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    <headerData>
        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001029613</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001053507</issuerCik>
            <issuerName>AMERICAN TOWER CORPORATION</issuerName>
            <secFileNumber>001-14195</secFileNumber>
            <issuerAddress>
                <ns2:street1>116 Huntington Avenue</ns2:street1>
                <ns2:city>Boston</ns2:city>
                <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                <ns2:zipCode>02116</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(617) 375-7500</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>ROBERT D HORMATS</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Director</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>150</noOfUnitsSold>
            <aggregateMarketValue>24958.50</aggregateMarketValue>
            <noOfUnitsOutstanding>466155521</noOfUnitsOutstanding>
            <approxSaleDate>10/16/2023</approxSaleDate>
            <securitiesExchangeName>NYSE</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/12/2019</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>150</amountOfSecuritiesAcquired>
            <paymentDate>03/12/2019</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT D HORMATS</name>
                <address>
                    <ns2:street1>116 Huntington Avenue</ns2:street1>
                    <ns2:city>Boston</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02116</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>10/02/2023</saleDate>
            <amountOfSecuritiesSold>150</amountOfSecuritiesSold>
            <grossProceeds>24544.50</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT D HORMATS</name>
                <address>
                    <ns2:street1>116 Huntington Avenue</ns2:street1>
                    <ns2:city>Boston</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02116</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>08/15/2023</saleDate>
            <amountOfSecuritiesSold>125</amountOfSecuritiesSold>
            <grossProceeds>23137.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT D HORMATS</name>
                <address>
                    <ns2:street1>116 Huntington Avenue</ns2:street1>
                    <ns2:city>Boston</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02116</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>08/01/2023</saleDate>
            <amountOfSecuritiesSold>125</amountOfSecuritiesSold>
            <grossProceeds>23137.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>10/16/2023</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>04/27/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Robert D Hormats</signature>
        </noticeSignature>
    </formData>
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144
0001029613
XXXXXXXX
LIVE
0001053507
AMERICAN TOWER CORPORATION
001-14195
116 Huntington Avenue
Boston
MA
02116
(617) 375-7500
ROBERT D HORMATS
Director
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
38th Floor
New York
NY
10004
150
24958.50
466155521
10/16/2023
NYSE
Common
03/12/2019
Restricted Stock
Issuer
N
150
03/12/2019
Not Applicable
N
ROBERT D HORMATS
116 Huntington Avenue
Boston
MA
02116
Common
10/02/2023
150
24544.50
ROBERT D HORMATS
116 Huntington Avenue
Boston
MA
02116
Common
08/15/2023
125
23137.00
ROBERT D HORMATS
116 Huntington Avenue
Boston
MA
02116
Common
08/01/2023
125
23137.00
10/16/2023
04/27/2023
/s/ Robert D Hormats