<SEC-DOCUMENT>0001193125-20-208375.txt : 20200804
<SEC-HEADER>0001193125-20-208375.hdr.sgml : 20200804
<ACCEPTANCE-DATETIME>20200803183559
ACCESSION NUMBER:		0001193125-20-208375
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20200804
DATE AS OF CHANGE:		20200803
EFFECTIVENESS DATE:		20200804

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Aon plc
		CENTRAL INDEX KEY:			0000315293
		STANDARD INDUSTRIAL CLASSIFICATION:	INSURANCE AGENTS BROKERS & SERVICES [6411]
		IRS NUMBER:				363051915
		STATE OF INCORPORATION:			X0
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07933
		FILM NUMBER:		201070543

	BUSINESS ADDRESS:	
		STREET 1:		THE LEADENHALL BUILDING
		STREET 2:		122 LEADENHALL STREET
		CITY:			LONDON
		STATE:			X0
		ZIP:			EC3V 4AN
		BUSINESS PHONE:		(44) 20 7623 5500

	MAIL ADDRESS:	
		STREET 1:		THE LEADENHALL BUILDING
		STREET 2:		122 LEADENHALL STREET
		CITY:			LONDON
		STATE:			X0
		ZIP:			EC3V 4AN

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AON CORP
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COMBINED INTERNATIONAL CORP
		DATE OF NAME CHANGE:	19870504
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d239345ddefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
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<TITLE>DEFA14A</TITLE>
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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>UNITED STATES </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>SECURITIES AND EXCHANGE COMMISSION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Washington, D.C. 20549 </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>SCHEDULE 14A
</B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>(Rule 14a-101) </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>INFORMATION
REQUIRED IN PROXY STATEMENT </B></P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>SCHEDULE 14A INFORMATION </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Proxy Statement Pursuant to Section 14(a) of the </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Securities Exchange Act of 1934 </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center>
<P STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Filed by the
Registrant&nbsp;&nbsp;&#9746;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Filed by a party other than the
Registrant&nbsp;&nbsp;&#9744;</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Check the appropriate box: </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD VALIGN="top">&#9744;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Preliminary Proxy Statement</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">&#9744;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"><B>Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))</B></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
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<TD VALIGN="top">&#9744;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Definitive Proxy Statement</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">&#9746;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Definitive Additional Materials</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
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<TD VALIGN="top">&#9744;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">Soliciting Material under &#167;240.14a-12</TD></TR></TABLE> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:22pt; font-family:Times New Roman" ALIGN="center"><B>Aon plc </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(Name of Registrant as Specified in its Charter) </B></P> <P STYLE="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant) </B></P>
<P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Payment of Filing Fee (Check the appropriate box): </P>
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<TD HEIGHT="16" COLSPAN="4"></TD></TR>

