-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 MdS1QibM3sTJalhGTGCrSnDplMJy6wcy9fndjrqdYPYUefSgB/JfGtC1VGT+WIfZ
 H61pmMWn5VLqqwGaAROVgg==

<SEC-DOCUMENT>0001245513-03-000002.txt : 20030715
<SEC-HEADER>0001245513-03-000002.hdr.sgml : 20030715
<ACCEPTANCE-DATETIME>20030714192034
ACCESSION NUMBER:		0001245513-03-000002
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030710
FILED AS OF DATE:		20030715

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FORTRESS PRINCIPAL INVESTMENT HOLDINGS LLC
		CENTRAL INDEX KEY:			0001245513
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31458
		FILM NUMBER:		03786119

	BUSINESS ADDRESS:	
		STREET 1:		1251 AVENUE OF THE AMERICA 16 FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10020
		BUSINESS PHONE:		2127986100

	MAIL ADDRESS:	
		STREET 1:		1251 AVENUE OF THE AMERICA 16 FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10020

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NEWCASTLE INVESTMENT CORP
		CENTRAL INDEX KEY:			0001175483
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				810559116
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		C/O FORTRESS
		STREET 2:		1251 AVENUE OF THE AMERICAS 16TH FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10020
		BUSINESS PHONE:		2127986100

	MAIL ADDRESS:	
		STREET 1:		C/O FORTRESS
		STREET 2:		1251 AVENUE OF THE AMERICAS 16TH FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10020
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <documentType>4</documentType>

    <periodOfReport>2003-07-10</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001175483</issuerCik>
        <issuerName>NEWCASTLE INVESTMENT CORP</issuerName>
        <issuerTradingSymbol>NCT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001245513</rptOwnerCik>
            <rptOwnerName>FORTRESS PRINCIPAL INVESTMENT HOLDINGS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeSecurity>
        <securityTitle>
            <value>Right (Option to Buy)</value>
        </securityTitle>
        <conversionOrExercisePrice>
            <value>20.35</value>
        </conversionOrExercisePrice>
        <transactionDate>
            <value>2003-07-10</value>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>J</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
            <footnoteId id="F1"/>
        </transactionCoding>
        <transactionTimeliness>
            <value></value>
        </transactionTimeliness>
        <transactionAmounts>
            <transactionShares>
                <value>460000</value>
            </transactionShares>
            <transactionValue>
                <value>0</value>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>A</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <exerciseDate>
            <value>2003-08-01</value>
            <footnoteId id="F2"/>
        </exerciseDate>
        <expirationDate>
            <value>2013-07-10</value>
        </expirationDate>
        <underlyingSecurity>
            <underlyingSecurityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </underlyingSecurityTitle>
            <underlyingSecurityShares>
                <value>460000</value>
            </underlyingSecurityShares>
        </underlyingSecurity>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
                <value>1160000</value>
            </sharesOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </derivativeSecurity>

    <footnotes>
        <footnote id="F1">Option grant to FPIH (option for a number of shares equal to 10% of shares issued in common stock offering assuming exercise by underwriters' of underwriters' 15% over-allotment option).</footnote>
        <footnote id="F2">The Option is fully vested on the date of grant and is exercisable in thirty equal monthly installments beginning on August 1, 2003.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ R. Nardone</signatureName>
        <signatureDate>2003-07-14</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----