NUVEEN TAX EXEMPT UNIT TRUST SERIES 809
497, 1995-06-28
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<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     INTERMEDIATE
     INSURED
     TRUST 80
 
            Estimated Current Return
            First
            Year: 4.49% to 4.63%
            Subsequent
            Years: 4.53% to 4.67%
            as of 06/26/95
 
            Estimated Long Term Return
            4.78% to 4.92%
             50,000 units in a
             diversified $5,000,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  67093J 139 Monthly Payment Option
                  67093J 147 Quarterly Payment Option
                  67093J 154 Semi-Annual Payment Option
 
                  Registered in all states
                    John Nuveen & Co. Incorporated
                    Investment Bankers
 
<TABLE>
<S>                           <C>
Chicago:                      Atlanta
333 W. Wacker Dr.             Austin
Chicago, Illinois 60606       Boca Raton
Telephone: 312.917.7700       Boston
                              Columbus
New York:                     Dallas/Ft. Worth
Swiss Bank Tower              Irvine
10 East 50th Street           Philadelphia
New York, New York 10022      Phoenix
Telephone: 212.207.2000       San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--INSURED, INTERMEDIATE INSURED TRUST 80
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT JUNE 27, 1995
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                             Ratings
                                                                                    Optional         -----------------------
  Aggregate            Name of Issuer and Title of Issue Represented               Redemption        Standard
  Principal               by Sponsor's Contracts to Purchase Bonds                 Provisions        & Poor's       Moody's
  <C>       <C> <S>                                                              <C>                 <C>           <C>
  --------------------------------------------------------------------------------------------------------------------------
  $  500,000    Fresno County Financing Authority (California), Solid Waste        No Optional          AAA           Aaa
                  Revenue Bonds, Series 1995 (American Avenue Landfill                Call
                  Project), 5.30% Due 5/15/05. (When issued.)
     500,000    City of Boca Raton, Florida, Beach Acquisition Revenue             No Optional          AAA           Aaa
                  Bonds, Series 1995, 4.60% Due 1/1/05.                               Call
     500,000    City of Jacksonville, Florida, Sales Tax Revenue Bonds,            No Optional          AAA           Aaa
                  Series 1995 (River City Renaissance Project), 5.00% Due             Call
                  10/1/05. (When issued.)
     500,000    City of Chicago (Illinois), General Obligation Bonds,              No Optional          AAA           Aaa
                  Refunding Series 1993B, 4.80% Due 1/1/05.                           Call
     250,000    Washington Suburban Sanitary District, Maryland (Montgomery        No Optional          AAA           Aaa
                  and Prince George's Counties, Maryland), Water Supply               Call
                  Bonds of 1995, 4.75% Due 6/1/05. (General Obligation
                  Bonds.)
     500,000    Reeths-Puffer Schools, County of Muskegon, State of                No Optional          AAA           Aaa
                  Michigan, 1995 School Building and Site and Refunding               Call
                  Bonds, 5.10% Due 5/1/05. (General Obligation Bonds.) (When
                  issued.)
     500,000    Nebraska Public Power District, Power Supply System Revenue        2005 at 101          AAA           Aaa
                  Bonds, 1995 Series A, 5.00% Due 1/1/06.
     500,000    Metropolitan Transportation Authority (New York), Transit          No Optional          AAA           Aaa
                  Facilities 1987 Service Contract Bonds, Series 7, 5.30%             Call
                  Due 7/1/05.
     500,000    New York City (New York), Municipal Water Finance Authority,       2004 at 101          AAA           Aaa
                  Water and Sewer System Revenue Bonds, Fixed Rate Fiscal
                  1994 Series B, 5.20% Due 6/15/05.
     500,000    Central Kitsap School District No. 401, Kitsap County,             No Optional          AAA           Aaa
                  Washington, Unlimited Tax General Obligation Bonds, 1995,           Call
                  4.90% Due 12/1/05.
     250,000    Washington Public Power Supply System, Nuclear Project No. 2       No Optional          AAA           Aaa
                  Refunding Revenue Bonds, Series 1990C, 0.00% Due 7/1/05.            Call
                  (Original issue discount bonds delivered on or about
                  November 15, 1990 at a price of 33.114% of principal
                  amount.)
  ----------
  $5,000,000
  ----------
  ----------
</TABLE>
    