<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">&#9746;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="3">No fee required.</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">&#9744;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="3">Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.</TD></TR>
<TR STYLE="font-size:1pt">
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<TD HEIGHT="16" COLSPAN="2"></TD>
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<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">(1)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Title of each class of securities to which transaction applies:</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">(2)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Aggregate number of securities to which transaction applies:</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">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):</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">(4)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Proposed maximum aggregate value of transaction:</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">(5)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Total fee paid:</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P></TD></TR>
<TR STYLE="font-size:1pt">
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<TD HEIGHT="24" COLSPAN="4"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">&#9744;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="3">Fee paid previously with preliminary materials.</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="24"></TD>
<TD HEIGHT="24" COLSPAN="4"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top">&#9744;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top" COLSPAN="3">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:</TD></TR>
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<TD HEIGHT="24"></TD>
<TD HEIGHT="24" COLSPAN="2"></TD>
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<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">(1)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Amount Previously Paid:</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">(2)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Form, Schedule or Registration Statement No.:</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">(3)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Filing party:</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">(4)</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Date Filed:</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P></TD></TR>
</TABLE> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;</P>
<P STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">As of the date of this proxy supplement, five complaints have been filed seeking to enjoin
the transaction and other relief. On May&nbsp;11, 2020, a purported shareholder of Willis Towers Watson plc (&#147;WTW&#148;) filed a complaint in the United States District Court for the Southern District of New York against WTW and the board of
directors of WTW, referred to as the &#147;WTW Board,&#148; captioned <I>Stein v. Willis Towers Watson Public Limited Company, et al.</I>, Case No. <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">1:20-cv-03656</FONT></FONT>
(S.D.N.Y.), referred to as the &#147;Stein Complaint&#148;. On May&nbsp;14, 2020, a purported shareholder of WTW filed a putative class action in the United States District Court for the District of Delaware against WTW, the WTW Board and Aon plc
(&#147;Aon&#148;), captioned <I>Kent v. Willis Towers Watson Public Limited Company, et al.</I>, Case No. <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">1:20-cv-00641</FONT></FONT> (D. Del.), referred to as the &#147;Kent
Complaint&#148;. On May&nbsp;19, 2020, a purported shareholder of WTW filed a putative class action in the United States District Court for the Southern District of New York against WTW and the WTW Board, captioned <I>Carter v. Willis Towers Watson
Public Limited Company, et al.</I>, Case No. <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">1:20-cv-03865</FONT></FONT> (S.D.N.Y.), referred to as the &#147;Carter Complaint&#148;. On May&nbsp;28, 2020, a purported shareholder of
WTW filed a complaint in the United States District Court for the Southern District of California against WTW and the WTW Board, captioned <I>Tang v. Willis Towers Watson Public Limited Company, et al.</I>, Case No. <FONT STYLE="white-space:nowrap"><FONT
STYLE="white-space:nowrap">3:20-cv-00986</FONT></FONT> (S.D. Cal.), referred to as the &#147;Tang Complaint.&#148; On June&nbsp;17, 2020, a purported shareholder of WTW filed a complaint in the United States District Court for the Southern District
of California against WTW and the WTW Board, captioned <I>Kuznik</I><I> v. Willis Towers Watson Public Limited Company, et al.</I>, Case No. <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">3:20-cv-01097</FONT></FONT> (S.D. Cal.),
referred to as the &#147;Kuznik Complaint,&#148; and together with the Stein Complaint, the Kent Complaint, the Carter Complaint and the Tang Complaint, referred to as the &#147;Complaints.&#148; </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">The Complaints assert claims against certain defendants under Section&nbsp;14(a) of the Exchange Act for allegedly false and misleading
statements in the Definitive Proxy Statement; and against certain defendants under Section&nbsp;20(a) of the Exchange Act for alleged &#147;control person&#148; liability with respect to such allegedly false and misleading statements. Each Complaint
seeks, among other relief, an order enjoining the transaction. The Stein Complaint and the Carter Complaint also seek damages in an unspecified amount. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">WTW and Aon believe the allegations in the Complaints are without merit and that no supplemental disclosure is required under applicable laws.
However, in order to reduce the risk of the Complaints delaying or adversely affecting the transaction and to minimize the costs, risks and uncertainties inherent in litigation, and without admitting any liability or wrongdoing, WTW and Aon have
determined to voluntarily supplement the Definitive Proxy Statement by providing the additional information presented below in this proxy supplement. Nothing in this proxy supplement shall be deemed an admission of the legal necessity or materiality
under applicable laws of any of the disclosures set forth herein. To the contrary, WTW and Aon specifically deny all allegations in the Complaints that any additional disclosure was or is required. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">This proxy supplement will not affect the scheme consideration to be received by shareholders of WTW in connection with the transaction or the
timing of the special meeting of shareholders ordered by the High Court of Ireland, referred to as the &#147;WTW Court Meeting,&#148; scheduled for August&nbsp;26, 2020 at 10:30 a.m., EDT, and the extraordinary general meeting of shareholders,
referred to as the &#147;WTW EGM,&#148; scheduled for August&nbsp;26, 2020 at 11:00 a.m., both at 1450 Brickell Avenue, Suite 1600, Miami, Florida, United States and Matheson, 70 Sir John Rogerson&#146;s quay, Dublin 2, Ireland. <B>WTW&#146;s board
of directors continues to unanimously recommend that WTW&#146;s shareholders vote &#147;FOR&#148; all proposals being presented at the shareholder meetings.</B> </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">This proxy supplement will not affect the timing of the extraordinary general meeting of shareholders of Aon, referred to as the &#147;Aon
EGM,&#148; scheduled for August&nbsp;26, 2020 at 11:00 a.m., EDT, at 200 East Randolph Street, Chicago, Illinois 60601, United States and Ten Earlsfort Terrace, Dublin 2, D02 T380, Ireland. <B>Aon&#146;s board of directors continues to unanimously
recommend that Aon&#146;s shareholders vote &#147;FOR&#148; all proposals being presented at the shareholder meeting.</B> </P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Supplemental Disclosures to Definitive Proxy Statement in </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Connection with the Complaints </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">The additional disclosures, referred to as the &#147;Supplemental Disclosures,&#148; in this proxy supplement amend and supplement the
disclosures contained in the definitive joint proxy statement filed by WTW and Aon on July 8, 2020 (the &#147;Definitive Proxy Statement&#148;) and should be read in conjunction with the disclosures contained in the Definitive Proxy Statement, which
in turn should be read in its entirety. To the extent that information set forth in the Supplemental Disclosures differs from or updates information contained in the Definitive Proxy Statement, the information in this proxy supplement shall
supersede or supplement the applicable information contained in the Definitive Proxy Statement. All page references are to the Definitive Proxy Statement, and capitalized terms used but not otherwise defined herein shall have the meanings ascribed
to such terms in the Definitive Proxy Statement. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>1.&nbsp;&nbsp;&nbsp;&nbsp;The disclosure in the second full paragraph on page 77 of the Definitive
Proxy Statement is hereby amended and restated as follows (with the new text in underline): </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">During its March&nbsp;6, 2020 meeting,
the WTW Board also discussed with representatives of WTW management and its advisors the strategic rationale for the proposed transaction, as well as the risks and feasibility of the alternatives. <U>The WTW Board also reviewed Goldman Sachs&#146;
relationship disclosures and concluded that nothing in such disclosures would prevent Goldman Sachs from representing WTW as a financial advisor.</U> Representatives of Skadden then reviewed with the WTW Board the potential terms of the Goldman
Sachs engagement letter, including the financial terms thereof. Representatives of Goldman Sachs then joined the meeting and reviewed for the WTW Board Goldman Sachs&#146; financial analyses of the potential transaction as of such date. Following
these discussions, the WTW Board directed WTW management and the representatives of its advisors to continue working towards finalizing documentation. The WTW Board also asked Messrs. Ganzi and Haley to convey to Mr.&nbsp;Case that Aon&#146;s most
