 
    For the FLOATING RATE U.S. GOVERNMENT  FUND, we monitor the spreads of  many
different  ARMs and Floaters that can be purchased for the Fund. Spreads on ARMs
widened substantially during the year, while Floater spreads ended the year near
their levels at the  beginning of the  year. The majority of  the Fund has  been
invested  in  ARMs,  so  this  spread-widening  had  a  negative  impact  on the
performance of the Fund.
 
    Prepayment rates on ARMs were relatively stable as compared with  prepayment
of  fixed-rate mortgage  securities. Therefore,  prepayments did  not materially
affect the performance of the FLOATING RATE U.S. GOVERNMENT FUND.
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
                                                        LEHMAN
                                                       BROTHERS       LEHMAN
                                                      ADJUSTABLE   BROTHERS 1-3
              LEHMAN                                     RATE          YEAR
             FLOATING    LIPPER U.S.      LIPPER       MORTGAGE     GOVERNMENT
               RATE        MORTGAGE     ADJUSTABLE      INDEX       BOND INDEX
<S>        <C>           <C>           <C>           <C>           <C>
3/28/94           10000         10000         10000         10000         10000
6/30/94           10060          9948          9948          9944         10000
9/30/94           10142          9960          9960         10031         10100
1/31/95           10296         10222          9820         10289         10237
</TABLE>
 
                                       3
<PAGE>
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
                            LEHMAN
           LIPPER SHORT  BROTHERS 1-3
               U.S.          YEAR
            GOVERNMENT    GOVERNMENT      LEHMAN
           FUND AVERAGE   BOND INDEX    SHORT-TERM
<S>        <C>           <C>           <C>
3/28/94           10000         10000         10000
Jun-94             9920         10000         10066
Sep-94             9977         10100         10192
Jan-95            10090         10237         10354
</TABLE>
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
                                          LEHMAN
                                       BROTHERS 1-3
                                           YEAR
              LEHMAN                    GOVERNMENT
            SHORT-TERM   LIPPER SHORT   BOND INDEX
<S>        <C>           <C>           <C>
6/29/94           10000         10000         10000
Jun-94            10001         10000         10000
Sep-94            10128         10058         10100
Dec-94            10232         10047         10100
Jan-95            10272         10171         10237
</TABLE>
 
The graphs above  show the  results of a  hypothetical $10,000  invested in  the
Floating  Rate U.S. Government Fund (Premier Shares) and the Short Duration U.S.
Government Fund (Premier  and Select Shares)  from the inception  of the  Funds,
compared to a theoretical investment of $10,000 in the respective Index over the
same  period. (Index results are calculated beginning the first day of the month
following the commencement of the Funds' operations.) The results for the  Funds
reflect  the waiver of a portion of fees by the Adviser and Administrator of the
Funds for the period indicated.
 
The Lehman Brothers 1-3 Year Government Index is an index composed of agency and
Treasury securities with maturities of one  to three years. The Lehman  Brothers
Adjustable  Rate Mortgage  Index is an  index composed of  all agency guaranteed
securities with  coupons that  periodically  adjust based  on  a spread  over  a
published index.
 
The   Lipper  U.S.  Mortgage  Fund  Average   is  derived  from  a  universe  of
approximately  57  mutual  funds  that  invest   at  least  65%  of  assets   in
mortgages/securities  issued or guaranteed  as to principal  and interest by the
U.S. government  and  certain  federal  agencies.  The  Lipper  Adjustable  Rate
Mortgage  Fund Average  is derived from  a universe of  approximately 81 mutual
funds that invest at least 65% of assets in adjustable rate mortgage  securities
or  other securities collateralized by or representing an interest in mortgages.
The Lipper Short  U.S. Government  Fund Average is  derived from  a universe  of
approximately  125 mutual funds that invest at least 65% of assets in securities
issued or guaranteed by the  U.S. government, its agencies or  instrumentalities
with dollar-weighted average maturities of 5 years or less.
 
NOTE:  The performance shown represents past  performance and is not a guarantee
of future results.  A portfolio's share  price and investment  return will  vary
with  market conditions, and  the value of  shares, when redeemed,  may be worth
more or less than the original cost.
 
+ Assumes the reinvestment of all dividends and distributions.
 
                                       4
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JANUARY 31, 1995
 
                            PRIME MONEY MARKET FUND
 
<TABLE>
<CAPTION>
    FACE                                                           INTEREST      MATURITY         VALUE
   VALUE                                                             RATE+         DATE          (NOTE 1)
------------                                                      -----------   -----------   --------------
<C>           <S>                                                 <C>           <C>           <C>
              COMMERCIAL PAPER -- 38.8%
$ 25,000,000  Cargill Financial Services Corporation............        6.360%    6/27/95     $   24,330,833
  24,630,000  Clipper Receivables Corporation...................        5.950     2/14/95         24,579,481
  30,000,000  CS First Boston Inc...............................        5.965      3/9/95         29,819,400
  45,000,000  CS First Boston Inc...............................        6.290     5/30/95         44,076,650
  10,000,000  CXC Inc...........................................        5.950      2/9/95          9,987,333
  38,035,000  Eiger Capital Corporation.........................        5.950     2/14/95         37,957,123
  50,000,000  Eiger Capital Corporation.........................        5.900     2/17/95         49,870,000
  21,200,000  Falcon Asset Securitization Corporation...........        5.900      2/8/95         21,176,627
  17,800,000  Ford Motor Credit Company.........................        5.900     2/21/95         17,741,952
  22,200,000  Ford Motor Credit Company.........................        6.300     3/27/95         21,998,535
  25,000,000  General Electric Capital Corporation..............        6.430      7/3/95         24,294,889
  75,000,000  Goldman Sachs Group, L.P..........................        6.430      7/5/95         72,858,438
  40,000,000  McKenna Triangle National Corporation.............        5.900     2/22/95         39,864,667
  20,000,000  McKenna Triangle National Corporation.............        5.900     2/28/95         19,912,700
  25,000,000  McKenna Triangle National Corporation.............        6.240     4/13/95         24,700,715
  11,326,000  Monte Rosa Capital Corporation....................        5.900     2/16/95         11,298,393
  56,870,000  Monte Rosa Capital Corporation....................        5.900     2/21/95         56,685,804
  30,000,000  Monte Rosa Capital Corporation....................        5.900     2/22/95         29,897,625
  50,000,000  New Center Asset Trust............................        6.030     3/29/95         49,519,333
  48,000,000  Riverwoods Funding Corporation....................        5.800      2/1/95         48,000,000
  30,231,000  Seven Hills Funding Corporation...................        5.800     2/15/95         30,163,988
  20,000,000  Toyota Motor Credit Corporation...................        6.430     9/22/95         19,123,661
  30,000,000  Toyota Motor Credit Corporation...................        6.430     10/3/95         28,607,167
                                                                                              --------------
              TOTAL COMMERCIAL PAPER (COST $736,465,314)...................................      736,465,314
                                                                                              --------------
              BANK/CORPORATE NOTES -- 15.8%
  50,000,000  Bear Stearns Companies Inc., Variable Rate........        6.988    12/29/95         50,000,000
  50,000,000  Beta Finance Inc., Variable Rate..................        5.888    11/22/95         49,976,057
  50,000,000  C.I.T. Group Holdings Inc., Variable Rate.........        5.950     1/12/96         49,985,822
  50,000,000  FCC National Bank, Delaware, Variable Rate........        5.950     1/17/96         49,986,096
  40,000,000  Merrill Lynch & Company Inc., Variable Rate.......        6.075      9/8/95         40,000,000
  25,000,000  PHH Corporation, Inc., Variable Rate..............        5.950     1/19/96         24,993,129
  35,000,000  SMM Trust 1994-D, Variable Rate**.................        6.363    10/27/95         35,000,000
                                                                                              --------------
              TOTAL BANK/CORPORATE NOTES (COST $299,941,104)...............................      299,941,104
                                                                                              --------------
              U.S. GOVERNMENT AGENCY NOTES -- 5.3%
  45,000,000  Federal National Mortgage Association, Variable
               Rate.............................................        5.900    12/20/95         45,000,000
  40,000,000  Federal National Mortgage Association,
               Variable Rate....................................        6.100     10/7/96++       40,000,000
  15,350,000  Tennessee Valley Authority........................        3.995     7/20/95         15,150,418
                                                                                              --------------
              TOTAL U.S. GOVERNMENT AGENCY NOTES (COST $100,150,418).......................      100,150,418
                                                                                              --------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       5
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JANUARY 31, 1995
 
                            PRIME MONEY MARKET FUND
<TABLE>
<CAPTION>
    FACE                                                           INTEREST      MATURITY         VALUE
   VALUE                                                             RATE          DATE          (NOTE 1)
------------                                                      -----------   -----------   --------------
<C>           <S>                                                 <C>           <C>           <C>
              CERTIFICATES OF DEPOSIT -- 4.1%
$ 50,000,000  NBD Bank N.A......................................        5.840%    2/16/95     $   50,000,207
  28,000,000  NBD Bank N.A......................................        5.850     2/21/95         28,000,140
                                                                                              --------------
              TOTAL CERTIFICATES OF DEPOSIT (COST $78,000,347).............................       78,000,347
                                                                                              --------------
              TIME DEPOSIT -- 2.7% (COST $50,000,000)
  50,000,000  Trust Company Bank, Atlanta.......................        5.875      2/1/95         50,000,000
                                                                                              --------------
              TAXABLE MUNICIPAL -- 1.5% (COST $29,000,000)
  29,000,000  The City of New York, Series E, Variable Rate.....        6.240     3/13/95         29,000,000
                                                                                              --------------
              REPURCHASE AGREEMENTS -- 32.0%
              Agreement with Chase Securities Inc. dated 1/31/95 bearing 5.950% to be
               repurchased at $100,016,528 on 2/1/95, collateralized by $119,169,700 of
 100,000,000   various mortgage-backed securities, with various maturities and interest
               rates (market value -- $102,000,570)........................................      100,000,000
              Agreement with CS First Boston Corporation dated 1/31/95 bearing 5.950% to be
               repurchased at $106,451,591 on 2/1/95, collateralized by $127,545,000 of
 106,434,000   various mortgage-backed securities, with various maturities and interest
               rates (market value -- $109,818,721)........................................      106,434,000
              Agreement with UBS Securities, Inc. dated 1/31/95 bearing 5.950% to be
               repurchased at $400,066,111 on 2/1/95, collateralized by $492,288,326 of
 400,000,000   various mortgage-backed securities, with various maturities and interest
               rates (market value -- $408,002,757)........................................      400,000,000
                                                                                              --------------
              TOTAL REPURCHASE AGREEMENTS (COST $606,434,000)..............................      606,434,000
                                                                                              --------------
</TABLE>
 
<TABLE>
<S>                                                                               <C>       <C>
TOTAL INVESTMENTS (COST $1,899,991,183*).......................................    100.2%    1,899,991,183
OTHER ASSETS AND LIABILITIES (NET).............................................     (0.2)       (2,953,210)
                                                                                  ------    --------------
NET ASSETS.....................................................................    100.0%   $1,897,037,973
                                                                                  ------    --------------
                                                                                  ------    --------------
<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.
 + For Commercial Paper, the interest  rate represents annualized yield at  date
   of purchase (unaudited).
++ Variable rate, resets daily.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       6
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JANUARY 31, 1995
 
                         PRIME VALUE MONEY MARKET FUND
 
<TABLE>
<CAPTION>
    FACE                                                           INTEREST     MATURITY        VALUE
   VALUE                                                            RATE+         DATE         (NOTE 1)
------------                                                      ----------   ----------   --------------
<C>           <S>                                                 <C>          <C>          <C>
              COMMERCIAL PAPER -- 42.5%
$ 25,000,000  AGA Capital, Inc..................................       5.900%   2/21/95     $   24,918,055
  13,000,000  American Home Products Corporation................       5.830    2/10/95         12,981,053
  20,000,000  American Home Products Corporation................       6.750     7/5/95         19,422,500
  52,674,000  Atlantic Asset Securitization Corporation.........       5.680    2/14/95         52,565,960
  10,053,000  Atlantic Asset Securitization Corporation.........       5.850    2/21/95         10,020,328
  10,111,000  Atlantic Asset Securitization Corporation.........       5.900    2/21/95         10,077,858
  10,000,000  Calcot Limited....................................       5.970    2/10/95          9,985,075
  49,000,000  Ford Motor Credit Company.........................       5.850    2/24/95         48,816,862
  25,000,000  General Electric Capital Corporation..............       6.680     7/3/95         24,294,889
  40,000,000  General Motors Acceptance Corporation.............       5.500     2/1/95         40,000,000
  25,000,000  General Motors Acceptance Corporation.............       6.300    4/28/95         24,623,750
  40,000,000  Government Development Bank, Puerto Rico..........       5.850    2/22/95         39,863,500
  21,700,000  Internationale Nederlanden (U.S.) Funding
               Corporation......................................       6.600    6/21/95         21,143,033
  35,000,000  Nationwide Building Society.......................       5.870    2/24/95         34,868,740
  15,000,000  Nationwide Building Society.......................       5.880    2/27/95         14,936,300
  25,000,000  Nationwide Building Society.......................       6.000    3/13/95         24,833,334
  20,000,000  PaineWebber Group.................................       6.050    3/13/95         19,865,556
  40,000,000  Postipankki U.S. Inc..............................       5.880    2/17/95         39,895,467
  30,000,000  Postipankki U.S. Inc..............................       6.620     6/5/95         29,315,933
  30,000,000  Ruby Asset Funding Corporation....................       6.070    2/27/95         29,868,483
  30,000,000  Ruby Asset Funding Corporation....................       6.100    3/31/95         29,705,167
  43,305,000  SFC (USA) Inc.....................................       6.100    3/31/95         42,879,408
  30,000,000  Toronto-Dominion Holdings (USA), Inc..............       6.650    6/30/95         29,174,292
                                                                                            --------------
              TOTAL COMMERCIAL PAPER (COST $634,055,543).................................      634,055,543
                                                                                            --------------
              BANK/CORPORATE NOTES -- 14.7%
  30,000,000  Beta Finance Inc., Variable Rate..................       5.888   11/22/95         29,985,634
  50,000,000  CS First Boston, Inc., Variable Rate..............       6.363    1/26/96         50,000,000
  30,000,000  FCC National Bank, Delaware, Variable Rate........       5.950    1/17/96         29,991,657
  40,000,000  Merrill Lynch & Company Inc.,
               Variable Rate....................................       6.075     9/8/95         40,000,000
  50,000,000  PHH Corporation, Inc., Variable Rate..............       5.950    1/19/96         49,986,258
  20,000,000  SMM Trust 1994-D, Variable Rate**.................       6.363   10/27/95         20,000,000
                                                                                            --------------
              TOTAL BANK/CORPORATE NOTES (COST $219,963,549).............................      219,963,549
                                                                                            --------------
              CERTIFICATES OF DEPOSIT -- 6.7%
              YANKEE:
  30,000,000  Dai-Ichi Kangyo Bank, Ltd.........................       7.020     7/5/95         30,004,959
  25,000,000  Sumitomo Bank.....................................       5.890    2/17/95         24,999,891
  20,000,000  Sumitomo Bank.....................................       5.865    2/21/95         19,999,392
  25,000,000  Sumitomo Bank.....................................       6.060    3/13/95         25,000,825
                                                                                            --------------
              TOTAL CERTIFICATES OF DEPOSIT (COST $100,005,067)..........................      100,005,067
                                                                                            --------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       7
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JANUARY 31, 1995
 
                         PRIME VALUE MONEY MARKET FUND
<TABLE>
<CAPTION>
    FACE                                                           INTEREST     MATURITY        VALUE
   VALUE                                                             RATE         DATE         (NOTE 1)
------------                                                      ----------   ----------   --------------
<C>           <S>                                                 <C>          <C>          <C>
              TIME DEPOSIT -- 3.4% (COST $50,000,000)
$ 50,000,000  Trust Company Bank, Atlanta.......................       5.875%    2/1/95     $   50,000,000
                                                                                            --------------
              U.S. GOVERNMENT AGENCY NOTE -- 2.0% (COST $30,000,000)
  30,000,000  Federal National Mortgage Association, Variable
               Rate.............................................       6.100    10/7/96++       30,000,000
                                                                                            --------------
 
              REPURCHASE AGREEMENTS -- 30.8%
              Agreement with Chase Securities Inc. dated 1/31/95 bearing 5.950% to be
               repurchased at $139,022,974 on 2/1/95, collateralized by $169,528,958 of
 139,000,000   various mortgage-backed securities, with various maturities and interest
               rates (market value -- $141,782,058)......................................      139,000,000
              Agreement with CS First Boston Corporation dated 1/31/95 bearing
               5.950% to be repurchased at $220,354,414 on 2/1/95, collateralized by
 220,318,000   $313,145,263 of various mortgage-backed securities, with various
               maturities and interest rates (market value -- $228,957,060)..............      220,318,000
              Agreement with Greenwich Capital Markets dated 1/31/95 bearing
               5.950% to be repurchased at $100,016,528 on 2/1/95, collateralized by
 100,000,000   $124,665,530 of various mortgage-backed securities, with various
               maturities and interest rates (market value -- $102,039,180)..............      100,000,000
                                                                                            --------------
              TOTAL REPURCHASE AGREEMENTS (COST $459,318,000)............................      459,318,000
                                                                                            --------------
</TABLE>
 
