THIS DOCUMENT CONSTITUTES PART OF A PROSPECTUS COVERING SECURITIES THAT HAVE
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933.

                        MARSH & McLENNAN COMPANIES, INC.
                                  U.S. EMPLOYEE
                  2001 CASH BONUS AWARD VOLUNTARY DEFERRAL PLAN

1.     ELIGIBILITY

       All active U.S. employees of Marsh & McLennan Companies, Inc. (the
       "Corporation") and its subsidiaries who are designated as eligible for
       participation in the MMC Partners Bonus Plan or a Local Bonus Plan, and
       who are presently in salary grade 15 (or its equivalent) or above, may,
       at management's discretion, be considered for participation in the Marsh
       & McLennan Companies, Inc. U.S. Employee 2001 Cash Bonus Award Voluntary
       Deferral Plan (the "2001 Plan"). Participants in the 2001 Plan may make
       deferral elections pursuant to the rules outlined in Section 2 below.

2.     PROGRAM RULES

       Except as otherwise provided herein, the 2001 Plan shall be administered
       by the Compensation Committee of the Board of Directors of the
       Corporation (the "Committee"). The Committee shall have authority in its
       sole discretion to interpret the 2001 Plan and make all determinations,
       including the determination of bonus awards eligible to be deferred, with
       respect to the 2001 Plan. All determinations made by the Committee shall
       be final and binding. The Committee may delegate to any other individual
       or entity the authority to perform any or all of the functions of the
       Committee under the 2001 Plan, and references to the Committee shall be
       deemed to include any such delegate. Exercise of deferral elections under
       the 2001 Plan must be made in accordance with the following rules.

       a.     RIGHTS TO AN AWARD AND TO A DEFERRAL ELECTION

              (i)    2001 CASH BONUS DEFERRAL. The right of an employee to a
                     deferral election currently applies to the annual cash
                     bonus scheduled to be awarded in early 2002 in respect of
                     2001 services, the payment of which bonus would normally be
                     made by the end of the first quarter of the 2002 calendar
                     year. The granting of such an annual cash bonus award is
                     discretionary, and neither delivery of deferral election
                     materials nor an election to defer shall affect entitlement
                     to such an award. The right to a deferral election does not
                     apply to bonuses (including, but not limited to, sign-on
                     bonuses, commissions or non-annual incentive payments) that
                     are not awarded as part of an annual cash bonus plan.

              (ii)   2002 CASH BONUS DEFERRAL. The right of an employee to a
                     deferral election currently applies to the annual cash
                     bonus scheduled to be awarded in early 2003 in respect of
                     2002 services, should the employee have a guarantee for the
                     bonus, the payment of which would normally be made by the
                     end of the first quarter of the 2003 calendar year. The
                     deferral of such a bonus will be made pursuant to the U.S.
                     Employee 2002 Cash Bonus Award Voluntary Deferral Plan (the
                     "2002 Plan") and is contingent upon approval of the 2002
                     Plan by the Committee. The terms and conditions for the
                     2002 Plan are expected to be essentially the same as for
                     the 2001 Plan.

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       b.     ELECTION FORMS

              In order to ensure that elections to defer bonus amounts
              (including such amounts for 2002 cash bonuses with a guarantee)
              are effective under applicable tax laws, please complete and sign
              the attached election form(s), and return them (postmarked,
              delivered or faxed) no later than December 3, 2001. Form(s) should
              be returned, and any questions should be directed, to:

                                        Brian A. Kenny
                       Manager, Compensation Systems and Administration
                               Marsh & McLennan Companies, Inc.
                                  1166 Avenue of the Americas
                                    New York, NY 10036-2774
                                  Telephone #: (212) 345-5287
                                  Facsimile #: (212) 345-4767

       c.     DEFERRAL OPTIONS

              (i)    DEFERRAL AMOUNT. An eligible employee may elect to defer a
                     portion of such employee's bonus award until January of a
                     specific year ("year certain") or until January of the year
                     following retirement in an amount represented by one of the
                     following two choices:

                     1.     25%, 50% or 75% of the employee's cash bonus award,
                            subject to a maximum limit established by the
                            Committee, or

                     2.     the lowest of 25%, 50% or 75% of the employee's cash
                            bonus award which results in a deferral of at least
                            $10,000.

