MERRILL LYNCH & CO INC
424B5, 1997-05-30
SECURITY BROKERS, DEALERS & FLOTATION COMPANIES
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<PAGE>
                                                Filed Pursuant to Rule 424(b)(5)
                                                      Registration No. 333-25255
 
PROSPECTUS SUPPLEMENT
(TO PROSPECTUS DATED MAY 28, 1997)
 
                                     [LOGO]
 
                                25,500,000 UNITS
 
                           MERRILL LYNCH & CO., INC.
 
        NIKKEI 225 MARKET INDEX TARGET-TERM SECURITIES DUE JUNE 14, 2002
                         "MITTS-REGISTERED TRADEMARK-"
                        ($10 PRINCIPAL AMOUNT PER UNIT)
 
<TABLE>
<S>                                                 <C>
GENERAL:
- - Senior unsecured debt securities                  - Not redeemable prior to maturity
- - No payments prior to maturity                     - Transferable only in whole Units
 
PAYMENT AT MATURITY:
</TABLE>
 
               Principal Amount + Supplemental Redemption Amount
 
The Supplemental Redemption Amount will be based on the percentage change in the
Nikkei Stock Average multiplied by a Participation Rate of 140%. The
Supplemental Redemption Amount may be ZERO, but will not be less than zero.
 
BEFORE YOU DECIDE TO INVEST IN THE MITTS, CAREFULLY READ THIS PROSPECTUS
SUPPLEMENT AND PROSPECTUS, ESPECIALLY THE RISK FACTORS BEGINNING ON PAGE S-7.
 
Neither the Securities and Exchange Commission (the "SEC") nor any state
securities commision has approved these securities or passed upon the adequacy
of this Prospectus Supplement or attached Prospectus. Any representation to the
contrary is a criminal offense.
 
<TABLE>
<CAPTION>
                                                       INITIAL PUBLIC       UNDERWRITING        PROCEEDS TO
                                                     OFFERING PRICE(1)      DISCOUNT(1)          COMPANY(2)
<S>                                                  <C>                 <C>                 <C>
Per MITTS..........................................         $10                 $.20               $9.80
Total..............................................     $255,000,000         $5,100,000         $249,900,000
</TABLE>
 
(1) The "Initial Public Offering Price" and "Underwriting Discount" for any
    single transaction to purchase 500,000 Units or more will be $9.90 per Unit
    and $.10 per Unit, respectively.
 
(2) Before deduction of expenses payable by Merrill Lynch & Co., Inc.
 
    We expect that the MITTS will be ready for delivery in book-entry form only
through the facilities of DTC, on or about June 3, 1997 against payment in
immediately available funds.
                            ------------------------
 
                              MERRILL LYNCH & CO.
                                ---------------
 
            The date of this Prospectus Supplement is May 28, 1997.
 
- ------------------------
 
"MITTS" is a registered service mark and "Market Index Target-Term Securities"
is a service mark owned by Merrill Lynch & Co., Inc.
<PAGE>
STABILIZATION
 
    Certain persons participating in this offering may engage in transactions
that stabilize, maintain or otherwise affect the price of the MITTS. Such
transactions may include stabilizing, the purchase of MITTS to cover syndicate
short positions and the imposition of penalty bids. For a description of these
activities, see "Underwriting".
 
REQUIRED LEGEND
 
    We are required to disclose that the Commissioner of Insurance of the State
of North Carolina has not approved or disapproved the offering of the MITTS nor
has the Commissioner determined the accuracy or adequacy of this Prospectus
Supplement or the Prospectus.
 
CONTENT OF PROSPECTUS
 
    You should rely only on the information contained in this document or in
documents we filed with the SEC that we have referred you to. We have not
authorized anyone to provide you with different information. You should not
assume that the information in the Prospectus or Prospectus Supplement is
accurate as of any date other than the date on the front of this document.
 
LIMITATIONS ON OFFERS OR SOLICITATIONS
 
    We do not intend this document to be an offer or solicitation:
 
       (A) if used in a jurisdiction in which such offer or solicitation is not
           authorized;
 
       (B) if the person making such offer or solicitation is not qualified to
           do so; or
 
       (C) if such offer or solicitation is made to anyone to whom it is
           unlawful to make such offer or solicitation.
 
                                      S-2
<PAGE>
                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                   PAGE
                                                 ---------
<S>                                              <C>
THE PROSPECTUS SUPPLEMENT:
 
SUMMARY INFORMATION--Q&A.......................        S-4
  What are the MITTS?..........................        S-4
  What will I receive at maturity of the
    MITTS?.....................................        S-4
  How has the Nikkei 225 Index performed
    historically?..............................        S-5
  What about taxes?............................        S-5
  Who publishes the Nikkei 225 Index and what
    does it measure?...........................        S-6
  Will the MITTS be listed on a stock
    exchange?..................................        S-6
  What is the role of our subsidiary,
    MLPF&S?....................................        S-6
  Can you tell me more about the Company?......        S-6
  Are there any risks associated with my
    investment?................................        S-6
 
WHERE YOU CAN FIND MORE INFORMATION............        S-7
 
RISK FACTORS...................................        S-7
  The Supplemental Redemption Amount...........        S-7
  Your yield may be lower than the yield on a
    standard debt security of comparable
    maturity...................................        S-7
  Your return will not reflect the payment of
    dividends..................................        S-7
  Currency exchange rate.......................        S-8
  Uncertain trading market.....................        S-8
  Factors affecting trading value of the
    MITTS......................................        S-8
  State law limits on interest paid............        S-9
  The Japanese securities market...............        S-9
  Purchases and sales by Merrill Lynch.........       S-10
  Potential conflicts..........................       S-10
 
RATIO OF EARNINGS TO FIXED CHARGES.............       S-10
 
DESCRIPTION OF SECURITIES......................       S-11
  General......................................       S-11
 
<CAPTION>
                                                   PAGE
                                                 ---------
<S>                                              <C>
  Payment at Maturity..........................       S-11
  Hypothetical Returns.........................       S-12
  Adjustments to the Index; Market Disruption
    Events.....................................       S-13
  Discontinuance of the Index..................       S-14
  Events of Default and Acceleration...........       S-14
  Depository...................................       S-15
  Same-Day Settlement and Payment..............       S-16
 
THE INDEX......................................       S-17
  General......................................       S-17
  The Tokyo Stock Exchange.....................       S-18
  Historical Data on the Index.................       S-18
 
CERTAIN UNITED STATES FEDERAL INCOME TAX
  CONSIDERATIONS...............................       S-21
  General......................................       S-21
  U.S. Holders.................................       S-22
  Non-U.S. Holders.............................       S-24
  Backup Withholding...........................       S-24
 
USE OF PROCEEDS................................       S-25
 
UNDERWRITING...................................       S-25
 
VALIDITY OF SECURITIES.........................       S-26
 
INDEX OF DEFINED TERMS.........................       S-27
 
THE PROSPECTUS:
 
AVAILABLE INFORMATION..........................          2
INCORPORATION OF CERTAIN DOCUMENTS BY
  REFERENCE....................................          2
MERRILL LYNCH & CO., INC.......................          3
USE OF PROCEEDS................................          3
DESCRIPTION OF DEBT SECURITIES.................          4
DESCRIPTION OF DEBT WARRANTS...................          8
DESCRIPTION OF CURRENCY WARRANTS...............          9
DESCRIPTION OF INDEX WARRANTS..................         10
PLAN OF DISTRIBUTION...........................         15
EXPERTS........................................         16
</TABLE>
 
                                      S-3
<PAGE>
                            SUMMARY INFORMATION--Q&A
 
This summary includes questions and answers that highlight selected information
from the Prospectus and Prospectus Supplement to help you understand the MITTS.
You should carefully read the entire Prospectus and Prospectus Supplement to
fully understand the terms of the MITTS, the Nikkei Stock Average (the "Nikkei
225 Index" or the "Index"), as well as the tax and other considerations that are
important to you in making a decision about whether to invest in the MITTS. You
should, in particular, carefully review the "Risk Factors" section, which
highlights certain risks, to determine whether an investment in the MITTS is
appropriate for you.
 
WHAT ARE THE MITTS?
 
    The MITTS are a series of senior debt securities issued by Merrill Lynch &
Co., Inc. (the "Company"). The MITTS are not secured by collateral. The MITTS
will rank equally with all other unsecured and unsubordinated debt of the
Company. The MITTS mature on June 14, 2002 and do not provide for earlier
redemption. We will make no payments on the MITTS until maturity.
 
    Each "Unit" of MITTS represents $10 principal amount of MITTS. You may
transfer the MITTS only in whole Units. You will not have the right to receive
physical certificates evidencing your ownership except under limited
circumstances. Instead, we will issue the MITTS in the form of a global
certificate, which will be held by The Depository Trust Company ("DTC"), or its
nominee. Direct and indirect participants in DTC will record beneficial
ownership of the MITTS by individual investors. You should refer to the section
"Description of the MITTS--Depository" in this Prospectus Supplement.
 
WHAT WILL I RECEIVE AT MATURITY OF THE MITTS?
 
    We have designed the MITTS for investors who want to protect their
investment by receiving at least the principal amount of their investment at
maturity and who also want to participate in a possible increase in the Nikkei
225 Index. At maturity, you will receive a payment on the MITTS equal to the sum
of two amounts: the principal amount and the "Supplemental Redemption Amount",
which is based on the percentage change in the Nikkei 225 Index.
 
    PRINCIPAL AMOUNT
 
    The principal amount per Unit is $10.
 
    SUPPLEMENTAL REDEMPTION AMOUNT
 
    The Supplemental Redemption Amount per Unit will equal:
 
<TABLE>
<S>        <C>         <C>
           EIV-SIV
$10 X      -------       X PR
           SIV
</TABLE>
 
but will not be less than zero.
 
EIV = Ending Index Value
 
SIV = Starting Index Value
 
PR = Participation Rate
 
    "ENDING INDEX VALUE" means the average of the values of the Nikkei 225 Index
at the close of the market on five business days before the maturity of the
MITTS. We may calculate the Ending Index Value by reference to fewer than five
or even a single day's closing value if, during the days prior to the maturity
date of the MITTS, there is a disruption in the trading of the securities
comprising the Nikkei 225 Index or certain instruments linked to the Nikkei 225
Index.
 
    "STARTING INDEX VALUE" equals 20,351.34, which was the value of the Index at
the market close on the date the MITTS were priced for initial sale to the
public (the "Pricing Date").
 
    "PARTICIPATION RATE" equals 140%.
 
    For more specific information about the Supplemental Redemption Amount,
please see the section "Description of Securities" in this Prospectus
Supplement.
 
    We will pay you a Supplemental Redemption Amount only if the Ending Index
Value is greater than the Starting Index Value. IF THE ENDING INDEX VALUE IS
LESS THAN, OR EQUAL TO, THE STARTING INDEX VALUE, THE SUPPLEMENTAL REDEMPTION
AMOUNT WILL BE ZERO. We will pay you the principal amount of the MITTS
regardless of whether any Supplemental Redemption Amount is payable.
 
                                      S-4
<PAGE>
 


    SUPPLEMENTAL REDEMPTION AMOUNT--EXAMPLES
 
    Here are two examples of Supplemental Redemption Amount calculations:
 
Example 1: Nikkei 225 Index decreases below the Starting Index Value
- ----------
Starting Index Value: 20,351.34
Hypothetical Ending Index Value: 16,000.00
Participation Rate: 140%


<TABLE>
<S>                                                 <C>                  <C>
                                                    16,000.00 - 20,351.34
Supplemental Redemption Amount (Per Unit) = $10 X   ---------------------    X 140% = $0.00
                                                         20,351.34
                                                                         (cannot be
                                                                                    less than
                                                                                   zero)
Total payment at maturity (Per Unit) = $10 + $0 = $10
 
Example 2: Nikkei 225 Index increases above the Starting Index Value
- ----------
Starting Index Value: 20,351.34
Hypothetical Ending Index Value: 27,794.12
Participation Rate: 140%
</TABLE>
 
<TABLE>
<S>                                                 <C>                  <C>
                                                    27,794.12 - 20,351.34
Supplemental Redemption Amount (Per Unit) = $10 X   ---------------------  X 140% = $5.12
                                                          20,351.34
Total payment at maturity (Per Unit) = $10 + $5.12 = $15.12
</TABLE>
 
HOW HAS THE NIKKEI 225 INDEX PERFORMED HISTORICALLY?
 
    We have provided a table showing the closing values of the Nikkei 225 Index
on the last business day of each year from 1966 to 1996 and on the last business
day of each month from January 1992 to April 1997, as published by Nihon Keizai
Shimbun, Inc. ("NKS"). You can find this table in the section "The
Index--Historical Data on the Index" in the Prospectus Supplement. We have
provided this historical information to help you evaluate the behavior of the
Nikkei 225 Index in various economic environments; however, past performance is
not necessarily indicative of how the Index will perform in the future.
 
WHAT ABOUT TAXES?
 
    You will be required to pay taxes on ordinary income from the MITTS over
their term based upon an estimated yield for the MITTS, even though you will not
receive any payments from us until maturity. We have determined this estimated
yield, in accordance with regulations issued by the Treasury Department, solely
in order for you to figure the amount of taxes that you will owe each year as a
result of owning a MITTS. This estimate is neither a prediction nor a guarantee
of what the actual Supplemental Redemption Amount will be, or that the actual
Supplemental Redemption Amount will even exceed zero. We have determined that
this estimated yield will equal 6.96% per annum (compounded semiannually).
 
    Based upon this estimated yield, if you pay your taxes on a calendar year
basis and if you buy a MITTS for $10 and hold the MITTS until maturity, you will
be required to pay taxes on the following amounts of ordinary income from the
MITTS each year: $.4047 in 1997, $.7350 in 1998, $.7886 in 1999, $.8448 in 2000,
$.9045 in 2001 and $.4302 in 2002. However, in 2002, the amount of ordinary
income that you will be required to pay taxes on from owning a MITTS may be
greater or less than $.4302, depending upon the amount you receive at maturity.
Also, if the sum of the principal amount and the Supplemental Redemption Amount
is less than $14.1078, you may have a loss which you could deduct against other
income you may have in 2002, but, under current tax regulations, you would
neither be required nor allowed to amend tax returns for prior years. For
further information, see "Certain United States Federal Income Tax
Considerations" in this Prospectus Supplement.
 
                                      S-5
<PAGE>
WHO PUBLISHES THE NIKKEI 225 INDEX AND WHAT DOES IT MEASURE?
 
    The Nikkei 225 Index is a stock index published by NKS that measures the
composite price performance of selected Japanese stocks. The Nikkei 225 Index is
currently based on 225 common stocks traded on the Tokyo Stock Exchange (the
"TSE") and represents a broad cross section of Japanese industry. All 225
underlying stocks are stocks listed in the First Section of the TSE and are,
therefore, among the most actively traded stocks on the TSE. The Nikkei 225
Index is a modified, price-weighted index which means an underlying stock's
weight in the index is based on its price per share rather than the total market
capitalization of the issuer.
 
WILL THE MITTS BE LISTED ON A STOCK EXCHANGE?
 
    The MITTS have been approved for listing on the New York Stock Exchange
under the symbol "JEM", subject to official notice of issuance.
 
WHAT IS THE ROLE OF OUR SUBSIDIARY, MLPF&S?
 
    Our subsidiary, Merrill Lynch, Pierce, Fenner & Smith Incorporated
("MLPF&S"), is the underwriter for the offering and sale of the MITTS. After the
initial offering, MLPF&S intends to buy and sell MITTS to create a secondary
market for holders of the MITTS, and to stabilize or maintain the market price
of the MITTS. However, MLPF&S will not be obligated to engage in any of these
market activities, or continue them once it has started.
 
    MLPF&S will also be our agent (the "Calculation Agent") for purposes of
calculating the Starting Index Value and the Ending Index Value and the other
amounts for the MITTS, including the Supplemental Redemption Amount. Under
certain circumstances, these duties could result in a conflict of interest
between MLPF&S's status as a subsidiary of the Company and its responsibilities
as Calculation Agent.
 
CAN YOU TELL ME MORE ABOUT THE COMPANY?
 
    Merrill Lynch & Co., Inc. is a holding company with various subsidiary and
affiliated companies that provide investment, financing, insurance and related
services on a global basis. For information about the Company see the section
"Merrill Lynch & Co., Inc." in the Prospectus. You should also read the other
documents the Company has filed with the SEC, which you can find by referring to
the section "Where You Can Find More Information" in this Prospectus Supplement.
 
ARE THERE ANY RISKS ASSOCIATED WITH MY INVESTMENT?
 
    Yes, the MITTS are subject to certain risks. Please refer to the section
"Risk Factors" in this Prospectus Supplement.
 
