MICROSOFT CORP
S-3/A, 1996-12-13
PREPACKAGED SOFTWARE
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<PAGE>   1
 
   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON DECEMBER 13, 1996
    
 
   
                                                      REGISTRATION NO. 333-17143
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                                 UNITED STATES
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
   
                                AMENDMENT NO. 1
                                       TO
                             REGISTRATION STATEMENT
    
 
                                  ON FORM S-3
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
 
                             MICROSOFT CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<S>                                                         <C>
                        WASHINGTON                                                  91-1144442
               (STATE OR OTHER JURISDICTION                                       (IRS EMPLOYER
            OF INCORPORATION OR ORGANIZATION)                                  IDENTIFICATION NO.)
</TABLE>
 
                               ONE MICROSOFT WAY
                         REDMOND, WASHINGTON 98052-6399
                                 (206) 882-8080
          (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER INCLUDING
             AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICE)
                            ------------------------
 
                            ROBERT A. ESHELMAN, ESQ.
                               ONE MICROSOFT WAY
                         REDMOND, WASHINGTON 98052-6399
                                 (206) 882-8080
           (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)
                            ------------------------
 
                        COPIES OF ALL COMMUNICATIONS TO:
 
<TABLE>
<S>                                                   <C>
               RICHARD B. DODD, ESQ.                               ANDREW D. SOUSSLOFF, ESQ.
               PRESTON GATES & ELLIS                                  SULLIVAN & CROMWELL
                5000 COLUMBIA CENTER                                    125 BROAD STREET
                  701 FIFTH AVENUE                               NEW YORK, NEW YORK 10004-2498
           SEATTLE, WASHINGTON 98104-7078
</TABLE>
 
                            ------------------------
 
     APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:  As soon
as practicable after the effective date of this Registration Statement.
 
     If the only securities being registered on this form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box: [ ]
 
     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, please check the following box: [ ]
 
                            ------------------------
 
   
     THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>   2
 
   
                 SUBJECT TO COMPLETION, DATED DECEMBER 13, 1996
    
                                        SHARES
 
                                     (LOGO)
 
                             MICROSOFT CORPORATION
                    % CONVERTIBLE EXCHANGEABLE PRINCIPAL-PROTECTED
                           PREFERRED SHARES, SERIES A
 (MINIMUM VALUE AT MATURITY AND LIQUIDATION PREFERENCE OF $          PER SHARE)
                   (SUBJECT TO CONVERSION INTO COMMON SHARES
        OR EXCHANGE INTO      % CONVERTIBLE SUBORDINATED NOTES DUE 1999)
                            ------------------------
 
     Dividends on the   % Convertible Exchangeable Principal-Protected Preferred
Shares, Series A, par value $0.01 per share, will be cumulative from           ,
1996 and will be payable quarterly in arrears, commencing           , 1997 at
the rate of   % per annum (an amount equivalent to $          per annum per
share).
 
   
     On             , 1999 (the "Conversion Date"), unless previously exchanged
for Convertible Notes, as described below, each outstanding Series A Preferred
Share will automatically convert into that number of Common Shares of the
Company determined by multiplying each Series A Preferred Share by the Exchange
Rate. However, in lieu of delivering Common Shares on the Conversion Date, the
Company may, at its option, convert each Series A Preferred Share into an amount
of cash determined by multiplying the Current Market Price of the Common Shares
by the Exchange Rate. In either event, each holder of Series A Preferred Shares
will receive in cash any unpaid dividends which have accrued to the Conversion
Date. The Exchange Rate is equal to (a) if the Current Market Price of the
Common Shares is greater than or equal to $          per share (the "Threshold
Price"), a ratio equal to the Threshold Price divided by the Current Market
Price, (b) if the Current Market Price is less than the Threshold Price but
greater than $            (the "Initial Price"), a ratio of 1.0, and (c) if the
Current Market Price is less than or equal to the Initial Price, a ratio equal
to the Initial Price divided by the Current Market Price, subject in each case
to adjustments in certain events. Accordingly, holders of the Series A Preferred
Shares will receive Common Shares or cash having a value in no event less than
the Initial Price or more than the Threshold Price.
    
 
   
     The Series A Preferred Shares are exchangeable, in whole or in part, at the
option of the Company, for the Company's      % Convertible Subordinated Notes
due 1999 on any dividend payment date beginning on             , 1997 at the
rate of $          principal amount of Convertible Notes for each Series A
Preferred
    
 
                                                        (Continued on next page)
 
   
     FOR A DISCUSSION OF INVESTMENT CONSIDERATIONS AND FACTORS TO BE CONSIDERED
BY PROSPECTIVE INVESTORS, SEE "RISK FACTORS" BEGINNING ON PAGE 9.
    
                            ------------------------
 
    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.
                            ------------------------
   
<TABLE>
<CAPTION>
                                                       INITIAL PUBLIC
                                                          OFFERING        UNDERWRITING      PROCEEDS TO
                                                          PRICE(1)        DISCOUNT(2)      COMPANY(1)(3)
                                                      ----------------  ----------------  ----------------
<S>                                                   <C>               <C>               <C>
Per Series A Preferred Share........................  $                 $                 $
Total(4)............................................  $                 $                 $
</TABLE>
    
 
- ---------------
 
(1) Plus accrued dividends, if any, from the date of initial issuance of the
    Series A Preferred Shares.
 
(2) The Company has agreed to indemnify the Underwriters against certain
    liabilities, including liabilities under the Securities Act of 1933. See
    "Underwriting".
 
   
(3) Before deducting estimated expenses of $725,000 payable by the Company.
    
 
   
(4) The Company has granted the Underwriters an option, exercisable within 30
    days after the date hereof, to purchase up to an additional          Series
    A Preferred Shares at the initial public offering price per share, less the
    underwriting discount, solely to cover over-allotments. If this option is
    exercised in full, the total initial public offering price, underwriting
    discount and proceeds to Company will be $         , $         and
    $         , respectively. See "Underwriting".
    
                            ------------------------
 
   
     The Series A Preferred Shares offered hereby are offered severally by the
Underwriters, as specified herein, subject to receipt and acceptance by them and
subject to their right to reject any order in whole or in part. It is expected
that certificates for the shares will be ready for delivery in New York, New
York, on or about December   , 1996, against payment therefor in immediately
available funds.
    
 
                                      GOLDMAN, SACHS & CO.  MORGAN STANLEY & CO.
                                                           INCORPORATED
                            ------------------------
 
               The date of this Prospectus is December   , 1996.
 
     INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
     REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
     SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR
     MAY OFFERS BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
     EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
     SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE
     SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE
     UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS
     OF ANY SUCH STATE.
<PAGE>   3
 
   
Share outstanding at the time of exchange. The Company may effect such exchange
only if accrued and unpaid dividends on the Series A Preferred Shares have been
paid in full. An exchange of less than all of the outstanding Series A Preferred
Shares is permitted only if, immediately after giving effect to such exchange,
(i) the aggregate outstanding principal amount of the Convertible Notes is not
less than $250,000,000, (ii) accrued and unpaid interest on the outstanding
Convertible Notes has been paid in full and certain other requirements as
specified in the Indenture for the Convertible Notes have been satisfied, and
(iii) the aggregate liquidating distribution amount for the outstanding Series A
Preferred Shares is not less than $250,000,000. See "Description of Convertible
Notes". If the Company elects to exchange Series A Preferred Shares for
Convertible Notes, the Company will issue the Convertible Notes under an
Indenture to be entered into between the Company and Citibank, N.A. (the
"Trustee"). The Convertible Notes will be general, unsecured subordinated
obligations of the Company, limited to an aggregate principal amount equal to
the aggregate liquidation value of the Series A Preferred Shares (excluding
accrued and unpaid dividends payable upon liquidation) and will mature on
          , 1999, which is the Conversion Date. The Convertible Notes will bear
interest at the rate of      % per annum from the date of issuance, or from the
most recent interest payment date to which interest has been paid or provided
for, payable quarterly in arrears on             ,             ,             and
            of each year. Holders of Series A Preferred Shares should note that
exchange of Series A Preferred Shares for Convertible Notes or settlement at
maturity for cash will be a taxable event to the affected shareholders. Although
it is anticipated that in most instances such exchange or settlement will be
treated as an exchange giving rise to capital gain or loss, under certain
circumstances the amount realized may constitute dividend income to the affected
shareholder. See "Certain U.S. Federal Income Tax Considerations -- Exchange of
Series A Preferred Shares for Convertible Notes or Cash Settlement at
Maturity -- Section 302 Issues". It is expected that the Convertible Notes, each
in denominations of $          , will be evidenced by one or more global notes,
in fully registered form without coupons, deposited with a custodian for and
registered in the name of The Depository Trust Company or a nominee of The
Depository Trust Company. See "Description of Convertible Notes -- Book-Entry
Only Issuance -- The Depository Trust Company".
    
 
   
     At any time not more than 20 Trading Days nor fewer than two Trading Days
immediately prior to, but not including, the Conversion Date, any holder of
Convertible Notes may elect (a "Conversion Election"), by written notice to the
Trustee, to convert the Convertible Notes, on the Conversion Date, into the
right to receive the sum of (i) the Conversion Amount (as defined below) payable
at the Company's option in either Common Shares or in cash, plus (ii) the
Additional Amount (as defined below) payable in cash. Although the Convertible
Notes and the Series A Preferred Shares have substantially the same economic
provisions, the consideration to be received upon maturity of the Convertible
Notes may differ significantly from the consideration to be received upon
conversion of the Series A Preferred Shares if the holder of Convertible Notes
fails to make a Conversion Election. Any holder of a Convertible Note who does
not make a timely Conversion Election shall receive on the Conversion Date, in
lieu of the Conversion Amount and the Additional Amount and in full satisfaction
of the holder's Convertible Notes, $          in cash for each Convertible Note.
Accordingly, failure to make a timely Conversion Election will result in the
loss by the holder of the difference, if any, between $          and the
Conversion Amount. The Company will mail written notice of its election to pay
the Conversion Amount in either Common Shares or cash to each holder of record
of Convertible Notes not less than 30 Trading Days nor more than 45 Trading Days
prior to the Conversion Date and will include with such notice a description of
the procedure for making a Conversion Election. The "Conversion Amount" means an
amount (payable in either Common Shares or cash) for each Convertible Note equal
to the Current Market Price of Common Shares multiplied by the product of (x)
 .995 and (y) the Convertible Note Exchange Rate. The "Additional Amount" means
an amount (payable in cash) for each Convertible Note equal to $          . The
"Convertible Note Exchange Rate" is equal to (a) if the Current Market Price of
the Common Shares is greater than or equal to the Threshold Price, a ratio equal
to the Threshold Price divided by the Current Market Price, (b) if the Current
Market Price is less than the Threshold Price
    
 
                                        2
<PAGE>   4
 
   
but greater than the Initial Price, a ratio equal to 1.0, and (c) if the Current
Market Price is less than or equal to the Initial Price, a ratio equal to the
Initial Price divided by the Current Market Price, subject in each case to
adjustments in certain events.
    
 
     The opportunity for equity appreciation afforded by an investment in the
Series A Preferred Shares is capped at   %, although the investment has
principal protection in that investors will receive at maturity Common Shares or
cash equal to not less than $          . Holders of Series A Preferred Shares
will realize less than all of the equity appreciation on the Common Shares if at
the Conversion Date the Current Market Price is above the Threshold Price. See
"Risk Factors".
 
   
     The Series A Preferred Shares have been approved for quotation on the
Nasdaq National Market under the symbol "MSFTP". On December 12, 1996, the last
reported sale price of the Common Shares on the Nasdaq National Market was
$81.00 per share.
    
                            ------------------------
 
   
     IN CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT
TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE SERIES A
PREFERRED SHARES OR THE COMMON SHARES AT A LEVEL ABOVE THAT WHICH MIGHT
OTHERWISE PREVAIL IN THE OPEN MARKET. SUCH TRANSACTIONS MAY BE EFFECTED IN THE
OPEN MARKET OR OTHERWISE. SUCH STABILIZING, IF COMMENCED, MAY BE DISCONTINUED AT
ANY TIME.
    
                            ------------------------
 
                             AVAILABLE INFORMATION
 
     The Company is subject to the reporting requirements of the Securities
Exchange Act of 1934 (the "Exchange Act") and files reports and other
information with the Securities and Exchange Commission (the "Commission") in
accordance therewith. Such reports, proxy statements, and other information
filed by the Company are available for inspection and copying at the public
reference facilities of the Commission at 450 Fifth Street, N.W., Washington,
D.C. 20549, and at the Commission's Regional Offices located at 7 World Trade
Center, Suite 1300, New York, New York 10048, and at Citicorp Center, 500 West
Madison Street, Suite 1400, Chicago, Illinois 60661-2511. Copies of such
material may be obtained by mail from the Public Reference Section of the
Commission at 450 Fifth St., N.W., Washington, D.C. 20549, at prescribed rates.
The Commission maintains a World Wide Web site on the Internet at
http://www.sec.gov that contains reports, proxy and information statements and
other information regarding registrants that file electronically with the
Commission. The Company's Common Shares are traded as "National Market
Securities" on the Nasdaq National Market. Material filed by the Company can be
inspected at the offices of the National Association of Securities Dealers,
Inc., Reports Section, 1735 K Street, N.W., Washington, D.C. 20006.
 
     This Prospectus constitutes a part of a Registration Statement on Form S-3
(together with all amendments and exhibits thereto, the "Registration
Statement") filed with the Commission under the Securities Act of 1933, as
amended (the "Securities Act"), with respect to the Series A Preferred Shares.
This Prospectus does not contain all of the information set forth in such
Registration Statement, certain parts of which are omitted in accordance with
the rules and regulations of the Commission. Reference is made to the
Registration Statement and to the exhibits relating thereto for further
information with respect to the Company and the securities offered hereby. Any
statements contained herein concerning the provisions of any document filed as
an exhibit to the Registration Statement or otherwise filed with the Commission
or incorporated by reference herein are not necessarily complete, and, in each
instance, reference is made to the copy of such document so filed for a more
complete description of the matter involved. Each such statement is qualified in
its entirety by such reference.
                            ------------------------
 
                                        3
<PAGE>   5
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     The following documents filed with the Commission by the Company (File No.
0-14278) are incorporated by reference in this Prospectus:
 
          1. The Company's Annual Report on Form 10-K for the year ended June
     30, 1996;
 
          2. The Company's Proxy Statement dated September 27, 1996; and
 
          3. The Company's Quarterly Report on Form 10-Q for the quarter ended
     September 30, 1996.
 
     All documents filed by the Company pursuant to Sections 13(a), 13(c), 14,
or 15(d) of the Exchange Act subsequent to the date of this Prospectus and prior
to the termination of the offering of the securities offered hereby shall be
deemed to be incorporated by reference into this Prospectus and to be a part
hereof from the date of filing of such document. Any statement contained herein
or in a document all or a portion of which is incorporated or deemed
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
statement so modified or superseded shall not be deemed, except as so modified
or superseded, to constitute a part of this Prospectus.
 