 
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION    The sales charges/volume discounts below
apply on all concurrent purchases of any Nuveen trust units, unless any such
purchases are made by a class of investors for which a separate sales charge is
applicable as described more fully in the Prospectus. Estimated Current Return
equals net income divided by offering price. Estimated Long Term Return
represents an average of the yields to maturity (or call) of the Bonds in the
Trust adjusted to reflect expenses and sales charges.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                              Estimated Current Return (2)
          AMOUNT PURCHASED                         Public      -----------------------------------------------------------
- -------------------------------------  Sales      Offering         Monthly           Quarterly            Semi-Annual
     Units              Dollars        Charge     Price (1)        Payment            Payment               Payment
- ----------------  -------------------  ------    -----------   ---------------    ---------------    ---------------------
<S>               <C>                  <C>       <C>           <C>       <C>      <C>       <C>      <C>       <C>
50-499                 $5,000-$49,999   3.90 %   $    100.61     (4.49%)  4.53%     (4.52%)  4.56%     (4.54%)  4.58%
500-999                 50,000-99,999   3.70          100.40     (4.50)   4.54      (4.53)   4.57      (4.55)   4.59
1,000-2,499           100,000-249,999   3.50          100.20     (4.51)   4.55      (4.54)   4.58      (4.56)   4.60
2,500-4,999           250,000-499,999   3.25           99.94     (4.52)   4.56      (4.56)   4.59      (4.57)   4.61
5,000-9,999           500,000-999,999   3.00           99.68     (4.53)   4.57      (4.57)   4.60      (4.59)   4.62
10,000-24,999     1,000,000- 2,499,999  2.75           99.42     (4.55)   4.58      (4.58)   4.61      (4.60)   4.63
25,000-49,999     2,500,000- 4,999,999  2.50           99.17     (4.56)   4.59      (4.59)   4.63      (4.61)   4.64
50,000 and over    5,000,000 and over   2.00           98.66     (4.58)   4.62      (4.61)   4.65      (4.63)   4.67
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                         Estimated Long Term Return (3)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   3.90 %   $    100.61          4.78%            4.81%            4.82%
500-999                 50,000-99,999   3.70          100.40          4.79             4.82             4.83
1,000-2,499           100,000-249,999   3.50          100.20          4.80             4.83             4.84
2,500-4,999           250,000-499,999   3.25           99.94          4.81             4.84             4.85
5,000-9,999           500,000-999,999   3.00           99.68          4.82             4.85             4.87
10,000-24,999     1,000,000- 2,499,999  2.75           99.42          4.83             4.86             4.88
25,000-49,999     2,500,000- 4,999,999  2.50           99.17          4.85             4.88             4.90
50,000 and over    5,000,000 and over   2.00           98.66          4.87             4.90             4.92
</TABLE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
(1) As of the business day prior to the Date of Deposit. Units are offered at
    the Public Offering Price plus accrued interest.
(2) All figures as of the business day prior to the Date of Deposit. Figures in
    brackets represent the current return. The first year's estimated current
    returns are slightly lower than those for subsequent years because a portion
    of the monies received in the first year only will be treated as a return of
    principal due to the inclusion in the portfolio of "when issued" or other
    Bonds having delivery dates after the date of settlement for a purchase made
    on the Date of Deposit.
(3) In contrast to Estimated Current Return, Estimated Long Term Return reflects
    the amortization of premium or accretion of discount, if any, on the bonds
    in the Trust's portfolio.
 