recent proposals on the allocation of antitrust risk were inadequate, and that deal certainty was critically important to WTW, and to make a counterproposal to Mr.&nbsp;Case centered around a higher quantitative size of potential remedies that would
be required to be accepted by Aon, joint strategic control over the antitrust and regulatory approval process and a significant antitrust and competition termination fee. The WTW Board also instructed WTW&#146;s legal advisors to send to Aon&#146;s
legal advisors revised documentation reflecting the same. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>2.&nbsp;&nbsp;&nbsp;&nbsp;The disclosure in the final bullet on page 97 of the Definitive
Proxy Statement is hereby amended and restated as follows (with the new text in underline): </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="4%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">the WTW Standalone Projections, which are summarized in the section entitled &#147;<I>The Transaction&#151;Aon
and WTW Forward-Looking Financial Information&#151;WTW Forward-Looking Financial Information</I>&#148; beginning on page 107 of this joint proxy statement and which include certain internal financial analyses and forecasts for WTW on a standalone
basis prepared by its management, and the Aon Standalone Projections, which are summarized in the section entitled &#147;<I>The Transaction&#151;Aon and WTW Forward-Looking Financial Information&#151;Aon Forward-Looking Financial
Information</I>&#148; beginning on page 106 of this joint proxy statement for Aon on a standalone basis prepared by its management, and certain pro forma unaudited prospective financial information, which is described in the section entitled
<I>&#147;The Transaction&#151;Aon and WTW Forward-Looking Financial Information&#151;WTW Forward-Looking Financial Information&#148;</I> beginning on page 107 of this joint proxy statement, in each case, as approved for Goldman Sachs&#146; use by
WTW management, referred to as the &#147;<U>WTW Management</U> Projections,&#148; including the Estimated Synergies. For more information on the Estimated Synergies, see the Combination Benefit Statement, a copy of which is attached as Annex G to
this joint proxy statement and which includes certain operating synergies projected by Aon management to result from the transaction, as approved for Goldman Sachs&#146; use by WTW management. </P></TD></TR></TABLE>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>3.&nbsp;&nbsp;&nbsp;&nbsp;The disclosure in the first full paragraph on page 98 of the Definitive Proxy Statement is hereby amended and restated as follows
(with the new text in underline): </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">For purposes of rendering its opinion, Goldman Sachs, with WTW&#146;s consent, relied upon and
assumed the accuracy and completeness of all of the financial, legal, regulatory, tax, accounting and other information provided to, discussed with or reviewed by it, without assuming any responsibility for independent verification thereof. In that
regard, Goldman Sachs assumed with WTW&#146;s consent that the <U>WTW Management</U> Projections, including the Estimated Synergies, were reasonably prepared on a basis reflecting the best currently available estimates and judgments of WTW
management. Goldman Sachs did not make an independent evaluation or appraisal of the assets and liabilities (including any contingent, derivative or other <FONT STYLE="white-space:nowrap">off-balance-sheet</FONT> assets and liabilities) of Aon or
WTW or any of their respective subsidiaries and it was not furnished with any such evaluation or appraisal. Goldman Sachs is not an actuarial firm and its services did not include any actuarial determination or evaluation or any attempt to evaluate
actuarial assumptions, and Goldman Sachs relied on WTW&#146;s actuaries with respect to reserve adequacy. Goldman Sachs assumed that all governmental, regulatory or other consents and approvals necessary for the consummation of the transaction will
be obtained without any adverse effect on Aon or WTW or on the expected benefits of the transaction in any way meaningful to Goldman Sachs&#146; analysis. </P>
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<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Goldman Sachs also assumed that the transaction will be consummated on the terms set forth in the Business
Combination Agreement, without the waiver or modification of any term or condition the effect of which would be in any way meaningful to its analysis. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>4.&nbsp;&nbsp;&nbsp;&nbsp;The section of the Definitive Proxy Statement entitled &#147;</B><B><I>The Transaction&#151;Opinion of Goldman
Sachs&#151;Illustrative Present Value of Future Share Price Analysis</I></B><B>&#148; beginning on page 99 is hereby amended and restated as follows (with the new text in underline and the stricken language removed): </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Goldman Sachs performed an illustrative analysis of the implied present value of the future share price of WTW on a standalone basis, which is
designed to provide an indication of the present value of a theoretical future value of a company&#146;s equity as a function of such company&#146;s estimated future financial multiples and the dividends per share forecasted to be paid through each
year. For this analysis, Goldman Sachs used the <U>WTW Standalone</U> Projections for each of the fiscal years 2020 to 2023. Goldman Sachs first calculated the implied standalone values per WTW Share as of March&nbsp;6, 2020 for each of the fiscal
years 2020 to 2022, by applying price to next 12 months, referred to as &#147;NTM,&#148; estimated cash earnings per share multiples of 15.5x to 17.5x to estimates of NTM <U>adjusted</U> earnings per ordinary share for the years 2020 to 2022. These
illustrative multiple estimates were derived by Goldman Sachs utilizing its professional judgment and experience, taking into account current and historical trading data and the current Cash P/E multiples for WTW. Goldman Sachs then discounted such
amounts to present value as of March&nbsp;6, 2020, using an illustrative discount rate of 5.7%, reflecting an estimate of WTW&#146;s cost of equity. Goldman Sachs then added to such amounts the cumulative present value (as of March&nbsp;6, 2020) of
future dividends per WTW Share <STRIKE>projected by the</STRIKE><STRIKE></STRIKE><U>included in the WTW Standalone</U> Projections to be paid over such period using the same discount rate. Goldman Sachs derived such discount rate by application of
the Capital Asset Pricing Model, which requires certain company-specific inputs, including a beta for the company, as well as certain financial metrics for the U.S. financial markets generally. This analysis resulted in a range of implied present
values per WTW Share of $197.17 to $244.78, corresponding to implied exchange ratios of 0.92x to 1.14x, respectively. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Goldman Sachs also
performed an illustrative analysis of the implied present value of the scheme consideration per WTW Share based on the theoretical future prices per ordinary share of the combined company and the dividends per share forecasted to be paid through
each year. For this analysis, Goldman Sachs used the <U>WTW Management</U> Projections, including the Estimated Synergies, on a NTM basis for each of the fiscal years 2020 to 2023. Goldman Sachs first calculated the implied values per ordinary share
of the combined company for each of the fiscal years 2020 to 2022, by applying price to NTM estimated cash earnings per share multiples of 16.4x to 20.3x to estimates of earnings per ordinary share of the combined company<STRIKE>and estimates of
dividends per Aon Share, reflecting the dividends per share of the combined company on a NTM basis for each of the fiscal years 2020 to 2022</STRIKE>. These illustrative multiple estimates were derived by Goldman Sachs utilizing its professional
judgment and experience, taking into account current and historical trading data and the current Cash P/E multiples for Aon and WTW. Goldman Sachs then discounted such amounts to present value as of March&nbsp;6, 2020, using an illustrative discount
rate of 5.7%, reflecting an estimate of the cost of equity for the pro forma company based on WTW&#146;s cost of equity and Aon&#146;s cost of equity. Goldman Sachs then added to such amounts the cumulative present value (as of March&nbsp;6, 2020)
of future dividends per Aon Share projected by median IBES estimates to be paid <STRIKE></STRIKE><U></U><STRIKE>over such period</STRIKE><U>for each of the fiscal years 2020 to 2022, as applicable</U>, using the same discount rate. Goldman Sachs
derived such discount rate by application of the Capital Asset Pricing Model, which requires certain company-specific inputs, including a beta for the company, as well as certain financial metrics for the U.S. financial markets generally. Goldman
Sachs then multiplied these amounts by the exchange ratio of 1.08x, representing the number of Aon Shares to be received per WTW Share by WTW shareholders pursuant to the Business Combination Agreement. This analysis resulted in a range of implied
present values of the scheme consideration per WTW Share of $210.49 to $309.89. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>5.&nbsp;&nbsp;&nbsp;&nbsp;The section of the Definitive Proxy
Statement entitled &#147;</B><B><I>The Transaction&#151;Opinion of Goldman Sachs&#151;Illustrative Discounted Cash Flow Analysis</I></B><B>&#148; beginning on page 100 is hereby amended and restated as follows (with the new text in underline and the
stricken language removed): </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Using the <U>WTW Management</U> Projections, Goldman Sachs performed an illustrative discounted cash flow
analysis on WTW. Using discount rates ranging from 5.5% to 6.5%, reflecting estimates of WTW&#146;s weighted average cost of capital, Goldman Sachs discounted to present value as of December&nbsp;31, 2019 (i) estimates of unlevered free cash flow
for WTW for each of the fiscal years 2020 through 2024 as reflected in the <U>WTW Management</U> Projections and (ii)&nbsp;a range of illustrative terminal values for WTW, which were calculated by applying an enterprise value multiple (EV / Adjusted
EBITDA) range of 11.0x to 13.0x to fiscal year 2025 Adjusted EBITDA, which estimated terminal year Adjusted EBITDA was reflected in the <U>WTW Management</U> Projections. Goldman Sachs derived the range of discount rates by application of the
Capital Asset Pricing Model, which requires certain company-specific inputs, including the company&#146;s target capital structure weightings, the cost of long-term debt, <FONT STYLE="white-space:nowrap">after-tax</FONT> yield on permanent excess
