LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
497, 1994-07-05
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PROSPECTUS

Prime Money Market Fund

An Investment Portfolio Offered By
Lehman Brothers Institutional Funds Group Trust

	Lehman Brothers Institutional Funds Group Trust (the 
"Trust") is a no-load, open-end, management investment company. 
The shares described in this Prospectus represent interests in the 
Prime Money Market Fund portfolio (the "Fund"), one of a family of 
portfolios of the Trust. 

	The Fund's investment objective is to provide current income 
and stability of principal. The Fund invests in a portfolio 
consisting of a broad range of short-term instruments, including 
U.S. government and U.S. bank and commercial obligations and 
repurchase agreements relating to such obligations. 

	Fund shares may not be purchased by individuals directly, 
but institutional investors may purchase shares for accounts 
maintained by individuals. The Fund currently offers three classes 
of shares. In addition to Class A shares, institutional investors 
may purchase on behalf of their customers Class B or Class C 
shares which accrue daily dividends in the same manner as Class A 
shares but bear all fees payable by the Fund to institutional 
investors for certain services they provide to the beneficial 
owners of such shares. See "Management of the Fund_Service 
Organizations." 

	Lehman Brothers Inc. ("Lehman Brothers") sponsors the Fund 
and acts as Distributor of its shares. Lehman Brothers Global 
Asset Management Inc. serves as the Fund's Investment Adviser. 

	The address of the Fund is One Exchange Place, Boston, 
Massachusetts 02109. The Fund can be contacted as follows: for 
purchase and redemption orders only call 1-800-851-3134; for yield 
information call 1-800-238-2560 (Class A shares code: 001; Class B 
shares code: 101; Class C shares code: 201); for other information 
call 1-800-368-5556. 

	This Prospectus briefly sets forth certain information about 
the Fund that investors should know before investing. Investors 
are advised to read this Prospectus and retain it for future 
reference. Additional information about the Fund, contained in a 
Statement of Additional Information dated May 31, 1994, as amended 
or supplemented from time to time, has been filed with the 
Securities and Exchange Commission and is available to investors 
without charge by calling the Fund's Distributor at 
1-800-368-5556. The Statement of Additional Information is 
incorporated in its entirety by reference into this Prospectus. 

	Shares of the Fund are not deposits or obligations of, or 
guaranteed or endorsed by, any bank, and such shares are not 
federally insured by the Federal Deposit Insurance Corporation, 
the Federal Reserve Board or any other government agency. Shares 
of the Fund involve certain investment risks, including the 
possible loss of principal. An investment in the Fund is neither 
insured nor guaranteed by the U.S. government. There can be no 
assurance that the Fund will be able to maintain its net asset 
value of $1.00 per share. 

___________

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE 
SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES 
COMMISSION
PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE. 

___________

LEHMAN BROTHERS
BACKGROUND AND EXPENSE INFORMATION

	The following Expense Summary lists the costs and expenses 
that an investor in the Fund can expect to incur during the Fund's 
current fiscal year ending January 31, 1995. The Fund offers three 
separate classes of shares. Shares of each class represent equal, 
pro rata interests in the Fund and accrue daily dividends in the 
same manner except that Class B and Class C shares bear fees 
payable by the Fund (at the rate of .25% and .35% per annum, 
respectively) to institutions for services they provide to the 
beneficial owners of such shares. See "Management of the 
Fund_Service Organizations." 

Expense Summary

	


C
l
a
s
s
 
A

S
h
a
r
e
s

C
l
a
s
s
 
B

S
h
a
r
e
s

C
l
a
s
s
 
C

S
h
a
r
e
s


	Annual Fund Operating Expenses
(as a percentage of average net assets)




			Advisory Fees
0
.
1
0
%

0
.
1
0
%

0
.
1
0
%


			Rule 12b-1 fees
n
o
n
e

.
2
5
%

.
3
5
%


			Other Expenses_including 
Administration Fees
(net of applicable fee waivers)*
0
.
0
6
%

0
.
0
6
%

0
.
0
6
%


	







			Total Fund Operating 
Expenses (after fee waivers)*
.
1
6
%

.
4
1
%

.
5
1
%


	











_____

_Fn_

	

	
* 	The Expense Summary above has been restated to reflect current 
expected fees and the Fund's Investment Adviser's and Administrator's 
voluntary fee waiver and expense reimbursement arrangements in effect for 
the Fund's fiscal year ending January 31, 1995.




	In order to maintain a competitive expense ratio during 
1994, the Funds' Investment Adviser and Administrator have 
voluntarily agreed to waive fees and reimburse expenses if and to 
the extent that total operating expenses (other than taxes, 
interest, brokerage fees and commissions, Rule 12b-1 fees and 
extraordinary expenses) exceed .16% of average daily net assets 
through December 31, 1994. For 1995 and thereafter, the Investment 
Adviser and Administrator intend to continue voluntarily to waive 
fees and reimburse expenses to the extent necessary to maintain an 
annualized expense ratio at a level no greater than .18% of 
average daily net assets. The voluntary fee waiver and fee 
reimbursement arrangements described above will not be changed 
unless shareholders are provided at least 60 days' advance notice. 
The maximum annual contractual fees payable to the Investment 
Adviser and Administrator total .20% of average daily net assets. 
Absent fee waivers, the Total Fund Operating Expenses of Class A, 
Class B and Class C are expected to be .24%, .49% and .59%, 
respectively, of the Fund's average daily net assets.