- --------------------------------------------------------------------------------
 
REINVESTMENT OPTIONS   Specify automatic reinvestment of trust income, with no
sales charge, to earn compounded dividends with Nuveen mutual funds.
- --------------------------------------------------------------------------------
 
INTEREST DISTRIBUTIONS TO UNITHOLDERS   Unitholders may elect to have interest
distributions made on a monthly, quarterly, or semi-annual basis. Record Dates
are May 1 and November 1 for semi-annual distributions; February 1, May 1,
August 1 and November 1 for quarterly distributions; and the first of each month
for monthly distributions. Details of interest distributions per unit under the
various plans appear in the following table based upon estimated net annual
interest income at the Date of Deposit:
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                          Normal
                                                                                                      Distributions
Intermediate Insured Trust                        1995                             1996                 per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>
- ----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................        8/1           11/1            2/1            5/1
Distribution Date.....................       8/15          11/15           2/15           5/15
- --------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .4301(1)                                                  $  4.5548
                                                          --------  $.3795 every month  --------
Quarterly Distribution Plan...........  $   .4301(1)   $  1.1466(2)   $  1.1466      $  1.1466        $  4.5868
Semi-Annual Distribution Plan.........  $   .4301(1)   $  1.1511(3)                  $  2.3022        $  4.6058
- --------------------------------------------------------------------------------------------------------------------
<FN>
  * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1,
    August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) Regular 3-month distribution.
</TABLE>
    
<PAGE>
   
<TABLE>
<S>         <C>
(3) The second distribution under the semi-annual distribution plan represents a 3-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
    
 
+ Interest for Unitholders of this series began to accrue as of the Date of
Deposit. Units purchased on the Date of Deposit will have $.04 of accrued
interest that will be added to the Public Offering Price on the Settlement Date.
After provision for expenses of the Fund, the daily rate of accrual from the
Date of Deposit to the first Record Date is $.01265 per unit per day.
Consequently, on the first Record Date (08/01/95), accrued interest will total
$0.4301 per unit for the 34-day period. All interest accrued from the Date of
Deposit to the first Record Date, less expenses, will be distributed on the
first Distribution Date to Unitholders of Record as of the first Record Date.
The first payment to all Unitholders of Record on 08/01/95 is $.4301 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01265              Quarterly - $0.01274
                             Semi-Annual - $0.01279
This daily rate of accrual, and the annual distributions shown above, will
remain the same as long as the portfolio size and composition remain the same.
 
- --------------------------------------------------------------------------------
<PAGE>
- -------------------------------------------------
 
DIVERSIFICATION OF PORTFOLIO INCOME
 
There are 11 Tax-exempt bond issues in this trust; this diversified portfolio
yields current income from issuers in 8 states.
- -------------------------------------------------------
<TABLE>
<CAPTION>
                   Percent
                   of Total
                   Income
<S>                    <C>        <C>
- ------------------------
                                  %
California                  11.1
Florida                     20.2
Illinois                    10.1
Maryland                     5.0
 
<CAPTION>
                   Percent
                   of Total
                   Income
- ------------------------
<S>                    <C>        <C>
                                  %
Michigan                    10.7
Nebraska                    10.5
New York                    22.1
Washington                  10.3
</TABLE>
 
- -------------------------------------------------
 
AVERAGE PORTFOLIO LIFE The average maturity
of portfolio bonds is 10.0 years.
 
<TABLE>
<CAPTION>
Year Bonds Mature                        Amount      Percent
- -------------------------------------  ----------  -----------
<S>                                    <C>         <C>
2005.................................       4,500        90.0%
2006.................................         500        10.0
</TABLE>
 
- -------------------------------------------------
 
BONDS INSURED BY MBIA   Each bond in this Nuveen Insured series has been
insured* by the Municipal Bond Investors Assurance Corporation, which guarantees
timely payments of principal and interest. Premium payments have been fully paid
by the Date of Deposit.
 
- -------------------------------------------------
 
CALL PROTECTION   Bonds are first subject to optional redemption by the issuers
in the years and at the prices shown under the Redemption Provisions column in
the Schedule of Investments. Unless otherwise stated, in subsequent years, bonds
are redeemable at declining prices, but not usually below par value. Some issues
or some portions of issues may also be subject to sinking fund redemption or
extraordinary redemption without premium prior to the dates shown.
 
- -------------------------------------------------
 
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND
INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
- -------------------------------------------------
 
* Insurance relates specifically to the bonds and not to the units or to the
  market value of units. Terms of the insurance are more fully described in the
  prospectus. No representation is made as to the insurer's ability to meet its
  commitments. See Section 5 of the prospectus for details.
 