     The Company hereby undertakes to provide without charge to each person to
whom this Prospectus has been delivered, upon the written or oral request of any
such person, a copy of any and all of the foregoing documents incorporated
herein by reference (other than exhibits to such documents which are not
specifically incorporated by reference into the information that this Prospectus
incorporates). Written or telephone requests should be directed to Investor
Relations Department, Microsoft Corporation, One Microsoft Way, Redmond,
Washington 98052-6399, telephone number (800) 285-7772 or by electronic mail at
[email protected].
 
   
     Microsoft, Natural, PowerPoint, Windows and Windows NT are registered
trademarks and BackOffice, FrontPage, MSN and Outlook are trademarks of
    
Microsoft Corporation.
 
                                        4
<PAGE>   6
 
                               PROSPECTUS SUMMARY
 
                                  THE COMPANY
 
     Microsoft Corporation (the "Company" or "Microsoft") was founded as a
partnership in 1975 and incorporated in 1981. Microsoft develops, manufactures,
licenses, sells, and supports a wide range of software products, including
operating systems for personal computers ("PCs") and servers; server
applications for client/server environments; business and consumer productivity
applications; software development tools; and Internet and intranet software and
technologies. The Company has recently expanded its interactive content efforts,
including MSN(TM), The Microsoft Network online service, various Internet-based
services, and entertainment and information software programs. Microsoft also
sells personal computer books and input devices and researches and develops
advanced technologies for future software products. Microsoft(R) products are
available for most 16-bit and 32-bit microprocessor-based PCs, including PCs
from AST Research, Acer, Apple, Compaq, Dell, Digital Equipment Corporation,
Fujitsu, Gateway 2000, Hewlett-Packard, International Business Machines (IBM),
NEC, Olivetti, Packard Bell, Siemens, Toshiba, and Vobis. The Company develops
most of its software products internally. Microsoft's business strategy
emphasizes the development of a broad line of PC and server software products
for business and personal use, marketed through multiple channels of
distribution.
 
     The Company is a Washington corporation and its principal executive offices
are located at One Microsoft Way, Redmond, Washington 98052-6399, its telephone
number is (206) 882-8080 and its electronic mail address is [email protected].
 
                                  THE OFFERING
 
SECURITIES.................       % Convertible Exchangeable Principal-Protected
                             Preferred Shares, Series A, par value $0.01 per
                             share (the "Series A Preferred Shares").
 
   
DIVIDENDS..................  Annual cumulative cash dividends of $          per
                             share, payable quarterly in arrears on
                                    ,       ,        , and                ,
                             commencing                , 1997.
    
 
   
AUTOMATIC CONVERSION.......  On                , 1999 (the "Conversion Date"),
                             unless previously exchanged for Convertible Notes,
                             as described below, each outstanding Series A
                             Preferred Share will automatically convert into
                             that number of Common Shares of the Company
                             determined by multiplying each Series A Preferred
                             Share by the Exchange Rate. However, in lieu of
                             delivering Common Shares on the Conversion Date,
                             the Company may, at its option, convert each Series
                             A Preferred Share into an amount of cash determined
                             by multiplying the Current Market Price of the
                             Common Shares by the Exchange Rate. In either
                             event, each holder of Series A Preferred Shares
                             will receive in cash any unpaid dividends which
                             have accrued to the Conversion Date.
    
 
   
                             The Exchange Rate is equal to (a) if the Current
                             Market Price of the Common Shares is greater than
                             or equal to $          per share (the "Threshold
                             Price"), a ratio equal to the Threshold Price
                             divided by the Current Market Price, (b) if the
                             Current Market Price is less than the Threshold
                             Price but greater than the Initial Price, a ratio
                             of 1.0, and (c) if the Current Market Price is less
                             than or equal to the Initial Price, a ratio equal
                             to the Initial Price divided by the Current Market
                             Price, subject in each case to adjustments in
                             certain events. Accordingly, holders of the Series
                             A
    
 
                                        5
<PAGE>   7
 
   
                             Preferred Shares will receive Common Shares or cash
                             having a value in no event less than the Initial
                             Price or more than the Threshold Price. The
                             "Initial Price" is $     per Common Share. The
                             "Current Market Price" means the average Closing
                             Price of the Common Shares on the 20 Trading Days
                             beginning on the twenty-second Trading Day
                             immediately prior to, but not including, the
                             Conversion Date and ending on the second Trading
                             Day immediately prior to, but not including, the
                             Conversion Date. Accordingly, because the price of
                             the Common Shares is subject to market
                             fluctuations, the value of the Common Shares
                             received by a holder of Series A Preferred Shares
                             upon automatic conversion of the Series A Preferred
                             Shares on the Conversion Date may be more or less
                             than the Current Market Price used to compute the
                             Exchange Rate.
    
 
ENHANCED DIVIDEND YIELD;
  PRINCIPAL PROTECTION;
  CAPPED EQUITY
  APPRECIATION.............  Holders of the Series A Preferred Shares will be
                             entitled to receive cumulative dividends at an
                             annual rate of $          per share, whereas the
                             Company has not paid cash dividends on the Common
                             Shares. If on the Conversion Date the Current
                             Market Price is less than the Initial Price,
                             holders of Series A Preferred Shares will receive
                             $          or the equivalent in Common Shares. The
                             opportunity for equity appreciation afforded by an
                             investment in the Series A Preferred Shares,
                             however, is capped at   %. Holders of the Series A
                             Preferred Shares will realize less than all of the
                             equity appreciation on the Common Shares if at the
                             Conversion Date the Current Market Price is above
                             the Threshold Price.
 
LIQUIDATION RIGHTS.........  In the event of any liquidation, dissolution or
                             winding up of the Company, whether voluntary or
                             involuntary, the holders of Series A Preferred
                             Shares are entitled to receive out of the assets of
                             the Company, before any payment is made or any
                             assets are distributed to holders of Common Shares
                             and of any other class of shares of the Company
                             ranking junior to the Series A Preferred Shares,
                             liquidating distributions in the amount of
                             $          per Series A Preferred Share plus
                             accrued and unpaid dividends, whether or not
                             declared, without interest.
 
   
EXCHANGEABILITY............  The Series A Preferred Shares are exchangeable, in
                             whole or in part, at the option of the Company, for
                             Convertible Notes on any dividend payment date
                             beginning on           , 1997 at the rate of
                             $          principal amount of Convertible Notes
                             for each Series A Preferred Share outstanding at
                             the time of exchange. The Company may effect such
                             exchange only if accrued and unpaid dividends on
                             the Series A Preferred Shares have been paid in
                             full. An exchange of less than all of the
                             outstanding Series A Preferred Shares is permitted
                             only if, immediately after giving effect to such
                             exchange, (i) the aggregate outstanding principal
                             amount of the Convertible Notes is not less than
                             $250,000,000, (ii) accrued and unpaid interest on
                             the outstanding Convertible Notes has been paid in
                             full and certain other requirements as specified in
                             the Indenture for the Convertible Notes have been
                             satisfied, and (iii)
    
 
                                        6
<PAGE>   8
 
   
                             the aggregate liquidating distribution amount for
                             the outstanding Series A Preferred Shares is not
                             less than $250,000,000. See "Description of
                             Convertible Notes." The exchange of Series A
                             Preferred Shares for the Convertible Notes will be
                             a taxable event and, therefore, may result in a tax
                             liability for the holder whose stock is exchanged
                             without any correlative cash payment to such
                             holder. See "Certain U.S. Federal Income Tax
                             Considerations -- Exchange of Series A Preferred
                             Shares for Convertible Notes or Cash Settlement at
                             Maturity -- Section 302 Issues."
    
 
VOTING RIGHTS..............  Holders of Series A Preferred Shares will have no
                             voting rights, except as required by law; provided
                             if (i) at any time the equivalent of six quarterly
                             dividends payable on the Series A Preferred Shares
                             are accrued and unpaid or (ii) the Company fails to
                             make any payment upon mandatory redemption of the
                             Series A Preferred Shares, the number of directors
                             of the Company will be increased by two and the
                             holders of all outstanding Series A Preferred
                             Shares, voting separately as a class, will be
                             entitled to elect the additional two directors to
                             serve until all dividends accrued and unpaid have
                             been paid or declared and funds set aside to
                             provide for payment in full or the Company fulfills
                             its mandatory redemption obligation, as the case
                             may be.
 
   
CONVERTIBLE NOTES..........  The Convertible Notes will be general, unsecured,
                             subordinated obligations of the Company, limited to
                             an aggregate principal amount equal to the
                             aggregate liquidation value of the Series A
                             Preferred Shares (excluding accrued and unpaid
                             dividends payable upon liquidation). It is expected
                             that the Convertible Notes, each in denominations
                             of $          , will be evidenced by one or more
                             global notes, in fully registered form without
                             coupons, deposited with a custodian for and
                             registered in the name of the Depository Trust
                             Company (the "Depositary") or a nominee of the
                             Depositary. See "Description of Convertible
                             Notes -- Book-Entry Only Issuance -- The Depository
                             Trust Company."
    
 
MATURITY DATE..............  The Convertible Notes will mature on December   ,
                             1999, which is the Conversion Date.
 
INTEREST; INTEREST PAYMENT
  DATES....................  The Convertible Notes will bear interest at the
                             rate of      % per annum from the date of issuance,
                             or from the most recent interest payment date to
                             which interest has been paid or provided for,
                             payable quarterly in arrears on           ,
                                       ,           and           of each year.
 
   
OPTIONAL CONVERSION........  At any time not more than 20 Trading Days nor fewer
                             than two Trading Days immediately prior to, but not
                             including, the Conversion Date, any holder of
                             Convertible Notes may elect (a "Conversion
                             Election"), by written notice to the Trustee, to
                             convert the Convertible Notes, on the Conversion
                             Date, into the right to receive the sum of (i) the
                             Conversion Amount (as defined below) payable at the
                             Company's option in either Common Shares or in
                             cash, plus (ii) the Additional Amount (as defined
                             below) payable in cash. Although the Convertible
                             Notes and the Series A Preferred Shares have
                             substantially the same economic provisions, the
                             consideration to be received upon maturity of the
                             Convertible
    
 
                                        7
<PAGE>   9
 
   
                             Notes may differ significantly from the
                             consideration to be received upon conversion of the
                             Series A Preferred Shares if the holder of
                             Convertible Notes fails to make a Conversion
                             Election. Any holder of a Convertible Note who does
                             not make a timely Conversion Election shall receive
                             on the Conversion Date, in lieu of the Conversion
                             Amount and the Additional Amount and in full
                             satisfaction of the holder's Convertible Notes,
                             $          in cash for each Convertible Note.
                             Accordingly, failure to make a timely Conversion
                             Election will result in the loss by the holder of
                             the difference, if any, between $          and the
                             Conversion Amount. The Company will mail written
                             notice of its election to pay the Conversion Amount
                             in either Common Shares or cash to each holder of
                             record of Convertible Notes not less than 30
                             Trading Days nor more than 45 Trading Days prior to
                             the Conversion Date and will include with such
                             notice a description of the procedure for making a
                             Conversion Election. The "Conversion Amount" means
                             an amount (payable in either Common Shares or cash)
                             for each Convertible Note equal to the Current
                             Market Price of Common Shares multiplied by the
                             product of (x) .995 and (y) the Convertible Note
                             Exchange Rate. The "Additional Amount" means an
                             amount (payable in cash) for each Convertible Note
                             equal to $          . The "Convertible Note
                             Exchange Rate" is equal to (a) if the Current
                             Market Price of the Common Shares is greater than
                             or equal to the Threshold Price, a ratio equal to
                             the Threshold Price divided by the Current Market
                             Price, (b) if the Current Market Price is less than
                             the Threshold Price but greater than the Initial
                             Price, a ratio of 1.0, and (c) if the Current
                             Market Price is less than or equal to the Initial
                             Price, a ratio equal to the Initial Price divided
                             by the Current Market Price, subject in each case
                             to adjustments in certain events.
    
 
RANKING....................  The indebtedness represented by the Convertible
                             Notes and the payment of the principal of and
                             interest on each and all of the Convertible Notes
                             are subordinate and subject in right of payment to
                             the prior payment in full of all Senior
                             Indebtedness. See "Description of Convertible
                             Notes -- Subordination."
 
REDEMPTION; SINKING FUND...  The Convertible Notes are subject to redemption
                             only on the Conversion Date. The Convertible Notes
                             do not contain sinking fund or other mandatory
                             redemption provisions.
 
   
NASDAQ TRADING
  SYMBOL FOR SERIES A
  PREFERRED SHARES.........  MSFTP
    
 
USE OF PROCEEDS............  For repurchase of Common Shares and general
                             corporate purposes. See "Use of Proceeds."
 
                                        8
<PAGE>   10
 
                                  RISK FACTORS
 
     Prospective purchasers of Series A Preferred Shares should carefully review
the information contained elsewhere in this Prospectus and should particularly
consider the following matters.
 

LIMITATIONS ON APPRECIATION TO OWNERS OF SERIES A PREFERRED SHARES

 
     The opportunity for equity appreciation afforded by an investment in the
Series A Preferred Shares is capped at      %. Holders of Series A Preferred
Shares will realize less than all of the equity appreciation on the Common
Shares if at the Conversion Date the Current Market Price of the Common Shares
is above the Threshold Price of $          per share. See "Description of Series
A Preferred Shares -- Conversion of Series A Preferred Shares", " -- Enhanced
Dividend Yield; Principal Protection; Capped Equity Appreciation."
 

CONSEQUENCES OF HOLDER'S FAILURE TO GIVE TIMELY ELECTION NOTICE PRIOR TO
MATURITY OF CONVERTIBLE NOTES

 
     If the Company elects to exchange the Series A Preferred Shares for
Convertible Notes, then any holder of Convertible Notes who fails to make a
timely Conversion Election by written notice to the Trustee not more than 20
Trading Days nor fewer than two Trading Days prior to, but not including, the
Conversion Date, will not receive any increase on his or her original investment
that might otherwise be payable. Rather the holder will only receive, in full
satisfaction of the holder's Convertible Notes, an amount equal to his or her
initial investment. See "Description of Convertible Notes -- Optional Conversion
on Maturity of Convertible Notes."
 

