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



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        <issuerInfo>
            <issuerCik>0001819994</issuerCik>
            <issuerName>ROCKET LAB USA, INC.</issuerName>
            <secFileNumber>001-39560</secFileNumber>
            <issuerAddress>
                <ns2:street1>3881 McGowen Street</ns2:street1>
                <ns2:city>Long Beach</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>90808</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>7144655737</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>FRANK KLEIN</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>1835</noOfUnitsSold>
            <aggregateMarketValue>34516.35</aggregateMarketValue>
            <noOfUnitsOutstanding>453545095</noOfUnitsOutstanding>
            <approxSaleDate>03/17/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/13/2025</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1835</amountOfSecuritiesAcquired>
            <paymentDate>03/13/2025</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>FRANK KLEIN</name>
                <address>
                    <ns2:street1>3881 McGowen Street</ns2:street1>
                    <ns2:city>Long Beach</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>90808</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>03/14/2025</saleDate>
            <amountOfSecuritiesSold>44553</amountOfSecuritiesSold>
            <grossProceeds>810031.46</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>03/17/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>12/13/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Frank Klein</signature>
        </noticeSignature>
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144
0002037530
XXXXXXXX
LIVE
0001819994
ROCKET LAB USA, INC.
001-39560
3881 McGowen Street
Long Beach
CA
90808
7144655737
FRANK KLEIN
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
1835
34516.35
453545095
03/17/2025
NASDAQ
Common
03/13/2025
Restricted Stock Units
Issuer
N
1835
03/13/2025
N/A
N
FRANK KLEIN
3881 McGowen Street
Long Beach
CA
90808
Common
03/14/2025
44553
810031.46
03/17/2025
12/13/2024
/s/ Frank Klein