PAINEWEBBER EQUITY TRUST GROWTH STOCK SERIES 21
485BPOS, 1999-05-03
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                                                    File No. 333-35615
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                         POST EFFECTIVE AMENDMENT NO. 1
                                       TO
                                    FORM S-6
  For Registration Under the Securities Act of 1933 of Securities of
  Unit Investment Trusts Registered on Form N-8B-2.
  A.  Exact name of Trust:
      PAINEWEBBER EQUITY TRUST, GROWTH STOCK 
      SERIES 21
  B.  Name of Depositor:
      PAINEWEBBER INCORPORATED
  C.  Complete address of Depositor's principal executive office:
      PAINEWEBBER INCORPORATED
      1285 Avenue of the Americas
      New York, New York 10019
  D.  Name and complete address of agents for service:
      PAINEWEBBER INCORPORATED
      Attention: Mr. Robert E. Holley
      1200 Harbor Blvd.
      Weehawken, New Jersey 07087
  (x) Check if it is proposed that this filing should become effective        
      (immediately upon filing or on April 29, 1999) pursuant to paragraph    
      (b) of Rule 485.                                                        
  E.  Total and amount of securities being registered:                        
      An indefinite number of units of Beneficial Interest pursuant to Rule   
      24f-2 under the Investment Company Act of 1940.                         
  F.  Proposed maximum offering price to the public of the securities being   
      registered:                                                             
      Indefinite pursuant to Rule 24f-2
  G.  Amount of filing fee, computed at one-thirty-fourth of 1 percent of the
      proposed maximum aggregate offering price to the public:
      In accordance with Rule 24f-2, a fee in the amount of $19,973.48 was
      paid on March 29, 1999 in connection with the filing of the Rule 24f-2
      Notice for the Trust's most recent fiscal year.
  H.  Approximate date of proposed sale to public:
      AS SOON AS PRACTICABLE AFTER THE EFFECTIVE DATE OF THE
      REGISTRATION STATEMENT.
    
                          PAINEWEBBER EQUITY TRUST,
                           GROWTH STOCK SERIES 21
Cross Reference Sheet
       Pursuant to Rule 404(c) of Regulation C under the Securities Act of
                                      1933
        (Form N-8B-2 Items required by Instruction 1 as to Prospectus on
                                    Form S-6)
  Form N-8B-2                                                          Form S-6
  Item Number                                             Heading in Prospectus
  I.       Organization and General Information
  1.    (a)Name of Trust                )  Front Cover
        (b)Title of securities issued   )
  2.    Name and address of             )  Back Cover
        Depositor
  3.    Name and address of             )  Back Cover
        Trustee
  4.    Name and address of             )  Back Cover
        Principal
        Underwriter                     )
  5.    Organization of Trust           )  The Trust
  6.    Execution and                   )  The Trust
        termination of
        Trust Agreement                 )  Termination of the Trust
  7.    Changes of name                 )  *
  8.    Fiscal Year                     )  *
  9.    Litigation                      )  *
  II.       General Description of the Trust and Securities of the Trust
  10.   General Information             )  The Trust;
        regarding
        Trust's Securities and          )  Rights of Unit
        Rights
        of Holders                      )  holders
  (a)   Type of Securities              )  The Trust
        (Registered or Bearer)          )
  (b)   Type of Securities              )  The Trust
        (Registered or Bearer)          )
  *     Not applicable, answer
        negative or not required.
  (c)   Rights of Holders as to         )  Rights of Unit
        Withdrawal or                   )  holders
        Redemption
                                        )  Redemption;
                                        )  Public Offering of Units-
                                        )  Secondary Market for Units
  (d)   Rights of Holders as to         )  Secondary Market for
        conversion, transfer, etc.      )  Units Exchange Option
  (e)   Rights of Trust issues          )
        periodic payment plan           )  *
        certificates                    )
  (f)   Voting rights as to             )  Rights of Unit
        Securi-
        ties, under the Indenture       )  holders
  (g)   Notice to Holders as to         )
        change in                       )
        (1)Assets of Trust              )  Amendment of the
                                           Indenture
        (2)Terms and Conditions         )  Administration of the
                                           Trust-Portfolio Supervision
           of Trust's Securities        )  Investments
        (3)Provisions of Trust          )  Amendment of the
                                           Indenture
        (4)Identity of Depositor and    )  Administration of the Trust
           Trustee
  (h)   Consent of Security             )
        Holders
        required to change              )
        (1)Composition of assets        )  Amendment of the
                                           Indenture
           of Trust                     )
        (2)Terms and conditions         )  Amendment of the
                                           Indenture
           of Trust's Securities        )
        (3)Provisions of Indenture      )  Amendment of the
                                           Indenture
        (4)Identity of Depositor        )  Administration of the Trust
           and Trustee                  )
  11.   Type of Securities              )  The Trust
        Comprising Units
  12.   Type of securities              )  *
        comprising
        periodic payment                )
        certificates
  13.   (a)Load, fees, expenses, etc.   )  Public Offering of
                                        )  Units; Expenses of the
                                        )  Trust
  *     Not applicable, answer
        negative or not required.
        (b)Certain information          )  *
           regarding periodic payment   )  *
           certificates                 )
        (c)Certain percentages          )  *
        (d)Certain other fees, etc.     )  Expenses of the Trust
           payable by holders           )  Rights of Unitholders
        (e)Certain profits receivable   )  Public Offering of
           by depositor, principal      )  Units
           underwriters, trustee or     )  Public Offering of Units
           affiliated persons           )  Market for Units
        (f)Ratio of annual charges to   )  *
           income                       )
  14.   Issuance of Trust's             )  The Trust
        securities
                                        )  Public Offering of Units
  15.   Receipt and handling of         )  *
        payments from                   )
        purchasers
  16.   Acquisition and                 )  The Trust; Administration
        disposition of
        underlying securities           )  of the Trust; Termination
                                        )  of Trust
  17.   Withdrawal or                   )  Redemption
        redemption
                                        )  Public offering of Units
                                        )  -Secondary Market for
                                        )  -Exchange Option
                                        )  -Conversion Option
  18.   (a)Receipt and disposition of   )  Distributions of
           income                       )  Unitholders
        (b)Reinvestment of              )  *
           distributions
        (c)Reserves or special fund     )  Distributions to
                                        )  Unitholders; Expenses of
                                           Trust
        (d)Schedule of distribution     )  *
  19.   Records, accounts and           )  Distributions
        report
                                        )  Administration
                                        )  of the Trust
  20.   Certain miscellaneous           )  Administration of the Trust
        pro-
        visions of Trust                )
        agreement
  21.   Loans to security               )  *
        holders
  22.   Limitations on liability        )  Sponsor, Trustee
  23.   Bonding arrangements            )  Included in Form N-8B-2
  24.   Other material                  )  *
        provisions of
        trust agreement                 )
  *     Not applicable, answer
        negative or not required.
  III.        Organization
  Personnel and        Affiliated
  Persons of Depositor
  25.   Organization of                 )  Sponsor
        Depositor
  26.   Fees received by                )  Public Offering of
        Depositor
                                        )  Units Expenses of the Trust
  27.   Business of Depositor           )  Sponsor
  28.   Certain information as to       )  Sponsor
        officials and affiliated        )
        persons of Depositor            )
  29.   Voting securities of            )  *
        Depositor
  30.   Persons controlling             )  Sponsor
        Depositor
  31.   Payments by Depositor           )  *
        for
        certain other services          )
        rendered to Trust               )
  32.   Payments by Depositor           )  *
        for
        certain other services          )
        rendered to Trust               )
  33.   Remuneration of                 )  *
        employees of
        Depositor for certain           )
        services
        rendered to Trust               )
  34.   Remuneration of other           )  *
        persons
        for certain services            )
        rendered
        to Trust                        )
  IV.        Distribution and Redemption of Securities
  35.   Distribution of Trust's         )  Public Offering of Units
        securities by states            )
  36.   Suspension of sales of          )  *
        Trust's
        securities                      )
  37.   Revocation of authority         )  *
        to
        distribute                      )
  38.   (a)Method of distribution       )  Public Offering of Units
        (b)Underwriting agreements      )
        (c)Selling agreements           )  Sponsor
  *     Not applicable, answer
        negative or not required.
  39.   (a)Organization of principal    )  Sponsor
           underwriter                  )
        (b)N.A.S.D. membership of       )  Sponsor
           principal underwriter        )
  40.   Certain fees received by        )  Public Offering Price of
        principal underwriter           )  Units
  41.   (a)Business of principal        )  Sponsor
           underwriter                  )
        (b)Branch officers of           )  *
           principal underwriter        )
        (c)Salesman of principal        )  *
           underwriter                  )
  42.   Ownership of Trust's            )  *
        securities
        by certain persons              )
  43.   Certain brokerage               )  *
        commissions
        received by principal           )
        underwriter                     )
  44.   (a)Method of valuation          )  Public Offering Price of
                                        )  Units
        (b)Schedule as to offering      )  *
           price                        )
        (c)Variation in Offering        )  Public Offering Price of
           price to certain persons     )  Units
  45.   Suspension of                   )  *
        redemption rights
  46.   (a)Redemption valuation         )  Public Offering of Units
                                        )  -Secondary Market for Units
                                        )  -Valuation
        (b)Schedule as to redemption    )
           price                        )
  V.        Information concerning the Trustee or Custodian
  47.   Maintenance of position         )  Public Offering of Units
        in
        underlying securities           )  Redemption
                                        )  Trustee
                                        )  Evaluation of the Trust
  48.   Organization and                )
        regulation of
        Trustee                         )  Trustee
  49.   Fees and expenses of            )  Expenses of the Trust
        Trustee
  50.   Trustee's lien                  )  Expenses of the Trust
  *     Not applicable, answer
        negative or not required.
  VI.        Information
  concerning Insurance of
  Holders of Securities
  51.   (a)Name and address of          )  *
           Insurance Company            )
        (b)Type of policies             )  *
        (c)Type of risks insured and    )  *
           excluded                     )
        (d)Coverage of policies         )  *
        (e)Beneficiaries of policies    )  *
        (f)Terms and manner of          )  *
           cancellation                 )
        (g)Method of determining        )  *
           premiums                     )
        (h)Amount of aggregate          )  *
           premiums paid                )
        (i)Who receives any part of     )  *
           premiums                     )
        (j)Other material provisions    )  *
           of the Trust relating to     )
           insurance                    )
  VII.       Policy of Registrant
  52.   (a)Method of selecting and      )  The Trust;
           eliminating securities       )  Administration of the Trust
           from the Trust               )
        (b)Elimination of securities    )  *
           from the Trust               )
        (c)Policy of Trust regarding    )  Portfolio Supervision
                                        )  Administration of Trust
           substitution and
           elimination of securities    )
        (d)Description of any funda-    )  Administration of
           mental policy of the Trust   )  Trust
                                        )  Portfolio Supervision
  53.   (a)Taxable status of the        )  Tax status of the Trust
           Trust                        )
        (b)Qualification of the Trust   )  Tax status of the Trust
           as a mutual investment       )
           company                      )
  *     Not applicable, answer
        negative or not required.
  VIII.       Financial and
  Statistical Information
  54.   Information regarding           )  *
        the
        Trust's past ten fiscal         )
        years
  55.   Certain information             )  *
        regarding
        periodic payment plan           )
        certificates                    )
  56.   Certain information             )  *
        regarding
        periodic payment plan           )
        certificates                    )
  57.   Certain information             )  *
        regarding
        periodic payment plan           )
        certificates                    )
  58.   Certain information             )  *
        regarding
        periodic payment plan           )
        certi-
        ficates                         )
  59.   Financial statements            )  Statement of Financial
        (Instruction 1(c) to            )  Condition
        Form S-6)
  *     Not applicable, answer
        negative or not required.
   
                PAINEWEBBER EQUITY TRUST
            GROWTH STOCK SERIES TWENTY ONE
                     (Power Grab)
             (A Unit Investment Trust)
                    7,754,832 Units
Portfolio of Common Stocks

Designed for Above-Average Capital Appreciation

Annual Capital Distributions

This Prospectus consists of two parts: Part A and 
Part B. Parts A and B should both be attached for 
this Prospectus to be complete.

The Securities and Exchange Commission has not 
approved or disapproved these Securities or 
passed upon the adequacy of this prospectus.  Any 
representation to the contrary is a criminal 
offense.

SPONSOR:
PAINEWEBBER INCORPORATED
PROSPECTUS PART A DATED APRIL 29, 1999

No person is authorized to give any information 
or make any representations about this Trust not 
contained in this Prospectus, and you should not 
rely on any other information. Read and keep both 
parts of this prospectus for future reference.
Table of Contents    
Part A                                    Page
Brief Description of the Trust's 
 Investment Portfolio...........  ......  A - 3 
Is this Trust Appropriate for You?        A - 4 
Summary of Risks.                         A - 4 
Essential Information Regarding the Trust A - 6 
Report of Independent Auditors.           A - 7 
Statement of Financial Condition          A - 8 
Statement of Operations                   A - 9 
Statement of Changes in Net Assets        A - 10
Notes to Financial Statements             A - 11
Schedule of Investments                   A - 12
Part B
The Composition of the Trust's Portfolio  B - 1 
About the Trust...........................B - 1 
Risk Factors and Special Considerations...B - 3 
Federal Income Taxes......................B - 4 
Public Offering of Units..................B - 5 
   Public Offering Price..................B - 5 
   Sales Charge and Volume Discount.......B - 5 
   Employee Discount......................B - 6 
   Exchange Option........................B - 6 
   Conversion Option......................B - 7 
   Distribution of Units..................B - 8 
   Secondary Market for Units.............B - 8 
   Sponsor's Profits......................B - 8 
Redemption................................B - 9 
Valuation.................................B - 10
Comparison of Public Offering Price and
  Redemption Value..................      B - 10
Expenses of the Trust.....................B - 10
Rights of Unitholders.....................B - 11
Distributions.............................B - 12
Reinvestment Plan.........................B - 12
Administration of the Trust...............B - 12
   Accounts...........................    B - 12
   Reports and Records....................B - 13
   Portfolio Supervision..................B - 13
Amendment of the Indenture................B - 14
Termination of the Trust..................B - 14
Sponsor...................................B - 14
Trustee...................................B - 15
Independent Auditors......................B - 15
Legal Opinions..........................  B - 15

PAINEWBBER EQUITY TRUST, GROWTH STOCK SERIES 
TWENTY ONE
(Power Grab)  -  PART A

Brief Description of the Trust's Investment 
Portfolio

1. The Trust's Objective.

The Trust seeks to provide capital appreciation 
through an investment primarily in a portfolio of 
common stocks issued by a variety of domestic 
companies.