TAX CONSEQUENCES OF EXCHANGE OF SERIES A PREFERRED SHARES FOR CONVERTIBLE NOTES
OR CASH SETTLEMENT AT MATURITY

 
   
     Exchange of Series A Preferred Shares for Convertible Notes or settlement
at maturity for cash will be a taxable event to the affected shareholders. Such
an exchange or settlement may be effected in the sole discretion of the Company.
Although it is anticipated that in most instances such exchange or settlement
will result in capital gain or loss, under certain circumstances (depending in
part on the extent of a holder's interests in Common Shares, including options
to acquire such shares) the amount received may constitute dividend income to
the affected shareholder. In addition, the exchange of the Series A Preferred
Shares for the Convertible Notes will be a taxable event, potentially resulting
in a tax liability for the holder whose Series A Preferred Shares are exchanged
without any correlative cash payment for such holder. See "Certain U.S. Federal
Income Tax Considerations -- Exchange of Series A Preferred Shares for
Convertible Notes or Cash Settlement at Maturity -- Section 302 Issues."
    
 

LACK OF ESTABLISHED MARKET FOR SERIES A PREFERRED SHARES

 
   
     There is currently no public market for the Series A Preferred Shares.
Although the Series A Preferred Shares have been approved for quotation on the
Nasdaq National Market, there can be no assurance that an active market for the
Series A Preferred Shares will develop. Future trading prices for the Series A
Preferred Shares will depend on many factors, including the Company's operating
results, the trading price of the Common Shares, the market for securities
similar to the Series A Preferred Shares and the volume of trading activity in
the Series A Preferred Shares.
    
 

RISKS AND UNCERTAINTIES REGARDING FORWARD-LOOKING STATEMENTS

 
     This Prospectus contains and incorporates certain statements which may be
viewed as forward-looking statements that involve risks and uncertainties. These
forward-looking statements, such as the information contained in the Company's
Annual Report to Shareholders for the year ended June 30, 1996 (the "Annual
Report") under the caption "Management's Discussion and Analysis of Financial
Condition and Results of Operations," are only predictions; actual events or
results may differ materially as a result of risks facing the Company. Some of
these risks are
 
                                        9
<PAGE>   11
 
discussed in the "Outlook: Issues and Uncertainties" section of "Management's
Discussion and Analysis of Financial Condition and Results of Operations" in the
Annual Report beginning at page 22 and include rapid technological changes,
personal computer shipment levels, software pricing changes, delays in
new-product releases, lack of customer acceptance for new products, market
saturation, slower growth rates, changes in product and distribution mix, and
difficulties in defending and securing intellectual property rights for the
Company's products.
 
                                USE OF PROCEEDS
 
     The net proceeds to be received by the Company from this offering are
expected to be used for repurchase of Common Shares, consistent with the
Company's previously announced strategy to repurchase its Common Shares for
issuance under the Company's employee stock option and stock purchase plans. Net
proceeds may also be used for other general corporate purposes.
 
                                       10
<PAGE>   12
 
                            SELECTED FINANCIAL DATA
 
     The following table sets forth certain selected financial data for the
Company as of and for each of the five fiscal years in the period ended June 30,
1996, which was derived from the Company's financial statements and notes
thereto. The financial statements as of and for each of the three years in the
period ended June 30, 1996 have been audited by Deloitte & Touche LLP, the
Company's independent auditors, as stated therein in their report which is
incorporated by reference herein. The table also sets forth certain selected
financial data for the Company as of September 30, 1996 and for the three months
ended September 30, 1996 and 1995, which was derived from unaudited financial
statements of the Company, which in the opinion of the Company include all
adjustments necessary for the fair presentation of the Company's financial
position and results of operations for such periods, and may not be indicative
of the results of operations for a full year. All per share data below reflects
the two-for-one split of the Common Shares effective November 22, 1996.
 
<TABLE>
<CAPTION>
                                                                              THREE MONTHS ENDED
                                            YEAR ENDED JUNE 30,                 SEPTEMBER 30,
                                 ------------------------------------------   ------------------
                                  1992     1993     1994     1995     1996     1995       1996
                                 ------   ------   ------   ------   ------   ------     -------
                                         (IN MILLIONS, EXCEPT PER SHARE AND RATIO DATA)
<S>                              <C>      <C>      <C>      <C>      <C>      <C>        <C>
INCOME STATEMENTS DATA
Net revenues...................  $2,759   $3,753   $4,649   $5,937   $8,671   $2,016      $2,295
Net income.....................     708      953    1,146    1,453    2,195      499         614
Earnings per share.............    0.60     0.79     0.94     1.16     1.71     0.39        0.47
Return on net revenues.........    25.7%    25.4%    24.7%    24.5%    25.3%    24.8%       26.8%
</TABLE>
 
<TABLE>
<CAPTION>
                                                 JUNE 30,
                                -------------------------------------------     SEPTEMBER 30,
                                 1992     1993     1994     1995     1996            1996
                                ------   ------   ------   ------   -------   ------------------
                                                         (IN MILLIONS)
<S>                             <C>      <C>      <C>      <C>      <C>       <C>        <C>
BALANCE SHEETS DATA
Cash and short-term
  investments.................  $1,345   $2,290   $3,614   $4,750   $ 6,940        $ 7,098
Total assets..................   2,640    3,805    5,363    7,210    10,093         10,740
Stockholders' equity..........   2,193    3,242    4,450    5,333     6,908         7,277
</TABLE>
 
<TABLE>
<CAPTION>
                                                 JUNE 30,
                                -------------------------------------------     SEPTEMBER 30,
                                 1992     1993     1994     1995     1996            1996
                                ------   ------   ------   ------   -------   ------------------
<S>                             <C>      <C>      <C>      <C>      <C>       <C>        <C>
OTHER DATA
Ratio of earnings to fixed
  charges(1)..................    *        *        *        *         *              *
</TABLE>
 
- ---------------
 *  Not meaningful
 
(1) The Company had no material debt and, consequently, had no material fixed
    charges for each of the periods presented. The ratio of earnings to fixed
    charges is determined by dividing earnings by fixed charges. Fixed charges
    consist of the total of (i) interest, whether expensed or capitalized; (ii)
    amortization of debt expense and discount or premium relating to any
    indebtedness, whether expensed or capitalized; (iii) such portion of rental
    expense as can be demonstrated to be representative of the interest factor
    in the particular case; and (iv) preferred share dividend requirements of
    majority-owned subsidiaries and fifty-percent-owned persons, excluding in
    all cases items which would be or are eliminated in consolidation. Earnings
    consist of pretax income from continuing operations plus the amount of fixed
    charges, adjusted to exclude (i) the amount of any interest capitalized
    during the period and (ii) the actual amount of any preferred share dividend
    requirements of majority-owned subsidiaries and fifty-percent-owned persons
    which were included in such fixed charges amount but not deducted in the
    determination of pretax income. The ratio of earnings to fixed charges is
    not meaningful for periods in which there were no material fixed charges.
 
                                       11
<PAGE>   13
 
                                    BUSINESS
 
     Microsoft was founded as a partnership in 1975 and incorporated in 1981.
Microsoft develops, manufactures, licenses, sells, and supports a wide range of
software products, including operating systems for personal computers ("PCs")
and servers; server applications for client/server environments; business and
consumer productivity applications; software development tools; and Internet and
intranet software and technologies. The Company has recently expanded its
interactive content efforts, including MSN(TM), The Microsoft Network online
service, various Internet-based services, and entertainment and information
software programs. Microsoft also sells personal computer books and input
devices and researches and develops advanced technologies for future software
products. Microsoft(R) products are available for most 16-bit and 32-bit
microprocessor-based PCs, including PCs from AST Research, Acer, Apple, Compaq,
Dell, Digital Equipment Corporation, Fujitsu, Gateway 2000, Hewlett-Packard,
International Business Machines (IBM), NEC, Olivetti, Packard Bell, Siemens,
Toshiba, and Vobis. The Company develops most of its software products
internally. Microsoft's business strategy emphasizes the development of a broad
line of PC and server software products for business and personal use, marketed
through multiple channels of distribution. Microsoft classifies its products
into two categories: (i) platforms, and (ii) applications and content.
 
     Platform products include desktop operating systems, business systems,
consumer platforms, Internet platforms, and tools. Desktop operating systems for
PCs include Windows(R) 95 and Windows NT(R) Workstation operating systems.
Business systems include Windows NT Server operating system and Microsoft
BackOffice(TM) suite of Windows NT-based server applications. Consumer platforms
products include system software for non-PC devices, integrated software systems
for public networks, and software for the creation of content for digital media
productions. The Company also offers software development tools, Internet
browser technology, and other Internet and intranet software products and
technologies.
 
     Applications and content products include productivity applications,
interactive entertainment and information products, PC input devices and desktop
finance products. Business productivity applications and products are designed
for the business, home, school, and small business markets. The primary products
are Microsoft Office, an integrated suite of applications including Microsoft
Excel spreadsheet, Microsoft Word word processor, and Microsoft PowerPoint(R)
presentation graphics program, and Microsoft Office Professional, which includes
the foregoing applications plus Microsoft Access database management program.
Other productivity applications include Microsoft Schedule+ calendar and
scheduling program, Microsoft Outlook(TM) desktop manager, Microsoft Publisher
desktop publishing program, Microsoft Project critical path project scheduling
program and Microsoft FrontPage(TM) Web authoring and management tool for
Internet and intranet sites. Interactive products include childrens' titles,
games, information products, and MSN. PC input devices include Microsoft Mouse,
Microsoft Natural(R) Keyboard, and a joystick. The primary desktop finance
product is Microsoft Money.
 
   
     To further its efforts in developing interactive content, Microsoft and the
National Broadcasting Company (NBC) recently established two joint ventures: a
24-hour cable news and information channel, MSNBC Cable LLC, and an interactive
online news and information service, MSNBC Interactive News LLC.
    
 
     The Company's sales and support operation builds long-term business
relationships with three primary customer types: original equipment
manufacturers ("OEMs"), end-users, and organizations. Microsoft manages the
channels that serve customers by working with OEMs, distributors, and resellers.
The Company also focuses directly on large enterprises, offering tailored
license programs, enterprisewide support, consulting services, and other
specialized services. In addition to the OEM channel, Microsoft has three major
geographic sales organizations: U.S. and Canada, Europe, and Other
International. The Company supports its products with technical support for end-
users, developers, and organizations.
 
                                       12
<PAGE>   14
 
                         DESCRIPTION OF CAPITAL SHARES
 
     The Company has two classes of authorized shares, common shares and
preferred shares. As of November 22, 1996, the Company's authorized capital
shares consisted of 4,000,000,000 common shares, par value $.000025 per share
(the "Common Shares"), of which 1,197,838,640 shares were outstanding. In
addition, as of November 22, 1996, there were 100,000,000 preferred shares, par
value $0.01 per share ("Preferred Shares"), of which none were outstanding. In
the event of certain significant transactions, holders of capital shares of the
Company have all rights available under the Washington Business Corporation Act,
including but not limited to, dissenter's rights.
 
COMMON SHARES
 
     Holders of Common Shares are entitled to receive such dividends as may be
declared from time to time by the Board of Directors, and legally available from
the Company's assets, although none have been declared to date. In addition,
upon any liquidation of the Company, holders of Common Shares are entitled to a
pro rata share of all Company assets available for distribution to shareholders.
Each Common Share is entitled to one vote on all matters voted on by the
shareholders.
 
     Holders of Common Shares have no preemptive rights to acquire additional
shares or securities convertible into Common Shares. In addition, holders of
Common Shares do not have the right to cumulate votes in the election of
directors.
 
PREFERRED SHARES
 
     The Company's Board of Directors is authorized, without shareholder action,
to provide for the issuance of Preferred Shares in one or more series not
exceeding the aggregate number of authorized Preferred Shares. The Board of
Directors is also authorized to determine: (i) the voting powers, if any, of
Preferred Shares; (ii) the rate of dividend, if any, for Preferred Shares; (iii)
the rights of holders of Preferred Shares of any series in the event of
liquidation, dissolution, or winding up of the affairs of the Company; (iv)
whether or not a series of Preferred Shares is redeemable, and if so, the terms
and conditions of such redemption; and (v) whether a series of Preferred Shares
is redeemable pursuant to a retirement, sinking fund, or otherwise, and the
terms and conditions of such obligation.
 
                    DESCRIPTION OF SERIES A PREFERRED SHARES
 
     The following is a summary of the terms of the   % Convertible Exchangeable
Principal-Protected Preferred Shares, Series A, par value $0.01 per share (the
"Series A Preferred Shares") offered hereby. This summary is not intended to be
complete and is subject to and qualified in its entirety by reference to the
Company's Restated Articles of Incorporation (the "Articles of Incorporation")
to be filed with the Secretary of State of the State of Washington amending and
restating the Company's existing Restated Articles of Incorporation. The form of
the Articles of Incorporation as proposed to be filed is an exhibit to the
Registration Statement of which this Prospectus is a part.
 
GENERAL
 
     The Articles of Incorporation authorize the issuance of up to 100,000,000
Preferred Shares and the Board of Directors will determine the relative rights,
conversion rights, voting rights, exchange features and liquidation preferences
of any series of Preferred Shares of the Company. The Series A Preferred Shares
constitute a series of the Preferred Shares. See "Description of Capital
Shares."
 
                                       13
<PAGE>   15
 
     The Series A Preferred Shares, when issued and sold for the consideration
herein contemplated, will be duly and validly issued, fully paid and
nonassessable, and the holders thereof will have no preemptive rights in
connection therewith. The Series A Preferred Shares will not be subject to any
sinking fund. The Articles of Incorporation will not prohibit the reissuance of
Series A Preferred Shares reacquired (by purchase, conversion, exchange or
otherwise) by the Company.
 
DIVIDENDS
 
     Holders of Series A Preferred Shares will be entitled to receive, when, as
and if declared by the Board of Directors, out of funds of the Company legally
available therefor, cash dividends at the annual rate of $          per share,
payable quarterly in arrears on             ,             ,             and
            , commencing             , 1997 (and, in the case of any accrued but
unpaid dividends, at such additional times and for such interim periods, if any,
as determined by the Company's Board of Directors). Dividends on the Series A
Preferred Shares will be cumulative and will accrue without interest from the
date of original issuance, and will be payable to holders of record as they
appear on the share transfer records of the Company on such record dates, which
shall be not more than 60 days nor less than 10 days preceding the payment
dates, as shall be fixed by the Board of Directors. Dividends will cease to
accrue in respect of Series A Preferred Shares on the Conversion Date (as
defined below) or on the date of earlier exchange for Convertible Notes (as
defined below). Dividends payable on the Series A Preferred Shares for any
period shorter than a full dividend period will be computed on the basis of a
360-day year consisting of twelve 30-day months.
 
     So long as any Series A Preferred Shares are outstanding, the Company may
not (a) declare or pay any dividends (other than dividends payable in Common
Shares or other shares of the Company ranking junior to the Series A Preferred
Shares) to holders of Common Shares or shares of the Company of any other class
ranking on a parity with or junior to the Series A Preferred Shares, or (b) make
any distributions of assets (directly or indirectly, by purchase, redemption or
otherwise) to the holders of Common Shares or shares of the Company of any other
class ranking on a parity with or junior to the Series A Preferred Shares,
unless all accrued and unpaid dividends on the Series A Preferred Shares,
including the full dividends for the then current quarterly dividend period,
shall have been paid or declared and funds sufficient for payment thereof set
apart.
 