<TABLE>
<S>                                                                           <C>         <C>
TOTAL INVESTMENTS (COST $1,493,342,159*)...................................     100.1%     1,493,342,159
OTHER ASSETS AND LIABILITIES (NET).........................................      (0.1)        (1,286,525)
                                                                              -------     --------------
NET ASSETS.................................................................   100.0  %    $1,492,055,634
                                                                              -------     --------------
                                                                              -------     --------------
<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.
 + For Commercial Paper, the interest  rate represents annualized yield at  date
   of purchase (unaudited).
++ Variable rate, resets daily.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       8
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JANUARY 31, 1995
 
                    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 -- 50.6%
             FEDERAL HOME LOAN BANK (FHLB):
$ 5,000,000  FHLB, Discount Note...............................       5.920%   2/28/95    $ 4,977,800
  5,000,000  FHLB, Variable Rate Note..........................       5.900    9/18/95      5,000,000
  5,000,000  FHLB, Variable Rate Note..........................       6.030     2/3/97+     5,000,000
                                                                                          -----------
                                                                                           14,977,800
                                                                                          -----------
             FEDERAL NATIONAL MORTGAGE ASSOCIATION (FNMA):
  5,000,000  FNMA, Variable Rate, Medium Term Note.............       5.900   12/20/95      5,000,000
  5,000,000  FNMA, Variable Rate, Medium Term Note.............       6.100    10/7/96+     5,000,000
                                                                                          -----------
                                                                                           10,000,000
                                                                                          -----------
             TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS
              (COST $24,977,800).......................................................    24,977,800
                                                                                          -----------
             REPURCHASE AGREEMENTS -- 49.5%
 12,200,000  Agreement with Chase Securities Inc. dated 1/31/95 bearing 5.950% to be
              repurchased at $12,202,016 on 2/1/95 collateralized by $13,577,890
              various mortgage-backed securities, with various maturities and interest
              rates (market value -- $12,447,370)......................................    12,200,000
 12,266,000  Agreement with CS First Boston Corporation dated 1/31/95 bearing 5.950% to
              be repurchased at $12,268,027 on 2/1/95 collateralized by $20,720,000
              various mortgage-backed securities, with various maturities and interest
              rates (market value -- $12,774,077)......................................    12,266,000
                                                                                          -----------
             TOTAL REPURCHASE AGREEMENTS (COST $24,466,000)............................    24,466,000
                                                                                          -----------
TOTAL INVESTMENTS (COST $49,443,800*)..................................  100.1%          49,443,800
OTHER ASSETS AND LIABILITIES (NET).....................................   (0.1)             (41,880)
                                                                         ------     ---------------
NET ASSETS.............................................................  100.0%     $    49,401,920
                                                                         ------     ---------------
                                                                         ------     ---------------
<FN>
------------------------
* Aggregate cost for Federal tax purposes.
+ Variable rate, resets daily.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       9
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JANUARY 31, 1995
 
                              CASH MANAGEMENT FUND
 
<TABLE>
<CAPTION>
   FACE                                                     INTEREST   MATURITY        VALUE
   VALUE                                                      RATE       DATE         (NOTE 1)
-----------                                                 --------   --------    --------------
<C>          <S>                                            <C>        <C>         <C>
             U.S. GOVERNMENT AGENCY OBLIGATION -- 20.2%
             (COST $1,000,000)
$ 1,000,000  Federal Home Loan Bank, Variable Rate Note...   6.030 %    2/3/97+    $    1,000,000
                                                                                   --------------
             REPURCHASE AGREEMENT -- 78.4% (COST $3,871,000)
  3,871,000  Agreement with Lehman Brothers Government Securities Inc. dated
              1/31/95 bearing 5.750% to be repurchased at $3,871,618 on 2/1/95
              collateralized by $4,140,000 U.S. Treasury Bill due 10/19/95
              (market value -- $3,950,471).....................................         3,871,000
                                                                                   --------------
</TABLE>
 
<TABLE>
<S>                                                                    <C>        <C>
TOTAL INVESTMENTS (COST $4,871,000*).................................    98.6%         4,871,000
OTHER ASSETS AND LIABILITIES (NET)...................................      1.4            69,417
                                                                       ------     --------------
NET ASSETS...........................................................  100.0%     $    4,940,417
                                                                       ------     --------------
                                                                       ------     --------------
<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
JANUARY 31, 1995
 
                   TREASURY INSTRUMENTS MONEY MARKET FUND II
 
<TABLE>
<CAPTION>
   FACE                                                      INTEREST    MATURITY     VALUE
   VALUE                                                      RATE+        DATE      (NOTE 1)
-----------                                                 ----------   --------  ------------
<C>          <S>                                            <C>          <C>       <C>
             U.S. TREASURY OBLIGATIONS -- 53.9%
$20,000,000  U.S. Treasury Bills..........................       5.085%    2/2/95  $ 19,997,175
 15,000,000  U.S. Treasury Bills..........................       5.055     2/9/95    14,983,150
 25,000,000  U.S. Treasury Bills..........................       5.360    2/16/95    24,944,166
 25,000,000  U.S. Treasury Bills..........................       5.510     3/2/95    24,889,035
 25,000,000  U.S. Treasury Bills..........................       5.750     3/9/95    24,856,250
 25,000,000  U.S. Treasury Bills..........................       5.410    3/23/95    24,812,153
 10,000,000  U.S. Treasury Bills..........................       5.420    4/13/95     9,893,106
 10,000,000  U.S. Treasury Bills..........................       5.620    4/13/95     9,889,161
  5,000,000  U.S. Treasury Bills..........................       5.460    4/20/95     4,940,850
 25,000,000  U.S. Treasury Bills..........................       5.695    4/20/95    24,691,521
 20,000,000  U.S. Treasury Bills..........................       5.740    4/27/95    19,728,944
 10,000,000  U.S. Treasury Bills..........................       5.880    5/18/95     9,826,867
                                                                                   ------------
             TOTAL U.S. TREASURY OBLIGATIONS (COST $213,452,378).................   213,452,378
                                                                                   ------------
             REPURCHASE AGREEMENTS -- 46.4%
             Agreement with Chase Securities Inc. dated 1/31/95 bearing 5.820% to
 60,000,000   be repurchased at $60,009,700 on 2/1/95, collateralized by
              $100,196,000 U.S. Treasury Obligations, with various maturities and
              interest rates
              (market value -- $61,202,922)......................................
                                                                                     60,000,000
 70,000,000  Agreement with Lehman Brothers Government Securities Inc. dated
              1/31/95 bearing 5.900% to be repurchased at $70,011,472 on 2/1/95,
              collateralized by $49,794,000 U.S. Treasury Bonds, with various
              maturities and interest rates (market value -- $71,347,591)........    70,000,000
             Agreement with Merrill Lynch Government Securities Inc. dated
 53,957,000   1/31/95 bearing 5.750% to be repurchased at $53,965,618 on 2/1/95,
              collateralized by $55,243,000 U.S. Treasury Bills, with various
              maturities
              (market value -- $55,039,388)......................................
                                                                                     53,957,000
                                                                                   ------------
             TOTAL REPURCHASE AGREEMENTS (COST $183,957,000).....................   183,957,000
                                                                                   ------------
</TABLE>
 
<TABLE>
<S>                                                                    <C>       <C>
TOTAL INVESTMENTS (COST $397,409,378*)...............................  100.3%       397,409,378
OTHER ASSETS AND LIABILITIES (NET)...................................   (0.3)        (1,371,134)
                                                                       -----     --------------
NET ASSETS...........................................................  100.0%    $  396,038,244
                                                                       -----     --------------
                                                                       -----     --------------
<FN>
------------------------
* Aggregate cost for Federal tax purposes.
+ For U.S. Treasury Obligations, the interest rate represents annualized yield
  at date of purchase (unaudited).
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       11
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JANUARY 31, 1995
 
                  100% TREASURY INSTRUMENTS MONEY MARKET FUND
 
<TABLE>
<CAPTION>
   FACE                                                      INTEREST    MATURITY     VALUE
   VALUE                                                      RATE+        DATE     (NOTE 1)
-----------                                                 ----------   --------  -----------
<C>          <S>                                            <C>          <C>       <C>
             U.S. TREASURY OBLIGATIONS -- 100.4%
$   290,000  U.S. Treasury Bills..........................       5.045%    2/2/95  $   289,959
     50,000  U.S. Treasury Bills..........................       5.080     2/2/95       49,993
    155,000  U.S. Treasury Bills..........................       5.250     2/2/95      154,977
    445,000  U.S. Treasury Bills..........................       5.310     2/2/95      444,934
  1,950,000  U.S. Treasury Bills..........................       5.085     2/9/95    1,947,797
  2,865,000  U.S. Treasury Bills..........................       5.120     2/9/95    2,861,740
    195,000  U.S. Treasury Bills..........................       5.230     2/9/95      194,774
    690,000  U.S. Treasury Bills..........................       5.280    2/16/95      688,482
    470,000  U.S. Treasury Bills..........................       5.335    2/16/95      468,955
  1,000,000  U.S. Treasury Bills..........................       5.360    2/16/95      997,767
  2,205,000  U.S. Treasury Bills..........................       5.320    2/23/95    2,197,831
  1,380,000  U.S. Treasury Bills..........................       5.530    2/23/95    1,375,336
    855,000  U.S. Treasury Bills..........................       5.615    2/23/95      852,066
  3,545,000  U.S. Treasury Bills..........................       5.610     3/2/95    3,528,980
  5,720,000  U.S. Treasury Bills..........................       5.365     3/9/95    5,689,312
  2,810,000  U.S. Treasury Bills..........................       5.450     3/9/95    2,794,685
    355,000  U.S. Treasury Bills..........................       5.540     3/9/95      353,033
    360,000  U.S. Treasury Bills..........................       5.640     3/9/95      357,970
  4,790,000  U.S. Treasury Bills..........................       5.520    3/16/95    4,758,418
  1,400,000  U.S. Treasury Bills..........................       5.520    3/23/95    1,389,267
  5,290,000  U.S. Treasury Bills..........................       5.390    3/30/95    5,244,854
  4,390,000  U.S. Treasury Bills..........................       5.500     4/6/95    4,347,076
  3,255,000  U.S. Treasury Bills..........................       5.760     4/6/95    3,221,669
  1,000,000  U.S. Treasury Bills..........................       5.440    4/13/95      989,271
  1,495,000  U.S. Treasury Bills..........................       5.615    4/13/95    1,478,445
  1,000,000  U.S. Treasury Bills..........................       5.620    4/13/95      988,916
  5,580,000  U.S. Treasury Bills..........................       5.640    4/13/95    5,517,932
  1,000,000  U.S. Treasury Bills..........................       5.460    4/20/95      988,170
 10,000,000  U.S. Treasury Bills..........................       5.695    4/20/95    9,876,608
  1,435,000  U.S. Treasury Bills..........................       5.720    4/20/95    1,417,216
  2,440,000  U.S. Treasury Bills..........................       5.730    4/20/95    2,409,708
  2,000,000  U.S. Treasury Bills..........................       5.740    4/27/95    1,972,894
  7,500,000  U.S. Treasury Bills..........................       5.840    4/27/95    7,396,584
  1,945,000  U.S. Treasury Bills..........................       5.790     5/4/95    1,916,221
                                                                                   -----------
</TABLE>
 
<TABLE>
<S>                                                                   <C>       <C>
TOTAL INVESTMENTS (COST $79,161,840*)..............................   100.4%        79,161,840
OTHER ASSETS AND LIABILITIES (NET).................................    (0.4)          (345,693)
                                                                      -----     --------------
NET ASSETS.........................................................   100.0%    $   78,816,147
                                                                      -----     --------------
                                                                      -----     --------------
<FN>
------------------------
* Aggregate cost for Federal tax purposes.
+ For U.S. Treasury Obligations, the interest rate represents annualized yield
  at date of purchase (unaudited).
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       12
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JANUARY 31, 1995
 
                           TAX-FREE MONEY MARKET FUND
 
<TABLE>
<CAPTION>
   FACE                                                        VALUE
   VALUE                                                     (NOTE 1)
-----------                                                 -----------
<C>          <S>                                            <C>
             MUNICIPAL BONDS AND NOTES -- 99.3%
             ARIZONA -- 1.0%
$   600,000  Pima County, Arizona, Industrial Revenue
              Authority, (Barclays Bank, LOC), 3.600% due
              12/1/22+++..................................  $   600,000
                                                            -----------
             ARKANSAS -- 0.8%
    500,000  Arkansas State, Development Finance
              Authority, (FGIC Insured),
              (Citibank, BPA),
              3.600% due 12/1/15+++.......................      500,000
                                                            -----------
             CALIFORNIA -- 3.6%
    460,000  California State, Revenue Anticipation Notes,
              Series A,
              5.000% due 6/28/95..........................      461,690
    500,000  Los Angeles County, California, Unified
              School District,
              4.500% due 7/10/95..........................      501,891
  1,000,000  Moreno Valley, California, Unified School
              District, Tax and Revenue Anticipation
              Notes,
              4.500% due 6/30/95..........................    1,001,908
    200,000  Santa Clara County, California, Hospital
              Facilities Authority Revenue,
              El Camino Hospital, (Natwest, LOC),
              3.350% due 8/1/15+++........................      200,000
                                                            -----------
                                                              2,165,489
                                                            -----------
             COLORADO -- 4.0%
  1,000,000  Arapahoe County, Colorado, Capital
              Improvement Highway Revenue, Series D,
              (Union Bank of Switzerland, LOC),
              3.850% due 8/31/26++........................    1,000,000
  1,000,000  Colorado State, Tax and Revenue Anticipation
              Notes,
              4.500% due 6/27/95..........................    1,001,666
    400,000  Denver, Colorado, City and County Revenue,
              Children's Hospital,
              (FGIC Insured), (Sakura, BPA),
              3.550% due 10/1/18+++.......................      400,000
                                                            -----------
                                                              2,401,666
                                                            -----------
             DISTRICT OF COLUMBIA -- 1.8%
  1,100,000  District of Columbia, Hospital Revenue,
              Series A, (Mitsubishi Bank, LOC), 3.800% due
              7/1/20+++...................................    1,100,000
                                                            -----------
             FLORIDA -- 5.1%
  2,600,000  Atlantic Beach, Florida, Refunding and
              Improvement, Fleet Landing, Series B,
              (Barnett Bank, LOC),
              4.250% due 10/1/24+.........................    2,600,000
    400,000  Jacksonville, Florida, Health Facilities
              Authority, (Sun Bank, BPA),
              4.200% due 6/1/08+..........................      400,000
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       13
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JANUARY 31, 1995
 
                           TAX-FREE MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                        VALUE
   VALUE                                                     (NOTE 1)
-----------                                                 -----------
<C>          <S>                                            <C>
             MUNICIPAL BONDS AND NOTES (CONTINUED)
             FLORIDA (CONTINUED)
$   100,000  Marion County, Florida, Industrial
              Development Authority Revenue,
              (Bankers Trust, LOC),
              3.450% due 7/1/04+++........................  $   100,000
                                                            -----------
                                                              3,100,000
                                                            -----------
             ILLINOIS -- 10.1%
  1,000,000  Chicago, Illinois, School Finance Authority
              Refunding, Pre-refunded 6/1/95, (FGIC
              Insured),
              8.700% due 6/1/15...........................    1,034,228
  1,000,000  Du Page County, Illinois, Water and Sewer
              Revenue, Pre-refunded 6/1/95, (MBIA
              Insured),
              9.600% due 12/1/98..........................    1,017,403
    500,000  Illinois Health Facilities Authority Revenue,
              Series A,
              Commercial Paper Put 2/23/95,
              3.800% due 8/1/15++.........................      500,000
  2,500,000  Illinois State, Certificates of
              Participation,
              4.750% due 6/15/95..........................    2,506,423
  1,000,000  Illinois State, Sales Tax Revenue, Series A,
              Pre-refunded 6/15/95,
              9.375% due 6/15/15..........................    1,042,869
                                                            -----------
                                                              6,100,923
                                                            -----------
             KENTUCKY -- 1.7%
  1,000,000  County of Graves, Kentucky, Revenue Bond,
              Series 1988,
              (Bank of New York, LOC),
              3.700% due 12/1/12+++.......................    1,000,000
                                                            -----------
             LOUISIANA -- 9.0%
  3,000,000  Ascension Parish, Louisiana, Pollution
              Control Revenue, (Shell Oil Company
              Project), (Shell Oil, GTC),
              3.750% due 9/1/23+..........................    3,000,000
  1,400,000  Louisiana Public Facilities Authority, Forest
              Hospital, (Bankers Trust, LOC),
              3.350% due 12/1/13+++.......................    1,400,000
  1,000,000  Orleans, Louisiana, Levee District,
              Pre-refunded 5/1/95, (MBIA Insured),
              8.600% due 11/1/96..........................    1,030,876
                                                            -----------
                                                              5,430,876
                                                            -----------
             MARYLAND -- 4.0%
    895,000  Maryland Environmental Services, (Shore
              Regional Landfill Project),
              (AMBAC Insured),
              5.200% due 9/1/95...........................      898,994
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       14
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JANUARY 31, 1995
 