- -------------------------------------------------------
 
FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION, INCLUDING CHARGES AND
EXPENSES, ON THIS NUVEEN TAX-EXEMPT UNIT TRUST AND ANY OTHER NUVEEN FUND, CALL
YOUR BROKER . . . OR NUVEEN AT
 
                                 1-800-257-8787
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
 
809
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     GEORGIA
     INSURED
     TRUST 45
 
            Estimated Current Return
            5.24% to 5.45%
            as of 06/26/95
 
            Estimated Long Term Return
            5.31% to 5.52%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  67101M 645 Monthly Payment Option
                  67101M 652 Quarterly Payment Option
                  67101M 660 Semi-Annual Payment Option
 
                  Registered in Georgia
                    John Nuveen & Co. Incorporated
                    Investment Bankers
 
<TABLE>
<S>                           <C>
Chicago:                      Atlanta
333 W. Wacker Dr.             Austin
Chicago, Illinois 60606       Boca Raton
Telephone: 312.917.7700       Boston
                              Columbus
New York:                     Dallas/Ft. Worth
Swiss Bank Tower              Irvine
10 East 50th Street           Philadelphia
New York, New York 10022      Phoenix
Telephone: 212.207.2000       San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--INSURED, GEORGIA INSURED TRUST 45
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT JUNE 27, 1995
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                             Ratings
                                                                                    Optional         -----------------------
  Aggregate            Name of Issuer and Title of Issue Represented               Redemption        Standard
  Principal               by Sponsor's Contracts to Purchase Bonds                 Provisions        & Poor's       Moody's
  <C>       <C> <S>                                                              <C>                 <C>           <C>
  --------------------------------------------------------------------------------------------------------------------------
  $  450,000    Municipal Electric Authority of Georgia, Power Revenue             2004 at 100          AAA           Aaa
                  Bonds, Series EE, 5.50% Due 1/1/26. (Original issue
                  discount bonds delivered on or about June 1, 1994 at a
                  price of 87.008% of principal amount.)
     245,000    Metropolitan Atlanta Rapid Transit Authority (Georgia),            2003 at 102          AAA           Aaa
                  Sales Tax Revenue Bonds (Second Indenture Series), Series
                  1993A, 5.125% Due 7/1/19.
     500,000    Urban Residential Finance Authority of the City of Atlanta,        2005 at 102          AAA           Aaa
                  Georgia, Dormitory Facility Refunding Revenue Bonds
                  (Morehouse College Project), Series 1995, 5.75% Due
                  12/1/14.
     500,000    City of Atlanta, Georgia, Water and Sewerage Revenue Bonds,        2004 at 102          AAA           Aaa
                  Series 1993, 5.00% Due 1/1/15.
     500,000    City of Cumming (Georgia), Water and Sewerage Revenue              2003 at 102          AAA           Aaa
                  Refunding and Improvement Bonds, Series 1994, 6.25% Due
                  12/1/24.
     500,000    Hospital Authority of Fulton County (Georgia), Refunding           2004 at 102          AAA           Aaa
                  Revenue Anticipation Certificates (Northside Hospital
                  Project), Series 1993A, 5.125% Due 10/1/16. (Original
                  issue discount bonds delivered on or about February 2,
                  1994 at a price of 94.795% of principal amount.)
     345,000    The Fulton-DeKalb Hospital Authority (Georgia), Revenue            2003 at 102          AAA           Aaa
                  Refunding Certificates, Series 1993, 5.50% Due 1/1/20.
                  (Original issue discount bonds delivered on or about June
                  15, 1993 at a price of 94.499% of principal
                  amount.)(General Obligation Bonds.)
     460,000    Hospital Authority of Gordon County (Georgia), Revenue             2005 at 102          AAA           Aaa
                  Anticipation Certificates, Series 1995 (Adventist Health
                  System/Sunbelt Obligated Group), 5.75% Due 11/15/25.
  ----------
  $3,500,000
  ----------
  ----------
</TABLE>
    