                                      S-6
<PAGE>
                      WHERE YOU CAN FIND MORE INFORMATION
 
    The Company files annual, quarterly and current reports, proxy statements
and other information with the SEC. Some of these documents are incorporated by
reference in, and form a part of, this Prospectus Supplement and the Prospectus,
as described in the section "Incorporation of Certain Documents by Reference" in
the Prospectus. You may read and copy any document we file by visiting the SEC's
public reference rooms in Washington, D.C. at 450 Fifth Street, Room 1024, N.W.,
Washington, D.C., 20549; or at the SEC's regional offices at 500 West Madison
Street, Suite 400, Chicago, Illinois 60661-2511 and Seven World Trade Center,
New York, New York 10048. Please call the SEC at 1-800-SEC-0330 for further
information about the public reference rooms. Copies of our SEC filings can also
be obtained from the SEC's Internet Web site at http://www.sec.gov. You may also
read copies of these documents at the offices of the New York Stock Exchange,
the American Stock Exchange, the Chicago Stock Exchange, and the Pacific
Exchange.
 
    We will send you copies of our SEC filings, without exhibits, at no cost
upon request. Please address your request to Lawrence M. Egan, Jr., Corporate
Secretary's Office, Merrill Lynch & Co., Inc., 100 Church Street, 12th Floor,
New York, New York 10080-6512; telephone number (212) 602-8435.
 
                                  RISK FACTORS
 
    Your investment in MITTS will involve certain risks. For example, there is
the risk that you might not earn a return on your investment, and the risk that
you will be unable to sell your MITTS prior to their maturity. You should
carefully consider the following discussion of risks before deciding whether an
investment in the MITTS is suitable for you.
 
THE SUPPLEMENTAL REDEMPTION AMOUNT.
 
    You should be aware that if the Ending Index Value does not exceed the
Starting Index Value at maturity, the Supplemental Redemption Amount will be
zero. This will be true even if the value of the Index was higher than the
Starting Index Value at some time during the life of the MITTS but later falls
below the Starting Index Value. If the Supplemental Redemption Amount is zero,
we will pay you only the principal amount of your MITTS.
 
    The Participation Rate equals 140%. If the Ending Index Value exceeds the
Starting Index Value, then the Participation Rate will enhance the amount of the
interest payment received at maturity. However, if the Ending Index Value does
not exceed the Starting Index Value you will receive only the principal amount
of your MITTS.
 
YOUR YIELD MAY BE LOWER THAN THE YIELD ON A STANDARD DEBT SECURITY OF COMPARABLE
  MATURITY.
 
    The amount we pay you at maturity may be less than the return you could earn
on other investments. Your yield may be less than the yield you would earn if
you bought a standard senior non-callable debt security of the Company with the
same maturity date. Your investment may not reflect the full opportunity cost to
you when you consider the effect of inflation or other factors that affect the
time value of money.
 
YOUR RETURN WILL NOT REFLECT THE PAYMENT OF DIVIDENDS.
 
    NKS calculates the Index by reference to the prices of the common stocks
comprising the Index without taking into consideration the value of dividends
paid on those stocks. Therefore, the return you earn on the MITTS, if any, will
not be the same as the return that you would earn if you actually owned each of
the common stocks in the Index and received the dividends paid on those stocks.
 
                                      S-7
<PAGE>
CURRENCY EXCHANGE RATE.
 
    Although the stocks comprising the Index are traded in Japanese yen and the
MITTS are denominated in U.S. dollars, we will not adjust the Supplemental
Redemption Amount for the currency exchange rate in effect at the maturity of
the MITTS. The Supplemental Redemption Amount is based solely upon the
percentage increase in the Index. Changes in the exchange rate, however, may
reflect changes in the Japanese economy which may affect the value of the Index
and the MITTS.
 
UNCERTAIN TRADING MARKET.
 
    The MITTS have been approved for listing on the New York Stock Exchange
under the symbol "JEM", subject to official notice of issuance. While there have
been a number of issuances of Market Index Target-Term Securities, trading
volumes have varied historically from one transaction to another and it is
therefore impossible to predict how the MITTS will trade. You cannot assume that
a trading market will develop for the MITTS. If such a trading market does
develop, there can be no assurance that there will be liquidity in the trading
market. The development of a trading market for the MITTS will depend on the
financial performance of the Company, and other factors such as the
appreciation, if any, of the value of the Index.
 
    If the trading market for the MITTS is limited, there may be a limited
number of buyers when you decide to sell your MITTS if you do not wish to hold
your investment until maturity. This may affect the price you receive.
 
FACTORS AFFECTING TRADING VALUE OF THE MITTS.
 
    We believe that the market value of the MITTS will be affected by the value
of the Index and by a number of other factors. Some of these factors are
interrelated in complex ways; as a result, the effect of any one factor may be
offset or magnified by the effect of another factor. The following bullets
describe the expected impact on the market value of the MITTS given a change in
a specific factor, assuming all other conditions remain constant.
 
    - INDEX VALUE. We expect that the market value of the MITTS will depend
      substantially on the amount by which the Index exceeds the Starting Index
      Value. If you choose to sell your MITTS when the value of the Index
      exceeds the Starting Index Value, you may receive substantially less than
      the amount that would be payable at maturity based on that Index value
      because of the expectation that the Index will continue to fluctuate until
      the Ending Index Value is determined. If you choose to sell your MITTS
      when the value of the Index is below the Starting Index Value, you may
      receive less than the $10 principal amount per Unit of MITTS. In general,
      rising Japanese dividend rates (I.E., dividends per share) may increase
      the value of the Index while falling Japanese dividend rates may decrease
      the value of the Index. Political, economic and other developments that
      affect the stocks underlying the Index may also affect the value of the
      Index and the value of the MITTS.
 
    - INTEREST RATES. Because the MITTS repay, at a minimum, the principal
      amount at maturity, we expect that the trading value of the MITTS will be
      affected by changes in interest rates. In general, if U.S. interest rates
      increase, we expect that the trading value of the MITTS will decrease. If
      U.S. interest rates decrease, we expect the trading value of the MITTS
      will increase. In general, if interest rates in Japan increase, we expect
      that the trading value of the MITTS will increase. If interest rates in
      Japan decrease, we expect the trading value of the MITTS will decrease.
      However, interest rates in Japan may also affect the Japanese economy and,
      in turn, the value of the Index. Rising interest rates in Japan may lower
      the value of the Index and the MITTS. Falling interest rates in Japan may
      increase the value of the Index and the value of the MITTS.
 
    - VOLATILITY OF THE INDEX. Volatility is the term used to describe the size
      and frequency of market fluctuations. If the volatility of the Index
      increases, we expect that the trading value of the MITTS
 
                                      S-8
<PAGE>
      will increase. If the volatility of the Index decreases, we expect that
      the trading value of the MITTS will decrease.
 
    - TIME REMAINING TO MATURITY. The MITTS may trade at a value above that
      which would be expected based on the level of interest rates and the
      Index. This difference will reflect a "time premium" due to expectations
      concerning the value of the Index during the period prior to maturity of
      the MITTS. However, as the time remaining to maturity of the MITTS
      decreases, we expect that this time premium will decrease, lowering the
      trading value of the MITTS.
 
    - DIVIDEND YIELDS. If dividend yields on the stocks comprising the Index
      increase, we expect that the value of the MITTS will decrease. Conversely,
      if dividend yields on the stocks comprising the Index decrease, we expect
      that the value of the MITTS will increase.
 
    - COMPANY CREDIT RATINGS. Real or anticipated changes in the Company's
      credit ratings may affect the market value of the MITTS.
 
    We want you to understand that the impact of one of the factors specified
above, such as an increase in interest rates, may offset some or all of any
change in the trading value of the MITTS attributable to another factor, such as
an increase in the Index value.
 
    In general, assuming all relevant factors are held constant, we expect that
the effect on the trading value of the MITTS of a given change in most of the
factors listed above will be less if it occurs later in the term of the MITTS
than if it occurs earlier in the term of the MITTS except that we expect that
the effect on the trading value of the MITTS of a given increase in the value of
the Index will be greater if it occurs later in the term of the MITTS than if it
occurs earlier in the term of the MITTS.
 
STATE LAW LIMITS ON INTEREST PAID.
 
    New York State laws govern the 1983 Indenture. New York has certain usury
laws that limit the amount of interest that can be charged and paid on loans,
which includes debt securities like the MITTS. Under present New York law, the
maximum rate of interest is 25% per annum on a simple interest basis. This limit
may not apply to debt securities in which $2,500,000 or more has been invested.
 
    While we believe that New York law would be given effect by a state or
Federal court sitting outside of New York, many other states also have laws that
regulate the amount of interest that may be charged to and paid by a borrower.
We will promise, for the benefit of the MITTS holders, to the extent permitted
by law, not to voluntarily claim the benefits of any laws concerning usurious
rates of interest.
 
THE JAPANESE SECURITIES MARKET.
 
    The underlying stocks that constitute the Index have been issued by Japanese
companies. You should be aware that investments in securities indexed to the
value of Japanese equity securities involve certain risks. The Japanese
securities markets may be more volatile than U.S. or other securities markets
and may be affected by market developments in different ways than U.S. or other
securities markets. Direct or indirect government intervention to stabilize the
Japanese securities markets and cross-shareholdings in Japanese companies on
such markets may affect prices and volume of trading on those markets. Also,
there is generally less publicly available information about Japanese companies
than about those U.S. companies that are subject to the reporting requirements
of the U.S. Securities and Exchange Commission, and Japanese companies are
subject to accounting, auditing and financial reporting standards and
requirements that differ from those applicable to U.S. reporting companies.
 
    Securities prices in Japan are subject to political, economic, financial and
social factors that apply in Japan. These factors (including the possibility
that recent or future changes in the Japanese government's economic and fiscal
policies, the possible imposition of, or changes in, currency exchange laws or
other
 
                                      S-9
<PAGE>
Japanese laws or restrictions applicable to Japanese companies or investments in
Japanese equity securities and the possibility of fluctuations in the rate of
exchange between currencies) could negatively affect the Japanese securities
markets. Moreover, the Japanese economy may differ favorably or unfavorably from
the U.S. economy in such respects as growth of gross national product, rate of
inflation, capital reinvestment, resources and self-sufficiency.
 
PURCHASES AND SALES BY MERRILL LYNCH.
 
    The Company, MLPF&S, and other affiliates of the Company may from time to
time buy or sell the stocks underlying the Index for their own accounts for
business reasons or in connection with hedging the Company's obligations under
the MITTS. These transactions could affect the price of such stocks and the
value of the Index.
 
POTENTIAL CONFLICTS.
 
    Under certain circumstances, MLPF&S's roles as a subsidiary of the Company,
a counterparty of the Company's hedge, the Underwriter and the Calculation Agent
for the MITTS could give rise to conflicts of interests.
 
                       RATIO OF EARNINGS TO FIXED CHARGES
 
    The following table sets forth the historical ratios of earnings to fixed
charges for the periods indicated:
<TABLE>
<CAPTION>
                                                                         YEAR ENDED LAST FRIDAY IN DECEMBER
 
<S>                                                        <C>          <C>          <C>          <C>          <C>
                                                              1992         1993         1994         1995         1996
                                                              -----        -----        -----        -----        -----
Ratio of earnings to fixed charges.......................         1.3          1.4          1.2          1.2          1.2
 
<CAPTION>
<S>                                                        <C>
                                                            THREE MONTHS
                                                               ENDED
                                                            MARCH 28, 1997
                                                           -----------------
Ratio of earnings to fixed charges.......................            1.2
</TABLE>
 
    For the purpose of calculating the ratio of earnings to fixed charges,
"earnings" consists of earnings from continuing operations before income taxes
and fixed charges. "Fixed charges" consists of interest costs, amortization of
debt expense, preferred stock dividend requirements of majority-owned
subsidiaries, and that portion of rentals estimated to be representative of the
interest factor.
 
                                      S-10
<PAGE>
                           DESCRIPTION OF SECURITIES
 
GENERAL
 
    The Nikkei 225 Market Index Target-Term Securities due June 14, 2002, which
are referred to herein as the "MITTS" or the "Securities", are to be issued as a
series of Senior Debt Securities under the Senior Indenture, referred to as the
"1983 Indenture", which is more fully described in the accompanying Prospectus.
The Securities will mature on June 14, 2002.
 
    While at maturity a beneficial owner of a Security will receive the
principal amount of such Security plus the Supplemental Redemption Amount, if
any, there will be no other payment of interest, periodic or otherwise. See
"Payment at Maturity" below.
 
    The Securities are not subject to redemption by the Company or at the option
of any beneficial owner prior to maturity. Upon the occurrence of an Event of
Default with respect to the Securities, beneficial owners of the Securities may
accelerate the maturity of the Securities, as described under "Description of
Securities -- Events of Default and Acceleration" in this Prospectus Supplement
and "Description of Debt Securities -- General -- Events of Default" in the
accompanying Prospectus.
 
    The Securities are to be issued in denominations of whole Units.
 
PAYMENT AT MATURITY
 
GENERAL
 
    At maturity, a beneficial owner of a Security will be entitled to receive
the principal amount thereof plus a Supplemental Redemption Amount, if any, as
provided below. If the Ending Index Value does not exceed the Starting Index
Value, a beneficial owner of a Security will be entitled to receive only the
principal amount thereof. The principal amount for a Security will equal the
initial issue price of $10 per Unit of MITTS.
 
DETERMINATION OF THE SUPPLEMENTAL REDEMPTION AMOUNT
 
    The Supplemental Redemption Amount for a Security will be determined by the
Calculation Agent and will equal:

<TABLE>
<S>                                                                                                            <C>
Principal amount of such Security ($10 per Unit) X Ending Index Value-Starting Index Value X Participation Rate
                                                   ---------------------------------------
                                                            Starting Index Value

</TABLE>

provided, however, that in no event will the Supplemental Redemption Amount be
less than zero. As indicated in the formula above, the Supplemental Redemption
Amount for the MITTS will be calculated using the principal amount of the MITTS.
 
    The Participation Rate equals 140%. The Starting Index Value equals
20,351.34, which was the closing value of the Index on the Pricing Date. The
Ending Index Value will be determined by the Calculation Agent and will equal
the average (arithmetic mean) of the closing values of the Index determined on
each of the first five Calculation Days during the Calculation Period. If there
are fewer than five Calculation Days, then the Ending Index Value will equal the
average (arithmetic mean) of the closing values of the Index on such Calculation
Days, and if there is only one Calculation Day, then the Ending Index Value will
equal the closing value of the Index on such Calculation Day. If no Calculation
Days occur during the Calculation Period because of Market Disruption Events,
then the Ending Index Value will equal the closing value of the Index determined
on the last scheduled Index Business Day in the Calculation Period, regardless
of the occurrence of a Market Disruption Event on such day. The "Calculation
Period" means the period from and including the seventh scheduled Index Business
Day prior to the maturity date to and including the second scheduled Index
Business Day prior to the maturity date. "Calculation Day" means any Index
Business Day during the Calculation Period on which a Market Disruption Event
has not occurred. For purposes of determining the Ending Index Value, an "Index
Business Day" is a day on which
 
                                      S-11
<PAGE>
the New York Stock Exchange and the American Stock Exchange are open for trading
and the Index or any Successor Index, as defined below, is calculated and
published. All determinations made by the Calculation Agent shall be at the sole
discretion of the Calculation Agent and, absent a determination by the
Calculation Agent of a manifest error, shall be conclusive for all purposes and
binding on the Company and beneficial owners of the Securities.
 
HYPOTHETICAL RETURNS
 
    The following table illustrates, for a range of hypothetical Ending Index
Values, (i) the total amount payable at maturity for each $10 principal amount
of Securities, (ii) the total rate of return to beneficial owners of the
Securities, (iii) the pretax annualized rate of return to beneficial owners of
Securities, and (iv) the pretax annualized rate of return of an investment in
the stocks underlying the Index (which includes an assumed aggregate dividend
yield of .75% per annum, as more fully described below).
 
<TABLE>
<CAPTION>
                                              TOTAL AMOUNT
                                           PAYABLE AT MATURITY  TOTAL RATE OF       PRETAX          PRETAX ANNUALIZED
   HYPOTHETICAL       PERCENTAGE CHANGE     PER $10 PRINCIPAL     RETURN ON     ANNUALIZED RATE     RATE OF RETURN OF
      ENDING          OVER THE STARTING         AMOUNT OF            THE         OF RETURN ON     STOCKS UNDERLYING THE
   INDEX VALUE           INDEX VALUE           SECURITIES        SECURITIES    THE SECURITIES(1)       INDEX(1)(2)
- ------------------  ---------------------  -------------------  -------------  -----------------  ---------------------
<S>                 <C>                    <C>                  <C>            <C>                <C>
8,140.54.......                 -60%            $   10.00              0.00%            0.00%              -17.13%
10,175.67......                 -50%            $   10.00              0.00%            0.00%              -12.86%
12,210.80......                 -40%            $   10.00              0.00%            0.00%               -9.33%
14,245.94......                 -30%            $   10.00              0.00%            0.00%               -6.32%
16,281.07......                 -20%            $   10.00              0.00%            0.00%               -3.69%
18,316.21......                 -10%            $   10.00              0.00%            0.00%               -1.35%
20,351.34(3)                      0%            $   10.00              0.00%            0.00%                0.75%
22,386.47......                  10%            $   11.40             14.00%            2.62%                2.66%
24,421.61......                  20%            $   12.80             28.00%            4.97%                4.42%
26,456.74......                  30%            $   14.20             42.00%            7.09%                6.04%
28,491.88......                  40%            $   15.60             56.00%            9.04%                7.55%
30,527.01......                  50%            $   17.00             70.00%           10.83%                8.96%
32,562.14......                  60%            $   18.40             84.00%           12.50%               10.29%
34,597.28......                  70%            $   19.80             98.00%           14.05%               11.54%
36,632.41......                  80%            $   21.20            112.00%           15.51%               12.72%
38,667.55......                  90%            $   22.60            126.00%           16.88%               13.84%
40,702.68......                 100%            $   24.00            140.00%           18.18%               14.91%
42,737.81......                 110%            $   25.40            154.00%           19.42%               15.92%
44,772.95......                 120%            $   26.80            168.00%           20.59%               16.90%
46,808.08......                 130%            $   28.20            182.00%           21.71%               17.83%
</TABLE>
 
- ------------------------
 
(1) The annualized rates of return specified in the preceding table are
    calculated on a semiannual bond equivalent basis.
 