cash, if any, future applicable marginal cash tax rate and a beta for the company, as well as certain financial metrics for the U.S. financial markets generally. The EV / Adjusted EBITDA exit multiple range for WTW was derived by Goldman Sachs
utilizing its professional judgment and experience, taking into account the publicly observed NTM EV / Adjusted EBITDA multiples for selected public companies based on the &#147;Selected Companies Analysis&#148; below. Goldman Sachs derived ranges
of illustrative enterprise values for WTW by adding the ranges of present values it derived above. Goldman Sachs then subtracted the Net Debt, representing the balances of financial debt, less cash and cash equivalents and <FONT
STYLE="white-space:nowrap">after-tax</FONT> balances of unfunded pension plan and other post-employment </P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">
benefit plan liabilities and <FONT STYLE="white-space:nowrap">non-controlling</FONT> interest value, each as reflected in WTW&#146;s Annual Report on Form
<FONT STYLE="white-space:nowrap">10-K</FONT> for the year ended December&nbsp;31, 2019, from the range of illustrative enterprise values it derived for WTW to derive a range of illustrative equity values for WTW. Goldman Sachs then divided the range
of illustrative equity values it derived by the number of fully diluted outstanding shares of WTW, as provided by WTW management, to derive a range of illustrative present values per share ranging from $228.09 to $282.06, corresponding to implied
exchange ratios of 1.06x to 1.31x, respectively. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Using the <U>WTW Management</U> Projections, Goldman Sachs performed an illustrative
discounted cash flow analysis on Aon. Using discount rates ranging from 5.5% to 6.5%, reflecting estimates of Aon&#146;s weighted average cost of capital, Goldman Sachs discounted to present value as of December&nbsp;31, 2019 (i) estimates of
unlevered free cash flow for Aon for each of the fiscal years 2020 through 2024 as reflected in the <U>WTW Management</U> Projections and (ii)&nbsp;a range of illustrative terminal values for Aon, which were calculated by applying an enterprise
value multiple (EV / Adjusted EBITDA) range of 15.5x to 17.0x to fiscal year 2025 Adjusted EBITDA, which estimated terminal year Adjusted EBITDA was reflected in the <U>WTW Management</U> Projections. Goldman Sachs derived the range of discount
rates by application of the Capital Asset Pricing Model, which requires certain company-specific inputs, including the company&#146;s target capital structure weightings, the cost of long-term debt, <FONT STYLE="white-space:nowrap">after-tax</FONT>
yield on permanent excess cash, if any, future applicable marginal cash tax rate and a beta for the company, as well as certain financial metrics for the U.S. financial markets generally. The EV / Adjusted EBITDA exit multiple range for Aon was
derived by Goldman Sachs utilizing its professional judgment and experience, taking into account the NTM EV / Adjusted EBITDA multiples for selected public companies based on the &#147;Selected Companies Analysis&#148; below. Goldman Sachs derived
ranges of illustrative enterprise values for Aon by adding the ranges of present values it derived above. Goldman Sachs then subtracted the Net Debt balance and <FONT STYLE="white-space:nowrap">non-controlling</FONT> interest value, each as
reflected in Aon&#146;s Annual Report on Form <FONT STYLE="white-space:nowrap">10-K</FONT> for the year ended December&nbsp;31, 2019, from the range of illustrative enterprise values it derived for Aon, to derive a range of illustrative equity
values for Aon. Goldman Sachs then divided the range of illustrative equity values it derived <U></U><STRIKE>by the number of fully diluted outstanding shares of</STRIKE><U>based on the sum of the basic shares outstanding and dilutive securities,
the amount of which was determined based on the treasury stock method, for</U><U> </U>Aon <U>as of March&nbsp;5, 2020,</U><U> </U>as provided by Aon management <U>and approved for Goldman Sachs&#146; use by WTW management,</U> to derive a range of
illustrative present values per share ranging from $258.21 to $295.76. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>6.&nbsp;&nbsp;&nbsp;&nbsp;The section of the Definitive Proxy Statement
entitled &#147;</B><B><I>The Transaction&#151;Opinion of Goldman Sachs&#151;Pro Forma Discounted Cash Flow Analysis and Illustrative Present Value of Aon Shares to be Received by WTW Shareholders in the Business Combination
Agreement</I></B><B>&#148; on page 101 is hereby amended and restated as follows (with the new text in underline): </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Using the <U>WTW
Management</U> Projections, and taking into account the Estimated Synergies, Goldman Sachs performed an illustrative discounted cash flow analysis on Aon pro forma for the transaction to calculate the implied present value of the Aon Shares to be
issued per WTW Share pursuant to the Business Combination Agreement. Using discount rates ranging from 5.5% to 6.5%, reflecting estimates of Aon&#146;s pro forma cost of capital, assuming the transaction was consummated on December&nbsp;31, 2020,
Goldman Sachs discounted to present value as of December&nbsp;31, 2019 (i) estimates of unlevered free cash flow for Aon pro forma for each of the fiscal years 2020 through 2024 as reflected in the <U>WTW Management</U> Projections (taking into
account the Estimated Synergies) and (ii)&nbsp;a range of illustrative terminal values for Aon pro forma for the transaction, which were calculated by applying an enterprise value multiple range of 13.6x to 15.3x based on the weighted average of WTW
and Aon&#146;s range of terminal value EV / Adjusted EBITDA multiples to the estimate of fiscal year 2025 Adjusted EBITDA for Aon pro forma. Goldman Sachs derived ranges of illustrative enterprise values for Aon pro forma by adding the ranges of
present values it derived above. Goldman Sachs then subtracted the sum of the standalone Net Debt and <FONT STYLE="white-space:nowrap">non-controlling</FONT> interest balances for Aon and WTW <U>(each as reflected in Aon&#146;s Annual Report on Form
<FONT STYLE="white-space:nowrap">10-K</FONT> for the year ended December</U><U></U><U>&nbsp;31, 2019 or WTW&#146;s Annual Report on Form <FONT STYLE="white-space:nowrap">10-K</FONT> for the year ended December</U><U></U><U>&nbsp;31, 2019, as
applicable)</U> from the range of illustrative enterprise values it derived for Aon pro forma to derive a range of illustrative equity values for Aon pro forma. Goldman Sachs then divided the range of illustrative equity values it derived by the
number of fully diluted pro forma Aon Shares. Goldman Sachs then multiplied these amounts by the exchange ratio of 1.08x representing the number of Aon Shares to be received per WTW Share by WTW shareholders pursuant to the Business Combination
Agreement. This analysis resulted in a range of implied present values of the scheme consideration per WTW Share of $284.61 to $334.62. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>7.&nbsp;&nbsp;&nbsp;&nbsp;The section of the Definitive Proxy Statement entitled &#147;</B><B><I>The Transaction&#151;Opinion of Goldman Sachs&#151;Premia
Analysis</I></B><B>&#148; beginning on page 101 is hereby amended and restated as follows (with the new text in underline): </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Goldman
Sachs reviewed and analyzed the acquisition premia for<U> 14 transactions, which constitute all of the</U> <FONT STYLE="white-space:nowrap">all-stock</FONT> acquisition transactions announced during the time period from 2015 through 2019 involving a
North American public company as the target where the disclosed enterprise value for the transaction was above $5&nbsp;billion. For each year of the five-year period, using publicly available information, Goldman Sachs calculated the average of the
price paid in the transactions relative to the target&#146;s last undisturbed closing stock price prior to announcement of the transaction. The average premium per year was as follows: (i) 10.5% for 2015; (ii) 5.2% for 2016; (iii) 10.8% for 2017;
(iv) 18.3% for 2018; and (v) 25.6% for 2019. This analysis indicated a median premium of 11.6% for all transactions over the five-year period. This analysis also indicated an average premium of 16.4% for all transactions over the five-year period.
Using this analysis, Goldman Sachs applied a reference range of illustrative premiums of 15.0% to 25.0% to the closing price per WTW Share of $199.71 on March&nbsp;6, 2020 and calculated a range of implied equity values per WTW Share of $229.67 to
$249.64, corresponding to implied exchange ratios of 1.07x to 1.16x, respectively. </P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>8.&nbsp;&nbsp;&nbsp;&nbsp;The disclosure in the first paragraph of the section of the Definitive Proxy
Statement entitled &#147;</B><B><I>The Transaction&#151;Opinion of Goldman Sachs&#151;Illustrative Contribution Analysis</I></B><B>&#148; on page 102 is hereby amended and restated as follows (with the new text in underline): </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Goldman Sachs reviewed specific historical and estimated future operating and financial information including revenues, Adjusted EBITDA,
unlevered free cash flow, levered free cash flow, enterprise value, implied equity value from the <FONT STYLE="white-space:nowrap">mid-points</FONT> of the Discounted Cash Flow Analysis, market capitalization and number of employees for WTW, Aon and
the combined entity resulting from the transaction based on the <U>WTW Management</U> Projections. Using the <U>WTW Management</U> Projections, Goldman Sachs also analyzed the relative potential contribution of WTW to these financial metrics for the
combined company following consummation of the transaction, before taking into account any of the Estimated Synergies, and adjusting for WTW&#146;s and Aon&#146;s respective capital structures. The following table sets forth the results of this
analysis: </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>9.&nbsp;&nbsp;&nbsp;&nbsp;The first table, entitled &#147;Insurance Brokerage&#148;, in the section of the Definitive Proxy Statement
entitled &#147;</B><B><I>The Transaction&#151;Opinion of Goldman Sachs&#151;Selected Transactions Analysis</I></B><B>&#148; on page 102 is hereby amended and restated as follows (with the new column in grey): </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="84%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>

