AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 19, 2001



                                                      REGISTRATION NO. 333-68922

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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                         ------------------------------


                                AMENDMENT NO. 1
                                       TO
                                    FORM S-3
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933


                         ------------------------------

                                LEGG MASON, INC.
             (Exact name of registrant as specified in its charter)


                                                   
                      MARYLAND                                             52-1200960
(State or other jurisdiction of identification no.)     (I.R.S. employer incorporation or organization)


                                100 LIGHT STREET
                           BALTIMORE, MARYLAND 21202
                                 (410) 539-0000
  (Address, Including Zip Code, and Telephone Number, Including Area Code, of
                   Registrant's Principal Executive Offices)

                         ------------------------------

                             ROBERT F. PRICE, ESQ.
              SENIOR VICE PRESIDENT, SECRETARY AND GENERAL COUNSEL
                                LEGG MASON, INC.
                                100 LIGHT STREET
                           BALTIMORE, MARYLAND 21202
                                 (410) 539-0000
 (Name, Address, Including Zip Code, and Telephone Number, Including Area Code,
                             of Agent for Service)

                         ------------------------------

                                    COPY TO:

                           JAMES S. SCOTT, SR., ESQ.
                              SHEARMAN & STERLING
                              599 LEXINGTON AVENUE
                            NEW YORK, NEW YORK 10022
                                 (212) 848-4000

    APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: From time
to time after the effective date of this Registration Statement as determined by
market conditions.

    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, check the following box: /X/

    If this Registration Statement is filed to register additional securities
for an offering pursuant to Rule 462(b) under the Securities Act, please check
the following box and list the Securities Act registration number of the earlier
effective registration statement for the same offering: / /

    If this Registration Statement is a post-effective amendment filed pursuant
to Rule 462(c) under the Securities Act, check the following box and list the
Securities Act registration statement number of the earlier effective
registration statement for the same offering: / /

    If delivery of the prospectus is expected to be made pursuant to Rule 434,
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 THIS REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION, ACTING
PURSUANT TO SAID SECTION 8(A), MAY DETERMINE.


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PROSPECTUS



                                  $567,285,000
                                LEGG MASON, INC.
                     LIQUID YIELD OPTION-TM- NOTES DUE 2031
                             (ZERO COUPON--SENIOR)
                                      AND
               COMMON STOCK ISSUABLE UPON CONVERSION OF THE LYONS

    We issued the LYONs in a private placement in June 2001 at an issue price of
$440.70 per LYON. This prospectus will be used by selling security holders to
resell their LYONs and the common stock issuable upon conversion of their LYONs.

    We will not pay interest on the LYONs prior to maturity unless contingent
interest becomes payable. Instead, on June 6, 2031, the maturity date of the
LYONs, holders will receive $1,000 per LYON. The issue price of each LYON
represents a yield to maturity of 2.75% per year, calculated from June 6, 2001,
excluding any contingent interest. The LYONs rank equal in right of payment to
all of our existing and future unsecured and unsubordinated indebtedness.


    Prior to maturity, holders may convert their LYONs only if (1) the sale
price of our common stock reaches specified thresholds, (2) during any period in
which the credit rating assigned to the LYONs by either Moody's or Standard &
Poor's is at or below Ba1 or BB, respectively, (3) the LYONs are called for
redemption, or (4) upon the occurrence of certain corporate transactions
described in this prospectus. Each LYON is convertible into 7.7062 shares of
common stock, subject to adjustments. Our common stock is listed on the New York
Stock Exchange under the symbol "LM." On October 17, 2001, the last reported
sale price on the NYSE for our common stock was $43.23 per share.


    We will pay contingent interest in cash to the holders of LYONs during any
six-month period commencing after June 6, 2006 if the average market price of a
LYON for a five-trading-day measurement period preceding such six-month-period
equals 120% or more of the sum of the issue price and accrued original issue
discount for such LYON. The contingent interest payable per LYON in respect of
any quarterly period will equal the greater of (1) regular cash dividends paid
by us per share on our common stock during that quarterly period multiplied by
the then applicable conversion rate or (2) $.090 multiplied by 7.7062. For
United States federal income tax purposes, the LYONs will constitute contingent
payment debt instruments. You should read the discussion of certain United
States federal income tax considerations relevant to the LYONs beginning on
page 34.

    Each holder may require us to repurchase all or a portion of such holder's
LYONs on June 6, 2003 at a price of $465.44 per LYON, on June 6, 2005 at a price
of $491.58 per LYON, on June 6, 2007 at a price of $519.18 per LYON, on June 6,
2011 at a price of $579.11 per LYON, on June 6, 2016 at a price of $663.85 per
LYON, on June 6, 2021 at a price of $760.99 per LYON, or on June 6, 2026 at a
price of $872.35 per LYON. We may choose to pay the purchase price of such LYONs
in cash or common stock or a combination of cash and common stock. In addition,
if a change of control of Legg Mason were to occur on or before June 6, 2006,
each holder may require us to purchase all or a portion of such holder's LYONs
for cash.

    We may redeem for cash all or a portion of the LYONs at any time on or after
June 6, 2006 at the prices set forth in "Description of LYONs--Redemption of
LYONs at the Option of Legg Mason."
                           --------------------------

    INVESTING IN THE LYONS INVOLVES RISKS THAT ARE DESCRIBED IN THE "RISK
FACTORS" SECTION BEGINNING ON PAGE 9 OF THIS PROSPECTUS.
                           --------------------------

    We will not receive any of the proceeds from the sale of the LYONs or shares
of common stock by any of the selling security holders. The LYONs and the shares
of common stock may be offered in negotiated transactions or otherwise, at
market prices prevailing at the time of sale or at negotiated prices. In
addition, our shares of common stock may be offered from time to time through
ordinary brokerage transactions on the New York Stock Exchange. See "Plan of
Distribution." The selling security holders may be deemed to be "underwriters"
as defined in the Securities Act of 1933, as amended. Any profits realized by
the selling security holders may be deemed to be underwriting commissions. If
the selling security holders use any broker-dealers, any commissions paid to
broker-dealers and, if broker-dealers purchase any LYONs or common stock as
principals, any profits received by such broker-dealers on the resale of the
LYONs or common stock, may be deemed to be underwriting discounts or commissions
under the Securities Act.
                           --------------------------

    NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR PASSED UPON THE
ADEQUACY OR ACCURACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
                           --------------------------


                 The date of this prospectus October 19, 2001.

--------------------------
-TM- Trademark of Merrill Lynch & Co., Inc.

                               TABLE OF CONTENTS




                                                                PAGE
                                                              --------
                                                           
WHERE YOU CAN FIND MORE INFORMATION.........................      1
FORWARD-LOOKING INFORMATION.................................      2
SUMMARY.....................................................      3
RISK FACTORS................................................      9
USE OF PROCEEDS.............................................     14
DESCRIPTION OF LYONS........................................     15
DESCRIPTION OF CAPITAL STOCK................................     32
CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS.....     34
SELLING SECURITY HOLDERS....................................     39
PLAN OF DISTRIBUTION........................................     42
LEGAL MATTERS...............................................     44
EXPERTS.....................................................     44



    You should rely only on the information contained or incorporated by
reference in this prospectus. We have not and selling security holders have not,
authorized any other person to provide you with different information. If anyone
provides you with different or inconsistent information, you should not rely on
it. You should assume that the information appearing in this prospectus or any
documents incorporated by reference is accurate only as of the date on the front
cover of the applicable document. Our business, financial condition, results of
operations and prospects may have changed since that date.

    Liquid Yield Option is a registered trademark of Merrill Lynch & Co., Inc.

                                       i

                      WHERE YOU CAN FIND MORE INFORMATION

    We file annual, quarterly and special reports, proxy statements and other
information with the Securities and Exchange Commission. You may read and copy
any document we file at the SEC's public reference rooms at 450 Fifth Street,
N.W., Washington, D.C. 20549 and in New York, New York and Chicago, Illinois.
Please call the SEC at 1-800-SEC-0330 for further information on the public
reference rooms. Our SEC filings are also available to the public from the SEC's
web site at http://www.sec.gov. Our common stock is listed on the New York Stock
Exchange under the Symbol "LM." Information about us also is available at the
exchange.

    This prospectus is part of a registration statement we filed with the SEC.
This prospectus omits some information contained in the registration statement
in accordance with SEC rules and regulations. You should review the information
and exhibits in the registration statement for further information about us and
our consolidated subsidiaries and the securities we are offering. Statements in
this prospectus concerning any document we filed as an exhibit to the
registration statement or that we otherwise filed with the SEC are not intended
to be comprehensive and are qualified by reference to these filings. You should
review the complete document to evaluate these statements.

    The SEC allows us to incorporate by reference much of the information we
file with them. This means that we can disclose important information to you by
referring you to those documents that are considered part of this prospectus.
The information that we incorporate by reference in this prospectus is
considered to be part of this prospectus. Because we are incorporating by
reference future filings with the SEC, this prospectus is continually updated
and those future filings may modify or supersede some of the information
included or incorporated in this prospectus. This means that you must look at
all of the SEC filings that we incorporate by reference to determine if any of
the statements in this prospectus or in any document previously incorporated by
reference have been modified or superseded. We incorporate by reference the
documents listed below and any future filings we make with the SEC under
Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 until
the date on which the selling stockholders cease offering and selling these
securities:

    - Annual Report on Form 10-K for the year ended March 31, 2001;

    - Quarterly Report on Form 10-Q for the quarter ended June 30, 2001;

    - Current Reports on Form 8-K dated May 30, 2001, May 31, 2001, June 1,
      2001, June 26, 2001 and August 1, 2001; and

    - The description of our common stock, par value $.10 per share, contained
      in Amendment No. 5 to our Application for Registration on Form 8-A, filed
      February 23, 2001.

    You may obtain a copy of these filings at no cost, by writing or telephoning
us at the following address:

                                Legg Mason, Inc.
                                100 Light Street
                           Baltimore, Maryland 21202
                           Attn: Corporate Secretary
                                 (410) 539-0000

    Exhibits to these filings will not be sent, however, unless those exhibits
have specifically been incorporated by reference in this document.

                                       1

                          FORWARD-LOOKING INFORMATION

    Certain statements included or incorporated by reference in this document
may be deemed to be "forward-looking statements" within the meaning of
Section 27A of the Securities Act and Section 21E of the Exchange Act. These
statements relate to future events or our future financial performance and
involve known and unknown risks, uncertainties and other factors that may cause
our actual results to be materially different from those expressed or implied by
any forward looking documents. These forward-looking statements may contain
information related, but not limited to:

    - anticipated growth in revenues or earnings per share;

    - anticipated changes in our business or in the amount of client assets
      under management;

    - anticipated expense levels and expectations regarding financial market
      conditions; and

    - anticipated performance of recent, pending and future acquisitions.

    In some cases, you can identify forward looking statements by terminology
such as "may," "will," "could," "would," "should," "expect," "plan,"
"anticipate," "intend," "believe," "estimate," "predict," "potential" or
"continue" or the negative of those terms or other comparable terminology. These
statements are only predictions. Actual events or results may differ materially
due to a number of factors including, but not limited to:

    - the volatile and competitive nature of the financial services industry;

    - changes in domestic and foreign economic and market conditions;

    - the loss of key employees or principals of our current or future operating
      subsidiaries;

    - the effect of current and future federal, state and foreign regulation of
      the financial services industry, including potential liability under
      applicable securities laws;

    - market, credit and liquidity risks associated with our investment
      management, underwriting, securities trading and market-making activities;

    - the impairment of acquired intangible assets and goodwill;

    - potential restrictions on the business of, and withdrawal of capital from,
      certain of our subsidiaries due to net capital requirements; and

    - the effect of any acquisitions.

    Moreover, we do not, nor does any other person, assume responsibility for
the accuracy and completeness of those statements. We have no duty to update any
of the forward-looking statements after the date of this prospectus. In
assessing these forward-looking statements you should carefully consider the
factors discussed under the captions "Risk Factors" in this document,
"Management's Discussion and Analysis of Results of Operations and Financial
Condition--Forward Looking Statements" of our reports on Form 10-Q and
"Business--Factors Affecting the Company and the Financial Services Industry"
and "Management's Discussion and Analysis of Results of Operations and Financial
Condition--Forward-Looking Statements" of our most recent annual report on
Form 10-K, which describe the risks and factors that could cause results to
differ materially from those projected in such forward looking statements.

    We caution the reader that these risk factors may not be exhaustive. We
operate in a continually changing business environment, and new risks emerge
from time to time. Management cannot predict such new risks or the impact of
such new risks on our businesses. Accordingly, forward-looking statements should
not be relied upon as a prediction of actual results.

                                       2

                                    SUMMARY

    The following summary is qualified in its entirety by the more detailed
information included elsewhere or incorporated by reference in this prospectus.
Because this is a summary, it may not contain all the information that is
important to you. You should read the entire prospectus, including the
information incorporated by reference, before making an investment decision.
When used in this prospectus, the terms "Legg Mason," "we," "our," and "us"
refer to Legg Mason, Inc. a Maryland corporation and its consolidated
subsidiaries. However, for purposes of the section entitled "Description of
LYONs," the terms "Legg Mason," "we," "our," and "us" refer only to Legg
Mason, Inc. and not to any of its subsidiaries.

                                LEGG MASON, INC.

    We are a holding company, which, through our subsidiaries, is principally
engaged in providing the following services to individuals, institutions,
corporations and municipalities:

    - asset management;

    - securities brokerage;

    - investment banking; and

    - other related financial services.

    Our principal asset management subsidiaries are:

    - Legg Mason Funds Management, Inc., which manages company-sponsored mutual
      funds;

    - Western Asset Management Company, which manages fixed-income and currency
      assets for institutional clients;

    - Western Asset Management Company Limited, which manages fixed-income and
      currency assets for international clients;

    - Perigee Investment Counsel Inc., which is an institutional investment
      manager in Canada;

    - Private Capital Management, L.P., which is an investment management firm
      for high net worth individuals, families, endowments, foundations and
      selected institutions;

    - Brandywine Asset Management, Inc., which primarily manages equity
      portfolios for institutional clients;

    - Batterymarch Financial Management, Inc., which manages U.S., international
      and emerging markets equity portfolios for institutional clients;

    - Legg Mason Capital Management, Inc., which manages equity portfolios
      primarily for institutional accounts;

    - Bartlett & Co., which manages balanced, equity and fixed-income portfolios
      for high net worth individual and institutional clients;

    - LeggMason Investors Holdings plc, which primarily manages equity retail
      funds in the United Kingdom;

    - Barrett Associates, Inc. (68% owned), which is an asset manager for high
      net worth individuals, families, endowments and foundations;

    - Gray, Seifert & Co., Inc., which primarily manages equity portfolios for
      high net worth individuals and family group, endowment and foundation
      clients; and

    - Berkshire Asset Management, Inc., which primarily manages equity and
      fixed-income portfolios for individual investors and family groups.

                                       3

    Legg Mason Trust, fsb, a federally-chartered unitary thrift institution with
authority to exercise trust powers, provides services as a trustee for trusts
established by individual and employee benefit plan clients and manages
fixed-income and equity assets.


    On October 1, 2001, we completed our acquisition of all of the capital stock
of Royce & Associates, Inc., which manages mutual funds, closed-end funds and
other accounts that invest primarily in small- and micro-cap company stocks,
using a value approach.


    Our principal broker-dealer subsidiary is Legg Mason Wood Walker,
Incorporated, a full service broker-dealer and investment banking firm operating
primarily in the Eastern and Southern regions of the United States.

    Our real estate finance subsidiary is Legg Mason Real Estate Services, Inc,
which is primarily engaged in commercial mortgage banking and loan servicing and
discretionary and non-discretionary management of commercial real estate-related
assets.

    We were incorporated in Maryland in 1981 to serve as a holding company for
Legg Mason Wood Walker, Incorporated and our other subsidiaries. The predecessor
company to Legg Mason Wood Walker, Incorporated was formed in 1970 under the
name Legg Mason & Co. Inc., to combine the operations of Legg & Co., a
Maryland-based broker-dealer formed in 1899, and Mason & Company, Inc., a
Virginia-based broker-dealer formed in 1962. Our subsequent growth has occurred
through internal expansion as well as through our acquisition of asset
management, broker-dealer and commercial mortgage banking firms. Our principal
offices are located at 100 Light Street, Baltimore, Maryland 21202. Our
telephone number is (410) 539-0000.

                                  THE OFFERING


                              
LYONs..........................  $567,285,000 aggregate principal amount at maturity of LYONs
                                 due June 6, 2031. We will not pay interest on the LYONs
                                 prior to maturity unless semiannual interest or contingent
                                 interest becomes payable as described below. Each LYON was
                                 issued at a price of $440.70 per LYON and a principal amount
                                 at maturity of $1,000.

Maturity of LYONs..............  June 6, 2031.

Yield to Maturity of LYONs.....  The issue price of each LYON represents a yield to maturity
                                 of 2.75% per year, computed on a semiannual bond equivalent
                                 basis, calculated from June 6, 2001, excluding any
                                 contingent interest.