(2) This rate of return assumes (i) an investment of a fixed amount in the
    stocks underlying the Index with the allocation of such amount reflecting
    the current relative weights of such stocks in the Index; (ii) a percentage
    change in the aggregate price of such stocks that equals the percentage
    change in the Index from the Starting Index Value to the relevant
    hypothetical Ending Index Value; (iii) a constant dividend yield of .75% per
    annum, paid quarterly from the date of initial delivery of Securities,
    applied to the value of the Index at the end of each such quarter assuming
    such value increases or decreases linearly from the Starting Index Value to
    the applicable hypothetical Ending Index Value; (iv) no transaction fees or
    expenses; (v) a term for the Securities from June 3, 1997 to June 14, 2002;
    and (vi) a final Index value equal to the Ending Index Value. The aggregate
    dividend yield of the stocks underlying the Index as of May 28, 1997 was
    approximately .75%.
 
(3) This is the Starting Index Value.
 
                                      S-12
<PAGE>
    The above figures are for purposes of illustration only. The actual
Supplemental Redemption Amount received by investors and the total and pretax
annualized rate of return resulting therefrom will depend entirely on the actual
Ending Index Value determined by the Calculation Agent as provided herein.
Historical data regarding the Index is included in this Prospectus Supplement
under "The Index-- Historical Data on the Index".
 
ADJUSTMENTS TO THE INDEX; MARKET DISRUPTION EVENTS
 
    If at any time the method of calculating the Index, or the value thereof, is
changed in any material respect, or if the Index is in any other way modified so
that such Index does not, in the opinion of the Calculation Agent, fairly
represent the value of the Index had such changes or modifications not been
made, then, from and after such time, the Calculation Agent shall, at the close
of business in New York, New York, on each date that the closing value with
respect to the Ending Index Value is to be calculated, make such adjustments as,
in the good faith judgment of the Calculation Agent, may be necessary in order
to arrive at a calculation of a value of a stock index comparable to the Index
as if such changes or modifications had not been made, and calculate such
closing value with reference to the Index, as adjusted. Accordingly, if the
method of calculating the Index is modified so that the value of such Index is a
fraction or a multiple of what it would have been if it had not been modified
(E.G., due to a split in the Index), then the Calculation Agent shall adjust
such Index in order to arrive at a value of the Index as if it had not been
modified (E.G., as if such split had not occurred).
 
    "Market Disruption Event" means either of the following events, as
determined by the Calculation Agent:
 
        (a) a suspension, material limitation or absence of trading on the TSE
    of 20% or more of the Underlying Stocks which then comprise the Index or a
    Successor Index during the one-half hour period preceding the close of
    trading on the applicable exchange; or
 
        (b) the suspension or material limitation on the Singapore International
    Monetary Exchange, Ltd. (the "SIMEX"), the Osaka Securities Exchange (the
    "OSE") or any other major futures or securities market from trading in
    futures or options contracts related to the Index or a Successor Index
    during the one-half hour period preceding the close of trading on the
    applicable exchange.
 
    For the purposes of determining whether a Market Disruption Event has
occurred: (i) a limitation on the hours or number of days of trading will not
constitute a Market Disruption Event if it results from an announced change in
the regular business hours of the relevant exchange, (ii) a decision to
permanently discontinue trading in the relevant futures or options contract will
not constitute a Market Disruption Event, (iii) a suspension in trading in a
futures or options contract on the Index by a major securities market by reason
of (a) a price change violating limits set by such securities market, (b) an
imbalance of orders relating to such contracts or (c) a disparity in bid and ask
quotes relating to such contracts will constitute a suspension or material
limitation of trading in futures or options contracts related to the Index, and,
(iv) an absence of trading on the TSE will not include any time when the TSE is
closed for trading under ordinary circumstances. Under certain circumstances,
the duties of MLPF&S as Calculation Agent in determining the existence of Market
Disruption Events could conflict with the interests of MLPF&S as an affiliate of
the issuer of the MITTS.
 
    Based on the information currently available to the Company, the opening of
trading on the OSE was delayed on January 17, 1995 because of the earthquake in
Kobe. If such delay had occurred during the one-half hour period preceding the
close of trading on the OSE, it would have constituted a Market Disruption
Event. In addition, because of movements in the price for futures contracts for
the Index, the OSE imposed price limits on such futures contracts on January 23,
1995 that were in effect during the one-half hour period preceding the close of
trading on the OSE and that would have constituted a Market Disruption Event. On
January 31 and February 1 of 1994, prices for futures contracts for the Nikkei
Stock Index 225 reached price limits imposed by the OSE, which would have been a
Market Disruption Event.
 
                                      S-13
<PAGE>
Other than the foregoing events, to the Company's knowledge no circumstances
have arisen since the inception of the Index that could have constituted a
Market Disruption Event. The existence or non-existence of such circumstances,
however, is not necessarily indicative of the likelihood of such circumstances
arising or not arising in the future.
 
DISCONTINUANCE OF THE INDEX
 
    If NKS discontinues publication of the Index and NKS or another entity
publishes a successor or substitute index that the Calculation Agent determines,
in its sole discretion, to be comparable to such Index (any such index being
referred to hereinafter as a "Successor Index"), then, upon the Calculation
Agent's notification of such determination to the Trustee and the Company, the
Calculation Agent will substitute the Successor Index as calculated by NKS or
such other entity for the Index and calculate the Ending Index Value as
described above under "Payment at Maturity". Upon any selection by the
Calculation Agent of a Successor Index, the Company shall cause notice thereof
to be given to Holders of the Securities.
 
    If NKS discontinues publication of the Index and a Successor Index is not
selected by the Calculation Agent or is no longer published on any of the
Calculation Days, the value to be substituted for the Index for any such
Calculation Day used to calculate the Supplemental Redemption Amount at maturity
will be a value computed by the Calculation Agent for each Calculation Day in
accordance with the procedures last used to calculate the Index prior to any
such discontinuance. If a Successor Index is selected or the Calculation Agent
calculates a value as a substitute for the Index as described below, such
Successor Index or value shall be substituted for the Index for all purposes,
including for purposes of determining whether a Market Disruption Event exists.
 
    If NKS discontinues publication of the Index prior to the period during
which the Supplemental Redemption Amount is to be determined and the Calculation
Agent determines that no Successor Index is available at such time, then on each
Business Day until the earlier to occur of (a) the determination of the Ending
Index Value and (b) a determination by the Calculation Agent that a Successor
Index is available, the Calculation Agent shall determine the value that would
be used in computing the Supplemental Redemption Amount as described in the
preceding paragraph as if such day were a Calculation Day. The Calculation Agent
will cause notice of each such value to be published not less often than once
each month in The Wall Street Journal (or another newspaper of general
circulation), and arrange for information with respect to such values to be made
available by telephone. Notwithstanding these alternative arrangements,
discontinuance of the publication of the Index may adversely affect trading in
the Securities.
 
EVENTS OF DEFAULT AND ACCELERATION
 
    In case an Event of Default with respect to any Securities shall have
occurred and be continuing, the amount payable to a beneficial owner of a
Security upon any acceleration permitted by the Securities, with respect to each
$10 principal amount thereof, will be equal to the principal amount and the
Supplemental Redemption Amount, if any, calculated as though the date of early
repayment were the stated maturity date of the Securities. See "Description of
Securities -- Payment at Maturity" in this Prospectus Supplement. If a
bankruptcy proceeding is commenced in respect of the Company, the claim of the
beneficial owner of a Security may be limited, under Section 502(b)(2) of Title
11 of the United States Code, to the principal amount of the Security plus an
additional amount of contingent interest calculated as though the date of the
commencement of the proceeding were the maturity date of the Securities.
 
    In case of default in payment at the maturity date of the Securities
(whether at their stated maturity or upon acceleration), from and after the
maturity date the Securities shall bear interest, payable upon demand of the
beneficial owners thereof, at the rate of 6.96% per annum (to the extent that
payment of such interest shall be legally enforceable) on the unpaid amount due
and payable on such date in
 
                                      S-14
<PAGE>
accordance with the terms of the Securities to the date payment of such amount
has been made or duly provided for.
 
DEPOSITORY
 
    Upon issuance, all Securities will be represented by one or more fully
registered global securities (the "Global Securities"). Each such Global
Security will be deposited with, or on behalf of, The Depository Trust Company
("DTC"), as Depository, registered in the name of DTC or a nominee thereof.
Unless and until it is exchanged in whole or in part for Securities in
definitive form, no Global Security may be transferred except as a whole by the
Depository to a nominee of such Depository or by a nominee of such Depository to
such Depository or another nominee of such Depository or by such Depository or
any such nominee to a successor of such Depository or a nominee of such
successor.
 
    DTC has advised the Company as follows: DTC is a limited-purpose trust
company organized under the Banking Law of the State of New York, a member of
the Federal Reserve System, a "clearing corporation" within the meaning of the
New York Uniform Commercial Code, and a "clearing agency" registered pursuant to
the provisions of Section 17A of the Securities Exchange Act of 1934, as
amended. DTC was created to hold securities of its participants ("Participants")
and to facilitate the clearance and settlement of securities transactions among
its Participants in such securities through electronic book-entry changes in
accounts of the Participants, thereby eliminating the need for physical movement
of securities certificates. DTC's Participants include securities brokers and
dealers, banks, trust companies, clearing corporations, and certain other
organizations.
 
    DTC is owned by a number of Participants and by the New York Stock Exchange,
Inc., the American Stock Exchange, Inc. and the National Association of
Securities Dealers, Inc. Access to the DTC book-entry system is also available
to others, such as banks, brokers, dealers and trust companies that clear
through or maintain a custodial relationship with a Participant, either directly
or indirectly ("Indirect Participants").
 
    Purchases of Securities must be made by or through Participants, which will
receive a credit on the records of DTC. The ownership interest of each actual
purchaser of each Security ("Beneficial Owner") is in turn to be recorded on the
Participants' or Indirect Participants' records. Beneficial Owners will not
receive written confirmation from DTC of their purchase, but Beneficial Owners
are expected to receive written confirmations providing details of the
transaction, as well as periodic statements of their holdings, from the
Participant or Indirect Participant through which the Beneficial Owner entered
into the transaction. Ownership of beneficial interests in such Global Security
will be shown on, and the transfer of such ownership interests will be effected
only through, records maintained by DTC (with respect to interests of
Participants) and on the records of Participants (with respect to interests of
persons held through Participants). The laws of some states may require that
certain purchasers of securities take physical delivery of such securities in
definitive form. Such limits and such laws may impair the ability to own,
transfer or pledge beneficial interests in Global Securities.
 
    SO LONG AS DTC, OR ITS NOMINEE, IS THE REGISTERED OWNER OF A GLOBAL
SECURITY, DTC OR ITS NOMINEE, AS THE CASE MAY BE, WILL BE CONSIDERED THE SOLE
OWNER OR HOLDER OF THE SECURITIES REPRESENTED BY SUCH GLOBAL SECURITY FOR ALL
PURPOSES UNDER THE 1983 INDENTURE. EXCEPT AS PROVIDED BELOW, BENEFICIAL OWNERS
IN A GLOBAL SECURITY WILL NOT BE ENTITLED TO HAVE THE SECURITIES REPRESENTED BY
SUCH GLOBAL SECURITIES REGISTERED IN THEIR NAMES, WILL NOT RECEIVE OR BE
ENTITLED TO RECEIVE PHYSICAL DELIVERY OF THE SECURITIES IN DEFINITIVE FORM AND
WILL NOT BE CONSIDERED THE OWNERS OR HOLDERS THEREOF UNDER THE 1983 INDENTURE,
INCLUDING FOR PURPOSES OF RECEIVING ANY REPORTS DELIVERED BY THE COMPANY OR THE
TRUSTEE PURSUANT TO THE 1983 INDENTURE. Accordingly, each Person owning a
beneficial interest in a Global Security must rely on the procedures of DTC and,
if such Person is not a Participant, on the procedures of the Participant
through which such Person owns its interest, to exercise any rights of a Holder
under the 1983 Indenture. The Company understands that under existing industry
practices, in the event that the Company requests any action of Holders or that
an owner of a beneficial
 
                                      S-15
<PAGE>
interest in such a Global Security desires to give or take any action which a
Holder is entitled to give or take under the 1983 Indenture, DTC would authorize
the Participants holding the relevant beneficial interests to give or take such
action, and such Participants would authorize Beneficial Owners owning through
such Participants to give or take such action or would otherwise act upon the
instructions of Beneficial Owners. Conveyance of notices and other
communications by DTC to Participants, by Participants to Indirect Participants,
and by Participants and Indirect Participants to Beneficial Owners will be
governed by arrangements among them, subject to any statutory or regulatory
requirements as may be in effect from time to time.
 
    Payment of the principal amount and any Supplemental Redemption Amount with
respect to the Securities registered in the name of DTC or its nominee will be
made to DTC or its nominee, as the case may be, as the Holder of the Global
Securities representing such Securities. None of the Company, the Trustee or any
other agent of the Company or agent of the Trustee will have any responsibility
or liability for any aspect of the records relating to or payments made on
account of beneficial ownership interests or for supervising or reviewing any
records relating to such beneficial ownership interests. The Company expects
that DTC, upon receipt of any payment of principal or any Supplemental
Redemption Amount in respect of a Global Security, will credit the accounts of
the Participants with payment in amounts proportionate to their respective
holdings in principal amount of beneficial interest in such Global Security as
shown on the records of DTC. The Company also expects that payments by
Participants to Beneficial Owners will be governed by standing customer
instructions and customary practices, as is now the case with securities held
for the accounts of customers in bearer form or registered in "street name", and
will be the responsibility of such Participants.
 
    If (x) any Depository is at any time unwilling or unable to continue as
Depository and a successor depository is not appointed by the Company within 60
days, (y) the Company executes and delivers to the Trustee a Company Order to
the effect that the Global Securities shall be exchangeable or (z) an Event of
Default has occurred and is continuing with respect to the Securities, the
Global Securities will be exchangeable for Securities in definitive form of like
tenor and of an equal aggregate principal amount, in denominations of $10 and
integral multiples thereof. Such definitive Securities shall be registered in
such name or names as the Depository shall instruct the Trustee. It is expected
that such instructions may be based upon directions received by the Depository
from Participants with respect to ownership of beneficial interests in such
Global Securities.
 
SAME-DAY SETTLEMENT AND PAYMENT
 
    Settlement for the Securities will be made by the underwriter in immediately
available funds. All payments of principal and the Supplemental Redemption
Amount, if any, will be made by the Company in immediately available funds so
long as the Securities are maintained in book-entry form.
 
                                      S-16
<PAGE>
                                   THE INDEX
 
    All disclosure contained in this Prospectus Supplement regarding the Index,
including, without limitation, its make-up, method of calculation and changes in
its components, is derived from publicly available information prepared by Nihon
Keizai Shimbun, Inc. ("NKS").
 
GENERAL
 
    Unless otherwise stated, all information herein relating to the Nikkei 225
Index has been derived from the Stock Market Indices Data Book published by NKS
and other publicly-available sources. Such information reflects the policies of
NKS as stated in such sources; such policies are subject to change at the
discretion of NKS.
 
    The Nikkei 225 Index is a stock index calculated, published and disseminated
by NKS that measures the composite price performance of selected Japanese
stocks. The Nikkei 225 Index is currently based on 225 Underlying Stocks trading
on the TSE and represents a broad cross-section of Japanese industry. All 225
Underlying Stocks are stocks listed in the First Section of the TSE. Stocks
listed in the First Section are among the most actively traded stocks on the
TSE. Futures and options contracts on the Nikkei 225 Index are traded on the
Singapore International Monetary Exchange Ltd., the Osaka Securities Exchange
and the Chicago Mercantile Exchange.
 