PaineWebber selected the stocks in the Trust's 
Portfolio on January 8, 1998 by choosing stocks 
it believed were "growth stocks", meaning those 
stocks whose earnings growth rate is greater than 
that of the market as a whole, as measured 
against the Standard & Poor's 500 Index*.

PaineWebber chose these stocks for their capital 
appreciation potential, not for their income 
potential. Many of the stocks currently pay 
little or no dividend income.

As of December 31, 1998, 100% of the Trust's 
Portfolio was invested in common stocks as 
described briefly below.

2. Brief Description of the Trust's Portfolio.

The Trust plans to hold until its termination a 
diversified portfolio of stocks which PaineWebber 
selected on January 8, 1998, the first day of the 
Trust. As of that date, PaineWebber believed that 
the stocks selected were issued by companies 
which presented attractive opportunities as 
potential acquisition candidates. PaineWebber 
identified two major ways, as of January 8, 1998, 
to invest in the trend towards strong merger & 
acquisition activity: by investing in companies 
that (a) are adept at growing via acquisition and 
(b) are likely to be acquired at a premium to 
their market prices. Unless terminated sooner, 
the Trust is scheduled to terminate on January 
30, 2003 regardless of market conditions at the 
time.

The Trust is a unit investment trust which means 
that, unlike a mutual fund, the Trust's Portfolio 
is not managed and stocks are not sold because of 
market changes.

On December 31, 1998, the aggregate market value 
of the Trust Portfolio was $67,144,041. The 
common stocks in the Trust's Portfolio have been 
issued by companies who receive income and derive 
revenues from multiple industry sources, but 
whose primary industry is listed in the "Schedule 
of Investments" in this Prospectus Part A.
                               Approximate Percent
                               of Aggregate 
                               Market Value
Primary Industry Source        of the Trust
Appliances                         .27%     
Applications Software            4.25%      
Auto/Truck Parts & Equipment     5.05%      
Cellular Communication           1.46%      
Computers                        2.25%      
Containers                       3.29%      
Data Processing/Management         .47%     
Direct Marketing                 2.42%      
Drug Delivery Systems            1.65%      
                               (Continued) 

* The Standard & Poor's 500 Index is an unmanaged 
index which, in PaineWebber's opinion, 
constitutes a broadly diversified, representative 
segment of the market of publicly traded stocks 
in the United States.
                               Approximate Percent
                               of Aggregate 
                               Market Value
Primary Industry Source        of the Trust
Electric                         6.17%       
Electronics                      3.59%       
Finance                          7.95%       
Food                             1.94%       
Gas Distribution                 3.25%       
Internet Software              10.24%        
Machinery                        1.27%       
Medical                        14.25%        
Networking Products              9.10%       
Oil                              2.95%       
Publishing                       3.13%       
Seismic Data Collection            .61%      
Soap & Cleaning Preparations     4.38%       
Telecommunications             10.06%        

Is this Trust Appropriate for You?

Yes, if you are seeking capital 
appreciation over the life of the Trust by 
investing in common stocks issued by companies 
which PaineWebber selected for their growth 
potential. You will benefit from a professionally 
selected portfolio whose risk is reduced by 
investing in stocks of several different issuers.

No, if you want a speculative investment 
that changes to take advantage of market 
movements, if you are unable or unwilling to 
assume the risks involved generally with equity 
investments or if you need current income.

Summary of Risks

You can lose money by investing in the 
Trust.  This can happen for various reasons.  A 
further discussion of the risks summarized below 
can be found in Part B of this Prospectus.

1. Risks of Investing in the Trust

Certain risks are involved with an 
investment in a unit trust which holds common 
stocks. For example:

The Trust, unlike a mutual fund, is not "managed" 
and stocks will not be sold by the Trust to take 
advantage of market fluctuations.

The Trust Portfolio may not remain constant 
during the life of the Trust. The Trustee may be 
required to sell stocks to pay Trust expenses, to 
tender stocks under certain circumstances or to 
sell stocks in the event certain negative events 
occur.

The sale of stocks from the Trust in the period 
prior to termination and upon termination may 
result in a lower amount than might otherwise be 
realized if such sale were not required at such 
time due to impending or actual termination of 
the Trust. For this reason, among others, the 
amount you receive upon termination may be less 
than the amount you paid.

If many investors sell their Units, the Trust 
will have to sell stocks. This could reduce the 
diversification of your investment and increase 
your share of Trust expenses.

The price of your Units depends upon the full 
range of economic and market influences including 
the prices of equity securities, the condition of 
the stock markets and other economic influences 
that affect the global or United States economy.

Assuming no changes occur in the prices of the 
stocks held by the Trust, the price you paid for 
your Units will generally be less than the price 
you paid because your purchase price included a 
sales charge.

The stocks in the Trust's Portfolio will 
generally trade on a domestic stock exchange or 
in the over-the-counter market. PaineWebber 
cannot assure you that a liquid trading market 
will exist. The value of the Trust's Portfolio, 
and of your investment, may be reduced if trading 
in one or more stocks is limited or absent.

Additional stocks and Treasury obligations may be 
acquired by the Trust when additional Units are 
to be offered to the public. Costs incurred in 
acquiring such additional stocks and Treasury 
obligations will be borne by the Trust. 
Unitholders will experience a dilution of their 
investment as a result of such brokerage fees and 
other expenses paid by the Trust during the 
additional deposits of securities purchased by 
the Trustee with cash or cash equivalents.

2. Risks of Investing in Stocks

Investing always involves risk. The risks 
described below are the most significant risks 
associated with investing in the stocks held by 
the Trust.

Holders of common stocks such as those held by 
the Trust have rights that are generally inferior 
to the holders of debt obligations or preferred 
stocks.

Common stocks are not obligations of the issuer. 
Therefore, they do not provide any assurance of 
income or provide the degree of protection of 
debt securities.

The stocks held by the Trust can be expected to 
fluctuate in value depending on a wide variety of 
factors, such as economic and market influences 
affecting corporate profitability, financial 
condition of issuers, changes in worldwide or 
national economic conditions, the prices of 
equity securities in general and the Trust's 
stocks in particular.

Year 2000 Problem Risk

Many computer systems were designed in such a way 
that they may be unable to distinguish between 
the year 2000 and the year 1900 and therefore may 
not properly process and calculate date-related 
information and data (commonly known as the "Year 
2000 Problem"). As with all investment and 
financial companies, the Year 2000 Problem may 
have an adverse impact upon the Trust. The 
Sponsor and the Trustee are taking steps to 
address the year 2000 Problem with respect to the 
computer systems they use and to obtain 
reasonable assurances that similar steps are 
being taken by the Trust's other service 
providers. At this time, however, there can be no 
assurance that these steps will be sufficient to 
avoid any adverse impact to the Trust. The year 
2000 Problem is expected to have an impact on all 
corporations, including those whose stocks are 
contained in the Trust's Portfolio. The Sponsor 
cannot predict what impact, if any, the year 2000 
Problem will have on the stocks in the Trust.
<TABLE>
ESSENTIAL INFORMATION REGARDING THE TRUST
<CAPTION>
As of December 31, 1998
Sponsor:   PaineWebber Incorporated
Trustee:   Investors Bank & Trust Co.
Initial Date of Deposit: January 8, 1998
<S>                                                                  <C>
Aggregate Market Value of Securities in Trust:                        $67,144,041
Number of Units:                                                       7,754,832
Fractional Undivided Interest in the Trust Represented by
Each Unit:                                                             1/7,754,832nd
Calculation of Public Offering Price Per Unit*:
Aggregate Value of Net Assets in Trust                                 $67,152,001
Divided by 7,754,832 Units                                             $8.6594
Plus Sales Charge of 3.75% of Public Offering Price                    $.3374 
Public Offering Price per Unit                                         $8.9968
Redemption Value per Unit:                                             $8.6594
Excess of Public Offering Price over Redemption Value per Unit:        $.3374 
Sponsor's Repurchase Price Per Unit:                                   $8.6594
Excess of Public Offering over Sponsor's Repurchase Price per Unit:    $.3374 
Evaluation Time:                                                       4 P.M. New York Time
Income Account Distribution Dates* *:                                  January 20, April 20, July 20, 
                                                                       October 20
Capital Account Distribution Dates* *:                                 January 20, 1999 and annually
                                                                       thereafter.
Record Dates:                                                          March 31, June 30, September 30,
                                                                       December 31
Mandatory Termination Date:                                            January 30, 2003
Discretionary Liquidation Amount:                                      50% of the value of the Securities
                                                                       upon completion of the deposit of
                                                                       the Securities.
Estimated Annual Expenses of the Trust* * *                            $.0254 per Unit
    *  The Public Offering Price will be based 
upon the value of the Stocks next computed 
following 
   receipt of the purchase order plus the 
applicable sales charges. (See "Valuation").
   * * See "Distributions"
* * * See "Expenses of Trust". Estimated 
dividends from the Stocks, based upon last 
dividends actually 
   paid, are expected by the Sponsor to be 
sufficient to pay estimated expenses of the 
Trust.
</TABLE>
<TABLE>
            REPORT OF INDEPENDENT AUDITORS
<C>                                    <S>
THE UNITHOLDERS, SPONSOR AND TRUSTEE
THE PAINEWEBBER EQUITY TRUST, GROWTH STOCK SERIES 
TWENTY ONE:
 We have audited the accompanying statement of 
financial condition of The PaineWebber Equity 
Trust, Growth Stock Series Twenty One, including 
the schedule of investments, as of December 31, 
1998 and the related statements of operations and 
changes in net assets for the period from January 
8, 1998 (initial date of deposit) to December 31, 
1998. These financial statements are the 
responsibility of the Trustee. Our responsibility 
is to express an opinion on these financial 
statements based on our audit. 

 We conducted our audit in accordance with 
generally accepted auditing standards. Those 
standards require that we plan and perform the 
audit to obtain reasonable assurance about 
whether the financial statements are free of 
material misstatement. An audit includes 
examining, on a test basis, evidence supporting 
the amounts and disclosures in the financial 
statements. Our procedures included confirmation 
of the securities owned as of December 31, 1998, 
as shown in the statement of financial condition 
and schedule of investments, by correspondence 
with the Trustee. An audit also includes 
assessing the accounting principles used and 
significant estimates made by the Trustee, as 
well as evaluating the overall financial 
statement presentation. We believe that our audit 
provides a reasonable basis for our opinion. 

 In our opinion, the financial statements 
referred to above present fairly, in all material 
respects, the financial position of The 
PaineWebber Equity Trust, Growth Stock Series 
Twenty One at December 31, 1998 and the results 
of its operations and changes in its net assets 
for the period from January 8, 1998 to December 
31, 1998, in conformity with generally accepted 
accounting principles. 
                            ERNST & YOUNG LLP 
New York, New York 
April 15, 1999
</TABLE>
<TABLE>
            THE PAINEWEBBER EQUITY TRUST,
           GROWTH STOCK SERIES TWENTY ONE
           STATEMENT OF FINANCIAL CONDITION
                 December 31, 1998
<CAPTION>
                  ASSETS
<S>                                                <C>                       <C>
Common Stock - at market value (Cost $64,956,059)              
(note 1 to schedule of investments)                 $67,144,041
Dividends receivable                                43,597     
Accounts Receivable - Securities Sold               583,130    
Prepaid organizational expenses                     80,396     
Cash                                                31,342     
Total Assets                                        $67,882,506
             LIABILITIES AND NET ASSETS
Accounts Payable - Units Redeemed                                            $585,682   
Distribution payable (note E)                                                116,668    
Accrued expenses payable                                                     28,155     
Total Liabilities                                                            $730,505   
Net assets (7,754,832 units of fractional undivided interest outstanding):              
Cost of 7,754,832 units (note B)                                             $67,486,815
Less sales charge (note C)                                                   (2,530,756)
Net amount applicable to investors                                           64,956,059 
Net unrealized market appreciation (note D)                                  2,187,982  
Net amount applicable to unitholders                                         67,144,041 
Undistributed investment income-net                                          8,238      
Overdistributed proceeds from securities sold                                (278)      
Net assets                                                                   67,152,001 
Total liabilities and net assets                                             $67,882,506
Net asset value per Unit                                                     $8.6594    
  See accompanying notes to financial statements.
</TABLE>
<TABLE>
            THE PAINEWEBBER EQUITY TRUST,
           GROWTH STOCK SERIES TWENTY ONE
              STATEMENT OF OPERATIONS
<CAPTION>
                                                              For the Period    
                                                              from January 8,   
                                                              1998 (initial date
                                                              of deposit) to    
                                                              December 31,      
                                                              1998              
<S>                                                           <C>
Operations:                                                                     
Dividend Income                                               $683,438          
Total investment income                                       683,438           
                                                                                
