<SEC-DOCUMENT>0001013857-21-000074.txt : 20210309
<SEC-HEADER>0001013857-21-000074.hdr.sgml : 20210309
<ACCEPTANCE-DATETIME>20210309164942
ACCESSION NUMBER:		0001013857-21-000074
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210305
FILED AS OF DATE:		20210309
DATE AS OF CHANGE:		20210309

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Trefler Leon
		CENTRAL INDEX KEY:			0001480560

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-11859
		FILM NUMBER:		21726604

	MAIL ADDRESS:	
		STREET 1:		101 MAIN STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PEGASYSTEMS INC
		CENTRAL INDEX KEY:			0001013857
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				042787865
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE ROGERS STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142-1209
		BUSINESS PHONE:		6173749600

	MAIL ADDRESS:	
		STREET 1:		ONE ROGERS STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142-1209
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>FORM 4
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        <issuerName>PEGASYSTEMS INC</issuerName>
        <issuerTradingSymbol>PEGA</issuerTradingSymbol>
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            <rptOwnerName>Trefler Leon</rptOwnerName>
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            <rptOwnerStreet1>C/O PEGASYSTEMS INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1 ROGERS STREET</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02142</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP, Global Customer Success</officerTitle>
            <otherText></otherText>
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                <footnoteId id="F5"/>
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    <footnotes>
        <footnote id="F1">Represents a 5% vesting on March 5, 2021. The original grant was 7,246 restricted stock units, with 20% vesting on March 5, 2019, and the remaining 80% vesting in equal quarterly installments over the remaining four years.</footnote>
        <footnote id="F2">Represents a 5% vesting on March 6, 2021, with a release date on March 8, 2021, the first business day following the vesting. The original grant was 7,806 restricted stock units, with 20% vesting on March 6, 2020, and the remaining 80% vesting in equal quarterly installments over the remaining four years.</footnote>
        <footnote id="F3">Represents a 5% vesting on March 9, 2021. The original grant was 12,049 restricted stock units, with 20% vesting on March 9, 2017, and the remaining 80% vesting in equal quarterly installments over the remaining four years</footnote>
        <footnote id="F4">Does not include shares of common stock subject to unvested restricted stock units and/or options awards.</footnote>
        <footnote id="F5">Each restricted stock unit represents the right to receive, following vesting, one share of the issuer's common stock.</footnote>
        <footnote id="F6">Once vested, shares of common stock are not subject to expiration.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Donald L. Lancaster, Attorney-in-Fact for Leon Trefler</signatureName>
        <signatureDate>2021-03-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</DOCUMENT>
</SEC-DOCUMENT>
