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

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-11-29</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001373561</issuerCik>
        <issuerName>NewStar Financial, Inc.</issuerName>
        <issuerTradingSymbol>NEWS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001054587</rptOwnerCik>
            <rptOwnerName>OZ MANAGEMENT LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9 WEST 57TH STREET, 39TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2007-11-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>579846</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6894810</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                    <footnoteId id="F6"/>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents securities directly held by OZ Master Fund, Ltd., Fleet Maritime, Inc., GPC LVII, LLC, Goldman Sachs &amp;Company
 Profit Sharing Master Trust, and OZ Global Special Investments Master Fund, LP (the &quot;Funds&quot;).</footnote>
        <footnote id="F2">OZ Management, LP (&quot;OZ&quot;),  as investment manager to OZ Master Fund, Ltd., Fleet Maritime, Inc., GPC LVII, LLC, and Goldman
 Sachs &amp; Company Profit Sharing Master Trust, may be deemed to be the beneficial owner of the Issuer's securities held by the
 Funds.  OZ disclaims beneficial  ownership of such securities, and this report shall not be deemed an admission that OZ is
 the beneficial owner of the securities for the purpose of Section 16 or for any other purpose, except to its  pecuniary
 interest therein.</footnote>
        <footnote id="F3">OZ Advisors II, LP (&quot;OZAII&quot;), as general partner to OZ Global Special Investments Master Fund, LP (&quot;SIMF&quot;), may be deemed to
 be the beneficial owner of the Issuer's securities held by SIMF.  OZAII disclaims beneficial ownership of such securities,
 and this report shall not be deemed an admission that OZAII is the beneficial owner of the securities for the purpose of
 Section 16 or for any other purpose, except to its pecuniary interest therein.</footnote>
        <footnote id="F4">Och-Ziff Holding LLC, as general partner to OZ Advisors II, LP, may be deemed to be the beneficial owner of the Issuer's
 securities held by SIMF.  Och-Ziff Holding LLC disclaims beneficial ownership of such securities, and this report shall not
 be deemed an admission that Och-Ziff Holding LLC is the beneficial owner of the securities for the purpose of Section 16 or
 for any other  purpose, except to its pecuniary interest therein.</footnote>
        <footnote id="F5">Och-Ziff Holding Corporation, as general partner to OZ Management, LP, may be deemed to be the beneficial owner of the
 Issuer's securities held by the Funds other than SIMF.  Och-Ziff Holding Corporation  disclaims beneficial ownership of such
 securities, and this report shall not be deemed an admission that Och-Ziff Holding Corporation is the beneficial owner of
 the securities for the purpose of Section 16 or for any other purpose, except to its pecuniary interest therein.</footnote>
        <footnote id="F6">Och-Ziff Capital Management Group LLC (&quot;OZM&quot;), as the sole shareholder of both Och-Ziff Holding LLC and Och-Ziff Holding
 Corporation, may be deemed to be the beneficial owner of the  Issuer's securities held by the Funds.  OZM disclaims
 beneficial ownership of such securities, and this report shall not be deemed an admission that OZM is the beneficial owner
 of the securities for the purpose of Section 16 or for any other purpose, except to its pecuniary interest therein.</footnote>
        <footnote id="F7">Daniel S. Och, as Chief Executive Officer and Executive Managing Director of Och-Ziff Capital Management Group, LLC, may be
 deemed to be the beneficial owner of the Issuer's securities held by the Funds.  Mr. Och disclaims beneficial ownership of
 such securities, and this report shall not be deemed an admission that Mr. Och is the beneficial owner of the securities for
 the purpose of Section 16 or for any other purpose, except to his pecuniary interest therein.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>OZ MANAGEMENT, LP, By Och-Ziff Holding Corporation, its general partner; By Och-Ziff Capital Management Group, LLC its sole shareholder; By: /s/ Daniel S. Och Chief Executive Officer, Executive Managing Director and Chairman of the Board of Directors</signatureName>
        <signatureDate>2007-12-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OZ ADVISORS II, LP, By Och-Ziff Holding LLC, its general partner; By Och-Ziff Capital Management  Group, LLC its sole shareholder; By: /s/ Daniel S. Och Chief Executive Officer, Executive Managing Director and Chairman of the Board of Directors</signatureName>
        <signatureDate>2007-12-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OCH-ZIFF HOLDING CORPORATION, By Och-Ziff Capital Management Group LLC, its sole shareholder; By: /s/ Daniel S. Och Chief Executive Officer, Executive Managing Director and Chairman of the Board of Directors</signatureName>
        <signatureDate>2007-12-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OCH-ZIFF HOLDING LLC, By Och-Ziff Capital Management Group LLC, its sole shareholder; By: /s/ Daniel S. Och, Chief Executive Officer, Executive Managing Director and Chairman of the Board of Directors</signatureName>
        <signatureDate>2007-12-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OCH-ZIFF CAPITAL MANAGEMENT GROUP LLC, By: /s/ Daniel S. Och, Chief Executive Officer, Executive Managing Director and Chairman of the Board of Directors</signatureName>
        <signatureDate>2007-12-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>By: /s/ DANIEL S. OCH</signatureName>
        <signatureDate>2007-12-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