<TD WIDTH="19%"></TD>

<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>

<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>

<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="bottom" NOWRAP> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; border-bottom:1.00pt solid #000000; display:table-cell; font-size:8pt; font-family:Times New Roman; ">Date</P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000">Target</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000">Acquiror</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000">EV/LTM&nbsp;Adj.&nbsp;EBITDA</TD></TR>


<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">September&nbsp;2018</P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Jardine&nbsp;Lloyd&nbsp;Thompson&nbsp;Group&nbsp;plc</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Marsh&nbsp;&amp;&nbsp;McLennan&nbsp;Companies,&nbsp;Inc.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">15.7x</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">October&nbsp;2018</P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Hays Companies</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Brown&nbsp;&amp; Brown, Inc.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">14.6x</TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>10.&nbsp;&nbsp;&nbsp;&nbsp;The second table, entitled &#147;Business Services and Benefits Administration&#148;, in the
section of the Definitive Proxy Statement entitled &#147;</B><B><I>The Transaction&#151;Opinion of Goldman Sachs&#151;Selected Transactions Analysis</I></B><B>&#148; on page 102 is hereby amended and restated as follows (with the new column in
grey): </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="84%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>

<TD WIDTH="14%"></TD>

<TD VALIGN="bottom" WIDTH="6%"></TD>
<TD></TD>

<TD VALIGN="bottom" WIDTH="6%"></TD>
<TD></TD>

<TD VALIGN="bottom" WIDTH="6%"></TD>
<TD></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="bottom" NOWRAP> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; border-bottom:1.00pt solid #000000; display:table-cell; font-size:8pt; font-family:Times New Roman; ">Date</P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000">Target</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000">Acquiror</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000">EV/LTM&nbsp;Adj.&nbsp;EBITDA</TD></TR>


