NUVEEN TAX EXEMPT UNIT TRUST SERIES 720
497, 1994-03-18
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<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     CONNECTICUT
     TRUST 263
              (CONNECTICUT TRADITIONAL TRUST 263)
 
            Estimated Current Return
            First
            Year: 5.25% to 5.41%
            Subsequent
            Years: 5.26% to 5.42%
            as of 03/16/94
 
            Estimated Long Term Return
            5.34% to 5.50%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds
                  Cusip:
                  67094E 378 Monthly Payment Option
                  67094E 386 Quarterly Payment Option
                  67094E 394 Semi-Annual Payment Option
 
                  Registered in Connecticut
                    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--CONNECTICUT TRADITIONAL TRUST 263
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT MARCH 17, 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    State of Connecticut, General Obligation Bonds (1994 Series        2004 at 101          AA-           Aa
                  A), 5.65% Due 3/15/12. (When issued.)                                1/2
     525,000    State of Connecticut, Special Tax Obligation Bonds,                2004 at 101          AAA           Aaa
                  Transportation Infrastructure Purposes, 1994 Series A,               1/2
                  5.65% Due 4/1/13. (When issued.) (FGIC Insured.)
     525,000    Connecticut Development Authority, Water Facilities Revenue        2003 at 100          AAA           Aaa
                  Refunding Bonds (The Connecticut Water Company
                  Project-1993B Series), 5.30% Due 9/1/28. (MBIA Insured.)
     500,000    State of Connecticut Health and Educational Facilities             2003 at 102          AAA           Aaa
                  Authority Revenue Bonds, Lawrence and Memorial Hospital
                  Issue, Series D, 5.00% Due 7/1/22. (Original issue
                  discount bonds delivered on or about December 29, 1993 at
                  a price of 94.491% of principal amount.)(MBIA Insured.)
     500,000    State of Connecticut Health and Educational Facilities             2003 at 101          AAA           Aaa
                  Authority Revenue Bonds, Manchester Memorial Hospital
                  Issue, Series D, 5.75% Due 7/1/22. (MBIA Insured.)
     500,000    State of Connecticut Health and Educational Facilities             2003 at 102          AAA           Aaa
                  Authority, Revenue Bonds, Saint Francis Hospital and
                  Medical Center Issue, Series C, 5.00% Due 7/1/23. (FGIC
                  Insured.)
     450,000    Commonwealth of Puerto Rico, Public Improvement Bonds of           2002 at 101          AAA           Aaa
                  1993 (General Obligation Bonds.), 5.875% Due 7/1/18.                 1/2
                  (AMBAC 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>
50-999                 $5,000-$99,999   4.90 %   $    100.41     (5.25%)  5.26%     (5.28%)  5.29%     (5.30%)  5.31%
1,000-2,499           100,000-249,999   4.50           99.99     (5.27)   5.28      (5.30)   5.32      (5.32)   5.34
2,500-4,999           250,000-499,999   4.25           99.73     (5.29)   5.30      (5.32)   5.33      (5.34)   5.35
5,000-9,999           500,000-999,999   3.50           98.95     (5.33)   5.34      (5.36)   5.37      (5.38)   5.39
10,000 and over    1,000,000 and over   3.00           98.44     (5.35)   5.37      (5.39)   5.40      (5.41)   5.42
</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>
50-999                 $5,000-$99,999   4.90 %   $    100.41          5.34%            5.37%            5.39%
1,000-2,499           100,000-249,999   4.50           99.99          5.36             5.40             5.42
2,500-4,999           250,000-499,999   4.25           99.73          5.37             5.41             5.43
5,000-9,999           500,000-999,999   3.50           98.95          5.41             5.45             5.47
10,000 and over    1,000,000 and over   3.00           98.44          5.44             5.48             5.50
</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
Connecticut Traditional Trust                            1994                                  1995                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        6/1            8/1           11/1            2/1            5/1
Distribution Date.....................       6/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .3872(1)                                                               $  5.2839
                                                             --------    $.4403 every month    --------
Quarterly Distribution Plan...........  $   .3872(1)   $   .8859(2)   $  1.3289      $  1.3289      $  1.3289      $  5.3159
Semi-Annual Distribution Plan.........  $   .3872(1)                  $  2.2228(3)                  $  2.6674      $  5.3349
- ---------------------------------------------------------------------------------------------------------------------------------
<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.
(2) The second distribution under the quarterly distribution plan represents a 2-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 5-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 $.01468 per unit per day.
Consequently, on the first Record Date (06/01/94), accrued interest will total
$1.0863 per unit for the 74-day period. Because a substantial portion of this
interest will not yet be due from the issuers of the bonds in the Fund, the
first payment to all Unitholders of Record on 06/01/94 is $.3872, and the
remaining $.6991 of accrued interest will remain an asset of the Trust and be
distributed in subsequent periods as portfolio bonds mature, or are redeemed, or
sold and the accrued interest on these bonds is collected. After the first
Record Date daily rates of accrual are:
              Monthly - $0.01468              Quarterly - $0.01477
                             Semi-Annual - $0.01482
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.
 
