<SEC-DOCUMENT>0001179110-17-009677.txt : 20170627
<SEC-HEADER>0001179110-17-009677.hdr.sgml : 20170627
<ACCEPTANCE-DATETIME>20170627172811
ACCESSION NUMBER:		0001179110-17-009677
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20170623
FILED AS OF DATE:		20170627
DATE AS OF CHANGE:		20170627

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:			KNIGHT LESTER B
		CENTRAL INDEX KEY:			0001023262

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07933
		FILM NUMBER:		17933210

	MAIL ADDRESS:	
		STREET 1:		C/O AON CORP
		STREET 2:		200 EAST RANDOLPH STREET
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60601
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-06-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001023262</rptOwnerCik>
            <rptOwnerName>KNIGHT LESTER B</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>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Ordinary Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2017-06-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2908</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2908</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>124604</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Wife</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>141044</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Ordinary Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>75000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Family Partnership</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Class A Ordinary Shares granted annually to each non-employee director of Aon plc. In accordance with U.K. law, reporting person agreed to pay the issuer the nominal value of US $0.01 per share issued the reporting person.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Molly Johnson - by Molly Johnson pursuant to a power of attorney from Lester B. Knight</signatureName>
        <signatureDate>2017-06-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.POA
<SEQUENCE>2
<FILENAME>ex24knight.txt
<TEXT>
                               POWER OF ATTORNEY

I,  Lester B. Knight ("Grantor"), hereby confirm, constitute and appoint each of
Michael  Wolf,  Michele  Welsh and Molly Johnson, or any of them signing singly,
and  with full power of substitution, as the true and lawful attorney-in-fact of
Grantor to:

      prepare,  execute in Grantor's name and on Grantor's behalf, and submit to
      the  United  States  Securities and Exchange Commission (the "SEC") a Form
      ID,  including  amendments  thereto,  and any other documents necessary or
      appropriate to obtain codes and passwords enabling the undersigned to make
      electronic  filings  with  the SEC of reports required by Section 16(a) of
      the  Securities  Exchange  Act of 1934, as amended (the "Exchange Act") or
      any rule or regulation promulgated by the SEC;

      execute for and on behalf of Grantor, in Grantor's capacity as an officer,
      director  or  greater  than  ten  percent  shareholder  of  Aon  plc  (the
      "Company"),  Forms 3, 4 and 5, including but not limited to any amendments
      thereto,  in  accordance  with  Section 16(a) of the Exchange Act, and the
      rules  promulgated  thereunder,  which  may be necessary or desirable as a
      result  of  Grantor's  ownership  of  or  transaction in securities of the
      Company; and

      do  and perform any and all acts for and on behalf of Grantor which may be
      necessary  or desirable to complete and execute any such Form 3, 4 or 5 or
      any  amendments  thereto,  and  timely file such form with the SEC and any
      other stock exchange or similar authority.

Grantor  hereby grants to each such attorney-in-fact full power and authority to
do  and  perform  any and every act and thing whatsoever requisite, necessary or
proper  to  be  done  in  the  exercise  of  any of the rights and powers herein
granted,  as fully to all intents and purposes as the undersigned might or could
do  if personally present, with full power of substitution or revocation, hereby
ratifying   and   confirming   all   that   such   attorney-in-fact,   or   such
attorney-in-fact's  substitute  or substitutes, shall lawfully do or cause to be
done  by  virtue  of  this  power  of  attorney and the rights and powers herein
granted.  Grantor  acknowledges that the foregoing attorneys-in-fact, in serving
in such capacity at the request of Grantor, are not assuming, nor is the Company
assuming,  any  of  Grantor's  responsibilities to comply with Section 16 of the
Exchange Act.

This  Power of Attorney shall be effective on the date set forth below and shall
continue in full force and effect until the date on which Grantor shall cease to
be  subject  to  Section  16  of  the  Exchange  Act  and  the rules promulgated
thereunder  or until such earlier date on which written notification executed by
Grantor is filed with the SEC expressly revoking this Power of Attorney.

IN  WITNESS WHEREOF, Grantor has caused this Power of Attorney to be executed as
of this 18 day of November, 2016

Signature:           /s/ Lester B. Knight
                     ------------------------------

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
