NUVEEN TAX EXEMPT UNIT TRUST SERIES 731
497, 1994-05-26
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<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
      NORTH CAROLINA
     TRUST 276
              (NORTH CAROLINA TRADITIONAL TRUST 276)
 
            Estimated Current Return
            First
            Year: 5.61% to 5.83%
            Subsequent
            Years: 5.62% to 5.84%
            as of 05/24/94
 
            Estimated Long Term Return
            5.70% to 5.92%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds
                  Cusip:
                  670958 768 Monthly Payment Option
                  670958 776 Quarterly Payment Option
                  670958 784 Semi-Annual Payment Option
 
                  Registered in North Carolina
                    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--NORTH CAROLINA TRADITIONAL TRUST 276
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT MAY 25, 1994
- --------------------------------------------------------------------------------
 
<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>
  --------------------------------------------------------------------------------------------------------------------------
  $  475,000    North Carolina Medical Care Commission, Hospital Revenue           2002 at 102          A-            --
                  Refunding Bonds (Mercy Hospital Project), Series 1992,
                  6.50% Due 8/1/15.
     515,000    North Carolina Medical Care Commission, Hospital Revenue           2003 at 102          AA            Aa
                  Refunding Bonds (Presbyterian Health Services Corp.
                  Project), Series 1993, 5.50% Due 10/1/20.
     500,000    North Carolina Municipal Power Agency Number 1, Catawba            2003 at 100          AAA           Aaa
                  Electric Revenue Bonds, Series 1992, 5.75% Due 1/1/20.
                  (Original issue discount bonds delivered on or about
                  December 10, 1992 at a price of 92.75% of principal
                  amount.)(MBIA Insured.)
     195,000    Appalachian State University, Utilities System Revenue             2004 at 102          AAA           Aaa
                  Bonds, Series 1994 of the Board of Governors of the
                  University of North Carolina, 6.20% Due 5/15/24. (When
                  issued.) (MBIA Insured.)
     250,000    Metropolitan Sewerage District of Buncombe County (North           2003 at 102          AAA           Aaa
                  Carolina), Sewerage System Revenue Refunding Bonds, Series
                  1993A, 5.50% Due 7/1/22. (FGIC Insured.)
     525,000    City of Charlotte, North Carolina, Refunding Certificates of       2003 at 102          AAA           Aaa
                  Participation (Convention Facility Project), Series 1993C,
                  5.25% Due 12/1/20. (Original issue discount bonds
                  delivered on or about August 25, 1993 at a price of
                  93.801% of principal amount.)(AMBAC Insured.)
     250,000    City of Monroe, North Carolina, Combined Enterprise System         2004 at 102           A             A
                  Revenue Bonds, Series 1994, 6.00% Due 3/1/19. (When
                  issued.)
     290,000    County of Rutherford, North Carolina, Certificates of              2004 at 102          AAA           Aaa
                  Participation (1994 Public Facilities Project), 6.00% Due
                  6/1/09. (FGIC Insured.)
     500,000    City of Thomasville, North Carolina, Certificates of               2003 at 102          AAA           Aaa
                  Participation (City Hall and Utility Improvements
                  Projects), Series 1992, 6.00% Due 6/1/17. (FSA Insured.)
  ----------
  $3,500,000
  ----------
  ----------
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION
Sales charge/volume discount applies on all concurrent purchases of any Nuveen
trust units. 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   4.90 %   $     99.61     (5.61%)  5.62%     (5.64%)  5.65%     (5.66%)  5.67%
500-999                 50,000-99,999   4.75           99.45     (5.62)   5.63      (5.65)   5.66      (5.67)   5.68
1,000-2,499           100,000-249,999   4.50           99.19     (5.63)   5.64      (5.66)   5.68      (5.68)   5.70
2,500-4,999           250,000-499,999   4.25           98.94     (5.64)   5.66      (5.68)   5.69      (5.70)   5.71
5,000-9,999           500,000-999,999   3.50           98.17     (5.69)   5.70      (5.72)   5.74      (5.74)   5.75
10,000-24,999     1,000,000-2,499,999   3.00           97.66     (5.72)   5.73      (5.75)   5.77      (5.77)   5.78
25,000-49,999     2,500,000-4,999,999   2.50           97.16     (5.75)   5.76      (5.78)   5.79      (5.80)   5.81
50,000 and over    5,000,000 and over   2.00           96.66     (5.78)   5.79      (5.81)   5.82      (5.83)   5.84
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
          AMOUNT PURCHASED
- -------------------------------------
                                                                         Estimated Long Term Return (3)
     Units                                                    -----------------------------------------------------
- ----------------
                                                   Public
                                       Sales      Offering          Monthly         Quarterly       Semi-Annual
                        Dollars        Charge     Price (1)         Payment          Payment          Payment
                  -------------------  ------    -----------     -------------    -------------    -------------
50-499                 $5,000-$49,999   4.90 %   $     99.61          5.70    %        5.73    %        5.74    %
500-999                 50,000-99,999   4.75           99.45          5.70             5.73             5.75
1,000-2,499           100,000-249,999   4.50           99.19          5.72             5.75             5.77
2,500-4,999           250,000-499,999   4.25           98.94          5.73             5.76             5.78
5,000-9,999           500,000-999,999   3.50           98.17          5.78             5.81             5.83
10,000-24,999     1,000,000-2,499,999   3.00           97.66          5.81             5.84             5.86
25,000-49,999     2,500,000-4,999,999   2.50           97.16          5.84             5.87             5.89
50,000 and over    5,000,000 and over   2.00           96.66          5.87             5.90             5.92
</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.
 