     No dividends may be paid upon or declared or set apart for any Preferred
Shares ranking on a parity with the Series A Preferred Shares for any quarterly
dividend period, unless at the same time a like proportionate dividend for the
same quarterly dividend period, ratably in proportion to the respective annual
dividend rates fixed therefor, shall be paid upon or declared or set apart for
the Series A Preferred Shares.
 
   
CONVERSION OF SERIES A PREFERRED SHARES
    
 
   
     On             , 1999 (the "Conversion Date"), unless previously exchanged
for Convertible Notes, as described below, each outstanding Series A Preferred
Share will automatically convert into that number of Common Shares of the
Company determined by multiplying each Series A Preferred Share by the Exchange
Rate. However, in lieu of delivering Common Shares on the Conversion Date, the
Company may, at its option, convert each Series A Preferred Share into an amount
of cash (a "Cash Settlement") determined by multiplying the Current Market Price
of the Common Shares by the Exchange Rate. In either event, each holder of
Series A Preferred Shares will receive in cash any unpaid dividends which have
accrued to the Conversion Date. The Exchange Rate is equal to (a) if the Current
Market Price of the Common Shares is greater than or equal to $          per
share (the "Threshold Price"), a ratio equal to the Threshold Price divided by
the Current Market Price, (b) if the Current Market Price is less than the
Threshold Price but greater than the Initial Price, a ratio of 1.0, and (c) if
the Current Market Price is less than or equal to the Initial Price, a ratio
equal to the Initial Price divided by the Current Market Price, subject in each
case to adjustments in certain events. Accordingly, holders of the Series A
Preferred Shares will receive
    
 
                                       14
<PAGE>   16
 
   
Common Shares or cash having a value in no event less than the Initial Price or
more than the Threshold Price.
    
 
     The "Initial Price" is $          per Common Share. The "Current Market
Price" means the average Closing Price for the Common Shares on the 20 Trading
Days beginning on the twenty-second Trading Day immediately prior to, but not
including, the Conversion Date and ending on the second Trading Day immediately
prior to, but not including, the Conversion Date. The "Closing Price" of a
Common Share on any date of determination means the closing sale price (or, if
no closing price is reported, the last reported sale price) of such share as
reported by the Nasdaq National Market on such date, or, if it is not so
reported, as reported in the composite transactions for the principal United
States securities exchange on which the Common Shares are so listed, or, if they
are not so listed on a United States national or regional securities exchange,
the last quoted bid price of the Common Shares in the over-the-counter market as
reported by the National Quotation Bureau or similar organization, or, if such
bid price is not available, the market value of a Common Share on such date as
determined by a nationally recognized independent investment banking firm
retained for this purpose by the Company. A "Trading Day" is defined as a day on
which the Common Shares (a) are not suspended from trading on any national or
regional securities exchange or association or over-the-counter market at the
close of business and (b) have traded at least once on the national or regional
securities exchange or association or over-the-counter market that is the
primary market for the trading of such security.
 
     Because the price of the Common Shares is subject to market fluctuations,
the value of the Common Shares received by a holder of Series A Preferred Shares
upon automatic conversion of the Series A Preferred Shares on the Conversion
Date may be more or less than the Current Market Price used to compute the
Exchange Rate.
 
     The Company will mail written notice of its election to settle the
conversion of the Series A Preferred Shares in cash to each holder of record of
Series A Preferred Shares not less than 30 Trading Days nor more than 45 Trading
Days prior to the Conversion Date.
 
     Upon surrender of certificates for Series A Preferred Shares to be
converted, as required in the Articles of Incorporation (except in the case of a
Cash Settlement), the Company will issue the number of full Common Shares
issuable upon conversion thereof. No fractional Common Shares will be issued
upon conversion, but in lieu thereof, in the sole discretion of the Board of
Directors, either such fractional interest shall be rounded up to the next whole
share or an amount will be paid in cash by the Company for such fractional
interest based upon the Current Market Price.
 
CONVERSION ADJUSTMENTS
 
     The Exchange Rate or Convertible Note Exchange Rate (as defined below), as
applicable, is subject to adjustment as appropriate in certain circumstances,
including if the Company (a) pays a share dividend or makes a distribution with
respect to its Common Shares in Common Shares, (b) subdivides or splits its
outstanding Common Shares, (c) combines its outstanding Common Shares into a
smaller number of shares, (d) issues by reclassification of its Common Shares
any capital shares of the Company, (e) issues certain rights or warrants to all
holders of its Common Shares or (f) pays a dividend of or distributes to all
holders of its Common Shares evidences of its indebtedness or other assets
(including capital shares of the Company but excluding any cash dividends or
distributions and dividends referred to in clause (a) above). In addition, the
Company will be entitled to make such upward adjustments in the Exchange Rate or
Convertible Note Exchange Rate, as applicable, as the Company, in its
discretion, determines to be advisable, in order that any share dividend,
subdivision of shares, distribution of rights to purchase shares or securities,
or distribution of securities convertible into or exchangeable for shares (or
any transaction which could be treated as any of the foregoing transactions
pursuant to Section 305 of the Internal Revenue Code of 1986, as amended)
hereafter made by the Company will not be taxable to its shareholders. All
adjustments to the Exchange Rate or Convertible Note Exchange Rate, as
 
                                       15
<PAGE>   17
 
applicable, will be calculated to the nearest 1/10,000th of a Common Share. No
adjustment in the Exchange Rate or Convertible Note Exchange Rate, as
applicable, will be required unless such adjustment would require an increase or
decrease of at least one percent in the Exchange Rate or Convertible Note
Exchange Rate, as applicable, provided that any adjustments which, by reason of
the foregoing, are not required to be made shall be carried forward and taken
into account in any subsequent adjustment. All adjustments will be made
successively.
 
     Whenever the Exchange Rate or Convertible Note Exchange Rate, as
applicable, is adjusted as provided in the preceding paragraph, the Company will
file with the Transfer Agent for the Series A Preferred Shares and the Trustee
for the Convertible Notes, as applicable, a certificate with respect to such
adjustment, make a prompt public announcement thereof and mail a notice to
holders of the Series A Preferred Shares and Convertible Notes, as applicable,
providing specified information with respect to such adjustment.
 
   
     The Company will reserve and at all times keep available, free from
preemptive rights, out of its authorized but unissued shares, for the purpose of
effecting the conversion of the Series A Preferred Shares, such number of its
duly authorized Common Shares as will from time to time be sufficient to effect
the conversion of all outstanding Series A Preferred Shares; provided, however,
that the Company shall not be obligated to keep such shares available with
respect to any Series A Preferred Shares during any time that the conversion of
such Series A Preferred Shares is prohibited under a contract or other agreement
between the holder of such Series A Preferred Shares and the Company.
    
 
ADJUSTMENT FOR CERTAIN CONSOLIDATIONS OR MERGERS
 
     In case of any consolidation or merger to which the Company is a party
(other than a merger or consolidation in which the Company is the continuing
corporation and in which the Common Shares outstanding immediately prior to the
merger or consolidation remain unchanged), or in case of any sale or transfer to
another entity of the property of the Company as an entirety or substantially as
an entirety, or in case of any statutory share exchange with another entity
(other than in connection with an acquisition in which the Common Shares
outstanding immediately prior to the share exchange remain unchanged), each
Series A Preferred Share shall, after consummation of such transaction, be
subject to (i) conversion at the option of the holder into the kind and amount
of securities, cash, or other property receivable upon consummation of such
transaction by a holder of the number of Common Shares into which such Series A
Preferred Shares might have been converted immediately prior to consummation of
such transaction and (ii) conversion on the Conversion Date into the kind and
amount of securities, cash, or other property receivable upon consummation of
such transaction by a holder of the number of Common Shares into which such
Series A Preferred Share would have been converted if the conversion on the
Conversion Date had occurred immediately prior to the date of consummation of
such transaction assuming in each case that such holder of Common Shares failed
to exercise rights of election, if any, as to the kind or amount of securities,
cash, or other property receivable upon consummation of such transaction
(provided that if the kind or amount of securities, cash, or other property
receivable upon consummation of such transaction is not the same for each
nonelecting share, then the kind and amount of securities, cash, or other
property receivable upon consummation of such transaction for each nonelecting
share shall be deemed to be the kind and amount so receivable per share by a
plurality of the nonelecting shares). The kind and amount of securities into
which the Series A Preferred Shares shall be convertible after consummation of
such transaction shall be subject to adjustment as described above under the
caption "Conversion Adjustments" following the date of consummation of such
transaction. The Company may not become a party to any such transaction unless
the terms thereof are consistent with the foregoing.
 
                                       16
<PAGE>   18
 
ENHANCED DIVIDEND YIELD; PRINCIPAL PROTECTION; CAPPED EQUITY APPRECIATION
 
     Holders of the Series A Preferred Shares will be entitled to receive
cumulative dividends at an annual rate of $          per share, whereas the
Company has not paid cash dividends on the Common Shares. If on the Conversion
Date the Current Market Price is less than the Initial Price, holders of Series
A Preferred Shares will receive $          or the equivalent in Common Shares.
The opportunity for equity appreciation afforded by an investment in the Series
A Preferred Shares, however, is capped at    %. Holders of the Series A
Preferred Shares will realize less than all of the equity appreciation on the
Common Shares if at the Conversion Date the Current Market Price is above the
Threshold Price.
 
LIQUIDATION RIGHTS
 
   
     In the event of any liquidation, dissolution or winding up of the Company,
whether voluntary or involuntary, the holders of Series A Preferred Shares are
entitled to receive out of the assets of the Company, whether such assets are
stated capital or surplus of any nature, before any payment is made or any
assets are distributed to holders of Common Shares and of any other class of
shares of the Company ranking junior to the Series A Preferred Shares,
liquidating distributions in the amount of $          per Series A Preferred
Share plus accrued and unpaid dividends, whether or not declared, without
interest. If upon any liquidation, dissolution or winding up of the Company, the
amounts payable with respect to the Series A Preferred Shares and any other
preferred shares ranking as to any such distribution on a parity with the Series
A Preferred Shares are not paid in full, the holders of the Series A Preferred
Shares and of such other preferred shares will share ratably in any such
distribution of assets in proportion to the full respective preferential amounts
to which they are entitled. After payment of the full amount of the liquidating
distribution to which they are entitled, the holders of Series A Preferred
Shares will not be entitled to any further participation in any distribution of
assets by the Company. Neither a consolidation or merger of the Company with
another corporation nor a sale or transfer of all or part of the Company's
assets for cash, securities or other property will be considered a liquidation,
dissolution or winding up of the Company for these purposes.
    
 
EXCHANGEABILITY
 
   
     The Series A Preferred Shares are exchangeable, in whole or in part, at the
option of the Company, for Convertible Notes on any dividend payment date
beginning on               , 1997 at the rate of $          principal amount of
Convertible Notes for each Series A Preferred Share outstanding at the time of
exchange. The Company may effect such exchange only if accrued and unpaid
dividends on the Series A Preferred Shares have been paid in full. An exchange
of less than all of the outstanding Series A Preferred Shares is permitted only
if, immediately after giving effect to such exchange, (i) the aggregate
outstanding principal amount of the Convertible Notes is not less than
$250,000,000, (ii) accrued and unpaid interest on the outstanding Convertible
Notes has been paid in full and certain other requirements as specified in the
Indenture for the Convertible Notes have been satisfied, and (iii) the aggregate
liquidating distribution amount for the outstanding Series A Preferred Shares is
not less than $250,000,000. See "Description of Convertible Notes." The Company
will mail written notice of its intention to exchange to each holder of record
of Series A Preferred Shares not less than 30 Trading Days or more than 45
Trading Days prior to the date fixed for exchange.
    
 
     Upon the date fixed for exchange of Series A Preferred Shares for
Convertible Notes (the "Exchange Date"), if the Company has taken all action
required to authorize the issuance of the Convertible Notes in exchange for the
Series A Preferred Shares, the Series A Preferred Shares so exchanged will no
longer be deemed outstanding and all rights relating to such shares will
terminate, except only the right to receive dividends accrued and unpaid to and
including the Exchange Date and the right to receive the Convertible Notes upon
surrender of certificates representing the Series A Preferred Shares. The
exchange of Series A Preferred Shares for the Convertible Notes will be a
 
                                       17
<PAGE>   19
 
taxable event and, therefore, may result in tax liability for the holder whose
stock is exchanged without any correlative cash payment to such holder. See
"Certain U.S. Federal Income Tax Considerations -- Exchange of Series A
Preferred Shares for Convertible Notes or Cash Settlement at Maturity -- Section
302 Issues."
 
VOTING RIGHTS
 
     Except as indicated below or otherwise required by law, holders of Series A
Preferred Shares will have no voting rights. If (i) at any time the equivalent
of six quarterly dividends payable on the Series A Preferred Shares are accrued
and unpaid or (ii) the Company fails to make any payment upon mandatory
redemption of the Series A Preferred Shares, the number of directors of the
Company will be increased by two and the holders of all outstanding Series A
Preferred Shares, voting separately as a class, will be entitled to elect the
additional two directors to serve until all dividends accrued and unpaid have
been paid or declared and funds set aside to provide for payment in full or the
Company fulfills its mandatory redemption obligation, as the case may be.
 
     In addition, without the vote or consent of the holders of at least
two-thirds of the Series A Preferred Shares then outstanding, the Company may
not (a) create or issue or increase the authorized number of shares of any class
or series of shares ranking prior to the Series A Preferred Shares either as to
dividends or upon liquidation, dissolution or winding up, or any security
convertible into or exercisable or exchangeable for such shares, (b) purchase or
redeem less than all of the Series A Preferred Shares then outstanding when any
dividends on the Series A Preferred Shares are in arrears, or (c) amend, alter
or repeal any of the provisions of the Articles of Incorporation so as to affect
any rights, preferences, privileges or voting power of the Series A Preferred
Shares or the holders thereof; provided, however, that any increase in the
amount of authorized Preferred Shares or the creation and issuance of any other
class of Preferred Shares, or any increase in the amount of authorized shares of
such class or of any other class of Preferred Shares, in each case ranking on a
parity with or junior to the Series A Preferred Shares with respect to the
payment of dividends and the distribution of assets upon liquidation,
dissolution or winding up, will not be deemed to affect such rights,
preferences, privileges or voting powers.
 
TRANSFER AGENT AND REGISTRAR
 
     ChaseMellon Shareholder Services (the "Transfer Agent") will act as the
agent for payment, redemption, transfer, conversion and exchange, and as
registrar, for the Series A Preferred Shares.
 
