Aspen Technology Announces Earnings Conference Call and Webcast

August 13, 2002

Earnings Release Will be Issued On Thursday, August 15, 2002 After the Market Close

CAMBRIDGE, Mass., Aug 13, 2002 (BUSINESS WIRE) -- Aspen Technology, Inc. (Nasdaq:AZPN) today announced it will hold a conference call and Webcast to discuss its fourth quarter and fiscal year 2002 financial results, business outlook, and related corporate and financial matters at 4:45 p.m. eastern time on Thursday, August 15th. The Webcast will be open to interested parties by accessing the Investor Relations section of the company's website at http://www.aspentech.com. A replay of the call will be archived on AspenTech's website for ten days and will also be available for four days via telephone, beginning at 8:00 p.m. EST on August 15, 2002, by dialing 719-457-0820 and entering in confirmation code 150110.

What: Aspen Technology Earnings Conference Call and Webcast

When: Thursday, August 15, 2002, 4:45 p.m. eastern time

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.

About AspenTech

Aspen Technology, Inc. is a leading supplier of enterprise software to the process industries. AspenTech's industry solutions enable companies to maximize their profitability by running their manufacturing and supply chain operations more efficiently, and by increasing the returns from their plant assets. Over 1,200 leading 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, ChevronTexaco, Dow Chemical, DuPont, ExxonMobil, GlaxoSmithKline, Lyondell Equistar, Merck, Mitsubishi Chemical, Shell and Unilever. For more information, visit www.aspentech.com.

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

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