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            <filer>
                <filerCredentials>
                    <cik>0001560814</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



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            <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>214</noOfUnitsSold>
            <aggregateMarketValue>37638.32</aggregateMarketValue>
            <noOfUnitsOutstanding>44125430</noOfUnitsOutstanding>
            <approxSaleDate>05/27/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>05/16/2025</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>214</amountOfSecuritiesAcquired>
            <paymentDate>05/16/2025</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>05/22/2025</saleDate>
            <amountOfSecuritiesSold>380</amountOfSecuritiesSold>
            <grossProceeds>66498.25</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>GARY D MERRILL</name>
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                    <ns2:stateOrCountry>NJ</ns2:stateOrCountry>
                    <ns2:zipCode>07724</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/22/2025</saleDate>
            <amountOfSecuritiesSold>1368</amountOfSecuritiesSold>
            <grossProceeds>239235.84</grossProceeds>
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        <securitiesSoldInPast3Months>
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                    <ns2:stateOrCountry>NJ</ns2:stateOrCountry>
                    <ns2:zipCode>07724</ns2:zipCode>
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            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/20/2025</saleDate>
            <amountOfSecuritiesSold>2302</amountOfSecuritiesSold>
            <grossProceeds>414065.80</grossProceeds>
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        <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>05/20/2025</saleDate>
            <amountOfSecuritiesSold>5551</amountOfSecuritiesSold>
            <grossProceeds>998425.62</grossProceeds>
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        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>GARY D MERRILL</name>
                <address>
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                    <ns2:stateOrCountry>NJ</ns2:stateOrCountry>
                    <ns2:zipCode>07724</ns2:zipCode>
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            <securitiesClassTitle>Common</securitiesClassTitle>
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            <grossProceeds>61513.52</grossProceeds>
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        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>GARY D MERRILL</name>
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                    <ns2:stateOrCountry>NJ</ns2:stateOrCountry>
                    <ns2:zipCode>07724</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/19/2025</saleDate>
            <amountOfSecuritiesSold>9920</amountOfSecuritiesSold>
            <grossProceeds>1743341.79</grossProceeds>
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        <securitiesSoldInPast3Months>
            <sellerDetails>
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                    <ns2:stateOrCountry>NJ</ns2:stateOrCountry>
                    <ns2:zipCode>07724</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
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            <grossProceeds>360129.28</grossProceeds>
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        <securitiesSoldInPast3Months>
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                    <ns2:stateOrCountry>NJ</ns2:stateOrCountry>
                    <ns2:zipCode>07724</ns2:zipCode>
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            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
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            <grossProceeds>256758.84</grossProceeds>
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        <securitiesSoldInPast3Months>
            <sellerDetails>
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                <address>
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                    <ns2:stateOrCountry>NJ</ns2:stateOrCountry>
                    <ns2:zipCode>07724</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/16/2025</saleDate>
            <amountOfSecuritiesSold>45</amountOfSecuritiesSold>
            <grossProceeds>8024.77</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>GARY D MERRILL</name>
                <address>
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                    <ns2:stateOrCountry>NJ</ns2:stateOrCountry>
                    <ns2:zipCode>07724</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/16/2025</saleDate>
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            <grossProceeds>412350.94</grossProceeds>
        </securitiesSoldInPast3Months>
        <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>05/16/2025</saleDate>
            <amountOfSecuritiesSold>1368</amountOfSecuritiesSold>
            <grossProceeds>244197.44</grossProceeds>
        </securitiesSoldInPast3Months>
        <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>
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            <grossProceeds>635127.55</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>05/27/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>11/20/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Gary D Merrill</signature>
        </noticeSignature>
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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
214
37638.32
44125430
05/27/2025
NASDAQ
Common
05/16/2025
Performance Shares
ISSUER
N
214
05/16/2025
Not Applicable
N
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/22/2025
380
66498.25
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/22/2025
1368
239235.84
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/20/2025
2302
414065.80
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/20/2025
5551
998425.62
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/20/2025
342
61513.52
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/19/2025
9920
1743341.79
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/19/2025
2052
360129.28
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/19/2025
1463
256758.84
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/16/2025
45
8024.77
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/16/2025
2310
412350.94
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/16/2025
1368
244197.44
GARY D MERRILL
1 Commvault Way
Tinton Falls
NJ
07724
Common
05/16/2025
3558
635127.55
05/27/2025
11/20/2024
/s/ Gary D Merrill