- --------------------------------------------------------------------------------
 
                                                          720
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 26.0 years.
The first bond is scheduled to mature in March, 2012, with the last bond
maturity being September, 2028.
 
- -------------------------------------------------
 
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                         86%
AA                          14
                           ---
                           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
 
                                 1-800-351-4100
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     INTERMEDIATE
     INSURED
     TRUST 73
 
            Estimated Current Return
            First
            Year: 4.75% to 4.85%
            Subsequent
            Years: 4.77% to 4.88%
            as of 03/16/94
 
            Estimated Long Term Return
            4.91% to 5.02%
             100,000 units in a
             diversified $10,000,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  67093H 711 Monthly Payment Option
                  67093H 729 Quarterly Payment Option
                  67093H 737 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 73
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT MARCH 17, 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    Matanuska-Susitna Borough, Alaska, General Obligation School       No Optional          AAA           Aaa
                  Construction Bonds, 1994 Series A,                                  Call
                500M-5.20% Due 5/1/03,
                500M-5.30% Due 5/1/04. (When issued.)
     500,000    State Board of Directors for Community Colleges of Arizona,        No Optional          AAA           Aaa
                  Maricopa County Community College District, Revenue                 Call
                  Refunding Bonds, Series 1993, 4.95% Due 7/15/03.
   1,000,000    County of Alameda, California, 1993 Refunding Certificates         No Optional          AAA           Aaa
                  of Participation (Santa Rita Jail Project), 5.25% Due               Call
                  12/1/04.
   1,000,000    State of California, Various Purpose General Obligation            No Optional          AAA           Aaa
                  Bonds, 5.125% Due 3/1/04. (When issued.)                            Call
     500,000    Board of Trustees of the State Colleges in Colorado, Western       No Optional          AAA           Aaa
                  State College of Colorado Project, Series C 1994, 5.10%             Call
                  Due 5/15/04. (When issued.)
     125,000    School District No. 1 in the City and County of Denver, and        No Optional          AAA           Aaa
                  State of Colorado, General Obligation Refunding Bonds,              Call
                  Series 1994A, 0.00% Due 12/1/04. (Original issue discount
                  bonds delivered on or about February 22, 1994 at a price
                  of 58.735% of principal amount.)
   1,000,000    District of Columbia, Hospital Revenue Refunding Bonds             No Optional          AAA           Aaa
                  (Medlantic Healthcare Group, Inc. Issue), Series 1993A,             Call
                  5.40% Due 8/15/04.
   1,000,000    District of Columbia (Washington, D.C.), General Obligation        No Optional          AAA           Aaa
                  Refunding Bonds, Series 1993B, 5.10% Due 6/1/03.                    Call
     385,000    Solid Waste Agency of Northern Cook County (Illinois),                                  AAA           Aaa
                  Contract Revenue Bonds, Series 1994,
                210M-4.90% Due 5/1/03,                                             No Optional
                                                                                      Call
                175M-5.00% Due 5/1/04. (When issued.)                              2003 at 100
     100,000    Massachusetts Bay Transportation Authority, General                No Optional          AAA           Aaa
                  Transportation System Bonds, 1993 Series A Refunding,               Call
                  5.00% Due 3/1/03. (General Obligation Bonds.)
     250,000    Boston Water and Sewer Commission (Massachusetts), General         2003 at 102          AAA           Aaa
                  Revenue Bonds, 1993 Series A (Senior Series), 5.00% Due
                  11/1/04.
     140,000    Dormitory Authority of the State of New York, State                No Optional          AAA           Aaa
                  University Educational Facilities Revenue Bonds, Series             Call
