<SEC-DOCUMENT>0001104659-15-072480-index.html : 20151023
<SEC-HEADER>0001104659-15-072480.hdr.sgml : 20151023
<ACCEPTANCE-DATETIME>20151023162422
ACCESSION NUMBER:		0001104659-15-072480
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20151023
DATE AS OF CHANGE:		20151023
EFFECTIVENESS DATE:		20151023

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ASPEN TECHNOLOGY INC /DE/
		CENTRAL INDEX KEY:			0000929940
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROGRAMMING SERVICES [7371]
		IRS NUMBER:				042739697
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34630
		FILM NUMBER:		151173122

	BUSINESS ADDRESS:	
		STREET 1:		200 WHEELER ROAD
		CITY:			BURLINGTON
		STATE:			MA
		ZIP:			01803
		BUSINESS PHONE:		6179491000

	MAIL ADDRESS:	
		STREET 1:		200 WHEELER ROAD
		CITY:			BURLINGTON
		STATE:			MA
		ZIP:			01803
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>a15-21288_3defa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: a15-21288_3defa14a.htm

</DOCUMENT>
</SEC-DOCUMENT>