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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2022-10-03</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001794621</issuerCik>
        <issuerName>Quanergy Systems, Inc.</issuerName>
        <issuerTradingSymbol>QNGY</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001940719</rptOwnerCik>
            <rptOwnerName>GEM Global Yield LLC SCS</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>12C, RUE GUILLAUME J. KROLL</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LUXEMBOURG</rptOwnerCity>
            <rptOwnerState>N4</rptOwnerState>
            <rptOwnerZipCode>L-1882</rptOwnerZipCode>
            <rptOwnerStateDescription>LUXEMBOURG</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001940717</rptOwnerCik>
            <rptOwnerName>GEM Global Yield Fund LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9 WEST 57TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A ordinary shares, $0.0001 par value per share</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>13716850</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Consists of ordinary shares held directly by GEM Global Yield LLC SCS (&quot;GEM Investor&quot;). GEM Global Yield Fund LLC (&quot;GEM GP&quot;) is the general partner of GEM Investor and Christopher F. Brown is the beneficial sole owner of GEM GP.  In such capacities, GEM GP and Mr. Bown may be deemed to have indirect voting and dispositive power over the shares held by GEM Investor.  GEM GP and Mr. Brown each disclaim beneficial ownership of the shares held by GEM Investor, except to the extent, if any, that they have a pecuniary interest in such shares.

Exhibit List:</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>GEM Global Yield LLC SCS
/s/  Christopher F. Brown</signatureName>
        <signatureDate>2022-10-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>GEM Global Yield Fund LLC
/s/  Christopher F. Brown</signatureName>
        <signatureDate>2022-10-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Christopher F. Brown
/s/ Christopher F. Brown</signatureName>
        <signatureDate>2022-10-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