                           TAX-FREE MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                        VALUE
   VALUE                                                     (NOTE 1)
-----------                                                 -----------
<C>          <S>                                            <C>
             MUNICIPAL BONDS AND NOTES (CONTINUED)
             MARYLAND (CONTINUED)
$ 1,500,000  Maryland State Health and Higher Education
              Facilities Authority, Series B, (Mellon
              Bank, LOC),
              3.750% due 7/1/24+++........................  $ 1,500,000
                                                            -----------
                                                              2,398,994
                                                            -----------
             MASSACHUSETTS -- 1.2%
    700,000  Massachusetts State Health and Educational
              Facilities Authority, Capital Asset Program,
              (Sanwa Bank, LOC),
              3.350% due 1/1/35+++........................      700,000
                                                            -----------
             MICHIGAN -- 4.8%
    200,000  Dearborn, Michigan, Economic Development
              Corporation,
              (Mellon Bank, LOC),
              3.700% due 3/1/25+++........................      200,000
  1,000,000  Detroit, Michigan, City School District,
              General Obligation,
              Tax and Revenue Anticipation Notes,
              5.000% due 5/1/95...........................    1,002,507
  1,700,000  Kent Hospital Finance Authority, Series A,
              (Sanwa Bank, LOC),
              3.450% due 1/15/20+++.......................    1,700,000
                                                            -----------
                                                              2,902,507
                                                            -----------
             MISSOURI -- 7.1%
  1,700,000  Joplin, Missouri, Industrial Development
              Authority,
              (Sumitomo Bank, LOC),
              3.750% due 12/1/05+++.......................    1,700,000
  1,000,000  Missouri Environmental Impact and Energy
              Resources, Pollution Control Revenue, (Swiss
              Bank, LOC),
              3.750% due 6/1/14++.........................    1,000,000
  1,000,000  Osage Beach, Missouri, Industrial Development
              Authority,
              (NationsBank, LOC),
              3.950% due 1/1/11++++.......................    1,000,000
    600,000  West Plains, Missouri, Industrial Development
              Authority,
              (Bank of Tokyo, LOC),
              3.950% due 11/1/10++++......................      600,000
                                                            -----------
                                                              4,300,000
                                                            -----------
             NEW JERSEY -- 1.3%
    555,000  Middlesex County, New Jersey, Utilities
              Authority, Sewer Revenue,
              (MBIA Insured), (Bankers Trust, BPA),
              3.750% due 8/15/02+++.......................      555,000
    200,000  New Jersey, Economic Development Authority,
              (Chemical Bank, LOC),
              3.550% due 2/1/02++++.......................      200,000
                                                            -----------
                                                                755,000
                                                            -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       15
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JANUARY 31, 1995
 
                           TAX-FREE MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                        VALUE
   VALUE                                                     (NOTE 1)
-----------                                                 -----------
<C>          <S>                                            <C>
             MUNICIPAL BONDS AND NOTES (CONTINUED)
             NEW MEXICO -- 1.2%
$   700,000  Eddy County, New Mexico, Pollution Control
              Revenue,
              (Rabobank Nederland, LOC),
              3.550% due 2/1/03+++........................  $   700,000
                                                            -----------
             NEW YORK -- 20.0%
  3,200,000  Monroe County, New York, Series 24-B,
              (Morgan Guaranty, BPA),
              4.250% due 6/1/05+++........................    3,200,000
  1,550,000  New York, New York, Municipal Water Finance
              Authority, Water and Sewer Systems Revenue,
              Pre-refunded 6/15/95,
              9.125% due 6/15/05..........................    1,607,405
  1,000,000  New York, New York, Revenue Anticipation
              Notes, Series B,
              4.750% due 6/30/95..........................    1,002,937
  2,000,000  New York, New York, Series B, Sub-Series B-5,
              (Rabobank Nederland, BPA),
              4.250% due 8/1/21+..........................    2,000,000
  1,000,000  New York State, Dormitory Authority Revenue,
              (Morgan Guaranty, BPA),
              4.250% due 7/1/10+++........................    1,000,000
  2,000,000  New York State, Local Government Assistance
              Corporation,
              (Bank of Nova Scotia, BPA),
              3.700% due 4/2/21+++........................    2,000,000
             Triborough Bridge and Tunnel Authority:
    180,000  Convention Center Project, Series D,
              Pre-refunded 7/1/95,
              8.875% due 1/1/05...........................      186,772
  1,095,000  Special Obligation,
              (MBIA Insured), (Bankers Trust, BPA),
              3.800% due 1/1/03+++........................    1,095,000
                                                            -----------
                                                             12,092,114
                                                            -----------
             OHIO -- 6.8%
    300,000  Cincinnati, Ohio, Student Loan Funding
              Corporation,
              (Fuji Bank, LOC),
              3.600% due 12/29/98+++......................      300,000
  3,800,000  Clermont County, Ohio, Mercy Health Systems,
              Series B,
              (Mercy Health Systems, GTC),
              3.650% due 9/1/21+++........................    3,800,000
                                                            -----------
                                                              4,100,000
                                                            -----------
             OREGON -- 1.3%
    800,000  Portland, Oregon, (Fuji Bank/Bank of Tokyo,
              LOC),
              3.875% due 12/1/14+++.......................      800,000
                                                            -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       16
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JANUARY 31, 1995
 
                           TAX-FREE MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                        VALUE
   VALUE                                                     (NOTE 1)
-----------                                                 -----------
<C>          <S>                                            <C>
             MUNICIPAL BONDS AND NOTES (CONTINUED)
             PENNSYLVANIA -- 3.3%
$ 1,500,000  Allegheny County, Pennsylvania, Hospital
              Development Authority,
              (Swiss Bank, BPA),
              3.400% due 9/1/95+++........................  $ 1,500,000
    500,000  Philadelphia, Pennsylvania, Tax and Revenue
              Anticipation Notes, Series E, (PNC Bank,
              N.A., LOC),
              4.750% due 6/15/95..........................      501,505
                                                            -----------
                                                              2,001,505
                                                            -----------
             SOUTH CAROLINA -- 3.3%
  2,000,000  York County, South Carolina, Pollution
              Control Revenue,
              (Cooperative Finance Corporation, GTC),
              3.500% due 8/15/14++........................    2,000,000
                                                            -----------
             TENNESSEE -- 2.8%
    700,000  Chattanooga, Tennessee, Industrial
              Development Revenue,
              (Credit Suisse, LOC),
              3.600% due 12/15/12+++......................      700,000
  1,000,000  Winchester, Tennessee, Industrial Development
              Revenue,
              (Industrial Bank of Japan, LOC),
              4.125% due 10/1/95+++.......................    1,000,000
                                                            -----------
                                                              1,700,000
                                                            -----------
             TEXAS -- 0.2%
    100,000  Lubbock, Texas, Health Facilities Authority
              Revenue,
              (St. Joseph's Hospital),
              3.800% due 7/1/13+..........................      100,000
                                                            -----------
             VIRGINIA -- 0.8%
    500,000  Virginia State, Public School Authority,
              (MBIA Insured),
              6.300% due 8/1/95...........................      505,292
                                                            -----------
             WISCONSIN -- 4.1%
  2,500,000  Milwaukee, Wisconsin, Industrial Development
              Revenue,
              (Pharmacia Ab, GTC),
              3.700% due 6/1/09+++........................    2,500,000
                                                            -----------
</TABLE>
 
<TABLE>
<S>                                                <C>      <C>
TOTAL INVESTMENTS (COST $59,954,366*)...........    99.3 %   59,954,366
OTHER ASSETS AND LIABILITIES (NET)..............     0.7        396,471
                                                   ------   -----------
NET ASSETS......................................   100.0 %  $60,350,837
                                                   ------   -----------
                                                   ------   -----------
<FN>
------------------------
   * Aggregate cost for Federal tax purposes.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       17
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JANUARY 31, 1995
 
                           TAX-FREE MONEY MARKET FUND
 
   + 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.
FGIC   -- Federal Guaranty Insurance Corporation.
GTC    -- Instruments guaranteed by corporation.
LOC    -- Instruments supported by bank letter of credit.
MBIA   -- Municipal Bond Investors Assurance.
 
NOTE:
Approximately  81.3% 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                            12.2%
              Aa, Aa2, Aa3                           AA                             5.8
              MIG1/VMIG1/P1                  A-1/A-1+/SP-1/SP-1+                   82.0
                                                                               --------
                                                                                  100.0%
                                                                               --------
                                                                               --------
              # Bonds are not necessarily rated the same by both services.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       18
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JANUARY 31, 1995
 
                          MUNICIPAL MONEY MARKET FUND
 
<TABLE>
<CAPTION>
   FACE                                                       VALUE
  VALUE                                                     (NOTE 1)
----------                                                 -----------
<C>         <S>                                            <C>
            MUNICIPAL BONDS AND NOTES -- 98.8%
            ARIZONA -- 2.1%
$2,000,000  Flagstaff, Arizona, Industrial Development
             Authority,
             (First Interstate Bank, LOC),
             3.750% due 2/1/24+++........................  $ 2,000,000
                                                           -----------
            CALIFORNIA -- 11.2%
 4,000,000  California State, Revenue Anticipation Notes,
             Series A,
             5.000% due 6/28/95..........................    4,014,853
 3,035,000  Los Angeles, California, General Obligation,
             Series A,
             4.750% due 9/1/95...........................    3,043,854
 1,600,000  Moreno Valley, California, Unified School
             District, Tax and Revenue
             Anticipation Notes,
             4.500% due 6/30/95..........................    1,603,052
 1,840,000  San Mateo County, California, School
             District, Tax and Revenue
             Anticipation Notes,
             4.500% due 6/30/95..........................    1,843,090
                                                           -----------
                                                            10,504,849
                                                           -----------
            COLORADO -- 4.3%
 4,000,000  Arapahoe County, Colorado, Capital
             Improvement Highway Revenue,
             Series D, (Union Bank of Switzerland, LOC),
             3.850% due 8/31/26++........................    4,000,000
                                                           -----------
            DISTRICT OF COLUMBIA -- 2.8%
 2,500,000  District of Columbia, FGIC, Pre-refunded
             6/1/95,
             9.375% due 6/1/05...........................    2,590,200
                                                           -----------
            FLORIDA -- 4.3%
   540,000  Dade County, Florida, Solid Waste Industrial
             Development Authority Revenue, Series A,
             (Banque Paribas, LOC),
             3.800% due 12/1/10+++.......................      540,000
 3,500,000  Jacksonville, Florida, Health Facilities
             Authority, (Barnett Bank, LOC),
             4.250% due 6/1/20+..........................    3,500,000
                                                           -----------
                                                             4,040,000
                                                           -----------
            HAWAII -- 5.4%
 5,000,000  Secondary Market Services Corporation, Hawaii
             Student Loan Purchase Revenue, Series I,
             4.550% due 9/1/10++.........................    5,000,000
                                                           -----------
            ILLINOIS -- 16.1%
 1,000,000  Illinois Development Finance Authority
             Revenue,
             (Industrial Bank of Japan, LOC),
             4.000% due 1/1/09+++........................    1,000,000
 2,000,000  Illinois Health Facilities Authority Revenue,
             Series A,
             Commercial Paper Put 2/23/95,
             3.800% due 8/1/15++.........................    2,000,000
 2,000,000  Illinois Housing Development Authority
             Revenue, Series A-2,
             4.100% due 8/1/26++.........................    1,998,749
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       19
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JANUARY 31, 1995
 
                          MUNICIPAL MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                       VALUE
  VALUE                                                     (NOTE 1)
----------                                                 -----------
<C>         <S>                                            <C>
            MUNICIPAL BONDS AND NOTES (CONTINUED)
            ILLINOIS (CONTINUED)
$4,000,000  Illinois State, Certificates of
             Participation,
             4.750% due 6/15/95..........................  $ 4,009,880
 1,000,000  Illinois State, Sales Tax Revenue, Series A,
             Pre-refunded 6/15/95,
             9.375% due 6/15/15..........................    1,042,874
 1,000,000  Lisle, Illinois, Multifamily Housing Revenue,
             (American National Bank, LOC),
             3.850% due 12/15/25+++......................    1,000,000
 3,000,000  St. Charles, Illinois, Industrial Development
             Revenue,
             (Aces-Pier 1 Project), (Natwest, LOC),
             3.550% due 12/15/26+++......................    3,000,000
 1,000,000  West Chicago, Illinois, Industrial
             Development Revenue,
             (Bank of Tokyo, LOC),
             2.975% due 5/1/99+++........................    1,000,000
                                                           -----------
                                                            15,051,503
                                                           -----------
            INDIANA -- 5.7%
            Indiana State Employment Development
             Commission Revenue,
             (Credit Commerciale, LOC):
   500,000  4.000% due 1/1/13+++.........................      500,000
 1,550,000  4.000% due 1/1/14+++.........................    1,550,000
 3,100,000  Indianapolis, Indiana, Industrial Economic
             Development Revenue,
             (Asahi Bank, LOC),
             4.625% due 9/1/95+++........................    3,100,000
   200,000  Ossian, Indiana, Industrial Economic
             Development Revenue,
             (Harris Trust, LOC),
             3.800% due 12/1/23+++.......................      200,000
                                                           -----------
                                                             5,350,000
                                                           -----------
            KENTUCKY -- 2.1%
 2,000,000  Kentucky Pollution Abatement and Water
             Resources, Finance Authority
             Revenue, (Bank of Tokyo/Sakura/Tokai, BPA),
             4.100% due 8/13/06+.........................    2,000,000
                                                           -----------
            LOUISIANA -- 3.0%
   100,000  East Baton Rouge Parish, Louisiana, Pollution
             Control Revenue,
             (Toronto Dominion, LOC),
             3.600% due 10/1/99+++.......................      100,000
            Louisiana Housing Finance Authority Revenue,
             (Sumitomo Trust, LOC):
 1,630,000  4.500% due 12/1/25+++........................    1,630,000
 1,100,000  4.500% due 1/1/26+++.........................    1,100,000
                                                           -----------
                                                             2,830,000
                                                           -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       20
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JANUARY 31, 1995
 
                          MUNICIPAL MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                       VALUE
  VALUE                                                     (NOTE 1)
----------                                                 -----------
<C>         <S>                                            <C>
            MUNICIPAL BONDS AND NOTES (CONTINUED)
            MICHIGAN -- 7.1%
$3,500,000  Detroit, Michigan, City School District,
             General Obligation, Tax and Revenue
             Anticipation Notes,
             5.000% due 5/1/95...........................  $ 3,508,776
 3,170,000  Wayne County, Michigan, Downriver System,
             (Comerica Bank, LOC),
             4.700% due 11/1/99++........................    3,170,000
                                                           -----------
                                                             6,678,776
                                                           -----------
            NEVADA -- 2.7%
 2,550,000  Nevada State Department Commission,
             Industrial Development Revenue,
             Series A, (Credit Commerciale, LOC),
             4.000% due 4/1/09+++........................    2,550,000
                                                           -----------
            NEW YORK -- 4.8%
 1,500,000  New York, New York, General Obligation Bonds,
             Series B-2,
             Subseries B-6, (MBIA Insured), (Westdeutsche
             Landesbank, BPA),
             4.250% due 8/15/05+.........................    1,500,000
 3,000,000  New York, New York, Revenue Anticipation
             Notes, Series B,
             4.750% due 6/30/95..........................    3,008,809
                                                           -----------
                                                             4,508,809
                                                           -----------
            OHIO -- 1.7%
   100,000  Ohio State, Water Development Authority,
             (Mead Company), Series B,
             (Swiss Bank, LOC),
             3.850% due 11/1/15+.........................      100,000
 1,465,000  Summit County, Ohio, Bond Anticipation Notes,
             Series A,
             3.700% due 3/9/95...........................    1,465,280
                                                           -----------
                                                             1,565,280
                                                           -----------
            OREGON -- 2.3%
            Oregon State Economic Development Commission
             Revenue:
 2,000,000  (Kydtaru Project), (Bank of Tokyo, LOC),
             4.000% due 12/1/99+++.......................    2,000,000
   100,000  Series B, (First Interstate Oregon, LOC),
             3.950% due 7/1/02+++........................      100,000
                                                           -----------
                                                             2,100,000
                                                           -----------
            SOUTH CAROLINA -- 3.7%
            South Carolina Jobs and Economic Development
             Authority Revenue:
             (Bank of Tokyo, LOC):
    30,000  6.000% due 12/1/98+++........................       30,000
 1,900,000  6.000% due 12/1/06+++........................    1,900,000
            (Credit Commerciale, LOC):
   200,000  4.000% due 5/1/01+++.........................      200,000
 1,320,000  4.000% due 12/1/04+++........................    1,320,000
                                                           -----------
                                                             3,450,000
                                                           -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       21
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JANUARY 31, 1995
 
                          MUNICIPAL MONEY MARKET FUND
<TABLE>
<CAPTION>
   FACE                                                       VALUE
  VALUE                                                     (NOTE 1)
----------                                                 -----------
<C>         <S>                                            <C>
            MUNICIPAL BONDS AND NOTES (CONTINUED)
            TENNESSEE -- 4.3%
$2,700,000  Coffee County, Tennessee, Industrial
             Development Board Revenue,
             (Asahi Bank, LOC),
             4.875% due 12/1/01+++.......................  $ 2,700,000
 1,300,000  Metropolitan Nashville Airport Authority of
             Tennessee,
             (Societe Generale, BPA)
             3.500% due 7/1/19+++........................    1,300,000
                                                           -----------
                                                             4,000,000
                                                           -----------
            TEXAS -- 9.3%
 2,000,000  Capital Health Facilities Development,
             (Credit Suisse, LOC),
             3.700% due 12/1/16+++.......................    2,000,000
 1,750,000  Harris County, Texas, Toll Road Unlimited Tax
             Sub Lien Revenue, Series F, Pre-refunded
             2/1/95,
             9.250% due 8/1/14++.........................    1,802,501
 1,000,000  Lubbock, Texas, Health Facilities Development
             Corporation,
             (Bankers Trust, LOC),
             3.350% due 10/1/13+++.......................    1,000,000
 2,900,000  North Texas, Higher Education, Student Loan
             Association,
             (Fuji Bank, LOC),
             3.850% due 12/1/05+++.......................    2,900,000
 1,000,000  San Antonio, Texas, Electric and Gas Revenue,
             Pre-refunded 2/1/95,
             11.125% due 2/1/09..........................    1,020,000
                                                           -----------
                                                             8,722,501
                                                           -----------
            VERMONT -- 4.3%
 4,000,000  Vermont, Industrial Development Authority,
             Pollution Control Revenue,
             (Bolton Valley Project), (Bank of New York,
             LOC),
             3.800% due 12/1/11+++.......................    4,000,000
                                                           -----------
            VIRGINIA -- 1.6%
 1,500,000  Richmond, Virginia, Redevelopment and Housing
             Authority Revenue,
             (Bayerische Landesbank, GTC),
             4.000% due 10/1/24+++.......................    1,500,000
                                                           -----------
</TABLE>
 
<TABLE>
<S>                                             <C>       <C>
TOTAL INVESTMENTS (COST $92,441,918*)........     98.8%     92,441,918
OTHER ASSETS AND LIABILITIES (NET)...........      1.2       1,153,664
                                                ------    ------------
NET ASSETS...................................    100.0%   $ 93,595,582
                                                ------    ------------
                                                ------    ------------
<FN>
------------------------
  * Aggregate cost for Federal tax purposes.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       22
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS (CONTINUED)
JANUARY 31, 1995
 
                          MUNICIPAL MONEY MARKET FUND
 
  + 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.
 
