Company Approved to Relist on NASDAQ Stock Market

Aspen Technology Announces Financial Results for the Fourth Quarter and Fiscal Year 2010

Aspen Technology to Present at 12th Annual Needham Growth Conference

Board of Directors Approve $40 Million Share Repurchase Program

Aspen Technology to Present at the William Blair Emerging Growth Stock Conference

Aspen Technology Announces Pricing of Secondary Public Offering

Aspen Technology Announces Financial Results for the Third Quarter Fiscal Year 2010

Cabot and AMR Research to Highlight Innovative Processes and Technologies That Improve Supply Chain Agility

Dow to Discuss How It Models CO2 Removal with Advanced Rate-Based Distillation

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