Aspen Technology to Present at UBS Global Technology and Services Conference

Aspen Technology to Present at Two Investor Conferences in May

Aspen Technology to Present at Two Investor Conferences in August

Aspen Technology to Host Investor Day

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

Files Annual Report on Form 10-K for Fiscal Year 2008

Files Annual Report on Form 10-K for Fiscal Year 2009; Files Quarterly Reports on Form 10-Q for First, Second and Third Quarters Fiscal 2009; Announces Selected Preliminary Financial Results for First Quarter Fiscal 2010

Aspen Technology Names Mark Sullivan Chief Financial Officer

Aspen Technology Announces Date of Selected Preliminary Fiscal 2009 Third-Quarter Financial Results Release, Conference Call and Webcast

Aspen Technology Announces Selected Preliminary Financial Results for the Third Quarter of Fiscal Year 2009