Aspen Technology Announces Date of Fiscal 2007 Second-Quarter Financial Results Release, Conference Call and Webcast

Aspen Technology Announces Date of First-Quarter Fiscal 2012 Financial Results Release, Conference Call, Webcast

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

Aspen Technology Announces Date of Fiscal 2007 Third-Quarter Financial Results Release, Conference Call and Webcast

Arbitral Tribunal Issues Award in Favor of Aspen Technology in Arbitration Proceeding vs. Advanced Technology Middle East, WLL

Alison Smith Joins AspenTech as Vice President of Marketing Strategy & Research

Aspen Technology to Present at the 9th Annual Needham Growth Conference

Aspen Technology to Present at the 11th Annual Needham Growth Stock Conference

Aspen Technology to Present at the Deutsche Bank dbAccess Technology Conference

Aspen Technology to Present at the Deutsche Bank 2011 Small & Mid Cap Conference