                     If the percentage selected times the amount of the cash
                     bonus award is less than $10,000, NO deferral will be made
                     or deducted from the award.

              (ii)   2001 DEFERRED BONUS ACCOUNTS. If a deferral election is
                     made, deferrals may be made into one or both of the two
                     accounts which the Corporation shall make available to the
                     participating employee. The relevant portion of the award
                     deferral will be credited to the relevant account on the
                     first business day following the date on which the bonus
                     payment would have been made had it not been deferred. The
                     available accounts for deferrals of bonuses (the "2001
                     Deferred Bonus Accounts") shall consist of (a) the 2001
                     Putnam Fund Account and (b) the 2001 Corporation Stock
                     Account. Amounts may not be transferred between the 2001
                     Corporation Stock Account and the 2001 Putnam Fund Account.

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       d.     2001 PUTNAM FUND ACCOUNT

              (i)    ACCOUNT VALUATION. The 2001 Putnam Fund Account is a
                     bookkeeping account, the value of which shall be based upon
                     the performance of selected funds of the Putnam mutual fund
                     group. The Corporation will determine, in its sole
                     discretion, the funds of the Putnam mutual fund group into
                     which deferrals may be made. Deferrals among selected funds
                     comprising the 2001 Putnam Fund Account must be made in
                     multiples of 5% of the total amounts deferred into the 2001
                     Putnam Fund Account. Deferred amounts will be credited to
                     the 2001 Putnam Fund Account with units each reflecting one
                     Class Y share of the elected fund. Fractional units will
                     also be credited to such account, if applicable. The number
                     of such credited units will be determined by dividing the
                     value of the bonus award deferred into the elected fund by
                     the net asset value of such fund of the 2001 Putnam Fund
                     Account as of the close of business on the day on which
                     such bonus payment would have been made had it not been
                     deferred. All dividends paid with respect to an elected
                     fund of a 2001 Putnam Fund Account will be deemed to be
                     immediately reinvested in such fund.

              (ii)   FUND REALLOCATIONS. Amounts deferred into a 2001 Putnam
                     Fund Account may be reallocated between eligible funds of
                     these respective accounts pursuant to an election which may
                     be made daily. Such election shall be effective, and the
                     associated reallocation shall be based upon the net asset
                     values of the applicable funds of the 2001 Putnam Fund
                     Account, as of the close of business on the business day
                     the election is received by facsimile or mail, if received
                     by 2:30 p.m. Eastern Time of that day. If received later
                     than 2:30 p.m., the election shall be effective as of the
                     close of business on the following business day.

       e.     2001 CORPORATION STOCK ACCOUNT

              (i)    ACCOUNT VALUATION. The 2001 Corporation Stock Account is a
                     bookkeeping account, the value of which shall be based upon
                     the performance of the common stock of the Corporation.
                     Amounts deferred into the 2001 Corporation Stock Account
                     will be credited to such account with units each reflecting
                     one share of common stock of the Corporation. Fractional
                     units will also be credited to such account, if applicable.
                     The number of such credited units will be determined by
                     dividing the value of the bonus award deferred into the
                     2001 Corporation Stock Account (plus the "supplemental
                     amount" referred to in clause (ii) below) by the closing
                     price of the common stock of the Corporation on the New
                     York Stock Exchange on the day on which such bonus payment
                     would have been made had it not been deferred. Dividends
                     paid on the common stock of the Corporation shall be
                     reflected in a participant's 2001 Corporation Stock Account
                     by the crediting of additional units in such account equal
                     to the value of the dividend and based upon the closing
                     price of the common stock of the Corporation on the New
                     York Stock Exchange on the date such dividend is paid.
                     Deferrals into the 2001 Corporation Stock Account must be
                     deferred to a date not earlier than January 1, 2005. (For
                     deferrals relating to 2002 bonuses with a guarantee, such
                     deferrals will be allocated into the 2002 Corporation Stock
                     Account and must be deferred to a date not earlier than
                     January 1, 2006.)