Conversion Rights..............  For each LYON surrendered for conversion, a holder will
                                 receive 7.7062 shares of our common stock. The conversion
                                 rate will be adjusted for certain reasons specified in the
                                 indenture, but will not be adjusted for accrued original
                                 issue discount. Upon conversion, a holder will not receive
                                 any cash payment representing accrued original issue
                                 discount. Instead, accrued original issue discount will be
                                 deemed paid by the shares of common stock received by the
                                 holder on conversion.


                                       4



                              
                                 If as of the last day of any calendar quarter, beginning
                                 with the quarter ending September 30, 2001, the closing sale
                                 price of our common stock for at least 20 trading days in a
                                 period of 30 consecutive trading days ending on the last
                                 trading day of such calendar quarter is more than a
                                 specified percentage, beginning at 120% and declining
                                 0.08474% per quarter thereafter to approximately 110% on the
                                 last day of the quarter ending March 31, 2031, of the
                                 accreted conversion price per share of common stock on the
                                 last day of such quarter holders may surrender LYONs for
                                 conversion into shares of common stock. The accreted
                                 conversion price per share as of any day will equal the
                                 issue price of a LYON plus the accrued original issue
                                 discount to that day, divided by the number of shares of
                                 common stock issuable upon a conversion of a LYON on that
                                 day.

                                 Holders may also surrender a LYON for conversion at any time
                                 when the credit rating assigned to the LYONs by either
                                 Moody's or Standard & Poor's is Bal or BB, respectively, or
                                 lower.

                                 LYONs or portions of LYONs in integral multiples of $1,000
                                 principal amount at maturity that have been called for
                                 redemption may be surrendered for conversion until the close
                                 of business on the second business day prior to the
                                 redemption date. In addition, if we make a significant
                                 distribution to our stockholders or if we are a party to
                                 certain consolidations, mergers or binding share exchanges,
                                 LYONs may be surrendered for conversion as provided in
                                 "Description of LYONs -- Conversion Rights." The ability to
                                 surrender LYONs for conversion for any reason will expire at
                                 the close of business on June 5, 2031. See "Description of
                                 LYONs--Conversion Rights."

Ranking........................  The LYONs are unsecured and unsubordinated obligations and
                                 rank equal in right of payment to all our existing and
                                 future unsecured and unsubordinated indebtedness. However,
                                 the LYONs are effectively subordinated to all existing and
                                 future obligations of our subsidiaries.

Original Issue Discount........  We sold our LYONs at an issue price significantly below the
                                 principal amount at maturity of the LYONs. This original
                                 issue discount will accrue daily at a rate of 2.75% per year
                                 beginning on the date of issuance of such LYON, calculated
                                 on a semiannual bond equivalent basis, using a 360-day year
                                 comprised of twelve 30-day months. The accrual of imputed
                                 interest income on the LYONs, as calculated for United
                                 States federal income tax purposes, also referred to herein
                                 as tax original issue discount, is expected to exceed the
                                 accrued original issue discount. See "Certain United States
                                 Federal Income Tax Considerations--Accrual of Interest on
                                 the LYONs."


                                       5



                              
Contingent Interest............  We will pay contingent interest in cash to the holders of
                                 LYONs during any six-month period from June 7 to December 6
                                 and from December 7 to June 6, commencing June 7, 2006, if
                                 the average market price of a LYON for the Applicable Five
                                 Trading Day Period equals 120% or more of the sum of the
                                 issue price and accrued original issue discount for such
                                 LYON to the day immediately preceding the relevant six-month
                                 period. "Applicable Five Trading Day Period" means the five
                                 trading days ending on the second trading day immediately
                                 preceding the relevant six-month period, unless we declare a
                                 dividend for which the record date falls prior to the first
                                 day of a six-month period but the payment date falls within
                                 such six-month period, in which case the "Applicable Five
                                 Trading Day Period" means the five trading days ending on
                                 the second trading day immediately preceding such record
                                 date.

                                 The amount of contingent interest payable per LYON in
                                 respect of any quarterly period within a six-month period in
                                 which contingent interest is payable will equal the greater
                                 of (1) the amount of regular cash dividends paid by us per
                                 share on our common stock during that quarterly period
                                 multiplied by the then applicable conversion rate or (2)
                                 $.090 multiplied by 7.7062.

                                 Contingent interest, if any, will accrue and be payable to
                                 holders of LYONs as of the record date for the related
                                 common stock dividend or, if no cash dividend is paid by us
                                 during a quarter within the relevant six-month period, to
                                 holders of LYONs as of the fifteenth day preceding the last
                                 day of the relevant six-month period. Such payments will be
                                 paid on the payment date of the related common stock
                                 dividend or, if no cash dividend is paid by us during a
                                 quarter within the relevant six-month period, on the last
                                 day of the relevant six-month period. The original issue
                                 discount will continue to accrue at the yield to maturity
                                 whether or not contingent interest is paid.

Tax Original Issue Discount....  The LYONs are debt instruments subject to U.S. Treasury
                                 Department regulations that govern contingent payment debt
                                 regulations. You should be aware that, even if we do not pay
                                 any cash interest (including any contingent or semiannual
                                 interest) on the LYONs, you will be required to include
                                 interest income with respect to the LYONs in your gross
                                 income for United State federal income tax purposes. This
                                 imputed interest, also referred to herein as tax original
                                 issue discount, will accrue at a rate currently estimated at
                                 7.16% per year, computed on a semiannual bond equivalent
                                 basis, which represents the yield we believe we would pay,
                                 as of the original issue date of the LYONs, on
                                 noncontingent, nonconvertible, fixed-rate debt with terms
                                 otherwise similar to the LYONs. The rate at which the tax
                                 original issue discount accrues for United States federal
                                 income tax purposes exceeds the stated yield of 2.75% for
                                 the accrued original issue discount. Your adjusted tax basis
                                 in a LYON will be increased over time to reflect the accrual
                                 of the tax original issue discount and will be decreased to
                                 reflect certain projected payments.


                                       6



                              
                                 You will recognize gain or loss on the sale, exchange,
                                 conversion or redemption of a LYON in an amount equal to the
                                 difference between the amount realized on the sale,
                                 exchange, conversion or redemption of a LYON, including the
                                 fair market value of any common stock received upon
                                 conversion or otherwise, and your adjusted tax basis in the
                                 LYON. Any gain recognized by you on the sale, exchange,
                                 conversion or redemption of a LYON generally will be
                                 ordinary interest income; any loss will be ordinary loss to
                                 the extent of the interest previously included in income,
                                 and thereafter, capital loss. See "Certain United States
                                 Federal Income Tax Considerations."

Sinking Fund...................  None.

Redemption of LYONs at the
  Option of Legg Mason.........  We may redeem all or a portion of the LYONs for cash at any
                                 time on or after June 6, 2006, at the redemption prices set
                                 forth in this prospectus. See "Description of
                                 LYONs--Redemption of LYONs at the Option of Legg Mason."

Purchase of LYONs by Legg Mason
  at the Option of the
  Holder.......................  Holders may require us to purchase all or a portion of their
                                 LYONs:

                                 - on June 6, 2003 at a price of $465.44 per LYON;

                                 - on June 6, 2005 at a price of $491.58 per LYON:

                                 - on June 6, 2007 at a price of $519.18 per LYON;

                                 - on June 6, 2011, at a price of $579.11 per LYON;

                                 - on June 6, 2016, at a price of $663.85 per LYON;

                                 - on June 6, 2021, at a price of $760.99 per LYON; and

                                 - on June 6, 2026, at a price of $872.35 per LYON.

                                 We may choose to pay the purchase price in cash, shares of
                                 common stock or a combination of cash and shares of common
                                 stock. See "Description of LYONs--Purchase of LYONs by Legg
                                 Mason at the Option of the Holder."

Change in Control..............  Upon a change in control (as defined) of Legg Mason
                                 occurring on or before June 6, 2006, each holder may require
                                 us to purchase all or a portion of such holder's LYONs for
                                 cash at a price equal to the issue price of such LYONs plus
                                 accrued original issue discount to the date of purchase. See
                                 "Description of LYONs--Change in Control Permits Holders to
                                 Require Us to Purchase Their LYONs."


                                       7



                              
Optional Conversion to
  Semiannual Coupon Notes upon
  Tax Event....................  From and after the occurrence of a Tax Event, as described
                                 in this prospectus, at the option of Legg Mason, interest
                                 instead of future original issue discount shall accrue on
                                 each LYON from the option exercise date at 2.75% per year on
                                 the restated principal amount and shall be payable
                                 semiannually on each interest payment date to holders of
                                 record at the close of business on each regular record date
                                 immediately preceding such interest payment date. Interest
                                 will be computed on the basis of a 360-day year consisting
                                 of twelve 30-day months and will accrue from the most recent
                                 date to which interest has been paid or, if no interest has
                                 been paid, from the option exercise date. In such event, the
                                 redemption price, purchase price and change in control
                                 purchase price shall be adjusted, and no future contingent
                                 interest will be paid on the LYONs (although, other cash
                                 payments may be payable as a result of a failure to timely
                                 file or make effective a shelf registration statement). If
                                 the LYONs are converted to semiannual coupon notes following
                                 the occurrence of Tax Event, this will not result in any
                                 change in the holder's conversion rights.

Events of Default..............  If there is an event of default on the LYONs, the issue
                                 price of the LYONs plus the accrued original issue discount
                                 may be declared due and payable. These amounts automatically
                                 become due and payable in certain circumstances. See
                                 "Description of LYONs--Events of Default."

Use of Proceeds................  We will not receive any of the proceeds from the sale by any
                                 selling security holder of the LYONs or of the shares of
                                 common stock issuable upon conversion of the LYONs. See "Use
                                 of Proceeds."

DTC Eligibility................  The LYONs were issued in book-entry form and are represented
                                 by one or more permanent global certificates deposited with
                                 a custodian for and registered in the name of a nominee of
                                 DTC in New York, New York. Beneficial interests in any such
                                 securities will be shown on, and transfers will be effected
                                 only through, records maintained by DTC and its direct and
                                 indirect participants and any such interest may not be
                                 exchanged for certificated securities, except in limited
                                 circumstances. See "Description of LYONs--Book-Entry
                                 System."

Trading........................  The LYONs issued in the initial private placement are
                                 eligible for trading in the PORTAL system. However, LYONs
                                 sold pursuant to this prospectus will no longer be eligible
                                 for trading in the PORTAL system. We do not intend to list
                                 the LYONs on any national securities exchange. Our common
                                 stock is traded on the New York Stock Exchange under the
                                 symbol "LM."

Risk Factors...................  Before purchasing any LYONs, you should carefully consider
                                 the factors described in the "Risk Factors" section
                                 beginning on page 9 of this prospectus.


                                       8

                                  RISK FACTORS

    Before purchasing any securities, you should carefully consider the
following risk factors in addition to the other information contained and
incorporated by reference in this prospectus.

                         RISKS RELATED TO THIS OFFERING

    AN ACTIVE TRADING MARKET FOR THE LYONS MAY NOT DEVELOP.

    There is currently no public market for the LYONs. The LYONs will not be
listed on any securities exchange or included in any automated quotation system.
We cannot assure you that an active trading market for the LYONs will develop or
as to the liquidity or sustainability or any such market, the ability of holders
to sell their LYONs or the price at which holders of the LYONs will be able to
sell their LYONs. Future trading prices of the LYONs will depend on many
factors, including prevailing interest rates, the market for similar securities,
the price of our common stock and our performance and other factors.

    WE MAY NOT HAVE THE FUNDS NECESSARY TO PURCHASE LYONS AT THE OPTION OF THE
HOLDERS.

    On June 6, 2003, 2005, 2007, 2011, 2016, 2021 and 2026, holders of LYONs may
require us to purchase their LYONs. However, it is possible that we would not
have sufficient funds at that time to make the required purchase of LYONs. In
such event, we may be required to pay all or a portion of the purchase price in
shares of our common stock, subject to satisfying the conditions in the
indenture for making such payments. If we were unable to satisfy the conditions
in the indenture to use our common stock to pay the purchase price, we could be
in default of our obligations on the LYONs. In addition, if we fail to deliver
our common stock upon a conversion of a LYON and thereafter become the subject
of bankruptcy proceedings, a holder's claim for damages arising from such
failure could be subordinated to all of our existing and future obligations. See
"Description of LYONs--Purchase of LYONs by Legg Mason at the Option of the
Holder."

    THE DEFINITION OF "CHANGE IN CONTROL" DOES NOT INCLUDE ALL IMPORTANT
CORPORATE EVENTS.

    Certain important corporate events, such as leveraged recapitalizations that
would increase the level of our outstanding indebtedness, would not necessarily
constitute a "change in control" under the indenture. See "Description of
LYONs--Change in Control Permits Holders to Require Us to Purchase Their LYONs."

    YOU SHOULD CONSIDER THE UNITED STATES FEDERAL INCOME TAX CONSEQUENCES OF
OWNING LYONS.

    The LYONs will be characterized as our indebtedness for United States
federal income tax purposes. Accordingly, you will be required to include
interest income with respect to the LYONs in your gross income for United States
federal income tax purposes. The LYONs will constitute contingent payment debt
instruments. As a result, you will be required to include amounts in income, as
ordinary income, in advance of the receipt of the cash attributable thereto. The
amount of interest income required to be included by you for each year will be
in excess of the yield to maturity of the LYONs. You will recognize gain or loss
on the sale, purchase by us at your option, conversion or redemption of a LYON
in an amount equal to the difference between the amount realized on such sale,
purchase by us at your option, conversion or redemption, including the fair
market value of any common stock received upon conversion or otherwise, and your
adjusted tax basis in the LYON. Any gain recognized by you on the sale, purchase
by us at your option, conversion or redemption of a LYON generally will be
ordinary interest income; any loss will be ordinary loss to the extent of the
interest previously included in income, and thereafter, capital loss. A summary
of the United States federal income tax consequences of ownership of the LYONs
is described in this prospectus under the heading "Certain United States Federal
Income Tax Considerations."

                                       9

    OUR HOLDING COMPANY STRUCTURE RESULTS IN STRUCTURAL SUBORDINATION AND MAY
AFFECT OUR ABILITY TO MAKE PAYMENTS ON LYONS.

    The LYONs are obligations exclusively of Legg Mason, Inc. We are a holding
company and, accordingly, substantially all of our operations are conducted
through our subsidiaries. As a result, our cash flow and our ability to service
our debt, including the LYONs, depend upon the earnings of our subsidiaries. In
addition, we depend on the distribution of earnings, loans or other payments by
our subsidiaries to us.

    Our subsidiaries are separate and distinct legal entities. Our subsidiaries
have no obligation to pay any amounts due on the LYONs or to provide us with
funds for our payment obligations. In addition, any payment of dividends,
distributions, loans or advances by our subsidiaries to us could be subject to
statutory or contractual restrictions, including regulatory capital
requirements. Payments to us by our subsidiaries will also be contingent upon
our subsidiaries' earnings and business considerations. Our right to receive any
assets of any of our subsidiaries, as an equity holder of such subsidiaries,
upon their liquidation or reorganization, and therefore the right of the holders
of the LYONs to participate in those assets, will be effectively subordinated to
the claims of that subsidiary's creditors, including trade creditors, and to
that subsidiary's preferred stockholders, if any. The LYONs do not restrict the
ability of our subsidiaries to incur additional liabilities, including
indebtedness, or issue preferred stock. In addition, the LYONs are unsecured.
Thus, even if we were a creditor of any of our subsidiaries, our rights as a
creditor would be subordinate to any security interest in the assets of our
subsidiaries and any indebtedness of our subsidiaries senior to that held by us.

                         RISKS RELATED TO OUR BUSINESS

    A DECLINE IN THE PRICES OF SECURITIES COULD LEAD TO DECLINE IN OUR ASSETS
UNDER MANAGEMENT, REVENUES AND EARNINGS.

    A large portion of our revenues are derived from investment advisory
contracts with our clients. Under these contracts, the investment advisory fees
we receive are typically based on the market value of assets under management.
Accordingly, a decline in the prices of securities may cause our revenues and
income to decline by:

    - causing the value of our assets under management to decrease, which would
      result in lower investment advisory fees; or

    - causing our clients to withdraw funds in favor of investments they
      perceive offer greater opportunity or lower risk, which would also result
      in lower investment advisory fees.

    If our revenues decline without a commensurate reduction in our expenses,
our net income will be reduced.

    WE COULD LOSE CLIENTS AND SUFFER A DECLINE IN OUR REVENUES AND EARNINGS IF
THE INVESTMENTS WE CHOOSE PERFORM POORLY, REGARDLESS OF THE TREND IN THE PRICES
OF SECURITIES.

    We believe that investment performance is one of the most important factors
for the growth of our assets under management. Poor investment performance could
impair our revenues and growth because:

    - existing clients might withdraw funds in favor of better performing
      products, which would result in lower investment advisory fees; or

    - our ability to attract funds from existing and new clients might diminish.

    If our revenues decline without a commensurate reduction in our expenses,
our net income will be reduced.

