<SEC-DOCUMENT>0001179110-17-002849.txt : 20170221
<SEC-HEADER>0001179110-17-002849.hdr.sgml : 20170221
<ACCEPTANCE-DATETIME>20170221203031
ACCESSION NUMBER:		0001179110-17-002849
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170216
FILED AS OF DATE:		20170221
DATE AS OF CHANGE:		20170221

ISSUER:		

	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

	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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Meissner Laurel G.
		CENTRAL INDEX KEY:			0001430384

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07933
		FILM NUMBER:		17626849

	MAIL ADDRESS:	
		STREET 1:		1303 E. ALGONQUIN ROAD
		CITY:			SCHAUMBURG
		STATE:			IL
		ZIP:			60196
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
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    <documentType>4</documentType>

    <periodOfReport>2017-02-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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        <issuerCik>0000315293</issuerCik>
        <issuerName>Aon plc</issuerName>
        <issuerTradingSymbol>AON</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001430384</rptOwnerCik>
            <rptOwnerName>Meissner Laurel G.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>AON CORPORATION - CORPORATE LAW DEPT</rptOwnerStreet1>
            <rptOwnerStreet2>200 EAST RANDOLPH STREET, 8TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60601</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP &amp; Global Controller</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
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                <value>Class A Ordinary Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2017-02-16</value>
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                <equitySwapInvolved>0</equitySwapInvolved>
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                    <value>14362</value>
                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                <transactionPricePerShare>
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                <value>2017-02-17</value>
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                <transactionFormType>4</transactionFormType>
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                <equitySwapInvolved>0</equitySwapInvolved>
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                    <value>616</value>
                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                <sharesOwnedFollowingTransaction>
                    <value>20582</value>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Ordinary Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2017-02-17</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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                    <value>268</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>117.530</value>
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        </nonDerivativeTransaction>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Share Unit (Right to Receive)</value>
            </securityTitle>
            <conversionOrExercisePrice>
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                <value>2017-02-16</value>
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                </transactionShares>
                <transactionPricePerShare>
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            </transactionAmounts>
            <exerciseDate>
                <value>2018-02-16</value>
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            <expirationDate>
                <value>2020-02-16</value>
                <footnoteId id="F6"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
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                </underlyingSecurityTitle>
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                    <value>1492</value>
                </underlyingSecurityShares>
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                <value>2017-02-17</value>
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                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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                    <value>582</value>
                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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                <value>2017-02-19</value>
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                    <value>582</value>
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            <securityTitle>
                <value>Restricted Share Unit (Right to Receive)</value>
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                <transactionShares>
                    <value>616</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2017-02-18</value>
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                <value>2019-02-18</value>
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                <sharesOwnedFollowingTransaction>
                    <value>1234</value>
                </sharesOwnedFollowingTransaction>
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    <footnotes>
        <footnote id="F1">Represents Class A Ordinary Shares issued upon the settlement of performance share units originally granted approximately three years ago under the ninth cycle of the Leadership Performance Program (&quot;LPP9&quot;) on March 13, 2014. The number of shares issued was determined by the Organization and Compensation Committee of Aon's Board of Directors on February 16, 2017 based upon Aon's performance relative to a cumulative adjusted three year earnings per share target for the period beginning January 1, 2014 and ending December 31, 2016. The terms of LPP9 are more fully described in Aon plc's proxy statement filed with the SEC on April 24, 2015.</footnote>
        <footnote id="F2">Class A Ordinary Shares withheld by the issuer for the payment of withholding taxes in connection with the vesting of a performance share unit award.</footnote>
        <footnote id="F3">Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.</footnote>
        <footnote id="F4">Class A Ordinary Shares withheld by the issuer for the payment of withholding taxes in connection with the vesting of a restricted share unit award.</footnote>
        <footnote id="F5">The restricted share unit award converts to Class A Ordinary Shares on 1-for-1 basis. In accordance with U.K. law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.</footnote>
        <footnote id="F6">The restricted share unit award vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan as follows: 33 1/3% of the awards vest on each of the first through third anniversaries of the date of the grant.</footnote>
        <footnote id="F7">A restricted share unit award was granted on February 19, 2015 and vests in accordance with the terms of the Aon Stock Incentive Plan as follows: 33 1/3% of the awards vest on each of the first through third anniversaries of the date of the grant.</footnote>
        <footnote id="F8">A restricted share unit award was granted on February 18, 2016 and vests in accordance with the terms of the Aon Stock Incentive Plan as follows: 33 1/3% of the awards vest on each of the first through third anniversaries of the date of the grant.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Michele D. Welsh- Michele D. Welsh pursuant to a power of attorney from Laurel Meissner</signatureName>
        <signatureDate>2017-02-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