- --------------------------------------------------------------------------------
 
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
North Carolina Traditional Trust                         1994                                  1995                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        7/1            8/1           11/1            2/1            5/1
Distribution Date.....................       7/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5588(1)                                                               $  5.5984
                                                             --------    $.4665 every month    --------
Quarterly Distribution Plan...........  $   .5588(1)   $   .4692(2)   $  1.4076      $  1.4076      $  1.4076      $  5.6304
Semi-Annual Distribution Plan.........  $   .5588(1)                  $  1.8828(3)                  $  2.8242      $  5.6494
- ---------------------------------------------------------------------------------------------------------------------------------
<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) The second distribution under the quarterly distribution plan represents a 1-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 4-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 $.11 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 $.01552 per unit per day.
Consequently, on the first Record Date (07/01/94), accrued interest will total
$0.5588 per unit for the 36-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 07/01/94 is $.5588 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01555              Quarterly - $0.01564
                             Semi-Annual - $0.01569
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.
 
- --------------------------------------------------------------------------------
 
                                                          731
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 24.4 years.
The first bond is scheduled to mature in June, 2009, with the last bond maturity
being May, 2024.
 
- -------------------------------------------------
 
QUALITY OF PORTFOLIO AS RATED BY
STANDARD & POOR'S CORPORATION
OR MOODY'S INVESTORS SERVICES
- -------------------------------------------------
 
<TABLE>
<CAPTION>
       Rating          Percent of Portfolio
      Category              Par Value
<S>                    <C>                   <C>
- -------------------------------------------------------------
AAA                         65%
AA                          15
A                           20
                           ---
                           100%
</TABLE>
 
- -------------------------------------------------
 
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.
 
- -------------------------------------------------
 
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
     VIRGINIA
     TRUST 287
              (VIRGINIA TRADITIONAL TRUST 287)
 
            Estimated Current Return
            5.65% to 5.88%
            as of 05/24/94
 
            Estimated Long Term Return
            5.72% to 5.94%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds
                  Cusip:
                  6706L5 317 Monthly Payment Option
                  6706L5 325 Quarterly Payment Option
                  6706L5 333 Semi-Annual Payment Option
 
                  Registered in Virginia
                    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--VIRGINIA TRADITIONAL TRUST 287
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT MAY 25, 1994
- --------------------------------------------------------------------------------
 