                                                                                
Less expenses:                                                                  
Trustee's fees, expenses and evaluator's expense              214,310           
Total expenses                                                214,310           
Investment Income-net                                         469,128           
                                                                                
                                                                                
Realized and unrealized gain (loss) on investments-net:                         
Net realized loss on securities transactions                  (379,173)         
Net change in unrealized market appreciation                  2,187,982         
Net realized and unrealized gain on investments               1,808,809         
Net increase in net assets resulting from operations          $2,277,937        
  See accompanying notes to financial statements.
</TABLE>
<TABLE>
            THE PAINEWEBBER EQUITY TRUST,
            GROWTH STOCK SERIES TWENTY ONE
           STATEMENT OF CHANGES IN NET ASSETS
<CAPTION>
                                                           For the Period    
                                                           from January 8,   
                                                           1998 (initial date
                                                           of deposit) to    
                                                           December 31,      
                                                           1998              
<S>                                                        <C>
Operations:                                                                  
Investment income-net                                      $469,128          
Net realized loss on securities transactions               (379,173)         
Net change in unrealized market appreciation               2,187,982         
Net increase in net assets resulting from operations       2,277,937         
Less: Distributions to Unitholders (Note E)                                  
Principal                                                  17,702,023        
Investment Income                                          503,344           
Total Distributions                                        18,205,367        
Less: Units Redeemed By Unitholders (Note F)                                 
Value of units redeemed at date of redemption              11,615,004        
Undistributed income at date of redemption                 16,115            
Total Redemptions                                          11,631,119        
Decrease in net assets                                     (27,558,549)      
Net Assets:                                                                  
Beginning of Period                                        ---               
Supplemental Deposits                                      94,710,550        
End Of Period                                              $67,152,001       
  See accompanying notes to financial statements.
</TABLE>
<TABLE>
            NOTES TO FINANCIAL STATEMENTS
               December 31, 1998
(A) The financial statements of the Trust are 
prepared on the accrual basis of accounting. 
Security transactions are accounted for on the 
date the securities are purchased or sold.
(B) Cost to investors represents the initial 
public offering price as of the initial date of 
deposit, and the value of units through 
supplemental deposits computed on the basis set 
forth under "Public Offering Price of Units".
(C) Sales charge in the Initial Public Offering 
period was 3.75% (3.90% of the net amount 
invested). See "Public Offering of Units - Sales 
Charge and Volume Discount", for information 
relating to the secondary market.
(D) At December 31, 1998, the gross unrealized 
market appreciation was $14,845,266 and the gross 
unrealized market depreciation was ($12,657,284). 
The net unrealized market appreciation was 
$2,187,982.
(E) Regular distributions of net income and 
principal receipts not used for redemption of 
units are made quarterly. Special distributions 
may be made as the Sponsor and Trustee deem 
necessary to comply with income tax regulations.
(F) The following units were redeemed with 
proceeds of securities sold as follows:
<CAPTION>
                                                                   For the Period
                                                                   from January 8,
                                                                   1998 (initial date
                                                                   of deposit) to
                                                                   December 31,
                                                                   1998              
<S>                                                                <C>
Total number of units redeemed                                     1,477,000         
Redemption amount                                                  $11,631,119       
The following units were sold through supplemental deposits:                         
Number of units sold                                               9,131,832         
Value of amount, net of sales charge                               $93,748,050       
</TABLE>
<TABLE>
             THE PAINEWEBBER EQUITY TRUST,
            GROWTH STOCK SERIES TWENTY ONE
               SCHEDULE OF INVESTMENTS
              As of December 31, 1998
<CAPTION>
COMMON STOCKS (100%)                                                              
Name of Issuer                              Number of Shares       Market Value(1)
<C>                                         <C>                    <C>
Appliances: (.27%)                                                                
Sunbeam Corporation                         26,089                 $182,623       
Applications Software: (4.25%)                                                    
Clarify, Inc.*                              80,573                 1,969,003      
PeopleSoft, Inc.*                           30,695                 581,287        
The Vantive Corporation*                    37,603                 300,824        
Auto/Truck Parts & Equipment: (5.05%)                                             
Arvin Industries, Inc.                      32,266                 1,345,089      
Excel Industries, Inc.                      57,559                 1,007,282      
The Standard Products Company               39,138                 797,437        
Walbro Corporation*                         37,696                 240,312        
Cellular Communication: (1.46%)                                                   
Nextel Communications, Inc.*                41,442                 979,067        
Computers: (2.25%)                                                                
Cabletron Systems, Inc.*                    70,600                 591,275        
Data General Corporation*                   56,021                 920,845        
Containers: (3.29%)                                                               
Bemis Company, Inc.                         24,559                 931,707        
Shorewood Packaging Corporation*            62,162                 1,274,321      
Data Processing/Management: (.47%)                                                
Baan Company, N.V.*                         29,923                 314,191        
Direct Marketing: (2.42%)                                                         
Catalina Marketing Corporation*             23,788                 1,626,504      
Drug Delivery Systems: (1.65%)                                                    
Alkermes, Inc.*                             49,897                 1,107,090      
Electric: (6.17%)                                                                 
IDACORP, Inc.                               29,160                 1,055,228      
Energy East Corporation                     31,461                 1,777,546      
NIPSCO Industries, Inc.                     42,972                 1,307,960      
Electronics: (3.59%)                                                              
Credence Systems Corporation*               39,907                 738,279        
Etec Systems, Inc.*                         24,555                 982,200        
Genus, Inc.*                                134,298                138,502        
LTX Corporation*                            216,410                554,551        
Finance: (7.95%)                                                                  
Fleet Financial Group, Inc.                 29,163                 1,303,222      
Golden State Bancorp, Inc.*                 30,695                 510,304        
Mellon Bank Corporation                     17,652                 1,213,575      
Southtrust Corporation                      26,474                 977,883        
State Street Corporation                    19,189                 1,334,835      
Food: (1.94%)                                                                     
Hannaford Brothers Company                  24,555                 1,301,415      
Gas Distribution: (3.25%)                                                         
Consolidated Natural Gas Company            18,424                 994,896        
MCN Energy Group Inc.                       28,394                 541,261        
Sonat, Inc.                                 23,788                 643,763        
Internet Software: (10.24%)                                                       
America Online, Inc.                        42,982                 6,877,131      
Machinery: (1.27%)                                                                
Harnischfeger Industries, Inc.              28,394                 289,264        
New Holland N.V.                            41,359                 566,101        
                                                                                  
                                                                   (Continued)    
</TABLE>
<TABLE>
             THE PAINEWEBBER EQUITY TRUST,
            GROWTH STOCK SERIES TWENTY ONE
               SCHEDULE OF INVESTMENTS
              As of December 31, 1998
<CAPTION>
COMMON STOCKS (100%)                                                              
Name of Issuer                              Number of Shares       Market Value(1)
<C>                                         <C>                    <C>
Medical: (14.25%)                                                                 
CardioThoracic Systems, Inc.*               87,484                 $606,920       
Eclipse Surgical Technologies, Inc.*        79,810                 583,611        
Genzyme Transgenics Corporation*            100,531                565,487        
Heartport, Inc.*                            44,511                 261,502        
Schering-Plough Corporation                 33,761                 1,865,295      
Sofamor Danek Group, Inc.*                  16,114                 1,961,880      
St. Jude Medical, Inc.*                     33,765                 934,868        
Texas Biotechnology Corporation*            179,577                886,661        
Warner-Lambert Company                      25,321                 1,903,823      
Networking Products: (9.10%)                                                      
Ascend Communications, Inc.*                58,650                 3,856,237      
FORE Systems, Inc.*                         62,159                 1,138,287      
Xylan Corporation*                          63,693                 1,118,608      
Oil: (2.95%)                                                                      
Nuevo Energy Company*                       28,394                 326,531        
Santa Fe Energy Resources, Inc.*            112,039                826,288        
Unocal Corporation                          28,394                 828,750        
Publishing: (3.13%)                                                               
Knight-Ridder, Inc.                         19,189                 981,038        
The Readers Digest Association, Inc.        44,511                 1,121,121      
Seismic Data Collection: (.61%)                                                   
Veritas DGC, Inc.*                          31,461                 408,993        
Soap & Cleaning Preparations: (4.38%)                                             
Church & Dwight Co., Inc.                   36,835                 1,323,758      
The Clorox Company                          13,816                 1,613,881      
Telecommunications: (10.06%)                                                      
Airtouch Communications, Inc.*              25,323                 1,826,421      
Century Telephone Enterprises, Inc.         31,006                 2,092,905      
GTE Corporation                             20,720                 1,346,800      
U.S. West Communications Group              23,019                 1,487,603      
TOTAL INVESTMENTS                                                  $67,144,041    
(1)  Valuation of Securities was made by the 
Trustee as described in "Valuation". 
 *    Non-income producing. 
</TABLE>

             PAINEWEBBER EQUITY TRUST
              GROWTH STOCK SERIES 21
               PROSPECTUS PART B 
PART B OF THIS PROSPECTUS MAY NOT BE 
DISTRIBUTED UNLESS ACCOMPANIED BY PART A.

Part B contains a description of the important 
features of the PaineWebber Equity Trust Growth 
Stock Series 21 and also includes a more detailed 
discussion of the investment risks that a 
Unitholder might face while holding Trust Units.

           THE COMPOSITION OF THE PORTFOLIO

 In constructing the Trust's portfolio on January 
8, 1998, PaineWebber believed that M&A (merger 
and acquisition) activity was strong and was 
likely to become even stronger-probably 
surpassing the late 1980s peak levels-because 
acquisitions offer a source of sales growth at a 
time when a muted business cycle and deflationary 
pressures make it very difficult to raise prices. 
PaineWebber identified two ways to invest in this 
trend: a) companies that are adept at growing via 
acquisition and b) companies that are likely to 
be acquired at a premium to their market price. 
M&A activity should accelerate because companies 
need to do deals to grow sales, and they have the 
ability to do them.

 And with PaineWebber's forecast that S&P 
(Standard & Poor's 500) earnings growth will slow 
in 1998 and a concomitant rise in the number of 
company-specific earnings disappointments, two 
other drivers of M&A activity-albeit somewhat 
spurious-would be:

acquisitions undertaken by firms anxious to 
deflect attention from their deteriorating 
financial results, and

mergers initiated by managers who realize that, 
if they cannot "fix" their firm's earnings 
problems, then selling out is the best route for 
them as shareholders and option holders.

                ABOUT THE TRUST

 The Trust is one of a series of similar but 
separate unit investment trusts created under New 
York law by the Sponsor pursuant to a Trust 
Indenture and Agreement* (the "Indenture") dated 
as of the Initial Date of Deposit, between 
PaineWebber Incorporated, as Sponsor and 
Investors Bank & Trust Company, as Trustee (the 
"Trustee"). The objective of the Trust is capital 
appreciation through an investment principally in 
equity stocks having, in Sponsor's opinion on the 
Initial Date of Deposit, potential for capital 
appreciation. Of course, there can be no 
assurance that the objective of the Trust will be 
achieved.

 On the Initial Date of Deposit, the Sponsor 
deposited with the Trustee confirmations of 
contracts for the purchase of Stocks together 
with an irrevocable letter or letters of credit 
of a commercial bank or banks in an amount at 
least equal to the purchase price. The value of 
the Securities was determined on the basis 
described under "Valuation". In exchange for the 
deposit of the contracts to purchase Securities, 
the Trustee delivered to the Sponsor a receipt 
for Units representing the entire ownership of 
the Trust.

 With the deposit on the Initial Date of Deposit, 
the Sponsor established a proportionate 
relationship between the Securities in the Trust 
(determined by reference to the number of shares 
of each issue of Stock). The Sponsor may, from 
time to time, cause the deposit of additional 
Securities in the Trust when additional Units are 
to be offered to the public or pursuant to the 
Reinvestment Plan, maintaining as closely as 
practicable the original percentage relationship 
between the Securities deposited on the Initial 
Date of Deposit and replicating any cash or cash 
equivalents held by the Trust (net of expenses). 
The original proportionate relationship is 
subject to adjustment to reflect the occurrence 
of a stock split or a similar event which affects 
the capital structure of the issuer of a Stock 
but which does not affect the Trust's percentage 
ownership of the common stock equity of such 
issuer at the time of such event, to reflect a 
sale or maturity of Security or to reflect a 
merger or reorganization. Stock dividends issued 
in lieu of cash dividends, if any,

*Reference is hereby made to said Trust Indenture 
and Agreement and any statements contained herein 
are qualified in their entirety by the provisions 
of said Trust Indenture and Agreement.
received by the Trust will be sold by the Trustee 
and the proceeds therefrom shall be added to the 
Income Account. (See "Administration of the 
Trust" and "Reinvestment Plan").

 On the Initial Date of Deposit each Unit 
represented the fractional undivided interest in 
the Securities and net income of the Trust set 
forth under "Essential Information Regarding the 
Trust". However, if additional Units are issued 
by the Trust (through the deposit of additional 
Securities for purposes of the sale of additional 
Units or pursuant to the Reinvestment Plan), the 
aggregate value of Securities in the Trust will 
be increased and the fractional undivided 
interest represented by each Unit in the balance 
will be decreased. If any Units are redeemed, the 
aggregate value of Securities in the Trust will 
be reduced, and the fractional undivided interest 
represented by each remaining Unit in the balance 
will be increased. Units will remain outstanding 
until redeemed upon tender to the Trustee by any 
Unitholder (which may include the Sponsor) or 
until the termination of the Trust. (See 
"Termination of the Trust".)

