<SEC-DOCUMENT>0001193125-20-131108.txt : 20200501
<SEC-HEADER>0001193125-20-131108.hdr.sgml : 20200501
<ACCEPTANCE-DATETIME>20200501170036
ACCESSION NUMBER:		0001193125-20-131108
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20200501
DATE AS OF CHANGE:		20200501
EFFECTIVENESS DATE:		20200501

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:		20841648

	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>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d873224ddefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
<HTML><HEAD>
<TITLE>DEFA14A</TITLE>
</HEAD>
 <BODY BGCOLOR="WHITE">

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="4"><B>UNITED STATES </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="4"><B>SECURITIES AND EXCHANGE COMMISSION </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B>Washington, D.C. 20549
</B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B>SCHEDULE 14A </B></FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B>(Rule 14a-101) </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT SIZE="1">&nbsp;</FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B>Information Required In Proxy Statement </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="5"><B>SCHEDULE 14A INFORMATION </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B>Proxy Statement Pursuant to Section 14(a) of the </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="3"><B>Securities Exchange Act of 1934 </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B>(Amendment No.
<U>&nbsp;&nbsp;&nbsp;&nbsp;</U> ) </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px; margin-left:2%; text-indent:-2%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Filed by the Registrant &#9746; &nbsp;&nbsp;Filed by a Party other than the Registrant &#9744;</FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:2%; text-indent:-2%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Check the appropriate box: </FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="3%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#9744;&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Preliminary Proxy Statement </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT SIZE="1">&nbsp;</FONT></P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="3%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#9744;&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Confidential, for Use of the Commission Only&nbsp;(as permitted by Rule 14a-6(e)(2))</B> </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT
SIZE="1">&nbsp;</FONT></P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="3%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#9744;&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Definitive Proxy Statement </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT SIZE="1">&nbsp;</FONT></P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="3%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#9746;&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Definitive Additional Materials </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT SIZE="1">&nbsp;</FONT></P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="3%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#9744;&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Soliciting Material Pursuant to &#167;240.14a-12 </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="3"><B>ARTHUR J. GALLAGHER &amp; CO. </B></FONT></P><HR SIZE="1" NOSHADE STYLE="color:#000000" ALIGN="left"> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>(Name of Registrant as Specified In Its Charter) </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px">&nbsp;</P>
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B>&nbsp;&nbsp;</B></FONT></P><HR SIZE="1" NOSHADE STYLE="color:#000000" ALIGN="left">
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(Name of Person(s) Filing Proxy Statement, if other than the Registrant) </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT
SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:2%; text-indent:-2%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Payment of Filing
Fee (Check the appropriate box): </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="3%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#9746;&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">No fee required. </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:-6px"><FONT SIZE="1">&nbsp;</FONT></P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="3%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#9744;&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11. </FONT></TD></TR></TABLE>
<P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1)&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title of each class of securities to which transaction applies: </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px">&nbsp;</P>
<P STYLE="margin-top:0px;margin-bottom:0px; margin-left:5%" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3">&nbsp;&nbsp;</FONT></P>
<P STYLE="line-height:0px;margin-top:0px;margin-bottom:2px;margin-left:1%;border-bottom:0.5pt solid #000000; width:99%">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2)&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Aggregate number of securities to which transaction applies: </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px">&nbsp;</P>
<P STYLE="margin-top:0px;margin-bottom:0px; margin-left:5%" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3">&nbsp;&nbsp;</FONT></P>
<P STYLE="line-height:0px;margin-top:0px;margin-bottom:2px;margin-left:1%;border-bottom:0.5pt solid #000000; width:99%">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">(3)&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and
state how it was determined): </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px">&nbsp;</P>
<P STYLE="margin-top:0px;margin-bottom:0px; margin-left:5%" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3">&nbsp;&nbsp;</FONT></P>
<P STYLE="line-height:0px;margin-top:0px;margin-bottom:2px;margin-left:1%;border-bottom:0.5pt solid #000000; width:99%">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">(4)&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Proposed maximum aggregate value of transaction: </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px">&nbsp;</P>
<P STYLE="margin-top:0px;margin-bottom:0px; margin-left:5%" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3">&nbsp;&nbsp;</FONT></P>
<P STYLE="line-height:0px;margin-top:0px;margin-bottom:2px;margin-left:1%;border-bottom:0.5pt solid #000000; width:99%">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">(5)&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total fee paid: </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px">&nbsp;</P>
<P STYLE="margin-top:0px;margin-bottom:0px; margin-left:5%" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3">&nbsp;&nbsp;</FONT></P>
<P STYLE="line-height:0px;margin-top:0px;margin-bottom:2px;margin-left:1%;border-bottom:0.5pt solid #000000; width:99%">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left"></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="3%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#9744;&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Fee paid previously with preliminary materials. </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="3%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#9744;&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously.
Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing. </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1)&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Amount Previously Paid: </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px">&nbsp;</P>
<P STYLE="margin-top:0px;margin-bottom:0px; margin-left:5%" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3">&nbsp;&nbsp;</FONT></P>
<P STYLE="line-height:0px;margin-top:0px;margin-bottom:2px;margin-left:1%;border-bottom:0.5pt solid #000000; width:99%">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2)&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Form, Schedule or Registration Statement No.: </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px">&nbsp;</P>
<P STYLE="margin-top:0px;margin-bottom:0px; margin-left:5%" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3">&nbsp;&nbsp;</FONT></P>
<P STYLE="line-height:0px;margin-top:0px;margin-bottom:2px;margin-left:1%;border-bottom:0.5pt solid #000000; width:99%">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">(3)&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Filing Party: </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px">&nbsp;</P>
<P STYLE="margin-top:0px;margin-bottom:0px; margin-left:5%" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3">&nbsp;&nbsp;</FONT></P>
<P STYLE="line-height:0px;margin-top:0px;margin-bottom:2px;margin-left:1%;border-bottom:0.5pt solid #000000; width:99%">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">(4)&nbsp;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Date Filed: </FONT></TD></TR></TABLE> <P STYLE="margin-top:0px;margin-bottom:0px">&nbsp;</P> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:5%" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="3">&nbsp;&nbsp;</FONT></P> <P STYLE="line-height:0px;margin-top:0px;margin-bottom:2px;margin-left:1%;border-bottom:0.5pt solid #000000; width:99%">&nbsp;</P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT
SIZE="1">&nbsp;</FONT></P>