    The Nikkei 225 Index is a modified, price-weighted index (I.E., an
Underlying Stock's weight in the index is based on its price per share rather
than the total market capitalization of the issuer) which is calculated by (i)
multiplying the per share price of each Underlying Stock by the corresponding
weighting factor for such Underlying Stock (a "Weight Factor"), (ii) calculating
the sum of all these products and (iii) dividing such sum by a divisor. The
divisor, initially set in 1949 at 225, was 9.999 as of May 28, 1997, and is
subject to periodic adjustments as set forth below. Each Weight Factor is
computed by dividing Y50 by the par value of the relevant Underlying Stock, so
that the share price of each Underlying Stock when multiplied by its Weight
Factor corresponds to a share price based on a uniform par value of Y50. Each
Weight Factor represents the number of shares of the related Underlying Stock
which are included in one trading unit of the Nikkei 225 Index. The stock prices
used in the calculation of the Nikkei 225 Index are those reported by a primary
market for the Underlying Stocks (currently the TSE). The level of the Nikkei
225 Index is calculated once per minute during TSE trading hours.
 
    In order to maintain continuity in the level of the Nikkei 225 Index in the
event of certain changes due to non-market factors affecting the Underlying
Stocks, such as the addition or deletion of stocks, substitution of stocks,
stock dividends, stock splits or distributions of assets to stockholders, the
divisor used in calculating the Nikkei 225 Index is adjusted in a manner
designed to prevent any instantaneous change or discontinuity in the level of
the Nikkei 225 Index. Thereafter, the divisor remains at the new value until a
further adjustment is necessary as the result of another change. As a result of
each such change affecting any Underlying Stock, the divisor is adjusted in such
a way that the sum of all share prices immediately after such change multiplied
by the applicable Weight Factor and divided by the new divisor (I.E., the level
of the Nikkei 225 Index immediately after such change) will equal the level of
the Nikkei 225 Index immediately prior to the change.
 
    Underlying Stocks may be deleted or added by NKS. However, to maintain
continuity in the Nikkei 225 Index, the policy of NKS is generally not to alter
the composition of the Underlying Stocks except when an Underlying Stock is
deleted in accordance with the following criteria. Any stock becoming ineligible
for listing in the First Section of the TSE due to any of the following reasons
will be deleted from the Underlying Stocks: bankruptcy of the issuer; merger of
the issuer into, or acquisition of the issuer by, another company; delisting of
such stock or transfer of such stock to the "Seiri-Post" because of excess debt
of the issuer or because of any other reason; or transfer of such stock to the
Second Section of the TSE. Upon deletion of a stock from the Underlying Stocks,
NKS will select, in accordance with certain criteria established by it, a
replacement for such deleted Underlying Stock. In an exceptional case, a newly
 
                                      S-17
<PAGE>
listed stock in the First Section of the TSE that is recognized by NKS to be
representative of a market may be added to the Underlying Stocks. In such case,
an existing Underlying Stock with low trading volume and not representative of a
market will be deleted.
 
    NKS is under no obligation to continue the calculation and dissemination of
the Nikkei 225 Index. The MITTS are not sponsored, endorsed, sold or promoted by
NKS. No inference should be drawn from the information contained in this
Prospectus Supplement that NKS makes any representation or warranty, implied or
express, to the Company, the holders of the MITTS or any member of the public
regarding the advisability of investing in securities generally or in the MITTS
in particular or the ability of the Nikkei 225 Index to track general stock
market performance. NKS has no obligation to take the needs of the Company or
the holders of the MITTS into consideration in determining, composing or
calculating the Nikkei 225 Index. NKS is not responsible for, and has not
participated in the determination of the timing of, prices for, or quantities
of, the MITTS to be issued or in the determination or calculation of the
equation by which the MITTS are to be settled in cash. NKS has no obligation or
liability in connection with the administration, marketing or trading of the
MITTS.
 
    The use of and reference to the Nikkei 225 Index in connection with the
MITTS have been consented to by NKS, the publisher of the Nikkei 225 Index.
 
    None of the Company, the Calculation Agent and the Underwriter accepts any
responsibility for the calculation, maintenance or publication of the Nikkei 225
Index or any Successor Index. NKS disclaims all responsibility for any errors or
omissions in the calculation and dissemination of the Nikkei 225 Index or the
manner in which such Index is applied in determining any Starting or Ending
Index Values or any Supplemental Redemption Amount upon maturity of the MITTS.
 
THE TOKYO STOCK EXCHANGE
 
    The Tokyo Stock Exchange is one of the world's largest securities exchanges
in terms of market capitalization. The TSE market is a two-way, continuous pure
auction market. Trading hours are currently from 9:00 A.M. to 11:00 A.M. and
from 12:30 P.M. to 3:00 P.M., Tokyo time, Monday through Friday.
 
    Due to the time zone difference, on any normal trading day the TSE will
close prior to the opening of business in New York City on the same calendar
day. Therefore, the closing level of the Nikkei 225 Index on such trading day
will generally be available in the United States by the opening of business on
the same calendar day.
 
    The TSE has adopted certain measures, including daily price floors and
ceilings on individual stocks, intended to prevent any extreme short-term price
fluctuations resulting from order imbalances. In general, any stock listed on
the TSE cannot be traded at a price lower than the applicable price floor or
higher than the applicable price ceiling. Such price floors and ceilings are
expressed in absolute Japanese yen, rather than percentage, limits based on the
closing price of the stock on the previous trading day. In addition, when there
is a major order imbalance in a listed stock, the TSE posts a "special bid
quote" or a "special asked quote" for that stock at a specified higher or lower
price level than the stock's last sale price in order to solicit counter-orders
and balance supply and demand for the stock. Investors should also be aware that
the TSE may suspend the trading of individual stocks in certain limited and
extraordinary circumstances, including, for example, unusual trading activity in
that stock. As a result, changes in the Nikkei 225 Index may be limited by price
limitations or special quotes, or by suspension of trading, on individual stocks
which comprise the Nikkei 225 Index, which limitations may, in turn, adversely
affect the value of the MITTS.
 
HISTORICAL DATA ON THE INDEX
 
    The following table sets forth the closing values of the Index on the last
business day of each year from 1966 through 1996. The historical experience of
the Index should not be taken as an indication of future
 
                                      S-18
<PAGE>
performance and no assurance can be given that the value of the Index will not
decline and thereby reduce the Supplemental Redemption Amount which may be
payable to beneficial owners of Securities at maturity or otherwise.
 
                          YEAR END VALUE OF THE INDEX
 
<TABLE>
<CAPTION>
  YEAR     CLOSING VALUE    YEAR     CLOSING VALUE
- ---------  -------------  ---------  -------------
<S>        <C>            <C>        <C>
1966             1,452         1982        8,017
1967             1,281         1983        9,894
1968             1,715         1984       11,543
1969             2,359         1985       13,083
1970             1,987         1986       18,821
1971             2,714         1987       21,564
1972             5,208         1988       30,159
1973             4,307         1989       38,915
1974             3,817         1990       23,849
1975             4,359         1991       22,984
1976             4,987         1992       16,925
1977             4,866         1993       17,417
1978             6,002         1994       19,723
1979             6,570         1995       19,868
1980             7,063         1996       19,361
1981             7,682
</TABLE>
 
    The following table sets forth the level of the Index at the end of each
month, in the period from January, 1992 through April, 1997. These historical
data on the Index are not necessarily indicative of the future performance of
the Index or what the value of the Securities may be. Any historical upward or
downward trend in the level of the Index during any period set forth below is
not any indication that the Index is more or less likely to increase or decrease
at any time during the term of the Securities.
 
<TABLE>
<CAPTION>
                                                           1992       1993       1994       1995       1996       1997
                                                         ---------  ---------  ---------  ---------  ---------  ---------
<S>                                                      <C>        <C>        <C>        <C>        <C>        <C>
January................................................     22,023     17,024     20,229     18,650     20,813     18,330
February...............................................     21,339     16,953     19,997     17,053     20,125     18,557
March..................................................     19,346     18,591     19,112     16,140     21,407     18,003
April..................................................     17,391     20,919     19,725     16,807     22,041     19,151
May....................................................     18,348     20,552     20,974     15,437     21,956
June...................................................     15,952     19,590     20,644     14,517     22,531
July...................................................     15,910     20,380     20,449     16,678     20,693
August.................................................     18,061     21,027     20,629     18,117     20,167
September..............................................     17,399     20,106     19,564     17,913     21,556
October................................................     16,767     19,703     19,990     17,655     20,467
November...............................................     17,684     16,407     19,076     18,744     21,020
December...............................................     16,925     17,417     19,723     19,868     19,361
</TABLE>
 
                                      S-19
<PAGE>
    The following graph sets forth the closing value of the Index at the end of
each year from 1966 through 1996. Past movements of the Index are not
necessarily indicative of the future Index values. On May 28, 1997, the closing
level of the Index was 20,351.34.
 
[The graph sets forth the historical year-end-closing levels of the Index from
1966 through 1996, with the vertical axis specifying the year-end closing level
of the Index in a range from 0 to 40000 in increments of 5000 and the horizontal
axis specifying the time period in increments of one year from 1966 to 1996.]
 
                                      S-20
<PAGE>
            CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS
 
    Set forth in full below is the opinion of Brown & Wood LLP, counsel to the
Company, as to certain United States Federal income tax consequences of the
purchase, ownership and disposition of the Securities. Such opinion is based
upon laws, regulations, rulings and decisions now in effect, all of which are
subject to change (including retroactive changes in effective dates) or possible
differing interpretations. The discussion below deals only with Securities held
as capital assets and does not purport to deal with persons in special tax
situations, such as financial institutions, insurance companies, regulated
investment companies, dealers in securities or currencies, tax-exempt entities,
persons whose functional currency is not the United States dollar, or persons
holding Securities as a hedge against currency risks, as a position in a
"straddle" or as part of a "hedging" or "conversion" transaction for tax
purposes. It also does not deal with holders other than original purchasers
(except where otherwise specifically noted herein). The following discussion
also assumes that the issue price of the Securities, as determined for United
States Federal income tax purposes, equals the principal amount thereof. Persons
considering the purchase of the Securities should consult their own tax advisors
concerning the application of the United Stated Federal income tax laws to their
particular situations as well as any consequences of the purchase, ownership and
disposition of the Securities arising under the laws of any other taxing
jurisdiction.
 
    As used herein, the term "U.S. Holder" means a beneficial owner of a
Security that is for United States Federal income tax purposes (a) a citizen or
resident of the United States, (b) a corporation, partnership or other entity
created or organized in or under the laws of the United States or of any
political subdivision thereof, (c) an estate the income of which is subject to
United States Federal income taxation regardless of its source, (d) a trust if a
court within the United States is able to exercise primary supervision over the
administration of the trust and one or more United States fiduciaries have the
authority to control all substantial decisions of the trust, or (e) any other
person whose income or gain in respect of a Security is effectively connected
with the conduct of a United States trade or business. As used herein, the term
"non-U.S. Holder" means a beneficial owner of a Security that is not a U.S.
Holder.
 
GENERAL
 
    There are no statutory provisions, regulations, published rulings or
judicial decisions addressing or involving the characterization, for United
States Federal income tax purposes, of the Securities or securities with terms
substantially the same as the Securities. However, although the matter is not
free from doubt, under current law, each Security should be treated as a debt
instrument of the Company for United States Federal income tax purposes. The
Company currently intends to treat each Security as a debt instrument of the
Company for United States Federal income tax purposes and, where required,
intends to file information returns with the Internal Revenue Service ("IRS") in
accordance with such treatment, in the absence of any change or clarification in
the law, by regulation or otherwise, requiring a different characterization of
the Securities. Prospective investors in the Securities should be aware,
however, that the IRS is not bound by the Company's characterization of the
Securities as indebtedness and the IRS could possibly take a different position
as to the proper characterization of the Securities for United States Federal
income tax purposes. The following discussion of the principal United States
Federal income tax consequences of the purchase, ownership and disposition of
the Securities is based upon the assumption that each Security will be treated
as a debt instrument of the Company for United States Federal income tax
purposes. If the Securities are not in fact treated as debt instruments of the
Company for United States Federal income tax purposes, then the United States
Federal income tax treatment of the purchase, ownership and disposition of the
Securities could differ from the treatment discussed below with the result that
the timing and character of income, gain or loss recognized in respect of a
Security could differ from the timing and character of income, gain or loss
recognized in respect of a Security had the Securities in fact been treated as
debt instruments of the Company for United States Federal income tax purposes.
 
                                      S-21
<PAGE>
U.S. HOLDERS
 
    On June 11, 1996, the Treasury Department issued final regulations (the
"Final Regulations") concerning the proper United States Federal income tax
treatment of contingent payment debt instruments such as the Securities, which
apply to debt instruments issued on or after August 13, 1996 and, accordingly,
will apply to the Securities. In general, the Final Regulations cause the timing
and character of income, gain or loss reported on a contingent payment debt
instrument to substantially differ from the timing and character of income, gain
or loss reported on a contingent payment debt instrument under general
principles of prior United States Federal income tax law. Specifically, the
Final Regulations generally require a U.S. Holder of such an instrument to
include future contingent and noncontingent interest payments in income as such
interest accrues based upon a projected payment schedule. Moreover, in general,
under the Final Regulations, any gain recognized by a U.S. Holder on the sale,
exchange, or retirement of a contingent payment debt instrument is treated as
ordinary income and all or a portion of any loss realized could be treated as
ordinary loss as opposed to capital loss (depending upon the circumstances). The
Final Regulations provide no definitive guidance as to whether or not an
instrument is properly characterized as a debt instrument for United States
Federal income tax purposes.
 
    In particular, solely for purposes of applying the Final Regulations to the
Securities, the Company has determined that the projected payment schedule for
the Securities will consist of payment on the maturity date of a projected
Supplemental Redemption Amount equal to $4.1078 per Unit (the "Projected
Supplemental Redemption Amount"). This represents an estimated yield on the
Securities equal to 6.96% per annum (compounded semiannually). Accordingly,
during the term of the Securities, a U.S. Holder of a Security will be required
to include in income as ordinary interest an amount equal to the sum of the
daily portions of interest on the Security that are deemed to accrue at this
estimated yield for each day during the taxable year (or portion of the taxable
year) on which the U.S. Holder holds such Security. The amount of interest that
will be deemed to accrue in any accrual period (I.E., generally each six month
period during which the Securities are outstanding) will equal the product of
this estimated yield (properly adjusted for the length of the accrual period)
and the Security's adjusted issue price (as defined below) at the beginning of
the accrual period. The daily portions of interest will be determined by
allocating to each day in the accrual period the ratable portion of the interest
that is deemed to accrue during the accrual period. In general, for these
purposes, a Security's adjusted issue price will equal the Security's issue
price (I.E., $10), increased by the interest previously accrued on the Security.
At maturity of a Security, in the event that the actual Supplemental Redemption
Amount, if any, exceeds $4.1078 per Unit (I.E., the Projected Supplemental
Redemption Amount), a U.S. Holder will be required to include the excess of the
actual Supplemental Redemption Amount over $4.1078 per Unit (I.E., the Projected
Supplemental Redemption Amount) in income as ordinary interest on the maturity
date. Alternatively, in the event that the actual Supplemental Redemption
Amount, if any, is less than $4.1078 per Unit (I.E., the Projected Supplemental
Redemption Amount), the excess of $4.1078 per Unit (I.E., the Projected
Supplemental Redemption Amount), over the actual Supplemental Redemption Amount
will be treated first as an offset to any interest otherwise includible in
income by the U.S. Holder with respect to the Security for the taxable year in
which the maturity date occurs to the extent of the amount of such includible
interest. A U.S. Holder will be permitted to recognize and deduct, as an
ordinary loss that is not subject to the limitations applicable to miscellaneous
itemized deductions, any remaining portion of the excess of $4.1078 per Unit
(I.E., the Projected Supplemental Redemption Amount) over the actual
Supplemental Redemption Amount that is not treated as an interest offset
pursuant to the foregoing rules.
 
    Upon the sale or exchange of a Security prior to the maturity date, a U.S.
Holder will be required to recognize taxable gain or loss in an amount equal to
the difference, if any, between the amount realized by the U.S. Holder upon such
sale or exchange and the U.S. Holder's adjusted tax basis in the Security as of
the date of disposition. A U.S. Holder's adjusted tax basis in a Security
generally will equal such U.S. Holder's initial investment in the Security
increased by any interest previously included in income with respect to the
Security by the U.S. Holder. Any such taxable gain will be treated as ordinary
income. Any
 
                                      S-22
<PAGE>
such taxable loss will be treated as ordinary loss to the extent of the U.S.
Holder's total interest inclusions on the Security. Any remaining loss generally
will be treated as long-term or short-term capital loss (depending upon the U.S.
Holder's holding period for the Security). All amounts includible in income by a
U.S. Holder as ordinary interest pursuant to the Final Regulations will be
treated as original issue discount.
 
