<SEC-DOCUMENT>0000929940-18-000039-index.html : 20181026
<SEC-HEADER>0000929940-18-000039.hdr.sgml : 20181026
<ACCEPTANCE-DATETIME>20181026160722
ACCESSION NUMBER:		0000929940-18-000039
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		8
CONFORMED PERIOD OF REPORT:	20181207
FILED AS OF DATE:		20181026
DATE AS OF CHANGE:		20181026
EFFECTIVENESS DATE:		20181026

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:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34630
		FILM NUMBER:		181141731

	BUSINESS ADDRESS:	
		STREET 1:		20 CROSBY DRIVE
		CITY:			BEDFORD
		STATE:			MA
		ZIP:			01730
		BUSINESS PHONE:		781-221-4302

	MAIL ADDRESS:	
		STREET 1:		20 CROSBY DRIVE
		CITY:			BEDFORD
		STATE:			MA
		ZIP:			01730
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEF 14A
<SEQUENCE>1
<FILENAME>a2018proxystatement.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: a2018proxystatement.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>a2018ceopaymix.jpg
<TEXT>
Document 2 - file: a2018ceopaymix.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>a2018neopaymix.jpg
<TEXT>
Document 3 - file: a2018neopaymix.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>aspen2018proxycard001.jpg
<TEXT>
Document 4 - file: aspen2018proxycard001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>aspen2018proxycard002.jpg
<TEXT>
Document 5 - file: aspen2018proxycard002.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>aspentechnologylogoa27.jpg
<TEXT>
Document 6 - file: aspentechnologylogoa27.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>aspentechnologylogoa28.jpg
<TEXT>
Document 7 - file: aspentechnologylogoa28.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>proxysignaturea03.jpg
<TEXT>
Document 8 - file: proxysignaturea03.jpg

</DOCUMENT>
</SEC-DOCUMENT>