<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:ns2="http://www.sec.gov/edgar/common">
    <headerData>
        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001804048</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0000857005</issuerCik>
            <issuerName>PTC INC.</issuerName>
            <secFileNumber>000-18059</secFileNumber>
            <issuerAddress>
                <ns2:street1>121 Seaport Boulevard</ns2:street1>
                <ns2:city>Boston</ns2:city>
                <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                <ns2:zipCode>02210</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(781) 370-5000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>MICHAEL J DITULLIO</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>38th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>10613</noOfUnitsSold>
            <aggregateMarketValue>1634478.97</aggregateMarketValue>
            <noOfUnitsOutstanding>118833211</noOfUnitsOutstanding>
            <approxSaleDate>11/16/2023</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>11/15/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>4876</amountOfSecuritiesAcquired>
            <paymentDate>11/15/2023</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>11/15/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>5737</amountOfSecuritiesAcquired>
            <paymentDate>11/15/2023</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>MICHAEL J DITULLIO</name>
                <address>
                    <ns2:street1>121 Seaport Boulevard</ns2:street1>
                    <ns2:city>Boston</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02210</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>09/15/2023</saleDate>
            <amountOfSecuritiesSold>3000</amountOfSecuritiesSold>
            <grossProceeds>422130.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>11/16/2023</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>12/09/2022</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Michael Joseph Ditullio</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
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144
0001804048
XXXXXXXX
LIVE
0000857005
PTC INC.
000-18059
121 Seaport Boulevard
Boston
MA
02210
(781) 370-5000
MICHAEL J DITULLIO
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
38th Floor
New York
NY
10004
10613
1634478.97
118833211
11/16/2023
NASDAQ
COMMON
11/15/2023
Restricted Stock
ISSUER
N
4876
11/15/2023
Not Applicable
COMMON
11/15/2023
Performance Shares
ISSUER
N
5737
11/15/2023
Not Applicable
N
MICHAEL J DITULLIO
121 Seaport Boulevard
Boston
MA
02210
Common
09/15/2023
3000
422130.00
11/16/2023
12/09/2022
/s/ Michael Joseph Ditullio