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

Aspen Technology Receives Staff Determination from Nasdaq

Aspen Technology Files Extension for Second Quarter Form 10-Q

Aspen Technology Completes Restatement and Files Amended Annual Report on Form 10-K Reports Record Results for Fiscal Second Quarter 2007

Aspen Technology Appoints James Hintlian to Launch Pharmaceuticals Business Unit

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

Aspen Technology Announces Selected Financial Results for Second-Quarter Fiscal Year 2007

Aspen Technology Announces Secondary Offering of 18,000,000 Shares of Common Stock by Affiliates of Advent International

Aspen Technology Announces Restatement of Previously Issued Financial Statements

Aspen Technology Announces Financial Results for Third-Quarter Fiscal Year 2007