<SEC-DOCUMENT>0001181431-13-058640.txt : 20131113
<SEC-HEADER>0001181431-13-058640.hdr.sgml : 20131113
<ACCEPTANCE-DATETIME>20131113145123
ACCESSION NUMBER:		0001181431-13-058640
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20131112
FILED AS OF DATE:		20131113
DATE AS OF CHANGE:		20131113

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EATON VANCE SENIOR FLOATING RATE TRUST
		CENTRAL INDEX KEY:			0001258623
		IRS NUMBER:				000000000

	BUSINESS ADDRESS:	
		STREET 1:		TWO INTERNATIONAL PLACE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		617-482-8260

	MAIL ADDRESS:	
		STREET 1:		TWO INTERNATIONAL PLACE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	EATON VANCE SENIOR FLOATING RATE FUND
		DATE OF NAME CHANGE:	20030806

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			UBS AG
		CENTRAL INDEX KEY:			0001114446
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		STATE OF INCORPORATION:			V8
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21411
		FILM NUMBER:		131214106

	BUSINESS ADDRESS:	
		STREET 1:		BAHNHOFSTRASSE 45
		STREET 2:		P O BOX CH 8001
		CITY:			ZURICH
		STATE:			V8
		ZIP:			CH 8001
		BUSINESS PHONE:		203-719-5241

	MAIL ADDRESS:	
		STREET 1:		677 WASHINGTON BLVD.
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06901
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd395311.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2013-11-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001258623</issuerCik>
        <issuerName>EATON VANCE SENIOR FLOATING RATE TRUST</issuerName>
        <issuerTradingSymbol>EFR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001114446</rptOwnerCik>
            <rptOwnerName>UBS AG</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>BAHNHOFSTRASSE 45</rptOwnerStreet1>
            <rptOwnerStreet2>PO BOX CH-8021</rptOwnerStreet2>
            <rptOwnerCity>ZURICH</rptOwnerCity>
            <rptOwnerState>V8</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>SWITZERLAND</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Auction Preferred Stock</value>
                <footnoteId id="F4"/>
            </securityTitle>
            <transactionDate>
                <value>2013-11-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2831</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By subsidiary -</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This Statement is filed jointly by UBS AG for the benefit and on behalf of UBS Securities LLC and UBS Financial Services Inc., two wholly owned subsidiaries of UBS AG to which UBS AG has delegated portions of its performance obligations with respect to the Auction Rate Securities Rights issued by UBS AG to certain clients and pursuant to which the securities reported herein have been purchased from such clients.</footnote>
        <footnote id="F2">This filing reports holdings of the Series of Auction Preferred Stock identified in Item 1 of this Table I on an aggregated basis.</footnote>
        <footnote id="F3">At Par</footnote>
        <footnote id="F4">(Cusip Nos. 27828Q204, 27828Q303, 27828Q402, 27828Q501)</footnote>
    </footnotes>

    <remarks>The Shares reported herein represent UBS AG's combined holdings in multiple series of auction preferred securities of the issuer, which are treated herein as one class of securities.</remarks>

    <ownerSignature>
        <signatureName>/s/ Anthony DeFilippis</signatureName>
        <signatureDate>2013-11-13</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ William Chandler</signatureName>
        <signatureDate>2013-11-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