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              (ii)   SUPPLEMENTAL AMOUNT. With respect to that portion of a
                     bonus award which a participating employee defers into the
                     2001 Corporation Stock Account, there shall be credited to
                     such participant's 2001 Corporation Stock Account an amount
                     equal to the amount deferred into such account plus an
                     additional amount equal to 15% of the amount so deferred
                     (the "supplemental amount"). The maximum percentage of any
                     participating employee's annual bonus award permitted to be
                     deferred into the 2001 Corporation Stock Account (prior to
                     giving effect to the supplemental amount) is 50% of such
                     award.

              (iii)  STOCK DISTRIBUTIONS. Distributions from the 2001
                     Corporation Stock Account will be deposited automatically
                     via book entry for your personal account with the
                     Corporation's stock transfer agent. If you (or you and your
                     spouse, as joint tenants) already have such an account with
                     the stock transfer agent, then the shares will be deposited
                     into that account. If you do not have such an account, then
                     one will be established in your name, and the shares will
                     be deposited in the account.

       f.     STATEMENT OF ACCOUNT

              The Corporation shall provide periodically to each participant
              (but not less frequently than once per calendar quarter) a
              statement setting forth the balance to the credit of such
              participant in such participant's 2001 Deferred Bonus Accounts.

       g.     IRREVOCABILITY AND ACCELERATION

              Subject to the provisions of paragraphs h. (iii) and h. (vii)
              below, all deferral elections made under the 2001 Plan (and the
              2002 Plan) are irrevocable. However, the Committee may, in its
              sole discretion, and upon finding that a participant has
              demonstrated severe financial hardship, direct the acceleration of
              the payment of any or all deferred amounts then credited to the
              participant's 2001 Deferred Bonus Accounts.

       h.     PAYMENT OF DEFERRED AMOUNTS

              (i)    YEAR CERTAIN DEFERRALS. If the participant remains employed
                     until the deferral year elected, all amounts relating to
                     "year certain" deferrals will be paid in a single
                     distribution, less applicable withholding taxes, in January
                     of the deferral year elected, or the participant may elect
                     (at the time of the original deferral election) to have
                     distributions from the 2001 Corporation Stock Account or
                     the 2001 Putnam Fund Account, as the case may be, made in
                     up to fifteen (15) annual installments payable each January
                     commencing with the deferral year elected. Annual
                     installments will be paid in an amount, less applicable
                     withholding taxes, determined by multiplying (i) the
                     balance of the 2001 Corporation Stock Account or the 2001
                     Putnam Fund Account, as the case may be, by (ii) a
                     fraction, the numerator of which is 1 and the denominator
                     of which is a number equal to the remaining unpaid annual
                     installments.

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              (ii)   RETIREMENT DEFERRALS. For participants who retire, amounts
                     relating to deferrals until the year following retirement
                     will be paid in a single distribution in January of the
                     year following retirement, or the participant may elect (at
                     the time of the original deferral election) to have
                     distributions from the 2001 Corporation Stock Account or
                     2001 Putnam Fund Account, as the case may be, made in up to
                     fifteen (15) annual installments payable each January
                     commencing with the year following retirement. Annual
                     installments will be paid in an amount, less applicable
                     withholding taxes, determined by multiplying (i) the
                     balance of the 2001 Corporation Stock Account or 2001
                     Putnam Fund Account, as the case may be, by (ii) a
                     fraction, the numerator of which is 1 and the denominator
                     of which is a number equal to the remaining unpaid annual
                     installments.