BPA   -- Instruments supported by bond purchase agreement.
FGIC  -- Federal Guaranty Insurance Corporation.
GTC   -- Instruments guaranteed by corporation.
LOC   -- Instruments supported by bank letter of credit.
MBIA  -- Municipal Bond Investors Assurance.
 
NOTE:
Approximately  60.9% 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                6.9%
Aa, Aa2, Aa3             AA                4.5
MIG1/VMIG1/P-1  A-1/A-1+/SP-1/SP-1+       67.4
MIG2/VMIG2/P-2          SP2                5.9
NR                       NR               15.3
                                      --------
                                         100.0%
                                      --------
                                      --------
# Bonds are not necessarily rated the same by
both services.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       23
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JANUARY 31, 1995
 
                       FLOATING RATE U.S. GOVERNMENT FUND
 
<TABLE>
<CAPTION>
    FACE                                                        INTEREST      MATURITY     VALUE
   VALUE                                                         RATE +       DATE ++    (NOTE 1)
 ----------                                                   -------------   --------  -----------
 <C>         <S>                                              <C>             <C>       <C>
             U.S. GOVERNMENT AGENCY OBLIGATIONS -- 83.4%
             FEDERAL HOME LOAN MORTGAGE CORPORATION (FHLMC) -- 51.8%
 $6,089,643  FHLMC..........................................      6.613%      12/1/18   $ 6,161,958
  8,815,985  FHLMC..........................................      6.701        6/1/22     8,846,290
  8,060,957  FHLMC..........................................      5.907        2/1/23     8,123,933
                                                                                        -----------
                                                                                         23,132,181
                                                                                        -----------
             FEDERAL NATIONAL MORTGAGE ASSOCIATION (FNMA) -- 31.6%
    863,023  FNMA...........................................      6.303       11/1/14       865,181
  1,475,550  FNMA...........................................      5.750        4/1/15     1,491,228
  1,370,343  FNMA...........................................      5.980        4/1/15     1,371,628
    563,690  FNMA...........................................      7.375        7/1/18       576,197
    422,478  FNMA...........................................      6.966        8/1/19       425,911
  1,168,020  FNMA...........................................      6.636        8/1/20     1,192,476
  2,656,895  FNMA...........................................      7.374       12/1/20     2,690,106
  1,225,180  FNMA...........................................      7.450       12/1/21     1,235,901
  4,233,940  FNMA...........................................      6.220        2/1/23     4,236,586
                                                                                        -----------
                                                                                         14,085,214
                                                                                        -----------
             TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS
              (COST $37,812,438)......................................................   37,217,395
                                                                                        -----------
             U.S. TREASURY OBLIGATION -- 0.3% (COST $124,981)
    125,000  U.S. Treasury Bill**...........................      5.230        2/2/95       124,981
                                                                                        -----------
             REPURCHASE AGREEMENT -- 15.1% (COST $6,772,000)
             Agreement with Chase Securities Inc. dated 1/31/95 bearing 5.950% to be
              repurchased at $6,773,119 on 2/1/95, collateralized by $8,064,166
              various mortgage-backed securities with various maturities and interest
              rates
  6,772,000   (market value -- $6,907,748)............................................
                                                                                          6,772,000
                                                                                        -----------
</TABLE>
 
<TABLE>
<S>                                                                           <C>       <C>
TOTAL INVESTMENTS (COST $44,709,419*)......................................     98.8%    44,114,376
OTHER ASSETS AND LIABILITIES (NET).........................................      1.2        523,771
                                                                              ------    -----------
NET ASSETS.................................................................   100.0 %   $44,638,147
                                                                              ------    -----------
                                                                              ------    -----------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                              NET
NUMBER OF                                                                 UNREALIZED
CONTRACTS                                                                 APPRECIATION
----------                                                                -----------
<C>          <S>                                                          <C>
             FUTURES CONTRACTS -- SHORT POSITION
     64      Eurodollar Future, March 1995.............................   $   49,450
     59      Eurodollar Future, June 1995..............................       82,660
                                                                          ----------
                                                                          $  132,110
                                                                          ----------
<FN>
------------------------
 * Aggregate cost for Federal tax purposes.
** Security pledged as collateral for futures contracts.
 +  For U.S. Treasury Obligations, the interest rate represents annualized yield
   at date of purchase (unaudited).
++ The Portfolio's duration on January 31, 1995 was approximately .75 years. The
   Portfolio's average duration would typically range from 1.0 to 1.5 years
   (unaudited).
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       24
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
PORTFOLIO OF INVESTMENTS
JANUARY 31, 1995
 
                      SHORT DURATION U.S. GOVERNMENT FUND
 
<TABLE>
<CAPTION>
    FACE                                                        INTEREST      MATURITY     VALUE
   VALUE                                                         RATE +       DATE ++    (NOTE 1)
 ----------                                                   -------------   --------  -----------
 <C>         <S>                                              <C>             <C>       <C>
             U.S. GOVERNMENT AGENCY OBLIGATIONS -- 87.0%
             FEDERAL HOME LOAN MORTGAGE CORPORATION (FHLMC) -- 82.2%
 $1,274,729  FHLMC, Multiclass..............................      8.250%      7/15/96   $ 1,278,912
  1,905,763  FHLMC, Multiclass..............................      6.500       12/15/98    1,863,777
  5,000,000  FHLMC, Multiclass..............................      7.000       5/15/02     4,879,688
  1,052,688  FHLMC, Multiclass..............................      6.500       2/15/04     1,040,845
  8,040,377  FHLMC, Multiclass..............................      5.750       5/15/05     7,929,822
  8,369,026  FHLMC, Multiclass..............................      5.875       10/15/09    8,247,414
  2,000,000  FHLMC, Multiclass..............................      6.000       3/15/10     1,960,000
                                                                                        -----------
                                                                                         27,200,458
                                                                                        -----------
             FEDERAL NATIONAL MORTGAGE ASSOCIATION (FNMA) -- 3.6%
  1,203,079  FNMA, REMIC....................................      9.000       3/25/00     1,202,703
                                                                                        -----------
             GOVERNMENT NATIONAL MORTGAGE ASSOCIATION (GNMA) -- 1.2%
    404,806  GNMA...........................................      9.650       7/25/06       403,730
                                                                                        -----------
             TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS
             (COST $29,221,093).......................................................   28,806,891
                                                                                        -----------
             U.S. TREASURY OBLIGATION -- 0.4% (COST $124,982)
    125,000  U.S. Treasury Bill**...........................      5.230        2/2/95       124,982
                                                                                        -----------
             REPURCHASE AGREEMENT -- 12.5% (COST $4,123,000)
             Agreement with Chase Securities Inc. dated 1/31/95 bearing 5.950% to be
              repurchased at $4,123,681 on 2/1/95, collateralized by $4,602,824
              various mortgage-backed securities, with various maturities and interest
              rates
  4,123,000   (market value -- $4,209,497)............................................
                                                                                          4,123,000
                                                                                        -----------
</TABLE>
 
<TABLE>
<S>                                                                           <C>       <C>
TOTAL INVESTMENTS (COST $33,469,075*)......................................     99.9%    33,054,873
OTHER ASSETS AND LIABILITIES (NET).........................................       0.1        49,559
                                                                              ------    -----------
NET ASSETS.................................................................     100.0%  $33,104,432
                                                                              ------    -----------
                                                                              ------    -----------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                       NET UNREALIZED
NUMBER OF                                                               APPRECIATION/
CONTRACTS                                                              (DEPRECIATION)
----------   ------------------------------------------------------------------------
<C>          <S>                                                          <C>
             FUTURES CONTRACTS -- SHORT POSITION
     30      Eurodollar Futures, March 1995............................   $    12,540
     30      Eurodollar Futures, June 1995.............................        24,540
     30      Eurodollar Futures, September 1995........................       (20,460)
                                                                               ------
                                                                          $    16,620
                                                                               ------
<FN>
------------------------
 * Aggregate cost for Federal tax purposes.
** Security pledged as collateral for futures contracts.
 + For U.S. Treasury Obligations, the interest rate represents annualized  yield
   at date of purchase (unaudited).
++ The Portfolio's duration on January 31, 1995 was approximately .45 years. The
   Portfolio's average duration would typically range from 1.0 to 1.5 years
   (unaudited).
  REMIC -- Real Estate Mortgage Investment Conduit.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       25
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF ASSETS AND LIABILITIES
JANUARY 31, 1995
 
<TABLE>
<CAPTION>
                                                                                                 GOVERNMENT
                                                                 PRIME          PRIME VALUE      OBLIGATIONS
                                                             MONEY MARKET      MONEY MARKET     MONEY MARKET
                                                                 FUND              FUND             FUND
                                                            ---------------   ---------------   -------------
ASSETS:
<S>                                                         <C>               <C>               <C>
Investments, at value
 See accompanying schedules:
    Securities............................................  $1,293,557,183    $1,034,024,159    $ 24,977,800
   Repurchase agreements..................................     606,434,000       459,318,000      24,466,000
                                                            ---------------   ---------------   -------------
Total investments.........................................   1,899,991,183     1,493,342,159      49,443,800
Cash......................................................             487             1,813           1,379
Receivable from Investment Adviser (Note 2)...............        --                --               --
Interest receivable.......................................       3,379,947         2,067,430         182,504
Unamortized organization costs (Note 6)...................          38,488            38,488          38,488
Other assets..............................................          50,448            49,998         --
                                                            ---------------   ---------------   -------------
 Total Assets.............................................   1,903,460,553     1,495,499,888      49,666,171
                                                            ---------------   ---------------   -------------
LIABILITIES:
Investment Advisory fee payable (Note 2)..................         780,293           132,998          24,353
Administration fee payable (Note 2).......................          51,559            34,563           1,481
Service fees payable (Note 3).............................          78,829             4,270           2,189
Transfer Agent fee payable................................          81,600            59,530           3,200
Custodian fees payable (Note 2)...........................          34,935            27,545          11,430
Dividends payable.........................................       5,286,179         3,098,307         209,062
Accrued Trustees' fees and expenses (Note 2)..............             635               495              25
Organization costs payable................................           1,531             1,531           1,481
Accrued expenses and other payables.......................         107,019            85,015          11,030
                                                            ---------------   ---------------   -------------
 Total Liabilities........................................       6,422,580         3,444,254         264,251
                                                            ---------------   ---------------   -------------
NET ASSETS................................................  $1,897,037,973    $1,492,055,634    $ 49,401,920
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
Investments, at cost (Note 1).............................  $1,899,991,183    $1,493,342,159    $ 49,443,800
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       26
<PAGE>
 
<TABLE>
<CAPTION>
                                                                                  100%
                                                                 TREASURY       TREASURY
                                                   CASH        INSTRUMENTS    INSTRUMENTS      TAX-FREE       MUNICIPAL
                                                MANAGEMENT     MONEY MARKET   MONEY MARKET   MONEY MARKET    MONEY MARKET
                                                   FUND          FUND II          FUND           FUND            FUND
                                               -------------   ------------   ------------   -------------   ------------
ASSETS:
<S>                                            <C>             <C>            <C>            <C>             <C>
Investments, at value
 See accompanying schedules:
    Securities...............................  $  1,000,000    $213,452,378   $79,161,840    $ 59,954,366    $92,441,918
   Repurchase agreements.....................     3,871,000    183,957,000        --              --             --
                                               -------------   ------------   ------------   -------------   ------------
Total investments............................     4,871,000    397,409,378     79,161,840      59,954,366     92,441,918
Cash.........................................           429            427          2,127          25,085        221,524
Receivable from Investment Adviser (Note
 2)..........................................        45,500        --             --               16,006        --
Interest receivable..........................        16,292         29,790        --              540,998      1,096,753
Unamortized organization costs (Note 6)......        38,488         38,488         38,488          38,488         38,488
Other assets.................................       --              33,450        --              --              29,450
                                               -------------   ------------   ------------   -------------   ------------
 Total Assets................................     4,971,709    397,511,533     79,202,455      60,574,943     93,828,133
                                               -------------   ------------   ------------   -------------   ------------
LIABILITIES:
Investment Advisory fee payable (Note 2).....       --             125,899          8,508         --              11,444
Administration fee payable (Note 2)..........            52         10,811          2,054           1,861          2,394
Service fees payable (Note 3)................            28          6,768        --                   15        --
Transfer Agent fee payable...................           215         16,685          3,155           2,685          5,895
Custodian fees payable (Note 2)..............        16,555         17,380         12,103          20,551         13,275
Dividends payable............................         5,483      1,269,715        348,842         188,858        180,586
Accrued Trustees' fees and expenses (Note
 2)..........................................             3             95             20              15             60
Organization costs payable...................         1,481          1,531          1,531           1,481          1,481
Accrued expenses and other payables..........         7,475         24,405         10,095           8,640         17,416
                                               -------------   ------------   ------------   -------------   ------------
 Total Liabilities...........................        31,292      1,473,289        386,308         224,106        232,551
                                               -------------   ------------   ------------   -------------   ------------
NET ASSETS...................................  $  4,940,417    $396,038,244   $78,816,147    $ 60,350,837    $93,595,582
                                               -------------   ------------   ------------   -------------   ------------
                                               -------------   ------------   ------------   -------------   ------------
Investments, at cost (Note 1)................  $  4,871,000    $397,409,378   $79,161,840    $ 59,954,366    $92,441,918
                                               -------------   ------------   ------------   -------------   ------------
                                               -------------   ------------   ------------   -------------   ------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       27
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF ASSETS AND LIABILITIES (CONTINUED)
JANUARY 31, 1995
 
<TABLE>
<CAPTION>
                                                                                                 GOVERNMENT
                                                                 PRIME          PRIME VALUE      OBLIGATIONS
                                                             MONEY MARKET      MONEY MARKET     MONEY MARKET
                                                                 FUND              FUND             FUND
                                                            ---------------   ---------------   -------------
NET ASSETS consist of:
<S>                                                         <C>               <C>               <C>
Undistributed net investment income.......................  $       19,757    $        1,576    $      1,817
Accumulated net realized gain/(loss) on investments
 sold.....................................................         (18,737)         (326,519)         (4,414)
Par value.................................................       1,897,037         1,492,381          49,405
Paid-in capital in excess of par value....................   1,895,139,916     1,490,888,196      49,355,112
                                                            ---------------   ---------------   -------------
                                                            $1,897,037,973    $1,492,055,634    $ 49,401,920
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
NET ASSETS:
  Class A.................................................  $1,538,802,416    $1,470,316,827    $ 40,079,762
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
 Class B..................................................  $  342,672,753    $   21,738,607    $  9,321,958
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
 Class C..................................................  $    7,244,907    $          100    $        100
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
 Class E..................................................  $    8,317,897    $          100    $        100
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
SHARES OUTSTANDING:
  Class A.................................................   1,538,801,574     1,470,637,137      40,081,039
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
 Class B..................................................     342,672,590        21,743,240       9,323,278
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
 Class C..................................................       7,244,890               100             100
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
 Class E..................................................       8,317,899               100             100
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
CLASS A SHARES:
Net asset value, offering and redemption price per
 share....................................................           $1.00             $1.00           $1.00
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
CLASS B SHARES:
Net asset value, offering and redemption price per
 share....................................................           $1.00             $1.00           $1.00
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
CLASS C SHARES:
Net asset value, offering and redemption price per
 share....................................................           $1.00             $1.00           $1.00
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
CLASS E SHARES:
Net asset value, offering and redemption price per
 share....................................................           $1.00             $1.00           $1.00
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       28
<PAGE>
 
