<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:ns2="http://www.sec.gov/edgar/common">
    <headerData>
        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001765820</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>SANJAY MIRCHANDANI</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
                <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>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>21494</noOfUnitsSold>
            <aggregateMarketValue>2102540.93</aggregateMarketValue>
            <noOfUnitsOutstanding>43661621</noOfUnitsOutstanding>
            <approxSaleDate>03/04/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>02/17/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>3172</amountOfSecuritiesAcquired>
            <paymentDate>02/17/2024</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>02/16/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>4822</amountOfSecuritiesAcquired>
            <paymentDate>02/16/2024</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>08/15/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1690</amountOfSecuritiesAcquired>
            <paymentDate>08/15/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>08/04/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>2340</amountOfSecuritiesAcquired>
            <paymentDate>08/04/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>05/04/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>2333</amountOfSecuritiesAcquired>
            <paymentDate>05/04/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>05/22/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>977</amountOfSecuritiesAcquired>
            <paymentDate>05/22/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>08/22/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>4492</amountOfSecuritiesAcquired>
            <paymentDate>08/22/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>02/15/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1668</amountOfSecuritiesAcquired>
            <paymentDate>02/15/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>SANJAY MIRCHANDANI</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>02/21/2024</saleDate>
            <amountOfSecuritiesSold>3787</amountOfSecuritiesSold>
            <grossProceeds>344894.34</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>SANJAY MIRCHANDANI</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>02/20/2024</saleDate>
            <amountOfSecuritiesSold>2688</amountOfSecuritiesSold>
            <grossProceeds>247882.97</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>03/04/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>12/04/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Sanjay Sunder Mirchandani</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
[{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 8903}]
144
0001765820
XXXXXXXX
LIVE
0001169561
COMMVAULT SYSTEMS, INC.
001-33026
1 Commvault Way
Tinton Falls
NJ
07724
(732) 870-4000
SANJAY MIRCHANDANI
Officer
Director
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
21494
2102540.93
43661621
03/04/2024
NASDAQ
COMMON
02/17/2024
Restricted Stock
ISSUER
N
3172
02/17/2024
Not Applicable
COMMON
02/16/2024
Restricted Stock
ISSUER
N
4822
02/16/2024
Not Applicable
COMMON
08/15/2021
Restricted Stock
ISSUER
N
1690
08/15/2021
Not Applicable
COMMON
08/04/2021
Restricted Stock
ISSUER
N
2340
08/04/2021
Not Applicable
COMMON
05/04/2021
Restricted Stock
ISSUER
N
2333
05/04/2021
Not Applicable
COMMON
05/22/2021
Restricted Stock
ISSUER
N
977
05/22/2021
Not Applicable
COMMON
08/22/2021
Restricted Stock
ISSUER
N
4492
08/22/2021
Not Applicable
COMMON
02/15/2021
Restricted Stock
ISSUER
N
1668
02/15/2021
Not Applicable
N
SANJAY MIRCHANDANI
1 Commvault Way
Tinton Falls
NJ
07724
Common
02/21/2024
3787
344894.34
SANJAY MIRCHANDANI
1 Commvault Way
Tinton Falls
NJ
07724
Common
02/20/2024
2688
247882.97
03/04/2024
12/04/2023
/s/ Sanjay Sunder Mirchandani