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    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		22
    CONFORMED PERIOD OF REPORT:	20170518
    FILED AS OF DATE:		20170331
    DATE AS OF CHANGE:		20170331
    EFFECTIVENESS DATE:		20170331

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MARSH & MCLENNAN COMPANIES, INC.
    		CENTRAL INDEX KEY:			0000062709
    		STANDARD INDUSTRIAL CLASSIFICATION:	INSURANCE AGENTS BROKERS & SERVICES [6411]
    		IRS NUMBER:				362668272
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

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    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-05998
    		FILM NUMBER:		17730369

    	BUSINESS ADDRESS:
    		STREET 1:		1166 AVENUE OF THE AMERICAS
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10036
    		BUSINESS PHONE:		2123455000

    	MAIL ADDRESS:
    		STREET 1:		1166 AVENUE OF THE AMERICAS
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10036

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	MARSH & MCLENNAN COMPANIES INC
    		DATE OF NAME CHANGE:	19920703

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	MARLENNAN CORP
    		DATE OF NAME CHANGE:	19760505
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