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        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001680115</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001013857</issuerCik>
            <issuerName>PEGASYSTEMS, INC.</issuerName>
            <secFileNumber>001-11859</secFileNumber>
            <issuerAddress>
                <ns2:street1>225 Wyman Street</ns2:street1>
                <ns2:city>Waltham</ns2:city>
                <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                <ns2:zipCode>02451</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>6173749600</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>KENNETH STILLWELL</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>2000</noOfUnitsSold>
            <aggregateMarketValue>196300.00</aggregateMarketValue>
            <noOfUnitsOutstanding>85118570</noOfUnitsOutstanding>
            <approxSaleDate>06/02/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/01/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>2000</amountOfSecuritiesAcquired>
            <paymentDate>03/01/2024</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for KENNETH STILLWELL</name>
                <address>
                    <ns2:street1>225 Wyman Street</ns2:street1>
                    <ns2:city>Waltham</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02451</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/01/2025</saleDate>
            <amountOfSecuritiesSold>2000</amountOfSecuritiesSold>
            <grossProceeds>185862.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>KENNETH STILLWELL JR.</name>
                <address>
                    <ns2:street1>225 Wyman Street</ns2:street1>
                    <ns2:city>Waltham</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02451</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>04/25/2025</saleDate>
            <amountOfSecuritiesSold>17713</amountOfSecuritiesSold>
            <grossProceeds>1582833.68</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for KENNETH STILLWELL</name>
                <address>
                    <ns2:street1>225 Wyman Street</ns2:street1>
                    <ns2:city>Waltham</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02451</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>04/01/2025</saleDate>
            <amountOfSecuritiesSold>2000</amountOfSecuritiesSold>
            <grossProceeds>139490.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for KENNETH STILLWELL</name>
                <address>
                    <ns2:street1>225 Wyman Street</ns2:street1>
                    <ns2:city>Waltham</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02451</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>03/03/2025</saleDate>
            <amountOfSecuritiesSold>2000</amountOfSecuritiesSold>
            <grossProceeds>156620.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <remarks>The securities to be sold were acquired upon the vesting of restricted stock units during the period of 3/1/2024 through 12/7/2024.
</remarks>
        <noticeSignature>
            <noticeDate>06/02/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>08/29/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Kenneth Stillwell</signature>
        </noticeSignature>
    </formData>
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144
0001680115
XXXXXXXX
LIVE
0001013857
PEGASYSTEMS, INC.
001-11859
225 Wyman Street
Waltham
MA
02451
6173749600
KENNETH STILLWELL
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
2000
196300.00
85118570
06/02/2025
NASDAQ
Common
03/01/2024
Restricted Stock Units
Issuer
N
2000
03/01/2024
N/A
N
10b5-1 Sales for KENNETH STILLWELL
225 Wyman Street
Waltham
MA
02451
Common
05/01/2025
2000
185862.00
KENNETH STILLWELL JR.
225 Wyman Street
Waltham
MA
02451
Common
04/25/2025
17713
1582833.68
10b5-1 Sales for KENNETH STILLWELL
225 Wyman Street
Waltham
MA
02451
Common
04/01/2025
2000
139490.00
10b5-1 Sales for KENNETH STILLWELL
225 Wyman Street
Waltham
MA
02451
Common
03/03/2025
2000
156620.00
The securities to be sold were acquired upon the vesting of restricted stock units during the period of 3/1/2024 through 12/7/2024.
06/02/2025
08/29/2024
/s/ Kenneth Stillwell