                                       10

    OUR CLIENTS CAN REMOVE THE ASSETS WE MANAGE ON SHORT NOTICE.

    Our investment advisory and administrative contracts are generally
terminable at will or upon relatively short notice, and mutual fund investors
may redeem their investments in the funds at any time without prior notice.
Institutional and individual clients can terminate their relationship with us,
reduce the aggregate amount of assets under management, or shift their funds to
other types of accounts with different rate structures for any of a number of
reasons, including investment performance, changes in prevailing interest rates,
loss of key investment management personnel and financial market performance. In
a declining stock market the pace of mutual fund redemptions could accelerate.
Poor performance relative to other investment management firms tends to result
in decreased purchases of fund shares, increased redemptions of fund shares, and
the loss of institutional or individual accounts. The decrease in revenues that
could result from any such event could have a material adverse effect on our
business.

    OUR LEVERAGE MAY AFFECT OUR BUSINESS AND MAY RESTRICT OUR OPERATING
FLEXIBILITY.

    At July 31, 2001, on a consolidated basis, we had approximately
$1,037 million in total indebtedness and total equity of $983 million. In
addition, we may incur additional indebtedness in the future, possibly to
finance acquisitions. The level of our indebtedness could:

    - limit cash flow available for general corporate purposes due to the
      ongoing cash flow requirements for debt service;

    - limit our ability to obtain additional debt financing in the future or to
      borrow under our existing credit facility (which requires that our debt
      shall not exceed 50% of our total capitalization);

    - limit our flexibility in reacting to competitive and other changes in the
      industry and economic conditions generally;

    - subject us to covenants that limit our flexibility; and

    - place us at a competitive disadvantage compared to our competitors that
      have less debt.

    Our ability to make scheduled payment of principal of, to pay interest on,
or to refinance, our indebtedness and to satisfy our other debt obligations will
depend upon our future operating performance, which may be affected by general
economic, financial, competitive, legislative, regulatory, business and other
factors beyond our control.

    THE FAILURE OF AN ACQUIRED BUSINESS TO PERFORM AS ANTICIPATED COULD HAVE A
NEGATIVE EFFECT ON OUR OPERATIONS. FUTURE ACQUISITIONS COULD BE DILUTIVE TO
STOCKHOLDERS.


    As part of our business strategy, we review acquisitions in the ordinary
course and regularly engage in discussions with respect to potential
acquisitions, some of which may be material. Prior to the acquisitions of
Private Capital Management, L.P. and Royce & Associates, we made two other
acquisitions of businesses for an aggregate price of approximately $236 million
in our fiscal year ending March 31, 2001. We also made acquisitions in the
fiscal year ended March 31, 2000. Acquisitions involve a number of risks and
present financial, managerial and operational challenges, including:


    - existence of unknown liabilities; and

    - potential disputes with the sellers.

Any acquisition increases the risk that any business may lose customers or
employees, including key employees of the acquired business. An acquired
business could underperform relative to our expectations and we may not realize
the value we expect from the acquisition. Adverse market conditions or poor
investment or other performance by an acquired company may adversely affect
revenue and, in the case of an asset manager, its assets under management. We
could also experience financial or other setbacks if an acquired company has
problems of which we are not aware. Future

                                       11

acquisitions may further increase our leverage or, if we issue equity securities
to pay for the acquisitions, dilute the holdings of our existing stockholders.

    THE LOSS OF KEY PERSONNEL AND ANY INABILITY TO ATTRACT AND RETAIN QUALIFIED
EMPLOYEES COULD MATERIALLY ADVERSELY IMPACT OUR OPERATIONS.

    We are dependent on the continued services of our management team, including
our Chief Executive Officer. The loss of such personnel without adequate
replacement could have a material adverse effect on us. Additionally, we need
qualified managers and skilled employees with financial services experience in
order to operate our business successfully. If we are unable to attract and
retain qualified individuals or our costs to do so increase significantly, our
operations would be materially adversely affected.

    THE FINANCIAL SERVICES INDUSTRY IS SUBJECT TO SUBSTANTIAL FLUCTUATIONS DUE
TO SHORT TERM FACTORS AND OVER THE LONG RUN DUE TO EVENTS AND CHANGES IN
NATIONAL AND INTERNATIONAL POLITICS, BUSINESS AND FINANCIAL TRENDS AND INTEREST
RATE MOVEMENTS.

    There are substantial fluctuations in volume and price levels of securities
transactions in the financial services industry. These fluctuations can occur on
a daily basis and over longer periods as a result of national and international
economic and political events, broad trends in business and finance, and
interest rate movements. Reduced volume and prices generally result in lower
brokerage and investment banking revenues, trading losses as both principal and
underwriter and loss or reduction in incentive and performance fees. In periods
of reduced volume, profitability is adversely affected because fixed costs
remain relatively unchanged. To the extent that purchase of securities are
permitted to be made on margin, securities firms also are subject to risks
inherent in extending credit. These risks are particularly high during periods
of rapidly declining markets because a market's decline could reduce collateral
value below the amount of a customer's indebtedness. The business cycles of our
different operations and subsidiaries may occur contemporaneously. Consequently,
the effect of an economic downturn may have a magnified negative effect on our
business. In a period of reduced margin usage by clients, our interest profit
may be adversely affected. In the past, heavy trading volume has caused
clearance and processing problems for securities firms, and this could occur in
the future. In addition, securities firms face risk of loss from errors that can
occur in the execution and settlement process.

    DIFFICULTIES PRESENTED BY INTERNATIONAL ECONOMIC, POLITICAL, LEGAL,
ACCOUNTING AND BUSINESS FACTORS COULD NEGATIVELY AFFECT OUR INTERESTS AND
BUSINESS EFFORT.

    A number of our subsidiaries operate in Canada and the United Kingdom on
behalf of Canadian and UK clients. Our international operations require us to
comply with the legal requirements of foreign jurisdictions and expose us to the
political consequences of operating in foreign jurisdictions. Our foreign
business operations are also subject to the following risks:

    - difficulty in managing, operating and marketing our international
      operations;

    - fluctuations in currency exchange rates which may result in substantial
      negative effects on assets under management; and

    - significant adverse changes in foreign legal and regulatory environments.

    FAILURE TO KEEP UP WITH THE ADMINISTRATIVE WORKLOAD ASSOCIATED WITH HIGH
TRANSACTION VOLUME COULD SUBJECT US TO DISCIPLINARY ACTION AND CLIENT CLAIMS.

    There is considerable fluctuation during any year and from year to year in
the volume of transactions we must process. We record transactions and post our
books on a daily basis. Operations personnel monitor day-to-day operations to
determine compliance with applicable laws, rules and

                                       12

regulations. Failure to keep current and accurate books and records can render
us liable to disciplinary action by governmental and self-regulatory
authorities, as well as to claims by our clients.

    TECHNOLOGY SPENDING MAY HAMPER FUTURE PROFITABILITY AND MAY BE INSUFFICIENT
TO MAINTAIN OUR COMPETITIVE POSITION.

    During the past several years, we have increased expenditures on technology,
particularly as it relates to expanding our client support and building new
business opportunities using the Internet. We may continue to incur substantial
future costs in the form of additional spending on technology. There is no
guarantee that any benefit will accrue to us as the result of past, present and
future technology spending and such spending may have an adverse effect on our
profitability. Moreover, it is possible that our technology may prove
insufficient in relation to our competition, thus adversely affecting our future
business prospects.

    COMPETITION MAY ADVERSELY AFFECT FINANCIAL AND OPERATING PERFORMANCE.

    The financial services business we are engaged in are extremely competitive.
Competition includes numerous national, regional and local asset management
firms and broker-dealer, and commercial bank and thrift institutions. Many of
these organizations have substantially more personnel and greater financial
resources than we do. Discount brokerage firms oriented to the retail market,
including firms affiliated with banks and mutual fund organizations and on-line
brokerage firms, are devoting substantial funds to advertising and direct
solicitation of customers in order to increase their share of commission dollars
and other securities-related income. We also compete for investment funds with
banks, insurance companies and investment companies.

    The financial services industry has undergone considerable consolidation,
resulting in many cases in firms with greater financial resources than us. In
addition, a number of heavily capitalized companies that were not previously
engaged in the financial services industry have made investments in and acquired
financial services firms. Increasing competitive pressures in the financial
services industry require us to offer our customers many of the financial
services that are provided by much larger financial services firms that have
substantially greater resources than us. A sizable number of new asset
management firms and mutual funds have been established in recent years,
increasing competition in that area of our activities.

    An increasing number of firms that offer discount brokerage services to
retail customers have been established in recent years. Included in these firms
are on-line brokerage firms and affiliates of banks and mutual fund
organizations. These firms generally effect transactions at substantially lower
commission rates on an "execution only" basis, including through the Internet,
without offering other services like investment and financial advice and
research that are provided by "full-service" brokerage firms such as us. Some of
these discount brokerage firms have increased the range of services that they
offer. Continued increases in the number of discount brokerage firms and
services provided by these firms may adversely affect us.

    In addition, some full-service brokerage firms have begun to provide to
customers discount services, including on-line trading over the Internet. In
response to the substantial recent growth in the availability of, and investor
demand for, on-line securities trading, we began to offer our clients the
ability to execute certain transactions on-line during fiscal year 2000. Our
retail business may be adversely affected by the growing demand for and
availability of on-line securities trading, including our provision of on-line
trading services at competitive prices.

    Certain institutions, notably commercial banks and thrift institutions, have
become a competitive factor in the securities industry by offering investment
banking and corporate and individual financial services traditionally provided
only by securities firms. Commercial banks, generally, are expanding their
securities activities and their activities relating to the provision of
financial services, and are deriving more revenue from these activities. In
addition, in November 1999, legislation was passed that

                                       13

effectively repealed certain laws that separated commercial banking, securities
firms and investment banking and insurance activities. This legislation allows
commercial banks, securities firms and insurance firms to affiliate, which may
accelerate consolidation and lead to increasing competition in markets
traditionally dominated by investment banks and retail securities firms.
Continued expansion of the type and extent of competitive services that banks
and other institutions offer, or further repeal or modification of
administrative or legislative barriers may adversely affect securities firms
such as us that are heavily oriented to individual retail customers.

    WE ARE SUBJECT TO EXTENSIVE REGULATIONS.

    Our U.S. asset management subsidiaries and sponsored mutual funds are
subject to extensive federal regulation by the SEC and are also required to make
notice filings in certain states. Possible sanctions which may be imposed for
such failure include the suspension of individual employees, limitation on the
asset management subsidiary engaging in the asset management business for
specified periods of time, the revocation of registration and other censures and
fines. A regulatory proceeding, regardless of whether it results in a sanction,
can require substantial expenditures, and can have an adverse effect on our
reputation.

    Broker-dealers are subject to regulations that cover all aspects of the
securities industry. Additional legislation, changes in rules promulgated by the
SEC and self-regulatory authorities, or changes in the interpretation or
enforcement of existing laws and rules, may directly affect the mode of
operation and profitability of broker-dealers. The SEC, self-regulatory
authorities and state securities commissions may conduct administrative
proceedings that can result in censure, fine, suspension or expulsion of a
broker-dealer, its officers or employees. Such administrative proceedings,
whether or not resulting in adverse findings, can require substantial
expenditures and can have an adverse impact on the reputation of a
broker-dealer.

    Our broker-dealer subsidiaries are required by federal law to belong to the
SIPC. If the SIPC fund were to fall below a certain amount, we would be required
to pay annual assessments of up to 1% of adjusted gross revenues.

    DIFFICULTY IN MEETING NET CAPITAL REQUIREMENTS MAY ADVERSELY AFFECT OUR
ABILITY TO MAINTAIN OR GROW OUR BUSINESS.

    The SEC and the NYSE have stringent rules with respect to the net capital
requirements of securities firms. Compliance with applicable net capital rules
could limit operations of our broker-dealer-subsidiaries, particularly
operations such as underwriting and trading activities that require use of
significant amounts of capital. A significant operating loss or extraordinary
charge against net capital may adversely affect the ability of our broker-dealer
subsidiaries to expand or even maintain their present levels of business.

    MANY ASPECTS OF OUR BUSINESS INVOLVE SUBSTANTIAL RISKS OF LIABILITY.

    In the normal course of business, our subsidiaries have been named as
defendants or co-defendants in lawsuits seeking substantial damages. We are also
involved from time to time in governmental and self-regulatory agency
investigations and proceedings. There has been an increased incidence of
litigation in the financial services industry in recent years, including
customer claims as well as class action suits seeking substantial damages.

                                USE OF PROCEEDS

    We will not receive any proceeds from the sale by any selling security
holders of the LYONs or the underlying common stock.

                                       14

                              DESCRIPTION OF LYONS

    The LYONs were issued under an indenture, dated June 6, 2001, between us and
The Bank of New York, as trustee. The following summary is not complete, and is
subject to, and qualified by reference to, all of the provisions of the LYONs
and the indenture. As used in this description, the words "we," "us," "our" or
"Legg Mason" do not include any current or future subsidiary of Legg
Mason, Inc.

GENERAL

    On June 6, 2001, we issued $567,285,000 aggregate principal amount at
maturity of LYONs in a private placement. The LYONs will mature on June 6, 2031.
The principal amount at maturity of each LYON is $1,000. The LYONs are payable
at the office of the paying agent, which initially will be an office or agency
of the trustee, or an office or agency maintained by us for such purpose, in the
Borough of Manhattan, The City of New York. We sold the LYONs at a substantial
discount from their principal amount at maturity. Except as described below, we
will not make periodic payments of interest on the LYONs, other than contingent
interest payments, if any. Each LYON was issued at an issue price of $440.70 per
LYON. The LYONs accrue original issue discount while they remain outstanding.

    Original issue discount is the difference between the issue price and the
principal amount at maturity of a LYON. The calculation of the accrual of
original issue discount will be on a semiannual bond equivalent basis using a
360-day year consisting of twelve 30-day months. The issue date for the LYONs,
and the commencement date for the accrual of original issue discount, was
June 6, 2001.

    Maturity, conversion, purchase by us at the option of a holder or redemption
of a LYON causes original issue discount and interest, if any, to cease to
accrue on that LYON. We may not reissue a LYON that has matured or been
converted, purchased by us at the option of a holder, redeemed or otherwise
cancelled, except for registration of transfer, exchange or replacement of such
LYON.

    LYONs may be presented for conversion at the office of the conversion agent,
and for exchange or registration of transfer at the office of the registrar,
each such agent initially being the trustee. No service charge will be made for
any registration of transfer or exchange of LYONs. However, we may require the
holder to pay any tax, assessment or other governmental charge payable as a
result of such transfer or exchange.

    The LYONs are debt instruments subject to U.S. Treasury Department
regulations that govern contingent payment debt instruments. The LYONs were
issued with original issue discount for United States federal income tax
purposes, referred to herein as tax original issue discount. Even if we do not
pay any cash interest (including any contingent interest) on the LYONs, holders
are required to include accrued tax original issue discount in their gross
income for United States federal income tax purposes, and to be bound by our
application of the contingent payment debt regulations, including our
determination that the rate at which interest will be deemed to accrue for
federal income tax purposes will be 7.16%, which we have determined to be the
rate comparable to the fixed rate at which we would borrow on a noncontingent,
nonconvertible debt security. Accordingly, each holder will be required to
accrue interest on a constant yield to maturity basis at that rate, with the
result that a holder will recognize taxable income significantly in excess of
cash received while the LYONs are outstanding and significantly in excess of the
stated yield of 2.75%.

    In addition, a holder will recognize ordinary income upon a conversion of a
LYON into our common stock. However, the proper United States federal income tax
treatment of a holder of a LYON is uncertain in various respects. See "Certain
United States Federal Income Tax Considerations."

                                       15

BOOK-ENTRY SYSTEM

    The LYONs are issued in the form of global securities held in book-entry
form. DTC or its nominee is the sole registered holder of the LYONs for all
purposes under the indenture. Owners of beneficial interests in the LYONs
represented by the global securities hold their interests pursuant to the
procedures and practices of DTC. As a result, beneficial interests in any such
securities are shown on, and transfers will be effected only through, records
maintained by DTC and its direct and indirect participants and any such interest
may not be exchanged for certificated securities, except in limited
circumstances. Owners of beneficial interests must exercise any rights in
respect of their interests, including any right to convert or require purchase
of their interests in the LYONs, in accordance with the procedures and practices
of DTC. Beneficial owners are not holders and are not entitled to any rights
provided to the holders of LYONs under the global securities or the indenture.
Legg Mason and the trustee, and any of their respective agents, may treat DTC as
the sole holder and registered owner of the global securities.

EXCHANGE OF GLOBAL SECURITIES

    LYONs represented by one or more global securities are exchangeable for
certificated securities in registered form with the same terms only if:

    - DTC is unwilling or unable to continue as depositary or if DTC ceases to
      be a clearing agency registered under the Exchange Act and a successor
      depositary is not appointed by us within 90 days;

    - we decide to discontinue use of the system of book-entry transfer through
      DTC (or any successor depositary); or

    - a default under the indenture occurs and is continuing.