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION    The sales charges/volume discounts below
apply on all concurrent purchases of any Nuveen trust units, unless any such
purchases are made by a class of investors for which a separate sales charge is
applicable as described more fully in the Prospectus. Estimated Current Return
equals net income divided by offering price. Estimated Long Term Return
represents an average of the yields to maturity (or call) of the Bonds in the
Trust adjusted to reflect expenses and sales charges.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                          Estimated Current Return (2)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $    101.35          5.24%            5.27%            5.29%
500-999                 50,000-99,999   4.75          101.19          5.25             5.28             5.30
1,000-2,499           100,000-249,999   4.50          100.92          5.26             5.29             5.31
2,500-4,999           250,000-499,999   4.25          100.66          5.27             5.31             5.32
5,000-9,999           500,000-999,999   3.50           99.88          5.31             5.35             5.37
10,000-24,999     1,000,000- 2,499,999  3.00           99.36          5.34             5.37             5.39
25,000-49,999     2,500,000- 4,999,999  2.50           98.85          5.37             5.40             5.42
50,000 and over    5,000,000 and over   2.00           98.35          5.40             5.43             5.45
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                         Estimated Long Term Return (3)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $    101.35          5.31%            5.34%            5.35%
500-999                 50,000-99,999   4.75          101.19          5.31             5.34             5.36
1,000-2,499           100,000-249,999   4.50          100.92          5.33             5.36             5.38
2,500-4,999           250,000-499,999   4.25          100.66          5.34             5.37             5.39
5,000-9,999           500,000-999,999   3.50           99.88          5.39             5.41             5.43
10,000-24,999     1,000,000- 2,499,999  3.00           99.36          5.41             5.44             5.46
25,000-49,999     2,500,000- 4,999,999  2.50           98.85          5.44             5.47             5.49
50,000 and over    5,000,000 and over   2.00           98.35          5.47             5.50             5.52
</TABLE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
(1) As of the business day prior to the Date of Deposit. Units are offered at
    the Public Offering Price plus accrued interest.
(2) All figures as of the business day prior to Date of Deposit. The estimated
    current return for purchases made on such date will be as shown, as long as
    the portfolio size and composition remain the same.
(3) In contrast to Estimated Current Return, Estimated Long Term Return reflects
    the amortization of premium or accretion of discount, if any, on the bonds
    in the Trust's portfolio.
 
- --------------------------------------------------------------------------------
 
INTEREST DISTRIBUTIONS TO UNITHOLDERS   Unitholders may elect to have interest
distributions made on a monthly, quarterly, or semi-annual basis. Record Dates
are May 1 and November 1 for semi-annual distributions; February 1, May 1,
August 1 and November 1 for quarterly distributions; and the first of each month
for monthly distributions. Details of interest distributions per unit under the
various plans appear in the following table based upon estimated net annual
interest income at the Date of Deposit:
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                          Normal
                                                                                                      Distributions
Georgia Insured Trust                             1995                             1996                 per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>
- ----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................        8/1           11/1            2/1            5/1
Distribution Date.....................       8/15          11/15           2/15           5/15
- --------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5011(1)                                                  $  5.3081
                                                          --------  $.4422 every month  --------
Quarterly Distribution Plan...........  $   .5011(1)   $  1.3347(2)   $  1.3347      $  1.3347        $  5.3401
Semi-Annual Distribution Plan.........  $   .5011(1)   $  1.3392(3)                  $  2.6784        $  5.3591
- --------------------------------------------------------------------------------------------------------------------
<FN>
  * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1,
    August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) Regular 3-month distribution.
(3) The second distribution under the semi-annual distribution plan represents a 3-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
    
 
+ Interest for Unitholders of this series began to accrue as of the Date of
Deposit. Units purchased on the Date of Deposit will have $.04 of accrued
interest that will be added to the Public Offering Price on the Settlement Date.
After provision for expenses of the Fund, the daily rate of accrual from the
Date of Deposit to the first Record Date is $.01474 per unit per day.
Consequently, on the first Record Date (08/01/95), accrued interest will total
$0.5011 per unit for the 34-day period. All interest accrued from the Date of
Deposit to the first Record Date, less expenses, will be distributed on the
first Distribution Date to Unitholders of Record as of the first Record Date.
The first payment to all Unitholders of Record on 08/01/95 is $.5011 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01474              Quarterly - $0.01483
                             Semi-Annual - $0.01488
This daily rate of accrual, and the annual distributions shown above, will
remain the same as long as the portfolio size and composition remain the same.
 