                  1994A, 0.00% Due 5/15/03. (Original issue discount bonds
                  delivered on or about March 3, 1994 at a price of 64.927%
                  of principal amount.)
   1,000,000    Rhode Island Public Buildings Authority, State Public              2003 at 102          AAA           Aaa
                  Projects Revenue Bonds, 1993 Series A, 5.00% Due 2/1/04.
   1,000,000    Washington Public Power Supply System, Nuclear Project No. 3       No Optional          AAA           Aaa
                  Refunding Revenue Bonds, Series 1993C, 4.90% Due 7/1/04.            Call
   1,000,000    Wisconsin Health and Educational Facilities Authority,             2003 at 102          AAA           Aaa
                  Revenue Bonds, Series 1993A (Lutheran Hospital-La Crosse,
                  Inc.), 5.60% Due 2/15/04.
  ----------
  $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>       <C>      <C>       <C>
50-999                 $5,000-$99,999   3.90 %   $    102.17     (4.75%)  4.77%     (4.78%)  4.80%     (4.80%)  4.82%
1,000-2,499           100,000-249,999   3.50          101.75     (4.77)   4.79      (4.80)   4.82      (4.82)   4.84
2,500-4,999           250,000-499,999   3.25          101.49     (4.78)   4.80      (4.81)   4.83      (4.83)   4.85
5,000-9,999           500,000-999,999   3.00          101.23     (4.79)   4.81      (4.82)   4.85      (4.84)   4.87
10,000 and over    1,000,000 and over   2.75          100.97     (4.80)   4.83      (4.83)   4.86      (4.85)   4.88
</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>
50-999                 $5,000-$99,999   3.90 %   $    102.17          4.91%            4.94%            4.96%
1,000-2,499           100,000-249,999   3.50          101.75          4.93             4.96             4.98
2,500-4,999           250,000-499,999   3.25          101.49          4.94             4.97             4.99
5,000-9,999           500,000-999,999   3.00          101.23          4.96             4.99             5.01
10,000 and over    1,000,000 and over   2.75          100.97          4.97             5.00             5.02
</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                               1994                                  1995                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        6/1            8/1           11/1            2/1            5/1
Distribution Date.....................       6/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .2774(1)                                                               $  4.8739
                                                             --------    $.4061 every month    --------
Quarterly Distribution Plan...........  $   .2774(1)   $   .8176(2)   $  1.2264      $  1.2264      $  1.2264      $  4.9059
Semi-Annual Distribution Plan.........  $   .2774(1)                  $  2.0520(3)                  $  2.4624      $  4.9249
- ---------------------------------------------------------------------------------------------------------------------------------
<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.
(2) The second distribution under the quarterly distribution plan represents a 2-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 5-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 $.01354 per unit per day.
Consequently, on the first Record Date (06/01/94), accrued interest will total
$1.0019 per unit for the 74-day period. Because a substantial portion of this
interest will not yet be due from the issuers of the bonds in the Fund, the
first payment to all Unitholders of Record on 06/01/94 is $.2774, and the
remaining $.7245 of accrued interest will remain an asset of the Trust and be
distributed in subsequent periods as portfolio bonds mature, or are redeemed, or
sold and the accrued interest on these bonds is collected. After the first
Record Date daily rates of accrual are:
              Monthly - $0.01354              Quarterly - $0.01363
                             Semi-Annual - $0.01368
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 15 Tax-exempt bond issues in this trust; this diversified portfolio
yields current income from issuers in 10 states and the District of Columbia.
- -------------------------------------------------
<TABLE>
<CAPTION>
                   Percent
                   of Total
                   Income
<S>                    <C>        <C>
- ------------------------
                                  %
Alaska                      10.4
Arizona                      4.9
California                  20.7
Colorado                     5.1
Washington D.C.             20.9
 
