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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2020-09-28</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001824963</issuerCik>
        <issuerName>Ajax I</issuerName>
        <issuerTradingSymbol>AJAX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001825971</rptOwnerCik>
            <rptOwnerName>Ajax I Holdings, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AJAX I</rptOwnerStreet1>
            <rptOwnerStreet2>667 MADISON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10065</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001417561</rptOwnerCik>
            <rptOwnerName>Och Daniel</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AJAX I</rptOwnerStreet1>
            <rptOwnerStreet2>667 MADISON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10065</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001830190</rptOwnerCik>
            <rptOwnerName>OW667 Holdings I, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AJAX I</rptOwnerStreet1>
            <rptOwnerStreet2>667 MADISON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10065</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001830194</rptOwnerCik>
            <rptOwnerName>OW667 Management, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AJAX I</rptOwnerStreet1>
            <rptOwnerStreet2>667 MADISON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10065</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Class B ordinary shares</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A ordinary shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>9583333</value>
                    <footnoteId id="F1"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">As described in the issuer's registration statement on Form S-1 (File No. 333-249411) under the heading &quot;Description of Securities-Founder Shares,&quot; the Class B ordinary shares, par value $0.0001 per share, of the issuer will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the issuer at the time of the issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis, subject to certain adjustment, and have no expiration date. Includes 1,250,000 Class B ordinary shares that are subject to forfeiture if the underwriter of the issuer's initial public offering does not exercise in full its option to purchase additional units.</footnote>
        <footnote id="F2">Ajax I Holdings, LLC (the &quot;Sponsor&quot;) is the record holder of the Class B ordinary shares reported herein. OW667 Management, LLC (&quot;OW667 Management&quot;), a Delaware limited liability company is the managing member and may be deemed to beneficially own securities held by the Sponsor by virtue of its control over the Sponsor. Mr. Och is the (i) managing member of OW667 Management and (ii) managing member of OW667 Holdings I, LLC (&quot;OW667 Holdings&quot;), a Delaware limited liability company and member of OW667 Management, and may be deemed to beneficially own securities held by the Sponsor by virtue of his control over OW667 Management and OW667 Holdings. Each of the Sponsor, OW667 Management and OW667 Holdings may be deemed to be a beneficial owner of Class B ordinary shares reported herein. Each of Mr. Och , OW667 Management and OW667 Holdings disclaims beneficial ownership of the Class B ordinary shares reported herein except to the extent of his or its respective pecuniary interest therein.</footnote>
    </footnotes>

    <remarks>Mr. Och (i) is the Chief Executive Officer and (ii) serves on the board of directors, of the issuer. For the purposes of Section 16 of the Securities Exchange Act of 1934, as amended, the Sponsor, OW667 Holdings and OW667 Management may each be deemed a director by deputization with respect to the issuer on the basis of the service of Mr. Och.</remarks>

    <ownerSignature>
        <signatureName>/s/ Daniel S. Och, Authorized Signatory</signatureName>
        <signatureDate>2020-10-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Daniel S. Och</signatureName>
        <signatureDate>2020-10-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Daniel S. Och, Authorized Signatory</signatureName>
        <signatureDate>2020-10-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Daniel S. Och, Authorized Signatory</signatureName>
        <signatureDate>2020-10-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
