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    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001697695</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
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    <issuerInfo>
      <issuerCik>0000315293</issuerCik>
      <issuerName>Aon plc</issuerName>
      <secFileNumber>001-07933</secFileNumber>
      <issuerAddress>
        <com:street1>METROPOLITAN BUILDING</com:street1>
        <com:street2>JAMES JOYCE STREET</com:street2>
        <com:city>DUBLIN 1</com:city>
        <com:stateOrCountry>L2</com:stateOrCountry>
        <com:zipCode>D01 K0Y8</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>35312666000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Andersen Eric</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>CLASS A</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>FIDELITY BROKERAGE SERVICES, LLC</name>
        <address>
          <com:street1>900 SALEM STREET</com:street1>
          <com:city>SMITHFIELD</com:city>
          <com:stateOrCountry>RI</com:stateOrCountry>
          <com:zipCode>02917</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>7500</noOfUnitsSold>
      <aggregateMarketValue>2516661.60</aggregateMarketValue>
      <noOfUnitsOutstanding>204245515</noOfUnitsOutstanding>
      <approxSaleDate>05/09/2023</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>CLASS A</securitiesClassTitle>
      <acquiredDate>02/17/2022</acquiredDate>
      <natureOfAcquisitionTransaction>RESTRICTED STOCK VESTING</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>7500</amountOfSecuritiesAcquired>
      <paymentDate>02/17/2022</paymentDate>
      <natureOfPayment>COMPENSATION</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>05/09/2023</noticeDate>
      <signature>/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Eric Andersen</signature>
    </noticeSignature>
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144
0001697695
XXXXXXXX
LIVE
0000315293
Aon plc
001-07933
METROPOLITAN BUILDING
JAMES JOYCE STREET
DUBLIN 1
L2
D01 K0Y8
35312666000
Andersen Eric
Officer
CLASS A
FIDELITY BROKERAGE SERVICES, LLC
900 SALEM STREET
SMITHFIELD
RI
02917
7500
2516661.60
204245515
05/09/2023
NYSE
CLASS A
02/17/2022
RESTRICTED STOCK VESTING
ISSUER
N
7500
02/17/2022
COMPENSATION
Y
05/09/2023
/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Eric Andersen