    We understand that DTC is a limited-purpose trust company organized under
the New York Banking Law, a "banking organization" within the meaning of the New
York Uniform Commercial Code, and a "clearing agency" registered pursuant to the
provisions of Section 17A of the Exchange Act. DTC facilitates the settlement of
transactions among its participants through electronic computerized book-entry
changes in participants' accounts, eliminating the need for physical movement of
securities certificates. DTC's participants include securities brokers and
dealers, banks, trust companies, clearing corporations and other organizations,
some of whom and/or their representatives own DTC.

    Access to DTC's book-entry system is also available to others, such as
banks, brokers, dealers and trust companies that clear through or maintain a
custodial relationship with a participant, either directly or indirectly.

RANKING OF LYONS

    The LYONs are unsecured and unsubordinated obligations. The LYONs rank equal
in right of payment to all of our existing and future unsecured and
unsubordinated indebtedness. However, we are a holding company and the LYONs are
effectively subordinated to all existing and future obligations of our
subsidiaries. See "Risk Factors--Our holding company structure results in
structural subordination and may affect our ability to make payments on LYONs."
In addition, if we fail to deliver our common stock upon a conversion of a LYON
and thereafter become the subject of bankruptcy proceedings, a holder's claim
for damages arising from such failure could be subordinated to all of our
existing and future obligations and those of our subsidiaries.

                                       16

    As of July 31, 2001, we had approximately $775 million of senior
indebtedness outstanding (including the LYONs), all of which ranks equally with
the LYONs, and our subsidiaries had an aggregate of approximately $3.7 billion
of liabilities, including trade payables, outstanding.

CONVERSION RIGHTS

    The initial conversion rate is 7.7062 shares of common stock per LYON,
subject to adjustment upon the occurrence of certain events described below. A
holder of a LYON otherwise entitled to a fractional share will receive cash in
an amount equal to the value of such fractional share based on the sale price,
as defined below, on the trading day immediately preceding the conversion date.

    CONVERSION RIGHTS BASED ON COMMON STOCK PRICE.  If, as of the last day of
any calendar quarter beginning with the quarter ending September 30, 2001, the
sale price (as defined below) of our common stock for at least 20 trading days
in a period of 30 consecutive trading days ending on the last trading day of
such quarter is more than a specified percentage (beginning at 120% and
declining .08474% per quarter thereafter to approximately 110% on the last day
of the quarter ending March 31, 2031) of the accreted conversion price per share
of common stock on the last day of such quarter, then on and after the first day
of the following quarter, holders may surrender LYONs for conversion into shares
of common stock at any time at their option until the close of business on the
business day immediately preceding May 23, 2031. If the LYONs become convertible
pursuant to this provision, they will remain convertible regardless of future
changes in the sales prices of our common stock. The accreted conversion price
per share as of any day will equal the sum of the issue price of a LYON plus the
accrued original issue discount to that day, with the sum divided by the number
of shares of common stock issuable upon a conversion of a LYON (the "conversion
trigger price").

    The table below shows the conversion trigger price per share of our common
stock in respect of each of the first 20 calendar quarters. These prices reflect
the accreted conversion price per share of common stock multiplied by the
applicable percentage for the respective calendar quarter. Thereafter, the
accreted conversion price per share of common stock increases each calendar
quarter by the accreted original issue discount for the quarter and the
applicable percentage declines by .08474 percentage points per quarter. The
conversion trigger price for the calendar quarter beginning April 1, 2031 is
$142.04.



                                                                                          (3)
                                                                (1)                    CONVERSION
                                                              ACCRETED       (2)        TRIGGER
                                                             CONVERSION   APPLICABLE     PRICE
QUARTER*                                                       PRICE      PERCENTAGE    (1 X 2)
--------                                                     ----------   ----------   ----------
                                                                              
2001
  Fourth Quarter...........................................    $57.69     120.0000%      $68.23
2002
  First Quarter............................................     58.08     119.9153%       69.65
  Second Quarter...........................................     58.48     119.8305%       70.08
  Third Quarter............................................     58.88     119.7458%       70.51
  Fourth Quarter...........................................     59.29     119.6610%       70.94
2003
  First Quarter............................................     59.69     119.5763%       71.38
  Second Quarter...........................................     60.10     119.4916%       71.82
  Third Quarter............................................     60.51     119.4068%       72.26
  Fourth Quarter...........................................     60.93     119.3221%       72.70


                                       17




                                                                                          (3)
                                                                (1)                    CONVERSION
                                                              ACCRETED       (2)        TRIGGER
                                                             CONVERSION   APPLICABLE     PRICE
QUARTER*                                                       PRICE      PERCENTAGE    (1 X 2)
--------                                                     ----------   ----------   ----------
                                                                              
2004
  First Quarter............................................     61.35     119.2373%       73.15
  Second Quarter...........................................     61.77     119.1526%       73.60
  Third Quarter............................................     62.19     119.0679%       74.05
  Fourth Quarter...........................................     62.62     118.9831%       74.50
2005
  First Quarter............................................     63.04     118.8984%       74.96
  Second Quarter...........................................     63.48     118.8136%       75.42
  Third Quarter............................................     63.91     118.7289%       75.88
  Fourth Quarter...........................................     64.35     118.6442%       76.35
2006
  First Quarter............................................     64.79     118.5594%       76.81
  Second Quarter...........................................     65.23     118.4747%       77.29
  Third Quarter............................................     65.68     118.3899%       77.76


------------------------

*   This table assumes no events have occurred that would require an adjustment
    to the conversion rate.

    CONVERSION BASED ON CREDIT RATINGS.  Holders may also surrender a LYON for
conversion at any time when the credit rating assigned to the LYONs by either
Moody's or Standard & Poor's is Ba1 or BB, respectively, or lower.

    CONVERSION UPON NOTICE OF REDEMPTION.  A holder may surrender for conversion
a LYON that has been called for redemption at any time prior to the close of
business on the second business day immediately preceding the redemption date,
even if it is not otherwise convertible at that time. A LYON for which a holder
has delivered a purchase notice or a change in control purchase notice as
described below requiring us to purchase the LYON may be surrendered for
conversion only if that notice is withdrawn in accordance with the indenture.

    CONVERSION UPON OCCURRENCE OF CERTAIN CORPORATE TRANSACTIONS.  If we are
party to a consolidation, merger or binding share exchange pursuant to which our
shares of common stock would be converted into cash, securities or other
property, the LYONs may be surrendered for conversion at any time from and after
the date which is 15 days prior to the anticipated effective date of the
transaction until 15 days after the actual date of such transaction and, at the
effective time, the right to convert a LYON into shares of common stock will be
changed into a right to convert it into the kind and amount of cash, securities
or other property of Legg Mason or another person which the holder would have
received if the holder had converted the holder's LYON immediately prior to the
transaction. If such transaction also constitutes a change in control, as
defined in the indenture, the holder will be able to require us to purchase all
or a portion of such holder's LYONs as described under "--Change in Control
Permits Holders to Require Us to Purchase Their LYONs."

    On conversion of a LYON, a holder will not receive any cash payment of
interest representing accrued original issue discount or, except as described
below, contingent interest or semiannual interest.

                                       18

    Our delivery to the holder of the full number of shares of common stock into
which the LYON is convertible, together with any cash payment for such holder's
fractional shares, will be deemed:

    - to satisfy our obligation to pay the principal amount at maturity of the
      LYON; and

    - to satisfy our obligation to pay accrued original issue discount
      attributable to the period from the issue date through the conversion
      date, as well as any obligation to pay contingent interest or semiannual
      interest not paid in cash.

    As a result, accrued original issue discount is deemed to be paid in full
rather than cancelled, extinguished or forfeited.

    If contingent or semiannual interest is payable to holders of LYONs during
any particular six-month period, and LYONs are converted after the applicable
accrual or record date therefor and prior to the next succeeding interest
payment date, those LYONs upon surrender for conversion must be accompanied by
funds equal to the amount of contingent or semiannual interest payable on the
principal amount of LYONs so converted, unless such LYONs are converted after
they have been called for redemption, in which case no such payment shall be
required by the holder and the holder will receive a cash payment for all
accrued and unpaid contingent interest or semiannual interest to the redemption
date.

    The conversion rate will not be adjusted for accrued original issue discount
or any contingent interest. A certificate for the number of full shares of
common stock into which any LYON is converted, together with any cash payment
for fractional shares, will be delivered through the conversion agent as soon as
practicable following the conversion date. For a discussion of the tax treatment
of a holder receiving shares of common stock upon conversion, see "Certain
United States Federal Income Tax Considerations--Sale, Exchange, Conversion or
Redemption."

    To convert a LYON into shares of common stock, a holder must:

    - complete and manually sign the conversion notice on the back of the LYON
      or complete and manually sign a facsimile of the conversion notice and
      deliver the conversion notice to the conversion agent;

    - surrender the LYON to the conversion agent;

    - if required by the conversion agent, furnish appropriate endorsements and
      transfer documents; and

    - if required, pay all transfer or similar taxes.

    Pursuant to the indenture, the date on which all of the foregoing
requirements have been satisfied is the conversion date.

    The conversion rate will be adjusted for:

    - dividends or distributions on our shares of common stock payable in shares
      of common stock or other capital stock of Legg Mason;

    - subdivisions, combinations or certain reclassifications of shares of our
      common stock;

    - distributions to all holders of shares of our common stock of certain
      rights to purchase shares of our common stock for a period expiring within
      60 days of the record date for such distribution at less than the sale
      price of our common stock at the time; and

    - distributions to the holders of our common stock of our assets or debt
      securities or certain rights to purchase our securities (excluding cash
      dividends or other cash distributions from current or retained earnings
      other than extraordinary cash dividends).

                                       19

    "Extraordinary cash dividends" means the amount of any cash dividend or
distribution that, together with all other cash dividends paid during the
preceding 12-month period, are on a per share basis in excess of the sum of
(i) 5% of the sale price of the shares of common stock on the day preceding the
date of declaration of such dividend or distribution, and (ii) the quotient of
the amount of any contingent interest paid on a LYON during such 12-month period
divided by the number of shares of common stock issuable upon conversion of a
LYON at the conversion rate in effect on the payment date of such contingent
interest.

    In the event that we pay a dividend or make a distribution on shares of our
common stock consisting of capital stock of, or similar equity interests in, a
subsidiary or other business unit of ours, the conversion rate will be adjusted
based on the market value of the securities so distributed relative to the
market value of our common stock, in each case based on the average closing
prices of those securities for the 10 trading days commencing on and including
the fifth trading day after the date on which "ex-dividend trading" commences
for such dividend or distribution on the principal United States securities
exchange or market on which the securities are then listed or quoted. In the
event we elect to make a distribution described in the third or fourth bullet of
the preceding paragraph which, in the case of the fourth bullet, has a per share
value equal to more than 15% of the sale price of our shares of common stock on
the day preceding the declaration date for such distribution, we will be
required to give notice to the holders of LYONs at least 20 days prior to the
ex-dividend date for such distribution and, upon the giving of such notice, the
LYONs may be surrendered for conversion at any time until the close of business
on the business day prior to the ex-dividend date or until we announce that such
distribution will not take place.

    No adjustment to the conversion rate or the ability of a holder of a LYON to
convert will be made if holders of LYONs will participate in the transaction
without conversion or in certain other cases. The indenture permits us to
increase the conversion rate from time to time.

    In the event of:

    - a taxable distribution to holders of shares of common stock which results
      in an adjustment of the conversion rate; or

    - an increase in the conversion rate at our discretion,

the holders of LYONs may, in certain circumstances, be deemed to have received a
distribution subject to United States federal income tax as a dividend. See
"Certain United States Federal Income Tax Considerations--Constructive
Dividends."

    Upon determination that LYON holders are or will be entitled to convert
their LYONs into shares of common stock in accordance with the foregoing
provisions, we will issue a press release and publish such determination on our
web site.

CONTINGENT INTEREST

    Subject to the accrual and record date provisions described below, we will
pay contingent interest to the holders of LYONs during any six-month period from
June 7 to December 6 and from December 7 to June 6, commencing June 7, 2006, if
the average market price of a LYON for the Applicable Five Trading Day Period
equals 120% or more of the sum of the issue price and accrued original issue
discount for such LYON to the day immediately preceding the relevant six-month
period. See "--Redemption of LYONs at the Option of Legg Mason" for some of
these values.

    "Applicable Five Trading Day Period" means the five trading days ending on
the third trading day immediately preceding the first day of the relevant
six-month period, unless we declare a dividend for which the record date falls
prior to the first day of a six month period but the payment date falls within

                                       20

such six-month period, in which case the "Applicable Five Trading Day Period"
means the five trading days ending on the third trading day immediately
preceding such record date.

    The amount of contingent interest payable per LYON in respect of any
quarterly period within a six-month period in which contingent interest is
payable will equal the greater of (a) regular cash dividends paid by us per
share on our common stock during that quarterly period multiplied by the number
of shares of common stock issuable upon conversion of a LYON at the then
applicable conversion rate or (b) $.090 multiplied by 7.7062. Contingent
interest, if any, will accrue and be payable to holders of LYONs as of the
record date for the related common stock dividend or, if no cash dividend is
paid by us during a quarter within the relevant six-month period, to holders of
LYONs as of the fifteenth day preceding the last day of the relevant six-month
period. Such payments will be paid on the payment date of the related common
stock dividend or, if no cash dividend is paid by us during a quarter within the
relevant six-month period, on the last day of the relevant six-month period. The
original issue discount on the LYONs will continue to accrue at the yield to
maturity whether or not contingent interest is paid.

    Regular cash dividends are quarterly or other periodic cash dividends on our
common stock as declared by our board of directors as part of its cash dividend
payment practices and that are not designated by them as extraordinary or
special or other nonrecurring dividends.

    The market price of a LYON on any date of determination means the average of
the secondary market bid quotations per LYON obtained by the bid solicitation
agent for $10 million principal amount at maturity of LYONs at approximately
4:00 p.m., New York City time, on such determination date from three
unaffiliated securities dealers we select, provided that if:

    - at least three such bids are not obtained by the bid solicitation agent,
      or

    - in our reasonable judgment, the bid quotations are not indicative of the
      secondary market value of the LYONs, then the market price of the LYON
      will equal (a) the then applicable conversion rate of the LYONs multiplied
      by (b) the average sale price of our common stock on the five trading days
      ending on such determination date, appropriately adjusted.

    The bid solicitation agent will initially be The Bank of New York. We may
change the bid solicitation agent, but the bid solicitation agent will not be
our affiliate. The bid solicitation agent will solicit bids from securities
dealers that are believed by us to be willing to bid for the LYONs.

    Upon determination that LYON holders will be entitled to receive contingent
interest which may become payable during a relevant six-month period, on or
prior to the start of such six-month period, we will issue a press release which
we will also post on our web site.

REDEMPTION OF LYONS AT THE OPTION OF LEGG MASON

    No sinking fund is provided for the LYONs. Prior to June 6, 2006, the LYONs
will not be redeemable at our option. Beginning on June 6, 2006, we may redeem
the LYONs for cash as a whole at any time, or in part from time to time. We will
give not less than 30 days' or more than 60 days' notice of redemption by mail
to holders of LYONs. LYONs or portions of LYONs called for redemption will be
convertible by the holder, even if the market price contingency described under
"Conversion Rights" has not occurred, until the close of business on the second
business day prior to the redemption date. The table below shows redemption
prices of a LYON on June 6, 2006, at each June 6 thereafter prior to maturity
and at maturity on June 6, 2031. These prices reflect the accrued original issue
discount calculated to each such date. The redemption price of a LYON redeemed
between such dates would include an additional amount reflecting the additional
original issue discount accrued since the next preceding date in the table.

                                       21




                                                          (1)             (2)                (3)
                                                         LYON       ACCRUED ORIGINAL   REDEMPTION PRICE
REDEMPTION DATE                                       ISSUE PRICE    ISSUE DISCOUNT       (1) + (2)
---------------                                       -----------   ----------------   ----------------
                                                                              
June 6:
2006................................................    $440.70         $ 69.49           $  505.19
2007................................................     440.70           78.48              519.18
2008................................................     440.70           92.85              533.55
2009................................................     440.70          107.63              548.33
2010................................................     440.70          122.81              563.51
2011................................................     440.70          138.41              579.11
2012................................................     440.70          154.45              595.15
2013................................................     440.70          170.93              611.63
2014................................................     440.70          187.86              628.56
2015................................................     440.70          205.27              645.97
2016................................................     440.70          223.15              663.85
2017................................................     440.70          241.53              682.23
2018................................................     440.70          260.42              701.12
2019................................................     440.70          279.84              720.54
2020................................................     440.70          299.79              740.49
2021................................................     440.70          320.29              760.99
2022................................................     440.70          341.37              782.07
2023................................................     440.70          363.02              803.72
2024................................................     440.70          385.27              825.97
2025................................................     440.70          408.15              848.85
2026................................................     440.70          431.65              872.35
2027................................................     440.70          455.80              896.50
2028................................................     440.70          480.63              921.33
2029................................................     440.70          506.14              946.84
2030................................................     440.70          532.36              973.06
2031................................................     440.70          559.30            1,000.00


    If converted to semiannual coupon notes following the occurrence of a Tax
Event, the notes will be redeemable at the restated principal amount plus
accrued and unpaid interest from the date of the conversion to, but not
including, the redemption date. However, in no event will we have the option to
redeem the LYONs or notes prior to June 6, 2006. See "--Optional Conversion to
Semiannual Coupon Note upon Tax Event."

