-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 xYORTiL26pdRgvXW9ZuJtw==

<SEC-DOCUMENT>0000931017-08-000010.txt : 20080515
<SEC-HEADER>0000931017-08-000010.hdr.sgml : 20080515
<ACCEPTANCE-DATETIME>20080515161846
ACCESSION NUMBER:		0000931017-08-000010
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080515
FILED AS OF DATE:		20080515
DATE AS OF CHANGE:		20080515

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Winthrop Realty Trust
		CENTRAL INDEX KEY:			0000037008
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				346513657
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		7 BULFINCH PLACE
		STREET 2:		SUITE 500 PO BOX 9507
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02114
		BUSINESS PHONE:		6175704614

	MAIL ADDRESS:	
		STREET 1:		7 BULFINCH PLACE
		STREET 2:		SUITE 500 PO BOX 9507
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02114

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRST UNION REAL ESTATE EQUITY & MORTGAGE INVESTMENTS
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRST UNION REALTY
		DATE OF NAME CHANGE:	19691012

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WEM FUR INVESTORS LLC
		CENTRAL INDEX KEY:			0001274894
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06249
		FILM NUMBER:		08837950

	MAIL ADDRESS:	
		STREET 1:		100 JERICHO QUADRANGLE
		STREET 2:		STE 214
		CITY:			JERICHO
		STATE:			NY
		ZIP:			11753

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FUR INVESTORS LLC
		CENTRAL INDEX KEY:			0001271267
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06249
		FILM NUMBER:		08837951

	BUSINESS ADDRESS:	
		STREET 1:		TWO JERICHO PLAZA
		STREET 2:		WING A, SUITE 111
		CITY:			JERICHO
		STATE:			NY
		ZIP:			11753
		BUSINESS PHONE:		6175704600

	MAIL ADDRESS:	
		STREET 1:		7 BULFINCH PLACE
		STREET 2:		SUITE 500
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02114

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FUR HOLDINGS LLC
		CENTRAL INDEX KEY:			0001275105
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06249
		FILM NUMBER:		08837952

	BUSINESS ADDRESS:	
		STREET 1:		TWO JERICHO PLAZA
		STREET 2:		WING A, SUITE 111
		CITY:			JERICHO
		STATE:			NY
		ZIP:			11753
		BUSINESS PHONE:		6175704600

	MAIL ADDRESS:	
		STREET 1:		7 BULFINCH PLACE
		STREET 2:		SUITE 500
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02114

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ASHNER MICHAEL L
		CENTRAL INDEX KEY:			0001139233

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06249
		FILM NUMBER:		08837953

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		5168220022

	MAIL ADDRESS:	
		STREET 1:		C/O WINTHROP FINANCIAL ASSOCIATES
		STREET 2:		TWO JERICHO PLAZA WING A
		CITY:			JERICHO
		STATE:			NY
		ZIP:			11753
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-05-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000037008</issuerCik>
        <issuerName>Winthrop Realty Trust</issuerName>
        <issuerTradingSymbol>FUR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001139233</rptOwnerCik>
            <rptOwnerName>ASHNER MICHAEL L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O WINTHROP REALTY PARTNERS, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>TWO JERICHO PLAZA WING A</rptOwnerStreet2>
            <rptOwnerCity>JERICHO</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>11753</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chairman and CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001275105</rptOwnerCik>
            <rptOwnerName>FUR HOLDINGS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>7 BULFINCH PLACE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 500</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02114</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001271267</rptOwnerCik>
            <rptOwnerName>FUR INVESTORS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>7 BULFINCH PLACE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 500</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02114</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001274894</rptOwnerCik>
            <rptOwnerName>WEM FUR INVESTORS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TWO JERICHO PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2>WING A, SUITE 111</rptOwnerStreet2>
            <rptOwnerCity>JERICHO</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>11753</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares of Beneficial Interest</value>
            </securityTitle>
            <transactionDate>
                <value>2008-05-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1115268</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.27</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12268782</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>see</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares acquired in connection with the exercise of basic subscription rights in the Issuer's rights offering.  1,110,000 by FUR Investors LLC and 5,268 by Michael L. Ashner which represents 100% of the basic subscription rights issued to each of them.</footnote>
        <footnote id="F2">Shares are comprised of (i) 58,782 shares held directly by Michael L. Ashner and (ii) 12,210,000 shares held by FUR Investors LLC. Michael L. Ashner is the managing member of WEM-FUR Investors LLC, which is the managing member and holds a 35.591%ownership interest in FUR Holdings LLC, which is the sole member of FUR Investors LLC.  Accordingly, for purposes of Section 16 of the Act, Holdings, WEM and Mr. Ashner may be deemed to own a 100%, 35.591% and 25.84% beneficial interest, respectively, in any securities reported herein which are held by FUR Investors LLC..  Mr. Ashner disclaims beneficial ownership of 9,054,936 shares owned by FUR Investors LLC.</footnote>
    </footnotes>

    <remarks>This statement is filed as a joint report pursuant to Rule 16a-3(j) promulgated under the Securities Exchange Act of 1934 (the &quot;Act&quot;) by the undersigned Reporting Person and by the entities listed on the attached Joint Filer Information Sheet who are deemed to constitute a &quot;group&quot; beneficially owning more than 10% of the Issuer's shares of beneficial interest, par value $1.00 per share under Section 13(d) of the Act</remarks>

    <ownerSignature>
        <signatureName>Michael L. Ashner</signatureName>
        <signatureDate>2008-05-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>FUR Investors LLC</signatureName>
        <signatureDate>2008-05-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>FUR Holdings LLC</signatureName>
        <signatureDate>2008-05-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>WEM-FUR Investors LLC</signatureName>
        <signatureDate>2008-05-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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