Aspen Technology Announces Date of First-Quarter Fiscal 2011 Financial Results Release, Conference Call and Webcast

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

Aspen Technology Announces Date of First-Quarter Fiscal 2010 Financial Results Release, Conference Call and Webcast

Aspen Technology Announces Restatement of Previously Issued Financial Statements

Aspen Technology Announces Conversion of Series D-2 Preferred Stock to Common Stock

Aspen Technology Announces Restatement of Fiscal 2006 Results

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

Aspen Technology Announces Rescheduled Annual Meeting

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

Aspen Technology Announces Appointment of New Independent Registered Public Accounting Firm