    In addition to the redemption prices payable with respect to all LYONs
redeemed, on the redemption date we will pay any unpaid contingent interest or
semiannual interest accrued with respect to such LYONs, in cash, to the
redemption date.

    If we redeem less than all of the outstanding LYONs, the trustee shall
select the LYONs to be redeemed in principal amounts at maturity of $1,000 or
integral multiples of $1,000 by lot, pro rata or by any other method the trustee
considers fair and appropriate. If a portion of a holder's LYONs is selected for
partial redemption and the holder converts a portion of the LYONs, the converted
portion shall be deemed to be the portion selected for redemption.

PURCHASE OF LYONS BY LEGG MASON AT THE OPTION OF THE HOLDER

    On the dates specified below holders may require us to purchase any
outstanding LYON for which a written purchase notice has been properly delivered
by the holder and not withdrawn, subject to certain additional conditions.
Holders may submit their written purchase notice and LYONs for

                                       22

purchase to the paying agent at any time from the opening of business on the
date that is 20 business days prior to such purchase date until the close of
business on such purchase date.

    The purchase price of a LYON on the relevant purchase date will be:

    - $465.44 per LYON on June 6, 2003;

    - $491.58 per LYON on June 6, 2005;

    - $519.18 per LYON on June 6, 2007;

    - $579.11 per LYON on June 6, 2011;

    - $663.85 per LYON on June 6, 2016;

    - $760.99 per LYON on June 6, 2021; and

    - $872.35 per LYON on June 6, 2026.

    These purchase prices equal the issue price plus accrued original issue
discount to the purchase dates. We may, at our option, elect to pay the purchase
price in cash, shares of common stock, or any combination thereof. For a
discussion of the tax treatment of a holder receiving cash, shares of common
stock or any combination thereof see "Certain United States Federal Income Tax
Considerations--Sale, Exchange, Conversion or Redemption."

    In addition to the purchase price payable with respect to all LYONs
purchased, we will pay any accrued and unpaid contingent interest with respect
to such LYONs, in cash.

    If prior to a purchase date the LYONs have been converted to semiannual
coupon notes following the occurrence of a Tax Event, the purchase price will be
equal to the restated principal amount plus accrued and unpaid interest from the
date of the conversion to the purchase date. See "--Optional Conversion to
Semiannual Coupon Note upon Tax Event."

    We will be required to give notice on a date not less than 20 business days
prior to each purchase date to all holders at their addresses shown in the
register of the registrar, and to beneficial owners as required by applicable
law, stating among other things:

    - whether we will pay the purchase price of LYONs in cash or common stock or
      any combination thereof, specifying the percentages of each;

    - if we elect to pay in common stock, the method of calculating the market
      price of the common stock; and

    - the procedures that holders must follow to require us to purchase their
      LYONs.

    The purchase notice given by each holder electing to require us to purchase
LYONs shall be given to the paying agent no later than the close of business on
the purchase date and must state:

    - the certificate numbers of the holder's LYONs to be delivered for
      purchase;

    - the portion of the principal amount at maturity of LYONs to be purchased,
      which must be $1,000 or an integral multiple of $1,000;

    - that the LYONs are to be purchased by us pursuant to the applicable
      provisions of the LYONs; and

    - in the event we elect, pursuant to the notice that we are required to
      give, to pay the purchase price in common stock, in whole or in part, but
      the purchase price is ultimately to be paid to the holder entirely in cash
      because any of the conditions to payment of the purchase price or

                                       23

      portion of the purchase price in common stock is not satisfied prior to
      the close of business on the purchase date, as described below, whether
      the holder elects:

    (1) to withdraw the purchase notice as to some or all of the LYONs to which
it relates, or

    (2) to receive cash in respect of the entire purchase price for all LYONs or
portions of LYONs subject to such purchase notice.

    If the holder fails to indicate the holder's choice with respect to the
election described in the final bullet point above, the holder shall be deemed
to have elected to receive cash in respect of the entire purchase price for all
LYONs subject to the purchase notice in these circumstances.

    Any purchase notice may be withdrawn by the holder by a written notice of
withdrawal delivered to the paying agent prior to the close of business on the
purchase date. The notice of withdrawal shall state:

    - the principal amount at maturity of the LYONs being withdrawn;

    - the certificate numbers of the LYONs being withdrawn; and

    - the principal amount at maturity, if any, of the LYONs that remain subject
      to the purchase notice.

    If we elect to pay the purchase price, in whole or in part, in shares of
common stock, the number of shares of common stock to be delivered by us shall
be equal to the portion of the purchase price to be paid in common stock divided
by the market price of a share of common stock. We will pay cash based on the
market price for all fractional shares of common stock in the event we elect to
deliver common stock in payment, in whole or in part, of the purchase price.

    The "market price" means the average of the sale prices (determined as
described in the following paragraph) of the common stock for the
five-trading-day period ending on the third business day prior to the applicable
purchase date. If the third business day prior to the applicable purchase date
is not a trading day, the five-trading-day period shall end on the last trading
day prior to such third business day. We will appropriately adjust the market
price to take into account the occurrence, during the period commencing on the
first of such trading days during such five-trading-day period and ending on
such purchase date, of certain events that would result in an adjustment of the
conversion rate with respect to the common stock.

    The "sale price" of the common stock on any date means the closing per share
sale price (or if no closing sale price is reported, the average of the bid and
ask prices or, if more than one in either case, the average of the average bid
and the average ask prices) on such date as reported in composite transactions
for the principal United States securities exchange on which the common stock is
traded (which is currently the NYSE) or, if the common stock is not listed on a
United States national or regional securities exchange, as reported by the
National Association of Securities Dealers Automated Quotation System or by the
National Quotation Bureau Incorporated. Because the market price of the common
stock is determined prior to the applicable purchase date, holders of LYONs bear
the market risk with respect to the value of the common stock to be received
from the date such market price is determined to such purchase date. We may pay
the purchase price or any portion of the purchase price in common stock only if
the information necessary to calculate the market price is published in a daily
newspaper of national circulation.

    Upon determination of the actual number of shares of common stock to be
issued for each $1,000 principal amount at maturity of LYONs in accordance with
the foregoing provisions, we will publish such information on our web site.

                                       24

    In addition to the above conditions, our right to purchase LYONs, in whole
or in part, with common stock is subject to our satisfying various conditions,
including:

    - listing such common stock on the principal United States securities
      exchange on which our common stock is then listed or, if not so listed, on
      NASDAQ;

    - the registration of the common stock under the Securities Act and the
      Exchange Act, if required; and

    - any necessary qualification or registration under applicable state
      securities law or the availability of an exemption from such qualification
      and registration.

    If such conditions are not satisfied with respect to a holder prior to the
close of business on the purchase date, we will pay the purchase price of the
LYONs to the holder entirely in cash. We may not change the form of components
or percentages of components of consideration to be paid for the LYONs once we
have given the notice that we are required to give to holders of LYONs, except
as described in the first sentence of this paragraph.

    In connection with any purchase offer, we will:

    - comply with the provisions of Rule 13e-4, Rule 14e-1 and any other tender
      offer rules under the Exchange Act which may then apply; and

    - file Schedule TO or any other required schedule under the Exchange Act.

    Our obligation to pay the purchase price for a LYON for which a purchase
notice has been delivered and not validly withdrawn is conditioned upon delivery
of the LYON, together with necessary endorsements, to the paying agent at any
time after delivery of the purchase notice. Payment of the purchase price, plus
accrued and unpaid semiannual and contingent interest, if any, for the LYON will
be made promptly following the later of the purchase date and the time of
delivery of the LYON.

    If the paying agent holds money or securities sufficient to pay the purchase
price of the LYON on the business day following the purchase date in accordance
with the terms of the indenture, then, immediately after the purchase date, the
LYON will cease to be outstanding and original issue discount and semiannual and
contingent interest, if any, on such LYON will cease to accrue, whether or not
the LYON is delivered to the paying agent. Thereafter, all other rights of the
holder shall terminate, other than the right to receive the purchase price upon
delivery of the LYON.

    Our ability to purchase LYONs with cash may be limited by the terms of our
then existing borrowing agreements, as well as the amount of funds available to
us to fund any such purchases.

    No LYONs may be purchased for cash at the option of holders if there has
occurred and is continuing an event of default with respect to the LYONs, other
than a default in the payment of the purchase price with respect to such LYONs.

CHANGE IN CONTROL PERMITS HOLDERS TO REQUIRE US TO PURCHASE THEIR LYONS

    In the event of any change in control, as defined below, occurring on or
prior to June 6, 2006, each holder will have the right, at the holder's option,
subject to the terms and conditions of the indenture, to require us to purchase
for cash all or any portion of the holder's LYONs in integral multiples of
$1,000 principal amount at maturity at a price for each $1,000 principal amount
at maturity of such LYONs equal to the issue price of such LYON plus the accrued
original issue discount to the date of purchase.

    We will be required to purchase the LYONs as of the date that is no later
than 35 business days after the occurrence of such change in control (a "change
in control purchase date").

                                       25

    If prior to a change in control purchase date the LYONs have been converted
to semiannual coupon notes following the occurrence of a Tax Event, we will be
required to purchase the notes at a cash price equal to the restated principal
amount plus accrued and unpaid interest from the date of the conversion to the
change in control purchase date.

    In addition to the change in control purchase price with respect to all
LYONs purchased, we will pay any accrued and unpaid contingent interest with
respect to such LYONs, in cash.

    Within 15 business days after the occurrence of a change in control, we are
obligated to mail to the trustee and to all holders of LYONs at their addresses
shown in the register of the registrar and to beneficial owners as required by
applicable law a notice regarding the change in control, which notice shall
state, among other things:

    - the events causing a change in control;

    - the date of such change in control;

    - the change in control purchase price;

    - the change in control purchase date;

    - the name and address of the paying agent and the conversion agent;

    - the conversion rate and any adjustments to the conversion rate;

    - that LYONs with respect to which a change in control purchase notice is
      given by the holder may be converted only if the change in control
      purchase notice has been withdrawn in accordance with the terms of the
      indenture; and

    - the procedures that holders must follow to exercise these rights.

    To exercise this right, the holder must deliver a written notice to the
paying agent prior to the close of business on the change in control purchase
date. The required purchase notice upon a change in control shall state:

    - the certificate numbers of the LYONs to be delivered by the holder;

    - the portion of the principal amount at maturity of LYONs to be purchased,
      which portion must be $1,000 or an integral multiple of $1,000; and

    - that we are to purchase such LYONs pursuant to the applicable provisions
      of the LYONs.

    A holder may withdraw any change in control purchase notice by delivering to
the paying agent a written notice of withdrawal prior to the close of business
on the change in control purchase date. The notice of withdrawal shall state:

    - the principal amount at maturity of the LYONs being withdrawn;

    - the certificate numbers of the LYONs being withdrawn; and

    - the principal amount at maturity, if any, of the LYONs that remain subject
      to a change in control purchase notice.

    Our obligation to pay the change in control purchase price for a LYON for
which a change in control purchase notice has been delivered and not validly
withdrawn is conditioned upon delivery of the LYON, together with necessary
endorsements, to the paying agent at any time after the delivery of such change
in control purchase notice.

    Payment of the change in control purchase price plus accrued and unpaid
semiannual and contingent interest, if any, for such LYON will be made promptly
following the later of the change in control purchase date or the time of
delivery of such LYON.

                                       26

    If the paying agent holds money sufficient to pay the change in control
purchase price of the LYON on the business day following the change in control
purchase date in accordance with the terms of the indenture, then, immediately
after the change in control purchase date, original issue discount and
semiannual and contingent interest, if any, on such LYON will cease to accrue,
whether or not the LYON is delivered to the paying agent, and all other rights
of the holder shall terminate, other than the right to receive the change in
control purchase price upon delivery of the LYON.

    Under the indenture, a "change in control" of Legg Mason is deemed to have
occurred at such time as:

    - any person, including its affiliates and associates, other than us, our
      subsidiaries or our or their employee benefit plans, files a Schedule 13D
      or Schedule TO (or any successor schedule, form or report under the
      Exchange Act) disclosing that such person has become the beneficial owner
      of 50% or more of the voting power of Legg Mason's common stock or other
      capital stock into which Legg Mason's common stock is reclassified or
      changed, with certain exceptions; or

    - there shall be consummated any share exchange, consolidation or merger of
      Legg Mason pursuant to which Legg Mason's common stock would be converted
      into cash, securities or other property, in each case other than a share
      exchange, consolidation or merger of Legg Mason in which the holders of
      Legg Mason's common stock immediately prior to the share exchange,
      consolidation or merger have, directly or indirectly, at least a majority
      of the total voting power in the aggregate of all classes of capital stock
      of the continuing or surviving corporation immediately after the share
      exchange, consolidation or merger.

    The indenture does not permit our board of directors to waive our obligation
to purchase LYONs at the option of holders in the event of a change in control.

    In connection with any purchase offer in the event of a change in control,
we will:

    - comply with the provisions of Rule 13e-4, Rule 14e-1 and any other tender
      offer rules under the Exchange Act which may then be applicable; and

    - file Schedule TO or any other required schedule under the Exchange Act.

    The change in control purchase feature of the LYONs may in certain
circumstances make more difficult or discourage a takeover of Legg Mason. The
change in control purchase feature, however, is not part of a plan by management
to adopt a series of anti-takeover provisions nor is it the result of our
knowledge of any specific effort:

    - to accumulate shares of our common stock; or

    - to obtain control of Legg Mason by means of a merger, tender offer,
      solicitation or otherwise.

    Instead, the change in control purchase feature is a standard term contained
in other LYONs offerings that have been marketed by Merrill Lynch. The terms of
the change in control purchase feature resulted from negotiations between
Merrill Lynch and us.

    We could, in the future, enter into certain transactions, including certain
recapitalizations, that would not constitute a change in control with respect to
the change in control purchase feature of the LYONs but that would increase the
amount of our (or our subsidiaries) outstanding indebtedness.

    No LYONs may be purchased by Legg Mason at the option of holders upon a
change in control if there has occurred and is continuing an event of default
with trespect to the LYONs, other than a default in the payment of the change in
control purchase price with respect to the LYONs.

                                       27

OPTIONAL CONVERSION TO SEMIANNUAL COUPON NOTE UPON TAX EVENT

    From and after the date of the occurrence of a Tax Event, we will have the
option to elect to have interest in lieu of future original issue discount
accrue at 2.75% per year on a principal amount per LYON (the "restated principal
amount") equal to the issue price plus original issue discount accrued to the
date of the Tax Event or the date on which we exercise the option described
herein, whichever is later (the "option exercise date").

    Such interest shall accrue from the option exercise date and will be payable
semiannually on the interest payment dates of June 6 and December 6 of each year
to holders of record at the close of business on the May 22 or November 21
immediately preceding the interest payment date. Interest will be computed on
the basis of a 360-day year consisting of twelve 30-day months. Interest will
accrue from the most recent date to which interest has been paid or if no
interest has been paid, from the option exercise date. In the event that we
exercise our option to pay interest in lieu of accrued original issue discount,
the redemption price, purchase price and change in control purchase price on the
LYONs will be adjusted and no future contingent interest will accrue or be paid
on the LYONs (although other periodic cash payments may be payable as a result
of a failure to timely file or make effective a shelf registration statement).
If the LYONs are converted to semiannual coupon notes following the occurrence
of a Tax Event, this will not result in any change in the holder's conversion
rights.

    A "Tax Event" means that we shall have received an opinion from independent
tax counsel experienced in such matters to the effect that, on or after the date
of this prospectus, as a result of:

    - any amendment to, or change (including any announced prospective change)
      in, the laws (or any regulations thereunder) of the United States or any
      political subdivision or taxing authority thereof or therein, or

    - any amendment to, or change in, an interpretation or application of such
      laws or regulations by any legislative body, court, governmental agency or
      regulatory authority,

    in each case which amendment or change is enacted, promulgated, issued or
announced or which interpretation is issued or announced or which action is
taken on or after the date of this prospectus, there is more than an
insubstantial risk that amounts that are treated as interest on the LYONs for
United States federal income tax purposes as described under "Certain United
States Federal Income Tax Considerations" (including tax original issue discount
and contingent interest, if any) either:

    (1) would not be deductible on a current accrual basis, or

    (2) would not be deductible under any other method, in either case in whole
       or in part, by Legg Mason (by reason of deferral, disallowance, or
       otherwise) for United States federal income tax purposes.