              (iii)  REDEFERRAL ELECTION. Participants shall be permitted to
                     delay the beginning date of distribution and/or increase
                     the number of annual installments (up to the maximum number
                     permitted under the 2001 Plan) for awards previously
                     deferred or redeferred under the 2001 Plan (and the 2002
                     Plan), provided that the redeferral election must be made
                     at least one full calendar year prior to the beginning date
                     of distribution.

              (iv)   TERMINATION OF EMPLOYMENT PRIOR TO END OF DEFERRAL PERIOD.
                     Subject to the provisions of paragraph (vi) below, in the
                     event of termination of employment for any reason prior to
                     completion of the elected deferral period, all amounts then
                     in the participant's 2001 Deferred Bonus Accounts will be
                     paid to the participant (or the participant's designated
                     beneficiary in the event of death) in a single
                     distribution, less applicable withholding taxes, as soon as
                     practicable after the end of the quarter in which the
                     termination occurred; PROVIDED, HOWEVER, that, subject to
                     the provisions of paragraph (vi) below, upon a
                     participant's retirement or termination for total
                     disability prior to completion of the elected deferral
                     period, all such amounts shall be paid in January of the
                     year following such retirement or termination for total
                     disability, as the case may be.

              (v)    DEATH DURING INSTALLMENT PERIOD. If a participant dies
                     after the commencement of payments from his or her 2001
                     Deferred Bonus Accounts, the designated beneficiary shall
                     receive the remaining installments over the elected
                     installment period.

              (vi)   SPECIAL RULES APPLICABLE TO 2001 CORPORATION STOCK ACCOUNT.
                     Notwithstanding any provision in the 2001 Plan to the
                     contrary (other than the second sentence of Section 2.i.
                     above), with respect to a participant's 2001 Corporation
                     Stock Account, in the event that prior to January 1, 2005,
                     a participant's employment terminates for total disability
                     or retirement, all amounts in such account will be paid to
                     the participant, less applicable withholding taxes, in
                     January of 2005. In the event that, prior to January 2005,
                     a participant's employment terminates on account of death,
                     or a participant whose employment was earlier terminated
                     for total disability or retirement should die, the
                     distribution rule in paragraph (iv) above will apply. If,
                     however, the termination of employment prior to January 1,
                     2005 is on account of a reason other than death, total
                     disability or retirement, the participant will receive, as
                     soon as practicable following the end of the quarter in
                     which the termination occurred, a single distribution, less
                     applicable withholding taxes, of (a) the balance of the
                     participant's 2001 Corporation

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                     Stock Account less (b) the portion of such balance
                     attributable to the supplemental amount (including earnings
                     thereon), which portion shall be forfeited in its entirety.
                     For purposes of determining the portion of the balance of
                     the 2001 Corporation Stock Account attributable to the
                     supplemental amount, the supplemental amount shall be
                     increased or decreased by the respective gain or loss in
                     the 2001 Corporation Stock Account attributable to such
                     supplemental amount.

              (vii)  ACCELERATION OF DISTRIBUTION. A participant may elect to
                     accelerate the distribution of all or a portion of the 2001
                     Deferred Bonus Accounts for any reason prior to the
                     completion of the elected deferral period, subject to the
                     imposition of a significant penalty in accordance with
                     applicable tax rules. The penalty shall be an account
                     forfeiture equal to (i) 6% of the amount that the
                     participant elects to have distributed from the 2001
                     Deferred Bonus Accounts and (ii) 100% of any unvested
                     supplemental amount as provided in Section 2(e)(ii) above,
                     including related earnings, that the participant elects to
                     have distributed from the 2001 Corporation Stock Account.
                     Amounts distributed to the participant will be subject to
                     applicable tax withholding, but amounts forfeited will not
                     be subject to tax.

