<SEC-DOCUMENT>0001510281-20-000096.txt : 20200406
<SEC-HEADER>0001510281-20-000096.hdr.sgml : 20200406
<ACCEPTANCE-DATETIME>20200406171209
ACCESSION NUMBER:		0001510281-20-000096
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200319
FILED AS OF DATE:		20200406
DATE AS OF CHANGE:		20200406

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Saba Capital Management, L.P.
		CENTRAL INDEX KEY:			0001510281
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-07920
		FILM NUMBER:		20777702

	BUSINESS ADDRESS:	
		STREET 1:		405 LEXINGTON AVENUE
		STREET 2:		58TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10174
		BUSINESS PHONE:		212-542-4635

	MAIL ADDRESS:	
		STREET 1:		405 LEXINGTON AVENUE
		STREET 2:		58TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10174

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Weinstein Boaz
		CENTRAL INDEX KEY:			0001608233

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-07920
		FILM NUMBER:		20777703

	MAIL ADDRESS:	
		STREET 1:		405 LEXINGTON AVENUE
		STREET 2:		58TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10174

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WESTERN ASSET HIGH INCOME OPPORTUNITY FUND INC.
		CENTRAL INDEX KEY:			0000910068
		IRS NUMBER:				133735236
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1031

	BUSINESS ADDRESS:	
		STREET 1:		620 EIGHTH AVENUE
		STREET 2:		49TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10018
		BUSINESS PHONE:		888-777-0102

	MAIL ADDRESS:	
		STREET 1:		620 EIGHTH AVENUE
		STREET 2:		49TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10018

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	HIGH INCOME OPPORTUNITY FUND INC
		DATE OF NAME CHANGE:	19941230

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SMITH BARNEY HIGH INCOME OPPORTUNITY FUND INC
		DATE OF NAME CHANGE:	19930913

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SMITH BARNEY HIGH INCOME FUND INC
		DATE OF NAME CHANGE:	19930802
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-03-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000910068</issuerCik>
        <issuerName>WESTERN ASSET HIGH INCOME OPPORTUNITY FUND INC.</issuerName>
        <issuerTradingSymbol>HIO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001510281</rptOwnerCik>
            <rptOwnerName>Saba Capital Management, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>405 LEXINGTON AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>58TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10174</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001608233</rptOwnerCik>
            <rptOwnerName>Weinstein Boaz</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>405 LEXINGTON AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>58TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10174</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</value>
            </securityTitle>
            <transactionDate>
                <value>2020-03-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2919633</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>3.46</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12912550</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>1</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This Form 4 is being filed to report that as of March 19, 2020, the Reporting Persons ceased to have investment or voting discretion with respect to these shares. The shares were not disposed of in a sale transaction. The price above reflects the closing price on March 19, 2020. The Reporting Person disclaims any pecuniary interest in such shares.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>William Manzolillo</signatureName>
        <signatureDate>2020-04-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Boaz Weinstein</signatureName>
        <signatureDate>2020-04-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