                        DESCRIPTION OF CONVERTIBLE NOTES
 
GENERAL
 
   
     If the Company elects to exchange Series A Preferred Shares for Convertible
Notes, the Company will issue Convertible Notes under an Indenture (the
"Indenture") to be entered into between the Company and Citibank, N.A. (together
with any successor trustee, the "Trustee"). Convertible Notes will be issued at
a rate of $          principal amount of the Convertible Notes for each Series A
Preferred Share so exchanged. The Company may effect such exchange only if
accrued and unpaid dividends on Series A Preferred Shares have been paid in
full. An exchange of less than all of the outstanding Series A Preferred Shares
is permitted only if, immediately after giving effect to such exchange, (i) the
aggregate outstanding principal amount of the Convertible Notes is not less than
$250,000,000, (ii) accrued and unpaid interest on the outstanding Convertible
Notes has been paid in full and certain other requirements as specified in the
Indenture have been satisfied, and (iii) the aggregate liquidating distribution
amount for the outstanding Series A Preferred Shares is not less than
$250,000,000. The Company will mail written notice of its intention to exchange
to each holder of record of Series A Preferred Shares not less than 30 Trading
Days nor more than 45 Trading Days prior to the date fixed for exchange. The
following descriptions of
    
 
                                       18
<PAGE>   20
 
   
certain provisions of the Indenture and the Convertible Notes are intended as
summaries only and are qualified in their entirety by reference to the Indenture
and the Convertible Notes, including the definitions in those documents of
certain terms. Whenever particular defined terms of the Indenture or the
Convertible Notes are referred to, it is intended that those defined terms are
to be incorporated by reference into this Prospectus. References to sections of
the Indenture are included in parenthesis in the following discussion. The
Indenture, including a form of the Convertible Notes, will be substantially in
the form filed as an exhibit to the Registration Statement of which this
Prospectus is a part.
    
 
     The Convertible Notes will be general, unsecured, subordinated obligations
of the Company, limited to an aggregate principal amount equal to the aggregate
liquidation value of the Series A Preferred Shares (excluding accrued and unpaid
dividends payable upon liquidation) and will mature on               , 1999,
which is the Conversion Date. It is expected that the Convertible Notes, each in
denominations of $          , will be evidenced by one or more global notes, in
fully registered form without coupons, deposited with a custodian for and
registered in the name of a nominee of the Depository Trust Company. See
"-- Book-Entry Only Issuance -- The Depository Trust Company" below. It is
expected that the Convertible Notes will be quoted on the Nasdaq National
Market.
 
INTEREST
 
   
     The Convertible Notes will bear interest at the rate of   % per annum from
the date of issuance, or from the most recent interest payment date to which
interest has been paid or provided for, payable quarterly in arrears on
            ,             ,             and             of each year to the
person in whose name the Convertible Notes are registered at the close of
business on the preceding             ,             ,             and
            , as the case may be. Interest will be computed on the basis of a
360-day year consisting of twelve 30-day months. Principal of and interest on
the Convertible Notes will be payable, and the transfer of Convertible Notes
will be registrable, at the office or agency of the Company maintained for that
purpose in The City of New York, New York. In addition, payment of interest may,
at the option of the Company, be made by check mailed to the address of the
person entitled thereto as it appears in the register of holders of Convertible
Notes.
    
 
OPTIONAL CONVERSION ON MATURITY OF CONVERTIBLE NOTES
 
   
     At any time not more than 20 Trading Days nor fewer than two Trading Days
immediately prior to, but not including, the Conversion Date, any holder of
Convertible Notes may elect (a "Conversion Election"), by written notice to the
Trustee, to convert the Convertible Notes, on the Conversion Date, into the
right to receive the sum of (i) the Conversion Amount (as defined below) payable
at the Company's option in either Common Shares or in cash, plus (ii) the
Additional Amount (as defined below) payable in cash. Although the Convertible
Notes and the Series A Preferred Shares have substantially the same economic
provisions, the consideration to be received upon maturity of the Convertible
Notes may differ significantly from the consideration to be received upon
conversion of the Series A Preferred Shares if the holder of Convertible Notes
fails to make a Conversion Election. Any holder of a Convertible Note who does
not make a timely Conversion Election shall receive on the Conversion Date, in
lieu of the Conversion Amount and the Additional Amount and in full satisfaction
of the holder's Convertible Notes, $          in cash for each Convertible Note.
Accordingly, failure to make a timely Conversion Election will result in the
loss by the holder of the difference, if any, between $          and the
Conversion Amount. The "Conversion Amount" means an amount (payable in either
Common Shares or cash) for each Convertible Note equal to the Current Market
Price of Common Shares multiplied by the product of (x) .995 and (y) the
Convertible Note Exchange Rate. The "Additional Amount" means an amount (payable
in cash) for each Convertible Note equal to $          . The "Convertible Note
Exchange Rate" is equal to (a) if the Current Market Price of the Common Shares
is greater than or equal to the
    
 
                                       19
<PAGE>   21
 
   
Threshold Price, a ratio equal to the Threshold Price divided by the Current
Market Price, (b) if the Current Market Price is less than the Threshold Price
but greater than the Initial Price, a ratio of 1.0, and (c) if the Current
Market Price is less than or equal to the Initial Price, a ratio equal to the
Initial Price divided by the Current Market Price, subject in each case to
adjustments in certain events. The Series A Preferred Shares and the Convertible
Notes have been structured in this fashion to enhance the likelihood that the
exchange of the Convertible Notes for the Series A Preferred Shares will qualify
for exchange treatment rather than treatment as dividend income. See "Certain
U.S. Federal Income Tax Considerations -- Cash Settlement of Convertible Notes
at Maturity" and "-- Conversion of Convertible Notes Into Common Shares."
    
 
     Because the price of the Common Shares is subject to market fluctuations,
the value of the Common Shares received by a holder of Convertible Notes upon
the Company's election to pay the Conversion Amount in Common Shares on the
Conversion Date may be more or less than the Current Market Price used to
compute the Exchange Rate.
 
   
     The Company will mail written notice of its election to pay the Conversion
Amount in either Common Shares or cash to each holder of record of Convertible
Notes not less than 30 Trading Days nor more than 45 Trading Days prior to the
Conversion Date and will include with such notice a description of the procedure
for making a Conversion Election. In the case of election by the Company to pay
the Conversion Amount in Common Shares, the Company will issue the number of
full Common Shares issuable in payment thereof. No fractional Common Shares will
be issued in payment of the Conversion Amount, but in lieu thereof, such
fractional interest shall be rounded down to the next whole share and an amount
will be paid in cash by the Company for such fractional interest based upon the
Current Market Price.
    
 
SUBORDINATION
 
     The indebtedness represented by the Convertible Notes and the payment of
the principal of and interest on each and all of the Convertible Notes are, to
the extent set forth in the Indenture, subordinate and subject in right of
payment to the prior payment in full of all Senior Indebtedness (as defined
below).
 
   
     In the event and during the continuation of any default in the payment of
principal or interest on any Senior Indebtedness beyond any applicable grace
period with respect thereto or an event of default with respect to any Senior
Indebtedness permitting the holders of such Senior Indebtedness (or a trustee on
behalf of the holders thereof) to declare such Senior Indebtedness due and
payable prior to the date on which it would otherwise have become due and
payable, or in the event any judicial proceeding shall be pending with respect
to any such default, then no payment shall be made by the Company on account of
principal of or interest on the Convertible Notes or on account of the purchase
or other acquisition of the Convertible Notes. (Section 1104) In the event of
(a) any insolvency or bankruptcy case or proceeding, or any receivership,
liquidation, reorganization or other similar case or proceeding in connection
therewith, relative to the Company or to its creditors, as such, or to its
assets, or (b) any liquidation, dissolution or other winding-up of the Company,
whether voluntary or involuntary and whether or not involving insolvency or
bankruptcy, or (c) any assignment for the benefit of creditors or any other
marshalling of assets and liabilities of the Company, then and in any such event
the holders of Senior Indebtedness shall be entitled to receive payment in full
of all amounts due or to become due on or in respect of all Senior Indebtedness,
or provision shall be made for such payment in cash, before the holders of the
Convertible Notes are entitled to receive any payment on account of principal of
or interest on the Convertible Notes, and to that end the holders of Senior
Indebtedness shall be entitled to receive, for application to the payment
thereof, any payment or distribution of any kind or character, whether in cash,
property or securities, which may be payable or deliverable in respect of the
Convertible Notes in any such case, proceeding, dissolution, liquidation or
other winding-up or event. In the event that, notwithstanding the foregoing, the
Trustee or the holder of any Convertible Note shall have received any payment or
distribution of assets of the Company of any kind or character, whether in cash,
property or
    
 
                                       20
<PAGE>   22
 
securities, before all Senior Indebtedness is paid in full or payment thereof
provided for, and if such fact shall, at or prior to the time of such payment or
distribution, have been made known to the Trustee or, as the case may be, such
holder, then and in such event such payment or distribution shall be paid over
or delivered forthwith to the trustee in bankruptcy, receiver, liquidating
trustee, custodian, assignee, agent or other Person making payment or
distribution of assets of the Company for application to the payment of all
Senior Indebtedness remaining unpaid, to the extent necessary to pay all Senior
Indebtedness in full, after giving effect to any concurrent payment or
distribution to or for the holders of Senior Indebtedness. (Section 1102)
 
     Because of these subordination provisions, in the event of an insolvency of
the Company, holders of Convertible Notes may recover less, ratably, than
holders of Senior Indebtedness.
 
     "Senior Indebtedness" means (a) the principal of and interest on all
indebtedness of the Company (including indebtedness of others guaranteed by the
Company) other than the Convertible Notes, whether outstanding on the date of
the Indenture or thereafter created, incurred or assumed, which is (i) for money
borrowed or (ii) evidenced by a note or similar instrument given in connection
with the acquisition of any businesses, properties or assets of any kind and (b)
amendments, renewals, extensions, modifications and refundings of any such
indebtedness, unless in any case in the instrument creating or evidencing any
such indebtedness or pursuant to which the same is outstanding it is provided
that such indebtedness is not superior in right of payment to the Convertible
Notes. (Section 101) As of November 22, 1996, the Company had no outstanding
Senior Indebtedness.
 
     The Indenture also does not restrict the ability of the Company (or its
subsidiaries) to incur debt ranking pari passu with the Convertible Notes. If
the Company incurs any such debt, the holders of such pari passu debt would be
entitled to share ratably with the holders of the Convertible Notes in any
proceeds distributed in connection with the insolvency, liquidation,
reorganization, dissolution or other winding-up of the Company. This may have
the effect of reducing the amount of such proceeds paid to the holders of the
Convertible Notes.
 
EVENTS OF DEFAULT
 
     Each of the following will constitute an Event of Default under the
Indenture with respect to the Convertible Notes: (a) failure to pay principal,
including any Conversion Amount, of any Convertible Note when due; (b) failure
to pay any interest on any Convertible Note when due, continued for 30 days; (c)
failure to perform any other covenant of the Company in the Indenture, continued
for 60 days after written notice has been given by the Trustee, or the holders
of at least 10% in principal amount of the outstanding Convertible Notes, as
provided in the Indenture; and (d) certain events in bankruptcy, insolvency or
reorganization. (Section 501)
 
     If an Event of Default with respect to the Convertible Notes shall occur
and be continuing, either the Trustee or the holders of not less than 25% in
aggregate principal amount of the outstanding Convertible Notes by notice as
provided in the Indenture may declare the principal amount of the Convertible
Notes to be due and payable immediately. After any such acceleration, but before
a judgment or decree based on acceleration, the holders of a majority in
aggregate principal amount of the outstanding Convertible Notes may, under
certain circumstances, rescind and annul such acceleration if all Events of
Default, other than the non-payment of accelerated principal, have been cured or
waived as provided in the Indenture. (Section 502)
 
     Subject to the provisions of the Indenture relating to the duties of the
Trustee in case an Event of Default shall occur and be continuing, the Trustee
will be under no obligation to exercise any of its rights or powers under the
Indenture at the request or direction of any of the holders, unless such holders
shall have offered to the Trustee reasonable security or indemnity. (Section
603) Subject to such provisions for the indemnification of the Trustee and
certain other exceptions, the holders of a majority in aggregate principal
amount of the outstanding Convertible Notes will have the right to direct the
time, method and place of conducting any proceeding for any remedy available to
the
 
                                       21
<PAGE>   23
 
Trustee or exercising any trust or power conferred on the Trustee with respect
to the Convertible Notes. (Section 512)
 
     No holder of any Convertible Note will have any right to institute any
proceeding, with respect to the Indenture, or for the appointment of a receiver
or trustee, or for any other remedy thereunder, unless (i) such holder has
previously given to the Trustee written notice of a continuing Event of Default;
(ii) the holders of not less than 25% in principal amount of the outstanding
Convertible Notes will have made written request, and such holder or holders
have offered reasonable indemnity, to the Trustee to institute such proceeding
as trustee and (iii) the Trustee has failed to institute such proceeding, and
has not received from the holders of a majority in aggregate principal amount of
the outstanding Convertible Notes a direction inconsistent with such request,
within 60 days after such notice, request and offer. (Section 507)
Notwithstanding these provisions, the holder of any Convertible Note shall have
the right, which is absolute and unconditional, to receive payment of the
principal of and interest on such Convertible Note in accordance with the terms
thereof and on the Conversion Date to receive in respect of such Convertible
Note either cash or Common Shares as described under the caption "Optional
Conversion on Maturity of Convertible Notes" above and to institute suit for the
enforcement of any such payment, and such rights shall not be impaired without
the consent of such holder. (Section 508)
 
     The Company will be required to furnish to the Trustee annually a statement
by certain of its officers as to whether or not the Company, to their knowledge,
is in default in the performance or observance of any of the terms, provisions
and conditions of the Indenture and, if so, specifying all such known defaults.
(Section 1004)
 
     The Indenture provides that the Trustee shall give the holders notice of
any default under the Indenture as and to the extent provided by the Trust
Indenture Act; provided, however, that in the case of certain defaults specified
in the Indenture, no such notice to holders shall be given until at least 30
days after the occurrence thereof. (Section 602)
 
     The holders of not less than a majority in principal amount of the
outstanding Convertible Notes may on behalf of the holders of all the
Convertible Notes waive any past default and its consequences, except a default
in the payment of the principal of or interest on any Convertible Note, or in
respect of a covenant or provision in the Indenture which cannot be modified or
amended without the consent of the holder of each outstanding Convertible Note
affected. (Section 513)
 
MERGER AND CONSOLIDATION
 
     The Company may not consolidate with or merge into, or convey, transfer or
lease its properties and assets substantially as an entirety to, any Person (a
"successor Person"), and may not permit any Person to merge into, or convey,
transfer or lease its properties and assets substantially as an entirety to, the
Company, unless (i) the successor Person (if any) is a corporation, partnership,
trust or other entity organized and validly existing under the laws of any
domestic jurisdiction and assumes the Company's obligations on the Convertible
Notes and under the Indenture, (ii) immediately after giving effect to the
transaction, no Event of Default, and no event which, after notice or lapse of
time or both, would become an Event of Default, shall have occurred and be
continuing and (iii) certain other conditions are met. (Section 801)
 
