    <SEC-DOCUMENT>0001013857-21-000104-index.html : 20210429
    <SEC-HEADER>0001013857-21-000104.hdr.sgml : 20210429
    <ACCEPTANCE-DATETIME>20210429172611
    ACCESSION NUMBER:		0001013857-21-000104
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20210429
    DATE AS OF CHANGE:		20210429

    FILER:

    	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

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-11859
    		FILM NUMBER:		21872267

    	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>DEFA14A
    <SEQUENCE>1
    <FILENAME>a2021_defa14a.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: a2021_defa14a.htm

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    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>noticefordefa14a_pagex11.jpg
    <TEXT>
    Document 2 - file: noticefordefa14a_pagex11.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>noticefordefa14a_pagex21.jpg
    <TEXT>
    Document 3 - file: noticefordefa14a_pagex21.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>