<SUBMISSION>
<ACCESSION-NUMBER>0001299933-05-001294
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20050314
<ITEMS>7.01
<FILING-DATE>20050317
<DATE-OF-FILING-DATE-CHANGE>20050317
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>PEGASYSTEMS INC
<CIK>0001013857
<ASSIGNED-SIC>7374
<IRS-NUMBER>042787865
<STATE-OF-INCORPORATION>MA
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>001-11859
<FILM-NUMBER>05689354
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>101 MAIN ST
<CITY>CAMBRIDGE
<STATE>MA
<ZIP>02142-1590
<PHONE>6173749600
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>101 MAIN ST
<CITY>CAMBRIDGE
<STATE>MA
<ZIP>02142-1590
</MAIL-ADDRESS>
</FILER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>htm_3701.htm
<DESCRIPTION>LIVE FILING
<TEXT>
<!-- CoverPageHeader start -->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<TITLE> Pegasystems Inc.  (Form: 8-K) </TITLE>
</HEAD>
<BODY TEXT="#000000" BGCOLOR="#FFFFFF" ALINK="#0000FF" HLINK="#FF0000" VLINK="#800080">
<A NAME="DOCUMENT_TOP">&nbsp;</A>
<P>
<!-- CoverPageHeader end --><!-- CoverPageTitle START -->
<A NAME="DOCUMENT_TOP">&nbsp;</A>
<HR NOSHADE>
<P>
<P ALIGN="CENTER">
<FONT SIZE="4">
		UNITED STATES<BR>
	SECURITIES AND EXCHANGE COMMISSION
</FONT>
<BR>
<FONT SIZE="2">
	WASHINGTON, D.C. 20549
</FONT>
<P ALIGN="CENTER">
<FONT SIZE="5">
	FORM 8-K
</FONT>
<FONT SIZE="2">

</FONT>
</P>
<P ALIGN="CENTER">
<FONT SIZE="3">
	CURRENT REPORT
</FONT>
</P>
<P ALIGN="CENTER">
<FONT SIZE="2">
	Pursuant to Section&nbsp;13 or 15(d) of the Securities Exchange Act of 1934
</FONT>
</P>
<CENTER>
<TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
<TR VALIGN="BOTTOM">
<TD WIDTH="51%">
	&nbsp;
</TD>
<TD WIDTH="5%">
	&nbsp;
</TD>
<TD WIDTH="44%">
	&nbsp;
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	Date of Report (Date of Earliest Event Reported):
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	March 14, 2005
</FONT>
</TD>
</TR>
</TABLE>
<BR>
</CENTER>
<!-- CoverPageTitle END --><!-- CoverPageRegistrant START -->
<P ALIGN="CENTER"><!-- -->
<FONT SIZE="6">
	Pegasystems Inc.
</FONT>
<FONT SIZE="2">
<BR>__________________________________________<BR>
	(Exact name of registrant as specified in its charter)
</FONT>
<CENTER>
<TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
<TR VALIGN="BOTTOM">
<TD WIDTH="33%">
	&nbsp;
</TD>
<TD WIDTH="34%">
	&nbsp;
</TD>
<TD WIDTH="33%">
	&nbsp;
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	Massachusetts
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	1-11859
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	04-2787865
</FONT>
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
_____________________<BR>
	(State or other jurisdiction
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
_____________<BR>
	(Commission
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
______________<BR>
	(I.R.S. Employer
</FONT>
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	of incorporation)
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	File Number)
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	Identification No.)
</FONT>
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;&nbsp;
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	101 Main Street, Cambridge, Massachusetts
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	02142
</FONT>
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
_________________________________<BR>
	(Address of principal executive offices)
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
___________<BR>
	(Zip Code)
</FONT>
</TD>
</TR>
</TABLE>
</CENTER>
<CENTER>
<TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">

<TR VALIGN="BOTTOM">
<TD WIDTH="51%">
	&nbsp;
</TD>
<TD WIDTH="5%">
	&nbsp;
</TD>
<TD WIDTH="44%">
	&nbsp;
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	Registrant&#146;s telephone number, including area code:
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="CENTER" VALIGN="TOP">
<FONT SIZE="2">
	617-374-9600
</FONT>
</TD>
</TR>
</TABLE>
</CENTER>
<P ALIGN="CENTER">
<FONT SIZE="2">
	Not Applicable
<BR>______________________________________________<BR>
	Former name or former address, if changed since last report
</FONT>
<P ALIGN="CENTER">
<FONT SIZE="2">
	&nbsp;
</FONT>
<!-- CoverPageRegistrant END --><P><FONT SIZE="2">
Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any
of the following provisions:</FONT>
</P>
<P><FONT SIZE="2">
[&nbsp;&nbsp;]&nbsp;&nbsp;Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)<br>
[&nbsp;&nbsp;]&nbsp;&nbsp;Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)<br>
[&nbsp;&nbsp;]&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))<br>
[&nbsp;&nbsp;]&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))<br>
</P></FONT><!-- PageBreak START -->
<P>
<HR NOSHADE>
<DIV ALIGN="LEFT" STYLE="PAGE-BREAK-BEFORE:ALWAYS">
<A HREF="#DOCUMENT_TOP">
<U>
<B>
<FONT SIZE="2">Top of the Form</FONT>
</B>
</U>
</A>
</DIV>
<!-- PageBreak END --><!-- Item START -->
<P ALIGN="LEFT">
<FONT SIZE="2">
<B>
	Item 7.01. Regulation FD Disclosure.