 The Stocks have been selected for their capital 
appreciation potential in light of the Sponsor's 
opinion, on the Initial Date of Deposit, that the 
issuers of such Stocks may be attractive 
acquisition candidates pursuant to mergers, 
acquisitions and tender offers. In general, 
tender offers involve a bid by an issuer or other 
acquiror to acquire a stock pursuant to the terms 
of its offer. Payment generally takes the form of 
cash, securities (typically bonds or notes), or 
cash and securities. Pursuant to federal law a 
tender offer must remain open for at least 20 
days and withdrawal rights apply during the 
entire offering period. Frequently offers are 
conditioned upon a specified number of shares 
being tendered and upon the obtaining of 
financing. There may be other conditions to the 
tender offer as well. Additionally, an offeror 
may only be willing to accept a specified number 
of shares. In the event a greater number of 
shares is tendered, the offeror must take up and 
pay for a pro rata portion of the shares 
deposited by each depositor during the period the 
offer remains open.

 Because the Stocks have been selected with a 
view to potential acquisition, the Indenture sets 
forth criteria to be applied in the event of a 
tender offer, merger or reorganization. The Trust 
is not managed and has been structured with 
certain automatic provisions contained in the 
Indenture. The foregoing may interfere with the 
Trust's ability to maximize its objectives and, 
consequently, a Unitholder's value. In such case, 
Unitholders shall have no rights against the 
Trust, the Sponsor, the Trustee or any other 
party associated with the Trust. The foregoing is 
not a disclaimer of responsibilities under 
Section 36 of the Investment Company Act of 1940.

 In the event a tender offer is made for a Stock, 
on the third business day prior to the expiration 
of the best tender offer then in effect, as 
determined by the Sponsor, the Sponsor will 
instruct the Trustee, and the Trustee will, 
tender the Stock; provided, however that the 
Trustee will sell the Stock on such date if it 
can realize at least 90% of the value of the 
price to be paid pursuant to the tender offer 
(such value to be determined by the Sponsor) 
except where the best tender offer is an offer 
for any and all outstanding Stock and is not 
conditioned upon the offeror's receipt of 
financing. In the event the Trustee has tendered 
and, in Sponsor's opinion, a better offer is made 
prior to the expiration of the prior offer, the 
Trustee will use its best efforts to exercise its 
withdrawal rights and follow the procedures set 
forth in the preceding sentence. Upon 
consummation of the tender offer, in the event 
any of the Stock tendered is not purchased (which 
could occur if such Stock is excluded due to pro 
rationing) the Trustee will sell the Stock as 
soon as practicable. Any securities received 
pursuant to a consummated tender offer will be 
sold by the Trustee as soon as practicable. If a 
tender offer fails, the Stock will be returned to 
the Trust. The Trustee, pursuant to the terms of 
the Indenture, will not tender or sell any Stock 
subject to a tender offer during any period in 
which the Trustee is purchasing Stock to create 
additional Units, except in those cases where, 
pursuant to the Reinvestment Plan, the Trustee 
creates additional Units on an Income Account 
Distribution Date. In such event, the Trustee 
shall not include such Stock subject to sale or 
tender on such date in the deposit of additional 
Securities but shall adjust the Percentage Ratios 
so that the Trust's percentage ownership shall be 
allocated on a pro-rata basis to the remaining 
Securities held in the Trust Fund.

 In the event an issuer of a Stock announces a 
proposed merger into another company and certain 
compensation is to be paid in exchange for the 
Stock, or in the event the issuer of a Stock 
announces a sale of substantially all of its 
assets, the Trustee will sell the Stock if it can 
realize 90% of the value to be received by 
shareholders upon completion of the merger or 
sale (such value to be determined by the 
Sponsor). If the Trust holds the Stock upon 
completion of the merger, any securities received 
as compensation will be sold by the Trustee as 
soon as practicable. In the event an issuer of 
Stock announces that another company will be 
merged into it, the Stock of such issuer will be 
retained unless the Sponsor directs the Trustee 
to sell the Stock for reasons set forth under the 
heading "Administration of the Trust-Portfolio 
Supervision." In the event of a corporate 
reorganization any securities received by the 
Trust will be sold as soon as practicable.

 In its investment banking, underwriting or 
merchant banking activities the Sponsor may 
acquire material non-public information about an 
issuer of Stocks in the Trust. Use of this 
information by the Sponsor in connection with the 
Trust may constitute a violation of the federal 
securities laws. Therefore, in order to avoid the 
possible use of this information there may be 
circumstances where the Sponsor is unable to give 
advice to the Trust, including advice on the 
value of a transaction or whether an offer is the 
best offer. In such case the Sponsor shall 
immediately advise the Trustee of its inability 
and, in such event, (a) with respect to a tender 
offer, the Trustee is required to sell the 
applicable Stock as close to the opening of the 
stock exchanges as is practicable on the last 
business day a tender offer is in effect and (b) 
with respect to a sale of substantially all of an 
issuer's assets or its merger into another 
issuer, the Trust will continue to hold the 
Stocks.

 In most circumstances the Trust has been 
structured to provide for the sale of Stock at 
90% of the value to be received upon completion 
of a tender, merger or acquisition in order to 
provide the Trust a price close to the price 
which could be received in the future if certain 
conditions to such completion are met. The 
percentage accommodates a discount reflecting the 
time value of money and the uncertainties of the 
tender, merger or acquisition taking place.

 There is no guarantee that there will be a 
tender offer for any of the Stocks, or merger or 
acquisition of any of the issuers whose stock is 
contained in the Trust. In addition, it is 
possible that legislation or regulations 
affecting merger and acquisition activity in the 
future may be passed and, if passed, the Sponsor 
cannot predict the impact upon the Trust. There 
is also no guarantee that the price received upon 
sale or pursuant to an acquisition will be the 
best price which could be received by the Trust 
at any time. For example, after stock is sold, 
the value may increase due to general market 
factors or due to subsequent tender offers. 
Additionally, the price of a Stock may decline 
for Stocks not taken up pursuant to a tender 
offer or in the event a merger or acquisition is 
not completed.

RISK FACTORS AND SPECIAL CONSIDERATIONS

 An investment in Units of the Trust should be 
made with an understanding of the risks inherent 
in an investment in common stocks in general. The 
general risks are associated with the rights to 
receive payments from the issuer which are 
generally inferior to creditors of, or holders of 
debt obligations or preferred stocks issued by, 
the issuer. Holders of common stocks have a right 
to receive dividends only when and if, and in the 
amounts, declared by the issuer's board of 
directors and to participate in amounts available 
for distribution by the issuer only after all 
other claims against the issuer have been paid or 
provided for. By contrast, holders of preferred 
stocks have the right to receive dividends at a 
fixed rate when and as declared by the issuer's 
board of directors, normally on a cumulative 
basis, but do not participate in other amounts 
available for distribution by the issuing 
corporation. Dividends on cumulative preferred 
stock must be paid before any dividends are paid 
on common stock. Preferred stocks are also 
entitled to rights on liquidation which are 
senior to those of common stocks. For these 
reasons, preferred stocks generally entail less 
risk than common stocks.

 Common stocks do not represent an obligation of 
the issuer. Therefore they do not offer any 
assurance of income or provide the degree of 
protection of debt securities. The issuance of 
debt securities or even preferred stock by an 
issuer will create prior claims for payment of 
principal, interest and dividends which could 
adversely affect the ability and inclination of 
the issuer to declare or pay dividends on its 
common stock or the rights of holders of common 
stock with respect to assets of the issuer upon 
liquidation or bankruptcy. Unlike debt securities 
which typically have a stated principal amount 
payable at maturity, common stocks do not have a 
fixed principal amount or a maturity. 
Additionally, the value of the Stocks in the 
Trust may be expected to fluctuate over the life 
of the Trust.

 In addition, there are investment risks common 
to all equity issues. The Stocks may appreciate 
or depreciate in value depending upon a variety 
of factors, including the full range of economic 
and market influences affecting corporate 
profitability, the financial condition of 
issuers, changes in national or worldwide 
economic conditions, and the prices of equity 
securities in general and the Stocks in 
particular. Distributions of income, generally 
made by declaration of dividends, is also 
dependent upon several factors, including those 
discussed above in the preceding sentence.

 Investors should note that the creation of 
additional Units subsequent to the Initial Date 
of Deposit may have an effect upon the value of 
previously existing Units. To create additional 
Units the Sponsor may deposit cash (or cash 
equivalents, e.g., a bank letter of credit in 
lieu of cash) with instructions to purchase 
Securities in amounts sufficient to maintain, to 
the extent practicable, the percentage 
relationship among the Securities based on the 
price of the Securities at the Evaluation Time on 
the date the cash is deposited. To the extent the 
price of a Security increases or decreases 
between the time cash is deposited with 
instructions to purchase the Security and the 
time the cash is used to purchase the Security, 
Units will represent less or more of that 
Security and more or less of the other Securities 
in the Trust. Unitholders will be at risk because 
of price fluctuations during this period since if 
the price of shares of a Security increases, 
Unitholders will have an interest in fewer shares 
of that Security, and if the price of a Security 
decreases, Unitholders will have an interest in 
more shares of that Security, than if the 
Security had been purchased on the date cash was 
deposited with instructions to purchase the 
Security. In order to minimize these effects, the 
Trust will attempt to purchase Securities as 
closely as possible to the Evaluation Time or at 
prices as closely as possible to the prices used 
to evaluate the Trust at the Evaluation Time. 
Thus price fluctuations during this period will 
affect the value of every Unitholder's Units and 
the income per Unit received by the Trust. In 
addition, costs incurred in connection with the 
acquisition of Securities will be at the expense 
of the Trust and will affect the value of every 
Unitholder's Units.

 In the event a contract to purchase a Stock to 
be deposited on the Initial Date of Deposit or 
any other date fails, cash held or available 
under a letter or letters of credit, attributable 
to such failed contract may be reinvested in 
another stock or stocks having characteristics 
sufficiently similar to the Stocks originally 
deposited (in which case the original 
proportionate relationship shall be adjusted) or, 
if not so reinvested, distributed to Unitholders 
of record on the last day of the month in which 
the failure occurred. The distribution will be 
made twenty days following such record date and, 
in the event of such a distribution, the Sponsor 
will refund to each Unitholder the portion of the 
sales charge attributable to such failed 
contract.

 Because the Trust is organized as a unit 
investment trust, rather than as a management 
investment company, the Trustee and the Sponsor 
do not have authority to manage the Trust's 
assets fully in an attempt to take advantage of 
various market conditions to improve the Trust's 
net asset value, but may dispose of Securities 
only under limited circumstances. (See the 
discussion above under the caption "The Trust" 
relating to disposition of Stocks which may be 
the subject of a tender offer, merger or 
reorganization and also the discussion under the 
caption "Administration of the Trust-Portfolio 
Supervision".)

              FEDERAL INCOME TAXES

 The Trust intends to qualify for and elect tax 
treatment as a "regulated investment company" 
under the Internal Revenue Code of 1986, as 
amended (the "Code"). By qualifying for and 
electing such treatment, subject to certain 
conditions and requirements, the Trust will not 
be subject to federal income tax to the extent 
its income is distributed to Unitholders in a 
timely manner. Any undistributed income may be 
subject to tax, including a four percent (4%) 
excise tax imposed by Section 4982 of the Code on 
certain undistributed income of a regulated 
investment company that does not distribute to 
shareholders in a timely manner at least 
ninety-eight percent (98%) of its taxable income 
(including capital gains). The Trust intends to 
distribute all of its income, including capital 
gains, annually.

 The gross income of the Trust typically will 
include dividends, interest and gains on sales or 
other dispositions of Securities. In order to 
qualify as a "regulated investment company", the 
Trust must, among other things (1) in the course 
of a taxable year derive at least 90% of its 
gross income from dividends, interest, gains on 
sales or other dispositions of Securities and 
certain other sources (referred to herein as 
"eligible sources"), (2) meet certain 
diversification tests, and (3) distribute in each 
year at least 90% of its investment company 
taxable income. If during a taxable year it 
appears that less than 90% of the Trust income 
will be derived from eligible sources, the 
Sponsor may direct the Trustee to sell Securities 
which, upon the realization of sufficient 
aggregate gain, will enable the Trust to maintain 
its qualification as a regulated investment 
company.

 In any taxable year, the distributions of any 
ordinary income (such as dividends) and the 
excess of net short-term capital gains over net 
long-term capital losses will be taxable as 
ordinary income to Unitholders. A distribution 
paid shortly after a purchase of shares may be 
taxable even though, in effect, it may represent 
a return of capital to Unitholders. A dividend 
paid by the Trust in January will be considered 
for federal income tax purposes to have been paid 
by the Trust and received by the Unitholders on 
the preceding December 31, if the dividend was 
declared in the preceding October, November or 
December to Unitholders of record in any one of 
those months. Distributions which are taxable as 
ordinary income to Unitholders will not 
constitute dividends for purposes of the 
dividends-received deduction for corporations 
except for, and only to the extent of, a specific 
designation by the Trust.

 Distributions by the Trust that are designated 
by it as "net capital gain" will be taxable to 
Unitholders as long-term capital gain, regardless 
of the length of time the Units have been held by 
a Unitholder. Distributions will not be taxable 
to Unitholders to the extent that they represent 
a return of capital; such distributions will, 
however, reduce a Unitholder's basis in his 
Units, and to the extent they exceed the basis of 
his Units will be treated as a gain from the sale 
of his Units. Any loss realized by a Unitholder 
on the sale or exchange of Units that are held by 
him for not more than six months will be treated 
as a long-term capital loss to the extent of any 
long-term capital gain distributions paid to such 
Unitholder with respect to such Units.

