<SEC-DOCUMENT>0000929940-18-000047-index.html : 20181221 <SEC-HEADER>0000929940-18-000047.hdr.sgml : 20181221 <ACCEPTANCE-DATETIME>20181221162028 ACCESSION NUMBER: 0000929940-18-000047 CONFORMED SUBMISSION TYPE: S-8 PUBLIC DOCUMENT COUNT: 4 REFERENCES 429: 333-215818 FILED AS OF DATE: 20181221 DATE AS OF CHANGE: 20181221 EFFECTIVENESS DATE: 20181221 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: S-8 SEC ACT: 1933 Act SEC FILE NUMBER: 333-228978 FILM NUMBER: 181249780 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>S-8 <SEQUENCE>1 <FILENAME>a2018forms-8.htm <DESCRIPTION>S-8 <TEXT> Document 1 - file: a2018forms-8.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-4.4 <SEQUENCE>2 <FILENAME>a2018forms-8xexhibit44.htm <DESCRIPTION>EXHIBIT 4.4 <TEXT> Document 2 - file: a2018forms-8xexhibit44.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-5.1 <SEQUENCE>3 <FILENAME>a2018forms-8xexhibit51.htm <DESCRIPTION>EXHIBIT 5.1 <TEXT> Document 3 - file: a2018forms-8xexhibit51.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-23.1 <SEQUENCE>4 <FILENAME>a2018forms-8xexhibit231.htm <DESCRIPTION>EXHIBIT 23.1 <TEXT> Document 4 - file: a2018forms-8xexhibit231.htm
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