SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q/A

Amendment No. 1

Quarterly Report Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

For the quarterly period ended June 30, 2009

Marsh & McLennan Companies, Inc.

1166 Avenue of the Americas

New York, New York 10036

(212) 345-5000

Commission file number 1-5998

State of Incorporation: Delaware

I.R.S. Employer Identification No. 36-2668272

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large Accelerated Filer  x	Accelerated Filer  ¨	Non-Accelerated Filer  ¨	Smaller Reporting Company  ¨
		(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

As of July 31, 2009, there were outstanding 523,825,031 shares of common stock, par value $1.00 per share, of the registrant.

Explanatory Note

Amendment No. 1 to Form 10-Q for the quarterly period ended June 30, 2009, is filed solely to provide Exhibit 101 in accordance with Rule 405(a)(2) of Regulation S-T.

No other changes have been made to the Form 10-Q. This Form 10-Q/A speaks as of the original filing date of the Form 10-Q, does not reflect events that may have occurred subsequent to the original filing date, and does not modify or update in any way disclosures made in the Form 10-Q.

Pursuant to Rule 406T of Regulation S-T, the interactive data filed on Exhibit 101 hereto are deemed not filed or part of a registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of section 18 of the Securities and Exchange Act of 1934, as amended, and otherwise are not subject to liability under those sections.

Item 6. Exhibits

See Exhibit Index.

SIGNATURES

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 thereunto duly authorized.

Date: August 10, 2009	/s/ Vanessa A. Wittman
	Vanessa A. Wittman
	Executive Vice President & Chief Financial Officer
Date: August 10, 2009	/s/ Robert J. Rapport
	Robert J. Rapport
	Senior Vice President & Controller
	(Chief Accounting Officer)

EXHIBIT INDEX

Exhibit No.	Description of Exhibit
10.1*	Marsh & McLennan Companies, Inc. Directors’ Stock Compensation Plan - May 31, 2009 Restatement
10.2*	Description of compensation arrangements for non-executive directors of MMC effective June 1, 2009
10.3*	Employment Agreement, dated as of March 20, 2008, by and between Marsh & McLennan Companies, Inc. and Simon V. Freakley
10.4*	General Release, dated December 15, 2008, between Marsh & McLennan Companies, Inc. and Simon V. Freakley
10.5*	General Release, dated December 11, 2008, between Marsh & McLennan Companies, Inc. and Matthew B. Bartley
10.6*	General Release, dated May 8, 2008, between Marsh & McLennan Companies, Inc. and David H. Spiller
12.1*	Statement Re: Computation of Ratio of Earnings to Fixed Charges
31.1*	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer
31.2*	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer
32.1*	Section 1350 Certifications
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase

* Previously filed.