-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 W0afzV9a/fUXa8CSmE39rsAFP5HxmEGa+gKVZJ5H56UvdDOQBO/FlELvbNyfSiZ+
 i4v7NsIy/q5QV/m94xk/4g==

<SEC-DOCUMENT>0001237268-04-000002.txt : 20041123
<SEC-HEADER>0001237268-04-000002.hdr.sgml : 20041123
<ACCEPTANCE-DATETIME>20041123150420
ACCESSION NUMBER:		0001237268-04-000002
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20041101
FILED AS OF DATE:		20041123
DATE AS OF CHANGE:		20041123

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KRA DOUGLAS I
		CENTRAL INDEX KEY:			0001237268

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-11859
		FILM NUMBER:		041163583

	BUSINESS ADDRESS:	
		STREET 1:		ELOYALTY
		STREET 2:		150 FIELD DRIVE STE 250
		CITY:			LAKE FOREST
		STATE:			IL
		ZIP:			60045
		BUSINESS PHONE:		8774717500

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:		101 MAIN ST
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142-1590
		BUSINESS PHONE:		6173749600

	MAIL ADDRESS:	
		STREET 1:		101 MAIN ST
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142-1590
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2004-11-01</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001237268</rptOwnerCik>
            <rptOwnerName>KRA DOUGLAS I</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PEGASYSTEMS INC.</rptOwnerStreet1>
            <rptOwnerStreet2>101 MAIN STREET</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>Vice President Global Services</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>7.21</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2005-02-01</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2014-11-01</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>80000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">All options vest on a five year quarterly vesting schedule beginning on the date of the grant, with the first vesting date occurring on February 1, 2005.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Shawn Hoyt, Esq., as Attorney-in-Fact for Douglas I. Kra</signatureName>
        <signatureDate>2004-11-23</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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