Aspen Technology to Present at the William Blair Emerging Growth Stock Conference

Board of Directors Approve $40 Million Share Repurchase Program

Borealis Selects Aspen Mtell Prescriptive Maintenance Software to Improve Reliability

Aspen Technology to Present at the UBS Global Technology & Services Conference

Files Annual Report on Form 10-K for Fiscal Year 2009; Files Quarterly Reports on Form 10-Q for First, Second and Third Quarters Fiscal 2009; Announces Selected Preliminary Financial Results for First Quarter Fiscal 2010

Leading global chemical company expands use of key aspenONE™ Process Engineering suite applications including Aspen Plus®, Aspen Batch Plus® and Aspen Simulation Workbook™

Strong license revenue growth drives significant upside on profitability

Aspen Technology to Present at the Pacific Crest Future Shifts in Technology Forum

Leading international design and engineering and construction company expands use of AspenTech applications, including Aspen HYSYS® and Aspen Plus®

Aspen Technology Announces Entry of Judgment in Litigation with Former Employee