<p style="margin-top:1em; margin-bottom:0em; page-break-before:always">
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">


<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>ADDITIONAL INFORMATION REGARDING THE ANNUAL MEETING OF STOCKHOLDERS TO BE HELD ON TUESDAY, MAY&nbsp;12,
2020 </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Arthur J. Gallagher&nbsp;&amp; Co. issued the following press release on May&nbsp;1, 2020, which relates to its proxy statement filed on
March&nbsp;23, 2020 (&#147;Proxy Statement&#148;), and furnished to its stockholders in connection with the solicitation of proxies for use at the Annual Meeting of Stockholders to be held on Tuesday, May&nbsp;12, 2020. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Except as specifically revised by the information contained herein, the information in the Proxy Statement continues to apply and should be considered in
voting shares. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">This press release should be read in conjunction with Arthur J. Gallagher&nbsp;&amp; Co.&#146;s Proxy Statement. </P>
</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always">
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">


<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt;margin-bottom:0pt">


<IMG SRC="g873224g0501090943305.jpg" ALT="LOGO">
 </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>NEWS RELEASE </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>ARTHUR J. GALLAGHER&nbsp;&amp; CO. ANNOUNCES ANNUAL MEETING OF </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>STOCKHOLDERS WILL BE VIRTUAL ONLY </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Rolling
Meadows, IL, May&nbsp;1, 2020 &#151; Arthur J. Gallagher&nbsp;&amp; Co.&nbsp;(NYSE: AJG) announced today that its 2020 Annual Meeting of Stockholders has been changed to a virtual meeting in light of public health concerns regarding the <FONT
STYLE="white-space:nowrap">COVID-19</FONT> pandemic. Stockholders will not be able to attend the Annual Meeting in person this year. As previously announced, the Annual Meeting will be held on May&nbsp;12, 2020 at 9:00 a.m., CDT. The items of
business are the same as previously announced. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Stockholders of record at the close of business on March&nbsp;20, 2020, are entitled to participate in the
Annual Meeting, as described in the proxy materials previously distributed. Stockholders may vote shares by visiting&nbsp;<U>www.proxyvote.com</U>. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">On
the day of the Annual Meeting, stockholders must visit&nbsp;<U>www.virtualshareholdermeeting.com/AJG2020</U>&nbsp;to attend and participate in the virtual Annual Meeting, including to vote and submit questions during the meeting. Stockholders will
need the <FONT STYLE="white-space:nowrap">16-digit</FONT> control number found on their proxy card, voting instruction form or Notice of Internet Availability of Proxy Materials they previously received to submit questions, vote or examine the
stockholder list at the virtual Annual Meeting. Stockholders are encouraged to log in to the Annual Meeting website before the Annual Meeting begins. Online <FONT STYLE="white-space:nowrap">check-in</FONT> will be available approximately
10&nbsp;minutes before the meeting starts. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Stockholders are encouraged to vote and submit their proxies in advance using one of the methods described in
the proxy materials for the Annual Meeting. Stockholders who have sent proxies or voted do not need to take further action. The proxy card or voting instruction form included with the proxy materials previously distributed will not be updated to
reflect the change in location and may continue to be used to vote shares in connection with the Annual Meeting.</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">An electronic list of the stockholders of
record as of the record date will be available for examination by stockholders at the Annual Meeting website during the meeting. For information on how to access the stockholder list from May&nbsp;2, 2020 until the meeting, please contact our VP
&#150; Investor Relations (see contact information below). </P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Additional information regarding the rules and procedures for participating in the virtual Annual Meeting
will be set forth in our meeting rules of conduct, which stockholders can view during the meeting at the Annual Meeting website. The proxy statement and Annual Report are available on our Investor Relations website at <U>www.ajg.com/ir</U>. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Arthur J. Gallagher&nbsp;&amp; Co. (NYSE: AJG), a global insurance brokerage, risk management and consulting services firm, is headquartered in Rolling
Meadows, Illinois. The company has operations in 49 countries and offers client service capabilities in more than 150 countries around the world through a network of correspondent brokers and consultants. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Contact: </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Ray Iardella&nbsp;&nbsp;&nbsp;&nbsp; </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">VP &#150; Investor Relations </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><FONT STYLE="white-space:nowrap"><FONT
STYLE="white-space:nowrap">630-285-3661/</FONT></FONT><U>ray_iardella@ajg.com</U> </P> <P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B># # # # </B></P>
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