<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">January&nbsp;2017</P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">CEB Inc.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Gartner, Inc.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">13.5x</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">August&nbsp;2017</P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">EAB&nbsp;Global,&nbsp;Inc.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">Vista&nbsp;Equity&nbsp;Partners&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">14.0x</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">August&nbsp;2017</P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">The&nbsp;Advisory&nbsp;Board&nbsp;Company&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">OptumInsight, Inc.</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">14.0x</TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>11.&nbsp;&nbsp;&nbsp;&nbsp;The disclosure in the second paragraph on page 105 of the Definitive Proxy Statement is hereby
amended and restated as follows (with the new text in underline and the stricken language removed): </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Neither Aon nor WTW as a matter
of course makes public projections as to future performance, revenues, earnings or other results of operations beyond, in the case of WTW, certain metrics for the current fiscal year due to, among other reasons, the uncertainty, unpredictability and
subjectivity of the applicable underlying assumptions and estimates. Aon and WTW do not disclose projections for extended periods due to the increasing uncertainty, unpredictability and subjectivity of such assumptions and estimates when applied to
time periods further in the future. As a result, Aon and WTW do not endorse the forward-looking financial information described below as a reliable indication of future results. However, for internal purposes and in connection with evaluating the
transaction, Aon management <STRIKE></STRIKE><STRIKE>and WTW management</STRIKE>prepared <STRIKE></STRIKE><U></U><STRIKE>certain forward-looking financial information</STRIKE><U>the Aon Standalone Projections and the Aon Projections for WTW</U>,
referred to as the &#147;Aon Projections<U>,</U>&#148; and <U>WTW management prepared</U> the <STRIKE></STRIKE>WTW Standalone Projections,<STRIKE>&#148; respectively, and </STRIKE>together <U>with the Aon Projections, referred to as</U> the
&#147;Projections<STRIKE></STRIKE><U>.</U><STRIKE>, which was</STRIKE>&#148; <U>The Aon Projections and the WTW Standalone Projections were</U> made available to the Aon Board<STRIKE> and the WTW Board</STRIKE><U>,</U> in connection with
<U></U><STRIKE>their</STRIKE><U>its</U> consideration and evaluation of the transaction<U>,</U> and to <U></U><STRIKE>their respective</STRIKE><U>its</U> financial<STRIKE> advisors </STRIKE><U>advisor</U>, Credit
Suisse<STRIKE></STRIKE><U></U><STRIKE>and</STRIKE><U>, in connection with its financial analyses and opinion. The WTW Standalone Projections and the Aon Standalone Projections were made available to the WTW Board, in connection with
</U><STRIKE>their</STRIKE><U>its consideration and evaluation of the transaction, and to its financial advisor,</U> Goldman Sachs, in connection with <STRIKE></STRIKE><U>its</U> <STRIKE>their</STRIKE>financial analyses and opinion<STRIKE>, and
as</STRIKE><U>.</U> <U>As</U> a result, <U>such Projections</U> are included in this joint proxy statement. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>12.&nbsp;&nbsp;&nbsp;&nbsp;The first
footnote to the second table in the section of the Definitive Proxy Statement entitled &#147;</B><B><I>The Transaction&#151;Aon and WTW Forward-Looking Financial Information&#151;Aon Forward-Looking Financial Information</I></B><B>&#148; on page 107
is hereby amended and restated as follows (with the new text in underline): </B></P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(1)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">Adjusted EBITDA means Aon&#146;s earnings before interest, taxes, depreciation and amortization, adjusted to
exclude, as applicable, certain <FONT STYLE="white-space:nowrap">non-recurring</FONT> items and <FONT STYLE="white-space:nowrap">non-cash</FONT> pension income. <U>Stock based compensation is treated as an expense for purposes of Adjusted
EBITDA.</U> </P></TD></TR></TABLE>
</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; font-size:10pt; font-family:Times New Roman"><B>13.&nbsp;&nbsp;&nbsp;&nbsp;The table and the accompanying footnotes in the section of the Definitive
Proxy Statement entitled &#147;</B><B><I>The Transaction&#151;Aon and WTW Forward-Looking Financial Information&#151;</I></B><B> </B><B><I>WTW Forward-Looking Financial Information</I></B><B>&#148; on page 108 is hereby amended and restated as
follows (with the new text in underline and new rows in grey): </B></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


<TR>

<TD WIDTH="71%"></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>

<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="18" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"><B>Fiscal&nbsp;Year&nbsp;Ending&nbsp;December&nbsp;31,</B></TD>
<TD VALIGN="bottom">&nbsp;</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<TD VALIGN="bottom"><B></B><I>($</I><B></B><I></I><B></B><I>&nbsp;in</I><B></B><I></I><B></B><I>&nbsp;millions,</I><B></B><I></I><B></B><I>&nbsp;except</I><B></B><I></I><B></B><I>&nbsp;per</I><B></B><I></I><B></B><I>&nbsp;
share</I><B></B><I></I><B></B><I>&nbsp;data)</I><B></B></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"><B>2020E</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"><B>2021E</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"><B>2022E</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"><B>2023E</B></TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1.00pt solid #000000"><B>2024E</B></TD>
<TD VALIGN="bottom">&nbsp;</TD></TR>


