<SEC-DOCUMENT>0001643526-18-000006.txt : 20180212
<SEC-HEADER>0001643526-18-000006.hdr.sgml : 20180212
<ACCEPTANCE-DATETIME>20180212215808
ACCESSION NUMBER:		0001643526-18-000006
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180209
FILED AS OF DATE:		20180212
DATE AS OF CHANGE:		20180212

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Thomson Michael M
		CENTRAL INDEX KEY:			0001561637

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08729
		FILM NUMBER:		18598888

	MAIL ADDRESS:	
		STREET 1:		875 THIRD AVENUE
		STREET 2:		16TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

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>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
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        <issuerName>UNISYS CORP</issuerName>
        <issuerTradingSymbol>UIS</issuerTradingSymbol>
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            <rptOwnerName>Thomson Michael M</rptOwnerName>
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            <rptOwnerStreet2>16TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
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            <rptOwnerZipCode>10022</rptOwnerZipCode>
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                <directOrIndirectOwnership>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
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                    <value>A</value>
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                <footnoteId id="F7"/>
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                    <value>Common Stock</value>
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                <underlyingSecurityShares>
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                    <value>999</value>
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    <footnotes>
        <footnote id="F1">Each restricted stock unit represents a contingent right to receive 0.868 shares of Unisys Corporation common stock.</footnote>
        <footnote id="F2">Performance-based restricted stock units (&quot;PB-RSUs&quot;) granted on February 11, 2016 under the Unisys Corporation 2010 Long-Term Incentive and Equity Compensation Plan. The PB-RSUs are earned one-third annually over a three-year period to the extent Unisys Corporation achieves a performance goal relating to operating profit for that year in each of 2015, 2016, and 2017, respectively, and then such earned PB-RSUs vest on February 11, 2017, 2018 and 2019, 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 based on the 2017 performance goal. All shares resulting from such earned PB-RSUs vested on February 9, 2018.</footnote>
        <footnote id="F3">Each restricted stock unit represents a contingent right to receive 1.309 shares of Unisys Corporation common stock.</footnote>
        <footnote id="F4">Time-based restricted stock units granted under the Unisys Corporation 2016 Long-Term Incentive and Equity Compensation Plan. The restricted stock units will vest in three equal annual installments beginning February 9, 2018.</footnote>
        <footnote id="F5">Each restricted stock unit represents a contingent right to receive one share of Unisys Corporation common stock.</footnote>
        <footnote id="F6">Each restricted stock unit represents a contingent right to receive one share of Unisys Corporation common stock.</footnote>
        <footnote id="F7">Performance-based restricted stock granted on  February 9, 2017 under the Unisys Corporation 2016 Long-Term Incentive and Equity COmpensation Plan. The PB-RSUS are earned one-third annually over a three-year period to the extend that the Unisys Corporation achieves a performance goal related to operating profit for that year in each of 2017, 2018 and 2019, respectively. This report only relates to the PB-RSUS the reporting person earned based on the 2017 performance goal. All shares resulting from such earned PB-RSUs vested on February 9, 2018.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>John Armbruster, attorney in fact</signatureName>
        <signatureDate>2018-02-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