- --------------------------------------------------------------------------------
 
                                                          809
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 24.8 years.
The first bond is scheduled to mature in December, 2014, with the last bond
maturity being January, 2026.
 
- -------------------------------------------------------
 
BONDS INSURED BY MBIA   Each bond in this Nuveen Insured series has been
insured* by the Municipal Bond Investors Assurance Corporation, which guarantees
timely payments of principal and interest. Premium payments have been fully paid
by the Date of Deposit.
 
- -------------------------------------------------------
 
CALL PROTECTION   Bonds are first subject to optional redemption by the issuers
in the years and at the prices shown under the Redemption Provisions column in
the Schedule of Investments. Unless otherwise stated, in subsequent years, bonds
are redeemable at declining prices, but not usually below par value. Some issues
or some portions of issues may also be subject to sinking fund redemption or
extraordinary redemption without premium prior to the dates shown.
 
- -------------------------------------------------------
 
NO CHARGE FOR REDEMPTION   The Trustee, United States Trust Company of New York,
will redeem units at net asset value. In addition, John Nuveen & Co.
Incorporated intends to maintain a secondary market for this Nuveen Tax-Exempt
Unit Trust. Inasmuch as all securities investments are subject to market price
fluctuation, net asset value at the time of redemption could be more or less
than the initial investment.
 
- -------------------------------------------------------
 
REINVESTMENT OPTIONS   Specify automatic reinvestment of trust income, with no
sales charge, to earn compounded dividends with Nuveen mutual funds.
 
- -------------------------------------------------------
 
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND
INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
- -------------------------------------------------------
 
* Insurance relates specifically to the bonds and not to the units or to the
  market value of units. Terms of the insurance are more fully described in the
  prospectus. No representation is made as to the insurer's ability to meet its
  commitments. See Section 5 of the prospectus for details.
 
- -------------------------------------------------------
 
FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION, INCLUDING CHARGES AND
EXPENSES, ON THIS NUVEEN TAX-EXEMPT UNIT TRUST AND ANY OTHER NUVEEN FUND, CALL
YOUR BROKER . . . OR NUVEEN AT
 
                                 1-800-257-8787
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     NEW YORK
     INSURED
     TRUST 237
 
            Estimated Current Return
            5.24% to 5.45%
            as of 06/26/95
 
            Estimated Long Term Return
            5.32% to 5.54%
             50,000 units in a
             diversified $5,000,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  67101K 409 Monthly Payment Option
                  67101K 417 Quarterly Payment Option
                  67101K 425 Semi-Annual Payment Option
 
                  Registered in New York, Connecticut & Florida
                    John Nuveen & Co. Incorporated
                    Investment Bankers
 