    If a proposal were ever enacted and made applicable to the LYONs in a manner
that would limit our ability to either:

    - deduct, on a current accrual basis, amounts that are treated as interest
      on the LYONs for United States federal income tax purposes as described
      under "Certain United States Federal Income Tax Considerations," including
      tax original issue discount and contingent interest, if any, or

    - deduct such amounts under any other method for United States federal
      income tax purposes, such enactment would result in a Tax Event and the
      terms of the LYONs would be subject to modification at our option as
      described above.

    The modification of the terms of LYONs by us upon a Tax Event as described
above would alter the timing of income recognition by holders of the LYONs with
respect to the semiannual payments of

                                       28

interest due on the LYONs after the option exercise date. See "Certain United
States Federal Income Tax Considerations."

MERGER AND SALES OF ASSETS BY LEGG MASON

    The indenture provides that we may not consolidate with or merge into any
other person or convey, transfer or lease our properties and assets
substantially as an entirety to another person, unless, among other items:

    - the resulting, surviving or transferee person (if other than Legg Mason)
      is organized and existing under the laws of the United States, any state
      thereof or the District of Columbia;

    - such person assumes all obligations of Legg Mason under the LYONs and the
      indenture; and

    - Legg Mason or such successor person is not immediately thereafter in
      default under the indenture.

    Upon the assumption of the obligations of Legg Mason by such a person in
such circumstances, subject to certain exceptions, Legg Mason will be discharged
from all obligations under the LYONs and the indenture. Although such
transactions are permitted under the indenture, certain of the foregoing
transactions occurring on or prior to June 6, 2006 could constitute a change in
control of Legg Mason permitting each holder to require Legg Mason or such
successor person to purchase the LYONs of such holder as described above.

EVENTS OF DEFAULT

    The following are events of default for the LYONs:

    - default in payment of the principal amount at maturity (or if the LYONs
      have been converted to semiannual coupon notes following a Tax Event, the
      restated principal amount), issue price, accrued original issue discount,
      redemption price, purchase price or change in control purchase price with
      respect to any LYON when such becomes due and payable;

    - default in payment of any contingent interest or of interest which becomes
      payable after the LYONs have been converted to semiannual coupon notes
      following the occurrence of a Tax Event, which default, in any such case,
      continues for 30 days;

    - failure by Legg Mason to comply with any of its other agreements in the
      LYONs or the indenture upon receipt by Legg Mason of notice of such
      default by the trustee or by holders of not less than 25% in aggregate
      principal amount at maturity of the LYONs then outstanding and Legg
      Mason's failure to cure (or obtain a waiver of) such default within
      60 days after receipt by Legg Mason of such notice;

    - (A) failure by Legg Mason to make any payment by the end of any applicable
      grace period after maturity of indebtedness, which term as used in the
      indenture means obligations (other than nonrecourse obligations) of Legg
      Mason for borrowed money or evidenced by bonds, debentures, notes or
      similar instruments ("Indebtedness"), in an amount in excess of
      $10,000,000 and continuance of such failure, or (B) the acceleration of
      Indebtedness in an amount in excess of $10,000,000 because of a default
      with respect to such Indebtedness without such Indebtedness having been
      discharged or such acceleration having been cured, waived, rescinded or
      annulled in case of (A) or (B) above, for a period of 30 days after
      receipt by Legg Mason of written notice of such default from the trustee
      or the holders of not less than 25% in aggregate principal amount at
      maturity of the LYONs then outstanding. However, if any such failure or
      acceleration referred to in (A) or (B) above shall cease or be cured,
      waived, rescinded or annulled, then the event of default by reason thereof
      shall be deemed not to have occurred; or

    - certain events of bankruptcy or insolvency affecting Legg Mason.

                                       29

    If an event of default shall have happened and be continuing, either the
trustee or the holders of not less than 25% in aggregate principal amount at
maturity of the LYONs then outstanding may declare the issue price of the LYONs
plus the original issue discount on the LYONs accrued through the date of such
declaration, and any accrued and unpaid interest (including semiannual interest
and contingent interest, if any) through the date of such declaration, to be
immediately due and payable. In the case of certain events of bankruptcy or
insolvency of Legg Mason, the issue price of the LYONs plus the accrued original
issue discount on the LYONs, and any accrued and unpaid interest (including
semiannual interest and contingent interest, if any), through the occurrence of
such event shall automatically become and be immediately due and payable.

MODIFICATION

    We and the trustee may modify or amend the indenture or the terms of the
LYONs with the consent of the holders of at least a majority in principal amount
at maturity of the LYONs then outstanding. However, without the consent of the
holders of each outstanding LYON affected thereby, we may not:

    - alter the manner of calculation or rate of accrual of, or otherwise
      adversely affect the rights of holders of LYONs to receive, original issue
      discount or interest (including semiannual or contingent interest) on any
      LYON or extend the time of payment of original issue discount or interest;

    - make any LYON payable in money or securities other than that stated in the
      LYON;

    - change the stated maturity of any LYON;

    - reduce the principal amount at maturity, issue price, restated principal
      amount, redemption price, purchase price or change in control purchase
      price with respect to any LYON;

    - make any change that adversely affects the right of a holder to convert
      any LYON;

    - make any change that adversely affects the right to require us to purchase
      a LYON;

    - the right to receive payment with respect to the LYONs or the right to
      institute suit for the enforcement of any payment with respect to, or
      conversion of, the LYONs; or

    - change the provisions in the indenture that relate to modifying or
      amending the indenture.

    Notwithstanding the foregoing, without the consent of any holder of LYONs,
we and the trustee may modify or amend the indenture or the terms of the LYONs
for any of the following purposes:

    - to evidence a successor to us and the assumption by that successor of our
      obligations under the indenture and the LYONs;

    - to add to our covenants for the benefit of the holders of the LYONs or to
      surrender any right or power conferred upon us;

    - to secure our obligations in respect of the LYONs and the indenture;

    - to make any changes or modifications to the indenture necessary in
      connection with the registration of the LYONs under the Securities Act and
      the qualification of the LYONs under the Trust Indenture Act as
      contemplated by the indenture;

    - to cure any ambiguity, omission, defect or inconsistency in the indenture;
      or

    - to make any change that does not adversely affect the rights of any
      holders of LYONs.

    We may not modify or amend the indenture or the terms of the LYONs pursuant
to the second, third, fourth or fifth bullets of the preceding paragraph without
the consent of the holders of a majority

                                       30

in principal amount at maturity of the LYONs, if such modification or amendment
materially and adversely affects the interests of the holders of the LYONs.

    The holders of a majority in principal amount at maturity of the outstanding
LYONs may, on behalf of the holders of all LYONs:

    - waive compliance by us with restrictive provisions of the indenture, as
      detailed in the indenture; and

    - waive any past default under the indenture and its consequences, except a
      default in the payment of the principal amount at maturity, issue price,
      accrued and unpaid interest, accrued and unpaid semiannual interest or
      contingent interest, accrued original issue discount, redemption price,
      purchase price or change in control purchase price or obligation to
      deliver shares of common stock upon conversion with respect to any LYON or
      in respect of any provision which under the indenture cannot be modified
      or amended without the consent of the holder of each outstanding LYON
      affected.

DISCHARGE OF THE INDENTURE

    Legg Mason may satisfy and discharge its obligations under the indenture by
delivering to the trustee for cancellation all outstanding LYONs or by
depositing with the trustee, the paying agent or the conversion agent, as
applicable, after the LYONs have become due and payable, whether at stated
maturity, or any redemption date, or any purchase date, or a change in control
purchase date, or upon conversion or otherwise, cash or shares of common stock
(as applicable under the terms of the indenture) sufficient to pay all of the
outstanding LYONs and paying all other sums payable under the indenture by Legg
Mason.

CALCULATIONS IN RESPECT OF LYONS

    We will be responsible for making all calculations called for under the
LYONs. These calculations include, but are not limited to, determination of the
market price of the LYONs and the sales price of our common stock and amounts of
contingent interest, if any, payable on the LYONs. We will make all these
calculations in good faith and, absent manifest error, our calculations will be
final and binding on holders of LYONs. We will provide a schedule of our
calculations to the trustee, and the trustee is entitled to rely upon the
accuracy of our calculations without independent verification.

LIMITATIONS OF CLAIMS IN BANKRUPTCY

    If a bankruptcy proceeding is commenced in respect of Legg Mason, the claim
of the holder of a LYON is, under Title 11 of the United States Code, limited to
the issue price of the LYON plus that portion of the original issue discount
that has accrued from the date of issue to the commencement of the proceeding,
plus contingent interest and semiannual interest, if any, accrued after a Tax
Event. In addition, the holders of the LYONs will be effectively subordinated to
the indebtedness and other obligations of Legg Mason's subsidiaries.

INFORMATION CONCERNING THE TRUSTEE

    The Bank of New York is the trustee, registrar, paying agent and conversion
agent under the indenture. The Bank of New York has agreed to be a lender under
our existing, undrawn revolving credit facility and also acts as the trustee for
our $100,000,000 Senior Notes due 2006. We may maintain deposit accounts and
conduct other banking and custodial transactions with The Bank of New York in
the normal course of business.

GOVERNING LAW

    The indenture and the LYONs are governed by, and construed in accordance
with, the law of the State of New York.

                                       31

                          DESCRIPTION OF CAPITAL STOCK


    Our authorized capital stock consists of 250,000,000 shares of common stock,
par value $.10 per share, and 4,000,000 shares of preferred stock, par value
$10.00 per share. As of September 30, 2001, we had 63,937,582 shares of common
stock and one share of preferred stock outstanding.


COMMON STOCK

    Holders of our common stock are entitled to:

    - one vote per share on matters to be voted upon by the stockholders;

    - receive dividends out of funds legally available for distribution when and
      if declared by our board of directors; and

    - share ratably in our assets legally available for distribution to our
      stockholders in the event of our liquidation, dissolution or winding up,
      after provisions for distributions to the holders of any preferred stock.

    We may not pay any dividend (other than in shares of our common stock) or
make any distributions of assets on shares of our common stock until cumulative
dividends on any preferred stock then outstanding have been paid.

    Holders of our common stock have no preemptive, subscription, redemption or
conversion rights. The outstanding shares of our common stock are, and the
shares which may be issued upon conversion of the LYONs will be, when issued,
fully paid and nonassessable.

    The holders of our common stock do not have cumulative voting rights. This
means that holders of more than half of the shares can elect all of the
directors and holders of the remaining shares will not be able to elect any
directors. Our By-laws provide for a classified board of directors consisting of
three classes with staggered three-year terms.

TRANSFER AGENT

    The transfer agent and registrar for our common stock is First Union
National Bank, Charlotte, North Carolina.

PREFERRED STOCK

    Our Articles of Incorporation authorize our board of directors to issue
shares of preferred stock, par value $10.00 per share, and to fix the terms
(including voting rights, dividends, redemption and conversion provisions, if
any, and rights upon liquidation) of any shares issued. Outstanding shares of
preferred stock that are redeemed or are converted to common stock are restored
to the status of authorized and unissued shares of preferred stock issuable in a
series by our board of directors.


    On May 26, 2000, we issued one special voting share of preferred stock in
connection with our acquisition of Perigee Inc. This special voting share
provides the holders of exchangeable shares of our subsidiary, Legg Mason Canada
Holdings Ltd., with substantially the same voting rights as the holders of our
common stock. This special voting share has a number of votes, which may be cast
at a Legg Mason stockholders' meeting, equal to the number of exchangeable
shares outstanding. As of September 30, 2001, there were 2,651,586 exchangeable
shares outstanding.


    Our board of directors has the authority, under our Articles of
Incorporation, to classify or reclassify any unissued preferred stock from time
to time by setting or changing the preferences, conversion or other rights,
voting powers, restrictions, limitations as to dividends, qualifications, or
terms or conditions of redemption of the stock.

                                       32

TWO-TIER BUSINESS COMBINATION PROVISIONS

    Maryland law requires the affirmative vote of at least a majority of all of
the outstanding shares entitled to vote to approve a merger, consolidation,
share exchange or disposition of all or substantially all of our assets. Our
Articles of Incorporation require the affirmative vote of not less than 70% of
our then outstanding voting shares to approve any "business combination" of us
with any "Related Person" unless certain conditions have been met. In addition,
the 70% vote must include the affirmative vote of at least 55% of the
outstanding shares of voting stock held by stockholders other than the Related
Person. Accordingly, the actual vote required to approve the business
combination may be greater than the 70%, depending upon the number of shares
controlled by the Related Person. A Related Person is defined to include any
person or entity which is, directly or indirectly, the beneficial owner of 15%
or more of the outstanding shares of our voting stock, including any affiliate
or associate of such person or entity. The term "business combination" is
defined to include a wide variety of transactions between us and a Related
Person, including a merger, consolidation, share exchange or sale of assets
having a fair market value grater than 10% of the book value of our consolidated
assets.

    However, if the Related Person pays a "fair price" to our stockholders in
the transaction, the 70% requirement would not be applicable and the proposed
business combination could be approved by a simple majority of the stockholders
unless otherwise required by Maryland law, provided that such affirmative vote
includes at least 55% of the voting stock held by persons other than the Related
Person. Under our Articles of Incorporation, the "fair price" must be at least
equal to the greater of

    - the highest price paid or agreed to be paid by the Related Person to
      purchase shares of our common stock during the 24-month period prior to
      the taking of such vote; or

    - the highest market price of the common stock during the 24-month period
      prior to the taking of such vote; or

    - the per share book value of our common stock at the end of the calendar
      quarter immediately preceding the taking of such vote.

    In addition, the "fair price" consideration to be received by our
stockholders must be of the same form and kind as the most favorable form and
kind of consideration paid by the Related Person in acquiring any of its shares
of our common stock.

    The special voting provisions are not applicable to a business combination
authorized by our board of directors by a vote which includes a majority of our
"Disinterested Directors". A Disinterested Director is defined to include any
member of our board of directors who is not the Related Person (or an affiliate
or associate of the Related Person) and who was a director prior to the time
that the Related Person became a Related Person, any successor of a
Disinterested Director who is not the Related Person (or any affiliate or
associate of the Related Person) and who is recommended to succeed a
Disinterested Director by a majority of the Disinterested Directors then on our
board of directors.

    Our special voting provisions may not be amended, altered, changed or
repealed except by the affirmative vote of at least 70% of the share of stock
entitled to vote at a meeting of the stockholders called for the consideration
of such amendment, alteration, change or repeal, and at least 55% of the
outstanding shares of stock entitled to vote thereon held by stockholders who
are not Related Persons, unless such proposal was proposed by our board of
directors by a vote which includes a majority of the Disinterested Directors.

    The business combination provisions under our Articles of Incorporation
could have the effect of delaying, deterring or preventing a change in control.
Any possible change in control could also be affected by the applicability of
certain Maryland anti-takeover statutes dealing with business combinations and
acquisitions of controlling blocks of shares, as well as by our classified board
of director provisions.

                                       33

            CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS

GENERAL

    This is a summary of certain United States federal income tax considerations
relevant to holders of LYONs. This summary is based upon laws, regulations,
rulings and decisions now in effect, all of which are subject to change
(including retroactive changes) or possible differing interpretations. The
discussion below deals only with LYONs held as capital assets and does not
purport to deal with persons in special tax situations, such as financial
institutions, insurance companies, regulated investment companies, dealers in
securities, traders in securities electing to mark to market, tax-exempt
entities, persons holding LYONs in a tax-deferred or tax-advantaged account, or
persons holding LYONs, as a position in a "straddle" or as part of a "hedging"
or "conversion" transaction for tax purposes.

    We do not address all of the tax consequences that may be relevant to an
investor in LYONs. In particular, we do not address:

    - the United States federal estate, gift or alternative minimum tax
      consequences of the purchase, ownership or disposition of LYONs;

    - any state, local or foreign tax consequences of the purchase, ownership or
      disposition of LYONs; or

    - United States federal, state, local or foreign tax consequences of owning
      or disposing of our common stock.

    Persons considering the purchase of the LYONs should consult their own tax
advisors concerning the application of the United States federal income tax laws
to their particular situations as well as any consequences of the purchase,
ownership and disposition of the LYONs arising under the laws of any other
taxing jurisdiction.

    A U.S. Holder is a beneficial owner of the LYONs who or which is:

    - a citizen or individual resident of the United States, as defined in
      Section 7701(b) of the Internal Revenue Code of 1986, as amended (which we
      refer to as the Code);

    - a corporation, including any entity treated as a corporation for United
      States federal income tax purposes, created or organized in or under the
      laws of the United States, any state thereof or the District of Columbia;

    - an estate if its income is subject to United States federal income
      taxation regardless of its source; or

    - a trust if (1) a United States court can exercise primary supervision over
                 its administration and

                 (2) one or more United States persons have the authority to
                     control all of its substantial decisions.

Notwithstanding the preceding sentence, certain trusts in existence on
August 20, 1996, and treated as U.S. persons prior to such date, may also be
treated as U.S. Holders. A Non-U.S. Holder is a beneficial owner of LYONs other
than a U.S. Holder.