ADJUSTMENT FOR CERTAIN CONSOLIDATIONS OR MERGERS
 
     In case of any consolidation or merger to which the Company is a party
(other than a merger or consolidation in which the Company is the continuing
corporation and in which the Common Shares outstanding immediately prior to the
merger or consolidation remain unchanged), or in case of any sale or transfer to
another entity of the property of the Company as an entirety or substantially as
an entirety, or in case of any statutory share exchange with another entity
(other than in connection with an acquisition in which the Common Shares
outstanding immediately prior to the share exchange remain unchanged), each
Convertible Note shall, after consummation of such transac-
 
                                       22
<PAGE>   24
 
   
tion, be subject to (i) conversion at the option of the holder into the kind and
amount of securities, cash, or other property receivable upon consummation of
such transaction by a holder of the number of Common Shares into which such
Convertible Notes might have been converted immediately prior to consummation of
such transaction and (ii) conversion on the Conversion Date into the kind and
amount of securities, cash, or other property receivable upon consummation of
such transaction by a holder of the number of Common Shares into which such
Convertible Note would have been converted if the conversion on the Conversion
Date had occurred immediately prior to the date of consummation of such
transaction assuming in each case that such holder of Common Shares failed to
exercise rights of election, if any, as to the kind or amount of securities,
cash, or other property receivable upon consummation of such transaction
(provided that if the kind or amount of securities, cash, or other property
receivable upon consummation of such transaction is not the same for each
nonelecting share, then the kind and amount of securities, cash, or other
property receivable upon consummation of such transaction for each nonelecting
share shall be deemed to be the kind and amount so receivable per share by a
plurality of the nonelecting shares). The kind and amount of securities into
which the Convertible Notes shall be convertible after consummation of such
transaction shall be subject to adjustment as described above under the caption
"Description of Series A Preferred Shares -- Conversion Adjustments" following
the date of consummation of such transaction. The Company may not become a party
to any such transaction unless the terms thereof are consistent with the
foregoing. (Section 1202)
    
 
MODIFICATION
 
     Modifications and amendments of the Indenture may be made by the Company
and the Trustee with the consent of the holders of 66 2/3% in aggregate
principal amount of the outstanding Convertible Notes; provided, however, that
no such modification or amendment may, without the consent of the holder of each
outstanding Convertible Note affected thereby, (a) change the Stated Maturity of
the principal of, or any installment of principal of or interest on, any
Convertible Note, (b) reduce the principal amount of, or interest on, any
Convertible Note, (c) change the place or currency of payment of principal of,
or interest on, any Convertible Note, (d) impair the right to institute suit for
the enforcement of any payment on or with respect to any Convertible Note, (e)
modify the subordination provisions in a manner adverse to the holders of the
Convertible Notes, (f) reduce the percentage in principal amount of outstanding
Convertible Notes, the consent of whose holders is required for modification or
amendment of the Indenture, (g) reduce the percentage in principal amount of
outstanding Convertible Notes necessary for waiver of compliance with certain
provisions of the Indenture or for waiver of certain defaults or (h) modify such
provisions with respect to modification and waiver except to increase any such
percentage or to provide that certain other provisions of the Indenture cannot
be modified or waived without the consent of the holder of each Convertible Note
affected thereby. (Section 902)
 
REDEMPTION
 
     The Convertible Notes are not subject to redemption prior to the Conversion
Date and do not contain sinking fund or other mandatory redemption provisions.
 
BOOK-ENTRY ONLY ISSUANCE -- THE DEPOSITORY TRUST COMPANY
 
   
     The Convertible Notes will be represented by one or more fully registered
global notes (collectively, the "Global Note"). The Global Note will be
deposited upon issuance with a custodian for The Depository Trust Company (the
"Depositary") and registered in the name of the Depositary or a nominee of the
Depositary (the "Global Note Registered Owner"). Except as set forth below, the
Global Note may be transferred, in whole and not in part, only to another
nominee of the Depositary or to a successor of the Depositary or its nominee.
    
 
     The Depositary has advised the Company that the Depositary is a
limited-purpose trust company created to hold securities for its participating
organizations (collectively, the "Partici-
 
                                       23
<PAGE>   25
 
pants") and to facilitate the clearance and settlement of transactions in those
securities between the Participants through electronic book-entry changes in
accounts of its Participants. The Participants include securities brokers and
dealers (including the Purchasers), banks, trust companies, clearing
corporations and certain other organizations. Access to the Depositary's system
is also available to other entities such as banks, brokers, dealers and trust
companies that clear through or maintain a custodial relationship with a
Participant, either directly or indirectly (collectively, the "Indirect
Participants"). Persons who are not Participants may beneficially own securities
held by or on behalf of the Depositary only through the Participants or the
Indirect Participants. The ownership interest and transfer of ownership interest
of each actual purchaser of each security held by or on behalf of the Depositary
are recorded on the records of the Participants and Indirect Participants.
 
     The Depositary has also advised the Company that pursuant to procedures
established by it, (i) upon deposit of the Global Note, the Depositary will
credit the accounts of Participants designated by the Purchasers with portions
of the principal amount of the Global Notes and (ii) ownership of such interests
in the Global Note will be shown on, and the transfer of ownership thereof will
be effected only through, records maintained by the Depositary (with respect to
the Participants) or by the Participants and the Indirect Participants (with
respect to other owners of beneficial interests in the Global Note). The laws of
some states require that certain persons take physical delivery in definitive
form of securities that they own. Consequently, the ability to transfer
Convertible Notes will be limited to that extent.
 
     Except as described below, owners of interests in the Global Note will not
have Convertible Notes registered in their names, will not receive physical
delivery of Convertible Notes in definitive form and will not be considered the
registered owners or holders thereof under the Indenture for any purpose. As
long as the Depositary, or its nominee, is the registered owner of the Global
Note, the Depositary, or its nominee, as the case may be, will be considered the
sole owner and holder of the Convertible Notes represented by the Global Note
for all purposes under the Indenture and the Convertible Notes.
 
     Payments in respect of the principal of and premium, if any, and interest
on any Convertible Notes registered in the name of the Global Note Registered
Owner will be payable by the Trustee to the Global Note Registered Owner in its
capacity as the registered holder under the Indenture. Under the terms of the
Indenture, the Company and the Trustee will treat the persons in whose names the
Convertible Notes, including the Global Note, are registered as the owners
thereof for the purpose of receiving such payments and for any and all other
purposes whatsoever. Consequently, neither the Company, the Trustee nor any
agent of the Company or the Trustee has or will have any responsibility or
liability for (i) any aspect of the Depositary's records or any Participant's
records relating to or payments made on account of beneficial ownership
interests in the Global Note, or for maintaining, supervising or reviewing any
of the Depositary's records or any Participant's records relating to the
beneficial ownership interests in the Global Note or (ii) any other matter
relating to the actions and practices of the Depositary or any of its
Participants. The Depositary had advised the Company that its current practice,
upon receipt of any payment in respect of securities such as the Convertible
Notes (including principal and interest), is to credit the accounts of the
relevant Participants with the payment on the payment date, in amounts
proportionate to their respective holdings in principal amount of beneficial
interests in the relevant security as shown on the records of the Depositary
unless the Depositary has reason to believe it will not receive payment on such
payment date. Payments by the Participants and the Indirect Participants to the
beneficial owners of Convertible Notes will be governed by standing instructions
and customary practices and will be the responsibility of the Participants or
the Indirect Participants and will not be the responsibility of the Depositary,
the Trustee or the Company. Neither the Company nor the Trustee will be liable
for any delay by the Depositary or any of its Participants in identifying the
beneficial owners of the Convertible Notes, and the Company and the Trustee may
conclusively rely on and will be protected in relying on instructions in the
Global Note Registered Owner for all purposes.
 
                                       24
<PAGE>   26
 
     The Global Note is exchangeable for definitive Convertible Notes in
registered certificated form only if (i) the Depositary (x) notifies the Company
that it is unwilling or unable to continue as Depositary for the Global Note and
the Company thereupon fails to appoint a successor Depositary or (y) has ceased
to be a clearing agency registered under the Exchange Act, (ii) the Company, at
its option, notifies the Trustee in writing that it elects to cause the issuance
of the Convertible Notes in definitive registered certificated form or (iii)
there shall have occurred and be continuing an Event of Default or any event
which after notice or lapse of time or both would be an Event of Default with
respect to the Convertible Notes. Such definitive Convertible Notes shall be
registered in the names of the owners of the beneficial interests in the Global
Note as provided by the Participants. Upon issuance of Convertible Notes in
definitive registered certificated form, the Trustee is required to register the
Convertible Notes in the name of, and cause the Convertible Notes to be
delivered to, the person or persons (or the nominee thereof) identified as the
beneficial owners as the Depositary shall direct.
 
     The information in this section concerning the Depositary's book-entry
system has been obtained from sources that the Company believes to be reliable,
but the Company takes no responsibility for the accuracy thereof.
 
                 CERTAIN U.S. FEDERAL INCOME TAX CONSIDERATIONS
 
GENERAL
 
   
     The following discussion is based on relevant provisions of the Internal
Revenue Code of 1986, as amended (the "Code"), the Treasury regulations
promulgated thereunder ("Treasury Regulations"), published revenue rulings, and
judicial decisions in effect at the date of this Prospectus. There can be no
assurance that future changes in applicable law or administrative and judicial
interpretations thereof, which changes could have retroactive effect, will not
adversely affect the tax consequences discussed herein or that there will not be
differences of opinion as to the interpretation of applicable law. This
discussion addresses those federal income tax consequences which, in the opinion
of Preston Gates & Ellis, counsel to the Company, are material to an investment
in the Series A Preferred Shares and has been prepared based on the advice of
such counsel. The following discussion is for general information only, is
addressed only to investors who acquire the Series A Preferred Shares on
original issuance, and does not attempt to address the possible federal income
tax consequences to certain categories of investors, some of which (including
life insurance companies, tax-exempt entities, banks, and dealers in securities)
may be subject to special rules. Potential investors should consult their own
tax advisors as to the tax treatment which may be anticipated to result from the
ownership or disposition of Series A Preferred Shares in their particular
circumstances, including the application of state, local and other tax laws.
    
 
DIVIDENDS ON SERIES A PREFERRED SHARES
 
     For federal income tax purposes, the term "dividend" means a distribution
with respect to shares made out of current or accumulated earnings and profits
of the distributing corporation. To the extent that a distribution with respect
to shares exceeds the distributing corporation's current and accumulated
earnings and profits, it is first treated as a nontaxable recovery of the
shareholder's basis in the shares to the extent thereof (thus increasing the
amount of gain or reducing the amount of loss which may be realized by such
holder upon sale or exchange of such shares), and then as gain from the sale or
exchange of the shares, taxable as capital gain so long as the shares are held
as a capital asset.
 
     Although shares with terms closely comparable to those of the Series A
Preferred Shares have not been the subject of any regulations, rulings or
judicial decisions currently in effect, in the opinion of Preston Gates & Ellis,
dividends paid on the Series A Preferred Shares will be taxable as ordinary
income and it is more likely than not that such dividends will qualify for the
70% intercorporate
 
                                       25
<PAGE>   27
 
dividends-received deduction subject to the minimum holding period (generally at
least 46 days) and other applicable requirements. However, it is possible that
the Internal Revenue Service ("IRS") may take a contrary position on the
eligibility of the dividends on the Series A Preferred Shares for the dividend
received deduction; accordingly, in the event that the availability of such
deduction is relevant to a holder, such holder should consult its tax advisor
prior to claiming such deduction. Furthermore, if the deduction is available,
under certain circumstances, a corporate holder may be subject to the
alternative minimum tax with respect to a portion of the amount of its
dividends-received deduction.
 
     Under certain circumstances, a corporation that receives an "extraordinary
dividend," as defined in Section 1059(c) of the Code, is required to reduce its
basis in the shares by the nontaxed portion of such dividend. Generally,
dividends not in arrears paid to an original holder of Series A Preferred Shares
will not constitute extraordinary dividends under Section 1059(c).
 
REDEMPTION PREMIUM IN RESPECT OF SERIES A PREFERRED SHARES
 
     Under certain circumstances, Section 305(c) requires that any excess of the
redemption price of preferred shares over the issue price be includable in
income, prior to receipt, as a constructive dividend. However, Section 305(c)
and the Treasury Regulations issued thereunder should not apply to shares with
terms such as those of the Series A Preferred Shares, although the issue is not
free from doubt.
 
RECEIPT OF COMMON SHARES UPON CONVERSION OF SERIES A PREFERRED SHARES
 
     Gain or loss will not be recognized by a holder upon the conversion of the
Series A Preferred Shares into Common Shares if no cash is received. Dividend
income may be recognized, however, to the extent cash or Common Shares are
received in payment of dividends in arrears. A holder who receives cash in lieu
of a fractional Common Share will be treated as having received such fractional
share and exchanged it for cash in a transaction subject to Section 302 and
related provisions (discussed below).
 
     Generally, a holder's basis in the Common Shares received upon the
conversion of the Series A Preferred Shares (other than any Common Shares taxed
as a dividend upon receipt) will equal the basis of the converted Series A
Preferred Shares plus the amount of gain recognized, minus the amount of cash
received (other than cash which is treated as a dividend). The holding period of
such Common Shares will include the holding period of the converted Series A
Preferred Shares.
 
ADJUSTMENT OF CONVERSION RATE IN RESPECT OF SERIES A PREFERRED SHARES
 
     Certain adjustments to the common equivalent rate to reflect the Company's
issuance of certain rights, warrants, evidences of indebtedness, securities or
other assets to holders of Common Shares may result in constructive
distributions taxable as dividends to the holders of the Series A Preferred
Shares which may constitute (and cause other dividends to constitute)
extraordinary dividends to corporate holders. See "-- Dividends on Series A
Preferred Shares."
 
EXCHANGE OF SERIES A PREFERRED SHARES FOR CONVERTIBLE NOTES OR CASH SETTLEMENT
AT MATURITY -- SECTION 302 ISSUES
 
     Exchange of Series A Preferred Shares for Convertible Notes or settlement
of Series A Preferred Shares at maturity for cash will be a taxable event to the
affected shareholders (assuming that the Convertible Notes are treated as debt
for federal income tax purposes). See "-- Treatment of Convertible Notes as Debt
or Equity." The exchange or cash settlement may result in a tax liability for an
affected shareholder without any correlative cash payment to such shareholder.
 