<TABLE>
<S>                           <C>
Chicago:                      Atlanta
333 W. Wacker Dr.             Austin
Chicago, Illinois 60606       Boca Raton
Telephone: 312.917.7700       Boston
                              Columbus
New York:                     Dallas/Ft. Worth
Swiss Bank Tower              Irvine
10 East 50th Street           Philadelphia
New York, New York 10022      Phoenix
Telephone: 212.207.2000       San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--INSURED, NEW YORK INSURED TRUST 237
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT JUNE 27, 1995
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                             Ratings
                                                                                    Optional         -----------------------
  Aggregate            Name of Issuer and Title of Issue Represented               Redemption        Standard
  Principal               by Sponsor's Contracts to Purchase Bonds                 Provisions        & Poor's       Moody's
  <C>       <C> <S>                                                              <C>                 <C>           <C>
  --------------------------------------------------------------------------------------------------------------------------
  $  750,000    The Port Authority of New York and New Jersey, Consolidated        2005 at 101          AAA           Aaa
                  Bonds, One Hundredth Series, 5.75% Due 6/15/30. (When
                  issued.)
     355,000    Dormitory Authority of the State of New York, Fordham              2004 at 102          AAA           Aaa
                  University, Insured Revenue Bonds, Series 1994, 5.75% Due
                  7/1/15.
     750,000    New York Local Government Assistance Corporation (A Public         2004 at 100          AAA           Aaa
                  Benefit Corporation of the State of New York), Series
                  1993D Bonds, 5.00% Due 4/1/23. (Original issue discount
                  bonds delivered on or about December 23, 1993 at a price
                  of 93.445% of principal amount.)
     145,000    New York State Medical Care Facilities Finance Agency,             2004 at 102          AAA           Aaa
                  Mental Health Services Facilities Improvement Revenue
                  Bonds, 1993 Series F Refunding, 5.25% Due 2/15/19.
                  (Original issue discount bonds delivered on or about
                  January 5, 1994 at a price of 93.77% of principal amount.)
     750,000    New York State Thruway Authority, General Revenue Bonds,           2005 at 102          AAA           Aaa
                  Series C, 6.00% Due 1/1/25.
     500,000    The City of New York, New York, General Obligation Bonds,          2003 at 101          AAA           Aaa
                  Fiscal 1994 Series C, 5.625% Due 10/1/12.                            1/2
     250,000    The City of New York, General Obligation Bonds, Fiscal 1994        2003 at 101          AAA           Aaa
                  Series B, 5.75% Due 8/15/14.                                         1/2
     750,000    New York City (New York), Municipal Water Finance Authority,       2004 at 101          AAA           Aaa
                  Water and Sewer System Revenue Bonds, Fixed Rate Fiscal
                  1994 Series B, 5.50% Due 6/15/19.
     750,000    Triborough Bridge and Tunnel Authority (New York), General         2004 at 100          AAA           Aaa
                  Purpose Revenue Bonds, Series 1994A, 4.75% Due 1/1/19.
                  (Original issue discount bonds delivered on or about
                  February 15, 1994 at a price of 93.225% of principal
                  amount.)
  ----------
  $5,000,000
  ----------
  ----------
</TABLE>
    
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION    The sales charges/volume discounts below
apply on all concurrent purchases of any Nuveen trust units, unless any such
purchases are made by a class of investors for which a separate sales charge is
applicable as described more fully in the Prospectus. Estimated Current Return
equals net income divided by offering price. Estimated Long Term Return
represents an average of the yields to maturity (or call) of the Bonds in the
Trust adjusted to reflect expenses and sales charges.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                          Estimated Current Return (2)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $    100.27          5.24%            5.27%            5.29%
500-999                 50,000-99,999   4.75          100.12          5.25             5.28             5.30
1,000-2,499           100,000-249,999   4.50           99.85          5.26             5.29             5.31
2,500-4,999           250,000-499,999   4.25           99.59          5.27             5.31             5.32
5,000-9,999           500,000-999,999   3.50           98.82          5.31             5.35             5.37
10,000-24,999     1,000,000- 2,499,999  3.00           98.31          5.34             5.37             5.39
25,000-49,999     2,500,000- 4,999,999  2.50           97.81          5.37             5.40             5.42
50,000 and over    5,000,000 and over   2.00           97.31          5.40             5.43             5.45
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                         Estimated Long Term Return (3)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $    100.27          5.32%            5.35%            5.37%
500-999                 50,000-99,999   4.75          100.12          5.32             5.36             5.38
1,000-2,499           100,000-249,999   4.50           99.85          5.34             5.38             5.40
2,500-4,999           250,000-499,999   4.25           99.59          5.35             5.39             5.41
5,000-9,999           500,000-999,999   3.50           98.82          5.39             5.43             5.45
10,000-24,999     1,000,000- 2,499,999  3.00           98.31          5.42             5.46             5.48
25,000-49,999     2,500,000- 4,999,999  2.50           97.81          5.45             5.49             5.51
50,000 and over    5,000,000 and over   2.00           97.31          5.48             5.52             5.54
</TABLE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
(1) As of the business day prior to the Date of Deposit. Units are offered at
    the Public Offering Price plus accrued interest.
(2) All figures as of the business day prior to Date of Deposit. The estimated
    current return for purchases made on such date will be as shown, as long as
    the portfolio size and composition remain the same.
(3) In contrast to Estimated Current Return, Estimated Long Term Return reflects
    the amortization of premium or accretion of discount, if any, on the bonds
    in the Trust's portfolio.
 