    No statutory, administrative or judicial authority directly addresses the
treatment of the LYONs or instruments similar to the LYONs for United States
federal income tax purposes. No rulings have been sought or are expected to be
sought from the Internal Revenue Service (which we refer to as the IRS) with
respect to any of the United States federal income tax consequences discussed
below, and the IRS would not be precluded from taking contrary positions. As a
result, no assurance can be given that the IRS will agree with the tax
characterizations and the tax consequences described below.

                                       34

    WE URGE PROSPECTIVE INVESTORS TO CONSULT THEIR OWN TAX ADVISORS WITH RESPECT
TO THE TAX CONSEQUENCES TO THEM OF THE PURCHASE, OWNERSHIP AND DISPOSITION OF
THE LYONS AND OUR COMMON STOCK IN LIGHT OF THEIR OWN PARTICULAR CIRCUMSTANCES,
INCLUDING THE TAX CONSEQUENCES UNDER STATE, LOCAL, FOREIGN AND OTHER TAX LAWS
AND THE POSSIBLE EFFECTS OF CHANGES IN UNITED STATES FEDERAL OR OTHER TAX LAWS.

CLASSIFICATION OF THE LYONS

    It is the opinion of Shearman & Sterling, our United States federal income
tax counsel, that the LYONs are treated as indebtedness for United States
federal income tax purposes and that the LYONs are subject to the special
regulations governing contingent payment debt instruments (which we refer to as
the CPDI regulations). Pursuant to the terms of the indenture, we and each
holder of the LYONs agree, for United States federal income tax purposes, to
treat the LYONs as debt instruments that are subject to the CPDI regulations.
The remainder of this discussion assumes such treatment for United States
federal income tax purposes.

ACCRUAL OF INTEREST ON THE LYONS

    Pursuant to the CPDI regulations, a U.S. Holder of the LYONs is required to
accrue interest income on the LYONs, in the amounts described below, regardless
of whether the U.S. Holder uses the cash or accrual method of tax accounting.
Accordingly, U.S. Holders are required to include interest in taxable income in
each year in excess of the accruals on the LYONs for non-tax purposes and in
excess of any contingent interest payments actually received in that year.

    The CPDI regulations provide that a U.S. Holder must accrue an amount of
ordinary interest income, as original issue discount for United States federal
income tax purposes, for each accrual period prior to and including the maturity
date of the LYONs that equals: (1) the product of (i) the adjusted issue price
(as defined below) of the LYONs as of the beginning of the accrual period; and
(ii) the comparable yield to maturity (as defined below) of the LYONs, adjusted
for the length of the accrual period; (2) divided by the number of days in the
accrual period; and (3) multiplied by the number of days during the accrual
period that the U.S. Holder held the LYONs.

    A LYONs issue price is the first price at which a substantial amount of
LYONs are sold to investors, excluding sales to bond houses, brokers or similar
persons or organizations acting in the capacity of underwriters, placement
agents or wholesalers. The adjusted issue price of a LYON is its issue price
increased by any interest income previously accrued, determined without regard
to any adjustments to interest accruals described below, and decreased by the
amount of payments that were scheduled to have been made in accordance with our
schedule of projected payments, described below (whether or not such payments
were actually made in the scheduled amounts).

    Shearman & Sterling, our United States federal income tax counsel, has
advised us that the term "comparable yield" means the annual yield we would pay,
as of the initial issue date, on a fixed rate, nonconvertible debt security with
no contingent payments, but with terms and conditions otherwise comparable to
those of the LYONs. Based in part on that advice, we intend to take the position
that the comparable yield for the LYONs is 7.16% compounded semiannually.

    The CPDI regulations require that we provide to U.S. Holders, solely for
United States federal income tax purposes, a schedule of the projected amounts
of payments, which we refer to as projected payments, on the LYONs. This
schedule must produce the comparable yield. The projected payment schedule
includes estimates for certain contingent interest payments and an estimate for
a payment at maturity taking into account the conversion feature.

    The comparable yield and the schedule of projected payments will be set
forth in the indenture. U.S. Holders may also obtain the projected payment
schedule by submitting a written request for such

                                       35

information to: Legg Mason, Inc., 100 Light Street, Baltimore, MD 21202
Attention: Corporate Secretary.

    Under the indenture, a U.S. Holder must, for United States federal income
tax purposes, use the comparable yield and the schedule of projected payments in
determining its interest accruals, and the adjustments thereto described below,
in respect of the LYONs. It is possible that the IRS could challenge the
comparable yield and projected payment schedule. If the comparable yield or
projected payment schedule were redetermined as a result of such a challenge,
the timing and amount of taxable income of a holder arising from the ownership,
sale, exchange, conversion or redemption of a LYON could be altered.

    THE COMPARABLE YIELD AND THE SCHEDULE OF PROJECTED PAYMENTS ARE NOT
DETERMINED FOR ANY PURPOSE OTHER THAN FOR THE DETERMINATION OF A U.S. HOLDER'S
INTEREST ACCRUALS AND ADJUSTMENTS THEREOF IN RESPECT OF THE LYONS FOR UNITED
STATES FEDERAL INCOME TAX PURPOSES AND DO NOT CONSTITUTE A PROJECTION OR
REPRESENTATION REGARDING THE ACTUAL AMOUNTS PAYABLE ON THE LYONS.

    Amounts treated as interest under the CPDI regulations are treated as
original issue discount for all purposes of the Code.

ADJUSTMENTS TO INTEREST ACCRUALS ON THE LYONS

    If, during any taxable year, a U.S. Holder receives actual payments with
respect to the LYONs for that taxable year that in the aggregate exceed the
total amount of projected payments for that taxable year, the U.S. Holder will
incur a "net positive adjustment" under the CPDI regulations equal to the amount
of such excess. The U.S. Holder will treat a "net positive adjustment" as
additional interest income. For this purpose, the payments in a taxable year
include the fair market value of property (including our common stock) received
in that year.

    If a U.S. Holder receives in a taxable year actual payments with respect to
the LYONs for that taxable year that in the aggregate were less than the amount
of projected payments for that taxable year, the U.S. Holder will incur a "net
negative adjustment" under the CPDI regulations equal to the amount of such
deficit. This adjustment will (a) reduce the U.S. Holder's interest income on
the LYONs for that taxable year, and (b) to the extent of any excess after the
application of (a), give rise to an ordinary loss to the extent of the U.S.
Holder's interest income on the LYONs during prior taxable years, reduced to the
extent such interest was offset by prior net negative adjustments.

    If a U.S. Holder purchases a LYON at a discount or premium to the adjusted
issue price, the discount will be treated as a positive adjustment and the
premium will be treated as a negative adjustment. The U.S. Holder must
reasonably allocate the adjustment over the remaining term of the LYON by
reference to the accruals of original issue discount at the comparable yield or
to the projected payments. It may be reasonable to allocate the adjustment over
the remaining term of the LYON pro rata with the accruals of original issue
discount at the comparable yield. U.S. Holders should consult their own tax
advisors regarding these allocations.

SALE, EXCHANGE, CONVERSION OR REDEMPTION

    Generally, the sale or exchange of a LYON, or the redemption of a LYON for
cash, will result in taxable gain or loss to a U.S. Holder. As described above,
our calculation of the comparable yield and the schedule of projected payments
for the LYONs includes the receipt of stock upon conversion as a contingent
payment with respect to the LYONs. Accordingly, we intend to treat the receipt
of our common stock by a U.S. Holder upon the conversion of a LYON, or upon the
redemption of a LYON where we elect to pay in common stock, as a payment under
the CPDI regulations. Under this treatment, conversion or such a redemption also
would result in taxable gain or loss to the U.S.

                                       36

Holder. As described above, holders are generally bound by our determination of
the comparable yield and the schedule of projected payments.

    The amount of gain or loss on a taxable sale, exchange, conversion or
redemption would be equal to the difference between (a) the amount of cash plus
the fair market value of any other property received by the U.S. Holder,
including the fair market value of any of our common stock received, and
(b) the U.S. Holder's adjusted tax basis in the LYON. A U.S. Holder's adjusted
tax basis in a LYON will generally be equal to the U.S. Holder's original
purchase price for the LYON, increased by any interest income previously accrued
by the U.S. Holder (determined without regard to any adjustments to interest
accruals described above), and decreased by the amount of any projected payments
that have been previously scheduled to be made in respect of the LYONs (without
regard to the actual amount paid). Gain recognized upon a sale, exchange,
conversion or redemption of a LYON will generally be treated as ordinary
interest income; any loss will be ordinary loss to the extent of interest
previously included in income, and thereafter, capital loss (which will be
long-term if the LYON is held for more than one year). The deductibility of net
capital losses by individuals and corporations is subject to limitations.

    A U.S. Holder's tax basis in our common stock received upon a conversion of
a LYON or upon a Holder's exercise of a put right that we elect to pay in common
stock will equal the then current fair market value of such common stock. The
U.S. Holder's holding period for the common stock received will commence on the
day immediately following the date of conversion or redemption.

TREATMENT OF NON-U.S. HOLDERS

    Absent further guidance from the IRS, we intend to treat payments of
contingent interest made to Non-U.S. Holders as subject to United States federal
withholding tax. Therefore, we intend to withhold on such payments at a rate of
30%, subject to reduction by an applicable treaty or upon the receipt of a
Form W-8ECI from a Non-U.S. Holder claiming that the payments are effectively
connected with the conduct of a United States trade or business. A Non-U.S.
Holder that is subject to the withholding tax should consult its own tax
advisors as to whether it can obtain a refund for a portion of the withholding
tax, either on the grounds that some portion of the contingent interest
represents a return of principal under the CPDI regulations, or on some other
grounds.

    All other payments on the LYONs made to a Non-U.S. Holder, including a
payment in common stock pursuant to a conversion, and any gain realized on a
sale or exchange of the LYONs (other than gain attributable to accrued
contingent interest payments), will be exempt from United States federal income
and withholding tax, PROVIDED that: (i) such Non-U.S. Holder does not own,
actually or constructively, 10 percent or more of the total combined voting
power of all classes of our stock entitled to vote, and is not a controlled
foreign corporation related, directly or indirectly, to us through stock
ownership, (ii) the statement requirement set forth in section 871(b) or
section 881(c) of the Code has been fulfilled with respect to the beneficial
owner, as discussed below; (iii) such payments and gain are not effectively
connected with the conduct by such Non-U.S. Holder of a trade or business in the
United States and (iv) our common stock continues to be actively traded within
the meaning of section 871(h)(4)(C)(v)(I) of the Code (which, for these purposes
and subject to certain exceptions, includes trading on the NYSE).

    The statement requirement referred to in the preceding paragraph will be
fulfilled if the beneficial owner of a LYONs certifies on IRS Form W-8BEN, under
penalties of perjury, that it is not a United States person and provides its
name and address or otherwise satisfies applicable documentation requirements.

    If a Non-U.S. Holder of the LYONs is engaged in a trade or business in the
United States, and if interest on the LYONs is effectively connected with the
conduct of such trade or business, the Non-U.S. Holder, although exempt from the
withholding tax discussed in the preceding paragraphs, will generally

                                       37

be subject to regular United States federal income tax on interest and on any
gain realized on the sale or exchange of the LYONs in the same manner as if it
were a U.S. Holder. In lieu of the certificate described in the preceding
paragraph, such a Non-U.S. Holder would be required to provide to the
withholding agent a properly executed IRS Form W-8ECI (or successor form) in
order to claim an exemption from withholding tax. In addition, if such a
Non-U.S. Holder is a foreign corporation, such Holder may be subject to a branch
profits tax equal to 30% (or such lower rate provided by an applicable treaty)
of its effectively connected earnings and profits for the taxable year, subject
to certain adjustments.

CONSTRUCTIVE DIVIDENDS

    If at any time we were to make a distribution of property to our
stockholders that would be taxable to the stockholders as a dividend for United
States federal income tax purposes and, in accordance with the anti-dilution
provisions of the LYONs, the conversion rate of the LYONs were increased, such
increase might be deemed to be the payment of a taxable dividend to holders of
the LYONs.

    For example, an increase in the conversion rate in the event of
distributions of our evidences of indebtedness or our assets or an increase in
the event of an extraordinary cash dividend is likely to result in deemed
dividend treatment to holders of the LYONs, but generally an increase in the
event of stock dividends or the distribution of rights to subscribe for common
stock should not be so treated.

BACKUP WITHHOLDING TAX AND INFORMATION REPORTING

    Payments of principal, premium, if any, and interest (including original
issue discount) on, and the proceeds of dispositions of, the LYONs may be
subject to information reporting and United States federal backup withholding
tax if the U.S. Holder thereof fails to supply an accurate taxpayer
identification number or otherwise fails to comply with applicable United States
information reporting or certification requirements. Any amounts so withheld do
not constitute a separate tax and will be allowed as a credit against such U.S.
Holder's United States federal income tax liability. Under recently enacted
legislation, the backup withholding tax rate for the remainder of the year 2001
is 30.5% and will be reduced to 30% for years 2002 and 2003, 29% for years 2004
and 2005, and 28% for 2006 and thereafter.

TAX EVENT

    The modification of the terms of the LYONs by us upon a Tax Event as
described in "Description of LYONs--Optional Conversion to Semiannual Coupon
Note upon Tax Event," would alter the timing of income recognition by the
holders with respect to the semiannual payments of interest due after the option
exercise date.

                                       38

                            SELLING SECURITY HOLDERS

    We originally issued the LYONs in a private placement in June 2001. The
LYONs were resold by the initial purchaser of the LYONs to qualified
institutional buyers under Rule 144A under the Securities Act. Selling security
holders may offer and sell the LYONs and the underlying common stock pursuant to
this prospectus.


    The following table sets forth information we have received as of
October 18, 2001, about the principal amount at maturity of LYONs and the
underlying common stock beneficially owned by each selling security holder that
may be offered using this prospectus.





                                                PRINCIPAL
                                                AMOUNT AT
                                               MATURITY OF                   NUMBER OF
                                                  LYONS       PERCENTAGE     SHARES OF
                                               BENEFICIALLY       OF        COMMON STOCK    PERCENTAGE OF
                                                OWNED THAT       LYONS      THAT MAY BE     COMMON STOCK
NAME AND ADDRESS:                              MAY BE SOLD    OUTSTANDING   SOLD (1)(4)    OUTSTANDING (2)
-----------------                              ------------   -----------   ------------   ---------------
                                                                               
AIG SoundShore Opportunity Holding Fund        $  3,264,000          *          25,153              *
  Ltd........................................
  c/o DKR Management Company, Inc.
  1281 East Main Street
  3rd Floor
  Stamford, CT 06902

AIG SoundShore Strategic Holding Fund Ltd....  $  1,836,000          *          14,149              *
  c/o DKR Management Company, Inc.
  1281 East Main Street
  3rd Floor
  Stamford, CT 06902

Allstate Insurance Company...................  $  2,200,000          *          16,954              *
  3075 Sanders Road
  Suite G6B
  Northbrook, IL 60062

Allstate Life Insurance Company..............  $  5,050,000          *          38,916              *
  3075 Sanders Road
  Suite G6B
  Northbrook, IL 60062

Argent Classic Convertible Arbitrage Fund      $  6,800,000       1.20%         52,402              *
(Bermuda) Ltd................................
  73 Front Street
  Hamilton HM 12
  Bermuda

Argent Classic Convertible Arbitrage Fund      $  5,000,000          *          38,531              *
L.P..........................................
  500 West Putnam Avenue
  3rd Floor
  Greenwich, CT 06830-6086

Argent Convertible Arbitrage Fund Ltd........  $  5,000,000          *          38,531              *
  73 Front Street
  Hamilton HM 12
  Bermuda



                                       39





                                                PRINCIPAL
                                                AMOUNT AT
                                               MATURITY OF                   NUMBER OF
                                                  LYONS       PERCENTAGE     SHARES OF
                                               BENEFICIALLY       OF        COMMON STOCK    PERCENTAGE OF
                                                OWNED THAT       LYONS      THAT MAY BE     COMMON STOCK
NAME AND ADDRESS:                              MAY BE SOLD    OUTSTANDING   SOLD (1)(4)    OUTSTANDING (2)
-----------------                              ------------   -----------   ------------   ---------------
                                                                               
Deephaven Domestic Convertible Trading         $  9,750,000       1.72%         75,135              *
  Ltd........................................
  130 Cheshire Lane
  Suite 102
  Minnetonka, MN 55305

Global Bermuda Limited Partnership...........  $  5,500,000          *          42,384              *
  601 Carlson Parkway
  Suite 200
  Minnetonka, MN 55305

KBC Financial Products.......................  $  2,500,000          *          19,266              *
  140 East 45th Street
  2 Grand Central Tower
  42nd Floor
  New York, NY 10017

Knight Securities LP.........................  $    750,000          *           5,780              *
  130 Cheshire Lane
  Suite 102
  Minnetonka, MN 55305

Lakeshore International Ltd..................  $ 27,550,000       4.86%        212,306              *
  601 Carlson Parkway
  Suite 200
  Minnetonka, MN 55305

Lydian Overseas Partners Master Fund.........  $ 19,300,000       3.40%        148,730              *
  c/o Lydian Asset Management L.P.
  101 East 52nd Street, 36th Floor
  New York, NY 10022

Morgan Stanley & Co..........................  $  5,000,000          *          38,531              *
  1585 Broadway
  New York, NY 10036

RAM Trading Ltd..............................  $ 10,000,000       1.76%         77,062              *
  c/o SAM Investments
  650 Warrenville Road
  Suite 408
  Lisle, IL 60532

RCG Latitude Master Fund.....................  $  3,500,000          *          26,972              *
  666 Third Ave., 26th Floor
  New York, NY 10019

Salomon Smith Barney Inc.....................  $  8,350,000       1.47%         64,347              *
  390 Greenwich St.
  Convertibles, 3rd Floor
  New York, NY 10013



                                       40





                                                PRINCIPAL
                                                AMOUNT AT
                                               MATURITY OF                   NUMBER OF
                                                  LYONS       PERCENTAGE     SHARES OF
                                               BENEFICIALLY       OF        COMMON STOCK    PERCENTAGE OF
                                                OWNED THAT       LYONS      THAT MAY BE     COMMON STOCK
NAME AND ADDRESS:                              MAY BE SOLD    OUTSTANDING   SOLD (1)(4)    OUTSTANDING (2)
-----------------                              ------------   -----------   ------------   ---------------
                                                                               
SAM Investments LDC..........................  $ 75,000,000      13.22%        577,965              *
  650 Warrenville Road
  Suite 408
  Lisle, IL 60532

Tribeca Investments, L.L.C...................  $ 83,900,000      14.79%        646,550           1.00%
  399 Park Ave.
  New York, NY 10043

UBS AG London Branch.........................  $ 58,765,000      10.36%        452,855              *
  100 Liverpool Street
  London EC2M 2RH
  United Kingdom

Worldwide Transactions Ltd...................  $    735,000          *           5,664              *
  48 Par La Ville Rd.
  Suite 778
  Hamilton, HMII Bermuda

Any other holder of LYONs or future
  transferee, pledgee, donee or successor of
  any holder (3).............................  $227,535,000      40.11%      1,753,429           2.67%



------------------------

* Less than 1%.

