<SEC-DOCUMENT>0000929940-21-000077-index.html : 20211028
<SEC-HEADER>0000929940-21-000077.hdr.sgml : 20211028
<ACCEPTANCE-DATETIME>20211028171522
ACCESSION NUMBER:		0000929940-21-000077
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		17
CONFORMED PERIOD OF REPORT:	20211210
FILED AS OF DATE:		20211028
DATE AS OF CHANGE:		20211028

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:		211359432

	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>fy21proxystatement.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: fy21proxystatement.htm

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

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<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>aspentechnologylogoa54.jpg
<TEXT>
Document 3 - file: aspentechnologylogoa54.jpg

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<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>avgagea.jpg
<TEXT>
Document 4 - file: avgagea.jpg

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<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>ceopaymixa.jpg
<TEXT>
Document 5 - file: ceopaymixa.jpg

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<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>chart-261538d3cfe94764a19.jpg
<TEXT>
Document 6 - file: chart-261538d3cfe94764a19.jpg

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<FILENAME>chart-c01aa948512841b9ade.jpg
<TEXT>
Document 7 - file: chart-c01aa948512841b9ade.jpg

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<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>diversitya.jpg
<TEXT>
Document 8 - file: diversitya.jpg

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<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>laptopa.jpg
<TEXT>
Document 9 - file: laptopa.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>lettera.jpg
<TEXT>
Document 10 - file: lettera.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>neopaymixa.jpg
<TEXT>
Document 11 - file: neopaymixa.jpg

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<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>phonea.jpg
<TEXT>
Document 12 - file: phonea.jpg

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<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>proxycardp1v3.jpg
<TEXT>
Document 13 - file: proxycardp1v3.jpg

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<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>proxycardp2v3.jpg
<TEXT>
Document 14 - file: proxycardp2v3.jpg

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<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>proxysignaturea05.jpg
<TEXT>
Document 15 - file: proxysignaturea05.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>roundtablea.jpg
<TEXT>
Document 16 - file: roundtablea.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>yearsofservicea.jpg
<TEXT>
Document 17 - file: yearsofservicea.jpg

</DOCUMENT>
</SEC-DOCUMENT>