-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 UwuIsZ5PCNo857fZ8Xng9H19nq/GOKSit512Cpb4h5sWp+3IhbgyHNc6YiYPXthC
 YBe2PJSTKhyGZm0XE/cqUw==

<SEC-DOCUMENT>0001193125-09-255273.txt : 20091218
<SEC-HEADER>0001193125-09-255273.hdr.sgml : 20091218
<ACCEPTANCE-DATETIME>20091218060420
ACCESSION NUMBER:		0001193125-09-255273
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20091218
DATE AS OF CHANGE:		20091218

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GALLAGHER ARTHUR J & CO
		CENTRAL INDEX KEY:			0000354190
		STANDARD INDUSTRIAL CLASSIFICATION:	INSURANCE AGENTS BROKERS & SERVICES [6411]
		IRS NUMBER:				362151613
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-152710
		FILM NUMBER:		091248541

	BUSINESS ADDRESS:	
		STREET 1:		TWO PIERCE PLACE
		CITY:			ITASCA
		STATE:			IL
		ZIP:			60143
		BUSINESS PHONE:		6307733800

	MAIL ADDRESS:	
		STREET 1:		TWO PIERCE PLACE
		CITY:			ITASCA
		STATE:			IL
		ZIP:			60143-3141
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>d424b3.htm
<DESCRIPTION>AMENDMENT #18 PROSPECTUS SUPPLEMENT
</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g92744snap2.gif
<DESCRIPTION>GRAPHIC
</DOCUMENT>
</SUBMISSION>