<CAPTION>
                   Percent
                   of Total
                   Income
- ------------------------
<S>                    <C>        <C>
                                  %
Illinois                     3.8
Massachusetts                3.5
Rhode Island                 9.9
Washington                   9.7
Wisconsin                   11.1
</TABLE>
 
- -------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 10.0 years.
The first bond is scheduled to mature in March, 2003, with the last bond
maturity being December, 2004.
 
- -------------------------------------------------
 
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
 
                                 1-800-351-4100
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
 
720
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     CALIFORNIA
     INSURED
     TRUST 222
 
            Estimated Current Return
            5.50% to 5.66%
            as of 03/16/94
 
            Estimated Long Term Return
            5.50% to 5.66%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  67064U 139 Monthly Payment Option
                  67064U 147 Quarterly Payment Option
                  67064U 154 Semi-Annual Payment Option
 
                  Registered in California
                    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, CALIFORNIA INSURED TRUST 222
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT MARCH 17, 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>
  --------------------------------------------------------------------------------------------------------------------------
  $  530,000    California Health Facilities Financing Authority, Kaiser           2002 at 101          AAA           Aaa
                  Permanente, Medical Care Program, Semiannual Tender
                  Revenue Bonds, 1985 Tender Bonds, 5.55% Due 8/15/25.
     525,000    The Regents of the University of California, University of         2003 at 102          AAA           Aaa
                  California Housing System Revenue Bonds, Series A, 5.50%
                  Due 11/1/18.
     525,000    The City of Los Angeles, California, Wastewater System             2003 at 102          AAA           Aaa
                  Revenue Bonds, Refunding Series 1993-A, 5.70% Due 6/1/20.
     530,000    Department of Water and Power of the City of Los Angeles,          2003 at 102          AAA           Aaa
                  California, Electric Plant Refunding Revenue Bonds, Issue
                  of 1993, 5.875% Due 9/1/30.
     530,000    San Bernardino County, California, Certificates of                 2002 at 102          AAA           Aaa
                  Participation (1992 West Valley Detention Center
                  Refinancing Project), 6.00% Due 11/1/18. (Original issue
                  discount bonds delivered on or about May 14, 1992 at a
                  price of 93.719% of principal amount.)
     360,000    San Diego Regional Building Authority (California),                2003 at 102          AAA           Aaa
                  Refunding Lease Revenue Bonds, Series 1993A (San Miguel
                  Consolidated Fire Protection District Project), 5.65% Due
                  1/1/20.
     500,000    Walnut Public Financing Authority (Los Angeles County,             2002 at 102          AAA           Aaa
                  California), 1992 Tax Allocation Revenue Bonds (Walnut
                  Improvement Project), 6.50% Due 9/1/22.
  ----------
  $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>
50-999                 $5,000-$99,999   4.90 %   $    102.79          5.50%            5.53%            5.55%
1,000-2,499           100,000-249,999   4.50          102.36          5.52             5.55             5.57
2,500-4,999           250,000-499,999   4.25          102.09          5.54             5.57             5.59
5,000-9,999           500,000-999,999   3.50          101.30          5.58             5.61             5.63
10,000 and over    1,000,000 and over   3.00          100.77          5.61             5.64             5.66
</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>
50-999                 $5,000-$99,999   4.90 %   $    102.79          5.50%            5.54%            5.54%
1,000-2,499           100,000-249,999   4.50          102.36          5.52             5.56             5.57
2,500-4,999           250,000-499,999   4.25          102.09          5.53             5.57             5.58
5,000-9,999           500,000-999,999   3.50          101.30          5.58             5.62             5.63
10,000 and over    1,000,000 and over   3.00          100.77          5.61             5.65             5.66
</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
California Insured Trust                                 1994                                  1995                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        6/1            8/1           11/1            2/1            5/1
Distribution Date.....................       6/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .3231(1)                                                               $  5.6533
                                                             --------    $.4711 every month    --------
Quarterly Distribution Plan...........  $   .3231(1)   $   .9475(2)   $  1.4213      $  1.4213      $  1.4213      $  5.6853
Semi-Annual Distribution Plan.........  $   .3231(1)                  $  2.3767(3)                  $  2.8521      $  5.7043
- ---------------------------------------------------------------------------------------------------------------------------------
<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.
(2) The second distribution under the quarterly distribution plan represents a 2-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 5-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 $.01570 per unit per day.
Consequently, on the first Record Date (06/01/94), accrued interest will total
$1.1618 per unit for the 74-day period. Because a substantial portion of this
interest will not yet be due from the issuers of the bonds in the Fund, the
first payment to all Unitholders of Record on 06/01/94 is $.3231, and the
remaining $.8387 of accrued interest will remain an asset of the Trust and be
distributed in subsequent periods as portfolio bonds mature, or are redeemed, or
sold and the accrued interest on these bonds is collected. After the first
Record Date daily rates of accrual are:
              Monthly - $0.01570              Quarterly - $0.01579
                             Semi-Annual - $0.01585
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.
 
- --------------------------------------------------------------------------------
 
                                                          720
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 28.3 years.
The first bond is scheduled to mature in November, 2018, with the last bond
maturity being September, 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.
 
- -------------------------------------------------
 
* 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
 
                                 1-800-351-4100
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     FLORIDA
     INSURED
     TRUST 187
 
            Estimated Current Return
            First
            Year: 5.31% to 5.47%
            Subsequent
            Years: 5.33% to 5.49%
            as of 03/16/94
 
            Estimated Long Term Return
            5.39% to 5.55%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  6706H3 192 Monthly Payment Option
                  6706H3 200 Quarterly Payment Option
                  6706H3 218 Semi-Annual Payment Option
 