_____

Example: An investor would pay the following expenses on a $1,000 
investment, assuming (1) a 5% annual return and (2) redemption at 
the end of each time period with respect to the following shares: 


1
 
Y
e
a
r

3
 
Y
e
a
r
s

5
 
Y
e
a
r
s

1
0
 
Y
e
a
r
s


	Class A shares:
$
2

$
5

$
9

$
2
0


	Class B shares:
$
4

$
1
3

$
2
3

$
5
2


	Class C shares:
$
5

$
1
6

$
2
9

$
6
4


 THE FOREGOING SHOULD NOT BE CONSIDERED A REPRESENTATION OF ACTUAL 
EXPENSES AND RATES OF RETURN, WHICH MAY BE GREATER OR LESSER THAN 
THOSE SHOWN. 

	The purpose of the foregoing table is to assist an investor 
in understanding the various costs and expenses that an investor 
in the Fund will bear directly or indirectly. Certain Service 
Organizations (as defined below) also may charge their clients 
fees in connection with investments in Fund shares, which fees are 
not reflected in the table. For more complete descriptions of the 
various costs and expenses, see "Management of the Fund" in this 
Prospectus and the Statement of Additional Information. 

FINANCIAL HIGHLIGHTS

	

	The following financial highlights for the fiscal year ended 
January 31, 1994 is derived from the Fund's Financial Statements 
audited by Ernst & Young, independent auditors, whose report 
thereon appears in the Trust's Annual Report dated January 31, 
1994. This information should be read in conjunction with the 
financial statements and notes thereto that also appear in the 
Trust's Annual Report, which are incorporated by reference into 
the Statement of Additional Information. 


P
e
r
i
o
d
 
E
n
d
e
d

1
/
3
1
/
9
4
*

C
l
a
s
s
 
A

P
e
r
i
o
d
 
E
n
d
e
d

1
/
3
1
/
9
4
*

C
l
a
s
s
 
B

P
e
r
i
o
d
 
E
n
d
e
d

1
/
3
1
/
9
4
*

C
l
a
s
s
 
C


	Net asset value, 
beginning of period
$
1
.
0
0

$
1
.
0
0

$
1
.
0
0


	Net investment 
income(1)
0
.
0
3
1
0

0
.
0
1
1
0

0
.
0
0
0
1


	Dividends from net 
investment income
(
0
.
0
3
1
0
)

(
0
.
0
1
1
0
)

(
0
.
0
0
0
1
)


	Net asset value, end 
of period
$
1
.
0
0

$
1
.
0
0

$
1
.
0
0


	Total return(2)
3
.
1
4
%

0
.
9
9
%

_
(
3
)


	Ratios to average net 
assets/supplemental data:




	Net assets, end of 
period (in 000's)
$
2
,
8
6
6
,
3
5
3

$
3
5
0
,
6
6
6

_
(
4
)


	Ratio of net 
investment income to average 
net assets(5)
3
.
1
6
%

2
.
9
1
%

2
.
8
1
%


	Ratio of operating 
expenses to average net 
assets(5)(6)
0
.
1
1
%

0
.
3
6
%

0
.
4
6
%



_Fn_


	


	


	
*

The Prime Money Market Fund Class A, Class B and Class C Shares 
commenced operations on February 8, 1993, September 2, 1993 and 
December 27, 1993, respectively.

	
(
1
)

Net investment income before waiver of fees by the Investment Adviser, 
Administrator, Custodian and Transfer Agent and expenses reimbursed by 
the Investment Adviser and Administrator for Class A, Class B and 
Class C were $0.0289, $0.0102 and $0.0001, respectively.(2)Total 
return represents aggregate total return for the period 
indicated.(3)Full amount of shares offered to the public on 
December 27, 1993 and were redeemed on December 28, 1993, therefore, 
total return deemed not to be meaningful.(4)Total net assets for 
Class C was $100 at January 31, 1994.(5)Annualized.(6)Annualized 
expense ratio before waiver of fees by the Investment Adviser, 
Administrator, Custodian and Transfer Agent and expenses reimbursed by 
the Investment Adviser and Administrator for Class A, Class B and 
Class C were 0.33%, 0.58% and 0.68%, respectively.


INVESTMENT OBJECTIVE AND POLICIES

In General

	The Fund's investment objective is to provide current income 
and stability of principal. In pursuing its investment objective, 
the Fund, which operates as a diversified investment portfolio, 
invests in a broad range of short-term instruments, including U.S. 
government and U.S. bank and commercial obligations and repurchase 
agreements relating to such obligations. 

 Price and Portfolio Maturity.  The Fund invests only in 
securities that are purchased with and payable in U.S. dollars and 
that have (or, pursuant to regulations adopted by the Securities 
and Exchange Commission, will be deemed to have) remaining 
maturities of thirteen months or less at the date of purchase by 
the Fund. The Fund maintains a dollar-weighted average portfolio 
maturity of 90 days or less. The Fund follows these policies to 
maintain a constant net asset value of $1.00 per share, although 
there is no assurance that it can do so on a continuing basis. 