              (viii) CHANGE IN CONTROL. Notwithstanding any other provision in
                     the 2001 Plan to the contrary, in the event of a "change in
                     control" of the Corporation, as defined in the
                     Corporation's 2000 Senior Executive Incentive and Stock
                     Award Plan (the "2000 Senior Executive Plan") and 2000
                     Employee Incentive and Stock Award Plan (the "2000 Employee
                     Plan"), all amounts credited to a participant's 2001
                     Deferred Bonus Accounts as of the effective date of such
                     change in control will be distributed within five days of
                     such change in control as a lump sum cash payment, less
                     applicable withholding taxes.

              (ix)   FORM OF PAYMENT. All payments in respect of the 2001 Putnam
                     Fund Account shall be made in cash and payments in respect
                     of the 2001 Corporation Stock Account shall be made in
                     shares of common stock of the Corporation; provided,
                     however, that in the event of a change in control of the
                     Corporation, payments from the 2001 Corporation Stock
                     Account shall be made in cash based upon (A) the highest
                     price paid for shares of common stock of the Corporation in
                     connection with such change in control or (B) if shares of
                     common stock of the Corporation are not purchased or
                     exchanged in connection with such change in control, the
                     closing price of the common stock of the Corporation on the
                     New York Stock Exchange on the last trading day on the New
                     York Stock Exchange prior to the date of the change in
                     control.

       i.     TAX TREATMENT

              Under present Federal income tax laws, no portion of the balance
              credited to a participant's 2001 Deferred Bonus Accounts will be
              includable in income for Federal income tax purposes during the
              period of deferral. However, FICA tax withholding is required
              currently on the cash bonus amount (excluding any portion subject
              to a mandatory deferral) awarded to the participant, and such
              withholding is required on the supplemental amount in January of
              2005. When any part of the 2001 Deferred Bonus Accounts is
              actually paid to the participant, such portion will be includable
              in income, and Federal, state and local income tax withholding
              will

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              apply. The Corporation may make necessary arrangements in order to
              effectuate any such withholding, including the mandatory
              withholding of shares of common stock of the Corporation which
              would otherwise be distributed to a participant.

       j.     BENEFICIARY DESIGNATION

              Each participant shall have the right, at any time, to designate
              any person or persons as beneficiary or beneficiaries (both
              principal and contingent) to whom payment shall be made under the
              2001 Plan and every other Cash Bonus Award Voluntary Deferral Plan
              for which the participant has or will have an account balance
              (collectively, including the 2001 Plan, "the Plans"), in the event
              of death prior to complete distribution to the participant of the
              amounts due under the Plans. Any beneficiary designation may be
              changed by a participant by the filing of such change in writing
              on a form prescribed by the Corporation. The filing of a new
              beneficiary designation form will cancel all beneficiary
              designations previously filed and apply to all deferrals in the
              account. A beneficiary designation form is attached for use by a
              participant who either does not have such form on file or wishes
              to make a change in the beneficiary designation. Upon completion
              of the attached form, it should be forwarded to Brian Kenny, at
              the address set forth in Section 2.b. above. If a participant does
              not have a beneficiary designation in effect, or if all designated
              beneficiaries predecease the participant, then any amounts payable
              to the beneficiary shall be paid to the participant's estate. The
              payment to the designated beneficiary or to the participant's
              estate shall completely discharge the Corporation's obligations
              under the Plans.

       k.     CHANGES IN CAPITALIZATION

              If there is any change in the number or class of shares of common
              stock of the Corporation through the declaration of stock dividend
              or other extraordinary dividends, or recapitalization resulting in
              stock splits, or combinations or exchanges of such shares or in
              the event of similar corporate transactions, each participant's
              2001 Corporation Stock Account shall be equitably adjusted by the
              Committee to reflect any such change in the number or class of
              issued shares of common stock of the Corporation or to reflect
              such similar corporate transaction.

