<SEC-DOCUMENT>0001650578-21-000001.txt : 20210315
<SEC-HEADER>0001650578-21-000001.hdr.sgml : 20210315
<ACCEPTANCE-DATETIME>20210315134410
ACCESSION NUMBER:		0001650578-21-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210312
FILED AS OF DATE:		20210315
DATE AS OF CHANGE:		20210315

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hutto Eric
		CENTRAL INDEX KEY:			0001650578

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08729
		FILM NUMBER:		21740944

	MAIL ADDRESS:	
		STREET 1:		C/O UNISYS CORPORATION
		STREET 2:		801 LAKEVIEW DRIVE, SUITE 100
		CITY:			BLUE BELL
		STATE:			PA
		ZIP:			19422

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNISYS CORP
		CENTRAL INDEX KEY:			0000746838
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER INTEGRATED SYSTEMS DESIGN [7373]
		IRS NUMBER:				380387840
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		801 LAKEVIEW DRIVE, SUITE 100
		CITY:			BLUE BELL
		STATE:			PA
		ZIP:			19422
		BUSINESS PHONE:		2159864011

	MAIL ADDRESS:	
		STREET 1:		801 LAKEVIEW DRIVE, SUITE 100
		CITY:			BLUE BELL
		STATE:			PA
		ZIP:			19422

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BURROUGHS CORP /DE/
		DATE OF NAME CHANGE:	19861204
</SEC-HEADER>
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<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>PRIMARY DOCUMENT
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        <issuerCik>0000746838</issuerCik>
        <issuerName>UNISYS CORP</issuerName>
        <issuerTradingSymbol>UIS</issuerTradingSymbol>
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            <rptOwnerCik>0001650578</rptOwnerCik>
            <rptOwnerName>Hutto Eric</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O UNISYS CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>801 LAKEVIEW DRIVE, SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>BLUE BELL</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19422</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President &amp; COO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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    <derivativeTable>
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            <transactionDate>
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                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
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                    <value>3112</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
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            <expirationDate>
                <footnoteId id="F2"/>
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                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3112</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                </sharesOwnedFollowingTransaction>
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                <value></value>
            </transactionTimeliness>
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                <transactionShares>
                    <value>3112</value>
                </transactionShares>
                <transactionPricePerShare>
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            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
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        </derivativeTransaction>
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    <footnotes>
        <footnote id="F1">Each restricted stock unit represents a contingent right to receive one share of Unisys Corporation common stock.</footnote>
        <footnote id="F2">Time-based restricted stock units (&quot;TB-RSUs&quot;) granted on March 13, 2020 under the Unisys Corporation 2019 Long-Term Incentive and Equity Compensation Plan.  The TB-RSUs vest in three equal installments on March 13, 2021, 2022 and 2023, respectively (or if such date does not fall on a trading day, the immediately preceding trading day).</footnote>
        <footnote id="F3">Each restricted stock unit represents a contingent right to receive 1.5681 shares of Unisys Corporation common stock.</footnote>
        <footnote id="F4">Performance-based restricted stock units (&quot;PB-RSUs&quot;) granted on March 13, 2020 under the Unisys Corporation 2019 Long-Term Incentive and Equity Compensation Plan.  The PB-RSUs are eligible to be earned in equal annual amounts over a three year period based on Unisys Corporation's relative total shareholder return compared to the Russell 2000 Index from January 1, 2020 through December 31, 2020, 2021 and 2022, respectively, and then such PB-RSUs vest on March 13, 2021, 2022 and 2023, respectively (or if such date does not fall on a trading day, the immediately preceding trading day).  This report only relates to the PB-RSUs the reporting person earned during the 2020 performance period.  All shares resulting from such earned PB-RSUs vested on March 12, 2021.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>N. Natasha Redding, attorney-in-fact</signatureName>
        <signatureDate>2021-03-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</DOCUMENT>
</SEC-DOCUMENT>
