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            <issuerAddress>
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                <ns2:city>Pittsburgh</ns2:city>
                <ns2:stateOrCountry>PA</ns2:stateOrCountry>
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                <address>
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                    <ns2:street2>38th Fl.</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
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            <aggregateMarketValue>4414800.00</aggregateMarketValue>
            <noOfUnitsOutstanding>35374823</noOfUnitsOutstanding>
            <approxSaleDate>09/01/2023</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
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            <securitiesClassTitle>Common</securitiesClassTitle>
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            <natureOfAcquisitionTransaction>Employee Stock Purchase Plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>30000</amountOfSecuritiesAcquired>
            <paymentDate>08/25/2011</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
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        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>09/01/2023</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>06/02/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Severin Hacker</signature>
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144
0001870272
XXXXXXXX
LIVE
0001562088
DUOLINGO INC CL A
001-40653
5900 Penn Avenue
Pittsburgh
PA
15206
4125676602
SBH TRUST U/A DTD 03/10/2020
Officer
COMMON
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
38th Fl.
New York
NY
10004
30000
4414800.00
35374823
09/01/2023
NASDAQ
Common
08/25/2011
Employee Stock Purchase Plan
Issuer
N
30000
08/25/2011
N/A
Y
09/01/2023
06/02/2023
/s/ Severin Hacker