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

Burlington, Mass - Aspen Technology, Inc. (NASDAQ: AZPN), a leading provider of software and services to the process industries, today announced that its President and Chief Executive Officer, Mark Fusco, will present at the William Blair Emerging Growth Stock Conference at the InterContinental New York Barclay Hotel in New York City.

Aspen Technology’s presentation will begin at 4:15 p.m. Eastern Time on Tuesday, October 5, 2010, and a live audio webcast of the 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.

© 2010 Aspen Technology, Inc. AspenTech, aspenONE, the Aspen leaf logo and the 7 Best Practices of Engineering Excellence are trademarks of Aspen Technology, Inc. All rights reserved. All other trademarks are property of their respective owners.