<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-12-29</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001843388</issuerCik>
        <issuerName>Virgin Orbit Holdings, Inc.</issuerName>
        <issuerTradingSymbol>VORB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001007706</rptOwnerCik>
            <rptOwnerName>VON RICKENBACH JOSEF H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O NEXTGEN ACQUISITION CORP. II</rptOwnerStreet1>
            <rptOwnerStreet2>2255 GLADES ROAD, SUITE 324A</rptOwnerStreet2>
            <rptOwnerCity>BOCA RATON,</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33431</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>FORMER DIRECTOR</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-12-29</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>125000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>125000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Reflects Issuer's common stock acquired from the Issuer pursuant to a Subscription Agreement in connection with the business combination of NextGen Acquisition Corp. II (the former name of the Issuer) and Virgin Orbit Holdings, Inc. (formerly known as Virgin Orbit) (such business combination, the &quot;Business Combination&quot;), which closed on December 29, 2021. The reporting person resigned as a director of the Issuer upon consummation of the Business Combination.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By /s/ Patrick T. Ford as attorney-in-fact for Josef H. Von Rickenbach</signatureName>
        <signatureDate>2021-12-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
