Washington, D.C. 20549


                                                 FORM 8-K

                                              CURRENT REPORT

                                 PURSUANT TO SECTION 13 OR 15(d) OF THE
                                     SECURITIES EXCHANGE ACT OF 1934

                                              April 23, 2003
                                    (Date of earliest event reported)

                                     Marsh & McLennan Companies, Inc.
                          (Exact name of registrant as specified in its charter)

              Delaware                            1-5998                           36-2668272
-----------------------------------  --------------------------------  ----------------------------------
  (State or other jurisdiction of        (Commission File Number)       (IRS Employer Identification No.)

1166 Avenue of the Americas, New York, NY                                               10036
(Address of principal executive offices)                                              (Zip Code)

                                               (212) 345-5000
                            (Registrant's telephone number, including area code)

Item 7.  Financial Statements and Exhibits.

         (a) None.

         (b) None.

         (c) Exhibits.

             99.1. Press Release dated April 23, 2003.

Item 9.  Regulation FD Disclosure.

     This information is being provided under new Item 12 of Form 8-K, "Results
of Operations and Financial Condition", pursuant to interim guidance provided by
the Securities and Exchange Commission.

     On April 23, 2003, Marsh & McLennan Companies, Inc. issued a press release
announcing its unaudited first quarter financial results for the quarter ended
March 31, 2003. A copy of the press release is attached to this Report as an
exhibit and is incorporated herein by reference.


         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                           MARSH & McLENNAN COMPANIES, INC.

                                           By:   /s/ Gregory F. Van Gundy
                                           Name:   Gregory F. Van Gundy
                                           Title:  Secretary

Date:  April 23, 2003

Exhibit Index

Exhibit (99.1): Press release dated April 23, 2003.