 Under the Taxpayer Relief Act of 1997, capital 
gains realized on the sale of property held for 
more than one year but not more than eighteen 
months are considered "mid-term gains." In the 
case of individuals, mid-term gains are taxed at 
lower rates than ordinary income, but not as 
favorably as capital gains on property held for 
more than eighteen months. The Trustee will 
identify in the annual tax information statement 
mailed to Unitholders the portion of capital gain 
dividends which are considered mid-term gains.

 Unitholders will be taxed in the manner 
described above regardless of whether 
distributions from the Trust are actually 
received by the Unitholder or are reinvested 
pursuant to the Reinvestment Plan.

 Withholding For Citizen or Resident 
Investors. In the case of any noncorporate 
Unitholder that is a citizen or resident of the 
United States, a 31 percent "backup" withholding 
tax will apply to certain distributions of the 
Trust unless the Unitholder properly completes 
and files under penalties of perjury, IRS Form 
W-9 (or its equivalent).

 The foregoing discussion of taxation is a 
general summary and relates only to certain 
aspects of the federal income tax consequences of 
an investment in the Trust for Unitholders that 
hold their Units as capital assets. Unitholders 
may also be subject to state and local taxation. 
Each Unitholder should consult its own tax 
advisor regarding the Federal, state and local 
tax consequences to it of ownership of Units.

 Investment in the Trust may be suited for 
purchase by funds and accounts of individual 
investors that are exempt from federal income 
taxes such as Individual Retirement Accounts, 
tax-qualified retirement plans including Keogh 
Plans, and other tax-deferred retirement plans. 
Unitholders desiring to purchase Units for 
tax-deferred plans and IRA's should consult their 
PaineWebber Investment Executive for details on 
establishing such accounts. Units may also be 
purchased by persons who already have 
self-directed accounts established under 
tax-deferred retirement plans.

             PUBLIC OFFERING OF UNITS

 Public Offering Price. The public offering price 
per Unit is based on the aggregate market value 
of the Securities, next determined after the 
receipt of a purchase order, divided by the 
number of Units outstanding plus the sales charge 
set forth below. The public offering price per 
Unit is computed by dividing the Trust Fund 
Evaluation, next determined after receipt of a 
purchase order by the number of Units outstanding 
plus the sales charge. (See "Valuation".) The 
Public Offering Price on the Initial Date of 
Deposit or on any subsequent date will vary from 
the Public Offering Price calculated on the 
business day prior to the Initial Date of Deposit 
due to fluctuations in the value of the Stocks 
among other factors.

 Sales Charge and Volume Discount. The Public 
Offering Price of Units of the Trust includes a 
sales charge which varies based upon the number 
of Units purchased by a single purchaser. (See 
the sales charge schedule set forth below.) 
During the initial public offering period, the 
sales charge will be based on the number of Trust 
Units purchased on the same or any preceding day 
by a single purchaser. Such purchaser or his 
dealer must notify the Sponsor at the time of 
purchase of any previous purchase of Trust Units 
in order to aggregate all such purchases and must 
supply the Sponsor with sufficient information to 
permit confirmation of such purchaser's 
eligibility; acceptance of such purchase order is 
subject to confirmation. Purchases of Units of 
other trusts may not be aggregated with purchases 
of Trust Units to qualify for this procedure. 
This procedure may be amended or terminated at 
any time without notice. In the event of such 
termination, the procedure will revert to that 
stated under the sales charge schedule referred 
to below.

 Sales charges during the initial public offering 
period and for secondary market sales are set 
forth below. A discount in the sales charge is 
available to volume purchasers of Units due to 
economies of scale in sales effort and sales 
related expenses relating to volume purchases. 
The sales charge applicable to volume purchasers 
of Units is reduced on a graduated scale for 
sales to any person of at least $50,000 or 5,000 
Units, applied on whichever basis is more 
favorable to the purchaser.

Initial Public Offering Period and Secondary Market
Thereafter
                     Percent of       Percent of
Aggregate Dollar     Public Offering  Net Amount
Value of Units       Price            Invested  
Less than $50,000....3.75%            3.90%
$50,000 to $9,999....3.50             3.63      
$100,000 to $99,999..3.25             3.36      
$200,000 to $99,999..2.75             2.83      
$400,000 to $99,999..2.50             2.56      
$500,000 to $99,999..2.00             2.04      
$1,000,000 or more...1.75             1.78      
_____________
* The sales charge applicable to volume 
purchasers according to the table above will be 
applied on either a dollar or Unit basis, 
depending upon which basis provides a more 
favorable purchase price to the purchaser.

 The volume discount sales charge shown above 
will apply to all purchases of Units on any one 
day by the same person in the amounts stated 
herein, and for this purpose purchases of Units 
of this Trust will be aggregated with concurrent 
purchases of any other trust which may be offered 
by the Sponsor. Units held in the name of the 
purchaser's spouse or in the name of a 
purchaser's child under the age of 21 are deemed 
for the purposes hereof to be registered in the 
name of the purchaser. The reduced sales charges 
are also applicable to a trustee or other 
fiduciary purchasing Units for a single trust 
estate or single fiduciary account.

 No sales charge will be imposed on Units of the 
Trust acquired by Unitholders in connection with 
participation in the Reinvestment Plan (see 
"Reinvestment Plan").

 Employee Discount. Due to the realization of 
economies of scale in sales effort and sales 
related expenses with respect to the purchase of 
Units by employees of the Sponsor and its 
affiliates, the Sponsor does not intend to impose 
a sales charge on such employee sales.

 Exchange Option. Unitholders may elect to 
exchange any or all of their Units of this series 
for units of one or more of any series of 
PaineWebber Municipal Bond Fund Series (the 
"PaineWebber Series"); The Municipal Bond Trust, 
(the "National Series"); The Municipal Bond 
Trust, Multi-State Program (the "Multi-State 
Series); The Municipal Bond Trust, California 
Series (the "California Series"); The Municipal 
Bond Trust, Insured Series (the "Insured 
Series"); The Corporate Bond Trust, (the 
"Corporate Series"); The PaineWebber Pathfinders 
Trust, (the "Pathfinders Series"), The 
PaineWebber Federal Government Trust, (the 
"Government Series") or the PaineWebber Equity 
Trust, (the "Equity Series") (collectively 
referred to as the "Exchange Trusts"), at a 
Public Offering Price for the units of the 
Exchange Trusts to be acquired based on a reduced 
sales charge of $15 per unit. Unitholders of this 
Trust are not eligible for the Exchange Option 
into (1) any Exchange Trust designated as a 
rollover series for the 30 day period prior to 
termination of such Trust or (2) any Exchange 
Trust subject to a deferred sales charge. The 
purpose of such reduced sales charge is to permit 
the Sponsor to pass on to the Unitholder who 
wishes to exchange Units the cost savings 
resulting from such exchange of Units. The cost 
savings result from reductions in time and 
expense related to advice, financial planning and 
operational expense required for the Exchange 
Option. Each Exchange Trust has different 
investment objectives, therefore a Unitholder 
should read the prospectus for the applicable 
Exchange Trust carefully prior to exercising this 
option. Exchange Trusts having as their objective 
the receipt of tax-exempt interest income would 
not be suitable for tax-deferred investment plans 
such as Individual Retirement Accounts. A 
Unitholder who purchased Units of a series and 
paid a per unit sales charge that was less than 
the per Unit sales charge of the series of 
Exchange Trusts for which such Unitholder desires 
to exchange into, will be allowed to exercise the 
Exchange Option at the Unit Offering Price plus 
the reduced sales charge, provided the Unitholder 
has held the Units for at least five months. Any 
such Unitholder who has not held the Units to be 
exchanged for the five-month period will be 
required to exchange them at the Unit Offering 
Price plus a sales charge based on the greater of 
the reduced sales charge, or an amount which, 
together with the initial sales charge paid in 
connection with the acquisition of the Units 
being exchanged, equals the sales charge of the 
series of the Exchange Trust for which such 
Unitholder desires to exchange into, determined 
as of the date of the exchange.

 The Sponsor will permit exchanges at the reduced 
sales charge provided there is either a primary 
market for Units or a secondary market maintained 
by the Sponsor in both the Units of this series 
and units of the applicable Exchange Trust and 
there are units of the applicable Exchange Trust 
available for sale. While the Sponsor has 
indicated that it intends to maintain a market 
for the Units of the respective Trusts, there is 
no obligation on its part to maintain such a 
market. Therefore, there is no assurance that a 
market for Units will in fact exist on any given 
date at which a Unitholder wishes to sell his 
Units of this series and thus there is no 
assurance that the Exchange Option will be 
available to a Unitholder. Exchanges will be 
effected in whole Units only. Any excess proceeds 
from Unitholders' Units being surrendered will be 
returned. Unitholders will be permitted to 
advance new money in order to complete an 
exchange to round up to the next highest number 
of Units. An exchange of Units pursuant to the 
Exchange Option generally will constitute a 
"taxable event" under the Code, i.e., a 
Unitholder will recognize a tax gain or loss at 
the time of exchange. Unitholders are urged to 
consult their own tax advisors as to the tax 
consequences to them of exchanging Units in 
particular cases.

 The Sponsor reserves the right to modify, 
suspend or terminate this Exchange Option at any 
time with notice to Unitholders. In the event the 
Exchange Option is not available to a Unitholder 
at the time he wishes to exercise it, the 
Unitholder will be immediately notified and no 
action will be taken with respect to his Units 
without further instruction from the Unitholder.

 To exercise the Exchange Option, a Unitholder 
should notify the Sponsor of his desire to 
exercise the Exchange Option and to use the 
proceeds from the sale of his Units to the 
Sponsor of this series to purchase Units of one 
or more of the Exchange Trusts from the Sponsor. 
If Units of the applicable outstanding series of 
the Exchange Trust are at that time available for 
sale, and if such Units may lawfully be sold in 
the state in which the Unitholder is resident, 
the Unitholder may select the series or group of 
series for which he desires his investment to be 
exchanged. The Unitholder will be provided with a 
current prospectus or prospectuses relating to 
each series in which he indicates interest.

 The exchange transaction will operate in a 
manner essentially identical to any secondary 
market transaction, i.e., Units will be 
repurchased at a price based on the market value 
of the Securities in the portfolio of the Trust 
next determined after receipt by the Sponsor of 
an exchange request and properly endorsed 
documents. Units of the Exchange Trust will be 
sold to the Unitholder at a price based upon the 
next determined market value of the Securities in 
the Exchange Trust plus the reduced sales charge. 
Exchange transactions will be effected only in 
whole units; thus, any proceeds not used to 
acquire whole units will be paid to the selling 
Unitholder.

 For example, assume that a Unitholder, who has 
three thousand units of a trust with a current 
price of $1.30 per unit, desires to sell his 
units and seeks to exchange the proceeds for 
units of a series of an Exchange Trust with a 
current price of $890 per Unit based on the bid 
prices of the underlying securities. In this 
example, which does not contemplate any rounding 
up to the next highest number of Units, the 
proceeds from the Unitholder's Units would 
aggregate $3,900. Since only whole units of an 
Exchange Trust may be purchased under the 
Exchange Option, the Unitholder would be able to 
acquire four Units in the Exchange Trust for a 
total cost of $3,620 ($3,560 for the Units and 
$60 for the sales charge). If all 3,000 Units 
were tendered, the remaining $280 would be 
returned to the Unitholder.

 Conversion Option. Owners of units of any 
registered unit investment trust sponsored by 
others which was initially offered at a maximum 
applicable sales charge of at least 3.0% (a 
"Conversion Trust") may elect to apply the cash 
proceeds of the sale or redemption of those units 
directly to acquire available units of any 
Exchange Trust at a reduced sales charge of $15 
per Unit, per 100 Units in the case of Exchange 
Trusts having a Unit price of approximately $10, 
or per 1,000 Units in the case of Exchange Trusts 
having a Unit price of approximately $1, subject 
to the terms and conditions applicable to the 
Exchange Option (except that no secondary market 
is required for Conversion Trust units). To 
exercise this option, the owner should notify his 
retail broker. He will be given a prospectus for 
each series in which he indicates interest and 
for which units are available. The dealer must 
sell or redeem the units of the Conversion Trust. 
Any dealer other than PaineWebber must certify 
that the purchase of the units of the Exchange 
Trust is being made pursuant to and is eligible 
for the Conversion Option. The dealer will be 
entitled to two thirds of the applicable reduced 
sales charge. The Sponsor reserves the right to 
modify, suspend or terminate the Conversion 
Option at any time with notice, including the 
right to increase the reduced sales charge 
applicable to this option (but not in excess of 
$5 more per Unit, per 100 Units or per 1,000 
Units, as applicable than the corresponding fee 
then being charged for the Exchange Option). For 
a description of the tax consequences of a 
conversion reference is made to the Exchange 
Option section herein.

 Distribution of Units. The minimum purchase in 
the initial public offering is $250. Only whole 
Units may be purchased.

 The Sponsor is the sole underwriter of the 
Units. Sales may, however, be made to dealers who 
are members of the National Association of 
Securities Dealers, Inc. ("NASD") at prices which 
include a concession of $.30 per Unit at the 
highest sales charge, subject to change from time 
to time. The difference between the sales charge 
and the dealer concession will be retained by the 
Sponsor. In the event that the dealer concession 
is 90% or more of the sales charge per Unit, 
dealers taking advantage of such concession may 
be deemed to be underwriters under the Securities 
Act of 1933.