    Prospective investors in the Securities should be aware that if a
significant percentage of the total aggregate amount of the Securities
originally issued is sold at a discount from the principal amount thereof, which
is not expected to be the case, then the issue price of the Securities, as
determined for United States Federal income tax purposes, may be less than the
principal amount of the Securities. In such event, if a U.S. Holder purchases a
Security in connection with the original issuance thereof for an amount equal to
the principal amount thereof, the amount of the difference between the principal
amount of the Securities and the issue price thereof generally should be
allocated by the U.S. Holder to daily portions of interest that are deemed to
accrue on each such date as an offset to such interest on each such date. In
addition, on each such date, the U.S. Holder's adjusted tax basis in the
Security will be reduced by the amount treated as an interest offset pursuant to
the foregoing rule. Alternatively, in the event that the issue price of the
Securities, as determined for United States Federal income tax purposes, equals
the principal amount thereof and a U.S. Holder purchases a Security in
connection with the original issuance thereof for an amount that is less than
the principal amount thereof, the amount of the difference between the principal
amount of the Security and the amount paid by the U.S. Holder to purchase the
Security generally should be allocated by the U.S. Holder to daily portions of
interest that are deemed to accrue on each such date as additional ordinary
interest includible in income by the U.S. Holder on each such date. In such
event, on each such date, the U.S. Holder's adjusted tax basis in the Security
will be increased by the amount treated as additional ordinary interest income.
In addition, U.S. Holders purchasing a Security at a price that differs from the
adjusted issue price of the Security as of the purchase date (E.G., subsequent
purchasers) will be subject to special rules providing for certain adjustments
to the foregoing rules and such U.S. Holders should consult their own tax
advisors concerning these rules. Moreover, all prospective investors in the
Securities should consult their own tax advisors concerning the application of
the Final Regulations to their investment in the Securities. Investors in the
Securities may also obtain the projected payment schedule, as determined by the
Company for purposes of the application of the Final Regulations to the
Securities, by submitting a written request for such information to Merrill
Lynch & Co., Inc., Attn: Darryl W. Colletti, Corporate Secretary's Office,
Merrill Lynch & Co., Inc., 100 Church Street, 12th Floor, New York, New York
10080-6512.
 
    The projected payment schedule (including both the Projected Supplemental
Redemption Amount and the estimated yield on the Securities) has been determined
solely for United States Federal income tax purposes (I.E., for purposes of
applying the Final Regulations to the Securities), and is neither a prediction
nor a guarantee of what the actual Supplemental Redemption Amount will be, or
that the actual Supplemental Redemption Amount will even exceed zero.
 
    The following table sets forth the amount of interest that will be deemed to
have accrued with respect to each Unit of the Securities during each accrual
period over the term of the Securities based upon the
 
                                      S-23
<PAGE>
projected payment schedule for the Securities as determined by the Company for
purposes of application of the Final Regulations to the Securities:
 
<TABLE>
<CAPTION>
                                                                                                        TOTAL
                                                                                                      INTEREST
                                                                                                      DEEMED TO
                                                                                                    HAVE ACCRUED
                                                                                  INTEREST DEEMED   ON SECURITIES
                                                                                        TO          AS OF END OF
                                                                                   ACCRUE DURING       ACCRUAL
                                                                                  ACCRUAL PERIOD       PERIOD
ACCRUAL PERIOD                                                                      (PER UNIT)       (PER UNIT)
- -------------------------------------------------------------------------------  -----------------  -------------
<S>                                                                              <C>                <C>
June 3, 1997 through June 14, 1997.............................................      $  0.0206        $  0.0206
June 15, 1997 through December 14, 1997........................................      $  0.3506        $  0.3712
December 15, 1997 through June 14, 1998........................................      $  0.3590        $  0.7302
June 15, 1998 through December 14, 1998........................................      $  0.3734        $  1.1036
December 15, 1998 through June 14, 1999........................................      $  0.3864        $  1.4900
June 15, 1999 through December 14, 1999........................................      $  0.3999        $  1.8899
December 15, 1999 through June 14, 2000........................................      $  0.4138        $  2.3037
June 15, 2000 through December 14, 2000........................................      $  0.4281        $  2.7318
December 15, 2000 through June 14, 2001........................................      $  0.4431        $  3.1749
June 15, 2001 through December 14, 2001........................................      $  0.4585        $  3.6334
December 15, 2001 through June 14, 2002........................................      $  0.4744        $  4.1078
</TABLE>
 
- ------------------------
 
Projected Supplemental Redemption Amount = $4.1078 per Unit.
 
NON-U.S. HOLDERS
 
    A non-U.S. Holder will not be subject to United States Federal income taxes
on payments of principal, premium (if any) or interest (including original issue
discount, if any) on a Security, unless such non-U.S. Holder is a direct or
indirect 10% or greater shareholder of the Company, a controlled foreign
corporation related to the Company or a bank receiving interest described in
section 881(c)(3)(A) of the Internal Revenue Code of 1986, as amended. However,
income allocable to non-U.S. Holders will generally be subject to annual tax
reporting on IRS Form 1042S. For a non-U.S. Holder to qualify for the exemption
from taxation, the last United States payor in the chain of payment prior to
payment to a non-U.S. Holder (the "Withholding Agent") must have received in the
year in which a payment of interest or principal occurs, or in either of the two
preceding calendar years, a statement that (a) is signed by the beneficial owner
of the Security under penalties of perjury, (b) certifies that such owner is not
a U.S. Holder and (c) provides the name and address of the beneficial owner. The
statement may be made on an IRS Form W-8 or a substantially similar form, and
the beneficial owner must inform the Withholding Agent of any change in the
information on the statement within 30 days of such change. If a Security is
held through a securities clearing organization or certain other financial
institutions, the organization or institution may provide a signed statement to
the Withholding Agent. However, in such case, the signed statement must be
accompanied by a copy of the IRS Form W-8 or the substitute form provided by the
beneficial owner to the organization or institution. The Treasury Department is
considering implementation of further certification requirements.
 
    Under current law, a Security will not be includible in the estate of a
non-U.S. Holder unless the individual is a direct or indirect 10% or greater
shareholder of the Company or, at the time of such individual's death, payments
in respect of such Security would have been effectively connected with the
conduct by such individual of a trade or business in the United States.
 
BACKUP WITHHOLDING
 
    Backup withholding of United States Federal income tax at a rate of 31% may
apply to payments made in respect of the Securities to registered owners who are
not "exempt recipients" and who fail to
 
                                      S-24
<PAGE>
provide certain identifying information (such as the registered owner's taxpayer
identification number) in the required manner. Generally, individuals are not
exempt recipients, whereas corporations and certain other entities generally are
exempt recipients. Payments made in respect of the Securities to a U.S. Holder
must be reported to the IRS, unless the U.S. Holder is an exempt recipient or
establishes an exemption. Compliance with the identification procedures
described in the preceding section would establish an exemption from backup
withholding for those non-U.S. Holders who are not exempt recipients.
 
    In addition, upon the sale of a Security to (or through) a broker, the
broker must withhold 31% of the entire purchase price, unless either (a) the
broker determines that the seller is a corporation or other exempt recipient or
(b) the seller provides, in the required manner, certain identifying information
and, in the case of a non-U.S. Holder, certifies that such seller is a non-U.S.
Holder (and certain other conditions are met). Such a sale must also be reported
by the broker to the IRS, unless either (a) the broker determines that the
seller is an exempt recipient or (b) the seller certifies its non-U.S. status
(and certain other conditions are met). Certification of the registered owner's
non-U.S. status would be made normally on an IRS Form W-8 under penalties of
perjury, although in certain cases it may be possible to submit other
documentary evidence.
 
    Any amounts withheld under the backup withholding rules from a payment to a
beneficial owner would be allowed as a refund or a credit against such
beneficial owner's United States Federal income tax provided the required
information is furnished to the IRS.
 
                                USE OF PROCEEDS
 
    The net proceeds from the sale of the Securities will be used as described
under "Use of Proceeds" in the attached Prospectus and to hedge market risks of
the Company associated with its obligation to pay the Supplemental Redemption
Amount.
 
                                  UNDERWRITING
 
    Merrill Lynch, Pierce, Fenner & Smith Incorporated (the "Underwriter") has
agreed, subject to the terms and conditions of the Underwriting Agreement and a
Terms Agreement, to purchase from the Company $255,000,000 aggregate principal
amount of Securities. The Underwriting Agreement provides that the obligations
of the Underwriter are subject to certain conditions precedent and that the
Underwriter will be obligated to purchase all of the Securities if any are
purchased.
 
    The Underwriter has advised the Company that it proposes initially to offer
all or part of the Securities directly to the public at the offering prices set
forth on the cover page of this Prospectus Supplement. After the initial public
offering, the public offering price may be changed. The Underwriter is offering
the Securities subject to receipt and acceptance and subject to the
Underwriter's right to reject any order in whole or in part.
 
    The underwriting of the Securities will conform to the requirements set
forth in the applicable sections of Rule 2720 of the Conduct Rules of the
National Association of Securities Dealers, Inc.
 
    The Underwriter is permitted to engage in certain transactions that
stabilize the price of the Securities. Such transactions consist of bids or
purchases for the purpose of pegging, fixing or maintaining the price of the
Securities.
 
    If the Underwriter creates a short position in the Securities in connection
with the offering, I.E., if they sell more Units of the Securities than are set
forth on the cover page of this Prospectus Supplement, the Underwriter may
reduce that short position by purchasing Units of the Securities in the open
market.
 
    The Underwriter may also impose a penalty bid on certain selling group
members. This means that if the Underwriter purchases Units of the Securities in
the open market to reduce the Underwriter's short
 
                                      S-25
<PAGE>
position or to stabilize the price of the Securities, they may reclaim the
amount of the selling concession from the selling group members who sold those
Units as part of the offering.
 
    In general, purchases of a security for the purpose of stabilization or to
reduce a short position could cause the price of the security to be higher than
it might be in the absence of such purchases. The imposition of a penalty bid
might also have an effect on the price of a security to the extent that it were
to discourage resales of the security.
 
    Neither the Company nor the Underwriter makes any representation or
prediction as to the direction or magnitude of any effect that the transactions
described above may have on the price of the Securities. In addition, neither
the Company nor the Underwriter makes any representation that the Underwriter
will engage in such transactions or that such transactions, once commenced, will
not be discontinued without notice.
 
    The Underwriter may use this Prospectus Supplement and the accompanying
Prospectus for offers and sales related to market-making transactions in the
Securities. The Underwriter may act as principal or agent in these transactions,
and the sales will be made at prices related to prevailing market prices at the
time of sale.
 
                             VALIDITY OF SECURITIES
 
    The validity of the Securities will be passed upon for the Company and for
the Underwriter by Brown & Wood LLP, New York, New York.
 
                                      S-26
<PAGE>
                             INDEX OF DEFINED TERMS
 
<TABLE>
<S>                                                                                    <C>
1983 Indenture.......................................................................  S-11
Beneficial Owner.....................................................................  S-15
Calculation Agent....................................................................  S-6
Calculation Day......................................................................  S-11
Calculation Period...................................................................  S-11
Company..............................................................................  S-4
DTC..................................................................................  S-4
Ending Index Value...................................................................  S-4
Final Regulations....................................................................  S-22
Global Securities....................................................................  S-15
Index................................................................................  S-4
Index Business Day...................................................................  S-11
Indirect Participants................................................................  S-15
IRS..................................................................................  S-21
Market Disruption Event..............................................................  S-13
MITTS................................................................................  S-1
MLPF&S...............................................................................  S-6
Nikkei 225 Index.....................................................................  S-4
NKS..................................................................................  S-5
Non-U.S. Holder......................................................................  S-24
OSE..................................................................................  S-13
Participants.........................................................................  S-15
Participation Rate...................................................................  S-4
Pricing Date.........................................................................  S-4
Projected Supplemental Redemption Amount.............................................  S-22
SEC..................................................................................  S-1
Securities...........................................................................  S-11
SIMEX................................................................................  S-13
Starting Index Value.................................................................  S-4
Successor Index......................................................................  S-14
Supplemental Redemption Amount.......................................................  S-4
TSE..................................................................................  S-6
Underwriter..........................................................................  S-25
Unit.................................................................................  S-4
U.S. Holder..........................................................................  S-21
Weight Factor........................................................................  S-17
Withholding Agent....................................................................  S-24
</TABLE>
 
                                      S-27
<PAGE>
PROSPECTUS
 
                                     [LOGO]
                           MERRILL LYNCH & CO., INC.
                          DEBT SECURITIES AND WARRANTS
 
    Merrill Lynch & Co., Inc. (the "Company") intends to sell from time to time
up to $3,429,572,580 aggregate principal amount (or net proceeds in the case of
warrants and in the case of securities issued at an original issue discount), or
its equivalent in such foreign currencies or units of two or more currencies,
based on the applicable exchange rate at the time of offering, as shall be
designated by the Company at the time of offering, of its senior debt securities
("Senior Debt Securities"), subordinated debt securities ("Subordinated Debt
Securities" and, together with the Senior Debt Securities, the "Debt
Securities"), warrants to purchase Debt Securities ("Debt Warrants"), warrants
entitling the holders thereof to receive from the Company a payment or delivery
determined by reference to decreases or increases in the level of an index or
portfolio based on one or more equity or debt securities (including the price or
yield of such securities), any statistical measure of economic or financial
performance (including any consumer price, currency or mortgage index) or the
price or value of any commodity or a combination thereof (the "Index Warrants")
and warrants to receive from the Company the cash value in U.S. dollars of the
right to purchase ("Currency Call Warrants") or to sell ("Currency Put Warrants"
and, together with the Currency Call Warrants, the "Currency Warrants") such
foreign currencies or units of two or more currencies as shall be designated by
the Company at the time of offering. The Debt Securities, Debt Warrants, Index
Warrants and Currency Warrants, which are collectively called the "Securities",
may be offered either jointly or separately and will be offered to the public on
terms determined by market conditions at the time of sale and set forth in a
prospectus supplement.
 
    The Securities will be unsecured and, except in the case of Subordinated
Debt Securities, will rank equally with all other unsecured and unsubordinated
indebtedness of the Company. The Subordinated Debt Securities will be
subordinated to all existing and future Senior Indebtedness of the Company.
 
    Each issue of Securities may vary, where applicable, as to aggregate
principal amount, maturity date, public offering or purchase price, interest
rate or rates, if any, and timing of payments thereof, provision for redemption,
sinking fund requirements, if any, exercise provisions, currencies of
denomination or currencies otherwise applicable thereto, the option of the
Company to satisfy its obligations upon maturity or any redemption or required
repurchase or in connection with any exchange provisions by delivering
securities (whether or not issued by, or the obligations of, the Company) or a
combination of cash, other securities and/or property and any other variable
terms and method of distribution. The accompanying Prospectus Supplement (the
"Prospectus Supplement") sets forth the specific terms with regard to the
Securities in respect of which this Prospectus is being delivered. The Company
may elect to deliver to purchasers of Securities an abbreviated term sheet
setting forth a description of the Securities being offered, or a summary
thereof (a "Terms Sheet"), instead of a Prospectus Supplement. This Prospectus
may be delivered prior to or concurrently with a Terms Sheet.
 
                             ---------------------
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
     EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
        SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
             COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF
                THIS PROSPECTUS. ANY REPRESENTATION TO THE
                      CONTRARY IS A CRIMINAL OFFENSE.
 
                              -------------------
 
    The Securities may be sold through Merrill Lynch & Co., Merrill Lynch,
Pierce, Fenner & Smith Incorporated ("MLPF&S") as agent or may be offered and
reoffered through, or through underwriting syndicates managed or co-managed by,
one or more underwriters, including MLPF&S, or directly to purchasers by the
Company. The Securities may not be sold without delivery of a Prospectus
Supplement describing such issue of Securities, the method and terms of offering
thereof or of a Terms Sheet, the names of any agents or underwriters and any
applicable commissions or discounts.
 
                             ---------------------
 
                  The date of this Prospectus is May 28, 1997.
<PAGE>
                             AVAILABLE INFORMATION
 
    The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance
therewith files reports and other information with the Securities and Exchange
Commission (the "Commission"). Reports, proxy and information statements and
other information filed by the Company can be inspected and copied at the public
reference facilities maintained by the Commission at Room 1024, 450 Fifth
Street, N.W., Washington, D.C. 20549, and at the following Regional Offices of
the Commission: Midwest Regional Office, 500 West Madison Street, Suite 1400,
Chicago, Illinois 60661-2511 and Northeast Regional Office, Seven World Trade
Center, New York, New York 10048. Copies of such material can be obtained from
the Public Reference Section of the Commission at 450 Fifth Street, N.W.,
Washington, D.C. 20549 at prescribed rates. Reports, proxy and information
statements and other information concerning the Company may also be inspected at
the offices of the New York Stock Exchange, the American Stock Exchange, the
Chicago Stock Exchange and the Pacific Exchange. The Commission maintains a Web
site at http://www.sec.gov containing reports, proxy and information statements
and other information regarding registrants, including the Company, that file
electronically with the Commission.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
    The Company's Annual Report on Form 10-K for the year ended December 27,
1996, Quarterly Report on Form 10-Q for the period ended March 28, 1997, and
Current Reports on Form 8-K dated January 13, 1997, January 27, 1997, February
25, 1997, March 14, 1997, April 15, 1997 and May 2, 1997 filed pursuant to
Section 13 of the Exchange Act, are hereby incorporated by reference into this
Prospectus.
 
