SEC FORM 3

SEC Form 3

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
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

MOCZARSKI ALEXANDER S

(Last)

(First)

(Middle)

1166 AVENUE OF THE AMERICAS

(Street)

NEW YORK

10036

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
04/20/2011

3. Issuer Name and Ticker or Trading Symbol
MARSH & MCLENNAN COMPANIES, INC. [ MMC ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	President & CEO, Guy Carpenter

5. If Amendment, Date of 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

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	49,269	D

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: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Restricted Stock Units	⁽¹⁾	⁽¹⁾	Common Stock	29,116	⁽²⁾	D
Stock Options (Right to Buy)	⁽³⁾	03/16/2014	Common Stock	9,524	$27.86	D
Stock Options (Right to Buy)	⁽⁴⁾	03/15/2015	Common Stock	50,000	$30.505	D
Stock Options (Right to Buy)	⁽⁵⁾	03/14/2016	Common Stock	19,050	$30.215	D
Stock Options (Right to Buy)	⁽⁶⁾	02/11/2017	Common Stock	5,963	$29.6	D
Stock Options (Right to Buy)	⁽⁷⁾	02/21/2020	Common Stock	61,856	$22.705	D
Stock Options (Right to Buy)	⁽⁸⁾	02/20/2021	Common Stock	22,489	$30.595	D
Stock Options (Right to Buy)	07/01/2007	03/20/2012	Common Stock	3,612	$27.86	D
Stock Options (Right to Buy)	07/01/2007	03/19/2013	Common Stock	7,500	$27.86	D

Explanation of Responses:

1. Not Applicable.

2. The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

3. These options vested in two installments as follows: 7,143 on July 1, 2007 and 2,381 on March 17, 2008.

4. These options vested in four equal annual installments on March 16th of 2006, 2007, 2008, and 2009. These options become exercisable only if, after they are vested, the closing price of Marsh & McLennan Companies common stock is at least 15% higher than the exercise price of the options for ten consecutive trading days.

5. These options vested in four equal annual installments on March 15th of 2007, 2008, 2009, and 2010. These options become exercisable only if, after they are vested, the closing price of Marsh & McLennan Companies common stock is at least 15% higher than the exercise price of the options for ten consecutive trading days.

6. These options vested in four equal annual installments on February 12th of 2008, 2009, 2010, and 2011. These options become exercisable only if, after they are vested, the closing price of Marsh & McLennan Companies common stock is at least 15% higher than the exercise price of the options for ten consecutive trading days.

7. These options vest in four equal annual installments on February 22nd of 2011, 2012, 2013 and 2014.

8. These options vest in four equal annual installments on February 21st of 2012, 2013, 2014 and 2015.

	/s/ Lucy Fato, Attorney-in-Fact	04/22/2011
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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