Aon plc ( www.aon.com ) (NYSE: AON) (the "Company") notes the recent media 
speculation regarding Willis Towers Watson.

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The Company confirms that it is in the early stages of considering an all-share 
business combination with Willis Towers Watson. The Company emphasizes that, at 
this point, its evaluation of a potential transaction is at a preliminary stage 
and there can be no certainty that any transaction will take place nor as to 
the form or terms on which any transaction might be pursued.

A further announcement will be made in due course, as appropriate.

In accordance with Rule 2.4 of the Irish Takeover Rules, Aon reserves the right 
to vary the form and/or mix of consideration described in this announcement.

About Aon
Aon plc ( www.aon.com ) (NYSE:AON) is a leading global professional services 
firm providing a broad range of risk, retirement and health solutions. Our 
50,000 colleagues in 120 countries empower results for clients by using 
proprietary data and analytics to deliver insights that reduce volatility and 
improve performance.

Forward-Looking Statements
This press release contains statements that are forward looking, as that term 
is defined by the Private Securities Litigation Reform Act of 1995. These 
forward-looking statements are based on management's beliefs, as well as 
assumptions made by, and information currently available to, management. When 
used in this press release, the words "believe," "anticipate," "estimate," 
"expect," "intend," "project," "plans," and similar expressions and the use of 
future dates are intended to identify forward looking statements. Although 
management believes that the expectations reflected in these forward-looking 
statements are reasonable, it can give no assurance that these expectations 
will prove to have been correct. These forward-looking statements involve risks 
and uncertainties that could cause actual results to differ materially from 
those predicted in any such forward-looking statements. Such factors include, 
but are not limited to, the possibility that a transaction will not be pursued 
and/or an offer will not be made, failure to obtain necessary shareholder or 
regulatory approvals or required financing or to satisfy any of the other 
conditions to a potential transaction, adverse effects on the market price of 
our Class A ordinary shares and on our operating results for any reason, 
including, without limitation, because of a failure to complete a transaction, 
failure to realize the expected benefits of a transaction, negative effects of 
an announcement or consummation or failure to consummate a transaction on the 
market price of our Class A ordinary shares, significant transaction costs 
and/or unknown liabilities and general economic and business conditions that 
affect the combined companies following any transaction. You are cautioned not 
to place undue reliance on any forward-looking statements, which speak only as 
of the date made. These statements are subject to certain risks, uncertainties, 
and assumptions.

Any or all of our forward-looking statements may turn out to be inaccurate, and 
there are no guarantees about Aon's performance.  The factors identified above 
are not exhaustive.  Aon and its subsidiaries operate in a dynamic business 
environment in which new risks may emerge frequently.  Further information 
concerning Aon and its businesses, including factors that potentially could 
materially affect Aon's financial results, is contained in Aon's filings with 
the SEC. See our Annual Report on Form 10-K for the year ended December 31, 
2018 and additional documents filed with the SEC for a further discussion of 
these and other risks and uncertainties applicable to Aon's businesses. These 
factors may be revised or supplemented in subsequent reports.  Aon is under no 
obligation, and expressly disclaims any obligation, to update or alter any 
forward-looking statement that it may make from time to time, whether as a 
result of new information, future events or otherwise.

Additional Information
This document is provided for informational purposes only and does not 
constitute an offer to sell, or an invitation to subscribe for or purchase or 
purchase or exchange, any securities or the solicitation of any vote or 
approval in any jurisdiction, nor shall there be any sale, issuance, exchange 
or transfer of the securities referred to in this document in any jurisdiction 
in contravention of applicable law. Subject to future developments, Aon may 
file a registration statement and/or a proxy statement with the SEC in 
connection with a combination. Holders of Willis Towers Watson and/or Aon 
shares should read those filings, and any other filings made by Aon with the 
SEC in connection with the combination, as they will contain important 
information. Those documents, if and when filed, as well as Aon's other public 
filings with the SEC may be obtained without charge at the SEC's website at 
www.sec.gov and at Aon's website at ir.aon.com.

This announcement has been prepared in accordance with English and Irish law 
and Rule 2.4 of the Irish Takeover Rules and information disclosed may not be 
the same as that which would have been prepared in accordance with the laws of 
jurisdictions outside England or Ireland.  The Company emphasizes that, at this 
point, the evaluation of a potential transaction is at a preliminary stage and 
there can be no certainty that any offer will take place nor as to the form or 
terms on which any offer might be made. This announcement is not an 
announcement of a firm intention to make an offer under Rule 2.5 of the Irish 
Takeover Panel Act, 1997, Takeover Rules 2013 and there can be no certainty 
that an offer will be made.

Contacts
Investor Contact:
Investor Relations
+1 312-381-3310
investor.relations@aon.com

A copy of this announcement will be available at www.aon.com. The content of 
the website referred to in this announcement is not incorporated into, and does 
not form part of, this announcement.

This announcement is not intended to, and does not, constitute or form part of 
any offer, invitation or the solicitation of an offer to purchase, otherwise 
acquire, subscribe for, sell or otherwise dispose of, any securities whether 
pursuant to this announcement or otherwise. The distribution of this 
announcement in jurisdictions outside Ireland or the United Kingdom may be 
restricted by law and therefore persons into whose possession this announcement 
comes should inform themselves about, and observe, such restrictions. Any 
failure to comply with the restrictions may constitute a violation of the 
securities law of any such jurisdiction.

RESPONSIBILITY STATEMENT
The directors of Aon plc accept responsibility for the information contained in 
this announcement. To the best of the knowledge and belief of the directors 
(who have taken all reasonable care to ensure that such is the case) the 
information contained in this announcement is in accordance with the facts and 
does not omit anything likely to affect the import of such information.

DISCLOSURE REQUIREMENTS UNDER THE IRISH TAKEOVER RULES
A person interested in (as defined in the Irish Takeover Rules) 1% or more of 
any class of relevant securities of Aon plc or Willis Towers Watson plc may 
have disclosure obligations under Rule 8.3 of the Irish Takeover Rules, 
effective from the date of this announcement. Such disclosures should be 
publicly disclosed by no later than 3.30pm (New York time) in respect of the 
relevant securities of both Aon plc and Willis Towers Watson plc on the 
business day following the date of the relevant transaction. The requirement 
will continue until the offer period ends. If two or more persons co-operate on 
the basis of any agreement, either express or tacit, either oral or written, to 
acquire an interest in relevant securities of either Aon plc or Willis Towers 
Watson plc, they will be deemed to be a single person for the purposes of Rule 
8.3 of the Irish Takeover Rules.  Under Rule 8.1 of the Irish Takeover Rules, 
all dealings in relevant securities of Willis Towers Watson plc by Aon plc, or 
relevant securities of Aon plc by Willis Towers Watson plc, or by any party 
acting in concert with either of them must also be disclosed by no later than 
12 noon (New York time) in respect of the relevant securities of both Aon plc 
and Willis Towers Watson plc on the business day following the date of the 
relevant transaction. Interests in securities arise, in summary, when a person 
has a long economic exposure, whether conditional or absolute, to changes in 
the price of securities. In particular, a person will be treated as having an 
interest by virtue of the ownership or control of securities, or by virtue of 
any option in respect of, or derivative referenced to, securities. Terms used 
in this paragraph should be read in light of the meanings given to those terms 
in the Irish Takeover Rules. If you are in any doubt as to whether or not you 
are required to disclose dealings under Rule 8, please consult with the Irish 
Takeover Panel's website at www.irishtakeoverpanel.ie or contact the Irish 
Takeover Panel by telephone on +353 1 678 9020.

SOURCE: Aon plc