 Portfolio Quality and Diversification.  The Fund will limit its 
portfolio investments to securities that the Trust's Board of 
Trustees determines present minimal credit risks and which are 
"First Tier Eligible Securities" at the time of acquisition by the 
Fund. The term First Tier Eligible Securities includes securities 
rated by the "Requisite NRSROs" in the highest short-term rating 
categories, securities of issuers that have received such ratings 
with respect to other short-term debt securities and comparable 
unrated securities. "Requisite NRSROs" means (a) any two 
nationally recognized statistical rating organizations ("NRSROs") 
that have issued a rating with respect to a security or class of 
debt obligations of an issuer, or (b) one NRSRO, if only one NRSRO 
has issued such a rating at the time that the Fund acquires the 
security. Currently, there are six NRSROs: Standard & Poor's 
Corporation, Moody's Investors Service, Inc., Fitch Investors 
Services, Inc., Duff and Phelps, Inc., IBCA Limited and its 
affiliate, IBCA, Inc. and Thomson Bankwatch. A discussion of the 
ratings categories of the NRSROs is contained in the Appendix to 
the Statement of Additional Information. The Fund generally may 
not invest more than 5% of its total assets in the securities of 
any one issuer, except for U.S. government securities.

	The following descriptions illustrate the kinds of 
instruments in which the Fund invests: 

	The Fund may purchase U.S. bank and bank holding company 
obligations such as commercial paper, notes, certificates of 
deposit, bankers' acceptances and time deposits, including 
instruments issued or supported by the credit of domestic banks or 
savings institutions having total assets at the time of purchase 
in excess of $1 billion. The Fund may also make interest- bearing 
savings deposits in commercial and savings banks in amounts not in 
excess of 5% of the Fund's assets. 

	The Fund may invest in commercial paper and other short-term 
obligations. The Fund may not invest in commercial paper or 
obligations of foreign issuers. 

	The Fund may purchase variable or floating rate notes, which 
are unsecured instruments that provide for adjustments in the 
interest rate on certain reset dates or whenever a specified 
interest rate index changes, respectively. Such notes may not be 
actively traded in a secondary market, but, in some cases, the 
Fund may be able to resell such notes in the dealer market. 
Variable and floating notes typically are rated by credit rating 
agencies, and their issuers must satisfy the same quality criteria 
as set forth above. The Fund invests in variable or floating rate 
notes only when the Investment Adviser deems the investment to 
involve minimal credit risk. 

	The Fund may purchase instruments from financial 
institutions, such as banks and broker- dealers, subject to the 
seller's agreement to repurchase them at an agreed upon time and 
price ("repurchase agreements"). The seller under a repurchase 
agreement will be required to maintain the value of the securities 
subject to the agreement at not less than the repurchase price. 
Default by the seller would, however, expose the Fund to possible 
loss because of adverse market action or delay in connection with 
the disposition of the underlying obligations. 
	The Fund may also purchase securities on a "when-issued" 
basis. When-issued securities are securities purchased for 
delivery beyond the normal settlement date at a stated price and 
yield. The Fund will generally not pay for such securities or 
start earning interest on them until they are received. Securities 
purchased on a when-issued basis are recorded as an asset and are 
subject to changes in value based upon changes in the general 
level of interest rates. The Fund expects that commitments to 
purchase when-issued securities will not exceed 25% of the value 
of its total assets absent unusual market conditions. The Fund 
does not intend to purchase when-issued securities for speculative 
purposes but only in furtherance of its investment objective. 

	The Fund may purchase obligations issued or guaranteed by 
the U.S. government or its agencies and instrumentalities. 
Obligations of certain agencies and instrumentalities of the U.S. 
government are backed by the full faith and credit of the United 
States. Others are backed by the right of the issuer to borrow 
from the U.S. Treasury or are backed only by the credit of the 
agency or instrumentality issuing the obligation. 

	In addition, the Fund may, when deemed appropriate in light 
of the Fund's investment objective, invest in high quality, 
short-term obligations issued by the state and local governmental 
issuers which carry yields that are competitive with those of 
other types of money market instruments of comparable quality. 

	The Fund will not knowingly invest more than 10% of the 
value of its total assets in illiquid securities, including time 
deposits and repurchase agreements having maturities longer than 
seven days. Securities that have readily available market 
quotations are not deemed illiquid for purposes of this limitation 
(irrespective of any legal or contractual restrictions on resale). 
The Fund may invest in commercial obligations issued in reliance 
on the so-called "private placement" exemption from registration 
afforded by Section 4(2) of the Securities Act of 1933, as amended 
("Section 4(2) paper"). The Fund may also purchase securities that 
are not registered under the Securities Act of 1933, as amended, 
but which can be sold to qualified institutional buyers in 
accordance with Rule 144A under that Act ("Rule 144A securities"). 
Section 4(2) paper is restricted as to disposition under the 
federal securities laws, and generally is sold to institutional 
investors such as the Fund who agree that they are purchasing the 
paper for investment and not with a view to public distribution. 
Any resale by the purchaser must be in an exempt transaction. 
Section 4(2) paper normally is resold to other institutional 
investors like the Fund through or with the assistance of the 
issuer or investment dealers who make a market in the Section 
4(2) paper, thus providing liquidity. Rule 144A securities 
generally must be sold to other qualified institutional buyers. If 
a particular investment in Section 4(2) paper or Rule 144A 
securities is not determined to be liquid, that investment will be 
included within the 10% limitation on investment in illiquid 
securities. 

	There can be no assurance that the Fund will achieve its 
investment objective. 