<TABLE>
<CAPTION>
                                                                              100%
                                                            TREASURY        TREASURY
                                              CASH         INSTRUMENTS    INSTRUMENTS      TAX-FREE       MUNICIPAL
                                           MANAGEMENT     MONEY MARKET    MONEY MARKET   MONEY MARKET       MONEY
                                              FUND           FUND II          FUND           FUND        MARKET FUND
                                          -------------   -------------   ------------   -------------   -----------
NET ASSETS consist of:
<S>                                       <C>             <C>             <C>            <C>             <C>
Undistributed net investment income.....  $    --         $    --         $     6,349    $      4,796    $   18,620
Accumulated net realized gain/(loss) on
 investments sold.......................            10         --               3,161          (2,318)      (24,614)
Par value...............................         4,940         396,038         78,807          60,348        93,602
Paid-in capital in excess of par
 value..................................     4,935,467     395,642,206     78,727,830      60,288,011    93,507,974
                                          -------------   -------------   ------------   -------------   -----------
                                          $  4,940,417    $396,038,244    $78,816,147    $ 60,350,837    $93,595,582
                                          -------------   -------------   ------------   -------------   -----------
                                          -------------   -------------   ------------   -------------   -----------
NET ASSETS:
  Class A...............................  $  4,740,110    $368,796,404    $78,815,847    $ 60,350,537    $93,595,282
                                          -------------   -------------   ------------   -------------   -----------
                                          -------------   -------------   ------------   -------------   -----------
 Class B................................  $        100    $ 27,241,640    $       100    $        100    $      100
                                          -------------   -------------   ------------   -------------   -----------
                                          -------------   -------------   ------------   -------------   -----------
 Class C................................  $    200,107    $        100    $       100    $        100    $      100
                                          -------------   -------------   ------------   -------------   -----------
                                          -------------   -------------   ------------   -------------   -----------
 Class E................................  $        100    $        100    $       100    $        100    $      100
                                          -------------   -------------   ------------   -------------   -----------
                                          -------------   -------------   ------------   -------------   -----------
SHARES OUTSTANDING:
  Class A...............................     4,740,100     368,796,414     78,806,337      60,348,059    93,601,276
                                          -------------   -------------   ------------   -------------   -----------
                                          -------------   -------------   ------------   -------------   -----------
 Class B................................           100      27,241,640            100             100           100
                                          -------------   -------------   ------------   -------------   -----------
                                          -------------   -------------   ------------   -------------   -----------
 Class C................................       200,107             100            100             100           100
                                          -------------   -------------   ------------   -------------   -----------
                                          -------------   -------------   ------------   -------------   -----------
 Class E................................           100             100            100             100           100
                                          -------------   -------------   ------------   -------------   -----------
                                          -------------   -------------   ------------   -------------   -----------
CLASS A SHARES:
Net asset value, offering and redemption
 price per share........................         $1.00           $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         $1.00
                                          -------------   -------------   ------------   -------------   -----------
                                          -------------   -------------   ------------   -------------   -----------
CLASS C SHARES:
Net asset value, offering and redemption
 price per share........................         $1.00           $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         $1.00
                                          -------------   -------------   ------------   -------------   -----------
                                          -------------   -------------   ------------   -------------   -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       29
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF OPERATIONS
FOR THE YEAR ENDED JANUARY 31, 1995
 
<TABLE>
<CAPTION>
                                                                                         GOVERNMENT
                                                                          PRIME VALUE    OBLIGATIONS
                                                            PRIME MONEY   MONEY MARKET      MONEY
                                                            MARKET FUND       FUND       MARKET FUND
                                                            ------------  ------------   -----------
<S>                                                         <C>           <C>            <C>
INVESTMENT INCOME:
Interest..................................................  $105,358,398  $79,724,070    $3,828,853
                                                            ------------  ------------   -----------
EXPENSES:
Investment Advisory fee (Note 2)..........................    2,386,734     1,858,719        86,255
Administration fee (Note 2)...............................    2,386,734     1,858,719        86,255
Service fees (Note 3):
  Class B.................................................      726,035        40,846        19,702
 Class C..................................................       60,810       --             --
 Class D..................................................      --                  2        --
 Class E..................................................        5,834       --             --
Transfer Agent fees (Note 2)..............................      569,849       466,212        17,137
Custodian fees (Note 2)...................................      242,329       193,087        26,681
Shareholder reports expense...............................       31,381        30,057         3,698
Registration and filing fees..............................      120,889       127,299        30,991
Trustees' fees and expenses (Note 2)......................       48,947        38,868         1,851
Amortization of organization costs (Note 6)...............       12,828        12,828        12,828
Other.....................................................      192,919       141,161         5,855
Fees waived by Investment Adviser, Administrator and
 Custodian and expenses reimbursed by Investment Adviser
 (Note 2).................................................   (3,220,941 )  (2,988,819)     (135,925)
                                                            ------------  ------------   -----------
 Total expenses...........................................    3,564,348     1,778,979       155,328
                                                            ------------  ------------   -----------
NET INVESTMENT INCOME.....................................  101,794,050    77,945,091     3,673,525
                                                            ------------  ------------   -----------
NET REALIZED GAIN/(LOSS) ON INVESTMENTS (Note 1)..........      (18,737 )    (326,519)       (4,414)
                                                            ------------  ------------   -----------
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS......  $101,775,313  $77,618,572    $3,669,111
                                                            ------------  ------------   -----------
                                                            ------------  ------------   -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       30
<PAGE>
 
<TABLE>
<CAPTION>
                                                                                            100%
                                                                           TREASURY       TREASURY
                                                              CASH       INSTRUMENTS     INSTRUMENTS    TAX-FREE      MUNICIPAL
                                                            MANAGEMENT   MONEY MARKET       MONEY         MONEY         MONEY
                                                              FUND         FUND II       MARKET FUND   MARKET FUND   MARKET FUND
                                                            ---------   --------------   -----------   -----------   -----------
<S>                                                         <C>         <C>              <C>           <C>           <C>
INVESTMENT INCOME:
Interest..................................................  $440,479      $16,084,188    $3,189,635    1$,866,871    $6,715,804
                                                            ---------   --------------   -----------   -----------   -----------
EXPENSES:
Investment Advisory fee (Note 2)..........................    11,931         357,350         75,538       59,392        223,512
Administration fee (Note 2)...............................    11,931         357,350         75,538       59,392        223,512
Service fees (Note 3):
  Class B.................................................        26          83,224         --               29         --
 Class C..................................................         2         --              --           --             --
 Class D..................................................     --            --              --           --             --
 Class E..................................................     --            --              --           --             --
Transfer Agent fees (Note 2)..............................        45          86,329         16,995       10,764         54,876
Custodian fees (Note 2)...................................     6,420          50,464         26,749       30,765         66,709
Shareholder reports expense...............................    13,925          10,548          6,609        6,563         11,855
Registration and filing fees..............................    33,822          32,087         31,167       43,777         78,713
Trustees' fees and expenses (Note 2)......................       286           6,290          1,517        1,122          5,087
Amortization of organization costs (Note 6)...............    12,828          12,828         12,828       12,828         12,828
Other.....................................................       509          57,275          5,055        1,275         10,875
Fees waived by Investment Adviser, Administrator and
 Custodian and expenses reimbursed by Investment Adviser
 (Note 2).................................................   (71,147)       (549,345)      (132,141)    (129,906)      (360,053)
                                                            ---------   --------------   -----------   -----------   -----------
 Total expenses...........................................    20,578         504,400        119,855       96,001        327,914
                                                            ---------   --------------   -----------   -----------   -----------
NET INVESTMENT INCOME.....................................   419,901      15,579,788      3,069,780    1,770,870      6,387,890
                                                            ---------   --------------   -----------   -----------   -----------
NET REALIZED GAIN/(LOSS) ON INVESTMENTS (Note 1)..........       102         --               3,161       (2,318)       (24,497)
                                                            ---------   --------------   -----------   -----------   -----------
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS......  $420,003      $15,579,788    $3,072,941    1$,768,552    $6,363,393
                                                            ---------   --------------   -----------   -----------   -----------
                                                            ---------   --------------   -----------   -----------   -----------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       31
<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
                                                               MONEY MARKET      MONEY MARKET     MONEY MARKET
                                                                   FUND              FUND             FUND
                                                              ---------------   ---------------   -------------
<S>                                                           <C>               <C>               <C>
Net investment income.......................................  $  101,794,050    $   77,945,091    $  3,673,525
Net realized gain/(loss) on investments sold during the
 year.......................................................         (18,737)         (326,519)         (4,414)
                                                              ---------------   ---------------   -------------
Net increase in net assets resulting from operations........     101,775,313        77,618,572       3,669,111
Distributions to shareholders from net investment income:
  Class A...................................................     (88,718,314)      (77,274,366)     (3,323,563)
 Class B....................................................     (12,134,365)         (670,725)       (349,962)
 Class C....................................................        (746,966)               --              --
 Class E....................................................        (194,405)               --              --
Net increase/(decrease) in net assets from share
 transactions (Note 5):
  Class A...................................................  (1,327,533,646)   (2,510,545,069)    (81,449,488)
 Class B....................................................      (7,991,572)        4,239,335       9,323,178
 Class C....................................................       7,244,790                --              --
 Class D....................................................              --           (10,123)           (100)
 Class E....................................................       8,317,899               100             100
                                                              ---------------   ---------------   -------------
Net increase/(decrease) in net assets.......................  (1,319,981,266)   (2,506,642,276)    (72,130,724)
NET ASSETS:
Beginning of year...........................................   3,217,019,239     3,998,697,910     121,532,644
                                                              ---------------   ---------------   -------------
End of year (including undistributed net investment income
 of $19,757, $1,576, $1,817, $0, $0, $6,349, $4,796 and
 $18,620, respectively).....................................  $1,897,037,973    $1,492,055,634    $ 49,401,920
                                                              ---------------   ---------------   -------------
                                                              ---------------   ---------------   -------------
</TABLE>
 
------------------------------
* Formerly 100% Government Obligations Money Market Fund.
 
                       See Notes to Financial Statements.
 
                                       32
<PAGE>
 
<TABLE>
<CAPTION>
                                                                         100%
                                                       TREASURY        TREASURY
                                         CASH         INSTRUMENTS    INSTRUMENTS      TAX-FREE        MUNICIPAL
                                      MANAGEMENT     MONEY MARKET    MONEY MARKET   MONEY MARKET     MONEY MARKET
                                         FUND*          FUND II          FUND           FUND             FUND
                                     -------------   -------------   ------------   -------------    ------------
<S>                                  <C>             <C>             <C>            <C>              <C>
Net investment income..............  $    419,901    $ 15,579,788    $ 3,069,780    $  1,770,870     $ 6,387,890
Net realized gain/(loss) on
  investments sold during the
  year.............................           102              --          3,161          (2,318)        (24,497 )
                                     -------------   -------------   ------------   -------------    ------------
Net increase in net assets
  resulting from operations........       420,003      15,579,788      3,072,941       1,768,552       6,363,393
Distributions to shareholders from
  net investment income:
  Class A..........................      (419,337)    (14,277,430)    (3,069,780)     (1,770,323)     (6,387,890 )
 Class B...........................          (532)     (1,302,358)            --            (547)             --
 Class C...........................           (32)             --             --              --              --
 Class E...........................            --              --             --              --              --
Net increase/(decrease) in net
  assets from share transactions
  (Note 5):
  Class A..........................   (36,969,270)    212,014,666    (48,650,249)        618,269     (257,354,964)
 Class B...........................            --      (6,619,950)            --              --              --
 Class C...........................       200,007              --             --              --              --
 Class D...........................            --              --             --              --            (100 )
 Class E...........................           100             100            100             100             100
                                     -------------   -------------   ------------   -------------    ------------
Net increase/(decrease) in net
  assets...........................   (36,769,061)    205,394,816    (48,646,988)        616,051     (257,379,461)
NET ASSETS:
Beginning of year..................    41,709,478     190,643,428    127,463,135      59,734,786     350,975,043
                                     -------------   -------------   ------------   -------------    ------------
End of year (including
  undistributed net investment
  income of $19,757, $1,576,
  $1,817, $0, $0, $6,349, $4,796
  and $18,620, respectively).......  $  4,940,417    $396,038,244    $78,816,147    $ 60,350,837     $93,595,582
                                     -------------   -------------   ------------   -------------    ------------
                                     -------------   -------------   ------------   -------------    ------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       33
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF CHANGES IN NET ASSETS
FOR THE PERIOD ENDED JANUARY 31, 1994*
 
<TABLE>
<CAPTION>
                                                                                                 GOVERNMENT
                                                                 PRIME          PRIME VALUE      OBLIGATIONS
                                                             MONEY MARKET      MONEY MARKET     MONEY MARKET
                                                                 FUND              FUND             FUND
                                                            ---------------   ---------------   -------------
<S>                                                         <C>               <C>               <C>
Net investment income.....................................  $   36,733,367    $   35,712,810    $  2,280,080
Net realized gain/(loss) on investments sold during the
 period...................................................          19,757             1,576           1,817
                                                            ---------------   ---------------   -------------
Net increase in net assets resulting from operations......      36,753,124        35,714,386       2,281,897
Distributions to shareholders from net investment income:
  Class A.................................................     (35,241,368)      (35,371,441)     (2,270,996)
 Class B..................................................      (1,490,671)         (341,369)         (9,084)
 Class C..................................................          (1,328)         --               --
 Class D..................................................        --                --               --
Net increase in net assets from share transactions (Note
 5):
  Class A.................................................   2,866,238,320     3,981,182,129     121,530,427
 Class B..................................................     350,664,162        17,503,805         --
 Class C..................................................        --                --               --
 Class D..................................................        --                  10,100             100
                                                            ---------------   ---------------   -------------
Net increase in net assets................................   3,216,922,239     3,998,697,610     121,532,344
NET ASSETS:
Beginning of period.......................................          97,000               300             300
                                                            ---------------   ---------------   -------------
End of period.............................................  $3,217,019,239    $3,998,697,910    $121,532,644
                                                            ---------------   ---------------   -------------
                                                            ---------------   ---------------   -------------
</TABLE>
 
------------------------------
 * The Trust commenced operations on February 8, 1993.
** Formerly 100% Government Obligations Money Market Fund.
 
                       See Notes to Financial Statements.
 
