Aspen Technology Announces Selected Preliminary Financial Results for Second Quarter Fiscal 2008

Eliminates approximately $15 million in future annual preferred stock discount and dividends

Aspen Technology Announces Selected Financial Results for Fourth-Quarter Fiscal Year 2006, Stock Option Grant Review and Restatement

Aspen Technology Announces Closure of FTC Investigation and Agreement to Modify Consent Decree

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

Aspen Technology Announces Appointment of New Independent Registered Public Accounting Firm

Aspen Technology Announces Restatement of Previously Issued Financial Statements

Aspen Technology Acquires Mnubo and Sabisu

Aspen Technology Announces Restatement of Fiscal 2006 Results

Aspen Edge Connect and Aspen Cloud Connect Software Now Available in aspenONE Version 101