Investment Limitations

	The Fund's investment objective and the policies described 
above are not fundamental and may be changed by the Trust's Board 
of Trustees without a vote of shareholders. If there is a change 
in the investment objective, investors should consider whether the 
Fund remains an appropriate investment in light of their then 
current financial position and needs. The Fund's investment 
limitations summarized below may not be changed without the 
affirmative vote of the holders of a majority of its outstanding 
shares. (A complete list of the investment limitations that cannot 
be changed without a vote of shareholders is contained in the 
Statement of Additional Information under "Investment Objective 
and Policies.")

The Fund may not: 1.Borrow money, except from banks for temporary 
purposes and then in amounts not in excess of 10% of the value of 
the Fund's assets at the time of such borrowing; or pledge any 
assets except in connection with any such borrowing and in amounts 
not in excess of the lesser of the dollar amounts borrowed or 10% 
of the value of the Fund's assets at the time of such borrowing. 
Additional investments will not be made when borrowings exceed 5% 
of the Fund's assets. 2.Purchase any securities which would cause 
25% or more of the value of its total assets at the time of 
purchase to be invested in the securities of issuers conducting 
their principal business activities in the same industry, provided 
that there is no limitation with respect to investments in U.S. 
government obligations and obligations of domestic banks. 

PURCHASE AND REDEMPTION OF SHARES

Purchase Procedures

	Shares of the Fund are sold at the net asset value per share 
of the Fund next determined after receipt of a purchase order by 
Lehman Brothers, the Distributor of the Fund's shares. Purchase 
orders for shares are accepted only on days on which both Lehman 
Brothers and the Federal Reserve Bank of Boston are open for 
business and must be transmitted to Lehman Brothers, by telephone 
at 1-800-851-3134. Orders received prior to noon, Eastern time, 
for which payment has been received by Boston Safe Deposit and 
Trust Company ("Boston Safe"), the Fund's Custodian, will be 
executed at noon. Orders received between noon and 3:00 P.M., 
Eastern time, will be executed at 3:00 P.M., Eastern time, if 
payment has been received by Boston Safe by 3:00 P.M. and will be 
executed at 4:00 P.M. if payment has been received by 4:00 P.M. 
Orders received after 3:00 P.M., and orders for which payment has 
not been received by 4:00 P.M., Eastern time, will not be 
accepted, and notice thereof will be given to the institution 
placing the order. Payment for Fund shares may be made only in 
federal funds immediately available to Boston Safe. (Payment for 
orders which are not received or accepted by Lehman Brothers will 
be returned after prompt inquiry to the sending institution.) The 
Fund may in its discretion reject any order for shares. 

	The minimum aggregate initial investment by an institution 
in the investment portfolios that comprise the Trust is $1 million 
(with not less than $25,000 invested in any one investment 
portfolio offered by the Trust); however, broker-dealers and other 
institutional investors may set a higher minimum for their 
customers. To reach the minimum Trust-wide initial investment, 
purchases of shares may be aggregated over a period of six months. 
There is no minimum subsequent investment. 

	Conflict of interest restrictions may apply to an 
institution's receipt of compensation paid by the Fund on 
fiduciary funds that are invested in Class B or Class C shares. 
See also "Management of the Fund_Service Organizations." 
Institutions, including banks regulated by the Comptroller of the 
Currency and investment advisers and other money managers subject 
to the jurisdiction of the Securities and Exchange Commission, the 
Department of Labor or state securities commissions, are urged to 
consult their legal advisers before investing fiduciary funds in 
Class B or Class C shares. 

 Subaccounting Services.  Institutions are encouraged to open 
single master accounts. However, certain institutions may wish to 
use the Transfer Agent's subaccounting system to minimize their 
internal recordkeeping requirements. The Transfer Agent charges a 
fee based on the level of subaccounting services rendered. 
Institutions holding Fund shares in a fiduciary, agency, custodial 
or similar capacity may charge or pass through subaccounting fees 
as part of or in addition to normal trust or agency account fees. 
They may also charge fees for other services provided which may be 
related to the ownership of Fund shares. This Prospectus should, 
therefore, be read together with any agreement between the 
customer and the institution with regard to the services provided, 
the fees charged for those services and any restrictions and 
limitations imposed. 

Redemption Procedures

	Redemption orders must be transmitted to Lehman Brothers by 
telephone at 1-800-851-3134. Payment for redeemed shares for which 
a redemption order is received by Lehman Brothers before 
3:00 P.M., Eastern time, on a day that both Lehman Brothers and 
the Federal Reserve Bank of Boston are open for business is 
normally made in federal funds wired to the redeeming shareholder 
on the same business day. Payment for redemption orders which are 
received between 3:00 P.M. and 4:00 P.M., Eastern time, is 
normally wired in federal funds on the next business day following 
redemption. 

	Shares are redeemed at the net asset value per share next 
determined after Lehman Brothers' receipt of the redemption order. 
While the Fund intends to use its best efforts to maintain its net 
asset value per share at $1.00, the proceeds paid to an investor 
upon redemption may be more or less than the amount invested 
depending upon a share's net asset value at the time of 
redemption. To allow the Fund's Investment Adviser to manage the 
Fund effectively, investors are strongly urged to initiate all 
investments or redemptions of Fund shares as early in the day as 
possible and to notify Lehman Brothers at least one day in advance 
of transactions in excess of $5 million. 

