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                    <ccc>XXXXXXXX</ccc>
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            <liveTestFlag>LIVE</liveTestFlag>



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            <issuerCik>0000872589</issuerCik>
            <issuerName>REGENERON PHARMACEUTICALS, INC.</issuerName>
            <secFileNumber>000-19034</secFileNumber>
            <issuerAddress>
                <ns2:street1>777 Old Saw Mill River Road</ns2:street1>
                <ns2:city>Tarrytown</ns2:city>
                <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                <ns2:zipCode>10591</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(914) 847-7000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>MARION E MCCOURT</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>274</noOfUnitsSold>
            <aggregateMarketValue>239451.34</aggregateMarketValue>
            <noOfUnitsOutstanding>108946984</noOfUnitsOutstanding>
            <approxSaleDate>01/02/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>12/08/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>274</amountOfSecuritiesAcquired>
            <paymentDate>12/08/2023</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
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                <name>MARION E MCCOURT</name>
                <address>
                    <ns2:street1>777 Old Saw Mill River Road</ns2:street1>
                    <ns2:city>Tarrytown</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10591</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>12/11/2023</saleDate>
            <amountOfSecuritiesSold>270</amountOfSecuritiesSold>
            <grossProceeds>226378.80</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>MARION E MCCOURT</name>
                <address>
                    <ns2:street1>777 Old Saw Mill River Road</ns2:street1>
                    <ns2:city>Tarrytown</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10591</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>11/01/2023</saleDate>
            <amountOfSecuritiesSold>1000</amountOfSecuritiesSold>
            <grossProceeds>783910.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>01/02/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>02/16/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>MARION E MCCOURT</signature>
        </noticeSignature>
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144
0001663758
XXXXXXXX
LIVE
0000872589
REGENERON PHARMACEUTICALS, INC.
000-19034
777 Old Saw Mill River Road
Tarrytown
NY
10591
(914) 847-7000
MARION E MCCOURT
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
38th Floor
New York
NY
10004
274
239451.34
108946984
01/02/2024
NASDAQ
Common
12/08/2023
Restricted Stock
Issuer
N
274
12/08/2023
Not Applicable
N
MARION E MCCOURT
777 Old Saw Mill River Road
Tarrytown
NY
10591
Common
12/11/2023
270
226378.80
MARION E MCCOURT
777 Old Saw Mill River Road
Tarrytown
NY
10591
Common
11/01/2023
1000
783910.00
01/02/2024
02/16/2023
MARION E MCCOURT