3.     AMENDMENT AND TERMINATION OF THE 2001 PLAN

       The Committee may, at its discretion and at any time, amend the 2001 Plan
       in whole or in part. The Committee may also terminate the 2001 Plan in
       its entirety at any time and, upon any such termination, each participant
       shall be paid in a single distribution, or over such period of time as
       determined by the Committee (not to extend beyond the earlier of 15 years
       or the elected deferral period), the then remaining balance in such
       participant's 2001 Deferred Bonus Accounts.

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4.     MISCELLANEOUS

       a.     A participant under the 2001 Plan is merely a general (not
              secured) creditor, and nothing contained in the 2001 Plan shall
              create a trust of any kind or a fiduciary relationship between the
              Corporation and the participant or the participant's estate.
              Nothing contained herein shall be construed as conferring upon the
              participant the right to continued employment with the Corporation
              or its subsidiaries, or to a cash bonus award. Except as otherwise
              provided by applicable law, benefits payable under the 2001 Plan
              may not be assigned or hypothecated, and no such benefits shall be
              subject to legal process or attachment for the payment of any
              claim of any person entitled to receive the same. The adoption of
              the 2001 Plan and any elections made pursuant to the 2001 Plan are
              subject to approval of the 2001 Plan by the Committee.

       b.     Participation in the 2001 Plan is subject to these terms and
              conditions and to the terms and conditions of (i) the 2000 Senior
              Executive Plan with respect to those participants hereunder who
              are subject thereto and (ii) the 2000 Employee Plan with respect
              to all other participants. Participation in the 2001 Plan shall
              constitute an agreement by the participant to all such terms and
              conditions and to the administrative regulations of the Committee.
              In the event of any inconsistency between these terms and
              conditions and the provisions of the 2000 Senior Executive Plan or
              the 2000 Employee Plan, as applicable, the provisions of the
              latter shall prevail. The 2000 Senior Executive Plan and the 2000
              Employee Plan are not subject to any of the provisions of the
              Employee Retirement Income Security Act Of 1974.

       c.     Not more than four million (4,000,000) shares of the Corporation's
              common stock, plus such number of shares remaining unused under
              pre-existing stock plans approved by the Corporation's
              stockholders, may be issued under the 2000 Senior Executive Plan.

       d.     Not more than forty million (40,000,000) shares of the
              Corporation's common stock, plus such number of shares authorized
              and reserved for awards pursuant to certain preexisting share
              resolutions adopted by the Corporation's Board of Directors, may
              be issued under the 2000 Employee Plan.

5.     INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

       The Annual Report on Form 10-K of the Corporation for its last fiscal
       year, the Corporation's Registration Statement on Form 8 dated February
       3, 1987, describing Corporation common stock, including any amendment or
       reports filed for the purpose of updating such description, and the
       Corporation's Registration Statement on Form 8-A/A dated January 26,
       2000, describing the Preferred Stock Purchase Rights attached to the
       common stock, including any further amendment or reports filed for the
       purpose of updating such description, which have been filed by the
       Corporation under the Securities Exchange Act of 1934, as amended (the
       Exchange Act), are incorporated by reference herein.

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       All documents subsequently filed by the Corporation pursuant to Sections
       13(a), 13(c), 14 and 15(d) of the Exchange Act, subsequent to the end of
       the Corporation's last fiscal year and prior to the filing of a
       post-effective amendment which indicates that all securities offered have
       been sold or which deregisters all securities then remaining unsold,
       shall be deemed to be incorporated by reference herein and to be a part
       hereof from the date of filing of such documents.

       Participants may receive without charge, upon written or oral request, a
       copy of any of the documents incorporated herein by reference and any
       other documents that constitute part of this Prospectus by contacting Mr.
       Brian Kenny, Manager, Compensation Systems and Administration, as
       indicated above.

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