<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    Fairfax County Economic Development Authority (Virginia),          2004 at 102          AA            Aa
                  Lease Revenue Bonds (Government Center Properties), Series
                  1994, 5.50% Due 5/15/18. (Original issue discount bonds
                  delivered on or about March 15, 1994 at a price of 93.654%
                  of principal amount.)
     500,000    Fairfax County (Virginia), Redevelopment and Housing               2003 at 102          AAA           Aaa
                  Authority, Mortgage Revenue Refunding Bonds, Series 1993A
                  (FHA Insured Mortgage Loan-Burke Centre Station), 5.75%
                  Due 8/1/25. (MBIA Insured.)
     500,000    The Town of Leesburg, Virginia, Utility System Revenue             2002 at 102          AAA           Aaa
                  Bonds, Series 1992, 6.30% Due 7/1/17. (MBIA Insured.)
     500,000    Norfolk Industrial Development Authority (Virginia),               2004 at 102          AA            Aa
                  Hospital Revenue and Refunding Bonds (Sentara Health
                  System), Series 1994B, 5.50% Due 11/1/17.
     500,000    Peninsula Ports Authority of Virginia, Health System Revenue       2002 at 102          AA-           Aa
                  and Refunding Bonds (Riverside Health System Project),
                  Series 1992-A, 6.625% Due 7/1/18.
     500,000    Richmond Metropolitan Authority (Virginia), Expressway             2002 at 102          AAA           Aaa
                  Revenue and Refunding Bonds, Series 1992-B, 6.25% Due
                  7/15/22. (FGIC Insured.)
     500,000    County of Roanoke, Virginia, Water System Refunding Revenue        2003 at 102          AAA           Aaa
                  Bonds, Series 1993, 5.00% Due 7/1/21. (FGIC Insured.)
  ----------
  $3,500,000
  ----------
  ----------
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION
Sales charge/volume discount applies on all concurrent purchases of any Nuveen
trust units. 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 %   $     99.52          5.65%            5.69%            5.70%
500-999                 50,000-99,999   4.75           99.36          5.66             5.69             5.71
1,000-2,499           100,000-249,999   4.50           99.10          5.68             5.71             5.73
2,500-4,999           250,000-499,999   4.25           98.84          5.69             5.72             5.74
5,000-9,999           500,000-999,999   3.50           98.07          5.74             5.77             5.79
10,000-24,999     1,000,000-2,499,999   3.00           97.57          5.77             5.80             5.82
25,000-49,999     2,500,000-4,999,999   2.50           97.07          5.80             5.83             5.85
50,000 and over    5,000,000 and over   2.00           96.57          5.83             5.86             5.88
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
          AMOUNT PURCHASED
- -------------------------------------
                                                                         Estimated Long Term Return (3)
     Units                                                    -----------------------------------------------------
- ----------------
                                                   Public
                                       Sales      Offering          Monthly         Quarterly       Semi-Annual
                        Dollars        Charge     Price (1)         Payment          Payment          Payment
                  -------------------  ------    -----------     -------------    -------------    -------------
50-499                 $5,000-$49,999   4.90 %   $     99.52          5.72    %        5.74    %        5.76    %
500-999                 50,000-99,999   4.75           99.36          5.72             5.75             5.77
1,000-2,499           100,000-249,999   4.50           99.10          5.74             5.77             5.79
2,500-4,999           250,000-499,999   4.25           98.84          5.75             5.78             5.80
5,000-9,999           500,000-999,999   3.50           98.07          5.80             5.83             5.85
10,000-24,999     1,000,000-2,499,999   3.00           97.57          5.83             5.86             5.88
25,000-49,999     2,500,000-4,999,999   2.50           97.07          5.86             5.89             5.91
50,000 and over    5,000,000 and over   2.00           96.57          5.89             5.92             5.94
</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
Virginia Traditional Trust                               1994                                  1995                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        7/1            8/1           11/1            2/1            5/1
Distribution Date.....................       7/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5623(1)                                                               $  5.6258
                                                             --------    $.4686 every month    --------
Quarterly Distribution Plan...........  $   .5623(1)   $   .4713(2)   $  1.4139      $  1.4139      $  1.4139      $  5.6578
Semi-Annual Distribution Plan.........  $   .5623(1)                  $  1.8912(3)                  $  2.8368      $  5.6768
- ---------------------------------------------------------------------------------------------------------------------------------
<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) The second distribution under the quarterly distribution plan represents a 1-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 4-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 $.11 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 $.01562 per unit per day.
Consequently, on the first Record Date (07/01/94), accrued interest will total
$0.5623 per unit for the 36-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 07/01/94 is $.5623 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01562              Quarterly - $0.01571
                             Semi-Annual - $0.01576
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.
 
- --------------------------------------------------------------------------------
 
                                                          731
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 25.9 years.
The first bond is scheduled to mature in July, 2017, with the last bond maturity
being August, 2025.
 
- -------------------------------------------------
 
QUALITY OF PORTFOLIO AS RATED BY
STANDARD & POOR'S CORPORATION
OR MOODY'S INVESTORS SERVICES
- -------------------------------------------------
 
<TABLE>
<CAPTION>
       Rating          Percent of Portfolio
      Category              Par Value
<S>                    <C>                   <C>
- -------------------------------------------------------------
AAA                         57%
AA                          43
                           ---
                           100%
</TABLE>
 
- -------------------------------------------------
 
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.
 
