aspenONE® MES Delivers Efficient Data Management, Operational Intelligence via Rich Visualization and Analytics, and Improved Production Execution To Quickly Identify and Resolve Operational Issues

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 Energy, Chemicals, and Other Process Industry Manufacturers Gather in Seattle for AspenTech Supply Chain Management User Conference

Strong license revenue growth drives significant upside on profitability

Updates Include New Aspen IMOS™, Assay Import for Aspen PIMS™, Aspen Deployment Assistant, and New Aspen HYSYS® Teaching Modules

Aspen Technology Announces Entry of Judgment in Litigation with Former Employee

Leading Indian Engineering and Construction Company Increases Investment in aspenONE Application Suite to Support International Growth

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

Jury Returns Verdict against M3 Technology in favor of Aspen Technology in Trade Secret Misappropriation, Copyright Infringement, and Tortious Interference Action

Aspen Technology Announces Delisting From NASDAQ Effective February 19, 2008