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            <filer>
                <filerCredentials>
                    <cik>0001973354</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
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        <issuerInfo>
            <issuerCik>0001060955</issuerCik>
            <issuerName>ICON PLC</issuerName>
            <secFileNumber>333-08704</secFileNumber>
            <issuerAddress>
                <ns2:street1>South County Business Park</ns2:street1>
                <ns2:street2>Leopardstown</ns2:street2>
                <ns2:city>Dublin 18</ns2:city>
                <ns2:stateOrCountry>L2</ns2:stateOrCountry>
                <ns2:zipCode>D18 X5R3</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>353-1-291-2000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>DIARMAID CUNNINGHAM</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>5969</noOfUnitsSold>
            <aggregateMarketValue>1972303.84</aggregateMarketValue>
            <noOfUnitsOutstanding>82816600</noOfUnitsOutstanding>
            <approxSaleDate>07/30/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2022</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1282</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2022</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2020</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1267</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2020</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1437</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2021</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2020</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units Vested Under Issuer S-8 Registered Plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>305</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2020</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units Vested Under Issuer S-8 Registered Plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>293</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2021</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units Vested Under Issuer S-8 Registered Plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>200</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2021</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2020</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units Vested Under Issuer S-8 Registered Plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>237</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2020</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
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            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>227</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2021</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2022</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units Vested Under Issuer S-8 Registered Plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>202</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2022</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2022</acquiredDate>
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            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>226</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2022</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units Vested Under Issuer S-8 Registered Plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>93</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2023</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2022</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units Vested Under Issuer S-8 Registered Plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>200</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2022</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>DIARMAID CUNNINGHAM</name>
                <address>
                    <ns2:street1>South County Business Park</ns2:street1>
                    <ns2:street2>Leopardstown</ns2:street2>
                    <ns2:city>Dublin 18</ns2:city>
                    <ns2:stateOrCountry>L2</ns2:stateOrCountry>
                    <ns2:zipCode>D18 X5R3</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/05/2024</saleDate>
            <amountOfSecuritiesSold>4877</amountOfSecuritiesSold>
            <grossProceeds>1604533.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>07/30/2024</noticeDate>
            <planAdoptionDates/>
            <signature>/s/ Diarmaid Cunningham</signature>
        </noticeSignature>
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144
0001973354
XXXXXXXX
LIVE
0001060955
ICON PLC
333-08704
South County Business Park
Leopardstown
Dublin 18
L2
D18 X5R3
353-1-291-2000
DIARMAID CUNNINGHAM
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
5969
1972303.84
82816600
07/30/2024
NASDAQ
Common
03/03/2022
Performance Stock Units
Issuer
N
1282
03/03/2022
Services Rendered
Common
03/03/2020
Performance Stock Units
Issuer
N
1267
03/03/2020
Services Rendered
Common
03/03/2021
Performance Stock Units
Issuer
N
1437
03/03/2021
Services Rendered
Common
03/03/2020
Restricted Stock Units Vested Under Issuer S-8 Registered Plan
Issuer
N
305
03/03/2020
Services Rendered
Common
03/03/2021
Restricted Stock Units Vested Under Issuer S-8 Registered Plan
Issuer
N
293
03/03/2021
Services Rendered
Common
03/03/2021
Restricted Stock Units Vested Under Issuer S-8 Registered Plan
Issuer
N
200
03/03/2021
Services Rendered
Common
03/03/2020
Restricted Stock Units Vested Under Issuer S-8 Registered Plan
Issuer
N
237
03/03/2020
Services Rendered
Common
03/03/2021
Restricted Stock Units Vested Under Issuer S-8 Registered Plan
Issuer
N
227
03/03/2021
Services Rendered
Common
03/03/2022
Restricted Stock Units Vested Under Issuer S-8 Registered Plan
Issuer
N
202
03/03/2022
Services Rendered
Common
03/03/2022
Restricted Stock Units Vested Under Issuer S-8 Registered Plan
Issuer
N
226
03/03/2022
Services Rendered
Common
03/03/2023
Restricted Stock Units Vested Under Issuer S-8 Registered Plan
Issuer
N
93
03/03/2023
Services Rendered
Common
03/03/2022
Restricted Stock Units Vested Under Issuer S-8 Registered Plan
Issuer
N
200
03/03/2022
Services Rendered
N
DIARMAID CUNNINGHAM
South County Business Park
Leopardstown
Dublin 18
L2
D18 X5R3
Common
06/05/2024
4877
1604533.00
07/30/2024
/s/ Diarmaid Cunningham