     The amount received in the exchange or cash settlement will be treated as a
distribution taxable as a dividend (to the extent of the Company's earnings and
profits) to the affected shareholder
 
                                       26
<PAGE>   28
 
   
under Section 302 (and may constitute an extraordinary dividend under Section
1059) unless the exchange or cash settlement: (a) is treated as a distribution
"not essentially equivalent to a dividend" with respect to the shareholder under
Section 302(b)(1); (b) is "substantially disproportionate" with respect to the
shareholder under Section 302(b)(2); (c) "completely terminates" the
shareholder's equity interest in the Company pursuant to Section 302(b)(3); or
(d) is of shares held by a non-corporate shareholder and is in partial
liquidation of the Company pursuant to Section 302(b)(4). In determining whether
any of these tests have been met, there generally must be taken into account
shares actually owned by the shareholder and shares considered to be owned by
the shareholder by reason of certain constructive ownership rules set forth in
Section 318. For purposes of determining whether any of these tests has been
met, a person who holds an option to acquire Common Shares will be deemed to own
such shares. A distribution will be "not essentially equivalent to a dividend"
as to a particular shareholder if it results in a "meaningful reduction" in the
shareholder's interest in the Company. Prospective holders of Series A Preferred
Shares should consult their own tax advisers as to the application of this rule.
    
 
     If any of these tests is met as to a shareholder, the exchange or cash
settlement of the Series A Preferred Shares generally would be treated as to
that shareholder as an exchange under Section 302(a) giving rise to capital gain
or loss (measured by the excess of the value of the Convertible Notes received
over the holder's tax basis in the affected shares). However, Convertible Notes
or cash payments received upon exchange or cash settlement that represent
accrued but unpaid dividends may be taxed as ordinary income dividends, and the
extraordinary dividend and/or the redemption premium rules discussed above could
apply.
 
   
     The Series A Preferred Shares and the Convertible Notes have been
structured with a view toward minimizing the risk that the exchange for
Convertible Notes or cash settlement at maturity of the Series A Preferred
Shares will be treated as a dividend. Accordingly, it is anticipated that the
treatment of most holders of Series A Preferred Shares whose shares are
exchanged for Convertible Notes or cash settled at maturity will be governed by
Section 302(a), with the result that they will recognize capital gain or loss.
    
 
     The application of Section 302(a) to any shareholder, however, will depend
on the facts and circumstances surrounding the acquisition, holding and
disposition of the Series A Preferred Shares and any other Common Shares
directly, indirectly or constructively held by such shareholder, and thus each
shareholder should consult their tax advisor at the time of any exchange or cash
settlement.
 
TREATMENT OF CONVERTIBLE NOTES AS DEBT OR EQUITY
 
     The Company intends to treat the Convertible Notes as debt for federal
income tax purposes. This characterization is binding on a holder of the
Convertible Notes unless the holder discloses on his or her federal income tax
return that he or she is taking a contrary position. The following assumes that
the Convertible Notes will be treated as debt for federal income tax purposes.
 
ORIGINAL ISSUE DISCOUNT ON CONVERTIBLE NOTES
 
   
     If the Series A Preferred Shares are exchanged for Convertible Notes and
the "issue price" of such Convertible Notes as determined under Section 1273 or
1274 is less than the "stated redemption price at maturity" of such Convertible
Notes (as determined under Section 1273), then, subject to a de minimis rule set
forth in Section 1273(a)(3), the Convertible Notes will bear original issue
discount ("OID"). (The "issue price" of a Convertible Note will be equal to the
fair market value of the Series A Preferred Shares for which it is exchanged.)
Assuming the holder has recognized loss as the result of the exchange so that
the holder's basis equals the issue price of the Convertible Note, the holder of
a Convertible Note generally would be required to include in income as interest,
in each taxable year during which he or she holds the Convertible Note, a
portion of the OID allocable to the Convertible Note (regardless of whether any
amount actually was received from
    
 
                                       27
<PAGE>   29
 
the issuer in that taxable year). The total amount of OID included in income,
however, would not exceed the amount of the loss previously recognized. The
holder's adjusted basis in the Convertible Note would be increased by the
amounts so included in income. The amount of the OID taken into account in a
particular year would be calculated under the constant yield to maturity method,
employing annual compounding. Under this method, the amount of OID includable as
ordinary income of a holder in early years is less than the amount includable in
later years.
 
     Stated interest on the Convertible Notes is includable in the holder's
taxable income in accordance with such holder's method of accounting.
 
BOND PREMIUM ON CONVERTIBLE NOTES
 
   
     If the Series A Preferred Shares are exchanged for Convertible Notes, and
the holder's basis in such Convertible Notes exceeds the amount payable at the
maturity date (or earlier redemption date, if appropriate) of the Convertible
Notes, such excess (excluding the amount thereof attributable to the conversion
feature of the Convertible Notes, as determined under Treasury Regulations
issued under Section 171) may be deductible as amortizable bond premium. Such
premium may be amortized by the holder of such Convertible Notes over the term
of the Convertible Notes (taking into account earlier call dates, as
appropriate), under a yield to maturity formula if an election by the taxpayer
under Section 171 is in effect or is made. Such election is binding once made
and applies to all debt obligations owned or subsequently acquired by the
taxpayer. For federal income tax purposes, the amortizable bond premium will be
treated as an offset to interest income on the Convertible Notes rather than as
a separate deduction item. The availability of such deductions will be subject
to certain limitations with respect to individuals, who should consult with his
or her tax advisors regarding the availability of such deductions.
    
 
CASH SETTLEMENT OF CONVERTIBLE NOTES AT MATURITY
 
     On cash settlement of the Convertible Notes at maturity, except to the
extent the cash received is attributable to accrued interest (which represents
ordinary interest income) or market discount, as defined in Section 1278, a
holder generally should recognize capital gain or loss measured by the
difference between the amount of cash received and the holder's tax basis in the
Convertible Notes settled for cash at maturity.
 
CONVERSION OF CONVERTIBLE NOTES INTO COMMON SHARES
 
     In general, no gain or loss should be recognized to the holder upon
conversion of the Convertible Notes into Common Shares; however, this conclusion
is not free from doubt and may be challenged by the IRS. If the conversion
occurred when there was accrued interest on the Convertible Notes, a portion of
the Common Shares received will be taxable as ordinary income.
 
BACKUP WITHHOLDING ISSUES
 
     Certain noncorporate holders may be subject to backup withholding at a rate
of 31% on actual and deemed dividend payments and certain other consideration
received upon the call, exchange, redemption or conversion of the Series A
Preferred Shares or the Convertible Notes. Generally, backup withholding applies
only when the taxpayer fails to furnish or certify a proper Taxpayer
Identification Number or when the taxpayer is notified by the Internal Revenue
Service that it has failed to report payments of interest and dividends
properly. Holders should consult their tax advisors regarding their
qualification for exemption from backup withholding and the procedure for
obtaining any applicable exemption.
 
                                       28
<PAGE>   30
 
SPECIAL TAX RULES APPLICABLE TO FOREIGN HOLDERS
 
     DIVIDENDS ON SERIES A PREFERRED SHARES
 
   
     Dividends on Series A Preferred Shares that are paid to a Foreign Holder
(as defined below) that are not treated as effectively connected with a trade or
business carried on by such Foreign Holder in the United States are generally
subject to a 30% United States withholding tax. Such rate of withholding may be
reduced to the extent provided by a tax treaty to which the United States is a
party if the recipient of the dividends is entitled to the benefits of such
treaty.
    
 
     In general, a "Foreign Holder" is any person other than (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 (c) an estate
or trust the income of which is subject to United States federal income taxation
regardless of its source.
 
     Dividends on Series A Preferred Shares that are effectively connected with
a trade or business carried on in the United States by a Foreign Holder will be
subject to tax at the same rates of tax applicable to domestic corporations or
citizens and residents of the United States, as the case may be. The
determination of whether a person is engaged in a United States trade or
business and whether the dividends or gains realized in connection with the
Series A Preferred Shares or Common Shares are effectively connected with that
trade or business will depend upon the specific facts and circumstances of each
shareholder. In the case of a Foreign Holder that is a corporation, such
effectively connected income may be subject to the branch profits tax, which is
generally imposed on foreign corporations upon the repatriation from the United
States of effectively connected earnings and profits unless an applicable tax
treaty eliminates or reduces the rate of such tax.
 
     INTEREST ON CONVERTIBLE NOTES
 
     Interest on the Convertible Notes paid to a Foreign Holder, which is not
effectively connected with a United States trade or business of such Foreign
Holder, generally should not be subject to federal withholding tax so long as
the Foreign Holder complies with certain certification requirements of federal
income tax law, and so long as the Convertible Notes are treated as debt for
federal income tax purposes. (If the Convertible Notes are treated as equity the
rules described in the three preceding paragraphs will apply to holders.)
Interest on the Convertible Notes that is effectively connected with a trade or
business carried on in the United States by a Foreign Holder will be subject to
tax at the same rates of tax applicable to domestic corporations or citizens and
residents of the United States, as the case may be.
 
     DISPOSITION OF SERIES A PREFERRED SHARES OR CONVERTIBLE NOTES
 
   
     Subject to the discussion below under "-- Backup Withholding and
Information Reporting," a Foreign Holder generally will not be subject to United
States tax on gains realized from the sale or other disposition of their Series
A Preferred Shares or Convertible Notes unless (i) such gain is effectively
connected with the conduct of a trade or business carried on in the United
States, or (ii) the foreign holder is a non-resident alien individual present in
the United States for a period or periods aggregating 183 days or more during
the taxable year of such disposition and the gains are attributable to an office
or other fixed place of business in the United States (in such case a 30% United
States tax is imposed on the amount by which such person's gains derived from
United States sources, from the sale or exchange at any time during such taxable
year of capital assets, exceed such person's losses allocable to United States
sources, from the sale or exchange at any time during such taxable year of
capital assets).
    
 
     In addition, no federal income tax will be imposed on a Foreign Holder on
the settlement of the Series A Preferred Shares for Common Shares or cash (in a
transaction which is treated as an exchange under the Section 302(a)), or the
conversion of the Convertible Notes for Common
 
                                       29
<PAGE>   31
 
Shares. See "-- Exchange of Series A Preferred Shares for Convertible Notes or
Cash Settlement at Maturity -- Section 302 Issues."
 
     BACKUP WITHHOLDING AND INFORMATION REPORTING
 
   
     Payments of dividends and interest to Foreign Holders are generally subject
to information reporting and possibly to a United States backup withholding tax
(which generally is a withholding tax that is imposed at the rate of 31% on
certain payments to persons that fail to furnish the information required under
the Code and Treasury Regulation thereunder). Backup withholding generally will
not apply to dividends paid on Series A Preferred Shares or interest paid on
Convertible Notes to Foreign Holders at an address outside the United States.
    
 
   
     The payments of the proceeds from a disposition of Series A Preferred
Shares or Common Shares to or through the United States office of a broker will
be subject to information reporting and backup withholding unless the holder or
beneficial owner certifies as to its non-United States status or otherwise
establishes an exemption from backup withholding. The payment of the proceeds
from the disposition of Series A Preferred Shares or Common Shares to or through
a non-United States office of a broker will not be subject to information
reporting or backup withholding, except that if the broker is a United States
person, a controlled foreign corporation for United States tax purposes or a
foreign person 50% of more of whose gross income was effectively connected with
the conduct of a trade or business within the United States for a specified
three-year period, information reporting will apply to such payments unless such
broker has documentary evidence in its files of the owner's non-United States
status and has no actual knowledge to the contrary, or the owner otherwise
establishes an exemption.
    
 
                                       30
<PAGE>   32
 
                                  UNDERWRITING
 
     Subject to the terms and conditions of the Underwriting Agreement, the
Company has agreed to sell to each of the Underwriters named below, and each of
such Underwriters, for whom Goldman, Sachs & Co. and Morgan Stanley & Co.
Incorporated are acting as representatives, has severally agreed to purchase
from the Company, the respective number of Series A Preferred Shares set forth
opposite its name below:
 
<TABLE>
<CAPTION>
                                                                          NUMBER OF
                                                                           SERIES A
                                 UNDERWRITER                           PREFERRED SHARES
        -------------------------------------------------------------  ----------------
        <S>                                                            <C>
        Goldman, Sachs & Co. ........................................
        Morgan Stanley & Co. Incorporated............................
 
                                                                             ------
                  Total..............................................
                                                                             ======
</TABLE>
 
     Under the terms and conditions of the Underwriting Agreement, the
Underwriters are committed to take and pay for all of the Series A Preferred
Shares offered hereby, if any are taken.
 
     The Underwriters propose to offer the Series A Preferred Shares in part
directly to the public at the initial public offering price set forth on the
cover page of this Prospectus and in part to certain securities dealers at such
price less a concession of $          per share. The Underwriters may allow, and
such dealers may reallow, a concession not in excess of $          per share to
certain brokers and dealers. After the Series A Preferred Shares are released
for sale to the public, the offering price and other selling terms may from time
to time be varied by the representatives.
 
   
     The Company has granted the Underwriters an option exercisable for 30 days
after the date of this Prospectus to purchase up to an aggregate of
additional Series A Preferred Shares to cover over-allotments, if any. If the
Underwriters exercise their over-allotment option, the Underwriters have
severally agreed, subject to certain conditions, to purchase approximately the
same percentage thereof that the number of shares to be purchased by each of
them, as shown in the foregoing table, bears to the Series A Preferred Shares
offered.
    
 
   
     The Company has agreed that, during the period beginning from the date of
this Prospectus and continuing to and including the date 90 days after the date
of this Prospectus, it will not offer, sell, contract to sell or otherwise
dispose of any securities of the Company (other than (A) in connection with an
acquisition of an enterprise or tangible or intangible property other than cash
where the securities of the Company so disposed of (i) are not more than two
percent of the aggregate of the outstanding Common Shares and Common Shares
issuable upon conversion or exercise of rights pursuant to other outstanding
securities, including the Series A Preferred Shares and existing employee stock
options, (ii) are "restricted securities" as defined in Rule 144 of the
Securities Act, or (iii) are transferred to one or more persons who agree in
writing not to dispose of such securities during the balance of the 90-day
period after the date of this Prospectus, (B) pursuant to existing employee
stock option or purchase plans, or (C) on the conversion or exchange of
convertible or exchangeable securities outstanding on the date of this
Prospectus) which are substantially similar to the Series A Preferred Shares or
any Common Shares or securities which are convertible into or exchangeable for
Common Shares without the prior written consent of the representatives, except
for the Series A Preferred Shares offered in connection with the offering.
    
 
                                       31
<PAGE>   33
 
   
     There is currently no public market for the Series A Preferred Shares.
Although the Series A Preferred Shares have been approved for quotation on the
Nasdaq National Market, there can be no assurance that an active market for the
Series A Preferred Shares will develop.
    
 
     The Series A Preferred Shares will be quoted on the Nasdaq National Market
under the symbol "MSFTP."
 
     The Company has agreed to indemnify the several Underwriters against
certain liabilities, including liabilities under the Securities Act.
 