- -------------------------------------------------
 
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
     SHORT INTERMEDIATE
     INSURED
     TRUST 31
 
            Estimated Current Return
            4.41% to 4.53%
            as of 05/24/94
 
            Estimated Long Term Return
            4.63% to 4.75%
             100,000 units in a
             diversified $10,000,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  6710A0 221 Monthly Payment Option
                  6710A0 239 Quarterly Payment Option
                  6710A0 247 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, SHORT INTERMEDIATE INSURED TRUST 31
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT MAY 25, 1994
- --------------------------------------------------------------------------------
 
<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>
  --------------------------------------------------------------------------------------------------------------------------
  $1,000,000    Municipality of Anchorage, Alaska, 1993 General Obligation         No Optional          AAA           Aaa
                  Refunding School Bonds, Series A, 5.00% Due 8/1/98.                 Call
   1,500,000    City of Phoenix, Arizona, Airport Revenue Refunding Bonds,         No Optional          AAA           Aaa
                  Series 1994B,                                                       Call
                1,000M-4.95% Due 7/1/98,
                500M-5.10% Due 7/1/99.
                  (When issued.)
     200,000    Hillsborough County, Florida, Refunding Utility Revenue            No Optional          AAA           Aaa
                  Bonds, Series 1991A, 0.00% Due 8/1/98. (Original issue              Call
                  discount bonds delivered on or about September 24, 1991 at
                  a price of 62.407% of principal amount.)
   1,000,000    City and County of Honolulu, Hawaii, General Obligation            No Optional          AAA           Aaa
                  Bonds, Refunding and Improvement Series 1993B, 4.60% Due            Call
                  10/1/99.
   1,000,000    The Trustees of Indiana University, Indiana University             No Optional          AAA           Aaa
                  Facility Revenue Bonds, Series 1994A, 5.00% Due 11/15/99.           Call
                  (When issued.)
     300,000    Charter County of Wayne, Michigan, Airport Revenue Refunding       No Optional          AAA           Aaa
                  Bonds (Detroit Metropolitan Wayne County Airport), Series           Call
                  1994A, 4.95% Due 12/1/99.
   1,000,000    The School District of Philadelphia, Pennsylvania, General         No Optional          AAA           Aaa
                  Obligation Bonds, Series A of 1994, 4.95% Due 7/1/99.               Call
   1,000,000    The Health and Educational Facilities Board of the City of         No Optional          AAA           Aaa
                  Bristol, Tennessee, Hospital Revenue Refunding Bonds,               Call
                  Series 1993 (Bristol Memorial Hospital), 4.50% Due 9/1/99.
   1,000,000    Texas Municipal Power Agency, Refunding Revenue Bonds,             No Optional          AAA           Aaa
                  Series 1993, 4.50% Due 9/1/98.                                      Call
   1,000,000    The City of Seattle, Washington, Water System and Refunding        No Optional          AAA           Aaa
                  Revenue Bonds, 1993, 4.60% Due 12/1/99.                             Call
   1,000,000    Washington Public Power Supply System, Nuclear Project No. 2       No Optional          AAA           Aaa
                  Refunding Revenue Bonds, Series 1993A, 4.75% Due 7/1/99.            Call
  ----------
  $10,000,000
  ----------
  ----------
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION
Sales charge/volume discount applies on all concurrent purchases of any Nuveen
trust units. 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   3.00 %   $    101.87          4.41%            4.44%            4.46%
500-999                 50,000-99,999   2.80          101.66          4.42             4.45             4.47
1,000-2,499           100,000-249,999   2.60          101.45          4.43             4.46             4.48
2,500-4,999           250,000-499,999   2.35          101.19          4.44             4.47             4.49
5,000-9,999           500,000-999,999   2.10          100.93          4.45             4.48             4.50
10,000-24,999     1,000,000-2,499,999   1.85          100.67          4.46             4.49             4.51
25,000-49,999     2,500,000-4,999,999   1.80          100.62          4.46             4.50             4.52
50,000 and over    5,000,000 and over   1.50          100.31          4.48             4.51             4.53
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
          AMOUNT PURCHASED
- -------------------------------------
                                                                         Estimated Long Term Return (3)
     Units                                                    -----------------------------------------------------
- ----------------
                                                   Public
                                       Sales      Offering          Monthly         Quarterly       Semi-Annual
                        Dollars        Charge     Price (1)         Payment          Payment          Payment
                  -------------------  ------    -----------     -------------    -------------    -------------
50-499                 $5,000-$49,999   3.00 %   $    101.87          4.63    %        4.67    %        4.68    %
500-999                 50,000-99,999   2.80          101.66          4.64             4.68             4.69
1,000-2,499           100,000-249,999   2.60          101.45          4.65             4.69             4.70
2,500-4,999           250,000-499,999   2.35          101.19          4.66             4.70             4.70
5,000-9,999           500,000-999,999   2.10          100.93          4.67             4.71             4.72
10,000-24,999     1,000,000-2,499,999   1.85          100.67          4.68             4.72             4.73
25,000-49,999     2,500,000-4,999,999   1.80          100.62          4.68             4.72             4.73
50,000 and over    5,000,000 and over   1.50          100.31          4.70             4.74             4.75
</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.
 
