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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2020-02-12</periodOfReport>

    <dateOfOriginalSubmission>2020-02-24</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001715768</issuerCik>
        <issuerName>Transphorm, Inc.</issuerName>
        <issuerTradingSymbol>NONE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001803963</rptOwnerCik>
            <rptOwnerName>Nexperia B.V.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>JONKERBOSPLEIN 52</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>AB NIJMEGEN</rptOwnerCity>
            <rptOwnerState>P7</rptOwnerState>
            <rptOwnerZipCode>6534</rptOwnerZipCode>
            <rptOwnerStateDescription>NETHERLANDS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001804433</rptOwnerCik>
            <rptOwnerName>Wingtech Technology Co. Ltd.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4F-6F, BUILDING 4 OF JUXIN YUAN, NO. 188</rptOwnerStreet1>
            <rptOwnerStreet2>PINGFU ROAD, XUHUI DISTRICT</rptOwnerStreet2>
            <rptOwnerCity>SHANGHAI</rptOwnerCity>
            <rptOwnerState>F4</rptOwnerState>
            <rptOwnerZipCode>200231</rptOwnerZipCode>
            <rptOwnerStateDescription>CHINA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4000000</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Wingtech Technology Co. Ltd. (&quot;Wingtech&quot;) owns 80% of the equity of Nexperia B.V. (&quot;Nexperia&quot;), and Wingtech indirectly beneficially owns the shares of common stock of Transphorm, Inc. directly held by Nexperia. Wingtech disclaims beneficial ownership of the reported securities except to the extent of its pecuniary interest therein, and this report shall not be deemed an admission that Wingtech is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act of 1934 or any other purpose.</footnote>
    </footnotes>

    <remarks>Exhibit 24 - Power of Attorney
This Form 3 amendment is being filed solely to add a reporting person, Wingtech Technology Co. Ltd., to the original Form 3 filed on February 24, 2020.</remarks>

    <ownerSignature>
        <signatureName>/s/ Caterina Benson by Power of Attorney for Nexperia B.V.</signatureName>
        <signatureDate>2020-02-25</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Caterina Benson by Power of Attorney for Wingtech Technology Co. Ltd.</signatureName>
        <signatureDate>2020-02-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
