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    <headerData>
        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001560814</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001169561</issuerCik>
            <issuerName>COMMVAULT SYSTEMS, INC.</issuerName>
            <secFileNumber>001-33026</secFileNumber>
            <issuerAddress>
                <ns2:street1>1 Commvault Way</ns2:street1>
                <ns2:city>Tinton Falls</ns2:city>
                <ns2:stateOrCountry>NJ</ns2:stateOrCountry>
                <ns2:zipCode>07724</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(732) 870-4000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>GARY D MERRILL</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>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>872</noOfUnitsSold>
            <aggregateMarketValue>165191.11</aggregateMarketValue>
            <noOfUnitsOutstanding>43997606</noOfUnitsOutstanding>
            <approxSaleDate>02/19/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/17/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>170</amountOfSecuritiesAcquired>
            <paymentDate>08/17/2023</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/14/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Employee Stock Purchase Plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>14</amountOfSecuritiesAcquired>
            <paymentDate>08/14/2023</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/16/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>341</amountOfSecuritiesAcquired>
            <paymentDate>08/16/2023</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/17/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>128</amountOfSecuritiesAcquired>
            <paymentDate>08/17/2023</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/16/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>219</amountOfSecuritiesAcquired>
            <paymentDate>08/16/2023</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>GARY D MERRILL</name>
                <address>
                    <ns2:street1>1 Commvault Way</ns2:street1>
                    <ns2:city>Tinton Falls</ns2:city>
                    <ns2:stateOrCountry>NJ</ns2:stateOrCountry>
                    <ns2:zipCode>07724</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>11/20/2024</saleDate>
            <amountOfSecuritiesSold>555</amountOfSecuritiesSold>
            <grossProceeds>93428.70</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>02/19/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>11/20/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Gary D Merrill</signature>
        </noticeSignature>
    </formData>
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144
0001560814
XXXXXXXX
LIVE
0001169561
COMMVAULT SYSTEMS, INC.
001-33026
1 Commvault Way
Tinton Falls
NJ
07724
(732) 870-4000
GARY D MERRILL
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
872
165191.11
43997606
02/19/2025
NASDAQ
Common
08/17/2023
Restricted Stock
Issuer
N
170
08/17/2023
Not Applicable
Common
08/14/2023
Employee Stock Purchase Plan
Issuer
N
14
08/14/2023
Cash
Common
08/16/2023
Restricted Stock
Issuer
N
341
08/16/2023
Not Applicable
Common
08/17/2023
Performance Shares
Issuer
N
128
08/17/2023
Not Applicable
Common
08/16/2023
Performance Shares
Issuer
N
219
08/16/2023
Not Applicable
N
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
11/20/2024
555
93428.70
02/19/2025
11/20/2024
/s/ Gary D Merrill