                                       34
<PAGE>
 
<TABLE>
<CAPTION>
                                                                                        100%
                                                                      TREASURY        TREASURY
                                                        CASH         INSTRUMENTS    INSTRUMENTS      TAX-FREE        MUNICIPAL
                                                     MANAGEMENT     MONEY MARKET    MONEY MARKET   MONEY MARKET     MONEY MARKET
                                                       FUND**          FUND II          FUND           FUND             FUND
                                                    -------------   -------------   ------------   -------------   --------------
<S>                                                 <C>             <C>             <C>            <C>             <C>
Net investment income.............................  $    849,394    $  2,986,270    $ 2,124,699    $    371,826    $   2,619,490
Net realized gain/(loss) on investments sold
 during the period................................           (92)            (10)         6,349           4,796           18,503
                                                    -------------   -------------   ------------   -------------   --------------
Net increase in net assets resulting from
 operations.......................................       849,302       2,986,260      2,131,048         376,622        2,637,993
Distributions to shareholders from net investment
 income:
  Class A.........................................      (849,394)     (2,574,727)    (2,114,345)       (371,826)      (2,619,490)
 Class B..........................................       --             (411,543)       (10,354)        --              --
 Class C..........................................       --              --             --              --              --
 Class D..........................................       --              --             --              --              --
Net increase in net assets from share transactions
 (Note 5):
  Class A.........................................    41,709,270     156,781,648    127,456,486      59,729,690      350,956,140
 Class B..........................................       --           33,861,490        --              --              --
 Class C..........................................       --              --             --              --              --
 Class D..........................................       --              --             --              --                   100
                                                    -------------   -------------   ------------   -------------   --------------
Net increase in net assets........................    41,709,178     190,643,128    127,462,835      59,734,486      350,974,743
NET ASSETS:
Beginning of period...............................           300             300            300             300              300
                                                    -------------   -------------   ------------   -------------   --------------
End of period.....................................  $ 41,709,478    $190,643,428    $127,463,135   $ 59,734,786    $ 350,975,043
                                                    -------------   -------------   ------------   -------------   --------------
                                                    -------------   -------------   ------------   -------------   --------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       35
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF ASSETS AND LIABILITIES
JANUARY 31, 1995
 
<TABLE>
<CAPTION>
                                                                     SHORT
                                                      FLOATING      DURATION
                                                     RATE U.S.        U.S.
                                                     GOVERNMENT    GOVERNMENT
                                                        FUND          FUND
                                                    ------------  ------------
ASSETS:
<S>                                                 <C>           <C>
Investments, at value
  See accompanying schedules:
    Securities....................................  $37,342,376   $28,931,873
    Repurchase agreements.........................    6,772,000     4,123,000
                                                    ------------  ------------
Total investments.................................   44,114,376    33,054,873
Cash..............................................          758           810
Receivable for variation margin...................       32,850       --
Receivable from Investment Adviser (Note 2).......       61,158        57,100
Interest receivable...............................      324,228       157,724
Receivable for investment securities sold.........      303,369       --
Unamortized organization costs (Note 6)...........       50,000        41,667
                                                    ------------  ------------
  Total Assets....................................   44,886,739    33,312,174
                                                    ------------  ------------
LIABILITIES:
Administration fee payable (Note 2)...............        1,893         1,406
Service fees payable (Note 3).....................      --                418
Transfer Agent fee payable........................        1,856         1,355
Custodian fees payable (Note 2)...................        3,400         3,700
Payable for variation margin......................      --             11,250
Dividends payable.................................      211,068       159,442
Organization costs payable........................        4,578         5,856
Accrued Trustees' fees and expenses (Note 2)......           12            10
Accrued expenses and other payables...............       25,785        24,305
                                                    ------------  ------------
  Total Liabilities...............................      248,592       207,742
                                                    ------------  ------------
NET ASSETS........................................  $44,638,147   $33,104,432
                                                    ------------  ------------
                                                    ------------  ------------
Investments, at cost (Note 1).....................  $44,709,419   $33,469,075
                                                    ------------  ------------
                                                    ------------  ------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       36
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF ASSETS AND LIABILITIES (CONTINUED)
JANUARY 31, 1995
 
<TABLE>
<CAPTION>
                                                                      SHORT
                                                      FLOATING       DURATION
                                                     RATE U.S.         U.S.
                                                     GOVERNMENT     GOVERNMENT
                                                        FUND           FUND
                                                    ------------   ------------
NET ASSETS consist of:
<S>                                                 <C>            <C>
Undistributed net investment income/(distributions
  in excess of net investment income).............  $    (9,770)   $     7,857
Accumulated net realized gain/(loss) on
  investments sold and futures contracts..........     (175,144)        61,727
Net unrealized depreciation of investments and
  futures contracts...............................     (462,933)      (397,582)
Par value.........................................        4,532          3,346
Paid-in capital in excess of par value............   45,281,462     33,429,084
                                                    ------------   ------------
                                                    $44,638,147    $33,104,432
                                                    ------------   ------------
                                                    ------------   ------------
NET ASSETS:
Premier...........................................  $44,638,048    $31,162,015
                                                    ------------   ------------
                                                    ------------   ------------
Select............................................  $     98.51    $ 1,942,417
                                                    ------------   ------------
                                                    ------------   ------------
SHARES OUTSTANDING:
Premier...........................................    4,531,900      3,149,623
                                                    ------------   ------------
                                                    ------------   ------------
Select............................................           10        196,333
                                                    ------------   ------------
                                                    ------------   ------------
PREMIER SHARES:
Net asset value, offering and redemption price per
  share...........................................        $9.85          $9.89
                                                    ------------   ------------
                                                    ------------   ------------
SELECT SHARES:
Net asset value, offering and redemption price per
  share...........................................        $9.85          $9.89
                                                    ------------   ------------
                                                    ------------   ------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       37
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF OPERATIONS
FOR THE PERIOD ENDED JANUARY 31, 1995*
 
<TABLE>
<CAPTION>
                                                    FLOATING RATE
                                                         U.S.        SHORT DURATION
                                                      GOVERNMENT     U.S. GOVERNMENT
                                                         FUND             FUND
                                                    --------------   ---------------
INVESTMENT INCOME:
<S>                                                 <C>              <C>
Interest..........................................    $2,031,615       $1,500,450
                                                    --------------   ---------------
EXPENSES:
Investment Advisory fee (Note 2)..................       114,900           81,388
Administration fee (Note 2).......................        38,300           27,129
Service fees -- Select Shares (Note 3)............       --                 2,840
Transfer Agent fees (Note 2)......................         8,642            6,660
Custodian fees (Note 2)...........................        14,911           12,711
Registration and filing fees......................        38,690           38,607
Trustees' fees and expenses (Note 2)..............           512              361
Amortization of organization costs (Note 6).......        10,000            8,333
Other.............................................        26,772           18,233
Fees waived by Investment Adviser, Administrator
  and Custodian and expenses reimbursed by
  Investment Adviser (Note 2).....................      (215,489)        (167,267)
                                                    --------------   ---------------
  Total expenses..................................        37,238           28,995
                                                    --------------   ---------------
NET INVESTMENT INCOME.............................     1,994,377        1,471,455
                                                    --------------   ---------------
NET REALIZED AND UNREALIZED GAIN/(LOSS) ON
  INVESTMENTS
  (Notes 1 and 4):
Net realized gain/(loss) on:
  Securities......................................      (180,524)         (23,903)
  Futures contracts...............................         5,380           85,630
                                                    --------------   ---------------
Net realized gain/(loss) on investments during the
  period..........................................      (175,144)          61,727
                                                    --------------   ---------------
Net change in unrealized
  appreciation/(depreciation) of:
  Securities......................................      (595,043)        (414,202)
  Futures contracts...............................       132,110           16,620
                                                    --------------   ---------------
Net unrealized depreciation of investments during
  the period......................................      (462,933)        (397,582)
                                                    --------------   ---------------
Net realized and unrealized loss on investments
  during the period...............................      (638,077)        (335,855)
                                                    --------------   ---------------
NET INCREASE IN NET ASSETS RESULTING FROM
  OPERATIONS......................................    $1,356,300       $1,135,600
                                                    --------------   ---------------
                                                    --------------   ---------------
<FN>
--------------------------
* The Floating Rate U.S. Government Fund and the Short Duration U.S. Government
Fund commenced operations on March 28, 1994.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       38
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
STATEMENTS OF CHANGES IN NET ASSETS
FOR THE PERIOD ENDED JANUARY 31, 1995*
 
<TABLE>
<CAPTION>
                                                     FLOATING RATE U.S.     SHORT DURATION U.S.
                                                      GOVERNMENT FUND         GOVERNMENT FUND
                                                    --------------------   ---------------------
Net investment income.............................  $        1,994,377     $        1,471,455
<S>                                                 <C>                    <C>
Net realized gain/(loss) on investments sold
  during the period...............................            (175,144)                61,727
Net unrealized depreciation of investments and
  futures contracts during the period.............            (462,933)              (397,582)
                                                           -----------            -----------
Net increase in net assets resulting from
  operations......................................           1,356,300              1,135,600
Distributions to shareholders from net investment
  income:
  Premier.........................................          (2,004,147)            (1,402,859)
  Select..........................................                  --                (60,739)
Net increase in net assets from share transactions
  (Note 5):
  Premier.........................................          45,285,894             31,480,990
  Select..........................................                  --              1,951,340
                                                           -----------            -----------
Net increase in net assets........................          44,638,047             33,104,332
NET ASSETS:
Beginning of period...............................                 100                    100
                                                           -----------            -----------
End of period (including undistributed net
  investment income/ (distributions in excess of
  net investment income) of $(9,770) and $7,857,
  respectively)...................................  $       44,638,147     $       33,104,432
                                                           -----------            -----------
                                                           -----------            -----------
<FN>
--------------------------
* The Floating Rate U.S. Government Fund and the Short Duration U.S. Government
Fund commenced operations on March 28, 1994.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       39
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
For a Share outstanding throughout each year.
 
                            PRIME MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                                  YEAR       PERIOD        YEAR      PERIOD       YEAR     PERIOD      PERIOD
                                                 ENDED        ENDED       ENDED       ENDED      ENDED      ENDED       ENDED
                                                1/31/95     1/31/94*     1/31/95    1/31/94*    1/31/95   1/31/94*    1/31/95*
                                               ----------  -----------   --------   ---------   --------  ---------   ---------
 
<S>                                            <C>         <C>           <C>        <C>         <C>       <C>         <C>
                                                CLASS A      CLASS A     CLASS B     CLASS B    CLASS C    CLASS C     CLASS E
                                               ----------  -----------   --------   ---------   --------  ---------   ---------
Net asset value,
 beginning of year...........................  $     1.00  $     1.00    $   1.00   $   1.00    $   1.00  $   1.00    $   1.00
                                               ----------  -----------   --------   ---------   --------  ---------   ---------
Net investment income+++.....................      0.0442      0.0310      0.0417     0.0110      0.0407    0.0001      0.0165
Dividends from net investment income.........     (0.0442)    (0.0310)    (0.0417)   (0.0110)    (0.0407)  (0.0001)    (0.0165)
                                               ----------  -----------   --------   ---------   --------  ---------   ---------
Net asset value, end of year.................  $     1.00  $     1.00    $   1.00   $   1.00    $   1.00  $   1.00    $   1.00
                                               ----------  -----------   --------   ---------   --------  ---------   ---------
                                               ----------  -----------   --------   ---------   --------  ---------   ---------
Total return++...............................       4.52%       3.14%       4.21%      0.99%       4.14%   -- ***        1.66%
                                               ----------  -----------   --------   ---------   --------  ---------   ---------
                                               ----------  -----------   --------   ---------   --------  ---------   ---------
Ratios to average net assets/ supplemental
 data:
  Net assets, end of year
   (in 000's)................................  $1,538,802  $2,866,353    $342,673   $350,666    $  7,245    -- #      $  8,318
  Ratio of net investment income to average
   net assets................................       4.30%       3.16%+      4.05%      2.91%+      3.95%     2.81%+      4.15%+
  Ratio of operating expenses to average net
   assets**..................................       0.12%       0.11%+      0.37%      0.36%+      0.47%     0.46%+      0.27%+
<FN>
------------------------
  * 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.
 ** Annualized expense ratios before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A, Class B and Class C
    for the year ended January 31, 1995 were 0.25%, 0.50% and 0.60%,
    respectively, for Class E for the period ended January 31, 1995 was 0.39%,
    and for Class A, Class B and Class C for the period ended January 31, 1994
    were 0.33%, 0.58% and 0.68%, 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.
+++ Net investment income before waiver of fees by the Investment Adviser,
Administrator, Custodian
   and/or Transfer Agent and/or expenses reimbursed by the Investment Adviser
and Administrator for Class A, Class B and Class C for the year ended January
31, 1995 was $0.0428, $0.0403 and $0.0393, respectively, for Class E for the
period ended January 31, 1995 was $0.0160, and for Class A, Class B and Class C
for the period ended January 31, 1994 was $0.0289, $0.0102 and $0.0001,
respectively.
 # Total net assets for Class C were $100 at January 31, 1994.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       40
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH YEAR.
 
                         PRIME VALUE MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                                                      YEAR       PERIOD        YEAR     PERIOD      PERIOD
                                                                     ENDED        ENDED       ENDED      ENDED       ENDED
                                                                    1/31/95     1/31/94*     1/31/95   1/31/94*    1/31/94*
                                                                   ----------  -----------   --------  ---------   ---------
<S>                                                                <C>         <C>           <C>       <C>         <C>
                                                                    CLASS A      CLASS A     CLASS B    CLASS B     CLASS D
                                                                   ----------  -----------   --------  ---------   ---------
Net asset value, beginning of year...............................  $     1.00  $     1.00    $   1.00  $   1.00    $   1.00
                                                                   ----------  -----------   --------  ---------   ---------
Net investment income+++.........................................      0.0442      0.0315      0.0417    0.0125      0.0021
Dividends from net investment income.............................     (0.0442)    (0.0315)    (0.0417)  (0.0125)    (0.0021)
                                                                   ----------  -----------   --------  ---------   ---------
Net asset value, end of year.....................................  $     1.00  $     1.00    $   1.00  $   1.00    $   1.00
                                                                   ----------  -----------   --------  ---------   ---------
                                                                   ----------  -----------   --------  ---------   ---------
Total return++...................................................       4.51%       3.21%       4.26%     1.26%       0.26%
                                                                   ----------  -----------   --------  ---------   ---------
                                                                   ----------  -----------   --------  ---------   ---------
Ratios to average net assets/supplemental data:
  Net assets, end of year (in 000's).............................  $1,470,317  $3,981,184    $ 21,739  $ 17,504    $     10
  Ratio of net investment income to average net assets...........       4.20%       3.23%+      3.95%     2.98%+      3.10%+
  Ratio of operating expenses to average net assets**............       0.09%       0.07%+      0.34%     0.32%+      0.20%+
<FN>
------------------------
  * The Prime Value Money Market Fund Class A, Class B and Class D Shares
    commenced operations on February 8, 1993, September 1, 1993 and January 6,
    1994, respectively.
 ** Annualized expense ratios before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A and Class B for the
    year ended January 31, 1995 were 0.25% and 0.50%, respectively, and for
    Class A, Class B and Class D for the period ended January 31, 1994 were
    0.36%, 0.61% and 0.49%, respectively.
  + Annualized.
 ++ Total return represents aggregate total return for the periods indicated.
+++ Net investment income before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A and Class B for the
    year ended January 31, 1995 was $0.0426 and $0.0398, respectively, and for
    Class A, Class B and Class D for the period ended January 31, 1994 was
    $0.0287, $0.0113 and $0.0010, respectively.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       41
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH YEAR.
 
                    GOVERNMENT OBLIGATIONS MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                                                               YEAR      PERIOD       YEAR     PERIOD
                                                                              ENDED       ENDED      ENDED      ENDED
                                                                             1/31/95    1/31/94*    1/31/95   1/31/94*
                                                                             --------   ---------   --------  ---------
<S>                                                                          <C>        <C>         <C>       <C>
                                                                             CLASS A     CLASS A    CLASS B    CLASS B
                                                                             --------   ---------   --------  ---------
Net asset value, beginning of year.........................................  $  1.00    $   1.00    $   1.00  $   1.00
                                                                             --------   ---------   --------  ---------
Net investment income+++...................................................   0.0435      0.0309      0.0410    0.0091
Dividends from net investment income.......................................  (0.0435 )   (0.0309)    (0.0410)  (0.0091)
                                                                             --------   ---------   --------  ---------
Net asset value, end of year...............................................  $  1.00    $   1.00    $   1.00  $   1.00
                                                                             --------   ---------   --------  ---------
                                                                             --------   ---------   --------  ---------
Total return++.............................................................    4.45%       3.14%       4.19%     0.90%
                                                                             --------   ---------   --------  ---------
                                                                             --------   ---------   --------  ---------
Ratios to average net assets/supplemental data:
  Net assets, end of year (in 000's).......................................  $40,080    $121,532    $  9,322    -- #
  Ratio of net investment income to average net assets.....................    4.28%       3.18%+      4.03%     2.93%+
  Ratio of operating expenses to average net assets**......................    0.16%       0.03%+      0.41%     0.28%+
<FN>
------------------------
  * The Government Obligations Money Market Fund Class A and Class B Shares
    commenced operations on February 8, 1993 and August 16, 1993, respectively.
 ** Annualized expense ratios before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A and Class B for the
    year ended January 31, 1995 were 0.31% and 0.56%, respectively, and for the
    period ended January 31, 1994 were 0.53% and 0.78%, respectively.
  + Annualized.
 ++ Total return represents aggregate total return for the periods indicated.
+++ Net investment income before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A and Class B for the
    year ended January 31, 1995 was $0.0419 and $0.0394, respectively, and for
    the period ended January 31, 1994 was $0.0261 and $0.0075, respectively.
 # Total net assets for Class B were $100 at January 31, 1994.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       42
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH YEAR.
 
                              CASH MANAGEMENT FUND
 
<TABLE>
<CAPTION>
                                                                 YEAR           PERIOD          PERIOD        PERIOD
                                                                ENDED            ENDED          ENDED         ENDED
                                                               1/31/95         1/31/94*        1/31/95*      1/31/95*
                                                             ------------    -------------    ----------    ----------
 
<S>                                                          <C>             <C>              <C>           <C>
                                                               CLASS A          CLASS A        CLASS B       CLASS C
                                                             ------------    -------------    ----------    ----------
Net asset value, beginning of year........................   $       1.00    $     1.00       $   1.00      $   1.00
                                                             ------------    -------------    ----------    ----------
Net investment income+++..................................         0.0421        0.0304         0.0001        0.0001
Dividends from net investment income......................        (0.0421)      (0.0304)       (0.0001)      (0.0001)
                                                             ------------    -------------    ----------    ----------
Net asset value, end of year..............................   $       1.00    $     1.00       $   1.00      $   1.00
                                                             ------------    -------------    ----------    ----------
                                                             ------------    -------------    ----------    ----------
Total return++............................................          4.26%         3.09%        --***           0.01%
                                                             ------------    -------------    ----------    ----------
                                                             ------------    -------------    ----------    ----------
Ratios to average net assets/supplemental data:
  Net assets, end of year (in 000's)......................   $      4,740    $   41,709         -- #        $    200
  Ratio of net investment income to average net assets....          3.52%         3.11%+         3.27%+        3.17%+
  Ratio of operating expenses to average net assets**.....          0.17%         0.06%+         0.42%+        0.52%+
<FN>
------------------------
  * 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.
 ** Annualized expense ratios before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A, Class B and Class C
    for the year ended January 31, 1995 were 0.77%, 1.02% and 1.12%,
    respectively, and for Class A for the period ended January 31, 1994 were
    0.92%.
*** 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.
+++ Net investment income before waiver of fees by the Investment Adviser,
Administrator, Custodian
   and/or Transfer Agent and/or expenses reimbursed by the Investment Adviser
and Administrator for Class A, Class B and Class C for the year ended January
31, 1995 was $0.0350, $0.0001 and $0.0001, respectively, and for Class A for the
period ended January 31, 1994 was $0.0220.
 # Total net assets for Class B were $100 at January 31, 1995.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       43
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
For a Share outstanding throughout each year.
 