                  Registered in 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, FLORIDA INSURED TRUST 187
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT MARCH 17, 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>
  --------------------------------------------------------------------------------------------------------------------------
  $  415,000    State of Florida, State Board of Education, Public Education       2003 at 101          AAA           Aaa
                  Capital Outlay Bonds, 1993 Series C, 5.50% Due 6/1/23.
                  (General Obligation Bonds.)
     525,000    Florida Municipal Power Agency, St, Lucie Project Refunding        2002 at 102          AAA           Aaa
                  Revenue Bonds, Series 1992, 5.25% Due 10/1/21. (Original
                  issue discount bonds delivered on or about September 1,
                  1992 at a price of 91.655% of principal amount.)
     525,000    Dade County Health Facilities Authority (Florida), Hospital        2003 at 101          AAA           Aaa
                  Revenue Refunding Bonds, Series 1993A (Baptist Hospital of
                  Miami Project), 5.25% Due 5/15/21. (Original issue
                  discount bonds delivered on or about March 17, 1993 at a
                  price of 94.118% of principal amount.)
     525,000    Hillsborough County Aviation Authority, Florida, Tampa             2003 at 102          AAA           Aaa
                  International Airport Revenue Refunding, 1993 Series B,
                  5.60% Due 10/1/19.
     325,000    Hillsborough County Industrial Development Authority               2004 at 102          AAA           Aaa
                  (Florida), Industrial Development Revenue Bonds, Series
                  1994 (University Community Hospital), 5.75% Due 8/15/14.
                  (When issued.)
     160,000    Orlando Utilities Commission (Florida), Water and Electric         2002 at 101          AAA           Aaa
                  Revenue Bonds, Series 1993, 5.125% Due 10/1/19.
     500,000    Pinellas County (Florida), Health Facilities Authority             2003 at 102          AAA           Aaa
                  Hospital Revenue Bonds, Series 1993 (Morton Plant Health
                  System Project), 5.625% Due 11/15/23.
     525,000    Commonwealth of Puerto Rico, Public Improvement Refunding          2002 at 101          AAA           Aaa
                  Bonds, Series 1992A (General Obligation Bonds.), 6.00% Due           1/2
                  7/1/14.
  ----------
  $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>
50-999                 $5,000-$99,999   4.90 %   $    100.64     (5.31%)  5.33%     (5.35%)  5.36%     (5.36%)  5.38%
1,000-2,499           100,000-249,999   4.50          100.22     (5.34)   5.35      (5.37)   5.38      (5.39)   5.40
2,500-4,999           250,000-499,999   4.25           99.96     (5.35)   5.37      (5.38)   5.40      (5.40)   5.42
5,000-9,999           500,000-999,999   3.50           99.18     (5.39)   5.41      (5.42)   5.44      (5.44)   5.46
10,000 and over    1,000,000 and over   3.00           98.67     (5.42)   5.44      (5.45)   5.47      (5.47)   5.49
</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>
50-999                 $5,000-$99,999   4.90 %   $    100.64          5.39%            5.42%            5.44%
1,000-2,499           100,000-249,999   4.50          100.22          5.42             5.44             5.46
2,500-4,999           250,000-499,999   4.25           99.96          5.43             5.46             5.47
5,000-9,999           500,000-999,999   3.50           99.18          5.47             5.50             5.52
10,000 and over    1,000,000 and over   3.00           98.67          5.50             5.53             5.55
</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
Florida Insured Trust                                    1994                                  1995                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        6/1            8/1           11/1            2/1            5/1
Distribution Date.....................       6/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .3016(1)                                                               $  5.3638
                                                             --------    $.4469 every month    --------
Quarterly Distribution Plan...........  $   .3016(1)   $   .8993(2)   $  1.3489      $  1.3489      $  1.3489      $  5.3958
Semi-Annual Distribution Plan.........  $   .3016(1)                  $  2.2561(3)                  $  2.7074      $  5.4148
- ---------------------------------------------------------------------------------------------------------------------------------
<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.
(2) The second distribution under the quarterly distribution plan represents a 2-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 5-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 $.01490 per unit per day.
Consequently, on the first Record Date (06/01/94), accrued interest will total
$1.1026 per unit for the 74-day period. Because a substantial portion of this
interest will not yet be due from the issuers of the bonds in the Fund, the
first payment to all Unitholders of Record on 06/01/94 is $.3016, and the
remaining $.8010 of accrued interest will remain an asset of the Trust and be
distributed in subsequent periods as portfolio bonds mature, or are redeemed, or
sold and the accrued interest on these bonds is collected. After the first
Record Date daily rates of accrual are:
              Monthly - $0.01490              Quarterly - $0.01499
                             Semi-Annual - $0.01504
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.
 
- --------------------------------------------------------------------------------
 
                                                          720
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 25.8 years.
The first bond is scheduled to mature in July, 2014, with the last bond maturity
being November, 2023.
 
