Aspen Technology, Inc. SEC Filings http://ir.aspentech.com/ Aspen Technology, Inc. SEC Filings en 4: Statement of changes in beneficial ownership of securities http://ir.aspentech.com/sec-filings/sec-filing/4/0001127602-19-017739 ASPEN TECHNOLOGY INC /DE/ Wed, 08 May 2019 16:19:12 -0400 Aspen Technology, Inc. SEC Filings 18301 4: Statement of changes in beneficial ownership of securities http://ir.aspentech.com/sec-filings/sec-filing/4/0001127602-19-017431 ASPEN TECHNOLOGY INC /DE/ Mon, 06 May 2019 16:14:02 -0400 Aspen Technology, Inc. SEC Filings 18291 4: Statement of changes in beneficial ownership of securities http://ir.aspentech.com/sec-filings/sec-filing/4/0001127602-19-017256 ASPEN TECHNOLOGY INC /DE/ Fri, 03 May 2019 16:14:07 -0400 Aspen Technology, Inc. SEC Filings 18286 4: Statement of changes in beneficial ownership of securities http://ir.aspentech.com/sec-filings/sec-filing/4/0001127602-19-016723 ASPEN TECHNOLOGY INC /DE/ Wed, 01 May 2019 16:35:23 -0400 Aspen Technology, Inc. SEC Filings 18281 4: Statement of changes in beneficial ownership of securities http://ir.aspentech.com/sec-filings/sec-filing/4/0001127602-19-016716 ASPEN TECHNOLOGY INC /DE/ Wed, 01 May 2019 16:29:23 -0400 Aspen Technology, Inc. SEC Filings 18276 4: Statement of changes in beneficial ownership of securities http://ir.aspentech.com/sec-filings/sec-filing/4/0001127602-18-025472 ASPEN TECHNOLOGY INC /DE/ Thu, 25 Apr 2019 23:09:34 -0400 Aspen Technology, Inc. SEC Filings 17841 4: Statement of changes in beneficial ownership of securities http://ir.aspentech.com/sec-filings/sec-filing/4/0001127602-19-000762 ASPEN TECHNOLOGY INC /DE/ Thu, 25 Apr 2019 23:09:34 -0400 Aspen Technology, Inc. SEC Filings 18071 4: Statement of changes in beneficial ownership of securities http://ir.aspentech.com/sec-filings/sec-filing/4/0001127602-18-026960 ASPEN TECHNOLOGY INC /DE/ Thu, 25 Apr 2019 23:09:34 -0400 Aspen Technology, Inc. SEC Filings 17901 SC 13G/A: An amendment to the SC 13G filing http://ir.aspentech.com/sec-filings/sec-filing/sc-13ga/0001567619-19-003703 ASPEN TECHNOLOGY INC /DE/ Thu, 25 Apr 2019 23:09:34 -0400 Aspen Technology, Inc. SEC Filings 18151 4: Statement of changes in beneficial ownership of securities http://ir.aspentech.com/sec-filings/sec-filing/4/0001127602-18-020004 ASPEN TECHNOLOGY INC /DE/ Thu, 25 Apr 2019 23:09:34 -0400 Aspen Technology, Inc. SEC Filings 17711