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

AspenTech’s Groundbreaking Advance in Physical Property Technology Delivers Unique Modeling Capabilities to the aspenONE® Application Suite

Aspen Technology to Present at the Pacific Crest Emerging Technology Summit

Aspen Technology Announces "Energy on Ice" -- An International Good Will Hockey Game to Benefit Youth Hockey and Charities