<SEC-DOCUMENT>0001193125-20-082520-index.html : 20200323
<SEC-HEADER>0001193125-20-082520.hdr.sgml : 20200323
<ACCEPTANCE-DATETIME>20200323163402
ACCESSION NUMBER:		0001193125-20-082520
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		7
FILED AS OF DATE:		20200323
DATE AS OF CHANGE:		20200323
EFFECTIVENESS DATE:		20200323

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Arthur J. Gallagher & Co.
		CENTRAL INDEX KEY:			0000354190
		STANDARD INDUSTRIAL CLASSIFICATION:	INSURANCE AGENTS BROKERS & SERVICES [6411]
		IRS NUMBER:				362151613
		STATE OF INCORPORATION:			IL
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09761
		FILM NUMBER:		20735275

	BUSINESS ADDRESS:	
		STREET 1:		2850 GOLF ROAD
		CITY:			ROLLING MEADOWS
		STATE:			IL
		ZIP:			60008-4050
		BUSINESS PHONE:		630-773-3800

	MAIL ADDRESS:	
		STREET 1:		2850 GOLF ROAD
		CITY:			ROLLING MEADOWS
		STATE:			IL
		ZIP:			60008-4050

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ARTHUR J. GALLAGHER & CO.
		DATE OF NAME CHANGE:	20190819

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GALLAGHER ARTHUR J & CO
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
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<SEQUENCE>1
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<TEXT>
Document 1 - file: d857229ddefa14a.htm

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<SEQUENCE>2
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<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g857229dsp0007a.jpg

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<SEQUENCE>3
<FILENAME>g857229dsp0008c.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g857229dsp0008c.jpg

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<SEQUENCE>4
<FILENAME>g857229dsp010.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g857229dsp010.jpg

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<SEQUENCE>5
<FILENAME>g857229dsp07.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g857229dsp07.jpg

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<SEQUENCE>6
<FILENAME>g857229dsp08.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g857229dsp08.jpg

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<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g857229dsp09.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g857229dsp09.jpg

</DOCUMENT>
</SEC-DOCUMENT>