Aspen Technology to Present at AEA Classic Conference

October 29, 2003
Company will detail strategy, updated financial performance to investors at industry conference

CAMBRIDGE, Mass., Oct 29, 2003 (BUSINESS WIRE) -- Aspen Technology, Inc. (NASDAQ: AZPN), a leading provider of software and services to the process industries, today announced the company's management team is scheduled to present on November 3rd and 4th, 2003 at the AeA Classic Conference in San Diego, CA. Participating in the conference will be David McQuillin, President & CEO and Charles Kane, Senior VP & CFO of AspenTech. The AEA Classic is one of the most influential investor conferences for investors evaluating small-capitalization technology stocks and is taking place at the Sheraton Hotel & Marina over the next four days.

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, AstraZeneca, 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.

Aspen Technology, Inc.
Joshua Young, 617-949-1274
joshua.young@aspentech.com