AspenTech Receives Additional Staff Determination Letter from Nasdaq Relating to Quarterly Report on Form 10-Q

AspenTech Announces Selected Preliminary Q407 Results and Update on Restatement of Previously Issued Financial Statements

AspenTech Joins FIATECH Industry Consortium

AspenTech Announces Selected Preliminary Fiscal Q1 2008 Results

Aspentech Announces SEC Settlement

aspenONE Delivers Major Performance Improvements at PetroChina Polyethylene Plant

AspenTech Announces New Corporate Headquarters

Aspen Technology to Present at the 9th Annual Needham Growth Conference

Receives SSPA’s STAR Award for Excellence in Self-Service Capabilities

Aspen Technology Comments on Civil Complaint Filed by the Securities and Exchange Commission Against Three Former Officers and the Criminal Complaint Filed by the U.S. Attorney Against One of them, David L. McQuillin