    All documents filed by the Company pursuant to Section 13(a), 13(c), 14 or
15(d) of the Exchange Act subsequent to the date hereof and prior to the
termination of the offering of the Securities shall be deemed to be incorporated
by reference into this Prospectus and to be a part hereof from the date of
filing of such documents. Any statement contained in a document incorporated or
deemed to be incorporated by reference herein shall be deemed to be modified or
superseded for purposes of this Prospectus to the extent that a statement
contained herein or in any other subsequently filed document which also is or is
deemed to be incorporated by reference herein modifies or supersedes such
statement. Any such statement so modified or superseded shall not be deemed,
except as so modified or superseded, to constitute a part of this Prospectus.
 
    THE COMPANY WILL PROVIDE WITHOUT CHARGE TO EACH PERSON TO WHOM THIS
PROSPECTUS IS DELIVERED, ON WRITTEN OR ORAL REQUEST OF SUCH PERSON, A COPY
(WITHOUT EXHIBITS OTHER THAN EXHIBITS SPECIFICALLY INCORPORATED BY REFERENCE) OF
ANY OR ALL DOCUMENTS INCORPORATED BY REFERENCE INTO THIS PROSPECTUS. REQUESTS
FOR SUCH COPIES SHOULD BE DIRECTED TO LAWRENCE M. EGAN, JR., CORPORATE
SECRETARY'S OFFICE, MERRILL LYNCH & CO., INC., 100 CHURCH STREET, 12TH FLOOR,
NEW YORK, NEW YORK 10080-6512; TELEPHONE NUMBER (212) 602-8435.
 
                                       2
<PAGE>
                           MERRILL LYNCH & CO., INC.
 
    Merrill Lynch & Co., Inc. is a holding company that, through its
subsidiaries and affiliates, provides investment, financing, insurance, and
related services on a global basis. Its principal subsidiary, MLPF&S, one of the
largest securities firms in the world, is a leading broker in securities,
options contracts, and commodity and financial futures contracts; a leading
dealer in options and in corporate and municipal securities; a leading
investment banking firm that provides advice to, and raises capital for, its
clients; and an underwriter of selected insurance products. Other subsidiaries
provide financial services on a global basis similar to those of MLPF&S and are
engaged in such other activities as international banking, lending, and
providing other investment and financing services. Merrill Lynch International
Incorporated, through subsidiaries and affiliates, provides investment,
financing, and related services outside the United States and Canada. Merrill
Lynch Asset Management, LP and Fund Asset Management, LP together constitute one
of the largest mutual fund managers in the world and provide investment advisory
services. Merrill Lynch Government Securities Inc. is a primary dealer in
obligations issued or guaranteed by the U.S. Government and its agencies.
Merrill Lynch Capital Services, Inc., Merrill Lynch Derivative Products AG, and
Merrill Lynch Capital Markets PLC are the Company's primary derivative product
dealers and enter into interest rate and currency swaps and other derivative
transactions as intermediaries and as principals. The Company's insurance
underwriting operations consist of the underwriting of life insurance and
annuity products. Banking, trust, and mortgage lending operations conducted
through subsidiaries of the Company include issuing certificates of deposit,
offering money market deposit accounts, making secured loans, and providing
foreign exchange facilities and other related services.
 
    The principal executive office of the Company is located at World Financial
Center, North Tower, 250 Vesey Street, New York, New York 10281; its telephone
number is (212) 449-1000.
 
                                USE OF PROCEEDS
 
    The Company intends to use the net proceeds from the sale of the Securities
for general corporate purposes. Such uses may include the funding of investments
in, or extensions of credit to, its subsidiaries, the funding of assets held by
the Company or its subsidiaries, including securities inventories, customer
receivables and loans (including business loans, home equity loans and loans in
connection with investment banking-related merger and acquisition activities)
and the lengthening of the average maturity of the Company's borrowings
(including the refunding of maturing indebtedness). The precise amount and
timing of investments in, and extensions of credit to, its subsidiaries will
depend upon their funding requirements and the availability of other funds to
the Company and its subsidiaries. Pending such applications, the net proceeds
will be temporarily invested or applied to the reduction of short-term
indebtedness. A substantial portion of the proceeds from the sale of any
Currency Warrants or Index Warrants may be used to hedge market risks with
respect to such Warrants. Management of the Company expects that it will, on a
recurrent basis, engage in additional financings as the need arises to finance
the growth of the Company or to lengthen the average maturity of its borrowings.
To the extent that Securities being purchased for resale by MLPF&S are not
resold, the aggregate proceeds to the Company and its subsidiaries would be
reduced.
 
                                       3
<PAGE>
                         DESCRIPTION OF DEBT SECURITIES
 
    Unless otherwise specified in a Prospectus Supplement, the Senior Debt
Securities are to be issued under an indenture (the "1983 Indenture"), dated as
of April 1, 1983, as amended and restated, between the Company and The Chase
Manhattan Bank, formerly known as Chemical Bank (successor by merger to
Manufacturers Hanover Trust Company), as trustee or issued under an indenture
(the "1993 Indenture"), dated as of October 1, 1993, between the Company and The
Chase Manhattan Bank (successor by merger to The Chase Manhattan Bank, N.A.), as
trustee (each, a "Senior Debt Trustee"). The 1983 Indenture and the 1993
Indenture are referred to herein as the "Senior Indentures". The Subordinated
Debt Securities are to be issued under an indenture (the "Subordinated
Indenture"), between the Company and The Chase Manhattan Bank, formerly known as
Chemical Bank, as trustee (the "Subordinated Debt Trustee"). The Senior Debt
Securities and Subordinated Debt Securities may also be issued under one or more
other indentures (each, a "Subsequent Indenture") and have one or more other
trustees (each, a "Subsequent Trustee"). Any Subsequent Indenture relating to
Senior Debt Securities will have terms and conditions identical in all material
respects to the above-referenced Senior Indentures and any Subsequent Indenture
relating to Subordinated Debt Securities will have terms and conditions
identical in all material respects to the above-referenced Subordinated
Indenture, including, but not limited to, the applicable terms and conditions
described below. Any Subsequent Indenture relating to a series of Debt
Securities, and the trustee with respect thereto, will be identified in the
applicable Prospectus Supplement. The Senior Indentures, the Subordinated
Indenture and any Subsequent Indentures (whether senior or subordinated) are
referred to herein as the "Indentures"; and the Senior Debt Trustees, the
Subordinated Debt Trustee and any Subsequent Trustees are referred to herein as
the "Trustees". A copy of each Indenture is filed (or, in the case of a
Subsequent Indenture, will be filed) as an exhibit to the registration
statements relating to the Securities (collectively, the "Registration
Statement"). The following summaries of certain provisions of the Indentures do
not purport to be complete and are subject to, and are qualified in their
entirety by reference to, all provisions of the respective Indentures, including
the definitions therein of certain terms.
 
GENERAL
 
    Each Indenture provides that Debt Securities (Senior Debt Securities in the
case of the Senior Indentures or a Subsequent Indenture for Senior Debt
Securities, and Subordinated Debt Securities in the case of the Subordinated
Indenture or a Subsequent Indenture for Subordinated Debt Securities) may be
issued thereunder, without limitation as to aggregate principal amount, in one
or more series, by the Company from time to time upon satisfaction of certain
conditions precedent, including the delivery by the Company to the applicable
Trustee of a resolution of the Board of Directors, or the Executive Committee
thereof, of the Company which fixes or provides for the establishment of terms
of such Debt Securities, including: (1) the aggregate principal amount of such
Debt Securities and whether there is any limit upon the aggregate principal
amount of such Debt Securities that may be subsequently issued; (2) the date on
which such Debt Securities will mature; (3) the principal amount payable with
respect to such Debt Securities whether at maturity or upon earlier
acceleration, and whether such principal amount will be determined with
reference to an index, formula or other method; (4) the rate or rates per annum
(which may be fixed or variable) at which such Debt Securities will bear
interest, if any; (5) the dates on which such interest, if any, will be payable;
(6) the provisions for redemption of such Debt Securities, if any, the
redemption price and any remarketing arrangements relating thereto; (7) the
sinking fund requirements, if any, with respect to such Debt Securities; (8)
whether such Debt Securities are denominated or provide for payment in United
States dollars or a foreign currency or units of two or more of such foreign
currencies; (9) the form (registered or bearer or both) in which such Debt
Securities may be issued and any restrictions applicable to the exchange of one
form for another and to the offer, sale and delivery of such Debt Securities in
either form; (10) whether and under what circumstances the Company will pay
additional amounts ("Additional Amounts") in respect of such Debt Securities
held by a person who is not a U.S. person (as defined in the Prospectus
Supplement, as applicable) in respect of specified taxes, assessments or other
governmental charges and whether the Company has the option to redeem the
 
                                       4
<PAGE>
affected Debt Securities rather than pay such Additional Amounts; (11) whether
such Debt Securities are to be issued in global form; (12) the title of the Debt
Securities and the series of which such Debt Securities shall be a part; (13)
the denominations of such Debt Securities and (14) whether, and the terms and
conditions relating to when, the Company may satisfy certain of its obligations
with respect to such Debt Securities with regard to payment upon maturity, or
any redemption or required repurchase or in connection with any exchange
provisions by delivering to the Holders thereof securities (whether or not
issued by, or the obligation of, the Company) or a combination of cash, other
securities and/or property. Reference is made to the Prospectus Supplement for
the terms of the Debt Securities being offered thereby, including whether such
Debt Securities are Senior Debt Securities or Subordinated Debt Securities. The
Company may elect to deliver to purchasers of Securities a Terms Sheet instead
of a Prospectus. This Prospectus may be delivered prior to or concurrently with
a Terms Sheet. Debt Securities may also be issued under the Indentures upon the
exercise of Debt Warrants. See "Description of Debt Warrants". Nothing in the
Indentures or in the terms of the Debt Securities will prohibit the issuance of
securities representing subordinated indebtedness that is senior or junior to
the Subordinated Debt Securities.
 
    The Debt Securities will be issued, to the extent provided in the Prospectus
Supplement, in fully registered form without coupons, and/or in bearer form with
or without coupons, and in denominations set forth in the Prospectus Supplement.
No service charge will be made for any registration of transfer of registered
Debt Securities or exchange of Debt Securities, but the Company may require
payment of a sum sufficient to cover any tax or other governmental charges that
may be imposed in connection therewith. Each Indenture provides that Debt
Securities issued thereunder may be issued in global form. If any series of Debt
Securities is issuable in global form, the applicable Prospectus Supplement will
describe the circumstances, if any, under which beneficial owners of interest in
any such global Debt Securities may exchange such interests for Debt Securities
of such series and of like tenor and principal amount in any authorized form and
denomination. Principal of, and any premium, Additional Amounts and interest on,
a global Debt Security will be payable in the manner described in the applicable
Prospectus Supplement.
 
    The provisions of the Indentures described above provide the Company with
the ability, in addition to the ability to issue Debt Securities with terms
different from those of Debt Securities previously issued, to "reopen" a
previous issue of a series of Debt Securities and issue additional Debt
Securities of such series.
 
    The Senior Debt Securities will be unsecured and will rank pari passu with
all other unsecured and unsubordinated indebtedness of the Company. The
Subordinated Debt Securities will be unsecured and will be subordinated to all
existing and future Senior Indebtedness (as defined below) of the Company. Since
the Company is a holding company, the right of the Company, and hence the right
of creditors of the Company (including the Holders of the Debt Securities), to
participate in any distribution of the assets of any subsidiary upon its
liquidation or reorganization or otherwise is necessarily subject to the prior
claims of creditors of the subsidiary, except to the extent that claims of the
Company itself as a creditor of the subsidiary may be recognized. In addition,
dividends, loans and advances from certain subsidiaries, including MLPF&S, to
the Company are restricted by net capital requirements under the Exchange Act
and under rules of certain exchanges and other regulatory bodies.
 
    Principal and any interest, premium and Additional Amounts will be payable
in the manner, at the places and subject to the restrictions set forth in the
applicable Indenture, the Debt Securities and the Prospectus Supplement relating
thereto, provided that payment of any interest and any Additional Amounts may be
made at the option of the Company by check mailed to the holders of registered
Debt Securities at their registered addresses.
 
    Debt Securities may be presented for exchange, and registered Debt
Securities may be presented for transfer, in the manner, at the places and
subject to the restrictions set forth in the applicable Indenture, the Debt
Securities and the Prospectus Supplement relating thereto. Debt Securities in
bearer form and the coupons, if any, pertaining thereto will be transferable by
delivery. No service charge will be made for
 
                                       5
<PAGE>
any transfer or exchange of Debt Securities, but the Company may require payment
of a sum sufficient to cover any tax or other governmental charge payable in
connection therewith.
 
MERGER AND CONSOLIDATION
 
    The Company may consolidate or merge with or into any other corporation, and
the Company may sell, lease or convey all or substantially all of its assets to
any corporation, provided that (i) the corporation (if other than the Company)
formed by or resulting from any such consolidation or merger or which shall have
received such assets shall be a corporation organized and existing under the
laws of the United States of America or a state thereof and shall assume payment
of the principal of, and any premium, Additional Amounts or interest on, the
Debt Securities and the performance and observance of all of the covenants and
conditions of the Indentures to be performed or observed by the Company, and
(ii) the Company or such successor corporation, as the case may be, shall not
immediately thereafter be in default under the Indentures.
 
MODIFICATION AND WAIVER
 
    Modification and amendment of each Indenture may be effected by the Company
and the applicable Trustee with the consent of the Holders of at least 66 2/3%
in principal amount of the Outstanding Debt Securities of each series issued
pursuant to such Indenture and affected thereby, provided that no such
modification or amendment may, without the consent of the Holder of each
Outstanding Debt Security affected thereby, (a) change the Stated Maturity of,
or any installment of interest or Additional Amounts on, any Debt Security or
any premium payable on the redemption thereof, or change the Redemption Price;
(b) reduce the principal amount of, or the interest or Additional Amounts
payable on, any Debt Security or reduce the amount of principal which could be
declared due and payable prior to the Stated Maturity; (c) change the place or
currency of any payment of principal of, or any premium, interest or Additional
Amounts on, any Debt Security; (d) impair the right to institute suit for the
enforcement of any payment on or with respect to any Debt Security; (e) reduce
the percentage in principal amount of the Outstanding Debt Securities of any
series, the consent of whose Holders is required to modify or amend such
Indenture; or (f) modify the foregoing requirements or reduce the percentage of
Outstanding Debt Securities necessary to waive any past default to less than a
majority. No modification or amendment of the Subordinated Indenture or any
Subsequent Indenture for Subordinated Debt Securities may adversely affect the
rights of any Holder of Senior Indebtedness without the consent of such Holder.
Except with respect to certain fundamental provisions, the Holders of at least a
majority in principal amount of Outstanding Debt Securities of any series may,
with respect to such series, waive past defaults under the applicable Indenture
and waive compliance by the Company with certain provisions of such Indenture.
 
EVENTS OF DEFAULT
 
    Under each Indenture, the following will be Events of Default with respect
to Debt Securities of any series issued thereunder: (a) default in the payment
of any interest or Additional Amounts upon any Debt Security of that series when
due, and such default has continued for 30 days; (b) default in the payment of
any principal of or premium, if any, on any Debt Security of that series when
due; (c) default in the deposit of any sinking fund payment, when due, in
respect of any Debt Security of that series; (d) default in the performance of
any other covenant of the Company contained in such Indenture for the benefit of
such series or in the Debt Securities of such series, and such default has
continued for 60 days after written notice as provided in such Indenture; (e)
certain events in bankruptcy, insolvency or reorganization; and (f) any other
Event of Default provided with respect to Debt Securities of that series. The
applicable Trustee or the Holders of 25% in principal amount of the Outstanding
Debt Securities of that series may declare the principal amount (or such lesser
amount as may be provided for in the Debt Securities of that series) of all
Outstanding Debt Securities of that series and the interest accrued thereon and
Additional Amounts payable in respect thereof, if any, to be due and payable
immediately if an Event of Default with
 
                                       6
<PAGE>
respect to Debt Securities of such series shall occur and be continuing at the
time of declaration. At any time after a declaration of acceleration has been
made with respect to Debt Securities of any series but before a judgment or
decree for payment of money due has been obtained by the applicable Trustee, the
Holders of a majority in principal amount of the Outstanding Debt Securities of
that series may rescind any declaration of acceleration and its consequences,
provided that all payments due (other than those due as a result of
acceleration) have been made and all Events of Default have been remedied or
waived. Any Event of Default with respect to Debt Securities of any series may
be waived by the Holders of a majority in principal amount of all Outstanding
Debt Securities of that series, except in a case of failure to pay principal of
or premium, if any, or interest or Additional Amounts, if any, on any Debt
Security of that series for which payment had not been subsequently made or in
respect of a covenant or provision which cannot be modified or amended without
the consent of the Holder of each Outstanding Debt Security of such series
affected.
 
