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        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001707073</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0000785786</issuerCik>
            <issuerName>PLEXUS CORP</issuerName>
            <secFileNumber>001-14423</secFileNumber>
            <issuerAddress>
                <ns2:street1>PLEXUS CORP, ONE PLEXUS WAY</ns2:street1>
                <ns2:city>NEENAH</ns2:city>
                <ns2:stateOrCountry>WI</ns2:stateOrCountry>
                <ns2:zipCode>54956</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>9209696000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>KAREN M RAPP</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Director</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>1000</noOfUnitsSold>
            <aggregateMarketValue>110490.00</aggregateMarketValue>
            <noOfUnitsOutstanding>27387783</noOfUnitsOutstanding>
            <approxSaleDate>05/31/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>01/21/2020</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>500</amountOfSecuritiesAcquired>
            <paymentDate>01/21/2020</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>01/21/2020</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>500</amountOfSecuritiesAcquired>
            <paymentDate>01/21/2020</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>05/31/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>02/28/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Karen M. Rapp</signature>
        </noticeSignature>
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144
0001707073
XXXXXXXX
LIVE
0000785786
PLEXUS CORP
001-14423
PLEXUS CORP, ONE PLEXUS WAY
NEENAH
WI
54956
9209696000
KAREN M RAPP
Director
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
1000
110490.00
27387783
05/31/2024
NASDAQ
Common
01/21/2020
Restricted Stock Units
Issuer
N
500
01/21/2020
N/A
Common
01/21/2020
Restricted Stock Units
Issuer
N
500
01/21/2020
N/A
Y
05/31/2024
02/28/2024
/s/ Karen M. Rapp