- --------------------------------------------------------------------------------
 
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
Short Intermediate Insured Trust                         1994                                  1995                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        7/1            8/1           11/1            2/1            5/1
Distribution Date.....................       7/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .4489(1)                                                               $  4.4924
                                                             --------    $.3741 every month    --------
Quarterly Distribution Plan...........  $   .4489(1)   $   .3768(2)   $  1.1304      $  1.1304      $  1.1304      $  4.5244
Semi-Annual Distribution Plan.........  $   .4489(1)                  $  1.5144(3)                  $  2.2716      $  4.5434
- ---------------------------------------------------------------------------------------------------------------------------------
<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) The second distribution under the quarterly distribution plan represents a 1-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 4-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 $.09 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 $.01247 per unit per day.
Consequently, on the first Record Date (07/01/94), accrued interest will total
$0.4489 per unit for the 36-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 07/01/94 is $.4489 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01247              Quarterly - $0.01256
                             Semi-Annual - $0.01262
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 9 states.
- -------------------------------------------------
<TABLE>
<CAPTION>
                   Percent
                   of Total
                   Income
<S>                    <C>        <C>
- ------------------------
                                  %
Alaska                      10.7
Arizona                     16.0
Hawaii                       9.8
Indiana                     10.7
Michigan                     3.2
 
<CAPTION>
                   Percent
                   of Total
                   Income
- ------------------------
<S>                    <C>        <C>
                                  %
Pennsylvania                10.6
Tennessee                    9.6
Texas                        9.6
Washington                  19.8
</TABLE>
 
- -------------------------------------------------
 
AVERAGE PORTFOLIO LIFE The average maturity
of portfolio bonds is 4.9 years.
 
<TABLE>
<CAPTION>
Year Bonds Mature                        Amount      Percent
- -------------------------------------  ----------  -----------
<S>                                    <C>         <C>
1998.................................       3,200        32.0%
1999.................................       6,800        68.0
</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.
 
- -------------------------------------------------
 
* 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.
 
731
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     PENNSYLVANIA
     INSURED
     TRUST 181
 
            Estimated Current Return
            First
            Year: 5.63% to 5.85%
            Subsequent
            Years: 5.70% to 5.92%
            as of 05/24/94
 
            Estimated Long Term Return
            5.74% to 5.96%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  6706H9 439 Monthly Payment Option
                  6706H9 447 Quarterly Payment Option
                  6706H9 454 Semi-Annual Payment Option
 
                  Registered in Pennsylvania & Florida
                    John Nuveen & Co. Incorporated
                    Investment Bankers
<PAGE>
 
<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, PENNSYLVANIA INSURED TRUST 181
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT MAY 25, 1994
- --------------------------------------------------------------------------------
 