    The Holders of a majority in principal amount of the Outstanding Debt
Securities of a series may direct the time, method and place of conducting any
proceeding for any remedy available to the applicable Trustee or exercising any
trust or power conferred on such Trustee with respect to Debt Securities of such
series, provided that such direction shall not be in conflict with any rule of
law or the applicable Indenture. Subject to the provisions of each Indenture
relating to the duties of the appropriate Trustee, before proceeding to exercise
any right or power under an Indenture at the direction of such Holders, the
applicable Trustee shall be entitled to receive from such Holders reasonable
security or indemnity against the costs, expenses and liabilities which might be
incurred by it in complying with any such direction.
 
    The Company will be required to furnish to each Trustee annually a statement
as to the fulfillment by the Company of all of its obligations under the
applicable Indenture.
 
SPECIAL TERMS RELATING TO THE SENIOR DEBT SECURITIES
 
LIMITATIONS UPON LIENS
 
    The Senior Indentures provide that the Company may not, and may not permit
any Subsidiary to, create, assume, incur or permit to exist any indebtedness for
borrowed money secured by a pledge, lien or other encumbrance (except for
certain liens specifically permitted by the Senior Indentures) on the Voting
Stock owned directly or indirectly by the Company of any Subsidiary (other than
a Subsidiary which, at the time of incurrence of such secured indebtedness, has
a net worth of less than $3,000,000) without making effective provision whereby
the Outstanding Senior Debt Securities will be secured equally and ratably with
such secured indebtedness.
 
LIMITATIONS ON DISPOSITION OF VOTING STOCK OF, AND MERGER AND SALE OF ASSETS BY,
  MLPF&S
 
    The Senior Indentures provide that the Company may not sell, transfer or
otherwise dispose of any Voting Stock of MLPF&S or permit MLPF&S to issue, sell
or otherwise dispose of any of its Voting Stock, unless, after giving effect to
any such transaction, MLPF&S remains a Controlled Subsidiary (defined in the
Senior Indentures to mean a corporation more than 80% of the outstanding shares
of Voting Stock of which are owned directly or indirectly by the Company). In
addition, the Senior Indentures provide that the Company may not permit MLPF&S
to (i) merge or consolidate, unless the surviving company is a Controlled
Subsidiary, or (ii) convey or transfer its properties and assets substantially
as an entirety, except to one or more Controlled Subsidiaries.
 
                                       7
<PAGE>
SPECIAL TERMS RELATING TO THE SUBORDINATED DEBT SECURITIES
 
    Upon any distribution of assets of the Company resulting from any
dissolution, winding up, liquidation or reorganization, payments on Subordinated
Debt Securities are to be subordinated to the extent provided in the
Subordinated Indenture in right of payment to the prior payment in full of all
Senior Indebtedness, but the obligation of the Company to make payments on the
Subordinated Debt Securities will not otherwise be affected. No payment on
Subordinated Debt Securities may be made at any time when there is a default in
the payment of any principal, premium, interest, Additional Amounts, if any, or
sinking fund of or on any Senior Indebtedness. Holders of Subordinated Debt
Securities will be subrogated to the rights of holders of Senior Indebtedness to
the extent of payments made on Senior Indebtedness upon any distribution of
assets in any such proceedings out of the distributive shares of Subordinated
Debt Securities. By reason of such subordination, in the event of a distribution
of assets upon insolvency, certain creditors of the Company may recover more,
ratably, than Holders of Subordinated Debt Securities.
 
    Senior Indebtedness is defined in the Subordinated Indenture as the
principal of, premium, if any, and unpaid interest on (a) indebtedness of the
Company (including indebtedness of others guaranteed by the Company), other than
the Subordinated Debt Securities, whether outstanding on the date of execution
of the Subordinated Indenture or thereafter created, incurred, assumed or
guaranteed, (i) for money owing to banks, (ii) for money borrowed from sources
other than banks or (iii) in connection with the acquisition by the Company or a
subsidiary of assets of any kind except in the ordinary course of business,
unless in the instrument creating or evidencing the same or pursuant to which
the same is outstanding it is provided that such indebtedness is not superior in
right of payment to the Subordinated Debt Securities, and (b) renewals,
extensions, modifications and refundings of any such indebtedness. As of March
28, 1997, a total of approximately $64.1 billion of the Company's indebtedness
would have been Senior Indebtedness as so defined.
 
                          DESCRIPTION OF DEBT WARRANTS
 
    The Company may issue, together with Debt Securities, Currency Warrants or
Index Warrants or separately, Debt Warrants for the purchase of Debt Securities.
The Debt Warrants are to be issued under debt warrant agreements (each a "Debt
Warrant Agreement") to be entered into between the Company and a bank or trust
company, as debt warrant agent (the "Debt Warrant Agent"), all as shall be set
forth in the Prospectus Supplement relating to Debt Warrants being offered
thereby. A copy of the form of Debt Warrant Agreement, including the form of
warrant certificates representing the Debt Warrants (the "Debt Warrant
Certificates"), reflecting the alternative provisions to be included in the Debt
Warrant Agreements that will be entered into with respect to particular
offerings of Debt Warrants, is filed as an exhibit to the Registration
Statement. The following summaries of certain provisions of the Debt Warrant
Agreement and the Debt Warrant Certificates do not purport to be complete and
are subject to, and are qualified in their entirety by reference to, all the
provisions of the Debt Warrant Agreement and the Debt Warrant Certificates,
respectively, including the definitions therein of certain terms.
 
GENERAL
 
    The applicable Prospectus Supplement will describe the terms of Debt
Warrants offered thereby, the Debt Warrant Agreement relating to such Debt
Warrants and the Debt Warrant Certificates representing such Debt Warrants,
including the following: (1) the designation, aggregate principal amount, price
at which such principal amount may be purchased upon exercise and terms of the
Debt Securities purchasable upon exercise of such Debt Warrants, including
whether such Debt Securities are Senior Debt Securities or Subordinated Debt
Securities, and the procedures and conditions relating to the exercise of such
Debt Warrants; (2) the designation and terms of any related Debt Securities with
which such Debt Warrants are issued, including whether such Debt Securities are
Senior Debt Securities or Subordinated Debt Securities, the number of such Debt
Warrants issued with each such Debt Security, and the Indenture under which the
Debt Securities will be issued; (3) the date, if any, on and after which such
Debt Warrants
 
                                       8
<PAGE>
and the related Debt Securities will be separately transferable; (4) the date on
which the right to exercise such Debt Warrants shall commence and the date on
which such right shall expire (the "Expiration Date"); (5) if the Debt
Securities purchasable upon exercise of such Debt Warrants are original issue
discount Debt Securities, a discussion of Federal income tax considerations
applicable thereto; and (6) whether the Debt Warrants represented by the Debt
Warrant Certificates will be issued in registered or bearer form, and, if
registered, where they may be transferred and registered.
 
    Debt Warrant Certificates will be exchangeable for new Debt Warrant
Certificates of different denominations and Debt Warrants may be exercised at
the corporate trust office of the Debt Warrant Agent or any other office
indicated in the Prospectus Supplement. Prior to the exercise of their Debt
Warrants, holders of Debt Warrants will not have any of the rights of Holders of
the Debt Securities purchasable upon such exercise and will not be entitled to
payments of principal of, and any premium, Additional Amounts, if any, or
interest on, the Debt Securities purchasable upon such exercise.
 
EXERCISE OF DEBT WARRANTS
 
    Each Debt Warrant will entitle the Holder to purchase for cash such
principal amount of Debt Securities at such exercise price as shall in each case
be set forth in, or be determinable as set forth in, the Prospectus Supplement
relating to the Debt Warrants offered thereby. Debt Warrants may be exercised at
any time up to the close of business on the Expiration Date set forth in the
Prospectus Supplement relating to the Debt Warrants offered thereby. After the
close of business on the Expiration Date, unexercised Debt Warrants will become
void.
 
    Debt Warrants may be exercised as set forth in the Prospectus Supplement
relating to the Debt Warrants offered thereby. Upon receipt of payment and the
Debt Warrant Certificate properly completed and duly executed at the corporate
trust office of the Debt Warrant Agent or any other office indicated in the
Prospectus Supplement, the Company will, as soon as practicable, forward the
Debt Securities purchasable upon such exercise. If less than all of the Debt
Warrants represented by such Debt Warrant Certificate are exercised, a new Debt
Warrant Certificate will be issued for the remaining amount of Debt Warrants.
 
                        DESCRIPTION OF CURRENCY WARRANTS
 
    The Company may issue, together with Debt Securities, Debt Warrants or Index
Warrants or separately, Currency Warrants either in the form of Currency Put
Warrants entitling the Holders thereof to receive from the Company the cash
settlement value in U.S. dollars of the right to sell a specified amount of a
specified foreign currency or currency units for a specified amount of U.S.
dollars, or in the form of Currency Call Warrants entitling the Holders thereof
to receive from the Company the cash settlement value in U.S. dollars of the
right to purchase a specified amount of a specified foreign currency or units of
two or more currencies for a specified amount of U.S. dollars. The Currency
Warrants are to be issued under a currency put warrant agreement or a currency
call warrant agreement, as applicable (each a "Currency Warrant Agreement"), to
be entered into between the Company and a bank or trust company, as currency
warrant agent (the "Currency Warrant Agent"), all as shall be set forth in the
applicable Prospectus Supplement. Copies of the forms of Currency Put Warrant
Agreement and Currency Call Warrant Agreement, including the forms of warrant
certificates representing the Currency Put Warrants and Currency Call Warrants
(the "Currency Warrant Certificates"), reflecting the provisions to be included
in the Currency Warrant Agreements that will be entered into with respect to
particular offerings of Currency Warrants, are filed as exhibits to the
Registration Statement. The following summaries of certain provisions of the
Currency Warrant Agreements and the Currency Warrant Certificates do not purport
to be complete and are subject to, and are qualified in their entirety by
reference to, all the provisions of the Currency Warrant Agreements and the
Currency Warrant Certificates, respectively, including the definitions therein
of certain terms.
 
                                       9
<PAGE>
GENERAL
 
    The applicable Prospectus Supplement will describe the terms of Currency
Warrants offered thereby, the Currency Warrant Agreement relating to such
Currency Warrants and the Currency Warrant Certificates representing such
Currency Warrants, including the following: (1) whether such Currency Warrants
shall be Currency Put Warrants, Currency Call Warrants, or both; (2) the formula
for determining the cash settlement value of each Currency Warrant; (3) the
procedures and conditions relating to the exercise of such Currency Warrants;
(4) the circumstances which will cause the Currency Warrants to be deemed to be
automatically exercised; (5) any minimum number of Currency Warrants which must
be exercised at any one time, other than upon automatic exercise; and (6) the
date on which the right to exercise such Currency Warrants shall commence and
the date on which such right shall expire (the "Expiration Date"), provided that
the commencement date and the Expiration Date may be the same date.
 
BOOK-ENTRY PROCEDURES
 
    Except as may otherwise be provided in an applicable Prospectus Supplement,
the Currency Warrants will be issued in the form of global Currency Warrant
Certificates, registered in the name of a depository or its nominee. Beneficial
owners will not be entitled to receive definitive certificates representing
Currency Warrants. Ownership of a Currency Warrant will be recorded on or
through the records of the brokerage firm or other entity that maintains a
beneficial owner's account. In turn, the total number of Currency Warrants held
by an individual brokerage firm for its clients will be maintained on the
records of the depository in the name of such brokerage firm or its agent.
Transfer of ownership of any Currency Warrant will be effected only through the
selling beneficial owner's brokerage firm.
 
EXERCISE OF CURRENCY WARRANTS
 
    Each Currency Warrant will entitle the Holder to the cash settlement value
of such Currency Warrant on the applicable Exercise Date, in each case as such
terms will be defined in the applicable Prospectus Supplement. If a Currency
Warrant has more than one exercise date and is not exercised prior to 1:30 P.M.,
New York City time, on the fifth New York Business Day preceding the Expiration
Date, Currency Warrants will be deemed automatically exercised.
 
LISTING
 
    Each issue of Currency Warrants will be listed on a national securities
exchange, subject only to official notice of issuance, as a condition of sale of
any such Currency Warrants. In the event that the Currency Warrants are delisted
from, or permanently suspended from trading on, such exchange, the Expiration
Date for such Currency Warrants will be the date such delisting or trading
suspension becomes effective and Currency Warrants not previously exercised will
be deemed automatically exercised on the business day immediately preceding such
Expiration Date. The applicable Currency Warrant Agreement will contain a
covenant of the Company not to seek delisting of the Currency Warrants, or
suspension of their trading, on such exchange.
 
                         DESCRIPTION OF INDEX WARRANTS
 
    The Company may issue from time to time Index Warrants consisting of put
warrants (the "Index Put Warrants") or call warrants (the "Index Call
Warrants"). The Index Warrants will entitle the holders to receive from the
Company a payment or delivery, subject to applicable law, determined by
reference to decreases (in the case of Index Put Warrants) or to increases (in
the case of Index Call Warrants) in the level of an index or portfolio based on
one or more equity or debt securities (including the price or yield of such
securities), any statistical measure of economic or financial performance
(including any consumer price, currency or mortgage index) or the price or value
of any commodity or any combination thereof (the "Index"). Unless otherwise
specified in the accompanying Prospectus Supplement, payments, if any, upon
 
                                       10
<PAGE>
exercise (or deemed exercise) of the Index Warrants will be made in U.S.
dollars. The Index Warrants will be offered on terms to be determined at the
time of sale.
 
GENERAL
 
    The applicable Prospectus Supplement will describe the Index Warrant
Agreement or Index Warrant Trust Indenture (each as defined below), as the case
may be, relating to the Index Warrants being offered thereby and the terms of
such Index Warrants, including, without limitation: (i) whether the Index
Warrants to be issued will be Index Put Warrants, Index Call Warrants or both;
(ii) the aggregate number and initial public offering price or purchase price;
(iii) the Index for such Index Warrants; (iv) whether the Index Warrants will be
deemed exercised as of a specified date or whether the Index Warrants may be
exercised during a period and the date on which the right to exercise such Index
Warrants commences and the date on which such right expires; (v) the manner in
which such Index Warrants may be exercised and any restrictions on, or other
special provisions relating to, the exercise of such Index Warrants; (vi) the
minimum number, if any, of such Index Warrants exercisable at any one time;
(vii) the maximum number, if any, of such Index Warrants that may, subject to
the Company's election, be exercised by all Index Warrantholders (or by any
person or entity) on any day; (viii) any provisions permitting an Index
Warrantholder to condition an exercise notice on the absence of certain
specified changes in the level of the applicable Index after the exercise date,
any provisions permitting the Company to suspend exercise of such Index Warrants
based on market conditions or other circumstances and any other special
provision relating to the exercise of such Index Warrants; (ix) any provisions
for the automatic exercise of such Index Warrants other than at expiration; (x)
any provisions permitting the Company to cancel such Index Warrants upon the
occurrence of certain events; (xi) any additional circumstances which would
constitute an Event of Default with respect to such Index Warrants; (xii) the
method of determining (a) the payment or delivery, if any, to be made in
connection with the exercise or deemed exercise of such Index Warrants (the
"Settlement Value"), (b) the minimum payment or delivery, if any, to be made
upon expiration of such Index Warrants (the "Minimum Expiration Value"), (c) the
payment or delivery to be made upon the exercise of any right which the Company
may have to cancel such Index Warrants and (d) the value of the Index; (xiii) in
the case of Index Warrants relating to an Index for which the trading prices of
underlying securities, commodities or rates are expressed in a foreign currency,
the method of converting amounts in the relevant foreign currency or currencies
into U.S. dollars (or such other currency or composite currency in which the
Index Warrants are payable); (xiv) the method of providing for a substitute
index or otherwise determining the payment or delivery, if any, to be made in
connection with the exercise of such Index Warrants if the Index changes or
ceases to be made available by its publisher; (xv) the time or times at which
payment or delivery, if any, will be made in respect of such Index Warrants
following exercise or deemed exercise; (xvi) the self-regulatory organization on
which such Index Warrants will be traded, if any; (xvii) any provisions for
issuing such Index Warrants in other than book-entry form; (xviii) if such Index
Warrants are not issued in book-entry form, the place or places at which payment
or delivery on cancellation, if any, and the Minimum Expiration Value, if any,
of such Index Warrants is to be made by the Company; (xix) certain U.S. federal
income tax consequences relating to such Index Warrants; and (xx) other specific
provisions.
 
    Except as otherwise provided in the applicable Prospectus Supplement, each
issue of Index Warrants will contain the terms set forth below.
 
