<SEC-DOCUMENT>0001193125-18-063545-index.html : 20180228
<SEC-HEADER>0001193125-18-063545.hdr.sgml : 20180228
<ACCEPTANCE-DATETIME>20180228145256
ACCESSION NUMBER:		0001193125-18-063545
CONFORMED SUBMISSION TYPE:	424B2
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20180228
DATE AS OF CHANGE:		20180228

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

	FILING VALUES:
		FORM TYPE:		424B2
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-206217
		FILM NUMBER:		18650310

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B2
<SEQUENCE>1
<FILENAME>d506975d424b2.htm
<DESCRIPTION>FINAL PROSPECTUS SUPPLEMENT
<TEXT>
Document 1 - file: d506975d424b2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g506975g87r83.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g506975g87r83.jpg

</DOCUMENT>
</SEC-DOCUMENT>