<TR BGCOLOR="#cceeff" STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Revenue</P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">9,594</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">10,074</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">10,577</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">11,106</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">11,662</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Adjusted EBITDA<SUP STYLE="font-size:85%; vertical-align:top">(1)(2)</SUP></P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">2,484</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">2,669</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">2,872</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">3,089</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">3,319</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff" STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Adjusted Net Income<SUP STYLE="font-size:85%; vertical-align:top">(3)</SUP></P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,554</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,698</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,847</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">2,006</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">2,176</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Unlevered Free Cash Flow<SUP STYLE="font-size:85%; vertical-align:top">(4)</SUP></P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,258</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,490</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,610</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,738</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,874</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff" STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Levered Free Cash Flow<SUP STYLE="font-size:85%; vertical-align:top">(5)</SUP></P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,062</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,293</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,413</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,541</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">1,678</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Adjusted Earnings Per Share<SUP STYLE="font-size:85%; vertical-align:top">(6)</SUP></P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">11.83</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">13.13</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">14.42</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">15.79</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">17.25</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff" STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Cash dividends declared per common share</P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">2.80</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">3.04</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">$</TD>
<TD VALIGN="bottom" ALIGN="right">3.28</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">Average number of diluted shares outstanding (millions)</P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="right">130.3</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="right">129.3</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="right">128.1</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="right">127.1</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom" ALIGN="right">126.1</TD>
<TD NOWRAP VALIGN="bottom">&nbsp;</TD></TR>
</TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Source: WTW management. </P>
<P STYLE="line-height:8.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000;width:11%">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(1)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">Adjusted EBITDA is defined as net income adjusted for provision for income taxes, interest expense,
depreciation and amortization, restructuring costs, transaction and integration expenses, (gain)/loss on disposal of operations and <FONT STYLE="white-space:nowrap">non-recurring</FONT> items that, in the judgement of WTW management, significantly
affect the period-over-period assessment of operating results. <U>WTW management did not provide to the WTW Board or Goldman Sachs projections for the line item components to calculate Adjusted EBITDA because such information was not material to
their analysis.</U> </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(2)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">WTW management also prepared a projection of Adjusted EBITDA for the fiscal year ended December&nbsp;31, 2025
of $3,564, and provided the same to Goldman Sachs for purposes of its financial analyses. </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(3)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">Adjusted Net Income is defined as net income attributable to WTW adjusted for amortization, restructuring
costs, transaction and integration expenses, (gain)/loss on disposal of operations and <FONT STYLE="white-space:nowrap">non-recurring</FONT> items that, in WTW management&#146;s judgment, significantly affect the period-over-period assessment of
operating results, the related tax effect of those adjustments and the tax effects of internal reorganizations. <U>WTW management did not provide to the WTW Board or Goldman Sachs projections for the line item components to calculate Adjusted Net
Income because such information was not material to their analysis.</U> </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(4)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">Unlevered Free Cash Flow is defined as (i)&nbsp;Adjusted EBITDA minus (ii)&nbsp;cash taxes, capital
expenditures, increases in net working capital <U>and other non-cash income / (expense) (including stock-based compensation expense)</U>, and other <FONT STYLE="white-space:nowrap">non-recurring</FONT> cash income/(expense). <U>WTW management
provided to the WTW Board and Goldman Sachs projections for 2020-2024 of (x)</U><U></U><U>&nbsp;cash taxes, (y)</U><U></U><U>&nbsp;capital expenditures and (z)</U><U></U><U>&nbsp;increases in net working capital and other non-cash income / (expense)
(including stock-based compensation expense) of (x) $362, $399, $443, $490 and $541, (y) $264, $277, $291, $305 and $321, and (z) $480, $504, $529, $555 and $583, respectively, and $120 in 2020 for
<FONT STYLE="white-space:nowrap">non-recurring</FONT> cash expense, to calculate Unlevered Free Cash Flow.</U><U> </U> </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(5)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">Levered Free Cash Flow is defined as (i)&nbsp;Unlevered Free Cash Flow minus
<FONT STYLE="white-space:nowrap">(ii)&nbsp;tax-affected</FONT> interest expense. </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(6)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">Adjusted Earnings Per Share is defined as adjusted net income divided by the diluted ordinary shares
outstanding <U>minus, for 2020E only, $0.10 per share to reflect estimated currency effects not already reflected in 2020E Adjusted Net Income</U>. </P></TD></TR></TABLE>
</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; font-size:10pt; font-family:Times New Roman"><B>Cautionary Statement Regarding Forward Looking Statements </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">This proxy supplement contains certain statements that are forward-looking, as that term is defined in the Private Securities Litigation Reform
Act of 1995, including statements related to Aon&#146;s and/or WTW&#146;s ability to manage its respective businesses and liquidity during and after the <FONT STYLE="white-space:nowrap">COVID-19</FONT> pandemic. Forward-looking statements are
prospective in nature and are not based on historical facts, but rather on current expectations of Aon and WTW management about future events. Forward-looking statements can often, but not always, be identified by the use of words such as
&#147;plans,&#148; &#147;expects,&#148; &#147;is subject to,&#148; &#147;budget,&#148; &#147;scheduled,&#148; &#147;estimates,&#148; &#147;forecasts,&#148; &#147;potential,&#148; &#147;continue,&#148; &#147;intends,&#148; &#147;anticipates,&#148;
&#147;believes&#148; or variations of such words, and statements that certain actions, events or results &#147;may,&#148; &#147;could,&#148; &#147;should,&#148; &#147;would,&#148; &#147;might&#148; or &#147;will&#148; be taken, occur or be achieved.
</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Although Aon and WTW management, as applicable, believe that the expectations reflected in these forward-looking statements are
reasonable, it can give no assurance that these expectations will prove to be correct. By their nature, forward-looking statements involve risks and uncertainties because they relate to events and depend on circumstances that will occur in the
future. There are a number of factors that could cause actual results and developments to differ materially from those expressed or implied by the forward-looking statements. Such factors include, but are not limited to; the possibility that the
transaction will not be consummated; </P>
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failure to obtain necessary shareholder and antitrust, competition and other regulatory approvals (without the imposition of material remedies or at all), or to satisfy any of the other
conditions to the closing of the transaction; adverse effects on the market price of Aon and/or WTW securities and on Aon&#146;s and/or WTW&#146;s operating results for any reason, including, without limitation, because of the failure to consummate
the transaction; the impact of <FONT STYLE="white-space:nowrap">COVID-19</FONT> on Aon&#146;s and/or WTW&#146;s operations and future plans; the failure to realize the expected benefits of the transaction (including anticipated revenue and growth
synergies); the failure to effectively integrate the combined companies following consummation of the transaction; negative effects of an announcement of the transaction; changes in global, political, economic, business, competitive, market and
regulatory forces; future exchange and interest rates; changes in tax laws, regulations, rates and policies; future business acquisitions or disposals; negative effects of any announcement relating to the consummation of or failure to consummate the
transaction on the market price of Aon and/or WTW securities; significant transaction and integration costs or difficulties in connection with the transaction and/or unknown or inestimable liabilities; pending or potential litigation associated with
the transaction; the potential impact of this proxy supplement or consummation of the transaction on relationships, including with suppliers, customers, clients, employees and regulators; and general economic, business and political conditions
(including any epidemic, pandemic or disease outbreak) that affect the combined companies following the consummation of the transaction. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">The factors identified above are not exhaustive. Aon, WTW and their subsidiaries operate in a dynamic business environment in which new risks
may emerge frequently. Other unknown or unpredictable factors could also cause actual results and developments to differ materially from those expressed or implied by the forward-looking statements. Forward-looking statements should therefore be