                             VALIDITY OF SECURITIES
 
   
     The validity of the Series A Preferred Shares, and the Convertible Notes
and Common Shares issuable upon exchange or conversion thereof, will be passed
upon for the Company by Preston Gates & Ellis, Seattle, Washington, and for the
Underwriters by Sullivan & Cromwell, New York, New York. Sullivan & Cromwell
will rely on Preston Gates & Ellis with respect to matters of Washington law. As
of the date hereof, attorneys in Preston Gates & Ellis who worked on substantive
matters for the Company own less than 250,000 Common Shares. Sullivan & Cromwell
from time to time performs legal services for the Company.
    
 
                                    EXPERTS
 
     The financial statements of the Company as of June 30, 1996, and 1995 and
for each of the three years in the period ended June 30, 1996, incorporated by
reference in this Prospectus from the Company's Annual Report on Form 10-K, have
been audited by Deloitte & Touche LLP, independent auditors, as stated in their
report which is incorporated herein by reference, and has been so incorporated
in reliance upon such opinion given upon the authority of said firm as experts
in accounting and auditing.
 
                                       32
<PAGE>   34
 
             ------------------------------------------------------
             ------------------------------------------------------
 
     NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS, AND, IF GIVEN OR
MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY ANY SECURITIES OTHER THAN THE SECURITIES TO
WHICH IT RELATES OR AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY SUCH
SECURITIES IN ANY CIRCUMSTANCES IN WHICH SUCH OFFER OR SOLICITATION IS UNLAWFUL.
NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER
ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF OR THAT THE INFORMATION CONTAINED
HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS DATE.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
Available Information.................    3
Incorporation of Certain Documents by
  Reference...........................    4
Prospectus Summary....................    5
Risk Factors..........................    9
Use of Proceeds.......................   10
Selected Financial Data...............   11
Business..............................   12
Description of Capital Shares.........   13
Description of Series A Preferred
  Shares..............................   13
Description of Convertible Notes......   18
Certain U.S. Federal Income Tax
  Considerations......................   25
Underwriting..........................   31
Validity of Securities................   32
Experts...............................   32
</TABLE>
    
 
             ------------------------------------------------------
             ------------------------------------------------------
 
             ------------------------------------------------------
             ------------------------------------------------------
                                     SHARES
 
                             MICROSOFT CORPORATION
 
                            % CONVERTIBLE EXCHANGEABLE
                              PRINCIPAL-PROTECTED
                           PREFERRED SHARES, SERIES A
 
   
                         (MINIMUM VALUE AT MATURITY AND
    
   
LIQUIDATION PREFERENCE OF $                                           PER SHARE)
    
 
                   (SUBJECT TO CONVERSION INTO COMMON SHARES
                        OR EXCHANGE INTO   % CONVERTIBLE
   
                          SUBORDINATED NOTES DUE 1999)
    
                            ------------------------
 
                                     (LOGO)
 
                            ------------------------
 
                              GOLDMAN, SACHS & CO.
 
                              MORGAN STANLEY & CO.
                                                INCORPORATED
 
                      REPRESENTATIVES OF THE UNDERWRITERS
 
             ------------------------------------------------------
             ------------------------------------------------------
<PAGE>   35
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
     The expenses relating to the distribution will be borne by the registrant.
Such expenses are estimated to be as follows:
 
   
<TABLE>
    <S>                                                                        <C>
    Registration Fee -- Securities and Exchange Commission...................  $261,364
    NASD Filing Fees and Expenses (Including Legal Fees).....................    37,500
    Nasdaq National Market Listing Fee.......................................    50,000
    Transfer Agent and Registrar Fees........................................     3,000
    Legal Fees and Expenses..................................................   180,000
    Printing Expenses........................................................    85,000
    Trustee Fees.............................................................     5,000
    Accountant's Fees and Expenses...........................................    51,500
    Miscellaneous Expenses...................................................    51,636
                                                                               --------
              Total..........................................................  $725,000
                                                                               ========
</TABLE>
    
 
   
ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
    
 
     Article XII of the Restated Articles of Incorporation of the Company
authorizes the Company to indemnify any present or former director or officer to
the fullest extent not prohibited by the Washington Business Corporation Act,
public policy or other applicable law. The Washington Business Corporation Act
(Sections 23B.08.510 through .570) authorizes a corporation to indemnify its
directors, officers, employees, or agents in terms sufficiently broad to permit
such indemnification under certain circumstances for liabilities (including
provisions permitting advances for expenses incurred) arising under the
Securities Act.
 
     The directors and officers of the Company are entitled to indemnification
by the Underwriters against any cause of action, loss, claim, damage, or
liability to the extent it arises out of or is based upon the failure of each
Underwriter to comply with the Prospectus delivery requirements under the
federal securities laws or any applicable state securities laws or upon any
untrue statement or alleged untrue statement or omission or alleged omission
made in this Registration Statement and the Prospectus contained herein, as the
same shall be amended or supplemented, made in reliance upon and in conformity
with written information furnished to the Company by such Underwriter through
Goldman, Sachs & Co. expressly for use therein.
 
     In addition, the Company maintains directors' and officers' liability
insurance under which the Company's directors and officers are insured against
loss (as defined in the policy) as a result of claims brought against them for
their wrongful acts in such capacities.
 
                                      II-1
<PAGE>   36
 
ITEM 16. LIST OF EXHIBITS.
 
   
<TABLE>
<CAPTION>
EXHIBIT NO.                              DESCRIPTION                              PAGE OR FOOTNOTE
- -----------   ------------------------------------------------------------------  ----------------
<C>           <S>                                                                 <C>
     1.1      Underwriting Agreement............................................           *
     3.1      Restated Articles of Incorporation................................          (1)
     3.2      Bylaws............................................................          (2)
     4.1      Form of Amendment to the Registrant's Restated Articles of
              Incorporation designating the rights and preferences with respect
              to the Series A Preferred Shares..................................           *
     4.2      Form of Indenture with respect to the      % Convertible
              Subordinated Preferred Notes Due 1999.............................           *
     5.1      Opinion of Preston Gates & Ellis..................................           *
     8.1      Opinion of Preston Gates & Ellis..................................           *
    12.1      Computation of Ratio of Earnings to Fixed Charges.................           *
    13.1      Quarterly and Market Information Incorporated by Reference to Page
              28 of 1996 Annual Report to Shareholders ("1996 Annual Report")...          (3)
    13.2      (Intentionally Omitted)...........................................
    13.3      Management's Discussion and Analysis of Financial Condition and
              Results of Operations Incorporated by Reference to Pages 16-19,
              22, and 23 of 1996 Annual Report..................................          (3)
    13.4      Financial Statements Incorporated by Reference to Pages 1, 15, 20,
              21, 24-29, and 31 of 1996 Annual Report...........................          (3)
    23.1      Consent of Deloitte & Touche LLP..................................
    23.2      Consent of Preston Gates & Ellis..................................          (4)
    24.1      Power of Attorney.................................................        II-4
    25.1      Statement of Eligibility of Trustee...............................           *
</TABLE>
    
 
- ---------------
  * To be filed by amendment.
 
   
(1) Filed previously with the Registrant's Registration Statement on Form S-3
    (Commission File No. 333-17143).
    
 
   
(2) Incorporated by reference to Microsoft's Form 10-K for the fiscal year ended
    June 30, 1994.
    
 
   
(3) Incorporated by reference to Microsoft's Form 10-K for the fiscal year ended
    June 30, 1996.
    
 
   
(4) Contained within Exhibit 5.1.
    
 
ITEM 17. UNDERTAKINGS.
 
     The undersigned registrant hereby undertakes:
 
          (1) That, for purposes of determining any liability under the
     Securities Act of 1933, each filing of the registrant's annual report
     pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act
     of 1934 (and, where applicable, each filing of an employee benefit plan's
     annual report pursuant to Section 15(d) of the Securities Exchange Act of
     1934) that is incorporated by reference in the registration statement shall
     be deemed to be a new registration statement relating to the securities
     offered therein, and the offering of such securities at that time shall be
     deemed to be the initial bona fide offering thereof.
 
          (2) That the undersigned registrant hereby undertakes to deliver or
     cause to be delivered with the prospectus, to each person to whom the
     prospectus is sent or given, the latest annual report to security holders
     that is incorporated by reference in the prospectus and furnished
 
                                      II-2
<PAGE>   37
 
     pursuant to and meeting the requirements of Rule 14a-3 or Rule 14c-3 under
     the Securities Exchange Act of 1934; and, where interim financial
     information required to be presented by Article 3 of Regulation S-X are not
     set forth in the prospectus, to deliver, or cause to be delivered to each
     person to whom the prospectus is sent or given, the latest quarterly report
     that is specifically incorporated by reference in the prospectus to provide
     such interim financial information.
 
          (3) That, insofar as indemnification for liabilities arising under the
     Securities Act of 1933 may be permitted to directors, officers and
     controlling persons of the registrant pursuant to the foregoing provisions,
     the registrant has been advised that in the opinion of the Securities and
     Exchange Commission such indemnification is against public policy as
     expressed in the Act and is, therefore, unenforceable. In the event that a
     claim for indemnification against such liabilities (other than the payment
     by the registrant of expenses incurred or paid by a director, officer or
     controlling person of the registrant in the successful defense of any
     action, suit or proceeding) is asserted by such director, officer or
     controlling person in connection with the securities being registered, the
     registrant will, unless in the opinion of its counsel the matter has been
     settled by a controlling precedent, submit to a court of appropriate
     jurisdiction the question whether such indemnification by it is against
     public policy as expressed in the Act and will be governed by a final
     adjudication of such issue.
 
          (4) That, for purposes of determining any liability under the
     Securities Act of 1933, the information omitted from the form of prospectus
     filed as part of this registration statement in reliance upon Rule 430A and
     contained in a form of prospectus filed by the registrant pursuant to Rule
     424(b)(1) or (4) or 497(h) under the Securities Act shall be deemed to be
     part of this registration statement as of the time it was declared
     effective.
 
          (5) That, for the purpose of determining any liability under the
     Securities Act of 1933, each post-effective amendment that contains a form
     of prospectus shall be deemed to be a new registration statement relating
     to the securities offered therein, and the offering of such securities at
     that time shall be deemed to be the initial bona fide offering thereof.
 
                                      II-3
<PAGE>   38
 
                                   SIGNATURES
 
   
     Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this Amendment No. 1 to
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Redmond, State of Washington on December 13,
1996.
    
 
                                          MICROSOFT CORPORATION
 
                                                   /s/ MICHAEL W. BROWN
 
                                          --------------------------------------
                                                    Michael W. Brown,
                                              Vice President, Finance; Chief
                                                    Financial Officer
 
   
     Pursuant to the requirements of the Securities Act of 1933, this amendment
to registration statement has been signed below on December 13, 1996 by the
following persons in the capacities indicated.
    
 
   
<TABLE>
<CAPTION>
               SIGNATURES                              TITLE
- ----------------------------------------  --------------------------------
<C>                                       <S>                               <C>
      /s/        MICHAEL W. BROWN         Vice President, Finance; Chief
- ----------------------------------------    Financial Officer (Principal
            Michael W. Brown                Financial and Accounting
                                            Officer)
                   *                      Chairman, Chief Executive
- ----------------------------------------    Officer, Director (Principal
            William H. Gates                Executive Officer)
                   *                      Director
- ----------------------------------------
             Paul G. Allen
                   *                      Director
- ----------------------------------------
             Jill E. Barad
                   *                      Director
- ----------------------------------------
          Richard A. Hackborn
                   *                      Director
- ----------------------------------------
           David F. Marquardt
</TABLE>
    
 
                                      II-4
<PAGE>   39
 
   
<TABLE>
<CAPTION>
               SIGNATURES                              TITLE
- ----------------------------------------  --------------------------------
<S>                                       <C>
                   *                      Director
- ----------------------------------------
           Robert D. O'Brien

                   *                      Director
- ----------------------------------------
          William G. Reed, Jr.

                   *                      Director
- ----------------------------------------
             Jon A. Shirley

*By /s/     MICHAEL W. BROWN
- ----------------------------------------
            Michael W. Brown
            Attorney-in-Fact
</TABLE>
    
 
                                      II-5
<PAGE>   40
 
                               INDEX TO EXHIBITS
 
   
<TABLE>
<CAPTION>
EXHIBIT NO.                              DESCRIPTION                              PAGE OR FOOTNOTE
- -----------   ------------------------------------------------------------------  ----------------
<C>           <S>                                                                 <C>
     1.1      Underwriting Agreement............................................           *
     3.1      Restated Articles of Incorporation................................          (1)
     3.2      Bylaws............................................................          (2)
     4.1      Form of Amendment to the Registrant's Restated Articles of
              Incorporation designating the rights and preferences with respect
              to the Series A Preferred Shares..................................           *
     4.2      Form of Indenture with respect to the      % Convertible
              Subordinated Notes Due 1999.......................................           *
     5.1      Opinion of Preston Gates & Ellis..................................           *
     8.1      Opinion of Preston Gates & Ellis..................................           *
    12.1      Computation of Ratio of Earnings to Fixed Charges.................           *
    13.1      Quarterly and Market Information Incorporated by Reference to Page
              28 of 1996 Annual Report to Shareholders ("1996 Annual Report")...          (3)
    13.2      (Intentionally Omitted)...........................................
    13.3      Management's Discussion and Analysis of Financial Condition and
              Results of Operations Incorporated by Reference to Pages 16-19,
              22, and 23 of 1996 Annual Report..................................          (3)
    13.4      Financial Statements Incorporated by Reference to Pages 1, 15, 20,
              21, 24-29, and 31 of 1996 Annual Report...........................          (3)
    23.1      Consent of Deloitte & Touche LLP..................................
    23.2      Consent of Preston Gates & Ellis..................................          (4)
    24.1      Power of Attorney.................................................        II-4
    25.1      Statement of Eligibility of Trustee...............................           *
</TABLE>
    
 
- ---------------
  * To be filed by amendment.
 
   
(1) Filed previously with the Registrant's Registration Statement on Form S-3
    (Commission File No. 333-17143).
    
 
   
(2) Incorporated by reference to Microsoft's Form 10-K for the fiscal year ended
    June 30, 1994.
    
 
   
(3) Incorporated by reference to Microsoft's Form 10-K for the fiscal year ended
    June 30, 1996.
    
 
   
(4) Contained within Exhibit 5.1.
    

<PAGE>   1
                                                                EXHIBIT 23.1



                         INDEPENDENT AUDITORS' CONSENT



We consent to the incorporation by reference in this Amendment to Registration
Statement No. 333-17143 of Microsoft Corporation on Form S-3 of our report dated
July 22, 1996 appearing in and incorporated by reference in the Annual Report on
Form 10-K of Microsoft Corporation for the year ended June 30, 1996 and to the
reference to Deloitte & Touche LLP under the heading "Experts" in the
Prospectus, which is part of this Registration Statement.






Deloitte & Touche LLP

Seattle, Washington
December 12, 1996


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