 The Sponsor reserves the right to reject, in 
whole or in part, any order for the purchase of 
Units. The Sponsor intends to qualify the Units 
in all states of the United States, the District 
of Columbia and the Commonwealth of Puerto Rico.

 Secondary Market for Units. While not obligated 
to do so, the Sponsor intends to maintain a 
secondary market for the Units and continuously 
offer to purchase Units at the Trust Fund 
Evaluation per Unit next computed after receipt 
by the Sponsor of an order from a Unitholder. The 
Sponsor may cease to maintain such a market at 
any time, and from time to time, without notice. 
In the event that a secondary market for the 
Units is not maintained by the Sponsor, a 
Unitholder desiring to dispose of Units may 
tender such Units to the Trustee for redemption 
at the price calculated in the manner set forth 
under "Redemption". Redemption requests in excess 
of $100,000 may be redeemed "in kind" as 
described under "Redemption." The Sponsor does 
not in any way guarantee the enforceability, 
marketability, value or price of any of the 
stocks in the Trust, nor that of the Units.

 The Trust Fund Evaluation per Unit at the time 
of sale or tender for redemption may be less than 
the price at which the Unit was purchased.

 The Sponsor may redeem any Units it has 
purchased in the secondary market if it 
determines for any reason that it is undesirable 
to continue to hold these Units in its inventory. 
Factors which the Sponsor may consider in making 
this determination will include the number of 
units of all series of all trusts which it holds 
in its inventory, the saleability of the Units 
and its estimate of the time required to sell the 
Units and general market conditions.

 A Unitholder who wishes to dispose of his Units 
should inquire of his bank or broker as to 
current market prices in order to determine if 
over-the-counter prices exist in excess of the 
redemption price and the repurchase price (see 
"Redemption").

 Sponsor's Profits. In addition to the applicable 
sales charge, the Sponsor realizes a profit (or 
sustains a loss) in the amount of any difference 
between the cost of the Stocks to the Sponsor and 
the price at which it deposits the Stocks in the 
Trust in exchange for Units, which is the value 
of the Stocks, determined by the Trustee as 
described under "Valuation". The cost of Stock to 
the Sponsor includes the amount paid by the 
Sponsor for brokerage commissions. These amounts 
are an expense of the Trust.

 Cash, if any, received from Unitholders prior to 
the settlement date for the purchase of Units or 
prior to the payment for Securities upon their 
delivery may be used in the Sponsor's business 
subject to the limitations of Rule 15c3-3 under 
the Securities and Exchange Act of 1934 and may 
be of benefit to the Sponsor.

 In selling any Units in the initial public 
offering after the Initial Date of Deposit, the 
Sponsor may realize profits or sustain losses 
resulting from fluctuations in the net asset 
value of outstanding Units during the period. In 
maintaining a secondary market for the Units, the 
Sponsor may realize profits or sustain losses in 
the amount of any differences between the price 
at which it buys Units and the price at which it 
resells or redeems such Units.

                 REDEMPTION

 Units may be tendered to Investors Bank & Trust 
Company for redemption at its office in person, 
or by mail at Hancock Towers, 200 Clarendon 
Street, Boston, MA 02116 upon payment of any 
transfer or similar tax which must be paid to 
effect the redemption. At the present time there 
are no such taxes. No redemption fee will be 
charged by the Sponsor or Trustee. If the Units 
are represented by a certificate it must be 
properly endorsed accompanied by a letter 
requesting redemption. If held in uncertificated 
form, a written instrument of redemption must be 
signed by the Unitholder. Unitholders must sign 
exactly as their names appear on the records of 
the Trustee with signatures guaranteed by an 
eligible guarantor institution or in such other 
manner as may be acceptable to the Trustee. In 
certain instances the Trustee may require 
additional documents such as, but not limited to, 
trust instruments, certificates of death, 
appointments as executor or administrator, or 
certificates of corporate authority. Unitholders 
should contact the Trustee to determine whether 
additional documents are necessary. Units 
tendered to the Trustee for redemption will be 
cancelled, if not repurchased by the Sponsor.

 Units will be redeemed at the Redemption Value 
per Unit next determined after receipt of the 
redemption request in good order by the Trustee. 
The Redemption Value per Unit is determined by 
dividing the Trust Fund Evaluation by the number 
of Units outstanding. (See "Valuation".)

 A redemption request is deemed received on the 
business day (see "Valuation" for a definition of 
business day) when such request is received prior 
to 4:00 p.m. If it is received after 4:00 p.m., 
it is deemed received on the next business day. 
During the period in which the Sponsor maintains 
a secondary market for Units, the Sponsor may 
repurchase any Unit presented for tender to the 
Trustee for redemption no later than the close of 
business on the second business day following 
such presentation and Unitholders will receive 
the Redemption Value next determined after 
receipt by the Trustee of the redemption request. 
Proceeds of a redemption will be paid to the 
Unitholder no later than the seventh calendar day 
following the date of tender (or if the seventh 
calendar day is not a business day on the first 
business day prior thereto).

 With respect to cash redemptions, amounts 
representing income received shall be withdrawn 
from the Income Account, and, to the extent such 
balance is insufficient and for remaining 
amounts, from the Capital Account. The Trustee is 
empowered, to the extent necessary, to sell 
Securities to meet redemptions. The Trustee will 
sell Securities in such manner as is directed by 
the Sponsor. In the event no such direction is 
given, Stocks will be sold pro rata, to the 
extent possible, and if not possible Stocks 
having the greatest amount of capital 
appreciation will be sold first. (See 
"Administration of the Trust".) However, with 
respect to redemption requests in excess of 
$100,000, the Sponsor may determine in its 
discretion to direct the Trustee to redeem Units 
"in kind" by distributing Stocks to the redeeming 
Unitholder. When Stocks are so distributed, a 
proportionate amount of each Stock will be 
distributed, rounded to avoid the distribution of 
fractional shares and using cash or checks where 
rounding is not possible. The Sponsor may direct 
the Trustee to redeem Units "in kind" even if it 
is then maintaining a secondary market in Units 
of the Trust. Securities will be valued for this 
purpose as set forth under "Valuation". A 
Unitholder receiving a redemption "in kind" may 
incur brokerage or other transaction costs in 
converting the Stocks distributed into cash. The 
availability of redemption "in kind" is subject 
to compliance with all applicable laws and 
regulations, including the Securities Act of 
1933, as amended.

 To the extent that Securities are redeemed in 
kind or sold, the size and diversity of the Trust 
will be reduced. Sales will usually be required 
at a time when Securities would not otherwise be 
sold and may result in lower prices than might 
otherwise be realized. The price received upon 
redemption may be more or less than the amount 
paid by the Unitholder depending on the value of 
the Securities in the portfolio at the time of 
redemption. In addition, because of the minimum 
amounts in which Securities are required to be 
sold, the proceeds of sale may exceed the amount 
required at the time to redeem Units; these 
excess proceeds will be distributed to 
Unitholders on the Distribution Dates.

 The Trustee may, in its discretion, and will, 
when so directed by the Sponsor, suspend the 
right of redemption, or postpone the date of 
payment of the Redemption Value, for more than 
seven calendar days following the day of tender 
for any period during which the New York Stock 
Exchange, Inc. is closed other than for weekend 
and holiday closings; or for any period during 
which the Securities and Exchange Commission 
determined that trading on the New York Stock 
Exchange, Inc. is restricted or for any period 
during which an emergency exists as a result of 
which disposal or evaluation of the Securities is 
not reasonably practicable; or for such other 
period as the Securities and Exchange Commission 
may by order permit for the protection of 
Unitholders. The Trustee is not liable to any 
person or in any way for any loss or damages 
which may result from any such suspension or 
postponement, or any failure to suspend or 
postpone when done in the Trustee's discretion.

                 VALUATION

 The Trustee will calculate the Trust's value 
(the "Trust Fund Evaluation") per Unit at the 
Evaluation Time set forth under "Summary of 
Essential Information Regarding the Trust" (1) on 
each business day as long as the Sponsor is 
maintaining a bid in the secondary market, (2) on 
the business day on which any Unit is tendered 
for redemption, (3) on any other day desired by 
the Sponsor or the Trustee and (4) upon 
termination, by adding (a) the aggregate value of 
the Securities and other assets determined by the 
Trustee as set forth below, (b) cash on hand in 
the Trust, including dividends receivable on 
Stock trading ex-dividend and income accrued held 
but not yet distributed (other than any cash held 
in any reserve account established under the 
Indenture or cash held for the purchase of 
Contract Securities) and (c) accounts receivable 
for Securities sold and any other assets of the 
Trust not included in (a) and (b) above, and 
deducting therefrom the sum of (v) taxes or other 
governmental charges against the Trust not 
previously deducted, (w) accrued fees and 
expenses of the Trustee and the Sponsor 
(including legal and auditing expenses) and other 
Trust expenses (x) cash allocated for 
distributions to Unitholders and (y) accounts 
payable for Units tendered for redemption and any 
other liabilities of the Trust Fund not included 
in (v), (w), (x) and (y) above. The per Unit 
Trust Fund Evaluation is calculated by dividing 
the result of such computation by the number of 
Units outstanding as of the date thereof. 
Business days do not include Saturdays, Sundays, 
New Year's Day, Martin Luther King, Jr's. Day, 
Presidents' Day, Good Friday, Memorial Day, 
Independence Day, Labor Day, Thanksgiving Day and 
Christmas Day and other days that the New York 
Stock Exchange is closed.

 The value of Stocks shall be determined by the 
Trustee in good faith in the following manner: 
(1) if the domestic Stocks are listed on one or 
more national securities exchanges or on the 
National Market System maintained by the National 
Association of Securities Dealers Automated 
Quotations System, such evaluation shall be based 
on the closing sale price on that day (unless the 
Trustee deems such price inappropriate as a basis 
for evaluation) on the exchange which is the 
principal market thereof (deemed to be the New 
York Stock Exchange in the case of the domestic 
Stocks if such Stocks are listed thereon), (2) if 
there is no such appropriate closing sales price 
on such exchange or system, at the mean between 
the closing bid and asked prices on such exchange 
or system (unless the Trustee deems such price 
inappropriate as a basis for evaluation), (3) if 
the Stocks are not so listed or, if so listed and 
the principal market therefor is other than on 
such exchange or there are no such appropriate 
closing bid and asked prices available, such 
evaluation shall be made by the Trustee in good 
faith based on the closing sale price in the 
over-the-counter market (unless the Trustee deems 
such price inappropriate as a basis for 
evaluation) or (4) if there is no such 
appropriate closing price, then (a) on the basis 
of current bid prices, (b) if bid prices are not 
available, on the basis of current bid prices for 
comparable securities, (c) by the Trustee's 
appraising the value of the Stock in good faith 
on the bid side of the market or (d) by any 
combination thereof. The tender of a Stock 
pursuant to a tender offer will not affect the 
method of valuing such Stock.

COMPARISON OF PUBLIC OFFERING PRICE AND REDEMPTION VALUE

 The Stocks are valued on the same basis for the 
initial and secondary markets and for purposes of 
redemptions. On the business day prior to the 
Date of Deposit, the Public Offering Price per 
Unit (which figure includes the sales charge) 
exceeded the Redemption Value. (See "Essential 
Information"). The prices of Stocks are expected 
to vary. For this reason and others, including 
the fact that the Public Offering Price includes 
the sales charge, the amount realized by a 
Unitholder upon redemption of Units may be less 
than the price paid by the Unitholder for such 
Units.

              EXPENSES OF THE TRUST

 The cost of the preparation and printing of the 
Indenture and this Prospectus, the initial fees 
of the Trustee and the Trustee's counsel, and 
expenses incurred in establishing the Trust, 
including legal and auditing fees (the 
"Organizational Expenses"), will be paid by the 
Trust, as is common for mutual funds. 
Historically, the Sponsors of Unit Trusts have 
paid all organizational expenses. The Sponsor 
will receive no fee from the Trust for its 
services in establishing the Trust.

 The Sponsor will receive a fee, which is earned 
for portfolio supervisory services, and which is 
based upon the largest number of Units 
outstanding during the calendar year. The 
Sponsor's fee, which is not to exceed $.0035 per 
Unit per calendar year, may exceed the actual 
costs of providing portfolio supervisory services 
for the Trust, but at no time will the total 
amount it receives for portfolio supervisory 
services rendered to all series of the 
PaineWebber Equity Trust in any calendar year 
exceed the aggregate cost to it of supplying such 
services in such year.

 For its services as Trustee and Evaluator, the 
Trustee will be paid in monthly installments, 
annually $.0170 per Unit, based on the largest 
number of Units outstanding during the previous 
month. In addition, the regular and recurring 
expenses of the Trust are estimated to be $.0049 
which include, but are not limited to 
Organizational Expenses of $.0026 per Unit, and 
certain mailing, printing, and audit expenses. 
Expenses in excess of this estimate will be borne 
by the Trust. The Trustee could also benefit to 
the extent that it may hold funds in non-interest 
bearing accounts created by the Indenture.

 The Sponsor's fee and Trustee's fee may be 
increased without approval of the Unitholders by 
an amount not exceeding a proportionate increase 
in the category entitled "All Services Less Rent" 
in the Consumer Price Index published by the 
United States Department of Labor or, if the 
Price Index is no longer published, a similar 
index as determined by the Trustee and Sponsor.