    The Index Warrants which are issued without a Minimum Expiration Value will
be issued under one or more index warrant agreements (each, an "Index Warrant
Agreement") to be entered into between the Company and a bank or trust company,
as warrant agent (the "Index Warrant Agent"), all as described in the Prospectus
Supplement relating to such Index Warrants. The Index Warrant Agent will act
solely as the agent of the Company under the applicable Index Warrant Agreement
and will not assume any obligation or relationship of agency or trust for or
with any Index Warrantholders. A single bank or trust company may act as Index
Warrant Agent for more than one issue of Index Warrants.
 
                                       11
<PAGE>
    The Index Warrants which are issued with a Minimum Expiration Value will be
issued under one or more index warrant trust indentures (each an "Index Warrant
Trust Indenture") to be entered into between the Company and a corporation (or
other person permitted to so act by the Trust Indenture Act of 1939, as amended
from time to time (the "Trust Indenture Act")), to act as trustee (the "Index
Warrant Trustee"), all as described in the Prospectus Supplement relative to
such Index Warrants. Any Index Warrant Trust Indenture will be qualified under
the Trust Indenture Act. To the extent allowed by the Trust Indenture Act, a
single qualified corporation may act as Index Warrant Trustee for more than one
issue of Index Warrants.
 
    Forms of Index Warrant Agreement and Index Warrant Trust Indenture and the
respective global index warrant certificates related thereto are filed as
exhibits to the Registration Statement. The summaries herein of certain
provisions of the Index Warrant Agreement, the Index Warrant Trust Indenture and
global index warrant certificates do not purport to be complete and are subject
to, and are qualified in their entirety by reference to, all the provisions of
the Index Warrant Agreement, the Index Warrant Trust Indenture and global index
warrant certificates, respectively.
 
    The Company will have the right to "reopen" a previous issue of Index
Warrants and to issue additional Index Warrants of such issue without the
consent of any Index Warrantholder.
 
    The Index Warrants involve a high degree of risk, including the risk that
the Index Warrants will expire worthless except for the Minimum Expiration
Value, if any, of such Index Warrants. Investors should therefore be prepared to
sustain a total loss of the purchase price of the Index Warrants (except for the
Minimum Expiration Value, if applicable). Investors who consider purchasing
Index Warrants should be experienced with respect to options and option
transactions and reach an investment decision only after carefully considering
the suitability of the Index Warrants in light of their particular circumstances
and the information set forth below as well as additional information contained
in the Prospectus Supplement relating to such Index Warrants.
 
    Unless otherwise provided in the Prospectus Supplement, each Index Warrant
will entitle Index Warrantholders to receive from the Company upon exercise the
Settlement Value of such Index Warrant. Certain Index Warrants issued pursuant
to an Index Warrant Trust Indenture will, if specified in the Prospectus
Supplement, entitle the Index Warrantholder to receive from the Company, under
certain circumstances specified in the Prospectus Supplement, a payment or
delivery equal to the greater of the applicable Settlement Value and a Minimum
Expiration Value of such Index Warrants. In addition, certain Index Warrants
will, if specified in the Prospectus Supplement, entitle Index Warrantholders to
receive from the Company a certain payment or delivery upon cancellation of the
Index Warrants by the Company, upon the occurrence of specified events. In
addition, if so specified in the Prospectus Supplement, following the occurrence
of an extraordinary event, the Settlement Value of an Index Warrant may, at the
option of the Company, be determined on a different basis, including in
connection with automatic exercise at expiration.
 
    Unless otherwise specified in the related Prospectus Supplement, the Index
Warrants will be deemed to be automatically exercised upon expiration or such
earlier date that may be specified. Upon such automatic exercise, Index
Warrantholders will be entitled to receive a payment or delivery equal to the
Settlement Value of the Index Warrants, except that holders of Index Warrants
having a Minimum Expiration Value will be entitled to receive a payment or
delivery equal to the greater of such Settlement Value and the applicable
Minimum Expiration Value. The Minimum Expiration Value may be either a
predetermined payment or delivery or a payment or delivery that varies during
the term of the Index Warrants in accordance with a schedule or formula. Any
Minimum Expiration Value applicable to an issue of Index Warrants, as well as
any additional circumstances resulting in the automatic exercise of such Index
Warrants, will be specified in the related Prospectus Supplement.
 
    If so specified in the Prospectus Supplement, the Index Warrants may be
canceled by the Company, or the exercise or valuation of, or payment or delivery
for, such Index Warrants may be delayed or postponed
 
                                       12
<PAGE>
upon the occurrence of an extraordinary event. Any extraordinary events relating
to an issue of Index Warrants will be set forth in the related Prospectus
Supplement. Upon cancellation, the related Index Warrantholders will be entitled
to receive only the applicable payment or delivery on cancellation specified in
such Prospectus Supplement. The payment or delivery on cancellation may be
either a predetermined payment or delivery or a payment or delivery that varies
during the term of the Index Warrants in accordance with a schedule or formula.
 
    If the Company defaults with respect to any of its obligations under Index
Warrants which are issued with a Minimum Expiration Value pursuant to an Index
Warrant Trust Indenture, such default may be waived by the Index Warrantholders
of a majority in interest of all outstanding Index Warrants, except a default in
the payment or delivery of the Settlement Value, Minimum Expiration Value or
cancellation payment or delivery (if applicable) on such Index Warrants or in
respect of a covenant or provision of the applicable Index Warrant Trust
Indenture which cannot be modified or amended without the consent of the Index
Warrantholder of each outstanding Index Warrant affected.
 
    The Index Warrants are unsecured contractual obligations of the Company and
will rank PARI PASSU with the Company's other unsecured contractual obligations
and with the Company's unsecured and unsubordinated debt. Since the Company is a
holding company, the right of the Company, and hence the right of creditors of
the Company (including the Holders of the Debt Securities), to participate in
any distribution of the assets of any subsidiary upon its liquidation or
reorganization or otherwise is necessarily subject to the prior claims of
creditors of the subsidiary, except to the extent that claims of the Company
itself as a creditor of the subsidiary may be recognized. In addition,
dividends, loans and advances from certain subsidiaries, including MLPF&S, to
the Company are restricted by net capital requirements under the Exchange Act
and under rules of certain exchanges and other regulatory bodies.
 
    Certain special United States federal income tax considerations may be
applicable to instruments such as the Index Warrants. The related Prospectus
Supplement will describe such tax considerations. The summary of United States
Federal income tax considerations contained in the Prospectus Supplement will be
presented for informational purposes only, however, and will not be intended as
legal or tax advice to prospective purchasers. Prospective purchasers of Index
Warrants are urged to consult their own tax advisors prior to any acquisition of
Index Warrants.
 
BOOK-ENTRY PROCEDURES
 
    Except as may otherwise be provided in an applicable Prospectus Supplement,
Index Warrants will be issued in book-entry form and represented by global Index
Warrants, registered in the name of a depository or its nominee. Except as may
otherwise be provided in an applicable Prospectus Supplement, Index
Warrantholders will not be entitled to receive definitive certificates
representing Index Warrants, unless the depository is unwilling or unable to
continue as depository or the Company decides to have the Index Warrants
represented by definitive certificates. A beneficial owner's interest in an
Index Warrant represented by a global Index Warrant will be recorded on or
through the records of the brokerage firm or other entity that maintains such
beneficial owner's account. In turn, the total number of Index Warrants held by
an individual brokerage firm or other entity for its clients will be maintained
on the records of the depository in the name of such brokerage firm or other
entity or its agent. Transfer of ownership of any Index Warrant will be effected
only through the selling beneficial owner's brokerage firm.
 
LISTING
 
    Unless otherwise indicated in the Prospectus Supplement, the Index Warrants
will be traded pursuant to the rules of a self-regulatory organization as
specified in the Prospectus Supplement. It is expected that such self-regulatory
organization will cease trading an issue of Index Warrants at the close of
business on the related expiration date of such Index Warrants.
 
                                       13
<PAGE>
MODIFICATION
 
    Any Index Warrant Agreement or Index Warrant Trust Indenture and the terms
of the related Index Warrants may be amended by the Company and the Index
Warrant Agent or Index Warrant Trustee, as the case may be (which amendment
shall take the form of a supplemental index warrant agreement or supplemental
index warrant trust indenture (collectively referred to as "Supplemental
Agreements")), without the consent of the holders of any Index Warrants, for the
purpose of (i) curing any ambiguity, or of curing, correcting or supplementing
any defective or inconsistent provision contained therein, or of making any
other provisions with respect to matters or questions arising under the Index
Warrant Agreement or Index Warrant Trust Indenture, as the case may be, which
shall not be inconsistent with the provisions thereof or of the Index Warrants,
(ii) evidencing the succession of another corporation to the Company and the
assumption by any such successor of the covenants of the Company contained in
the Index Warrant Agreement or the Index Warrant Trust Indenture, as the case
may be, and the Index Warrants, (iii) appointing a successor depository, (iv)
evidencing and providing for the acceptance of appointment by a successor Index
Warrant Agent or Index Warrant Trustee with respect to the Index Warrants, as
the case may be, (v) adding to the covenants of the Company, for the benefit of
the Index Warrantholders or surrendering any right or power conferred upon the
Company under the Index Warrant Agreement or Index Warrant Trust Indenture, as
the case may be, (vi) issuing Index Warrants in definitive form, or (vii)
amending the Index Warrant Agreement or Index Warrant Trust Indenture, as the
case may be, in any manner which the Company may deem to be necessary or
desirable and which will not materially and adversely affect the interests of
the Index Warrantholders.
 
    The Company and the Index Warrant Agent may also amend any Index Warrant
Agreement or Index Warrant Trust Indenture, as the case may be, and the terms of
the related Index Warrants (which amendment shall take the form of a
Supplemental Agreement) with the consent of the Index Warrantholders holding not
less than 66 2/3% in number of the then outstanding unexercised Index Warrants
affected by such amendment, for the purpose of adding any provisions to or
changing in any manner or eliminating any of the provisions of the Index Warrant
Agreement or Index Warrant Trust Indenture, as the case may be, or of modifying
in any manner the rights of the Index Warrantholders; provided that no such
amendment that (i) changes the determination of the Settlement Value or the
payment or delivery to be made on cancellation, if any, or Minimum Expiration
Value, if any, of the Index Warrants (or any aspects of such determination) so
as to reduce the payment or delivery to be made upon exercise or deemed
exercise, (ii) shortens the period of time during which the Index Warrants may
be exercised, or otherwise materially and adversely affects the exercise rights
of the Index Warrantholders or (iii) reduces the number of outstanding Index
Warrants, the consent of whose holders is required for amendment of the Index
Warrant Agreement, the Index Warrant Trust Indenture or the terms of the related
Index Warrants, may be made without the consent of each Index Warrantholder
affected thereby.
 
EVENTS OF DEFAULT
 
    Certain events in bankruptcy, insolvency or reorganization of the Company
will constitute an Event of Default with respect to Index Warrants having a
Minimum Expiration Value which are issued under an Index Warrant Trust
Indenture. Upon the occurrence of an Event of Default, the holders of 25% of
unexercised Index Warrants may elect to receive a settlement payment or delivery
for such unexercised Index Warrants, which will immediately become due to the
Index Warrantholders upon such election in an amount equal to the market value
of such Index Warrants (assuming the Company's ability to satisfy its
obligations under such Index Warrants as they would become due) as of the date
the Company is notified of the intended liquidation, as determined by a
nationally recognized securities broker-dealer unaffiliated with the Company and
mutually selected by the Company and the Index Warrant Trustee.
 
                                       14
<PAGE>
MERGER, CONSOLIDATION, SALE, LEASE OR OTHER DISPOSITIONS
 
    The Company may consolidate or merge with or into any other corporation and
the Company may sell, lease or convey all or substantially all of its assets to
any corporation, provided that (i) the corporation (if other than the Company)
formed by or resulting from any such consolidation or merger or which shall have
received such assets shall be a corporation organized and existing under the
laws of the United States of America or a State thereof and shall assume the
Company's obligations in respect of the payment or delivery of the Settlement
Value (or any Minimum Expiration Value or cancellation payment or delivery, if
applicable) with respect to all the unexercised Index Warrants and the
performance and observance of all of the covenants and conditions of the Index
Warrant Agreement or Index Warrant Trust Indenture, as the case may be, to be
performed or observed by the Company, and (ii) the Company or such successor
corporation, as the case may be, shall not immediately be in default under the
Index Warrant Agreement or Index Warrant Trust Indenture, as the case may be.
 
ENFORCEABILITY OF RIGHTS BY INDEX WARRANTHOLDERS
 
    Any Index Warrantholder may, without the consent of the related Index
Warrant Agent, enforce by appropriate legal action, in and for its own behalf,
its right to exercise, and receive payment or delivery for, its Index Warrants.
 
                              PLAN OF DISTRIBUTION
 
    The Company may sell Securities (i) through MLPF&S as agent, (ii) to the
public through, or through underwriting syndicates managed or co-managed by, one
or more underwriters, including MLPF&S, or (iii) directly to purchasers. The
Prospectus Supplement with respect to the Securities of a particular series
describes the terms of the offering of such Securities, including the name of
the agent or the name or names of any underwriters, the public offering or
purchase price, any discounts and commissions to be allowed or paid to the agent
or underwriters, all other items constituting underwriting compensation, the
discounts and commissions to be allowed or paid to dealers, if any, and the
exchanges, if any, on which the Securities will be listed. Only the agents or
underwriters so named in the Prospectus Supplement are agents or underwriters in
connection with the Securities offered thereby. Under certain circumstances, the
Company may repurchase Securities and reoffer them to the public as set forth
above. The Company may also arrange for repurchases and resales of such
Securities by dealers.
 
    If so indicated in the Prospectus Supplement, the Company will authorize
underwriters to solicit offers by certain institutions to purchase Debt
Securities from the Company pursuant to delayed delivery contracts providing for
payment and delivery on the date stated in the Prospectus Supplement. Each such
contract will be for an amount not less than, and, unless the Company otherwise
agrees, the aggregate principal amount of Debt Securities sold pursuant to such
contracts shall not be more than, the respective amounts stated in the
Prospectus Supplement. Institutions with whom such contracts, when authorized,
may be made include commercial and savings banks, insurance companies, pension
funds, investment companies, educational and charitable institutions, and other
institutions, but shall in all cases be subject to the approval of the Company.
Delayed delivery contracts will not be subject to any conditions except that the
purchase by an institution of the Debt Securities covered thereby shall not at
the time of delivery be prohibited under the laws of any jurisdiction in the
United States to which such institution is subject.
 
    The Company has agreed to indemnify the agent and the several underwriters
against certain civil liabilities, including liabilities under the Securities
Act of 1933, as amended (the "Act"), or contribute to payments the agent or the
underwriters may be required to make in respect thereof.
 
    The distribution of Securities will conform to the requirements set forth in
the applicable sections of Rule 2720 of the Conduct Rules of the National
Association of Securities Dealers, Inc.
 
                                       15
<PAGE>
                                    EXPERTS
 
    The consolidated financial statements and related financial statement
schedules of the Company and its subsidiaries included or incorporated by
reference in the Company's 1996 Annual Report on Form 10-K, and incorporated by
reference in this Prospectus, have been audited by Deloitte & Touche LLP,
independent auditors, as stated in their reports incorporated by reference
herein. The Selected Financial Data under the captions "Operating Results",
"Financial Position" and "Common Share Data" for each of the five years in the
period ended December 27, 1996 included in the 1996 Annual Report to
Stockholders of the Company, and incorporated by reference herein, has been
derived from consolidated financial statements audited by Deloitte & Touche LLP,
as set forth in their reports included as an exhibit to the Registration
Statement or incorporated by reference herein. Such consolidated financial
statements and related financial statement schedules, and such Selected
Financial Data appearing or incorporated by reference in this Prospectus and the
Registration Statement of which this Prospectus is a part, have been included or
incorporated herein by reference in reliance upon such reports of Deloitte &
Touche LLP given upon their authority as experts in accounting and auditing.
 
    With respect to unaudited interim financial information for the periods
included in the Quarterly Reports on Form 10-Q, which are incorporated herein by
reference, Deloitte & Touche LLP have applied limited procedures in accordance
with professional standards for a review of such information. However, as stated
in their report included in such Quarterly Report on Form 10-Q, and incorporated
by reference herein, they did not audit and they do not express an opinion on
such interim financial information. Accordingly, the degree of reliance on their
reports on such information should be restricted in light of the limited nature
of the review procedures applied. Deloitte & Touche LLP are not subject to the
liability provisions of Section 11 of the Act for any such report on unaudited
interim financial information because any such report is not a "report" or a
"part" of the registration statement prepared or certified by an accountant
within the meaning of Sections 7 and 11 of the Act.
 
                                       16
<PAGE>
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                                     [LOGO]
 
                                25,500,000 UNITS
 
                           MERRILL LYNCH & CO., INC.
 
                               NIKKEI 225 MARKET
                         INDEX TARGET-TERM SECURITIESSM
                               DUE JUNE 14, 2002
                         "MITTS-REGISTERED TRADEMARK-"
 
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                             PROSPECTUS SUPPLEMENT
                            ------------------------
 
                              MERRILL LYNCH & CO.
 
                                  MAY 28, 1997
 
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