- -------------------------------------------------
 
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
 
                                 1-800-351-4100
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     MASSACHUSETTS
     INSURED
     TRUST 111
 
            Estimated Current Return
            5.38% to 5.54%
            as of 03/16/94
 
            Estimated Long Term Return
            5.41% to 5.57%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  670946 706 Monthly Payment Option
                  670946 714 Quarterly Payment Option
                  670946 722 Semi-Annual Payment Option
 
                  Registered in Massachusetts
                    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, MASSACHUSETTS INSURED TRUST 111
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT MARCH 17, 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    Massachusetts Bay Transportation Authority, General                2002 at 102          AAA           Aaa
                  Transportation System Bonds, 1992 Series C, 6.10% Due
                  3/1/23. (General Obligation Bonds.)
     500,000    Massachusetts Health and Educational Facilities Authority,         2003 at 102          AAA           Aaa
                  Revenue Bonds, Lahey Clinic Medical Center Issue, Series
                  B, 5.375% Due 7/1/23. (Original issue discount bonds
                  delivered on or about April 27, 1993 at a price of 94.511%
                  of principal amount.)
     525,000    Massachusetts Health and Educational Facilities Authority,         2003 at 102          AAA           Aaa
                  Revenue Bonds, Massachusetts General Hospital Issue,
                  Series G, 5.25% Due 7/1/23.
     500,000    Massachusetts Health and Educational Facilities Authority,         2004 at 102          AAA           Aaa
                  Revenue Bonds, New England Medical Center Hospitals Issue,
                  Series G-1, 5.375% Due 7/1/24.
     525,000    Massachusetts Turnpike Authority, Turnpike Revenue Bonds,          2003 at 102          AAA           Aaa
                  1993 Series A, 5.125% Due 1/1/23.
     500,000    Massachusetts Port Authority, Revenue Bonds, Series 1992-B,        2003 at 102          AAA           Aaa
                  6.00% Due 7/1/23.
     450,000    Commonwealth of Puerto Rico, Public Improvement Refunding          2002 at 101          AAA           Aaa
                  Bonds, Series 1992A (General Obligation Bonds.), 6.00% Due           1/2
                  7/1/14.
  ----------
  $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>
50-999                 $5,000-$99,999   4.90 %   $    100.67          5.38%            5.41%            5.43%
1,000-2,499           100,000-249,999   4.50          100.25          5.40             5.44             5.45
2,500-4,999           250,000-499,999   4.25           99.99          5.42             5.45             5.47
5,000-9,999           500,000-999,999   3.50           99.21          5.46             5.49             5.51
10,000 and over    1,000,000 and over   3.00           98.70          5.49             5.52             5.54
</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>
50-999                 $5,000-$99,999   4.90 %   $    100.67          5.41%            5.44%            5.46%
1,000-2,499           100,000-249,999   4.50          100.25          5.43             5.46             5.48
2,500-4,999           250,000-499,999   4.25           99.99          5.45             5.47             5.49
5,000-9,999           500,000-999,999   3.50           99.21          5.49             5.52             5.54
10,000 and over    1,000,000 and over   3.00           98.70          5.52             5.55             5.57
</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
Massachusetts Insured Trust                              1994                                  1995                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        6/1            8/1           11/1            2/1            5/1
Distribution Date.....................       6/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .3773(1)                                                               $  5.4169
                                                             --------    $.4514 every month    --------
Quarterly Distribution Plan...........  $   .3773(1)   $   .9081(2)   $  1.3622      $  1.3622      $  1.3622      $  5.4489
Semi-Annual Distribution Plan.........  $   .3773(1)                  $  2.2782(3)                  $  2.7339      $  5.4679
- ---------------------------------------------------------------------------------------------------------------------------------
<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.
(2) The second distribution under the quarterly distribution plan represents a 2-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 5-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 $.01505 per unit per day.
Consequently, on the first Record Date (06/01/94), accrued interest will total
$1.1137 per unit for the 74-day period. Because a substantial portion of this
interest will not yet be due from the issuers of the bonds in the Fund, the
first payment to all Unitholders of Record on 06/01/94 is $.3773, and the
remaining $.7364 of accrued interest will remain an asset of the Trust and be
distributed in subsequent periods as portfolio bonds mature, or are redeemed, or
sold and the accrued interest on these bonds is collected. After the first
Record Date daily rates of accrual are:
              Monthly - $0.01505              Quarterly - $0.01514
                             Semi-Annual - $0.01519
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.
 
- --------------------------------------------------------------------------------
 
                                                          720
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 28.2 years.
The first bond is scheduled to mature in July, 2014, with the last bond maturity
being July, 2024.
 
