Aspen Technology to Present at the William Blair Growth Stock Conference

Aspen Technology to Present at the Wells Fargo Securities 2011 Technology, Media & Telecom Conference

Aspen Technology to Present at UBS Global Technology and Services Conference

Aspen Technology to Present at the Nasdaq 33rd Investor Conference

Aspen Technology to Present at Upcoming Conferences in May

Aspen Technology to Present at the Pacific Crest Emerging Technology Summit

Aspen Technology to Present at Two Investor Conferences in August

Aspen Technology to Present at the Pacific Crest Future Shifts in Technology Forum

Aspen Technology to Present at the Deutsche Bank 2011 Technology Conference

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