</B>
</FONT>
</P>
<P ALIGN="LEFT">
<FONT SIZE="2">
On March 14, 2005, Pegasystems Inc. established a pre-arranged stock repurchase plan (the "10b5-1 Plan"), intended to comply with the requirements of Rule 10b5-1 under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and of Rule 10b-18 of the Exchange Act. The Company&#x2019;s 10b5-1 Plan commences on June 15, 2005 and expires on September 30, 2005, subject to conditions specified in the plan.   <br><br>The Company established this 10b5-1 Plan in connection with the stock repurchase program that was announced by the Company in a press release dated October 28, 2004. Any actual repurchases under the 10b5-1 Plan or the stock repurchase program will be disclosed in the Company&#x2019;s quarterly reports on Form 10-Q as filed with the Securities and Exchange Commission.  <br><br><br><br>
</FONT>
</P>
<!-- Item END -->
<BR><BR><BR><BR><P ALIGN="LEFT" STYLE="FONT-SIZE: 10PT"></P><!-- PageBreak START -->
<P>
<HR NOSHADE>
<DIV ALIGN="LEFT" STYLE="PAGE-BREAK-BEFORE:ALWAYS">
<A HREF="#DOCUMENT_TOP">
<U>
<B>
<FONT SIZE="2">Top of the Form</FONT>
</B>
</U>
</A>
</DIV>
<!-- PageBreak END --><!-- SignatureHeader START -->
<P ALIGN="CENTER">
<FONT SIZE="2">
<B>
	SIGNATURES
</B>
</FONT>
</P>
<P ALIGN="LEFT">
<FONT SIZE="2">
	Pursuant to the requirements of the Securities Exchange Act of 1934, the
	registrant has duly caused this report to be signed on its behalf by the
	undersigned hereunto duly authorized.
</FONT>
</P>
<!-- SignatureHeader END --><!-- Signature START -->
<CENTER>
<TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
<TR VALIGN="BOTTOM">
<TD WIDTH="19%">
	&nbsp;
</TD>
<TD WIDTH="34%">
	&nbsp;
</TD>
<TD WIDTH="3%">
	&nbsp;
</TD>
<TD WIDTH="1%">
	&nbsp;
</TD>
<TD WIDTH="43%">
	&nbsp;
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD COLSPAN="3" VALIGN="TOP" ALIGN="LEFT">
<FONT SIZE="2">
	Pegasystems Inc.
</FONT>
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;&nbsp;
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="LEFT" VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="LEFT" VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP">
<FONT SIZE="2">
<I>
	March 17, 2005
</I>
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="LEFT" VALIGN="TOP">
<FONT SIZE="2">
<I>
	By:
</I>
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="LEFT" VALIGN="TOP">
<FONT SIZE="2">
<I>
	/s/ Shawn S. Hoyt
</I>
<BR>
</FONT>
</TD>
</TR>
<TR>
<TD VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="LEFT" VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="LEFT" VALIGN="TOP">
<HR SIZE="1" NOSHADE>
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="LEFT" VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="LEFT" VALIGN="TOP">
<FONT SIZE="2">
<I>
	Name: Shawn S. Hoyt
</I>
</FONT>
</TD>
</TR>
<TR VALIGN="BOTTOM">
<TD VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="LEFT" VALIGN="TOP">
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD>
<FONT SIZE="2">
	&nbsp;
</FONT>
</TD>
<TD ALIGN="LEFT" VALIGN="TOP">
<FONT SIZE="2">
<I>
	Title: Vice President and General Counsel
</I>
</FONT>
</TD>
</TR>
</TABLE>
</CENTER>
<!-- Signature END --><!-- HTMLFooter START -->
</BODY>
</HTML>
<!-- HTMLFooter END -->
</TEXT>
</DOCUMENT>
</SUBMISSION>