                   TREASURY INSTRUMENTS MONEY MARKET FUND II
 
<TABLE>
<CAPTION>
                                                                               YEAR     PERIOD       YEAR     PERIOD
                                                                              ENDED      ENDED      ENDED      ENDED
                                                                             1/31/95   1/31/94*    1/31/95   1/31/94*
                                                                             --------  ---------   --------  ---------
<S>                                                                          <C>       <C>         <C>       <C>
                                                                             CLASS A    CLASS A    CLASS B    CLASS B
                                                                             --------  ---------   --------  ---------
Net asset value, beginning of year.........................................  $   1.00  $   1.00    $   1.00  $   1.00
                                                                             --------  ---------   --------  ---------
Net investment income+++...................................................    0.0424    0.0300      0.0399    0.0198
Dividends from net investment income.......................................   (0.0424)  (0.0300)    (0.0399)  (0.0198)
                                                                             --------  ---------   --------  ---------
Net asset value, end of year...............................................  $   1.00  $   1.00    $   1.00  $   1.00
                                                                             --------  ---------   --------  ---------
                                                                             --------  ---------   --------  ---------
Total return++.............................................................     4.32%     3.04%       4.05%     2.00%
                                                                             --------  ---------   --------  ---------
                                                                             --------  ---------   --------  ---------
Ratios to average net assets/supplemental data:
  Net assets, end of year (in 000's).......................................  $368,796  $156,782    $ 27,242  $ 33,862
  Ratio of net investment income to average net assets.....................     4.38%     3.12%+      4.13%     2.87%+
  Ratio of operating expenses to average net assets**......................     0.12%     0.03%+      0.37%     0.28%+
<FN>
------------------------
  * 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 expense ratios before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A and Class B for the
    year ended January 31, 1995 were 0.27% and 0.52%, respectively, and for the
    period ended January 31, 1994 were 0.49% and 0.74%, respectively.
  + Annualized.
 ++ Total return represents aggregate total return for the periods indicated.
+++ Net investment income before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A and Class B for the
    year ended January 31, 1995 was $0.0407 and $0.0384, respectively, and for
    the period ended January 31, 1994 was $0.0256 and $0.0166, respectively.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       44
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH YEAR.
 
                  100% TREASURY INSTRUMENTS MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                                                               YEAR       PERIOD      PERIOD
                                                                               ENDED       ENDED       ENDED
                                                                              1/31/95    1/31/94*    1/31/94*
                                                                             ---------   ---------   ---------
<S>                                                                          <C>         <C>         <C>
                                                                              CLASS A     CLASS A     CLASS B
                                                                             ---------   ---------   ---------
Net asset value, beginning of year.........................................  $   1.00    $   1.00    $   1.00
                                                                             ---------   ---------   ---------
Net investment income+++...................................................    0.0408      0.0292      0.0149
Dividends from net investment income.......................................   (0.0408)    (0.0292)    (0.0149)
                                                                             ---------   ---------   ---------
Net asset value, end of year...............................................  $   1.00    $   1.00    $   1.00
                                                                             ---------   ---------   ---------
                                                                             ---------   ---------   ---------
Total return++.............................................................     4.17%       2.95%       1.55%
                                                                             ---------   ---------   ---------
                                                                             ---------   ---------   ---------
Ratios to average net assets/supplemental data:
  Net assets, end of year (in 000's).......................................  $ 78,816    $127,463      -- #
  Ratio of net investment income to average net assets.....................     4.06%       3.03%+      2.78%+
  Ratio of operating expenses to average net assets**......................     0.16%       0.05%+      0.30%+
<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 expense ratios before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A for the year ended
    January 31, 1995 were 0.33%, and for Class A and Class B for the period
    ended January 31, 1994 were 0.51% and 0.76%, respectively.
  + Annualized.
 ++ Total return represents aggregate total return for the periods indicated.
+++ Net investment income before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A for the year ended
    January 31, 1995 was $0.0391, and for Class A and Class B for the period
    ended January 31, 1994 was $0.0248 and $0.0124, respectively.
 # Total net assets for Class B were $100 at January 31, 1994.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       45
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH YEAR.
 
                           TAX-FREE MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                                                               YEAR       PERIOD      PERIOD
                                                                               ENDED       ENDED       ENDED
                                                                              1/31/95    1/31/94*    1/31/95*
                                                                             ---------   ---------   ---------
<S>                                                                          <C>         <C>         <C>
                                                                              CLASS A     CLASS A     CLASS B
                                                                             ---------   ---------   ---------
Net asset value, beginning of year.........................................  $    1.00   $   1.00    $   1.00
                                                                             ---------   ---------   ---------
Net investment income+++...................................................     0.0288     0.0228      0.0263
Dividends from net investment income.......................................    (0.0288)   (0.0228)    (0.0263)
                                                                             ---------   ---------   ---------
Net asset value, end of year...............................................  $    1.00   $   1.00    $   1.00
                                                                             ---------   ---------   ---------
                                                                             ---------   ---------   ---------
Total return++.............................................................      2.93%      2.30%       2.63%
                                                                             ---------   ---------   ---------
                                                                             ---------   ---------   ---------
Ratios to average net assets/supplemental data:
  Net assets, end of year (in 000's).......................................  $  60,351   $ 59,735      -- #
  Ratio of net investment income to average net assets.....................      2.99%      2.38%+      2.74%+
  Ratio of operating expenses to average net assets**......................      0.16%      0.11%+      0.41%+
<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 expense ratios before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A for the year ended
    January 31, 1995 and for the period ended January 31, 1994 were 0.38% and
    1.52%, respectively, and for Class B for the year ended January 31, 1995 was
    0.63%.
  + Annualized.
 ++ Total return represents aggregate total return for the periods indicated.
+++ Net investment income before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A for the year ended
    January 31, 1995 was $0.0266, and for the period ended January 31, 1994 was
    $0.0093, and for Class B for the year ended January 31, 1995 was $0.0242.
 # Total net assets for Class B were $100 at January 31, 1995.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       46
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT EACH YEAR.
 
                          MUNICIPAL MONEY MARKET FUND
 
<TABLE>
<CAPTION>
                                                                               YEAR     PERIOD
                                                                              ENDED      ENDED
                                                                             1/31/95   1/31/94*
                                                                             --------  ---------
<S>                                                                          <C>       <C>
                                                                             CLASS A    CLASS A
                                                                             --------  ---------
Net asset value, beginning of year.........................................  $   1.00  $   1.00
                                                                             --------  ---------
Net investment income+++...................................................    0.0300    0.0243
Dividends from net investment income.......................................   (0.0300)  (0.0243)
                                                                             --------  ---------
Net asset value, end of year...............................................  $   1.00  $   1.00
                                                                             --------  ---------
                                                                             --------  ---------
Total return++.............................................................     3.04%     2.46%
                                                                             --------  ---------
                                                                             --------  ---------
Ratios to average net assets/supplemental data:
  Net assets, end of year (in 000's).......................................  $ 93,595  $350,975
  Ratio of net investment income to average net assets.....................     2.86%     2.53%+
  Ratio of operating expenses to average net assets**......................     0.15%     0.13%+
<FN>
------------------------
  * The Municipal Money Market Fund Class A Shares commenced operations on
February 8, 1993.
 ** Annualized expense ratios before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A for the year ended
    January 31, 1995 and for the period ended January 31, 1994 were 0.31% and
    0.51%, respectively.
  + Annualized.
 ++ Total return represents aggregate total return for the periods indicated.
+++ Net investment income before waiver of fees by the Investment Adviser,
    Administrator, Custodian and/or Transfer Agent and/or expenses reimbursed by
    the Investment Adviser and Administrator for Class A for the year ended
    January 31, 1995 and for the period ended January 31, 1994 was $0.0283 and
    $0.0201, respectively.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       47
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD.
 
                       FLOATING RATE U.S. GOVERNMENT FUND
 
<TABLE>
<CAPTION>
                                                              PERIOD
                                                              ENDED
                                                             1/31/95*
                                                             --------
 
<S>                                                          <C>
                                                             PREMIER
                                                             --------
Net asset value, beginning of period......................   $ 10.00
                                                             --------
Net investment income+++..................................      0.43
Net realized and unrealized loss on investments...........     (0.14)
                                                             --------
Net increase in net assets resulting from investment
 operations...............................................      0.29
Dividends from net investment income......................     (0.44)
                                                             --------
Net asset value, end of period............................   $  9.85
                                                             --------
                                                             --------
Total return++............................................     2.96%
                                                             --------
                                                             --------
Ratios to average net assets/supplemental data:
  Net assets, end of period (in 000's)....................   $44,638
  Ratio of net investment income to average net assets....     5.21%+
  Ratio of operating expenses to average net assets**.....     0.10%+
Portfolio turnover rate...................................      164%
<FN>
------------------------
  * The Floating Rate U.S. Government Fund Premier Shares commenced operations
on March 28, 1994.
 ** Annualized expense ratio before waiver of fees by the Investment Adviser,
    Administrator and Custodian and expenses reimbursed by the Investment
    Adviser for Premier Shares for the period ended January 31, 1995 was 0.66%.
  + Annualized.
 ++ Total return represents aggregate total return for the period indicated.
+++ Net investment income before waiver of fees by the Investment Adviser,
    Administrator and Custodian and expenses reimbursed by the Investment
    Adviser for Premier Shares for the period ended January 31, 1995 was $0.39.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       48
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FINANCIAL HIGHLIGHTS
FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD.
 
                      SHORT DURATION U.S. GOVERNMENT FUND
 
<TABLE>
<CAPTION>
                                                              PERIOD      PERIOD
                                                              ENDED       ENDED
                                                             1/31/95*    1/31/95*
                                                             --------    --------
 
<S>                                                          <C>         <C>
                                                             PREMIER      SELECT
                                                             --------    --------
Net asset value, beginning of period......................   $ 10.00     $  9.94
                                                             --------    --------
Net investment income+++..................................      0.46        0.30
Net realized and unrealized loss on investments...........     (0.12)      (0.04)
                                                             --------    --------
Net increase in net assets resulting from investment
 operations...............................................      0.34        0.26
Dividends from net investment income......................     (0.45)      (0.31)
                                                             --------    --------
Net asset value, end of period............................   $  9.89     $  9.89
                                                             --------    --------
                                                             --------    --------
Total return++............................................     3.54%       2.72%
                                                             --------    --------
                                                             --------    --------
Ratios to average net assets/supplemental data:
  Net assets, end of period (in 000's)....................   $31,162     $ 1,942
  Ratio of net investment income to average net assets....     5.43%+      5.18%+
  Ratio of operating expenses to average net assets**.....     0.10%+      0.35%+
Portfolio turnover rate...................................      112%        112%
<FN>
------------------------
  * The Short Duration U.S. Government Fund Premier and Select Shares commenced
    operations on March 28, 1994 and June 29, 1994, respectively.
 ** Annualized expense ratios before waiver of fees by the Investment Adviser,
    Administrator and Custodian and expenses reimbursed by Investment Adviser
    for Premier and Select Shares for the period ended January 31, 1995 were
    0.71% and 0.96%, respectively.
  + Annualized.
 ++ Total return represents aggregate total return for the period indicated.
+++ Net investment income before waiver of fees by the Investment Adviser,
Administrator and
   Custodian and expenses reimbursed by Investment Adviser for Premier and
Select Shares for the
   period ended January 31, 1995 was $0.40 and $0.27, respectively.
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       49
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
Notes to Financial Statements
 
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 ten 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, Municipal  Money Market  Fund, (collectively  the "Money  Market  Funds"),
Floating  Rate  U.S. Government  Fund and  Short  Duration U.S.  Government Fund
(collectively with the Money Market Funds, the "Funds"). All Money Market  Funds
currently  offer four classes of shares: Class A, Class B, Class C, and Class E.
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  Floating
Rate  U.S. Government  Fund and  Short Duration  U.S. Government  Fund currently
offer two classes  of shares:  Premier and Select  shares. Class  A and  Premier
shares  are sold to institutional investors that have not entered into servicing
agreements.  Class  B,  Class  C,  Class  E  and  Select  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, Class E and Select
shares possess  certain exclusive  voting rights  on matters  relating to  their
respective  service fees. The Board of Trustees has authorized the issuance of a
third class  of shares  for the  Floating Rate  U.S. Government  Fund and  Short
Duration U.S. Government Fund, which are designated for individual investors and
may  be offered through Lehman Brothers  and brokerage firms not affiliated with
Lehman Brothers.  As of  January 31,  1995, no  such shares  have been  offered.
Shares  of  the  Treasury  Instruments  Money  Market  Fund  and  the California
Municipal Money Market Fund  were no longer  sold to the public  as of July  29,
1994 and January 30, 1995, respectively, and such Funds ceased to exist.
 
    On  November 2, 1994, the Board of Trustees authorized the issuance of a new
class for Treasury Instrument Money Market Fund II. The new class is intended to
be distributed exclusively  through the  broker-dealer affiliate  of a  national
bank  to its institutional  clients. The bank's  broker-dealer affiliate will be
paid a distribution fee of up to 0.50%. Also on this date, the Board of Trustees
authorized the issuance  of Class  G shares  for the  100% Treasury  Instruments
Money  Market Fund. The  Trust is also  authorized to issue  shares of the Short
Duration Municipal Fund  and the  New York Municipal  Money Market  Fund. As  of
January 31, 1995, no such shares have been offered.
 
    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  Money Market 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.
 
    For  the  Floating  Rate  U.S.  Government  Fund  and  Short  Duration  U.S.
Government Fund, portfolio  securities for which  market quotations are  readily
available  will be valued on the basis of a pricing model or by prices furnished
by a pricing service. Portfolio securities  for which market quotations are  not
readily  available and other assets  will be valued at  fair value using methods
determined in good faith by or under the supervision of the Trustees. Short-term
obligations having 60 days or less to maturity are valued at amortized cost.
 
    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
 
                                       50
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
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 and Administrator, acting under
the supervision of the Board of Trustees, review 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.
 
    FUTURES CONTRACTS:   The Floating Rate  U.S. Government Fund  and the  Short
Duration  U.S.  Government  Fund  may engage  in  futures  transactions  on U.S.
Government Securities,  mortgage securities  and Eurodollar  securities for  the
purpose  of hedging against the effects of  changes in interest rates and market
conditions to  assist in  reducing fluctuations  in the  net asset  value.  Upon
entering  into a  futures contract,  the Fund  is required  to deposit  with the
broker an amount of cash  or cash equivalents equal  to a certain percentage  of
the  contract amount. This is known as the "initial margin." Subsequent payments
("variation margin")  are generally  made  or received  by  the Fund  each  day,
depending  on the  daily fluctuation  of the  value of  the contract.  The daily
changes in the  contract are recorded  as unrealized gains  or losses. The  Fund
recognizes a realized gain or loss when the contract is closed.
 
    There are several risks in connection with the use of futures contracts as a
hedging  device.  The  change  in  the  value  of  futures  contracts  primarily
corresponds with  the  value of  their  underlying instruments,  which  may  not
correlate  with the change in the value  of the hedged instruments. In addition,
there is the risk the Fund may not  be able to enter into a closing  transaction
because of an illiquid secondary market.
 
    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  intend to qualify as regulated investment
companies by complying  with the requirements  of the Internal  Revenue Code  of
1986,  as  amended,  and applicable  to  regulated investment  companies  and by
distributing substantially all  of their taxable  income to their  shareholders.
Therefore, no Federal income tax provision is required.
 
    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 Money Market Funds do not expect to realize any net long-term
capital gains and  therefore do not  contemplate payments of  any capital  gains
dividends. Net capital gain distributions, if any, will be made annually for the
Floating Rate U.S. Government Fund and the Short Duration U.S. Government Fund.
 
