<SEC-DOCUMENT>0001193125-18-231497-index.html : 20180730
<SEC-HEADER>0001193125-18-231497.hdr.sgml : 20180730
<ACCEPTANCE-DATETIME>20180730162022
ACCESSION NUMBER:		0001193125-18-231497
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20180730
DATE AS OF CHANGE:		20180730
EFFECTIVENESS DATE:		20180730

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:		S-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-226427
		FILM NUMBER:		18977878

	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>S-3ASR
<SEQUENCE>1
<FILENAME>d581792ds3asr.htm
<DESCRIPTION>S-3ASR
<TEXT>
Document 1 - file: d581792ds3asr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>d581792dex51.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 2 - file: d581792dex51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>d581792dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 3 - file: d581792dex231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-25.1
<SEQUENCE>4
<FILENAME>d581792dex251.htm
<DESCRIPTION>EX-25.1
<TEXT>
Document 4 - file: d581792dex251.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-25.2
<SEQUENCE>5
<FILENAME>d581792dex252.htm
<DESCRIPTION>EX-25.2
<TEXT>
Document 5 - file: d581792dex252.htm

</DOCUMENT>
</SEC-DOCUMENT>