	The Fund reserves the right to wire redemption proceeds 
within seven days after receiving the redemption order if, in the 
judgment of the Investment Adviser, an earlier payment could 
adversely affect the Fund. The Fund shall have the right to redeem 
involuntarily shares in any account at their net asset value if 
the value of the account is less than $10,000 after 60 days' prior 
written notice to the investor. Any such redemption shall be 
effected at the net asset value per share next determined after 
the redemption order is entered. If during the 60-day period the 
investor increases the value of its account to $10,000 or more, no 
such redemption shall take place. In addition, the Fund may redeem 
shares involuntarily or suspend the right of redemption as 
permitted under the Investment Company Act of 1940, as amended 
(the "1940 Act"), or under certain special circumstances described 
in the Statement of Additional Information under "Additional 
Purchase and Redemption Information." 

Valuation of Shares_Net Asset Value

	The Fund's net asset value per share for purposes of pricing 
purchase and redemption orders is determined by the Fund's 
Administrator as of noon, 3:00 P.M. and 4:00 P.M., Eastern time, 
on each weekday, with the exception of those holidays on which 
either Lehman Brothers or the Federal Reserve Bank of Boston is 
closed. Currently, one or both of these institutions are closed on 
the customary national business holidays of New Year's Day, Martin 
Luther King, Jr's. Birthday (observed), Presidents' Day 
(Washington's Birthday), Good Friday, Memorial Day, Independence 
Day, Labor Day, Columbus Day (observed), Veterans Day, 
Thanksgiving Day and Christmas Day, and on the preceding Friday or 
subsequent Monday when one of these holidays falls on a Saturday 
or Sunday, respectively. The net asset value per share of Fund 
shares is calculated by adding the value of all securities and 
other assets of the Fund, subtracting liabilities, and dividing 
the result by the total number of the Fund's outstanding shares 
(irrespective of class or sub-class). In computing net asset 
value, the Fund uses the amortized cost method of valuation as 
described in the Statement of Additional Information under 
"Additional Purchase and Redemption Information." The Fund's net 
asset value per share for purposes of pricing purchase and 
redemption orders is determined independently of the net asset 
values of the shares of the Trust's other investment portfolios. 

Other Matters

	Fund shares are sold and redeemed without charge by the 
Fund. Institutional investors purchasing or holding Fund shares 
for their customer accounts may charge customers fees for cash 
management and other services provided in connection with their 
accounts. A customer should, therefore, consider the terms of its 
account with an institution before purchasing Fund shares. An 
institution purchasing or redeeming Fund shares on behalf of its 
customers is responsible for transmitting orders to Lehman 
Brothers in accordance with its customer agreements. 

DIVIDENDS

	

	Investors of the Fund are entitled to dividends and 
distributions arising only from the net investment income and 
capital gains, if any, earned on investments held by the Fund. The 
Fund's net investment income is declared daily as a dividend to 
shares held of record at the close of business on the day of 
declaration. Shares begin accruing dividends on the day the 
purchase order for the shares is executed and continue to accrue 
dividends through, and including, the day before the redemption 
order for the shares is executed. Dividends are paid monthly by 
wire transfer, within five business days after the end of the 
month or within five business days after a redemption of all of an 
investor's shares of a particular class. The Fund does not expect 
to realize net long-term capital gains. 

	Dividends are determined in the same manner and are paid in 
the same amount for each Fund share, except that Class B and 
Class C shares bear all the expense of fees paid to Service 
Organizations. As a result, at any given time, the net yield on 
Class B and Class C shares will be .25% and .35%, respectively, 
lower than the net yield on Class A shares. 

	Institutional shareholders may elect to have their dividends 
reinvested in additional full and fractional shares of the same 
class of shares with respect to which such dividends are declared 
at the net asset value of such shares on the payment date. 
Reinvested dividends receive the same tax treatment as dividends 
paid in cash. Such election, or any revocation thereof, must be 
made in writing to the Fund's Distributor, at 260 Franklin Street, 
15th Floor, Boston, Massachusetts 02110-9624, and will become 
effective after its receipt by the Distributor, with respect to 
dividends paid. 

	The Shareholder Services Group, Inc. ("TSSG"), as Transfer 
Agent, will send each investor or its authorized representative an 
annual statement designating the amount of any dividends and 
capital gains distributions, if any, made during each year and 
their federal tax qualification. 

TAXES

	

	The Fund qualified in its last taxable year and intends to 
qualify in future years as a "regulated investment company" under 
the Internal Revenue Code of 1986, as amended (the "Code"). A 
regulated investment company is exempt from federal income tax on 
amounts distributed to its investors. 

	Qualification as a regulated investment company under the 
Code for a taxable year requires, among other things, that the 
Fund distribute to its investors at least 90% of its investment 
company taxable income for such year. In general, the Fund's 
investment company taxable income will be its taxable income 
(including dividends and short-term capital gains, if any) subject 
to certain adjustments and excluding the excess of any net 
long-term capital gain for the taxable year over the net 
short-term capital loss, if any, for such year. The Fund intends 
to distribute substantially all of its investment company taxable 
income each year. Such distributions will be taxable as ordinary 
income to Fund investors who are not currently exempt from federal 
income taxes, whether such income is received in cash or 
reinvested in additional shares. It is anticipated that none of 
the Fund's distributions will be eligible for the dividends 
received deduction for corporations. The Fund does not expect to 
realize long-term capital gains and, therefore, does not 
contemplate payment of any "capital gain dividends" as described 
in the Code. 

