Release Details

CAMBRIDGE, Mass.--(BUSINESS WIRE)--April 22, 2002--Aspen Technology, Inc. (Nasdaq:AZPN) today announced it will hold a conference call and Webcast on April 25th at 4:45 p.m. EST to discuss its third quarter financial results, business outlook, and related corporate and financial matters. The Webcast will be open to interested parties by accessing the Investor Relations section of the company's website at http://www.aspentech.com.

         What:             Aspen Technology Management Webcast

         When:             Thursday, April 25, 2002, 4:45 p.m. EST

         Where:            http://www.aspentech.com

         How:              Live over the Internet - Access the call 
                           through the AspenTech homepage

         Contact:          Joshua Young, Director of Investor 
                           Relations, Aspen Technology, Inc.

If you are unable to participate during the live Webcast, the call will be archived on http://www.aspentech.com for ten days. To access the replay, click on Investor Relations and then access the Webcast link.

About AspenTech

Aspen Technology, Inc. is a leading supplier of integrated software and solutions to the process industries. The company's Aspen ProfitAdvantage(TM) solution enables process manufacturers to identify and maximize profit opportunities throughout their entire value chain

• from the supply of raw materials, through the production of goods, to the delivery of final products to customers. The Aspen ProfitAdvantage solution encompasses engineering, manufacturing, supply chain and e-business collaboration technologies, providing the tools that enable manufacturers to design, optimize and execute business processes in real time. Over 1,200 leading process companies already rely on AspenTech's 21 years of process industry experience to increase revenues, reduce costs and improve capital efficiency. AspenTech's customers include: Air Liquide, AstraZeneca, Bayer, BASF, BP, Chevron, Dow Chemical, DuPont, ExxonMobil, GlaxoSmithKline, Lyondell Equistar, Merck, Mitsubishi Chemical, and Unilever. For more information, visit http://www.aspentech.com.

--30--as/na*