    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  and January  3, 1994. LBGAM  is a  wholly-owned subsidiary  of
Lehman  Brothers Holdings Inc. ("Holdings"). As of December 31, 1994, FMR Corp.,
Nippon Life  Insurance Company  and  Heine Securities  Corporation  beneficially
owned  approximately  12.3%, 8.7%  and  5.1%, respectively,  of  the outstanding
voting   securities    of    Holdings.    Under    the    Investment    Advisory
 
                                       51
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
Agreements,  LBGAM is  entitled to receive  a monthly  fee at an  annual rate of
0.10% of the  value of each  Money Market  Fund's average daily  net assets  and
0.30%  of the value of  the average daily net assets  for the Floating Rate U.S.
Government Fund and the Short Duration U.S. Government Fund. For the year  ended
January  31,  1995, LBGAM  voluntarily waived  fees  and reimbursed  expenses as
follows:
 
<TABLE>
<CAPTION>
                                                        FEES WAIVED    EXPENSES REIMBURSED
                                                        ------------   -------------------
<S>                                                     <C>            <C>
Prime Money Market Fund...............................  $1,171,734          $--
Prime Value Money Market Fund.........................   1,388,554          --
Government Obligations Money Market Fund..............      48,079          --
Cash Management Fund..................................      11,931            45,500
Treasury Instruments Money Market Fund II.............     231,451          --
100% Treasury Instruments Money Market Fund...........      54,308          --
Tax-Free Money Market Fund............................      59,392             9,042
Municipal Money Market Fund...........................     150,715          --
Floating Rate U.S. Government Fund....................     114,900            61,158
Short Duration U.S. Government Fund...................      81,388            57,100
</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.
 
    Prior to the close of business on May 6, 1994, The Boston Company  Advisors,
Inc.  served as  the Trust's Administrator  and received fees  equivalent to the
current rate for its services.
 
    For the  year ended  January  31, 1995,  the  Administrator waived  fees  as
follows:
 
<TABLE>
<CAPTION>
                                                                                        FEES WAIVED
                                                                                        ------------
<S>                                                                                     <C>
Prime Money Market Fund...............................................................  $1,815,227
Prime Value Money Market Fund.........................................................   1,414,970
Government Obligations Money Market Fund..............................................      64,842
Cash Management Fund..................................................................       9,110
Treasury Instruments Money Market Fund II.............................................     269,369
100% Treasury Instruments Money Market Fund...........................................      56,601
Tax-Free Money Market Fund............................................................      44,947
Municipal Money Market Fund...........................................................     171,438
Floating Rate U.S. Government Fund....................................................      27,951
Short Duration U. S. Government Fund..................................................      19,779
</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 (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 year  ended January  31, 1995,  Boston Safe  waived fees  as
follows:
 
<TABLE>
<CAPTION>
                                                                             FEES WAIVED
                                                                             -----------
<S>                                                                          <C>
Prime Money Market Fund....................................................    $233,980
Prime Value Money Market Fund..............................................     185,295
Government Obligations Money Market Fund...................................      23,004
Cash Management Fund.......................................................       4,606
Treasury Instruments Money Market Fund II..................................      48,525
100% Treasury Instruments Money Market Fund................................      21,232
Tax-Free Money Market Fund.................................................      16,525
Municipal Money Market Fund................................................      37,900
Floating Rate U.S. Government Fund.........................................      11,480
Short Duration U.S. Government Fund........................................       9,000
</TABLE>
 
3. SERVICE 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, Class  E and  Select shares.  Under the
Service Agreements  each Fund  compensates service  organizations for  servicing
shareholder accounts and covers expenses incurred in distributing Class B, Class
C,  Class E and Select 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 Class  E;
0.25% for the Class B and Select shares; and 0.35% for the Class C shares.
 
4. PURCHASES AND SALES OF SECURITIES
 
    The  aggregate  cost of  purchases and  proceeds  from sales  of securities,
excluding short-term investments, for  the year ended January  31, 1995 were  as
follows:
 
<TABLE>
<CAPTION>
                                                              PURCHASES          SALES
                                                             ------------     ------------
<S>                                                          <C>              <C>
Floating Rate U.S. Government Fund.......................    $96,525,131      $57,982,559
Short Duration U.S. Government Fund......................     58,737,914       29,420,123
</TABLE>
 
    At  January  31,  1995,  aggregate  gross  unrealized  appreciation  for all
securities of the Funds in which there is  an excess of value over tax cost  and
aggregate  gross unrealized depreciation for all securities in which there is an
excess of tax cost over value were as follows:
 
<TABLE>
<CAPTION>
                                                              TAX BASIS        TAX BASIS
                                                              UNREALIZED       UNREALIZED
                                                             APPRECIATION     DEPRECIATION
                                                             ------------     ------------
<S>                                                          <C>              <C>
Floating Rate U.S. Government Fund.......................        $15,238         $610,281
Short Duration U.S. Government Fund......................            207          414,409
</TABLE>
 
5. 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 Money
Market Fund and three classes for the Floating Rate U.S. Government Fund and the
Short  Duration U.S.  Government Fund.  Since the  Money Market  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 of the amounts  shown
below for such transactions.
 
                                       53
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
    The  Tables below summarize transactions of  each Class of shares, at $1.00,
for the Funds noted:
 
<TABLE>
<CAPTION>
                                                         YEAR ENDED
                                                          1/31/95
PRIME MONEY MARKET        ------------------------------------------------------------------------
FUND:                                            CLASS B            CLASS C            CLASS E
                                             ---------------    ---------------    ---------------
                              CLASS A
                          ---------------
<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>
 
<TABLE>
<CAPTION>
                                              PERIOD ENDED
                                                1/31/94*
                          -----------------------------------------------------
                              CLASS A            CLASS B            CLASS C
                          ---------------    ---------------    ---------------
<S>                       <C>                <C>                <C>                <C>
Sold..................     21,207,896,867        548,120,402         16,828,189
Dividend
Reinvestment..........          7,640,432                548          --
Redeemed..............    (18,349,298,979)      (197,456,788)       (16,828,189)
                          ---------------    ---------------    ---------------
Net increase..........      2,866,238,320        350,664,162          --
                          ---------------    ---------------    ---------------
                          ---------------    ---------------    ---------------
</TABLE>
<TABLE>
<CAPTION>
                                                         YEAR ENDED
                                                          1/31/95
PRIME VALUE MONEY         ------------------------------------------------------------------------
MARKET FUND:                                     CLASS B            CLASS D            CLASS E
                                             ---------------    ---------------    ---------------
                              CLASS A
                          ---------------
<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>
 
                                              PERIOD ENDED
                                                1/31/94*
                          -----------------------------------------------------
                              CLASS A            CLASS B            CLASS D
                          ---------------    ---------------    ---------------
<S>                       <C>                <C>                <C>                <C>
Sold..................     16,321,320,158         51,179,212             10,100
Dividend
Reinvestment..........          7,546,037          --                 --
Redeemed..............    (12,347,684,066)       (33,675,407)         --
                          ---------------    ---------------    ---------------
Net increase..........      3,981,182,129         17,503,805             10,100
                          ---------------    ---------------    ---------------
                          ---------------    ---------------    ---------------
</TABLE>
 
                                       54
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
<TABLE>
<CAPTION>
                                                         YEAR ENDED
                                                          1/31/95
GOVERNMENT OBLIGATIONS    ------------------------------------------------------------------------
MONEY MARKET FUND:                               CLASS B            CLASS D            CLASS E
                                             ---------------    ---------------    ---------------
                              CLASS A
                          ---------------
<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
                          ---------------    ---------------    ---------------    ---------------
                          ---------------    ---------------    ---------------    ---------------
 
<CAPTION>
                                              PERIOD ENDED
                                                1/31/94*
                          -----------------------------------------------------
                              CLASS A            CLASS B            CLASS D
                          ---------------    ---------------    ---------------
<S>                       <C>                <C>                <C>                <C>
Sold..................        691,207,998          1,002,462                100
Dividend
Reinvestment..........            579,010              8,677          --
Redeemed..............       (570,256,581)        (1,011,139)         --
                          ---------------    ---------------    ---------------
Net increase..........        121,530,427          --                       100
                          ---------------    ---------------    ---------------
                          ---------------    ---------------    ---------------
</TABLE>
<TABLE>
<CAPTION>
                                                         YEAR ENDED
                                                          1/31/95
                          ------------------------------------------------------------------------
CASH MANAGEMENT FUND:                            CLASS B            CLASS C            CLASS E
                                             ---------------    ---------------    ---------------
                              CLASS A
                          ---------------
<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>
 
                           PERIOD ENDED
                             1/31/94*
                          ---------------
                              CLASS A
                          ---------------
<S>                       <C>                <C>                <C>                <C>
Sold..................         94,083,622
Dividend
Reinvestment..........              1,889
Redeemed..............        (52,376,241)
                          ---------------
Net increase..........         41,709,270
                          ---------------
                          ---------------
</TABLE>
 
                                       55
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
<TABLE>
<CAPTION>
                                                               YEAR ENDED
                                                                 1/31/95
TREASURY INSTRUMENTS MONEY MARKET FUND    -----------------------------------------------------
II:                                                              CLASS B            CLASS E
                                                             ---------------    ---------------
                                              CLASS A
                                          ---------------
<S>                                       <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>
 
                                                     PERIOD ENDED
                                                       1/31/94*
                                          ----------------------------------
                                              CLASS A            CLASS B
                                          ---------------    ---------------
<S>                                       <C>                <C>                <C>
Sold..................................      1,213,748,675         34,177,279
Dividend Reinvestment.................            172,105            411,598
Redeemed..............................     (1,057,139,132)          (727,387)
                                          ---------------    ---------------
Net increase..........................        156,781,648         33,861,490
                                          ---------------    ---------------
                                          ---------------    ---------------
</TABLE>
<TABLE>
<CAPTION>
                                                      YEAR ENDED
                                                       1/31/95
100% TREASURY INSTRUMENTS MONEY MARKET    ----------------------------------
FUND:                                                            CLASS E
                                                             ---------------
                                              CLASS A
                                          ---------------
<S>                                       <C>                <C>                <C>
Sold..................................        302,935,830                100
Dividend Reinvestment.................             70,170          --
Redeemed..............................       (351,656,249)         --
                                          ---------------    ---------------
Net increase/(decrease)...............        (48,650,249)               100
                                          ---------------    ---------------
                                          ---------------    ---------------
 
<CAPTION>
                                                     PERIOD ENDED
                                                       1/31/94*
                                          ----------------------------------
                                              CLASS A            CLASS B
                                          ---------------    ---------------
<S>                                       <C>                <C>                <C>
Sold..................................        300,937,678          1,196,815
Dividend Reinvestment.................          --                     8,667
Redeemed..............................       (173,481,192)        (1,205,482)
                                          ---------------    ---------------
Net increase..........................        127,456,486          --
                                          ---------------    ---------------
                                          ---------------    ---------------
</TABLE>
 
                                       56
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
<TABLE>
<CAPTION>
                                                                   YEAR ENDED
                                                                    1/31/95
                                             ------------------------------------------------------
TAX FREE MONEY MARKET FUND:                                          CLASS B            CLASS E
                                                                 ---------------    ---------------
                                                 CLASS A
                                             ---------------
<S>                                          <C>                 <C>                <C>
Sold.....................................       685,428,863            1,072,223                100
Dividend Reinvestment....................           232,374                  272          --
Redeemed.................................      (685,042,968 )         (1,072,495)         --
                                             ---------------     ---------------    ---------------
Net increase.............................           618,269            --                       100
                                             ---------------     ---------------    ---------------
                                             ---------------     ---------------    ---------------
 
<CAPTION>
                                              PERIOD ENDED
                                                1/31/94*
                                             ---------------
                                                 CLASS A
                                             ---------------
<S>                                          <C>                 <C>                <C>
Sold.....................................       159,786,350
Dividend Reinvestment....................            11,346
Redeemed.................................      (100,068,006 )
                                             ---------------
Net increase.............................        59,729,690
                                             ---------------
                                             ---------------
</TABLE>
<TABLE>
<CAPTION>
                                                                   YEAR ENDED
                                                                    1/31/95
                                             ------------------------------------------------------
MUNICIPAL MONEY MARKET FUND:                                         CLASS D            CLASS E
                                                                 ---------------    ---------------
                                                 CLASS A
                                             ---------------
<S>                                          <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
                                             ---------------     ---------------    ---------------
                                             ---------------     ---------------    ---------------
 
<CAPTION>
                                                        PERIOD ENDED
                                                          1/31/94*
                                             -----------------------------------
                                                 CLASS A             CLASS D
                                             ---------------     ---------------
<S>                                          <C>                 <C>                <C>
Sold.....................................     1,935,295,434                  100
Dividend Reinvestment....................           300,097            --
Redeemed.................................    (1,584,639,391 )          --
                                             ---------------     ---------------
Net increase.............................       350,956,140                  100
                                             ---------------     ---------------
                                             ---------------     ---------------
</TABLE>
 
                                 *  *  *  *  *
 
    The Table below summarizes transactions  of Premier shares for the  FLOATING
RATE U.S. GOVERNMENT FUND:
 
<TABLE>
<CAPTION>
                                                        PERIOD ENDED
                                                         1/31/95**
                                             ----------------------------------
                                                 SHARES             AMOUNT
                                             ---------------    ---------------
<S>                                          <C>                <C>                <C>                <C>
Sold.....................................          4,923,126    $    49,150,877
Redeemed.................................           (391,226)        (3,864,983)
                                             ---------------    ---------------
Net increase.............................          4,531,900    $    45,285,894
                                             ---------------    ---------------
                                             ---------------    ---------------
</TABLE>
 
                                       57
<PAGE>
LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
    The Table below summarizes transactions of Premier and Select shares for the
SHORT DURATION U.S. GOVERNMENT FUND:
 
<TABLE>
<CAPTION>
                                                                           PERIOD ENDED
                                                                            1/31/95**
                                             ------------------------------------------------------------------------
                                                       PREMIER SHARES                        SELECT SHARES
                                             ----------------------------------    ----------------------------------
                                                 SHARES             AMOUNT             SHARES             AMOUNT
                                             ---------------    ---------------        -------        ---------------
<S>                                          <C>                <C>                <C>                <C>
Sold.....................................          3,150,273    $    31,487,472            196,486    $     1,952,951
Dividend Reinvestment....................              6,592             65,428          --                 --
Redeemed.................................             (7,242)           (71,910)              (163)            (1,611)
                                             ---------------    ---------------            -------    ---------------
Net increase.............................          3,149,623    $    31,480,990            196,323    $     1,951,340
                                             ---------------    ---------------            -------    ---------------
                                             ---------------    ---------------            -------    ---------------
<FN>
------------------------
 * The Money Market Funds commenced operations on February 8, 1993.
** The Floating Rate U.S. Government Fund and the Short Duration U.S. Government
   Fund commenced operations on March 28, 1994.
</TABLE>
 
    As  of January 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 January 31, 1995, the Money  Market Funds, except Prime Money Market Fund
and Cash Management Fund, had  each issued 100 Class C  shares in the amount  of
$100  to Lehman Brothers, Inc.  As of January 31,  1995, the Money Market Funds,
except Prime Money Market Fund, had each issued 100 Class E shares in the amount
of $100 to Lehman Brothers, Inc. As of January 31, 1995, the Floating Rate  U.S.
Government  Fund had issued  ten Select shares  in the amount  of $100 to Lehman
Brothers Inc. During the  year ended January  31, 1995, there  was no income  or
expenses  allocated to Class B, Class C, Class D, Class E and Select shares that
did not have share transactions with third parties.
 
6. 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.
 
7. CAPITAL LOSS CARRYFORWARD
 
    At  January 31, 1995,  the following Funds had  available for Federal income
tax purposes unused capital losses as follows:
 
<TABLE>
<CAPTION>
  NAME OF FUND                            EXPIRING IN 2002   EXPIRING 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>
 
                                       58
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS
 
To the Shareholders and Trustees
Lehman Brothers Institutional Funds Group Trust
 
    We have  audited  the accompanying  statements  of assets  and  liabilities,
including  the portfolios of investments, of Lehman Brothers Institutional Funds
Group Trust (the Trust), (comprising respectively, the 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,  Floating  Rate  U.S.  Government  Fund  and  Short  Duration  U.S.
Government  Fund,  collectively the  Funds),  as of  January  31, 1995,  and the
related statements of operations  and changes in net  assets, and the  financial
highlights  for each  of the  periods indicated therein  for each  Fund class of
shares.  These   financial  statements   and   financial  highlights   are   the
responsibility  of the Trust's  management. Our responsibility  is to express an
opinion on  these financial  statements and  financial highlights  based on  our
audits.
 
    We  conducted  our audits  in  accordance with  generally  accepted auditing
standards. Those standards require that we plan and perform the audit to  obtain
reasonable  assurance  about  whether  the  financial  statements  and financial
highlights are free of material misstatement. An audit includes examining, on  a
test  basis, evidence  supporting the amounts  and disclosures  in the financial
statements. Our  procedures  included confirmation  of  securities owned  as  of
January  31, 1995,  by correspondence with  the custodian and  brokers. An audit
also includes assessing the accounting principles used and significant estimates
made by  management,  as well  as  evaluating the  overall  financial  statement
presentation.  We believe  that our  audits provide  a reasonable  basis for our
opinion.
 
    In our opinion, the financial  statements and financial highlights  referred
to  above present  fairly, in all  material respects, the  financial position of
each of the  respective Funds constituting  Lehman Brothers Institutional  Funds
Group  Trust at January 31, 1995, the results of their operations and changes in
their net assets,  and financial highlights  for each of  the periods  indicated
therein  for each  Fund class of  shares, in conformity  with generally accepted
accounting principles.
 
                                          ERNST & YOUNG LLP
 
Boston, Massachusetts
March 15, 1995
 
                                       59
<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
                       Floating Rate U.S. Government Fund
                      Short Duration U.S. Government 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.



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