	Dividends declared in October, November or December of any 
year payable to investors of record on a specified date in such 
months will be deemed to have been received by the investors and 
paid by the Fund on December 31 of such year in the event such 
dividends are actually paid during January of the following year. 

	Investors will be advised at least annually as to the 
federal income tax status of distributions made to them each year. 

	The foregoing discussion is only a brief summary of some of 
the important federal tax considerations generally affecting the 
Fund and its investors. No attempt is made to present a detailed 
explanation of the federal, state or local income tax treatment of 
the Fund or its investors, and this discussion is not intended as 
a substitute for careful tax planning. Accordingly, potential 
investors in the Fund should consult their tax advisers with 
specific reference to their own tax situation. 

MANAGEMENT OF THE FUND

	The business and affairs of the Fund are managed under the 
direction of the Trust's Board of Trustees. The Trustees approve 
all significant agreements between the Trust and the persons or 
companies that furnish services to the Fund, including agreements 
with its Distributor, Investment Adviser, Administrator, Custodian 
and Transfer Agent. The day-to-day operations of the Fund are 
delegated to the Fund's Investment Adviser and Administrator. The 
Statement of Additional Information relating to the Fund contains 
general background information regarding each Trustee and 
executive officer of the Trust. 

Distributor

	Lehman Brothers, located at 3 World Financial Center, New 
York, New York 10285, is the Distributor of the Fund's shares. 
Lehman Brothers is a wholly-owned subsidiary of Lehman Brothers 
Holdings Inc. ("Holdings"). Prior to May 31, 1994, all of the 
issued and outstanding common stock (representing 92% of the 
voting stock) of Holdings was held by American Express Company. On 
May 31, 1994, American Express distributed to holders of common 
stock of American Express all outstanding shares of common stock 
of Holdings. As of May 31, 1994, Nippon Life Insurance Company 
owned 11.2% of the outstanding voting securities of Holdings. 
Lehman Brothers, a leading full service investment firm, meets the 
diverse financial needs of individuals, institutions and 
governments around the world. Lehman Brothers has entered into a 
Distribution Agreement with the Trust pursuant to which it has the 
responsibility for distributing shares of the Fund. 

Investment Adviser_Lehman Brothers Global Asset Management Inc.

	Lehman Brothers Global Asset Management Inc. ("LBGAM"), 
located at 3 World Financial Center, New York, New York 10285, 
serves as the Fund's Investment Adviser. LBGAM is a wholly owned 
subsidiary of Holdings. LBGAM, together with the other Lehman 
Brothers investment advisory affiliates serves as Investment 
Adviser to investment companies and private accounts and has 
assets under management of approximately $15 billion as of March 
31, 1994. 

	As Investment Adviser to the Fund, LBGAM will among other 
things, participate in the formulation of the Fund's investment 
policies, analyze economic trends affecting the Fund and monitor 
and evaluate the Fund's investment objective and policies and the 
Fund's investment performance. For its services LBGAM is entitled 
to receive a monthly fee from the Fund at the annual rate of .10% 
of the value of the Fund's average daily net assets. For the 
period February 8, 1993 (commencement of operations) to 
January 31, 1994, LBGAM received no advisory fees from the Fund.

Administrator and Transfer Agent_The Shareholder Services 
Group, Inc.

	The Shareholder Services Group, Inc. ("TSSG"), located at 
One Exchange Place, 53 State Street Boston, Massachusetts 02109, 
serves as the Fund's Administrator and Transfer Agent. TSSG is a 
wholly owned subsidiary of First Data Corporation. As 
Administrator, TSSG calculates the net asset value of the Fund's 
shares and generally assists in all aspects of the Fund's 
administration and operation. As compensation for TSSG's services 
as Administrator, TSSG is entitled to receive from the Fund a 
monthly fee at the annual rate of .10% of the value of the Fund's 
average daily net assets. TSSG is also entitled to receive a fee 
from the Fund for its services as Transfer Agent. TSSG pays Boston 
Safe, the Fund's Custodian, a portion of its monthly 
administration fee for custody services rendered to the Fund. 
Custodian_Boston Safe Deposit and Trust Company

	Boston Safe, a wholly owned subsidiary of The Boston 
Company, Inc., located at One Boston Place, Boston, Massachusetts 
02108, serves as the Fund's Custodian. 

