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            <liveTestFlag>LIVE</liveTestFlag>



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            <secFileNumber>000-26301</secFileNumber>
            <issuerAddress>
                <ns2:street1>1040 SPRING STREET</ns2:street1>
                <ns2:city>SILVER SPRING</ns2:city>
                <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                <ns2:zipCode>20910</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(301) 608-9292</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>PAUL MAHON</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>6000</noOfUnitsSold>
            <aggregateMarketValue>1333149.60</aggregateMarketValue>
            <noOfUnitsOutstanding>46932640</noOfUnitsOutstanding>
            <approxSaleDate>09/21/2023</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>09/21/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>6000</amountOfSecuritiesAcquired>
            <paymentDate>09/21/2023</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
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                    <ns2:city>SILVER SPRING</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>20910</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
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            <amountOfSecuritiesSold>6000</amountOfSecuritiesSold>
            <grossProceeds>1337904.60</grossProceeds>
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        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>PAUL MAHON</name>
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                    <ns2:city>SILVER SPRING</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>20910</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
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            <amountOfSecuritiesSold>6000</amountOfSecuritiesSold>
            <grossProceeds>1377264.60</grossProceeds>
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        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>PAUL MAHON</name>
                <address>
                    <ns2:street1>1040 SPRING STREET</ns2:street1>
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                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>20910</ns2:zipCode>
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            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>08/03/2023</saleDate>
            <amountOfSecuritiesSold>6000</amountOfSecuritiesSold>
            <grossProceeds>1417470.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>PAUL MAHON</name>
                <address>
                    <ns2:street1>1040 SPRING STREET</ns2:street1>
                    <ns2:city>SILVER SPRING</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>20910</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>07/20/2023</saleDate>
            <amountOfSecuritiesSold>2500</amountOfSecuritiesSold>
            <grossProceeds>609675.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>PAUL MAHON</name>
                <address>
                    <ns2:street1>1040 SPRING STREET</ns2:street1>
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                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>20910</ns2:zipCode>
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            <saleDate>07/06/2023</saleDate>
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            <grossProceeds>1291165.20</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>09/21/2023</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>03/17/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Paul A. Mahon</signature>
        </noticeSignature>
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144
0001231589
XXXXXXXX
LIVE
0001082554
UNITED THERAPEUTICS CORPORATION
000-26301
1040 SPRING STREET
SILVER SPRING
MD
20910
(301) 608-9292
PAUL MAHON
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
38th Floor
New York
NY
10004
6000
1333149.60
46932640
09/21/2023
NASDAQ
Common
09/21/2023
Stock Option Exercise
Issuer
N
6000
09/21/2023
Cash
N
PAUL MAHON
1040 SPRING STREET
SILVER SPRING
MD
20910
Common
09/07/2023
6000
1337904.60
PAUL MAHON
1040 SPRING STREET
SILVER SPRING
MD
20910
Common
08/17/2023
6000
1377264.60
PAUL MAHON
1040 SPRING STREET
SILVER SPRING
MD
20910
Common
08/03/2023
6000
1417470.00
PAUL MAHON
1040 SPRING STREET
SILVER SPRING
MD
20910
Common
07/20/2023
2500
609675.00
PAUL MAHON
1040 SPRING STREET
SILVER SPRING
MD
20910
Common
07/06/2023
6000
1291165.20
09/21/2023
03/17/2023
/s/ Paul A. Mahon