- -------------------------------------------------
 
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
 
                                 1-800-351-4100
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     MICHIGAN
     INSURED
     TRUST 53
 
            Estimated Current Return
            5.31% to 5.47%
            as of 03/16/94
 
            Estimated Long Term Return
            5.42% to 5.58%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  67095E 104 Monthly Payment Option
                  67095E 112 Quarterly Payment Option
                  67095E 120 Semi-Annual Payment Option
 
                  Registered in Michigan
                    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, MICHIGAN INSURED TRUST 53
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT MARCH 17, 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>
  --------------------------------------------------------------------------------------------------------------------------
  $  525,000    Michigan State Housing Development Authority, Limited              2004 at 102          AAA           Aaa
                  Obligation Revenue Bonds (Charter Square Project), Series
                  1994, 5.50% Due 1/15/21.
     525,000    State of Michigan, State Trunk Line Fund Refunding Bonds,          2002 at 100          AAA           Aaa
                  Series 1992B-2, 5.50% Due 10/1/21. (Original issue
                  discount bonds delivered on or about July 30, 1992 at a
                  price of 90.625% of principal amount.)
     525,000    Chippewa Valley Schools, County of Macomb, State of                2003 at 102          AAA           Aaa
                  Michigan, 1993 Refunding Bonds, 5.00% Due 5/1/21.
                  (Original issue discount bonds delivered on or about
                  September 7, 1993 at a price of 91.867% of principal
                  amount.)(General Obligation Bonds.)
     375,000    The City of Grand Haven, Michigan, Electric System Revenue         2003 at 102          AAA           Aaa
                  Refunding Bonds, 1993 Series, 5.25% Due 7/1/13.
     525,000    City of Kalamazoo Hospital Finance Authority (Michigan),           2004 at 102          AAA           Aaa
                  Hospital Revenue Refunding Bonds (Borgess Medical Center),
                  Series 1994A, 5.25% Due 6/1/17.
     525,000    Warren Consolidated Schools, Counties of Macomb and Oakland,       2003 at 102          AAA           Aaa
                  State of Michigan, 1993 Refunding Bonds, 5.50% Due 5/1/21.
                  (General Obligation Bonds.)
     500,000    Commonwealth of Puerto Rico, Public Improvement Refunding          2002 at 101          AAA           Aaa
                  Bonds, Series 1992A (General Obligation Bonds.), 6.00% Due           1/2
                  7/1/14.
  ----------
  $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>
50-999                 $5,000-$99,999   4.90 %   $     99.01          5.31%            5.34%            5.36%
1,000-2,499           100,000-249,999   4.50           98.60          5.33             5.36             5.38
2,500-4,999           250,000-499,999   4.25           98.34          5.35             5.38             5.40
5,000-9,999           500,000-999,999   3.50           97.58          5.39             5.42             5.44
10,000 and over    1,000,000 and over   3.00           97.07          5.42             5.45             5.47
</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>
50-999                 $5,000-$99,999   4.90 %   $     99.01          5.42%            5.45%            5.47%
1,000-2,499           100,000-249,999   4.50           98.60          5.44             5.47             5.49
2,500-4,999           250,000-499,999   4.25           98.34          5.46             5.48             5.50
5,000-9,999           500,000-999,999   3.50           97.58          5.50             5.53             5.55
10,000 and over    1,000,000 and over   3.00           97.07          5.53             5.56             5.58
</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
Michigan Insured Trust                                   1994                                  1995                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        6/1            8/1           11/1            2/1            5/1
Distribution Date.....................       6/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .4380(1)                                                               $  5.2570
                                                             --------    $.4380 every month    --------
Quarterly Distribution Plan...........  $   .4380(1)   $   .8815(2)   $  1.3222      $  1.3222      $  1.3222      $  5.2890
Semi-Annual Distribution Plan.........  $   .4380(1)                  $  2.2116(3)                  $  2.6540      $  5.3080
- ---------------------------------------------------------------------------------------------------------------------------------
<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.
(2) The second distribution under the quarterly distribution plan represents a 2-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 5-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 $.01460 per unit per day.
Consequently, on the first Record Date (06/01/94), accrued interest will total
$1.0804 per unit for the 74-day period. Because a substantial portion of this
interest will not yet be due from the issuers of the bonds in the Fund, the
first payment to all Unitholders of Record on 06/01/94 is $.4380, and the
remaining $.6424 of accrued interest will remain an asset of the Trust and be
distributed in subsequent periods as portfolio bonds mature, or are redeemed, or
sold and the accrued interest on these bonds is collected. After the first
Record Date daily rates of accrual are:
              Monthly - $0.01460              Quarterly - $0.01469
                             Semi-Annual - $0.01474
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.
 
- --------------------------------------------------------------------------------
 
                                                          720
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 24.7 years.
The first bond is scheduled to mature in July, 2013, with the last bond maturity
being October, 2021.
 