- --------------------------------------------------------------------------------
 
INTEREST DISTRIBUTIONS TO UNITHOLDERS   Unitholders may elect to have interest
distributions made on a monthly, quarterly, or semi-annual basis. Record Dates
are May 1 and November 1 for semi-annual distributions; February 1, May 1,
August 1 and November 1 for quarterly distributions; and the first of each month
for monthly distributions. Details of interest distributions per unit under the
various plans appear in the following table based upon estimated net annual
interest income at the Date of Deposit:
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                          Normal
                                                                                                      Distributions
New York Insured Trust                            1995                             1996                 per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>
- ----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................        8/1           11/1            2/1            5/1
Distribution Date.....................       8/15          11/15           2/15           5/15
- --------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .4957(1)                                                  $  5.2514
                                                          --------  $.4374 every month  --------
Quarterly Distribution Plan...........  $   .4957(1)   $  1.3203(2)   $  1.3203      $  1.3203        $  5.2834
Semi-Annual Distribution Plan.........  $   .4957(1)   $  1.3248(3)                  $  2.6496        $  5.3024
- --------------------------------------------------------------------------------------------------------------------
<FN>
  * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1,
    August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) Regular 3-month distribution.
(3) The second distribution under the semi-annual distribution plan represents a 3-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
    
 
+ Interest for Unitholders of this series began to accrue as of the Date of
Deposit. Units purchased on the Date of Deposit will have $.04 of accrued
interest that will be added to the Public Offering Price on the Settlement Date.
After provision for expenses of the Fund, the daily rate of accrual from the
Date of Deposit to the first Record Date is $.01458 per unit per day.
Consequently, on the first Record Date (08/01/95), accrued interest will total
$0.4957 per unit for the 34-day period. All interest accrued from the Date of
Deposit to the first Record Date, less expenses, will be distributed on the
first Distribution Date to Unitholders of Record as of the first Record Date.
The first payment to all Unitholders of Record on 08/01/95 is $.4957 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01458              Quarterly - $0.01467
                             Semi-Annual - $0.01472
This daily rate of accrual, and the annual distributions shown above, will
remain the same as long as the portfolio size and composition remain the same.
 
- --------------------------------------------------------------------------------
 
                                                          809
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 25.7 years.
The first bond is scheduled to mature in October, 2012, with the last bond
maturity being June, 2030.
 
- -------------------------------------------------------
 
BONDS INSURED BY MBIA   Each bond in this Nuveen Insured series has been
insured* by the Municipal Bond Investors Assurance Corporation, which guarantees
timely payments of principal and interest. Premium payments have been fully paid
by the Date of Deposit.
 
- -------------------------------------------------------
 
CALL PROTECTION   Bonds are first subject to optional redemption by the issuers
in the years and at the prices shown under the Redemption Provisions column in
the Schedule of Investments. Unless otherwise stated, in subsequent years, bonds
are redeemable at declining prices, but not usually below par value. Some issues
or some portions of issues may also be subject to sinking fund redemption or
extraordinary redemption without premium prior to the dates shown.
 
- -------------------------------------------------------
 
NO CHARGE FOR REDEMPTION   The Trustee, United States Trust Company of New York,
will redeem units at net asset value. In addition, John Nuveen & Co.
Incorporated intends to maintain a secondary market for this Nuveen Tax-Exempt
Unit Trust. Inasmuch as all securities investments are subject to market price
fluctuation, net asset value at the time of redemption could be more or less
than the initial investment.
 
- -------------------------------------------------------
 
REINVESTMENT OPTIONS   Specify automatic reinvestment of trust income, with no
sales charge, to earn compounded dividends with Nuveen mutual funds.
 
- -------------------------------------------------------
 
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND
INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
- -------------------------------------------------------
 
* Insurance relates specifically to the bonds and not to the units or to the
  market value of units. Terms of the insurance are more fully described in the
  prospectus. No representation is made as to the insurer's ability to meet its
  commitments. See Section 5 of the prospectus for details.
 
- -------------------------------------------------------
 
FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION, INCLUDING CHARGES AND
EXPENSES, ON THIS NUVEEN TAX-EXEMPT UNIT TRUST AND ANY OTHER NUVEEN FUND, CALL
YOUR BROKER . . . OR NUVEEN AT
 
                                 1-800-257-8787
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.


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