 In addition to the above, the following charges 
are or may be incurred by the Trust and paid from 
the Income Account, or, to the extent funds are 
not available in such Account, from the Capital 
Account (see "Administration of the 
Trust--Accounts"): (1) fees for the Trustee for 
extraordinary services; (2) expenses of the 
Trustee (including legal and auditing expenses) 
and of counsel; (3) various governmental charges; 
(4) expenses and costs of any action taken by the 
Trustee to protect the Trust and the rights and 
interests of the Unitholders; (5) indemnification 
of the Trustee for any loss, liabilities or 
expenses incurred by it in the administration of 
the Trust without gross negligence, bad faith or 
wilful misconduct on its part; (6) brokerage 
commissions and other expenses incurred in 
connection with the purchase and sale of 
Securities; and (7) expenses incurred upon 
termination of the Trust. In addition, to the 
extent then permitted by the Securities and 
Exchange Commission, the Trust may incur expenses 
of maintaining registration or qualification of 
the Trust or the Units under Federal or state 
securities laws so long as the Sponsor is 
maintaining a secondary market (including, but 
not limited to, legal, auditing and printing 
expenses).

 The accounts of the Trust shall be audited not 
less than annually by independent public 
accountants selected by the Sponsor. The expenses 
of the audit shall be an expense of the Trust. So 
long as the Sponsor maintains a secondary market, 
the Sponsor will bear any annual audit expense 
which exceeds $.0050 per Unit. Unitholders 
covered by the audit during the year may receive 
a copy of the audited financial statements upon 
request.

 The fees and expenses set forth above are 
payable out of the Trust and when unpaid will be 
secured by a lien on the Trust. Based upon the 
last dividend paid prior to the Initial Date of 
Deposit, dividends on the Stocks are expected to 
be sufficient to pay the entire amount of 
estimated expenses of the Trust. To the extent 
that dividends paid with respect to the Stocks 
and income received on the Treasury Obligations 
are not sufficient to meet the expenses of the 
Trust, the Trustee is authorized to sell 
Securities to meet the expenses of the Trust. 
Securities will be selected in the same manner as 
is set forth under "Redemption".

              RIGHTS OF UNITHOLDERS

 Ownership of Units is evidenced by recordation 
on the books of the Trustee. In order to avoid 
additional operating costs and for investor 
convenience, certificates will not be issued 
unless a request, in writing with signature 
guaranteed by an eligible guarantor institution 
or in such other manner as may be acceptable to 
the Trustee, is delivered by the Unitholder to 
the Sponsor. Issued Certificates are transferable 
by presentation and surrender to the Trustee at 
its office in Boston, Massachusetts properly 
endorsed or accompanied by a written instrument 
or instruments of transfer. Uncertificated Units 
are transferable by presentation to the Trustee 
at its office in Boston of a written instrument 
of transfer.

 Certificates may be issued in denominations of 
one Unit or any integral multiple thereof as 
deemed appropriate by the Trustee. A Unitholder 
may be required to pay $2.00 per certificate 
reissued or transferred, and shall be required to 
pay any governmental charge that may be imposed 
in connection with each such transfer or 
interchange. For new certificates issued to 
replace destroyed, mutilated, stolen or lost 
certificates, the Unitholder must furnish 
indemnity satisfactory to the Trustee and must 
pay such expenses as the Trustee may incur. 
Mutilated certificates must be surrendered to the 
Trustee for replacement.

                DISTRIBUTIONS

 The Trustee will distribute net dividends and 
interest, if any, from the Income Account on the 
quarterly Distribution Dates to Unitholders of 
record on the preceding Record Date. 
Distributions from the Capital Account will be 
made on annual Distribution Dates to Unitholders 
of record on the preceding Record Date. 
Distributions of less than $.05 per Unit need not 
be made from the Capital Account on any 
Distribution Date. See "Essential Information". 
Whenever required for regulatory or tax purposes, 
the Trustee will make special distributions of 
any dividends or capital on special Distribution 
Dates to Unitholders of record on special Record 
Dates declared by the Trustee.

 If and to the extent that the Sponsor, on behalf 
of the Trust, receives a favorable response to a 
no-action letter request which it intends to 
submit to the Division of Investment Management 
of the Securities and Exchange Commission (the 
"SEC") with respect to reinvesting cash proceeds 
received by the Trust, the Trustee may reinvest 
such cash proceeds in additional Securities held 
in the Trust Fund at such time. Such reinvestment 
shall be made so that each deposit of additional 
Securities shall be made so as to match as 
closely as practicable the percentage 
relationships of shares of Stocks and such 
reinvestment shall be made in accordance with the 
parameters set forth in the no-action letter 
response. If the Sponsor and the Trustee 
determine that it shall be necessary to amend the 
Indenture to comply with the parameters set forth 
in the no-action letter response, such documents 
may be amended without the consent of 
Unitholders. There can be no assurance that the 
Sponsor will receive a favorable no-action letter 
response.

 Unitholders may elect to have their Income 
Account distributions automatically reinvested 
into additional Units of the Trust at no sales 
charge. (See "Reinvestment Plan").

 Upon termination of the Trust, each Unitholder 
of record on such date will receive his pro rata 
share of the amounts realized upon disposition of 
the Securities plus any other assets of the 
Trust, less expenses of the Trust. (See 
"Termination of the Trust".)

               REINVESTMENT PLAN

 Income Account distributions on Units may be 
reinvested by participating in the Trust's 
Reinvestment Plan (the "Reinvestment Plan"). To 
participate in the Reinvestment Plan, a 
Unitholder must contact his broker, dealer or 
financial institution to determine whether he may 
participate in the Reinvestment Plan. Under the 
Reinvestment Plan, the Units acquired for current 
Unitholders will be either Units already held in 
inventory by the Sponsor or new Units created by 
the Sponsor's deposit of additional Securities, 
contracts to purchase additional Securities or 
cash (or a bank letter of credit in lieu of cash) 
with instructions to purchase additional 
Securities. Deposits or purchases of additional 
Securities will be made so as to maintain the 
percentage relationships of shares of Stocks, 
except as discussed under "The Trust". Purchases 
made pursuant to the Reinvestment Plan will be 
made without any sales charge at the net asset 
value for Units of the Trust. Under the 
Reinvestment Plan, the Trust will pay the 
distributions to the Trustee which in turn will 
purchase for those participating Unitholders 
whole Units of the Trust at the price determined 
as of the close of business on the Distribution 
Date and will add such Units to the Unitholder's 
account. The Unitholder's account statement will 
reflect the reinvestment. The Trustee will not 
issue fractional Units, thus any cash remaining 
after purchasing the maximum number of whole 
Units will be distributed to the Unitholder. 
Unitholders wishing to terminate their 
participation in the Reinvestment Plan must 
notify their broker, dealer or financial 
institution of such decision. The Sponsor 
reserves the right to amend, modify or terminate 
the Reinvestment Plan at any time without prior 
notice.

             ADMINISTRATION OF THE TRUST

 Accounts. All dividends and interest received on 
Securities, proceeds from the sale of Securities 
or other moneys received by the Trustee on behalf 
of the Trust may be held in trust in non-interest 
bearing accounts until required to be disbursed.

 The Trustee will credit on its books to an 
Income Account dividends, if any, and interest 
income, on Securities in the Trust. All other 
receipts (i.e., return of principal and gains) 
are credited on its books to a Capital Account. A 
record will be kept of qualifying dividends 
within the Income Account. The pro rata share of 
the Income Account and the pro rata share of the 
Capital Account represented by each Unit will be 
computed by the Trustee as set forth under 
"Valuation".

 The Trustee will deduct from the Income Account 
and, to the extent funds are not sufficient 
therein, from the Capital Account, amounts 
necessary to pay expenses incurred by the Trust. 
(See "Expenses and Charges.") In addition, the 
Trustee may withdraw from the Income Account and 
the Capital Account such amounts as may be 
necessary to cover redemption of Units by the 
Trustee. (See "Redemption.")

 The Trustee may establish reserves (the "Reserve 
Account") within the Trust for state and local 
taxes, if any, and any other governmental charges 
payable out of the Trust.

 Reports and Records. With any distribution from 
the Trust, Unitholders will be furnished with a 
statement setting forth the amount being 
distributed from each account.

 The Trustee keeps records and accounts of the 
Trust at its office in Boston, including records 
of the names and addresses of Unitholders, a 
current list of underlying Securities in the 
portfolio and a copy of the Indenture. Records 
pertaining to a Unitholder or to the Trust (but 
not to other Unitholders) are available to the 
Unitholder for inspection at reasonable times 
during business hours.

 Within a reasonable period of time after the end 
of each calendar year, the Trustee will furnish 
each person who was a Unitholder at any time 
during the calendar year an annual report 
containing the following information, expressed 
in reasonable detail both as a dollar amount and 
as a dollar amount per Unit: (1) a summary of 
transactions for such year in the Income and 
Capital Accounts and any Reserves; (2) any 
Securities sold during the year and the 
Securities held at the end of such year; (3) the 
Trust Fund Evaluation per Unit, based upon a 
computation thereof on the 31st day of December 
of such year (or the last business day prior 
thereto); and (4) amounts distributed to 
Unitholders during such year.

 Portfolio Supervision. The portfolio of the 
Trust is not "managed" by the Sponsor or the 
Trustee; their activities described herein are 
governed solely by the provisions of the 
Indenture. The Indenture provides that the 
Sponsor may (but need not) direct the Trustee to 
dispose of a Security under the following 
circumstances:

 (1) upon the failure of the issuer to declare or 
pay anticipated dividends or interest;

 (2) upon the institution of a materially adverse 
action or proceeding at law or in equity seeking 
to restrain or enjoin the declaration or payment 
of dividends or interest on any such Securities 
or the existence of any other materially adverse 
legal question or impediment affecting such 
Securities or the declaration or payment of 
dividends or interest on the same;

 (3) upon the breach of covenant or warranty in 
any trust indenture or other document relating to 
the issuer which might materially and adversely 
affect either immediately or contingently the 
declaration or payment of dividends on such 
Securities;

 (4) upon the default in the payment of principal 
or par or stated value of, premium, if any, or 
income on any other outstanding securities of the 
issuer or the guarantor of such Securities which 
might materially and adversely, either 
immediately or contingently, affect the 
declaration or payment of dividends on the 
Securities;

 (5) upon the decline in price or the occurrence 
of any materially adverse credit factors, that in 
the opinion of the Sponsor, make the retention of 
such Securities not in the best interest of the 
Unitholder;

 (6) upon a decrease in the Sponsor's internal 
rating of the Security;

 (7) if the sale of such Securities is desirable 
to maintain the qualification of the Trust Fund 
as a "regulated investment company"; or

 (8) upon the happening of events which, in the 
opinion of the Sponsor, negatively affect the 
economic fundamentals of the issuer of the 
Security or the industry of which it is a part.

 Securities may also be tendered or sold in the 
event of a tender offer, merger or acquisition in 
the manner described under "The Trust." The 
Trustee may also dispose of Securities where 
necessary to pay Trust expenses or to satisfy 
redemption requests as directed by the Sponsor 
and in a manner necessary to maximize the 
objectives of the Trust, or if not so directed in 
its own discretion, and Stocks having the 
greatest appreciation shall be sold first.

             AMENDMENT OF THE INDENTURE

 The Indenture may be amended by the Trustee and 
the Sponsor without the consent of any of the 
Unitholders to cure any ambiguity or to correct 
or supplement any provision thereof which may be 
defective or inconsistent or to make such other 
provisions as will not adversely affect the 
interest of the Unitholders.

 The Indenture may also be amended by the Trustee 
and the Sponsor without the consent of any of the 
Unitholders to implement a program to reinvest 
cash proceeds received by the Trust in connection 
with corporate actions and in other situations, 
when and if the Sponsor receives a favorable 
response to the no-action letter request which it 
intends to submit to the Division of Investment 
Management at the SEC discussed above (see 
"Distributions"). There can be no assurance that 
a favorable no-action letter response will be 
received.

 The Indenture may be amended in any respect by 
the Sponsor and the Trustee with the consent of 
the holders of 51% of the Units then outstanding; 
provided that no such amendment shall (1) reduce 
the interest in the Trust represented by a Unit 
or (2) reduce the percentage of Unitholders 
required to consent to any such amendment, 
without the consent of all Unitholders.

 The Trustee will promptly notify Unitholders of 
the substance of any amendment affecting 
Unitholders' rights or their interest in the 
Trust.

             TERMINATION OF THE TRUST

 The Indenture provides that the Trust will 
terminate on the Mandatory Termination Date. If 
the value of the Trust as shown by any evaluation 
is less than fifty per cent (50%) of the market 
value of the Stocks upon completion of the 
deposit of Stocks, the Trustee may in its 
discretion, and will when so directed by the 
Sponsor, terminate such Trust. The Trust may also 
be terminated at any time by the written consent 
of 51% of the Unitholders or by the Trustee upon 
the resignation or removal of the Sponsor if the 
Trustee determines termination to be in the best 
interest of the Unitholders. In no event will the 
Trust continue beyond the Mandatory Termination 
Date.

 Unless advised to the contrary by the Sponsor, 
approximately 20 days prior to the termination of 
the Trust the Trustee will begin to sell the 
Securities held in the Trust and will then, after 
deduction of any fees and expenses of the Trust 
and payment into the Reserve Account of any 
amount required for taxes or other governmental 
charges that may be payable by the Trust, 
distribute to each Unitholder, after due notice 
of such termination, such Unitholder's pro rata 
share in the Income and Capital Accounts. Moneys 
held upon the sale of Securities may be held in 
non-interest bearing accounts created by the 
Indenture until distributed and will be of 
benefit to the Trustee. The sale of Securities in 
the Trust in the period prior to termination may 
result in a lower amount than might otherwise be 
realized if such sale were not required at such 
time due to impending or actual termination of 
the Trust. For this reason, among others, the 
amount realized by a Unitholder upon termination 
may be less than the amount paid by such 
Unitholder.