(1) Assumes conversion of all of the holder's LYONs at a conversion rate of
    7.7062 shares of common stock per $1,000 principal amount at maturity of the
    LYONs. However, this conversion rate will be subject to adjustment as
    described under "Description of LYONs--Conversion Rights." As a result, the
    amount of common stock issuable upon conversion of the LYONs may increase or
    decrease in the future.


(2) Calculated based on 63,937,582 shares of common stock outstanding as of
    September 30, 2001. In calculating this amount, we treated as outstanding
    that number of shares of common stock issuable upon conversion of all of a
    particular holder's LYONs. However, we did not assume the conversion of any
    other holder's LYONs.


(3) Information about other selling security holders will be set forth in
    prospectus supplements, if required.

(4) Assumes that the holders of LYONs, or any future transferees, pledgees,
    donees or successors of or from any such holder of LYONs, do not
    beneficially own any common stock other than the common stock issuable upon
    conversion of the LYONs at the initial conversion rate.


    We prepared this table based on the information supplied to us as of
October 18, 2001, by the selling security holders named in the table. The
selling security holders listed in the above table may have sold or transferred,
in transactions exempt from the registration requirements of the Securities Act,
some or all of their LYONs since the date on which the information is presented
in the above table. Information about the selling security holders may change
over time. Any changed information supplied to us will be set forth in future
prospectus supplements.


    Because the selling security holders may offer all or some of their LYONs or
the underlying common stock from time to time, we cannot estimate the amount of
the LYONs or the underlying

                                       41

common stock that will be held by the selling security holders upon the
termination of any particular offering. See "Plan of Distribution."

                              PLAN OF DISTRIBUTION

    We will not receive any of the proceeds of the sale of the LYONs and the
underlying common stock offered by this prospectus. The LYONs and the underlying
common stock may be sold from time to time to purchasers:

    - directly by the selling security holders; or

    - through underwriters, broker-dealers or agents who may receive
      compensation in the form of discounts, concessions or commissions from the
      selling security holders or the purchasers of the LYONs and the underlying
      common stock.

    The selling security holders and any such broker-dealers or agents who
participate in the distribution of the LYONs and the underlying common stock may
be deemed to be "underwriters." As a result, any profits on the sale of the
underlying common stock by selling security holders and any discounts,
commissions or concessions received by any such broker-dealers or agents may be
deemed to be underwriting discounts and commissions under the Securities Act. If
the selling security holders were deemed to be underwriters, the selling
security holders may be subject to statutory liabilities including, but not
limited to, those of Sections 11, 12 and 17 of the Securities Act and
Rule 10b-5 under the Exchange Act.

    If the LYONs and the underlying common stock are sold through underwriters
or broker-dealers, the selling security holders will be responsible for
underwriting discounts or commissions or agent's commissions.

    The LYONs and the underlying common stock may be sold in one or more
transactions at:

    - fixed prices;

    - prevailing market prices at the time of sale;

    - varying prices determined at the time of sale; or

    - negotiated prices.

    These sales may be effected in transactions:

    - on any national securities exchange or quotation service on which the
      LYONs and underlying common stock may be listed or quoted at the time of
      the sale, including the New York Stock Exchange in the case of the common
      stock;

    - in the over-the-counter market;

    - in transactions otherwise than on such exchanges or services or in the
      over-the-counter market; or

    - through the writing of options.

    These transactions may include block transactions or crosses. Crosses are
transactions in which the same broker acts as an agent on both sides of the
transaction.

    In connection with the sales of the LYONs and the underlying common stock or
otherwise, the selling security holders may enter into hedging transactions with
broker-dealers. These broker-dealers may in turn engage in short sales of the
LYONs and the underlying common stock in the course of hedging their positions.
The selling security holders may also sell the LYONs and the underlying common
stock short and deliver LYONs and the underlying common stock to close out short
positions,

                                       42

or loan or pledge LYONs and the underlying common stock to broker-dealers that,
in turn, may sell the LYONs and the underlying common stock.

    To our knowledge, there are currently no plans, arrangements or
understandings between any selling security holders and any underwriter,
broker-dealer or agent regarding the sale of the LYONs and the underlying common
stock by the selling security holders. Selling security holders may decide not
to sell all or a portion of the LYONs and the underlying common stock offered by
them pursuant to this prospectus or may decide not to sell LYONs or the
underlying common stock under this prospectus. In addition, any selling security
holder may transfer, devise or give the LYONs and the underlying common stock by
other means not described in this prospectus. Any LYONs or underlying common
stock covered by this prospectus that qualify for sale pursuant to Rule 144 or
Rule 144A of the Securities Act may be sold under Rule 144 or Rule 144A rather
than pursuant to this prospectus.

    Our common stock trades on the New York Stock Exchange under the symbol
"LM." We do not intend to apply for listing of the LYONs on any securities
exchange or for quotation through NASDAQ. Accordingly, no assurance can be given
as to the development of liquidity or any trading market for the LYONs.

    The selling security holders and any other persons participating in the
distribution of the LYONs or underlying common stock will be subject to the
Exchange Act. The Exchange Act rules include, without limitation, Regulation M,
which may limit the timing of purchases and sales of any of the LYONs and the
underlying common stock by the selling security holders and any such other
person. In addition, Regulation M of the Exchange Act may restrict the ability
of any person engaged in the distribution of the LYONs and the underlying common
stock being distributed for a period of up to five business days prior to the
commencement of such distribution. This may affect the marketability of the
LYONs and the underlying common stock and the ability to engage in market-making
activities with respect to the LYONs and the underlying common stock.

    Under the registration rights agreement that has been filed as an exhibit to
this registration statement, we and the selling security holders will each
indemnify the other against certain liabilities, including certain liabilities
under the Securities Act, or will be entitled to contribution in connection with
these liabilities.

    We have agreed to pay substantially all of the expenses incidental to the
registration, offering and sale of the LYONs and the underlying common stock to
the public other than commissions, fees and discounts of underwriters, brokers,
dealers and agents.

                                       43

                                 LEGAL MATTERS

    The validity of the LYONs and the shares of common stock issuable upon
conversion of the LYONs has been passed upon for us by Shearman & Sterling, New
York, New York counsel to Legg Mason, who will rely on the opinion of Robert F.
Price, Esq., our General Counsel, as to all matters of Maryland law. Mr. Price
beneficially owns, or has the right to acquire under our employee benefit plan,
less than one percent of our common stock.

                                    EXPERTS

    The consolidated financial statements and financial statement schedules
incorporated in this prospectus by reference to the Annual Report on Form 10-K
of Legg Mason for the year ended March 31, 2001 and the audited historical
financial statements of Private Capital Management, Inc. for the six months
ended June 29, 2000 and of Private Capital Management, L.P. for the six months
ended December 31, 2000 incorporated in this prospectus by reference to Legg
Mason's Current Report on Form 8-K dated August 1, 2001 have been so
incorporated in reliance on the reports of PricewaterhouseCoopers LLP,
independent accountants, given on the authority of said firms as experts in
accounting and auditing.

    The statement of financial condition of Carnes Capital Corporation as of
December 31, 2000, and the related statements of income, stockholder's equity,
and cash flows for the year then ended, have been incorporated by reference
herein and in the registration statement in reliance upon the report of KPMG
LLP, independent auditors, incorporated by reference herein, and upon the
authority of said firm as experts in accounting and auditing.

                                       44

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                                  $567,285,000

                                LEGG MASON, INC.

                     LIQUID YIELD OPTION-TM- NOTES DUE 2031
                             (ZERO COUPON--SENIOR)

                                      AND

                           COMMON STOCK ISSUABLE UPON
                            CONVERSION OF THE LYONS

                             ---------------------

                                   PROSPECTUS

                             ---------------------

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

    The following table sets forth the costs and expenses, payable by us in
connection with the distribution of the securities being registered. All of the
amounts shown are estimates, except the Securities and Exchange Commission
registration fee.


                                                           
Securities and Exchange Commission registration fee.........  $                   64,175
Printing and engraving fees.................................  $                    6,000
Accountant's fees and expenses..............................  $                   10,000
Legal fees and expenses.....................................  $                   65,000
Miscellaneous expenses......................................  $                    2,000
      Total.................................................  $                  147,175


ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS

    The Registrant's By-laws provide for indemnification of any person who is
serving or has served as a director or officer of the Registrant, against all
liabilities and expenses incurred in connection with any action, suit or
proceeding arising out of such service to the full extent permitted under
Maryland law.

    Section 2-418 of the Maryland General Corporation Law establishes provisions
whereby a Maryland corporation may indemnify any director or officer made a
party to an action or proceeding by reason of service in that capacity, against
judgments, penalties, fines, settlements and reasonable expenses incurred in
connection with such action or proceeding unless it is proved that the director
or officer (i) acted in bad faith or with active and deliberate dishonesty,
(ii) actually received an improper personal benefit in money, property or
services or (iii) in the case of a criminal proceeding, had reasonable cause to
believe that his act was unlawful. However, if the proceeding is a derivative
suit in favor of the corporation, indemnification may not be made if the
individual is adjudged to be liable to the corporation. In no case may
indemnification be made until a determination has been reached that the director
or officer has met the applicable standard of conduct. Indemnification for
reasonable expenses is mandatory if the director or officer has been successful
on the merits or otherwise in the defense of any action or proceeding covered by
the indemnification statute. The statute also provides for indemnification of
directors and officers by court order. The indemnification provided or
authorized in the indemnification statute does not preclude a corporation from
extending other rights (indemnification or otherwise) to directors and officers.

    The Registrant's officers and directors are insured against certain
liabilities under certain policies maintained by the Registrant with aggregate
coverage of $35,000,000.

    The foregoing summaries are subject to the complete text of the statute,
by-laws and agreements referred to above and are qualified in their entirety by
reference thereto.

                                      II-1

ITEM 16. EXHIBITS



                     
         4.1            Indenture dated as of June 6, 2001 between Legg Mason and
                        The Bank of New York.*

         4.2            Registration Rights Agreement dated as of June 6, 2001
                        between Legg Mason and Merrill Lynch & Co.*

         4.3            Articles of Incorporation of Legg Mason, Inc. (incorporated
                        by reference to Legg Mason's Quarterly Report on Form 10-Q
                        for the quarter ended September 30, 2000).

         4.4            Bylaws of Legg Mason Inc., as amended and restated April 25,
                        1998 (incorporated by reference to Legg Mason's Annual
                        Report on Form 10-K for the year ended March 31, 1998).

         5.1            Opinion of Robert F. Price.*

         5.2            Opinion of Shearman & Sterling.*

         8.1            Opinion of Shearman & Sterling as to Certain United States
                        Federal Income Tax Matters.*

        23.1            Consent of PricewaterhouseCoopers LLP, independent
                        accountants.

        23.2            Consent of KPMG LLP, independent accountants.

        23.3            Consent of Robert F. Price (included in Exhibit 5.1).*

        23.4            Consent of Shearman & Sterling (included in Exhibit 5.2 and
                        Exhibit 8.1).*

        24              Powers of Attorney.*

        25              Statement of Eligibility of Trustee on Form T-1.*



------------------------


*   Previously filed.


ITEM 17. UNDERTAKINGS

    The undersigned registrant hereby undertakes:

    (1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement: (i) to include any
prospectus required by section 10(a)(3) of the Securities Act of 1933; (ii) to
reflect in the prospectus any facts or events arising after the effective date
of the registration statement (or the most recent post-effective amendment
thereof) which, individually or in the aggregate, represent a fundamental change
in the information set forth in the registration statement; notwithstanding the
foregoing, any increase or decrease in volume of securities offered (if the
total dollar value of securities offered would not exceed that which was
registered) and any deviation from the low or high end of the estimated maximum
offering range may be reflected in the form of prospectus filed with the
Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume
and price represent no more than a 20% change in the maximum aggregate offering
price set forth in the "Calculation of Registration Fee" table in the effective
registration statement; and (iii) to include any material information with
respect to the plan of distribution not previously disclosed in the registration
statement or any material change to such information in the registration
statement; provided, however, that paragraphs (1)(i) and (1)(ii) do not apply if
the registration statement is on Form S-3 or Form S-8, and the information
required to be included in a post-effective amendment by those paragraphs is
contained in periodic reports filed with or furnished to the Commission by the
registrant pursuant to section 13 or section 15(d) of the Securities Exchange
Act of 1934 that are incorporated by reference in the registration statement;

    (2) That, for the purpose of determining any liability under the Securities
Act of 1933, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities

                                      II-2

offered therein, and the offering of such securities at that time shall be
deemed to be the initial bona fide offering thereof; and

    (3) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of the
offering.

    The undersigned Registrant hereby undertakes 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 that is incorporated by reference in the
registration statement shall be deemed to be a new registration statement
relating to the securities offered herein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

    The undersigned Registrant hereby undertakes that (i) 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 and (ii) 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.

    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 provisions set forth in Item 15, or otherwise, 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 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 the final adjudication of
such issue.

                                      II-3

                                   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 registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Baltimore, State of Maryland, on October 19, 2001.



                                                      
                                                       LEGG MASON, INC.
                                                       (Registrant)

                                                       By   *
                                                            -----------------------------------------
                                                            Name: Raymond A. Mason
                                                            Title:  Chairman of the Board, President
                                                            and Chief Executive Officer



    Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities and on the dates indicated.





              SIGNATURES                                  TITLE                          DATE
              ----------                                  -----                          ----
                                                                            
                   *                     Chairman of the Board, President, Chief
    -------------------------------        Executive Officer and Director          October 19, 2001
           Raymond A. Mason                (Principal Executive Officer)

                   *                     Senior Vice President and Treasurer
    -------------------------------        (Principal Financial and Accounting     October 19, 2001
           Thomas L. Souders               Officer)

                   *
    -------------------------------                     Director                   October 19, 2001
           James W. Brinkley

                   *
    -------------------------------                     Director                   October 19, 2001
        Edmund J. Cashman, Jr.

                   *
    -------------------------------                     Director                   October 19, 2001
          Harry M. Ford, Jr.

                   *
    -------------------------------                     Director                   October 19, 2001
        Nicholas J. St. George

                   *
    -------------------------------                     Director                   October 19, 2001
         Richard J. Himelfarb

                   *
    -------------------------------                     Director                   October 19, 2001
            James E. Ukrop



                                      II-4





              SIGNATURES                                  TITLE                          DATE
              ----------                                  -----                          ----
                                                                            
                   *
    -------------------------------                     Director                   October 19, 2001
            Harold L. Adams

                   *
    -------------------------------                     Director                   October 19, 2001
         John E. Koerner, III

                   *
    -------------------------------                     Director                   October 19, 2001
           Roger W. Schipke

                   *
    -------------------------------                     Director                   October 19, 2001
           Edward I. O'Brien

                   *
    -------------------------------                     Director                   October 19, 2001
           Peter F. O'Malley





                                                                                 
*By:                   /s/ ROBERT F. PRICE
             --------------------------------------
                         Robert F. Price
                        ATTORNEY-IN-FACT



                                      II-5