Aspen Technology Announces Financial Results for the First Quarter Fiscal 2011

Board of Directors Approve $40 Million Share Repurchase Program

Aspen Technology to Present at the 38th Annual J.P. Morgan Global Technology, Media & Telecom Conference

Aspen Technology to Present at the 38th Annual J.P. Morgan Global Technology, Media & Telecom Conference

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

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

Aspen Technology to Present at 12th Annual Needham Growth Conference

Aspen Technology to Present at 12th Annual Needham Growth Conference

Leading North American Energy Company Upgrades to aspenONE® V7

AspenTech Helps Customer Integrate Engineering with Operations to Achieve Operational Excellence Objectives

DuPont to Discuss How Integrated Basic Engineering Improves the Efficiency and Quality of Capital Projects

DuPont to Discuss How Integrated Basic Engineering Improves the Efficiency and Quality of Capital Projects

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

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

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

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

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

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

Page 260 of 347