Service Organizations

	Financial institutions, such as banks, savings and loan 
associations and other such institutions ("Service Organizations") 
and/or institutional customers of Service Organizations may 
purchase Class B or Class C shares. These shares are identical in 
all respects to Class A shares except that they bear the fees 
described below and enjoy certain exclusive voting rights on 
matters relating to these fees. The Fund will enter into an 
agreement with each Service Organization whose customers 
("Customers") are the beneficial owners of Class B or Class C 
shares that requires the Service Organization to provide certain 
services to Customers in consideration of the Fund's payment of 
service fees at the annual rate of .25% or .35%, respectively, of 
the average daily net asset value of the respective Class 
beneficially owned by Customers. Such services, which are 
described more fully in the Statement of Additional Information 
under "Management of the Fund_Service Organizations," may include 
aggregating and processing purchase and redemption requests from 
Customers and placing net purchase and redemption orders with 
Lehman Brothers; processing dividend payments from the Fund on 
behalf of Customers; providing information periodically to 
Customers showing their positions in shares; arranging for bank 
wires; responding to Customer inquiries relating to the services 
provided by the Service Organization and handling correspondence; 
acting as shareholder of record and nominee; and providing 
reasonable assistance in connection with the distribution of 
shares to Customers. Services provided with respect to Class B 
shares will generally be more limited than those provided with 
respect to Class C shares. Under the terms of the agreements, 
Service Organizations are required to provide to their Customers a 
schedule of any fees that they may charge Customers in connection 
with their investments in Class B or Class C shares. Class A 
shares are sold to financial institutions that have not entered 
into servicing agreements with the Fund in connection with their 
investments. A salesperson and any other person entitled to 
receive compensation for selling or servicing shares of the Fund 
may receive different compensation for selling or servicing one 
Class of shares over another Class. 

Expenses

	The Fund bears all its own expenses. The Fund's expenses 
include taxes, interest, fees and salaries of the Trust's trustees 
and officers who are not directors, officers or employees of the 
Fund's service contractors, Securities and Exchange Commission 
fees, state securities qualification fees, costs of preparing and 
printing prospectuses for regulatory purposes and for distribution 
to investors, advisory and administration fees, charges of the 
custodian, transfer agent and dividend disbursing agent, Service 
Organization fees, certain insurance premiums, outside auditing 
and legal expenses, costs of shareholder reports and shareholder 
meetings and any extraordinary expenses. The Fund also pays for 
brokerage fees and commissions (if any) in connection with the 
purchase and sale of portfolio securities. In order to maintain a 
competitive expense ratio during 1994, LBGAM and TSSG have agreed 
voluntarily to  reimburse the Fund if and to the extent that the 
Fund's total operating expenses (other than taxes, interest, 
brokerage fees and commissions, Rule 12b-1 fees under the 1940 Act 
and extraordinary expenses) exceed .16% of average daily net 
assets through December 31, 1994. The Investment Adviser and 
Administrator intend to continue voluntarily to waive fees to the 
extent necessary to maintain an annualized expense ratio at a 
level no greater than .18% of average daily net assets thereafter. 
This voluntary reimbursement will not be changed unless investors 
are provided at least 60 days' advance notice. In addition, these 
service providers have agreed to reimburse the Fund to the extent 
required by applicable state law for certain expenses that are 
described in the Statement of Additional Information relating to 
the Fund. Any fees charged by Service Organizations or other 
institutional investors to their customers in connection with 
investments in Fund shares are not reflected in the Fund's 
expenses. 
May 31, 1994



YIELDS From time to time the "yields" and "effective yields" for 
Class A, Class B and Class C shares may be quoted in 
advertisements or in reports to investors. Yield quotations are 
computed separately for each Class of shares. The "yield" quoted 
in advertisements for a particular class or sub-class of shares 
refers to the income generated by an investment in such shares 
over a specified period (such as a seven-day period) identified in 
the advertisement. This income is then "annualized;" that is, the 
amount of income generated by the investment during that period is 
assumed to be generated each such period over a 52-week or 
one-year period and is shown as a percentage of the investment. 
The "effective yield" is calculated similarly but, when 
annualized, the income earned by an investment in a particular 
class or sub-class is assumed to be reinvested. The "effective 
yield" will be slightly higher than the "yield" because of the 
compounding effect of this assumed reinvestment. 

	The Fund's yields may be compared to those of other mutual 
funds with similar objectives, to other relevant indices, or to 
rankings prepared by independent services or other financial or 
industry publications that monitor the performance of mutual 
funds. For example, such data are reported in national financial 
publications such as IBC/Donoghue's Money Fund Report, The Wall 
Street Journal and The New York Times, reports prepared by Lipper 
Analytical Service, Inc. and publications of a local or regional 
nature. 

	The Fund's yield figures for a Class of shares represent 
past performance, will fluctuate and should not be considered as 
representative of future results. The yield of any investment is 
generally a function of portfolio quality and maturity, type of 
investment and operating expenses. Since holders of Class B or 
Class C shares bear the service fees for services provided by 
Service Organizations, the net yield on such shares can be 
expected at any given time to be lower than the net yield on 
Class A shares. Any fees charged by Service Organizations or other 
institutional investors directly to their customers in connection 
with investments in Fund shares are not reflected in the Fund's 
expenses or yields. The methods used to compute the Fund's yields 
are described in more detail in the Statement of Additional 
Information. Investors may call 1-800-238-2560 (Class A shares 
code: 001; Class B shares code: 101; Class C shares code: 201) to 
obtain current yield information. 

DESCRIPTION OF SHARES The Trust is a Massachusetts business trust 
established on November 25, 1992. 

