Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  SINNOTT JOHN T
 2. Date of Event Requiring Statement (Month/Day/Year)
07/01/2005		 3. Issuer Name and Ticker or Trading Symbol
MARSH & MCLENNAN COMPANIES, INC. [MMC]
(Last)
(First)
(Middle)
1166 AVENUE OF THE AMERICAS		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Vice Chair, Office of CEO
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

NEW YORK, NY 10036		 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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 396
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Units   (1)   (1) Common Stock 155,948 $ (1) D  
Stock Options (Right to buy)   (2) 03/19/2007 Common Stock 60,000 $ 20.6354 D  
Stock Options (Right to buy)   (3) 03/18/2008 Common Stock 76,800 $ 30.125 D  
Stock Options (Right to buy)   (4) 03/17/2009 Common Stock 100,000 $ 37.7656 D  
Stock Options (Right to buy)   (5) 03/14/2011 Common Stock 120,000 $ 46.1 D  
Stock Options (Right to buy)   (6) 01/19/2010 Common Stock 100,000 $ 51.5313 D  
Stock Options (Right to buy)   (7) 03/20/2012 Common Stock 120,000 $ 56 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
SINNOTT JOHN T
1166 AVENUE OF THE AMERICAS
NEW YORK, NY 10036		       Vice Chair, Office of CEO  

Signatures

John T. Sinnott 07/11/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(6) 25% of these options vested on the 20th of January 2001, 2002 and 2003. The remaining 25% of these options vested on July 1, 2003 upon the retirement of the reporting person.
(7) 25% of these options vested on March 21, 2003. The remaining 75% of these options vested on July 1, 2003 upon the retirement of the reporting person.
(4) These options vested in four equal annual installments on March 18th of 2000, 2001, 2002 and 2003.
(2) These options vested in four equal annual installments on March 20th of 1998, 1999, 2000 and 2001.
(3) These options vested in four equal annual installments on March 19th of 1999, 2000, 2001 and 2002.
(5) 25% of these options vested on the 15th of March of 2002 and 2003. The remaining 50% of these options vested on July 1, 2003 upon the retirement of the reporting person.
(1) Not Applicable

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