                  SPONSOR

 The Sponsor, PaineWebber Incorporated, is a 
corporation organized under the laws of the State 
of Delaware. The Sponsor is a member firm of the 
New York Stock Exchange, Inc. as well as other 
major securities and commodities exchanges and is 
a member of the National Association of 
Securities Dealers, Inc. The Sponsor is engaged 
in a security and commodity brokerage business as 
well as underwriting and distributing new issues. 
The Sponsor also acts as a dealer in unlisted 
securities and municipal bonds and in addition to 
participating as a member of various selling 
groups or as an agent of other investment 
companies, executes orders on behalf of 
investment companies for the purchase and sale of 
securities of such companies and sells securities 
to such companies in its capacity as a broker or 
dealer in securities.

 The Indenture provides that the Sponsor will not 
be liable to the Trustee, the Trust or to the 
Unitholders for taking any action or for 
refraining from taking any action made in good 
faith or for errors in judgment, but will be 
liable only for its own willful misfeasance, bad 
faith, gross negligence or willful disregard of 
its duties. The Sponsor will not be liable or 
responsible in any way for depreciation or loss 
incurred by reason of the sale of any Securities 
in the Trust.

 The Indenture is binding upon any successor to 
the business of the Sponsor. The Sponsor may 
transfer all or substantially all of its assets 
to a corporation or partnership which carries on 
the business of the Sponsor and duly assumes all 
the obligations of the Sponsor under the 
Indenture. In such event the Sponsor shall be 
relieved of all further liability under the 
Indenture.

 If the Sponsor fails to undertake any of its 
duties under the Indenture, becomes incapable of 
acting, becomes bankrupt, or has its affairs 
taken over by public authorities, the Trustee may 
either appoint a successor Sponsor or Sponsors to 
serve at rates of compensation determined as 
provided in the Indenture or terminate the 
Indenture and liquidate the Trust.

                  TRUSTEE

 The Trustee is Investors Bank & Trust Company, a 
Massachusetts trust company with its principal 
office at Hancock Towers, 200 Clarendon Street, 
Boston, Massachusetts 02116, toll-free number 
800-356-2754, which is subject to supervision by 
the Massachusetts Commissioner of Banks, the 
Federal Deposit Insurance Corporation and the 
Board of Governors of the Federal Reserve System.

 The Indenture provides that the Trustee will not 
be liable for any action taken in good faith in 
reliance on properly executed documents or the 
disposition of moneys, Securities or Certificates 
or in respect of any valuation which it is 
required to make, except by reason of its own 
gross negligence, bad faith or willful 
misconduct, nor will the Trustee be liable or 
responsible in any way for depreciation or loss 
incurred by reason of the sale by the Trustee of 
any Securities in the Trust. In the event of the 
failure of the Sponsor to act, the Trustee may 
act and will not be liable for any such action 
taken by it in good faith. The Trustee will not 
be personally liable for any taxes or other 
governmental charges imposed upon or in respect 
of the Securities or upon the interest thereon or 
upon it as Trustee or upon or in respect of the 
Trust which the Trustee may be required to pay 
under any present or future law of the United 
States of America or of any other taxing 
authority having jurisdiction. In addition, the 
Indenture contains other customary provisions 
limiting the liability of the Trustee. The 
Trustee will be indemnified and held harmless 
against any loss or liability accruing to it 
without gross negligence, bad faith or willful 
misconduct on its part, arising out of or in 
connection with its acceptance or administration 
of the Trust, including the costs and expenses 
(including counsel fees) of defending itself 
against any claim of liability.

              INDEPENDENT AUDITORS

 The Statement of Financial Condition and 
Schedule of Investments audited by Ernst & Young 
LLP, independent auditors, have been included in 
reliance on their report given on their authority 
as experts in accounting and auditing.

                LEGAL OPINIONS

 The legality of the Units offered hereby has 
been passed upon by Carter, Ledyard & Milburn, 2 
Wall Street, New York, New York, as counsel for 
the Sponsor.
    
                       CONTENTS OF REGISTRATION STATEMENT
          This registration statement comprises the following
  documents:
          The facing sheet.
          The Prospectus.
          The signatures.
          The following exhibits:
          EX-99.C1     Opinion of Counsel as to legality of securities
                       being registered
          EX-99.C2     Consent of Independent Auditors
                             FINANCIAL STATEMENTS
          1.      Statement of Condition of the Trust as shown in
                  the current Prospectus for this series.
          2.      Financial Statements of the Depositor.
                  PaineWebber Incorporated - Financial Statements
                  incorporated by reference to Form 10-k and
                  Form 10-Q (File No. 1-7367) respectively.
  SIGNATURES
  Pursuant to the requirements of the Securities Act of 1933, the
  registrant, The PaineWebber Equity Trust, Growth
  Stock Series 21 certifies that it meets all of the
  requirements for effectiveness of this Registration Statement
  pursuant to Rule 485(b) under the Securities Act of 1933 and has
  duly caused this registration statement to be signed on its behalf
  by the undersigned thereunto duly authorized, and its seal to be 
  hereunto affixed and attested, all in the City of New York, and the
  State of New York on the 29th day of April, 1999.
                     THE PAINEWEBBER EQUITY TRUST,
                     GROWTH STOCK SERIES 21
                                  (Registrant)
                              By: PaineWebber Incorporated
                                  (Depositor)
                              /s/ ROBERT E. HOLLEY
                                  Robert E. Holley
                                  Senior Vice President
  Pursuant to the requirements of the Securities Act of 1933, this
  Registration Statement has been signed on behalf of PaineWebber
  Incorporated, the Depositor, by the following persons in the
  following capacities and in the City of New York, and State of New
  York, on this 29th day of April, 1999.
  PAINEWEBBER INCORPORATED
       Name                        Office
  Donald B. Marron            Chairman, Chief Executive Officer
                              and Director of PaineWebber Incorporated*
  Regina A. Dolan             Executive Vice President,
                              Chief Financial Officer and
                              Director of PaineWebber Incorporated*
  Joseph J. Grano, Jr.        President and
                              Director of PaineWebber Incorporated*
  Steve P. Baum               Executive Vice President and
                              Director of PaineWebber Incorporated*
  Robert H. Silver            Executive Vice President and
                              Director of PaineWebber Incorporated*
  Mark B. Sutton              Executive Vice President and
                              Director of PaineWebber Incorporated*
  Margo N. Alexander          Executive Vice President and
                              Director of PaineWebber Incorporated*
  Terry L. Atkinson           Managing Director and
                              Director of PaineWebber Incorporated*
  Brian M. Barefoot           Executive Vice President and
                              Director of PaineWebber Incorporated*
  Michael Culp                Managing Director and
                              Director of PaineWebber Incorporated*
  Edward M. Kerschner         Managing Director and
                              Director of PaineWebber Incorporated*
  James P. MacGilvray         Executive Vice President and
                              Director of PaineWebber Incorporated*
                              By:/s/ ROBERT E. HOLLEY
                                    Attorney-in-fact*
  *  Executed copies of the powers of attorney have been previously
     filed with the Securities and Exchange Commission with the Post
     Effective Amendment to the Registration Statement File No. 2-61279.
  

  April 29, 1999
  PaineWebber Incorporated
  1200 Harbor Blvd.
  Weehawken, New Jersey 07087
  Ladies and Gentlemen:
  We have served as counsel for PaineWebber Incorporated as
  sponsor and depositor (the "Depositor") of PaineWebber
  Equity Trust,  Growth Stock Series 21 
  (hereinafter referred to as the "Trust"). It is proposed that 
  Post-Effective Amendment No. 1 to the Trust's registration statement
  ("Post-Effective Amendment No. 1") will be filed with the Securities
  and Exchange and dated as of the date hereof in connection with the
  continued issuance by the Trust of an indefinite number of units of
  fractional undivided interest in the Trust (hereinafter referred
  to as the "Units") pursuant to Rule 24f-2 promulgated under the
  provisions of the Investment Company Act of 1940, as amended.
  In this regard, we have examined executed originals or copies of the
  following:
  (a)  The Restated Certificate of Incorporation, as amended, and the
       By-Laws of the Depositor, as amended;
  (b)  Resolutions of the Board of Directors of the Depositor adopted on
       December 3, 1971 relating to the Trust and the sale of the Units;
  (c)  Resolutions of the Executive Committee of the Depositor adopted
       on September 24, 1984;
  (d)  Powers of Attorney referred to in the Amendment;
  (e)  Post-Effective Amendment No. 1 to the Registration Statement on
       Form S-6 (File No. 333-35615) to be filed with the Securities and
       Exchange Commission (the "Commission") in accordance with
       the Securities Act of 1933, as amended, and the rules and
       regulations of the Commission promulgated thereunder
       (collectively, the "1933 Act") proposed to be filed on or about the
       date hereof (the "Amendment");
  (f)  The Notification of Registration of the Trust filed with the
       Commission under the Investment Company Act of 1940, as
       amended (collectively, the "1940 Act") on Form N-8A, as
       amended;
  (g)  The registration of the Trust filed with the Commission under the
       1940 Act on Form N-8B-2 (File No. 811-3722), as amended;
  (h)  The prospectus included in the Amendment (the "Prospectus");
  (i)  The Standard Terms and Conditions of the Trust dated as of
       July 10, 1990, as amended, among the Depositor, and Investors Bank
       & Trust Company (the "Trustee"), (the "Standard Terms");
  (j)  The Trust Indenture dated as of the Initial Date of Deposit, among
       the Depositor, the Trustee and the Evaluator (the "Trust
       Indenture" and, collectively with the Standard Terms, the
       "Indenture and Agreement");
  (k)  The form of certificate of ownership for units (the "Certificate") to
       be issued under the Indenture and Agreement; and
  (l)  Such other pertinent records and documents as we have deemed
       necessary.
       With your permission, in such examination, we have assumed
  the following: (a) the authenticity of original documents and the
  genuineness of all signatures; (b) the conformity to the originals of
  all documents submitted to us as copies; (c) the truth, accuracy,
  and completeness of the information, representations, and warranties
  contained in the records, documents, instruments and certificates we
  have reviewed; (d) except as specifically covered in the opinions set
  forth below, the due authorization, execution, and delivery on behalf
  of the respective parties thereto of documents referred to herein and
  the legal, valid, and binding effect thereof on such parties; and (e)
  the absence of any evidence extrinsic to the provisions of the written
  agreement(s) between the parties that the parties intended a
  meaning contrary to that expressed by those provisions. However,
  we have not examined the securities deposited pursuant to the
  Indenture and Agreement (the "Securities") nor the contracts for the
  Securities.
       We express no opinion as to matters of law in jurisdictions other
  than the State of New York (except "Blue Sky" laws) and the federal laws
  of the United States, except to the extent necessary to render the 
  opinion as to the Depositor in paragraph (i) below with respect to 
  Delaware law.  As you know we are not licensed to practice law in the 
  State of Delaware, and our opinion in paragraph (i) and (iii) as to 
  Delaware law is based solely on review of the official statutes of the 
  State of Delaware.
       Based upon such examination, and having regard for legal
  considerations which we deem relevant, we are of the opinion that:
  (i)  The Depositor is a corporation duly organized, validly existing, and
       in good standing under the laws of the State of Delaware with full
       corporate power to conduct its business as described in the
       Prospectus;
  (ii) The Depositor is duly qualified as a foreign corporation and is in
       good standing as such within the State of New York;
  (iii)The terms and provisions of the Units conform in all material
       respects to the description thereof contained in the Prospectus;
  (iv) The consummation of the transactions contemplated under the
       Indenture and Agreement and the fulfillment of the terms thereof
       will not be in violation of the Depositor's Restated Certificate of
       Incorporation, as amended, or By-Laws, as amended and will not
       conflict with any applicable laws or regulations applicable to the
       Depositor in effect on the date hereof; and
  (v)  The Certificates to be issued by the Trust, when duly executed by
       the Depositor and the Trustee in accordance with the Indenture
       and Agreement, upon delivery against payment therefor as
       described in the Prospectus will constitute fractional undivided
       interests in the Trust enforceable against the Trust in accordance
       with their terms, will be entitled to the benefits of the Indenture
       and Agreement and will be fully paid and non-assessable.
  Our opinion that any document is valid, binding, or enforceable in
  accordance with its terms is qualified as to:
  (a)  limitations imposed by bankruptcy, insolvency, reorganization,
       arrangement, fraudulent conveyance, moratorium, or other laws
       relating to or affecting the enforcement of creditors' rights
       generally;
  (b)  rights to indemnification and contribution which may be limited by
       applicable law or equitable principles; and
  (c)  general principles of equity, regardless of whether such
       enforceability is considered in a proceeding in equity or at law.
       We hereby represent that the Amendment contains no disclosure
  which would render it ineligible to become effective immediately
  upon filing pursuant to paragraph (b) of Rule 485 of the
  Commission.
       We hereby consent to the filing of this opinion as an exhibit to
  the Amendment and to the use of our name wherever it appears in
  the Amendment and the Prospectus.
  Very truly yours,
  /s/ CARTER, LEDYARD & MILBURN

  INDEPENDENT AUDITORS' CONSENT
  We consent to the reference to our firm under the caption
  "Independent Auditors" and to the use of our report dated
  April 15, 1999, in the Registration Statement and related
  Prospectus of the PaineWebber Equity Trust, Growth Stock
  Series 21
  /s/ ERNST & YOUNG LLP
  New York, New York
  April 28, 1999


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