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



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        <issuerInfo>
            <issuerCik>0001561550</issuerCik>
            <issuerName>DATADOG INC CL A</issuerName>
            <secFileNumber>001-39051</secFileNumber>
            <issuerAddress>
                <ns2:street1>620 EIGHTH AVENUE, 45TH FLOOR </ns2:street1>
                <ns2:city>NEW YORK </ns2:city>
                <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                <ns2:zipCode>10018</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>8663294466</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>ALEXIS T LEQUOC</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 Fl.</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>71364</noOfUnitsSold>
            <aggregateMarketValue>6382796.16</aggregateMarketValue>
            <noOfUnitsOutstanding>299066738</noOfUnitsOutstanding>
            <approxSaleDate>08/14/2023</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
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            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/14/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Exercise of Stock Options</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>71364</amountOfSecuritiesAcquired>
            <paymentDate>08/14/2023</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for X DAYS TIL CAMPING TRUST </name>
                <address>
                    <ns2:street1>620 EIGHTH AVENUE, 45TH FLOOR </ns2:street1>
                    <ns2:city>NEW YORK </ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10018</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>07/19/2023</saleDate>
            <amountOfSecuritiesSold>500</amountOfSecuritiesSold>
            <grossProceeds>58000.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
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                    <ns2:street1>620 EIGHTH AVENUE, 45TH FLOOR </ns2:street1>
                    <ns2:city>NEW YORK </ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10018</ns2:zipCode>
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            <securitiesClassTitle>Common</securitiesClassTitle>
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            <amountOfSecuritiesSold>71364</amountOfSecuritiesSold>
            <grossProceeds>7052961.21</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
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                <address>
                    <ns2:street1>620 EIGHTH AVENUE, 45TH FLOOR </ns2:street1>
                    <ns2:city>NEW YORK </ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10018</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/28/2023</saleDate>
            <amountOfSecuritiesSold>500</amountOfSecuritiesSold>
            <grossProceeds>50000.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for X DAYS TIL CAMPING TRUST </name>
                <address>
                    <ns2:street1>620 EIGHTH AVENUE, 45TH FLOOR </ns2:street1>
                    <ns2:city>NEW YORK </ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10018</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/16/2023</saleDate>
            <amountOfSecuritiesSold>2500</amountOfSecuritiesSold>
            <grossProceeds>242528.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for ALEXIS T LEQUOC</name>
                <address>
                    <ns2:street1>620 EIGHTH AVENUE, 45TH FLOOR </ns2:street1>
                    <ns2:city>NEW YORK </ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10018</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/06/2023</saleDate>
            <amountOfSecuritiesSold>71364</amountOfSecuritiesSold>
            <grossProceeds>7285529.35</grossProceeds>
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        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ALEXIS T LEQUOC</name>
                <address>
                    <ns2:street1>620 EIGHTH AVENUE, 45TH FLOOR </ns2:street1>
                    <ns2:city>NEW YORK </ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10018</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/02/2023</saleDate>
            <amountOfSecuritiesSold>13741</amountOfSecuritiesSold>
            <grossProceeds>1378662.01</grossProceeds>
        </securitiesSoldInPast3Months>
        <remarks>Securities to be sold were registered on Form S-8</remarks>
        <noticeSignature>
            <noticeDate>08/14/2023</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>09/15/2022</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Alexis Le-Quoc</signature>
        </noticeSignature>
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144
0001783984
XXXXXXXX
LIVE
0001561550
DATADOG INC CL A
001-39051
620 EIGHTH AVENUE, 45TH FLOOR
NEW YORK
NY
10018
8663294466
ALEXIS T LEQUOC
Officer
COMMON
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
38th Fl.
New York
NY
10004
71364
6382796.16
299066738
08/14/2023
NASDAQ
Common
08/14/2023
Exercise of Stock Options
Issuer
N
71364
08/14/2023
Cash
N
10b5-1 Sales for X DAYS TIL CAMPING TRUST
620 EIGHTH AVENUE, 45TH FLOOR
NEW YORK
NY
10018
Common
07/19/2023
500
58000.00
10b5-1 Sales for ALEXIS T LEQUOC
620 EIGHTH AVENUE, 45TH FLOOR
NEW YORK
NY
10018
Common
07/07/2023
71364
7052961.21
10b5-1 Sales for X DAYS TIL CAMPING TRUST
620 EIGHTH AVENUE, 45TH FLOOR
NEW YORK
NY
10018
Common
06/28/2023
500
50000.00
10b5-1 Sales for X DAYS TIL CAMPING TRUST
620 EIGHTH AVENUE, 45TH FLOOR
NEW YORK
NY
10018
Common
06/16/2023
2500
242528.00
10b5-1 Sales for ALEXIS T LEQUOC
620 EIGHTH AVENUE, 45TH FLOOR
NEW YORK
NY
10018
Common
06/06/2023
71364
7285529.35
ALEXIS T LEQUOC
620 EIGHTH AVENUE, 45TH FLOOR
NEW YORK
NY
10018
Common
06/02/2023
13741
1378662.01
Securities to be sold were registered on Form S-8
08/14/2023
09/15/2022
/s/ Alexis Le-Quoc