Aspen Technology’s President and Chief Executive Officer, Mark Fusco, and Chief Financial Officer, Mark Sullivan, are presenting at:

• The 29th Annual Canaccord Adams Global Growth Conference being held at the InterContinental Hotel in Boston on Tuesday, August 11, 2009 at 5:00 p.m. Eastern Time
• Oppenheimer’s Annual Communications, Technology & Internet Conference being held at the Four Seasons Hotel in Boston on Wednesday, August 12, 2009 at 3:10 p.m. Eastern Time

A live audio webcast of each presentation will be available for a limited time in the Investor Relations section of the company’s website (www.aspentech.com).

About AspenTech
AspenTech is a leading supplier of software that optimizes process manufacturing – for energy, chemicals, pharmaceuticals, engineering and construction, and other industries that manufacture and produce products from a chemical process. With integrated aspenONE solutions, process manufacturers can implement best practices for optimizing their engineering, manufacturing and supply chain operations. As a result, AspenTech customers are better able to increase capacity, improve margins, reduce costs and become more energy efficient. To see how the world’s leading process manufacturers rely on AspenTech to achieve their operational excellence goals, visit www.aspentech.com.