- -------------------------------------------------
 
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
 
                                 1-800-351-4100
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     NEW JERSEY
     INSURED
     TRUST 173
 
            Estimated Current Return
            First
            Year: 5.22% to 5.37%
            Subsequent
            Years: 5.24% to 5.40%
            as of 03/16/94
 
            Estimated Long Term Return
            5.31% to 5.46%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  6706L6 224 Monthly Payment Option
                  6706L6 232 Quarterly Payment Option
                  6706L6 240 Semi-Annual Payment Option
 
                  Registered in New Jersey
                    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 JERSEY INSURED TRUST 173
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT MARCH 17, 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    New Jersey Building Authority, State Building Revenue Bonds,       2003 at 102          AAA           Aaa
                  1994 Series, 5.00% Due 6/15/17.
     500,000    New Jersey Health Care Facilities Financing Authority,             2003 at 102          AAA           Aaa
                  Revenue Bonds, The Mountainside Hospital Issue, Series
                  1993, 5.50% Due 7/1/14.
     500,000    New Jersey Health Care Facilities, Financing Authority             2003 at 102          AAA           Aaa
                  Revenue Bonds, Allegany Health System-Our Lady of Lourdes
                  Medical Center Issue, Series 1993, 5.20% Due 7/1/18.
     425,000    New Jersey Health Care Facilities Financing Authority,             2004 at 102          AAA           Aaa
                  Revenue Bonds, Riverview Medical Center Issue, Series
                  1994, 5.50% Due 7/1/18. (When issued.)
     525,000    New Jersey Sports and Exposition Authority, State Contract         2003 at 101          AAA           Aaa
                  Bonds, 1993 Series A, 5.50% Due 9/1/23.
     525,000    The Pollution Control Financing Authority of Salem County          2003 at 102          AAA           Aaa
                  (New Jersey), Pollution Control Revenue Refunding Bonds,
                  1993 Series C (Public Service Electric and Gas Company
                  Project), 5.55% Due 11/1/33.
     525,000    Commonwealth of Puerto Rico, Public Improvement Refunding          2002 at 101          AAA           Aaa
                  Bonds, Series 1992A (General Obligation Bonds.), 6.00% Due           1/2
                  7/1/14.
  ----------
  $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>
50-999                 $5,000-$99,999   4.90 %   $    101.00     (5.22%)  5.24%     (5.25%)  5.27%     (5.27%)  5.29%
1,000-2,499           100,000-249,999   4.50          100.58     (5.24)   5.26      (5.27)   5.29      (5.29)   5.31
2,500-4,999           250,000-499,999   4.25          100.31     (5.25)   5.28      (5.29)   5.31      (5.31)   5.33
5,000-9,999           500,000-999,999   3.50           99.53     (5.30)   5.32      (5.33)   5.35      (5.35)   5.37
10,000 and over    1,000,000 and over   3.00           99.02     (5.32)   5.35      (5.36)   5.38      (5.37)   5.40
</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>
50-999                 $5,000-$99,999   4.90 %   $    101.00          5.31%            5.34%            5.35%
1,000-2,499           100,000-249,999   4.50          100.58          5.33             5.36             5.38
2,500-4,999           250,000-499,999   4.25          100.31          5.34             5.37             5.39
5,000-9,999           500,000-999,999   3.50           99.53          5.39             5.41             5.43
10,000 and over    1,000,000 and over   3.00           99.02          5.41             5.44             5.46
</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
New Jersey Insured Trust                                 1994                                  1995                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        6/1            8/1           11/1            2/1            5/1
Distribution Date.....................       6/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .3247(1)                                                               $  5.2931
                                                             --------    $.4410 every month    --------
Quarterly Distribution Plan...........  $   .3247(1)   $   .8875(2)   $  1.3312      $  1.3312      $  1.3312      $  5.3251
Semi-Annual Distribution Plan.........  $   .3247(1)                  $  2.2267(3)                  $  2.6720      $  5.3441
- ---------------------------------------------------------------------------------------------------------------------------------
<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.
(2) The second distribution under the quarterly distribution plan represents a 2-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 5-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 $.01470 per unit per day.
Consequently, on the first Record Date (06/01/94), accrued interest will total
$1.0878 per unit for the 74-day period. Because a substantial portion of this
interest will not yet be due from the issuers of the bonds in the Fund, the
first payment to all Unitholders of Record on 06/01/94 is $.3247, and the
remaining $.7631 of accrued interest will remain an asset of the Trust and be
distributed in subsequent periods as portfolio bonds mature, or are redeemed, or
sold and the accrued interest on these bonds is collected. After the first
Record Date daily rates of accrual are:
              Monthly - $0.01470              Quarterly - $0.01479
                             Semi-Annual - $0.01484
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.
 
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                                                          720
<PAGE>
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AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 26.0 years.
The first bond is scheduled to mature in July, 2014, with the last bond maturity
being November, 2033.
 
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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.
 
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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.
 
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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
 
                                 1-800-351-4100
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.


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