<SEC-DOCUMENT>0001013857-22-000104.txt : 20220603
<SEC-HEADER>0001013857-22-000104.hdr.sgml : 20220603
<ACCEPTANCE-DATETIME>20220603171703
ACCESSION NUMBER:		0001013857-22-000104
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20220601
FILED AS OF DATE:		20220603
DATE AS OF CHANGE:		20220603

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Higgins John Gerard
		CENTRAL INDEX KEY:			0001915414

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-11859
		FILM NUMBER:		22995723

	MAIL ADDRESS:	
		STREET 1:		C/O PEGASYSTEMS INC.
		STREET 2:		1 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 MAIN STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142-1531
		BUSINESS PHONE:		6173749600

	MAIL ADDRESS:	
		STREET 1:		ONE MAIN STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142-1531
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>FORM 4
<TEXT>
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    <periodOfReport>2022-06-01</periodOfReport>

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    <issuer>
        <issuerCik>0001013857</issuerCik>
        <issuerName>PEGASYSTEMS INC</issuerName>
        <issuerTradingSymbol>PEGA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001915414</rptOwnerCik>
            <rptOwnerName>Higgins John Gerard</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PEGASYSTEMS INC. ONE MAIN STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02142</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief, Client &amp;Partner Success</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <transactionCode>M</transactionCode>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
                <footnoteId id="F4"/>
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            <transactionDate>
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                    <value>461</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            <exerciseDate>
                <value>2021-06-01</value>
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            <expirationDate>
                <footnoteId id="F5"/>
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                <underlyingSecurityTitle>
                    <value>Common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>461.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                    <value>6902</value>
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                <transactionPricePerShare>
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            <expirationDate>
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                <sharesOwnedFollowingTransaction>
                    <value>1381</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
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    <footnotes>
        <footnote id="F1">Represents a 5% vesting on June 1, 2022. The original grant was 9,207 restricted stock units with 5% vesting on June 1, 2021, with the remaining 95% vesting in 5% quarterly installments.</footnote>
        <footnote id="F2">Represents a 5% vesting on June 1, 2022. The original grant was 1,842 restricted stock units with 20% vesting on March 1, 2022 with the remaining 80% vesting in 5% equal quarterly installments over the remaining four years.</footnote>
        <footnote id="F3">Does not include shares of common stock subject to unvested restricted stock units and/or options awards. Includes shares acquired on March 31, 2022 pursuant to the company's employee stock purchase plan.</footnote>
        <footnote id="F4">Each restricted stock unit represents the right to receive, following vesting, one share of the issuer's common stock.</footnote>
        <footnote id="F5">Once vested, the shares of common stock are not subject to expiration.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>s/ Jenna L. Burstyn, Attorney-in-Fact for John Gerard Higgins</signatureName>
        <signatureDate>2022-06-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