	The Trust's Declaration of Trust authorizes the Board of 
Trustees to issue an unlimited number of full and fractional 
shares of beneficial interest in the Trust and to classify or 
reclassify any unissued shares into one or more additional classes 
of shares. The Trust is an open-end management investment company, 
which offers thirteen portfolios: Prime Money Market Fund 
(Class A, Class B and Class C), Prime Value Money Market Fund 
(Class A, Class B, Class C and Class D), Government Obligations 
Money Market Fund (Class A, Class B, Class C and Class D), 100% 
Government Obligations Money Market Fund (Class A, Class B and 
Class C), Treasury Instruments Money Market Fund (Class A, Class B 
and Class C), Treasury Instruments Money Market Fund II (Class A, 
Class B and Class C), 100% Treasury Instruments Money Market Fund 
(Class A, Class B and Class C), Tax-Free Money Market Fund 
(Class A, Class B and Class C), Municipal Money Market Fund 
(Class A, Class B, Class C and Class D), California Municipal 
Money Market Fund (Class A, Class B and Class C), New York 
Municipal Money Market Fund (Class A, Class B and Class C), 
Floating Rate U.S. Government Fund (Premier and Select Shares) and 
Short Duration U.S. Government Fund (Premier and Select Shares). 
Shares of the New York Municipal Money Market Fund are not 
currently sold to the public. The Declaration of Trust further 
authorizes the Trustees to classify or reclassify any class of 
shares into one or more sub-classes. 

	The Trust does not presently intend to hold annual meetings 
of shareholders except as required by the 1940 Act or other 
applicable law. The Trust will call a meeting of shareholders for 
the purpose of voting upon the question of removal of a member of 
the Board of Trustees upon written request of shareholders owning 
at least 10% of the outstanding shares of the Trust entitled to 
vote. 

	Each Fund share represents an equal, proportionate interest 
in the assets belonging to the Fund. Each share, which has a par 
value of $.001, has no preemptive or conversion rights. When 
issued for payment as described in this Prospectus, Fund shares 
will be fully paid and non- assessable. 

	Holders of the Fund's shares will vote in the aggregate and 
not by class on all matters, except where otherwise required by 
law and except that only Class B or Class C shares, as the case 
may be, will be entitled to vote on matters submitted to a vote of 
shareholders pertaining to the Fund's arrangements with Service 
Organizations with respect to the relevant Class. Further, 
shareholders of the Fund and of the Trust's other portfolios will 
vote in the aggregate and not by portfolio except as otherwise 
required by law or when the Board of Trustees determines that the 
matter to be voted upon affects only the interests of the 
shareholders of a particular portfolio. (See the Statement of 
Additional Information under "Additional Description Concerning 
Fund Shares" for examples where the 1940 Act requires voting by 
portfolio.) Shareholders of the Trust are entitled to one vote for 
each full share held (irrespective of class or portfolio) and 
fractional votes for fractional shares held. Voting rights are not 
cumulative; and, accordingly, the holders of more than 50% of the 
aggregate shares of the Trust may elect all of the Trustees. 

	For information concerning the redemption of Fund shares and 
possible restrictions on their transferability, see "Purchase and 
Redemption of Shares." 

	THIS PROSPECTUS AND THE STATEMENT OF ADDITIONAL INFORMATION 
INCORPORATED HEREIN RELATE PRIMARILY TO THE FUND AND DESCRIBE ONLY 
THE INVESTMENT OBJECTIVE AND POLICIES, OPERATIONS, CONTRACTS AND 
OTHER MATTERS RELATING TO THE FUND. INVESTORS WISHING TO OBTAIN 
SIMILAR INFORMATION REGARDING THE TRUST'S OTHER PORTFOLIOS MAY 
OBTAIN SEPARATE PROSPECTUSES DESCRIBING THEM BY CONTACTING LEHMAN 
BROTHERS AT 1-800-368-5556. 

TABLE OF CONTENTS


Page

LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
Prime Money Market Fund
Prime Value Money Market Fund
Government Obligations Money Market Fund
100% Government Obligations Money Market Fund
Treasury Instruments Money Market Fund
Treasury Instruments Money Market Fund II
100% Treasury Instruments Money Market Fund
Municipal Money Market Fund
Tax-Free Money Market Fund
California Municipal Money Market Fund
New York Municipal Money Market Fund



_________

Floating Rate U.S. Government Fund
Short Duration U.S. Government Fund

_________

No person has been authorized to give any information or to make 
any representations not contained in this Prospectus, or in the 
Fund's Statement of Additional Information incorporated herein by 
reference, in connection with the offering made by this Prospectus 
and, if given or made, such information or representations must 
not be relied upon as having been authorized by the Trust or its 
Distributor. This Prospectus does not constitute an offering by 
the Trust or by the Distributor in any jurisdiction in which such 
offering may not lawfully be made.
TABLE OF CONTENTS


P
a
g
e


	Background and Expense Information
2


	Financial Highlights
3


	Investment Objective and Policies
4


	Purchase and Redemption of Shares
6


	Dividends
8


	Taxes
9


	Management of the Fund
9


	Yields
1
2


	Description of Shares
1
2



Prime Money
Market Fund



PROSPECTUS
May 31, 1994

LEHMAN BROTHERS

THIS PROSPECTUS AND THE STATEMENT OF ADDITIONAL INFORMATION 
INCORPORATED HEREIN RELATE PRIMARILY TO THE FUND AND DESCRIBE ONLY 
THE INVESTMENT OBJECTIVE AND POLICIES, OPERATIONS, CONTRACTS AND 
OTHER MATTERS RELATING TO THE FUND. INVESTORS WISHING TO OBTAIN 
SIMILAR INFORMATION REGARDING THE TRUST'S OTHER PORTFOLIOS MAY 
OBTAIN SEPARATE PROSPECTUSES DESCRIBING THEM BY CONTACTING LEHMAN 
BROTHERS AT 1-800-368-5556.








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