construed in the light of such factors. You are cautioned not to place undue reliance on any forward-looking statements, which speak only as of the date made. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Further information concerning Aon and its businesses, including economic, competitive, governmental, regulatory, technological and other
factors that could materially affect Aon&#146;s results of operations and financial condition, is contained in Aon&#146;s filings with the SEC. See Aon&#146;s Annual Report on Form <FONT STYLE="white-space:nowrap">10-K</FONT> for the year ended
December&nbsp;31, 2019, Quarterly Report on Form <FONT STYLE="white-space:nowrap">10-Q</FONT> for the quarter ended March&nbsp;31, 2020, and Quarterly Report on Form <FONT STYLE="white-space:nowrap">10-Q</FONT> for the quarter ended June&nbsp;30,
2020, filed with the SEC on February&nbsp;14, 2020, May&nbsp;1, 2020, and July&nbsp;31, 2020, respectively, and additional documents filed by Aon with the SEC after the date of this proxy supplement and prior to the Aon EGM, the contents of which
are incorporated by reference into this proxy supplement, for a further discussion of these and other risks and uncertainties applicable to Aon&#146;s businesses. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Further information concerning WTW and its businesses, including economic, competitive, governmental, regulatory, technological and other
factors that could materially affect WTW&#146;s results of operations and financial condition, is contained in WTW&#146;s filings with the SEC. See WTW&#146;s Annual Report on Form <FONT STYLE="white-space:nowrap">10-K</FONT> for the year ended
December&nbsp;31, 2019, Quarterly Report on Form <FONT STYLE="white-space:nowrap">10-Q</FONT> for the quarter ended March&nbsp;31, 2020, and Quarterly Report on Form <FONT STYLE="white-space:nowrap">10-Q</FONT> for the quarter ended June&nbsp;30,
2020, filed with the SEC on February&nbsp;26, 2020, April&nbsp;30, 2020, and July&nbsp;30, 2020, respectively, and additional documents filed by WTW with the SEC after the date of this proxy supplement and prior to the WTW Court Meeting and the WTW
EGM, the contents of which are incorporated by reference into this proxy supplement, for a further discussion of these and other risks and uncertainties applicable to WTW&#146;s businesses. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Any forward-looking statements in this proxy supplement are based upon information available as of the date of this proxy supplement which,
while believed to be true when made, may ultimately prove to be incorrect. Other than in accordance with legal or regulatory obligations, neither Aon nor WTW is under any obligation, and each expressly disclaims any intention or obligation, to
update or revise any forward-looking statement, whether as a result of new information, future events or otherwise. All subsequent written and oral forward-looking statements attributable to Aon, WTW and/or any person acting on behalf of any of them
are expressly qualified in their entirety by the foregoing paragraphs, and the information contained on any websites referenced in this proxy supplement is not incorporated by reference into this proxy supplement. </P>
<P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Additional Information and Where to Find It </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">In connection with the proposed transaction, WTW and Aon have filed relevant materials with the SEC, including the Definitive Proxy Statement.
Following the filing of the Definitive Proxy Statement with the SEC, WTW mailed the Definitive Proxy Statement, a proxy card related to the WTW Court Meeting and a proxy card related to the WTW EGM to each of its shareholders entitled to vote at
such meetings, and Aon mailed the Definitive Proxy Statement and a proxy card related to the Aon EGM to each of its shareholders entitled to vote at the Aon EGM. INVESTORS ARE URGED TO READ THE DEFINITIVE PROXY STATEMENT BECAUSE IT CONTAINS
IMPORTANT INFORMATION. Investors may obtain the Definitive Proxy Statement, as well as other filings containing information about WTW or Aon, free of charge, from the SEC&#146;s website at www.sec.gov. Investors may also obtain
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WTW&#146;s or Aon&#146;s SEC filings in connection with the transaction, free of charge, by requesting them in writing from WTW (through its proxy solicitors) or Aon (as applicable) as follows:
</P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Innisfree M&amp;A Incorporated</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">c/o WTW Company Secretary</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">501
Madison Avenue, 20<SUP STYLE="font-size:85%; vertical-align:top">th</SUP> Floor</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">New York, New York 10022</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Phone: 888 750 5884</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><U>corporatesecretary@willistowerswatson.com</U></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">OR</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Innisfree M&amp;A
Incorporated</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">c/o Matheson</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">70
Sir John Rogerson&#146;s Quay</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Dublin 2, Ireland</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Phone: +353 1 232 2000</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><U>dublin@matheson.com</U></P></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Aon plc<BR>Attn: Investor Relations</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">200 East Randolph Street<BR>Chicago, Illinois 60601<BR>Attn: Investor Relations<BR>Phone: 312 381 3310</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><U>investor.relations@aon.com</U></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">OR</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Arthur Cox</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Ten Earlsfort Terrance</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Dublin 2,
Ireland</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">Phone: +353 1 920 1000</P>
<P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><U>dublin@arthurcox.com</U></P></TD></TR>
</TABLE> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Participants in the Merger Solicitation </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">WTW, Aon and their directors, executive officers and employees and certain other persons may be deemed to be participants in the solicitation
of proxies in respect of the transaction for the purposes of the laws of the United States. Information regarding WTW&#146;s directors and executive officers is available in its definitive proxy statement for its 2020 annual general meeting of
shareholders filed with the SEC on April&nbsp;27, 2020. Information regarding Aon&#146;s directors and executive officers is available in its definitive proxy statement for its 2020 annual general meeting of shareholders filed with the SEC on
April&nbsp;24, 2020. Other information regarding the interests of the participants in the proxy solicitation is included in the Definitive Proxy Statement. These documents can be obtained free of charge from the sources indicated above. </P>
<P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Statement Required by the Irish Takeover Rules</B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">The directors of Aon accept responsibility for the information contained in this proxy supplement relating to Aon and the directors of Aon and
members of their immediate families, related trusts and persons connected with them. To the best of the knowledge and belief of the directors of Aon (who have taken all reasonable care to ensure that such is the case), the information contained in
this proxy supplement for which they accept responsibility is in accordance with the facts and does not omit anything likely to affect the import of such information. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">The directors of WTW accept responsibility for the information contained in this proxy supplement relating to WTW and the directors of WTW and
members of their immediate families, related trusts and persons connected with them. To the best of the knowledge and belief of the directors of WTW (who have taken all reasonable care to ensure such is the case), the information contained in this
proxy supplement for which they respectively accept responsibility is in accordance with the facts and does not omit anything likely to affect the import of such information </P>
<P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Dealing Disclosure Requirements </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Under
the provisions of Rule 8.3 of the Irish Takeover Panel Act, 1997, Takeover Rules 2013, referred to as the &#147;Irish Takeover Rules,&#148;, if any person is, or becomes, &#145;interested&#146; (directly or indirectly) in, 1% or more of any class of
&#145;relevant securities&#146; of WTW or Aon, all &#145;dealings&#146; in any &#145;relevant securities&#146; of WTW or Aon (including by means of an option in respect of, or a derivative referenced to, any such &#145;relevant securities&#146;)
must be publicly disclosed by not later than 3:30 p.m., EDT, on the &#145;business&#146; day following the date of the relevant transaction. This requirement will continue until the date on which the Scheme (as defined in the Definitive Proxy
Statement) becomes effective or on which the &#145;offer period&#146; otherwise ends. If two or more persons <FONT STYLE="white-space:nowrap">co-operate</FONT> on the basis of any agreement, either express or tacit, either oral or written, to
acquire an &#145;interest&#146; in &#145;relevant securities&#146; of WTW or Aon, they will be deemed to be a single person for the purpose of Rule 8.3 of the Irish Takeover Rules. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Under the provisions of Rule 8.1 of the Irish Takeover Rules, all &#145;dealings&#146; in &#145;relevant securities&#146; of WTW by Aon or
&#145;relevant securities&#146; of Aon by WTW, or by any party acting in concert with either of them, must also be disclosed by no later than 12:00 p.m., EDT, on the &#145;business&#146; day following the date of the relevant transaction. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">A disclosure table, giving details of the companies in whose &#145;relevant securities&#146; &#145;dealings&#146; should be disclosed, can be
found on the Irish Takeover Panel&#146;s website at <U>www.irishtakeoverpanel.ie.</U> &#145;Interests in securities&#146; arise, in summary, when a person has long economic exposure, whether conditional or absolute, to changes in the price of
securities. In particular, a person will be treated as having an &#145;interest&#146; by virtue of the ownership or control of securities, or by virtue of any option in respect of, or derivative referenced to, securities. </P>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:9%; font-size:10pt; font-family:Times New Roman">Terms in single quotation marks are defined in the Irish Takeover Rules, which can also be
found on the Irish Takeover Panel&#146;s website. If you are in any doubt as to whether or not you are required to disclose a dealing under Rule 8, please consult the Irish Takeover Panel&#146;s website at <U>www.irishtakeoverpanel.ie</U> or contact
the Irish Takeover Panel on telephone number +353 1 678 9020 or fax number +353 1 678 9289. </P>
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