Release Details

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Jan. 29, 2003--Aspen Technology, Inc. (Nasdaq:AZPN) today announced the date and time of its second quarter earnings release and conference call for the period ending, December 31, 2002. The company's management team will hold a Webcast to discuss its financial results and business outlook beginning at 4:45 p.m. on Thursday, January 30, 2003. The Webcast will be open to interested parties by accessing the Investor Relations section of the company's website at http://www.aspentech.com and clicking on the Webcast link.

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 conference call link.

About AspenTech

Aspen Technology, Inc. is a leading supplier of enterprise software to the process industries, enabling its customers to increase their margins and optimize their business performance. AspenTech's engineering solutions, including Hyprotech's technologies, help companies design and improve their plants and processes, maximizing returns throughout their operational life. AspenTech's manufacturing/supply chain solutions allow companies to run their plants and supply chains more profitably, from customer demand through to the delivery of the finished products. Over 1,200 leading companies rely on AspenTech's software every day to drive improvements across their most important engineering and operational processes. AspenTech's customers include: Air Liquide, Aventis, Bayer, BASF, BP, ChevronTexaco, Dow Chemical, DuPont, ExxonMobil, GlaxoSmithKline, Lyondell Equistar, Merck, Mitsubishi Chemical, Shell, Southern Company, TXU Energy and Unilever. For more information, visit www.aspentech.com.

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