FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person * WIJNBERG SANDRA S   2. Issuer Name and Ticker or Trading Symbol MARSH & MCLENNAN COMPANIES, INC. [MMC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Sr. Vice Pres./CFO (Last) (First) (Middle) 1166 AVENUE OF THE AMERICAS 3. Date of Earliest Transaction (Month/Day/Year) 05/18/2005 (Street) NEW YORK, NY 10036 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/30/2005   P V 2.8774 (1) A $ 30.5278 79,816.0887 D   Common Stock 05/13/2005   P V 3.0642 (1) A $ 28.823 79,819.1529 D   Common Stock 05/18/2005   A   20,900 (2) A $ 0 (3) 100,719.1529 D   Common Stock - SIP 03/31/2005   P V 11.1786 (4) A $ 0 (4) 1,438.3297 I Stock Investment Plan (401K)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.		SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Restricted Stk. Units -SISP

(5)

03/31/2005

P

V

24.0094 (6)

(3)

(3)

Common Stock

24.0094

$ 0 (6)

4,359.8759

D

Restricted Stock Units - Bonus Deferral Plan

(5)

03/30/2005

P

V

145.663 (7)

(3)

(3)

Common Stock

145.663

$ 30.7

26,450.614 (8)

D

Restricted Stock Units - Bonus Deferral Plan

(5)

05/13/2005

P

V

156.84 (7)

(3)

(3)

Common Stock

156.84

$ 28.67

26,607.454 (8)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
WIJNBERG SANDRA S 1166 AVENUE OF THE AMERICAS NEW YORK, NY 10036			Sr. Vice Pres./CFO

Signatures

Leon J. Lichter, Attorney-in-Fact		05/20/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(2)	Grant of restricted stock pursuant to MMC 2000 Senior Executive Incentive and Stock Award Plan.
(5)	The security converts to MMC Common Stock on a 1-for-1 basis
(7)	Reflects dividends that were acquired on shares held in reporting person's MMC Bonus Award Voluntary Deferral Plan account.
(6)	Reflects additional shares acquired by the Stock Investment Supplemental Plan (SISP) Custodian at prevailing market prices. Information reported herein is based on reporting person's Plan Statement as of March 31, 2005.
(4)	Reflects additional shares acquired by the Stock Investment Plan (SIP) Custodian at prevailing market prices. Information reported herein is based on reporting person's Plan Statement as of March 31, 2005.
(1)	Reflects shares acquired pursuant to dividend reinvestment at prevailing market prices.
(3)	Not Applicable
(8)	Balance has been reduced by 102.928 units which were reported twice.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.