<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    Allegheny County Hospital Development Authority                    2002 at 100          AAA           Aaa
                  (Pennsylvania), Health Center Revenue Bonds, Series 1992A
                  (Presbyterian University Health System, Inc. Project),
                  6.25% Due 11/1/23.
     500,000    Bedford Area School District (Bedford County, Pennsylvania),       2004 at 100          AAA           Aaa
                  General Obligation Bonds, Series A of 1994, 6.20% Due
                  4/15/24. (When issued.)
     500,000    Carlisle Suburban Authority, Cumberland County,                    2002 at 100          AAA           Aaa
                  Pennsylvania, Guaranteed Water and Sewer Revenue
                  Bonds-Series of 1992, 6.125% Due 12/15/19.
     500,000    Franklin County Industrial Development Authority                   2002 at 102          AAA           Aaa
                  (Pennsylvania), Hospital Revenue Bonds, The Chambersburg
                  Hospital Project, Series of 1992, 6.25% Due 7/1/22.
     500,000    Lehigh County Industrial Development Authority, Pollution          2004 at 102          AAA           Aaa
                  Control Revenue Refunding Bonds, 1994 Series A
                  (Pennsylvania Power & Light Company Project), 5.50% Due
                  2/15/27.
     500,000    City of Philadelphia, Pennsylvania, Water and Wastewater           2003 at 102          AAA           Aaa
                  Revenue Bonds, Series 1993, 5.25% Due 6/15/23. (Original
                  issue discount bonds delivered on or about August 26, 1993
                  at a price of 92.499% of principal amount.)
     500,000    Commonwealth of Puerto Rico, Public Improvement Bonds of           2004 at 101          AAA           Aaa
                  1994 (General Obligation Bonds), 6.50% Due 7/1/23.                   1/2
  ----------
  $3,500,000
  ----------
  ----------
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION
Sales charge/volume discount applies on all concurrent purchases of any Nuveen
trust units. 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   4.90 %   $    101.50     (5.63%)  5.70%     (5.66%)  5.73%     (5.68%)  5.75%
500-999                 50,000-99,999   4.75          101.34     (5.64)   5.71      (5.67)   5.74      (5.69)   5.76
1,000-2,499           100,000-249,999   4.50          101.08     (5.65)   5.72      (5.69)   5.75      (5.70)   5.77
2,500-4,999           250,000-499,999   4.25          100.81     (5.67)   5.74      (5.70)   5.77      (5.72)   5.79
5,000-9,999           500,000-999,999   3.50          100.03     (5.71)   5.78      (5.74)   5.81      (5.76)   5.83
10,000-24,999     1,000,000-2,499,999   3.00           99.52     (5.74)   5.81      (5.77)   5.84      (5.79)   5.86
25,000-49,999     2,500,000-4,999,999   2.50           99.00     (5.77)   5.84      (5.80)   5.87      (5.82)   5.89
50,000 and over    5,000,000 and over   2.00           98.50     (5.80)   5.87      (5.83)   5.90      (5.85)   5.92
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
          AMOUNT PURCHASED
- -------------------------------------
                                                                         Estimated Long Term Return (3)
     Units                                                    -----------------------------------------------------
- ----------------
                                                   Public
                                       Sales      Offering          Monthly         Quarterly       Semi-Annual
                        Dollars        Charge     Price (1)         Payment          Payment          Payment
                  -------------------  ------    -----------     -------------    -------------    -------------
50-499                 $5,000-$49,999   4.90 %   $    101.50          5.74    %        5.76    %        5.78    %
500-999                 50,000-99,999   4.75          101.34          5.74             5.77             5.79
1,000-2,499           100,000-249,999   4.50          101.08          5.76             5.79             5.81
2,500-4,999           250,000-499,999   4.25          100.81          5.77             5.80             5.82
5,000-9,999           500,000-999,999   3.50          100.03          5.82             5.85             5.87
10,000-24,999     1,000,000-2,499,999   3.00           99.52          5.85             5.88             5.90
25,000-49,999     2,500,000-4,999,999   2.50           99.00          5.88             5.91             5.93
50,000 and over    5,000,000 and over   2.00           98.50          5.91             5.94             5.96
</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.
 
- --------------------------------------------------------------------------------
 
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
Pennsylvania Insured Trust                               1994                                  1995                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        7/1            8/1           11/1            2/1            5/1
Distribution Date.....................       7/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5634(1)                                                               $  5.7842
                                                             --------    $.4818 every month    --------
Quarterly Distribution Plan...........  $   .5634(1)   $   .4845(2)   $  1.4535      $  1.4535      $  1.4535      $  5.8162
Semi-Annual Distribution Plan.........  $   .5634(1)                  $  1.9440(3)                  $  2.9160      $  5.8352
- ---------------------------------------------------------------------------------------------------------------------------------
<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) The second distribution under the quarterly distribution plan represents a 1-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 4-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 $.10 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 $.01565 per unit per day.
Consequently, on the first Record Date (07/01/94), accrued interest will total
$0.5634 per unit for the 36-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 07/01/94 is $.5634 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01606              Quarterly - $0.01615
                             Semi-Annual - $0.01620
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.
 
- --------------------------------------------------------------------------------
 
                                                          731
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 29.1 years.
The first bond is scheduled to mature in December, 2019, with the last bond
maturity being February, 2027.
 
- -------------------------------------------------
 
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.
 
- -------------------------------------------------
 
* 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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